FIRST BANK SYSTEM INC
S-4/A, 1995-12-29
NATIONAL COMMERCIAL BANKS
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<PAGE>
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 29, 1995
    
   
                                                       REGISTRATION NO. 33-64447
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------

   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-4
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------

                            FIRST BANK SYSTEM, INC.
   (to be renamed "First Interstate Bancorp" upon consummation of the merger
                               discussed herein)
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                  <C>                                  <C>
             DELAWARE                               6711                              41-0255900
   (State or other jurisdiction         (Primary Standard Industrial               (I.R.S. Employer
 of incorporation or organization)       Classification Code Number)              Identification No.)
</TABLE>

                                FIRST BANK PLACE
                            601 SECOND AVENUE SOUTH
                       MINNEAPOLIS, MINNESOTA 55402-4302
                                 (612) 973-1111
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                               LEE R. MITAU, ESQ.
                            FIRST BANK SYSTEM, INC.
                                FIRST BANK PLACE
                            601 SECOND AVENUE SOUTH
                       MINNEAPOLIS, MINNESOTA 55402-4302
                                 (612) 973-1111
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                            ------------------------

                                   COPIES TO:

<TABLE>
<S>                                <C>                            <C>
     Victor I. Lewkow, Esq.        Patrick F. Courtemanche, Esq.         Fred B. White, III, Esq.
    Cleary, Gottlieb, Steen &        Dorsey & Whitney P.L.L.P.     Skadden, Arps, Slate, Meagher & Flom
            Hamilton
        One Liberty Plaza             220 South Sixth Street                 919 Third Avenue
    New York, New York 10006       Minneapolis, Minnesota 55402          New York, New York 10022
</TABLE>

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

   APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE OF THE SECURITIES TO THE
                                    PUBLIC:
         At the Effective Time as described in the attached Joint Proxy
                             Statement/Prospectus.
                            ------------------------

   
    If  any of the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance  with
General Instruction G, check the following box. / /
    
                            ------------------------

    THE  REGISTRANT HEREBY  AMENDS THIS REGISTRATION  STATEMENT ON  SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A  FURTHER  AMENDMENT  WHICH SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT  SHALL THEREAFTER BECOME EFFECTIVE IN  ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT  OF 1933  OR UNTIL  THE REGISTRATION  STATEMENT SHALL  BECOME
EFFECTIVE  ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                            FIRST BANK SYSTEM, INC.
                             CROSS REFERENCE SHEET
                   PURSUANT TO ITEM 501(B) OF REGULATION S-K

   
<TABLE>
<CAPTION>
           ITEM NO. IN FORM S-4                                              LOCATION IN JOINT PROXY STATEMENT/PROSPECTUS
           -------------------------------------------------------------  ---------------------------------------------------
<S>        <C>        <C>                                                 <C>
A.         INFORMATION ABOUT THE TRANSACTION
                  1.  Forepart of Registration Statement and Outside      Facing page of registration statement; Outside
                       Front Cover Page of Prospectus                      front cover page of Joint Proxy
                                                                           Statement/Prospectus
                  2.  Inside Front and Outside Back Cover Pages of        Available Information; Incorporation of Certain
                       Prospectus                                          Documents by Reference; Table of Contents
                  3.  Risk Factors, Ratio of Earnings to Fixed Charges    Summary; Comparative Unaudited Per Share Data;
                       and Other Information                               Selected Historical and Unaudited Pro Forma
                                                                           Financial Data
                  4.  Terms of the Transaction                            Summary; The Merger; Incorporation of Certain
                                                                           Documents by Reference; Description of FBS and New
                                                                           First Interstate Capital Stock
                  5.  Pro Forma Financial Information                     Selected Historical and Unaudited Pro Forma
                                                                           Financial Data; Unaudited Pro Forma Condensed
                                                                           Combined Financial Information
                  6.  Material Contacts with the Company Being Acquired   Summary; The Merger
                  7.  Additional Information Required for Reoffering by   *
                       Persons and Parties Deemed to be Underwriters
                  8.  Interests of Named Experts and Counsel              Legal Opinions; Experts
                  9.  Disclosure of Commission Position on                *
                       Indemnification for Securities Act Liabilities
B.         INFORMATION ABOUT THE REGISTRANT
                 10.  Information with Respect to S-3 Registrants         Available Information; Incorporation of Certain
                                                                           Documents by Reference; Summary; First Bank
                                                                           System, Inc.; Description of FBS and New First
                                                                           Interstate Capital Stock
                 11.  Incorporation of Certain Information by Reference   Incorporation of Certain Documents by Reference
                 12.  Information with Respect to S-2 or S-3 Registrants  *
                 13.  Incorporation of Certain Information by Reference   *
                 14.  Information with Respect to Registrants Other Than  *
                       S-2 or S-3 Registrants
</TABLE>
    

<PAGE>

   
<TABLE>
<CAPTION>
           ITEM NO. IN FORM S-4                                              LOCATION IN JOINT PROXY STATEMENT/PROSPECTUS
           -------------------------------------------------------------  ---------------------------------------------------
<S>        <C>        <C>                                                 <C>
C.         INFORMATION ABOUT THE COMPANY BEING
           ACQUIRED
                 15.  Information with Respect to S-3 Companies           Incorporation of Certain Documents by Reference;
                                                                           Summary; First Interstate Bancorp; Description of
                                                                           FBS and New First Interstate Capital Stock
                 16.  Information with Respect to S-2 or S-3 Companies    *
                 17.  Information with Respect to Companies Other Than    *
                       S-3 or S-2 Companies
D.         VOTING AND MANAGEMENT INFORMATION
                 18.  Information if Proxies, Consents or Authorizations  Incorporation of Certain Documents by Reference;
                       are to be Solicited                                 Summary; Information Concerning the FBS Special
                                                                           Meeting; Information Concerning the First
                                                                           Interstate Special Meeting; The Merger; Management
                                                                           and Additional Information
                 19.  Information if Proxies, Consents or Authorizations  *
                       are not to be Solicited or in an Exchange Offer
</TABLE>
    

- ------------------------
*Answer is negative or item is not applicable.
<PAGE>
                                     [LOGO]
                            FIRST BANK SYSTEM, INC.
                                FIRST BANK PLACE
                            601 SECOND AVENUE SOUTH
                       MINNEAPOLIS, MINNESOTA 55402-4302
   
                                                                          , 1996
    
Dear Shareholder:

    A  special meeting (including any adjournments or postponements thereof, the
"FBS Special Meeting") of holders of  the common stock ("FBS Common Stock"  and,
after  the merger (the  "Merger") described below,  "New First Interstate Common
Stock") of First  Bank System,  Inc. ("FBS" and,  after the  Merger, "New  First
Interstate")  has been scheduled  for                ,                 , 1996 at
                            , Minneapolis, Minnesota, at        a.m. local time.
The  accompanying   Notice   of   the   FBS   Special   Meeting,   Joint   Proxy
Statement/Prospectus  and  Proxy  Card  set  forth  the  formal  business  to be
transacted at the FBS Special Meeting. I encourage you to review these materials
and to attend the FBS Special Meeting.

    At the FBS Special Meeting, holders of  FBS Common Stock are being asked  to
approve  (i) the issuance of shares of FBS Common Stock to holders of the common
stock ("First  Interstate Common  Stock") of  First Interstate  Bancorp  ("First
Interstate")  in  connection  with  the  consummation  of  the  Merger,  (ii) an
amendment to  FBS's  Certificate of  Incorporation  (the "FBS  Certificate")  to
change  its name  to "First  Interstate Bancorp"  upon the  effectiveness of the
Merger and (iii) an amendment to the  FBS Certificate to increase the number  of
its  authorized shares of  common stock from 200,000,000  to 500,000,000 and its
authorized shares of preferred stock  from 10,000,000 to 15,000,000  immediately
prior to the effectiveness of the Merger (collectively, the "FBS Vote Matters").
The  FBS Vote  Matters are being  considered by  holders of FBS  Common Stock in
connection with the Agreement and Plan of Merger (the "Merger Agreement")  among
FBS,  a wholly owned  subsidiary of FBS  and First Interstate  pursuant to which
First Interstate would become a wholly owned subsidiary of New First Interstate.
In the Merger, each outstanding share  of First Interstate Common Stock will  be
converted  into the right to  receive 2.60 shares (the  "Exchange Ratio") of New
First Interstate Common  Stock (with cash  paid in lieu  of fractional  shares),
each  share  of  First  Interstate  9.875%  preferred  stock,  Series  F ("First
Interstate 9.875% Preferred Stock") will be converted into the right to  receive
one  share of New First Interstate 9.875% preferred stock ("New First Interstate
9.875% Preferred  Stock") and  each  share of  First Interstate  9.0%  preferred
stock,  Series G (collectively with the First Interstate 9.875% Preferred Stock,
"First Interstate Preferred Stock") will be converted into the right to  receive
one  share of New  First Interstate 9.0% preferred  stock ("New First Interstate
9.0% Preferred Stock"). The New First Interstate 9.875% Preferred Stock and  the
New First Interstate 9.0% Preferred Stock will have substantially the same terms
as  the corresponding series of First Interstate  Preferred Stock and, as in the
case of the First Interstate Preferred Stock, will be represented by  depositary
shares.  Each outstanding  share of  FBS Common  Stock and  preferred stock will
remain outstanding after the Merger as shares of New First Interstate.

    THE FBS BOARD OF  DIRECTORS HAS APPROVED THE  FBS VOTE MATTERS AND  BELIEVES
THAT  THESE  ACTIONS ARE  IN THE  BEST  INTERESTS OF  FBS AND  ITS SHAREHOLDERS.
ACCORDINGLY, THE  BOARD  RECOMMENDS THAT  YOU  VOTE FOR  EACH  OF THE  FBS  VOTE
MATTERS.  FBS's financial advisor, J.P. Morgan Securities Inc., has rendered its
written opinion to the FBS Board of Directors that the Exchange Ratio is fair to
holders of FBS Common Stock from a financial point of view.

    Approval of each of the FBS Vote Matters is contingent upon the approval  of
each of the other FBS Vote Matters.

    If  the accompanying Proxy Card is executed  properly and returned to FBS in
time to be voted at the FBS Special Meeting, the shares represented thereby will
be voted  in  accordance with  the  instructions marked  thereon.  EXECUTED  BUT
UNMARKED  PROXIES  WILL BE  VOTED  FOR APPROVAL  OF  THE FBS  VOTE  MATTERS. The
presence of a  shareholder at  the FBS  Special Meeting  will not  automatically
revoke  such shareholder's proxy. A shareholder  may, however, revoke a proxy at
any time prior to its exercise by filing a written notice of revocation with  or
delivering  a  duly  executed  proxy  bearing a  later  date  to  Lee  R. Mitau,
Secretary, First Bank System, Inc., First  Bank Place, 601 Second Avenue  South,
Minneapolis,  Minnesota 55402-4302 or  by attending the  FBS Special Meeting and
voting in person.

    The issuance  of the  FBS  Common Stock  pursuant  to the  Merger  Agreement
requires the affirmative vote of a majority of the votes cast at the FBS Special
Meeting, and that the holders of a majority of the FBS Common Stock are present,
in  person  or by  proxy,  and vote  at the  FBS  Special Meeting.  The proposed
amendments to the FBS Certificate require the affirmative vote of the holders of
a majority of the outstanding  shares of FBS Common  Stock. Approval of each  of
the  FBS  Vote Matters  is contingent  upon the  approval of  each of  the other
matters. Accordingly, it is very important  that your shares are represented  at
the FBS Special Meeting. I urge you to vote FOR each of the FBS Vote Matters and
to  complete,  sign, date  and return  the  accompanying proxy  card as  soon as
possible, even if  you plan to  attend the FBS  Special Meeting. This  procedure
will  not prevent you from  voting in person, but will  ensure that your vote is
counted if you are unable to attend.
                                         Very truly yours,

                                                     [LOGO]
                                         John F. Grundhofer
                                         CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE
                                         OFFICER
<PAGE>
                            FIRST BANK SYSTEM, INC.
                                FIRST BANK PLACE
                            601 SECOND AVENUE SOUTH
                       MINNEAPOLIS, MINNESOTA 55402-4302

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

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                        TO BE HELD ON            , 1996

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

    NOTICE IS HEREBY GIVEN that a special meeting (including any adjournments or
postponements thereof,  the "FBS  Special  Meeting") of  holders of  the  common
stock,  $1.25 par value ("FBS Common Stock" and, after the merger (the "Merger")
described below, "New  First Interstate  Common Stock"), of  First Bank  System,
Inc.,   a  Delaware  corporation  ("FBS"  and,  after  the  Merger,  "New  First
Interstate"), will be  held on                  , 1996,  at
                     ,  Minneapolis, Minnesota, at      a.m. local time. A Proxy
Card and  Joint  Proxy Statement/Prospectus  for  the FBS  Special  Meeting  are
enclosed.

    The FBS Special Meeting is for the purpose of considering and acting upon:

        1.   A proposal to  approve the issuance of  up to 207,480,000 shares of
    FBS Common Stock  to holders of  the common stock,  $2.00 par value  ("First
    Interstate   Common  Stock"),  of  First   Interstate  Bancorp,  a  Delaware
    corporation ("First Interstate"), in connection with the Agreement and  Plan
    of Merger, dated as of November 5, 1995 (the "Merger Agreement"), among FBS,
    Eleven  Acquisition Corp., a  wholly owned subsidiary of  FBS and a Delaware
    corporation ("Merger Sub"),  and First  Interstate. Pursuant  to the  Merger
    Agreement,  among other things, Merger Sub  will, upon the terms and subject
    to the conditions  set forth in  the Merger Agreement,  merge with and  into
    First  Interstate. As a result, First  Interstate will become a wholly owned
    subsidiary of  New First  Interstate  and each  outstanding share  of  First
    Interstate  Common Stock  will be converted  into the right  to receive 2.60
    shares of  New First  Interstate Common  Stock (with  cash paid  in lieu  of
    fractional shares), each outstanding share of 9.875% preferred stock, Series
    F, $200 liquidation preference of First Interstate ("First Interstate 9.875%
    Preferred  Stock"), will be converted into the right to receive one share of
    9.875% preferred stock of New First Interstate, $1.00 par value ("New  First
    Interstate  9.875%  Preferred Stock"),  and each  outstanding share  of 9.0%
    preferred stock, Series G, $200  liquidation preference of First  Interstate
    (collectively  with  the  First Interstate  9.875%  Preferred  Stock, "First
    Interstate Preferred Stock") will be converted into the right to receive one
    share of 9.0% preferred stock of New First Interstate, $1.00 par value ("New
    First Interstate 9.0%  Preferred Stock").  The New  First Interstate  9.875%
    Preferred  Stock and the New First Interstate 9.0% Preferred Stock will have
    terms substantially the same as the corresponding series of First Interstate
    Preferred Stock and, as in the case of the First Interstate Preferred Stock,
    will be  represented by  depositary shares.  Each outstanding  share of  FBS
    Common  Stock and FBS  preferred stock will remain  outstanding as shares of
    New First Interstate following the Merger. A copy of the Merger Agreement is
    attached as Appendix A to the accompanying Joint Proxy Statement/Prospectus.

        2.    A  proposal  to  approve  an  amendment  to  the  Certificate   of
    Incorporation  of FBS (the "FBS Certificate") to change its name from "First
    Bank System, Inc." to "First  Interstate Bancorp" upon the effectiveness  of
    the Merger.

        3.    A proposal  to  approve an  amendment  to the  FBS  Certificate to
    increase  the  number  of  its  authorized  shares  of  common  stock   from
    200,000,000 to 500,000,000 and its authorized shares of preferred stock from
    10,000,000 to 15,000,000 immediately prior to effectiveness of the Merger.

        4.   Such  other matters  as may  properly come  before the  FBS Special
    Meeting.

   
    The proposals listed  in paragraphs (1)  through (3) above  are referred  to
collectively  as the "FBS  Vote Matters." The  approval of each  of the FBS Vote
Matters is contingent upon approval of each  of the other FBS Vote Matters.  The
Board  of Directors of FBS is not aware of any other business to come before the
FBS Special Meeting.
    

    THE BOARD OF DIRECTORS OF FBS RECOMMENDS THAT SHAREHOLDERS VOTE FOR EACH  OF
THE FBS VOTE MATTERS.
<PAGE>
   
    The  Board  of  Directors  of  FBS  has  fixed  the  close  of  business  on
            , 1996 as the  record date for determination  of the holders of  FBS
Common  Stock entitled to  notice of and to  vote at the  FBS Special Meeting. A
list of the holders of FBS Common Stock will be available for examination by any
FBS shareholder  for  purposes germane  to  the  FBS Special  Meeting  at  FBS's
headquarters  located at First Bank Place, 601 Second Avenue South, Minneapolis,
Minnesota during normal business hours for a period of at least 10 days prior to
the FBS Special Meeting and at the FBS Special Meeting.
    

    It is very  important that  your shares be  represented at  the FBS  Special
Meeting.  You are urged to complete and  sign the accompanying Proxy Card, which
is solicited by  the Board  of Directors  of FBS, and  mail it  promptly in  the
enclosed envelope. All proxies are important, so please complete each Proxy Card
sent to you and return it in the envelope provided. No proxy will be used if you
attend and vote at the FBS Special Meeting in person.

                                          BY ORDER OF THE BOARD OF DIRECTORS

                                                  [LOGO]
                                          Lee R. Mitau
                                          SECRETARY

Minneapolis, Minnesota
   
            , 1996
    

   
IMPORTANT:  PLEASE RETURN  EACH PROXY  CARD SENT  TO YOU.  THE PROMPT  RETURN OF
PROXIES WILL SAVE FBS THE EXPENSE OF FURTHER REQUESTS FOR PROXIES. AN  ADDRESSED
ENVELOPE  IS ENCLOSED FOR YOUR CONVENIENCE. NO  POSTAGE IS REQUIRED IF MAILED IN
THE UNITED STATES.
    
<PAGE>
                     [FIRST INTERSTATE BANCORP LETTERHEAD]

   
                                                                          , 1996
    

Dear Shareholder:

    You are cordially  invited to attend  a special meeting  of shareholders  of
First  Interstate Bancorp ("First Interstate") to be held on              , 1996
at                      , at        a.m. local time (the "Special Meeting").

    At the Special  Meeting, holders of  First Interstate Common  Stock will  be
asked  to consider and vote on a proposal  to approve and adopt an Agreement and
Plan of Merger (the "Merger Agreement") providing for the merger (the  "Merger")
of  First Interstate with a  wholly owned subsidiary of  First Bank System, Inc.
("FBS"). In the Merger, each outstanding share of First Interstate Common  Stock
will  be converted into the right to  receive 2.60 shares (the "Exchange Ratio")
of FBS Common Stock (with cash paid in lieu of fractional shares) and each share
of preferred  stock of  First Interstate  will be  converted into  the right  to
receive   one  newly  issued  share  of   preferred  stock  of  FBS  with  terms
substantially similar to the corresponding series of First Interstate  preferred
stock.

    The First Interstate Board of Directors has approved the proposed Merger and
has  determined that the Merger is in the best interests of First Interstate and
its shareholders. Accordingly, the  Board recommends that you  vote in favor  of
the  approval  and  adoption  of  the  Merger  Agreement  and  the  transactions
contemplated  thereby.  Goldman,  Sachs   &  Co.  and   Morgan  Stanley  &   Co.
Incorporated,  First Interstate's financial advisors,  have each delivered their
written opinion to  the First Interstate  Board of Directors  that the  Exchange
Ratio is fair to the holders of First Interstate Common Stock.

    Consummation  of the Merger is subject to certain conditions, including, but
not limited to,  approvals by  the requisite vote  of the  shareholders of  both
First  Interstate and FBS and  the approval of the  Merger by various regulatory
agencies.

    The enclosed Notice of Special Meeting and Joint Proxy  Statement/Prospectus
describe  the  Merger and  provide  specific information  regarding  the Special
Meeting. Please read these materials carefully.

    It is  very  important that  your  shares  are represented  at  the  Special
Meeting,  whether or not you  plan to attend in  person. The affirmative vote of
the holders of a majority of the votes that may be cast by all First  Interstate
shareholders entitled to vote at the Special Meeting is required for approval of
the  Merger Agreement. A  failure to vote  for approval of  the Merger Agreement
will have the same effect as a  vote against the Merger Agreement. Therefore,  I
urge  you to execute, date and return the enclosed proxy appointment card in the
enclosed postage-paid envelope as  soon as possible to  assure that your  shares
will  be voted at the  Special Meeting. YOU SHOULD  NOT SEND IN CERTIFICATES FOR
YOUR FIRST INTERSTATE SHARES AT THIS TIME.

    On behalf of the Board of Directors, I thank you for your support, and again
urge you to vote FOR approval of the Merger.

                                          Very truly yours,

                                          William E. B. Siart
                                          CHAIRMAN AND CHIEF EXECUTIVE OFFICER
<PAGE>
                            FIRST INTERSTATE BANCORP
                             633 WEST FIFTH STREET
                         LOS ANGELES, CALIFORNIA 90071
                            ------------------------

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                        TO BE HELD ON            , 1996
                            ------------------------

    NOTICE IS HEREBY GIVEN that a special meeting (including any adjournments or
postponements thereof, the  "First Interstate  Special Meeting")  of holders  of
common  stock, $2.00 par  value (the "First Interstate  Common Stock"), of First
Interstate Bancorp, a Delaware corporation ("First Interstate"), will be held on
            , 1996, at                      , at        a.m. local time. A Proxy
Card and  Joint  Proxy Statement/Prospectus  for  the First  Interstate  Special
Meeting are enclosed. The First Interstate Special Meeting is for the purpose of
considering and acting upon:

   
        1.   A proposal to  approve and adopt the  Agreement and Plan of Merger,
    dated as of November  5, 1995 (the "Merger  Agreement"), by and among  First
    Bank  System,  Inc., a  Delaware corporation  ("FBS"  and, after  the Merger
    described below, "New First Interstate"), Eleven Acquisition Corp., a wholly
    owned subsidiary of FBS and a Delaware corporation ("Merger Sub"), and First
    Interstate, and the transactions contemplated thereby, including the  merger
    (the  "Merger") of Merger Sub, upon the  terms and subject to the conditions
    set forth in  the Merger  Agreement, with  and into  First Interstate,  with
    First  Interstate surviving the  Merger as a wholly  owned subsidiary of New
    First Interstate. A copy of the  Merger Agreement is attached as Appendix  A
    to the accompanying Joint Proxy Statement/Prospectus.
    

        2.   Such other matters as may properly come before the First Interstate
    Special Meeting.

   
    The Board has fixed  the close of business  on                , 1996 as  the
record  date for determination of the shareholders  entitled to notice of and to
vote at the First Interstate Special  Meeting. A list of shareholders of  record
will be available for examination by any shareholder for purposes germane to the
First  Interstate Special Meeting at  First Interstate's headquarters located at
633 West Fifth Street,  Los Angeles, California  during ordinary business  hours
for  a period of at least 10 days  prior to the First Interstate Special Meeting
and at the First Interstate Special Meeting.
    

    THE BOARD OF DIRECTORS  RECOMMENDS THAT SHAREHOLDERS  APPROVE AND ADOPT  THE
MERGER  AGREEMENT  AND  THE  TRANSACTIONS  CONTEMPLATED  THEREBY,  INCLUDING THE
MERGER.

    Your vote is  important regardless  of the number  of shares  you own.  Each
shareholder,  even if he or she now plans to attend the First Interstate Special
Meeting, is requested to sign, date  and return the enclosed Proxy Card  without
delay  in the enclosed postage-paid  envelope. You may revoke  your proxy at any
time prior to  its exercise.  Any shareholder  present at  the First  Interstate
Special  Meeting may revoke his or her  proxy and vote personally on each matter
brought before the First Interstate Special Meeting.

                                          BY ORDER OF THE BOARD OF DIRECTORS

                                          Edward S. Garlock
                                          SECRETARY

   
Los Angeles, California
            , 1996
    

IMPORTANT: PLEASE SIGN AND DATE THE ENCLOSED PROXY CARD AND MAIL IT PROMPTLY  IN
THE ENCLOSED ENVELOPE, WHICH REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES.
YOU SHOULD NOT FORWARD SHARE CERTIFICATES AT THIS TIME.
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
   
                 SUBJECT TO COMPLETION, DATED DECEMBER 29, 1995
    

                             JOINT PROXY STATEMENT
                                       OF
                            FIRST BANK SYSTEM, INC.
                                      AND
                            FIRST INTERSTATE BANCORP
                        SPECIAL MEETINGS OF SHAREHOLDERS
                                          , 1996
                            ------------------------

                                   PROSPECTUS
                                       OF
                            FIRST BANK SYSTEM, INC.
                   (TO BE RENAMED "FIRST INTERSTATE BANCORP"
                         FOLLOWING CONSUMMATION OF THE
                            MERGER DESCRIBED HEREIN)
                            ------------------------

    This Joint Proxy Statement/Prospectus (the "Joint Proxy
Statement/Prospectus") is being furnished to holders of the common stock,  $1.25
par  value ("FBS Common Stock"  and, after the Merger  (as defined herein), "New
First Interstate  Common  Stock"),  of  First  Bank  System,  Inc.,  a  Delaware
corporation ("FBS" and, after the Merger, "New First Interstate"), in connection
with  the solicitation  of proxies by  the Board  of Directors of  FBS (the "FBS
Board") for use  at the special  meeting of shareholders  of FBS (including  any
adjournments  or postponements thereof, the "FBS Special Meeting") to be held on
          , 1996, at     a.m. local time at                . At the FBS  Special
Meeting, holders of FBS Common Stock are being asked to approve (i) the issuance
(the  "Proposed Issuance")  of shares  of FBS Common  Stock to  holders of First
Interstate Common Stock in connection with the consummation of the Merger,  (ii)
an  amendment to FBS's  Certificate of Incorporation  (the "FBS Certificate") to
change  its  name  to  "First   Interstate  Bancorp"  and  (iii)  an   amendment
(collectively  with  the amendment  described in  clause (ii),  the "Certificate
Amendments") to the FBS Certificate to increase the number of authorized  shares
of FBS Common Stock from 200,000,000 to 500,000,000 and the number of authorized
shares  of FBS  preferred stock from  10,000,000 to  15,000,000. The Certificate
Amendments (collectively with  the Proposed  Issuance, the  "FBS Vote  Matters")
will  become  effective  immediately prior  to  or  at the  effective  time (the
"Effective Time") of the  Merger. Approval of  each of the  FBS Vote Matters  is
contingent upon the approval of each of the other FBS Vote Matters.

    This  Joint Proxy Statement/Prospectus also is being furnished to holders of
the common stock, $2.00  par value ("First Interstate  Common Stock"), of  First
Interstate  Bancorp, a Delaware corporation  ("First Interstate"), in connection
with the solicitation of proxies by  the Board of Directors of First  Interstate
(the "First Interstate Board") for use at the special meeting of shareholders of
First  Interstate  (including  any adjournments  or  postponements  thereof, the
"First Interstate Special Meeting") to be held on           , 1996, at     a.m.,
local time at                . At the First Interstate Special Meeting,  holders
of  First  Interstate Common  Stock will  be asked  to consider  and act  upon a
proposal to approve  and adopt the  Agreement and  Plan of Merger,  dated as  of
November  5, 1995 (the "Merger Agreement"), by and among FBS, Eleven Acquisition
Corp., a wholly  owned subsidiary  of FBS  and a  Delaware corporation  ("Merger
Sub"),  and First Interstate, providing for, among other things, the merger (the
"Merger") of Merger  Sub with  and into  First Interstate.  As a  result of  the
Merger,  First Interstate  will become  a wholly  owned subsidiary  of New First
Interstate. A copy of the Merger Agreement is attached hereto as Appendix A  and
is  incorporated herein by reference.  This Joint Proxy Statement/Prospectus may
be used  by FBS  in  discussions with  First  Interstate shareholders  that  may
constitute the solicitation of proxies.

    This  Joint Proxy Statement/Prospectus also  constitutes a prospectus of FBS
with respect to the  securities of New First  Interstate issuable to holders  of
First  Interstate Capital  Stock (as  defined herein)  upon consummation  of the
Merger. Copies of this Joint Proxy Statement/Prospectus also are being furnished
to the holders of the First Interstate Preferred Stock and the First  Interstate
Depositary  Shares (each as defined herein),  but proxies are not being solicted
from such holders and such holders are not entitled, and are not being asked, to
vote at the First Interstate Special Meeting.
                            ------------------------    (CONTINUED ON NEXT PAGE)

THE SECURITIES OFFERED  HEREBY HAVE NOT  BEEN APPROVED OR  DISAPPROVED BY  THE
  SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR
     HAS  THE SECURITIES AND EXCHANGE  COMMISSION OR ANY STATE SECURITIES
       COMMISSION PASSED UPON THE ACCURACY  OR ADEQUACY OF THIS  JOINT
          PROXY STATEMENT/PROSPECTUS. ANY REPRESENTATION         TO
                      THE CONTRARY IS A CRIMINAL OFFENSE.

THE  SECURITIES OFFERED  HEREBY ARE  NOT SAVINGS  ACCOUNTS, DEPOSITS  OR OTHER
  OBLIGATIONS OF ANY BANK OR SAVINGS ASSOCIATION AND ARE NOT INSURED BY  THE
    FEDERAL  DEPOSIT INSURANCE  CORPORATION, THE BANK  INSURANCE FUND, THE
      SAVINGS  ASSOCIATION  INSURANCE  FUND  OR  ANY  OTHER  GOVERNMENTAL
                                    AGENCY.

   
    THE DATE OF THIS JOINT PROXY STATEMENT/PROSPECTUS IS            , 1996.
    
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)

    Upon  consummation  of  the  Merger, (i)  each  outstanding  share  of First
Interstate Common Stock, other than  shares held in First Interstate's  treasury
or  directly or indirectly by FBS or  its subsidiaries or by First Interstate or
its subsidiaries (except in both cases for shares ("Trust Account Shares")  held
for  others in trust or in a fiduciary  or custodial capacity or in respect of a
debt previously contracted)  will be converted  into the right  to receive  2.60
shares  of New First  Interstate Common Stock (the  "Exchange Ratio"), with cash
being paid in lieu  of fractional shares, (ii)  each outstanding share of  First
Interstate 9.875% preferred stock, Series F, $200 liquidation preference ("First
Interstate 9.875% Preferred Stock"), will be converted into the right to receive
one  share of New First Interstate 9.875% preferred stock, par value $1.00 ("New
First Interstate 9.875% Preferred  Stock") and (iii)  each outstanding share  of
First  Interstate 9.0%  preferred stock,  Series G,  $200 liquidation preference
("First Interstate  9.0%  Preferred  Stock" and,  collectively  with  the  First
Interstate 9.875% Preferred Stock, "First Interstate Preferred Stock"; the First
Interstate   Common  Stock  and   the  First  Interstate   Preferred  Stock  are
collectively referred to herein as  the "First Interstate Capital Stock"),  will
be  converted into the right  to receive one share  of New First Interstate 9.0%
preferred stock, par value  $1.00 ("New First  Interstate 9.0% Preferred  Stock"
and, collectively with the New First Interstate 9.875% Preferred Stock, the "New
First  Interstate  Preferred  Stock").  The  terms,  designations,  preferences,
limitations, privileges  and  rights  of  the respective  series  of  New  First
Interstate  Preferred  Stock will  be  substantially the  same  as those  of the
corresponding series of First Interstate Preferred Stock. As in the case of  the
First  Interstate Preferred Stock, each share  of New First Interstate Preferred
Stock will  be  represented by  depositary  shares (the  "New  First  Interstate
Depositary  Shares"), each representing a one-eighth  interest in a share of New
First Interstate Preferred Stock.

   
    The FBS Common Stock,  First Interstate Common  Stock and depositary  shares
("First   Interstate  Depositary  Shares")  representing  the  First  Interstate
Preferred Stock are,  and the New  First Interstate Common  Stock and New  First
Interstate  Depositary Shares to be outstanding after the Merger will be, listed
on the New York Stock Exchange (the  "NYSE"). The last reported sales prices  of
FBS  Common Stock (NYSE  Symbol: "FBS") and First  Interstate Common Stock (NYSE
Symbol: "I") on the  NYSE Composite Tape  on December 27,  1995 were $50.25  and
$136.00  per share, respectively. Based on such  last reported sale price of the
FBS Common Stock,  the Exchange  Ratio would result  in an  indicated per  share
purchase   price  for  the  First  Interstate   Common  Stock  of  $130.65.  See
"Summary--Markets and Market Prices." Because the Exchange Ratio is fixed,  each
change  in the market price  of FBS Common Stock  before the Effective Time will
affect the implied market value of the  New First Interstate Common Stock to  be
received  in the Merger in exchange for the First Interstate Common Stock. THERE
CAN BE NO ASSURANCE AS TO THE MARKET  PRICE OF THE FBS COMMON STOCK AT ANY  TIME
PRIOR  TO  THE EFFECTIVE  TIME  OR AS  TO  THE MARKET  PRICES  OF THE  NEW FIRST
INTERSTATE COMMON STOCK OR  NEW FIRST INTERSTATE DEPOSITARY  SHARES AT ANY  TIME
THEREAFTER. Shareholders are urged to obtain current market quotations.
    

   
    All  references to the FBS Common Stock  and the New First Interstate Common
Stock in this  Joint Proxy  Statement/Prospectus include  the associated  rights
("FBS  Rights" and, after the Merger, "New First Interstate Rights") to purchase
shares of FBS's  Series A  junior participating  preferred stock  pursuant to  a
Rights  Agreement, dated as of December 21,  1988, between FBS and First Chicago
Trust Company  of  New  York, as  rights  agent,  as amended  (the  "FBS  Rights
Agreement"  and, after the Merger, the "New First Interstate Rights Agreement").
All references  to  the  First  Interstate Common  Stock  in  this  Joint  Proxy
Statement/Prospectus  include the associated First Interstate Rights (as defined
herein) to  purchase  First  Interstate  Common  Stock  pursuant  to  the  First
Interstate Rights Agreement (as defined herein).
    

   
    This  Joint Proxy Statement/Prospectus and the accompanying forms of proxies
for  the  FBS  Special  Meeting   and  the  First  Interstate  Special   Meeting
(collectively  with the FBS  Special Meeting, the  "Special Meetings") are first
being mailed  to  the shareholders  of  FBS and  First  Interstate on  or  about
            , 1996.
    

    This  Joint Proxy Statement/Prospectus is included as part of a registration
statement on  Form  S-4 (together  with  all amendments  and  exhibits  thereto,
including documents and information incorporated by reference, the "Registration
Statement") filed with the Securities and Exchange Commission (the "Commission")
by  FBS,  relating to  the registration  under  the Securities  Act of  1933, as
amended (the  "Securities  Act"), of  up  to  207,480,000 shares  of  New  First
Interstate  Common  Stock, 1,750,000  shares of  New First  Interstate Preferred
Stock and 14,000,000  New First  Interstate Depositary  Shares to  be issued  in
connection with the Merger.

                                       2
<PAGE>
                             AVAILABLE INFORMATION

    FBS  and First Interstate  are subject to  the informational requirements of
the Securities Exchange Act  of 1934, as amended  (the "Exchange Act"), and,  in
accordance  therewith, file reports, proxy statements and other information with
the Commission. Reports, proxy statements  and other information concerning  FBS
and  First  Interstate  can be  inspected  and  copied at  the  public reference
facilities of the Commission at 450 Fifth Street, N.W., Washington, D.C.  20549,
and  at  the Commission's  Regional Offices  at Seven  World Trade  Center, 13th
Floor, New  York,  New York  10048  and  Citicorp Center,  500  Madison  Street,
Chicago,  Illinois 60661. Copies of such materials also can be obtained from the
Public  Reference  Section  of  the  Commission  at  450  Fifth  Street,   N.W.,
Washington,  D.C.  20549,  at  prescribed  rates.  In  addition,  reports, proxy
statements and  other information  concerning FBS  and First  Interstate can  be
inspected at the offices of the NYSE, 20 Broad Street, New York, New York 10005.

    FBS  has  filed the  Registration Statement  with  the Commission  under the
Securities Act relating to the shares  of New First Interstate Common Stock  and
New  First Interstate  Preferred Stock and  the New  First Interstate Depositary
Shares  to  be  issued  in  connection   with  the  Merger.  This  Joint   Proxy
Statement/Prospectus  does  not contain  all the  information  set forth  in the
Registration Statement, certain parts  of which are  omitted in accordance  with
the  rules and regulations of the  Commission. Such information may be inspected
and copied as set forth above. For further information, reference is hereby made
to  the  Registration  Statement.  Statements  contained  in  this  Joint  Proxy
Statement/  Prospectus as  to the contents  of any document  are not necessarily
complete, and in each instance reference  is made to such document itself,  each
such statement being qualified in all respects by such reference.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
    THIS  JOINT PROXY  STATEMENT/PROSPECTUS INCORPORATES  DOCUMENTS BY REFERENCE
WHICH ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. DOCUMENTS RELATING TO  FBS
(EXCLUDING  EXHIBITS UNLESS SPECIFICALLY INCORPORATED  THEREIN) ARE AVAILABLE TO
EACH PERSON, INCLUDING ANY BENEFICIAL OWNER, TO WHOM A COPY OF THIS JOINT  PROXY
STATEMENT/PROSPECTUS  IS DELIVERED, WITHOUT CHARGE, UPON WRITTEN OR ORAL REQUEST
TO KARIN E.  GLASGOW, INVESTOR RELATIONS,  FIRST BANK SYSTEM,  INC., FIRST  BANK
PLACE,  601 SECOND  AVENUE SOUTH,  MINNEAPOLIS, MINNESOTA  55402-4302, TELEPHONE
NUMBER  (612)  973-2264.  DOCUMENTS  RELATING  TO  FIRST  INTERSTATE  (EXCLUDING
EXHIBITS UNLESS SPECIFICALLY INCORPORATED THEREIN) ARE AVAILABLE TO EACH PERSON,
INCLUDING   ANY  BENEFICIAL  OWNER,   TO  WHOM  A  COPY   OF  THIS  JOINT  PROXY
STATEMENT/PROSPECTUS IS DELIVERED, WITHOUT CHARGE, UPON WRITTEN OR ORAL  REQUEST
TO  DAVID S. BELLES,  EXECUTIVE VICE PRESIDENT  AND CONTROLLER, FIRST INTERSTATE
BANCORP, P.O. BOX  29791, PHOENIX,  ARIZONA 85038-9791,  TELEPHONE NUMBER  (602)
949-4019.  IN  ORDER TO  ENSURE TIMELY  DELIVERY OF  THE DOCUMENTS,  ANY REQUEST
SHOULD BE  RECEIVED NO  LATER THAN  [FIVE BUSINESS  DAYS BEFORE  THE  RESPECTIVE
MEETING DATE].
    

   
    The  following documents that have been filed by FBS with the Commission are
hereby incorporated by reference in  this Joint Proxy Statement/Prospectus:  (i)
Annual  Report on Form 10-K for the year ended December 31, 1994; (ii) quarterly
reports on Form 10-Q for  the quarters ended March 31,  1995, June 30, 1995  and
September  30, 1995; (iii) Current  Reports on Form 8-K  filed March 3, 1995 (as
amended by Amendment No. 1 on Form  8-K/A filed March 7, 1995), April 13,  1995,
April  25, 1995, July 6, 1995, August 18, 1995 (as amended by Amendment No. 1 on
Form 8-K/A  filed August  30,  1995 and  Amendment No.  2  on Form  8-K/A  filed
November  15, 1995),  September 11, 1995,  November 13, 1995,  November 16, 1995
(two Reports), December 13, 1995 and  December 15, 1995; (iv) Current Report  on
Form  8-K/A filed February 13, 1995 (constituting Amendment No. 4 to the Current
Report on Form  8-K filed August  5, 1994);  (v) the description  of FBS  Common
Stock  contained in Item 1  of the FBS Registration  Statement on Form 8-A dated
March 19,  1984, as  amended in  its entirety  by that  Form 8  Amendment  dated
February 26, 1993 and that Form 8-A/A-2 dated October 6, 1994, and any amendment
or report filed for the purpose of updating such description filed subsequent to
the  date of this Joint Proxy  Statement/Prospectus and prior to the termination
of the  offering  described herein;  and  (vi)  the description  of  the  Rights
contained in Item 1 of the FBS Registration Statement on Form 8-A dated December
21, 1988, as amended by that Form 8 Amendment dated June 11, 1990, as amended in
its  entirety by that  Form 8 Amendment  dated February 26,  1993 and as further
amended by  that Form  8-A/A-3 filed  November 16,  1995, and  any amendment  or
report  filed for the  purpose of updating such  description filed subsequent to
the date of this Joint Proxy  Statement/Prospectus and prior to the  termination
of the offering described herein.
    

                                       3
<PAGE>
    The  following documents that  have been filed by  First Interstate with the
Commission  are  hereby   incorporated  by   reference  in   this  Joint   Proxy
Statement/Prospectus: (i) Annual Report on Form 10-K for the year ended December
31,  1994; (ii) quarterly reports on Form  10-Q for the quarters ended March 31,
1995, June 30, 1995 and  September 30, 1995; (iii)  Current Reports on Form  8-K
dated  February 17,  1995, March  24, 1995,  May 1,  1995, November  9, 1995 and
November 15, 1995 and on Form 8-K/A dated May 26, 1995; (iv) the description  of
First  Interstate Common  Stock contained  in the  First Interstate Registration
Statement on Form 10/A dated August 3,  1993, and any amendment or report  filed
for  the purpose of  updating such description  filed subsequent to  the date of
this Joint  Proxy  Statement/Prospectus and  prior  to the  termination  of  the
offering  described herein; and (v) the description of the common stock purchase
rights contained in  Item 1 of  the First Interstate  Registration Statement  on
Form  8-A dated November 23, 1988, as  amended by that Form 8-A/A dated November
15, 1995 and any amendment or report updating such description filed  subsequent
to  the  date  of  this  Joint  Proxy  Statement/Prospectus  and  prior  to  the
termination of the offering described herein.

    All documents filed by FBS or  First Interstate pursuant to Sections  13(a),
13(c),  14 or 15(d) of  the Exchange Act after the  date hereof and before their
respective Special  Meetings  shall  be  deemed to  be  incorporated  herein  by
reference and to be a part hereof from the date of filing of such documents. Any
statement  contained  herein  or in  a  document  incorporated or  deemed  to be
incorporated by reference herein  shall be deemed to  be modified or  superseded
for  purposes of  this Joint  Proxy Statement/ Prospectus  to the  extent that a
statement contained herein or in  another subsequently filed document that  also
is  or is deemed to  be incorporated by reference  herein modifies or supersedes
such statement. Any  statement so modified  or superseded shall  not be  deemed,
except  as so modified or  superseded, to constitute a  part of this Joint Proxy
Statement/Prospectus.

    NO  PERSON  IS  AUTHORIZED   TO  GIVE  ANY  INFORMATION   OR  TO  MAKE   ANY
REPRESENTATION  NOT  CONTAINED  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS  OR
INCORPORATED BY REFERENCE HEREIN IN CONNECTION WITH THE SOLICITATION OF  PROXIES
AND  THE  OFFERING  MADE HEREBY  AND,  IF  GIVEN OR  MADE,  SUCH  INFORMATION OR
REPRESENTATION SHOULD NOT  BE RELIED UPON  AS HAVING BEEN  AUTHORIZED BY FBS  OR
FIRST INTERSTATE.

    THIS  JOINT PROXY STATEMENT/PROSPECTUS DOES  NOT CONSTITUTE THE SOLICITATION
OF A PROXY, OR AN OFFER  TO SELL OR A SOLICITATION  OF AN OFFER TO PURCHASE  ANY
SECURITIES  BY ANYONE IN  ANY STATE IN  WHICH SUCH OFFER  OR SOLICITATION IS NOT
AUTHORIZED OR  IN WHICH  THE PERSON  MAKING SUCH  OFFER OR  SOLICITATION IS  NOT
QUALIFIED TO DO SO OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION.

    THIS  JOINT PROXY STATEMENT/PROSPECTUS DOES NOT  COVER ANY RESALES OF SHARES
OF NEW FIRST INTERSTATE COMMON STOCK OR NEW FIRST INTERSTATE PREFERRED STOCK  OR
NEW  FIRST  INTERSTATE  DEPOSITARY  SHARES  OFFERED  HEREBY  TO  BE  RECEIVED BY
SHAREHOLDERS OF FIRST INTERSTATE DEEMED  TO BE "AFFILIATES" OF FIRST  INTERSTATE
OR  NEW  FIRST INTERSTATE  UPON THE  CONSUMMATION  OF THE  MERGER. NO  PERSON IS
AUTHORIZED TO MAKE USE  OF THIS JOINT  PROXY STATEMENT/PROSPECTUS IN  CONNECTION
WITH ANY SUCH RESALES.

    NEITHER  THE  DELIVERY  OF  THIS JOINT  PROXY  STATEMENT/PROSPECTUS  NOR ANY
DISTRIBUTION OF SECURITIES  MADE HEREUNDER SHALL  IMPLY THAT THERE  HAS BEEN  NO
CHANGE  IN THE INFORMATION  SET FORTH HEREIN OR  IN THE AFFAIRS  OF FBS OR FIRST
INTERSTATE SINCE THE DATE HEREOF OR THAT THE INFORMATION HEREIN IS CORRECT AS OF
ANY TIME SUBSEQUENT TO ITS DATE.  FBS HAS SUPPLIED ALL INFORMATION CONTAINED  IN
THIS  JOINT PROXY STATEMENT/PROSPECTUS RELATING TO FBS AND ITS SUBSIDIARIES, AND
FIRST INTERSTATE  HAS SUPPLIED  ALL INFORMATION  CONTAINED IN  THIS JOINT  PROXY
STATEMENT/PROSPECTUS RELATING TO FIRST INTERSTATE AND ITS SUBSIDIARIES.

FOR NORTH CAROLINA RESIDENTS:

    THE  COMMISSIONER  OF  INSURANCE OF  THE  STATE  OF NORTH  CAROLINA  HAS NOT
APPROVED OR DISAPPROVED THIS OFFERING NOR  HAS THE COMMISSIONER PASSED UPON  THE
ACCURACY OR ADEQUACY OF THIS JOINT PROXY STATEMENT/PROSPECTUS.

                                       4
<PAGE>
                               TABLE OF CONTENTS

   
<TABLE>
<S>                                                                                     <C>
AVAILABLE INFORMATION.................................................................          3
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.......................................          3
SUMMARY...............................................................................          7
  The Parties to the Merger...........................................................          7
  Effects of the Merger...............................................................          7
  Effective Time......................................................................          8
  Conversion of First Interstate Capital Stock; First Interstate Options..............          8
  Effects on FBS Shareholders.........................................................          8
  The Special Meetings................................................................          8
  Votes Required......................................................................          9
  Recommendation of the FBS Board.....................................................         10
  Recommendation of the First Interstate Board........................................         10
  Certain Anticipated Benefits of the Merger..........................................         10
  Interests of Certain Persons in the Merger..........................................         10
  Opinion of FBS Financial Advisor....................................................         13
  Opinions of First Interstate Financial Advisors.....................................         13
  Business Pending Consummation of the Merger.........................................         13
  Regulatory Approvals Required.......................................................         14
  Conditions to Consummation of the Merger............................................         14
  Termination of the Merger Agreement.................................................         14
  Termination Fees....................................................................         14
  Stock Option Agreements.............................................................         15
  Certain Federal Income Tax Consequences.............................................         17
  No Appraisal Rights.................................................................         17
  Accounting Treatment................................................................         17
  Markets and Market Prices...........................................................         17
  Differences in Rights of Shareholders...............................................         18
  Dividends...........................................................................         18
  Expenses............................................................................         18
  Wells Exchange Offer................................................................         19
  Comparison of the Merger and the Wells Offer........................................         19
COMPARATIVE UNAUDITED PER SHARE DATA..................................................         20
SELECTED HISTORICAL AND UNAUDITED PRO FORMA FINANCIAL DATA............................         22
NEW FIRST INTERSTATE FORECASTED CONSOLIDATED STATEMENT OF OPERATIONS..................         29
INFORMATION CONCERNING THE FBS SPECIAL MEETING........................................         32
INFORMATION CONCERNING THE FIRST INTERSTATE SPECIAL MEETING...........................         34
THE MERGER............................................................................         37
  General.............................................................................         37
  Effective Time......................................................................         37
  Background of the Merger............................................................         37
  Reasons of FBS for the Merger; Recommendation of FBS Board..........................         43
  Reasons of First Interstate for the Merger; Recommendation of First Interstate
   Board..............................................................................         46
  Opinion of FBS Financial Advisor....................................................         50
  Opinions of First Interstate Financial Advisors.....................................         54
  Comparison of the Merger and the Wells Offer........................................         64
  Conversion of First Interstate Capital Stock; Effects on FBS Shareholders...........         64
  Exchange of Certificates and Depositary Receipts; Fractional Shares.................         65
  Representations and Warranties......................................................         66
  Conduct of Business Pending the Merger and Other Agreements.........................         67
  Conditions to the Consummation of the Merger........................................         69
  Regulatory Approvals Required.......................................................         70
  Termination of the Merger Agreement.................................................         76
</TABLE>
    

                                       5
<PAGE>
   
<TABLE>
<S>                                                                                     <C>
  Termination Fees....................................................................         76
  Stock Option Agreements.............................................................         78
  Amendments to Rights Agreements.....................................................         82
  Accounting Treatment................................................................         82
  No Appraisal Rights.................................................................         83
  Extension, Waiver and Amendment of the Merger Agreement.............................         83
  Management and Operations of New First Interstate Following the Merger..............         83
  Interests of Certain Persons in the Merger..........................................         85
  Certain Federal Income Tax Consequences.............................................         89
  Stock Exchange Listing of New First Interstate Common Stock and New First Interstate
   Depositary Shares..................................................................         90
  Resale of New First Interstate Common Stock and New First Interstate Depositary
   Shares Received by First Interstate Shareholders...................................         91
  FBS Dividend Reinvestment and Common Stock Purchase Plan............................         91
  Expenses............................................................................         92
  Certain Litigation..................................................................         92
  Material Differences in Rights of Shareholders of First Interstate and New First
   Interstate.........................................................................         95
  Dividends...........................................................................         97
FIRST BANK SYSTEM, INC................................................................         97
  Business of FBS.....................................................................         97
  FBS Stock Repurchase Program........................................................         98
BUSINESS OF FIRST INTERSTATE..........................................................         99
DESCRIPTION OF FBS AND NEW FIRST INTERSTATE CAPITAL STOCK.............................        100
  General.............................................................................        100
  Preferred Stock.....................................................................        101
  Common Stock........................................................................        103
  New First Interstate Preferred Stock................................................        106
  New First Interstate 9.875% Preferred Stock.........................................        106
  New First Interstate 9.0% Preferred Stock...........................................        110
  New First Interstate Depositary Shares..............................................        111
AMENDMENTS TO NEW FIRST INTERSTATE CERTIFICATE OF INCORPORATION.......................        114
LEGAL OPINIONS........................................................................        115
EXPERTS...............................................................................        116
INDEPENDENT PUBLIC ACCOUNTANTS........................................................        116
SHAREHOLDER PROPOSALS.................................................................        116
MANAGEMENT AND ADDITIONAL INFORMATION.................................................        117
UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION..........................        F-1
APPENDIX A -- AGREEMENT AND PLAN OF MERGER............................................        A-1
APPENDIX B -- STOCK OPTION AGREEMENT, DATED AS OF NOVEMBER 5, 1995, BETWEEN FIRST
 INTERSTATE BANCORP AND FIRST BANK SYSTEM, INC........................................        B-1
APPENDIX C -- STOCK OPTION AGREEMENT, DATED AS OF NOVEMBER 5, 1995, BETWEEN FIRST BANK
 SYSTEM, INC. AND FIRST INTERSTATE BANCORP............................................        C-1
APPENDIX D -- TERMINATION FEE LETTER, DATED AS OF NOVEMBER 5, 1995, BETWEEN FIRST BANK
 SYSTEM, INC. AND FIRST INTERSTATE BANCORP............................................        D-1
APPENDIX E -- TERMINATION FEE LETTER, DATED AS OF NOVEMBER 5, 1995, BETWEEN FIRST
 INTERSTATE BANCORP AND FIRST BANK SYSTEM, INC........................................        E-1
APPENDIX F -- OPINION OF J.P. MORGAN SECURITIES INC...................................        F-1
APPENDIX G -- OPINION AND LETTER OF GOLDMAN, SACHS & CO...............................        G-1
APPENDIX H -- OPINIONS OF MORGAN STANLEY & CO. INCORPORATED...........................        H-1
</TABLE>
    

                                       6
<PAGE>
                                    SUMMARY

    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ALL  RESPECTS BY  THE MORE DETAILED
INFORMATION INCLUDED IN  THIS JOINT PROXY  STATEMENT/PROSPECTUS, THE  APPENDICES
HERETO  AND  THE DOCUMENTS  INCORPORATED HEREIN  BY REFERENCE.  SHAREHOLDERS ARE
URGED TO READ CAREFULLY THE  ENTIRE JOINT PROXY STATEMENT/PROSPECTUS,  INCLUDING
THE  APPENDICES. AS  USED IN  THIS JOINT  PROXY STATEMENT/PROSPECTUS,  THE TERMS
"FBS" AND  "FIRST  INTERSTATE"  REFER  TO FIRST  BANK  SYSTEM,  INC.  AND  FIRST
INTERSTATE  BANCORP, RESPECTIVELY, AND,  WHERE THE CONTEXT  SO REQUIRES, TO SUCH
CORPORATIONS AND THEIR RESPECTIVE SUBSIDIARIES. THE TERM "NEW FIRST  INTERSTATE"
REFERS TO FBS AFTER THE MERGER AND, WHERE THE CONTEXT SO REQUIRES, TO IT AND ITS
SUBSIDIARIES.  CERTAIN CAPITALIZED TERMS  THAT ARE USED BUT  NOT DEFINED IN THIS
SUMMARY ARE DEFINED ELSEWHERE IN THIS JOINT PROXY STATEMENT/PROSPECTUS.

THE PARTIES TO THE MERGER

   
    FBS.   FBS is  a bank  holding  company registered  under the  Bank  Holding
Company  Act of 1956, as amended  (the "BHC Act"), headquartered in Minneapolis,
Minnesota. At September 30,  1995, FBS owned eight  subsidiary banks, a  savings
association and other financial companies with 350 offices, located primarily in
Minnesota,  Colorado, Illinois, Montana, North  Dakota, South Dakota, Wisconsin,
Iowa, Nebraska,  Kansas  and Wyoming.  Through  its subsidiaries,  FBS  provides
commercial  and agricultural finance, consumer  banking, trust, capital markets,
treasury management, investment management,  data processing, leasing,  mortgage
banking  and brokerage services. At September 30, 1995, FBS and its consolidated
subsidiaries had consolidated assets of $33.0 billion, consolidated deposits  of
$21.9 billion and shareholders' equity of $2.7 billion.
    

   
    For  further information  concerning FBS,  see "First  Bank System,  Inc. --
Business of  FBS" and  "Selected Historical  and Unaudited  Pro Forma  Financial
Data" herein and the FBS documents incorporated by reference herein as described
under "Incorporation of Certain Documents by Reference." The principal executive
offices  of  FBS are  located  at First  Bank  Place, 601  Second  Avenue South,
Minneapolis, Minnesota 55402-4302 (telephone number (612) 973-1111).
    

    FIRST INTERSTATE.   First Interstate  is a bank  holding company  registered
under  the BHC  Act headquartered in  Los Angeles, California.  At September 30,
1995, First Interstate, through its 16 subsidiary banks, operated  approximately
1,150 banking offices in California, Arizona, Oregon, Texas, Washington, Nevada,
Colorado,  Idaho, Utah,  Wyoming, Montana,  New Mexico  and Alaska.  Through its
subsidiaries,  First  Interstate  provides   commercial  and  consumer   banking
services,  trust  services  and  other  banking-related  financial  services and
products, including  asset-based  commercial  financing,  asset  management  and
investment  counseling, bank card operations,  mortgage banking, venture capital
and investment  products.  At  September  30, 1995,  First  Interstate  and  its
consolidated subsidiaries had consolidated assets of $55.1 billion, consolidated
deposits of $48.2 billion and shareholders' equity of $4.0 billion.

    For  further information concerning First Interstate, see "Business of First
Interstate" and "Selected  Historical and  Unaudited Pro  Forma Financial  Data"
herein  and the First  Interstate documents incorporated  by reference herein as
described under "Incorporation of Certain Documents by Reference." The principal
executive offices of First Interstate are located at 633 West Fifth Street,  Los
Angeles, California 90071 (telephone number (213) 614-3001).

EFFECTS OF THE MERGER

    Pursuant  to the Merger Agreement, at the Effective Time, Merger Sub will be
merged with and into  First Interstate, with First  Interstate as the  surviving
corporation  (the "Surviving  Corporation") under  the name  "Eleven Acquisition
Corp." The Surviving Corporation will be a wholly owned subsidiary of New  First
Interstate. See "The Merger -- General."

    For  information  on  how  First Interstate  shareholders  will  be  able to
exchange certificates representing shares of  First Interstate Common Stock  and
depositary  receipts  (the  "First Interstate  Depositary  Receipts") evidencing
First  Interstate   Depositary   Shares  for   certificates   representing   the

                                       7
<PAGE>
   
shares  of New First  Interstate Common Stock and  depositary receipts (the "New
First  Interstate  Depositary   Receipts")  evidencing   New  First   Interstate
Depositary  Shares  to be  issued  to them  in the  Merger,  see "The  Merger --
Exchange of Certificates and Depositary Receipts; Fractional Shares."
    

EFFECTIVE TIME

    Subject to the terms and conditions  of the Merger Agreement, the  Effective
Time  will occur on a date no later  than two business days after the conditions
to the consummation of the Merger have been satisfied or waived. Such conditions
relate generally to the approval of the Merger Agreement by the shareholders  of
First Interstate and the approval of the FBS Vote Matters by the shareholders of
FBS,  receipt of the Requisite Regulatory Approvals and third party consents and
the listing on the NYSE of the  shares of New First Interstate Common Stock  and
New  First  Interstate  Depositary  Shares.  Subject  to  the  foregoing,  it is
currently anticipated that the Merger will be consummated by
1996.  See "The Merger -- Effective Time"  and "-- Conditions to Consummation of
the Merger."

CONVERSION OF FIRST INTERSTATE CAPITAL STOCK; FIRST INTERSTATE OPTIONS

    Upon consummation  of  the  Merger,  (i) each  outstanding  share  of  First
Interstate  Common Stock, other than shares  held in First Interstate's treasury
or directly or indirectly by FBS or  its subsidiaries or by First Interstate  or
its  subsidiaries (except,  in both  cases, for  Trust Account  Shares), will be
converted into the right to receive  2.60 shares of New First Interstate  Common
Stock,  with cash being paid in lieu of fractional shares, (ii) each outstanding
share of First  Interstate 9.875%  Preferred Stock  will be  converted into  the
right  to receive one share  of New First Interstate  9.875% Preferred Stock and
(iii) each outstanding share  of First Interstate 9.0%  Preferred Stock will  be
converted  into the  right to  receive one  share of  New First  Interstate 9.0%
Preferred Stock. The terms,  designations, preferences, limitations,  privileges
and rights of the respective series of New First Interstate Preferred Stock will
be  substantially  the  same  as  those of  the  corresponding  series  of First
Interstate Preferred Stock. See  "The Merger --  Conversion of First  Interstate
Capital  Stock; Effects on FBS Shareholders,"  "-- Certain Differences in Rights
of Shareholders of First Interstate  and New First Interstate" and  "Description
of FBS and "New First Interstate Capital Stock."

    Upon  consummation of  the Merger, each  option to purchase  shares of First
Interstate Common Stock (each a "First Interstate Stock Option") issued by First
Interstate pursuant to  any of its  employee or director  stock option  programs
(each  a  "First Interstate  Stock Plan")  that  is outstanding  and unexercised
immediately prior to the Effective Time will be converted automatically into  an
option  to purchase  shares of  New First Interstate  Common Stock  (each a "New
First Interstate Option"). The number of  shares of New First Interstate  Common
Stock subject to the New First Interstate Option will be equal to the product of
the  number  of shares  of First  Interstate Common  Stock underlying  the First
Interstate Stock Option multiplied by the Exchange Ratio and rounded down to the
nearest share, and the exercise price  per share of New First Interstate  Common
Stock  subject to the New First Interstate  Option will be equal to the exercise
price per share of First Interstate Common Stock underlying the First Interstate
Stock Option divided by the Exchange Ratio  and rounded up to the nearest  cent.
See  "The Merger -- Conversion of First Interstate Capital Stock; Effects on FBS
Shareholders."

EFFECTS ON FBS SHAREHOLDERS

    At the Effective Time, (i)  each share of FBS  Common Stock then issued  and
outstanding  will continue as one share of New First Interstate Common Stock and
(ii) each share of FBS Series 1991A Convertible Preferred Stock, $1.00 par value
("FBS 1991A Preferred Stock") then issued  and outstanding will continue as  one
share  of preferred stock of New First Interstate. See "The Merger -- Conversion
of First Interstate Capital Stock; Effects on FBS Shareholders."

THE SPECIAL MEETINGS

    FBS SPECIAL MEETING.  The FBS Special Meeting to consider and vote upon  the
FBS Vote Matters will be held at
                                                              , Minneapolis,

                                       8
<PAGE>
Minnesota,  on              , 1996, at   a.m. local time. Only holders of record
of FBS Common Stock at the  close of business on               (the "FBS  Record
Date")  will be entitled to notice of and to vote at the FBS Special Meeting. At
the close  of  business on  the  FBS Record  Date,  there were  outstanding  and
entitled  to vote         shares of  FBS Common Stock. Each  share of FBS Common
Stock is entitled to one vote on each of the FBS Vote Matters. See  "Information
Concerning the FBS Special Meeting."

    FIRST  INTERSTATE SPECIAL MEETING.  The  First Interstate Special Meeting to
consider and vote upon the approval and adoption of the Merger Agreement and the
transactions contemplated thereby will be held at                , Los  Angeles,
California,  on              , 1996 at   a.m. local time. Only holders of record
of First Interstate Common Stock at the close  of business on               (the
"First Interstate Record Date") will be entitled to notice of and to vote at the
First  Interstate  Special  Meeting.  At  the close  of  business  on  the First
Interstate Record Date, there were outstanding and entitled to vote       shares
of First Interstate Common Stock. Each share of First Interstate Common Stock is
entitled to one vote on  the approval and adoption  of the Merger Agreement  and
the  transactions contemplated  thereby. See  "Information Concerning  the First
Interstate Special Meeting."

VOTES REQUIRED

    FBS VOTES REQUIRED.  Under NYSE  rules, the Proposed Issuance of FBS  Common
Stock contemplated by the Merger Agreement must be approved by a majority of the
votes  cast on  such proposal at  the FBS Special  Meeting, and over  50% of the
shares of FBS Common Stock entitled to do so must in fact vote on such  proposal
at  the  FBS  Special  Meeting.  Pursuant  to  Delaware  law,  approval  of  the
Certificate Amendments to increase  the authorized capital stock  of FBS and  to
change its name to "First Interstate Bancorp" requires the affirmative vote of a
majority  of all shares of FBS Common  Stock outstanding and entitled to vote at
the FBS Special Meeting. Approval of each of the FBS Vote Matters is  contingent
upon  the  approval of  each of  the  other FBS  Vote Matters  and, accordingly,
approval of the FBS Vote Matters will require the affirmative vote of a majority
of all shares of FBS  Common Stock outstanding and entitled  to vote at the  FBS
Special  Meeting. Approval of the FBS Vote Matters by the requisite votes of the
holders of FBS Common Stock  is a condition to  the consummation of the  Merger.
Holders  of shares of FBS 1991A Preferred Stock  are not entitled to and are not
being requested to vote at the FBS Special Meeting.

    It is expected that all of the        shares of FBS Common Stock  (excluding
shares  subject to stock options) beneficially  owned by directors and executive
officers of FBS and their affiliates  at the FBS Record Date  (  % of the  total
number of outstanding shares of FBS Common Stock at such date) will be voted for
approval  of the FBS Vote  Matters. As of the  FBS Record Date, First Interstate
beneficially owned        shares of FBS Common Stock (excluding shares  issuable
to  First Interstate under certain circumstances  as described under "The Merger
- -- Stock  Option Agreements"),  and directors  and executive  officers of  First
Interstate  beneficially owned  less than  1% of  the outstanding  shares of FBS
Common Stock. See "Information Concerning the FBS Special Meeting."

   
    FIRST INTERSTATE VOTES  REQUIRED.   Pursuant to Delaware  law, approval  and
adoption  of the Merger Agreement requires the affirmative vote of a majority of
all shares of First Interstate Common Stock outstanding and entitled to vote  at
the  First Interstate Special  Meeting. The approval and  adoption of the Merger
Agreement and the transactions contemplated thereby by the requisite vote of the
holders of the First Interstate Common Stock is a condition to the  consummation
of  the Merger. Holders of First Interstate Preferred Stock and First Interstate
Depositary Shares are not entitled to and are not being requested to vote on the
approval and adoption of the Merger Agreement and the transactions  contemplated
thereby.
    

    It is expected that all of the       shares of First Interstate Common Stock
(excluding  shares subject to stock options) beneficially owned by directors and
executive officers  of  First  Interstate  and their  affiliates  at  the  First
Interstate  Record Date (  % of the  total number of outstanding shares of First
Interstate Common Stock at such date) will be voted for approval and adoption of
the Merger

                                       9
<PAGE>
Agreement and the transactions contemplated thereby. As of the First  Interstate
Record  Date, FBS beneficially owned     shares of First Interstate Common Stock
(excluding shares issuable to  FBS under certain  conditions as described  under
"The  Merger -- Stock Option Agreements"), all  of which are held in a fiduciary
or custodial capacity, and directors and executive officers of FBS  beneficially
owned  less than 1% of the outstanding  shares of First Interstate Common Stock.
See "Information Concerning the First Interstate Special Meeting."

RECOMMENDATION OF THE FBS BOARD

    The FBS Board (with one director absent) has unanimously determined that the
Merger and the transactions  contemplated thereby are fair  to, and in the  best
interests  of, FBS  and its shareholders,  and has unanimously  approved the FBS
Vote Matters. THE FBS BOARD THEREFORE RECOMMENDS A VOTE FOR APPROVAL OF EACH  OF
THE FBS VOTE MATTERS.

   
    For  a discussion of the factors considered by the FBS Board in reaching its
decision to approve  the Merger and  the FBS  Vote Matters, see  "The Merger  --
Background  of the Merger" and "-- Reasons of FBS for the Merger; Recommendation
of FBS Board."
    

RECOMMENDATION OF THE FIRST INTERSTATE BOARD

    The First  Interstate  Board (with  two  directors absent)  has  unanimously
determined  that the terms of the Merger are  fair to, and in the best interests
of, First Interstate and its shareholders. THE FIRST INTERSTATE BOARD RECOMMENDS
THAT THE FIRST  INTERSTATE SHAREHOLDERS VOTE  FOR APPROVAL AND  ADOPTION OF  THE
MERGER AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY.

    For  a discussion of the factors considered by the First Interstate Board in
reaching its decision to approve and adopt the Merger Agreement, see "The Merger
- -- Background of the Merger" and "-- Reasons of First Interstate for the Merger;
Recommendation of First Interstate Board."

CERTAIN ANTICIPATED BENEFITS OF THE MERGER

   
    Although no assurances can be given in such regard, FBS and First Interstate
expect to achieve cost savings of approximately $500 million annually  (pre-tax)
when  fully implemented in  1997. Approximately 50 percent  of the ultimate cost
savings are expected to be achieved in 1996, assuming system conversion early in
the third  quarter  thereof. Such  cost  savings  are expected  to  be  realized
primarily   through  integration  of  data  processing  and  other  back  office
operations, as well as the elimination of redundant corporate overhead and staff
positions. Cost reductions  will come  from both  companies and  will be  spread
throughout  New First Interstate on a geographic basis. FBS and First Interstate
also anticipate that they will incur one-time expenses and restructuring charges
in connection with the  Merger, which expenses and  charges are estimated to  be
approximately  $225 million (pre-tax)  in the aggregate,  consisting of expenses
and charges  of $475  million offset  by a  $250 million  reserve adjustment  to
conform  First  Interstate's reserve  methodology to  that  of FBS.  These items
principally  result  from  expenses  to  be  incurred  in  connection  with  the
integration  of operations  and systems,  elimination of  redundancies and staff
reductions. It  is anticipated  that  substantially all  of these  expenses  and
charges will be incurred during 1996 in connection with the Merger.
    

    New   First  Interstate's   corporate  headquarters   will  be   located  in
Minneapolis, Minnesota, and its  core business lines will  be directed from  Los
Angeles,  California. In addition, it is expected that New First Interstate will
continue to  operate portions  of its  businesses from  existing FBS  and  First
Interstate  locations on the  West Coast and  in the Rocky  Mountain region. See
"Selected Historical and Unaudited Pro Forma Financial Data" and notes  thereto,
"New First Interstate Forecasted Consolidated Statement of Operations" and notes
thereto  and "The  Merger -- Management  and Operations of  New First Interstate
Following the Merger."

INTERESTS OF CERTAIN PERSONS IN THE MERGER

    Certain  members  of  FBS's  management   and  the  FBS  Board,  and   First
Interstate's  management and  the First  Interstate Board,  respectively, may be
deemed to have certain  interests in the  Merger that are  in addition to  their
interests  as  shareholders of  FBS or  First  Interstate, as  the case  may be,

                                       10
<PAGE>
generally. The FBS  Board and  the First Interstate  Board were  aware of  these
interests  and considered  them, among  other matters,  in approving  the Merger
Agreement and the transactions contemplated thereby.

   
    At the Effective Time, the Board  of Directors of New First Interstate  (the
"New  First  Interstate Board")  will consist  of  20 persons  (unless otherwise
agreed to in  writing prior  to the  Effective Time), 10  of whom  shall be  FBS
Directors  and  10  of whom  shall  be  First Interstate  Directors.  The Merger
Agreement provides that after the Effective Time, the New First Interstate Board
will consist of an even number of directors, and for a period of at least  three
years  following the  Effective Time, to  the extent practicable,  each class of
directors of New First Interstate and each committee of the New First Interstate
Board will  contain  an equal  number  of  FBS Directors  and  First  Interstate
Directors.  The Merger Agreement  provides that, at the  Effective Time, John F.
Grundhofer, the Chairman of the Board, President and Chief Executive Officer  of
FBS,  will be  Chairman of the  Board and  Chief Executive Officer  of New First
Interstate and that William  E. B. Siart,  the Chairman of  the Board and  Chief
Executive Officer of First Interstate, will be the President and Chief Operating
Officer of New First Interstate. See "The Merger -- Interests of Certain Persons
in  the Merger -- Board  of Directors," "-- Interests  of Certain Persons in the
Merger -- Senior  Management" and  -- "Management  and Operations  of New  First
Interstate Following the Merger."
    

   
    The  Merger Agreement  requires that,  for a period  of six  years after the
Effective Time, New First Interstate will  use its best efforts to provide  that
portion of directors' and officers' liability insurance that serves to reimburse
the present and former directors and officers of FBS, First Interstate or any of
their  respective subsidiaries (determined as of the Effective Time) (as opposed
to FBS or  First Interstate) with  respect to claims  against such officers  and
directors arising from facts or events which occurred before the Effective Time.
Such  insurance shall be of at least  the same coverage and amounts, and contain
terms and conditions no less  advantageous, as that coverage currently  provided
by  FBS, subject to  certain requirements and  limitations. The Merger Agreement
also requires  New  First  Interstate, for  a  period  of six  years  after  the
Effective  Time, to indemnify present and former directors and officers of First
Interstate and  FBS and  their  respective subsidiaries  (determined as  of  the
Effective  Time) against  certain losses and  other expenses  in connection with
claims which arise  out of or  pertain to  matters existing or  occurring at  or
prior  to the Effective Time. See "The Merger -- Interests of Certain Persons in
the Merger --  Directors' and  Officers' Insurance; Limitation  of Liability  of
First Interstate and FBS Directors and Officers."
    

   
    FBS  maintains change in  control severance plans covering  a broad range of
salaried employees and providing for different  levels of payments based on  job
classification.  FBS  has entered  into individual  change in  control severance
agreements with  27  officers  providing for  severance  payments  upon  certain
terminations  of employment  during the  two-year period  following a  change in
control. FBS also maintains change in  control severance plans covering a  broad
range of salaried employees and providing for different levels of payments based
on  job classification. The agreements  provide for a lump  sum payment equal to
three times  the  terminated  individual's  annual  salary,  plus  target  bonus
potential,  continuation  of benefits  for  up to  three  years, the  payment of
long-term cash incentive awards and  individual outplacement services. Based  on
current  salaries and target bonus potential, assuming termination of employment
qualifying for  payments under  the  applicable agreements,  executive  officers
would  be entitled to the following payments  in respect of the lump sum portion
of such benefits: Richard  A. Zona, $2,040,000;  Philip G. Heasley,  $1,739,000;
William  F.  Farley,  $1,539,000;  Daniel C.  Rohr,  $1,352,000;  and  all other
executive officers as  a group, $8,078,000.  Mr. Grundhofer's arrangements  with
FBS relating to severance are described below and under "The Merger -- Interests
of  Certain  Persons  in  the  Merger  --  Employment  Agreement  with  John  F.
Grundhofer." FBS  has further  agreed to  compensate such  officers for  certain
taxes  and  penalties  resulting  from  the  severance  agreements.  The  Merger
constitutes a change in control under  such severance agreements and plans.  See
"The  Merger --  Interests of  Certain Persons  in the  Merger --  FBS Change in
Control Severance Agreements."
    

                                       11
<PAGE>
   
    The  vesting  of   all  outstanding  FBS   stock  options  accelerates   and
restrictions  on  restricted  stock  lapse  upon a  change  in  control  of FBS,
including the Merger. "The Merger -- Interests of Certain Persons in the  Merger
- -- FBS Stock Options and Restricted Stock."
    

   
    Effective  January  30, 1995,  FBS and  John F.  Grundhofer entered  into an
Employment Agreement, pursuant to  which Mr. Grundhofer  is entitled to  receive
certain  benefits if  his employment  is terminated  under certain circumstances
following a  change  in  control,  including the  Merger.  In  such  event,  Mr.
Grundhofer  would be entitled to receive: (i)  a lump sum payment equal to three
times his annual  salary plus  the greatest of  (a) the  target bonus  potential
available  on the date of  termination, (b) the bonus  earned in the last fiscal
year prior to the  date of termination  or (c) the average  bonus earned in  the
last  three fiscal years prior to the  date of termination; (ii) continuation of
his participation in FBS benefit and  retirement plans and continuation of a  $1
million  life insurance  policy for a  three year period;  (iii) continuation of
personal benefits for a three year period; (iv) immediate exercisability of  all
options  and vesting of  restricted stock that would  have become exercisable or
vested during the remaining term of the employment agreement if such termination
had not occurred; (v)  credit for five additional  years of service under  FBS's
Supplemental Executive Retirement Plan; (vi) payment for individual outplacement
counseling services up to a maximum of $60,000; and (vii) the full amount of any
long-term  cash incentive  award for  any plan periods  then in  progress to the
extent not provided for in any FBS long-term cash incentive plan or plans. Based
on his  current  salary and  target  bonus potential,  assuming  termination  of
employment  qualifying  for  change  in  control  severance  payments  under the
agreement, Mr.  Grundhofer would  be  entitled to  a  payment of  $5,115,000  in
respect  of the lump sum  portion of such termination  benefits. FBS has further
agreed to compensate Mr.  Grundhofer for certain  taxes and penalties  resulting
from  termination of his employment  following a change in  control, such as the
Merger. See  "The  Merger --  Interests  of Certain  Persons  in the  Merger  --
Employment Agreement with John F. Grundhofer."
    

   
    First  Interstate  has entered  into  individual employment  agreements with
approximately 39 executive  officers of  First Interstate  and its  subsidiaries
which   provide,  among  other  things,  for  severance  payments  upon  certain
terminations of  employment during  the two-year  period following  a change  in
control  of First Interstate. Nine of  these agreements are "Tier I Agreements,"
and the remainder are "Tier II Agreements." The Tier I Agreements provide  that,
following  a qualifying termination, the executive is entitled to receive a lump
sum payment equal to the sum of (1)  $30,000, (2) three times the sum of  annual
salary plus the aggregate of the executive's target bonus awards for the year in
which  the  executive's employment  terminates under  all of  First Interstate's
incentive plans under  which the executive  was then participating  and (3)  the
benefit  attributable to enhancing  the executive's retirement  plan benefits by
three years' service and three years' age. If the qualifying termination  occurs
during  the calendar  year in  which the change  in control  of First Interstate
occurs, the  severance  benefit  is  reduced  by  a  pro  rata  portion  of  the
executive's target bonus for the calendar year in which such termination occurs.
The  terms of the Tier  II Agreements are substantially  similar to those of the
Tier I  Agreements,  except  that  the severance  payments  under  the  Tier  II
Agreements include a $20,000 cash payment, have a multiplier of two, and provide
for enhancement of retirement benefits by two years' service and two years' age.
The  Tier I Agreements and the Tier  II Agreements provide that an executive may
refuse all or any portion of the severance payments if the executive  determines
that  receipt of such payment  may result in adverse  tax consequences to him or
her. Based on current salaries and target bonus potential, assuming  termination
of  employment  under  circumstances  entitling  them  to  benefits  under their
agreements, executive officers  would be entitled  to the following  approximate
amounts: Mr. Siart, $4,570,000; Mr. William S. Randall, $3,420,000; Mr. Bruce G.
Willison,  $2,730,000; Mr.  James J.  Curran, $2,690,000;  Ms. Linnet  F. Deily,
$2,270,000; and all other executive officers  as a group, $29,000,000. See  "The
Merger  -- Interests of Certain Persons in The Merger -- First Interstate Change
in Control Severance Agreements."
    

   
    In addition, if a change in control  of First Interstate were to occur,  the
executive  officers would  receive their  target bonus  payments for  1996 under
First  Interstate's  annual  incentive  plans.   If  1996  bonus  targets   were
established   in  a  manner  similar  to   those  established  for  1995,  First
Interstate's
    

                                       12
<PAGE>
   
executive officers would be entitled  to the following approximate amounts:  Mr.
Siart,  $864,000;  Mr. Randall,  $572,000; Mr.  Willison, $450,000;  Mr. Curran,
$395,000;  Ms.  Deily,  $430,000;  and  all  other  participants  as  a   group,
$17,000,000.   The  approval  of  the   Merger  Agreement  by  First  Interstate
shareholders will constitute a  change in control for  purposes of these  annual
incentive  plans. See "The Merger -- Interests  of Certain Persons in the Merger
- -- First Interstate Cash-Based Incentive Awards."
    

   
    Upon the  approval of  the Merger  Agreement by  the shareholders  of  First
Interstate,  each outstanding  First Interstate  Stock Option  will become fully
exercisable and all restrictions with  respect to restricted stock shall  lapse.
As  of December  31, 1995, First  Interstate's directors  and executive officers
held unvested  First Interstate  Stock Options  in respect  of an  aggregate  of
923,175  shares of First Interstate Common  Stock at a weighted average exercise
price of $65.83  per share and  three of First  Interstate's executive  officers
held  an aggregate of 2,250 restricted  shares of First Interstate Common Stock.
See "The  Merger  --  Interests  of  Certain Persons  in  the  Merger  --  First
Interstate Equity-Based Incentive Awards."
    

OPINION OF FBS FINANCIAL ADVISOR

    FBS's  financial advisor, J.P.  Morgan Securities Inc.  ("J.P. Morgan"), has
rendered its opinion to the FBS Board, dated November 5, 1995, that the Exchange
Ratio is fair to holders of FBS Common  Stock from a financial point of view.  A
copy  of such opinion is attached hereto as Appendix F and should be read in its
entirety with  respect to  the assumptions  made, other  matters considered  and
limitations on the reviews undertaken in connection with such opinion.

OPINIONS OF FIRST INTERSTATE FINANCIAL ADVISORS

   
    First  Interstate's  financial  advisors, Goldman,  Sachs  &  Co. ("Goldman,
Sachs") and  Morgan Stanley  & Co.  Incorporated ("Morgan  Stanley"), have  each
rendered   their  opinion,  dated  November  6,   1995  and  November  5,  1995,
respectively, to the First Interstate Board that the Exchange Ratio is fair  or,
in  the case of Morgan Stanley's opinion, fair from a financial point of view to
the holders of  First Interstate  Common Stock.  On November  19, 1995  Goldman,
Sachs  advised the First Interstate Board that nothing had come to its attention
that would  cause  it to  withdraw  or amend  its  opinion, and  Morgan  Stanley
reaffirmed  its previous opinion.  Morgan Stanley also noted  in its November 5,
1995 opinion that, as of that date, based upon publicly available information in
the case of Wells Fargo & Co. ("Wells"), each of the .625 Exchange Ratio and the
 .650 Exchange  Ratio,  as described  under  "The  Merger --  Background  of  the
Merger,"  would be fair from  a financial point of view  to the holders of First
Interstate Common Stock  (other than Wells  and its affiliates).  Copies of  the
opinions  and letters issued  by Goldman, Sachs and  Morgan Stanley are attached
hereto as Appendices G and H, respectively.  Each opinion should be read in  its
entirety  with respect  to the  assumptions made,  other matters  considered and
limitations on the reviews undertaken in connection with such opinion.
    

BUSINESS PENDING CONSUMMATION OF THE MERGER

    Pursuant to the Merger Agreement, each of FBS and First Interstate has  made
certain covenants relating to the conduct of their respective businesses pending
consummation  of  the Merger.  Among other  things, each  has agreed  (except as
otherwise contemplated by or disclosed in connection with the Merger  Agreement)
to  conduct its business in the usual, regular and ordinary course. In addition,
each has agreed (except as otherwise contemplated by or disclosed in  connection
with  the  Merger Agreement)  not to,  among  other things,  (i) declare  or pay
dividends in a  manner inconsistent with  past practice or  redeem or  otherwise
acquire  shares of its capital  stock or issue additional  shares of its capital
stock; (ii) dispose  of any of  its material  properties or assets  or make  any
material  acquisition other than in the ordinary course consistent with its past
practices; (iii)  enter  into,  amend  or terminate  any  material  contract  or
agreement;  or (iv) increase in any  material respect the compensation or fringe
benefits of any of its  employees or enter into  or modify any employee  benefit
plans  or  employment  agreements  except in  the  ordinary  course  of business
consistent with past practice.  See "The Merger --  Conduct of Business  Pending
the Merger and Other Agreements."

                                       13
<PAGE>
REGULATORY APPROVALS REQUIRED

   
    The Merger is subject to the prior approval of the Board of Governors of the
Federal  Reserve System  (the "Federal Reserve  Board") under the  BHC Act, and,
with respect  to certain  aspects of  the Merger,  of the  Alaska Department  of
Commerce  and Economic Development,  the Arizona Superintendent  of Banking, the
Arizona Department of Insurance, the  California Superintendent of Banking,  the
Colorado  Banking Board,  the Idaho Director  of the Department  of Finance, the
Nevada Commissioner  of  Financial  Institutions, the  Wyoming  Commissioner  of
Banking and the Minister of Finance of Canada. FBS's final Federal Reserve Board
application  was filed with the Federal  Reserve Bank of Minneapolis on November
10, 1995 and has been accepted  as informationally complete. FBS has also  filed
all notices and/or applications required to obtain the other required regulatory
approvals  (other  than  the  Canadian  approvals).  Although  there  can  be no
assurances, neither FBS nor First Interstate  believes that there is any  reason
that  such  approvals  will  not be  received  on  a timely  basis  or  that any
burdensome conditions will be imposed.  See "The Merger -- Regulatory  Approvals
Required."
    

CONDITIONS TO CONSUMMATION OF THE MERGER

    Consummation  of the Merger is subject,  among other things, to (i) approval
and adoption of the  Merger Agreement by the  requisite affirmative vote of  the
holders  of the outstanding First Interstate  Common Stock, (ii) approval of the
FBS Vote  Matters  by the  requisite  affirmative vote  of  the holders  of  the
outstanding  FBS Common Stock,  (iii) the shares of  New First Interstate Common
Stock and  the New  First Interstate  Depositary Shares  to be  issued to  First
Interstate  shareholders upon consummation of  the Merger having been authorized
for listing on the NYSE, subject to official notice of issuance, (iv) receipt of
the Requisite Regulatory Approvals without  the imposition of any conditions  or
restrictions  that will have or could reasonably  be expected to have a material
adverse effect on New First Interstate, (v) no court or agency having taken  any
action,  nor any law or regulation having been enacted, which prohibits or makes
illegal the consummation of the Merger, (vi) receipt by FBS and First Interstate
of opinions of their respective counsel as to the tax-free nature of the  Merger
for  federal income tax  purposes, (vii) receipt  of letters from  Ernst & Young
LLP, dated as of the Effective Time, to the effect that the Merger will  qualify
for  "pooling-of-interests"  accounting  treatment,  and  (viii)  certain  other
closing conditions. There can be no assurance  as to when or if such  conditions
will  be satisfied (or,  where permissible, waived)  or that the  Merger will be
consummated. See "The Merger  -- Conditions to Consummation  of the Merger"  and
"-- Regulatory Approvals Required."

TERMINATION OF THE MERGER AGREEMENT

   
    The  Merger Agreement may be terminated by mutual agreement of the FBS Board
and the First Interstate Board. The  Merger Agreement also may be terminated  by
either  the  FBS Board  or  the First  Interstate  Board if  (i)  a governmental
authority finally has denied an application with respect to any of the Requisite
Regulatory Approvals, (ii) the Merger does  not occur on or before December  31,
1996  (subject to  extension to  June 30,  1997 under  certain circumstances set
forth in the Merger Agreement), provided that the failure of the Merger to occur
by such date  is not caused  by a breach  of the Merger  Agreement by the  party
seeking  such termination, (iii) in the event  of a material breach by the other
party of any of its representations, warranties, covenants or agreements in  the
Merger  Agreement that cannot be or has not  been cured within 30 days of notice
of such breach, (iv)  the requisite approval of  either the FBS shareholders  or
the  First Interstate shareholders  is not obtained  at their respective Special
Meetings, (v) prior to the receipt of the requisite approval of the  terminating
party's shareholders, there is an outstanding proposal by a third party to merge
with  or acquire a substantial  equity interest in, or  a substantial portion of
the assets  of,  the  terminating  party  and the  Board  of  Directors  of  the
terminating  party  determines  that  termination  of  the  Merger  Agreement is
necessary in the exercise of its fiduciary duties or (vi) the Board of Directors
of the other party shall have withdrawn or adversely modified its recommendation
of the matters to be  voted on at such other  party's Special Meeting. See  "The
Merger -- Termination of the Merger Agreement."
    

                                       14
<PAGE>
TERMINATION FEES

    As an inducement and condition to FBS's willingness to enter into the Merger
Agreement,  First Interstate (as payor) entered into a Termination Fee Agreement
with FBS (as recipient), dated as of November 5, 1995 (the "First Interstate Fee
Agreement"),  and  as  an  inducement   and  condition  to  First   Interstate's
willingness  to enter into the  Merger Agreement, FBS (as  payor) entered into a
Termination Fee  Agreement with  First Interstate  (as recipient),  dated as  of
November  5,  1995  (the  "FBS  Fee  Agreement"  and,  together  with  the First
Interstate Fee  Agreement, the  "Fee Agreements").  The Fee  Agreements are  set
forth in Appendices D and E to this Joint Proxy Statement/ Prospectus.

    Pursuant  to the  Fee Agreements,  First Interstate  (pursuant to  the First
Interstate Fee  Agreement) and  FBS (pursuant  to the  FBS Fee  Agreement)  each
agreed  to pay (as "Payor")  the other party (as "Recipient")  a cash fee of $25
million in the event certain First Trigger Events occur prior to or concurrently
with the termination of  the Merger Agreement, except  where a Nullifying  Event
has  occurred and  is continuing  at such time.  Under the  First Interstate Fee
Agreement, a First Trigger Event would include, among other things, the  failure
of  the  shareholders  of  First  Interstate to  approve  and  adopt  the Merger
Agreement  at  the  First  Interstate  Special  Meeting  following  the   public
announcement  of an Acquisition  Proposal. For purposes  of the First Interstate
Fee Agreement, various actions taken by Wells in connection with the Wells Offer
constituted the public announcement of an Acquisition Proposal.

    Pursuant to the Fee Agreements, First  Interstate and FBS each also  agreed,
subject  to certain conditions, to pay the other party an additional $75 million
cash  fee  if  (i)  the  Merger  Agreement  is  terminated,  (ii)  prior  to  or
concurrently with such termination a First Trigger Event shall have occurred and
(iii) prior to, concurrently with or within 18 months following such termination
an  Acquisition  Event occurs,  unless a  Nullifying Event  has occurred  and is
continuing at the  time the Merger  Agreement is terminated.  If Wells  acquires
more  than 50% of the outstanding First  Interstate Common Stock pursuant to the
Wells Offer or otherwise, an Acquisition  Event will have occurred for  purposes
of  the First Interstate  Fee Agreement. To  the best of  First Interstate's and
FBS's knowledge, as of the date hereof, no event has occurred that would require
FBS to  pay a  termination  fee to  First Interstate  pursuant  to the  FBS  Fee
Agreement upon termination of the Merger Agreement.

   
    See  "The Merger  -- Background of  the Merger", "--  Termination Fees", "--
Certain  Litigation"   and   Appendices   D   and  E   to   this   Joint   Proxy
Statement/Prospectus.
    

STOCK OPTION AGREEMENTS

    As a further inducement and condition to FBS's willingness to enter into the
Merger  Agreement,  First Interstate  (as issuer)  entered  into a  Stock Option
Agreement with  FBS (as  grantee), dated  as  of November  5, 1995  (the  "First
Interstate Stock Option Agreement"), and as an inducement and condition to First
Interstate's  willingness to  enter into the  Merger Agreement,  FBS (as issuer)
entered into a Stock Option Agreement with First Interstate (as grantee),  dated
as  of November 5, 1995 (the "FBS Stock Option Agreement" and, together with the
First Interstate Stock  Option Agreement,  the "Stock  Option Agreements").  The
Stock  Option Agreements are set forth in Appendices B and C to this Joint Proxy
Statement/Prospectus.

    Pursuant to the  First Interstate Stock  Option Agreement, First  Interstate
granted to FBS an irrevocable option (the "First Interstate Option") to purchase
a number of shares of First Interstate Common Stock approximately equal to 19.9%
of the number of shares of First Interstate Common Stock outstanding immediately
before  exercise of the First Interstate Option  for a purchase price of $127.75
per share, subject to adjustment in certain circumstances.

    Pursuant to the FBS Stock Option Agreement, FBS granted to First  Interstate
an  irrevocable  option  (the  "FBS Option"  and,  collectively  with  the First
Interstate Option, the "Options") to purchase  a number of shares of FBS  Common
Stock  approximately equal to 19.9% of the  number of shares of FBS Common Stock
outstanding  immediately   before   exercise   of   the   FBS   Option   for   a

                                       15
<PAGE>
   
purchase   price  of  $50.875  per  share,  subject  to  adjustment  in  certain
circumstances. Each of the Options will  become exercisable in whole or in  part
at any time prior to its expiration, if, but only if, both an Initial Triggering
Event  and a Subsequent Triggering Event has occurred prior to the occurrence of
an Exercise Termination Event. A holder may exercise an Option which has  become
exercisable for six months following the applicable Subsequent Triggering Event,
subject to extension in order to obtain required regulatory approvals, to comply
with  applicable regulatory waiting periods or  to avoid liability under Section
16(b) of the Exchange Act.
    

   
    For purposes of the First Interstate Stock Option Agreement, various actions
taken by  Wells  in  connection  with  the Wells  Offer  have  resulted  in  the
occurrence  of an Initial Triggering Event.  In addition, if Wells acquires more
than 20% of the outstanding First Interstate Common Stock pursuant to the  Wells
Offer  or  otherwise, or  if the  First Interstate  Board recommends  that First
Interstate shareholders accept  the Wells Offer,  a Subsequent Triggering  Event
will  occur for  purposes of  the First  Interstate Stock  Option Agreement and,
subject to the  conditions described  herein, the First  Interstate Option  will
become exercisable. To the best of First Interstate's and FBS's knowledge, as of
the  date hereof, no event has occurred that would trigger the exercisability of
the FBS Option.
    

   
    Upon either (i) the acquisition by a third party of beneficial ownership  of
50% or more of the outstanding shares of common stock of the issuer of an Option
which  has  become  exercisable  or (ii)  subject  to  certain  limitations, the
consummation of an  Acquisition Transaction  with respect  to the  issuer of  an
Option  which has become  exercisable, the holder  of such Option  will have the
right to require  the issuer of  the Option  to repurchase such  Option (or  the
shares  purchased pursuant thereto). In such event, the issuer would be required
to repurchase  the  Option  at  a  price  equal  to  the  amount  by  which  the
"Market/Offer  Price"  of the  issuer's common  stock  (as defined)  exceeds the
purchase price  per share,  multiplied by  the number  of shares  for which  the
Option may then be exercised.
    

    The  purchase of any shares  of First Interstate Common  Stock or FBS Common
Stock pursuant to  the Options  is subject  to compliance  with applicable  law,
including receipt of any necessary approvals under the BHC Act.

   
    Arrangements  such as the Fee Agreements and the Options are entered into in
connection with corporate mergers and acquisitions in an effort to increase  the
likelihood  that the transactions  will be consummated  in accordance with their
terms, and to  compensate the  grantee for  the efforts  undertaken and  losses,
expenses   and  opportunity  costs  incurred  by   it  in  connection  with  the
transactions if they are not  consummated under certain circumstances  involving
an  acquisition or potential acquisition of the issuer by a third party. The Fee
Agreements and the Stock Option Agreements were entered into to accomplish these
objectives, and not  because of  the proposals made  by Wells  to acquire  First
Interstate,  although FBS's desire to enter  into such arrangements was enhanced
as a result thereof. The Fee Agreements  and the Options may have the effect  of
discouraging offers by third parties to acquire First Interstate or FBS prior to
the Merger, even if, in the case of First Interstate, such persons were prepared
to  offer to  pay consideration  to First  Interstate's shareholders  that has a
higher current market price than the shares  of FBS Common Stock to be  received
by  the  holders  of  First  Interstate  Common  Stock  pursuant  to  the Merger
Agreement. Certain persons, including Wells, have filed lawsuits challenging the
validity of the First  Interstate Fee Agreement and  the First Interstate  Stock
Option  Agreement. FBS and First Interstate intend to defend against such claims
vigorously, and believe that they will not have a material adverse effect on the
parties' ability to consummate the Merger in a timely manner.
    

    Pursuant to the terms of the Stock Option Agreements, the "Total Profit" (as
such term is  defined in the  Stock Option  Agreements) that the  grantee of  an
Option can realize thereunder may not exceed $100 million.

   
    See  "The Merger -- Background of  the Merger", "-- Stock Option Agreements"
and "--  Certain  Litigation"  and  Appendices  B and  C  to  this  Joint  Proxy
Statement/Prospectus.
    

                                       16
<PAGE>
CERTAIN FEDERAL INCOME TAX CONSEQUENCES

   
    The  obligation of each of First Interstate and FBS to consummate the Merger
is conditioned  on,  among  other things,  the  receipt  of an  opinion  of  its
respective  counsel based upon certain representations and assumptions set forth
therein, substantially to the  effect that for federal  income tax purposes  the
Merger  will qualify as a "reorganization"  under Section 368(a) of the Internal
Revenue Code of 1986, as amended (the "Code"), and that accordingly: (i) no gain
or loss will be recognized by FBS, First Interstate or Merger Sub as a result of
the Merger; (ii)  no gain or  loss will  be recognized by  any First  Interstate
shareholder  (except  in  connection with  the  receipt  of cash  in  lieu  of a
fractional share  interest  in  New  First Interstate  Common  Stock)  upon  the
exchange  of First Interstate  Common Stock or  First Interstate Preferred Stock
for New First Interstate Common Stock  or New First Interstate Preferred  Stock,
respectively,  in the Merger;  and (iii) the  basis of the  New First Interstate
Common Stock  and New  First  Interstate Preferred  Stock  received by  a  First
Interstate shareholder who exchanges First Interstate Common Stock for New First
Interstate  Common  Stock  or First  Interstate  Preferred Stock  for  New First
Interstate Preferred Stock will be the same as the basis of the First Interstate
Common  Stock  or  First  Interstate  Preferred  Stock,  as  the  case  may  be,
surrendered  in exchange  therefor (subject to  any adjustments  required as the
result of  the receipt  of cash  in  lieu of  a fractional  share of  New  First
Interstate  Common Stock).  If the required  tax opinions are  not received, the
Merger will not be consummated unless the conditions requiring their receipt are
waived and  the approvals  of  the FBS  and  First Interstate  shareholders  are
resolicited  by means of an updated Joint Proxy Statement/Prospectus. EACH FIRST
INTERSTATE SHAREHOLDER IS URGED TO CONSULT HIS OR HER OWN TAX ADVISOR CONCERNING
THE FEDERAL INCOME  TAX CONSEQUENCES OF  THE MERGER, AS  WELL AS ANY  APPLICABLE
STATE,  LOCAL, FOREIGN OR OTHER TAX  CONSEQUENCES, BASED UPON SUCH SHAREHOLDER'S
OWN PARTICULAR  FACTS AND  CIRCUMSTANCES.  See "The  Merger --  Certain  Federal
Income Tax Consequences."
    

NO APPRAISAL RIGHTS

    Holders  of First Interstate Common Stock, First Interstate Preferred Stock,
First Interstate Depositary Shares, FBS Common Stock and preferred stock of  FBS
will  not have any  appraisal rights under the  Delaware General Corporation Law
(the "DGCL") in connection with the Merger Agreement and the consummation of the
transactions contemplated thereby. See "The Merger -- No Appraisal Rights."

ACCOUNTING TREATMENT

    It  is   intended   that  the   Merger   will   be  accounted   for   as   a
"pooling-of-interests"   under   generally   accepted   accounting   principles.
Consummation of the Merger is conditioned upon receipt of letters from FBS's and
First Interstate's independent  auditors to the  effect that the  Merger may  be
accounted  for in such manner. See "The  Merger -- Accounting Treatment" and "--
Conditions to Consummation of the Merger."

MARKETS AND MARKET PRICES

   
    FBS Common Stock  is listed on  the NYSE  under the symbol  "FBS" and  First
Interstate  Common Stock is  listed on the  NYSE and the  Pacific Stock Exchange
under the symbol "I." The following table sets forth the closing price per share
of FBS Common Stock and the closing  price per share of First Interstate  Common
Stock,  each as  reported on  the NYSE Composite  Tape, and  the "equivalent per
share price"  (as defined  below) of  First Interstate  Common Stock  as of  (i)
November 3, 1995, the last trading day before FBS and First Interstate announced
the  execution of the Merger Agreement, (ii) November 17, 1995, the last trading
day prior to the meeting of the First Interstate Board of Directors at which the
First Interstate  Financial Advisors  updated their  analysis of  the Merger  in
light of the Wells Offer, and (iii) December 27, 1995, the last practicable date
prior  to the  date of  this preliminary  Joint Proxy  Statement/Prospectus. The
"equivalent per share price" of First Interstate
    

                                       17
<PAGE>
Common Stock as of such dates equals  the closing price per share of FBS  Common
Stock  on  such dates  multiplied  by the  Exchange  Ratio. See  "The  Merger --
Conversion of First Interstate Capital Stock; Effects on FBS Shareholders."

   
<TABLE>
<CAPTION>
                                                      FIRST       EQUIVALENT
                                     FBS COMMON    INTERSTATE         PER
MARKET PRICE PER SHARE AS OF            STOCK     COMMON STOCK    SHARE PRICE
- -----------------------------------  -----------  -------------  -------------
<S>                                  <C>          <C>            <C>
November 3, 1995...................  $   50.875   $     127.75   $    132.275
November 17, 1995..................      $53.00   $     135.00        $137.80
December 27, 1995..................      $50.25   $     136.00        $130.66
</TABLE>
    

    FBS and First Interstate shareholders  are advised to obtain current  market
quotations  for FBS Common Stock and  First Interstate Common Stock. Because the
Exchange Ratio is fixed, a change in the market price of FBS Common Stock before
the Merger would affect  the market value  as of the Effective  Time of the  New
First  Interstate Common Stock to be received  in the Merger in exchange for the
First Interstate Common Stock. THERE CAN BE NO ASSURANCE AS TO THE MARKET  PRICE
OF  THE FBS  COMMON STOCK AT  ANY TIME  BEFORE THE EFFECTIVE  TIME OR  AS TO THE
MARKET PRICE OF THE  NEW FIRST INTERSTATE COMMON  STOCK AT ANY TIME  THEREAFTER.
SHAREHOLDERS  ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR FBS COMMON STOCK
AND FIRST  INTERSTATE COMMON  STOCK.  SEE "THE  MERGER  -- CONVERSION  OF  FIRST
INTERSTATE CAPITAL STOCK; EFFECTS ON FBS SHAREHOLDERS."

    Following  the  Merger,  the First  Interstate  Common Stock  and  the First
Interstate Depositary Shares  will no  longer exist and,  as a  result, will  no
longer  be listed on the NYSE. The New First Interstate Common Stock and the New
First Interstate Depositary Shares are expected to be listed on the NYSE.

DIFFERENCES IN RIGHTS OF SHAREHOLDERS

   
    Upon consummation of the  Merger, holders of  First Interstate Common  Stock
will  become holders of  New First Interstate  Common Stock. As  a result, their
rights as shareholders, which are now  governed by the DGCL, First  Interstate's
Certificate  of Incorporation (the "First Interstate Certificate") and the First
Interstate Bylaws, will be governed by the DGCL, the FBS Certificate (as amended
in accordance with the Merger Agreement)  and the FBS Bylaws. There are  certain
differences  between the provisions of the  First Interstate Certificate and the
First Interstate Bylaws and the FBS Certificate  and the FBS Bylaws, and so  the
rights  of holders of  First Interstate Common Stock  will change somewhat after
the Merger.  The  holders of  shares  of each  series  of New  First  Interstate
Preferred  Stock will  be entitled to  rights and  preferences substantially the
same as  the  rights  and  preferences of  the  corresponding  series  of  First
Interstate  Preferred  Stock. The  holders  of New  First  Interstate Depositary
Shares will also have one-eighth  of a vote per  share on all matters  submitted
generally  to  the shareholders  of  New First  Interstate  and will,  except as
otherwise required  by law,  vote together  with the  holders of  the New  First
Interstate  Common Stock  as a  single class. For  a discussion  of the material
differences between the rights of holders  of First Interstate Common Stock  and
the  rights of holders of New First  Interstate Common Stock, see "The Merger --
Certain Differences in Rights of Shareholders of First Interstate and New  First
Interstate."
    

DIVIDENDS

   
    In  connection with the Merger, FBS and First Interstate will coordinate the
declaration and payment of  dividends in respect of  FBS Common Stock and  First
Interstate  Common Stock.  The Board of  Directors of New  First Interstate will
determine the amount and timing of any dividends declared and paid by New  First
Interstate  after  the  Effective Time.  Management  of  each of  FBS  and First
Interstate intends  to  recommend  to  the  Board  of  Directors  of  New  First
Interstate  the  continuation of  quarterly dividends  at rates  consistent with
FBS's recent dividend practices. See "The Merger -- Dividends."
    

EXPENSES

    The Merger  Agreement  provides  that,  except  as  set  forth  in  the  Fee
Agreements,  all costs and  expenses incurred in connection  with the Merger and
the transactions contemplated thereby shall be paid by the party incurring  such
costs  and  expenses,  except  that  the  costs  and  expenses  of  printing and

                                       18
<PAGE>
mailing this Joint  Proxy Statement/Prospectus,  and all filing  and other  fees
paid  to the Commission in connection with the Merger, shall be borne equally by
FBS and First Interstate. See "The Merger -- Expenses."

   
WELLS EXCHANGE OFFER
    

   
    On November  13,  1995, following  the  announcement of  the  Merger,  Wells
announced  that it  intended to commence  an unsolicited  hostile exchange offer
(the "Wells Offer") in which holders of First Interstate Common Stock would have
the right to exchange each  of their shares for two-thirds  of a share of  Wells
Common  Stock.  Following such  announcement, after  consideration of  the Wells
Offer and  the Merger,  the First  Interstate Board  reaffirmed the  Merger  and
recommended  that First Interstate shareholders reject the Wells Offer and, when
and if  such  offer is  commenced,  not tender  any  of their  shares  of  First
Interstate  Common Stock  or rights  pursuant thereto.  For a  discussion of the
factors considered by the First Interstate Board in determining to reaffirm  the
Merger  and recommend  that First Interstate  shareholders not  accept the Wells
Offer,  see  "The  Merger  --  Reasons  of  First  Interstate  for  the  Merger;
Recommendation of First Interstate Board."
    

   
    THE  FIRST INTERSTATE  BOARD RECOMMENDS  THAT FIRST  INTERSTATE SHAREHOLDERS
VOTE FOR APPROVAL  AND ADOPTION  OF THE  MERGER AGREEMENT  AND THE  TRANSACTIONS
CONTEMPLATED THEREBY. THE FIRST INTERSTATE BOARD BELIEVES THAT THE MERGER SHOULD
PROVIDE  LONG-TERM  VALUE TO  FIRST INTERSTATE'S  SHAREHOLDERS SUPERIOR  TO THAT
PROVIDED BY A TRANSACTION WITH WELLS PURSUANT TO THE TERMS OF THE WELLS OFFER.
    

   
COMPARISON OF THE MERGER AND THE WELLS OFFER
    

   
    A  document  entitled  "Comparison  of  the  Proposed  First  Bank   System,
Inc./First Interstate Bancorp Merger and the Proposed Wells Fargo & Co. Exchange
Offer"  (the  "Comparison") will  be  filed as  an  exhibit to  the Registration
Statement. The Comparison will  set forth an analysis  comparing the Merger  and
the Wells Offer from the perspective of shareholders of First Interstate. Copies
of  the Comparison will  be mailed to shareholders  of First Interstate together
with this Joint  Proxy Statement/Prospectus, and  First Interstate  shareholders
are  urged to read the Comparison  carefully. FBS shareholders may obtain copies
of the  Comparison, without  charge, upon  written  or oral  request to  FBS  by
following  the instructions described under  "Incorporation of Certain Documents
by Reference".
    

                                       19
<PAGE>
                      COMPARATIVE UNAUDITED PER SHARE DATA

   
    The following table presents selected  comparative unaudited per share  data
for  FBS on a historical and pro  forma combined basis, and for First Interstate
on a historical  and pro  forma equivalent basis,  giving effect  to the  Merger
using the pooling-of-interests method of accounting, and to the acquisition (the
"FirsTier  Acquisition") by FBS  of FirsTier Financial,  Inc. ("FirsTier") using
the purchase method of  accounting. The information  presented below is  derived
from  the consolidated historical financial  statements of FBS, First Interstate
and FirsTier, including the related notes  thereto, and the unaudited pro  forma
combined  financial information,  including the  notes thereto,  incorporated by
reference   into,    or   appearing    elsewhere    in,   this    Joint    Proxy
Statement/Prospectus.  This information should be  read in conjunction with such
historical and pro forma financial statements and the related notes thereto. See
"Incorporation of  Certain  Documents by  Reference"  and "Unaudited  Pro  Forma
Condensed Combined Financial Information."
    

   
    The  per share data  included within are  presented for comparative purposes
only and  are  not  necessarily  indicative of  the  future  combined  financial
position, the results of the future operations or the actual results or combined
financial  position of the combined entity that would have been achieved had the
Merger and  the  FirsTier Acquisition  been  consummated prior  to  the  periods
indicated.
    

<TABLE>
<CAPTION>
                                                                                                FIRST INTERSTATE
                                                                       FBS COMMON STOCK           COMMON STOCK
                                                                    ----------------------  ------------------------
                                                                                PRO FORMA                 PRO FORMA
                                                                    HISTORICAL  COMBINED    HISTORICAL   EQUIVALENT
                                                                    ---------  -----------  -----------  -----------
<S>                                                                 <C>        <C>          <C>          <C>
BOOK VALUE (1):
  September 30, 1995..............................................     $20.33      $19.76   $    47.95   $    51.38
  December 31, 1994...............................................      18.63       17.72        41.59        46.07

DIVIDENDS DECLARED (2):
  Nine Months Ended:
    September 30, 1995............................................     1.0875      1.0875         2.30       2.8275

  Year Ended:
    December 31, 1994.............................................       1.16        1.16         2.75         3.02
    December 31, 1993.............................................       1.00        1.00         1.60         2.60
    December 31, 1992.............................................       0.88        0.88         1.20         2.29

INCOME FROM CONTINUING OPERATIONS BEFORE EXTRAORDINARY ITEM AND
 CUMULATIVE EFFECT OF CHANGES IN ACCOUNTING PRINCIPLES (3):
  Nine Months Ended:
    September 30, 1995............................................       3.05        3.13         8.36         8.14

  Year Ended:
    December 31, 1994.............................................       2.21        2.90         8.71         7.54
    December 31, 1993.............................................       2.46        2.47         6.68         6.42
    December 31, 1992.............................................       1.46        1.29         3.23         3.35
</TABLE>

                           (Notes on following page)

                                       20
<PAGE>
                 NOTES TO COMPARATIVE UNAUDITED PER SHARE DATA

   
(1)  The pro forma combined book values per  share of FBS Common Stock are based
    upon the  pro  forma total  common  equity  for FBS,  First  Interstate  and
    FirsTier,  divided  by the  total pro  forma common  shares of  the combined
    entity assuming conversion of First Interstate and FirsTier common stock  at
    the  respective exchange ratios, net of  related repurchases of existing FBS
    Common Stock equal  to one-half  of the  FBS Common  Stock to  be issued  in
    connection  with  the FirsTier  Acquisition. The  pro forma  equivalent book
    values per share of  First Interstate Common Stock  represent the pro  forma
    combined  amounts per share  of FBS Common Stock  multiplied by the Exchange
    Ratio. See  "The Merger  -- Conversion  of First  Interstate Capital  Stock;
    Effects on FBS Shareholders."
    

   
(2)  The  pro  forma  combined  dividends  declared  assume  no  changes  in the
    historical dividends declared per share of  FBS Common Stock. The pro  forma
    equivalent  dividends per share  of First Interstate  Common Stock represent
    the cash dividends declared on one  share of FBS Common Stock multiplied  by
    the  Exchange Ratio. Management of each  of FBS and First Interstate intends
    to recommend  to  the  Board  of Directors  of  New  First  Interstate,  the
    continuation  of quarterly dividends  at rates consistent  with FBS's recent
    dividend practices, although no assurances can be given in such regard.  See
    "The  Merger -- Conversion of First Interstate Capital Stock; Effects on FBS
    Shareholders."
    

   
(3)  The  pro   forma  combined   income  from   continuing  operations   before
    extraordinary item and cumulative effect of changes in accounting principles
    per  share of FBS Common Stock are  based upon the pro forma combined income
    from continuing operations before  extraordinary item and cumulative  effect
    of  changes in accounting principles for FBS, First Interstate and FirsTier,
    divided by the average pro forma  common shares of the combined entity.  The
    pro  forma equivalent income  from continuing operations  per share of First
    Interstate Common Stock represents the  pro forma combined income per  share
    of  FBS Common Stock  multiplied by the  Exchange Ratio. See  "The Merger --
    Conversion of First Interstate Capital Stock; Effects on FBS Shareholders."
    

   
    After the Merger FBS and First  Interstate expect to achieve operating  cost
    savings  by various means including reductions in staff and consolidation of
    certain data processing and other back office operations. No adjustment  has
    been  included in the unaudited pro  forma combined financial statements for
    the anticipated operating cost savings.
    

    Financial results  for FBS  in  1994 include  merger-related items  with  an
    after-tax  effect of  $156.9 million ($1.15  per share)  associated with the
    merger with Metropolitan Financial Corporation. Financial results for FBS in
    1993 include  merger-related  charges  with an  after-tax  effect  of  $50.0
    million  ($.37 per share) associated with  the merger with Colorado National
    Bankshares, Inc. Included in FBS results of operations in 1992 are after-tax
    merger-related charges of $81.8 million ($.66 per share) associated with the
    merger  with  Western  Capital   Investment  Corporation  and  Bank   Shares
    Incorporated.

    The  First  Interstate  results  of operations  for  the  nine  months ended
    September 30, 1995 and  the year ended December  31, 1994 include  after-tax
    charges  of $9.5  million and  $87.6 million,  respectively, related  to the
    adoption of a restructuring plan  designed to improve efficiency and  better
    position First Interstate for the introduction of full interstate banking.

                                       21
<PAGE>
           SELECTED HISTORICAL AND UNAUDITED PRO FORMA FINANCIAL DATA

   
    The  following  tables set  forth  certain selected  historical consolidated
financial information  for  FBS,  First Interstate  and  FirsTier,  and  certain
unaudited  pro forma combined financial information  giving effect to the Merger
using the pooling-of-interests  method of  accounting and  the pending  FirsTier
Acquisition using the purchase method of accounting (included in the nine months
ended  September 30, 1995  and the year  ended December 31,  1994 only). The pro
forma combined balance sheet  information for September  30, 1995 also  includes
Midwestern  Services,  Inc. and  Southwest Holdings,  Inc.,  both of  which were
acquired by FBS on November 1, 1995, as well as the intangible assets related to
the pending purchase by FBS of the corporate trust relationships and accounts of
BankAmerica Corporation  (the  "Corporate  Trust Acquisition").  The  pro  forma
combined income statement information does not include Midwestern Services, Inc.
and  Southwest Holdings, Inc.,  or the fees attributable  to the Corporate Trust
Acquisition, as they are immaterial. The historical selected financial data  for
the  years  ended  December  31,  1990 through  1994  are  derived  from audited
consolidated financial statements  of FBS,  First Interstate  and FirsTier.  The
historical  selected financial data for the nine months ended September 30, 1994
and 1995 are derived from the unaudited historical financial statements of  FBS,
First  Interstate and  FirsTier and reflect,  in the respective  opinions of the
managements of FBS, First Interstate  and FirsTier, all adjustments  (consisting
only  of normal recurring adjustments) necessary for a fair presentation of such
data. This  information should  be  read in  conjunction with  the  consolidated
historical  financial statements of FBS, First  Interstate and FirsTier, and the
related notes thereto, incorporated by reference in this Joint Proxy  Statement/
Prospectus,  and in conjunction with the  unaudited pro forma condensed combined
financial information, including the notes thereto, appearing elsewhere in  this
Joint  Proxy Statement/Prospectus.  See "Incorporation  of Certain  Documents by
Reference" and "Unaudited Pro Forma Condensed Combined Financial Information."
    

    The  unaudited  pro  forma  combined   financial  data  are  presented   for
informational  purposes only  and are not  necessarily indicative  of the future
combined financial position or results of the future operations of the  combined
entity or the actual results or combined financial position that would have been
achieved  had  the  Merger  and  the  other  transactions  described  above been
consummated on  these dates  or prior  to the  periods presented.  In  addition,
results  for  the  nine months  ended  September  30, 1995  are  not necessarily
indicative of results expected for the entire year.

                                       22
<PAGE>
                     HISTORICAL SELECTED FINANCIAL DATA OF
                            FIRST BANK SYSTEM, INC.

   
<TABLE>
<CAPTION>
                                                 NINE MONTHS ENDED
                                                   SEPTEMBER 30,                     YEAR ENDED DECEMBER 31,
                                                --------------------  -----------------------------------------------------
                                                  1995       1994     1994 (4)   1993 (5)   1992 (6)     1991       1990
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                          (IN MILLIONS, EXCEPT PER SHARE AMOUNTS AND PERCENTAGES)
<S>                                             <C>        <C>        <C>        <C>        <C>        <C>        <C>
CONSOLIDATED INCOME STATEMENT DATA
Interest income...............................  $ 1,903.0  $ 1,668.2  $ 2,288.1  $ 2,134.5  $ 2,106.1  $ 2,369.0  $ 2,745.3
Interest expense..............................      823.1      615.4      868.7      796.3      953.1    1,354.2    1,844.2
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
      Net interest income.....................    1,079.9    1,052.8    1,419.4    1,338.2    1,153.0    1,014.8      901.1
Provision for credit losses...................       84.0       79.6      123.6      133.1      191.7      210.2      219.7
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net interest income after provision for credit
 losses.......................................      995.9      973.2    1,295.8    1,205.1      961.3      804.6      681.4
Noninterest income............................      585.8      497.5      558.9      618.9      613.7      557.0      472.1
Noninterest expense...........................      918.6      913.7    1,349.4    1,264.7    1,246.3    1,067.9    1,063.0
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income from continuing operations before
 income taxes and cumulative effect of changes
 in accounting principles.....................      663.1      557.0      505.3      559.3      328.7      293.7       90.5
Applicable income taxes.......................      245.7      210.1      191.8      198.6      115.7       30.3        6.5
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income from continuing operations before
 cumulative effect of accounting changes......      417.4      346.9      313.5      360.7      213.0      263.4       84.0
(Loss) income from discontinued operations
 (1)..........................................     --           (6.6)      (8.5)       2.5        2.7        1.1        0.6
Cumulative effect of accounting changes.......     --         --         --         --          233.2     --            1.0
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net income....................................  $   417.4  $   340.3  $   305.0  $   363.2  $   448.9  $   264.5  $    85.6
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                ---------  ---------  ---------  ---------  ---------  ---------  ---------

Average common and common equivalent shares...      135.0      136.0      136.3      134.6      124.7      117.3      106.1

PER COMMON SHARE

Income from continuing operations before
 cumulative effect of changes in accounting
 principles...................................  $    3.05  $    2.47  $    2.21  $    2.46  $    1.46  $    2.00  $    0.53
Net income....................................       3.05       2.43       2.15       2.48       3.35       2.01       0.55
Dividends paid................................     1.0875       0.87       1.16       1.00       0.88       0.82       0.82
Common shareholders' equity...................      20.33      19.77      18.63      18.91      17.89      14.67      13.28

CONSOLIDATED BALANCE SHEET DATA AT PERIOD END
Assets........................................  $  32,958  $  34,364  $  34,128  $  33,370  $  32,758  $  28,508  $  29,339
Securities....................................      3,302      3,990      5,185      5,030      6,092      4,744      5,061
Loans.........................................     25,877     24,360     24,556     23,497     20,692     18,766     18,870
Deposits......................................     21,895     24,299     24,256     26,386     26,395     22,969     22,772
Long-term debt................................      3,127      2,730      2,981      2,070      1,151      1,360      2,085
Shareholders' equity..........................      2,736      2,800      2,612      2,744      2,745      2,131      1,826

SELECTED FINANCIAL DATA AT PERIOD END
Common shareholders' equity to assets.........        8.0%       7.8%       7.3%       7.4%       7.2%       5.9%       5.1%
Total shareholders' equity to assets..........        8.3        8.1        7.7        8.2        8.4        7.5        6.2
Tier 1 capital ratio (2)......................        7.4        8.2        7.3        9.4        9.8        8.5        6.8
Total capital ratio (2).......................       12.3       12.2       11.4       13.4       13.0       11.3        9.7
Allowance for credit losses...................  $     469  $     478  $     475  $     466  $     484  $     453  $     484
    Percentage of loans.......................       1.81%      1.96%      1.93%      1.98%      2.34%      2.42%      2.57%
Nonperforming assets (3)......................  $     167  $     245  $     232  $     341  $     511  $     658  $     737
    Percentage of total assets................       0.51%      0.71%      0.68%      1.02%      1.56%      2.31%      2.51%

SELECTED FINANCIAL DATA FOR THE PERIOD
Return on average assets from continuing
 operations before cumulative effect of
 accounting changes...........................       1.70%      1.39%      0.93%      1.12%      0.74%      0.95%      0.28%
Return on average assets......................       1.70       1.36       0.91       1.13       1.56       0.96       0.29
Return on average common equity from
 continuing operations before cumulative
 effect of accounting changes.................       20.9       17.3       11.6       13.8        8.7       14.7        4.1
Return on average common equity...............       20.9       17.0       11.2       13.9       20.0       14.8        4.2
Net interest margin (taxable-equivalent
 basis).......................................       4.94       4.72       4.74       4.69       4.54       4.15       3.46
Net interest margin without taxable-equivalent
 increments...................................       4.89       4.67       4.69       4.63       4.45       4.01       3.29
</TABLE>
    

                See notes to historical selected financial data

                                       23
<PAGE>
                     HISTORICAL SELECTED FINANCIAL DATA OF
                            FIRST INTERSTATE BANCORP

   
<TABLE>
<CAPTION>
                                            NINE MONTHS ENDED
                                              SEPTEMBER 30,                        YEAR ENDED DECEMBER 31,
                                          ---------------------   ----------------------------------------------------------
                                          1995 (7)      1994      1994 (7)    1993 (8)      1992         1991      1990 (9)
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
                                                       (IN MILLIONS, EXCEPT PER SHARE AMOUNTS AND PERCENTAGES)
<S>                                       <C>         <C>         <C>         <C>         <C>         <C>          <C>
CONSOLIDATED INCOME STATEMENT DATA
Interest income.........................  $2,789.1    $2,329.8    $3,192.0    $2,944.2    $3,189.7    $3,935.3     $4,820.8
Interest expense........................     884.5       619.8       865.5       872.1     1,175.1     1,843.6      2,517.6
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
  Net interest income...................   1,904.6     1,710.0     2,326.5     2,072.1     2,014.6     2,091.7      2,303.2
Provision for credit losses.............     --          --          --          112.6       314.3       810.2        499.4
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
Net interest income after provision for
 credit losses..........................   1,904.6     1,710.0     2,326.5     1,959.5     1,700.3     1,281.5      1,803.8
Noninterest income......................     823.3       792.0     1,054.3       954.2       912.1     1,184.4      1,203.5
Noninterest expense.....................   1,638.3     1,659.6     2,197.8     2,032.4     2,209.2     2,732.2      2,562.3
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
Income (loss) before income taxes,
 extraordinary item and cumulative
 effect of accounting changes...........   1,089.6       842.4     1,183.0       881.3       403.2      (266.3)       445.0
Applicable income taxes.................     419.9       320.1       449.5       319.9       120.9        21.8          6.4
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
Income (loss) before extraordinary item
 and cumulative effect of accounting
 changes................................     669.7       522.3       733.5       561.4       282.3      (288.1)       438.6
Extraordinary item......................     --          --          --          (24.8)      --          --           --
Cumulative effect of accounting
 changes................................     --          --          --          200.1       --          --            30.1
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
Net income (loss).......................  $  669.7    $  522.3    $  733.5    $  736.7    $  282.3    $ (288.1)    $  468.7
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
                                          ---------   ---------   ---------   ---------   ---------   ----------   ---------
Average common and common equivalent
 shares.................................      77.2        81.7        80.4        77.0        69.1        62.5         58.9

PER COMMON SHARE
Income (loss) before extraordinary item
 and cumulative effect of accounting
 changes................................  $   8.36    $   6.09    $   8.71    $   6.68    $   3.23    $  (5.24)    $   6.79
Extraordinary item......................     --          --          --          (0.32)      --          --           --
Cumulative effect of accounting
 changes................................     --          --          --           2.60       --          --            0.51
Net income (loss).......................      8.36        6.09        8.71        8.96        3.23       (5.24)        7.30
Dividends paid..........................      2.30        2.00        2.75        1.60        1.20        1.80         3.00
Common shareholders' equity.............     47.95       41.24       41.59       41.36       35.04       32.57        39.78

CONSOLIDATED BALANCE SHEET DATA AT PERIOD END
Assets..................................  $ 55,067    $ 54,207    $ 55,813    $ 51,461    $ 50,863    $ 48,922     $ 51,356
Securities..............................     9,432      14,744      13,851      16,542      13,913       8,496        6,975
Loans...................................    35,967      30,331      33,222      25,988      24,201      28,182       33,007
Deposits................................    48,236      48,055      48,427      44,701      43,675      41,433       43,141
Long-term debt..........................     1,368       1,261       1,388       1,533       2,702       3,108        3,178
Shareholders' equity....................     3,981       3,550       3,436       3,548       3,251       2,639        2,868

SELECTED FINANCIAL DATA AT PERIOD END
Common shareholders' equity to assets...       6.6%        5.9%        5.5%        6.2%        5.2%        4.2%         4.8%
Total shareholders' equity to assets....       7.2         6.5         6.2         6.9         6.4         5.4          5.6
Tier 1 capital ratio (2)................       7.5         8.6         7.2         9.9         9.4         6.3          5.6
Total capital ratio (2).................      10.5        11.5        10.2        13.1        13.9        10.6          9.4
Allowance for credit losses.............  $    847    $    952    $    934    $  1,001    $  1,068    $  1,273     $  1,011
  Percentage of loans...................      2.35%       3.14%       2.81%       3.85%       4.41%       4.52%        3.06%
Nonperforming assets (3)................  $    206    $    291    $    258    $    309    $    751    $  1,588     $  1,749
  Percentage of total assets............      0.37%       0.54%       0.46%       0.60%       1.48%       3.25%        3.41%

SELECTED FINANCIAL DATA FOR THE PERIOD
Return on average assets before
 extraordinary item and cumulative
 effect of accounting changes...........      1.61%       1.33%       1.38%       1.14%       0.57%      (0.59)%       0.81%
Return on average assets................      1.61        1.33        1.38        1.49        0.57       (0.59)        0.86
Return on average common equity before
 extraordinary item and cumulative
 effect of accounting changes...........      25.4        20.1        21.6        17.3         9.6       (14.0)        18.2
Return on average common equity.........      25.4        20.1        21.6        23.2         9.6       (14.0)        19.6
Net interest margin (taxable-equivalent
 basis).................................      5.41        5.09        5.14        4.91        4.89        5.04         5.06
Net interest margin without taxable-
 equivalent increments..................      5.37        5.05        5.10        4.87        4.84        4.98         4.95
</TABLE>
    

                See notes to historical selected financial data

                                       24
<PAGE>
                     HISTORICAL SELECTED FINANCIAL DATA OF
                            FIRSTIER FINANCIAL, INC.

   
<TABLE>
<CAPTION>
                                                    NINE MONTHS ENDED
                                                      SEPTEMBER 30,                    YEAR ENDED DECEMBER 31,
                                                    -----------------   -----------------------------------------------------
                                                     1995      1994      1994      1993     1992 (10)   1991 (10)   1990 (10)
                                                    -------   -------   -------   -------   ---------   ---------   ---------
                                                             (IN MILLIONS, EXCEPT PER SHARE AMOUNTS AND PERCENTAGES)
<S>                                                 <C>       <C>       <C>       <C>       <C>         <C>         <C>
CONSOLIDATED INCOME STATEMENT DATA
Interest income...................................  $195.0    $171.0    $231.5    $223.8     $225.1      $251.6      $248.1
Interest expense..................................    94.5      69.6      97.1      92.0      103.4       142.8       155.1
                                                    -------   -------   -------   -------   ---------   ---------   ---------
  Net interest income.............................   100.5     101.4     134.4     131.8      121.7       108.8        93.0
Provision for credit losses.......................     0.8      (1.2)     (0.2)      5.4        9.7        10.7        27.1
                                                    -------   -------   -------   -------   ---------   ---------   ---------
Net interest income after provision for credit
 losses...........................................    99.7     102.6     134.6     126.4      112.0        98.1        65.9
Noninterest income................................    42.4      41.7      52.0      59.0       56.7        54.5        46.1
Noninterest expense...............................    84.0      87.7     118.1     115.4      109.1       107.0       110.2
                                                    -------   -------   -------   -------   ---------   ---------   ---------
Income before income taxes........................    58.1      56.6      68.5      70.0       59.6        45.6         1.8
Applicable income taxes...........................    15.5      15.2      17.6      18.8       16.2        11.0        (0.8)
                                                    -------   -------   -------   -------   ---------   ---------   ---------
Net income........................................  $ 42.6    $ 41.4    $ 50.9    $ 51.2     $ 43.4      $ 34.6      $  2.6
                                                    -------   -------   -------   -------   ---------   ---------   ---------
                                                    -------   -------   -------   -------   ---------   ---------   ---------

Average common and common equivalent shares.......    18.7      19.0      18.8      19.1       19.0        19.0        17.2

PER COMMON SHARE
Net income........................................  $ 2.28    $ 2.18    $ 2.69    $ 2.68     $ 2.30      $ 1.85      $ 0.15
Dividends paid....................................    0.86      0.78      1.04      0.66       0.47        0.42        0.40
Common shareholders' equity.......................   20.30     18.43     18.53     17.30      15.09       13.22       11.97

CONSOLIDATED BALANCE SHEET DATA AT PERIOD END
Assets............................................  $3,585    $3,517    $3,540    $3,400     $3,302      $3,113      $3,076
Securities........................................   1,002       990       938     1,035        961         803         676
Loans.............................................   2,191     2,056     2,149     1,953      1,875       1,785       1,801
Deposits..........................................   2,776     2,624     2,815     2,721      2,776       2,552       2,583
Long-term debt....................................     164       148       154        38         23          47          35
Shareholders' equity..............................     376       343       342       326        284         248         206

SELECTED FINANCIAL DATA AT PERIOD END
Common shareholders' equity to assets.............    10.5%      9.7%      9.7%      9.6%       8.6%        8.0%        6.7%
Total shareholders' equity to assets..............    10.5       9.7       9.7       9.6        8.6         8.0         6.7
Tier 1 capital ratio (2)..........................    15.0      14.2      13.5      14.0       13.3        11.5         9.8
Total capital ratio (2)...........................    16.3      15.5      14.8      15.2       14.6        12.8        11.3
Allowance for credit losses.......................  $   52    $   53    $   53    $   54     $   50      $   46      $   43
  Percentage of loans.............................    2.38%     2.59%     2.48%     2.78%      2.69%       2.71%       2.39%
Nonperforming assets (3)..........................  $   12    $   15    $   14    $   18     $   28      $   31      $   29
  Percentage of total assets......................    0.34%     0.41%     0.40%     0.53%      0.85%       1.00%       0.94%

SELECTED FINANCIAL DATA FOR THE PERIOD
Return on average assets..........................    1.59%     1.62%     1.47%     1.54%      1.40%       1.14%       0.09%
Return on average common equity...................    15.9      16.4      14.9      16.6       16.4        14.8         1.2
Net interest margin (taxable-equivalent basis)....    4.46      4.68      4.61      4.73       4.71        4.25        4.02
Net interest margin without taxable-equivalent
 increments.......................................    4.11      4.35      4.26      4.63       4.35        4.01        3.75
</TABLE>
    

                See notes to historical selected financial data

                                       25
<PAGE>
                  NOTES TO HISTORICAL SELECTED FINANCIAL DATA

 (1)  FBS acquired Edina Realty,  Inc., a real estate  brokerage, as part of its
    merger with Metropolitan Financial Corporation on January 24, 1995.  Because
    of  regulatory restrictions on non-banking  activities, FBS has entered into
    an agreement  to sell  Edina Realty,  Inc. Accordingly,  its operations  are
    accounted for as discontinued operations.

 (2)  Capital ratios are computed based on  1992 Federal Reserve Board rules and
    regulations, as in effect in 1992.

 (3) Includes non accrual and restructured loans, other nonperforming assets and
    other real estate owned.

 (4) Financial results for FBS for 1994 include charges with an after-tax effect
    of $156.9  million  ($1.15  per  share)  associated  with  the  merger  with
    Metropolitan Financial Corporation.

 (5)  The FBS results of operations for the year ended December 31, 1993 include
    merger-related charges of $50.0  million ($.37 per  share), on an  after-tax
    basis,  associated with  FBS's acquisition of  Colorado National Bankshares,
    Inc.

 (6) The FBS results of operations for the year ended December 31, 1992  include
    merger-related  charges of $81.8  million ($.66 per  share), on an after-tax
    basis, associated  with  FBS's  acquisition of  Western  Capital  Investment
    Corporation and Bank Shares Incorporated. The results of operations for that
    year  also  include the  effect of  adopting  two new  accounting standards:
    Statement of Financial  Accounting Standards No.  ("SFAS") 109,  "Accounting
    for  Income Taxes," and SFAS  106, "Employers' Accounting for Postretirement
    Benefits Other than Pensions."  The cumulative effect  of adopting SFAS  109
    was  an increase of $264.8  million in net income.  The cumulative effect of
    adopting SFAS 106 was a decrease of $31.6 million in net income.

 (7) The  First Interstate  results  of operations  for  the nine  months  ended
    September  30, 1995 and the year  ended December 31, 1994, include after-tax
    charges of  $9.5 million  and $87.6  million, respectively,  related to  the
    adoption  of a restructuring plan to  improve efficiency and better position
    First Interstate for the introduction of full interstate banking.

 (8) First Interstate's 1993 financial results include an extraordinary loss  of
    $24.8  million related to the early extinguishment of debt. Also included in
    1993 is the effect of adopting SFAS 109 and SFAS 106. The cumulative  effect
    of  adopting SFAS 109 was  an increase of $305.0  million in net income. The
    cumulative effect of adopting SFAS 106  was a decrease of $104.9 million  in
    net income.

 (9)  First Interstate's 1990  financial results include  the effect of adopting
    SFAS No.  96,  "Accounting  for  Income Taxes."  The  cumulative  effect  of
    adopting SFAS 96 was an increase of $30.1 million in net income.

(10) Historical Selected Financial Data for FirsTier for the year ended December
    31,  1990  has  not  been  restated  to  reflect  FirsTier's  acquisition of
    Cornerstone Bank  Group,  Inc. ("CBG").  Tier  1 capital  ratios  and  total
    capital  ratios have not been restated to reflect the acquisition of CBG for
    the years ended December 31, 1992 and 1991. In addition, net interest margin
    (taxable-equivalent basis) and net interest margin without
    taxable-equivalent  increments  have  not  been  restated  to  reflect   the
    acquisition  of CBG for the year ended  December 31, 1991. The effect of the
    restatement would not be material.

                                       26
<PAGE>
              UNAUDITED PRO FORMA COMBINED SELECTED FINANCIAL DATA
                          OF FIRST BANK SYSTEM, INC.,
                          FIRST INTERSTATE BANCORP AND
                          FIRSTIER FINANCIAL, INC. (1)

   
<TABLE>
<CAPTION>
                                                     NINE MONTHS
                                                        ENDED            YEAR ENDED DECEMBER 31,
                                                    SEPTEMBER 30,   ---------------------------------
                                                        1995          1994        1993        1992
                                                    -------------   ---------   ---------   ---------
                                                       (IN MILLIONS, EXCEPT PER SHARE AMOUNTS AND
                                                                      PERCENTAGES)
<S>                                                 <C>             <C>         <C>         <C>
CONSOLIDATED INCOME STATEMENT DATA
Interest income...................................    $4,887.1      $5,711.6    $5,078.7    $5,295.8
Interest expense..................................     1,817.1       1,848.1     1,668.4     2,128.2
                                                    -------------   ---------   ---------   ---------
  Net interest income.............................     3,070.0       3,863.5     3,410.3     3,167.6
Provision for credit losses.......................        84.8         123.4       245.7       506.0
                                                    -------------   ---------   ---------   ---------
Net interest income after provision for credit
 losses...........................................     2,985.2       3,740.1     3,164.6     2,661.6
Noninterest income................................     1,451.5       1,665.2     1,573.1     1,525.8
Noninterest expense...............................     2,653.6       3,682.2     3,297.1     3,455.5
                                                    -------------   ---------   ---------   ---------
Income from continuing operations before income
 taxes, extraordinary item and cumulative effect
 of accounting changes............................     1,783.1       1,723.1     1,440.6       731.9
Applicable income taxes...........................       675.5         652.5       518.5       236.6
                                                    -------------   ---------   ---------   ---------
Income from continuing operations before
 extraordinary item and cumulative effect of
 accounting changes...............................    $1,107.6      $1,070.6    $  922.1    $  495.3
                                                    -------------   ---------   ---------   ---------
                                                    -------------   ---------   ---------   ---------

Average common and common equivalent shares.......       344.5         353.7       343.1       312.7

PER COMMON SHARE
Income from continuing operations before
 extraordinary item and cumulative effect of
 changes in accounting principles.................    $   3.13      $   2.90    $   2.47    $   1.29
Dividends paid....................................      1.0875          1.16        1.00        0.88
Common shareholders' equity.......................       19.76         17.72       17.09       15.25

CONSOLIDATED BALANCE SHEET DATA AT PERIOD END
Assets............................................    $ 88,847      $ 93,853    $ 84,831    $ 83,621
Securities........................................       9,836        19,974      21,572      20,005
Loans.............................................      64,301        59,927      49,485      44,893
Deposits..........................................      73,637        75,498      71,087      70,070
Long-term debt....................................       4,669         4,523       3,603       3,853
Shareholders' equity..............................       7,138         6,405       6,292       5,996

SELECTED FINANCIAL DATA AT PERIOD END
Common shareholders' equity to assets.............         7.5%          6.3%        6.7%        6.0%
Total shareholders' equity to assets..............         8.0           6.8         7.4         7.2
Tier 1 capital ratio..............................         7.0           7.0         9.7         9.6
Total capital ratio...............................        10.8          10.4        13.2        13.5
Allowance for credit losses.......................    $  1,121      $  1,462    $  1,467    $  1,552
  Percentage of loans.............................        1.74%         2.44%       2.96%       3.46%
Nonperforming assets (2)..........................    $    385      $    504    $    650    $  1,262
  Percentage of total assets......................        0.43%         0.54%       0.77%       1.51%

SELECTED FINANCIAL DATA FOR THE PERIOD
Return on average assets from continuing
 operations before extraordianary item and
 cumulative effect of changes in accounting
 principles.......................................        1.60%         1.19%       1.13%       0.64%
Return on average common equity from continuing
 operations before extraordinary item and
 cumulative effect of changes in accounting
 principles.......................................        22.6          16.5        15.7         9.2
Net interest margin (taxable-equivalent basis)....        5.18          4.95        4.82        4.76
Net interest margin without taxable-equivalent
 increments.......................................        5.12          4.89        4.78        4.70
</TABLE>
    

       See notes to unaudited pro forma combined selected financial data

                                       27
<PAGE>
         NOTES TO UNAUDITED PRO FORMA COMBINED SELECTED FINANCIAL DATA

(1) The  Merger will  be accounted  for by  FBS under  the  pooling-of-interests
    method  of accounting in  accordance with APB No.  16 and, accordingly, this
    method has  been  applied in  the  unaudited pro  forma  condensed  combined
    financial  statements. Under this method of accounting, the recorded assets,
    liabilities, shareholders'  equity, income  and expenses  of FBS  and  First
    Interstate are combined and recorded at their historical amounts.

    The  FirsTier Acquisition  will be accounted  for by FBS  under the purchase
    method of accounting in  accordance with APB No.  16 and, accordingly,  this
    method  has  been  applied in  the  unaudited pro  forma  condensed combined
    financial statements. Under  this method of  accounting, the purchase  price
    will  be allocated to assets acquired and liabilities assumed based on their
    estimated fair values at the closing of the transaction. The historical cost
    of  FirsTier's  assets  and  liabilities  approximates  fair  value,  making
    mark-to-market  adjustments immaterial. Accordingly,  the historical cost of
    FirsTier's assets and  liabilities have  been combined  with the  historical
    consolidated balance sheet of FBS. Based on current estimates, the amount of
    intangible  assets relating to  FirsTier is $338  million, calculated as the
    purchase price of  $714 million  less FirsTier's September  30, 1995  common
    equity  of $376 million. Certain adjustments,  primarily to accrue for costs
    related to the FirsTier acquisition expected to be incurred within one  year
    of  the  closing,  are not  material  and  have not  been  reflected  in the
    unaudited pro forma condensed combined financial statements.

    Amortization expense relating to the FirsTier acquisition has been  included
    in  the  unaudited pro  forma combined  income statement  data for  the nine
    months ended  September 30,  1995  and the  year  ended December  31,  1994.
    Amortization expense was calculated based on the intangible asset balance of
    $338 million using the straight-line method over an average estimated period
    of benefit of 20 years.

   
    FBS  and First Interstate expect to achieve operating cost savings after the
    Effective  Time  by  various  means   including  reductions  in  staff   and
    consolidation  of certain data processing  and other back office operations.
    The operating cost savings are expected to be achieved in various amounts at
    various times during  the year  subsequent to  the closing  and not  ratably
    over,  or at the beginning  or end of, such  periods. No adjustment has been
    included in the unaudited pro forma condensed combined financial  statements
    for the anticipated operating cost savings.
    

    Pro  forma adjustments  related to the  Merger and  the FirsTier Acquisition
    represent management's best estimate based  on all available information  at
    this  time. These adjustments  may change as  additional information becomes
    available.  See   "Unaudited   Pro  Forma   Condensed   Combined   Financial
    Information" for additional details on these adjustments.

(2)  Nonperforming  assets  include  nonaccrual  and  restructured  loans, other
    nonperforming assets and other real estate owned.

                                       28
<PAGE>
                        NEW FIRST INTERSTATE FORECASTED
                      CONSOLIDATED STATEMENT OF OPERATIONS

   
    The following forecast was not prepared  with a view toward compliance  with
published  guidelines of the  Commission or the  American Institute of Certified
Public  Accountants  regarding  forecasts   or  generally  accepted   accounting
principles.  However, the  forecast complies in  all material  respects with the
published guidelines of the Commission  and the AICPA regarding such  forecasts,
other than the exclusion of a balance sheet and a summary of significant changes
in  financial position. Ernst &  Young LLP, the independent  auditors of FBS and
First Interstate, has not examined,  reviewed, compiled, or applied  agreed-upon
procedures to the forecast and, consequently, does not express an opinion or any
other  form of assurance with respect thereto and assumes no responsibility with
respect thereto. FBS and First Interstate believe, however, that, other than the
exclusion of  merger-related  charges, the  forecast  is presented  on  a  basis
consistent  with  generally accepted  accounting  principles as  applied  to the
historical financial statements of FBS and First Interstate. In connection  with
the  Merger, FBS expects to incur  merger-related costs as follows: $175 million
for severance, $40 million for occupancy/ equipment write-offs, $210 million for
conversion costs, and $50 million for other merger-related charges. In addition,
the combined  allowance for  credit losses  is expected  to be  reduced by  $250
million  to  conform  First  Interstate's reserve  methodology  to  that  of FBS
following the Merger. These amounts,  which total $135 million (net  after-tax),
have  not been reflected in the  forecasted consolidated statement of operations
because they are  expected to be  nonrecurring. These forecasts  are based  upon
certain  of the forecasts  provided to the respective  financial advisors of FBS
and First Interstate. The forecast  necessarily is based upon several  estimates
and  assumptions that, while presented with numerical specificity and considered
reasonable by FBS and  First Interstate, are  inherently subject to  significant
business,  economic  and competitive  uncertainties  and contingencies,  many of
which are  beyond the  control  of either  company,  and upon  assumptions  with
respect  to  future  business decisions  that  are subject  to  change. Material
assumptions made in this forecast are set forth below. FBS and First  Interstate
believe  that all  such assumptions are  reasonable; however,  such forecast and
assumptions  are  not  necessarily  indicative  of  current  values  or   future
performance, which may be significantly less favorable or more favorable than as
set  forth below. Although the  forecast reflects the best  estimates by FBS and
First Interstate, for which each of FBS  and First Interstate believes it had  a
reasonable  basis as  of the  time of the  preparation thereof,  of the combined
results of operations after giving effect to the Merger, it is only an estimate,
and actual results may vary considerably from the forecast. Shareholders of  FBS
and First Interstate are cautioned not to place undue reliance on the forecast.
    

   
<TABLE>
<CAPTION>
                                                                                         YEAR ENDED DECEMBER 31,
                                                                                     -------------------------------
                                                                                       1996       1997       1998
                                                                                     ---------  ---------  ---------
                                                                                          (DOLLARS IN MILLIONS,
                                                                                         EXCEPT PER SHARE DATA)
<S>                                                                                  <C>        <C>        <C>
Interest Income (taxable-equivalent basis).........................................  $   6,706  $   7,060  $   7,496
Interest Expense...................................................................      2,400      2,639      2,920
                                                                                     ---------  ---------  ---------
Net Interest Income................................................................      4,306      4,421      4,576
Provision for Loan Losses..........................................................        330        411        493
                                                                                     ---------  ---------  ---------
Net Interest Income after Provision for Loan Losses................................      3,976      4,010      4,083
Noninterest Income.................................................................      2,066      2,291      2,464
Noninterest Expense................................................................      3,285      3,106      3,169
                                                                                     ---------  ---------  ---------
Income before Income Taxes and Taxable-Equivalent Adjustments......................      2,757      3,195      3,378
Income Taxes and Taxable-Equivalent Adjustments....................................      1,056      1,224      1,295
                                                                                     ---------  ---------  ---------
Net Income.........................................................................      1,701      1,971      2,083
Dividends on Preferred Stock.......................................................         31         31         31
                                                                                     ---------  ---------  ---------
Net Income Applicable to Common Shareholders.......................................  $   1,670  $   1,940  $   2,052
                                                                                     ---------  ---------  ---------
                                                                                     ---------  ---------  ---------
Earnings per Common Share..........................................................  $    4.86  $    6.09  $    6.99
Average Common Shares (in millions)................................................      343.5      318.6      293.5
</TABLE>
    

                                       29
<PAGE>
            NOTES TO FORECASTED CONSOLIDATED STATEMENT OF OPERATIONS

   
    The forecast is based upon assumptions that the managements of FBS and First
Interstate  believe  provide  a  reasonable basis  for  presenting  the combined
operations of New First Interstate. The selected assumptions described below are
those that the managements of FBS  and First Interstate believe are  significant
to  the forecast  or are  the key factors  upon which  the results  shown in the
forecast depend. However, not all assumptions  used in the preparation of  these
statements  have  been  set  forth  below.  The  forecast  was  prepared  by the
managements of  FBS and  First Interstate  in good  faith and  is based  upon  a
variety of estimates and assumptions that, although considered reasonable by the
managements  of FBS and First Interstate, may not be achieved and are inherently
subject  to   significant  business,   economic,  regulatory   and   competitive
uncertainties  and contingencies, including possible competitive responses, many
of which are not within  the control of either company  and are not possible  to
assess  accurately,  and  upon  assumptions  with  respect  to  future  business
decisions that are  subject to  change. Therefore, the  actual results  achieved
during  the forecast period will vary from  those set forth in the forecast, and
the variations may be material. FBS  and First Interstate have no obligation  to
update  or otherwise revise the forecast to reflect circumstances existing after
the date hereof or  to reflect the occurrence  of unanticipated events, even  in
the  event that the assumptions underlying the forecast have been shown to be in
error, except as  required by applicable  law prior to  the Effective Time.  The
forecast  should not be relied on for  any purpose other than in connection with
this Joint Proxy Statement/Prospectus. The forecast should be read together with
the information  contained  in  the  "Unaudited  Pro  Forma  Condensed  Combined
Financial  Information," and the Consolidated Financial Statements of FBS, First
Interstate and FirstTier and  the related notes  incorporated by reference  into
this  Joint Proxy Statement/Prospectus. The following  is a summary of the basis
of presentation and selected assumptions:
    

   
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
    

   
    The financial forecasts  were prepared  on the basis  of generally  accepted
accounting  principles  (other  than  the  exclusion  of  merger-related charges
totalling $135 million (net after-tax), which charges are excluded because  they
are  expected to be nonrecurring),  which are the same  as those used to prepare
the historical financial statements of the companies.
    

   
SUMMARY OF SIGNIFICANT ASSUMPTIONS
    

    1.   The  combined  forecasts  were  derived  from  the  internal  long-term
       financial  plans of FBS and First  Interstate that were prepared prior to
       the execution of the Merger Agreement  as part of the ongoing  management
       process.

   
    2.   The Merger is consummated on March 31, 1996, and is accounted for under
       the  pooling-of-interests  method  of   accounting  in  accordance   with
       generally accepted accounting principles.
    

   
    3.   FBS completes the pending FirsTier Acquisition in February 1996 and the
       Corporate Trust Acquisition during 1996.
    

   
    4.  The  projected cost  takeouts and operational  efficiencies expected  by
       management  are achieved in 1996 and 1997. The total annual cost takeouts
       are $500 million (pre-tax) when fully implemented in 1997.  Approximately
       50  percent of the  ultimate cost savings are  achieved in 1996, assuming
       system conversion early in the third quarter thereof.
    

   
    5.  The  general assumptions used  in preparing the  FBS internal  long-term
       financial plan are as follows:
    

   
        a)  Economic outlook anticipates moderate growth during 1996-1998.
    

   
        b)    Annual inflation  rate of  approximately  3% with  stable interest
           rates.
    

   
        c)  Assumes consummation of  the FirsTier Acquisition and the  Corporate
           Trust Acquisition.
    

   
        d)  Net Interest Margin remains essentially flat.
    

   
        e)   Excluding residential first mortgages and acquisitions, loan growth
           is forecast at a compound annual rate 6.9%.
    

   
        f)  Excluding acquisitions, core deposits are stable.
    

                                       30
<PAGE>
   
    6.  The general assumptions used in preparing the First Interstate  internal
       long-term financial plan are as follows:
    

   
        a)  Net Interest Margin remains essentially flat.
    

   
        b)  Loan growth is projected at a compound annual rate of approx. 6.0%.
    

   
        c)   Core deposits  are projected to  grow at a  compound annual rate of
           3.8%.
    

   
    7.  No  adjustments were made  for projected revenue  growth above what  was
       originally included in the individual long-term financial plans. However,
       FBS  and First Interstate believe that  merging the balance sheets of FBS
       and First Interstate would immediately generate approximately $44 million
       in additional revenue annually  because FBS would  replace $4 billion  of
       higher-cost  wholesale funding with First Interstate's low-cost deposits,
       generating $32  million  in revenue.  An  additional $12  million  annual
       revenue  gain would result from funding  FBS's 1996 projected loan growth
       of $1.5 billion with First Interstate's core funding. The application  of
       FBS's cross-product marketing approach across First Interstate's customer
       base  also represents  an area of  possible future  revenue growth. First
       Interstate currently sells approximately  2.6 products per household,  as
       compared  to 3.9  product per household  for FBS. Assuming  the number of
       products sold to  First Interstate  customers could be  increased to  the
       same  number  per household  as that  in effect  for FBS,  the additional
       annual revenue potential could be as much as $900 million annually.  This
       additional  revenue  figure  is based  on  a variety  of  FBS assumptions
       regarding the  mix and  profitability of  the additional  products  sold,
       which  FBS believes to be reasonable, and would take a number of years to
       achieve.
    

   
        In  addition,  no   revenue  losses  were   projected  because   revenue
       loss/attrition is expected to be minimal. FBS and First Interstate do not
       expect  there to be a significant number of branch closings/mergers which
       is one of the primary causes of deposit and revenue attrition.
    

   
    8.  The forecast assumes FBS  will continue its capital management  program.
       Under  such  program, FBS  manages excess  capital  that may  result from
       future earnings  retained  that  cannot  otherwise  be  reinvested  at  a
       suitable  return  by  buying shares  of  FBS Common  Stock.  The forecast
       assumes that approximately 14 million shares will be repurchased in  1996
       under  the existing FBS  Board-authorized repurchase programs, predicated
       on future excess capital. Repurchases of approximately 37 million  shares
       and 22 million shares are assumed in 1997 and 1998, respectively, and are
       subject  to such excess capital  and appropriate FBS Board authorization.
       In addition, no  business combinations accounted  for under the  purchase
       method  of accounting are  assumed during the  forecast periods, with the
       exception of  the  FirsTier  Acquisition.  FBS will  not  make  (and  the
       forecasts do not include) any share buybacks that in the opinion of FBS's
       management   would   affect  the   accounting   for  the   Merger   as  a
       pooling-of-interests. In addition, FBS will not purchase treasury  shares
       under  its  existing authorizations  during the  90 day  period following
       consummation of the Merger. Although  the forecast assumes future  excess
       capital retention, such excess is not assured.
    

                                       31
<PAGE>
                 INFORMATION CONCERNING THE FBS SPECIAL MEETING

GENERAL

    This  Joint Proxy Statement/Prospectus is being  furnished to holders of FBS
Common Stock as part of the solicitation of proxies by the FBS Board for use  at
the  FBS Special Meeting to be held  on               , 1996 at
       , Minneapolis, Minnesota. This  Joint Proxy Statement/Prospectus and  the
accompanying Proxy Card are first being mailed to holders of FBS Common Stock on
or about                  .

   
    The  purpose of the FBS Special Meeting is to consider and vote upon (a) the
FBS Vote  Matters, such  matters being  proposals to  approve (i)  the  Proposed
Issuance  of up to     shares of FBS Common Stock to holders of First Interstate
Common Stock upon the effectiveness of the Merger; (ii) an amendment to the  FBS
Certificate   to  change  its  name  to  "First  Interstate  Bancorp"  upon  the
effectiveness of the Merger;  and (iii) an amendment  to the FBS Certificate  to
increase the number of authorized shares of FBS Common Stock from 200,000,000 to
500,000,000  and the  number of  authorized shares  of FBS  preferred stock from
10,000,000 to 15,000,000 immediately  prior to the  effectiveness of the  Merger
and (b) such other matters as may properly come before the FBS Special Meeting.
    

   
    Based  on the number of shares  of First Interstate Common Stock outstanding
on the First Interstate Record Date, consummation of the Merger would result  in
the  issuance of         shares of New First  Interstate Common Stock to persons
other than FBS (approximately     % of the total number of shares of FBS  Common
Stock  outstanding at September 30, 1995, after giving effect to such issuance).
Based on  the total  number of  shares and  rights to  acquire shares  of  First
Interstate  Common Stock outstanding on such record date, a maximum aggregate of
      shares of New  First Interstate Common  Stock could be  issued to  persons
other than FBS in the Merger, or approximately     % of the New First Interstate
Common  Stock outstanding after consummation of  the Merger (based on the number
of shares of FBS Common Stock and  rights to acquire shares of FBS Common  Stock
outstanding at September 30, 1995).
    

    The principal purpose and effect of the amendment to increase the authorized
number of shares of FBS Common Stock to 500,000,000 and the authorized number of
shares  of  preferred  stock of  FBS  to 15,000,000  will  be to  provide  for a
sufficient number of shares of New First Interstate Common Stock for issuance to
shareholders of  First Interstate  in  the Merger  and to  authorize  additional
shares  of capital stock that  may be issued upon the  approval of the New First
Interstate Board without  further shareholder approval.  See "Amendments to  New
First Interstate Certificate of Incorporation."

    Approval  of each of the FBS Vote Matters is contingent upon the approval of
each of  the other  FBS Vote  Matters.  The Merger  is subject  to a  number  of
conditions,  including  the  receipt  of  required  regulatory  and  shareholder
approvals. See "The Merger -- Conditions to Consummation of the Merger" and  "--
Regulatory Approvals Required."

SOLICITATION, VOTING AND REVOCABILITY OF PROXIES

    The  FBS Board has fixed the close  of business on               , 1995 (the
"FBS Record Date") as the record date for the determination of the  shareholders
of  FBS entitled to  notice of and  to vote at  the FBS Special  Meeting and any
adjournments or postponements  thereof. Accordingly, only  holders of record  of
shares  of  FBS Common  Stock at  the close  of  business on  such date  will be
entitled  to  vote  at  the  FBS   Special  Meeting  and  any  adjournments   or
postponements  thereof, with each share  entitling its owner to  one vote on all
matters properly presented at  the FBS Special Meeting  and any adjournments  or
postponements  thereof. On the FBS Record Date, there were  approximately
holders of record of the       shares of FBS Common Stock then outstanding.  The
presence,  in person or by proxy, of not less than one-third of the total number
of outstanding shares of FBS  Common Stock entitled to  vote at the FBS  Special
Meeting  is necessary to constitute  a quorum at the  FBS Special Meeting. Under
NYSE rules,  the Proposed  Issuance  of New  First  Interstate Common  Stock  as
contemplated by the Merger Agreement must be approved by a majority of the votes
cast at the FBS

                                       32
<PAGE>
Special  Meeting, and over 50% of the shares  of FBS Common Stock entitled to do
so must in fact  vote at the  FBS Special Meeting.  In addition, under  Delaware
law,  the  affirmative  vote of  at  least a  majority  of the  total  number of
outstanding shares of FBS Common Stock  entitled to vote is required to  approve
the  proposed Certificate Amendments. If an  executed proxy card is returned and
the shareholder has abstained from voting on any matter, the shares  represented
by such proxy will be considered present at the FBS Special Meeting for purposes
of  determining a quorum and for purposes  of calculating the vote, but will not
be considered to have been voted in favor of such matter. Under the rules of the
NYSE, brokers  who  hold  shares  in  street name  for  customers  who  are  the
beneficial  owners of  such shares  are prohibited from  giving a  proxy to vote
shares held for such customers on the  approval of the FBS Vote Matters  without
specific  instructions from  such customers.  Given that  the DGCL  requires the
affirmative vote of the holders of a  majority of the outstanding shares of  FBS
Common Stock entitled to vote on the proposed Certificate Amendments in order to
adopt  them, the failure of such customers to provide specific instructions with
respect to their shares of FBS Common  Stock to their broker will have the  same
effect  as  a  vote  against  the adoption  of  the  Certificate  Amendments. In
addition, such  a failure  will also  result in  a customer's  shares not  being
deemed  present  and voting  for  purposes of  the  NYSE rules  relating  to the
Proposed Issuance. FAILURE TO RETURN A  PROPERLY EXECUTED PROXY CARD OR TO  VOTE
AT  THE FBS  SPECIAL MEETING  WILL HAVE THE  SAME EFFECT  AS A  VOTE AGAINST THE
CERTIFICATE AMENDMENTS AND MAY PREVENT A  VOTE FROM BEING TAKEN ON THE  PROPOSED
ISSUANCE.

    It  is expected that all of the        shares of FBS Common Stock (excluding
shares subject to stock options)  beneficially owned by directors and  executive
officers  of FBS and their affiliates at the FBS Record Date (    % of the total
number of outstanding shares of FBS Common Stock at such date) will be voted for
approval of the FBS Vote  Matters. As of the  FBS Record Date, First  Interstate
owned          shares of  FBS Common  Stock (excluding shares  issuable to First
Interstate under  certain conditions  as described  under "The  Merger --  Stock
Option  Agreements"), and directors  and executive officers  of First Interstate
beneficially owned less  than       % of  the outstanding shares  of FBS  Common
Stock.

    If  the accompanying Proxy Card is properly  executed and returned to FBS in
time to be voted at the FBS Special Meeting, the shares represented thereby will
be voted  in  accordance with  the  instructions marked  thereon.  EXECUTED  BUT
UNMARKED  PROXIES WILL BE  VOTED FOR APPROVAL  OF THE FBS  VOTE MATTERS. The FBS
Board does not know of any matters  other than those described in the notice  of
the  FBS Special Meeting that are to come before the FBS Special Meeting. If any
other matters are properly  brought before the  FBS Special Meeting,  including,
among  other things, a motion to adjourn  or postpone the FBS Special Meeting to
another time and/or place  for the purpose of  soliciting additional proxies  in
favor of the proposal to approve the FBS Vote Matters or to permit dissemination
of  information  regarding  material  developments  relating  to  the  Merger or
otherwise germane to the FBS Special Meeting,  one or more of the persons  named
in  the proxy  card will  vote the  shares represented  by such  proxy upon such
matters as determined in their discretion, PROVIDED, HOWEVER, that no proxy that
is voted against the proposal to approve  the FBS Vote Matters will be voted  in
favor  of any  such adjournment  or postponement  for the  purpose of soliciting
additional proxies.

    THE BOARD OF DIRECTORS OF FBS  RECOMMENDS THAT THE SHAREHOLDERS OF FBS  VOTE
FOR APPROVAL OF THE FBS VOTE MATTERS.

   
    The  presence  of  a  shareholder  at  the  FBS  Special  Meeting  will  not
automatically revoke such shareholder's proxy. Any proxy given pursuant to  this
solicitation  may be revoked by the person giving it by giving written notice of
such revocation to  the Secretary  of FBS  at any time  before it  is voted,  by
delivering  to FBS or any other person  a duly executed, later-dated proxy or by
attending the FBS Special Meeting and  voting in person. All written notices  of
revocation  and other communications  with respect to  revocation of FBS proxies
should be addressed to: Lee R. Mitau, Secretary, First Bank System, Inc.,  First
Bank Place, 601 Second Avenue South, Minneapolis, Minnesota 55402-4302.
    

    The  cost of soliciting proxies for the FBS Special Meeting will be borne by
FBS,  except  that  the  cost  of   preparing  and  mailing  this  Joint   Proxy
Statement/Prospectus will be borne equally by FBS and

                                       33
<PAGE>
First  Interstate. In  addition to  use of the  mails, proxies  may be solicited
personally or by telephone, telegraph, facsimile or other means of communication
by directors,  officers  and  employees  of  FBS,  who  will  not  be  specially
compensated  for  such  activities, but  who  may be  reimbursed  for reasonable
out-of-pocket expenses  in  connection with  such  solicitation. FBS  will  also
request  persons, firms and  companies holding shares  in their names  or in the
name of their nominees,  which are beneficially owned  by others, to send  proxy
materials  to and obtain proxies from such beneficial owners. FBS will reimburse
such persons for their reasonable expenses incurred in that connection. FBS  has
retained  Morrow & Co., Inc. to assist in  the solicitation of proxies at a cost
of approximately $        , plus customary expenses.

          INFORMATION CONCERNING THE FIRST INTERSTATE SPECIAL MEETING

GENERAL

   
    This Joint Proxy Statement/Prospectus is being furnished to holders of First
Interstate Common Stock  as part  of the solicitation  of proxies  by the  First
Interstate  Board and by FBS for use  at the First Interstate Special Meeting to
be held on                ,  1996 at                and  at any adjournments  or
postponements   thereof.   This  Joint   Proxy  Statement/Prospectus,   and  the
accompanying Proxy Card, are being first mailed to First Interstate shareholders
on or about                , 1995. The purpose  of the First Interstate  Special
Meeting  is to consider and vote upon (i)  the proposal to approve and adopt the
Merger Agreement and the transactions  contemplated thereby and (ii) such  other
matters  as may properly come before the First Interstate Special Meeting or any
adjournments or postponements thereof.
    

SOLICITATION, VOTING AND REVOCABILITY OF PROXIES

    The First Interstate Board has fixed the close of business on
(the "First Interstate Record Date") as the record date for the determination of
the  shareholders of First Interstate  entitled to notice of  and to vote at the
First Interstate Special Meeting. Accordingly, only holders of record of  shares
of  First Interstate Common Stock at the close  of business on such date will be
entitled to  vote  at the  First  Interstate  Special Meeting  with  each  share
entitling  its owner to one vote on  each matter properly presented at the First
Interstate Special  Meeting. On  the First  Interstate Record  Date, there  were
approximately        holders  of record of the        shares of First Interstate
Common Stock then outstanding. The presence, in person or by proxy, of at  least
a  majority of the total number of outstanding shares of First Interstate Common
Stock entitled to vote at the  First Interstate Special Meeting is necessary  to
constitute a quorum at the First Interstate Special Meeting.

   
    Under Delaware law, the affirmative vote of at least a majority of the total
number  of outstanding shares of First  Interstate Common Stock entitled to vote
at the First  Interstate Special Meeting  is required to  approve and adopt  the
Merger Agreement. Shares represented by a properly executed proxy received prior
to  the vote  at the First  Interstate Special  Meeting and not  revoked will be
voted at the First  Interstate Special Meeting  as directed in  the proxy. IF  A
PROXY  IS SUBMITTED AND NO DIRECTIONS ARE GIVEN, THE PROXY WILL BE VOTED FOR THE
APPROVAL AND ADOPTION OF THE MERGER AGREEMENT AND THE TRANSACTIONS  CONTEMPLATED
THEREBY.  First Interstate  intends to count  shares of  First Interstate Common
Stock present in person at the First Interstate Special Meeting but not  voting,
and  shares of First Interstate  Common Stock for which  it has received proxies
but with respect to  which holders of  shares have abstained  on any matter,  as
present  at the First Interstate Special Meeting for purposes of determining the
presence or absence  of a quorum  for the transaction  of business. Because  the
affirmative vote of the holders of a majority of the outstanding shares of First
Interstate  Common Stock entitled to  vote on the Merger  is required to approve
and adopt the Merger Agreement  and the transactions contemplated thereby,  such
non-voting  shares and abstentions  will have the  effect of a  vote against the
approval of the  Merger Agreement.  In addition, under  the rules  of the  NYSE,
brokers  who hold  shares in  street name for  customers who  are the beneficial
owners of such shares are prohibited from giving a proxy to vote shares held for
such customers on  the approval  and adoption  of the  Merger Agreement  without
specific  instructions from such customers. Given that Delaware law requires the
affirmative
    

                                       34
<PAGE>
vote of the holders of a majority of the outstanding shares of First  Interstate
Common  Stock entitled to vote  on the Merger Agreement  in order to approve and
adopt the Merger Agreement,  the failure of such  customers to provide  specific
instructions  with respect to  their shares of First  Interstate Common Stock to
their broker will have the effect of a vote against the approval and adoption of
the Merger Agreement.  FAILURE TO RETURN  A PROPERLY EXECUTED  PROXY CARD OR  TO
VOTE AT THE FIRST INTERSTATE SPECIAL MEETING WILL HAVE THE SAME EFFECT AS A VOTE
AGAINST THE MERGER AGREEMENT.

    It is expected that all of the       shares of First Interstate Common Stock
(excluding  shares subject to stock options) beneficially owned by directors and
executive officers  of  First  Interstate  and their  affiliates  at  the  First
Interstate Record Date (    % of the total number of outstanding shares of First
Interstate Common Stock at such date) will be voted for approval and adoption of
the  Merger Agreement. As of the  First Interstate Record Date, FBS beneficially
owned       shares  of First Interstate Common Stock (excluding shares  issuable
to  FBS under certain conditions as described  under "The Merger -- Stock Option
Agreements"), all  of  which  were  Trust  Account  Shares,  and  directors  and
executive  officers of FBS beneficially owned less than     % of the outstanding
shares of First Interstate Common Stock.

    The First Interstate  Board does not  know of any  matters other than  those
described in the notice of the First Interstate Special Meeting that are to come
before  the First Interstate Special Meeting.  If any other matters are properly
brought before  the First  Interstate Special  Meeting, including,  among  other
things,  a motion to adjourn or postpone the First Interstate Special Meeting to
another time and/or place  for the purpose of  soliciting additional proxies  in
favor  of the proposal  to approve and  adopt the Merger  Agreement or to permit
dissemination of  information regarding  material developments  relating to  the
Merger or otherwise germane to the First Interstate Special Meeting, one or more
of  the persons named in the proxy card will vote the shares represented by such
proxy upon such matters as determined in their best judgment; PROVIDED, HOWEVER,
that no proxy that is voted against the proposal to approve and adopt the Merger
Agreement will be  voted in  favor of any  adjournment or  postponement for  the
purpose of soliciting additional proxies.

    THE  BOARD OF DIRECTORS OF FIRST INTERSTATE RECOMMENDS THAT THE SHAREHOLDERS
OF FIRST INTERSTATE VOTE FOR APPROVAL  AND ADOPTION OF THE MERGER AGREEMENT  AND
THE TRANSACTIONS CONTEMPLATED THEREBY.

    The  giving of  a proxy  does not  affect the  rights of  a holder  of First
Interstate Common Stock who attends the First Interstate Special Meeting to vote
at such meeting, since  a shareholder may  revoke his or her  proxy at any  time
before  it is voted  at the First  Interstate Special Meeting.  A shareholder of
record may revoke a proxy by filing  a written notice of revocation with  Edward
S.  Garlock, Secretary of First Interstate (633  West Fifth Street, TC 7-10, Los
Angeles, California 90071),  by filing  a duly  executed proxy  bearing a  later
date,  or  by  appearing at  the  First  Interstate Special  Meeting  in person,
notifying the Secretary, and  voting by ballot at  the First Interstate  Special
Meeting.  Any  shareholder  of  record attending  the  First  Interstate Special
Meeting may vote in person whether or not a proxy has been previously given, but
the mere presence  (without notifying  the Secretary)  of a  shareholder at  the
First  Interstate Special Meeting will not constitute revocation of a previously
given proxy. In addition, shareholders  whose shares of First Interstate  Common
Stock  are not registered  in their own name  will need additional documentation
from the record holder of such shares to vote personally at the First Interstate
Special Meeting.

    The cost of soliciting proxies for the First Interstate Special Meeting will
be borne by First Interstate, except that the cost of preparing and mailing this
Joint Proxy  Statement/Prospectus  will  be  borne  equally  by  FBS  and  First
Interstate. In addition to use of the mails, proxies may be solicited personally
or  by  telephone,  telegraph,  facsimile or  other  means  of  communication by
directors, officers and employees of First Interstate who will not be  specially
compensated  for  such  activities, but  who  may be  reimbursed  for reasonable
out-of-pocket expenses  in  connection  with  such  solicitation.  In  addition,
proxies  may be solicited  in the manner described  in the immediately preceding
sentence by directors, officers, employees and representatives of FBS, who  will
be compensated as set forth under

                                       35
<PAGE>
"Information  Concerning the  FBS Special  Meeting." First  Interstate will also
request persons, firms  and companies holding  shares in their  names or in  the
name  of their nominees, which  are beneficially owned by  others, to send proxy
materials to and obtain  proxies from such  beneficial owners. First  Interstate
will  reimburse  such persons  for their  reasonable  expenses incurred  in that
connection.

   
    First Interstate has retained Georgeson & Co., Inc. ("Georgeson") to  assist
First  Interstate in  connection with  its communications  with its shareholders
with respect to, and to provide other services to First Interstate in connection
with, the Merger  and the  Wells Offer.  Georgeson will  receive reasonable  and
customary  compensation  for  its services  and  reimbursement  of out-of-pocket
expenses in  connection  therewith. First  Interstate  has agreed  to  indemnify
Georgeson  against certain liabilities arising out  of or in connection with its
engagement.
    

    SHAREHOLDERS  OF  FIRST  INTERSTATE  ARE  INSTRUCTED  NOT  TO  SEND  IN  THE
INSTRUMENTS  REPRESENTING THEIR SECURITIES WITH THEIR PROXY CARDS. IF THE MERGER
IS CONSUMMATED,  SHAREHOLDERS  OF  FIRST INTERSTATE  WILL  RECEIVE  INSTRUCTIONS
REGARDING  THE PROPER PROCEDURES FOR THE  EXCHANGE OF SUCH INSTRUMENTS. SEE "THE
MERGER -- EXCHANGE OF CERTIFICATES AND DEPOSITARY RECEIPTS; FRACTIONAL SHARES."

                                       36
<PAGE>
                                   THE MERGER

    THE FOLLOWING  INFORMATION  RELATING  TO  THE MERGER  IS  QUALIFIED  IN  ITS
ENTIRETY BY REFERENCE TO THE OTHER INFORMATION CONTAINED ELSEWHERE IN THIS JOINT
PROXY  STATEMENT/PROSPECTUS, INCLUDING THE APPENDICES  HERETO, AND THE DOCUMENTS
INCORPORATED HEREIN BY REFERENCE. A COPY OF THE MERGER AGREEMENT (EXCLUDING  THE
EXHIBITS  AND SCHEDULES THERETO) IS SET FORTH  IN APPENDIX A TO THIS JOINT PROXY
STATEMENT/PROSPECTUS AND IS INCORPORATED HEREIN  BY REFERENCE, AND REFERENCE  IS
MADE THERETO FOR A COMPLETE DESCRIPTION OF THE TERMS OF THE MERGER. SHAREHOLDERS
ARE  URGED TO READ THE MERGER AGREEMENT  AND EACH OF THE OTHER APPENDICES HERETO
CAREFULLY.

GENERAL

    Subject to  the  terms  and  conditions of  the  Merger  Agreement,  at  the
Effective Time, Merger Sub will merge with and into First Interstate. Merger Sub
is  a wholly-owned subsidiary of  FBS that was incorporated  on November 3, 1995
solely as  a vehicle  to facilitate  the Merger.  First Interstate  will be  the
Surviving  Corporation in the Merger, and  will continue its corporate existence
under the DGCL under the name "Eleven Acquisition Corp." At the Effective  Time,
the  separate  corporate  existence  of Merger  Sub  will  terminate.  The First
Interstate Certificate  and the  First Interstate  Bylaws as  in effect  at  the
Effective   Time  will   be  the   certificate  of   incorporation  and  bylaws,
respectively, of  the  Surviving  Corporation. After  the  consummation  of  the
Merger, the Surviving Corporation will be a wholly-owned subsidiary of New First
Interstate.  Upon consummation of the Merger, FBS will change its name to "First
Interstate Bancorp."

EFFECTIVE TIME

    The Effective Time will be set forth in the Certificate of Merger that  will
be  filed with the Secretary of  State of the State of  Delaware on a date to be
specified by the parties,  which date will  be no later  than two business  days
after  the satisfaction or waiver  (subject to applicable law)  of the latest to
occur of  the  conditions  precedent to  the  Merger  set forth  in  the  Merger
Agreement.  FBS and  First Interstate  each anticipate  that the  Merger will be
consummated by             , 1996.

    Consummation of the Merger, however, could be delayed as a result of  delays
in  obtaining the Requisite Regulatory Approvals.  There can be no assurances as
to (i) if  or when such  approvals will be  obtained or that  if obtained,  such
approvals will satisfy the conditions to consummation of the Merger set forth in
the  Merger Agreement or (ii)  whether all of the  other conditions precedent to
the Merger will be satisfied or waived by  the party permitted to do so. If  the
Merger  is not  effected on  or before December  31, 1996  (subject to extension
under certain  circumstances set  forth  in the  Merger Agreement),  the  Merger
Agreement  may  be terminated  by  either FBS  or  First Interstate,  unless the
failure to effect the  Merger by such date  is due to the  failure of the  party
seeking  to terminate the  Merger Agreement to perform  or observe the covenants
and  agreements  of  such  party  set  forth  therein.  See  "--  Conditions  to
Consummation  of  the  Merger,"  "--  Regulatory  Approvals  Required"  and  "--
Termination of the Merger Agreement."

BACKGROUND OF THE MERGER

   
    On February  11,  1994,  Wells  delivered an  unsolicited  letter  to  First
Interstate  proposing a merger of the two companies in which each share of First
Interstate Common Stock would  be converted into common  stock, par value  $5.00
per share, of Wells (the "Wells Common Stock") with a then-current trading value
of  $90. After carefully  considering that proposal,  the First Interstate Board
determined to decline  to pursue a  merger with Wells  and instead to  implement
strategies aimed at enhancing shareholder value as an independent company.
    

    During  the remainder  of 1994  and throughout  the first  three quarters of
1995, First Interstate took  a number of actions  aimed at achieving this  goal.
These  actions included implementing a  corporate restructuring program designed
to rationalize  First  Interstate's  corporate  structure  and  achieve  greater
operating  efficiencies; announcing on  March 22, 1994  a repurchase program for
eight

                                       37
<PAGE>
million shares of First Interstate Common Stock which was completed in  November
1994;  and  completing  a  series  of  acquisitions  designed  to  enhance First
Interstate's competitive position in certain key markets.

    As these various strategies  were implemented, First Interstate's  business,
financial  condition and  results of operations  all continued  to improve. This
improvement was reflected  in the market  price of the  First Interstate  Common
Stock,  which rose from $63 1/4 on January  3, 1994 to $100 3/4 on September 29,
1995.

    Throughout this  period,  the  First Interstate  Board  considered  possible
alternative  strategies  for  enhancing shareholder  value.  These  included the
alternative of remaining independent,  as well as the  alternative of seeking  a
strategic partnership with either a larger or similar-sized bank holding company
with  a  similar strategic  focus and  business  strengths complementary  to and
compatible with those of First  Interstate. With respect to potential  strategic
partnerships,  the First Interstate Board  continued to consider the possibility
of a  transaction  with  Wells,  as  well as  the  possibility  of  a  strategic
partnership  with one of several other companies (including FBS) which, unlike a
strategic partnership with Wells,  would serve to  further the First  Interstate
Board's  goal of reducing the risk profile of First Interstate by achieving even
greater geographic diversification.

    As part  of  First Interstate's  assessment  of which  strategy  would  best
enhance  shareholder  value, Mr.  William E.  B. Siart,  the Chairman  and Chief
Executive Officer of First Interstate, from time to time engaged in  exploratory
conversations with his counterparts at various other large regional bank holding
companies,  including  FBS, concerning  the  respective strategic  directions of
First Interstate and  such other  company, the  degree to  which such  strategic
directions  were compatible, and the level  of interest which such other company
might have in a  potential strategic partnership  with First Interstate.  During
the  first  quarter of  1995, general  discussions  were held  with Mr.  John F.
Grundhofer, the  Chairman and  Chief Executive  Officer of  FBS, concerning  the
strategic advantages of a possible combination. However, none of the discussions
described  in this paragraph were conducted with the aim of generating, and none
resulted in, a firm merger proposal  being submitted to First Interstate or  any
merger proposal being considered by the First Interstate Board.

    As  the pace of consolidation in  the banking industry reached unprecedented
levels during  the  first  half  of  1995,  Mr.  Siart  initiated  a  series  of
discussions  at  which the  First Interstate  Board  would continue  its ongoing
review of the appropriate strategic direction  for First Interstate in light  of
the significant changes affecting the industry. At the April 28, 1995 meeting of
the  First Interstate Board,  Mr. Siart announced that  at future Board meetings
management  would  discuss  its  views  concerning  the  strategic  alternatives
available  to First Interstate  and the critical elements  that would affect the
Board's selection  of the  strategic  alternative which  would  be in  the  best
interests  of First Interstate  and its shareholders.  The first such discussion
was held at the July 17, 1995 meeting of the First Interstate Board.

    In August 1995, Messrs. Siart and Grundhofer met at Mr. Grundhofer's request
and discussed corporate  strategic compatibility and  management philosophy.  On
September  7,  1995, Mr.  Siart met  with  Mr. Paul  Hazen, the  Chief Executive
Officer and Chairman  of the Board  of Wells,  at Mr. Hazen's  request. At  this
meeting, Mr. Hazen stated his belief that a merger of First Interstate and Wells
was  very  compelling. He  also stated  that  after evaluating  Wells' strategic
alternatives, Wells had concluded that such a merger was a strategic  imperative
to  Wells and  that no alternative  would provide values  to Wells' shareholders
which were comparable to the  values which could be  achieved in such a  merger.
Mr.  Hazen then suggested that Mr. Siart  could serve as the President and Chief
Operating  Officer  of  the  combined   company,  and  that  the  merger   would
significantly enhance shareholder value for each company's shareholders. In this
regard, he noted that Wells had performed extensive analyses of the cost savings
and  operating efficiencies  which could  be achieved  by consolidating  the two
companies' respective California branch systems.

                                       38
<PAGE>
    At the conclusion of the meeting,  Mr. Hazen suggested a second meeting  for
purposes  of  reviewing  Wells'  analyses  in  detail.  Mr.  Siart  responded by
explaining the process for reviewing strategic alternatives previously commenced
by the First Interstate  Board. In particular,  he summarized the  presentations
made at the July Board meeting, his expectations regarding the subject matter of
the  presentation which would be  made to the First  Interstate Board in October
(which  presentation  was  to  include  an  assessment  of  potential  strategic
partners,  including Wells), and the  additional future presentations which were
expected to  be made  to  the First  Interstate  Board concerning,  among  other
matters,  developments in technology and non-bank financial providers. Mr. Hazen
then inquired as  to Mr. Siart's  expectations concerning how  long the  Board's
process  for reviewing  strategic alternatives  would take.  Mr. Siart responded
that although he  was not sure,  his best guess  was that the  process would  be
complete  in approximately six months (although it could take as few as four and
as many as nine months). Mr. Hazen  again suggested a second meeting to  discuss
Wells'  analyses in detail, and Mr. Siart responded that he believed that it was
more important  for  Mr.  Hazen and  him  to  determine if  the  two  companies'
management  philosophies and strategic outlooks were compatible. On the same day
as the meeting, Mr. Siart  called Mr. Hazen and  scheduled a second meeting  for
October 30, 1995.

   
    On  October 17, 1995,  the First Interstate Board  met and reviewed possible
strategic partnerships with five large  bank holding companies, including  Wells
and  FBS. The  advantages and disadvantages  of a transaction  with each company
were reviewed. In particular, Mr. Siart provided an overview, in terms of  stock
price,  market value,  total assets, total  deposits and common  equity of First
Interstate and  the five  companies. In  each case,  he reviewed  the pro  forma
market  share analysis of the  entity and First Interstate  on a combined basis,
and he commented specifically on the nature of any market overlaps between First
Interstate and the company  in question. He also  provided a corporate  overview
for each entity, including return on assets, return on equity, efficiency ratio,
and business mix.
    

    In a telephone conversation initiated by Mr. Hazen later that day, Mr. Hazen
told Mr. Siart that he intended to deliver and make public the following morning
a  letter proposing a merger  of the two companies in  which each share of First
Interstate Common Stock  would be  converted into  .625 shares  of Wells  Common
Stock  (the "Initial Wells Proposal"). In a  subsequent call a short time later,
Messrs. Siart and Hazen discussed under what circumstances Mr. Hazen would agree
not to make his  letter public. Mr.  Hazen stated that Mr.  Siart would have  to
begin   merger  negotiations  the   next  day,  which   Mr.  Siart  rejected  as
inappropriate and  inconsistent  with  both  the  strategic  process  the  First
Interstate Board had already undertaken and the interests of the shareholders of
First Interstate being served by that process. Mr. Siart suggested that inasmuch
as  the Board's process  was already underway,  and that Wells  was included, it
seemed prudent for Wells to wait for the process to conclude.

    On October  18, 1995,  Wells publicly  announced that  it had  delivered  an
unsolicited  letter to Mr. Siart the previous  evening proposing a merger of the
two companies.  Later that  day, three  large regional  bank holding  companies,
including  FBS  (each of  which  had been  considered  as a  potential strategic
partner at  the previous  day's Board  meeting), contacted  First Interstate  to
express  an  interest  in  initiating  discussions to  assess  the  merits  of a
strategic partnership.  Mr. Siart  contacted all  of the  members of  the  First
Interstate  Board to discuss the Initial  Wells Proposal, the need to accelerate
the Board's  process  for reviewing  strategic  alternatives and  the  inquiries
received from these three regional bank holding companies.

   
    First  Interstate's  senior  management,  together  with  First Interstate's
financial advisors, Goldman, Sachs & Co. ("Goldman, Sachs") and Morgan Stanley &
Co. Incorporated ("Morgan Stanley," and together with Goldman, Sachs, the "First
Interstate Financial Advisors"), at the direction of the First Interstate Board,
then  engaged  in   preliminary  discussions   concerning  potential   strategic
partnerships  with  the three  large regional  bank  holding companies  that had
contacted Mr. Siart on October 18.  First Interstate's management and the  First
Interstate   Financial  Advisors  also  continued   to  explore  the  values  to
shareholders which could  be achieved (i)  if First Interstate  chose to  remain
independent rather than pursuing a strategic partnership at the present time and
(ii)  if  a  transaction  with  Wells  were  pursued.  After  discussion  of the
information presented, the First Interstate Board instructed its management  and
advisors to continue to explore strategic partnerships
    

                                       39
<PAGE>
   
with  the  four bank  holding  companies and  the  option of  First Interstate's
remaining independent  at the  present time,  with a  view to  seeking the  best
available alternative for First Interstate's shareholders.
    

   
    The  First Interstate  Board met to  consider the Initial  Wells Proposal on
October 25, 1995. At this meeting,  First Interstate's management and the  First
Interstate  Financial  Advisors  reviewed  with  the  Board  the  status  of the
preliminary discussions with the three large regional bank holding companies  as
well as the Initial Wells Proposal. After discussion, the First Interstate Board
of  Directors concluded based on currently available information that two of the
bank holding companies, Wells and FBS, appeared to offer more promising  options
for  First  Interstate and  its shareholders.  This  determination was  based on
strategic considerations,  business prospects  of  the combined  companies,  and
economic value of the respective proposals to First Interstate shareholders.
    

    On October 26, 1995, Mr. Siart met with Mr. Hazen to discuss the possibility
of  pursuing a merger of First Interstate and Wells. Mr. Siart stated his desire
to learn  more about  the Initial  Wells Proposal.  At this  meeting, Mr.  Hazen
discussed  Wells'  reasons  for publicly  announcing  its  unsolicited proposal.
Messrs. Siart and Hazen also discussed the possible advantages of a  combination
of  First Interstate and Wells, with particular attention being paid to the cost
savings and operating efficiencies which could be achieved in a merger.

   
    Messrs. Siart and Hazen  were joined later that  day by William J.  Bogaard,
First  Interstate's general counsel, George Roberts of Kohlberg Kravis Roberts &
Co. ("KKR"), First Interstate's largest  shareholder, Mr. Rodney L. Jacobs,  the
Vice  Chairman and  Chief Financial  Officer of  Wells, and  Mr. Warren Buffett,
Chairman and Chief  Executive Officer  of Berkshire Hathaway  Inc., the  largest
shareholder   of  Wells.  At  September   30,  1995,  Berkshire  Hathaway  owned
approximately 1 million  shares of First  Interstate Common Stock  (representing
approximately 1.32% of the shares outstanding at such time) and 6,791,218 shares
of   Wells  Common  Stock  (representing  approximately  14.31%  of  the  shares
outstanding at such time). At September 30, 1995, KKR owned 6,177,127 shares  of
First  Interstate Common Stock  (representing approximately 8.16%  of the shares
outstanding  at  such  time).  Extensive  dialogue  ensued  concerning  the  two
companies  and their  respective strategies,  potential cost  savings, operating
efficiencies and reductions in revenue,  and the consolidation of a  substantial
number of First Interstate's and Wells' respective California branch offices and
the revenue loss associated therewith. Mr. Siart asserted that the reductions in
revenue which would result from the transaction would significantly exceed those
estimated by Wells (see paragraph (v) under "Reasons of First Interstate for the
Merger; Recommendation of First Interstate Board" below).
    

    Mr.  Siart  stated that  he  nevertheless believed  that  a merger  of First
Interstate and Wells could enhance shareholder value. Mr. Buffett stated that he
had studied both companies in some detail. He also stated that one could come up
with positives and negatives of  one company compared to  the other, but in  the
end, when evaluating each company, one would conclude that they were about equal
and that accordingly the exchange ratio of .625 made sense to him.

   
    Mr.  Roberts also stated his view, speaking  as a major shareholder of First
Interstate and  not on  behalf of  First Interstate's  management or  the  First
Interstate  Board,  that  given  the  other  attractive  strategic  alternatives
available to First Interstate, the substantial  risk created by a merger of  the
two  companies due to  the increased concentration of  assets in California, and
the tremendous value of the First Interstate franchise, a minimum exchange ratio
of .70 shares of Wells  Common Stock for each  share of First Interstate  Common
Stock was required in order to make the transaction equitable. Mr. Siart did not
state  a position with respect to Mr.  Roberts' suggestion of a minimum exchange
ratio of .70.  During these discussions,  Mr. Hazen stated  that although  Wells
might  consider  increasing the  exchange  ratio offered  to  First Interstate's
shareholders, the maximum exchange ratio it might be prepared to offer was  .65.
However,  he emphasized that he and Mr. Buffett viewed an exchange ratio of .625
as fair to each company's shareholders. Mr. Roberts indicated that the  possible
increase  of the exchange ratio to .65  seemed inadequate to him. Mr. Hazen told
Mr. Siart that in no way should their conversation be construed as meaning Wells
had raised its offer.
    

                                       40
<PAGE>
   
    On  October  30,  1995,  the  First  Interstate  Board  met  to  review  the
discussions  that  had  been  held  with Wells  and  the  three  other potential
strategic partners. Mr.  Siart reported  that FBS  had indicated  that it  would
consider  increasing its exchange ratio from  the previously stated range of 2.3
to 2.4  shares of  FBS Common  Stock for  each First  Interstate share  to  2.5.
Management  and  the First  Interstate Financial  Advisors also  discussed their
views as to  the values  which could be  achieved if  First Interstate  remained
independent,  and the risks associated with  this strategy. At the conclusion of
this meeting, the  First Interstate Board  determined to continue  to explore  a
merger  with each of Wells and  FBS. With respect to Wells,  it was the sense of
the Board that Mr. Siart should determine if Wells would consider increasing the
exchange  ratio  significantly  above  .65.  As  a  result  of  the   foregoing,
discussions with the other prospective strategic partners were deferred, and due
to  the  course of  discussions with  Wells  and FBS,  as described  below, such
discussions were not thereafter pursued.
    

    Messrs. Siart and Hazen  again met on  the morning of  October 31, 1995.  At
this  meeting, Mr. Siart informed Mr. Hazen  that the First Interstate Board had
been fully informed of all of the matters discussed at their October 26  meeting
and  was  considering carefully  all of  the advantages  and disadvantages  of a
potential merger  with  Wells,  as  well as  the  advantages  and  disadvantages
associated  with the other strategic alternatives available to First Interstate.
Extensive discussions concerning potential cost savings, operating  efficiencies
and  revenue losses also took place, with Mr. Siart voicing the various concerns
of the First Interstate Board in this regard. Mr. Hazen stated that he  believed
that  the $100  million in revenue  losses estimated  by Wells were  on the high
side. Mr. Siart stated that First Interstate might consider further  exploratory
discussions  concerning  the  value  to  First  Interstate's  shareholders  of a
potential  merger  with  Wells  if  Wells  would  offer  an  exchange  ratio  of
approximately  .68. Mr.  Hazen then excused  himself from the  meeting. Upon his
return, Mr. Hazen stated that he had consulted with Mr. Buffett, reiterated that
the maximum exchange ratio that Wells  and its major shareholder would  consider
was  .65 shares of Wells Common Stock  for each share of First Interstate Common
Stock, and  stated that  Mr.  Buffett fully  concurred  with this  decision.  In
closing  the meeting, Mr. Siart again stated  that Mr. Hazen should bear in mind
that  First  Interstate   had  available  a   number  of  attractive   strategic
alternatives.

    On  November 1, 1995, Mr. Siart contacted  Mr. Grundhofer and they agreed to
meet the next day. Messrs.  Siart and Hazen also talked  by phone that day.  Mr.
Siart asked Mr. Hazen if he had reconsidered his position. Mr. Hazen stated that
his position remained unchanged and that .65 was the maximum exchange ratio that
Wells would consider.

    On  November 2, 1995, Mr.  Siart met with Mr.  Grundhofer and Mr. Richard A.
Zona, the Chief  Financial Officer of  FBS. At this  meeting, FBS increased  the
exchange  ratio it was  prepared (subject to  the approval of  the FBS Board) to
offer to First Interstate's shareholders to 2.6 from the previous indication  of
2.5  and  First  Interstate and  FBS  continued their  discussions  concerning a
potential merger.  A number  of the  significant business  terms relating  to  a
merger  transaction were discussed. Mr. Siart reported these developments to the
members of the First Interstate Board later  that day. On November 3, 1995,  the
First  Interstate Board met  to consider the  potential merger with  FBS and the
results of Mr. Siart's  conversations with Mr. Hazen.  This meeting included  an
executive session of all of First Interstate's outside directors (other than Mr.
Edward  M.  Carson, the  former Chairman  and Chief  Executive Officer  of First
Interstate), who discussed  the matters under  consideration with their  special
outside  counsel.  During  this  period,  negotiations  between  the  legal  and
financial advisors of  First Interstate and  FBS began concerning  the terms  of
definitive transaction agreements.

    On  November 5, 1995, the First Interstate  Board met to again consider both
the potential merger with FBS and  Wells' merger proposal. At this meeting,  the
management  of  First  Interstate,  as  well  as  First  Interstate's  legal and
financial advisors, made  presentations regarding their  due diligence  findings
concerning  FBS, the strategic alternatives other  than the potential FBS merger
available to  First  Interstate (including  a  merger with  Wells  assuming  for
purposes  of such presentations that Wells  would actually increase its proposed
exchange ratio  to  .65), the  terms  of the  definitive  agreements  negotiated
between  First Interstate  and FBS,  the fairness  opinions of  each of Goldman,
Sachs and Morgan Stanley concerning the exchange ratio for the potential merger,
the fairness opinion of

                                       41
<PAGE>
   
Morgan Stanley concerning the .625 Exchange Ratio included in the Initial  Wells
Proposal  and the .650 Exchange  Ratio which might be  proposed by Wells and the
judgments of both of the First Interstate Financial Advisors expressed orally in
discussions with  the First  Interstate Board  that the  First Interstate  Stock
Option Agreement and the First Interstate Fee Agreement (each as defined herein)
were  within  the  normal  range and  consistent  with  comparable transactions.
Another executive session of all of First Interstate's outside directors  (other
than  Mr. Carson) was also held, with the outside directors consulting with both
their special counsel and  the First Interstate  Financial Advisors. Based  upon
its  consideration of those presentations and other factors more fully described
below, the First Interstate Board unanimously approved and authorized (with  two
directors  absent) the execution and delivery of the Merger Agreement, the Stock
Option Agreements and the Fee Agreements (each as defined herein).
    

   
    Also on November 5,  1995, the FBS  Board met to consider  the terms of  the
Merger.  At this  meeting, the  management of  FBS, as  well as  FBS's legal and
financial advisors, made  presentations regarding their  due diligence  findings
concerning  First Interstate, the terms  of the definitive agreements negotiated
between FBS  and  First Interstate  and  the  fairness opinion  of  J.P.  Morgan
concerning   the  Exchange  Ratio.   Based  upon  its   consideration  of  these
presentations and  other  factors more  fully  described below,  the  FBS  Board
unanimously approved and authorized (with one director absent) the execution and
delivery  of  the Merger  Agreement,  the Stock  Option  Agreements and  the Fee
Agreements.
    

    The Merger was publicly announced on November 6, 1995.

    On November  13,  1995, Wells  issued  a  press release  (the  "Wells  Press
Release") which stated that Wells intended to file a registration statement with
the  Commission with respect to an exchange  offer pursuant to which Wells would
offer to exchange two-thirds of a share of Wells Common Stock for each share  of
First  Interstate  Common Stock  (such proposed  exchange  offer is  referred to
herein as the  "Wells Offer"). The  Wells Press Release  also stated that  Wells
anticipated  (i)  filing  proxy materials  with  the Commission  (a)  to solicit
written consents from shareholders of First Interstate to remove the members  of
the  First Interstate Board and  to replace them with  nominees of Wells who are
committed to removing any impediments to the consummation of the acquisition  of
First  Interstate by Wells and  (b) to solicit proxies  from the shareholders of
First Interstate against the approval of the Merger Agreement and (ii) filing an
application with  the  Federal Reserve  Board  seeking its  approval  of  Wells'
acquisition  of  First Interstate  and Wells'  election  of its  board nominees.
Finally, the  Wells Press  Release stated  that Wells  had commenced  litigation
against  First Interstate, the members of the  First Interstate Board and FBS in
the Chancery Court of the State of Delaware which is described under "-- Certain
Litigation" below.

   
    On November 19, 1995,  the First Interstate Board  met to consider both  the
Wells  Offer and the Merger. At this  meeting, following an executive session of
all of First Interstate's outside directors  (other than Mr. Carson) with  their
special   counsel,  the  management  of  First  Interstate,  as  well  as  First
Interstate's legal and  financial advisors  and the  outside directors'  special
counsel,  reviewed, among other things, the analyses which had been presented to
the First Interstate Board at its November 5, 1995 meeting, with these  analyses
updated  where appropriate to  reflect the increase  in Wells' indicated maximum
exchange ratio from .65 to two-thirds of a share of Wells Common Stock for  each
First  Interstate share. At its November  19 meeting, the First Interstate Board
determined by a unanimous vote (with two directors absent) that the Wells  Offer
was  not  in  the  best  interests of  First  Interstate  and  its shareholders.
Accordingly, the  First  Interstate Board  determined  to recommend  that  First
Interstate  shareholders reject the  Wells Offer and not  tender their shares of
First Interstate Common Stock pursuant to the Wells Offer.
    

    The First Interstate Board also reaffirmed its determination that the  terms
of  the Merger are fair  to, and in the best  interests of, First Interstate and
its shareholders. The factors considered by the First Interstate Board in making
its determinations with respect to the Merger and the Wells Offer are  described
below.

                                       42
<PAGE>
REASONS OF FBS FOR THE MERGER; RECOMMENDATION OF FBS BOARD

   
    In  arriving at its  determination that the Merger  and the Merger Agreement
are fair to, and  in the best  interests of, FBS and  its shareholders, the  FBS
Board  consulted  with J.P.  Morgan with  respect to  the financial  aspects and
fairness of the transaction.  The FBS Board believes  that New First  Interstate
will  be  uniquely  positioned to  take  advantage of  growth  opportunities and
potentially to build a nationwide banking franchise with the size,  geographical
diversity  and  capability  to  meet  the  constantly  changing  demands  of the
financial services business  and to withstand  economic downturns in  individual
geographic  markets.  The  FBS  Board  also  considered  a  variety  of factors,
including the fact  that the  Merger will result  in the  ninth largest  banking
institution  in the United States in terms of total assets and the fifth largest
in terms  of  market value  (based  on total  assets  and market  prices  as  of
September 30, 1995), as well as the following:
    

   
        1.  GREATER OVERALL RESOURCES.  The FBS Board considered that the Merger
    will  result in  the fifth largest  financial institution in  the nation (in
    terms of  market capitalization)  and  one of  the three  largest  financial
    institutions (in terms of deposits) in each of ten states. The FBS Board was
    advised that, on a pro forma basis as of September 30, 1995 giving effect to
    the Merger and the FirsTier Acquisition, the combined company would have had
    approximately  $88.8  billion  in  assets,  approximately  $73.6  billion in
    deposits, approximately $7.1  billion in shareholders'  equity and a  market
    capitalization  exceeding $16.6 billion. The FBS Board determined that, as a
    result, the  Merger would  significantly enhance  FBS's ability  to  compete
    effectively  in  a  rapidly  changing  financial  marketplace.  The FirsTier
    Acquisition is subject to the condition  that there shall not be a  material
    adverse  change in the business  and affairs of FBS  and FirsTier, and other
    conditions customary in  such transactions, including  approval by  FirsTier
    shareholders.  A  failure of  any  such condition  to  be satisfied,  if not
    waived, would prevent consummation of the FirsTier Acquisition. Although FBS
    has no reason to believe that  such conditions will not be satisfied,  there
    can  be no assurance that the  FirsTier Acquisition will be consummated. See
    "Selected Historical and Unaudited Pro Forma Financial Data."
    

        2.  COMPLEMENTARY MARKETS;  DIVERSIFICATION OF ECONOMIC  RISK.  The  FBS
    Board  considered the highly  complementary nature of  the Midwestern United
    States markets of  FBS and the  West Coast/Rocky Mountain  markets of  First
    Interstate,  noting that the  combined company's franchise  would be broadly
    diversified over 21 contiguous states from Illinois to California, including
    83 metropolitan  areas.  The  FBS Board  recognized  that  the  geographical
    diversification  of the combined entity through  the Merger would reduce the
    risk of a significant adverse impact resulting from an economic downturn  in
    an  individual market area and, more generally, should result in more stable
    and predictable  financial  results  over  time,  increasing  the  potential
    effectiveness of long-term financial and strategic planning.

        3.   ENHANCED FRANCHISE.  The FBS  Board considered that the Merger will
    result in  a  combined  company serving  approximately  7.6  million  retail
    customers  and approximately  462,000 business customers  through over 1,500
    branches and approximately  4,700 automated teller  machines. The FBS  Board
    was  advised  that, as  of June  30, 1994  (the latest  date for  which such
    information  is  available,   updated  to  take   into  account   subsequent
    acquisitions),  the  combined  company  would  be  among  the  three largest
    financial institutions in terms of deposits in  10 of the 21 states, and  35
    of  the  83 metropolitan  areas,  comprising its  franchise  area, including
    Minneapolis/St. Paul, Los Angeles/Long Beach, Denver, Phoenix/Mesa, Houston,
    Portland/Vancouver, San Diego and Las Vegas.

        4.  COMPLEMENTARY STRENGTHS.  The FBS Board considered the complementary
    nature of the strengths of FBS and First Interstate, including the fact that
    FBS has focused its efforts upon  the development of new financial  products
    and  new services through the use  of technology, while First Interstate has
    successfully established a strong  marketing capability and brand  identity,
    as  well  as a  broad retail  and  commercial customer  base to  which FBS's
    financial products and services could be marketed. The FBS Board also  noted
    that First Interstate's loan to deposit ratio

                                       43
<PAGE>
    (74.6%  on  deposits  of  $48.2  billion,  as  of  September  30,  1995) was
    substantially less than that of FBS's (118.2% on deposits of $21.9  billion,
    as  of September 30, 1995), and that by combining First Interstate's deposit
    base with FBS's stronger loan production capabilities, the combined  company
    should  be able to enhance  the growth of its  asset portfolio at lower cost
    than FBS  currently incurs  through  external funding.  The FBS  Board  also
    believed  that each of FBS and First Interstate is well managed and that the
    respective managements of  the two  companies are  experienced in  effecting
    substantial  merger and  acquisition transactions,  providing them  with the
    capability  of  successfully  integrating  their  businesses  with   minimal
    disruption  and  risk  to  New  First  Interstate,  its  employees  and  its
    customers. In this  regard, the  FBS Board was  advised that  FBS and  First
    Interstate  have  compatible data  processing  and other  operating systems,
    which should ease the  integration of their businesses  and reduce the  cost
    thereof.  The FBS Board determined that, although no assurance can be given,
    these factors should result in  greater earnings potential for the  combined
    company  than either  FBS or  First Interstate  would have  on a stand-alone
    basis. See  "New  First  Interstate  Forecasted  Consolidated  Statement  of
    Operations."

        5.  OPPORTUNITIES FOR EFFICIENCIES AND COST SAVINGS.  The FBS Board took
    into  account its expectation  that the combined company  will be capable of
    increasing its capitalization and  profitability through the achievement  of
    economies  of scale and  the elimination of redundancies.  The FBS Board was
    advised that, although no assurances can be given that any particular  level
    of  cost  savings  will  be  achieved,  the  managements  of  FBS  and First
    Interstate estimated that New First Interstate would be able to achieve $500
    million in annual pre-tax expense savings attributable to the integration of
    data processing  and  other  back  office  operations,  the  elimination  of
    redundant  corporate overhead and staff  positions, and the consolidation of
    certain business  lines.  The potential  cost  savings are  expected  to  be
    achieved  in various  amounts at  various times  during the  one-year period
    following the Effective Time.  The FBS Board  recognized, however, that  FBS
    and   First  Interstate   are  expected   to  incur   one-time  net  pre-tax
    merger-related charges, estimated  to be approximately  $225 million in  the
    aggregate,  in  connection with  the  Merger. See  "Selected  Historical and
    Unaudited Pro Forma  Financial Data" and  notes thereto and  "The Merger  --
    Management and Operations of New First Interstate Following the Merger."

   
        6.   OTHER  FINANCIAL CONSIDERATIONS.   The FBS  Board considered, among
    other things, the Exchange  Ratio, the resulting  relative interests of  the
    common  shareholders  of  FBS and  First  Interstate  in the  equity  of the
    combined company, the potential for increased earnings per share for  common
    shareholders  of FBS resulting  from the Merger,  including the estimates of
    FBS's management that  the Merger will  be accretive to  per share  earnings
    attributable  to FBS Common Stock,  excluding merger-related charges, by .8%
    in 1996  and  18.2% in  1997,  and that  common  shareholders of  FBS  would
    continue  to participate in the earnings  and growth of the combined company
    through their ownership of New First Interstate Common Stock.
    

   
        7.  ECONOMIC AND COMPETITIVE  ENVIRONMENT; STRATEGIC ALTERNATIVES.   The
    FBS  Board  took  into  account the  current  and  prospective  economic and
    competitive environment facing FBS and First Interstate and other  financial
    institutions  in the markets  in which they participate.  The FBS Board also
    evaluated the  proposed Merger  in  the context  of  its ongoing  review  of
    strategic alternatives that are, or might in the future be, available to FBS
    in  light of  ongoing consolidation  and other  developments in  the banking
    industry and the  financial institution  industry generally.  While the  FBS
    Board did not consider other alternative transactions in connection with its
    review  and approval  of the  Merger, the FBS  Board had  determined, in the
    context of  prior  board  discussions  concerning  various  possible  merger
    scenarios  (none of which resulted in any proposal being made or received by
    FBS), that a  merger with  First Interstate, if  consummated on  appropriate
    terms,  would be a uniquely attractive  opportunity for FBS from a strategic
    standpoint, in view of the  diversification of economic risk,  complementary
    markets and opportunities for efficiencies and cost savings.
    

   
        8.   ADVICE OF  FINANCIAL ADVISOR AND  FAIRNESS OPINION.   The FBS Board
    considered the financial  advice of J.P.  Morgan (including the  assumptions
    and methodologies underlying the
    

                                       44
<PAGE>
   
    analyses  performed by J.P. Morgan in  connection therewith) and the opinion
    of J.P. Morgan that, as  of November 5, 1995,  the Exchange Ratio was  fair,
    from  a financial  point of view,  to the  holders of FBS  Common Stock. The
    opinion of  J.P.  Morgan  and  the  analysis  underlying  such  opinion  are
    summarized  below, and a copy of  such opinion, setting forth the procedures
    followed, the matters considered, the scope of the review undertaken and the
    assumptions made by J.P. Morgan in connection with its opinion, is  attached
    as Appendix F hereto. See "-- Opinion of FBS Financial Advisor."
    

        9.    TERMS  OF  MERGER  AGREEMENT,  STOCK  OPTION  AGREEMENTS  AND  FEE
    AGREEMENTS.  The FBS Board took  into consideration the terms of the  Merger
    Agreement,  the  Stock  Option Agreements  and  the Fee  Agreements  and the
    transactions contemplated thereby.

        10.  DUE DILIGENCE REVIEW.  The FBS Board considered the results of  the
    due  diligence investigations  regarding First  Interstate conducted  by the
    management of FBS.

        11.  DIRECTORS AND  MANAGEMENT OF THE COMBINED  COMPANY.  The FBS  Board
    took into account that the board of directors of New First Interstate would,
    for  a minimum of three years, be  equally comprised of directors of FBS and
    First Interstate,  respectively, and  that the  current management  of  each
    company would have a significant influence in the management of the combined
    company  with John F. Grundhofer continuing  as Chairman and Chief Executive
    Officer of New First  Interstate. See "-- Management  and Operations of  New
    First Interstate Following the Merger."

        12.    TAX  AND ACCOUNTING  TREATMENT  OF  THE MERGER.    The  FBS Board
    considered that the Merger  was expected to be  tax free to shareholders  of
    FBS  for  federal income  tax purposes  and  to be  accounted for  under the
    pooling-of-interests method of accounting.

        13.  REGULATORY APPROVALS.  The FBS Board was advised that it was likely
    that the  Requisite Regulatory  Approvals would  be obtained  without  undue
    delay.

   
    The  FBS Board also noted that neither the  size nor any other aspect of the
combined institution would preclude a future acquisition offer by an  interested
potential  acquiror, although it was aware  that the Stock Option Agreements and
Fee  Agreements  might  discourage  an   offer  for  either  company  prior   to
consummation of the Merger. See "-- Stock Option Agreements" and "-- Termination
Fees."
    

   
    The  foregoing discussion of  the information and  factors considered by the
FBS Board is  not intended to  be exhaustive but  includes all material  factors
considered  by the FBS Board. In reaching  its determination that the Merger and
the Merger Agreement  are fair to,  and in the  best interests of,  FBS and  its
shareholders,  the FBS Board did  not assign any relative  or specific weight to
the foregoing factors, and individual directors may have given differing weights
to different factors. Throughout its  deliberations, the FBS Board received  the
advice of J.P. Morgan, and that of Cleary, Gottlieb, Steen & Hamilton and Dorsey
& Whitney P.L.L.P., the firms retained to serve as its counsel.
    

                                       45
<PAGE>
REASONS OF FIRST INTERSTATE FOR THE MERGER; RECOMMENDATION OF FIRST INTERSTATE
BOARD
    THE  FIRST INTERSTATE  BOARD RECOMMENDS  THAT FIRST  INTERSTATE SHAREHOLDERS
VOTE FOR APPROVAL  AND ADOPTION  OF THE  MERGER AGREEMENT  AND THE  TRANSACTIONS
CONTEMPLATED  THEREBY, INCLUDING THE MERGER. THE FIRST INTERSTATE BOARD BELIEVES
THAT  THE  MERGER   SHOULD  PROVIDE  LONG-TERM   VALUE  TO  FIRST   INTERSTATE'S
SHAREHOLDERS  SUPERIOR TO THAT PROVIDED BY  A TRANSACTION WITH WELLS PURSUANT TO
THE TERMS OF THE WELLS OFFER.

    THE FIRST INTERSTATE BOARD HAS ALSO RECOMMENDED THAT SHAREHOLDERS REJECT THE
WELLS OFFER AND, WHEN AND  IF SUCH OFFER IS COMMENCED,  NOT TENDER ANY OF  THEIR
SHARES OF FIRST INTERSTATE COMMON STOCK OR RIGHTS PURSUANT THERETO.

    In  reaching its determination to approve and adopt the Merger Agreement and
in determining to recommend rejection of  the Wells Offer, the First  Interstate
Board considered the following factors, which, together, constitute all material
factors considered by the First Interstate Board:

   
        (i)  the First Interstate  Board's familiarity with  and review of First
    Interstate's business, operations, financial condition and earnings on  both
    an  historical  and  a  prospective basis.  Among  other  things,  the First
    Interstate Board reviewed the Wall  Street consensus earnings estimates  for
    1996  with  First  Interstate  management's earnings  outlook  for  1996 and
    reviewed earnings estimates  of First Interstate's  management for 1997  and
    1998;
    

   
        (ii) the First Interstate Board's review, based in part on presentations
    by  the First Interstate Financial Advisors and First Interstate management,
    of (a) the strategy, business, operations, earnings and financial  condition
    of  FBS on both an historical and a prospective basis and (b) the historical
    market price of FBS Common Stock.  Among other things, the First  Interstate
    Board  reviewed  the  prospective 1996,  1997  and 1998  earnings  per share
    estimates for FBS, as provided by FBS management, which, in the case of 1996
    estimates, were consistent with Wall Street consensus estimates (there being
    no consensus estimates  available for 1997  and 1998). In  this regard,  the
    First  Interstate Board noted the following  three factors. First, given the
    geographic continuity of the regions  currently served by each company,  the
    Merger  would serve to (x) further  diversify the assets (and thereby reduce
    the attendant credit risks), liabilities and operations of First  Interstate
    into  eight  additional  contiguous states,  with  the  combined institution
    obtaining a top three ranking (in  terms of deposit market share,  excluding
    thrifts  and savings  banks) in  ten states  (Arizona, California, Colorado,
    Minnesota, Montana, Nebraska, Nevada, North Dakota, Oregon and Wyoming),  as
    opposed  to a  top three ranking  in only four  states (Arizona, California,
    Nevada and Oregon)  in a First  Interstate/Wells merger, and  (y) reduce  to
    less  than 30% (from in excess of  40%) the total assets of First Interstate
    located in California. Second, First  Interstate and FBS possess  compatible
    and  complementary  corporate philosophies  with  respect to  strategies for
    enhancing profitability, business  line diversification,  asset quality  and
    risk  management.  Both First  Interstate and  FBS focus  on growth  of core
    businesses and cost control to  achieve profitability growth, and New  First
    Interstate  would  offer  significant  market  diversification,  without any
    problematic asset concentrations, and have a higher level of reserves and  a
    lower level of non-performing assets to assets than a Wells/First Interstate
    combination.  Third, FBS has  multiple banking and  nonbanking product lines
    (E.G., credit card, merchant processing, corporate trust, asset  management)
    which   are  complementary  to  First  Interstate's  product  offerings.  By
    contrast, Wells has  disposed of  or restructured certain  of these  product
    lines  (E.G., asset management and corporate trust) and its concentration in
    real  estate  lending  is   inconsistent  with  First  Interstate's   credit
    philosophy;
    

       (iii) the First Interstate Board's review, based in part on presentations
    by  the First Interstate Financial Advisors and First Interstate management,
    of (a) the strategy, business, operations, earnings and financial  condition
    of Wells on both a historical and a prospective basis and (b) the historical
    market  price of  Wells Common Stock.  In this regard,  the First Interstate
    Board noted  that although  Wells  was a  highly regarded  institution,  its
    strategies  were very different from those  of First Interstate and a merger
    with Wells would create a company with significantly

                                       46
<PAGE>
   
    different characteristics  than  both  First Interstate  currently  and  the
    company  to be created in the Merger with FBS. These differences include (I)
    substantially greater concentration  in the California  market (with 70%  of
    the  combined company's total assets and 78%  of its real estate loans being
    located in California), which concentration  is inconsistent with the  First
    Interstate   Board's  longstanding  desire  to  achieve  greater  geographic
    diversification,  (II)  a  materially  increased  exposure  to  real  estate
    lending,  which  exposure  is inconsistent  with  First  Interstate's credit
    philosophy, (III) the financial impact of a purchase accounting  transaction
    (see  paragraph (xiii)  below) and  (IV) a  narrower business  strategy with
    fewer product lines and revenue growth  opportunities which, in the view  of
    the  First  Interstate Board,  would emphasize  stock repurchases  and other
    financial strategies rather  than core  business growth  as a  key means  of
    increasing  earnings per  share. In particular,  it was noted  that the core
    earnings trend for Wells since 1990 is weak as reflected by essentially flat
    average asset growth, revenue  growth that is below  the median growth  rate
    for  all bank holding companies having assets of $20 billion or more and 400
    or more  branches (the  "Peer Group")  and was  negative in  1993 and  1994,
    negative  total  loan  growth,  a  decline in  loans  to  earning  assets, a
    deterioration in its  efficiency ratio from  51.1% in 1990  to 59.6% in  the
    first half of 1995, and deposit growth that is below the median for the Peer
    Group  and negative in three of the last  five years. It was also noted that
    Wells had the highest level of  non-performing assets to total loans in  the
    Peer  Group  during  the  1990s,  and  that  it  had  the  highest  level of
    charge-offs in the Peer Group since 1993;
    

   
       (iv) the anticipated cost savings and operating efficiencies available to
    First Interstate and FBS as a combined institution following the Merger, the
    potential for  revenue  enhancements at  the  combined institution  and  the
    likelihood  of  achieving  these cost  savings,  operating  efficiencies and
    revenue enhancements relative to the likelihood that they could be  achieved
    in  a  merger with  Wells. Among  other things,  the First  Interstate Board
    reviewed the  projected  cost  savings  associated  with  the  Merger  on  a
    functional  basis (which projected cost savings are  set forth on page 27 of
    the Comparison). See "-- Comparison of  the Merger and the Wells Offer."  In
    addition,  the First Interstate Board  considered FBS's extensive experience
    in  integrating  22  acquisitions  during  the  past  four  years,  and  its
    significant acquisition-related expense reduction experience relative to the
    experience  of Wells, which  had not completed  nor integrated a significant
    acquisition since 1986, and had  never integrated an acquisition outside  of
    California. (See also paragraphs (vi) - (viii) below);
    

   
        (v) the anticipated cost savings and operating efficiencies available to
    First   Interstate  and  Wells  as   a  combined  institution  following  an
    affiliation  of  the  two  institutions   and  the  potential  for   revenue
    enhancements  at  the  combined  institution.  In  this  regard,  the  First
    Interstate Board noted its belief that although the cost savings which might
    be achieved in connection with a  First Interstate/Wells merger could be  as
    high  as  the  $800 million  announced  by  Wells, it  was  likely  that the
    decreases in revenue at the combined institution would significantly  exceed
    the  $100  million  level  publicly  projected  by  Wells  due  to  (a)  the
    divestitures which  were  anticipated to  be  required in  order  to  obtain
    regulatory  approval for the transaction, (b) the decreases in the levels of
    service and ability to generate revenue (both through branch  consolidations
    and  substantial cuts in employment in the corporate banking and trust area)
    which would be required to achieve such cost savings and (c) the likelihood,
    based upon  First  Interstate's  experience in  acquiring  other  California
    financial  institutions, that the branch  consolidations required to achieve
    such cost savings would result in significant deposit attrition. Among other
    things, the  First  Interstate  Board considered  a  presentation  by  First
    Interstate's management which included management's estimates that, based on
    Wells' projected expense reductions of $1 billion, the revenue lost would be
    in  the range of $143 million to $341 million, excluding revenue losses from
    divestitures. Further,  such estimates  indicate that  divestitures of  $1.6
    billion  to $3.2  billion would result  in additional revenue  losses in the
    range of $103 million to $202 million;
    

       (vi) the fact that the  cost savings and operating efficiencies  expected
    to result from the Merger primarily involve the consolidation of back office
    and  operating systems,  which cost  savings and  operating efficiencies are
    expected to be achieved without corresponding significant

                                       47
<PAGE>
   
    reductions in  revenues.  In  comparison, the  cost  savings  and  operating
    efficiencies  expected to result from a merger of First Interstate and Wells
    would, as  explained  in paragraph  (v)  above, be  accomplished,  in  large
    measure,   by  reductions  in  line   operations  and  therefore  result  in
    significant revenue reductions;
    

   
       (vii) the fact  that First  Interstate and FBS  share common  information
    systems  which should greatly facilitate, both as to time required and cost,
    the integration of the two companies' operations and the achievement of cost
    savings and  operating efficiencies.  In contrast,  Wells utilizes  numerous
    systems  which  are incompatible  with  First Interstate's.  Based  on First
    Interstate's extensive experience with multistate systems conversions,  this
    systems  incompatibility could greatly impair the combined company's ability
    to implement  on a  timely basis  the technology  conversion required  in  a
    Wells/First   Interstate   combination,   and   would   require  significant
    expenditures before any  cost savings  and operating  efficiencies could  be
    achieved;
    

   
      (viii)  the significant  experience of the  senior managements  of each of
    First Interstate  and  FBS  in  managing the  operations  of  a  multi-bank,
    multi-state  network  and their  proven  record of  achieving  cost savings,
    operating efficiencies  and  revenue  enhancements in  connection  with  the
    integration of acquired companies. In particular, the First Interstate Board
    noted  that FBS had successfully integrated 22 acquisitions in the preceding
    four years; during the same period,  FBS's overall expense to revenue  ratio
    fell  from  68%  to 55%.  Similarly,  during that  period,  First Interstate
    successfully integrated 19 acquisitions while  its expense to revenue  ratio
    fell  from 71% to 59%. In contrast,  although Wells' senior management has a
    good reputation  for efficient,  low-cost management,  their experience  has
    been  limited to the operation of a  single bank in the State of California,
    and they have  not managed the  process of consummating  a significant  bank
    acquisition since 1986;
    

   
       (ix)  a comparison,  based upon  earnings estimates,  respectively (which
    estimates assume a  normalized loan loss  provision of 50  basis points  for
    First  Interstate and  80 basis  points for Wells  Fargo) for  each of First
    Interstate (reported earnings  per share:  $10.99, $12.53  and $14.31;  cash
    earnings  per share: $11.81, $13.40 and  $15.23), FBS (reported earnings per
    share: $4.60, $5.15  and $5.75; cash  earnings per share:  $5.20, $5.75  and
    $6.36)  and Wells (reported  earnings per share:  $16.34, $18.72 and $20.61;
    cash earnings per  share: $17.09, $19.51  and $21.43) for  the fiscal  years
    1996,  1997 and 1998, of  the reported earnings per  share and cash earnings
    per share attributable to  a share of First  Interstate Common Stock (a)  if
    First Interstate remained as a stand-alone entity and (b) on a pro-forma per
    share equivalent basis giving effect to each of the Merger and a merger with
    Wells,  which demonstrates the  higher earnings per  share and cash earnings
    per share which could  be realized by First  Interstate shareholders in  the
    Merger  compared to those which could  be realized either in the stand-alone
    case or a First Interstate-Wells combination;
    

        (x) the  First Interstate  Board's assessment,  with the  assistance  of
    counsel, concerning the relative likelihood that each of FBS and Wells would
    obtain  all  required  regulatory  approvals for  a  transaction  with First
    Interstate. In  this  regard, the  First  Interstate Board  determined  that
    although  it was likely that each of  FBS and Wells would ultimately receive
    all such approvals, because of significant antitrust concerns raised only in
    a transaction with  Wells, (a) it  was possible that  Wells would require  a
    significantly  longer  period  of  time  than  FBS  to  obtain  all required
    regulatory  approvals  and   (b)  there  was   significant  risk  that   the
    divestitures  which the appropriate governmental entities would require as a
    condition to  granting  the required  regulatory  approvals to  Wells  would
    significantly  exceed Wells' estimates of  such divestitures, which would in
    turn contribute  to reductions  in revenue  at the  combined institution  in
    excess of those estimated by Wells;

   
       (xi)  the  financial  presentations  of  the  First  Interstate Financial
    Advisors (including  the  assumptions  and  methodologies  underlying  their
    analyses  and presentations of pro  forma financial information with respect
    to both the Merger and a merger  of First Interstate and Wells) and (a)  the
    oral  opinion of Goldman, Sachs rendered  on November 5, 1995 (which opinion
    was
    

                                       48
<PAGE>
   
    confirmed in  writing  the following  day)  that, as  of  the date  of  such
    opinion,  the Exchange Ratio is fair to the shareholders of First Interstate
    (which opinion was not  amended or withdrawn on  November 19, 1995) and  (b)
    the  November 5, 1995 opinion of Morgan Stanley that, as of the date of such
    opinion, each of the Exchange Ratio, the exchange ratio of .625 proposed  by
    Wells  and the exchange  ratio of .65  which might be  proposed by Wells was
    fair from a financial point of view to the shareholders of First  Interstate
    (which opinion with respect to the Exchange Ratio was reaffirmed on November
    19, 1995). See " -- Opinions of First Interstate Financial Advisors." Copies
    of such opinions, setting forth the assumptions made, matters considered and
    review  undertaken, are attached as  Appendices G and H  to this Joint Proxy
    Statement/Prospectus. The full  text of  each such  opinion is  incorporated
    herein  by reference and the foregoing descriptions thereof are qualified in
    their entirety by such reference. First Interstate shareholders are urged to
    read these opinions carefully in their entirety;
    

   
       (xii) the First Interstate Board's concerns, based upon presentations  by
    the  First Interstate  Financial Advisors  and First  Interstate management,
    that because  the Wells  Common Stock  was  trading at  ratios of  price  to
    estimated  1996 earnings  (13.0x), price to  book value (3.0x)  and price to
    tangible book  value (3.9x)  which  are among  the  highest in  the  banking
    industry, a risk exists that the value of the Wells Common Stock which would
    be  received by  First Interstate's  shareholders in  the Wells  Offer could
    decline if these  ratios are not  sustained. By comparison,  the FBS  Common
    Stock was trading at a price to estimated 1996 earnings of 11.5x, a price to
    book  value multiple of 2.6x and a  price to tangible book value multiple of
    3.9x;
    

   
      (xiii) the First Interstate Board's concerns that because the  transaction
    contemplated  by the Wells Offer would be accounted for as a purchase rather
    than as a  pooling of  interests, (a)  the combined  institution would  have
    limited   flexibility  to   participate  in   the  continuing  unprecedented
    consolidation of  the banking  industry  (whether such  participation  would
    consist  of seeking to acquire  additional financial institutions or seeking
    to sell itself  and receive  a control premium)  due to  (x) its  inability,
    absent  massive stock reissuances, to engage  in a transaction accounted for
    as a pooling-of-interests until the  two years following the termination  of
    Wells'  stock repurchases and (y) the  fact that no other significant United
    States bank holding  company currently carries  on its books  the amount  of
    goodwill  which would be carried by  the combined institution (most of which
    would result from the combination of  First Interstate and Wells) and (b)  a
    risk  existed that  the value  of the Wells  Common Stock  received by First
    Interstate's shareholders in the Wells Offer would decline if the market was
    to reject the view of Wells that, contrary to common practice in the banking
    industry, the  combined  company  should  be  valued  with  an  emphasis  on
    cash-flows  rather  than reported  earnings. In  contrast, neither  of these
    concerns were raised by the Merger, which will be accounted for as a pooling
    of interests;
    

   
      (xiv) the report of First Interstate's management regarding the  favorable
    response of First Interstate's non-shareholder constituencies (including its
    customers, communities served and employees) to the Merger relative to their
    response  to a transaction with Wells,  which reflected, among other things,
    concerns about  adverse effects  on employment  and on  the commercial  real
    estate  market in California (especially Southern California), the potential
    of such favorable response to aid the prompt consummation of the Merger  and
    the  positive effect such response could  have on the business and financial
    condition and results of  operations of the  combined company following  the
    Merger.  The reaction of these non-shareholder constituencies was made known
    to management  of  First  Interstate in  several  ways,  including  letters,
    telephone calls and extensive news reports appearing in newspapers and other
    media;
    

   
       (xv)  the current  and prospective  economic, regulatory  and competitive
    environment facing financial institutions,  including First Interstate,  FBS
    and Wells. Noted, in particular, were some
    

                                       49
<PAGE>
   
    of  the factors that the First Interstate Board believed were characteristic
    of  the  unprecedented  consolidation  currently  underway  in  the  banking
    industry. These include the drive for greater efficiency and resulting lower
    cost  operations,  the ability  to take  advantage  of synergies  offered by
    consolidation to  better  meet regulatory  burdens,  and the  potential  for
    increased  revenue growth based on broader product mix, greater distribution
    network and increased resources for  product design and development. In  the
    view  of the  First Interstate  Board, these  factors also  mitigate against
    remaining independent and substantially support the conclusions that greater
    geographic and  product  diversification will  result  in an  entity  better
    equipped  to compete in a rapidly consolidating financial services industry;
    and
    

      (xvi) the  following additional  factors which  contributed to  the  First
    Interstate  Board's conclusion that  the Merger is in  the best interests of
    First Interstate and its shareholders:

   
           (A) The First Interstate Board recognized that the combination of FBS
       and First Interstate would be  likely to possess the financial  resources
       necessary to compete more effectively in the rapidly changing marketplace
       for  banking and financial services and  would be effective in fulfilling
       First Interstate's long-term objectives  of increasing its overall  size,
       continuing  to  increase  geographic  diversification  and  enhancing its
       market presence while maintaining its asset quality and credit standards.
       In contrast,  a  combination  with  Wells  would  not  result  in  either
       geographic  or product diversification and would likely limit the ability
       of the combined entity to grow due to the effects of purchase accounting;
    

           (B) the  expectation that  the Merger  will generally  be a  tax-free
       transaction to First Interstate and its shareholders; and

           (C)  the terms of  the Merger Agreement,  the Stock Option Agreements
       and the Fee Agreements,  which were generally  reciprocal in nature,  and
       certain  other information regarding the  Merger, including the terms and
       structure of the Merger,  the proposed arrangements  with respect to  the
       board  of the  combined institution and  the management  structure of the
       combined institution following the Merger.

    The foregoing discussion of  the information and  factors considered by  the
First  Interstate  Board  is not  intended  to  be exhaustive  but  includes all
material factors  considered by  the  First Interstate  Board. In  reaching  its
determination  to approve and recommend the Merger and to recommend rejection of
the Wells  Offer, the  First Interstate  Board did  not assign  any relative  or
specific  weights to  the foregoing factors,  and individual  directors may have
given differing weights to different factors. Throughout its deliberations,  the
First  Interstate Board  received the advice  of the  First Interstate Financial
Advisors and representatives of Skadden, Arps,  Slate, Meagher & Flom, the  firm
retained  to serve as special counsel to  First Interstate, and Irell & Manella,
the firm retained by the outside directors of First Interstate to serve as their
special counsel.

OPINION OF FBS FINANCIAL ADVISOR

    Pursuant to an engagement letter dated  November 5, 1995, FBS retained  J.P.
Morgan as its financial advisor in connection with the Merger.

    At  the meeting of the  FBS Board on November  5, 1995, J.P. Morgan rendered
its oral opinion to the FBS Board that, as of such date, the Exchange Ratio  was
fair  from a financial point of view to holders of FBS Common Stock. J.P. Morgan
has confirmed  its November  5,  1995 oral  opinion  by delivering  its  written
opinion  to the FBS  Board, dated November 5,  1995, that, as  of such date, the
Exchange Ratio was fair from a financial point of view to holders of FBS  Common
Stock.

    THE FULL TEXT OF THE WRITTEN OPINION OF J.P. MORGAN, DATED NOVEMBER 5, 1995,
WHICH  SETS FORTH  THE ASSUMPTIONS  MADE, MATTERS  CONSIDERED AND  LIMITS ON THE
REVIEW  UNDERTAKEN,   IS  ATTACHED   AS   APPENDIX  F   TO  THIS   JOINT   PROXY
STATEMENT/PROSPECTUS  AND IS INCORPORATED HEREIN  BY REFERENCE. FBS SHAREHOLDERS
ARE URGED TO READ  THE OPINION IN  ITS ENTIRETY. THE SUMMARY  OF THE OPINION  OF
J.P. MORGAN SET FORTH HEREIN IS QUALIFIED IN

                                       50
<PAGE>
ITS  ENTIRETY  BY REFERENCE  TO THE  FULL  TEXT OF  SUCH OPINION.  J.P. MORGAN'S
WRITTEN OPINION IS ADDRESSED TO THE FBS BOARD, IS DIRECTED ONLY TO THE  EXCHANGE
RATIO AND DOES NOT CONSTITUTE A RECOMMENDATION TO ANY HOLDER OF FBS COMMON STOCK
AS TO HOW SUCH SHAREHOLDER SHOULD VOTE AT THE FBS SPECIAL MEETING.

    In  arriving at its  opinion, J.P. Morgan, among  other things: (i) reviewed
the Merger Agreement;  (ii) reviewed  First Interstate's Annual  Report on  Form
10-K  and  related  financial  information for  the  three  fiscal  years ending
December 31, 1992 through  December 31, 1994, First  Interstate's Form 10-Q  for
the  quarters ending  March 31,  1995 and June  30, 1995  and First Interstate's
unaudited financial  results for  the three-month  period ending  September  30,
1995;  (iii) reviewed  FBS's Annual  Report on  Form 10-K  and related financial
information for each of the three fiscal years ending December 31, 1992  through
December  31, 1994, FBS's Form  10-Q for the quarters  ending March 31, 1995 and
June 30,  1995, FBS's  unaudited financial  results for  the three-month  period
ending September 30, 1995 and the unaudited balance sheet and shares outstanding
for  FBS, pro forma for the FirsTier  Acquisition as of September 30, 1995; (iv)
held discussions  with  certain  members  of  the  senior  management  of  First
Interstate  and FBS  regarding the Merger,  certain aspects of  past and current
business  operations,  financial  condition   and  future  prospects  of   their
respective  companies, and the effects of  the Merger on the financial condition
and future prospects of  FBS and First Interstate;  (v) reviewed the  historical
market prices and trading activity for the FBS Common Stock and First Interstate
Common  Stock and compared them with  those of certain publicly traded companies
that it deemed to be relevant; (vi)  compared the financial terms of the  Merger
with  the financial  terms of certain  other mergers and  acquisitions that were
publicly available and that it deemed  to be relevant; (vii) considered the  pro
forma  effect of the  Merger on FBS's capitalization  ratios, earnings, and book
value per share; and (viii)  reviewed such other information, financial  studies
and  analyses and performed such other investigations and took into account such
other matters as it deemed necessary.

    J.P. Morgan relied upon and  assumed, without independent verification,  the
accuracy  and completeness of all information that was publicly available or was
furnished to it by FBS or First Interstate or otherwise reviewed by it, and J.P.
Morgan has not  assumed any  responsibility or liability  therefor. J.P.  Morgan
also  relied  upon  the  management  of  FBS  and  First  Interstate  as  to the
reasonableness and achievability of the financial and other operating  forecasts
(and  the assumptions and bases  therefor) provided to it.  In that regard, J.P.
Morgan assumed  with  FBS's  consent that  such  forecasts,  including,  without
limitation,  projected cost savings  and operating synergies  resulting from the
Merger and projections regarding  underperforming and nonperforming assets,  net
charge-offs  and the adequacy of reserves,  reflect the best currently available
estimates and judgments of  such respective matters.  In rendering its  opinion,
J.P.  Morgan did not act  as an expert in the  evaluation of allowances for loan
losses or related matters and it has  not made an independent evaluation of  the
adequacy  of the allowance for loan losses of FBS or First Interstate nor has it
reviewed any credit  files of  FBS or First  Interstate in  connection with  its
opinion.  In addition, J.P. Morgan has  not conducted any valuation or appraisal
of any assets or liabilities of FBS or First Interstate nor have any  valuations
or  appraisals been  provided to J.P.  Morgan. J.P. Morgan  also assumed without
independent verification  that  the  obligations of  FBS  and  First  Interstate
pursuant  to  derivatives,  swaps, foreign  exchange  financial  instruments and
off-balance-sheet lending related financial instruments will not have an adverse
effect that would be relevant to its analysis. J.P. Morgan has also assumed that
the Merger will have the tax consequences contemplated by the Merger  Agreement,
and  that  the  other  actions  contemplated by  the  Merger  Agreement  will be
consummated as described in the Merger Agreement.

    J.P. Morgan's opinion was based on economic, market and other conditions  as
in  effect on, and the information made available to J.P. Morgan as of, the date
of its opinion. Subsequent  developments may affect  J.P. Morgan's opinion,  and
J.P.  Morgan does  not have  any obligation  to update,  revise or  reaffirm its
opinion beyond the date of this Joint Proxy Statement/Prospectus.

    J.P. Morgan's opinion has been rendered without regard to the necessity for,
or level of, any restrictions  that may be imposed  or divestitures that may  be
required in the course of obtaining regulatory approvals for the Merger.

                                       51
<PAGE>
   
    Set  forth below  is a  summary of all  material analyses  performed by J.P.
Morgan in reaching its opinion dated November 5, 1995.
    

   
    INTRODUCTION.   Based  on  the  aggregate  consideration  offered,  using  a
November  3, 1995  price for  the FBS Common  Stock, J.P.  Morgan calculated the
price to market, price to book, price  to tangible book, price to earnings,  and
price  to  asset ratios  for  First Interstate.  This  analysis yielded  a price
premium to market multiple of 3.5%, a price to book multiple of 2.8x, a price to
tangible book multiple  of 3.5x, a  price to  earnings multiple of  12.0x and  a
price  to asset multiple of 18.6x (based  on First Interstate's net earnings for
the twelve months ended September 30, 1995).
    

   
    PRO FORMA MERGER ANALYSIS.  J.P.  Morgan analyzed certain pro forma  effects
resulting  from the Merger.  This analysis indicated  that the transaction would
result in earnings accretion  per FBS Common Stock  equivalent share of .8%  and
18.2% in 1996 and 1997, respectively (based upon projections provided by FBS and
giving  effect  to merger  synergy assumptions  provided  by FBS  resulting from
projected annual cost savings of $500 million, which were projected by FBS to be
fully realized  in 1997).  In  this analysis,  J.P.  Morgan assumed  that  First
Interstate  performed in accordance with the  earnings forecast provided to J.P.
Morgan by FBS's management.
    

    DISCOUNTED DIVIDEND STREAM  ANALYSIS.   Using a  discounted dividend  stream
analysis,  J.P.  Morgan estimated  the present  value of  the future  streams of
after-tax cash  flows that  First  Interstate could  produce, on  a  stand-alone
basis,  through 2001 and distribute to shareholders ("dividendable net income").
In this analysis, J.P. Morgan assumed, for its base case, that First  Interstate
performed  in accordance with the earnings  forecasts provided to J.P. Morgan by
FBS's management and  that First  Interstate could  pay out  up to  100% of  its
available  net income subject to the  maintenance of First Interstate's tangible
common equity to tangible asset  ratio at a minimum  level of 6%. In  estimating
the  terminal values for First Interstate Common Stock, J.P. Morgan considered a
range of valuation methodologies, including perpetual earnings growth, price  to
book  and net  earnings multiples. Based  upon First  Interstate's financial and
other characteristics, J.P. Morgan estimated  the terminal values for the  First
Interstate  Common Stock  using 10.5x  and 11.0x  net earnings  multiples in the
terminal years. The  dividendable net  income streams and  terminal values  were
then  discounted to present values using  different discount rates (ranging from
10.2%  to  11.2%)   chosen  to   reflect  First   Interstate's  estimated   risk
characteristics.  This base case discounted dividend stream analysis indicated a
reference range of between $132.92 and $142.78 per fully diluted share of  First
Interstate   Common  Stock.  This  analysis  was  based  upon  FBS's  management
projections, which were based upon many  factors and assumptions, many of  which
are  beyond the control  of FBS and  First Interstate. As  indicated below, this
analysis is not necessarily indicative of actual values or actual future results
and does not purport to reflect the prices at which any securities may trade  at
the present or at any time in the future.

    CONTRIBUTION  ANALYSIS.   J.P. Morgan  analyzed and  compared the respective
contributions of each of FBS and First Interstate to New First Interstate  based
upon  a comparison  of certain stock  market and financial  information for each
company as a separate entity on a stand-alone basis. This analysis did not  take
into account any synergies. This analysis indicated that FBS would contribute to
New  First Interstate (i) as of September 30, 1995, 37% based upon total assets,
42% based upon total loans, 31% based upon total deposits, 41% based upon  total
shareholders' equity and (ii) 42% based upon fully diluted market capitalization
as  of November 3, 1995. The relative  contributions of FBS and First Interstate
based upon  projected earnings  were  also analyzed.  The Exchange  Ratio  would
result  in holders  of FBS  Common Stock owning  approximately 42%  of New First
Interstate immediately after the Effective Time.

    ANALYSIS OF  SELECTED BANK  MERGER  TRANSACTIONS.   In connection  with  its
opinion,  J.P.  Morgan reviewed  and analyzed  certain financial,  operating and
stock market information relating to all  merger transactions in excess of  $1.0
billion  announced during 1995 involving large commercial banking organizations.
J.P. Morgan focused on six such transactions because it believed that the  banks
or  the transactions were most closely comparable to FBS and First Interstate or
the Merger, as the

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case may be.  These six transactions  were the mergers  of CoreStates  Financial
Corp  and  Meridian Bancorp,  Inc. (first  announced on  October 10,  1995), UJB
Financial Corp and The Summit  Bancorporation (first announced on September  11,
1995),  National  City  Corporation  and  Integra  Financial  Corporation (first
announced on August 28,  1995), PNC Bank  Corporation and Midlantic  Corporation
(first  announced on July 10, 1995),  First Union Corporation and First Fidelity
Bancorporation (first announced on June 19, 1995), and U.S. Bancorp and West One
Bancorp (first  announced on  May 8,  1995). This  analysis indicated  that  the
exchange  ratio received by the shareholders of the acquired company represented
(i) a percentage above market value ranging from approximately 22% to 44%  based
upon  closing stock  prices five  days prior to  the public  announcement of the
transaction and with a median and mean premium of 32%, (ii) a multiple of latest
twelve month earnings per  share ranging from approximately  10.9x to 34.7x  and
with  median and mean multiples of 13.5x  and 17.2x, respectively (with only two
transactions with a multiple in  excess of 13.9x) and  (iii) a multiple of  1995
estimated  earnings per share ranging from approximately 11.7x to 15.7x and with
median and mean multiples of 13.4x and 13.7x, respectively. Based upon currently
outstanding shares and the November 3,  1995 market prices for FBS Common  Stock
and  First  Interstate  Common  Stock,  the  Exchange  Ratio  represented  (i) a
percentage  above  the  market  value  of  First  Interstate  Common  Stock   of
approximately  3.5%, (ii)  a multiple to  the latest twelve  months earnings per
share of First Interstate of approximately  12.0x and (iii) a multiple to  First
Interstate's  estimated 1995 earnings, normalized for estimated excess loan loss
provision, of approximately  13.3x. Earnings  per share estimates  used in  this
analysis   were  the  median  Institutional  Brokers  Estimate  System  ("IBES")
estimates as of  October 26,  1995. IBES  is a  data service  that monitors  and
publishes  a  compilation of  earnings estimates  produced by  selected research
analysts regarding companies of interest to institutional investors.
    

    No company or  transaction used  in the above  analyses as  a comparison  is
identical  to FBS, First  Interstate or the Merger.  Accordingly, an analysis of
the results of  the foregoing  necessarily involves  complex considerations  and
judgments  concerning differences in financial  and operating characteristics of
the companies involved and  other factors that could  affect the public  trading
value  of  the  companies that  were  compared. Mathematical  analysis  (such as
determining the average  or median) is  not, in itself,  a meaningful method  of
using comparable company or transaction data.

    COMPARISON  OF SELECTED COMPANIES.   J.P. Morgan compared selected operating
and stock market data for First Interstate  to the corresponding data of a  peer
group  of twelve super  regional bank holding companies.  J.P. Morgan focused on
the corresponding data of six such super regional bank holding companies that it
believed were  most  closely comparable  to  First Interstate.  These  six  bank
holding  companies were  Wells, KeyCorp,  Wachovia Corporation,  SunTrust Banks,
Inc.,  PNC  Bank  Corp.  and  Norwest  Corporation  (collectively,  the   "First
Interstate  Composite"). This analysis showed, among  other things, that (i) the
ratio of First  Interstate's market price  to its estimated  earnings per  share
estimate  for 1995,  normalized for  estimated excess  loan loss  provision, was
12.8x, as compared  to a  mean of  11.7x and  a median  of 11.3x  for the  First
Interstate Composite (with a range from 10.0x to 13.3x); (ii) the ratio of First
Interstate's market price to its estimated earnings per share estimate for 1996,
normalized  for excess loan loss provision, was  11.6x, as compared to a mean of
10.5x and a median  of 10.0x for  the First Interstate  Composite (with a  range
from  9.1x to  12.2x); and  (iii) as  of November  3, 1995,  the ratio  of First
Interstate's market price to its  book value per share  was 2.7x, compared to  a
mean  of 2.0x and  a median of 2.0x  for the First  Interstate Composite (with a
range from 1.4x  to 3.0x). Earnings  per share estimates  used in this  analysis
were the median IBES estimates as of October 28, 1995.

    The  summary  of  the  J.P.  Morgan  opinion  set  forth  above  provides  a
description of the principal elements of  the analysis performed by J.P.  Morgan
in  arriving at its opinion. It does not purport to be a complete description of
such analyses.  The  preparation  of  a  fairness  opinion  is  not  necessarily
susceptible  to partial  analysis or  summary description.  J.P. Morgan believes
that its analyses and the summary set forth above must be considered as a  whole
and that selected portions of its analyses, without considering all analyses, or
selecting  all  or part  of its  analyses, without  considering all  factors and
analyses, would create an incomplete view of the procedures underlying the  J.P.
Morgan opinion.

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<PAGE>
In  addition, while J.P. Morgan gave  the various analyses approximately similar
weight it may have used them for different purposes, and may have deemed various
assumptions more or less reliable than other assumptions, so that the ranges  of
valuations  resulting from any particular analysis described above should not be
taken to be J.P. Morgan's view of  the actual value of First Interstate or  FBS.
The fact that any specific analysis has been referred to in the summary above is
not  meant to indicate that  such analysis was given  more weight than any other
analyses.

    In performing  its  analyses, J.P.  Morgan  made numerous  assumptions  with
respect  to industry performance,  general business and  economic conditions and
other matters, many of which are beyond the control of First Interstate or  FBS.
The  analyses performed by J.P. Morgan  are not necessarily indicative of actual
values or  actual  future results,  which  may  be significantly  more  or  less
favorable than suggested by such analyses. Such analyses were prepared solely as
part  of J.P.  Morgan's analysis of  the fairness  of the Exchange  Ratio to the
holders of FBS Common Stock, the conclusions  of which were provided to the  FBS
Board.  The analyses do not purport to be appraisals or to reflect the prices at
which a company might actually be sold or the prices at which any securities may
trade at  the present  time  or at  any  time in  the  future. In  addition,  as
described  above, J.P.  Morgan's opinion to  the FBS  Board is just  one of many
factors taken into consideration by the FBS Board.

    As part of its investment banking  business, J.P. Morgan and its  affiliates
are  regularly  engaged  in  valuation of  businesses  and  their  securities in
connection with mergers  and acquisitions, investments  for passive and  control
purposes,  negotiated  underwritings,  secondary  distributions  of  listed  and
unlisted securities, private placements, and valuation for estate, corporate and
other purposes. The  FBS Board selected  J.P. Morgan to  act as FBS's  financial
advisor with respect to the Merger based on J.P. Morgan's substantial experience
in mergers and acquisitions and its familiarity with FBS.

   
    For  services  rendered in  connection with  the Merger,  FBS has  paid J.P.
Morgan $500,000  and  has agreed  to  pay J.P.  Morgan  an additional  fee  upon
consummation  of the Merger. This additional fee will be calculated as a minimum
of $10.0 million,  providing the aggregate  value (as defined)  does not  exceed
approximately $10,411,186,000; should the aggregate value exceed this amount, an
additional fee over the $10.0 million shall be payable to J.P. Morgan calculated
as   .655%  of  the   positive  difference  between   the  aggregate  value  and
approximately $10,411,186,000; provided that in no event may J.P. Morgan's total
compensation,  including  the   fee  previously  paid   and  reimbursement   for
out-of-pocket  expenses, exceed $15.0 million. FBS  has agreed to reimburse J.P.
Morgan for its reasonable out-of-pocket expenses incurred in connection with the
services provided by it, subject to the overall cap described above, and FBS has
agreed to  indemnify J.P.  Morgan  against certain  liabilities relating  to  or
arising  out of its engagement, including liabilities under the securities laws.
Based on the aggregate  value as of December  21, 1995 of $10,100,187,000,  J.P.
Morgan's  fee would total $10,500,000 plus all reasonable out-of-pocket expenses
incurred (as defined in the previous sentence).
    

   
    J.P.  Morgan  and  its  affiliates  maintain  banking  and  other   business
relationships  with  FBS,  including  financial  advisory  services,  asset  and
liability risk management and  custody services, for which  J.P. Morgan and  its
affiliates earn customary fees. In 1994, J.P. Morgan provided a fairness opinion
in connection with FBS's acquisition of Metropolitan Financial Corporation for a
fee  totaling $250,000 in connection with  rendering its opinion. Other business
relationships with  FBS  generated  revenues to  J.P.  Morgan  of  approximately
$210,000 in 1994 and $39,000 during 1995.
    

    In  the ordinary course  of their businesses, affiliates  of J.P. Morgan may
actively trade the  debt and equity  securities of FBS  or First Interstate  for
their  own accounts or for the accounts  of customers and, accordingly, they may
at any time hold long or short positions in such securities.

OPINIONS OF FIRST INTERSTATE FINANCIAL ADVISORS

PRESENTATIONS BY FIRST INTERSTATE FINANCIAL ADVISORS

    First  Interstate  retained  the  First  Interstate  Financial  Advisors  in
connection  with its consideration of the  potential alternatives faced by First
Interstate. The First Interstate Financial Advisors were retained based upon the
qualifications, expertise and reputation of  Goldman, Sachs and Morgan  Stanley,
as  well  as  upon  their  prior  investment  banking  relationships  with First
Interstate.

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<PAGE>
   
    The following  summarizes the  material financial  and comparative  analyses
presented  by the  First Interstate Financial  Advisors to  the First Interstate
Board at its meeting on November 5, 1995, which analyses were considered by  the
First  Interstate Financial Advisors  in rendering their  opinions. This summary
does not purport  to be a  complete description of  the analyses underlying  the
opinions of the First Interstate Financial Advisors.
    

        SUMMARY   COMPARISON  OF  POTENTIAL  MERGER  ALTERNATIVES.    The  First
    Interstate Financial  Advisors  presented  a brief  summary  of  the  Merger
    compared to (i) a transaction in which each share of First Interstate Common
    Stock would be exchanged for .625 shares of Wells Common Stock, the exchange
    ratio  offered by  Wells (the  ".625 Exchange  Ratio") in  the Initial Wells
    Proposal and (ii) a potential merger  between First Interstate and Wells  in
    which  each share  of First Interstate  Common Stock would  be exchanged for
    .650 shares of Wells Common Stock, an exchange ratio discussed by Wells  and
    First  Interstate, but not offered by Wells (the ".650 Exchange Ratio"). The
    indicated values of the Exchange Ratio, the .625 Exchange Ratio and the .650
    Exchange  Ratio  were  $132.28,  $132.66  and  $137.96,  respectively.   The
    indicated  values  were determined  by  multiplying the  applicable exchange
    ratio by the closing price of the offeror's common stock on November 3, 1995
    and each therefore necessarily was dependent  upon the closing price of  the
    offeror's  common stock at  a specific time.  The indicated values reflected
    premiums over the closing price of First Interstate Common Stock on  October
    17,  1995, the  last trading day  prior to  the date that  the Initial Wells
    Proposal was made, of 25% for the Exchange Ratio, 25% for the .625  Exchange
    Ratio and 30% for the .650 Exchange Ratio.

   
        Among  the other matters reviewed in  that comparison were the indicated
    values resulting from the  Exchange Ratio, the .625  Exchange Ratio and  the
    .650  Exchange Ratio expressed as a  multiple of First Interstate's tangible
    book value and as a multiple  of First Interstate's 1995 estimated  earnings
    per share. The Exchange Ratio, the .625 Exchange Ratio and the .650 Exchange
    Ratio  reflected multiples of 3.5, 3.5 and 3.6 times the tangible book value
    of First Interstate  at September  30, 1995, respectively.  With respect  to
    First Interstate's 1995 estimated earnings per share, the Exchange Ratio and
    the  .625 Exchange Ratio each represented a  multiple of 13.7 times the Wall
    Street consensus  estimates compared  to a  multiple of  14.3 for  the  .650
    Exchange  Ratio. Wall Street  consensus estimates for  First Interstate were
    derived from the  earnings estimates of  approximately 16 research  analysts
    whose  estimates were monitored  by First Interstate.  Wall Street consensus
    estimates, described  below, for  FBS and  Wells were  based upon  the  most
    recent  available IBES estimates.  IBES is a data  service that monitors and
    publishes compilations of earnings  estimates by selected research  analysts
    regarding  companies of interest to institutional investors. On the relevant
    date, IBES reflected  the earnings  estimates of  approximately 28  research
    analysts  for FBS and  of approximately 24 research  analysts for Wells. The
    analysis also compared the indicated  dividend and prospective ownership  of
    the  combined entities.  The indicated  annual dividend  to First Interstate
    common shareholders was calculated  to be $3.77 per  share for the  Exchange
    Ratio  and $3.20  for both  the .625  Exchange Ratio  and the  .650 Exchange
    Ratio. The  indicated  annual  dividend  for  the  Merger  was  computed  by
    multiplying  FBS's  current  quarterly  dividend  rate  times  four  and the
    multiplying the  resulting  annual  estimate  by  the  Exchange  Ratio.  The
    indicated  annual dividend for Wells assumed  an increase in Wells' dividend
    such that, at the .625 Exchange Ratio  and the .650 Exchange Ratio, the  per
    share  dividend currently received by the holders of First Interstate Common
    Stock would be  maintained. The  First Interstate  common shareholders  were
    projected  to own 58% of the combined companies under the Merger, 50% of the
    combined companies under the  .625 Exchange Ratio, and  51% of the  combined
    companies  under  the .650  Exchange Ratio.  The First  Interstate Financial
    Advisors did not rank  the Exchange Ratio, the  .625 Exchange Ratio and  the
    .650 Exchange Ratio.
    

        SUMMARY  FINANCIAL COMPARISON.  The  First Interstate Financial Advisors
    made a summary financial  comparison of First Interstate,  FBS, Wells and  a
    super-regional  composite  consisting of  BankAmerica Corporation,  Banc One
    Corporation, Boatmen's  Bancshares,  Inc., First  Union  Corporation,  Fleet
    Financial  Corporation,  KeyCorp,  First Chicago  NBD  Corporation, National

                                       55
<PAGE>
   
    City Corporation,  NationsBank Corporation,  Norwest Corporation,  PNC  Bank
    Corp.,  SunTrust Banks,  Inc. and Wachovia  Corporation (the "Super-Regional
    Composite") on the  basis of  various financial ratios,  including price  to
    book  ratio, price to tangible book  ratio, return on average common equity,
    return on average assets,  efficiency ratio, fee  income ratio, reserves  to
    non-performing  loans and  tangible common equity  ratio. The Super-Regional
    Composite was developed through discussions with First Interstate management
    and a review of comparably-sized banking institutions. The First  Interstate
    Financial  Advisors also  compared First  Interstate, FBS  and Wells  on the
    basis of estimated net income growth, earnings per share growth and 1995 and
    1996 estimated price to earnings ratios.  The FBS estimates did not  reflect
    the  FirsTier  Acquisition, which  was believed  not to  be material  to the
    analyses. The historical financial data summarized was at or for the quarter
    ended September 30, 1995. Except for First Interstate, the summary was based
    upon the closing common  stock prices on  November 2, 1995;  in the case  of
    First  Interstate the summary was based upon the closing common stock prices
    on October 17, 1995. Earnings estimates for First Interstate, FBS and  Wells
    were  based upon Wall  Street consensus estimates,  assuming normalized loan
    loss provisions for First Interstate and  Wells of $10.99 and $12.53,  $4.60
    and  $5.15, and $16.34  and $18.72, respectively, for  1996 and 1997. Growth
    rate estimates  for  First Interstate  and  FBS were  based  upon  estimates
    prepared  by Goldman Sachs  Equity Research and by  the managements of First
    Interstate and  FBS. Growth  rate estimates  for Wells  were based  upon  an
    analysis  of  Wall  Street  consensus  estimates  and  Goldman  Sachs Equity
    Research estimates.
    

        Estimated price to earnings ratios based upon the Wall Street  consensus
    estimates  were 11.0, 12.5, 14.6 and  10.8 times 1995 estimated earnings for
    First Interstate, FBS, Wells and the Super-Regional Composite, respectively,
    and 9.6,  11.1,  13.2  and  9.8 times  1996  estimated  earnings  for  First
    Interstate,  FBS, Wells and the Super-Regional Composite, respectively. Wall
    Street consensus estimates for FBS,  Wells and the Super-Regional  Composite
    were based on the most recent available IBES estimates. Based on the closing
    price  of  the First  Interstate  Common Stock  on  October 17,  1995, First
    Interstate's per share price to book  ratio and per share price to  tangible
    book ratio were 2.2 and 2.8, respectively. Based on the closing price of the
    FBS  Common Stock on November  2, 1995, FBS's per  share price to book ratio
    and per  share  price  to  tangible  book ratio  were  2.5  and  3.3  times,
    respectively.  Based  on the  closing  price of  the  Wells Common  Stock on
    November 2, 1995, Wells's per share price to book ratio and per share  price
    to  tangible book ratio  were 3.0 and  3.9, respectively. The Super-Regional
    Composite per share price to book ratio and per share price to tangible book
    ratio, respectively,  were 1.7  and 2.0  times the  closing prices  for  the
    common  stock comprising the  Super-Regional Composite banks  on November 2,
    1995. First Interstate's, FBS's,  Wells' and the Super-Regional  Composite's
    annualized  returns on average  common equity and  returns on average assets
    for the quarter  ended September 30,  1995 were 23.0%  and 1.55%; 21.5%  and
    1.76%; 24.6% and 1.73%; and 17.2% and 1.25%, respectively.

        The First Interstate Financial Advisors presented tangible common equity
    ratios  of 5.32% for  First Interstate, 6.15%  for FBS, 5.20%  for Wells and
    6.29%  for  the  Super-Regional  Composite  and  a  ratio  of  reserves   to
    non-performing  loans of 356%  for First Interstate, 390%  for FBS, 312% for
    Wells and 281% for the Super-Regional Composite.

        Projected earnings per share growth rates for the period 1995-1999  were
    16.8%  for  First  Interstate and  12.6%  for  FBS based  on  the respective
    management's estimates and 11.4% for Wells based on analysis of Wall  Street
    estimates.  Projected  earnings per  share  growth by  Goldman  Sachs Equity
    Research for 1995-1997 were 10.4%, 14.0% and 14.2% for First Interstate, FBS
    and Wells, respectively. The net income growth rate for the period 1995-1999
    was estimated to be 11.7% and 9.5% for First Interstate and FBS based on the
    respective management's estimates and 5.6% for Wells based on an analysis of
    Wall Street estimates. For the quarter ended September 30, 1995, annualized,
    First Interstate had an efficiency ratio of 56%, FBS had an efficiency ratio
    of 49%,  Wells  had  an  efficiency ratio  of  52%  and  the  Super-Regional
    Composite had an

                                       56
<PAGE>
    efficiency  ratio of 60%. The efficiency  ratio is the ratio of non-interest
    expense (excluding  restructuring  charges,  other  real  estate  owned  and
    goodwill amortization) to the sum of (i) net income before the provision for
    loan  and lease  losses and  (ii) non-interest  income (excluding securities
    gains  and  losses).  For  the  quarter  ended  September  30,  1995,  First
    Interstate   had  a  fee  income  ratio  of  31%  and  FBS,  Wells  and  the
    Super-Regional Composite  had  fee  income  ratios  of  34%,  33%  and  34%,
    respectively.  The fee  income ratio  is the  ratio of  fee income  to total
    revenues.

        PRO FORMA FINANCIAL ANALYSIS.   The First Interstate Financial  Advisors
    analyzed the pro forma per share financial impact of the Exchange Ratio, the
    .625  Exchange Ratio  and the  .650 Exchange  Ratio from  the perspective of
    First Interstate as  well as  from the perspectives  of FBS  and Wells.  The
    analysis considered the pro forma effects of the transaction on a variety of
    financial  measures,  including,  among  others,  earnings  per  share, cash
    earnings per share (I.E. earnings  per share before goodwill  amortization),
    net  income growth  and tangible  book value  per share,  capital ratios and
    various profitability  measures. The  analysis  was based  alternatively  on
    either  (a) the internal financial forecast of First Interstate's management
    (the "First Interstate  Management Forecast") or  (b) Wall Street  consensus
    estimates  for First Interstate (the "First Interstate Wall Street Consensus
    Estimates"), and  in  all  cases on  FBS'  management's  internal  financial
    forecast  for  FBS and  the Wall  Street consensus  estimates for  Wells. In
    preparing the analysis, all earnings data were adjusted for normalized  loan
    loss  provisions for First  Interstate and Wells  and excluded restructuring
    charges and reserve  reversals. This  analysis was based  on the  assumption
    that   the  combined   companies  would  realize   the  projected  operating
    performance assumptions within the specified time range as indicated by  FBS
    or Wells.

        FIRST  INTERSTATE PRO FORMA PER SHARE  ANALYSIS.  The analysis performed
    indicated that the  Merger would  be accretive  to earnings  per share  from
    First Interstate's perspective in 1996 and 1997 by 6% and 19%, respectively,
    under   the  First  Interstate  Management  Forecast  and  by  8%  and  23%,
    respectively, under the First Interstate Wall Street Consensus Estimates. By
    the same measures, a  combination with Wells under  the .625 Exchange  Ratio
    would  be  dilutive by  10%  and 9%  under  the First  Interstate Management
    Forecast; and by 8% and 6% under the First Interstate Wall Street  Consensus
    Estimates  and under the .650 Exchange Ratio  would be dilutive by 8% and 8%
    under the First Interstate  Management Forecast and by  6% and 5% under  the
    First  Interstate Wall Street Consensus  Estimates, respectively. The Merger
    would also be accretive to 1996  earnings per share from First  Interstate's
    perspective  on a  full cost  savings basis which  gives effect  to the full
    amount of estimated  cost savings in  that year,  by 22% and  24% under  the
    First  Interstate Management Forecast  and the First  Interstate Wall Street
    Consensus Estimates, respectively.  On the  same basis,  a combination  with
    Wells  under the .625  Exchange Ratio and  the .650 Exchange  Ratio would be
    accretive by 9% and 10%, respectively, under the First Interstate Management
    Forecast and by 11% and 11%,  respectively, under the First Interstate  Wall
    Street  Consensus Estimates.  In addition,  the Merger  was projected  to be
    accretive to 1996 and 1997 cash earnings  per share by 8% and 20% under  the
    First  Interstate Management  Forecast and  by 10%  and 24%  under the First
    Interstate Wall Street  Consensus Estimates;  a combination  with Wells  was
    projected  to be (i) dilutive to 1996 and 1997 cash earnings per share by 4%
    and 1% under the .625 Exchange Ratio, and dilutive to 1996 cash earnings per
    share by 2% and accretive  to 1997 cash earnings per  share by 1% under  the
    .650  Exchange Ratio using the First Interstate Management Forecast and (ii)
    dilutive to 1996 cash earnings  per share by 3%  and accretive to 1997  cash
    earnings per share by 2% under the .625 Exchange Ratio and accretive to 1997
    cash  earnings  per share  by  4% with  an  immaterial impact  on  1996 cash
    earnings per share using the .650 Exchange Ratio under the First  Interstate
    Wall Street Consensus Estimates.

        The  analysis also estimated the percentage  growth in net income during
    the period  1996  through 1999  based  on the  First  Interstate  Management
    Forecast  to be 12.3%  for the Exchange  Ratio, 11.8% for  the .625 Exchange
    Ratio and 11.7%  for the .650  Exchange Ratio. The  net income growth  rates
    assuming  First Interstate Wall Street Consensus Estimates were 10.6%, 10.3%
    and 10.2%  for the  Exchange Ratio,  the .625  Exchange Ratio  and the  .650
    Exchange Ratio, respectively.

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<PAGE>
    From  First  Interstate's perspective,  tangible  book value  per  share was
    estimated to decrease by (i) 1% under the Exchange Ratio, (ii) 13% under the
    .625 Exchange  Ratio  and (iii)  11%  under  the .650  Exchange  Ratio.  The
    projected  impact  of  the Merger  and  a  combination with  Wells  on First
    Interstate's per share return  on average assets,  return on average  common
    equity  and return on  average tangible common equity  for the quarter ended
    September 30, 1995 (assuming normalized  loan loss provision and full  phase
    in  of expense savings and in the  case of return on average tangible common
    equity  before  goodwill  amortization)  were  also  analyzed.  The  returns
    estimated  to result from the Merger were: a 1.98% return on average assets,
    a 27.5%  return on  average common  equity  and a  38.1% return  on  average
    tangible  common  equity.  The returns  estimated  to result  from  the .625
    Exchange Ratio were  a 1.68%  return on average  assets, a  13.4% return  on
    average common equity, and a 33.2% return on average tangible common equity;
    and  the returns  estimated to  result from the  .650 Exchange  Ratio were a
    1.66% return on average assets, a 12.8% return on average common equity  and
    a 32.9% return on average tangible common equity).

        The  First Interstate pro forma per share fee income ratio was estimated
    to be  32% for  the Exchange  Ratio compared  to 33%  for each  of the  .625
    Exchange  Ratio  and the  .650 Exchange  Ratio, based  upon results  for the
    quarter ended September 30, 1995. The  efficiency ratio was estimated to  be
    45%  for the Exchange Ratio and 44% for the .625 Exchange Ratio and the .650
    Exchange Ratio. The theoretical market value of the combined companies based
    upon market capitalization and the  present value of estimated cost  savings
    was  estimated to be $138 per share for the Exchange Ratio and $141 and $144
    per share  for  the  .625  Exchange  Ratio  and  the  .650  Exchange  Ratio,
    respectively.

        FBS  PRO FORMA PER SHARE ANALYSIS.   From FBS' perspective, the analysis
    performed indicates,  among  other things,  that  the Merger  would  be  (i)
    accretive  to  1997 earnings  per share  by 20%  using the  First Interstate
    Management Forecast  and  by 15%  using  the First  Interstate  Wall  Street
    Consensus  Estimate, (ii) accretive  to 1997 cash earnings  per share by 16%
    using the  First Interstate  Management  Forecast and  11% using  the  First
    Interstate  Wall  Street  Consensus  Estimates and  (iii)  dilutive  to FBS'
    tangible book  value  per share  by  5%. Under  the  Merger, FBS'  ratio  of
    tangible  common equity  to tangible assets  would be reduced  to 5.48% from
    6.15%.

        WELLS PRO  FORMA  PER SHARE  ANALYSIS.   From  Wells'  perspective,  the
    analysis  performed indicated, among  other things, that  a combination with
    Wells would be (i) accretive by 6%  and 3% to 1997 earnings per share  under
    the .625 Exchange Ratio and the .650 Exchange Ratio, respectively, under the
    First  Interstate Management Forecast and accretive by 1% and dilutive by 2%
    under the .625  Exchange Ratio  and the .650  Exchange Ratio,  respectively,
    using  the First Interstate Wall  Street Consensus Estimates, (ii) accretive
    by 18% and 16% to 1997 cash earnings per share under the .625 Exchange Ratio
    and the  .650  Exchange  Ratio, respectively,  using  the  First  Interstate
    Management  Forecast and  accretive by 13%  and 11% under  the .625 Exchange
    Ratio and the .650 Exchange Ratio, respectively, under the First  Interstate
    Wall  Street Consensus Estimates, and (iii) dilutive to Wells' tangible book
    value per share by 1% under the .625 Exchange Ratio and by 3% under the .650
    Exchange Ratio. Under  both the .625  Exchange Ratio and  the .650  Exchange
    Ratio,  Wells' ratio of  tangible common equity to  tangible assets would be
    reduced to 4.86% from 5.20%.

        EXCHANGE RATIO  VALUATIONS, STOCK  PRICE  STUDY AND  SUMMARY  INVESTMENT
    RESEARCH  OUTLOOK.  The  First Interstate  Financial  Advisors  compared the
    implied value of  the Exchange Ratio  with the .625  Exchange Ratio and  the
    .650  Exchange Ratio for four periods; the one month and three month periods
    preceding the Initial Wells Proposal (September 18 to October 17 and July 17
    to October  17) and  the one  month and  three month  periods preceding  the
    November 5, 1995 First Interstate Board meeting (October 2 to November 2 and
    August  2 to November 2). Implied value was determined for these purposes by
    multiplying the applicable exchange ratio by the closing prices per share of
    the offeror's common stock on each  trading day in the relevant period.  The
    high  and low implied values for the period September 18 to October 17, 1995
    for the Exchange Ratio were $135.20 and $120.25, for the .625 Exchange Ratio
    were $133.52 and $113.83 and for

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<PAGE>
    the .650 Exchange Ratio were $138.86  and $118.38. The high and low  implied
    values  for the period  July 17 to  October 17, 1995  for the Exchange Ratio
    were $135.20  and $110.50,  for the  .625 Exchange  Ratio were  $133.52  and
    $111.09  and for the .650 Exchange Ratio  were $138.86 and $115.54. The high
    and low implied values for the period October 2 to November 2, 1995 for  the
    Exchange  Ratio were $135.20  and $125.45, for the  .625 Exchange Ratio were
    $143.13 and  $118.75  and for  the  .650  Exchange Ratio  were  $148.85  and
    $123.50. The high and low implied values for the period August 2 to November
    2,  1995  for the  Exchange Ratio  were  $135.20 and  $111.80, for  the .625
    Exchange Ratio were $143.13 and $111.09 and for the .650 Exchange Ratio were
    $148.85 and $115.54.

        OTHER.  In  addition, the First  Interstate Financial Advisors  examined
    and presented data on the historical impact of selected banking transactions
    on  the price of  an acquiror's common stock,  and summarized the historical
    common  stock  performance   of  First  Interstate,   FBS,  Wells  and   the
    Super-Regional  Composite.  The  First  Interstate  Financial  Advisors also
    provided the First  Interstate Board  with a summary  of publicly  available
    research  reports on  First Interstate, FBS  and Wells, the  rating given to
    each by the analyst, the estimated price target for the common stock of each
    institution, which ranged  from $113-$120  per share  for First  Interstate,
    $50-$58  per share for FBS and $210-$229 per share for Wells, depending upon
    the analyst, and 1996  and 1997 earnings per  share estimates, ranging  from
    $11.00-$11.85  per share  for First  Interstate ($10.40-$11.00  adjusted for
    normalized loan loss provisions), $4.40-$4.70 per share for FBS and  $21-$23
    per  share  for  Wells  ($17.55-$18.85  adjusted  for  normalized  loan loss
    provisions), depending upon the analyst.

    At the meeting of the First  Interstate Board of Directors held on  November
19,  1995, the  First Interstate  Financial Advisors  updated their  analysis in
light of the  Wells Offer and  to reflect  common stock prices  on November  17,
1995. The November 19 presentation analyzed the Wells Offer in comparison to the
Exchange  Ratio using substantially the same  methods as described above for the
November 5, 1995 board  meeting, except for  the additional analyses  summarized
below.  The indicated values on November 17,  1995 were $137.80 for the Exchange
Ratio and  $141.17 for  the Wells  Offer. The  summary financial  comparison  of
selected  banks included additional financial information  for each of the banks
comprising the  Super-Regional  Composite.  The  pro  forma  financial  analyses
compared  the pro forma First Interstate, FBS  and Wells per share impact of the
Exchange Ratio and the Wells Offer. The Wells Offer was analyzed using both $700
million and revised $900  million net cost savings  estimates provided by  Wells
(net  of  anticipated  revenue attrition  of  $100  million in  each  case). The
earnings estimates used  in the pro  forma analysis were  Wall Street  consensus
estimates   compiled  by  First  Interstate  management  for  First  Interstate,
management estimates for FBS  and Wall Street consensus  estimates for Wells.  A
five-year  indexed common  stock price  history and  a comparison  of historical
returns and projected five-year earnings per share growth for FBS and Wells  and
the  Super-Regional Composite  were presented  at the  November 19  meeting. The
First  Interstate  Financial  Advisors  also   presented  an  analysis  of   the
sensitivity  of (x) hypothetical prices per share  of FBS and Wells Common Stock
to (y) various 1997  estimated price to  pro forma earnings  ratios for FBS  and
Wells multiplied by 2.60 in the case of FBS and two-thirds in the case of Wells.
The  exchange ratio valuations were  updated to include the  one week, one month
and three months periods prior to the November 19, 1995 board meeting.

   
    The projections furnished  to the  First Interstate  Financial Advisors  for
First  Interstate and  FBS were prepared  by the respective  managements of each
company. The 1996 earnings estimates for such companies were consistent with the
consensus Wall Street estimates. As of November 5, 1995, as a matter of  policy,
neither   First  Interstate  nor  FBS  publicly  disclosed  internal  management
projections of the type provided to  the First Interstate Financial Advisors  in
connection  with their  analyses of  the Merger,  and such  projections were not
prepared with a view toward public  disclosure. These projections were based  on
numerous  variables and assumptions which are inherently uncertain and which may
not be within the control of management, including, without limitation,  factors
related   to  general  economic,  competitive   and  regulatory  conditions  and
prevailing interest rates. Accordingly, actual
    

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<PAGE>
   
results could vary significantly from those  set forth in such projections.  The
material  assumptions upon which such projections  are based are described under
"New First Interstate Forecasted Consolidated  Statement of Operations --  Notes
to Forecasted Consolidated Statement of Operations."
    

   
    The  preparation  of a  fairness opinion  is  a complex  process and  is not
necessarily susceptible to a  partial analysis or  summary description. Each  of
the  First  Interstate Financial  Advisors believes  that  its analyses  must be
considered as  a whole  and that  selecting portions  of its  analyses,  without
considering  the analyses taken as  a whole, would create  an incomplete view of
the process underlying the analyses set forth in its opinions. In addition, each
of the First Interstate  Financial Advisors considered the  results of all  such
analyses and did not assign relative weights to any of the analyses, so that the
ranges  of  valuations resulting  from any  particular analysis  described above
should not be taken to be the  First Interstate Financial Advisors' view of  the
actual value of First Interstate or a combination of either First Interstate and
FBS or First Interstate and Wells.
    

   
    In  performing its analyses, each of the First Interstate Financial Advisors
made  numerous  assumptions  with  respect  to  industry  performance,   general
business,  economic and regulatory  conditions and other  matters, many of which
are beyond the control of First Interstate or FBS. The analyses performed by the
First Interstate Financial  Advisors are  not necessarily  indicative of  actual
values,  trading values or actual future results  that might be achieved, all of
which may  be  significantly more  or  less  favorable than  suggested  by  such
analyses.  Such analyses were prepared solely as a part of each First Interstate
Financial Advisor's analysis of the fairness of the Merger and were provided  to
the  First Interstate Board. The analyses do  not purport to be appraisals or to
reflect the prices at which a company  might be sold. In addition, as  described
above,  the opinions of the First Interstate Financial Advisors were one of many
factors taken into  consideration by the  First Interstate Board  in making  its
determination  to approve the Merger. Consequently, the analyses described above
should not be viewed as determinative  of the First Interstate Board's or  First
Interstate management's opinion with respect to the value of First Interstate or
a  combination of either First Interstate and  FBS or First Interstate and Wells
or of whether the  First Interstate Board or  First Interstate management  would
have  been  willing to  agree to  a different  exchange ratio.  First Interstate
placed no limits on the scope of the analysis performed, or opinions  expressed,
by the First Interstate Financial Advisors.
    

    Each  First Interstate  Financial Advisor  is an  internationally recognized
investment banking and advisory  firm. Each, as part  of its investment  banking
business,  is continuously engaged in the valuation of businesses and securities
in  connection  with   mergers  and   acquisitions,  negotiated   underwritings,
competitive biddings, secondary distributions of listed and unlisted securities,
private  placements  and valuations  for corporate  and  other purposes.  In the
course of its market making and other trading activities, each may, from time to
time, have a  long or short  position in, and  may buy and  sell, securities  of
First  Interstate, FBS, Wells and other  relevant financial institutions. In the
past, each  of the  First Interstate  Financial Advisors  and certain  of  their
affiliates  have  provided financial  advisory and  financial services  to First
Interstate, FBS and Wells and have received customary fees for the rendering  of
these services.

   
    First  Interstate  agreed  to pay  each  of the  First  Interstate Financial
Advisors fees of $10 million, half of  which was paid upon the execution of  the
engagement  letter with each firm  and half of which  was paid upon execution of
the Merger Agreement.  An additional  fee is  payable upon  consummation of  the
Merger  (or any other transaction in which at least 50% of the outstanding First
Interstate Common  Stock  is  acquired)  calculated as  .655%  of  the  positive
difference  between the aggregate  value (as defined  in the engagement letters)
and approximately $10,411,186,000; PROVIDED that  in no event may the  aggregate
of  all compensation to each First  Interstate Financial Advisor exceed .175% of
the aggregate  value. For  purposes  of calculating  the  amount due  the  First
Interstate Financial Advisors, securities are valued on the basis of the average
of  the last sales prices for such  securities on the twenty trading days ending
five days prior to the consummation of the transaction. Assuming that the Merger
was consummated on              ,  1996 the additional fee payable to the  First
Interstate Financial Advisors would be $         . In addition, First Interstate
has agreed to reimburse each of
    

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<PAGE>
the  First  Interstate  Financial  Advisors  for  its  reasonable  out-of-pocket
expenses incurred  in  connection  with  the services  provided  by  it  and  to
indemnify  and hold harmless each of the First Interstate Financial Advisors and
certain related parties,  to the full  extent lawful, from  and against  certain
liabilities  and  expenses,  including  certain  liabilities  under  the federal
securities laws, incurred in connection with its engagement.

OPINION OF GOLDMAN, SACHS & CO.

    At the November  5, 1995  meeting of  the First  Interstate Board,  Goldman,
Sachs  rendered an oral opinion that, as of such date and based upon and subject
to various qualifications and assumptions described with respect to its opinion,
the Exchange Ratio  was fair to  the holders of  First Interstate Common  Stock.
Goldman,  Sachs delivered to the First  Interstate Board a written opinion dated
as of November  6 confirming its  November 5,  1995 oral opinion.  At the  First
Interstate  Board meeting held on November  19, 1995, Goldman, Sachs advised the
First Interstate Board in  writing that nothing had  come to its attention  that
would  cause it to withdraw or amend either  its oral opinion given to the First
Interstate Board on November 5, 1995, or the written confirmation thereof  dated
November 6, 1995.

    THE FULL TEXT OF THE OPINION OF GOLDMAN, SACHS, WHICH SETS FORTH ASSUMPTIONS
MADE,  MATTERS  CONSIDERED AND  LIMITS  ON THE  SCOPE  OF REVIEW  UNDERTAKEN, IS
ATTACHED AS  APPENDIX  G  TO  THIS  JOINT  PROXY  STATEMENT/  PROSPECTUS.  FIRST
INTERSTATE  SHAREHOLDERS  ARE URGED  TO READ  THIS OPINION  IN ITS  ENTIRETY. NO
LIMITATIONS WERE IMPOSED BY THE FIRST INTERSTATE BOARD UPON GOLDMAN, SACHS  WITH
RESPECT TO THE INVESTIGATIONS MADE OR PROCEDURES FOLLOWED BY IT IN RENDERING ITS
OPINIONS.  GOLDMAN, SACHS'  OPINION WHICH IS  ADDRESSED TO  THE FIRST INTERSTATE
BOARD, IS  DIRECTED  ONLY  TO THE  EXCHANGE  RATIO  AND DOES  NOT  CONSTITUTE  A
RECOMMENDATION  TO ANY FIRST  INTERSTATE SHAREHOLDER AS  TO HOW SUCH SHAREHOLDER
SHOULD VOTE AT THE FIRST INTERSTATE SPECIAL MEETING. THE SUMMARY OF THE  OPINION
OF  GOLDMAN,  SACHS  SET  FORTH  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE FULL TEXT OF SUCH OPINION.

    In connection  with  rendering  its  oral opinion  presented  to  the  First
Interstate  Board of Directors on November 5, 1995 and its written opinion dated
November 6,  1995, Goldman,  Sachs,  among other  things: (i)  analyzed  certain
publicly   available  financial  statements  and   other  information  of  First
Interstate and  FBS,  respectively,  (ii) analyzed  certain  internal  financial
analyses  and forecasts prepared by the managements of First Interstate and FBS,
respectively, including analyses of certain cost savings, operating efficiences,
revenue effects and financial synergies expected by First Interstate and FBS  to
be achieved as a result of the Merger; (iii) reviewed and considered information
prepared  by  senior management  of  First Interstate  and  FBS relating  to the
relative contributions of First Interstate and  FBS to the combined company  and
the estimated pro forma impact of the Merger on earnings per share, consolidated
capitalization  and certain other  financial ratios for  the combined company as
compared to  First Interstate  and  FBS; (iv)  discussed  the past  and  current
business  operations, regulatory  relationships, financial  condition and future
prospects of First Interstate and FBS with senior executives of First Interstate
and FBS  and  each senior  management's  assessment  of the  strategic  fit  and
implications  of  the  Merger;  (v)  reviewed  certain  public  research reports
concerning  First  Interstate,  FBS  and  Wells,  including  earnings  estimates
contained  therein, with the  management of First  Interstate; (vi) reviewed the
results of First Interstate's due diligence review of FBS with senior management
of  First  Interstate;  (vii)  compared  the  financial  performance  of   First
Interstate  and  FBS and  the prices  and trading  activity of  First Interstate
Common Stock and FBS Common Stock with that of certain other comparable publicly
traded super-regional  bank and  bank holding  companies and  their  securities;
(viii)  reviewed the financial terms of  certain recent business combinations in
the commercial banking industry specifically and in other industries  generally;
(ix)  reviewed the draft Merger Agreement and certain related documents; and (x)
performed such other analyses as it deemed appropriate.

    Goldman, Sachs assumed  and relied upon,  without independent  verification,
the accuracy and completeness of the information reviewed by it for the purposes
of  its opinion.  With respect  to the  financial forecasts,  including, without
limitation, the  analyses  and  forecasts of  certain  cost  savings,  operating
efficiencies,  revenue effects and financial synergies expected to result from a
merger with

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<PAGE>
FBS, projections regarding  under-performing and non-performing  assets and  net
charge-offs,  Goldman, Sachs assumed that they were reasonably prepared on bases
reflecting the best currently  available estimates and  judgments of the  future
competitive,   operating  and  regulatory  environments  and  related  financial
performance of First Interstate  or FBS, respectively,  and that such  forecasts
will  be realized in the  amounts and at the  times contemplated. Goldman, Sachs
did not make any independent valuation or appraisal of the assets or liabilities
of First Interstate or FBS,  nor was it furnished  with any such appraisals.  In
addition,  Goldman, Sachs  did not examine  any individual loan  credit files of
First Interstate or FBS. Goldman, Sachs assumed that the allowances for loan and
lease losses established by First Interstate and FBS are adequate to cover  such
losses,  and  derivatives, swaps,  foreign  exchange, financial  instruments and
off-balance lending-related financial  instruments of First  Interstate and  FBS
will not have an adverse effect that would be relevant to its analysis. Goldman,
Sachs  has also assumed that any  necessary regulatory approvals and third-party
consents obtained for  the Merger would  not have a  material adverse effect  on
First  Interstate, FBS or New First Interstate. Goldman, Sachs has also assumed,
based upon information provided by  senior management of First Interstate,  that
the Merger is of long-term strategic importance to First Interstate.

    Goldman,  Sachs further assumed that the  Merger would qualify as a tax-free
reorganization, would  be  accounted for  as  a pooling  of  interests  business
combination  under the requirements  of APB No.  16 and would  be consummated in
accordance with the terms of the  Merger Agreement. Goldman, Sachs' opinion  was
based  on  economic,  market and  other  conditions  as in  effect  on,  and the
information available to it as of, the  date of its opinion. Goldman, Sachs  did
not  express any opinion  as to the  price or range  of prices at  which the New
First Interstate Common Stock might trade subsequent to the Merger. In addition,
Goldman, Sachs' opinion did  not address the relative  merits of the Merger  and
alternative potential transactions. No opinion was rendered by Goldman, Sachs as
to  the fairness of the Merger to the  holders of any series of First Interstate
Preferred Stock.

OPINION OF MORGAN STANLEY

   
    At the  November 5,  1995  meeting of  the  First Interstate  Board,  Morgan
Stanley  rendered its written opinion to the  First Interstate Board that, as of
such date, the Exchange  Ratio was fair  from a financial point  of view to  the
holders of First Interstate Common Stock (other than FBS and its affiliates). At
the  November 19,  1995 meeting  of the  First Interstate  Board, Morgan Stanley
reaffirmed as of such date its opinion of November 5, 1995. Morgan Stanley  also
noted in its November 5, 1995 opinion that, as of that date, based upon publicly
available  information in the case of Wells, each of the .625 Exchange Ratio and
the .650 Exchange  Ratio would be  fair from a  financial point of  view to  the
holders of First Interstate Common Stock (other than Wells and its affiliates).
    

    THE FULL TEXT OF THE OPINIONS OF MORGAN STANLEY, WHICH SET FORTH ASSUMPTIONS
MADE,  MATTERS CONSIDERED AND  LIMITS ON THE REVIEW  UNDERTAKEN, ARE ATTACHED AS
APPENDIX H TO THIS JOINT PROXY STATEMENT/PROSPECTUS. NO LIMITATIONS WERE IMPOSED
BY  THE  FIRST  INTERSTATE  BOARD  UPON  MORGAN  STANLEY  WITH  RESPECT  TO  THE
INVESTIGATIONS  MADE OR  PROCEDURES FOLLOWED  BY IT  IN RENDERING  ITS OPINIONS.
FIRST INTERSTATE  SHAREHOLDERS  ARE  URGED  TO  READ  THESE  OPINIONS  IN  THEIR
ENTIRETY.  MORGAN STANLEY'S  OPINIONS ARE DIRECTED  ONLY TO THE  FAIRNESS FROM A
FINANCIAL POINT  OF  VIEW  OF  THE  EXCHANGE  RATIO  AND  DO  NOT  CONSTITUTE  A
RECOMMENDATION  TO ANY FIRST  INTERSTATE SHAREHOLDER AS  TO HOW SUCH SHAREHOLDER
SHOULD VOTE AT THE FIRST INTERSTATE SPECIAL MEETING. THE SUMMARY OF THE OPINIONS
OF MORGAN  STANLEY  SET  FORTH  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS  IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE FULL TEXT OF SUCH OPINIONS.

    In  connection  with rendering  its opinion  dated as  of November  5, 1995,
Morgan Stanley,  among other  things: (i)  analyzed certain  publicly  available
financial  statements  and  other  information  of  First  Interstate  and  FBS,
respectively; (ii) analyzed  internal financial statements  and other  financial
and  operating  data  concerning  First  Interstate  and  FBS  prepared  by  the
managements of First Interstate and FBS, respectively; (iii) analyzed  financial
projections   prepared  by  the   managements  of  First   Interstate  and  FBS,
respectively; (iv)  discussed  the past  and  current operations  and  financial
condition  and the prospects of First  Interstate and FBS with senior executives
of First Interstate and

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<PAGE>
FBS, respectively; (v) reviewed the reported prices and trading activity for the
First Interstate  Common Stock  and  the FBS  Common  Stock; (vi)  compared  the
financial  performance of  First Interstate and  FBS and the  prices and trading
activity of the First Interstate Common Stock and the FBS Common Stock with that
of certain other comparable bank  holding companies and their securities;  (vii)
discussed  the strategic objectives of the Merger  and the plan for the combined
company with  senior executives  of First  Interstate and  FBS; (viii)  analyzed
certain  pro forma  financial projections for  the combined  company prepared by
First  Interstate  and  FBS;  (ix)  reviewed  and  discussed  with  the   senior
managements  of First Interstate and FBS certain estimates of the potential cost
savings and anticipated revenue enhancements expected to result from the Merger;
(x) reviewed the financial terms, to  the extent publicly available, of  certain
comparable  bank  holding  company  merger  transactions;  (xi)  participated in
discussions  among  representatives  of  First  Interstate  and  FBS  and  their
financial  and legal advisors; (xii) reviewed  the proposed Merger Agreement and
certain related  agreements; and  (xiii)  performed such  other analyses  as  it
deemed appropriate.

    Morgan  Stanley assumed and relied upon without independent verification the
accuracy and completeness of the information reviewed by it for the purposes  of
its  November  5,  1995  opinion. With  respect  to  the  financial projections,
including estimates of cost savings and revenue enhancements expected to  result
from  the Merger, Morgan  Stanley assumed that they  were reasonably prepared on
bases reflecting the  best currently  available estimates and  judgments of  the
future  financial performance of First  Interstate and FBS, respectively. Morgan
Stanley also assumed that off-balance  sheet activities of First Interstate  and
FBS,  including derivatives  and other  similar financial  instruments, will not
adversely affect the future financial position and results of operations of  the
combined  enterprise. Morgan Stanley  did not make  any independent valuation or
appraisal of the assets or  liabilities of First Interstate  or FBS, nor was  it
furnished  with any such appraisals. In addition, Morgan Stanley did not examine
any individual loan credit files of First Interstate or FBS. Morgan Stanley also
assumed that the Merger will  be accounted for as  a pooling of interests  under
generally  accepted  accounting principals.  Morgan  Stanley's November  5, 1995
opinion was based on economic, market and other conditions as in effect on,  and
the information made available to it as of, the date of such opinion.

    Morgan  Stanley noted in its November 5,  1995 opinion that based on closing
prices on November 3, 1995, the indicated values of both the .625 Exchange Ratio
and the .650 Exchange Ratio were higher than the indicated value of the Exchange
Ratio. Morgan Stanley also  noted in its  November 5, 1995  opinion that, as  of
November 5, 1995 based upon publicly available information in the case of Wells,
each of the .625 Exchange Ratio and the .650 Exchange Ratio would have been fair
from  a financial point of view to  the holders of First Interstate Common Stock
(other than Wells and its affiliates).

    In connection with its opinion dated November 19, 1995, Morgan Stanley among
other things: (i)  reviewed the  reported prices  and trading  activity for  the
First  Interstate Common Stock and the FBS Common Stock from November 3, 1995 to
the date thereof; (ii) confirmed with senior managements of First Interstate and
FBS that there have been no material changes or developments in the  information
previously  provided  to it  by the  respective  managements in  connection with
Morgan Stanley's November 5,  1995 opinion, except  for information relating  to
the  Wells  Offer;  and  (iii)  performed  such  other  analyses  as  it  deemed
appropriate. In addition, the information, analyses, assumptions and limitations
contained or referred  to in Morgan  Stanley's November 5,  1995 opinion  letter
were  made a part of the November  19, 1995 opinion letter and were incorporated
therein by reference.

   
    In its  November 19,  1995 opinion  Morgan Stanley  noted that  it had  been
informed of the Wells Offer. Based on the closing price of Wells Common Stock on
November  17, 1995, Morgan  Stanley noted that  the implied market  value of the
Wells Offer would be $141.17 per  share of First Interstate Common Stock.  Based
on the closing price of FBS Common Stock on November 17, 1995, the implied value
of the Exchange Ratio was $137.80 per share of First Interstate Common Stock.
    

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<PAGE>
   
COMPARISON OF THE MERGER AND THE WELLS OFFER
    

   
    A   document  entitled  "Comparison  of  the  Proposed  First  Bank  System,
Inc./First Interstate Bancorp Merger and the Proposed Wells Fargo & Co. Exchange
Offer" (the  "Comparison") will  be  filed as  an  exhibit to  the  Registration
Statement.  The  Comparison  will  set  forth  the  analysis  of  FBS  and First
Interstate comparing the  Merger and  the Wells  Offer from  the perspective  of
shareholders  of First  Interstate. Copies of  the Comparison will  be mailed to
shareholders   of   First   Interstate   together   with   this   Joint    Proxy
Statement/Prospectus  and First  Interstate shareholders  are urged  to read the
Comparison carefully.  Holders of  FBS Common  Stock may  obtain copies  of  the
Comparison,  without  charge, upon  written or  oral request  from FBS  or First
Interstate by  following  the instructions  set  forth under  "Incorporation  of
Certain Documents by Reference."
    

CONVERSION OF FIRST INTERSTATE CAPITAL STOCK; EFFECTS ON FBS SHAREHOLDERS

    CONVERSION  OF FIRST INTERSTATE  COMMON STOCK.  At  the Effective Time, each
share of First Interstate  Common Stock outstanding, other  than shares held  in
First  Interstate's treasury, by any  of its subsidiaries or  held by FBS or any
subsidiary of FBS  (except, in both  cases, for Trust  Account Shares), will  be
converted  into the right to receive 2.60  shares of New First Interstate Common
Stock.

    CONVERSION OF FIRST INTERSTATE PREFERRED STOCK.  At the Effective Time, each
share  of  First  Interstate  9.875%  Preferred  Stock  issued  and  outstanding
immediately  prior to  the Effective  Time will be  converted into  the right to
receive one share of New First Interstate 9.875% Preferred Stock and each  share
of  First  Interstate 9.0%  Preferred Stock  issued and  outstanding immediately
prior to the  Effective Time will  be converted  into the right  to receive  one
share  of New First Interstate 9.0% Preferred  Stock. The terms of the New First
Interstate 9.875% Preferred Stock  and the New  First Interstate 9.0%  Preferred
Stock will be substantially the same as the terms of the corresponding series of
First  Interstate Preferred  Stock. See  "The Merger  -- Certain  Differences in
Rights of Shareholders  of First Interstate  and New First  Interstate." At  the
Effective  Time,  New  First Interstate  will  assume the  obligations  of First
Interstate under the Deposit Agreement, dated  as of November 14, 1991,  between
First  Interstate  and  First  Interstate  Bank  of  California,  as  depositary
(relating to  the First  Interstate  9.875% Preferred  Stock), and  the  Deposit
Agreement,  dated  as  of  May  29, 1992,  between  First  Interstate  and First
Interstate Bank of California, as  depositary (relating to the First  Interstate
9.0%  Preferred Stock). New First Interstate will instruct First Interstate Bank
of California  (the  "Depositary"), as  depositary  under each  of  the  deposit
agreements  (the  "Deposit  Agreements"),  to  treat  the  shares  of  New First
Interstate Preferred  Stock received  by  it in  exchange  for shares  of  First
Interstate  Preferred  Stock as  new deposited  securities under  the applicable
Deposit Agreement.  In  accordance  with  the  terms  of  the  relevant  Deposit
Agreement,  the  First  Interstate  Depositary  Receipts  then  outstanding will
thereafter represent the shares of the  relevant series of New First  Interstate
Preferred  Stock. New First Interstate will request that the Depositary call for
surrender  of  all  outstanding  First  Interstate  Depositary  Receipts  to  be
exchanged  for New First Interstate Depositary Receipts evidencing the New First
Interstate Depositary Shares. See "Description  of FBS and New First  Interstate
Capital Stock."

    Each outstanding share of First Interstate Capital Stock owned by FBS or its
subsidiaries  or First Interstate or its  subsidiaries (except for Trust Account
Shares) or  by  First Interstate  as  treasury stock  will  be canceled  at  the
Effective  Time  and will  cease to  exist, and  no securities  of FBS  or other
consideration will be delivered in exchange  therefor. All shares of FBS  Common
Stock  that are owned by First Interstate  or its subsidiaries (except for Trust
Account Shares) will become treasury stock of FBS.

    CONVERSION OF  FIRST INTERSTATE  STOCK OPTIONS.   Upon  consummation of  the
Merger,  each First Interstate Stock Option  issued by First Interstate pursuant
to  any  First  Interstate  Stock  Plan  that  is  outstanding  and  unexercised
immediately  prior to the Effective Time  will be converted automatically into a
New First Interstate Option  to purchase shares of  New First Interstate  Common
Stock with (i) the number of shares of New First Interstate Common Stock subject
to  the New First Interstate Option being equal  to the product of the number of
shares of First Interstate Common Stock subject to

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<PAGE>
the First Interstate Stock Option multiplied  by the Exchange Ratio and  rounded
down  to the nearest  share and (ii) the  exercise price per  share of New First
Interstate Common Stock subject to the  New First Interstate Option being  equal
to the exercise price per share of First Interstate Common Stock under the First
Interstate  Stock Option  divided by  the Exchange Ratio  and rounded  up to the
nearest cent. The conversion is  intended to be effected  in a manner such  that
any First Interstate Stock Options that are "incentive stock options" within the
meaning of Section 422 of the Code shall remain so. As discussed below, pursuant
to the terms of the First Interstate Stock Plans and the FBS stock option plans,
respectively,  each First Interstate Stock Option  held by active employees will
vest and  become exercisable,  and  each option  to  purchase FBS  Common  Stock
granted  under the FBS Stock  Option Plans will vest  and become exercisable, in
connection with the Merger. See "--  Conduct of Business Pending the Merger  and
Other  Agreements"  and  "--  Interests  of  Certain  Persons  in  the  Merger."
Consummation of  the Merger  will constitute  a  change in  control of  FBS  for
purposes  of FBS's benefit plans, and approval  of the Merger Agreement by First
Interstate's  shareholders  will  constitute  a  change  in  control  of   First
Interstate  for purposes  of First  Interstate's benefit  plan. Other  than with
respect to the acceleration of the exercisability of such First Interstate Stock
Options upon  approval of  the Merger  Agreement by  the shareholders  of  First
Interstate,  the  duration and  other terms  of the  New First  Interstate Stock
Options shall be the same as the predecessor First Interstate Stock Options.

    EFFECT ON FBS SHAREHOLDERS.  At the Effective Time, each share of FBS Common
Stock then  issued and  outstanding will  continue  as one  share of  New  First
Interstate  Common Stock. Also  at the Effective  Time, each share  of FBS 1991A
Preferred Stock  then issued  and  outstanding will  continue  as one  share  of
preferred stock of New First Interstate.

EXCHANGE OF CERTIFICATES AND DEPOSITARY RECEIPTS; FRACTIONAL SHARES

    FIRST  INTERSTATE.  At or prior to  the Effective Time, FBS will deposit, or
cause to  be  deposited, with  First  Chicago Trust  Company  of New  York  (the
"Exchange  Agent"),  for the  benefit of  the holders  of certificates  of First
Interstate Capital  Stock, certificates  representing the  shares of  New  First
Interstate  Common Stock and  New First Interstate Preferred  Stock (and cash in
lieu of fractional shares of New First Interstate Capital Stock, if applicable).

    As soon as is practicable  after the Effective Time,  and in no event  later
than  ten  business days  thereafter, the  Exchange  Agent will  mail a  form of
transmittal letter to the holders  of certificates representing shares of  First
Interstate   Capital  Stock.  The  form   of  transmittal  letter  will  contain
instructions with respect to the surrender of such certificates in exchange  for
shares  of New First  Interstate Capital Stock  (and cash in  lieu of fractional
shares of New First Interstate Common Stock, if applicable).

    THE DEPOSITARY IS THE  ONLY HOLDER OF RECORD  OF SHARES OF FIRST  INTERSTATE
PREFERRED  STOCK,  WHICH  ARE  REPRESENTED BY  THE  FIRST  INTERSTATE DEPOSITARY
SHARES. THE EXCHANGE AGENT WILL EFFECT THE EXCHANGE OF CERTIFICATES REPRESENTING
THE FIRST INTERSTATE PREFERRED STOCK FOR CERTIFICATES REPRESENTING THE NEW FIRST
INTERSTATE PREFERRED STOCK IN CONNECTION WITH THE MERGER. ALL HOLDERS OF  RECORD
OF  FIRST INTERSTATE DEPOSITARY SHARES  EVIDENCED BY FIRST INTERSTATE DEPOSITARY
RECEIPTS SHOULD FOLLOW THE EXCHANGE PROCEDURES OUTLINED IMMEDIATELY BELOW.

    Promptly after the Effective Time, the  Depositary will mail to each  holder
of  record of First Interstate Depositary Shares a notice advising the holder of
the  effectiveness  of  the  Merger  accompanied  by  a  transmittal  form  (the
"Depositary  Receipt Transmittal Form"). The Depositary Receipt Transmittal Form
will contain  instructions with  respect to  the surrender  of First  Interstate
Depositary  Receipts  evidencing  First Interstate  Depositary  Shares  and will
specify that delivery will be effected, and risk of loss and title to such First
Interstate Depositary  Receipts  will pass,  only  upon delivery  of  the  First
Interstate  Depositary Receipts to the  Depositary. Upon surrender in accordance
with the instructions contained in  the Depositary Receipt Transmittal Form,  to
the Depositary of

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<PAGE>
First  Interstate  Depositary  Receipts evidencing  First  Interstate Depositary
Shares, the holder thereof will be entitled to receive in exchange therefor  New
First  Interstate Depositary Receipts  evidencing the appropriate  number of New
First Interstate Depositary Shares.

    FIRST INTERSTATE STOCK CERTIFICATES AND FIRST INTERSTATE DEPOSITARY RECEIPTS
SHOULD NOT BE RETURNED WITH THE ENCLOSED PROXY CARD AND SHOULD NOT BE  FORWARDED
TO  THE EXCHANGE AGENT OR  THE DEPOSITARY EXCEPT WITH  A TRANSMITTAL FORM, WHICH
WILL BE PROVIDED TO HOLDERS FOLLOWING THE EFFECTIVE TIME.

    No dividends  or other  distributions  declared with  respect to  New  First
Interstate  Common Stock or New First  Interstate Preferred Stock (including the
related New First  Interstate Depositary Shares)  with a record  date after  the
Effective Time will be paid to the holder of any certificate representing shares
of  First Interstate  Capital Stock or  any First  Interstate Depositary Receipt
until such certificate or receipt has been surrendered for exchange. Holders  of
certificates  representing  shares of  First  Interstate Common  Stock  or First
Interstate Preferred Stock (or First Interstate Depositary Receipts representing
First Interstate Depositary  Shares) will  be paid  the amount  of dividends  or
other  distributions with a record date after the Effective Time after surrender
of such certificates, without any interest thereon.

    No fractional shares of New First Interstate Common Stock will be issued  to
any  holder of First Interstate Common Stock upon consummation of the Merger. In
lieu of each fractional share that would otherwise be issued, FBS will pay  cash
in  an amount equal  to such fraction  multiplied by the  average of the closing
sale prices of  FBS Common  Stock on  the NYSE as  reported by  THE WALL  STREET
JOURNAL  for  the  five  trading  days immediately  preceding  the  date  of the
Effective Time. No  interest will  be paid  or accrued on  the cash  in lieu  of
fractional  shares payable to holders of  such certificates. No such holder will
be entitled to dividends, voting rights or any other rights as a shareholder  in
respect  of any fractional share of New  First Interstate Common Stock that such
holder otherwise would have been entitled to receive.

    None of FBS, First Interstate, the  Exchange Agent or any other person  will
be  liable to any former holder of First Interstate Capital Stock for any amount
delivered in good faith  to a public official  pursuant to applicable  abandoned
property, escheat or similar laws.

    If  a certificate  representing First  Interstate Capital  Stock or  a First
Interstate Depositary Receipt has been  lost, stolen or destroyed, the  Exchange
Agent  will  issue the  consideration properly  payable  in accordance  with the
Merger Agreement upon receipt of appropriate evidence as to such loss, theft  or
destruction,  appropriate evidence  as to the  ownership of  such certificate or
receipt by the claimant, and appropriate and customary indemnification.

    For a description of  the differences between the  rights of the holders  of
New  First Interstate Capital Stock and  First Interstate Capital Stock, see "--
Certain Differences in Rights of Shareholders of First Interstate and New  First
Interstate."  For  a  description of  the  New First  Interstate  Capital Stock,
including the New First Interstate Preferred Stock and the New First  Interstate
Depositary  Shares, see  "Description of  FBS and  New First  Interstate Capital
Stock."

    FBS.  Shares of FBS  Common Stock and FBS  1991A Preferred Stock issued  and
outstanding  immediately  prior to  the Effective  Time  will remain  issued and
outstanding and be unaffected by the Merger, and holders of such stock will  not
be  required to  exchange the certificates  representing such stock  or take any
other action by reason of the consummation of the Merger. See "-- Conversion  of
First Interstate Capital Stock; Effects on FBS Shareholders."

REPRESENTATIONS AND WARRANTIES

    In   the  Merger   Agreement  each  of   FBS  and   First  Interstate  makes
representations and warranties to the  other regarding, among other things,  (i)
its  corporate organization  and existence;  (ii) its  capitalization; (iii) its
corporate power  and  authority  to  enter  into,  and  its  due  authorization,
execution  and  delivery of,  the Merger  Agreement  and related  agreements and
documents; (iv) the Merger

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<PAGE>
   
Agreement and related  agreements and  documents not violating  its charter  and
bylaws,   applicable  law   and  certain   material  agreements;   (v)  required
governmental  and  third  party  approvals;  (vi)  timely  filing  of   required
regulatory  reports;  (vii)  its  financial  statements  and  filings  with  the
Commission; (viii)  its investment  banking arrangements;  (ix) the  absence  of
certain  materially adverse changes in its business since June 30, 1995; (x) the
absence of legal proceedings as to which there is a reasonable probability of an
adverse determination and which, if adversely determined, would, individually or
in the aggregate,  have or  reasonably be expected  to have  a material  adverse
effect  on the  business, results of  operations or financial  condition of such
party and its subsidiaries taken as a whole or a material adverse effect on such
party's ability  to  consummate  the transactions  contemplated  by  the  Merger
Agreement;  (xi) the filing and accuracy of  its tax returns; (xii) its employee
benefit plans and related  matters; (xiii) its  compliance with applicable  law;
(xiii)  the absence of  material defaults under certain  of its contracts; (xiv)
the absence of agreements between it  and regulatory agencies; (xv) the  absence
of  undisclosed  liabilities;  (xvi)  the  inapplicability  to  the transactions
contemplated by the Merger Agreement of  Section 203 of the DGCL (which  relates
to  certain  business combinations  specified in  such  statute) and  of similar
statutes of  other  states;  (xvii)  the  Merger  Agreement,  the  Stock  Option
Agreement  and the transactions contemplated thereby  not resulting in the grant
of any rights  to any  person under  such party's  respective Rights  Agreement;
(xviii)   environmental  liabilities;  and  (xix)  certain  interest  rate  risk
management instruments. In the  opinion of FBS and  First Interstate, as of  the
date  of this Joint  Proxy Statement/Prospectus, there  is no pending litigation
that would cause this representation in clause (x) above to be untrue.
    

CONDUCT OF BUSINESS PENDING THE MERGER AND OTHER AGREEMENTS

    Pursuant to the Merger Agreement, prior to the Effective Time, FBS and First
Interstate have each agreed to, and  to cause their respective subsidiaries  to,
(i)  conduct its business  in the usual, regular  and ordinary course consistent
with past  practice,  (ii) use  its  reasonable  best efforts  to  maintain  and
preserve  intact its business organization,  employees and advantageous business
relationships and retain  the services  of its  officers and  key employees  and
(iii)  refrain from taking any  action that would adversely  affect or delay the
ability of either  FBS or First  Interstate to obtain  any Requisite  Regulatory
Approvals or to perform its covenants and agreements under the Merger Agreement,
the Stock Option Agreements and the Fee Agreements.

    In  addition, except  as expressly contemplated  by the  Merger Agreement or
specified in  a  schedule  thereto  or  as  contemplated  by  the  Stock  Option
Agreements,  each  of FBS  and  First Interstate  has  agreed that,  without the
consent of  the other  party, it  and  its subsidiaries  will not,  among  other
things: (i) declare or pay dividends in a manner inconsistent with past practice
or make any other distribution on, or directly or indirectly redeem, purchase or
otherwise  acquire,  any  shares  of  its capital  stock  or  any  securities or
obligations convertible into or exchangeable for any shares of its capital stock
or issue  any additional  shares of  capital stock  except pursuant  to  certain
exceptions  set  forth in  the  Merger Agreement;  (ii)  dispose of  any  of its
material properties or  assets or  make any material  acquisition or  investment
except  in  the ordinary  course of  business consistent  with past  practice or
pursuant to certain exceptions set forth  in the Merger Agreement; (iii)  except
for  transactions  in  the  ordinary course  of  business  consistent  with past
practice, enter  into, amend  or terminate  any material  contract or  agreement
other  than renewals of contracts and leases without material adverse changes of
terms; or  (iv) increase  the compensation  or  fringe benefits  of any  of  its
employees  or  enter into  or modify  any employee  benefit plans  or employment
agreements except  in  the ordinary  course  of business  consistent  with  past
practice  or in an  aggregate amount not  exceeding $10 million  or as otherwise
disclosed to the other party in connection with the Merger Agreement.

    In the Merger Agreement, each party has agreed not to, and not to  authorize
or  permit any of its  officers, directors, employees or  agents to, directly or
indirectly solicit,  initiate or  encourage any  inquiries relating  to, or  the
making  of any  proposal which  constitutes, a  "Takeover Proposal"  (as defined
below),  recommend  or  endorse  any  Takeover  Proposal,  participate  in   any
discussions  or  negotiations  regarding any  Takeover  Proposal,  provide third
parties with  any nonpublic  information relating  to any  Takeover Proposal  or
otherwise   facilitate  any   effort  or   attempt  to   make  or   implement  a

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<PAGE>
Takeover Proposal; PROVIDED, HOWEVER, that each party may, and may authorize and
permit its officers, directors,  employees or agents  to, provide third  parties
with nonpublic information, or otherwise facilitate any effort or attempt by any
third  party to make or implement a  Takeover Proposal, recommend or endorse any
Takeover Proposal with or by any third party and participate in discussions  and
negotiations  with any  third party  relating to  any Takeover  Proposal if such
party's Board  of Directors,  after  having consulted  with and  considered  the
advice  of outside counsel, reasonably determines in good faith that the failure
to do so  would cause the  members of such  Board of Directors  to breach  their
fiduciary  duties under  applicable law. Each  party is obligated  to advise the
other party immediately following receipt of a Takeover Proposal and to  further
advise the other party immediately of any developments relating thereto. As used
in the Merger Agreement, "Takeover Proposal" means any tender or exchange offer,
proposal  for a  merger, consolidation  or other  business combination involving
First Interstate or FBS or any of their respective subsidiaries or any  proposal
or  offer  to acquire  in  any manner  a substantial  equity  interest in,  or a
substantial portion of the assets  of, First Interstate or  FBS or any of  their
respective subsidiaries other than the transactions contemplated or permitted by
the Merger Agreement.

    FBS  and  First Interstate  have also  agreed to  use their  reasonable best
efforts to promptly prepare and file  all necessary documentation to effect  all
applications,  notices, petitions and filings, and to obtain and to cooperate in
obtaining permits, consents, approvals and  authorizations of all third  parties
and  governmental entities necessary or advisable to consummate the transactions
contemplated by the Merger Agreement and to comply with the terms and conditions
of all  such permits,  consents,  approvals and  authorizations. FBS  and  First
Interstate  have, subject to the restrictions set forth in the Merger Agreement,
each agreed,  upon  request, to  furnish  to  the other  party  all  information
concerning   themselves   and  their   subsidiaries,  directors,   officers  and
shareholders and such other  matters as may be  necessary in furtherance of  the
Merger.  FBS and  First Interstate  have also agreed,  subject to  the terms and
conditions of the Merger Agreement, to use their best efforts to take, or  cause
to  be taken, all actions necessary, proper or advisable to comply promptly with
all legal requirements which  may be imposed on  such party or its  subsidiaries
and  to consummate the Merger. FBS has further agreed to use its best efforts to
cause the  shares  of  New First  Interstate  Common  Stock and  the  New  First
Interstate  Depositary Shares  to be  issued in  the Merger  to be  approved for
listing on the NYSE, subject to official notice of issuance.

    FBS and First Interstate have also agreed that the employee benefit plans in
place at  the  Effective  Time  with  respect to  employees  of  FBS  and  First
Interstate  (the "FBS Benefit  Plans" and the  "First Interstate Benefit Plans,"
respectively), as the  case may  be, will remain  in effect  for such  employees
until  such time  as New  First Interstate  adopts new  benefit plans  (the "New
Benefit Plans") covering employees of both  parties who continue to be  employed
by  New First Interstate  or any of  its subsidiaries. FBS  and First Interstate
have stated  their intention  to develop  New Benefit  Plans that,  among  other
things,  treat similarly situated employees on a substantially equivalent basis,
taking into account all relevant factors, including, without limitation, duties,
geographic location, tenure, qualifications  and abilities. Notwithstanding  the
foregoing,  New First Interstate  will honor in accordance  with their terms all
benefits that had vested as  of the date of the  Merger Agreement under the  FBS
Benefit  Plans and  the First  Interstate Benefit  Plans or  under certain other
contracts, arrangements, commitments,  or understandings  disclosed between  the
parties.

   
    The approval of the Merger Agreement by First Interstate's shareholders will
constitute  a  change  in  control  of First  Interstate  for  purpose  of First
Interstate's benefit plans,  and consummation  of the Merger  will constitute  a
change  in  control of  FBS for  purposes of  FBS's benefit  plans; accordingly,
provisions of certain  of these  benefit plans  will cause  the acceleration  of
vesting  of certain  equity-based incentives  and payment  of certain cash-based
incentives. New  First  Interstate  also  will be  obligated  to  indemnify  the
officers  and directors of FBS and First Interstate for any liabilities incurred
in connection  with  any  matters existing  or  occurring  at or  prior  to  the
Effective  Time and to  provide Directors and  Officers liability insurance with
respect to such matters for six years.  See "-- Interests of Certain Persons  in
the Merger."
    

                                       68
<PAGE>
CONDITIONS TO THE CONSUMMATION OF THE MERGER

    Each party's obligation to effect the Merger is subject, among other things,
to  satisfaction, at or prior to the Effective Time of the following conditions:
(i) the Merger Agreement  and the transactions  contemplated thereby shall  have
been  approved and adopted by the requisite  affirmative votes of the holders of
First Interstate Common Stock and the FBS Vote Matters shall have been  approved
by  the requisite votes of  the holders of FBS Common  Stock; (ii) the shares of
New First Interstate Common Stock and the New First Interstate Depositary Shares
to be issued in the Merger shall  have been authorized for listing on the  NYSE,
subject  to official notice of issuance; (iii) all regulatory approvals required
to consummate the transactions contemplated  by the Merger Agreement shall  have
been  obtained  and shall  remain in  full  force and  effect and  all statutory
waiting periods in respect  thereof shall have expired  (all such approvals  and
the  expiration of  all such  waiting periods  being referred  to herein  as the
"Requisite Regulatory Approvals"),  and no Requisite  Regulatory Approval  shall
contain  any conditions  or restrictions that  the Board of  Directors of either
party reasonably determines will have or could reasonably be expected to have  a
material adverse effect on New First Interstate (a "Burdensome Condition"); (iv)
the Registration Statement shall have become effective under the Securities Act,
no  stop order suspending the effectiveness  of the Registration Statement shall
have been issued and no proceedings  for that purpose shall have been  initiated
or  threatened by the Commission; and (v)  no order, injunction or decree issued
by any court  or agency of  competent jurisdiction or  other legal restraint  or
prohibition  preventing  the consummation  of  the Merger  or  any of  the other
transactions contemplated by  the Merger  Agreement shall  be in  effect and  no
statute,  rule, regulation, order, injunction or decree shall have been enacted,
entered or promulgated which prohibits, restricts or makes illegal  consummation
of the Merger.

    FBS's  obligation to effect the Merger  is also subject, among other things,
to the satisfaction or waiver by FBS at or prior to the Effective Time of, among
others, the following conditions: (i) (x) certain representations and warranties
of First  Interstate  set forth  in  the Merger  Agreement  (including,  without
limitation,  the representation that since June  30, 1995, no event has occurred
which has had or would  reasonably be expected to  have, individually or in  the
aggregate,  a "Material Adverse Effect"  (as such term is  defined in the Merger
Agreement) on First Interstate or the  Surviving Corporation) shall be true  and
correct  in all  material respects as  of the  date of the  Merger Agreement and
(except to the extent such representations and warranties speak as of an earlier
date) as of the Effective  Time as though made on  and as of the Effective  Time
and  (y) the representations and warranties of First Interstate set forth in the
Merger Agreement  other  than those  specifically  enumerated in  the  provision
described  in clause (x) hereof shall be true  and correct in all respects as of
the date of the Merger Agreement and (except to the extent such  representations
and  warranties speak as of an earlier date)  as of the Effective Time as though
made on and as of  the Effective Time; provided,  however, that for purposes  of
determining  the satisfaction of the condition  described in this clause (y), no
effect shall be given  to any exception in  such representations and  warranties
relating  to materiality  or a Material  Adverse Effect,  and provided, further,
however, that, for purposes of the provision described in this clause (y),  such
representations  and warranties shall  be deemed to  be true and  correct in all
respects unless the failure or  failures of such representations and  warranties
to  be so true and  correct, individually or in  the aggregate, results or would
reasonably be  expected  to  result  in  a  Material  Adverse  Effect  on  First
Interstate  and its subsidiaries  taken as a whole;  (ii) First Interstate shall
have performed in all material respects all obligations required to be performed
by it under the Merger  Agreement at or prior to  the Effective Time; (iii)  the
First Interstate Rights issued pursuant to the First Interstate Rights Agreement
shall  not  have  become nonredeemable,  exercisable,  distributed  or triggered
pursuant to the terms of such agreement;  (iv) receipt of a letter from Ernst  &
Young  LLP, addressed to FBS, dated as of the Effective Time, to the effect that
the Merger will qualify for "pooling-of-interests" accounting treatment; and (v)
receipt  of  an  opinion  of  Dorsey  &  Whitney  P.L.L.P.,  addressed  to  FBS,
substantially  to the effect that the  Merger will qualify as a "reorganization"
under Section 368(a) of the Code.

                                       69
<PAGE>
    First Interstate's obligation to  effect the Merger  is also subject,  among
other  things, to: the satisfaction or waiver by First Interstate at or prior to
the Effective Time of, among others,  the following conditions: (i) (x)  certain
representations  and  warranties  of  FBS  set  forth  in  the  Merger Agreement
(including, without limitation, the representation that since June 30, 1995,  no
event  has  occurred which  has had  or  would reasonably  be expected  to have,
individually or in  the aggregate, a  Material Adverse Effect  on FBS) shall  be
true and correct in all material respects as of the date of the Merger Agreement
and  (except to the  extent such representations  and warranties speak  as of an
earlier date) as of the Effective Time as though made on and as of the Effective
Time and (y) the representations and warranties  of FBS set forth in the  Merger
Agreement other than those specifically enumerated in the provision described in
clause  (x) hereof shall be true  and correct in all respects  as of the date of
the Merger  Agreement  and  (except  to  the  extent  such  representations  and
warranties  speak as of an earlier date) as of the Effective Time as though made
on and  as  of the  Effective  Time; provided,  however,  that for  purposes  of
determining  the satisfaction of the condition  described in this clause (y), no
effect shall be given  to any exception in  such representations and  warranties
relating  to materiality  or a Material  Adverse Effect,  and provided, further,
however, that, for purposes of the provision described in this clause (y),  such
representations  and warranties shall  be deemed to  be true and  correct in all
respects unless the failure or  failures of such representations and  warranties
to  be so true and  correct, individually or in  the aggregate, results or would
reasonably be expected to  result in a  Material Adverse Effect  on FBS and  its
subsidiaries  taken as a  whole; (ii) FBS  shall have performed  in all material
respects all  obligations  required to  be  performed  by it  under  the  Merger
Agreement  at  or prior  to  the Effective  Time;  (iii) the  FBS  Rights issued
pursuant to  the  FBS Rights  Agreement  shall not  have  become  nonredeemable,
exercisable,  distributed or triggered pursuant to  the terms of such agreement;
(iv) receipt of a letter from Ernst & Young LLP, addressed to First  Interstate,
dated  as of the Effective Time, to the  effect that the Merger will qualify for
"pooling-of-interests" accounting treatment;  and (v) receipt  of an opinion  of
Skadden,   Arps,  Slate,  Meagher   &  Flom,  addressed   to  First  Interstate,
substantially to the effect that, the Merger will qualify as a  "reorganization"
under Section 368(a) of the Code.

REGULATORY APPROVALS REQUIRED

    Under the Merger Agreement, the obligations of both FBS and First Interstate
to  consummate  the Merger  are conditioned  upon the  receipt of  all Requisite
Regulatory Approvals (without the imposition  of any Burdensome Condition).  See
"--  Conditions to Consummation of the Merger." Each of FBS and First Interstate
has agreed to use its best efforts to obtain the Requisite Regulatory Approvals.
There can be no assurance that any applicable regulatory authority will  approve
or  take any required action with respect to  the Merger (or if such approval is
given, that no Burdensome Condition will be  imposed) or as to the date of  such
regulatory  approval or other action. FBS and  First Interstate are not aware of
any governmental approvals or actions that  are required in order to  consummate
the Merger except the Requisite Regulatory Approvals, which are described below.
Should  any  other approval  or  action be  required,  FBS and  First Interstate
currently intend to seek such approval or  action. There can be no assurance  as
to whether or when any such other required approval or action could be obtained.

    The  acquisition of  First Interstate  Common Stock  by FBS  pursuant to the
First Interstate Stock Option Agreement and the acquisition of FBS Common  Stock
by  First Interstate pursuant to the FBS Stock Option Agreement would be subject
to approval by the Federal Reserve  Board under Sections 3(a)(3) and 4(c)(8)  of
the  BHC  Act and  to approval  by most,  if  not all,  of the  state regulatory
authorities that must approve the Merger. See "-- Stock Option Agreements."

    FEDERAL RESERVE BOARD.  The Merger is  subject to the prior approval of  the
Federal  Reserve Board under Sections 3(a)(3) and  4(c)(8) of the BHC Act. Under
the BHC Act, the Federal Reserve  Board is required, in approving a  transaction
such  as the  Merger, to  take into  consideration the  financial and managerial
resources and future prospects of the existing and proposed institutions and the
convenience and needs of the communities to be served. The BHC Act prohibits the
Federal Reserve Board from approving the Merger if it would result in a monopoly
or be in furtherance of any combination or

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conspiracy to monopolize or to attempt to monopolize the business of banking  in
any  part of the United  States. The BHC Act  also prohibits the Federal Reserve
Board from approving  the Merger  if its  effect in  any section  of the  United
States  may be substantially to lessen competition or tend to create a monopoly,
or if it would in  any other manner result in  a restraint of trade, unless  the
Federal  Reserve Board finds that the  anticompetitive 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,  the  Douglas Amendment  to  the BHC  Act,  as amended  by  the
Riegle-Neal  Interstate Banking and Branching Efficiency  Act of 1994 (the "IBBE
Act"), authorizes "adequately capitalized" and "adequately managed" bank holding
companies to make acquisitions  of banks located anywhere  in the United  States
without  regard to state  laws that might  otherwise prohibit such transactions.
The Federal Reserve Board's authority to approve such transactions, however,  is
subject  to compliance  with the following  conditions: (i)  the Federal Reserve
Board must consider a bank holding company's record of compliance with Community
Reinvestment Act  of 1977,  as amended  (the "Community  Reinvestment Act")  and
similar state laws; (ii) the Federal Reserve Board may not approve a transaction
if  a bank  holding company  controls, or would  control, deposits  in excess of
applicable state or federal  concentration limits (a  "deposit cap"); and  (iii)
the  Federal Reserve Board  may not approve  a transaction if  the bank(s) to be
acquired by a bank holding company do not satisfy any state-imposed minimum  age
requirements  (up to a maximum  of five years). Of  the thirteen states in which
First Interstate has a bank subsidiary, three states have both a deposit cap and
a minimum  age requirement  (Colorado,  Montana, and  Texas),  one state  has  a
deposit  cap but no  minimum age requirement  (New Mexico), seven  states have a
minimum age requirement but no deposit cap (Alaska, Idaho, Nevada, Oregon, Utah,
Washington, and Wyoming),  and two  states have no  deposit cap  or minimum  age
requirement (Arizona and California).

    Finally,  under the  Community Reinvestment  Act, the  Federal Reserve Board
must take into account the record of performance of FBS's and First Interstate's
existing depository institution subsidiaries in meeting the credit needs of  the
entire  community, including  low- and moderate-income  neighborhoods, served by
such institutions.

    ALASKA DEPARTMENT  OF  COMMERCE AND  ECONOMIC  DEVELOPMENT.   Under  Section
06.05.570(a)  of the  Alaska Banking  Code, FBS  must obtain  a permit  from the
Alaska Department of  Commerce and  Economic Development before  it may  acquire
First  Interstate and First Interstate Bank  of Alaska, National Association. In
determining whether to issue  a permit, the Department  is required to  consider
(i)  the benefits to the public, (ii)  the preservation of a competitive banking
industry, and  (iii) the  maintenance of  a  safe and  sound bank  industry.  In
addition,  FBS may  not acquire  First Interstate  and First  Interstate Bank of
Alaska, National Association  unless First Interstate  Bank of Alaska,  National
Association  was either (i)  established on or  before July 1,  1982 or, (ii) if
established after that date,  has been in  existence and continuously  operating
for  a period  of three  years or  more. With  respect to  compliance with these
requirements, First Interstate Bank of Alaska, National Association has been  in
existence and continuously operating for more than three years.

    ARIZONA  SUPERINTENDENT OF BANKING.   FBS's acquisition  of First Interstate
and First Interstate  Bank of Arizona,  National Association is  subject to  the
prior approval of the Arizona Superintendent of Banking under Sections 6-144 and
6-322  of  the  Arizona Revised  Statutes.  The Superintendent  must  deny FBS's
application to acquire First  Interstate and First  Interstate Bank of  Arizona,
National  Association  if  he finds  any  of  the following:  (i)  the financial
condition of FBS is such that it may jeopardize the financial stability of First
Interstate Bank of Arizona, National  Association or prejudice the interests  of
the  depositors, beneficiaries,  creditors, or shareholders  of First Interstate
Bank of Arizona,  National Association; (ii)  any plan or  proposal to merge  or
consolidate  First Interstate Bank  of Arizona, National  Association or to make
any other major change  in the business, corporate  structure, or management  of
First  Interstate  Bank  of  Arizona,  National  Association  is  not  fair  and
reasonable to the depositors, beneficiaries, creditors, or shareholders of First
Interstate Bank of Arizona,  National Association; (iii)  FBS has exhibited,  or
has acquired a reputation for, such lack of

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honesty  or integrity to  indicate that it would  not be in  the interest of the
depositors, beneficiaries, creditors, or  shareholders of First Interstate  Bank
of Arizona, National Association or in the interest of the public, to permit FBS
to  control First  Interstate Bank  of Arizona,  National Association;  (iv) FBS
neglects, fails,  or  refuses  to  furnish  any  information  requested  by  the
Superintendent;  or (v) the  acquisition is contrary to  law. In addition, under
Section 6-322(A)  of the  Arizona  Revised Statutes,  FBS  may not  acquire  and
operate  First Interstate Bank of Arizona, National Association as a bank unless
First Interstate Bank of Arizona, National Association's home office will remain
in the State of Arizona.

    ARIZONA DIRECTOR OF INSURANCE.   Under Section  20-481.02(B) of the  Arizona
Revised  Statutes, FBS must provide at least 30-days prior written notice to the
Director of Insurance (the "Director") of its intent to acquire First Interstate
and its  second-tier insurance  company subsidiary,  First Interstate  Insurance
Company.  The Director  must issue  an order  disapproving FBS's  acquisition of
First Interstate Insurance Company and requiring its expeditious divestiture  if
he  finds  that the  acquisition of  control: (i)  is contrary  to law;  (ii) is
inequitable to the  shareholders of  First Interstate  Insurance Company;  (iii)
would  substantially  reduce  the security  of  and  service to  be  rendered to
policyholders of First Interstate Insurance Company  in the State of Arizona  or
elsewhere;  (iv) after the change of  control First Interstate Insurance Company
would not  be  able  to  satisfy  the  requirements  for  the  reissuance  of  a
certificate of authority to write the line or lines of insurance for which it is
presently  licensed; (v) the  effect of the  acquisition of control  would be to
substantially lessen competition in insurance in the State of Arizona or tend to
create a monopoly;  (vi) the  financial condition  of FBS  might jeopardize  the
financial  stability  of First  Interstate  Insurance Company  or  prejudice the
interest of its  policyholders; (vii)  the plans or  proposals that  FBS has  to
liquidate First Interstate Insurance Company, sell its assets, or consolidate or
merge  it with any person, or to make  any other material change in its business
or  corporate  structure   or  management,  are   unfair  and  unreasonable   to
policyholders  of First Interstate  Insurance Company and are  not in the public
interest; (viii) the competence, experience, and integrity of FBS are such  that
it  would not be in the interest  of policyholders of First Interstate Insurance
Company and of  the public to  permit the  acquisition of control;  or (ix)  the
acquisition  is likely  to be hazardous  or prejudicial  to the insurance-buying
public.

    CALIFORNIA SUPERINTENDENT OF BANKING.  FBS's acquisition of First Interstate
and its California bank subsidiaries, First Interstate Bank of California, First
Interstate Bank,  Ltd.,  and  First Interstate  Central  Bank  (the  "California
Banks")  as a  result of  the Merger  is subject  to the  prior approval  of the
California Superintendent  of Banking  under Section  701(c) of  the  California
Financial  Code.  Under  Section  703  of  the  California  Financial  Code, the
Superintendent  must  deny  FBS's  application  to  acquire  control  of   First
Interstate  and  the  California  Banks  if  he  finds  that:  (i)  the proposed
acquisition of control would result in a monopoly or would be in furtherance  of
any  combination or  conspiracy to  monopolize or  to attempt  to monopolize the
business of banking in any part of  the State of California; (ii) the effect  of
the  proposed acquisition of control  in any section of  the State of California
may be to substantially lessen  competition or to tend  to create a monopoly  or
that  the  proposed acquisition  of  control would  in  any other  manner  be in
restraint of  trade,  and  that  the anticompetitive  effects  of  the  proposed
acquisition  of control are not 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; (iii) the financial condition of FBS is such as might
jeopardize the financial stability of the California Banks or First  Interstate,
or  prejudice the interest of the  depositors, creditors, or shareholders of the
California Banks or First Interstate; (iv)  plans or proposals to liquidate  the
California Banks or First Interstate, to sell the assets of the California Banks
or  First  Interstate, to  merge or  consolidate the  California Banks  or First
Interstate, or to  make any  other major  changes in  the business,  corporation
structure,  or management  of the California  Banks or First  Interstate are not
fair and  reasonable  to the  depositors,  creditors, and  shareholders  of  the
California  Banks  or  First  Interstate;  (v)  the  competence,  experience, or
integrity of  FBS  indicates  that it  would  not  be in  the  interest  of  the
depositors,  creditors,  or  shareholders  of  the  California  Banks  or  First
Interstate or  in the  interest  of the  public to  permit  FBS to  control  the
California  Banks or First Interstate; (vi)  the proposed acquisition is unfair,
unjust, or  inequitable  to the  California  Banks  or First  Interstate  or  to

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the  depositors, creditors,  or shareholders  of the  California Banks  or First
Interstate; or (vii) FBS neglects, fails, or refuses to furnish all  information
required  by the Superintendent. Further, under  Section 703.5 of the California
Financial Code, the Superintendent may find,  for purposes of Section 703,  that
(i)  the integrity  of FBS  indicates that it  would not  be in  the interest of
depositors,  creditors,  or  shareholders  of  the  California  Banks  or  First
Interstate  or  in the  interest  of the  public to  permit  FBS to  control the
California Banks or First Interstate  if FBS or any  director or officer of  FBS
has  been convicted of, or  has pleaded nolo contendere  to, any crime involving
fraud or dishonesty, and (ii) a plan to make a major change in the management of
the California  Banks or  First Interstate  is not  fair and  reasonable to  the
depositors,  creditors,  or  shareholders  of  the  California  Banks  or  First
Interstate if the plan provides for a  person who has been convicted of, or  has
pleaded  nolo contendere to, any crime involving fraud or dishonesty to become a
director or officer of the California Banks or First Interstate. With respect to
compliance with these requirements,  to the best knowledge  of FBS, none of  its
directors  or officers has been convicted of, or pleaded nolo contendere to, any
crime involving  fraud  or dishonesty.  The  Superintendent must  approve  FBS's
application  to acquire control of First  Interstate and the California Banks in
the absence of any  of the factors  in Section 703  of the California  Financial
Code.

    COLORADO  BANKING  BOARD.    Under Section  11-6.4-104(10)  of  the Colorado
Revised Statutes, FBS  may not acquire  First Interstate and  its Colorado  bank
subsidiaries,  First Interstate Bank  of Denver, National  Association and First
Interstate Bank of Englewood, National Association (the "Colorado Banks") unless
FBS obtains a  certificate from  the Colorado  Banking Board  certifying to  the
Federal  Reserve that the  acquisition complies with  Colorado law. In addition,
under Sections 11-6.4-103(2), (4) and (5) of the Colorado Revised Statutes,  FBS
may not acquire control of First Interstate and the Colorado Banks (i) if, after
the  acquisition,  FBS would  control  more than  25%  of the  aggregate  of all
federally insured deposits in banks and other financial institutions located  in
the State of Colorado, (ii) unless the Colorado Banks have been in operation for
at  least five years at the time of the acquisition, or (iii) unless immediately
before the acquisition, FBS has such  capital as the Colorado Banking Board  may
require   by  rule  or  regulation.  With   respect  to  compliance  with  these
requirements, each of  the Colorado Banks  has been in  operation for more  than
five  years  and,  after the  Merger,  FBS will  control  less than  25%  of the
aggregate  deposits  of  all  federally   insured  banks  and  other   financial
institutions located in the State of Colorado.

    IDAHO DIRECTOR OF THE DEPARTMENT OF FINANCE.  FBS may not acquire control of
First  Interstate  and  First  Interstate Bank  of  Idaho,  National Association
without the prior approval  of the Director of  the Department of Finance  under
Section   26-2606  of  the  Idaho  Code.  The  Director  must  disapprove  FBS's
application to acquire control of First Interstate and First Interstate Bank  of
Idaho,  National Association if  any of the following  conditions exist: (i) the
proposed transaction would be detrimental to the safety and soundness of FBS  or
First Interstate Bank of Idaho, National Association; (ii) FBS or its affiliates
do  not  have a  record of  sound  performance, efficient  management, financial
responsibility, and integrity;  (iii) the  financial condition of  FBS or  First
Interstate  Bank  of Idaho,  National Association  might  be jeopardized  or the
interests of depositors or  other customers of FBS  or First Interstate Bank  of
Idaho,  National Association might be prejudiced;  (iv) First Interstate Bank of
Idaho, National Association has been chartered and actively engaged in  business
for  less than five years; (v) the consummation of the proposed transaction will
tend substantially to lessen competition within  the State of Idaho, unless  the
Director  finds that the anticompetitive effects of the proposed transaction are
clearly outweighed by the  benefit of meeting the  convenience and needs of  the
community  to be served; or (vi) FBS has not established a record of meeting the
credit needs of the communities which it or any subsidiary financial institution
services. With respect to compliance  with these requirements, First  Interstate
Bank  of Idaho, National Association has  been chartered and actively engaged in
business for more than five years.

    MONTANA DEPARTMENT OF COMMERCE.  Under  Sections 32-1-383(1) and (3) of  the
Montana  Code, FBS may not acquire First Interstate and First Interstate Bank of
Montana, National Association (i) if, after the acquisition, FBS would  directly
or    indirectly    control    more    than    20%    of    all    deposits   in

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federally insured banks, savings associations, and credit unions located in  the
State  of  Montana or  (ii) unless  First Interstate  Bank of  Montana, National
Association has been conducting business for a continuous period of at least six
years prior to the effective date of the acquisition. In addition, under Section
32-1-383(4) of the Montana Code, assuming that it has not been preempted by  the
IBBE  Act, FBS  may not  acquire First Interstate  and First  Interstate Bank of
Montana, National  Association  if,  after the  acquisition,  all  bank  holding
companies  that do not have headquarters in Montana control more than 49% of all
deposits in  federally insured  banks and  savings associations  located in  the
State  of Montana. Finally, under Section 32-1-384 of the Montana Code, FBS must
submit a copy  of the  Federal Reserve Board  application to  the Department  of
Commerce,  together with  a statement  verifying that  the acquisition  will not
result in a violation of the limits described above. With respect to  compliance
with  these requirements, First Interstate Bank of Montana, National Association
has been conducting business for a continuous period of more than six years and,
after the Merger, FBS will  control less than 20%  of all deposits in  federally
insured  bank, savings associations,  and credit unions located  in the State of
Montana. In addition, assuming Section 32-1-383(4)  of the Montana Code has  not
been  preempted by  the IBBE Act,  all bank  holding companies that  do not have
headquarters in Montana will control less than 49% of all deposits in  federally
insured banks and savings associations located in the State of Montana.

    NEVADA  COMMISSIONER OF FINANCIAL INSTITUTIONS.  FBS may not acquire control
of First Interstate and  First Interstate Bank  of Nevada, National  Association
without  the prior approval of the Nevada Commissioner of Financial Institutions
under Section 666.305 of the Nevada  Revised Statutes. Under Section 666.315  of
the  Nevada Revised  Statutes, the Commissioner  must deny  FBS's application to
acquire control  of  First  Interstate  and First  Interstate  Bank  of  Nevada,
National  Association if  he finds: that  (i) the proposed  transaction would be
detrimental to the  safety and  soundness of FBS,  to First  Interstate Bank  of
Nevada,  National  Association,  or  to any  subsidiary  or  affiliate  of First
Interstate Bank  of  Nevada,  National  Association;  (ii)  FBS,  its  executive
officers,  directors, or principal shareholders have not established a record of
sound performance, efficient management, financial responsibility, and integrity
so that  it  would be  against  the  interest of  depositors,  other  customers,
creditors   or  shareholders  of  First  Interstate  Bank  of  Nevada,  National
Association, or  the public  to authorize  the proposed  transaction; (iii)  the
transaction is detrimental to the financial condition of FBS or First Interstate
Bank of Nevada, National Association or might jeopardize the financial stability
of  FBS or First  Interstate Bank of Nevada,  National Association, or prejudice
the interests of  depositors or  customers of FBS  or First  Interstate Bank  of
Nevada,  National  Association; (iv)  consummation  of the  proposed transaction
would tend to lessen banking competition substantially, unless the  Commissioner
finds  that the anticompetitive effects of  the proposed transaction are clearly
outweighed by the benefit of meeting  the convenience and needs of the  relevant
market  to be  served; or (v)  FBS has not  established a record  of meeting the
needs for  credit of  the  communities which  it  or any  subsidiary  depository
institution  serves. In reviewing FBS's  application, the Commissioner must also
consider FBS's  record of  compliance with  the Community  Reinvestment Act  and
whether  the proposed  transaction will meet  the needs of  those counties whose
populations are less than 100,000 and  whose residents are not being  adequately
served  by existing financial institutions. Finally, under Section 59(1) of 1995
Nev. Stat. Ch. 482 (effective September  28, 1995), FBS may not acquire  control
of First Interstate and First Interstate Bank of Nevada, National Association if
First  Interstate  Bank  of  Nevada, National  Association  was  chartered after
September 28,  1995  and, at  the  time of  the  acquisition, had  not  been  in
existence  for  at  least five  years.  With  respect to  compliance  with these
requirements,  First  Interstate  Bank  of  Nevada,  National  Association   was
chartered before September 28, 1995.

    NEW MEXICO DIRECTOR OF THE FINANCIAL INSTITUTIONS DIVISION OF THE REGULATION
AND LICENSING DEPARTMENT.  Under Section 58-26-5 of the New Mexico Statutes, FBS
must  provide  at least  90-days prior  written  notice to  the Director  of the
Financial Institutions Division  of the Regulation  and Licensing Department  of
its  intent to acquire First Interstate and First Interstate Bank of New Mexico,
National Association. Under Section 58-26-4(C)  of the New Mexico Statutes,  FBS
may  not acquire control  of First Interstate  and First Interstate  Bank of New
Mexico, National Association if

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the  acquisition will result in undue  concentration of deposits totaling 40% or
more of the total deposits in all banks, savings institutions, and credit unions
in the State of New Mexico. With respect to compliance with these  requirements,
after  the Merger, FBS will control less than  40% or more of the total deposits
in all  banks, savings  institutions, and  credit  unions in  the State  of  New
Mexico.

    OREGON LAW.  Under Section 715.065(1)(a) of the Oregon Revised Statutes, FBS
may not acquire control of First Interstate and First Interstate Bank of Oregon,
National   Association  unless   First  Interstate  Bank   of  Oregon,  National
Association has  been engaged  in the  business of  banking for  at least  three
years. With respect to compliance with these requirements, First Interstate Bank
of  Oregon, National Association has been engaged in the business of banking for
more than three years.

    TEXAS BANKING COMMISSIONER.  Under Section  8.301 of the Texas Banking  Act,
FBS  must submit a  copy of its  Federal Reserve Board  application to the Texas
Banking Commissioner when  it is  submitted to  the Federal  Reserve Board.  The
Banking  Commissioner must then state in writing  to the Federal Reserve (i) his
views and  recommendations  concerning  the application  and  (ii)  his  opinion
regarding  whether  the  application  evidences  compliance  with  the Community
Reinvestment Act,  except  that the  Banking  Commissioner is  not  required  to
disapprove  the application solely  because of the  latter opinion. In addition,
under Sections 8.302 and  8.303 of the  Texas Banking Act,  FBS may not  acquire
control  of  First  Interstate  and First  Interstate  Bank  of  Texas, National
Association (i) if, after  the acquisition, FBS would  control more than 20%  of
the  total amount of deposits of  insured depository institutions located in the
State of Texas or (ii) First Interstate Bank of Texas, National Association  has
not  existed and continuously operated  as a bank for  at least five years. With
respect to compliance with these  requirements, First Interstate Bank of  Texas,
National  Association has  existed and continously  operated as a  bank for more
than five years and,  after the Merger,  FBS will control less  than 20% of  the
total amount of deposits of insured depository institutions located in the State
of Texas.

   
    UTAH   LAW   COMMISSIONER  OF   FINANCIAL   INSTITUTIONS.     Under  Section
7-1-703(7)(a)(i) of  the  Utah  Code,  FBS may  not  acquire  control  of  First
Interstate  and First Interstate Bank of Utah, National Association unless First
Interstate Bank of Utah, National Association has been in existence for at least
five years. With respect to  compliance with this requirement, First  Interstate
Bank  of Utah,  National Association  has been in  existence for  more than five
years.
    

    WASHINGTON LAW.   Under Section  30.04.232(1)(a) of  the Washington  Revised
Code,  FBS may not acquire control of First Interstate and First Interstate Bank
of Washington, National Association unless First Interstate Bank of  Washington,
National  Association  has been  in  existence for  at  least three  years. With
respect  to  compliance  with  this   requirement,  First  Interstate  Bank   of
Washington,  National  Association has  been in  existence  for more  than three
years.

    WYOMING COMMISSIONER  OF BANKING.   FBS  may not  acquire control  of  First
Interstate  and First Interstate  Bank of Wyoming,  National Association without
the prior approval of the Wyoming Commissioner of Banking under Section 13-9-303
of the  Wyoming Statutes.  The Commissioner  must approve  FBS's application  to
acquire  First  Interstate  and  First  Interstate  Bank  of  Wyoming,  National
Association unless he finds that: (i) there is or recently has been evidence  of
criminal  activity on the part of FBS or  any of its officers or directors; (ii)
the acquisition  would jeopardize  the  integrity of  First Interstate  Bank  of
Wyoming, National Association; or (iii) FBS has not responsibly met the service,
credit, and financing needs within the communities it serves. In addition, under
Section  13-9-303(c) of  the Wyoming  Statutes, FBS  may not  acquire control of
First Interstate  and First  Interstate Bank  of Wyoming,  National  Association
unless  First  Interstate  Bank of  Wyoming,  National Association  has  been in
existence for  at  least three  years.  With  respect to  compliance  with  this
requirement,  First Interstate Bank of Wyoming, National Association has been in
existence for more than three years.

   
    MINISTER OF FINANCE OF CANADA.  The Merger is subject to the prior  approval
of  the Minister of Finance of Canada  (the "Minister") under Section 377 of the
Bank Act of Canada (the "Bank Act").  Under Section 390(1) of the Bank Act,  the
Minister  is required, in  approving a transaction  such as the  Merger, to take
into  account  all  matters  that   the  Minister  considers  relevant  to   the
application.
    

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Without  limiting  the  generality  of the  foregoing,  the  Minister  must have
particular regard to (i) the nature  and sufficiency of the financial  resources
of  FBS as a source of continuing financial support for First Interstate Bank of
Canada ("First Interstate Canada"),  (ii) the soundness  and feasibility of  the
plans  of FBS for  the future conduct  and development of  the business of First
Interstate Canada, (iii) the business record and experience of FBS, (iv) whether
First Interstate Canada will be operated  responsibly by persons who are fit  as
to  the character,  competence, and experience  suitable for  involvement in the
operation of  a financial  institution, (v)  the size  of (A)  First  Interstate
Canada  and (B) the deposit-taking affiliates of FBS calculated on such basis as
the Minister considers appropriate, and (vi) the best interests of the financial
system in Canada. Further,  under Section 390(2) of  the Bank Act, the  Minister
may  not approve the Merger  unless the Minister is  satisfied that treatment as
favorable for banks to which the Bank Act applies exists or will be provided  in
the United States.
    

   
    CURRENT  STATUS OF REGULATORY APPROVALS.   FBS's final Federal Reserve Board
application was filed with the Federal  Reserve Bank of Minneapolis on  November
10,  1995 and has been accepted as  informationally complete. FBS has also filed
all other notices  and/or applications  required to obtain  the other  Requisite
Regulatory  Approvals (other than the Canadian approvals). Although there can be
no assurances,  neither FBS  nor First  Interstate believes  that there  is  any
reason  that such Approvals will  not be received on a  timely basis or that any
Burdensome Conditions will be imposed.
    

TERMINATION OF THE MERGER AGREEMENT

    The Merger Agreement  may be  terminated by  mutual agreement  of the  First
Interstate  Board and the FBS Board. The Merger Agreement may also be terminated
by either  the  First  Interstate  Board  or the  FBS  Board:  (a)  if  (i)  any
governmental  entity which must grant a Requisite Regulatory Approval has denied
approval of the Merger or has issued an order enjoining or otherwise prohibiting
the consummation of the  transactions contemplated by  the Merger Agreement  and
such  denial or  order shall  have become  final and  nonappealable; (b)  if the
Merger shall not have been consummated  on or before December 31, 1996  (subject
to  extension to June 30, 1997  under certain circumstances), unless the failure
of the Effective Time to occur by such  date shall be due to the failure of  the
party  seeking  to terminate  the  Merger Agreement  to  perform or  observe the
covenants and agreements of such party set forth therein; (c) provided that  the
terminating party is not then in material breach of the Merger Agreement, if the
other  party shall have breached any of the covenants or agreements made by such
other party  or any  of the  representations or  warranties made  by such  other
party,  and in either  case, such breach  is not cured  within 30 days following
written notice to the breaching party, or which breach cannot be cured prior  to
the  Effective Time and would entitle  the non-breaching party not to consummate
the transactions contemplated by  the Merger Agreement; (d)  if any approval  of
the shareholders of FBS or First Interstate contemplated by the Merger Agreement
shall  not have been  obtained by reason  of the failure  to obtain the required
vote at the relevant Special  Meeting; (e) prior to  the approval of the  Merger
Agreement  by the  requisite vote of  First Interstate's  shareholders (if First
Interstate is the  terminating party) or  the FBS  Vote Matters (if  FBS is  the
terminating  party), if there exists  at such time an  outstanding proposal by a
third party to  merge with or  acquire a  substantial equity interest  in, or  a
substantial  portion of  the assets  of the terminating  party and  the Board of
Directors of the terminating  party, after having  consulted with outside  legal
counsel, reasonably determines in good faith that acceptance of such proposal is
necessary  in  the exercise  of its  fiduciary duties;  or (f)  if the  Board of
Directors of the  other party  shall have withdrawn,  modified or  changed in  a
manner  adverse to the  terminating party its approval  or recommendation of the
Merger Agreement and the transactions contemplated thereby (in the case of First
Interstate) or the FBS Vote Matters (in the case of FBS).

TERMINATION FEES

    In order  to  induce  FBS  to  enter  into  the  Merger  Agreement,  and  in
consideration of FBS's undertaking of efforts in furtherance of the transactions
contemplated  by the Merger  Agreement, First Interstate  entered into the First
Interstate Fee Agreement with  FBS and, in order  to induce First Interstate  to
enter  into the  Merger Agreement,  and in  consideration of  First Interstate's
undertaking of efforts in  furtherance of the  transactions contemplated by  the
Merger Agreement,

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FBS  entered into  the FBS  Fee Agreement  with First  Interstate. The following
description of the Fee Agreements is  qualified in its entirety by reference  to
the  FBS Fee Agreement and  the First Interstate Fee  Agreement, copies of which
are set  forth  as  Appendices D  and  E  hereto, respectively,  and  which  are
incorporated herein by reference.

    For  purposes of the following  summary of the Fee  Agreements, the term (i)
"Payor" means  First  Interstate  with  respect  to  the  First  Interstate  Fee
Agreement  and FBS with  respect to the  FBS Fee Agreement  and (ii) "Recipient"
means FBS  with  respect  to  the  First  Interstate  Fee  Agreement  and  First
Interstate with respect to the FBS Fee Agreement.

    Pursuant  to  the  respective  Fee  Agreements,  Payor  shall  pay Recipient
termination fees if the Merger Agreement is terminated in certain events. A cash
fee of $25 million (the "First Trigger Fee") would generally become payable  if,
prior  to a "Nullifying Event" (as hereinafter defined), the Merger Agreement is
terminated after or concurrently with the occurrence of a "First Trigger  Event"
(as  hereinafter defined).  In addition,  a fee  of $75  million would generally
become payable if,  prior to  a Nullifying Event,  (i) the  Merger Agreement  is
terminated,  (ii) prior to or concurrently with such termination a First Trigger
Event shall have  occurred and (iii)  prior to, concurrently  with or within  18
months  after such termination  an "Acquisition Event"  (as hereinafter defined)
shall have occurred.

    The Fee  Agreements  define the  term  "First  Trigger Event"  to  mean  the
occurrence of any of the following events:

        (i) Payor's Board of Directors shall have failed to approve or recommend
    that  the shareholders of Payor vote in  favor of the matters to be approved
    by such shareholders in connection with the Merger Agreement, or shall  have
    withdrawn  or  modified in  a manner  adverse to  Recipient its  approval or
    recommendation of such matters, or shall have resolved or publicly announced
    an intention to do either of the foregoing;

        (ii) Payor, or its Board of  Directors, shall have recommended that  the
    shareholders  of Payor  approve any  "Acquisition Proposal"  (as hereinafter
    defined)  or  shall  have  entered  into  an  agreement  with  respect   to,
    authorized,  approved, proposed or publicly announced its intention to enter
    into, any Acquisition Proposal;

       (iii) the matters to  be voted on by  Payor's shareholders in  connection
    with  the  Merger shall  not  have been  approved  at a  meeting  of Payor's
    shareholders which has been  held for that purpose  prior to termination  of
    the Merger Agreement in accordance with its terms, if prior thereto it shall
    have  been  publicly announced  that  any third  party  shall have  made, or
    disclosed an intention to make, an Acquisition Proposal;

       (iv) a third party shall have acquired beneficial ownership or the  right
    to  acquire  beneficial ownership  of 50%  or more  of the  then outstanding
    shares of  the stock  then entitled  to vote  generally in  the election  of
    directors of Payor; or

        (v)  following the making of an Acquisition Proposal with respect to it,
    Payor shall have breached any covenant or agreement contained in the  Merger
    Agreement  such that  Recipient would  be entitled  to terminate  the Merger
    Agreement (without regard to any grace period provided for therein),  unless
    such  breach  is promptly  cured  without jeopardizing  consummation  of the
    Merger.

    The Fee  Agreements  define the  term  "Acquisition Proposal"  to  mean  the
occurrence  of any (i) publicly  announced proposal, (ii) regulatory application
or notice, (iii) agreement or understanding, (iv) disclosure of an intention  to
make  a proposal or (v) amendment  to any of the foregoing,  made or filed on or
after November  5, 1995,  in each  case with  respect to  any of  the  following
transactions  with a third party: (A) a  merger or consolidation, or any similar
transaction, involving Payor  or any  of its subsidiaries  (other than  mergers,
consolidations or similar transactions involving solely Payor and/or one or more
of  its subsidiaries and  other than a  merger or consolidation  as to which the
common shareholders of Payor immediately prior  thereto in the aggregate own  at
least 70% of the common

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<PAGE>
stock  of the publicly held surviving  or successor corporation (or any publicly
held or  ultimate parent  company  thereof) immediately  following  consummation
thereof); (B) a purchase, lease or other acquisition of all or substantially all
of the assets or deposits of Payor or any of its subsidiaries; or (C) a purchase
or  other acquisition (including by way of merger, consolidation, share exchange
or otherwise) of  securities representing  20% or more  of the  voting power  of
Payor. The Fee Agreements define "Acquisition Event" to mean the consummation of
any Acquisition Proposal; PROVIDED, that the percentage referenced in clause (C)
above shall be 50% instead of 20%.

    For purposes of the First Interstate Fee Agreement, various actions taken by
Wells  in connection with the Wells Offer constitute an Acquisition Proposal. In
addition, if Wells acquires  more than 50% of  the outstanding First  Interstate
Common Stock pursuant to the Wells Offer or otherwise, an Acquisition Event will
occur for purposes of the First Interstate Fee Agreement.

   
    The  Fee Agreements define  the term "Nullifying  Event" to mean  any of the
following events  occurring  and continuing  at  a time  when  Payor is  not  in
material  breach of any of  its covenants or agreements  contained in the Merger
Agreement: (i) Recipient  is in  breach of any  of its  covenants or  agreements
contained  in the Merger Agreement such that  Payor is entitled to terminate the
Merger Agreement (without regard to any grace period provided for therein), (ii)
the shareholders of Recipient shall have voted and failed to approve the matters
to be voted  on at the  Recipient's Special  Meeting (unless the  matters to  be
voted  on  at the  Payor's Special  Meeting shall  not have  been approved  at a
meeting of Payor shareholders which was held on or prior to such date) or  (iii)
the  Board of Directors of  Recipient shall have failed  to approve or recommend
the matters to  be voted on  at the  Recipient's Special Meeting  or shall  have
withdrawn,  modified or changed in  any manner adverse to  Payor its approval or
recommendation of the matters to be voted on at the Recipient's Special  Meeting
or  shall have  resolved or publicly  announced its  intention to do  any of the
foregoing.
    

STOCK OPTION AGREEMENTS

    As a further inducement and condition to FBS's willingness to enter into the
Merger Agreement,  First  Interstate entered  into  the First  Interstate  Stock
Option Agreement with FBS, and also as further inducement and condition to First
Interstate's  willingness to enter  into the Merger  Agreement, FBS entered into
the FBS Stock Option Agreement with First Interstate. The following  description
of  the Stock Option Agreements is qualified in its entirety by reference to the
text of such  Agreements copies of  which are set  forth as Appendices  B and  C
hereto, respectively, and which are incorporated herein by reference.

    For  purposes of  the following summary,  the term (i)  "Issuer" means First
Interstate with respect to the First  Interstate Stock Option Agreement and  FBS
with respect to the FBS Stock Option Agreement and (ii) "Grantee" means FBS with
respect to the First Interstate Stock Option Agreement and First Interstate with
respect to the FBS Stock Option Agreement.

   
    Pursuant  to the First  Interstate Stock Option  Agreement, First Interstate
granted FBS an option  (the "First Interstate Option")  to purchase a number  of
shares  of First  Interstate Common  Stock approximately  equal to  19.9% of the
number of shares of First Interstate Common Stock outstanding immediately before
exercise of  the  First Interstate  Option.  The  exercise price  of  the  First
Interstate  Option is $127.75 per share (the closing market price on the trading
day preceding the  execution of  the First Interstate  Stock Option  Agreement),
subject  to adjustment under specified circumstances (such exercise price, as so
adjusted, being  referred to  herein as  the "First  Interstate Option  Price").
Pursuant  to the  FBS Stock  Option Agreement,  FBS granted  First Interstate an
option (the  "FBS Option"and,  together with  the First  Interstate Option,  the
"Options")  to purchase  a number  of shares  of FBS  Common Stock approximately
equal to  19.9%  of  the  number  of shares  of  FBS  Common  Stock  outstanding
immediately  before exercise of  the FBS Option.  The exercise price  of the FBS
Option is  $50.875  per share  (the  closing market  price  on the  trading  day
preceding  the  execution  of  the  FBS  Stock  Option  Agreement),  subject  to
adjustment under specified circumstances (such  exercise price, as so  adjusted,
being referred to herein as the "FBS Option Price").
    

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<PAGE>
   
    Each  of the Options will become exercisable in  whole or in part if both an
"Initial Triggering  Event"  and  a "Subsequent  Triggering  Event"  occur  with
respect  to  the Issuer  prior  to the  occurrence  of an  "Exercise Termination
Event," as such terms  are defined below.  The purchase of  any shares of  First
Interstate  Common Stock or FBS Common Stock pursuant to an Option is subject to
compliance with applicable  law, including  the receipt  of necessary  approvals
under the BHC Act. If the Grantee of either Option were to exercise its right to
acquire  the full 19.9 percent of the  outstanding shares of the Issuer's common
stock subject to such  Grantee's Option, such  Grantee would hold  approximately
16.6  percent of the outstanding shares of the Issuer's common stock immediately
after such exercise.
    

    The Stock Option Agreements  define the term  "Initial Triggering Event"  to
mean any of the following events or transactions:

        (i)  Issuer or any of its  subsidiaries, without Grantee's prior written
    consent, enters into an agreement to engage in an "Acquisition  Transaction"
    (as  hereinafter defined) with  a third party  or the Board  of Directors of
    Issuer recommends  that the  shareholders of  Issuer approve  or accept  any
    Acquisition Transaction, other than as contemplated by the Merger Agreement;

        (ii) A third party shall have acquired beneficial ownership or the right
    to  acquire beneficial ownership of 10% or more of the outstanding shares of
    Issuer common stock;

       (iii) The shareholders of Issuer shall  have voted and failed to  approve
    the  matters to be voted on at  the Issuer's Special Meeting or such meeting
    has not been held or  has been canceled prior  to termination of the  Merger
    Agreement  if, prior  to such  Special Meeting  (or if  such Special Meeting
    shall not have been held or shall have been canceled, such termination),  it
    shall  have been publicly announced that any third party shall have made, or
    disclosed an  intention to  make, a  proposal to  engage in  an  Acquisition
    Transaction with respect to the Issuer;

       (iv)  Issuer's  Board of  Directors  withdraws or  modifies  (or publicly
    announces its intention to withdraw  or modify) its recommendation that  the
    shareholders  of Issuer approve the  matters to be voted  on at the Issuer's
    Special  Meeting,  or  Issuer,  without  Grantee's  prior  written  consent,
    authorizes,  recommends or proposes (or  publicly announces its intention to
    authorize, recommend or propose)  an agreement to  engage in an  Acquisition
    Transaction with a third party;

        (v)  A third  party makes  a proposal to  Issuer or  its shareholders to
    engage in an  Acquisition Transaction  and such proposal  has been  publicly
    announced;

       (vi)  A third party  shall have filed with  the Commission a registration
    statement with respect to a  potential exchange offer that would  constitute
    an  Acquisition Transaction (or filed a preliminary proxy statement with the
    Commission with respect to a potential  vote by its shareholders to  approve
    the issuance of shares to be offered in such an exchange offer);

       (vii)  Issuer willfully breaches any  covenant or obligation contained in
    the  Merger  Agreement  in  anticipation  of  engaging  in  an   Acquisition
    Transaction,  and  following  such  breach  Grantee  would  be  entitled  to
    terminate the Merger Agreement (whether  immediately or after the giving  of
    notice or passage of time or both); or

      (viii)  A  third party  files 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.

    As used in the Stock  Option Agreements, the term "Acquisition  Transaction"
means (a) a merger or consolidation or any similar transaction, involving Issuer
or  any  "Significant Subsidiary"  (as defined  in Rule  1-02 of  Regulation S-X
promulgated by the Commission) of Issuer (other than mergers, consolidations  or
similar  transactions  involving  solely  Issuer  and/or  one  or  more  of  its
subsidiaries and other  than a merger  or consolidation as  to which the  common
shareholders  of Issuer immediately prior thereto  in the aggregate own at least
70% of the common stock of the publicly held surviving or successor  corporation
immediately  following  consummation thereof),  (b) a  purchase, lease  or other
acquisition of all or substantially all of  the assets or deposits of Issuer  or
any of its

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<PAGE>
subsidiaries  or  (c)  a purchase  or  other acquisition  (including  by merger,
consolidation, share exchange  or otherwise) of  securities representing 10%  or
more of the voting power of Issuer or any of its subsidiaries.

    The Stock Option Agreements define the term "Subsequent Triggering Event" to
mean any of the following events or transactions: (i) The acquisition by a third
party  of beneficial  ownership of  20% or more  of the  then outstanding common
stock of  Issuer or  (ii) Issuer  or  any of  its subsidiaries,  without  having
received  the  prior written  consent of  Grantee, enters  into an  agreement to
engage in  an  Acquisition  Transaction with  a  third  party or  the  Board  of
Directors of Issuer recommends that the shareholders of Issuer approve or accept
any Acquisition Transaction, other than as contemplated by the Merger Agreement;
provided,  that for purposes of the definition of "Subsequent Triggering Event,"
the percentage  referred to  in clause  (c) of  the definition  of  "Acquisition
Transaction" above shall be 20% rather than 10%.

   
    The  Stock Option Agreements define the term "Exercise Termination Event" to
mean any of (i) the Effective Time; (ii) termination of the Merger Agreement  in
accordance with its terms, if such termination occurs prior to the occurrence of
an  Initial  Triggering  Event;  (iii)  the passage  of  18  months,  subject to
extension in  order to  obtain  required regulatory  approvals, to  comply  with
applicable  regulatory waiting periods or to avoid liability under Section 16(b)
of the  Exchange  Act,  after  termination  of  the  Merger  Agreement  if  such
termination  is  concurrent  with  or  follows  the  occurrence  of  an  Initial
Triggering Event; (iv) the date on which the shareholders of Grantee shall  have
voted  and failed to approve the matters to be voted on at the Grantee's Special
Meeting (unless (A) Issuer shall then be in material breach of its covenants  or
agreements  contained in the Merger  Agreement or (B) on  or prior to such date,
the shareholders of Issuer shall have also voted and failed to approve and adopt
the matters to be voted on at the Issuer's Special Meeting); or (v) the date  on
which  the  reciprocal Option  granted by  Grantee to  Issuer shall  have become
exercisable in  accordance  with  its terms.  Notwithstanding  anything  to  the
contrary contained in the Stock Option Agreements, neither of the Options may be
exercised  at any time  when the Grantee thereunder  is in breach  of any of its
covenants or agreements contained in the  Merger Agreement such that the  Issuer
thereof  shall be entitled (without regard to any grace period provided therein)
to terminate the Merger Agreement pursuant to the terms thereof, and each of the
Stock Option Agreements  shall automatically terminate  upon the termination  of
the  Merger Agreement by the Issuer pursuant to the terms thereof as a result of
a breach by the Grantee of its covenants or agreements contained therein.
    

    If an Option becomes exercisable,  it may be exercised  in whole or in  part
within  6 months following the applicable Subsequent Triggering Event. Grantee's
right to exercise  the Option and  certain other rights  under the Stock  Option
Agreements  are subject to  an extension in order  to obtain required regulatory
approvals and comply  with applicable  regulatory waiting periods  and to  avoid
liability  under Section  16(b) of  the Exchange Act.  The Option  Price and the
number of shares  issuable under  the Option are  subject to  adjustment in  the
event of specified changes in the capital stock of Issuer.

    Upon the occurrence of a Subsequent Triggering Event that occurs prior to an
Exercise  Termination Event, Grantee will have  the right for 12 months (subject
to extension as described in the related  Stock Option Agreement), on up to  two
occasions,  to require the Issuer to register  the shares of Issuer common stock
issued or issuable pursuant to the  Option under the Securities Act, subject  to
specified conditions and limitations.

   
    Each  Stock  Option  Agreement also  provides  that  at any  time  after the
occurrence of  a  "Repurchase Event"  (as  hereinafter defined),  upon  request,
Issuer  shall be obligated to  repurchase the Option and all  or any part of the
shares ("Option  Shares") received  upon the  full or  partial exercise  of  the
Option  from the  holder thereof. Such  repurchase of  the Option shall  be at a
price equal to  the amount  by which  the "Market/Offer  Price" (as  hereinafter
defined)  exceeds the  Option Price (as  adjusted), multiplied by  the number of
Option Shares for which the Option may then be exercised. A repurchase of Option
Shares shall be at  a price equal  to the Market/Offer  Price multiplied by  the
    

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<PAGE>
number of Option Shares to be repurchased. The term Market/Offer Price means the
highest  of (i) the price per share at which a tender or exchange offer has been
made for Issuer common stock,  (ii) the price per  share of Issuer common  stock
that  any third party is to pay pursuant  to an agreement with Issuer, (iii) the
highest closing price  per share  of Issuer  common stock  within the  six-month
period  immediately preceding  the date  that notice  to repurchase  is given or
(iv), in the event of a sale of  all or substantially all of Issuer's assets  or
deposits,  the sum of the price paid for such assets or deposits and the current
market value of the remaining assets  (as determined by a nationally  recognized
investment banking firm), divided by the number of shares of Issuer common stock
outstanding  at the time of such sale. The term "Repurchase Event" is defined to
mean (i) the acquisition by  any third party of  beneficial ownership of 50%  or
more  of the outstanding shares of Issuer  common stock or (ii) the consummation
of an Acquisition Transaction; provided, that for purposes of the definition  of
"Repurchase  Event," the percentage referred to  in clause (c) of the definition
of "Acquisition Transaction" above shall be 50% rather than 10%.

    Pursuant to the terms of the relevant Stock Option Agreements, in the  event
that,  prior  to  an  Exercise Termination  Event,  Issuer  enters  into certain
transactions  in  which  Issuer  is  not  the  surviving  corporation,   certain
fundamental  changes in the capital stock of Issuer occur or Issuer sells all or
substantially all of  its or  certain of  its subsidiaries'  assets, the  Option
shall  be converted  into a  substitute option  (the "Substitute  Option"), with
terms similar to those of  the Option, to purchase  capital stock of the  entity
that is the effective successor to Issuer.

    Pursuant  to the  terms of the  relevant Stock Option  Agreement, the "Total
Profit" (as hereinafter  defined) that Grantee  can realize with  regard to  the
Option  may not exceed $100 million. If Grantee's Total Profit would exceed such
amount, Grantee  would be  required, at  its sole  election, to  (a) reduce  the
number  of Option Shares subject to the Option, (b) deliver Option Shares to the
Issuer for cancellation, (c) pay  cash to Issuer or  (d) any combination of  the
foregoing  so that Grantee's actual realized  Total Profit shall not exceed $100
million. "Total Profit" is defined to  mean the aggregate (before taxes) of  (i)
any  amount  received pursuant  to  Issuer's repurchase  of  the Option  (or any
portion thereof), (ii) any  amount received pursuant  to Issuer's repurchase  of
the  Option Shares (less the  purchase price for such  Option Shares), (iii) any
net cash received pursuant to the sale of Option Shares to any third party (less
the purchase price of such Option Shares), (iv) any amounts received on transfer
of the Option or  any portion thereof  to a third party  and (v) any  equivalent
amounts received with respect to the Substitute Option. In addition, Grantee may
not  exercise the Option for a number of  Option Shares as would, as of the date
of such exercise, result in Grantee (if it were immediately to sell such  Option
Shares, together with all other Option Shares held by Grantee and its affiliates
as  of  such date,  at the  closing market  price on  the previous  trading day)
realizing a net gain in excess of $100 million.

    The Stock  Option Agreements  provide that  neither Grantee  nor Issuer  may
assign  any of its rights or  obligations thereunder without the written consent
of the other party, except that if a Subsequent Triggering Event occurs prior to
an Exercise Termination Event, Grantee may, subject to limitations contained  in
the   relevant  Stock  Option  Agreement,  assign  its  rights  and  obligations
thereunder in  whole or  in  part within  12  months following  such  Subsequent
Triggering  Event (subject to  extension as described  the relevant Stock Option
Agreement).

   
    Arrangements such as the Fee Agreements and the Stock Option Agreements  are
entered  into in connection with corporate mergers and acquisitions in an effort
to increase  the  likelihood  that  the  transactions  will  be  consummated  in
accordance  with  their terms,  and to  compensate the  grantee for  the efforts
undertaken and the  expenses, losses  and opportunity  costs incurred  by it  in
connection  with  the transactions  if they  are  not consummated  under certain
circumstances involving an acquisition or potential acquisition of the issuer by
a third party. The Fee Agreements  and the Stock Option Agreements were  entered
into  to accomplish these objectives,  and not because of  the proposals made by
Wells to acquire  First Interstate,  although FBS's  desire to  enter into  such
arrangements  was enhanced as a result thereof. The Fee Agreements and the Stock
Option Agreements may have the effect of discouraging offers by third parties to
acquire First Interstate or FBS prior to the Merger,
    

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<PAGE>
   
even if, in the case of First Interstate, such persons were prepared to offer to
pay consideration to First Interstate's shareholders which has a higher  current
market price than the shares of New First Interstate Common Stock to be received
by such holders pursuant to the Merger Agreement.
    

   
    For purposes of the First Interstate Stock Option Agreement, various actions
taken  by Wells in connection  with the Wells Offer  subsequent to the execution
and delivery of the First Interstate Stock Option Agreement have resulted in the
occurrence of an Initial Triggering Event.  In addition, if Wells acquires  more
than  20% of the outstanding First Interstate Common Stock pursuant to the Wells
Offer or  otherwise, or  if the  First Interstate  Board recommends  that  First
Interstate  shareholders accept the  Wells Offer, a  Subsequent Triggering Event
will occur for  purposes of  the First  Interstate Stock  Option Agreement  and,
subject  to the  conditions described  above, the  First Interstate  will become
exercisable. In such event, FBS will have the right to exercise such Option  for
up  to 19.9 percent of the outstanding  shares of First Interstate Common Stock.
To the best knowledge of First Interstate  and FBS, no event giving rise to  the
right  to exercise  either of the  Options has occurred  as of the  date of this
Joint Proxy Statement/Prospectus. Certain persons have filed lawsuits seeking to
challenge the validity of the First Interstate Stock Option Agreement. See  "The
Merger -- Certain Litigation."
    

AMENDMENTS TO RIGHTS AGREEMENTS

    In  connection with the execution of  the Merger Agreement, First Interstate
amended the  First  Interstate  Rights Agreement  (as  hereinafter  defined)  to
provide,  among other things, that  (i) the execution and  delivery of the First
Interstate Stock Option Agreement and any acquisition of Option Shares upon  the
exercise  thereof and (ii) the acquisition by FBS of up to 5% of the outstanding
shares of First  Interstate Common  Stock will  not cause  the First  Interstate
Rights   (as  hereinafter  defined)  to  become  exercisable.  In  addition,  in
connection with  the execution  of the  Merger Agreement,  FBS amended  the  FBS
Rights  Agreement to  provide, among  other things,  that (i)  the execution and
delivery of the FBS Stock Option Agreement and any acquisition of Option  Shares
by  First Interstate (and certain related persons) upon the exercise thereof and
(ii) the acquisition by First Interstate of  up to 5% of the outstanding  shares
of  FBS Common Stock, will  not cause the FBS  Rights to become exercisable. See
also "Description of FBS and New First Interstate Capital Stock" and "-- Certain
Differences in  Rights  of  Shareholders  of  First  Interstate  and  New  First
Interstate."

ACCOUNTING TREATMENT

    It  is expected that the "pooling-of-interests" method of accounting will be
used to reflect the Merger, and it is a condition to consummation of the  Merger
that  First Interstate and FBS receive letters,  dated as of the Effective Time,
from their independent auditors to the effect that the Merger qualifies for such
accounting treatment.  See "--  Conditions to  Consummation of  the Merger."  As
required by generally accepted accounting principles, under
"pooling-of-interests"  accounting,  as of  the Effective  Time, the  assets and
liabilities of First Interstate would be added to those of FBS at their recorded
book values and the  shareholders' equity accounts of  FBS and First  Interstate
would  be combined  on New First  Interstate's consolidated balance  sheet. On a
"pooling-of-interests" accounting basis, income  and other financial  statements
of  New  First  Interstate issued  after  consummation  of the  Merger  would be
restated retroactively to reflect  the consolidated combined financial  position
and results of operations of FBS and First Interstate as if the Merger had taken
place  prior to the periods  covered by such financial  statements. In order for
the Merger to qualify for pooling-of-interests accounting treatment, among other
criteria, substantially all (90%  or more) of  the outstanding First  Interstate
Common  Stock  must be  exchanged  for New  First  Interstate Common  Stock. The
unaudited  pro  forma  financial  information  contained  in  this  Joint  Proxy
Statement/Prospectus has been prepared using the pooling-of-interests accounting
method  to account  for the Merger.  See "Selected Historical  and Unaudited Pro
Forma Financial Data."

                                       82
<PAGE>
NO APPRAISAL RIGHTS

    Under the DGCL, holders of  First Interstate Common Stock, First  Interstate
Preferred  Stock (including the holders  of First Interstate Depositary Shares),
FBS Common Stock, and FBS 1991A Preferred Stock will have no appraisal rights in
connection with the Merger  Agreement and the  consummation of the  transactions
contemplated thereby.

EXTENSION, WAIVER AND AMENDMENT OF THE MERGER AGREEMENT

    At any time prior to the Effective Time, First Interstate and FBS, by action
taken  or authorized by their respective Boards 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, (ii) waive any inaccuracies in
the representations and warranties contained  in the Merger Agreement and  (iii)
waive  compliance  with any  of the  agreements or  conditions contained  in the
Merger  Agreement.  Subject  to  compliance  with  applicable  law,  the  Merger
Agreement may be amended at any time by an agreement among the parties, approved
or  authorized by  their respective boards  of directors; except  that after any
approval of  the  transactions  contemplated  by the  Merger  Agreement  by  the
shareholders  of First Interstate, there may not be, without further approval of
such shareholders, any amendment to the Merger Agreement that reduces the amount
or changes the form of the consideration to be delivered to the First Interstate
shareholders thereunder.

MANAGEMENT AND OPERATIONS OF NEW FIRST INTERSTATE FOLLOWING THE MERGER

BOARD OF DIRECTORS

    At the Effective Time, the Board  of Directors of New First Interstate  will
consist  of  20 persons  (unless otherwise  agreed  to in  writing prior  to the
Effective Time), 10 of whom shall be FBS Directors and 10 of whom shall be First
Interstate Directors. The  Merger Agreement  provides that  after the  Effective
Time,  the  New  First Interstate  Board  shall  consist of  an  even  number of
directors, and for a period of three years following the Effective Time, to  the
extent  practicable, each  class of directors  of New First  Interstate and each
committee of the New First Interstate Board will contain an equal number of  FBS
Directors  and First Interstate Directors. See " -- Interests of Certain Persons
in the Merger."

MANAGEMENT

    The executive officers of New First Interstate will be comprised of  certain
members  of FBS's  senior management and  certain members  of First Interstate's
senior management. The Merger  Agreement provides that  John F. Grundhofer,  the
Chairman of the Board, President and Chief Executive Officer of FBS, will be the
Chairman  of  the Board  and  Chief Executive  Officer  of New  First Interstate
following the Merger, and  William E. B.  Siart, the Chairman  of the Board  and
Chief  Executive Officer  of First Interstate,  will be the  President and Chief
Operating Officer of New First Interstate following the Merger. In addition, the
following persons are expected to have the responsibilities set forth below with
New First Interstate after the Merger:

<TABLE>
<CAPTION>
                                        PRESENT COMPANY
               NAME                       AFFILIATION                          RESPONSIBILITY
- -----------------------------------  ---------------------  -----------------------------------------------------
<S>                                  <C>                    <C>
Richard A. Zona                      FBS                    Vice Chairman and Chief Financial Officer
Bruce G. Willison                    First Interstate       Vice Chairman, Corporate Banking
Linnet F. Deily                      First Interstate       Vice Chairman, Retail Banking
Philip G. Heasley                    FBS                    Vice Chairman, Retail Product/Operations
</TABLE>

    Additional information about each of such persons is contained in FBS's  and
First  Interstate's respective  Annual Reports on  Form 10-K for  the year ended
December 31,  1994, which  are incorporated  by reference  in this  Joint  Proxy
Statement/Prospectus.  See "Available Information" and "Incorporation of Certain
Documents by Reference."

    Except for the foregoing,  it has not yet  been determined which members  of
FBS's  or  First  Interstate's  senior  management  will  also  become executive
officers of New  First Interstate  following the  Merger or  what such  persons'
titles   or  functions  will  be.  From  time  to  time  prior  to  consummation

                                       83
<PAGE>
of the  Merger,  decisions  may be  made  with  respect to  the  management  and
operations of New First Interstate following the Merger, including the selection
of additional executive officers of New First Interstate.

OPERATIONS

    Although no assurances can be given in such regard, FBS and First Interstate
expect  to  realize cost  savings of  approximately  $500 million  (pre-tax), in
various phases during  the one-year  period following the  Effective Time.  Such
cost  savings are expected to be  realized primarily through integration of data
processing and  other back  office operations,  as well  as the  elimination  of
redundant corporate overhead and staff positions. Cost reductions will come from
both  companies  and  will  be  spread  throughout  New  First  Interstate  on a
geographic basis. The  following table  provides details of  the estimated  cost
savings by type.

<TABLE>
<CAPTION>
TYPE OF COST
- --------------------------------------------------------  ESTIMATED COST
                                                             SAVINGS
                                                          --------------
                                                          (IN THOUSANDS)
<S>                                                       <C>
Staff/Executive.........................................   $    114,000
Data Processing.........................................         83,000
Operations..............................................        110,000
Occupancy/fixtures and equipment........................         39,000
Business Lines:
  Retail................................................        100,000
  Payment Systems.......................................         27,000
  Commercial............................................         18,000
  Trust.................................................          9,000
                                                          --------------
        Total...........................................   $    500,000
                                                          --------------
                                                          --------------
</TABLE>

   
    The  cost savings estimated above are based on information provided by First
Interstate during  FBS's  due  diligence investigation  and  the  knowledge  and
experience  FBS has accumulated from the prior acquisitions it has made over the
past five  years.  The significant  assumptions  related to  the  specific  cost
savings  categories are: (i) Staff/Executive: elimination of redundant functions
and locations  and incremental  staffing and  expenses based  on FBS's  marginal
costs.  FBS estimates  that the equivalent  of 850 of  the 1,224 Staff/Executive
positions will  be  eliminated  following  the  Merger;  (ii)  Data  Processing:
elimination  of one of  two data processing  locations, elimination of redundant
development  activities,  reduced  technology  expense  rates,  and  incremental
staffing and expense based on FBS's marginal costs. FBS believes, based upon its
acquisition  experience, that its systems integration  process will enable it to
integrate the systems and operations of First Interstate within three months  of
completion  of the Merger; (iii)  Operations: elimination of duplicative deposit
and loan  operations  and  incremental  staffing and  expenses  based  on  FBS's
marginal   costs;  (iv)  Occupancy/  Furniture  and  Equipment:  elimination  of
duplicative  headquarters,  staff,  and  operations  space  and  equipment;  (v)
Business  Lines:  RETAIL --  staffing to  FBS  teller and  salesperson benchmark
efficiency standards and reduction of overlapping management; PAYMENT SYSTEMS --
elimination of outsourced  processing and replacement  at FBS's marginal  costs;
reduced  switch costs; COMMERCIAL -- staffing  to FBS benchmarks and elimination
of overlapping management; TRUST --  staffing to FBS benchmarks and  elimination
of  overlapping management. Additional information regarding FBS's experience in
achieving  expense  reductions  following  acquisitions  is  contained  in   the
Comparison  under the heading "Comparison  of the Merger and  the Wells Offer --
Cost Savings and Associated Revenue Losses -- Anticipated Expense Reductions."
    

    The extent to which cost savings will be achieved is dependent upon  various
factors  beyond the  control of FBS  and First  Interstate, including regulatory
factors, economic  conditions,  unanticipated changes  in  business  conditions,
inflation   and  the  level  of   FDIC  assessments.  Therefore,  no  assurances

                                       84
<PAGE>
can be given with respect to the ultimate level of cost savings to be  realized,
or  that such savings will be realized  in the time frame currently anticipated.
See "Selected Historical and Unaudited Pro Forma Financial Data."

    FBS and  First Interstate  also  anticipate that  they will  incur  one-time
expenses and restructuring charges in connection with the Merger, which expenses
are estimated to be approximately $225 million (pre-tax) in the aggregate. These
items  principally result  from expenses to  be incurred in  connection with the
integration of operations  and systems,  elimination of  redundancies and  staff
reductions.  It  is anticipated  that substantially  all  of these  expenses and
charges will  be  incurred  during  1996 in  connection  with  the  Merger.  The
following table provides details of the estimated charges by type.

<TABLE>
<CAPTION>
TYPE OF COST
- ---------------------------------------------------------    ESTIMATED
                                                              CHARGE
                                                           -------------
                                                                (IN
                                                             THOUSANDS)
<S>                                                        <C>
Conversion costs.........................................   $   210,000
Severance................................................       175,000
Occupancy/equipment writedowns...........................        40,000
Other merger expenses....................................        50,000
                                                           -------------
  Subtotal...............................................   $   475,000
Reserve adjustments......................................      (250,000)
                                                           -------------
        Total............................................   $   225,000
                                                           -------------
                                                           -------------
</TABLE>

    Conversion  costs  consist  primarily  of  charges  related  to  system  and
operational integration. Severance costs consist of charges related to  employee
severance, termination of certain employee benefit plans and other related costs
resulting   from  employee  reductions.  Occupancy/equipment  writedowns  relate
primarily to  lease  termination  costs  and  computer  equipment  and  software
writeoffs  due to  duplication. In addition,  the combined  allowance for credit
losses  was  reduced  $250  million   to  conform  First  Interstate's   reserve
methodology to FBS's. The expenses and charges to be incurred in connection with
the  Merger are  dependent upon  various factors beyond  the control  of FBS and
First Interstate. No assurance can be given that such expenses and charges  will
not exceed the amounts described above.

   
    First  Interstate  will  reclassify  substantially  all  of  its  investment
securities portfolios  to available  for  sale prior  to  December 31,  1995  in
accordance  with  the  one-time  reclassification  opportunity  approved  by the
Financial  Accounting  Standards  Board.  See  "Unaudited  Pro  Forma  Condensed
Combined Financial Information."
    

    New   First  Interstate's   corporate  headquarters   will  be   located  in
Minneapolis, Minnesota, and its  core business lines will  be directed from  Los
Angeles,  California. In addition, it is expected that New First Interstate will
continue to  operate portions  of its  businesses from  existing FBS  and  First
Interstate locations on the West Coast and in the Rocky Mountain region.

INTERESTS OF CERTAIN PERSONS IN THE MERGER

    Certain   members  of  FBS's  management  and   the  FBS  Board,  and  First
Interstate's management and  the First  Interstate Board,  respectively, may  be
deemed  to have certain  interests in the  Merger that are  in addition to their
interests as  shareholders of  FBS or  First  Interstate, as  the case  may  be,
generally.  The FBS  Board and  the First Interstate  Board were  aware of these
interests and  considered them,  among other  matters, in  approving the  Merger
Agreement and the transactions contemplated thereby.

    BOARD  OF DIRECTORS.  At  the Effective Time, the  Board of Directors of New
First Interstate  will consist  of 20  persons (unless  otherwise agreed  to  in
writing prior to the Effective Time), 10 of whom

                                       85
<PAGE>
shall be "FBS Directors" (as hereinafter defined) and 10 of whom shall be "First
Interstate  Directors" (as  hereinafter defined). The  Merger Agreement provides
that after the Effective Time, the New First Interstate Board of Directors  will
consist  of  an  even number  of  directors, and  for  a period  of  three years
following the Effective Time, to the extent practicable, each class of directors
and each committee of the  Board will contain an  equal number of FBS  Directors
and  First Interstate  Directors. If  at any  time during  the three-year period
following the Effective Time  the number of FBS  Directors and First  Interstate
Directors serving, or that would be serving following the next annual meeting of
shareholders,  as directors of New First Interstate,  are or would not be equal,
then, subject to the fiduciary duties of the directors, the New First Interstate
Board of Directors and  the nominating committee of  New First Interstate  shall
take  such steps as may be requested by  the FBS Directors (if the number of FBS
Directors is,  or  would  otherwise  become,  less  than  the  number  of  First
Interstate  Directors) or the First Interstate Directors (if the number of First
Interstate Directors is, or would otherwise become, less than the number of  FBS
Directors)  to ensure that  there will be  an equal number  of FBS Directors and
First Interstate Directors, including by nominating and/or electing a person  or
persons  designated by the  FBS Directors or the  First Interstate Directors, as
applicable. "FBS Directors" are directors of  FBS at the Effective Time who  are
chosen  by  the  directors of  FBS  prior to  the  Effective Time  to  remain as
directors of  New First  Interstate at  the Effective  Time and  any person  who
becomes  a director and is designated as a FBS Director by the then-existing FBS
Directors. "First Interstate Directors" are directors of First Interstate at the
Effective Time who are chosen by the directors of First Interstate prior to  the
Effective Time to become directors of New First Interstate at the Effective Time
and  any person who becomes  a director and is  designated as a First Interstate
Director by the then-existing First Interstate Directors.

    SENIOR MANAGEMENT.   The  Merger Agreement  provides that  at the  Effective
Time,  John F.  Grundhofer, Chairman, President  and Chief  Executive Officer of
FBS, will be Chairman of the Board  of Directors and Chief Executive Officer  of
New  First Interstate. The Merger Agreement  also provides that at the Effective
Time, William  E.  B. Siart,  Chairman  and  Chief Executive  Officer  of  First
Interstate,  will  be the  President and  Chief Operating  Officer of  New First
Interstate.

    DIRECTORS  AND  OFFICERS  INSURANCE;   LIMITATION  OF  LIABILITY  OF   FIRST
INTERSTATE  AND FBS DIRECTORS AND OFFICERS.  The Merger Agreement requires that,
for a period of six  years after the Effective  Time, New First Interstate  will
use its best efforts to provide that portion of directors and officers liability
insurance that serves to reimburse the present and former directors and officers
of  FBS, First Interstate or any of their respective subsidiaries (determined as
of the Effective Time) (as opposed to  FBS or First Interstate) with respect  to
claims  against such officers  and directors arising from  facts or events which
occurred before the Effective Time, of  at least the same coverage and  amounts,
and  containing  terms and  conditions no  less  advantageous than  the coverage
currently provided by FBS; PROVIDED, HOWEVER,  that the annual premiums for  any
such  coverage will  not exceed  200% of the  annual premiums  currently paid by
First Interstate for such coverage; and provided, further, that the officers and
directors of  First  Interstate  or  any subsidiary  may  be  required  to  make
application  and  provide  customary  representations  and  warranties  to FBS's
insurance carrier for  the purpose  of obtaining such  insurance; and  provided,
further,  that  such coverage  will have  a single  aggregate for  such six-year
period in  an  amount  not less  than  the  annual aggregate  of  such  coverage
currently provided by First Interstate.

    The  Merger Agreement  also requires New  First Interstate  to indemnify and
hold harmless each present and former  director and officer of First  Interstate
and  FBS and their respective subsidiaries,  determined as of the Effective Time
(the "Indemnified Parties"), against any costs or expenses (including reasonable
attorneys fees),  judgments,  fines,  losses,  claims,  damages  or  liabilities
(collectively,  "Costs") incurred  in connection  with any  claim, action, suit,
proceeding  or  investigation,  whether   civil,  criminal,  administrative   or
investigative (each a "Claim"), arising out of or pertaining to matters existing
or  occurring at  or prior  to the Effective  Time, whether  asserted or claimed
prior to, at  or after  the Effective  Time, to  the fullest  extent that  First
Interstate,  FBS or such subsidiary would have been permitted under Delaware law
and the certificate of incorporation or bylaws of First

                                       86
<PAGE>
Interstate, FBS or  such subsidiary,  as in  effect on  the date  of the  Merger
Agreement, to indemnify such person. The Merger Agreement also provides that New
First  Interstate will advance  expenses incurred by  such persons in connection
with Claims to the fullest extent permitted under applicable law; provided, that
the person to whom expenses are  advanced provides an undertaking to repay  such
advances  if it  is ultimately  determined that such  person is  not entitled to
indemnification. These indemnification obligations of New First Interstate  will
continue in force for at least six years after the Effective Time and will apply
to any Claim asserted or made within such period (including, without limitation,
Claims  arising out  of or  pertaining to  the transactions  contemplated by the
Merger Agreement).

    NEW EMPLOYEE BENEFIT PLANS.  The Merger Agreement provides that the existing
employee benefit plans of FBS and First Interstate shall remain in effect  until
such  time  as New  Benefit  Plans are  developed  by New  First  Interstate for
employees who were covered prior to the  Effective Time by the benefit plans  of
FBS  or  First  Interstate. Pursuant  to  the  Merger Agreement,  FBS  and First
Interstate have also agreed that they will use their reasonable best efforts  to
provide  that the New Benefit Plans shall  treat former employees of FBS, on the
one hand, and  former employees of  First Interstate,  on the other  hand, on  a
substantially  equivalent  basis,  taking  into  account  all  relevant factors,
including,   without   limitation,   duties,   geographic   location,    tenure,
qualifications and abilities.

    The approval of the Merger Agreement by First Interstate's shareholders will
constitute  a  change  in  control  of First  Interstate  for  purpose  of First
Interstate's benefit plans,  and consummation  of the Merger  will constitute  a
change  in  control of  FBS for  purposes of  FBS's benefit  plans; accordingly,
provisions of certain  of these  benefit plans  will cause  the acceleration  of
vesting and/or payment of certain equity-based and cash-based incentives.

   
    FBS  CHANGE IN CONTROL  SEVERANCE AGREEMENTS.  In  January 1992, FBS adopted
change in control severance plans covering  a broad range of salaried  employees
and  providing for different levels of payments based on job classification. The
consummation of the Merger will constitute a change in control under such plans.
FBS has entered into individual change in control severance agreements providing
for severance payments to  27 officers upon  certain terminations of  employment
during  the two-year period following a change  in control of FBS, including the
Merger. Termination of employment must  be by FBS other  than for "cause" or  by
the  individual for  "good reason,"  as such terms  are defined  in the relevant
agreements. The agreements provide for a  lump sum payment equal to three  times
the   terminated  individual's  annual  salary,  plus  target  bonus  potential,
continuation of benefits  for up  to three  years, credit  for three  additional
years of service under FBS retirement plans and five additional years of service
under  FBS's Supplemental  Executive Retirement  Plan, the  payment of long-term
cash incentive awards  and individual  outplacement services.  Based on  current
salaries   and  target  bonus  potential,  assuming  termination  of  employment
qualifying for  payments under  the  applicable agreements,  executive  officers
would  be entitled to the following payments  in respect of the lump sum portion
of such benefits: Richard  A. Zona, $2,040,000;  Philip G. Heasley,  $1,739,000;
William  F.  Farley,  $1,539,000;  Daniel C.  Rohr,  $1,352,000;  and  all other
executive officers as  a group, $8,078,000.  Mr. Grundhofer's arrangements  with
FBS relating to severance are described under "-- Employment Agreement with John
F.  Grundhofer." FBS has further agreed  to compensate such officers for certain
taxes and penalties resulting from the severance pay agreement.
    

   
    FBS STOCK OPTIONS AND RESTRICTED STOCK.  The vesting of all outstanding  FBS
stock  options accelerates  and restrictions  on restricted  stock lapse  upon a
change in control of FBS, including the Merger. As of December 31, 1995, Messrs.
Grundhofer, Zona, Heasley,  Farley and  Rohr held unvested  options to  purchase
279,426,  129,404, 113,443,  110,981, and  103,904 shares  of FBS  Common Stock,
respectively, at a weighted average price of $41.03, $41.14, $42.58, $42.14  and
$43.00  per share, respectively,  and 95,545, 66,915,  50,794, 35,642 and 17,461
shares  of  restricted  stock,  respectively.  As  of  December  31,  1995,  all
participants  in  FBS  stock plans  held  unvested  options with  respect  to an
aggregate of 3,013,323 shares of FBS Common Stock at a weighted average exercise
price of $37.52  per share,  and an aggregate  of 543,207  shares of  restricted
stock.
    

                                       87
<PAGE>
    EMPLOYMENT  AGREEMENT WITH JOHN F. GRUNDHOFER.   Effective January 30, 1995,
FBS and John F. Grundhofer entered into an Employment Agreement (the "Employment
Agreement")  with  an  initial  three-year  term  that,  subject  to  notice  of
termination,  automatically  extends  by one  year  on each  anniversary  of the
agreement. Under the Employment Agreement Mr. Grundhofer is entitled to  receive
an  annual salary of  not less than  $620,000 and is  entitled to participate in
FBS's executive  bonus program.  Mr. Grundhofer  is entitled  to participate  in
various  benefit  programs covering,  and to  receive various  personal benefits
offered to, corporate executives of FBS.  FBS has agreed to continue to  provide
Mr.  Grundhofer with a $1  million life insurance policy  during the term of the
Employment Agreement.

   
    Mr. Grundhofer's Employment  Agreement also provides  severance benefits  in
the event of termination of employment under certain circumstances. In the event
of  termination of  employment without "cause"  or by Mr.  Grundhofer with "good
reason" (as such terms are defined in the Employment Agreement), in addition  to
compensation  and benefits already earned, he will be entitled to receive: (i) a
lump sum payment equal to three times annual salary plus target bonus potential,
(ii) continuation of his participation in  FBS benefit and retirement plans  and
continuation  of the $1 million  life insurance policy for  a three year period,
(iii) continuation of personal benefits for a three year period, (iv)  immediate
exercisability  of all options  and vesting of restricted  stock that would have
become exercisable  or  vested  during  the remaining  term  of  the  Employment
Agreement  if no such termination had  occurred, (v) credit for three additional
years of service under  FBS's Supplemental Executive  Retirement Plan, and  (vi)
payment  for  individual outplacement  counseling services  up  to a  maximum of
$60,000. In the event FBS  terminates Mr. Grundhofer's employment with  "cause,"
or  he terminates employment without "good reason," Mr. Grundhofer would forfeit
all compensation  and  benefits following  such  termination. In  the  event  of
termination  of  employment  without "cause"  or  by Mr.  Grundhofer  with "good
reason" within 24 months  following a change in  control, including the  Merger,
the  following  additional  provisions  will  apply:  (vii)  the  bonus  used to
calculate the lump  sum payment  under (i)  above will  be the  greatest of  Mr.
Grundhofer's  (a) target bonus  potential available on  the date of termination,
(b) the bonus earned in the last  fiscal year prior to the date of  termination,
or (c) the average bonus earned in the last three fiscal years prior to the date
of  termination;  (viii)  credit shall  be  given  for five  (instead  of three)
additional years  of  service  under  (v)  above; and  (ix)  FBS  will  pay  Mr.
Grundhofer  the full amount of  any long-term cash incentive  award for any plan
periods then in progress  to the extent  not provided for  in any FBS  long-term
cash  incentive plan or plans.  Based on his current  salary bonus paid in 1995,
assuming termination of  employment qualifying for  change in control  severance
payments  under the agreement, Mr. Grundhofer would  be entitled to a payment of
$5,115,000 in respect of the lump sum portion of such termination benefits.
    

    Mr.  Grundhofer's  Employment  Agreement  provides  that  the  payments  and
benefits  which he  is entitled to  receive in  the event of  termination of his
employment will  be  reduced  by  certain amounts  which  he  earns  from  other
employment or services during the three-year period following his termination of
employment  with FBS.  FBS has agreed  to compensate Mr.  Grundhofer for certain
taxes and penalties which may  be imposed as a  result of payments and  benefits
which  he receives in the event of  termination of his employment after a change
in control, including the Merger.

    FIRST INTERSTATE CHANGE IN CONTROL  SEVERANCE AGREEMENTS.  First  Interstate
has   entered  into  individual  employment  agreements  with  approximately  39
executive officers  of First  Interstate and  its subsidiaries  (nine of  which,
including  the agreements  between First  Interstate and  each of  Mr. Siart and
Messrs. William S. Randall, Bruce G. Willison and James J. Curran, each of  whom
is  one of the executive officers named  in the proxy statement, dated March 20,
1995, sent by  First Interstate  to its  shareholders in  connection with  First
Interstate's  Annual Meeting of Stockholders held on April 28, 1995, are "Tier I
Agreements," and the remainder of which are "Tier II Agreements") which provide,
among  other  things,  for  severance  payments  upon  certain  terminations  of
employment  during the  two-year period following  a change in  control of First
Interstate. In  order to  qualify for  the severance  benefits described  below,
termination    of   employment    must   be    by   First    Interstate   or   a

                                       88
<PAGE>
   
successor employer during the two-year period  following a change in control  of
First  Interstate other than for "cause" or  by the executive for "good reason,"
as such terms are defined in the agreements. The Tier I Agreements provide that,
following a qualifying termination, the executive is entitled to receive a  lump
sum payment equal to (1) $30,000 (for the purpose of purchasing welfare benefits
during the three years following termination), (2) three times the sum of annual
salary plus the aggregate of the executive's target bonus awards for the year in
which  the  executive's employment  terminates under  all of  First Interstate's
incentive plans under  which the executive  was then participating  and (3)  the
benefit  attributable to enhancing  the executive's retirement  plan benefits by
three years' service and three years' age. If the qualifying termination  occurs
during  the calendar  year in  which the change  in control  of First Interstate
occurs, the  severance  benefit  is  reduced  by  a  pro  rata  portion  of  the
executive's target bonus for the calendar year in which such termination occurs.
The  terms of the Tier  II Agreements are substantially  similar to those of the
Tier I  Agreements,  except  that  the severance  payments  under  the  Tier  II
Agreements have a multiplier of two, include a $20,000 cash payment to cover two
years'  health and welfare benefit plan coverage, and provide for enhancement of
retirement benefits  by  two years'  service  and two  years'  age. The  Tier  I
Agreements  and Tier II Agreements  provide that an executive  may refuse all or
any portion of the severance payments  if the executive determines that  receipt
of  such  payment may  result in  adverse tax  consequences to  him or  her. The
approval of  the Merger  Agreement  by the  First Interstate  shareholders  will
constitute  a change in control under the terms of the Tier I Agreements and the
Tier II Agreements. If a change in control of First Interstate were to occur and
the employment of all of First Interstate's executive officers was terminated on
or about the same date under circumstances entitling them to severance  benefits
under  their employment agreements, executive officers  would be entitled to the
following approximate amounts:  Mr. Siart, $4,570,000;  Mr. William S.  Randall,
$3,420,000;  Mr. Bruce G. Willison, $2,730,000; Mr. James J. Curran, $2,690,000;
Ms. Linnet F. Deily,  $2,270,000; and all other  executive officers as a  group,
$29,000,000.
    

   
    FIRST  INTERSTATE  EQUITY-BASED INCENTIVE  AWARDS.   The  provisions  of the
Merger Agreement relating to the  conversion of stock options outstanding  under
First  Interstate Stock Plans  are described under "The  Merger -- Conversion of
First Interstate Capital Stock;  Effects on FBS  Shareholders." Pursuant to  the
terms  of the  First Interstate  Stock Plans,  upon the  approval of  the Merger
Agreement by the shareholders of  First Interstate, each First Interstate  Stock
Option  and  related stock  appreciation right  held  by active  employees shall
become immediately  exercisable, all  restrictions  with respect  to  restricted
stock  will automatically lapse  and, unless otherwise  provided in an agreement
evidencing a  performance  unit,  all performance  units  shall  be  immediately
payable  in New First  Interstate Common Stock,  provided in any  case that such
awards (other than  restricted stock awards)  may not be  accelerated to a  date
less  than six months after the date of  grant. As of December 31, 1995, Messrs.
Siart, Randall, Willison and Curran and Ms. Deily held unvested First Interstate
Stock Options with respect to 101,250, 57,750, 43,750, 43,250 and 42,750  shares
of  First Interstate Common Stock, respectively,  at a weighted average exercise
price of $65.85, $68.41 $64.58, $64.90,  and $65.22 per share, respectively.  As
of  December 31, 1995, all other  participants in First Interstate's Stock Plans
held unvested First  Interstate Stock Options  with respect to  an aggregate  of
1,790,550 shares of First Interstate Common Stock at a weighted average exercise
price  of $66.53 per share and an  aggregate of 8,849 restricted shares of First
Interstate Common Stock.
    

   
    FIRST INTERSTATE CASH-BASED  INCENTIVE AWARDS.   First Interstate  maintains
for  the benefit of certain of the executive officers and key employees of First
Interstate and its affiliates  three cash-based incentive  plans. Each of  these
plans  provides that,  within 10  days following  a change  in control  of First
Interstate, a participant will receive 100% of  his or her target bonus for  the
year in which the change in control occurs. The approval of the Merger Agreement
by  First  Interstate  shareholders  will constitute  a  change  in  control for
purposes of  these cash-based  incentive plans.  It is  currently intended  that
target cash incentive awards for 1996 will be established in a manner similar to
those  established for 1995 under First  Interstate's annual incentive plans; if
1996 target awards are established on a similar basis, upon a change in  control
of First Interstate, Messrs. Siart, Randall,
    

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<PAGE>
   
Willison,  Curran and Ms. Deily would be entitled to receive $864,000, $572,000,
$450,000, $395,000 and  $430,000, respectively,  and all  other participants  in
such  plans would  be entitled to  receive an aggregate  amount of approximately
$17,000,000.
    

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

    First Interstate  and  FBS expect  that  the Merger  will  be treated  as  a
tax-free  reorganization within  the meaning of  Section 368(a) of  the Code and
that for federal income tax purposes no  gain or loss will be recognized by  any
shareholder  of First Interstate upon the receipt of New First Interstate Common
Stock for First Interstate Common Stock or New First Interstate Preferred  Stock
for  First Interstate  Preferred Stock  pursuant to  the Merger  (except for the
receipt of cash in lieu of a  fractional share interest in New First  Interstate
Common  Stock). The  Internal Revenue Service  (the "Service") has  not been and
will not be  asked to rule  upon the  tax consequences of  the Merger.  Instead,
First  Interstate will rely upon the opinion  of Skadden, Arps, Slate, Meagher &
Flom, its  counsel, and  FBS will  rely upon  the opinion  of Dorsey  &  Whitney
P.L.L.P.,  its counsel,  as to  certain federal  income tax  consequences of the
Merger. Such  opinions will  be  based upon  facts  described therein  and  upon
certain  assumptions and representations  that will be  made by First Interstate
and FBS. The  opinions of  Skadden, Arps,  Slate, Meagher  & Flom  and Dorsey  &
Whitney  P.L.L.P.  will  be based  upon  the Code,  the  Regulations promulgated
thereunder, current administrative rulings and practice and judicial  authority,
all  of which are subject to change. An opinion of counsel is not binding on the
Service and  there can  be no  assurance, and  none is  hereby given,  that  the
Service  will not take a position contrary to one or more positions reflected in
such opinions or that such opinions will  be upheld by the courts if  challenged
by  the  Service.  EACH  HOLDER  OF  FIRST  INTERSTATE  COMMON  STOCK  AND FIRST
INTERSTATE PREFERRED STOCK IS URGED TO CONSULT HIS OR HER OWN TAX AND  FINANCIAL
ADVISORS  AS TO THE EFFECT OF SUCH FEDERAL INCOME TAX CONSEQUENCES ON HIS OR HER
OWN PARTICULAR FACTS AND CIRCUMSTANCES AND ALSO AS TO ANY STATE, LOCAL,  FOREIGN
OR OTHER TAX CONSEQUENCES ARISING OUT OF THE MERGER.

    The  obligation of each of First Interstate and FBS to consummate the Merger
is conditioned on, among  other things, the receipt  by First Interstate of  the
opinion  of Skadden, Arps, Slate,  Meagher & Flom and the  receipt by FBS of the
opinion of Dorsey & Whitney P.L.L.P., each of which will be based upon facts and
representations to be provided to such firms, and subject to various assumptions
and qualifications, substantially to the effect that the Merger will qualify  as
a  "reorganization"  under Section  368(a) of  the Code  and that  the following
material federal income tax consequences will result from the Merger:

        (a) No  gain or  loss will  be recognized  by FBS,  First Interstate  or
    Merger Sub as a result of the Merger;

        (b)  No gain  or loss  will be recognized  by the  shareholders of First
    Interstate who  exchange  their  First  Interstate  Common  Stock  or  First
    Interstate  Preferred Stock solely for New  First Interstate Common Stock or
    New First Interstate Preferred Stock,  respectively, pursuant to the  Merger
    (except with respect to cash received in lieu of a fractional share interest
    in New First Interstate Common Stock); and

        (c) The tax basis of the New First Interstate Common Stock and New First
    Interstate  Preferred Stock  received by  First Interstate  shareholders who
    exchange all of  their First  Interstate Common Stock  and First  Interstate
    Preferred  Stock solely for New First  Interstate Common Stock and New First
    Interstate Preferred Stock, respectively, in the Merger will be the same  as
    the  tax  basis of  the First  Interstate Common  Stock or  First Interstate
    Preferred Stock,  as  the case  may  be, surrendered  in  exchange  therefor
    (reduced  by any amount  allocable to a fractional  share interest for which
    cash is received).

   
    The foregoing is a  description of the  material anticipated federal  income
tax  consequences  of the  Merger, without  regard to  the particular  facts and
circumstances of the tax situation of  each shareholder of First Interstate.  It
does not discuss all of the consequences that may be relevant to shareholders of
First Interstate entitled to special treatment under the Code (such as insurance
companies,
    

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<PAGE>
   
dealers   in  securities,  exempt  organizations   or  foreign  persons)  or  to
shareholders of First  Interstate who  acquired their  First Interstate  capital
stock  pursuant  to  the exercise  of  employee  stock options  or  otherwise as
compensation. No  information  is  provided  herein  with  respect  to  the  tax
consequences,  if any, of the Merger or  the exchange of shares pursuant thereto
under state, local, foreign or other tax laws.
    

   
    If such  required tax  opinions are  not received,  the Merger  will not  be
consummated  unless the  conditions requiring their  receipt are  waived and the
approvals of FBS and First Interstate  shareholders are resolicited by means  of
an updated Joint Proxy Statement/Prospectus.
    

STOCK EXCHANGE LISTING OF NEW FIRST INTERSTATE COMMON STOCK AND NEW FIRST
INTERSTATE DEPOSITARY SHARES

    FBS  has agreed  to use its  best efforts to  cause the shares  of New First
Interstate Common Stock  and New  First Interstate Depositary  Shares which  are
issuable  in the  Merger to  be approved for  listing on  the NYSE  prior to the
Effective Time, subject to official notice of issuance. It is a condition to the
obligations of  First Interstate  and FBS  to consummate  the Merger  that  such
securities  be approved for listing  on the NYSE, subject  to official notice of
issuance.

RESALE OF NEW FIRST INTERSTATE COMMON STOCK AND NEW FIRST INTERSTATE DEPOSITARY
SHARES RECEIVED BY FIRST INTERSTATE SHAREHOLDERS

    The shares of  New First Interstate  Common Stock and  New First  Interstate
Depositary Shares issuable to shareholders of First Interstate upon consummation
of the Merger have been registered under the Securities Act. Such securities may
be traded freely without restriction by those shareholders who are not deemed to
be  "affiliates" of First  Interstate or New  First Interstate, as  that term is
defined in rules promulgated under the Securities Act.

    Shares of  New  First  Interstate  Common  Stock  or  New  First  Interstate
Depositary  Shares received  by those shareholders  of First  Interstate who are
deemed to  be  "affiliates"  of  First  Interstate at  the  time  of  the  First
Interstate  Special  Meeting  may  be  resold  without  registration  under  the
Securities Act only  as permitted by  Rule 145  under the Securities  Act or  as
otherwise  permitted under  the Securities Act.  Commission guidelines regarding
qualifying for the pooling-of-interests method of accounting also limit sales of
shares of the acquiring and acquired company by affiliates of either company  in
a   business  combination.  Commission  guidelines  indicate  further  that  the
pooling-of-interests method of  accounting will generally  not be challenged  on
the basis of sales by affiliates of the acquiring or acquired company if they do
not  dispose of any  of the shares  of the corporation  they own or  shares of a
corporation they receive in connection with a merger during the period beginning
30 days before the merger and ending when financial results covering at least 30
days of post-merger operations of the combined operations have been published.

    Each of FBS and First Interstate has  agreed in the Merger Agreement to  use
its  reasonable best efforts to obtain and deliver to the other party as soon as
practicable, and in any event prior to the date of the Special Meetings,  signed
representation  letters from each  director, executive officer  and other person
who may reasonably be deemed  to be an "affiliate" of  such party to the  effect
that  such persons  will not,  among other  things, offer  to sell,  transfer or
otherwise dispose of any of the shares  of New First Interstate Common Stock  or
New  First  Interstate Depositary  Shares distributed  to  them pursuant  to the
Merger except (i) with respect to affiliates of First Interstate, in  compliance
with  Rule 145, or in  a transaction that, in  the opinion of counsel reasonably
satisfactory to New First Interstate, is otherwise exempt from the  registration
requirements  of the Securities Act, or in an offering which is registered under
the Securities  Act  and  (ii) with  respect  to  affiliates of  each  of  First
Interstate   and  FBS,  in  compliance   with  Commission  guidelines  regarding
qualifying for  pooling-of-interests  accounting  treatment.  This  Joint  Proxy
Statement/Prospectus does not cover resales of New First Interstate Common Stock
or  New First Interstate Depositary Shares received by persons who are deemed to
be "affiliates" of First Interstate. No person is authorized to make use of this
Joint Proxy Statement/ Prospectus in connection with any such resales.

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<PAGE>
FBS DIVIDEND REINVESTMENT AND COMMON STOCK PURCHASE PLAN

    Pursuant  to its Automatic  Dividend Reinvestment and  Common Stock Purchase
Plan  (the  "FBS  Reinvestment  and  Purchase  Plan"),  FBS  provides   eligible
shareholders  with  a  method  of investing  cash  dividends  and  optional cash
payments at 100% of the  average price (as defined  in the FBS Reinvestment  and
Purchase  Plan) in additional shares of FBS  Common Stock without payment of any
brokerage commission or service charge.  The FBS Reinvestment and Purchase  Plan
includes  certain dollar limitations on  participation and provides for eligible
shareholders to  elect  dividend reinvestment  on  only  a part  of  the  shares
registered  in  the name  of  a participant  (while  continuing to  receive cash
dividends on remaining shares). It is anticipated that the FBS Reinvestment  and
Purchase  Plan will continue  after the Effective Time  and that shareholders of
First Interstate who  receive New First  Interstate Common Stock  in the  Merger
will have the right to participate therein.

EXPENSES

    The  Merger  Agreement  provides that  the  costs and  expenses  incurred in
connection with such agreement and the transactions contemplated thereby will be
paid by the party incurring such costs  and expenses, except that the costs  and
expenses of printing and mailing this Joint Proxy Statement/ Prospectus, and all
filing and other fees paid to the Commission in connection with the Merger, will
be borne equally by FBS and First Interstate.

CERTAIN LITIGATION

   
    Certain  present and former members of  the First Interstate Board have been
named  as  defendants  in  several   purported  shareholder  class  actions   in
California,  and certain present members of the First Interstate Board and First
Interstate have been named as defendants in several purported shareholder  class
actions in Delaware, alleging that the First Interstate Board will breach or has
breached  its  fiduciary  duties  to the  shareholders  of  First  Interstate in
responding to  the  Initial Wells  Proposal.  In Delaware,  the  following  five
actions  were filed on  October 18 and  19, 1995: WILLIAMSON  V. BRYSON, ET AL.,
Del. Ch., C.A. No. 14623; SHAEV V.  FIRST INTERSTATE BANCORP, ET AL., Del.  Ch.,
C.A.  No. 14629; BERNSTEIN V. CARSON, ET AL.,  Del. Ch., C.A. No. 14630; KATZ V.
FIRST INTERSTATE BANCORP, ET AL., Del. Ch., C.A. No. 14632; and SACHS AND FELDER
V. FIRST INTERSTATE BANCORP, ET  AL., Del. Ch., C.A.  No. 14633. On October  25,
1995,  an amended purported class action  complaint to consolidate these actions
was filed. On  October 27, 1995,  these actions were  consolidated in an  action
captioned  IN RE FIRST INTERSTATE BANCORP  SHAREHOLDER LITIG., Del. Ch., Consol.
C.A. No.  14623 (the  "Delaware  Consolidated Action").  The defendants  in  the
Delaware  Consolidated  Action  have filed  an  answer denying  the  claims. The
parties in  the  Delaware Consolidated  Action  have  agreed to  a  schedule  of
discovery  in an  order that was  entered on  November 8, 1995.  On November 13,
1995, the Delaware shareholder plaintiffs sought leave to file a Second  Amended
and  Supplemental Class Action Complaint (the "Second Amended Complaint"). Among
other things, the proposed Second Amended Complaint seeks to add FBS and  Merger
Sub  as parties  and to  assert aiding and  abetting claims  against them. Among
other claims,  the proposed  Second  Amended Complaint  alleges that  the  First
Interstate  defendants breached their  fiduciary duties by  failing to conduct a
fair bidding  contest  for  the  company.  In  addition,  it  alleges  that  the
defendants  have  implemented  certain  measures  which  may  impede  any  proxy
solicitation or consent  solicitation that Wells  may undertake. The  plaintiffs
seek  a variety of injunctive and other  relief including an order enjoining the
Merger and a declaration that the Fee Agreements and the Stock Option Agreements
are null and void. On  November 16, 1995 an action  entitled HOOK V. CARSON,  ET
AL.,  Del.  Ch., C.A.  No.  14704, was  filed,  which alleges  claims  which are
substantially similar to those  made in the  other Delaware shareholder  actions
which have been consolidated into the previously disclosed Delaware Consolidated
Action.
    

   
    On December 12, 1995 the plaintiffs in the Delaware Consolidated Action were
granted  leave to file  a Third Amended and  Supplemental Class Action Complaint
(the "Third Amended Complaint"). In addition to the claims previously alleged in
the Second Amended Complaint, the Third Amended Complaint alleges that the First
Interstate Board, during its evaluation of potential strategic partners,  failed
to  consider  adequately  that  FBS's repurchases  of  its  own  stock allegedly
"artificially inflated or supported"  the market price of  the FBS Common  Stock
and therefore affected negatively
    

                                       92
<PAGE>
   
the  fairness  of the  consideration offered  in the  Merger. The  Third Amended
Complaint also alleges that First Interstate's Schedule 14D-9, press release and
letter to shareholders, all dated and filed  with the SEC on November 20,  1995,
contain  untrue statements of  material facts and omit  other material facts. In
addition to  the  relief  previously  requested,  the  Third  Amended  Complaint
requests,  among  other  things,  an order  compelling  the  defendants  to make
supplemental disclosure of the allegedly omitted facts. First Interstate and the
First Interstate  Board  defendants have  moved  to dismiss  the  Third  Amended
Complaint.  The court has scheduled a  trial of the Delaware Consolidated Action
for February 12, 13 and 14, 1996, with closing arguments to be held on  February
15, 1996. The court has stated that it will issue a ruling on February 16, 1996.
    

   
    Seven  purported class actions have been filed  in the Superior Court of the
State of California, County of Los  Angeles. Those purported class actions  (the
"California  Actions") are entitled: MESKO V. BRYSON, ET AL., Case No. BC137379;
EAVES V. BRYSON, ET AL.,  Case No. BC137380; GRILL V.  BRYSON, ET AL., Case  No.
BC137508;  MONDSHEIN V. BRYSON, ET AL., Case  No. BC137509; KAPLAN V. BRYSON, ET
AL., Case No. BC138630; KAPLAN V. BRYSON, ET AL., Case No. 138369; and THORNHILL
V. BRYSON, ET AL. (Case No.  BC139252). Defendants in these seven actions  moved
the   Court  to  stay  the  actions  pending  the  resolution  of  the  Delaware
Consolidated Action, and this motion was granted on November 22, 1995.
    

   
    The complaints filed in the seven California actions are similar and  allege
that  the directors  of First Interstate  will breach their  fiduciary duties in
responding to the Initial Wells  Proposal. In addition, these complaints  allege
negligent  breach of fiduciary duty, abuse  of control and tortious interference
with prospective economic advantage. Plaintiffs  in the California Actions  seek
declaratory  relief  as  well  as permanent  and  preliminary  injunctive relief
enjoining the defendants from taking steps  to prevent or frustrate the sale  of
First  Interstate to Wells. In addition,  Plaintiffs seek monetary damages of an
unspecified  amount  together  with  prejudgment  interest  and  attorneys'  and
experts' fees.
    

   
    Two  actions have  been filed  in the United  States District  Court for the
Central District of California: KAPLIN V.  BRYSON, ET AL. (Civ. No. 95-7954  RG)
and  BRADLEY V.  SIART, ET AL.  (Civ. No. 95-8047  AAH). The KAPLIN  action is a
shareholder derivative action purportedly brought on behalf of First  Interstate
against  the Board of  Directors of First Interstate,  a former First Interstate
director, FBS and FBS's Chairman and Chief Executive Officer. The action alleges
breach of fiduciary  duty, abuse of  control and unjust  enrichment against  the
First Interstate individual defendants and alleges that FBS and its Chairman and
Chief  Executive Officer  aided and  abetted the  other defendants  in breaching
their fiduciary  duties.  The plaintiff  seeks  declaratory relief  as  well  as
preliminary  and  permanent  injunctive  relief  enjoining  defendants  from (1)
enforcing defensive measures designed to  prevent an auction, bidding or  tender
offer  for First Interstate; and (2) proceeding  with the Merger until the value
of that transaction can be shown to compare favorably with the takeover  premium
available following an auction. In addition, plaintiff seeks monetary damages of
an  unspecified  amount together  with prejudgment  interest and  attorneys' and
experts' fees. The  defendants have  moved to stay  or dismiss  this action.  No
relief  is sought  against First  Interstate, which is  named only  as a nominal
defendant.
    

   
    The BRADLEY action was  brought purportedly on behalf  of a class of  common
shareholders  and  names the  Board of  Directors of  First Interstate,  FBS and
Donaldson, Lufkin & Jenrette ("DLJ") as defendants. This complaint alleges  that
First  Interstate's directors breached their fiduciary duty by entering into the
Merger Agreement and allegedly preventing  third parties, including Wells,  from
acquiring  all of the First Interstate Common Stock  at a price in excess of the
current market  price. Plaintiff  further alleges  that FBS  and DLJ  aided  and
abetted  the other defendants in breaching  their fiduciary duties. In addition,
this complaint alleges violations  of sections 14(e) and  14(a) of the  Exchange
Act,  abuse  of  control,  unfair  business  practices,  unjust  enrichment  and
constructive fraud. The plaintiff  seeks injunctive relief  as well as  monetary
damages  of  an unspecified  amount, including  punitive damages,  together with
prejudgment interest and  attorneys' fees. First  Interstate is not  named as  a
defendant in this action.
    

   
    On  November 27, 1995, an additional purported class action was filed in the
Los Angeles Superior Court  against the Board of  Directors of First  Interstate
and FBS. The action, entitled BRADLEY V. SIART,
    

                                       93
<PAGE>
   
ET  AL. (Case No. BC139665), alleges  that First Interstate's directors breached
their fiduciary  duties by  entering  into the  Merger Agreement  and  allegedly
preventing  third  parties (including  Wells) from  acquiring  all of  the First
Interstate Common  Stock at  a price  in  excess of  the current  market  price.
Plaintiff  further alleges  that FBS aided  and abetted the  other defendants in
breaching their fiduciary duties. In  addition, this complaint alleges abuse  of
control,  unfair business  practices, unjust enrichment  and constructive fraud.
Plaintiff seeks injunctive relief as well as monetary damages of an  unspecified
amount,  including  punitive  damages, together  with  prejudgment  interest and
attorneys' fees. First Interstate is not named as a defendant in this action.
    

   
    In addition, on  November 13,  1995, Wells  filed in  the Delaware  Chancery
Court  a Verified Complaint for Preliminary  and Permanent Injunctive Relief and
Declaratory Judgment  (the "Wells  Action") against  First Interstate,  and  the
members  of the  First Interstate  Board, FBS and  Merger Sub.  The Wells Action
alleges, among  other  things, that  First  Interstate and  its  directors  have
breached  their fiduciary  duties by entering  into the Merger  Agreement and by
agreeing to the First  Interstate Fee Agreement and  the First Interstate  Stock
Option  Agreement. In addition, it alleges  that the defendants have implemented
or may implement  certain measures which  may impede any  proxy solicitation  or
consent  solicitation that Wells  may undertake. For  example, Wells has alleged
that the First  Interstate defendants  could amend the  First Interstate  Rights
Agreement  to provide that  the power to  redeem the First  Interstate Rights is
exercisable only by the current members  of the First Interstate Board if  Wells
succeeds  in replacing  them with directors  nominated by Wells.  Wells has also
alleged that if certain  provisions of First  Interstate's Bylaws regarding  the
nomination  of directors were to apply in the context of a consent solicitation,
such application of these  provisions of the bylaws  would be inconsistent  with
the  provisions of  the DGCL. The  Wells Action  alleges that FBS  has aided and
abetted First Interstate and its directors' alleged breaches of fiduciary  duty.
Among other relief, Wells seeks to invalidate the First Interstate Fee Agreement
and  the First Interstate Stock Option  Agreement and to enjoin First Interstate
from consummating the Merger.  Wells also seeks to  enjoin the First  Interstate
defendants  from including  any provisions similar  to the  First Interstate Fee
Agreement or the  First Interstate  Stock Option  Agreement in  any modified  or
future  agreement with  FBS. In  addition, Wells seeks  to enjoin  any action by
defendants  which  could  interfere  with  any  proxy  solicitation  or  consent
solicitation  that Wells  may undertake. Wells  seeks declaratory  relief in the
form of an order declaring, among  other things, that its exchange offer,  proxy
solicitation  and consent solicitation will not constitute tortious interference
with the Merger Agreement or any  other business-related tort; that Section  203
of  the DGCL  would not  apply to  any second-step  merger with  Wells; that the
Merger Agreement, the First  Interstate Fee Agreement  and the First  Interstate
Stock  Option Agreement  are void  and unenforceable;  and that  the Wells Offer
would be a  Qualified Offer within  the meaning of  the First Interstate  Rights
Agreement. With respect to the First Interstate Rights Agreement, Wells seeks an
order  requiring First Interstate  to redeem the First  Interstate Rights, or an
order requiring First Interstate to amend the First Interstate Rights  Agreement
so  as to make it  inapplicable to the Wells Offer  or to any second-step merger
which follows the Wells Offer.
    

   
    On November 30,  1995, Wells filed  a First Amended  Verified Complaint  for
Preliminary  and Permanent Injunctive  Relief (the "Amended  Wells Action"). The
Amended Wells Action  adds two counts  to the original  Wells Action. Wells  has
alleged  that the First Interstate directors did not consider the differences in
the imputed  market  value  of the  Merger  and  the Wells  Offer.  Wells  seeks
injunctive  relief  requiring the  First  Interstate directors  to  consider the
alleged differences in the imputed values of the Merger and the Wells Offer.  In
addition,  Wells  alleges that  repurchases  of FBS  Common  Stock by  FBS after
November 6, 1995 have had  the effect of artificially  raising the price of  the
FBS  Common Stock, thereby  denying First Interstate's  stockholders an accurate
reading of the  market value of  the Exchange Ratio;  that the First  Interstate
directors  knew or should have known that the  price of the FBS Common Stock was
and is being  inflated by FBS;  that the  First Interstate Board  failed to  (a)
require  as a condition to the Merger that FBS refrain from conducting any stock
repurchases that influence the price of  its stock, (b) inquire whether FBS  was
repurchasing  its stock and if so, to ask  FBS to cease such repurchases and (c)
reveal to First Interstate stockholders all pertinent information regarding  the
purchases   of  FBS   stock.  With   respect  to   these  claims,   Wells  seeks
    

                                       94
<PAGE>
   
injunctive relief requiring the First Interstate defendants to disclose that FBS
has been repurchasing its own stock and that such repurchases have inflated  the
price  of FBS  stock. Wells  has alleged  that FBS  has aided  and abetted these
alleged breaches  of fiduciary  duty. FBS  and First  Interstate have  moved  to
dismiss the Amended Wells Action.
    

   
    On  December 14,  1995 and  December 18,  1995, respectively,  FBS and First
Interstate filed  suit against  Wells  in the  Federal  District Court  for  the
District  of Delaware (the "Delaware Federal Actions"). In their complaints, FBS
and First Interstate allege  that Wells has embarked  upon a campaign of  deceit
and  manipulation designed  to undermine  the Merger  and to  interfere with the
First Interstate  shareholders'  ability to  assess  fairly and  accurately  the
merits  of the Merger. FBS and First  Interstate allege that Wells' campaign has
included the improper manipulation of Wells' stock price, and the non-disclosure
and misrepresentation of numerous material facts in violation of Sections  14(a)
and  14(e) of the  Exchange Act. FBS  and First Interstate  request, among other
things, injunctive relief ordering  Wells to publicly  disclose and correct  its
violations  of the  securities laws.  FBS and  First Interstate  also request an
order enjoining Wells from pursuing the Wells  Offer until such time in 1996  as
the  1996 earnings and other estimates disseminated  by Wells can be verified or
disproved through the reporting of actual earnings.
    

   
    On December 22,  1995, Wells  asserted counterclaims against  FBS and  First
Interstate  in the  Delaware Federal Actions.  Wells alleges that  FBS and First
Interstate have  engaged in  non-disclosure and  misrepresentations of  material
facts  in violation of Sections  14(a) and 14(e) of  the Exchange Act, and seeks
injunctive relief requiring  FBS and  First Interstate, among  other things,  to
correct the allegedly false and misleading statements. The court in the Delaware
Federal  Actions  has  scheduled  oral  argument  on  the  parties'  motions for
injunctive relief for February 2, 1996.
    

   
    On December  27,  1995, an  action  was  filed by  several  purported  First
Interstate shareholders against First Interstate, FBS and various members of the
First  Interstate  Board  in the  Federal  District  Court for  the  District of
Delaware. This action, WILLIAMSON V. FIRST INTERSTATE BANCORP, C.A. No.  95-810,
contains allegations similar to those asserted by Wells in its counterclaims.
    

   
    FBS  and First Interstate  intend to defend  vigorously the foregoing claims
against them, and  believe that  such claims will  not have  a material  adverse
effect on their ability to consummate the Merger in a timely manner.
    

   
MATERIAL DIFFERENCES IN RIGHTS OF SHAREHOLDERS OF FIRST INTERSTATE AND NEW FIRST
INTERSTATE
    

    The  rights of  of First Interstate  shareholders are governed  by the First
Interstate Certificate,  the  First  Interstate Bylaws  (the  "First  Interstate
Bylaws")  and the laws of the State  of Delaware. The rights of FBS shareholders
are governed by the FBS Certificate, the  FBS bylaws (the "FBS Bylaws") and  the
laws of the State of Delaware.

   
    After  the Effective Time,  the rights of  First Interstate shareholders who
become shareholders  of  New First  Interstate,  will  be governed  by  the  FBS
Certificate,  as amended in accordance with the Merger Agreement, the FBS Bylaws
and the  laws of  the State  of  Delaware. The  following is  a summary  of  the
material  differences between the  rights of holders  of First Interstate Common
Stock and First  Interstate Preferred Stock  and those of  holders of New  First
Interstate  Common Stock and New First Interstate Preferred Stock. The following
does not purport  to be a  complete description of  the differences between  the
rights  of  First  Interstate  and FBS  shareholders.  Such  differences  may be
determined in full  by reference to  the First Interstate  Certificate, the  FBS
Certificate, the First Interstate By-laws, the FBS By-laws, the First Interstate
Rights Agreement and the FBS Rights Agreement.
    

    ACTION  BY  WRITTEN  CONSENT.   The  DGCL  provides  that,  unless otherwise
provided  in  the  certificate  of  incorporation  of  a  Delaware  corporation,
shareholders  may act by the written consent of the holders of not less than the
minimum number of shares  that would be  necessary to approve  such action at  a
meeting  where all  shares entitled  to vote were  present and  voted. The First
Interstate Certificate of  Incorporation does not  provide otherwise. The  First
Interstate Bylaws require that any shareholder

                                       95
<PAGE>
seeking  to have  the shareholders take  action by written  consent must provide
notice requesting  the First  Interstate Board  to  fix a  record date  for  the
purpose of determining the shareholders entitled to provide such consents.

    The  FBS Certificate provides  that FBS shareholders may  not act by written
consent. Accordingly, all  action to be  taken by FBS  shareholders may only  be
taken at duly called annual or special meeting.

    QUORUM  AT SHAREHOLDERS' MEETINGS.  The First Interstate Bylaws provide that
the holders of a majority of  the issued and outstanding capital stock  entitled
to  vote at a meeting, present in person  or by proxy, shall constitute a quorum
for purposes of such a meeting. The  FBS Bylaws require that the holders of  not
less  than one-third of the shares entitled to vote at any shareholders' meeting
be present, in person or by proxy, to constitute a quorum.

    NOTICE OF SHAREHOLDER NOMINATIONS FOR DIRECTOR.  The FBS Bylaws require that
any shareholder nominating a person for election as a director must give written
notice to the secretary  of the corporation  not less than 90  days prior to  an
annual  meeting of shareholders  or not less  than seven days  after the date on
which notice of a special meeting of shareholders for the election of  directors
is  given.  Under  the  First  Interstate  Bylaws,  a  shareholder's  notice for
nominations of persons for election to the Board must be given not less than  30
days  nor more than 60  days prior to the meeting,  unless less than forty days'
notice of the meeting  was given to shareholders,  in which case the  nomination
must be given within 10 days following the mailing of the notice of meeting.

    NOTICE  OF  SHAREHOLDER BUSINESS  PROPOSALS.   The  First  Interstate Bylaws
provide that a shareholder seeking to  properly bring business before an  annual
meeting of shareholders must deliver notice to the Secretary of First Interstate
not  less than 30 nor more than 60 days prior to the date of the annual meeting,
unless less  than  40  days' notice  of  the  meeting date  is  given  to  First
Interstate shareholders, in which case the business proposal must be received by
First  Interstate  no later  than 10  days  following the  date such  notice was
delivered to shareholders.

    The  FBS  Bylaws  contain  no   advance  notice  requirements  relating   to
shareholder proposals for business to be conducted at a shareholders' meeting.

    SPECIAL  MEETINGS OF SHAREHOLDERS.  The First Interstate Bylaws provide that
a special meeting of First Interstate shareholders may be called by the Chairman
of the Board, and shall  be called at the  request, in writing, of  shareholders
owning  a majority of the outstanding shares  entitled to vote or at the request
in writing of  a majority  of the  Board. The  FBS Bylaws  provide that  special
meetings  of FBS shareholders may  only be called by the  FBS Board or the chief
executive officer of FBS.

    CLASSIFICATION OF BOARD.  The FBS Certificate provides for classification of
the FBS Board into three classes of directors with each class as nearly equal in
number as possible and elected for a three-year term and only one class standing
for election each  year. The  affirmative vote  of the  holders of  at least  80
percent  of the outstanding voting  stock of FBS is  required to amend or repeal
this provision.

    The  First  Interstate   Bylaws  provide  that   the  number  of   directors
constituting  the First Interstate Board  shall be such number  as is fixed from
time to time  by resolution  adopted by the  First Interstate  Board. The  First
Interstate  Board  is not  classified,  and each  of  its directors  are elected
annually for one-year terms.

    VACANCIES AND  NEWLY-CREATED DIRECTORSHIPS.    The First  Interstate  Bylaws
provide  that any  vacancy in the  First Interstate Board  and any newly-created
directorships resulting  from any  increase in  the authorized  number of  First
Interstate  directors may be filled either by a majority of the First Interstate
directors then in office, though less than a quorum, or by the First  Interstate
shareholders.

    The  FBS Certificate provides that vacancies and newly-created directorships
resulting from an increase in the number  of FBS directors shall be filled  only
by  a majority of the directors then in  office, although less than a quorum, or
by a  sole remaining  director.  The FBS  Certificate  also provides  that  such
provision may not be amended or repealed unless approved by the affirmative vote
of holders of not less than 80% of the outstanding voting stock of FBS.

                                       96
<PAGE>
    REMOVAL  OF DIRECTORS.   The First Interstate  Certificate provides that the
First Interstate  shareholders  may  by  a majority  vote  of  the  shareholders
entitled  to vote at any  annual or special meeting  thereof remove any director
for any  cause deemed  sufficient. Under  the FBS  Certificate shareholders  may
remove a director only for cause.

    SUPERMAJORITY VOTING.  The FBS Certificate provides for supermajority voting
requirements  in connection with certain  "Business Transactions" (as defined in
the FBS  Certificate), involving  a  "Related Person"  (as  defined in  the  FBS
Certificate). The supermajority shareholder vote is not required if the Business
Transaction  meets certain fair  price criteria or in  the event the "Continuing
Directors" (as  defined in  the FBS  Certificate) approve  the transaction.  The
affirmative  vote of at least  80% of the outstanding  shares of FBS entitled to
vote generally  in the  election of  directors  is required  to approve  such  a
transaction  under the  FBS Certificate. The  FBS Certificate  also requires the
vote of the holders  of 80% of  the outstanding shares entitled  to vote in  the
election  of directors,  to add  to, alter,  change or  repeal the supermajority
provisions. The First Interstate Certificate contains no such provisions.

    MATERIAL DIFFERENCES IN RIGHTS AGREEMENTS.  The FBS Rights Agreement  (which
is described in "Description of FBS and First Interstate Capital Stock -- Common
Stock -- Preferred Stock Purchase Rights") and the Rights Agreement, dated as of
November 21, 1988, as amended (the "First Interstate Rights Agreement"), between
First Interstate and First Interstate Bank, Ltd., as rights agent (a description
of  which is  incorporated herein by  reference under  "Incorporation of Certain
Documents  by  Reference"),  contain  substantially  similar  terms.  The  First
Interstate   Rights  Agreement  provides  that  the  rights  to  purchase  First
Interstate Common Stock issued pursuant thereto (the "First Interstate  Rights")
will  expire  on December  31,  1998 (subject  to  extension), unless  the First
Interstate Rights are earlier redeemed by First Interstate. Pursuant to the  FBS
Rights  Agreement, the  FBS Rights will  expire on  the earlier of  (a) the date
which is 24 months after the first date upon which FBS can generally be acquired
by bank  holding companies,  and FBS  is generally  permitted to  acquire  banks
principally  located  in at  least  fifteen of  the  twenty states  which  as of
September 30, 1992 had the  largest amount of bank  deposits, or (b) January  4,
1999, unless the FBS Rights have previously been redeemed by FBS, or unless such
date is extended.

   
    GENERAL.   The foregoing discussion  of certain material differences between
the rights of First Interstate shareholders  and the rights of FBS  shareholders
under  their respective  Certificates and  Bylaws is  only a  summary of certain
provisions thereof and  does not purport  to be a  complete description of  such
similarities  and  differences. The  foregoing  discussion is  qualified  in its
entirety by reference to the full texts of the Certificates and Bylaws of  First
Interstate  and FBS. Such  Certificates and Bylaws are  filed or incorporated by
reference as exhibits to  the Registration Statement of  which this Joint  Proxy
Statement/Prospectus is a part.
    

DIVIDENDS

    The  Merger Agreement provides that FBS and First Interstate will coordinate
the declaration and  payment of  dividends in respect  of FBS  Common Stock  and
First  Interstate Common Stock, it being the  intent of FBS and First Interstate
that holders  of FBS  Common Stock  or First  Interstate Common  Stock will  not
receive  more than one dividend, or fail to receive one dividend, for any single
calendar quarter in which they would otherwise receive a dividend in the absence
of the Merger.

   
                            FIRST BANK SYSTEM, INC.
    

   
BUSINESS OF FBS
    

   
    FBS is  a  regional  bank  holding  company  headquartered  in  Minneapolis,
Minnesota. As of September 30, 1995, FBS was comprised of eight banks, a savings
association and other financial companies with 350 offices, located primarily in
the  11 states  of Minnesota, Colorado,  Illinois, Montana,  North Dakota, South
Dakota, Wisconsin, Iowa, Nebraska, Kansas and Wyoming. Through its subsidiaries,
    

                                       97
<PAGE>
FBS provides  commercial  and  agricultural finance,  consumer  banking,  trust,
capital  markets, treasury  management, investment  management, data processing,
leasing, mortgage banking and brokerage services. At September 30, 1995, FBS and
its  consolidated  subsidiaries  had  consolidated  assets  of  $33.0   billion,
consolidated deposits of $21.9 billion and shareholders' equity of $2.7 billion.

    The  subsidiary banks of FBS engage  in general commercial banking business,
principally in domestic markets, and  provide banking and ancillary services  to
individuals,  businesses, institutional organizations, governmental entities and
other financial institutions. The largest  subsidiary bank, First Bank  National
Association ("FBNA"), had assets of $15.4 billion at September 30, 1995.

    FBS is a legal entity separate and distinct from its banking and non-banking
affiliates.  The principal sources  of FBS's income  are dividends, interest and
fees from FBNA and  the other banking and  non-banking affiliates. The bank  and
thrift  subsidiaries of FBS  (the "Banks"), are  subject to certain restrictions
imposed by  federal  law on  any  extensions of  credit  to, and  certain  other
transactions with, FBS and certain other affiliates; and on investments in stock
or  other  securities  thereof. Such  restrictions  prevent FBS  and  such other
affiliates from borrowing from the Banks unless the loans are secured by various
types of  collateral.  Further,  such  secured  loans,  other  transactions  and
investments by any of the Banks are generally limited in amount as to FBS and as
to  each of such other affiliates to 10%  of such Bank's capital and surplus and
as to FBS and all of such other affiliates to an aggregate of 20% of such Bank's
capital and surplus. In addition, payment of dividends to FBS by the  subsidiary
banks  is subject  to ongoing  review by  regulators and  is subject  to various
statutory  limitations  and  in  certain  circumstances  requires  approval   by
regulatory authorities.

    FBS  was incorporated  under Delaware  law in 1929  and has  functioned as a
multi-bank holding company since that time. Its principal executive offices  are
located  at First  Bank Place, 601  Second Avenue  South, Minneapolis, Minnesota
55402-4302 (telephone (612) 973-1111).  For further information concerning  FBS,
see  the  FBS  documents incorporated  by  reference herein  as  described under
"Incorporation of Certain Documents by Reference."

   
FBS STOCK REPURCHASE PROGRAM
    

   
    FBS has  had  a  continuing, publicly  announced  stock  repurchase  program
throughout  1993, 1994 and 1995.  As publicly reported in  its Annual Reports on
Form 10-K for  the years  ended December  31, 1993  and December  31, 1994,  FBS
repurchased  6.2 and 6.3  million shares of  FBS Common Stock  in 1993 and 1994,
respectively. In addition, FBS  announced on January 19,  1995 and February  15,
1995  that it  intended to  repurchase 2  million and  14 million  shares of FBS
Common Stock, respectively, by the end of 1996. These programs were subsequently
described in  FBS's Quarterly  Reports on  Form 10-Q  for the  first and  second
quarters of 1995 and in its press releases announcing financial results for such
periods.  More recently, on October 10, 1995,  FBS further announced that it had
repurchased 4.3 million  shares in  the third quarter  of 1995  pursuant to  its
repurchase  programs  and special  repurchases in  connection with  the FirsTier
Acquisition. FBS  further announced  that it  expected to  repurchase up  to  an
aggregate  of 24.3  million shares  during 1995  and 1996  as a  result of these
previously announced stock repurchase programs.
    

   
    FBS reconfirmed its intention to continue such stock repurchases on November
6, 1995, in  conjunction with its  announcement of the  Merger Agreement and  in
subsequent  filings  made with  the Commission  with respect  to the  Merger. As
publicly reported in FBS's 1995 Quarterly Reports on Form 10-Q, FBS  repurchased
1,040,475,  2,644,410 and  4,306,620 shares  of FBS  Common Stock  in the first,
second and third quarters of 1995, respectively.
    

   
    For independent business  and accounting  reasons relating  to the  FirsTier
Acquisition,  FBS decided to repurchase shares  of FBS Common Stock, as publicly
announced. Prior  to entering  into the  Merger Agreement,  FBS had  planned  to
repurchase  approximately 3,675,000  shares during  the fourth  quarter of 1995,
representing  a  reduction  from  the   original  target  of  3,975,000   shares
corresponding  to  greater  than  targeted  repurchases  in  the  third quarter.
However, upon entering into the Merger Agreement, the fourth quarter target  was
increased    to   4,500,000   shares    to   take   into    account   the   fact
    

                                       98
<PAGE>
   
that new cooling-off periods associated  with the Merger would further  restrict
the number of trading days in 1996 which would be available for FBS's previously
planned share repurchases. FBS repurchased         shares of FBS Common Stock in
the  fourth  quarter  of 1995  and  has, as  of  the  date of  this  Joint Proxy
Statement/Prospectus, repurchased an additional         shares in 1996.
    

   
    FBS strictly  adheres to  the antimanipulation  rules of  the Commission  in
making  all of its share repurchases. One  of these rules provides a safe harbor
against any claim of  stock price manipulation if  the purchases are limited  in
terms of timing, manner of execution and other factors. In accordance with these
rules,  FBS does not make any purchases on an "uptick," uses only one broker for
such purchases and its purchases  (excluding block purchases) do not  constitute
more  than one-quarter  of the  daily volume.  The Commission's  rules expressly
exempt  block  purchases  from  the  volume  limitations  of  the  safe   harbor
provisions, presumably on the basis that block purchases do not present the same
market  manipulation concerns as do purchases  in smaller quantities. Another of
these rules limits the  time periods during which  the repurchases must be  made
and  expressly  prohibits  repurchases  during  the  pendency  of  merger  proxy
solicitations. AS A  RESULT, FBS WILL  NOT PURCHASE SHARES  OF FBS COMMON  STOCK
DURING THE PERIOD COMMENCING TWO TRADING DAYS PRIOR TO THE MAILING OF THIS JOINT
PROXY  STATEMENT/PROSPECTUS  AND  ENDING ON  THE  DATE OF  THE  FIRST INTERSTATE
SPECIAL MEETING. In imposing these cooling-off limitations, the rules  expressly
contemplate  that  an  issuer  engaged  concurrently  in  share  repurchases and
stock-for-stock mergers will be required to concentrate its share repurchases to
a limited number of trading days, during which repurchase volumes often will  be
higher  than  they otherwise  would be  if the  cooling-off limitations  did not
apply.
    

   
    As a  result of  the application  of the  Commission rules  to the  FirsTier
Acquisition  and two other acquisitions by FBS,  FBS was not permitted to engage
in share repurchases during a significant portion of the first three quarters of
1995. Moreover,  because of  these rules,  FBS was  unable to  make  repurchases
during  most of October and  December of 1995 and  expects to be prohibited from
making repurchases for a portion of January 1996 during the solicitation  period
for  the FirsTier Acquisition and will not be permitted to repurchase shares for
a period of at  least one month  prior to the  First Interstate Special  Meeting
with  respect to the Merger.  FBS also did not  engage in repurchases during the
first week of November 1995  because of the events  leading to the execution  of
the Merger Agreement on November 6.
    

   
    FBS  believes that its active share repurchase programs provide an effective
long-term means of implementing  FBS's capital management  goal of returning  to
its   stockholders  excess  capital  that   may  result  from  future  earnings.
Repurchases are assumed  in the  forecasted results describing  the Merger.  FBS
will  not, however, purchase  treasury shares under  its existing authorizations
within 90 days after consummation of the Merger.
    

   
    The chart set forth below shows, for  each day from October 1, 1995  through
           ,  1996, the trading day immediately prior  to the date of this Joint
Proxy Statement/Prospectus, the  number of  shares purchased  by FBS  (including
shares  purchased in block transactions), the total trading volume in FBS Common
Stock, and the  total daily purchases  by FBS in  transactions other than  block
transactions.  In addition,  set forth as  an Exhibit 99.12  to the Registration
Statement is a detailed trading record showing the same information with respect
to the purchases of  FBS Common Stock made  by FBS for each  day 1995 (the  "FBS
Repurchase  Chart"). Each person, including any beneficial owner, to whom a copy
of this Joint Proxy Statement/Prospectus is  delivered may obtain a copy of  the
FBS Repurchase Chart from FBS, without charge, by following the instructions set
forth under "Incorporation of Certain Documents by Reference."
    

   
<TABLE>
<CAPTION>
                                  NUMBER OF SHARES                      TOTAL
                                      PURCHASED          TOTAL        PURCHASES
                                     (INCLUDING         TRADING      IN NON-BLOCK   WEIGHTED AVERAGE
DATE                             BLOCK TRANSACTIONS)     VOLUME      TRANSACTIONS      PRICE PAID
- -------------------------------  -------------------  ------------  --------------  ----------------

<S>                              <C>                  <C>           <C>             <C>
</TABLE>
    

                                       99
<PAGE>
   
                            FIRST INTERSTATE BANCORP
    

    First Interstate is a bank holding company registered under the BHC Act, and
conducts  a  commercial banking  business through  its bank  subsidiaries. First
Interstate was incorporated under  the laws of the  State of Delaware and  began
operations  in 1958.  At September  30, 1995,  First Interstate,  through its 16
subsidiary banks (the "Subsidiary Banks"), operated approximately 1,150  banking
offices in 13 states.

    At  September 30, 1995,  First Interstate and  its consolidated subsidiaries
had total assets of  $55.1 billion, consolidated deposits  of $48.2 billion  and
shareholders'  equity of  $4.0 billion. At  that date, First  Interstate was the
fourteenth largest commercial banking organization  in the United States  ranked
by total assets.

    The  Subsidiary  Banks  accept  checking,  savings  and  other  time deposit
accounts and employ these funds by making principally consumer, real estate  and
commercial  loans and investing in securities and other interest bearing assets.
All of their deposit accounts  are insured by the  FDIC, all but three  exercise
trust  powers, and the thirteen national banks  and one of the three state banks
are members of the Federal Reserve  System. The larger Subsidiary Banks  provide
international banking services throughout the international departments of their
domestic  offices  and through  a business  development agreement  between First
Interstate Bank of  California and  Standard Chartered PLC.  They also  maintain
correspondent relationships with major banks throughout the world.

    First  Interstate  also  provides  banking-related  financial  services  and
products. These include asset-based  commercial financing, asset management  and
investment  counseling, bank card operations,  mortgage banking, venture capital
and investment  products.  It  engages  in  these  activities  through  non-bank
subsidiaries  of  First Interstate,  through  the Subsidiary  Banks  and through
subsidiaries of the Subsidiary Banks.

    The largest of the Subsidiary Banks, First Interstate Bank of California,  a
California  state-chartered  bank,  had  total  assets  of  approximately  $24.8
billion, total deposits of approximately $21.2 billion and shareholder's  equity
of approximately $2.0 billion at September 30, 1995.

    Additional  information  about  First  Interstate  and  its  subsidiaries is
included  in  documents   incorporated  by   reference  in   this  Joint   Proxy
Statement/Prospectus. See "Incorporation of Certain Documents by Reference."

           DESCRIPTION OF FBS AND NEW FIRST INTERSTATE CAPITAL STOCK

   
    The following is a description of the material features of the capital stock
of FBS. This description does not purport to be complete and is qualified in its
entirety by reference to the FBS Certificate, the certificate of designation for
each series of preferred stock of FBS, and the agreements and documents referred
to  below  under"-- Common  Stock --  Preferred Stock  Purchase Rights"  and "--
Periodic Stock Purchase  Rights and Risk  Event Warrants," copies  of which  are
incorporated  by reference  as exhibits to  the Registration  Statement of which
this Joint Proxy Statement/Prospectus is a part.
    

GENERAL

   
    The authorized capital stock  of FBS consists of  200,000,000 shares of  FBS
Common  Stock, par  value $1.25  per share,  and 10,000,000  shares of preferred
stock, par  value $1.00  per share  ("preferred stock  of FBS").  Under the  FBS
Certificate, the FBS Board or a duly authorized committee thereof has the power,
without  further  action  by  the shareholders,  unless  action  is  required by
applicable laws or regulations or by the terms of outstanding preferred stock of
FBS, to provide for the issuance of preferred stock in one or more series and to
fix the voting rights,  designations, preferences, and relative,  participating,
optional   or  other   special  rights,   and  qualifications,   limitations  or
restrictions thereof  by  adopting  a resolution  or  resolutions  creating  and
designating  such series. As of September  30, 1995, there were 2,095,800 shares
of  preferred  stock  of  FBS  outstanding,  having  an  aggregate   liquidation
preference  of  $104,790,000, and  1,412,750 shares  of  preferred stock  of FBS
reserved for
    

                                      100
<PAGE>
issuance. At September  30, 1995, 135,632,324  shares of FBS  Common Stock  were
issued  (including  6,202,961 shares  held in  treasury), 7,680,088  shares were
reserved for issuance under the FBS employee plans and the FBS Reinvestment  and
Purchase  Plan, 3,616,512 shares  were reserved for  issuance upon conversion of
the FBS 1991A Preferred Stock, and 15,000,000 shares were reserved for  issuance
upon  exercise of  the Periodic  Stock Purchase  Rights and  Risk Event Warrants
described below.

    The FBS Board has approved a proposed amendment to the FBS Certificate  that
would  increase  the  number  of  authorized shares  of  FBS  Common  Stock from
200,000,000 to 500,000,000 and would increase the number of authorized shares of
preferred stock of FBS from 10,000,000 to 15,000,000. The increase in the number
of authorized shares of FBS Common Stock is necessary to have sufficient  shares
available  for  consummation  of  the  Merger,  in  connection  with  which  FBS
anticipates issuing up to 207,480,000 shares of FBS Common Stock. The FBS  Board
further  believes that  the authorization  of additional  shares of  FBS capital
stock is advisable  to provide FBS  additional common and  preferred shares  for
general  corporate  purposes,  including  stock  dividends,  raising  additional
capital, issuances pursuant to employee and shareholder stock plans and possible
future acquisitions. See "Amendment to FBS Certificate."

PREFERRED STOCK

    GENERAL.   FBS  presently has  one  series  of preferred  stock  issued  and
outstanding  and two series  of preferred stock  authorized for future issuance.
The FBS 1991A Preferred Stock, which  is issued and outstanding, and the  Series
1990A  Preferred  Stock, liquidation  value  $100,000 per  Share  ("Series 1990A
Preferred Stock"). The  Series 1990A  Preferred Stock is  authorized for  future
issuance  as described below and ranks on  a parity with the FBS 1991A Preferred
Stock. The Series A Junior Participating Preferred Stock (the "Junior  Preferred
Stock"),  which  is authorized  for future  issuance  as described  below, ranks
junior to the other two series of preferred stock of FBS.

    SERIES 1990A  PREFERRED  STOCK.   In  connection with  the  sale by  FBS  of
12,600,000  shares of FBS Common Stock  and accompanying periodic stock purchase
rights and risk  event warrants in  a private  placement in July  1990, FBS  may
under  certain circumstances be obligated to issue up to 12,750 shares of Series
1990A Preferred  Stock. See  "-- FBS  Common Stock  -- Periodic  Stock  Purchase
Rights  and Risk  Event Warrants"  below. The  shares of  Series 1990A Preferred
Stock would, if  issued, provide for  a liquidation preference  of $100,000  per
share.  The dividend rate would be adjusted quarterly and would be determined at
the time of issuance. If, at the time of any annual meeting of shareholders  for
the  election of directors,  the amount of  accrued but unpaid  dividends on the
Series 1990A Preferred Stock were equal  to at least six quarterly dividends  on
such  series, then the number of directors of  FBS would be increased by one and
the holders of such  Series, voting as  a separate class,  would be entitled  to
elect  one additional  director who  would continue to  serve the  full term for
which he or  she would  have been  elected, notwithstanding  the declaration  or
payment  of any dividends on the Series 1990A Preferred Stock. Holders of Series
1990A Preferred  Stock  would  not  have any  other  voting  rights,  except  as
described under "-- Preferred Stock Voting Rights" below.

    FBS  1991A  PREFERRED STOCK.    In November  1991,  FBS issued  in  a public
offering 2,290,000 shares of its FBS 1991A Preferred Stock and 2,095,800 of such
shares remained outstanding at September 30,  1995. Such shares bear a  dividend
rate  of 7.125% per annum of the liquidation preference per share. The shares of
FBS 1991A Preferred Stock  are convertible at  the option of  the holder at  any
time at the rate of 1.7256 shares of FBS Common Stock for each such share, which
is  equivalent to a conversion  price of $28.975 per  share of FBS Common Stock.
The conversion rate is  subject to adjustment upon  the occurrence of  specified
events.  The shares of FBS 1991A Preferred  Stock are not subject to any sinking
fund provisions  and  have no  preemptive  rights.  Such shares  provide  for  a
liquidation  preference of $50 per share  plus accrued and unpaid dividends, and
are subject to redemption, upon at least 30 days notice, at the option of FBS at
any time on or after January 1, 1996 at a redemption price equal to $52.1375 per
share, declining to $50 per share on or after January 1, 2002, plus in each case
accrued and unpaid dividends;  provided, however, that the  shares of FBS  1991A

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Preferred  Stock are not  redeemable in part  in the event  that full cumulative
dividends have not been paid. Holders of  FBS 1991A Preferred Stock do not  have
any  voting rights, except as described under "-- Preferred Stock Voting Rights"
below.

    JUNIOR PREFERRED STOCK.   FBS has issued  the FBS Rights  to holders of  FBS
Common  Stock entitling  such holders,  under specified  conditions, to purchase
Junior Preferred Stock of FBS. See "-- Common Stock -- Preferred Stock  Purchase
Rights"  below. If  issued, each  share of Junior  Preferred Stock  would have a
minimum liquidation  preference  of  $100  per share  plus  accrued  and  unpaid
dividends and would be entitled to an aggregate payment equal to the liquidation
payment  made on  100 shares  of FBS  Common Stock.  In addition,  each share of
Junior Preferred  Stock would  have a  minimum preferential  quarterly  dividend
payment  of $1.00 per share but would  be entitled to an aggregate payment equal
to the dividends  declared on  100 shares  of FBS  Common Stock.  The shares  of
Junior  Preferred Stock would not be entitled to the benefit of any sinking fund
and would not be redeemable. Each share of Junior Preferred Stock would have 100
votes and would vote together with the FBS Common Stock.

    PREFERRED STOCK VOTING RIGHTS.  The following voting provisions apply to all
series of the preferred stock of FBS other than the Junior Preferred Stock.  The
voting  rights  of the  Junior Preferred  Stock,  and certain  additional voting
rights of the Series 1990A Preferred Stock, are described above under "-- Series
1990A Preferred Stock" and "-- Junior Preferred Stock."

    If, at the time of  any annual meeting of  shareholders for the election  of
directors,  the amount of accrued but unpaid dividends on any preferred stock of
FBS is equal to  at least six  quarterly dividends on  such series of  preferred
stock  of FBS, the number of  the directors of FBS will  be increased by two and
the holders of all outstanding series  of preferred stock of FBS (excluding  the
Series  1990A  Preferred Stock),  voting  as a  single  class without  regard to
series, will  be entitled  to  elect such  additional  two directors  until  all
dividends  in default on all  preferred stock of FBS  have been paid or declared
and set apart for payment.

    The affirmative vote or consent of the holders of at least two-thirds of the
outstanding shares of  any series of  the preferred  stock of FBS,  voting as  a
class,  will be required for any amendment of the FBS Certificate (including any
certificate of designation  or any similar  document relating to  any series  of
preferred  stock of  FBS) which will  adversely affect  the powers, preferences,
privileges or rights of such series of preferred stock. The affirmative vote  or
consent  of the holders of at least  two-thirds of the outstanding shares of any
series of preferred stock  of FBS, voting  as a single  class without regard  to
series,  will be required to issue, authorize, or increase the authorized amount
of, or  issue  or authorize  any  obligation  or security  convertible  into  or
evidencing  a right to purchase, any additional class or series of stock ranking
prior to such series of preferred stock as to dividends or upon liquidation.

    ADDITIONAL PROVISIONS.  The  rights of holders of  FBS Common Stock will  be
subject  to, and  may be  adversely affected  by, the  rights of  holders of any
preferred stock  that  may  be issued  in  the  future. Any  such  issuance  may
adversely  affect the interests of  holders of the FBS  Common Stock by limiting
the control that such holders may exert  by exercise of their voting rights,  by
subordinating  their rights in liquidation  to the rights of  the holders of the
preferred stock of  FBS and otherwise.  In addition, the  issuance of shares  of
preferred  stock of FBS may, in some circumstances, deter or discourage takeover
attempts and other changes in control of FBS, including takeovers and changes in
control that some holders of the FBS Common  Stock may deem to be in their  best
interests  and in the best  interests of FBS, by making  it more difficult for a
person who has  gained a  substantial equity interest  in FBS  to obtain  voting
control  or  to  exercise  control  effectively. FBS  has  no  current  plans or
agreements with respect to the issuance of any shares of preferred stock, except
as described  above with  respect to  the Series  1990A Preferred  Stock and  in
connection with the consummation of the Merger.

    The  FBS Certificate requires the affirmative vote  of the holders of 80% of
the "Voting  Stock" (as  defined therein)  of FBS  to approve  certain  mergers,
consolidations,   reclassifications,  dispositions  of  assets  or  liquidation,
involving or proposed by certain significant shareholders, unless certain  price

                                      102
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and procedural requirements are met or unless the transaction is approved by the
"Continuing  Directors" (as defined  therein). In addition,  the FBS Certificate
provides for classification  of the FBS  Board into three  separate classes  and
authorizes  action by the shareholders of FBS only pursuant to a meeting and not
by a  written  consent. The  Bylaws  of FBS  provide  that special  meetings  of
shareholders may be called only by the FBS Board or the chief executive officer.
The  overall effect of these  provisions may be to  delay or prevent attempts by
other corporations or groups to acquire control of FBS without negotiation  with
the FBS Board.

COMMON STOCK

   
    GENERAL.   Each share of  FBS Common Stock is  entitled to such dividends as
may from  time to  time be  declared by  the FBS  Board from  any funds  legally
available  for dividends. FBS may not declare any cash dividends on, or make any
payment on account  of, the  purchase, redemption  or other  retirement of,  FBS
Common   Stock  unless  full  dividends  (including  accumulated  dividends,  if
applicable) have  been  paid or  declared  or set  apart  for payment  upon  all
outstanding shares of the preferred stock of FBS and FBS is not in default or in
arrears  with respect to any sinking or  other analogous fund or other agreement
for the purchase,  redemption or  other retirement  of any  shares of  preferred
stock  of FBS. Holders of  FBS Common Stock are entitled  to one vote per share.
Shareholders do not have the  right to cumulate their  votes in the election  of
directors.  FBS Common  Stock has  no conversion rights  and the  holders of FBS
Common Stock have  no preemptive  or other  rights to  subscribe for  additional
securities  of FBS. In the event of the liquidation of FBS, after the payment or
provision for payment of all debts and liabilities and subject to the rights  of
the  holders of preferred stock of FBS  which may be outstanding, the holders of
FBS Common Stock will be  entitled to share ratably  in the remaining assets  of
FBS. Shares of FBS Common Stock are fully paid and nonassessable, and the shares
of FBS Common Stock to be issued to the holders of First Interstate Common Stock
in  the Merger  will, when issued,  be legally  issued. The FBS  Common Stock is
listed on the NYSE.
    

    PREFERRED STOCK  PURCHASE RIGHTS.    On December  21,  1988, the  FBS  Board
declared  a dividend of one  preferred share purchase right  (a "FBS Right") for
each outstanding share of FBS Common Stock. The dividend was paid on January  4,
1989  to the FBS shareholders  of record on that date.  Each holder of shares of
New First Interstate Common  Stock issued upon consummation  of the Merger  will
receive  one New First Interstate  Right for each share  of New First Interstate
Common Stock.

    Each FBS Right initially entitles the registered holder to purchase from FBS
one one-hundredth of  a share of  Junior Preferred Stock  of FBS at  a price  of
$80.00, subject to adjustment (the "Purchase Price"). The FBS Rights are not and
will  not be exercisable  or represented by separate  certificates until 10 days
following the  earlier  of a  public  announcement that  a  person or  group  of
affiliated or associated persons (an "Acquiring Person") has acquired beneficial
ownership  of 20% or more of the outstanding  shares of FBS Common Stock or have
commenced or announced an intention to make a tender offer or exchange offer for
20% or more of such outstanding shares of FBS Common Stock (the earlier of  such
dates  being called the  "Distribution Date"). In  the event that  any person or
group of affiliated or associated persons becomes the beneficial owner of 20% or
more of the outstanding shares of FBS  Common Stock, each FBS Right (other  than
any  FBS Right  held by a  person or  group of affiliated  or associated persons
beneficially owning 20% or more of  the outstanding shares of FBS Common  Stock,
which  FBS Rights will thereafter be void) will thereafter entitle the holder to
receive upon exercise that number of shares of FBS Common Stock having a  market
value  of twice the  Purchase Price. In  addition, in such  event, the FBS Board
will thereafter be entitled to exchange  the outstanding FBS Rights (other  than
any  FBS Right held by an Acquiring  Person, which FBS Right shall thereafter be
void), in whole or in part, for  shares of FBS Common Stock or Junior  Preferred
Stock  at  an  exchange  ratio  of  one  share  of  FBS  Common  Stock,  or  one
one-hundredth of a share of Junior Preferred Stock, per FBS Right. In connection
with the execution of the Merger Agreement, FBS amended the FBS Rights Agreement
to, among other things, provide that the execution and delivery of the FBS Stock
Option Agreement and the  transactions contemplated thereby  will not cause  the
FBS  Rights to  be distributed  or become  exercisable. See  " --  Amendments to
Rights Agreements."

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<PAGE>
    In the event that FBS is acquired in a merger or other business  combination
transaction or 50% or more of its consolidated assets or earning power are sold,
each  FBS Right will thereafter entitle the holder to receive upon exercise that
number of shares of common stock of the acquiring company having a market  value
of twice the Purchase Price.

    Prior  to the Distribution Date, the  FBS Rights cannot be transferred apart
from FBS  Common  Stock and  are  represented solely  by  the FBS  Common  Stock
certificates.  As soon as practicable  following the Distribution Date, separate
certificates representing the FBS Rights will be mailed to holders of record  of
shares  of FBS Common Stock as of such date, and the FBS Rights could then begin
to trade separately from FBS Common Stock.

    The FBS  Rights do  not  have any  voting rights  and  are not  entitled  to
dividends. The terms of the FBS Rights may be amended without the consent of the
holders,  provided  that,  after  a person  becomes  an  Acquiring  Person, such
amendment may not adversely affect the interests of the holders.

    The terms of the Junior Preferred Stock issuable upon exercise of FBS Rights
are described above under "-- Preferred Stock -- Junior Preferred Stock."

    The FBS Rights  are not  exercisable until  the Distribution  Date. The  FBS
Rights  will expire on the earlier of (a)  the date which is 24 months after the
first date upon which FBS can  generally be acquired by bank holding  companies,
and FBS is generally permitted to acquire banks, principally located in at least
fifteen  of the  twenty states which  as of  September 30, 1992  had the largest
amount of bank deposits or (b) January 4, 1999, unless, before that date, all of
the FBS Rights are either redeemed by FBS at a price of $.01 per FBS Right prior
to the acquisition by a person or  group of affiliated or associated persons  of
beneficial  ownership of  20% or  more of the  outstanding shares  of FBS Common
Stock, or  are  exchanged by  FBS  for shares  of  FBS Common  Stock  or  Junior
Preferred  Stock as described above. It  is currently anticipated that the first
date on which FBS can generally be  acquired by bank holding companies, and  FBS
is generally permitted to acquire banks, principally located in at least fifteen
of  the twenty states which  as of September 30, 1992  had the largest amount of
bank deposits will be in July 1996.

    The FBS Rights may  have certain anti-takeover effects.  The FBS Rights  may
cause  substantial dilution to an Acquiring Person if it attempts to merge with,
or engage in certain  other transactions with, FBS.  The FBS Rights should  not,
however, interfere with any merger or other business combination approved by the
FBS  Board prior  to the  occurrence of  the Distribution  Date because  the FBS
Rights may be redeemed prior to such time.

    The complete  terms of  the  FBS Rights  are set  forth  in the  FBS  Rights
Agreement.  The description of the FBS Rights  set forth herein does not purport
to be complete and is qualified in  its entirety by reference to the FBS  Rights
Agreement,  a copy of  which is incorporated  by reference as  an exhibit to the
Registration Statement of which this Joint Proxy Statement/Prospectus is a part.

    PERIODIC STOCK PURCHASE  RIGHTS AND RISK  EVENT WARRANTS.   FBS has  entered
into  (i)  a Stock  Purchase Agreement,  dated as  of May  30, 1990  (the "Stock
Purchase  Agreement"),  by  and  among  Corporate  Partners,  L.P.   ("Corporate
Partners"),  Corporate Offshore  Partners, L.P.  ("Offshore" and,  together with
Corporate Partners, the  "Partnerships"), The State  Board of Administration  of
Florida  ("State Board") solely in its capacity  as a managed account and not in
its individual  capacity (State  Board and  the Partnerships  being referred  to
herein  collectively as the "Purchasers"), Corporate  Advisors, L.P. and FBS and
(ii) a Stock Purchase Agreement,  dated as of May  30, 1990 (the "Florida  Stock
Purchase  Agreement"), by and between State Board in its individual capacity and
FBS. Pursuant  to  the Stock  Purchase  Agreement,  FBS sold  (a)  to  Corporate
Partners  8,856,241  shares of  FBS Common  Stock,  ten Periodic  Stock Purchase
Rights (each  a "PSPR")  and one  Risk Event  Warrant, (b)  to Offshore  643,976
shares  of FBS  Common Stock, ten  PSPRs and one  Risk Event Warrant  and (c) to
State Board 939,783 shares  of FBS Common  Stock, ten PSPRs  and one Risk  Event
Warrant.  Pursuant to  the Florida Stock  Purchase Agreement, FBS  sold to State
Board 2,160,000  shares  of FBS  Common  Stock, ten  PSPRs  and one  Risk  Event
Warrant. Effective as of May 30, 1990, FBS and First

                                      104
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Chicago  Trust Company of  New York entered  into Amendment No.  1 to the Rights
Agreement to  exclude the  acquisition of  shares  of FBS  Common Stock  by  the
Purchasers  and State  Board pursuant  to the  Stock Purchase  Agreement and the
Florida  Stock   Purchase   Agreement,  respectively,   and   the   transactions
contemplated  thereby and certain  other transactions from  the operation of the
Rights Agreement.  See "--  Common  Stock --  Preferred Stock  Purchase  Rights"
above.

    The  Stock  Purchase  Agreement  and the  Florida  Stock  Purchase Agreement
contain transfer restrictions  with respect to  the shares of  FBS Common  Stock
acquired  thereunder and standstill provisions  limiting further acquisitions of
FBS Common Stock by the Purchasers and State Board. The Stock Purchase Agreement
and the Florida Stock Purchase Agreement  also grant each of the Purchasers  and
State  Board the right to  purchase its pro rata  share of any Voting Securities
(as defined in the Stock  Purchase Agreement) sold by  FBS for cash, subject  to
certain  exceptions. Pursuant  to the  Stock Purchase  Agreement, the Purchasers
have designated one person to act as a non-voting observer of the FBS Board.

    Each PSPR issued  to the Purchasers  and State Board  relates to a  specific
twelve-month period commencing with the twelve-month period following closing of
the transactions contemplated under the Stock Purchase Agreement and the Florida
Stock Purchase Agreement. Each PSPR shall become exercisable in the event that a
Dividend  Shortfall (as defined in the  Stock Purchase Agreement) exists for the
specific twelve-month period to  which such PSPR  relates. A Dividend  Shortfall
will  be deemed to  exist to the  extent that FBS  has not paid  a cash dividend
equal to $0.205  per share  of FBS  Common Stock  for each  quarter within  such
twelve-month  period. The PSPRs will be exercisable for that number of shares of
FBS Common Stock or (subject to the prior approval of the Federal Reserve Board)
depositary shares representing  one one-thousandth  of a share  of Series  1990A
Preferred  Stock  ("Depositary  Shares") such  that  the holders  of  PSPRs will
receive  value  equal  to  the  Dividend  Shortfall.  Once  a  PSPR  has  become
exercisable,  it will  remain exercisable for  a one-year period  at an exercise
price of $1.25 per share of FBS Common Stock or $1.00 per Depositary Share. If a
PSPR were to become exercisable and were not redeemed by FBS as described below,
the issuance of Depositary Shares  or FBS Common Stock  upon exercise of a  PSPR
could  adversely affect the market  price of the FBS  Common Stock. If the PSPRs
were to be exercised for FBS  Common Stock, there could be substantial  dilution
of the FBS Common Stock.

    Each  Risk Event  Warrant shall become  exercisable in the  event of certain
defined change of control events with respect to FBS where the value received by
holders of the FBS Common  Stock is less than $13.875  per share, or in  certain
circumstances  in the event the FBS Common  Stock is valued at less than $13.875
per  share  on  the  tenth  anniversary  of  the  closing  of  the  transactions
contemplated  under the Stock Purchase Agreement. The Merger does not constitute
a change of  control for purposes  of the  Risk Event Warrants.  The Risk  Event
Warrants will be exercisable for that number of shares of FBS Common Stock at an
exercise  price of $1.25 per share or,  in certain circumstances (subject to the
prior approval of the  Federal Reserve Board), Depositary  Shares such that  the
holders  of Risk Event Warrants  will receive value equal  to such shortfall. If
the Risk Event Warrants were to become exercisable and were not redeemed by  FBS
as  described below, the issuance of Depositary  Shares or FBS Common Stock upon
exercise of a Risk Event Warrant could adversely affect the market price of  the
FBS Common Stock. If the Risk Event Warrants were to be exercised for FBS Common
Stock, there could be substantial dilution of the FBS Common Stock. In the event
of  a change in control at a time when  the market price of the FBS Common Stock
is less than $13.875 per share, the  Risk Event Warrants may have the effect  of
reducing  the price per  share to be received  by the holders  of the FBS Common
Stock.

    In the event of the exercise of a Risk Event Warrant upon the occurrence  of
certain  change of control events, FBS may,  at its option (subject to the prior
approval of the Federal  Reserve Board), elect to  have such Risk Event  Warrant
become  exercisable for other securities of FBS acceptable to the holder of such
Risk Event Warrant in lieu of the shares of FBS Common Stock for which such Risk
Event Warrant would otherwise become exercisable. In addition, FBS has the right
(subject to the prior approval of the Federal Reserve Board) to redeem any  PSPR
at a price equal to the Dividend

                                      105
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Shortfall and any Risk Event Warrant at a price equal to the Value Shortfall (as
defined in the Stock Purchase Agreement) or the Termination Shortfall Amount (as
defined in the Stock Purchase Agreement), as applicable, after such PSPR or Risk
Event  Warrant, as the case may be,  shall have become exercisable. FBS also has
entered into a registration rights agreement with the Purchasers and with  State
Board  pursuant  to  which the  Purchasers  and State  Board,  respectively, are
granted certain rights  to cause  FBS to register  with the  Commission the  FBS
Common  Stock acquired pursuant to the  Stock Purchase Agreement and the Florida
Stock Purchase Agreement and the securities acquired upon exercise of the  PSPRs
and the Risk Event Warrants.

    The  foregoing is  a summary of  the transactions contemplated  by the Stock
Purchase  Agreement  and  the  Florida  Stock  Purchase  Agreement  and  related
documents  and is  qualified in  its entirety  by the  more detailed information
contained in such agreements and documents, copies of which are incorporated  by
reference  as exhibits to  the Registration Statement of  which this Joint Proxy
Statement/Prospectus is a part.

NEW FIRST INTERSTATE PREFERRED STOCK

    The summary of terms of the  New First Interstate Preferred Stock  contained
herein  does not purport to be complete and  is subject to, and qualified in its
entirety  by,  the  provisions  of  the  FBS  Certificate  and  the   respective
Certificates of Designations of the New First Interstate Preferred Stock (each a
"Certificate  of  Designations")  which  have  been  filed  as  exhibits  to the
Registration Statement of which this Joint Proxy Statement/Prospectus is a  part
and are incorporated herein by reference.

NEW FIRST INTERSTATE 9.875% PREFERRED STOCK

    Pursuant  to  the  terms  of  the  Merger  Agreement,  each  share  of First
Interstate 9.875% Preferred Stock will be converted into one share of New  First
Interstate  9.875% Preferred  Stock. The  New First  Interstate 9.875% Preferred
Stock will be substantially  the same as the  First Interstate 9.875%  Preferred
Stock.

    RANK.  The New First Interstate 9.875% Preferred Stock will rank on a parity
as  to  payment  of  dividends  and  distribution  of  assets  upon dissolution,
liquidation or winding  up of  New First  Interstate with  each other  currently
outstanding  shares of preferred stock of FBS  and with the New First Interstate
9.0%  Preferred  Stock.  See  "Description  of  New  First  Interstate   Capital
Stock--Preferred  Stock." The New  First Interstate 9.875%  Preferred Stock will
rank prior to  the New First  Interstate Common Stock  and the Junior  Preferred
Stock  with respect to the payment of  dividends and distribution of assets upon
dissolution, liquidation or winding up of New First Interstate.

    DIVIDENDS.  Holders of shares of New First Interstate 9.875% Preferred Stock
will be  entitled  to  receive, when,  as  and  if declared  by  the  New  First
Interstate  Board, or a duly authorized committee  thereof, out of assets of New
First  Interstate  legally  available  for  payment,  cash  dividends,   payable
quarterly, at the rate of 9.875% per share per annum (equivalent to $2.46875 per
New  First Interstate 9.875%  Depositary Share per annum).  Dividends on the New
First Interstate 9.875% Preferred  Stock will be payable  quarterly on the  last
day  of March,  June, September  and December  of each  year (each,  a "Dividend
Payment Date"),  commencing on  the first  Dividend Payment  Date following  the
Effective  Time. Dividends payable on the  first Dividend Payment Date following
the Effective  Time  shall  be  in respect  of  the  quarterly  dividend  period
commencing  on and including the last dividend  payment date with respect to the
First Interstate 9.875% Preferred  Stock on which dividends  were paid prior  to
the Effective Time. Each declared dividend shall be payable to holders of record
as  they  appear at  the  close of  business  on the  stock  books of  New First
Interstate on such record  dates, not more than  60 calendar days preceding  the
payment  dates therefor,  as are determined  by the New  First Interstate Board.
Quarterly dividend periods shall  commence on and  include the Dividend  Payment
Date  and shall  end on and  include the  day next preceding  the next following
Dividend Payment  Date. The  right of  holders of  New First  Interstate  9.875%
Preferred Stock to receive dividends is cumulative.

    So long as any shares of the New First Interstate 9.875% Preferred Stock are
outstanding, no dividends shall be paid or declared upon any shares of any class
or series of stock of New First

                                      106
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Interstate  ranking on a  parity with the New  First Interstate 9.875% Preferred
Stock in the payment of dividends for any period unless, at or prior to the time
of such payment or declaration, (i) all cumulative dividends payable on the  New
First  Interstate 9.875% Preferred Stock for all dividend periods ended prior to
the date of such  payment or declaration  shall have been paid  and (ii) a  like
proportionate  dividend for the  same dividend period,  ratably in proportion to
the respective annual  dividend rates  fixed thereupon,  shall be  paid upon  or
declared  for the  New First Interstate  9.875% Preferred Stock  then issued and
outstanding.

    So long as any shares of the New First Interstate 9.875% Preferred Stock are
outstanding, no  full dividends  shall be  declared  or paid  or set  apart  for
payment  on the  preferred stock of  any series  ranking, as to  dividends, on a
parity with or junior to the New First Interstate 9.875% Preferred Stock for any
period unless  full  cumulative dividends  have  been or  contemporaneously  are
declared  and paid or declared and a  sum sufficient for the payment thereof set
apart for such payment  on the New First  Interstate 9.875% Preferred Stock  for
all dividend periods terminating on or prior to the date of payment of such full
cumulative dividends. When dividends are not paid in full upon the shares of New
First  Interstate 9.875% Preferred  Stock and the shares  of any other preferred
stock ranking on a parity as to  dividends with the New First Interstate  9.875%
Preferred  Stock, all  dividends declared  upon shares  of New  First Interstate
9.875% Preferred Stock and any other preferred  stock ranking on a parity as  to
dividends  shall be declared pro  rata so that the  amount of dividends declared
per share on  the New  First Interstate 9.875%  Preferred Stock  and such  other
preferred  stock  shall in  all cases  bear to  each other  the same  ratio that
accrued dividends  per  share on  the  shares  of New  First  Interstate  9.875%
Preferred  Stock and such other  preferred stock bear to  each other. Holders of
shares of New First  Interstate 9.875% Preferred Stock  will not be entitled  to
any  dividends, whether payable  in cash, property  or stock, in  excess of full
dividends, payable  as  herein provided,  on  the New  First  Interstate  9.875%
Preferred  Stock and no interest,  or sum of money in  lieu of interest, will be
payable in respect of any dividend  payment or payments of New First  Interstate
9.875%  Preferred  Stock which  may be  in  arrears. Except  as provided  in the
preceding sentence, unless  full dividends  on the New  First Interstate  9.875%
Preferred  Stock have  been declared  and paid  or set  apart for  payment for a
dividend period, no dividends (other than  in New First Interstate Common  Stock
or  another stock  ranking junior to  the New First  Interstate 9.875% Preferred
Stock as to dividends  and upon liquidation)  shall be declared  or paid or  set
aside  for payment  or other  distribution declared or  made upon  the New First
Interstate Common Stock or  on any other stock  of New First Interstate  ranking
junior to or on a parity with the New First Interstate 9.875% Preferred Stock as
to  dividends or  upon liquidation,  nor shall  any New  First Interstate Common
Stock nor any other stock of New First Interstate ranking junior to or on parity
with the New  First Interstate 9.875%  Preferred Stock as  to dividends or  upon
liquidation  be redeemed, purchased or  otherwise acquired for any consideration
(or any  moneys  be paid  to  or  made available  for  a sinking  fund  for  the
redemption  of any shares of any such  stock) by New First Interstate (except by
conversion into or exchange for stock of New First Interstate ranking junior  to
the  New  First  Interstate 9.875%  Preferred  Stock  as to  dividends  and upon
liquidation) unless, in each case, the full dividends on all outstanding  shares
of  New First Interstate 9.875% Preferred  Stock shall have been paid, including
dividends payable for all past dividend periods.

    Any dividend payment made on shares of New First Interstate 9.875% Preferred
Stock shall first be credited against  the earliest accrued but unpaid  dividend
due with respect to shares of such series which remains payable.

    REDEMPTION.   Prior  to November 15,  1996, the New  First Interstate 9.875%
Preferred Stock is not redeemable.  At any time on  or after November 15,  1996,
the  New First Interstate 9.875%  Preferred Stock is redeemable,  in whole or in
part, from time to time at the option of New First Interstate upon not less than
40 nor more than  70 days' notice (or  not less than 30  nor more than 60  days'
notice  in the  case of  the New First  Interstate 9.875%  Depositary Shares) at
$200.00 per  share  (equivalent  to  $25.00  per  New  First  Interstate  9.875%
Depositary  Share)  plus  all  accrued  and  unpaid  dividends  to  the  date of
redemption.

                                      107
<PAGE>
    If less  than all  the outstanding  shares of  New First  Interstate  9.875%
Preferred Stock are to be redeemed, New First Interstate will select those to be
redeemed  pro rata, by lot or by a substantially equivalent method. On and after
the redemption date,  dividends will  cease to accrue  on the  shares, and  they
shall  be deemed to cease to be  outstanding, provided that the redemption price
(including any accrued and  unpaid dividends to the  date fixed for  redemption)
has been duly paid or provided for.

    The  New First Interstate 9.875% Preferred Stock will not be entitled to the
benefits of any sinking fund.

    Notwithstanding the foregoing, unless the  full cumulative dividends on  all
outstanding  shares of  New First Interstate  9.875% Preferred  Stock shall have
been paid  or contemporaneously  are declared  and paid  for all  past  dividend
periods,  no  shares of  New First  Interstate 9.875%  Preferred Stock  shall be
redeemed unless all outstanding shares of New First Interstate 9.875%  Preferred
Stock  are simultaneously redeemed;  provided, however that  the foregoing shall
not prevent the purchase or acquisition of shares of New First Interstate 9.875%
Preferred Stock or of shares of such other series of preferred stock pursuant to
a purchase  or  exchange  offer  made  on the  same  terms  to  holders  of  all
outstanding  shares of New First Interstate  9.875% Preferred Stock, and, unless
the full cumulative dividends on all outstanding shares of New First  Interstate
9.875%  Preferred Stock and any other stock of New First Interstate ranking on a
parity with such  series as to  dividends and upon  liquidation shall have  been
paid  or contemporaneously are declared and  paid for all past dividend periods,
New First  Interstate  shall  not  purchase or  otherwise  acquire  directly  or
indirectly  any shares of  preferred stock of such  series (except by conversion
into or  exchange  for stock  of  New First  Interstate  ranking junior  to  the
preferred stock of such series as to dividends and upon liquidation.)

    In  addition, in order  to qualify as  Tier 1 capital,  New First Interstate
9.875% Preferred Stock  may not  be redeemed  at New  First Interstate's  option
without the prior approval of the Federal Reserve Board.

    LIQUIDATION  PREFERENCE.   Upon  any  voluntary or  involuntary liquidation,
dissolution or winding up of the affairs of New First Interstate, the holders of
the New First Interstate 9.875% Preferred Stock will be entitled, subject to the
rights of creditors, but  before any distribution or  payment to the holders  of
New  First Interstate Common Stock  or any other security  ranking junior to the
New First  Interstate  9.875% Preferred  Stock  on liquidation,  dissolution  or
winding  up of New First Interstate, to receive $200.00 per share (equivalent to
$25.00 per New First Interstate 9.875% Depositary Share) plus accrued and unpaid
dividends.  In  the  event  that,   upon  any  such  voluntary  or   involuntary
liquidation,  dissolution  or  winding up,  the  available assets  of  New First
Interstate are insufficient to pay such amount on all outstanding shares of  New
First Interstate 9.875% Preferred Stock and the corresponding amounts payable on
all  shares of other classes or series  of stock of New First Interstate ranking
on a  parity  with  the New  First  Interstate  9.875% Preferred  Stock  in  the
distribution  of assets,  then the  holders of  the New  First Interstate 9.875%
Preferred Stock and of all other such  classes or series shall share ratably  in
any distribution of assets in proportion to the full amounts to which they would
otherwise be respectively entitled.

    If such payment shall have been made in full to all holders of shares of New
First  Interstate  9.875% Preferred  Stock, the  remaining  assets of  New First
Interstate shall be distributed among the holders of any other classes of  stock
ranking  junior  to  the  New  First  Interstate  9.875%  Preferred  Stock  upon
liquidation, dissolution or winding up, according to their respective rights and
preferences and in each case according to their respective number of shares. For
such purposes, the  consolidation or  merger of  New First  Interstate with  any
other  corporation shall not be deemed  to constitute a liquidation, dissolution
or winding up of New First Interstate.

    VOTING RIGHTS.  Under  regulations adopted by the  Federal Reserve Board,  a
holder  of 25% or more  of the New First Interstate  Preferred Stock (or the New
First Interstate Depositary Shares (or  a holder of 5%  or more if it  otherwise
exercises  a  "controlling influence"  over New  First  Interstate) may  then be
subject to regulation as a bank holding company in accordance with the BHC  Act.
In addition,

                                      108
<PAGE>
any  other bank holding company may be  required to obtain the prior approval of
the Federal Reserve  Board to acquire  5% or  more of the  New First  Interstate
Preferred Stock (or the New First Interstate Depositary Shares).

    Each  holder of shares of New  First Interstate 9.875% Preferred Stock shall
be entitled to  notice of shareholders'  meetings and shall  be entitled to  one
vote  for each share of New First Interstate 9.875% Preferred Stock held by such
holder as of the record  date in connection with any  such vote, on all  matters
submitted  to the holders of shares of New First Interstate Common Stock and the
holders of shares of any other stock of New First Interstate entitled to general
voting powers as of the relevant  record date ("Other Voting Stock"). Except  as
otherwise  provided by  law, holders  of New  First Interstate  9.875% Preferred
Stock shall vote  with holders of  New First Interstate  Common Stock and  Other
Voting  Stock, together as a class, on all matters submitted to holders of Other
Voting Stock of New First Interstate.

    If at any time  of any annual  meeting of shareholders  for the election  of
directors of New First Interstate, a default in preference dividends (as defined
below)  shall exist on the New First Interstate 9.875% Preferred Stock or on any
shares of preferred  stock ranking  on a  parity with  the shares  of New  First
Interstate  9.875% Preferred Stock as to  dividends or upon liquidation (the New
First Interstate 9.875% Preferred Stock and  any such shares of preferred  stock
being  herein referred to  as "Parity Preferred  Stock"), the maximum authorized
number of  members  of  the  New  First  Interstate  Board  of  directors  shall
automatically  be increased by two. The two vacancies so created shall be filled
at such meeting by the  vote of the holders of  the New First Interstate  9.875%
Preferred  Stock and the holders of any  other Parity Preferred Stock upon which
like voting rights have been conferred  and are then exercisable (the New  First
Interstate  9.875% Preferred Stock  and such other  Parity Preferred Stock being
herein referred to  as "Voting Parity  Preferred Stock"), voting  together as  a
single  class without regard to  series, to the exclusion  of the holders of the
New First Interstate Common Stock and any  other class of capital stock that  is
not  Voting  Parity Preferred  Stock. The  holders of  the New  First Interstate
Common Stock and any other class of capital stock which has the right to vote at
such meeting (other  than the  Voting Parity  Preferred Stock)  shall elect  the
remaining directors. Such rights of the holders of Voting Parity Preferred Stock
shall  continue  until there  are no  preference dividends  in arrears  upon the
Parity Preferred Stock of any series  at which time such right shall  terminate,
except  as by law expressly provided, subject  to revesting in the event of each
and every subsequent  default of the  character above mentioned.  Upon any  such
termination  of the right  of the holders  of shares of  Voting Parity Preferred
Stock as a class to vote for directors as herein provided, the term of office of
each director then in office elected by  such holders voting as a class  (herein
called  a  "Preferred  Director")  shall  terminate  immediately.  Any Preferred
Director may be removed by, and shall not be removed except by, the vote of  the
holders  of record of  the outstanding shares of  Voting Parity Preferred Stock,
voting together as a single class without regard to series, at a meeting of  the
stockholders,  or of  the holders  of shares  of Voting  Parity Preferred Stock,
called for such purpose. So long as a default in any preference dividends on any
Parity Preferred Stock of any series shall exist, (A) any vacancy in the  office
of  a Preferred  Director may  be filled  (except as  provided in  the following
clause (B)) by the person  appointed by an instrument  in writing signed by  the
remaining  Preferred Director and filed with New First Interstate and (B) in the
case of the removal of any Preferred Director, the vacancy may be filled by  the
person  elected by the vote  of the holders of  the outstanding shares of Voting
Parity Preferred Stock,  voting together  as a  single class  without regard  to
series,  at the  same meeting  at which such  removal shall  be voted  or at any
subsequent meeting.  Each  director  appointed as  aforesaid  by  the  remaining
Preferred  Director  shall be  deemed  to be  a  Preferred Director.  Whenever a
default in preference dividends shall no longer exist: (i) the term of office of
the Preferred Directors shall end, (ii) the special voting powers vested in  the
holders of the Voting Parity Preferred Stock as provided herein shall expire and
(iii) the number of members of the New First Interstate Board of Directors shall
be  such  number  as may  be  provided  for in  New  First  Interstate's By-Laws
irrespective of any increase made as  provided herein. A "default in  preference
dividends" on the Voting Parity Preferred Stock of any series shall be deemed to
have occurred whenever the amount of unpaid accrued dividends upon any series of
preferred stock of New First Interstate through the last

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<PAGE>
preceding  dividend  period  therefor  shall  be  equivalent  to  six  quarterly
dividends (which, with respect to New First Interstate 9.875% Preferred Stock or
any other series of Parity Preferred Stock,  shall be deemed to be dividends  in
respect  of a number of  dividend periods containing not  less than 540 days) or
more, and, having so occurred, such default shall be deemed to exist  thereafter
until,  but only  until, all  accrued dividends on  all shares  of Voting Parity
Preferred Stock of each and every  series then outstanding shall have been  paid
to the end of the last preceding dividend period.

    So  long as any shares of New First Interstate 9.875% Preferred Stock remain
outstanding, New First  Interstate shall  not, without the  affirmative vote  or
consent  of the holders of  at least two-thirds of the  shares of each series of
preferred stock outstanding at the time, given in person or by proxy, either  in
writing  or at a meeting  (voting separately as a  class together with all other
series of Voting  Parity Preferred Stock),  (i) authorize, create  or issue,  or
increase  the  authorized or  issued amount,  of  any class  or series  of stock
ranking prior to the New First Interstate 9.875% Preferred Stock with respect to
payment of dividends or the distribution of assets on liquidation, or reclassify
any authorized stock of  New First Interstate into  any such shares, or  create,
authorize or issue any obligation or security convertible into or evidencing the
right  to purchase any such shares or (ii) amend, alter or repeal the provisions
of New First Interstate's  Certificate, or of the  resolutions contained in  the
Certificate  of  Designations  for such  series  of preferred  stock  whether by
merger, consolidation or otherwise, so as to materially and adversely affect any
right, preference, privilege or voting power  of such series of preferred  stock
or  the holders thereof; provided,  however, that any increase  in the amount of
the authorized preferred stock  or the creation or  issuance of other series  of
preferred  stock, or  any increase  in the amount  of authorized  shares of such
series or of any other series of  New First Interstate Preferred Stock, in  each
case  ranking on  a parity  with or  junior to  the New  First Interstate 9.875%
Preferred Stock, shall  not be deemed  to materially and  adversely affect  such
rights, preferences, privileges or voting powers.

    The  foregoing voting provisions will not apply  if, at or prior to the time
when the act with respect to which  such vote would otherwise be required  shall
be effected, all outstanding shares of the New First Interstate 9.875% Preferred
Stock  shall have  been redeemed or  called for redemption  and sufficient funds
shall have been deposited in trust to effect such redemption.

    CONVERSION RIGHTS.  The New First  Interstate 9.875% Preferred Stock is  not
convertible into shares of any other class or series of the capital stock of New
First Interstate.

    NO  OTHER RIGHTS.  The shares of New First Interstate 9.875% Preferred Stock
shall not  have  any  preferences, voting  powers  or  relative,  participating,
optional  or other special  rights except as  set forth above,  in the New First
Interstate Certificate or as otherwise required by law.

NEW FIRST INTERSTATE 9.0% PREFERRED STOCK

    Pursuant to  the  terms  of  the  Merger  Agreement,  each  share  of  First
Interstate  9.0% Preferred Stock will  be converted into one  share of New First
Interstate 9.0% Preferred Stock. The  New First Interstate 9.0% Preferred  Stock
will be substantially the same as the First Interstate 9.0% Preferred Stock.

    RANK.   The New First Interstate 9.0%  Preferred Stock will rank on a parity
as to  payment  of  dividends  and  distribution  of  assets  upon  dissolution,
liquidation  or winding  up of  New First  Interstate with  each other currently
outstanding shares of preferred stock of  FBS and with the New First  Interstate
9.875% Preferred Stock. See "Description of FBS and New First Interstate Capital
Stock--  Preferred Stock."  The New First  Interstate 9.0%  Preferred Stock will
rank prior to  the New First  Interstate Common Stock  and the Junior  Preferred
Stock  with respect to the payment of  dividends and distribution of assets upon
dissolution, liquidation or winding up of New First Interstate.

    DIVIDENDS.  Holders of shares of  New First Interstate 9.0% Preferred  Stock
will  be  entitled  to  receive, when,  as  and  if declared  by  the  New First
Interstate Board, or a duly authorized  committee thereof, out of assets of  New
First   Interstate  legally  available  for  payment,  cash  dividends,  payable
quarterly, at the rate of 9.0% per share per annum (equivalent to $2.25 per  New
First Interstate 9.0%

                                      110
<PAGE>
Depositary  Share  per  annum).  Dividends  on  the  New  First  Interstate 9.0%
Preferred Stock  shall be  payable quarterly  on the  last day  of March,  June,
September  and  December  of  each  year  (each,  a  "Dividend  Payment  Date"),
commencing on  the first  Dividend Payment  Date following  the Effective  Time.
Dividends  payable on  the first Dividend  Payment Date  following the Effective
Time shall be  in respect  of the quarterly  dividend period  commencing on  and
including  the last dividend  payment date with respect  to the First Interstate
9.0% Preferred Stock on which dividends  were paid prior to the Effective  Time.
Each  declared dividend shall be payable to  holders of record as they appear at
the close of business on the stock books of New First Interstate on such  record
dates,  not more than 60 calendar days  preceding the payment dates therefor, as
are determined by the New First Interstate Board (each of such dates, a  "Record
Date").  Quarterly dividend periods  shall commence on  and include the Dividend
Payment Date  and shall  end on  and include  the day  next preceding  the  next
following  Dividend Payment Date.  The right of holders  of New First Interstate
9.0% Preferred Stock to receive dividends is cumulative.

    All other terms and provisions governing the payment of dividends on the New
First Interstate 9.0% Preferred Stock are  identical to those governing the  New
First  Interstate 9.875%  Preferred Stock. See  "-- New  First Interstate 9.875%
Preferred Stock -- DIVIDENDS."

    REDEMPTION.  Prior to May 29, 1997, the New First Interstate 9.0%  Preferred
Stock  is not redeemable.  At any time on  or after May 29,  1997, the New First
Interstate 9.0% Preferred Stock is redeemable, in whole or in part, from time to
time at the option of New First Interstate  upon not less than 40 nor more  than
70  days' notice (or not less than 30 nor  more than 60 days' notice in the case
of the  New  First Interstate  9.0%  Depositary  Shares) at  $200.00  per  share
(equivalent  to $25.00 per New First  Interstate 9.0% Depositary Share) plus all
accrued and unpaid dividends to the date of redemption.

    The remaining provisions  governing redemption of  the New First  Interstate
9.0%  Preferred Stock are identical to those for the New First Interstate 9.875%
Preferred Stock.  See  "--  New  First  Interstate  9.875%  Preferred  Stock  --
REDEMPTION."

    LIQUIDATION  PREFERENCE.   Upon  any  voluntary or  involuntary liquidation,
dissolution or winding up of the affairs of New First Interstate, the holders of
the New First Interstate 9.0% Preferred  Stock will be entitled, subject to  the
rights  of creditors, but before  any distribution or payment  to the holders of
New First Interstate Common  Stock or any other  security ranking junior to  the
New First Interstate 9.0% Preferred Stock on liquidation, dissolution or winding
up  of New First Interstate, to receive  $200.00 per share (equivalent to $25.00
per New  First  Interstate  9.0%  Depositary  Share)  plus  accrued  and  unpaid
dividends.

    The  remaining  provisions governing  liquidation  rights of  the  New First
Interstate 9.0% Preferred Stock are identical  to those governing the New  First
Interstate 9.875% Preferred Stock. See "-- New First Interstate 9.875% Preferred
Stock -- LIQUIDATION PREFERENCE."

    VOTING  RIGHTS.   Holders of the  New First Interstate  9.0% Preferred Stock
will have  voting  rights  identical  to  those of  the  holders  of  New  First
Interstate 9.875% Preferred Stock.

    CONVERSION  RIGHTS.   The New First  Interstate 9.0% Preferred  Stock is not
convertible into shares of any other class or series of the capital stock of New
First Interstate.

    NO OTHER RIGHTS.   The shares of New  First Interstate 9.0% Preferred  Stock
shall  not  have  any  preferences, voting  powers  or  relative, participating,
optional or other special  rights except as  set forth above,  in the New  First
Interstate Certificate or as otherwise required by law.

NEW FIRST INTERSTATE DEPOSITARY SHARES

    At  the Effective Time, New First  Interstate will assume the obligations of
First Interstate under the Deposit  Agreements and will instruct the  Depositary
to treat the shares of New First Interstate 9.875% Preferred Stock and New First
Interstate 9.0% Preferred Stock, respectively, as new deposited securities under
the  applicable Deposit Agreement. In accordance  with the terms of the relevant

                                      111
<PAGE>
Deposit Agreement, the First Interstate Depositary Shares then outstanding shall
thereafter represent the shares of  New First Interstate 9.875% Preferred  Stock
or  New  First  Interstate  9.0%  Preferred  Stock,  as  appropriate.  New First
Interstate  will  request  that  the  Depositary  call  for  surrender  of   all
outstanding  First Interstate Depositary Receipts to  be exchanged for New First
Interstate Depositary Receipts specifically describing the New First  Interstate
9.875%  Preferred Stock or the New First Interstate 9.0% Preferred Stock, as the
case may  be. The  New First  Interstate  Depositary Receipts  to be  issued  in
exchange  for the  First Interstate  Depositary Receipts  will evidence  the New
First Interstate Depositary Shares.

    Each New  First  Interstate Depositary  Share  will represent  a  one-eighth
interest  in a share of New First  Interstate Preferred Stock. FBS has agreed to
use its best efforts to list the  New First Interstate Depositary Shares on  the
NYSE,  subject  to  official  notice  of  issuance.  The  New  First  Interstate
Depositary Shares will be freely transferable under the Securities Act,  subject
to  the restrictions discussed under "--  Resales of New First Interstate Common
Stock and New First  Interstate Depositary Shares  Received by First  Interstate
Shareholders."

    Subject  to the terms of  the Deposit Agreements, each  owner of a New First
Interstate  Depositary  Share  will  be  entitled  through  the  Depositary,  in
proportion  to  the  one-eighth interest  in  a  share of  New  First Interstate
Preferred Stock underlying such New  First Interstate Depositary Shares, to  all
rights  and  preferences of  a  share of  New  First Interstate  Preferred Stock
(including dividend, voting,  redemption and liquidation  rights). Because  each
share of New First Interstate Preferred Stock entitles the holder thereof to one
vote on matters on which the New First Interstate Preferred Stock is entitled to
vote,  each New First  Interstate Depositary Share will,  in effect, entitle the
holder thereof to one-eighth of a vote  thereon, rather than one full vote.  See
"-- New First Interstate Preferred Stock -- VOTING RIGHTS."

    Pending   the  preparation  of  definitive  engraved  New  First  Interstate
Depositary Receipts, the  Depositary may, upon  the written order  of New  First
Interstate,   issue   temporary   New  First   Interstate   Depositary  Receipts
substantially identical to (and entitling the holders thereof to all the  rights
pertaining  to) the definitive New First  Interstate Depositary Receipts but not
in definitive form. Definitive New First Interstate Depositary Receipts will  be
prepared   thereafter  without  unreasonable  delay,  and  temporary  New  First
Interstate Depositary Receipts  will be  exchangeable for  definitive New  First
Interstate Depositary Receipts at New First Interstate's expense.

    DIVIDENDS  AND OTHER DISTRIBUTIONS.  The Depositary will distribute all cash
distributions received in respect of the New First Interstate Preferred Stock to
the record holders of  New First Interstate Depositary  Shares relating to  such
New  First Interstate Preferred Stock  in proportion to the  numbers of such New
First Interstate Depositary Shares owned by such holders on the relevant  record
date.  The  Depositary shall  distribute only  such amount,  however, as  can be
distributed without attributing to any holder of New First Interstate Depositary
Shares a fraction of one cent, and any balance not so distributed shall be added
to and  treated  as  part  of  the next  sum  received  by  the  Depositary  for
distribution to record holders of New First Interstate Depositary Shares.

    In  the event  of a  distribution other  than in  cash, the  Depositary will
distribute property received by it to the record holders of New First Interstate
Depositary Shares entitled thereto, unless the Depositary determines that it  is
not  feasible to make such distribution, in  which case the Depositary may, with
the approval of the New First Interstate, sell such property and distribute  the
net proceeds from such sale to such holders.

    The  Deposit Agreements  also contain provisions  relating to  the manner in
which any subscription  or similar  rights offered  by New  First Interstate  to
holders  of the New First Interstate Preferred  Stock shall be made available to
holders of New First Interstate Depositary Shares.

    REDEMPTION OF NEW FIRST  INTERSTATE DEPOSITARY SHARES.   If a series of  the
New  First  Interstate  Preferred  Stock  underlying  the  New  First Interstate
Depositary Shares is subject to redemption, the

                                      112
<PAGE>
New First  Interstate  Depositary Shares  will  be redeemed  from  the  proceeds
received  by the Depositary resulting from the  redemption, in whole or in part,
of such  series  of  the  New  First Interstate  Preferred  Stock  held  by  the
Depositary.  The Depositary shall mail notice of redemption not less than 30 and
not more than  60 days  prior to  the date fixed  for redemption  to the  record
holders of the New First Interstate Depositary Shares to be so redeemed at their
respective  addresses appearing in the  Depositary's books. The redemption price
per New  First Interstate  Depositary  Share will  be  equal to  the  applicable
fraction  of the redemption price per share  payable with respect to such series
of New First Interstate Preferred  Stock. Whenever New First Interstate  redeems
shares  of  New First  Interstate Preferred  Stock held  by the  Depositary, the
Depositary will redeem as of  the same redemption date  the number of New  First
Interstate  Depositary  Shares  relating  to  shares  of  New  First  Interstate
Preferred Stock  so  redeemed.  If  less  than  all  the  New  First  Interstate
Depositary Shares are to be redeemed, the New First Interstate Depositary Shares
to  be redeemed will be selected by lot or pro rata, all as may be determined by
the Depositary.

    After the date  fixed for  redemption, the New  First Interstate  Depositary
Shares  so called for redemption will no  longer be deemed to be outstanding and
all rights of  the holders of  the New First  Interstate Depositary Shares  will
cease,  except the right to receive the  moneys payable upon such redemption and
any money or other property  to which the holders  of such New First  Interstate
Depositary  Shares  were entitled  upon such  redemption  upon surrender  to the
Depositary of the New First  Interstate Depositary Receipts evidencing such  New
First Interstate Depositary Shares.

    VOTING  THE NEW FIRST INTERSTATE PREFERRED STOCK.  Upon receipt of notice of
any meeting at which the holders of the New First Interstate Preferred Stock are
entitled to vote,  the Depositary will  mail the information  contained in  such
notice  of meeting to the record holders  of the New First Interstate Depositary
Shares relating to such New First Interstate Preferred Stock. Each record holder
of such New First Interstate Depositary Shares on the record date (which will be
the same date as the record date  for the New First Interstate Preferred  Stock)
will  be entitled to  instruct the Depositary  as to the  exercise of the voting
rights pertaining to  the number  of shares  of New  First Interstate  Preferred
Stock  underlying  such holder's  New  First Interstate  Depositary  Shares. The
Depositary will endeavor, insofar as practicable,  to vote the number of  shares
of  New First  Interstate Preferred Stock  underlying such  New First Interstate
Depositary Shares in accordance with such instructions, and New First Interstate
will agree to take action as may be deemed necessary by the Depositary in  order
to  enable the  Depositary to  do so.  The Depositary  will abstain  from voting
shares of New  First Interstate  Depositary Shares  relating to  such New  First
Interstate   Preferred  Stock  to  the  extent  it  does  not  receive  specific
instructions  from  the  holders  of  New  First  Interstate  Depositary  Shares
representing such shares of New First Interstate Preferred Stock.

    AMENDMENT   AND  TERMINATION   OF  THE   NEW  FIRST   INTERSTATE  DEPOSITARY
AGREEMENT.  The form of New First Interstate Depositary Receipts evidencing  the
New  First  Interstate  Depositary  Shares  and  any  provision  of  the Deposit
Agreements may at any time be amended by agreement between New First  Interstate
and  the Depositary. However, any amendment that materially and adversely alters
the rights of  the existing holders  of New First  Interstate Depositary  Shares
will  not be  effective unless  such amendment has  been approved  by the record
holders of at  least a majority  of the New  First Interstate Depositary  Shares
then  outstanding. A Deposit Agreement may be terminated by New First Interstate
or the Depositary only  if (i) all outstanding  New First Interstate  Depositary
Shares  relating  thereto have  been redeemed  or  (ii) there  has been  a final
distribution in  respect of  the New  First Interstate  Preferred Stock  of  the
relevant series in connection with any liquidation, dissolution or winding up of
New  First Interstate and such distribution  has been distributed to the holders
of the related New First Interstate Depositary Receipts.

    CHARGES OF DEPOSITARY.  New First Interstate will pay all transfer and other
taxes and  governmental  charges  arising  solely  from  the  existence  of  the
depositary arrangements. New First Interstate will pay charges of the Depositary
in   connection  with   the  initial  deposit   of  the   New  First  Interstate

                                      113
<PAGE>
Preferred Stock and any redemption of the New First Interstate Preferred  Stock.
Holders  of New First Interstate Depositary Receipts will pay other transfer and
other taxes and  governmental charges and  such other charges  as are  expressly
provided in the Deposit Agreements to be for their accounts.

    MISCELLANEOUS.   The  Depositary will  forward to  the holders  of New First
Interstate Depositary  Shares  all reports  and  communications from  New  First
Interstate that are delivered to the Depositary and that New First Interstate is
required to furnish to the holders of the New First Interstate Preferred Stock.

    Neither  the Depositary  nor New  First Interstate will  be liable  if it is
prevented or delayed by law or any circumstance beyond its control in performing
its obligations  under the  Deposit  Agreements. The  obligations of  New  First
Interstate  and the Depositary  under the Deposit Agreements  will be limited to
performance in  good faith  of their  duties  thereunder and  they will  not  be
obligated  to prosecute  or defend  any legal proceeding  in respect  of any New
First Interstate  Depositary  Shares or  New  First Interstate  Preferred  Stock
unless satisfactory indemnity is furnished. They may rely upon written advice of
counsel  or accountants, or information provided by persons presenting New First
Interstate  Preferred  Stock  for  deposit,  holders  of  New  First  Interstate
Depositary  Receipts or other persons believed  to be competent and on documents
believed to be genuine.

    The Deposit  Agreements will  not  permit holders  of New  First  Interstate
Depositary  Receipts to withdraw shares of  New First Interstate Preferred Stock
held by the Depositary  upon surrender of such  New First Interstate  Depositary
Receipts or otherwise.

    RESIGNATION  AND RENEWAL  OF DEPOSITARY.   The Depositary may  resign at any
time by delivering to New First Interstate notice of its election to do so,  and
New First Interstate may at any time remove the Depositary, any such resignation
or removal to take effect upon the appointment of a successor Depositary and its
acceptance  of  such appointment.  Such successor  Depositary must  be appointed
within 60 days after delivery of the  notice of resignation or removal and  must
be  a bank or trust company having its principal office in the United States and
having a combined capital and surplus of at least $50,000,000.

    TAXATION.  Owners  of the  New First  Interstate Depositary  Shares will  be
treated  for federal income tax purposes as if they were owners of the New First
Interstate Preferred Stock represented by  such New First Interstate  Depositary
Shares.

        AMENDMENTS TO NEW FIRST INTERSTATE CERTIFICATE OF INCORPORATION

    The  Merger  Agreement  provides  that,  at  the  Effective  Time,  the  FBS
Certificate will  be amended  in accordance  with the  DGCL as  follows: (i)  an
amendment  to the FBS Certificate to change the name of FBS to "First Interstate
Bancorp"; and  (ii) an  amendment to  the FBS  Certificate of  Incorporation  to
increase  the number of authorized shares of FBS Common Stock to 500,000,000 and
of preferred stock of FBS to 15,000,000. The principal purpose and effect of the
Certificate Amendments will be  to create a sufficient  number of shares of  New
First  Interstate  Common Stock  for issuance  to  former shareholders  of First
Interstate in the  Merger and to  authorize additional shares  of capital  stock
that  may be  issued upon the  approval of the  Board of Directors  of New First
Interstate without shareholder  approval. Approval  of each  of the  Certificate
Amendments  is  contingent upon  the  approval of  each  of the  other  FBS Vote
Matters.

    As of September 30, 1995, there were 129,429,363 shares of FBS Common  Stock
outstanding  and  an  additional  15,973,680 shares  of  FBS  Common  Stock were
reserved  for  issuance  pursuant  to  various  stock-based  plans  of  FBS,  in
connection  with warrants and convertible preferred stock and in connection with
the pending FirsTier Acquisition. This leaves FBS with 54,596,957 authorized but
unissued, unreserved and uncommitted  shares of FBS  Common Stock available  for
issuance. After giving effect to the Merger, approximately 353,000,000 shares of
New First Interstate Common Stock will be outstanding and reserved for issuance.
Accordingly,  New First Interstate will have approximately 147,000,000 shares of
New First Interstate Common  Stock available for issuance.  As of September  30,

                                      114
<PAGE>
1995, there were 2,095,800 preferred shares of FBS outstanding and an additional
1,412,750  preferred  shares of  FBS reserved  for  issuance. FBS  had 4,884,500
authorized but unissued, unreserved  and uncommitted preferred shares  available
for  issuance at September 30, 1995. Assuming no change in capitalization except
giving effect to  the Merger,  at the Effective  Time, 3,845,800  shares of  New
First  Interstate  Preferred Stock  will be  outstanding.  Giving effect  to the
Merger, aproximately 3,500,000 preferred shares  will be reserved for  issuance.
As  a result, New  First Interstate will have  approximately 7,650,000 shares of
New First Interstate  Preferred Stock  authorized but  unissued, unreserved  and
uncommitted preferred shares available for issuance.

    The  additional  shares  of  New First  Interstate  Common  Stock  for which
authorization is sought  would be a  part of  the existing class  of FBS  Common
Stock  and, if and when issued, would have the same rights and privileges as the
shares of FBS Common Stock  presently outstanding. Such additional shares  would
not  (and the shares of  FBS Common Stock presently  outstanding do not) entitle
holders thereof  to preemptive  or  cumulative voting  rights. The  increase  in
authorized  shares will, in  addition to providing  sufficient capital stock for
issuance in connection with  the Merger, provide  additional shares for  general
corporate  purposes,  including  stock  dividends,  raising  additional capital,
issuances pursuant to employee and  shareholder stock plans and possible  future
acquisitions. There are, however, no present plans, understandings or agreements
for  issuing  a material  number of  additional shares  of New  First Interstate
Common Stock  from the  additional shares  of stock  proposed to  be  authorized
pursuant to the amendment.

    The  issuance of shares of New  First Interstate Common Stock, including the
additional shares that would be authorized if the proposed amendment is adopted,
may dilute  the present  equity ownership  position of  current holders  of  FBS
Common  Stock and  may be  made without  shareholder approval,  unless otherwise
required by applicable laws  or stock exchange  regulation. Under existing  NYSE
regulations,  approval of the holders  of a majority of  the shares of New First
Interstate Common Stock would  nevertheless be required  in connection with  any
transaction  or series of related transactions that would result in the original
issuance of additional shares of New  First Interstate Common Stock, other  than
in  a public  offering for cash,  if (i)  the New First  Interstate Common Stock
(including securities convertible into New  First Interstate Common Stock)  has,
or  will have upon  issuance, voting power equal  to or in excess  of 20% of the
voting power outstanding before the issuance of such New First Interstate Common
Stock, (ii) the  number of shares  of New  First Interstate Common  Stock to  be
issued  is or  will be  equal to  or in excess  of 20%  of the  number of shares
outstanding before the  issuance of  the New  First Interstate  Common Stock  or
(iii) the issuance would result in a change of control of New First Interstate.

    The  additional  authorized  but  unissued shares  of  New  First Interstate
Preferred Stock that  will become  available if the  Certificate Amendments  are
adopted,  whether  alone  or in  tandem  with  the New  First  Interstate Rights
described above, could  make a change  in control of  New First Interstate  more
difficult  to achieve. Under certain circumstances, such shares could be used to
create voting impediments to frustrate persons  seeking to effect a takeover  or
otherwise  gain control of  New First Interstate.  Such shares could  be sold to
purchasers who might  side with  the New First  Interstate Board  in opposing  a
takeover  bid that the Board  determines not to be in  the best interests of New
First Interstate or its shareholders. The  amendment might also have the  effect
of  discouraging an attempt by another person or entity, through the acquisition
of a  substantial number  of shares  of New  First Interstate  Common Stock,  to
acquire  control of New First  Interstate with a view  to consummating a merger,
sale of  all  or  any part  of  New  First Interstate's  assets,  or  a  similar
transaction,  because the  issuance of  new shares could  be used  to dilute the
stock ownership of such person or entity.

                                 LEGAL OPINIONS

    The validity of the securities offered  hereby has been passed upon for  FBS
by Dorsey & Whitney P.L.L.P., Minneapolis, Minnesota.

                                      115
<PAGE>
    The  Merger Agreement provides  that, as a condition  to FBS's obligation to
consummate the Merger,  FBS receive the  opinion of Dorsey  & Whitney  P.L.L.P.,
Minneapolis,  Minnesota, counsel  to FBS, substantially  to the  effect that the
Merger will qualify as a "reorganization" under Section 368(a) of the Code.  The
Merger  Agreement  also  provides that,  as  a condition  to  First Interstate's
obligation to consummate  the Merger,  First Interstate receive  the opinion  of
Skadden,  Arps, Slate, Meagher and Flom, New  York, New York, special counsel to
First Interstate, substantially to the effect that the Merger will qualify as  a
"reorganization" under Section 368(a) of the Code.

    Dorsey  & Whitney P.L.L.P.  and certain of  its members are  indebted to and
have other banking and trust relationships with certain banking subsidiaries  of
FBS.

                                    EXPERTS

    The  consolidated financial  statements of FBS  as of December  31, 1994 and
1993, and for  each of the  three years in  the period ended  December 31,  1994
appearing  in FBS's  Current Report on  Form 8-K  dated March 3,  1995 have been
audited by Ernst & Young LLP, independent auditors, as set forth in their report
thereon included therein and incorporated herein by reference. Such consolidated
financial statements are incorporated herein by reference in reliance upon  such
report  given  upon the  authority of  such  firm as  experts in  accounting and
auditing.

    The consolidated financial statements of First Interstate as of December 31,
1994 and 1993, and for each of the three years in the period ended December  31,
1994  appearing in the  Annual Report on  Form 10-K of  First Interstate for the
year ended December 31, 1994 have been audited by Ernst & Young LLP, independent
auditors, as set forth in their report thereon included therein and incorporated
herein by  reference. Such  consolidated financial  statements are  incorporated
herein  by reference in  reliance upon such  report given upon  the authority of
said firm as experts in accounting and auditing.

    The  consolidated  financial  statements  of  FirsTier  appearing  in  FBS's
Amendment  No. 1 on Form 8-K/A filed August  30, 1995 to FBS's Current Report on
Form 8-K  filed  August  18, 1995  have  been  audited by  Arthur  Andersen  LLP
independent  public  accountants,  as set  forth  in their  report  with respect
thereto, and are  incorporated by reference  in reliance upon  the authority  of
said firm as experts in accounting and auditing in giving said reports.

                         INDEPENDENT PUBLIC ACCOUNTANTS

    Representatives   of  Ernst  &  Young  LLP,  FBS's  and  First  Interstate's
independent auditors, are expected to be present at the FBS Special Meeting  and
the  First Interstate Special  Meeting. They may be  afforded the opportunity to
make a statement if  they desire to do  so and are expected  to be available  to
respond to appropriate questions.

                             SHAREHOLDER PROPOSALS

    FBS  SHAREHOLDER PROPOSALS.  In order to  be eligible for inclusion in FBS's
proxy solicitation materials for  its 1996 annual  meeting of shareholders,  any
shareholder  proposal to be considered  at such meeting must  be received by FBS
Corporate Secretary, Lee R. Mitau, or his successor, at FBS's main office, First
Bank Place, 601 Second Avenue South, Minneapolis, Minnesota 55402-4302, no later
than November 16, 1995. Any such  proposal shall be subject to the  requirements
of the proxy rules adopted under the Exchange Act.

    FIRST  INTERSTATE SHAREHOLDER PROPOSALS.  If  the Merger is not consummated,
in order to be eligible for  inclusion in First Interstate's proxy  solicitation
materials  for its 1996 annual meeting of shareholders, any shareholder proposal
to be  considered  at  such  meeting must  be  received  by  First  Interstate's
Corporate  Secretary, Edward S. Garlock, or his successor, at First Interstate's
main office, First

                                      116
<PAGE>
Interstate Bancorp,  633 West  Fifth Street,  TC 7-10,  Los Angeles,  California
90071,  no later than November  21, 1995. Any such  proposal shall be subject to
the requirements of the proxy rules adopted under the Exchange Act.

                     MANAGEMENT AND ADDITIONAL INFORMATION

    Certain information  relating  to the  management,  executive  compensation,
various  benefit  plans  (including  stock  plans),  voting  securities  and the
principal holders thereof,  certain relationships and  related transactions  and
other  related  matters  as to  FBS  and First  Interstate  is set  forth  in or
incorporated by reference in the respective Annual Reports on Form 10-K for  the
year ended December 31, 1994 of FBS and First Interstate, which are incorporated
by  reference in  this Joint  Proxy Statement/Prospectus.  See "Incorporation of
Certain Documents by Reference." FBS and First Interstate shareholders who  wish
to  obtain copies  of these  documents may contact  FBS or  First Interstate, as
applicable, at its address or telephone number set forth under "Incorporation of
Certain Documents by Reference."

                                      117
<PAGE>
          UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

    The  following Unaudited  Pro Forma Condensed  Combined Balance  Sheet as of
September 30, 1995, combines the historical consolidated balance sheets of First
Bank System,  Inc.  ("FBS"),  First  Interstate  Bancorp  ("First  Interstate"),
FirsTier  Financial, Inc. ("FirsTier"), Midwestern Services, Inc., and Southwest
Holdings, Inc. as  if the merger  with First Interstate  (the "Merger") and  the
other acquisitions had been effective on September 30, 1995, after giving effect
to  certain adjustments described  in the attached Notes  to Unaudited Pro Forma
Condensed Combined  Financial  Statements.  The Unaudited  Pro  Forma  Condensed
Combined  Balance  Sheet  also includes  the  intangible assets  related  to the
purchase by FBS of the corporate trust relationships and accounts of BankAmerica
Corporation. The Unaudited Pro Forma Condensed Combined Statements of Income for
the nine months ended September 30, 1995, and the year ended December 31,  1994,
present the combined results of operations of FBS, First Interstate and FirsTier
as  if  the  Merger and  the  FirsTier  acquisition had  been  effective  at the
beginning of each period, after  giving effect to certain adjustments  described
in  the  attached  Notes to  Unaudited  Pro Forma  Condensed  Combined Financial
Statements. The Unaudited Pro Forma Condensed Combined Statements of Income  for
the years ended December 31, 1993 and 1992, present only the combined results of
operations  of FBS and First  Interstate as if the  Merger had been effective at
the beginning  of  each  period,  after giving  effect  to  certain  adjustments
described  in  the  attached Notes  to  Unaudited Pro  Forma  Condensed Combined
Financial Statements.

    The  unaudited  pro  forma  condensed  combined  financial  statements   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  FBS  and  First
Interstate are combined and recorded at their historical amounts.

    The  FirsTier  acquisition  is  reflected  using  the  purchase  method   of
accounting.  Under  this  method  of  accounting,  the  purchase  price  will be
allocated to assets acquired  and liabilities assumed  based on their  estimated
fair  values  at the  closing of  the  acquisition. The  amount of  the purchase
accounting adjustments included in these unaudited pro forma condensed  combined
financial  statements  are  preliminary  estimates.  The  actual  amount  of the
adjustments will  be  based on  information  available  at the  closing  of  the
acquisition and could be different from the estimates.

    The  unaudited pro forma condensed  combined financial information presented
is included for informational purposes only and is not necessarily indicative of
the combined  financial position  or results  of the  future operations  of  the
combined  entity or  the actual  results that would  have been  achieved had the
Merger and  the  FirsTier  acquisition  been consumated  prior  to  the  periods
indicated.

    The  pro forma  condensed combined financial  information should  be read in
conjunction with the financial statements  of First Interstate and  subsidiaries
included  in  FBS's Current  Report on  Form  8-K filed  November 16,  1995, the
financial statements of  FirsTier and subsidiaries  included in FBS's  Amendment
No.  1 on Form  8-K/A filed August  30, 1995 and  Amendment No. 2  on Form 8-K/A
filed November 15,  1995 and the  financial statements of  FBS and  subsidiaries
included  in its Current  Report on Form 8-K  filed March 3,  1995, and its Form
10-Q Quarterly Report for the nine months ended September 30, 1995.

                                     INDEX

<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Unaudited Pro Forma Condensed Combined Balance Sheet at September 30,
 1995..................................................................... F-2
Unaudited Pro Forma Condensed Combined Statement of Income:
  Nine months ended September 30, 1995.................................... F-3
  Year ended December 31, 1994............................................ F-4
  Year ended December 31, 1993............................................ F-5
  Year ended December 31, 1992............................................ F-6
Notes to Unaudited Pro Forma Condensed Combined Financial Statements...... F-7
</TABLE>

                                      F-1
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
              UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET
                               SEPTEMBER 30, 1995

<TABLE>
<CAPTION>
                                                                                                   FIRST INTERSTATE
                                                 FIRSTIER                                            CONSOLIDATED
                                         ------------------------                              ------------------------
                              FBS                      PURCHASE        OTHER        FBS PRO                   MERGER      PRO FORMA
ASSETS                    CONSOLIDATED   HISTORICAL   ADJUSTMENTS   ACQUISITIONS     FORMA     HISTORICAL   ADJUSTMENTS   COMBINED
                          ------------   ----------   -----------   ------------   ---------   ----------   -----------   ---------
                                                                        (IN MILLIONS)
<S>                       <C>            <C>          <C>           <C>            <C>         <C>          <C>           <C>
Cash and due from
 banks..................    $ 1,586        $  208                      $  10        $ 1,804     $   5,916                  $ 7,720
Federal funds sold and
 securities purchased
 under agreements to
 resell.................        260            97                         12            369           470                      839
Trading account
 securities.............        164                                                     164           116                      280
Held-to-maturity
 securities.............                      741        $(741)                                     9,320     $(4,000)       5,320
Available-for-sale
 securities.............      3,302           261          741           100          4,404           112                    4,516
Loans...................     25,877         2,191                        266         28,334        35,967                   64,301
  Less allowance for
   credit losses........        469            52                          3            524           847        (250)       1,121
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
  Net loans.............     25,408         2,139                        263         27,810        35,120         250       63,180
Bank premises and
 equipment..............        410            50                         11            471         1,277         (40)       1,708
Interest receivable.....        189            35                                       224           326                      550
Customers' liability on
 acceptances............        165             1                                       166            54                      220
Other assets............      1,474            53          338           208          2,073         2,356          85        4,514
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
    Total assets........    $32,958        $3,585        $ 338         $ 604        $37,485     $  55,067     $(3,705)     $88,847
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
LIABILITIES AND SHAREHOLDERS' EQUITY
Deposits:
  Noninterest-bearing...    $ 5,779        $  471                      $  74        $ 6,324     $  17,044                  $23,368
  Interest-bearing......     16,116         2,305                        656         19,077        31,192                   50,269
                          ------------   ----------                   ------                   ----------                 ---------
    Total deposits......     21,895         2,776                        730         25,401        48,236                   73,637
Federal funds purchased
 and securities sold
 under agreements to
 repurchase.............      1,602           204        $ 202          (200)         1,808           307     $(2,115)           0
Other short-term funds
 borrowed...............      2,554             6                          4          2,564            69      (1,885)         748
Long-term debt..........      3,127           164                         10          3,301         1,368                    4,669
Acceptances
 outstanding............        165             1                                       166            54                      220
Other liabilities.......        879            58                         11            948         1,052         435        2,435
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
    Total liabilities...     30,222         3,209          202           555         34,188        51,086      (3,565)      81,709
Shareholders' equity:
  Preferred stock.......        105                                                     105           350                      455
  Common stock..........        169            94          (84)            2            181           169          77          427
  Capital surplus.......        900             5          225            45          1,175         1,667        (719)       2,123
  Retained earnings.....      1,837           283         (283)            2          1,839         2,436        (140)       4,135
  Unrealized (loss) gain
   on securities, net of
   tax..................         (3)            4           (4)                          (3)            1                       (2)
  Less cost of common
   stock in treasury....       (272)          (10)         282                                       (642)        642            0
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
  Total shareholders'
   equity...............      2,736           376          136            49          3,297         3,981        (140)       7,138
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
    Total liabilities
     and shareholders'
     equity.............    $32,958        $3,585        $ 338         $ 604        $37,485     $  55,067     $(3,705)     $88,847
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
                          ------------   ----------   -----------     ------       ---------   ----------   -----------   ---------
</TABLE>

    See Notes to Unaudited Pro Forma Condensed Combined Financial Statements

                                      F-2
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
           UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF INCOME
                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1995

<TABLE>
<CAPTION>
                                                                     FIRSTIER
                                                             ------------------------                  FIRST
                                                  FBS                      PURCHASE       FBS        INTERSTATE      PRO FORMA
                                              CONSOLIDATED   HISTORICAL   ADJUSTMENTS  PRO FORMA    CONSOLIDATED      COMBINED
                                             --------------  -----------  -----------  ----------  --------------  --------------
                                                                     (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                          <C>             <C>          <C>          <C>         <C>             <C>
INTEREST INCOME
Loans......................................      $  1,693.0   $   142.9                $  1,835.9   $    2,282.7       $  4,118.6
Securities:
  Taxable..................................           175.2        29.0                     204.2          478.8            683.0
  Exempt from federal income taxes.........             8.4        18.0                      26.4            1.3             27.7
Other interest income......................            26.4         5.1                      31.5           26.3             57.8
                                             --------------  -----------  -----------  ----------  --------------  --------------
    Total interest income..................         1,903.0       195.0                   2,098.0        2,789.1          4,887.1
INTEREST EXPENSE
Deposits...................................           538.2        78.3                     616.5          721.8          1,338.3
Federal funds purchased and repurchase
 agreements................................            87.6         8.2    $    15.0        110.8           69.4            180.2
Other short-term funds borrowed............            56.8         1.2                      58.0            2.8             60.8
Long-term debt.............................           140.5         6.8                     147.3           90.5            237.8
                                             --------------  -----------  -----------  ----------  --------------  --------------
    Total interest expense.................           823.1        94.5         15.0        932.6          884.5          1,817.1
                                             --------------  -----------  -----------  ----------  --------------  --------------
Net interest income........................         1,079.9       100.5        (15.0)     1,165.4        1,904.6          3,070.0
Provision for credit losses................            84.0         0.8                      84.8                            84.8
                                             --------------  -----------  -----------  ----------  --------------  --------------
Net interest income after provision for
 credit losses.............................           995.9        99.7        (15.0)     1,080.6        1,904.6          2,985.2
NONINTEREST INCOME
Credit card fees...........................           171.0         7.3                     178.3           41.4            219.7
Trust fees.................................           127.5        12.6                     140.1          123.3            263.4
Service charges on deposit accounts........            93.3        12.8                     106.1          446.3            552.4
Securities gains...........................                                                                  5.6              5.6
Gain on sale of branches...................            31.0                                  31.0                            31.0
Other......................................           163.0         9.7                     172.7          206.7            379.4
                                             --------------  -----------  -----------  ----------  --------------  --------------
    Total noninterest income...............           585.8        42.4                     628.2          823.3          1,451.5
NONINTEREST EXPENSE
Salaries and benefits......................           405.9        41.4                     447.3          804.2          1,251.5
Occupancy and equipment....................           146.1        10.7                     156.8          293.5            450.3
Amortization of goodwill and other
 intangible assets.........................            42.2         1.3         12.7         56.2           45.3            101.5
Restructuring..............................                                                                 15.7             15.7
Other......................................           324.4        30.6                     355.0          479.6            834.6
                                             --------------  -----------  -----------  ----------  --------------  --------------
    Total noninterest expense..............           918.6        84.0         12.7      1,015.3        1,638.3          2,653.6
                                             --------------  -----------  -----------  ----------  --------------  --------------
Income before income taxes.................           663.1        58.1        (27.7)       693.5        1,089.6          1,783.1
Applicable income taxes....................           245.7        15.5         (5.6)       255.6          419.9            675.5
                                             --------------  -----------  -----------  ----------  --------------  --------------
Net Income.................................      $    417.4   $    42.6    $   (22.1)  $    437.9   $      669.7       $  1,107.6
                                             --------------  -----------  -----------  ----------  --------------  --------------
                                             --------------  -----------  -----------  ----------  --------------  --------------
Net income applicable to common equity.....      $    411.8   $    42.6    $   (22.1)  $    432.3   $      644.8       $  1,077.1
                                             --------------  -----------  -----------  ----------  --------------  --------------
                                             --------------  -----------  -----------  ----------  --------------  --------------
EARNINGS PER COMMON SHARE
Average common and common equivalent
 shares....................................     135,007,519                                                           344,505,319
Net income.................................  $         3.05                                                        $         3.13
                                             --------------                                                        --------------
                                             --------------                                                        --------------
</TABLE>

    See Notes to Unaudited Pro Forma Condensed Combined Financial Statements

                                      F-3
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
           UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF INCOME
                      FOR THE YEAR ENDED DECEMBER 31, 1994

<TABLE>
<CAPTION>
                                                                      FIRSTIER
                                                              ------------------------                  FIRST
                                                  FBS                       PURCHASE       FBS        INTERSTATE      PRO FORMA
                                              CONSOLIDATED    HISTORICAL   ADJUSTMENTS  PRO FORMA    CONSOLIDATED      COMBINED
                                            ----------------  -----------  -----------  ----------  --------------  --------------
                                                                     (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                         <C>               <C>          <C>          <C>         <C>             <C>
INTEREST INCOME
Loans.....................................          $1,914.7   $   161.9                $  2,076.6   $    2,303.7         $4,380.3
Securities:
  Taxable.................................             327.9        44.3                     372.2          841.6          1,213.8
  Exempt from federal income taxes........              12.0        20.5                      32.5            2.7             35.2
Other interest income.....................              33.5         4.8                      38.3           44.0             82.3
                                            ----------------  -----------  -----------  ----------  --------------  --------------
      Total interest income...............           2,288.1       231.5                   2,519.6        3,192.0          5,711.6
INTEREST EXPENSE
Deposits..................................             597.3        82.1                     679.4          725.0          1,404.4
Federal funds purchased and repurchase
 agreements...............................             103.1         7.9    $    16.8        127.8           26.5            154.3
Other short-term funds borrowed...........              20.4         1.4                      21.8            7.7             29.5
Long-term debt............................             147.9         5.7                     153.6          106.3            259.9
                                            ----------------  -----------  -----------  ----------  --------------  --------------
      Total interest expense..............             868.7        97.1         16.8        982.6          865.5          1,848.1
                                            ----------------  -----------  -----------  ----------  --------------  --------------
Net interest income.......................           1,419.4       134.4        (16.8)     1,537.0        2,326.5          3,863.5
Provision for credit losses...............             123.6        (0.2)                    123.4        --                 123.4
                                            ----------------  -----------  -----------  ----------  --------------  --------------
Net interest income after provision for
 credit losses............................           1,295.8       134.6        (16.8)     1,413.6        2,326.5          3,740.1
NONINTEREST INCOME
Credit card fees..........................             179.0         9.6                     188.6           39.7            228.3
Trust fees................................             159.2        16.1                     175.3          193.3            368.6
Service charges on deposit accounts.......             127.3        15.6                     142.9          561.9            704.8
Securities (losses) gains.................            (115.0)       (3.7)                   (118.7)          21.1            (97.6)
Other.....................................             208.4        14.4                     222.8          238.3            461.1
                                            ----------------  -----------  -----------  ----------  --------------  --------------
      Total noninterest income............             558.9        52.0                     610.9        1,054.3          1,665.2
NONINTEREST EXPENSE
Salaries and benefits.....................             556.4        52.8                     609.2        1,079.9          1,689.1
Occupancy and equipment...................             192.1        16.8                     208.9          356.6            565.5
Amortization of goodwill and other
 intangible assets........................              50.4         1.7         16.9         69.0           35.3            104.3
Merger integration and severance costs....             122.7                                 122.7                           122.7
Restructuring.............................                                                                  141.3            141.3
Other.....................................             427.8        46.8                     474.6          584.7          1,059.3
                                            ----------------  -----------  -----------  ----------  --------------  --------------
      Total noninterest expense...........           1,349.4       118.1         16.9      1,484.4        2,197.8          3,682.2
                                            ----------------  -----------  -----------  ----------  --------------  --------------
Income from continuing operations before
 income taxes.............................             505.3        68.5        (33.7)       540.1        1,183.0          1,723.1
Applicable income taxes...................             191.8        17.6         (6.4)       203.0          449.5            652.5
                                            ----------------  -----------  -----------  ----------  --------------  --------------
Income from continuing operations.........            $313.5   $    50.9    $   (27.3)  $    337.1   $      733.5         $1,070.6
                                            ----------------  -----------  -----------  ----------  --------------  --------------
                                            ----------------  -----------  -----------  ----------  --------------  --------------
Income from continuing operations
 applicable to common equity..............            $300.9   $    50.9    $   (27.3)  $    324.5   $      700.2         $1,024.7
                                            ----------------  -----------  -----------  ----------  --------------  --------------
                                            ----------------  -----------  -----------  ----------  --------------  --------------
EARNINGS PER COMMON SHARE
Average common and common equivalent
 shares...................................       136,274,991                                                           353,672,040
Income from continuing operations.........             $2.21                                                                 $2.90
                                            ----------------                                                        --------------
                                            ----------------                                                        --------------
</TABLE>

    See Notes to Unaudited Pro Forma Condensed Combined Financial Statements

                                      F-4
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
           UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF INCOME
                      FOR THE YEAR ENDED DECEMBER 31, 1993

<TABLE>
<CAPTION>
                                                                                       FIRST
                                                                        FBS          INTERSTATE      PRO FORMA
                                                                    CONSOLIDATED    CONSOLIDATED      COMBINED
                                                                   --------------  --------------  --------------
                                                                        (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                                                <C>             <C>             <C>
INTEREST INCOME
Loans............................................................      $  1,730.7   $    1,980.9       $  3,711.6
Securities:
  Taxable........................................................           352.1          861.4          1,213.5
  Exempt from federal income taxes...............................            14.6            2.9             17.5
Other interest income............................................            37.1           99.0            136.1
                                                                   --------------  --------------  --------------
    Total interest income........................................         2,134.5        2,944.2          5,078.7
INTEREST EXPENSE
Deposits.........................................................           648.3          719.9          1,368.2
Federal funds purchased and repurchase agreements................            31.8           10.2             42.0
Other short-term funds borrowed..................................            20.1            5.8             25.9
Long-term debt...................................................            96.1          136.2            232.3
                                                                   --------------  --------------  --------------
    Total interest expense.......................................           796.3          872.1          1,668.4
                                                                   --------------  --------------  --------------
Net interest income..............................................         1,338.2        2,072.1          3,410.3
Provision for credit losses......................................           133.1          112.6            245.7
                                                                   --------------  --------------  --------------
Net interest income after provision for credit losses............         1,205.1        1,959.5          3,164.6
NONINTEREST INCOME
Credit card fees.................................................           137.1           44.1            181.2
Trust fees.......................................................           146.1          177.4            323.5
Service charges on deposit accounts..............................           126.0          513.0            639.0
Securities gains.................................................             0.3            9.7             10.0
Other............................................................           209.4          210.0            419.4
                                                                   --------------  --------------  --------------
    Total noninterest income.....................................           618.9          954.2          1,573.1
NONINTEREST EXPENSE
Salaries and benefits............................................           538.9          975.3          1,514.2
Occupancy and equipment..........................................           190.4          337.2            527.6
Amortization of goodwill and other intangible assets.............            41.3           24.2             65.5
Merger and integration...........................................            72.2                            72.2
Other............................................................           421.9          695.7          1,117.6
                                                                   --------------  --------------  --------------
    Total noninterest expense....................................         1,264.7        2,032.4          3,297.1
                                                                   --------------  --------------  --------------
Income from continuing operations before income taxes,
 extraordinary item and cumulative effect of changes in
 accounting principles...........................................           559.3          881.3          1,440.6
Applicable income taxes..........................................           198.6          319.9            518.5
                                                                   --------------  --------------  --------------
Income from continuing operations before extraordinary item and
 cumulative effect of changes in accounting principles...........      $    360.7   $      561.4       $    922.1
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
Income from continuing operations before extraordinary item and
 cumulative effect of changes in accounting principles applicable
 to common equity................................................      $    331.5   $      514.8       $    846.3
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
EARNINGS PER COMMON SHARE
Average common and common equivalent shares......................     134,588,664                     343,147,811
Income from continuing operations before extraordinary item and
 cumulative effect of changes in accounting principles...........  $         2.46                  $         2.47
                                                                   --------------                  --------------
                                                                   --------------                  --------------
</TABLE>

    See Notes to Unaudited Pro Forma Condensed Combined Financial Statements

                                      F-5
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
           UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF INCOME
                      FOR THE YEAR ENDED DECEMBER 31, 1992

<TABLE>
<CAPTION>
                                                                                       FIRST
                                                                        FBS          INTERSTATE      PRO FORMA
                                                                    CONSOLIDATED    CONSOLIDATED      COMBINED
                                                                   --------------  --------------  --------------
                                                                        (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                                                <C>             <C>             <C>
INTEREST INCOME
Loans............................................................      $  1,687.2   $    2,238.8       $  3,926.0
Securities:
  Taxable........................................................           336.5          746.9          1,083.4
  Exempt from federal income taxes...............................            12.0            3.9             15.9
Other interest income............................................            70.4          200.1            270.5
                                                                   --------------  --------------  --------------
    Total interest income........................................         2,106.1        3,189.7          5,295.8
INTEREST EXPENSE
Deposits.........................................................           797.7          932.8          1,730.5
Federal funds purchased and repurchase agreements................            37.1           10.4             47.5
Other short-term funds borrowed..................................            17.1            4.0             21.1
Long-term debt...................................................           101.2          227.9            329.1
                                                                   --------------  --------------  --------------
    Total interest expense.......................................           953.1        1,175.1          2,128.2
                                                                   --------------  --------------  --------------
Net interest income..............................................         1,153.0        2,014.6          3,167.6
Provision for credit losses......................................           191.7          314.3            506.0
                                                                   --------------  --------------  --------------
Net interest income after provision for credit losses............           961.3        1,700.3          2,661.6
NONINTEREST INCOME
Credit card fees.................................................           116.9           37.3            154.2
Trust fees.......................................................           127.8          170.3            298.1
Service charges on deposit accounts..............................           114.8          478.9            593.7
Securities gains (losses)........................................            46.3           (1.8)            44.5
Other............................................................           207.9          227.4            435.3
                                                                   --------------  --------------  --------------
    Total noninterest income.....................................           613.7          912.1          1,525.8
NONINTEREST EXPENSE
Salaries and benefits............................................           521.2        1,035.4          1,556.6
Occupancy and equipment..........................................           170.4          359.4            529.8
Amortization of goodwill and other intangible assets.............            34.0           33.0             67.0
Merger and integration...........................................            84.0                            84.0
Other real estate................................................            45.1          159.6            204.7
Other............................................................           391.6          621.8          1,013.4
                                                                   --------------  --------------  --------------
    Total noninterest expense....................................         1,246.3        2,209.2          3,455.5
                                                                   --------------  --------------  --------------
Income from continuing operations before income taxes and
 cumulative effect of changes in accounting principles...........           328.7          403.2            731.9
Applicable income taxes..........................................           115.7          120.9            236.6
                                                                   --------------  --------------  --------------
Income from continuing operations before cumulative effect of
 changes in accounting principles................................      $    213.0   $      282.3       $    495.3
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
Income from continuing operations before cumulative effect of
 changes in accounting principles applicable to common equity....      $    181.4   $      223.1       $    404.5
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
EARNINGS PER COMMON SHARE
Average common and common equivalent shares......................     124,670,657                     312,722,239
Income from continuing operations before cumulative effect of
 changes in accounting principles................................  $         1.46                  $         1.29
                                                                   --------------                  --------------
                                                                   --------------                  --------------
</TABLE>

    See Notes to Unaudited Pro Forma Condensed Combined Financial Statements

                                      F-6
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
      NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

NOTE A:  ANNOUNCED MERGERS AND ACQUISITIONS
    On  November 5,  1995, First Bank  System, Inc. ("FBS")  signed a definitive
agreement  (the  "Merger  Agreement")  with  First  Interstate  Bancorp  ("First
Interstate") pursuant to which a wholly owned acquisition subsidiary of FBS will
be  merged (the  "Merger") with  and into  First Interstate,  subject to certain
conditions. First Interstate is an interstate financial services holding company
based in Los Angeles,  California, with approximately  $55.1 billion in  assets,
$48.2  billion in deposits and $4.0  billion in shareholders' equity. The Merger
Agreement calls for a tax-free exchange of  2.60 shares of FBS Common Stock  for
each  common share of  First Interstate, or approximately  200 million shares of
FBS  Common  Stock.  The  Merger  will  be  accounted  for  by  FBS  under   the
pooling-of-interests  method of  accounting in accordance  with APB  No. 16 and,
accordingly, this method has been applied  in the unaudited pro forma  condensed
combined  financial statements.  Under this  method of  accounting, the recorded
assets, liabilities, shareholders' equity, income and expenses of FBS and  First
Interstate are combined and recorded at their historical amounts.

    On  August 6,  1995, FBS signed  a definitive purchase  agreement to acquire
FirsTier Financial,  Inc. ("FirsTier"),  a regional  financial services  holding
company  based in  Omaha, Nebraska, with  approximately $3.6  billion in assets,
$2.8 billion in deposits and $376 million in shareholders' equity. The agreement
calls for a  tax-free exchange  of .8829  shares of  FBS common  stock for  each
common  share  of FirsTier,  or 16.6  million  shares of  FBS Common  Stock. The
acquisition of FirsTier will be accounted  for by FBS under the purchase  method
of  accounting in accordance with  APB No. 16 and,  accordingly, this method has
been applied in the unaudited pro forma condensed combined financial statements.
Under this method of accounting, the purchase price will be allocated to  assets
acquired  and liabilities  assumed based  on their  estimated fair  value at the
closing of  the  transaction.  The  historical cost  of  FirsTier's  assets  and
liabilities   approximates   fair  value,   making   mark-to-market  adjustments
immaterial.  Accordingly,  the   historical  cost  of   FirsTier's  assets   and
liabilities have been combined with the historical consolidated balance sheet of
FBS.  Certain adjustments, primarily to accrue for costs related to the FirsTier
acquisition expected to be incurred within one year of closing, are not material
and have  not been  reflected  in the  unaudited  pro forma  condensed  combined
financial statements.

    FBS  completed the acquisitions of two  commercial bank holding companies --
Midwestern Services,  Inc.  and  Southwest  Holdings, Inc.  --  both  in  Omaha,
Nebraska  on November 1, 1995. Together, the  two companies have total assets of
approximately $424  million  and deposits  of  approximately $380  million.  The
acquisitions  were  accounted for  under the  purchase  method of  accounting as
described above.

    On August 22, 1995, FBS signed  a definitive agreement to buy the  corporate
trust relationships and accounts of BankAmerica Corporation ("Corporate Trust").

NOTE B:  BASIS OF PRESENTATION
    The  Unaudited Pro  Forma Condensed Combined  Balance Sheet is  based on the
unaudited consolidated  balance  sheets  of  FBS,  First  Interstate,  FirsTier,
Midwestern Services, Inc. and Southwest Holdings, Inc. as of September 30, 1995.
In  addition, the Unaudited Pro Forma  Condensed Combined Balance Sheet reflects
the  intangible  assets  related  to   the  purchase  of  the  Corporate   Trust
relationships   and  accounts.  The  Unaudited   Pro  Forma  Condensed  Combined
Statements of  Income are  based  on the  unaudited consolidated  statements  of
income of FBS, First Interstate and FirsTier for the nine months ended September
30,  1995, and the audited consolidated statements  of income for the year ended
December 31,  1994. The  Unaudited Pro  Forma Condensed  Combined Statements  of
Income for the years ended December 31, 1993, and 1992, are based on the audited
consolidated statements of

                                      F-7
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE B:  BASIS OF PRESENTATION (CONTINUED)
income  of FBS  and First  Interstate for  such years.  The Unaudited  Pro Forma
Condensed Combined Statements of Income do not include the results of operations
of Midwestern Services,  Inc. and  Southwest Holdings,  Inc., or  the fees  from
Corporate Trust, as they are immaterial.

    FBS  expects to  achieve operating cost  savings by  various means including
reductions in staff,  consolidation of  certain data processing  and other  back
office  operations, and  consolidation and  elimination of  certain duplicate or
excess office facilities in connection with the Merger and the acquisitions. The
operating cost savings are expected to be achieved in various amounts at various
times during the year subsequent to the closing and not ratably over, or at  the
beginning  or  end of,  such periods.  No  adjustment has  been included  in the
unaudited pro forma condensed combined financial statements for the  anticipated
operating  cost savings.  There can be  no assurance  that anticipated operating
cost savings will be achieved in the amounts or at the times anticipated.

    Certain amounts in the historical  financial statements of First  Interstate
and  FirsTier have been reclassified to  conform with FBS's historical financial
statement presentation.

    Financial results  for FBS  for 1994  include merger-related  items with  an
after-tax  effect of $156.9 million ($1.15 per share) associated with the merger
of Metropolitan Financial Corporation. Financial results for FBS in 1993 include
merger-related charges  with an  after-tax  effect of  $50.0 million  ($.37  per
share) associated with the merger of Colorado National Bankshares, Inc. Included
in  FBS's results of operations in  1992 are after-tax merger-related charges of
$81.8 million ($.66  per share) associated  with the merger  of Western  Capital
Investment  Corporation  and  Bank  Shares  Incorporated.  The  First Interstate
results of operations for the nine months ended September 30, 1995, and the year
ended December 31,  1994, include after-tax  charges of $9.5  million and  $87.6
million,  respectively,  related  to the  adoption  of a  restructuring  plan to
improve efficiency and better position First Interstate for the introduction  of
full interstate banking.

    The  FBS results of operations  in 1992 also include  the effect of adopting
two new  accounting  standards:  Statement  of  Financial  Accounting  Standards
("SFAS")  No. 109,  "Accounting for Income  Taxes" and SFAS  No. 106, "Employers
Accounting for Postretirement Benefits Other than Pensions". First  Interstate's
results  of operations in 1993 reflect the adoption of SFAS No. 109 and SFAS No.
106.

    Pro forma  adjustments  related  to these  business  combinations  represent
management's  best estimate  based on  all available  information at  this time.
These adjustments may change as additional information becomes available.

NOTE C:  SECURITIES
   
    Substantially all securities held by  First Interstate will be  reclassified
to  available for sale in accordance  with the pending one-time reclassification
opportunity approved by the Financial Accounting Standards Board at its November
15, 1995  meeting. Following  this one-time  reclassification and  based on  its
preliminary  analysis of First Interstate's financial condition, FBS anticipates
selling approximately $4.0  billion of securities  to reduce First  Interstate's
excess  liquidity and pay down  its existing short-term borrowings. Accordingly,
this adjustment has been reflected in the Unaudited Pro Forma Condensed Combined
Financial Statements as  reductions in  held-to-maturity securities  and in  Fed
funds purchased and securities sold under agreements to repurchase. In addition,
FBS  anticipates recording FirsTier's investment portfolio as available for sale
in connection with the application of purchase accounting.
    

                                      F-8
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE D:  GOODWILL AND OTHER INTANGIBLE ASSETS
    As explained  in  Note B,  purchase  accounting adjustments  may  change  as
additional  information becomes available.  When the ultimate  allocation of the
purchase price  for  FirsTier  is  made, remaining  intangible  assets  will  be
recorded.  Based on current estimates, the  amount of intangible assets relating
to FirsTier is $338  million, calculated as the  purchase price of $714  million
less FirsTier September 30, 1995 common equity of $376 million.

    Amortization  expense relating to the FirsTier acquisition has been included
in the Unaudited Pro Forma Condensed Combined Statements of Income for the  nine
months  ended  September  30,  1995  and  the  year  ended  December  31,  1994.
Amortization expense was calculated based on the intangible asset balance  using
the straight-line method over an average estimated period of benefit of 20 years
which  is comprised of 25  years for goodwill and  10 years for other intangible
assets. The final  allocation of  intangible assets between  goodwill and  other
intangible  assets,  as  well  as  the methods  of  amortization,  has  not been
determined. Subsequent changes to the purchase adjustments, as well as the final
allocation of the intangible assets between goodwill and other intangible assets
will result in an adjustment to goodwill, which will have a corresponding impact
on amortization expense.  Accordingly, pro  forma combined income  for the  nine
month  period ended  September 30,  1995 and the  year ended  December 31, 1994,
would also change, as well as the related pro forma combined earnings per  share
amounts.

NOTE E:  MERGER AND INTEGRATION ACCRUALS
    In  connection with the Merger, FBS expects to incur merger-related costs as
follows:  $175  million  for  severance,  $40  million  for  occupancy/equipment
write-offs,  $210  million  for  conversion costs,  and  $50  million  for other
merger-related charges. In  addition, the combined  allowance for credit  losses
was reduced by $250 million to conform First Interstate's reserve methodology to
that  of FBS  following the  Merger. These  amounts have  been reflected  in the
Unaudited Pro Forma Condensed Combined Balance  Sheet as of September 30,  1995.
These  amounts will be  recorded in the financial  statements in accordance with
generally accepted accounting principles.

    Certain merger-related costs are expected to be recorded in connection  with
the  FirstTier  acquisition. Accruals  or  adjustments have  not,  however, been
reflected in the pro  forma condensed combined  financial statements related  to
this at this time as these costs are not expected to be material.

NOTE F:  SHAREHOLDERS' EQUITY
    In  conjunction with the Merger, FBS will exchange 2.60 shares of FBS Common
Stock for each outstanding share of the common stock of First Interstate. Common
stock in  the Unaudited  Pro Forma  Condensed Combined  Balance Sheet  has  been
adjusted  to reflect  the par  value of FBS  Common Stock  to be  issued, with a
related adjustment to capital surplus. First Interstate's treasury stock will be
retired in conjunction with the Merger and has been eliminated in the  Unaudited
Pro Forma Condensed Combined Balance Sheet. Pro forma combined retained earnings
reflects  the  adjustments  for anticipated  merger-related  costs  as discussed
above.

    In conjunction with  the acquisition  of FirsTier, FBS  will exchange  .8829
shares  of FBS Common Stock for each share  of common stock of FirsTier. As part
of purchase  accounting adjustments,  retained earnings  of FirsTier  have  been
eliminated.  As  previously announced,  FBS intends  to  repurchase a  number of
outstanding shares of FBS  Common Stock approximately equal  to one-half of  the
number  of  shares of  FBS  Common Stock  to be  issued  in connection  with the
FirsTier acquisition. These shares, as well  as all other treasury shares,  will
be  issued  in  connection  with  purchase  acquisitions  and  other  previously
authorized purposes. Accordingly, the treasury stock has been eliminated in  the
Unaudited Pro Forma Condensed Combined Balance Sheet.

                                      F-9
<PAGE>
                            FIRST BANK SYSTEM, INC.
                      MERGER WITH FIRST INTERSTATE BANCORP
NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE G:  INCOME TAX PROVISIONS
    The income tax provision for adjustments related to the FirsTier acquisition
reflected in the Unaudited Pro Forma Condensed Combined Statements of Income has
been computed at FBS's effective combined federal and state marginal tax rate.

                                      F-10
<PAGE>
                                                                      APPENDIX A

                          AGREEMENT AND PLAN OF MERGER

    AGREEMENT  AND PLAN OF  MERGER, dated as  of November 5,  1995, by and among
First Bank System, Inc., a  Delaware corporation ("Parent"), Eleven  Acquisition
Corp.,  a Delaware corporation and a  wholly owned subsidiary of Parent ("Merger
Sub"), and First Interstate Bancorp, a Delaware corporation ("Subject Company").

    WHEREAS, the  Boards  of  Directors  of  Parent  and  Subject  Company  have
determined  that it is in  the best interests of  their respective companies and
their stockholders to consummate the strategic business combination  transaction
provided  for  herein  in  which  Merger Sub  will,  subject  to  the  terms and
conditions set forth herein, merge (the "Merger") with and into Subject Company,
so that Subject Company is the surviving corporation in the Merger; and

    WHEREAS, as a  condition to, and  immediately after the  execution of,  this
Agreement,  Parent  and Subject  Company are  entering into  (i) a  Parent Stock
Option Agreement (the "Parent  Option Agreement") pursuant  to which Parent  has
granted  Subject Company  an option exercisable  upon the  occurrence of certain
events and (ii) the Parent Fee Letter (as defined below); and

    WHEREAS, as a  condition to, and  immediately after the  execution of,  this
Agreement,  Parent and Subject  Company are entering into  (i) a Subject Company
Stock Option Agreement  (the "Subject  Company Option  Agreement"; and  together
with  the Parent  Option Agreement, the  "Option Agreements")  pursuant to which
Subject Company has granted Parent an option exercisable upon the occurrence  of
certain events and (ii) the Subject Company Fee Letter (as defined below); and

    WHEREAS,  the parties desire to make certain representations, warranties and
agreements  in  connection  with  the  Merger  and  also  to  prescribe  certain
conditions to the Merger.

    NOW,  THEREFORE, in consideration of  the mutual covenants, representations,
warranties and agreements contained  herein, and intending  to be legally  bound
hereby, the parties agree as follows:

                                   ARTICLE I.
                                   THE MERGER

    1.1   THE MERGER.  Subject to the terms and conditions of this Agreement, in
accordance with  the  Delaware General  Corporation  Law (the  "DGCL"),  at  the
Effective  Time (as defined in Section 1.2  hereof), Merger Sub shall merge with
and into Subject  Company. Subject  Company shall be  the surviving  corporation
(hereinafter  sometimes called the  "Surviving Corporation") in  the Merger, and
shall continue its corporate existence under the laws of the State of  Delaware.
The  name of  the Surviving Corporation  shall be Eleven  Acquisition Corp. Upon
consummation of the Merger, the separate corporate existence of Merger Sub shall
terminate.

    1.2  EFFECTIVE TIME.  The Merger shall become effective as set forth in  the
certificate  of merger (the  "Certificate of Merger") which  shall be filed with
the Secretary of State  of the State of  Delaware (the "Delaware Secretary")  on
the  Closing Date (as defined in Section  9.1 hereof). The term "Effective Time"
shall be the date and  time when the Merger becomes  effective, as set forth  in
the Certificate of Merger.

    1.3   EFFECTS OF  THE MERGER.  At  and after the  Effective Time, the Merger
shall have the effects set forth in the DGCL.

                                      A-1
<PAGE>
    1.4  CONVERSION OF SUBJECT  COMPANY COMMON STOCK, SUBJECT COMPANY  PREFERRED
STOCK.   At the Effective  Time, subject to Section  2.2(e) hereof, by virtue of
the Merger and without  any action on  the part of  Parent, Merger Sub,  Subject
Company or the holder of any of the following securities:

    (a)  Each share of the  common stock, par value  $2.00 per share, of Subject
Company (the "Subject Company Common Stock") issued and outstanding  immediately
prior  to the Effective Time (other than  shares of Subject Company Common Stock
held (x) in Subject Company's treasury  or (y) directly or indirectly by  Parent
or  Subject Company or  any of their respective  Subsidiaries (as defined below)
(except for  Trust Account  Shares and  DPC shares,  as such  terms are  defined
below), together with the rights (the "Subject Company Rights") attached thereto
issued  pursuant to  the Rights  Agreement, dated  as of  November 21,  1988, as
amended, between  Subject Company  and First  Interstate Bank,  Ltd., as  Rights
Agent  (the "Subject  Company Rights  Agreement"), shall  be converted  into the
right to receive 2.60 shares (the "Common Exchange Ratio") of the common  stock,
par  value $1.25 per share, of Parent (the "Parent Common Stock"), together with
the number of  rights ("Parent  Rights") issued  pursuant to  the Parent  Rights
Agreement (as defined in Section 4.2 hereof) associated therewith.

    (b)  Each share of 9.875% preferred stock, Series F, of Subject Company (the
"Subject Company 9.875% Preferred") issued and outstanding immediately prior  to
the  Effective Time shall  be converted into  the right to  receive one share of
9.875% preferred stock of Parent (the  "Parent 9.875% Preferred"). The terms  of
the  Parent 9.875% Preferred shall be substantially the same as the terms of the
Subject Company  9.875% Preferred,  PROVIDED, HOWEVER,  that the  terms of  such
Parent  9.875%  Preferred shall  have such  voting rights  as the  parties shall
reasonably agree are necessary in order to ensure that the Merger constitutes  a
reorganization within the meaning of Section 368(a) of the Code.

    (c)  Each share of 9.0%  preferred stock, Series G,  of Subject Company (the
"Subject Company 9.0% Preferred," and  together with the Subject Company  9.875%
Preferred,  the  "Subject  Company  Preferred  Stock")  issued  and  outstanding
immediately prior to  the Effective Time  shall be converted  into the right  to
receive  one  share  of  9.0%  preferred  stock  of  Parent  (the  "Parent  9.0%
Preferred," and  together with  the  Parent 9.875%  Preferred, the  "Parent  New
Preferred").  The terms of the Parent  9.0% Preferred shall be substantially the
same as the terms of the Subject Company 9.0% Preferred, PROVIDED, HOWEVER, that
the terms of such  Parent 9.0% Preferred  shall have such  voting rights as  the
parties  shall reasonably agree are necessary in order to ensure that the Merger
constitutes a reorganization within the meaning  of Section 368(a) of the  Code.
For  purposes of this Agreement (i) the Subject Company Common Stock and Subject
Company Preferred Stock are referred to  herein as the "Subject Company  Capital
Stock,"  and (ii) the Parent Common Stock and Parent Preferred Stock (as defined
below) are collectively referred to as the "Parent Capital Stock."

    (d) All of the shares of Subject Company Common Stock converted into  Parent
Common Stock pursuant to this Article I shall no longer be outstanding and shall
automatically  be cancelled and shall  cease to exist as  of the Effective Time,
and each certificate (each a  "Common Certificate") previously representing  any
such shares of Subject Company Common Stock shall thereafter represent the right
to  receive (i) a certificate representing the  number of whole shares of Parent
Common Stock and  (ii) the  cash in  lieu of  fractional shares  into which  the
shares  of Subject Company  Common Stock represented  by such Common Certificate
have been converted  pursuant to  this Section  1.4 and  Section 2.2(e)  hereof.
Common  Certificates previously  representing shares  of Subject  Company Common
Stock shall be exchanged  for certificates representing  whole shares of  Parent
Common  Stock  and cash  in lieu  of fractional  shares issued  in consideration
therefor upon  the surrender  of  such Common  Certificates in  accordance  with
Section 2.2 hereof, without any interest thereon. If prior to the Effective Time
the  outstanding  shares  of  Parent Common  Stock  shall  have  been increased,
decreased, changed into or exchanged for a different number or kind of shares or
securities as a result of a reorganization, recapitalization,  reclassification,
stock  dividend, stock  split, reverse stock  split, or other  similar change in
Parent's capitalization, then an appropriate and proportionate adjustment  shall
be made to the Common Exchange Ratio.

                                      A-2
<PAGE>
    (e)  All of  the shares  of Subject  Company Preferred  Stock converted into
Parent New Preferred pursuant to this  Article I shall no longer be  outstanding
and  shall  automatically  be cancelled  and  shall  cease to  exist  as  of the
Effective Time,  and  each  certificate (each  a  "Preferred  Certificate,"  and
collectively  with  the  Common  Certificates,  the  "Certificates")  previously
representing any such shares of Subject Company Preferred Stock shall thereafter
represent the right to receive a  certificate representing the number of  shares
of  corresponding Parent New Preferred into  which the shares of Subject Company
Preferred Stock represented  by such Preferred  Certificate have been  converted
pursuant  to this  Section 1.4.  Preferred Certificates  previously representing
shares of Subject Company  Preferred Stock shall  be exchanged for  certificates
representing   shares   of  corresponding   Parent   New  Preferred   issued  in
consideration therefor  upon the  surrender of  such Preferred  Certificates  in
accordance with Section 2.2 hereof, without any interest thereon.

    (f)  At the Effective Time, all shares of Subject Company Capital Stock that
are owned by Subject Company as treasury stock and all shares of Subject Company
Capital Stock that are owned directly or indirectly by Parent or Subject Company
or any of their  respective Subsidiaries (other than  shares of Subject  Company
Capital  Stock held directly  or indirectly in  trust accounts, managed accounts
and the like  or otherwise held  in a fiduciary  capacity that are  beneficially
owned by third parties (any such shares, and shares of Parent Common Stock which
are  similarly held,  whether held directly  or indirectly by  Parent or Subject
Company or  any of  their respective  Subsidiaries, as  the case  may be,  being
referred  to herein  as "Trust  Account Shares")  and other  than any  shares of
Subject Company Capital Stock held by Parent or Subject Company or any of  their
respective  Subsidiaries in  respect of a  debt previously  contracted (any such
shares of Subject Company Capital Stock, and shares of Parent Common Stock which
are similarly held,  whether held directly  or indirectly by  Parent or  Subject
Company  or any  of their respective  Subsidiaries, being referred  to herein as
"DPC Shares")) shall  be cancelled  and shall  cease to  exist and  no stock  of
Parent  or  other consideration  shall be  delivered  in exchange  therefor. All
shares of Parent Common Stock  that are owned by Subject  Company or any of  its
Subsidiaries  (other  than Trust  Account Shares  and  DPC Shares)  shall become
treasury stock of Parent.

    (g) At the Effective  Time, Parent shall assume  the obligations of  Subject
Company  under the  Deposit Agreement,  dated as  of November  14, 1991, between
Subject Company and First Interstate Bank of California, as depositary (relating
to the Subject Company 9.875% Preferred) and the Deposit Agreement, dated as  of
May  29, 1992, between Subject Company  and First Interstate Bank of California,
as depositary (relating  to the  Subject Company 9.0%  Preferred). Parent  shall
instruct  the  applicable  depositary  to  treat  the  shares  of  Parent 9.875%
Preferred and Parent 9.0% Preferred received by such depositary in exchange  for
and  upon  conversion of  the  shares of  Subject  Company 9.875%  Preferred and
Subject Company 9.0% Preferred, respectively, as new deposited securities  under
the  applicable deposit agreement. In accordance  with the terms of the relevant
deposit agreement,  the depositary  receipts then  outstanding shall  thereafter
represent  the shares  of Parent 9.875%  Preferred and Parent  9.0% Preferred so
received upon conversion and exchange for  the shares of Subject Company  9.875%
Preferred and Subject Company 9.0% Preferred, respectively. Parent shall request
that  such depositary call for  the surrender of all  outstanding receipts to be
exchanged for new  receipts (the  "New Parent  Depositary Shares")  specifically
describing the relevant series of Parent New Preferred.

    1.5    PARENT  COMMON STOCK;  PARENT  PREFERRED  STOCK.   At  and  after the
Effective Time,  each share  of Parent  Common Stock  and each  share of  Parent
Preferred  Stock issued and outstanding immediately  prior to the Effective Time
shall remain an issued and outstanding share of common stock or preferred stock,
as the case may be, of Parent and shall not be affected by the Merger.

    1.6  MERGER  SUB STOCK.   At  and after the  Effective Time,  each share  of
Merger  Sub common stock issued and  outstanding immediately prior to the Merger
shall remain issued and outstanding and  shall constitute a share of the  common
stock of the Surviving Corporation.

                                      A-3
<PAGE>
    1.7   OPTIONS.   (a) At the  Effective Time, each  option granted by Subject
Company to purchase  shares of  Subject Company  Common Stock  (each a  "Subject
Company  Option") which is outstanding and unexercised immediately prior thereto
shall cease to  represent a right  to acquire shares  of Subject Company  Common
Stock  and shall be converted automatically into an option to purchase shares of
Parent Common Stock in an amount and at an exercise price determined as provided
below  (and  otherwise  subject  to  the  terms  of  the  Subject  Company  1995
Performance  Stock Plan,  the Subject  Company 1991  Performance Stock  Plan (as
amended), the  Subject Company  1988 Performance  Stock Plan  (as amended),  the
Subject  Company 1983 Performance  Stock Plan (as  amended), the Subject Company
Performance Stock Plan of 1980 (as amended and restated) and the Subject Company
1991 Director  Option  Plan  (as amended  and  restated),  as the  case  may  be
(collectively,  the "Subject  Company 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 Merger as and to the extent required by such plans and agreements)):

        (1) the number of shares of Parent Common Stock to be subject to the new
    option shall be  equal to the  product of  the number of  shares of  Subject
    Company  Common Stock subject to the original option and the Common Exchange
    Ratio, provided that any fractional shares of Parent Common Stock  resulting
    from such multiplication shall be rounded down to the nearest share; and

        (2)  the exercise price per  share of Parent Common  Stock under the new
    option shall be  equal to the  exercise price per  share of Subject  Company
    Common Stock under the original option divided by the Common Exchange Ratio,
    provided that such exercise price shall be rounded up to the nearest cent.

    The  adjustment  provided  herein  with respect  to  any  options  which are
"incentive stock options"  (as defined in  Section 422 of  the Internal  Revenue
Code  of 1986, as amended (the "Code")) shall  be and is intended to be effected
in a manner  which is consistent  with Section 424(a)  of the Code  and, to  the
extent  it is not so consistent, such  Section 424(a) shall override anything to
the contrary contained herein.  The duration and other  terms of the new  option
shall  be the  same as  the original option  (subject to  Section 6.7(b) hereof)
except that all references to Subject  Company shall be deemed to be  references
to Parent.

    1.8    CERTIFICATES  OF  INCORPORATION.   At  the  Effective  Time,  (i) the
Certificate of Incorporation of Subject Company,  as in effect at the  Effective
Time, shall be the Certificate of Incorporation of the Surviving Corporation and
(ii)  the  Certificate of  Incorporation of  Parent, as  amended to  reflect the
amendments thereto contemplated by this Agreement and as otherwise in effect  at
the Effective Time, shall be the Certificate of Incorporation of Parent.

    1.9   BYLAWS.  At  the Effective Time, the Bylaws  of Subject Company, as in
effect immediately  prior to  the Effective  Time, shall  be the  Bylaws of  the
Surviving  Corporation until  thereafter amended  in accordance  with applicable
law.

    1.10  TAX CONSEQUENCES.  It is  intended that the Merger shall constitute  a
reorganization  within the meaning of Section 368(a)  of the Code, and that this
Agreement shall constitute a "plan of reorganization" for purposes of the Code.

    1.11  MANAGEMENT  SUCCESSION.   At the  Effective Time,  John F.  Grundhofer
shall  be Chairman of  the Board and  Chief Executive Officer  of Parent. At the
Effective Time, William E. B. Siart  shall be the President and Chief  Operating
Officer of Parent.

    1.12    BOARD OF  DIRECTORS.   At the  Effective Time,  the total  number of
persons serving  on  the  Board of  Directors  of  Parent shall  be  20  (unless
otherwise  agreed in writing by the parties hereto prior to the Effective Time),
ten of whom shall be Parent Directors  and ten of whom shall be Subject  Company
Directors  (as such terms are defined below).  The persons to serve initially on
the Board of Directors of Parent at the Effective Time who are Parent  Directors
shall  be selected  solely by  and at  the absolute  discretion of  the Board of
Directors   of   Parent    prior   to    the   Effective    Time   from    among

                                      A-4
<PAGE>
persons  who  are members  of  the Board  of Directors  of  Parent prior  to the
Effective Time; and the persons to serve on the Board of Directors of Parent  at
the Effective Time who are Subject Company Directors shall be selected solely by
and  at the  absolute discretion  of the Board  of Directors  of Subject Company
prior to the Effective Time from among  persons who are members of the Board  of
Directors  of Subject Company prior to the Effective Time. Thereafter, the Board
of Directors of  Parent shall consist  of an  even number of  directors. To  the
extent  practicable,  from and  after the  Effective Time,  and until  the third
anniversary thereof, each class  of directors of Parent  shall contain an  equal
number  of Parent Directors and Subject Company Directors, and each Committee of
the Board  of  Directors of  Parent  shall contain  an  equal number  of  Parent
Directors  and Subject Company  Directors. If at any  time during the three-year
period following the Effective Time the  number of Parent Directors and  Subject
Company  Directors serving, or  that would be serving  following the next annual
meeting of  stockholders, as  directors of  Parent, would  not be  equal,  then,
subject to the fiduciary duties of the directors, the Board of Directors and the
Nominating  Committee of Parent shall take such steps as may be requested by the
Parent Directors  (if the  number of  Parent Directors  is, or  would  otherwise
become,  less  than the  number  of Subject  Company  Directors) or  the Subject
Company Directors  (if the  number of  Subject Company  Directors is,  or  would
otherwise become, less than the number of Parent Directors) to assure that there
shall  be an  equal number  of Parent  Directors and  Subject Company Directors,
including by nominating and/or  electing a person or  persons designated by  the
Parent  Directors  or the  Subject Company  Directors,  as applicable.  The term
"Parent Directors" means (i) any person serving as a director of Parent prior to
the Effective Time who remains  a director of Parent  at the Effective Time  and
(ii)  any person who  becomes a director  of Parent pursuant  to the immediately
preceding sentence and who is designated  by the Parent Directors; and the  term
"Subject Company Director" means (i) any person serving as a director of Subject
Company  prior to  the Effective Time  who becomes  a director of  Parent at the
Effective Time and (ii) any person who becomes a director of Parent pursuant  to
the  immediately preceding sentence and who is designated by the Subject Company
Directors.

    1.13  NAME.  Effective immediately upon the consummation of the Merger,  the
name of Parent shall be First Interstate Bancorp.

                                  ARTICLE II.
                               EXCHANGE OF SHARES

    2.1   PARENT TO MAKE  SHARES AVAILABLE.  At or  prior to the Effective Time,
Parent shall deposit,  or shall  cause to  be deposited,  with a  bank or  trust
company  which will be  a Subsidiary of  Parent (the "Exchange  Agent"), for the
benefit of the  holders of Certificates,  for exchange in  accordance with  this
Article  II, certificates  representing the  shares of  Parent Common  Stock and
Parent New Preferred and an estimated amount  of cash in lieu of any  fractional
shares  (the  cash payable  in lieu  of fractional  shares and  certificates for
shares of  Parent Common  Stock  and Parent  New  Preferred, together  with  any
dividends  or distributions with respect  thereto, being hereinafter referred to
as the "Exchange Fund") to be issued  pursuant to Section 1.4 and paid  pursuant
to  Section 2.2(a) in exchange for outstanding shares of Subject Company Capital
Stock.

    2.2  EXCHANGE OF  SHARES.  (a)  As soon as  practicable after the  Effective
Time,  and in  no event  later than ten  business days  thereafter, the Exchange
Agent shall mail to  each holder of  record of a  Certificate or Certificates  a
form letter of transmittal (which shall specify that delivery shall be effected,
and risk of loss and title to the Certificates shall pass, only upon delivery of
the  Certificates to the  Exchange Agent) and instructions  for use in effecting
the surrender of the Certificates in exchange for certificates representing,  as
the  case may be, the shares of Parent  Common Stock or Parent New Preferred and
the cash in lieu of fractional shares, if any, into which the shares of  Subject
Company Capital Stock represented by such Certificate or Certificates shall have
been   converted  pursuant  to  this  Agreement.  Upon  proper  surrender  of  a
Certificate for exchange and cancellation  to the Exchange Agent, together  with
such properly completed letter of transmittal, duly executed, the holder of such

                                      A-5
<PAGE>
Certificate  shall be entitled  to receive in  exchange therefor, as applicable,
(i) a certificate representing that number of shares of Parent Common Stock,  if
any,  to which  such holder  of Subject Company  Common Stock  shall have become
entitled pursuant  to the  provisions  of Article  I hereof,  (ii)  certificates
representing  that number of  shares of Parent 9.875%  Preferred and Parent 9.0%
Preferred, if any, to which such holder of Subject Company Preferred Stock shall
have become entitled pursuant to the provisions of Article I hereof and (iii)  a
check  representing the  amount of  cash in lieu  of fractional  shares, if any,
which such  holder  has the  right  to receive  in  respect of  the  Certificate
surrendered  pursuant to the provisions of  this Article II, and the Certificate
so surrendered shall forthwith be cancelled. No interest will be paid or accrued
on the cash in lieu of fractional shares and unpaid dividends and distributions,
if any, payable to holders of Certificates.

    (b) No  dividends  or other  distributions  with  a record  date  after  the
Effective Time with respect to Parent Common Stock or Parent New Preferred shall
be  paid to the holder of any unsurrendered Certificate until the holder thereof
shall surrender such Certificate in accordance  with this Article II. After  the
surrender of a Certificate in accordance with this Article II, the record holder
thereof  shall be entitled to receive any such dividends or other distributions,
without any interest thereon, which theretofore had become payable with  respect
to  shares of Parent  Common Stock or  Parent New Preferred  represented by such
Certificate.

    (c) If any certificate representing shares of Parent Common Stock or  Parent
New Preferred is to be issued in a name other than that in which the Certificate
surrendered  in exchange therefor is registered, it  shall be a condition of the
issuance thereof that the Certificate so surrendered shall be properly  endorsed
(or  accompanied  by an  appropriate instrument  of  transfer) and  otherwise in
proper form for transfer, and that the person requesting such exchange shall pay
to the Exchange Agent in advance any transfer or other taxes required by  reason
of  the issuance of a certificate representing  shares of Parent Common Stock or
Parent New Preferred in any name other than that of the registered holder of the
Certificate surrendered, or required for any other reason, or shall establish to
the satisfaction of the  Exchange Agent that  such tax has been  paid or is  not
payable.

    (d) At or after the Effective Time, there shall be no transfers on the stock
transfer books of Subject Company of the shares of Subject Company Capital Stock
which  were issued and outstanding immediately  prior to the Effective Time. If,
after the Effective  Time, Certificates representing  such shares are  presented
for  transfer to the Exchange  Agent, they shall be  cancelled and exchanged for
certificates representing shares  of Parent  Capital Stock as  provided in  this
Article II.

    (e)   Notwithstanding  anything   to  the  contrary   contained  herein,  no
certificates or  scrip representing  fractional shares  of Parent  Common  Stock
shall  be  issued upon  the surrender  for exchange  of Common  Certificates, no
dividend or distribution with respect to Parent Common Stock shall be payable on
or with respect  to any fractional  share, and such  fractional share  interests
shall  not  entitle the  owner  thereof to  vote  or to  any  other rights  of a
stockholder of Parent.  In lieu of  the issuance of  any such fractional  share,
Parent  shall pay  to each former  stockholder of Subject  Company who otherwise
would be entitled to receive such fractional share an amount in cash  determined
by multiplying (i) the average of the closing sale prices of Parent Common Stock
on  the New  York Stock  Exchange (the  "NYSE") as  reported by  The Wall Street
Journal for the five  trading days immediately preceding  the date on which  the
Effective  Time occurs by (ii) the fraction of a share of Parent Common Stock to
which such holder would otherwise be entitled to receive pursuant to Section 1.4
hereto.

    (f) Any  portion  of  the  Exchange  Fund  that  remains  unclaimed  by  the
stockholders of Subject Company for twelve months after the Effective Time shall
be  paid to Parent. Any stockholders of Subject Company who have not theretofore
complied with this Article II shall  thereafter look only to Parent for  payment
of  the shares of Parent  Common Stock or Parent New  Preferred, cash in lieu of
any fractional  shares and  unpaid  dividends and  distributions on  the  Parent
Common  Stock or Parent  New Preferred deliverable  in respect of  each share of
Subject Company Common Stock or Subject Company Preferred Stock, as the case may
be, such stockholder  holds as determined  pursuant to this  Agreement, in  each
case,  without any  interest thereon.  Notwithstanding anything  to the contrary

                                      A-6
<PAGE>
contained herein, none  of Parent, Subject  Company, the Exchange  Agent or  any
other  person shall be liable to any  former holder of shares of Subject Company
Common Stock or Subject Company Preferred for any amount properly delivered to a
public official pursuant  to applicable abandoned  property, escheat or  similar
laws.

    (g)  In the event any Certificate shall have been lost, stolen or destroyed,
upon the  making of  an  affidavit of  that fact  by  the person  claiming  such
Certificate  to be  lost, stolen  or destroyed and,  if required  by Parent, the
posting by such  person of  a bond  in such amount  as Parent  may determine  is
reasonably  necessary as indemnity against any claim that may be made against it
with respect to such Certificate, the Exchange Agent will issue in exchange  for
such lost, stolen or destroyed Certificate the shares of Parent Common Stock and
cash  in lieu of fractional shares or Parent  New Preferred, as the case may be,
deliverable in respect thereof pursuant to this Agreement.

                                  ARTICLE III.
               REPRESENTATIONS AND WARRANTIES OF SUBJECT COMPANY

    Subject Company hereby represents and warrants to Parent as follows:

    3.1  CORPORATE  ORGANIZATION.   (a) Subject  Company is  a corporation  duly
organized,  validly existing and in good standing under the laws of the State of
Delaware. Subject Company has the corporate power and authority to own or  lease
all of its properties and assets and to carry on its business as it is now being
conducted, and is duly licensed or qualified to do business in each jurisdiction
in which the nature of the business conducted by it or the character or location
of  the properties  and assets  owned or  leased by  it makes  such licensing or
qualification necessary, except where the failure to be so licensed or qualified
would not have or reasonably be expected  to have a Material Adverse Effect  (as
defined below) on Subject Company. As used in this Agreement, the term "Material
Adverse  Effect" means, with  respect to Parent, Merger  Sub, Subject Company or
the Surviving Corporation, as the case may be, a material adverse effect on  the
business,  results of  operations or financial  condition of such  party and its
Subsidiaries taken  as a  whole or  a material  adverse effect  on such  party's
ability  to consummate the transactions  contemplated hereby; PROVIDED, HOWEVER,
that in determining whether a Material  Adverse Effect has occurred there  shall
be  excluded any effect  on the referenced party  the cause of  which is (i) any
change  in  banking  and   similar  laws,  rules   or  regulations  of   general
applicability  or interpretations thereof by courts or governmental authorities,
(ii) any  change  in  generally accepted  accounting  principles  or  regulatory
accounting  requirements applicable to banks, thrifts or their holding companies
generally, (iii) any  action or  omission of Subject  Company or  Parent or  any
Subsidiary  of either of them taken with  the prior written consent of Parent or
Subject Company, as applicable, in contemplation of the Merger, (iv) any changes
in general  economic  conditions  affecting  banks,  thrifts  or  their  holding
companies  generally and (v) in  the case of members  of the Savings Association
Insurance Fund  ("SAIF")  of  the Federal  Deposit  Insurance  Corporation,  the
funding  of the SAIF. As used in this Agreement, the word "Subsidiary" when used
with respect to  any party  means any  bank, corporation,  partnership or  other
organization, whether incorporated or unincorporated, which is consolidated with
such  party for financial reporting purposes. Subject Company is duly registered
as a bank holding company under the Bank Holding Company Act of 1956, as amended
(the "BHC Act"). The  copies of the Certificate  of Incorporation and Bylaws  of
Subject  Company which have previously been  made available to Parent, are true,
complete and correct copies  of such documents  as in effect as  of the date  of
this Agreement.

    (b)  Each  Subject  Company Subsidiary  (i)  is duly  organized  and validly
existing  as  a  bank,  corporation  or  partnership  under  the  laws  of   its
jurisdiction  of organization, (ii) is duly qualified to do business and in good
standing in all jurisdictions (whether  federal, state, local or foreign)  where
its  ownership or leasing of property or the conduct of its business requires it
to be so qualified  and in which the  failure to be so  qualified would have  or
reasonably be expected to have a Material Adverse Effect on Subject Company, and
(iii)  has  all requisite  corporate power  and  authority to  own or  lease its
properties and assets and to carry on its business as now conducted.

                                      A-7
<PAGE>
    3.2  CAPITALIZATION.   (a) The authorized capital  stock of Subject  Company
consists  of  250,000,000 shares  of  Subject Company  Common  Stock, 15,000,000
shares of preferred stock, no par value, and 43,500,000 shares of Class A Common
Stock, par value  $0.01 per  share ("Class  A Common  Stock"). At  the close  of
business  on October 31,  1995, there were 75,744,254  shares of Subject Company
Common Stock outstanding,  1,750,000 shares of  Subject Company Preferred  Stock
outstanding   (evidenced  by  14,000,000   Subject  Company  Depositary  Shares,
8,000,000 of which each  represent a one-eighth interest  in a share of  Subject
Company  9.875% Preferred  and 6,000,000  of which  each represent  a one-eighth
interest in a share of Subject Company 9.0% Cumulative Preferred), no Shares  of
Class A Common Stock outstanding, and 8,541,742 shares of Subject Company Common
Stock  held in Subject Company's treasury. As  of October 31, 1995, no shares of
Subject Company Common Stock  or Subject Company  Preferred Stock were  reserved
for  issuance, except  (i) 392,936 shares  of Subject Company  Common Stock were
reserved for issuance  pursuant to Subject  Company's dividend reinvestment  and
stock purchase plans, (ii) 3,740,384 shares of Subject Company Common Stock were
reserved for issuance upon the exercise of stock options pursuant to the Subject
Company Stock Option Plans, and (iii) the shares of Subject Company Common Stock
reserved for issuance upon exercise of the Subject Company Rights distributed to
holders  of Subject Company Common Stock  pursuant to the Subject Company Rights
Agreement. All of the  issued and outstanding shares  of Subject Company  Common
Stock  and Subject Company Preferred Stock have been duly authorized and validly
issued and are fully paid, nonassessable and free of preemptive rights, with  no
personal  liability attaching to the  ownership thereof. As of  the date of this
Agreement, except (i)  as set  forth in Section  3.2(a) of  the Subject  Company
Disclosure  Schedule (as  defined below),  (ii) for  the Subject  Company Option
Agreement, (iii) for the  Subject Company Rights Agreement  (a true and  correct
copy  of which,  including all  amendments thereto,  has been  made available to
Parent) and (iv) as set forth elsewhere in this Section 3.2(a), Subject  Company
does  not  have and  is  not bound  by  any outstanding  subscriptions, options,
warrants, calls,  commitments or  agreements of  any character  calling for  the
purchase  or issuance of any  shares of Subject Company  Common Stock or Subject
Company Preferred Stock or any other equity securities of Subject Company or any
securities representing the right to purchase or otherwise receive any shares of
Subject Company Common Stock or Subject  Company Preferred Stock. Except (i)  as
set  forth  in Section  3.2(a)  of the  disclosure  schedule of  Subject Company
delivered to  Parent  concurrently  herewith (the  "Subject  Company  Disclosure
Schedule"),  (ii)  for  options  permitted  by  this  Agreement  to  be  granted
subsequent to the  date of  this Agreement, and  (iii) for  the Subject  Company
Option  Agreement, since  October 31,  1995 Subject  Company has  not issued any
shares of its capital  stock or any securities  convertible into or  exercisable
for  any shares of its  capital stock, other than  pursuant to Subject Company's
dividend reinvestment and stock purchase  plans, the exercise of employee  stock
options  granted prior to  such date and  as disclosed in  Section 3.2(a) of the
Subject Company Disclosure Schedule, and the issuance of rights pursuant to  the
Subject Company Rights Agreement.

    (b)  Except as set forth in Section 3.2(b) of the Subject Company Disclosure
Schedule, Subject Company  owns, directly  or indirectly,  at least  99% of  the
issued  and outstanding shares of capital stock  of each of the material Subject
Company Subsidiaries,  free  and  clear of  any  liens,  charges,  encumbrances,
adverse rights or claims and security interests whatsoever ("Liens"), and all of
such  shares  are  duly  authorized  and  validly  issued  and  are  fully paid,
nonassessable  and  free  of  preemptive  rights,  with  no  personal  liability
attaching  to the  ownership thereof.  No Subject  Company Subsidiary  has or is
bound by any outstanding subscriptions, options, warrants, calls, commitments or
agreements of any character calling for  the purchase or issuance of any  shares
of  capital  stock  or any  other  equity  security of  such  Subsidiary  or any
securities representing the right to purchase or otherwise receive any shares of
capital stock  or  any  other  equity  security  of  such  Subsidiary.  Assuming
compliance  by Parent with Section 1.7 hereof, at the Effective Time, there will
not be any outstanding subscriptions,  options, warrants, calls, commitments  or
agreements  of any character by which Subject Company or any of its Subsidiaries
will be bound calling for the purchase or issuance of any shares of the  capital
stock of Subject Company or any of its Subsidiaries.

                                      A-8
<PAGE>
    3.3   AUTHORITY; NO VIOLATION.  (a) Subject Company has full corporate power
and authority to  execute and deliver  this Agreement, the  Fee Letter, of  even
date  herewith, between  Parent and  Subject Company  (the "Subject  Company Fee
Letter") pursuant to  which Subject  Company will in  certain circumstances  pay
certain  amounts to Parent,  the Subject Company Option  Agreement and the other
documents contemplated  to  be executed  and  delivered by  Subject  Company  in
connection  with the transactions contemplated  hereby (this Agreement, together
with the Subject Company  Fee Letter, the Subject  Company Option Agreement  and
such  other documents,  collectively, the  "Subject Company  Documents"), and to
consummate the transactions contemplated hereby  and thereby. The execution  and
delivery  of each of the  Subject Company Documents and  the consummation of the
transactions contemplated hereby and thereby have been duly and validly approved
by the Board of Directors of Subject Company. The Board of Directors of  Subject
Company has directed that the agreement of merger (within the meaning of Section
251  of the DGCL) contained in  this Agreement and the transactions contemplated
hereby be submitted to Subject Company's stockholders for approval at a  meeting
of  such stockholders  and, except  for the  adoption of  this Agreement  by the
affirmative vote  of the  holders of  a majority  of the  outstanding shares  of
Subject  Company Common  Stock, no  other corporate  proceedings on  the part of
Subject Company are necessary  to approve the Subject  Company Documents and  to
consummate the transactions contemplated hereby and thereby. Each of the Subject
Company  Documents has been  duly and validly executed  and delivered by Subject
Company and (assuming due  authorization, execution and  delivery by Parent  and
Merger Sub) this Agreement constitutes a valid and binding obligation of Subject
Company,  enforceable  against Subject  Company  in accordance  with  its 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.

    (b)  Except as set forth in Section 3.3(b) of the Subject Company Disclosure
Schedule, neither the execution and delivery of the Subject Company Documents by
Subject Company  nor the  consummation by  Subject Company  of the  transactions
contemplated  hereby and thereby, nor compliance  by Subject Company with any of
the terms or provisions hereof or thereof, will (i) violate any provision of the
Certificate of Incorporation or Bylaws of Subject Company or any of the  similar
governing  documents  of  any of  its  Subsidiaries  or (ii)  assuming  that the
consents and approvals referred to in Section 3.4 are duly obtained, (x) violate
any statute, code, ordinance, rule, regulation, judgment, order, writ, decree or
injunction applicable to Subject  Company or any of  its Subsidiaries or any  of
their  respective properties or assets, or (y) violate, conflict with, result in
a breach of  any provision of  or the loss  of any benefit  under, constitute  a
default  (or  an event  which,  with notice  or lapse  of  time, or  both, would
constitute a  default)  under,  result in  the  termination  of or  a  right  of
termination  or cancellation under,  accelerate the performance  required by, or
result in the  creation of any  Lien upon  any of the  respective properties  or
assets  of Subject Company or  any of its Subsidiaries  under, any of the terms,
conditions or provisions of any note, bond, mortgage, indenture, deed of  trust,
license,  lease, agreement  or other instrument  or obligation  to which Subject
Company or any of its Subsidiaries is a party, or by which they or any of  their
respective properties or assets may be bound or affected, except (in the case of
clause  (ii) above) for such violations,  conflicts, breaches or defaults which,
either individually or in the aggregate, will not have and would not  reasonably
be expected to have a Material Adverse Effect on Subject Company.

    3.4   CONSENTS AND APPROVALS.  Except for (i) the filing of applications and
notices, as  applicable, with  the Board  of Governors  of the  Federal  Reserve
System  (the "Federal  Reserve Board")  under the BHC  Act and  approval of such
applications and notices, (ii) the filing of any requisite applications with the
Office of the Comptroller of the Currency  (the "OCC") and the approval of  such
applications,  (iii) the filing of any required applications or notices with any
state agencies  and  approval  of  such applications  and  notices  (the  "State
Approvals"),  (iv) the filing  of any requisite applications  with the Office of
Thrift Supervision and the  approval of such applications,  (v) approval of  the
listing of the Parent Capital Stock to be issued in the Merger on the NYSE, (vi)
the  filing with the Securities  and Exchange Commission (the  "SEC") of a joint
proxy statement in definitive form relating to the

                                      A-9
<PAGE>
meetings of Parent's and Subject Company's stockholders to be held in connection
with this Agreement and the  transactions contemplated hereby (the "Joint  Proxy
Statement")  and the filing and declaration of effectiveness of the registration
statement on Form S-4  (the "S-4") in  which the Joint  Proxy Statement will  be
included as a prospectus, (vii) the filing of the Certificate of Merger with the
Delaware  Secretary pursuant to  the DGCL, (viii) such  filings and approvals as
are required to be made or obtained  under the securities or "Blue Sky" laws  of
various  states in connection with the issuance  of the shares of Parent Capital
Stock pursuant to this Agreement, (ix)  the adoption of the agreement of  merger
(within  the meaning of Section 251 of  the DGCL) contained in this Agreement by
the requisite vote of  the stockholders of Subject  Company and the approval  of
the  Parent  Vote Matters  (as  defined below)  by  the requisite  votes  of the
stockholders of Parent, (x) the consents and approvals set forth in Section  3.4
of  the Subject Company Disclosure Schedule, and (xi) the consents and approvals
of third parties  which are not  Governmental Entities (as  defined below),  the
failure of which to obtain will not have and would not be reasonably expected to
have  a Material  Adverse Effect,  no consents  or approvals  of, or  filings or
registrations with,  any court,  administrative agency  or commission  or  other
governmental authority or instrumentality (each a "Governmental Entity") or with
any  third party are necessary in connection with (A) the execution and delivery
by Subject Company of the Subject Company Documents and (B) the consummation  by
Subject Company of the Merger and the other transactions contemplated hereby and
thereby.

    3.5   REPORTS.   Subject  Company 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,  1993 with (i)  the Federal Reserve  Board, (ii) the  OCC,
(iii)  any state regulatory  authority (each a "State  Regulator"), (iv) the SEC
(Form BD), (v) the FDIC, (vi) any self-regulatory organization ("SRO") and (vii)
any foreign financial or self-regulatory organization (collectively  "Regulatory
Agencies")  and have paid all fees and assessments due and payable in connection
therewith. Except for normal  examinations conducted by  a Regulatory Agency  in
the regular course of the business of Subject Company and its Subsidiaries or as
set  forth  in  Section  3.5  of the  Subject  Company  Disclosure  Schedule, no
Regulatory Agency has  initiated any  proceeding or,  to the  best knowledge  of
Subject  Company,  investigation  into  the business  or  operations  of Subject
Company or any of its Subsidiaries since January 1, 1993. Except as set forth in
Section 3.5 of  the Subject Company  Disclosure Schedule, there  is no  material
unresolved  violation,  criticism or  exception  by any  Regulatory  Agency with
respect to  any report  or statement  relating to  any examinations  of  Subject
Company  or  any  of its  Subsidiaries.  The  deposits of  each  Subject Company
Subsidiary that is an insured institution are insured by the FDIC in  accordance
with the Federal Deposit Insurance Act up to applicable limits.

    3.6  FINANCIAL STATEMENTS.  Subject Company has previously made available to
Parent  copies of (a) the consolidated balance sheets of Subject Company and its
Subsidiaries, as of December  31, for the  fiscal years 1993  and 1994, and  the
related  consolidated statements  of operations,  shareholders' equity  and cash
flows for the fiscal years 1992 through 1994, inclusive, as reported in  Subject
Company's Annual Report on Form 10-K for the fiscal year ended December 31, 1994
filed  with the SEC under  the Securities Exchange Act  of 1934, as amended (the
"Exchange Act"), in each case accompanied by  the audit report of Ernst &  Young
LLP,  independent auditors  with respect to  Subject Company,  (b) the unaudited
consolidated balance sheet of  Subject Company and its  Subsidiaries as of  June
30,  1994 and June 30, 1995 and the related unaudited consolidated statements of
operations, shareholders' equity and  cash flows for the  periods then ended  as
reported in Subject Company's Quarterly Report on Form 10-Q for the period ended
June  30, 1995 filed with  the SEC under the Exchange  Act and (c) the unaudited
consolidated balance  sheet  of  Subject  Company and  its  Subsidiaries  as  of
September  30,  1995  and  the  related  unaudited  consolidated  statements  of
operations, shareholders' equity and cash flows  for the period then ended.  The
December  31, 1994 consolidated balance sheet  of Subject Company (including the
related notes,  where applicable)  fairly  presents the  consolidated  financial
position of Subject Company and its Subsidiaries as of the date thereof, and the
other  financial  statements  referred to  in  this Section  3.6  (including the
related notes, where  applicable) fairly present,  and the financial  statements
referred to in Section 6.13 hereof will fairly present

                                      A-10
<PAGE>
(subject,   in  the  case  of  the  unaudited  statements,  to  recurring  audit
adjustments normal  in  nature and  amount),  the results  of  the  consolidated
operations  and  changes  in  stockholders'  equity  and  consolidated financial
position of  Subject Company  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 6.13  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  6.13 will  be, prepared  in accordance  with
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, as permitted by Form
10-Q. The books and records of  Subject Company and its Subsidiaries have  been,
and  are being, maintained in all material  respects in accordance with GAAP and
any other applicable legal and  accounting requirements and reflect only  actual
transactions.

    3.7   BROKER'S  FEES.   Except as set  forth in  Section 3.7  of the Subject
Company Disclosure Schedule,  neither Subject  Company nor  any Subject  Company
Subsidiary  nor any of  their respective officers or  directors has employed any
broker or finder or incurred any liability for any broker's fees, commissions or
finder's fees in  connection with any  of the transactions  contemplated by  the
Subject Company Documents.

    3.8  ABSENCE OF CERTAIN CHANGES OR EVENTS.  (a) Except as publicly disclosed
in  Subject Company Reports (as defined in Section 3.12) filed prior to the date
hereof, since  June  30, 1995,  no  event (including,  without  limitation,  any
earthquake  or other act of God) has  occurred which has had or would reasonably
be expected to have, individually or in the aggregate, a Material Adverse Effect
on Subject Company or the Surviving Corporation.

    (b) Except as set forth in Section 3.8(b) of the Subject Company  Disclosure
Schedule, since June 30, 1995, Subject Company and its Subsidiaries have carried
on  their respective businesses in all  material respects in the ordinary course
of business, and  neither Subject Company  nor any of  its Subsidiaries has  (i)
except  for normal increases in the  ordinary course of business consistent with
past practice and  except as required  by applicable law,  increased the  wages,
salaries,  compensation, pension or other fringe benefits or perquisites payable
to any named executive officer (within the meaning of Regulation S-K of the SEC)
or director, other than persons newly  hired for such position, from the  amount
thereof  in effect as of June 30,  1995, or granted any severance or termination
pay, entered into  any contract to  make or grant  any severance or  termination
pay,  or paid  any bonus, in  each case to  any such named  executive officer or
director, other than pursuant to preexisting agreements or arrangements or  (ii)
suffered any strike, work stoppage, slow-down or other labor disturbance.

    3.9    LEGAL  PROCEEDINGS.   (a)  Neither  Subject Company  nor  any  of its
Subsidiaries is a  party to any,  and there are  no pending or,  to the best  of
Subject  Company's  knowledge,  threatened, legal,  administrative,  arbitral or
other proceedings, claims, actions or governmental or regulatory  investigations
of  any nature against Subject Company or any of its Subsidiaries or challenging
the validity  or  propriety of  the  transactions contemplated  by  the  Subject
Company  Documents as to which  there is a reasonable  probability of an adverse
determination and which, if adversely determined, would, individually or in  the
aggregate,  have or reasonably be expected to  have a Material Adverse Effect on
Subject Company.

    (b)  There  is  no  injunction,   order,  judgment,  decree  or   regulatory
restriction  imposed upon Subject Company, any of its Subsidiaries or the assets
of Subject Company or any of its Subsidiaries which has had, or would reasonably
be expected to have, a Material Adverse Effect on Subject Company.

    3.10   TAXES  AND  TAX  RETURNS.   (a)  Subject  Company  and  each  of  its
Subsidiaries  has timely filed or caused  to be filed all returns, declarations,
reports, estimates,  information returns  and statements  required to  be  filed
under federal, state, local or any foreign tax laws ("Tax Returns") with respect
to

                                      A-11
<PAGE>
Subject  Company or any  of its Subsidiaries,  except where the  failure to file
timely such Tax Returns would not have  and would not reasonably be expected  to
have  a Material Adverse Effect on Subject Company. All Taxes shown to be due on
such Tax Returns have been paid  or adequate reserves have been established  for
the payment of such Taxes, except where the failure to pay or establish adequate
reserves  would not have and would not reasonably be expected to have a Material
Adverse Effect on Subject Company. Except as set forth in Section 3.10(a) of the
Subject Company Disclosure  Schedule, no  material (i) audit  or examination  or
(ii)  refund litigation with respect to any  Tax Return is pending. All material
Tax Returns filed by Subject Company  and each of its Subsidiaries are  complete
and accurate in all material respects.

    (b)  Subject Company has no reason to believe that any conditions exist that
might prevent or impede  the Merger from qualifying  as a reorganization  within
the meaning of Section 368(a) of the Code.

    (c)  For purposes of this Agreement,  "Taxes" shall mean all taxes, charges,
fees, levies  or  other  assessments, including,  without  limitation,  all  net
income,  gross  income,  gross  receipts,  sales,  use,  AD  VALOREM,  goods and
services, capital, transfer, franchise, profits, license, withholding,  payroll,
employment,  employer health,  excise, estimated,  severance, stamp, occupation,
property or other  taxes, customs duties,  fees, assessments or  charges of  any
kind  whatsoever, together with any interest and any penalties, additions to tax
or additional amounts imposed by any taxing authority.

    3.11  EMPLOYEES.   (a)  Section 3.11(a)  of the  Subject Company  Disclosure
Schedule  sets forth a true and complete  list of each material employee benefit
plan, arrangement  or  agreement that  is  maintained as  of  the date  of  this
Agreement  (the "Plans") by Subject Company or any of its Subsidiaries or by any
trade or business, whether  or not incorporated (an  "ERISA Affiliate"), all  of
which  together with Subject Company would  be deemed a "single employer" within
the meaning of Section  4001 of the Employee  Retirement Income Security Act  of
1974, as amended ("ERISA").

    (b) As soon as practicable after the date hereof, Subject Company shall make
available  to  Parent true  and complete  copies of  each of  the Plans  and all
related documents, including  but not limited  to (i) the  actuarial report  for
such  Plan (if  applicable) for each  of the last  two years, and  (ii) the most
recent determination letter  from the Internal  Revenue Service (if  applicable)
for such Plan.

    (c) Except as set forth in Section 3.11(c) of the Subject Company Disclosure
Schedule,  (i)  each of  the Plans  has  been operated  and administered  in all
material respects in accordance with applicable laws, including but not  limited
to  ERISA and the Code, (ii) each of the Plans intended to be "qualified" within
the meaning of Section 401(a) of the Code is so qualified, (iii) with respect to
each Plan which is subject  to Title IV of ERISA,  the present value of  accrued
benefits  under such Plan, based upon the actuarial assumptions used for funding
purposes in the  most recent actuarial  report prepared by  such Plan's  actuary
with  respect to such Plan, did not, as of its latest valuation date, exceed the
then current  value  of  the assets  of  such  Plan allocable  to  such  accrued
benefits,  (iv) no Plan provides benefits, including without limitation death or
medical benefits (whether  or not insured),  with respect to  current or  former
employees  of Subject  Company, its Subsidiaries  or any  ERISA Affiliate beyond
their retirement  or  other termination  of  service, other  than  (w)  coverage
mandated  by applicable law, (x) death benefits or retirement benefits under any
"employee pension plan," as that term is  defined in Section 3(2) of ERISA,  (y)
deferred  compensation benefits accrued  as liabilities on  the books of Subject
Company, its Subsidiaries or the ERISA Affiliates or (z) benefits the full  cost
of which is borne by the current or former employee (or his beneficiary), (v) no
liability  under Title  IV of  ERISA has been  incurred by  Subject Company, its
Subsidiaries or any ERISA Affiliate that has not been satisfied in full, and  no
condition  exists  that  presents  a  material  risk  to  Subject  Company,  its
Subsidiaries  or  any  ERISA  Affiliate   of  incurring  a  material   liability
thereunder,  (vi) no Plan  is a "multi-employer  pension plan," as  such term is
defined in Section  3(37) of  ERISA, (vii)  all contributions  or other  amounts
payable  by Subject Company  or its Subsidiaries  as of the  Effective Time with
respect to each Plan in respect of current or prior plan years have been paid or
accrued in accordance with generally  accepted accounting practices and  Section
412   of   the   Code,   (viii)   since   January   1,   1994   neither  Subject

                                      A-12
<PAGE>
Company, its Subsidiaries nor any ERISA  Affiliate has engaged in a  transaction
in  connection  with  which  Subject  Company,  its  Subsidiaries  or  any ERISA
Affiliate could be subject to either a material civil penalty assessed  pursuant
to  Section 409 or 502(i) of ERISA or a material tax imposed pursuant to Section
4975 or 4976  of the Code,  and (ix) to  the best knowledge  of Subject  Company
there  are  no pending,  threatened or  anticipated  claims (other  than routine
claims for benefits) by, on behalf of or against any of the Plans or any  trusts
related  thereto  which would,  individually  or in  the  aggregate, have  or be
reasonably expected to have a Material Adverse Effect on Subject Company.

    3.12  SEC REPORTS.  Subject Company has previously made available to  Parent
an  accurate and complete copy of each final registration statement, prospectus,
report, schedule and definitive proxy statement filed since January 1, 1994  and
prior  to  the date  hereof  by Subject  Company with  the  SEC pursuant  to the
Securities Act of 1933, as amended  (the "Securities Act"), or the Exchange  Act
(the "Subject Company Reports"), and no such registration statement, prospectus,
report, schedule or proxy statement contained any untrue statement of a material
fact  or omitted  to state any  material fact  required to be  stated therein or
necessary in order to make the statements therein, in light of the circumstances
in which they were  made, not misleading. Subject  Company has timely filed  all
Subject Company Reports and other documents required to be filed by it under the
Securities  Act and  the Exchange  Act, and, as  of their  respective dates, all
Subject Company Reports  complied in  all material respects  with the  published
rules and regulations of the SEC with respect thereto.

    3.13   COMPLIANCE WITH APPLICABLE LAW.   Except as disclosed in Section 3.13
of the Subject  Company Disclosure  Schedule, Subject  Company and  each of  its
Subsidiaries   hold,  and  have  at  all  times  held,  all  material  licenses,
franchises, permits and authorizations necessary for the lawful conduct of their
respective businesses under and pursuant to all, and have complied with and  are
not  in  default in  any material  respect under  any, applicable  law, statute,
order, rule, regulation,  policy and/  or guideline of  any Governmental  Entity
relating to Subject Company or any of its Subsidiaries, except where the failure
to  hold such license, franchise, permit  or authorization or such noncompliance
or default would not,  individually or in the  aggregate, have or reasonably  be
expected  to  have a  Material Adverse  Effect on  Subject Company,  and neither
Subject Company nor any of its Subsidiaries knows of, or has received notice of,
any violations of  any of  the above which,  individually or  in the  aggregate,
would  have or would reasonably be expected to have a Material Adverse Effect on
Subject Company.

    3.14  CERTAIN CONTRACTS.  (a) Except as set forth in Section 3.14(a) of  the
Subject  Company Disclosure  Schedule, neither  Subject Company  nor any  of its
Subsidiaries is a party to or is bound by any contract, arrangement,  commitment
or  understanding (whether written or oral) (i) which is a material contract (as
defined in Item 601(b)(10) of Regulation S-K  of the SEC) to be performed  after
the  date of this Agreement that has not been filed or incorporated by reference
in the Subject Company Reports, (ii)  which materially restricts the conduct  of
any  line of business by Subject  Company, or (iii) with or  to a labor union or
guild (including any collective bargaining agreement). Subject Company has  made
available  to Parent true  and correct copies of  all employment, consulting and
deferred compensation  agreements  to  which  Subject  Company  or  any  of  its
Subsidiaries is a party. Each contract, arrangement, commitment or understanding
of  the type described in  this Section 3.14(a), other  than the Subject Company
Documents, whether or not  set forth in Section  3.14(a) of the Subject  Company
Disclosure  Schedule, is referred to herein as a "Subject Company Contract," and
neither Subject Company nor  any of its Subsidiaries  knows of, or has  received
notice of, any violation of the above by any of the other parties thereto which,
individually  or in the aggregate, would have or would reasonably be expected to
have a Material Adverse Effect on Subject Company.

    (b) (i) Each Subject Company Contract is valid and binding and in full force
and effect,  (ii)  Subject Company  and  each of  its  Subsidiaries has  in  all
material  respects performed all  obligations required to be  performed by it to
date under each Subject Company Contract, and (iii) no event or condition exists
which constitutes or, after notice or lapse of time or both, would constitute  a
material default on the part of Subject Company or any of its Subsidiaries under
any such Subject Company

                                      A-13
<PAGE>
Contract,  except, in each  case, where such invalidity,  failure to be binding,
failure to so perform  or default, individually or  in the aggregate, would  not
have  or reasonably  be expected  to have a  Material Adverse  Effect on Subject
Company.

    3.15  AGREEMENTS WITH REGULATORY AGENCIES.   Except as set forth in  Section
3.15 of the Subject Company Disclosure Schedule, neither Subject Company nor any
of its Subsidiaries is subject to any cease-and-desist or other order issued by,
or  is a  party to  any written  agreement, consent  agreement or  memorandum of
understanding  with,  or  is  a  party  to  any  commitment  letter  or  similar
undertaking  to, or is subject to any order  or directive by, or has adopted any
board resolutions at the request of (each,  whether or not set forth in  Section
3.15  of the Subject Company Disclosure Schedule, a "Regulatory Agreement"), any
Regulatory Agency or other Governmental Entity that restricts the conduct of its
business or  that in  any manner  relates to  its capital  adequacy, its  credit
policies,  its management or its business, nor has Subject Company or any of its
Subsidiaries been advised by any Regulatory Agency or other Governmental  Entity
that it is considering issuing or requesting any Regulatory Agreement.

    3.16   UNDISCLOSED LIABILITIES.  Except for those liabilities that are fully
reflected or  reserved against  on  the consolidated  balance sheet  of  Subject
Company included in the Subject Company Form 10-Q for the quarter ended June 30,
1995, and for liabilities incurred in the ordinary course of business consistent
with  past practice, since June 30, 1995, neither Subject Company nor any of its
Subsidiaries has  incurred  any  liability of  any  nature  whatsoever  (whether
absolute,  accrued, contingent  or otherwise and  whether due or  to become due)
that, either alone or  when combined with all  similar liabilities, has had,  or
would  reasonably  be expected  to have,  a Material  Adverse Effect  on Subject
Company.

    3.17  STATE TAKEOVER LAWS.   The Board of  Directors of Subject Company  has
approved  the execution of  the Subject Company  Option Agreement and authorized
and approved  the Merger  (prior to  the execution  by Subject  Company of  this
Agreement and prior to the execution of the Subject Company Option Agreement) in
accordance with Section 203 of the DGCL, such that Section 203 will not apply to
this  Agreement, the Subject  Company Option Agreement,  the Subject Company Fee
Letter or  the  transactions  contemplated  hereby and  thereby.  The  Board  of
Directors  of Subject Company has taken all  such action required to be taken by
it to provide  that this Agreement,  the Subject Company  Option Agreement,  the
Subject  Company Fee Letter and the transactions contemplated hereby and thereby
shall be  exempt from  the requirements  of any  "moratorium," "control  share,"
"fair price" or other anti-takeover laws or regulations of any state.

    3.18  RIGHTS AGREEMENT.  Subject Company has taken all action (including, if
required,  redeeming all of the outstanding  common stock purchase rights issued
pursuant to the Subject Company Rights Agreement or amending or terminating  the
Subject  Company  Rights Agreement)  so that  the entering  into of  the Subject
Company Documents and the consummation  of the transactions contemplated  hereby
and  thereby do not and will not result in the grant of any rights to any person
under the Subject  Company Rights  Agreement or  enable or  require the  Subject
Company Rights to be exercised, distributed or triggered.

    3.19   POOLING  OF INTERESTS.   As  of the  date of  this Agreement, Subject
Company has no reason to believe that  the Merger will not qualify as a  pooling
of interests for accounting purposes.

    3.20   FIRST INTERSTATE  NAME.  Except as  set forth in  Section 3.20 of the
Subject Company Disclosure Schedule,  Subject Company has the  right to use  the
First  Interstate name in each state of the United States, free and clear of any
Liens, and no other person has the right to use such name in any such state.

    3.21   SUBJECT COMPANY  INFORMATION.   The information  relating to  Subject
Company  and its Subsidiaries to be provided  by Subject Company to be contained
in the Joint Proxy Statement  and the S-4, or in  any other document filed  with
any  other regulatory agency in connection herewith, will not contain any untrue
statement of a material fact or omit to state a material fact necessary to  make
the

                                      A-14
<PAGE>
statements  therein, in light of  the circumstances in which  they are made, not
misleading. The Joint  Proxy Statement  (except for such  portions thereof  that
relate  only to Parent or  any of its Subsidiaries)  will comply in all material
respects with the provisions of the  Exchange Act and the rules and  regulations
thereunder.

    3.22.   ENVIRONMENTAL LIABILITY.  Except as set forth in Section 3.22 of the
Subject  Company  Disclosure  Schedule,  there  are  no  legal,  administrative,
arbitral  or  other  proceedings,  claims, actions,  causes  of  action, private
environmental  investigations   or   remediation  activities   or   governmental
investigations  of any  nature seeking  to impose,  or that  reasonably could be
expected to  result  in  the  imposition,  on Subject  Company  or  any  of  its
Subsidiaries  of any liability or obligation  arising under common law standards
relating to  environmental protection,  human  health or  safety, or  under  any
local,   state  or  federal  environmental  statute,  regulation  or  ordinance,
including,  without  limitation,   the  Comprehensive  Environmental   Response,
Compensation   and  Liability  Act  of   1980,  as  amended  (collectively,  the
"Environmental  Laws"),  pending  or,  to  the  knowledge  of  Subject  Company,
threatened,  against Subject Company or any of its Subsidiaries, which liability
or obligation would  have or  would reasonably be  expected to  have a  Material
Adverse Effect on Subject Company. To the knowledge of Subject Company or any of
its  Subsidiaries, there is no reasonable  basis for any such proceeding, claim,
action  or  governmental  investigation  that  would  impose  any  liability  or
obligation  that would have or  would reasonably be expected  to have a Material
Adverse Effect on Subject Company. To  the knowledge of Subject Company,  during
or  prior to  the period  of (i) its  or any  of its  Subsidiaries' ownership or
operation of any of their respective current properties, (ii) its or any of  its
Subsidiaries'  participation in the management of  any property, or (iii) its or
any of its Subsidiaries' holding of a security interest or other interest in any
property, there were  no releases  or threatened releases  of hazardous,  toxic,
radioactive   or  dangerous   materials  or  other   materials  regulated  under
Environmental Laws in, on, under or affecting any such property. Neither Subject
Company nor  any  of  its  Subsidiaries is  subject  to  any  agreement,  order,
judgment,  decree,  letter  or memorandum  by  or with  any  court, governmental
authority, regulatory agency or third  party imposing any material liability  or
obligation  pursuant to or under any Environmental  Law that would have or would
reasonably be expected to have a Material Adverse Effect on Subject Company.

    3.23.  INTEREST RATE RISK MANAGEMENT INSTRUMENTS.  All interest rate  swaps,
caps,  floors  and option  agreements and  other  interest rate  risk management
arrangements, whether entered into for the account of Subject Company or for the
account of  a customer  of Subject  Company  or one  of its  Subsidiaries,  were
entered  into in accordance with prudent banking practices and applicable rules,
regulations and policies  of any  regulatory authority  and with  counterparties
believed  to be  financially responsible  at the time  and are  legal, valid and
binding obligations of Subject Company or one of its Subsidiaries 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. Subject Company and each
of its Subsidiaries have  duly performed in all  material respects all of  their
material  obligations thereunder to the extent  that such obligations to perform
have accrued;  and,  to Subject  Company's  knowledge, 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 Subject Company.

                                  ARTICLE IV.
                    REPRESENTATIONS AND WARRANTIES OF PARENT

    Parent hereby represents and warrants to Subject Company as follows:

    4.1.   CORPORATE ORGANIZATION.  (a)  Parent is a corporation duly organized,
validly existing and in good standing under  the laws of the State of  Delaware.
Parent  has  the  corporate power  and  authority to  own  or lease  all  of its
properties and assets and to carry on its business as it is now being conducted,
and is duly licensed or qualified to  do business in each jurisdiction in  which
the nature of the business

                                      A-15
<PAGE>
conducted  by it or the character or location of the properties and assets owned
or leased by it  makes such licensing or  qualification necessary, except  where
the  failure to  be so  licensed or  qualified would  not have  or reasonably be
expected to have a Material Adverse Effect on Parent. Parent is duly  registered
as  a bank holding company  under the BHC Act. The  copies of the Certificate of
Incorporation and Bylaws of Parent, which have previously been made available to
Subject Company, are true, complete and  correct copies of such documents as  in
effect as of the date of this Agreement.

    (b)  Each Parent Subsidiary is (i) duly  organized and validly existing as a
bank,  corporation  or  partnership  under  the  laws  of  its  jurisdiction  of
organization,  (ii) is duly qualified to do business and in good standing in all
jurisdictions (whether federal, state, local or foreign) where its ownership  or
leasing  of  property  or the  conduct  of its  business  requires it  to  be so
qualified and in which the failure to  be so qualified would have or  reasonably
be  expected to  have a  Material Adverse  Effect on  Parent, and  (iii) has all
requisite corporate  power and  authority to  own or  lease its  properties  and
assets and to carry on its business as now conducted.

    (c) Merger Sub is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware.

    4.2.   CAPITALIZATION.  (a) The  authorized capital stock of Parent consists
of 200,000,000 shares of Parent Common Stock and 10,000,000 shares of  Preferred
Stock,  par value $1.00  per share ("Parent  Preferred Stock"). At  the close of
business on October  31, 1995, there  were 129,798,913 shares  of Parent  Common
Stock  outstanding, 3,702,750  shares of  Parent Preferred  Stock designated and
2,077,800 shares issued  and outstanding as  Series 1991A Convertible  Preferred
Stock ("Parent Series 1991A Preferred Stock"), 12,750 shares of Parent Preferred
Stock  designated  and  no  shares  outstanding  as  Adjustable  Rate Cumulative
Preferred Stock Series 1990A ("Parent Series 1990A Preferred Stock"),  1,400,000
shares of Parent Preferred Stock designated and no shares issued and outstanding
as  Parent Series A Junior Participating  Preferred Stock pursuant to the Rights
Agreement, dated as of December 21, 1988, between Parent and Morgan  Shareholder
Services  Trust  Company,  as  Rights  Agent,  as  amended  (the  "Parent Rights
Agreement"), and  5,833,411  shares of  Parent  Common Stock  held  in  Parent's
treasury.  On  October 31,  1995, no  shares  of Parent  Common Stock  or Parent
Preferred Stock were reserved for issuance, except that (i) 22,718,744 shares of
Parent Common Stock were reserved for issuance pursuant to outstanding  options,
warrants,  periodic stock  purchase rights  ("PSPRs"), risk  event warrants, the
Parent dividend reinvestment plan, the  Parent employee stock purchase plan  and
employee  benefit  plans,  (ii) 3,585,452  shares  of Parent  Common  Stock were
reserved for  issuance upon  conversion  of the  Parent Series  1991A  Preferred
Stock, (iii) 16,950,057 shares of Parent Common Stock were reserved for issuance
upon  consummation of the acquisition by Parent of FirsTier Financial, Inc. (the
"FirsTier Acquisition"), (iv)  12,750 shares  of Parent  Series 1990A  Preferred
Stock  were reserved for issuance upon exercise of PSPRs or risk event warrants,
and (v) 1,400,000 shares of Parent Series A Junior Participating Preferred Stock
were reserved for  issuance upon exercise  of the Parent  Rights distributed  to
holders  of Parent Common Stock pursuant to  the Parent Rights Agreement. All of
the issued  and  outstanding  shares  of the  Parent  Common  Stock  and  Parent
Preferred Stock have been duly authorized and validly issued and are fully paid,
nonassessable  and  free  of  preemptive  rights,  with  no  personal  liability
attaching to the ownership thereof. As of the date of this Agreement, except (i)
as set forth in  Schedule 4.2(a) of the  Parent Disclosure Schedule (as  defined
below),  (ii) for the Parent Rights Agreement (a true and correct copy of which,
including all amendments thereto, has  been made available to Subject  Company),
(iii)  for the Parent Option  Agreement and (iv) as  set forth elsewhere in this
Section 4.2(a),  Parent  does not  have  and is  not  bound by  any  outstanding
subscriptions,  options,  warrants,  calls,  commitments  or  agreements  of any
character calling for the  purchase or issuance of  any shares of Parent  Common
Stock  or Parent Preferred Stock or any other equity securities of Parent or any
securities representing the right to purchase or otherwise receive any shares of
Parent Common  Stock or  Parent Preferred  Stock.  Except (i)  as set  forth  in
Section 4.2(a) of the disclosure schedule of Parent delivered to Subject Company
concurrently  herewith (the "Parent  Disclosure Schedule") and  (ii) for options
permitted by  this  Agreement to  be  granted subsequent  to  the date  of  this
Agreement, since

                                      A-16
<PAGE>
October  31, 1995, Parent has not issued any  shares of its capital stock or any
securities convertible into or exercisable for any shares of its capital  stock,
other  than pursuant to Parent's dividend reinvestment and stock purchase plans,
the exercise  of  employee stock  options  granted prior  to  such date  and  as
disclosed  in Section 4.2(a) of the  Parent Disclosure Schedule, warrants, PSPRs
and risk event  warrants granted  prior to such  date and  disclosed in  Section
4.2(a)  of the  Parent Disclosure Schedule,  the conversion of  shares of Parent
Series 1991A  Preferred Stock,  the  Parent Rights  Agreement and  the  FirsTier
Acquisition.  The shares of  Parent Capital Stock  to be issued  pursuant to the
Merger will be duly  authorized and validly issued  and, at the Effective  Time,
all such shares will be fully paid, nonassessable and free of preemptive rights,
with no personal liability attaching to the ownership thereof.

    (b) Except as set forth in Section 4.2(b) of the Parent Disclosure Schedule,
Parent  owns,  directly  or indirectly,  (i)  at  least 99%  of  the  issued and
outstanding shares of capital stock of each of the material Parent  Subsidiaries
(other  than Merger Sub)  and (ii) all  of the issued  and outstanding shares of
capital stock of Merger Sub, in each case, free and clear of any Liens, and  all
of  such  shares are  duly authorized  and  validly issued  and are  fully paid,
nonassessable  and  free  of  preemptive  rights,  with  no  personal  liability
attaching  to the ownership thereof. No Parent Subsidiary has or is bound by any
outstanding subscriptions, options, warrants,  calls, commitments or  agreements
of  any character calling for the purchase  or issuance of any shares of capital
stock or  any  other  equity  security of  such  Subsidiary  or  any  securities
representing  the right to  purchase or otherwise receive  any shares of capital
stock or any other equity security of such Subsidiary.

    4.3.  AUTHORITY;  NO VIOLATION.   (a) Parent  has full  corporate power  and
authority  to execute and deliver  this Agreement, the Fee  Letter, of even date
herewith, between  Parent and  Subject  Company (the  "Parent Fee  Letter,"  and
together  with the  Subject Company Fee  Letter, the "Fee  Letters") pursuant to
which Parent  will  in certain  circumstances  pay certain  amounts  to  Subject
Company,  the Parent Option Agreement and the other documents contemplated to be
executed  and  delivered   by  Parent  in   connection  with  the   transactions
contemplated  hereby (this Agreement,  together with the  Parent Fee Letter, the
Subject Company Option  Agreement and  such other  documents, collectively,  the
"Parent  Documents") and to consummate  the transactions contemplated hereby and
thereby. The execution  and delivery  of each of  the Parent  Documents and  the
consummation  of the transactions contemplated hereby and thereby have been duly
and validly approved by the Board of Directors of Parent. The Board of Directors
of Parent has directed that the issuance of Parent Common Stock pursuant  hereto
and   an  amendment  (the  "Charter   Amendment")  to  Parent's  Certificate  of
Incorporation to (i) increase the number  of authorized shares of Parent  Common
Stock  to 500,000,000 and to increase the  number of authorized shares of Parent
Preferred Stock to 15,000,000  and (ii) to  change the name  of Parent to  First
Interstate  Bancorp (collectively,  the "Parent  Vote Matters")  be submitted to
Parent's stockholders for approval at a meeting of such stockholders and, except
for the approval of the Charter Amendment by the affirmative vote of the holders
of a majority of the outstanding shares of Parent Common Stock and the  approval
of  the issuance of shares of Parent  Common Stock pursuant hereto by a majority
of the  shares of  Parent Common  Stock voting  at the  meeting of  shareholders
called  for  such purpose  at which  a  quorum was  present, no  other corporate
proceedings on the part of Parent are necessary to approve the Parent  Documents
and  to consummate the transactions contemplated hereby and thereby. Each of the
Parent Documents has been duly and validly executed and delivered by Parent  and
(assuming  due authorization,  execution and  delivery by  Subject Company) this
Agreement constitutes  a valid  and binding  obligation of  Parent,  enforceable
against  Parent  in accordance  with  its 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.

    (b) Merger Sub has full corporate power and authority to execute and deliver
this Agreement  and  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  approved by  the
Board of Directors of Merger Sub and by Parent as the sole stockholder of Merger

                                      A-17
<PAGE>
Sub,  and no other corporate proceedings on the part of Merger Sub are necessary
to consummate the transactions contemplated hereby. This Agreement has been duly
and  validly  executed   and  delivered   by  Merger  Sub   and  (assuming   due
authorization,  execution and delivery  by Subject Company)  constitutes a valid
and binding  obligation  of  Merger  Sub,  enforceable  against  Merger  Sub  in
accordance  with  its 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.

    (c) Except as set forth in Section 4.3(c) of the Parent Disclosure Schedule,
neither the execution and delivery of  the Parent Documents by Parent or  Merger
Sub,  nor  the  consummation  by  Parent  or  Merger  Sub  of  the  transactions
contemplated hereby and thereby, nor compliance by Parent or Merger Sub with any
of the terms or provisions hereof or thereof, will (i) violate any provision  of
the  Certificate of  Incorporation or  Bylaws of  Parent or  any of  the similar
governing documents  of  any of  its  Subsidiaries  or (ii)  assuming  that  the
consents and approvals referred to in Section 4.4 are duly obtained, (x) violate
any statute, code, ordinance, rule, regulation, judgment, order, writ, decree or
injunction  applicable to  Parent or  any of  its Subsidiaries  or any  of their
respective properties or  assets, or  (y) violate,  conflict with,  result in  a
breach  of  any provision  of or  the loss  of any  benefit under,  constitute a
default (or  an  event which,  with  notice or  lapse  of time  or  both,  would
constitute  a  default)  under, result  in  the  termination of  or  a  right of
termination or cancellation  under, accelerate the  performance required by,  or
result  in the  creation of any  Lien upon  any of the  respective properties or
assets of Parent or any of its Subsidiaries under, any of the terms,  conditions
or  provisions of any  note, bond, mortgage, indenture,  deed of trust, license,
lease, agreement or other instrument or obligation to which Parent or any of its
Subsidiaries is a party, or by which they or any of their respective  properties
or  assets may be bound  or affected, except (in the  case of clause (ii) above)
for such violations, conflicts, breaches  or defaults which either  individually
or in the aggregate will not have and would not reasonably be expected to have a
Material Adverse Effect on Parent.

    4.4.  CONSENTS AND APPROVALS.  Except for (i) the filing of applications and
notices,  as applicable, with  the Federal Reserve  Board under the  BHC Act and
approval of such  applications and  notices, (ii)  the filing  of any  requisite
applications  with  the OCC  and the  approval of  such applications,  (iii) the
filings with respect  to the State  Approvals (including receipt  of such  State
Approvals),  (iv) the  filing of any  requisite applications with  the Office of
Thrift Supervision and the  approval of such applications,  (v) approval of  the
listing of the Parent Capital Stock to be issued in the Merger on the NYSE, (vi)
the  filing  with  the SEC  of  the Joint  Proxy  Statement and  the  filing and
declaration of effectiveness of the S-4, (vii) the filing of the Certificate  of
Merger with the Delaware Secretary pursuant to the DGCL, (viii) such filings and
approvals  as are required to be made  or obtained under the securities or "Blue
Sky" laws of various  states in connection  with the issuance  of the shares  of
Parent  Capital  Stock pursuant  to  this Agreement,  (ix)  the adoption  of the
agreement of merger (within the meaning of Section 251 of the DGCL) contained in
this Agreement by the requisite vote of the stockholders of Subject Company  and
the  approval  of  the  Parent  Vote  Matters  by  the  requisite  votes  of the
stockholders of Parent, (x) the filing of the appropriate documents necessary to
cause the Charter Amendment to become  effective with the Secretary of State  of
the  State of Delaware, (xi) the consents and approvals set forth in Section 4.4
of the Parent Disclosure Schedule, and (xii) the consents and approvals of third
parties which are not Governmental Entities, the failure of which to obtain will
not have and would not be reasonably expected to have a Material Adverse Effect,
no consents or approvals of, or filings or registrations with, any  Governmental
Entity or any third party are necessary in connection with (A) the execution and
delivery  by  Parent  and  Merger  Sub  of  the  Parent  Documents  and  (B) the
consummation by Parent and Merger Sub  of the Merger and the other  transactions
contemplated hereby and thereby.

    4.5.   REPORTS.  Parent  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,  1993  with the  Regulatory  Agencies, and  have  paid all  fees  and
assessments   due  and  payable  in  connection  therewith.  Except  for  normal
examinations conducted

                                      A-18
<PAGE>
by a Regulatory Agency in the regular  course of the business of Parent and  its
Subsidiaries,  no Regulatory Agency has initiated any proceeding or, to the best
knowledge of Parent, investigation into the business or operations of Parent  or
any  of its Subsidiaries since January 1,  1993. There is no material unresolved
violation, criticism, or exception by any Regulatory Agency with respect to  any
report  or  statement relating  to  any examinations  of  Parent or  any  of its
Subsidiaries. The  deposits  of  each  Parent  Subsidiary  that  is  an  insured
institution  are  insured by  the FDIC  in accordance  with the  Federal Deposit
Insurance Act up to applicable limits.

    4.6.  FINANCIAL STATEMENTS.  Parent has previously made available to Subject
Company copies  of  (a)  the  consolidated balance  sheets  of  Parent  and  its
Subsidiaries,  as of December  31, for the  fiscal years 1993  and 1994, and the
related consolidated statements of income,  shareholders' equity and cash  flows
for  the  fiscal years  1992 through  1994, inclusive,  as reported  in Parent's
Restated Annual Report as filed on Form  8-K for the fiscal year ended  December
31,  1994 filed with the SEC under the Exchange Act, in each case accompanied by
the audit  report of  Ernst &  Young LLP,  independent public  accountants  with
respect  to Parent, (b)  the unaudited consolidated balance  sheet of Parent and
its Subsidiaries as of June 30, 1994 and June 30, 1995 and the related unaudited
consolidated statements of income, cash  flows and shareholders' equity for  the
six  month periods then ended  as reported in Parent's  Quarterly Report on Form
10-Q for the period ended  June 30, 1995 filed with  the SEC under the  Exchange
Act  and  (c)  the  unaudited  consolidated  balance  sheet  of  Parent  and its
Subsidiaries as of  September 30,  1995 and the  related unaudited  consolidated
statements  of income, shareholders'  equity and cash flows  for the period then
ended. The December 31, 1994 consolidated balance sheet of Parent (including the
related notes,  where applicable)  fairly  presents the  consolidated  financial
position  of Parent and its  Subsidiaries as of the  date thereof, and the other
financial statements  referred to  in this  Section 4.6  (including the  related
notes,  where applicable) fairly present,  and the financial statements referred
to in Section  6.13 hereof  will fairly  present (subject,  in the  case of  the
unaudited  statements,  to  recurring  audit adjustments  normal  in  nature and
amount), the results  of the  consolidated income and  changes in  stockholders'
equity  and consolidated financial  position of Parent  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 6.13 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 6.13 will be, prepared
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 unaudited statements, as permitted by  Form 10-Q. The books and records
of Parent  and its  Subsidiaries have  been, and  are being,  maintained in  all
material  respects in  accordance with GAAP  and any other  applicable legal and
accounting requirements and reflect only actual transactions.

    4.7.  BROKER'S  FEES.   Except as  set forth in  Section 4.7  of the  Parent
Disclosure  Schedule, neither Parent nor any  Parent Subsidiary nor any of their
respective officers or directors has employed  any broker or finder or  incurred
any  liability for any broker's fees, commissions or finder's fees in connection
with any of the transactions contemplated by the Parent Documents.

    4.8.   ABSENCE  OF  CERTAIN CHANGES  OR  EVENTS.   (a)  Except  as  publicly
disclosed  in Parent Reports (as defined below)  filed prior to the date hereof,
since June 30, 1995, no event (including, without limitation, any earthquake  or
other  act of God) has occurred which has had or would reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on Parent.

    (b) Except as set forth in Section 4.8(b) of the Parent Disclosure Schedule,
since June  30,  1995,  Parent  and  its  Subsidiaries  have  carried  on  their
respective  businesses  in  all  material respects  in  the  ordinary  course of
business, and neither  Parent nor  any of its  Subsidiaries has  (i) except  for
normal  increases  in  the  ordinary course  of  business  consistent  with past
practice and  except  as  required  by  applicable  law,  increased  the  wages,
salaries,  compensation, pension or other fringe benefits or perquisites payable
to any named executive officer (within the meaning of Regulation S-K of the SEC)
or

                                      A-19
<PAGE>
director, other than  persons newly hired  for such positions,  from the  amount
thereof  in effect as of June 30,  1995, or granted any severance or termination
pay, entered into  any contract to  make or grant  any severance or  termination
pay,  or paid  any bonus, in  each case to  any such named  executive officer or
director, other than pursuant to preexisting agreements or arrangements or  (ii)
suffered any strike, work stoppage, slow-down or other labor disturbance.

    4.9.   LEGAL PROCEEDINGS.  (a) Neither Parent nor any of its Subsidiaries is
a party to any, and there are no pending or, to the best of Parent's  knowledge,
threatened,  legal,  administrative,  arbitral  or  other  proceedings,  claims,
actions or  governmental  or regulatory  investigations  of any  nature  against
Parent  or any of its  Subsidiaries or challenging the  validity or propriety of
the transactions contemplated  by the Parent  Documents as to  which there is  a
reasonable  probability  of an  adverse  determination and  which,  if adversely
determined, would,  individually or  in  the aggregate,  have or  reasonably  be
expected to have a Material Adverse Effect on Parent.

    (b)   There  is  no  injunction,  order,  judgment,  decree,  or  regulatory
restriction imposed upon Parent, any of its Subsidiaries or the assets of Parent
or any of its  Subsidiaries which has  had, or would  reasonably be expected  to
have, a Material Adverse Effect on Parent or the Surviving Corporation.

    4.10.   TAXES AND TAX RETURNS.  (a)  Parent and each of its Subsidiaries has
timely filed or caused to be filed all Tax Returns with respect to Parent or any
of its Subsidiaries, except  where the failure to  file timely such Tax  Returns
would  not have and would not reasonably  be expected to have a Material Adverse
Effect on Parent. All Taxes shown to be  due on such Tax Returns have been  paid
or adequate reserves have been established for the payment of such Taxes, except
where the failure to pay or establish adequate reserves would not have and would
not  reasonably be expected to have a  Material Adverse Effect on Parent. Except
as set forth in Section 4.10(a)  of the Parent Disclosure Schedule, no  material
(i)  audit or  examination or  (ii) refund  litigation with  respect to  any Tax
Return is pending.  All material Tax  Returns filed  by Parent and  each of  its
Subsidiaries are complete and accurate in all material respects.

    (b)  Parent has no  reason to believe  that any conditions  exist that might
prevent or impede  the Merger  from qualifying  as a  reorganization within  the
meaning of Section 368(a) of the Code.

    4.11.   EMPLOYEES.   (a) Section  4.11(a) of the  Parent Disclosure Schedule
sets forth a  true and  complete list of  each material  employee benefit  plan,
arrangement  or agreement that  is maintained as  of the date  of this Agreement
(the "Parent Plans") by  Parent or any  of its Subsidiaries or  by any trade  or
business, whether or not incorporated (a "Parent ERISA Affiliate"), all of which
together  with Parent would be deemed a  "single employer" within the meaning of
Section 4001 of ERISA.

    (b) As  soon  as  practicable  after the  date  hereof,  Parent  shall  make
available  to Subject  Company true  and complete copies  of each  of the Parent
Plans and all related documents, including but not limited to (i) the  actuarial
report  for such Parent Plan (if applicable) for each of the last two years, and
(ii) the most recent determination letter from the Internal Revenue Service  (if
applicable) for such Parent Plan.

    (c)  Except  as  set  forth  in Section  4.11(c)  of  the  Parent Disclosure
Schedule, (i) each of the Parent Plans has been operated and administered in all
material respects in accordance with applicable laws, including but not  limited
to  ERISA and the Code, (ii) each of the Parent Plans intended to be "qualified"
within the meaning of  Section 401(a) of  the Code is  so qualified, (iii)  with
respect  to each Parent Plan which is subject  to Title IV of ERISA, the present
value of  accrued benefits  under such  Parent Plan,  based upon  the  actuarial
assumptions  used  for  funding purposes  in  the most  recent  actuarial report
prepared by such  Parent Plan's actuary  with respect to  such Parent Plan,  did
not,  as of  its latest  valuation date,  exceed the  then current  value of the
assets of such Parent  Plan allocable to such  accrued benefits, (iv) no  Parent
Plan  provides benefits, including without  limitation death or medical benefits
(whether or not insured), with respect to current or former employees of Parent,
its Subsidiaries or any Parent ERISA Affiliate beyond their retirement or  other
termination  of service, other than (w) coverage mandated by applicable law, (x)
death benefits or retirement benefits under

                                      A-20
<PAGE>
any "employee pension plan," as that term  is defined in Section 3(2) of  ERISA,
(y)  deferred  compensation  benefits accrued  as  liabilities on  the  books of
Parent, its Subsidiaries or the Parent ERISA Affiliates or (z) benefits the full
cost of which is borne by the  current or former employee (or his  beneficiary),
(v)  no  liability under  Title IV  of ERISA  has been  incurred by  Parent, its
Subsidiaries or any Parent ERISA Affiliate that has not been satisfied in  full,
and   no  condition  exists  that  presents  a  material  risk  to  Parent,  its
Subsidiaries or any  Parent ERISA  Affiliate of incurring  a material  liability
thereunder, (vi) no Parent Plan is a "multi employer pension plan," as such term
is  defined in Section 3(37) of ERISA,  (vii) all contributions or other amounts
payable by Parent or its Subsidiaries as  of the Effective Time with respect  to
each  Parent Plan in  respect of current or  prior plan years  have been paid or
accrued in accordance with generally  accepted accounting practices and  Section
412  of the Code, (viii) since January  1, 1994 neither Parent, its Subsidiaries
nor any Parent ERISA Affiliate has  engaged in a transaction in connection  with
which Parent, its Subsidiaries or any Parent ERISA Affiliate could be subject to
either  a material civil penalty  assessed pursuant to Section  409 or 502(i) of
ERISA or a material tax  imposed pursuant to Section 4975  or 4976 of the  Code,
and  (ix) to the  best knowledge of  Parent there are  no pending, threatened or
anticipated claims (other than routine claims for benefits) by, on behalf of  or
against  any of  the Parent  Plans or  any trusts  related thereto  which would,
individually or  in the  aggregate, have  or be  reasonably expected  to have  a
Material Adverse Effect on Parent.

    4.12.  SEC REPORTS.  Parent has previously made available to Subject Company
an  accurate and complete copy of each final registration statement, prospectus,
report, schedule and definitive proxy statement filed since January 1, 1994  and
prior  to the date hereof by Parent with  the SEC pursuant to the Securities Act
or the Exchange Act (the "Parent Reports"), and no such registration  statement,
prospectus,  report, schedule or proxy  statement contained any untrue statement
of a material fact or omitted to  state any material fact required to be  stated
therein  or necessary in order  to make the statements  therein, in light of the
circumstances in which they were made,  not misleading. Parent has timely  filed
all  Parent Reports  and other documents  required to  be filed by  it under the
Securities Act and  the Exchange  Act, and, as  of their  respective dates,  all
Parent  Reports complied in  all material respects with  the published rules and
regulations of the SEC with respect thereto.

    4.13.  COMPLIANCE WITH APPLICABLE LAW.  Except as disclosed in Section  4.13
of the Parent Disclosure Schedule, Parent and each of its Subsidiaries hold, and
have  at  all  times  held,  all  material  licenses,  franchises,  permits  and
authorizations necessary for the lawful  conduct of their respective  businesses
under  and pursuant to all, and have complied with and are not in default in any
material respect under  any, applicable law,  statute, order, rule,  regulation,
policy  and/or guideline of any Governmental Entity relating to Parent or any of
its Subsidiaries,  except where  the failure  to hold  such license,  franchise,
permit or authorization or such noncompliance or default would not, individually
or  in the aggregate, have or reasonably  be expected to have a Material Adverse
Effect on Parent, and neither  Parent nor any of  its Subsidiaries knows of,  or
has  received notice  of, any  material violations  of any  of the  above which,
individually or in the aggregate, would have or reasonably be expected to have a
Material Adverse Effect on Parent.

    4.14.  CERTAIN CONTRACTS.  (a) Except as set forth in Section 4.14(a) of the
Parent Disclosure Schedule,  neither Parent  nor any  of its  Subsidiaries is  a
party  to or is bound by  any contract, arrangement, commitment or understanding
(whether written or oral) (i) which is  a material contract (as defined in  Item
601(b)(10)  of Regulation S-K of the SEC) to be performed after the date of this
Agreement that has  not been filed  or incorporated by  reference in the  Parent
Reports,  (ii) which materially restricts the conduct of any line of business by
Parent, or (iii) with  or to a  labor union or  guild (including any  collective
bargaining  agreement). Parent  has made available  to Subject  Company true and
correct  copies  of  all   employment,  consulting  and  deferred   compensation
agreements to which Parent or any of its Subsidiaries is a party. Each contract,
arrangement,  commitment or understanding of the  type described in this Section
4.14(a),   other   than   the   Parent    Documents,   whether   or   not    set

                                      A-21
<PAGE>
forth  in  Section 4.14(a)  of the  Parent Disclosure  Schedule, is  referred to
herein as a "Parent  Contract," and neither Parent  nor any of its  Subsidiaries
knows  of, or has received notice  of, any violation of the  above by any of the
other parties thereto  which, individually or  in the aggregate,  would have  or
would reasonably be expected to have a Material Adverse Effect on Parent.

    (b)  (i) Each  Parent Contract is  valid and  binding and in  full force and
effect, (ii) Parent and  each of its Subsidiaries  has in all material  respects
performed  all obligations  required to  be performed by  it to  date under each
Parent Contract, and (iii)  no event or condition  exists which constitutes  or,
after  notice or lapse of time or  both, would constitute, a material default on
the part of Parent or  any of its Subsidiaries  under any such Parent  Contract,
except,  in each case, where any such invalidity, failure to be binding, failure
to so perform or default,  individually or in the  aggregate, would not have  or
reasonably be expected to have a Material Adverse Effect on Parent.

    4.15.   AGREEMENTS WITH REGULATORY AGENCIES.  Except as set forth in Section
4.15  of  the  Parent  Disclosure  Schedule,  neither  Parent  nor  any  of  its
Subsidiaries  is subject to any cease-and-desist or other order issued by, or is
a  party  to  any  written   agreement,  consent  agreement  or  memorandum   of
understanding  with,  or  is  a  party  to  any  commitment  letter  or  similar
undertaking to, or is subject to any  order or directive by, or has adopted  any
board  resolutions at the request of (each,  whether or not set forth in Section
4.15 of the Parent  Disclosure Schedule, a  "Parent Regulatory Agreement"),  any
Regulatory Agency or other Governmental Entity that restricts the conduct of its
business  or that  in any  manner relates  to its  capital adequacy,  its credit
policies, its  management  or  its  business,  nor has  Parent  or  any  of  its
Subsidiaries  been advised by any Regulatory Agency or other Governmental Entity
that it is considering issuing or requesting any Regulatory Agreement.

    4.16.  UNDISCLOSED LIABILITIES.  Except for those liabilities that are fully
reflected or  reserved  against on  the  consolidated balance  sheet  of  Parent
included  in the Parent Form  10-Q for the quarter ended  June 30, 1995, and for
liabilities incurred in  the ordinary  course of business  consistent with  past
practice,  since June 30, 1995,  neither Parent nor any  of its Subsidiaries has
incurred any  liability of  any nature  whatsoever (whether  absolute,  accrued,
contingent  or otherwise and whether due or to become due) that, either alone or
when combined with  all similar  liabilities, has  had, or  would reasonably  be
expected to have, a Material Adverse Effect on Parent.

    4.17.   STATE  TAKEOVER LAWS;  CERTIFICATE OF  INCORPORATION.   The Board of
Directors of Parent has  approved the execution of  the Parent Option  Agreement
and authorized and approved the Merger (prior to the execution by Parent of this
Agreement  and  prior  to  the  execution of  the  Parent  Option  Agreement) in
accordance  with  Section  203  of  the  DGCL  and  Article  Eight  of  Parent's
Certificate  of Incorporation such  that Section 203 and  Article Eight will not
apply to this Agreement, the Parent  Option Agreement, the Parent Fee Letter  or
the  transactions contemplated  hereby and  thereby. The  Board of  Directors of
Parent has taken all such action required to be taken by it to provide that this
Agreement,  the  Parent  Option  Agreement,  the  Parent  Fee  Letter  and   the
transactions   contemplated  hereby  and  thereby   shall  be  exempt  from  the
requirements of  any  "moratorium,"  "control  share,"  "fair  price"  or  other
anti-takeover laws or regulations of any state.

    4.18.   RIGHTS AGREEMENT.   Subject to the execution  of an amendment to the
Parent Rights Agreement which has been  approved by Parent's Board of  Directors
and  shall  be  executed as  promptly  as  practicable after  the  date  of this
Agreement, Parent has taken all action (including, if required, redeeming all of
the outstanding preferred stock  purchase rights issued  pursuant to the  Parent
Rights Agreement or amending or terminating the Parent Rights Agreement) so that
the  entering  into  of  the  Parent  Documents  and  the  consummation  of  the
transactions contemplated hereby and thereby do  not and will not result in  the
grant of any rights to any person under the Parent Rights Agreement or enable or
require the Parent Rights to be exercised, distributed or triggered.

    4.19.   POOLING OF INTERESTS.  As of  the date of this Agreement, Parent has
no reason to believe that the Merger will not qualify as a pooling of  interests
for accounting purposes.

                                      A-22
<PAGE>
    4.20.    PARENT INFORMATION.   The  information relating  to Parent  and its
Subsidiaries to  be  provided by  Parent  to be  contained  in the  Joint  Proxy
Statement  and the S-4, or in any other document filed with any other regulatory
agency in  connection herewith,  will  not contain  any  untrue statement  of  a
material  fact or omit to state a material fact necessary to make the statements
therein, in light of the circumstances  in which they are made, not  misleading.
The  Joint Proxy Statement (except for such portions thereof that relate only to
Subject Company or any of its Subsidiaries) will comply in all material respects
with  the  provisions  of  the  Exchange  Act  and  the  rules  and  regulations
thereunder.  The S-4 will comply in all material respects with the provisions of
the Securities Act and the rules and regulations thereunder.

    4.21.  ENVIRONMENTAL LIABILITY.  Except as set forth in Section 4.21 of  the
Parent  Disclosure  Schedule, there  are no  legal, administrative,  arbitral or
other proceedings,  claims, actions,  causes  of action,  private  environmental
investigations  or remediation activities or  governmental investigations of any
nature seeking to impose, or that reasonably would be expected to result in  the
imposition,  on Parent or any of its Subsidiaries of any liability or obligation
arising under any  Environmental Law, pending  or, to the  knowledge of  Parent,
threatened,  against  Parent  or any  of  its Subsidiaries,  which  liability or
obligation would reasonably  be expected to  have a Material  Adverse Effect  on
Parent.  To the knowledge of  Parent, there is no  reasonable basis for any such
proceeding, claim, action  or governmental investigation  that would impose  any
liability  or obligation  that would reasonably  be expected to  have a Material
Adverse Effect on Parent.  To the knowledge  of Parent, during  or prior to  the
period  of (i) its or any of its  Subsidiaries' ownership or operation of any of
their respective  current  properties, (ii)  its  or any  of  its  Subsidiaries'
participation  in the  management of any  property, or  (iii) its or  any of its
Subsidiaries' holding of a security interest or other interest in any  property,
there  were no releases or threatened  releases of hazardous, toxic, radioactive
or dangerous materials or other materials regulated under Environmental Laws in,
on, under  or  affecting  any such  property.  Neither  Parent nor  any  of  its
Subsidiaries  is subject  to any agreement,  order, judgment,  decree, letter or
memorandum by or with  any court, governmental  authority, regulatory agency  or
third  party imposing any material liability  or obligation pursuant to or under
any Environmental  Law that  would reasonably  be expected  to have  a  Material
Adverse Effect on Parent.

    4.22.   INTEREST RATE RISK MANAGEMENT INSTRUMENTS.  All interest rate swaps,
caps, floors  and option  agreements  and other  interest rate  risk  management
arrangements,  whether entered into for the account of Parent or for the account
of a  customer of  Parent  or one  of its  Subsidiaries,  were entered  into  in
accordance  with prudent banking practices and applicable rules, regulations and
policies of  any regulatory  authority and  with counterparties  believed to  be
financially responsible at the time and are legal, valid and binding obligations
of  Parent or one of its Subsidiaries 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. Parent and  each of its Subsidiaries have duly  performed
in  all material  respects all of  their material obligations  thereunder to the
extent  that  such  obligations  to  perform  have  accrued;  and,  to  Parent's
knowledge, there are no material 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 Parent.

                                   ARTICLE V.
                   COVENANTS RELATING TO CONDUCT OF BUSINESS

    5.1.  CONDUCT  OF BUSINESSES PRIOR  TO THE  EFFECTIVE TIME.   Except as  set
forth  in  the  Subject Company  Disclosure  Schedule or  the  Parent Disclosure
Schedule, as the case may be, during the period from the date of this  Agreement
to  the Effective  Time, except as  expressly contemplated or  permitted by this
Agreement or the  Option Agreements or  as required by  applicable law, each  of
Parent  and  Subject Company  shall, and  shall cause  each of  their respective
Subsidiaries to, (i)  conduct its business  in the usual,  regular and  ordinary
course consistent with past practice, (ii) use reasonable

                                      A-23
<PAGE>
best  efforts  to  maintain  and  preserve  intact  its  business  organization,
employees and advantageous business relationships and retain the services of its
officers and key employees  and (iii) take no  action which would reasonably  be
expected  to adversely affect or  delay the ability of  either Parent or Subject
Company to obtain any approvals of  any Regulatory Agency or other  governmental
authority  required to consummate the transactions contemplated hereby or by the
Option Agreements or to perform its  covenants and agreements under the  Subject
Company Documents or the Parent Documents, as the case may be.

    5.2    FORBEARANCES.   Except as  set forth  in Section  5.2 of  the Subject
Company Disclosure Schedule or Section 5.2 of the Parent Disclosure Schedule, as
the case  may be,  during the  period from  the date  of this  Agreement to  the
Effective  Time  and,  except as  expressly  contemplated or  permitted  by this
Agreement or the  Option Agreements or  as required by  applicable law, rule  or
regulation,  neither Parent  nor Subject Company  shall, and  neither Parent nor
Subject Company shall permit  any of their  respective Subsidiaries to,  without
the prior written consent of the other:

    (a) adjust, split, combine or reclassify any capital stock; make, declare or
pay  any dividend or make  any other distribution on,  or directly or indirectly
redeem, purchase or otherwise  acquire, any shares of  its capital stock or  any
securities or obligations convertible into or exchangeable for any shares of its
capital  stock, or grant any stock  appreciation rights or grant any individual,
corporation or other entity any right to acquire any shares of its capital stock
(except for regular quarterly cash dividends on Subject Company Common Stock and
on Parent Common Stock  at a rate equal  to the rates recently  paid by each  of
Subject  Company and Parent, as the case may  be, as such rates may be increased
by either party in the ordinary course of business consistent with past practice
and, in the case of Subject Company Preferred Stock and Parent Preferred  Stock,
for  regular quarterly  or semiannual  cash dividends  thereon at  the rates set
forth  in  the  applicable  certificate  of  incorporation  or  certificate   of
designation  for such  securities and  except for dividends  paid by  any of the
wholly owned Subsidiaries  of each of  Parent and Subject  Company to Parent  or
Subject  Company or  any of their  wholly owned  Subsidiaries, respectively, and
except  for  the  issuance  of  employee  stock  options  and  restricted  stock
consistent with past practices); or issue any additional shares of capital stock
except  pursuant  to (A)  the exercise  of  stock options,  PSPRs or  risk event
warrants outstanding as of the date hereof, (B) the vesting of Performance Units
outstanding as  of the  date hereof  pursuant to  Subject Company  Stock  Option
Plans,  (C) the conversion of shares of Parent Series 1991A Preferred Stock, (D)
the Subject Company Rights Agreement, (E)  the Parent Rights Agreement, (F)  the
FirsTier  Acquisition,  (G)  the  Option  Agreements  and  (H)  acquisitions and
investments permitted by paragraph (c) hereof;

    (b) sell, transfer, mortgage,  encumber or otherwise dispose  of any of  its
properties or assets to any individual, corporation or other entity other than a
direct  or indirect  wholly owned Subsidiary,  or cancel, release  or assign any
indebtedness to any such person or any  claims held by any such person, in  each
case  that  is material  to such  party, except  (i) in  the ordinary  course of
business consistent with past practice, (ii) pursuant to contracts or agreements
in force at the date of this  Agreement or (iii) pursuant to plans disclosed  in
writing prior to the execution of this Agreement to the other party;

    (c)  except  for  (i)  transactions  in  the  ordinary  course  of  business
consistent with past  practice, or (ii)  acquisitions of an  entity or  business
having assets not exceeding 10% of the consolidated assets of Subject Company or
Parent,  as applicable, on a pro forma  basis giving effect to such transaction,
make any  material acquisition  or investment  either by  purchase of  stock  or
securities,   merger  or  consolidation,   contributions  to  capital,  property
transfers, or  purchases of  any property  or assets  of any  other  individual,
corporation or other entity other than a wholly owned Subsidiary thereof;

    (d)  except for transactions  in the ordinary  course of business consistent
with past practice, enter into or  terminate any contract or agreement, or  make
any  change in any of its leases or  contracts, in each case that is material to
such party,  other than  renewals  of contracts  and leases  without  materially
adverse changes of terms thereof;

                                      A-24
<PAGE>
    (e)  other than (i) in the ordinary  course of business consistent with past
practice, or (ii) in an aggregate amount not exceeding $10 million, increase  in
any material respect the compensation or fringe benefits of any of its employees
or  pay any pension or retirement allowance not required by any existing plan or
agreement to any such employees or become a party to, amend or commit itself  to
any  material  pension, retirement,  profit-sharing or  welfare benefit  plan or
agreement or employment  agreement with or  for the benefit  of any employee  or
accelerate the vesting of any stock options or other stock-based compensation;

    (f)  authorize or permit any of its officers, directors, employees or agents
to directly or indirectly solicit, initiate or encourage any inquiries  relating
to,  or the making  of any proposal  which constitutes, a  Takeover Proposal (as
defined below), or recommend or endorse any Takeover Proposal, or participate in
any discussions or negotiations,  or provide third  parties with any  non-public
information,  relating to any  such inquiry or  proposal or otherwise facilitate
any effort  or attempt  to  make or  implement  a Takeover  Proposal,  PROVIDED,
HOWEVER,  that each  of Parent  and Subject Company  may, and  may authorize and
permit its officers, directors,  employees or agents  to, provide third  parties
with  nonpublic information, otherwise  facilitate any effort  or attempt by any
third party to make or implement  a Takeover Proposal, recommend or endorse  any
Takeover Proposal with or by any third party, and participate in discussions and
negotiations  with any  third party relating  to any Takeover  Proposal, if such
party's Board  of Directors,  after  having consulted  with and  considered  the
advice  of outside  counsel, has  reasonably determined  in good  faith that the
failure to do so would  cause the members of such  Board of Directors to  breach
their  fiduciary duties under  applicable law. Subject  Company will immediately
cease and cause  to be  terminated any activities,  discussions or  negotiations
conducted prior to the date of this Agreement with any parties other than Parent
with  respect to any of  the foregoing. Each party  shall immediately advise the
other following  the receipt  by it  of any  Takeover Proposal  and the  details
thereof,  and advise the other of any developments with respect to such Takeover
Proposal immediately upon  the occurrence  thereof. As used  in this  Agreement,
"Takeover  Proposal"  shall mean,  with  respect to  any  person, any  tender or
exchange  offer,  proposal  for  a  merger,  consolidation  or  other   business
combination  involving  Subject Company  or Parent  or  any of  their respective
Subsidiaries or any  proposal or offer  to acquire in  any manner a  substantial
equity  interest in, or a substantial portion  of the assets of, Subject Company
or Parent or any  of their respective Subsidiaries  other than the  transactions
contemplated or permitted by this Agreement;

    (g)  settle any claim, action or proceeding involving money damages which is
material to Parent  or Subject Company,  as applicable, except  in the  ordinary
course of business consistent with past practice;

    (h)  take any action that would prevent or impede the Merger from qualifying
(i) for pooling of  interests accounting treatment or  (ii) as a  reorganization
within  the  meaning of  Section  368(a) of  the  Code; PROVIDED,  HOWEVER, that
nothing contained herein shall limit the ability of Parent or Subject Company to
exercise its  rights under  the  Subject Company  Option Agreement,  the  Parent
Option  Agreement, the Subject Company  Fee Letter or the  Parent Fee Letter, as
the case may be;

    (i) amend  its certificate  of incorporation,  bylaws or  similar  governing
documents or the Parent Rights Agreement or Subject Company Rights Agreement, as
the  case may be,  in any case in  a manner that  would materially and adversely
effect either party's ability to consummate the Merger or the economic  benefits
of the Merger to either party;

    (j)   except in the ordinary course or following prior consultation with the
other party  to  this Agreement,  materially  change its  investment  securities
portfolio  policy,  or  the  manner  in which  the  portfolio  is  classified or
reported;

    (k) take any action that is intended or may reasonably be expected to result
in any of its representations and  warranties set forth in this Agreement  being
or  becoming untrue in any  material respect at any  time prior to the Effective
Time, or in any  of the conditions to  the Merger set forth  in Article VII  not
being satisfied or in a violation of any provision of this Agreement, except, in
every case, as may be required by applicable law; or

                                      A-25
<PAGE>
    (l)  agree to, or make any commitment to, take any of the actions prohibited
by this Section 5.2.

                                  ARTICLE VI.
                             ADDITIONAL AGREEMENTS

    6.1.  REGULATORY  MATTERS.  (a)  Parent and Subject  Company shall  promptly
prepare and file with the SEC a preliminary version of the Joint Proxy Statement
and,  following comment thereon, Parent shall promptly prepare and file with the
SEC the S-4, in which the definitive Joint Proxy Statement will be included as a
prospectus. Each of Parent and Subject Company shall use all reasonable  efforts
to  have the  S-4 declared  effective under  the Securities  Act as  promptly as
practicable after such filing, and  Parent and Subject Company shall  thereafter
mail  the  definitive Joint  Proxy Statement  to their  respective stockholders.
Parent shall  also use  all reasonable  efforts to  obtain all  necessary  state
securities  law or "Blue  Sky" permits and  approvals required to  carry out the
transactions contemplated by this Agreement,  and Subject Company shall  furnish
all  information concerning Subject  Company and the  holders of Subject Company
Capital Stock as may be reasonably requested in connection with any such action.

    (b) The parties hereto  shall cooperate with each  other and use  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 Entities which are necessary or advisable to consummate
the  transactions contemplated  by this Agreement  (including without limitation
the Merger), and to comply  with the terms and  conditions of all such  permits,
consents, approvals and authorizations of all such Governmental Entities. Parent
and Subject Company 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
Subject  Company or  Parent, as  the case  may be,  and any  of their respective
Subsidiaries which  appear  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 and  each party will keep the  other
apprised  of the  status of matters  relating to completion  of the transactions
contemplated herein.

    (c) Parent and Subject Company shall, upon request, furnish each other  with
all  information concerning themselves,  their Subsidiaries, directors, officers
and stockholders  and such  other  matters as  may  be reasonably  necessary  or
advisable  in connection with  the Joint Proxy  Statement, the S-4  or any other
statement, filing, notice or application made by or on behalf of Parent, Subject
Company or any of  their respective Subsidiaries to  any Governmental Entity  in
connection  with  the Merger  and the  other  transactions contemplated  by this
Agreement.

    (d) Parent  and  Subject  Company  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 below) will not be
obtained or that the receipt of any such approval will be materially delayed.

    6.2.  ACCESS  TO INFORMATION.   (a) Upon  reasonable notice  and subject  to
applicable  laws relating  to the  exchange of  information, each  of Parent and
Subject Company shall, and shall cause each of their respective Subsidiaries to,
afford  to   the   officers,   employees,   accountants,   counsel   and   other
representatives  of the other party access,  during normal business hours during
the period prior to the Effective Time, to all its properties, books, contracts,
commitments and records,  and to its  officers, employees, accountants,  counsel
and   other   representatives  and,   during   such  period,   each   of  Parent

                                      A-26
<PAGE>
and Subject Company  shall, and  shall cause their  respective Subsidiaries  to,
make  available  to  the  other  party (i)  a  copy  of  each  report, schedule,
registration statement and other  document filed or received  by it during  such
period  pursuant to  the requirements of  Federal securities laws  or Federal or
state banking laws  (other than  reports or  documents which  Parent or  Subject
Company,  as the case may be, is not permitted to disclose under applicable law)
and (ii) all other information concerning its business, properties and personnel
as such other party may reasonably  request. Neither Parent nor Subject  Company
nor  any of their respective Subsidiaries shall be required to provide access to
or to disclose  information where  such access  or disclosure  would violate  or
prejudice  the rights of its customers, jeopardize the attorney-client privilege
of the institution in  possession or control of  such information or  contravene
any  law, rule, regulation,  order, judgment, decree,  fiduciary duty or binding
agreement entered into prior to the  date of this Agreement. The parties  hereto
will  make appropriate substitute disclosure arrangements under circumstances in
which the restrictions of the preceding sentence apply.

    (b) Each of Parent and Subject Company shall hold all information  furnished
by  the  other party  or  any of  such  party's Subsidiaries  or representatives
pursuant to  Section 6.2(a)  in confidence  to the  extent required  by, and  in
accordance  with, the provisions of the confidentiality agreement, dated October
21, 1995 between Parent and Subject Company (the "Confidentiality Agreement").

    (c)  No  investigation  by  either  of  the  parties  or  their   respective
representatives  shall  affect  the  representations,  warranties,  covenants or
agreements of the other set forth herein.

    6.3.  STOCKHOLDERS'  APPROVALS.  Each  of Parent and  Subject Company  shall
duly  call, give notice of, convene and hold a meeting of its stockholders to be
held as  soon  as practicable  following  the date  hereof  for the  purpose  of
obtaining  the requisite stockholder approvals  required in connection with this
Agreement and the  Merger, and each  shall use  its best efforts  to cause  such
meetings  to  occur on  the same  date. Subject  to the  provisions of  the next
sentence, each  of  Parent and  Subject  Company  shall, through  its  Board  of
Directors,  recommend to its stockholders approval of such matters. The Board of
Directors of  each party  may fail  to make  such recommendation,  or  withdraw,
modify  or change any such recommendation in a manner adverse to the other party
hereto, if such Board of Directors,  after having consulted with and  considered
the  advice of outside counsel, has reasonably determined in good faith that the
making of such recommendation, or the failure to withdraw, modify or change  its
recommendation, would constitute a breach of the fiduciary duties of the members
of such Board of Directors under applicable law.

    6.4.   LEGAL CONDITIONS TO MERGER.   (a) Subject to the terms and conditions
of this Agreement, each of Parent and Subject Company shall, and shall cause its
Subsidiaries to use their reasonable  best efforts (i) to  take, or cause to  be
taken,  all actions necessary,  proper or advisable to  comply promptly with all
legal requirements which may be imposed  on such party or its Subsidiaries  with
respect  to the Merger and,  subject to the conditions  set forth in Article VII
hereof, to consummate the transactions  contemplated by this Agreement and  (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 any other  third party which  is required to  be obtained by Subject
Company or Parent or any of their respective Subsidiaries in connection with the
Merger and the other transactions contemplated by this Agreement.

    (b) Subject to the  terms and conditions of  this Agreement, each of  Parent
and  Subject Company agrees to use reasonable  best efforts to take, or cause to
be taken, all actions,  and to do,  or cause to be  done, all things  necessary,
proper  or advisable  to consummate and  make effective, as  soon as practicable
after  the  date  of  this  Agreement,  the  transactions  contemplated  hereby,
including,  without limitation, using reasonable efforts  to lift or rescind any
injunction or restraining order or  other order adversely affecting the  ability
of  the parties  to consummate  the transactions  contemplated hereby  and using
reasonable efforts to defend any litigation seeking to enjoin, prevent or  delay
the  consummation of  the transactions  contemplated hereby  or seeking material
damages.

                                      A-27
<PAGE>
    6.5.  AFFILIATES; PUBLICATION OF COMBINED FINANCIAL RESULTS.  Each of Parent
and Subject  Company  shall  use  its reasonable  best  efforts  to  cause  each
director, executive officer and other person who is an "affiliate" (for purposes
of  Rule 145 under the Securities Act  and for purposes of qualifying the Merger
for "pooling-of-interests" accounting treatment) of such party to deliver to the
other party hereto, as soon as practicable after the date of this Agreement, and
in any event prior to the date of the stockholders meetings called by Parent and
Subject Company pursuant to Section 6.3 hereof, a written agreement, in the form
of Exhibit  6.5(a) hereto  (in the  case of  affiliates of  Subject Company)  or
Exhibit 6.5(b) hereto (in the case of affiliates of Parent).

    6.6.   STOCK EXCHANGE LISTING.   Parent shall use  its best efforts to cause
the shares of Parent Common Stock to be issued in the Merger and the New  Parent
Depositary  Shares to be approved  for listing on the  NYSE, subject to official
notice of issuance, prior to the Effective Time.

    6.7.  EMPLOYEE BENEFIT PLANS.  (a) From and after the Effective Time, unless
otherwise mutually  determined and  except as  provided in  Section 1.7  hereof,
Parent  Plans and Plans in effect as of  the date of this Agreement shall remain
in effect  with respect  to employees  of Parent  or Subject  Company (or  their
Subsidiaries)  covered by such  plans at the  Effective Time until  such time as
Parent shall, subject  to applicable law,  the terms of  this Agreement and  the
terms of such plans, adopt new benefit plans with respect to employees of Parent
and its Subsidiaries (including without limitation the Surviving Corporation and
its  Subsidiaries) (the "New  Parent Plans"). Prior to  the Closing Date, Parent
and Subject Company shall cooperate  in reviewing, evaluating and analyzing  the
Parent  Plans and the Plans with a view toward developing appropriate New Parent
Plans for the  employees covered thereby  subsequent to the  Merger. Parent  and
Subject  Company shall use  their reasonable best efforts  to develop New Parent
Plans which, among other  things, treat similarly  situated employees of  Parent
and its Subsidiaries (including without limitation the Surviving Corporation and
its  Subsidiaries) on a substantially equivalent  basis, taking into account all
relevant factors, including,  without limitation,  duties, geographic  location,
tenure,  qualifications and abilities.  Parent agrees that  if it establishes or
continues employee  benefit plans  (including severance  plans) under  which  an
employee's  benefit depends,  in whole  or in  part, on  length of  service with
Subject Company or Parent prior to the Effective Time, credit will be given,  to
the  extent reasonably practicable, for service  credited under similar plans of
Subject Company  or Parent  or  any Subsidiary  of  either, PROVIDED  that  such
crediting of service does not result in duplication of benefits.

    (b)  Notwithstanding  the  foregoing,  Parent  shall,  and  shall  cause its
Subsidiaries to, honor in accordance with their terms all benefits vested as  of
the  date  hereof under  the Parent  Plans  or Plans  or under  other contracts,
arrangements, commitments or understandings  described in the Parent  Disclosure
Schedule and the Subject Company Disclosure Schedule. Parent and Subject Company
hereby  acknowledge that  the Merger will  constitute a "Change  in Control" for
purposes of the Parent Plans and the Plans and agree to abide by the  provisions
of  any Plan or Parent Plan which relate  to a Change in Control, including, but
not limited to, the  accelerated vesting and/or  payment of equity-based  awards
under the Parent Stock Option Plans and the Subject Company Stock Option Plans.

    (c) Nothing in this Section 6.7 shall be interpreted as preventing Parent or
its  Subsidiaries  from amending,  modifying  or terminating  any  Parent Plans,
Plans, or  other  contracts,  arrangements, commitments  or  understandings,  in
accordance with their terms and applicable law.

    (d) It is the express understanding and intention of Subject Company, Parent
and  Merger Sub  that no  Subject Company Employee  or Parent  Employee or other
person shall be deemed to be a  third party beneficiary, or have or acquire  any
right  to enforce the provisions, of this  Section 6.7, and that nothing in this
Agreement shall be deemed to  constitute a Plan, a Parent  Plan or a New  Parent
Plan or an amendment to a Plan, a Parent Plan or a New Parent Plan.

    6.8.   INDEMNIFICATION;  DIRECTORS' AND  OFFICERS' INSURANCE.   (a)  Each of
Subject Company and Parent agrees that from and after the Effective Time, Parent
will indemnify and hold harmless each present and former director and officer of
Subject Company and Parent and  their respective Subsidiaries, determined as  of
the Effective Time (the "Indemnified Parties"), against any costs or expenses

                                      A-28
<PAGE>
(including  reasonable  attorneys'  fees),  judgments,  fines,  losses,  claims,
damages or liabilities  (collectively "Costs") incurred  in connection with  any
claim,  action,  suit,  proceeding or  investigation,  whether  civil, criminal,
administrative or  investigative,  arising  out  of  or  pertaining  to  matters
existing  or occurring at  or prior to  the Effective Time,  whether asserted or
claimed prior to, at  or after the  Effective Time, to  the fullest extent  that
Subject  Company, Parent,  or such  Subsidiary would  have been  permitted under
Delaware law and the certificate of incorporation or by-laws of Subject Company,
Parent or such Subsidiary in effect on the date hereof to indemnify such  person
(and  Parent  shall also  advance  expenses as  incurred  to the  fullest extent
permitted under applicable law; PROVIDED, that  the person to whom expenses  are
advanced  provides an  undertaking to  repay such  advances if  it is ultimately
determined that such person is not entitled to indemnification).

    (b) To the extent that paragraph (a)  shall not serve to indemnify and  hold
harmless  an Indemnified Party,  for a period  of six years  after the Effective
Time, each of Subject  Company and Parent agrees  that Parent shall, subject  to
the  terms set forth herein, indemnify and  hold harmless, to the fullest extent
permitted under  applicable  law (and  Parent  shall also  advance  expenses  as
incurred  to the fullest  extent permitted under  applicable law, PROVIDED, that
the person to whom expenses are  advanced provides an undertaking to repay  such
advances  if it  is ultimately  determined that such  person is  not entitled to
indemnification),  each  Indemnified  Party   against  any  Costs  incurred   in
connection  with any claim,  action, suit, proceeding  or investigation, whether
civil, criminal, administrative or investigative,  arising out of or  pertaining
to the transactions contemplated by this Agreement, the Option Agreements or the
Fee  Letters. In the event any claim or  claims are asserted or made within such
six-year period, all rights to indemnification  in respect of any such claim  or
claims shall continue until final disposition of any and all such claims.

    (c)  Any Indemnified  Party wishing  to claim  indemnification under Section
6.8(a) or (b),  upon learning  of any such  claim, action,  suit, proceeding  or
investigation,  shall  promptly notify  Parent thereof,  but  the failure  to so
notify shall not relieve Parent of any liability it may have to such Indemnified
Party except to  the extent such  failure materially prejudices  Parent. In  the
event  of any  such claim,  action, suit,  proceeding or  investigation (whether
arising before or  after the  Effective Time), Parent  shall have  the right  to
assume  the defense thereof and  Parent shall not be  liable to such Indemnified
Parties  for  any  legal  expenses  of  other  counsel  or  any  other  expenses
subsequently incurred by such Indemnified Parties in connection with the defense
thereof, except that, if Parent elects not to assume such defense or counsel for
the  Indemnified Parties advises that there  are issues which raise conflicts of
interest between Parent and the Indemnified Parties, the Indemnified Parties may
retain counsel satisfactory to  them, and Parent shall  pay all reasonable  fees
and  expense of such counsel for  the Indemnified Parties promptly as statements
therefor are received. If  such indemnity is not  available with respect to  any
Indemnified Party, then Parent and the Indemnified Party shall contribute to the
amount  payable in such proportion as  is appropriate to reflect relative faults
and benefits.

    (d) From and after the Effective Time, the directors, officers and employees
of Subject  Company  and its  Subsidiaries  who become  directors,  officers  or
employees  of Parent or any of  its Subsidiaries, except for the indemnification
rights set  forth  in Section  6.8(a)  or 6.8(b)  or  as otherwise  provided  by
applicable  law,  shall  have  indemnification  rights  (with  respect  to their
capacities as  directors,  officers  or  employees  of  Parent  or  any  of  its
Subsidiaries   at  or  subsequent  to   the  Effective  Time)  with  prospective
application only. The prospective indemnification  rights shall consist of  such
rights to which directors, officers and employees of Parent and its Subsidiaries
are entitled under the provisions of the Certificate of Incorporation or similar
governing  documents of Parent and  its Subsidiaries, as in  effect from time to
time after the Effective Time, as  applicable, and provisions of applicable  law
as in effect from time to time after the Effective Time.

    (e) In the event Parent or any of its successors or assigns (i) consolidates
with  or  merges  into any  other  person and  shall  not be  the  continuing or
surviving corporation or entity of such consolidation

                                      A-29
<PAGE>
or merger,  or  (ii)  transfers or  conveys  all  or substantially  all  of  its
properties  and assets to any person, then, and in each such case, to the extent
necessary, proper provision shall be made so that the successors and assigns  of
Parent assume the obligations set forth in this section.

    (f)  For a period of six years from the Effective Time, Parent shall use its
best efforts  to provide  that  portion of  directors' and  officers'  liability
insurance that serves to reimburse the present and former officers and directors
of  Parent, Subject Company or any  of their respective Subsidiaries (determined
as of the Effective Time) (as opposed to Parent or Subject Company) with respect
to claims against such officers and directors arising from facts or events which
occurred before the Effective Time, which  insurance shall contain at least  the
same   coverage  and  amounts,   and  contain  terms   and  conditions  no  less
advantageous, as that coverage currently provided by Parent; PROVIDED,  HOWEVER,
that  the annual premiums for  such coverage will not  exceed 200% of the annual
premiums currently paid by Subject Company for such coverage; PROVIDED, FURTHER,
that officers and directors of Subject Company or any Subsidiary may be required
to make  application and  provide customary  representations and  warranties  to
Parent's  insurance carrier  for the  purpose of  obtaining such  insurance; and
PROVIDED, FURTHER, that  such coverage  will have  a single  aggregate for  such
six-year period in an amount not less than the annual aggregate of such coverage
currently provided by Subject Company.

    (g)  The provisions of this  Section 6.8 are intended  to be for the benefit
of, and shall be enforceable by, each Indemnified Party and his or her heirs and
representatives.

    6.9  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 (including, without  limitation, any  merger between  a Subsidiary  of
Parent and a Subsidiary of Subject Company) or to vest the Surviving Corporation
with  full title  to all properties,  assets, rights,  approvals, immunities and
franchises of  any  of  the parties  to  the  merger, the  proper  officers  and
directors  of each  party to  this Agreement  and their  respective Subsidiaries
shall take all such necessary action as  may be reasonably requested by, and  at
the sole expense of, Parent.

    6.10   ADVICE OF CHANGES.  Parent  and Subject Company 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.

    6.11   DIVIDENDS.   After  the date  of this  Agreement, each  of Parent and
Subject Company shall coordinate with the other the declaration of any dividends
in respect  of Parent  Common Stock  and Subject  Company Common  Stock and  the
record  dates and payment dates relating thereto,  it being the intention of the
parties hereto that  holders of Parent  Common Stock or  Subject Company  Common
Stock shall not receive more than one dividend, or fail to receive one dividend,
for  any single calendar quarter  with respect to their  shares of Parent Common
Stock and/or Subject Company Common Stock and any shares of Parent Common  Stock
any such holder receives in exchange therefor in the Merger.

    6.12   MERGER  SUB.   Parent shall  cause Merger  Sub to  take all necessary
action to complete the  transactions contemplated hereby,  subject to the  terms
and conditions hereof.

    6.13    SUBSEQUENT INTERIM  AND  ANNUAL FINANCIAL  STATEMENTS.   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
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.

                                      A-30
<PAGE>
                                  ARTICLE VII.
                              CONDITIONS PRECEDENT

    7.1   CONDITIONS TO  EACH PARTY'S  OBLIGATION  TO EFFECT  THE MERGER.    The
respective  obligations of each party  to effect the Merger  shall be subject to
the satisfaction at or prior to the Effective Time of the following conditions:

    (a)  STOCKHOLDER APPROVAL.  This Agreement and the transactions contemplated
hereby shall have been approved and  adopted by the requisite affirmative  votes
of  the holders of Subject Company Common Stock entitled to vote thereon and the
Parent Vote Matters shall have been  approved by the requisite affirmative  vote
of the holders of Parent Common Stock entitled to vote thereon.

    (b)   NYSE LISTING.  The shares of Parent Common Stock which shall be issued
to the stockholders of Subject Company  upon consummation of the Merger and  the
New Parent Depositary Shares shall have been authorized for listing on the NYSE,
subject to official notice of issuance.

    (c)   OTHER APPROVALS.  All  regulatory approvals required to consummate the
transactions contemplated hereby shall  have been obtained  and shall remain  in
full force and effect and all statutory waiting periods in respect thereof shall
have  expired (all such approvals and the expiration of all such waiting periods
being referred to herein  as the "Requisite Regulatory  Approvals") and no  such
approval  shall  contain  any  conditions or  restrictions  which  the  Board of
Directors of  either Parent  or Subject  Company reasonably  determines in  good
faith  will have or reasonably be expected  to have a Material Adverse Effect on
Parent and  its  Subsidiaries  (including  the  Surviving  Corporation  and  its
Subsidiaries) taken as a whole.

    (d)   S-4.  The S-4 shall have become effective under the Securities Act and
no stop order 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.

    (e)   NO  INJUNCTIONS OR  RESTRAINTS; ILLEGALITY.   No  order, injunction or
decree issued by any  court or agency of  competent jurisdiction or other  legal
restraint  or prohibition (an  "Injunction") preventing the  consummation of the
Merger or any of the other transactions contemplated by this Agreement shall  be
in  effect. No statute, rule, regulation, order, injunction or decree shall have
been enacted, entered, promulgated or enforced by any Governmental Entity  which
prohibits, restricts or makes illegal the consummation of the Merger.

    7.2   CONDITIONS  TO OBLIGATIONS  OF PARENT.   The  obligation of  Parent to
effect the Merger is also subject to the satisfaction or waiver by Parent at  or
prior to the Effective Time of the following conditions:

    (a)  REPRESENTATIONS AND WARRANTIES.  (i) The representations and warranties
of Subject Company set forth in Sections 3.2, 3.3(a), 3.6, 3.8(a), 3.17 and 3.18
of  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  (ii) the  representations and  warranties of
Subject Company  set  forth in  this  Agreement other  than  those  specifically
enumerated  in clause (i) hereof shall be true and correct in all 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; PROVIDED, HOWEVER, that for purposes of determining
the satisfaction of the condition contained in this clause (ii), no effect shall
be given to  any exception in  such representations and  warranties relating  to
materiality  or a Material Adverse Effect, and PROVIDED, FURTHER, HOWEVER, that,
for purposes of this clause (ii),  such representations and warranties shall  be
deemed  to be true and correct in all respects unless the failure or failures of
such representations and warranties to be  so true and correct, individually  or
in  the  aggregate, results  or  would reasonably  be  expected to  result  in a
Material

                                      A-31
<PAGE>
Adverse Effect on Subject Company and its Subsidiaries taken as a whole.  Parent
shall have received a certificate signed on behalf of the Subject Company by the
Chief  Executive Officer and  Chief Financial Officer of  Subject Company to the
foregoing effect.

    (b)  PERFORMANCE OF OBLIGATIONS OF  SUBJECT COMPANY.  Subject Company  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 Parent shall
have received a  certificate signed on  behalf of Subject  Company by the  Chief
Executive  Officer and  the Chief Financial  Officer of Subject  Company to such
effect.

    (c)  SUBJECT COMPANY  RIGHTS AGREEMENT.  The  rights issued pursuant to  the
Subject   Company  Rights   Agreement  shall  not   have  become  nonredeemable,
exercisable, distributed or triggered pursuant to the terms of such agreement.

    (d)  POOLING OF INTERESTS.  Parent shall have received a letter from Ernst &
Young LLP, addressed to Parent,  dated as of the  Effective Time, to the  effect
that the Merger will qualify for "pooling of interests" accounting treatment.

    (e)  FEDERAL TAX OPINION.  Parent shall have received an opinion of Dorsey &
Whitney   P.L.L.P.,  counsel  to  Parent,   in  form  and  substance  reasonably
satisfactory to Parent,  dated as of  the Effective Time,  substantially to  the
effect that, on the basis of facts, representations and assumptions set forth in
such  opinion  which are  consistent with  the  state of  facts existing  at the
Effective Time, the Merger will be treated for Federal income tax purposes as  a
reorganization  within  the  meaning of  Section  368(a)  of the  Code  and that
accordingly:

           (1) No gain or loss will be recognized by Parent, Subject Company  or
       Merger Sub as a result of the Merger;

           (2) No gain or loss will be recognized by the stockholders of Subject
       Company  who  exchange their  Subject  Company Capital  Stock  solely for
       Parent Capital Stock pursuant to the Merger (except with respect to  cash
       received  in lieu of a fractional share interest in Parent Common Stock);
       and

           (3)  The  tax  basis  of   the  Parent  Capital  Stock  received   by
       stockholders  who  exchange all  of their  Subject Company  Capital Stock
       solely for Parent Capital Stock in the Merger will be the same as the tax
       basis of  the  Subject  Company Capital  Stock  surrendered  in  exchange
       therefor  (reduced by any amount allocable to a fractional share interest
       for which cash is received).

    In rendering such opinion,  Dorsey & Whitney P.L.L.P.  may require and  rely
upon  representations and covenants including those contained in certificates of
officers of Parent, Subject Company and Merger Sub and others.

    7.3   CONDITIONS TO  OBLIGATIONS  OF SUBJECT  COMPANY.   The  obligation  of
Subject  Company to  effect the  Merger is also  subject to  the satisfaction or
waiver by Subject Company  at or prior  to the Effective  Time of the  following
conditions:

    (a)  REPRESENTATIONS AND WARRANTIES.  (i) The representations and warranties
of  Parent set forth in Sections 4.2, 4.3(a), 4.3(b), 4.6, 4.8(a), 4.17 and 4.18
of 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 (ii) the representations and warranties of Parent
set forth in this Agreement other  than those specifically enumerated in  clause
(i)  hereof shall be  true and correct  in all 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;  PROVIDED,  HOWEVER,  that   for  purposes  of  determining  the
satisfaction of the condition contained in this clause (ii), no effect shall  be
given  to  any  exception in  such  representations and  warranties  relating to
materiality or a Material Adverse Effect, and PROVIDED, FURTHER, HOWEVER,  that,
for  purposes of this clause (ii),  such representations and warranties shall be
deemed  to  be   true  and   correct  in   all  respects   unless  the   failure

                                      A-32
<PAGE>
or  failures of such representations  and warranties to be  so true and correct,
individually or in  the aggregate, results  or would reasonably  be expected  to
result  in a Material Adverse  Effect on Parent and  its Subsidiaries taken as a
whole. Subject Company  shall have received  a certificate signed  on behalf  of
Parent  by the Chief Executive Officer and the Chief Financial Officer of Parent
to the foregoing effect.

    (b)  PERFORMANCE OF OBLIGATIONS OF  PARENT.  Parent 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  Subject Company  shall  have
received a certificate signed on behalf of Parent by the Chief Executive Officer
and the Chief Financial Officer of Parent to such effect.

    (c)   PARENT  RIGHTS AGREEMENT.   The rights  issued pursuant  to the Parent
Rights Agreement shall not  have become nonredeemable, exercisable,  distributed
or triggered pursuant to the terms of such agreement.

    (d)   POOLING OF  INTERESTS.  Subject  Company shall have  received a letter
from Ernst & Young LLP, addressed to Subject Company, dated as of the  Effective
Time,  to the  effect that  the Merger will  qualify for  "pooling of interests"
accounting treatment.

    (e)  FEDERAL TAX OPINION.  Subject Company shall have received an opinion of
Skadden, Arps, Slate, Meagher  & Flom, counsel to  Subject Company, in form  and
substance  reasonably satisfactory to Subject Company, dated as of the Effective
Time, substantially to the effect that,  on the basis of facts,  representations
and assumptions set forth in such opinion which are consistent with the state of
facts  existing at the  Effective Time, the  Merger will be  treated for Federal
income tax purposes as a reorganization within the meaning of Section 368(a)  of
the Code and that accordingly:

           (1)  No gain or loss will be recognized by Parent, Subject Company or
       Merger Sub as a result of the Merger;

           (2) No gain or loss will be recognized by the stockholders of Subject
       Company who  exchange  their Subject  Company  Capital Stock  solely  for
       Parent  Capital Stock pursuant to the Merger (except with respect to cash
       received in lieu of a fractional share interest in Parent Common  Stock);
       and

           (3)   The  tax  basis  of  the   Parent  Capital  Stock  received  by
       stockholders who  exchange all  of their  Subject Company  Capital  Stock
       solely for Parent Capital Stock in the Merger will be the same as the tax
       basis  of  the  Subject  Company Capital  Stock  surrendered  in exchange
       therefor (reduced by any amount allocable to a fractional share  interest
       for which cash is received).

    In  rendering such opinion, Skadden, Arps, Slate, Meagher & Flom may require
and rely  upon  representations  and  covenants  including  those  contained  in
certificates of officers of Parent, Subject Company and Merger Sub and others.

                                 ARTICLE VIII.
                           TERMINATION AND AMENDMENT

    8.1  TERMINATION.  This Agreement may be terminated at any time prior to the
Effective Time:

    (a) by mutual consent of Parent and Subject Company in a written instrument,
if the Board of Directors of each so determines;

    (b)  by either the Board of Directors of Parent or the Board of Directors of
Subject Company if  (i) any  Governmental Entity  which must  grant a  Requisite
Regulatory Approval has denied approval of the Merger and such denial has become
final   and  nonappealable  or   (ii)  any  Governmental   Entity  of  competent
jurisdiction  shall  have  issued  a  final  nonappealable  order  enjoining  or
otherwise  prohibiting the consummation of the transactions contemplated by this
Agreement;

                                      A-33
<PAGE>
    (c) by either the Board of Directors of Parent or the Board of Directors  of
Subject  Company if  the Merger  shall not  have been  consummated on  or before
December 31,  1996  (or,  if  at  such date  the  Merger  shall  not  have  been
consummated  as a result  of the failure  of the condition  set forth in Section
7.1(e) to be satisfied, and  such condition shall not  have failed to have  been
satisfied  by reason of  the enactment or  promulgation of any  statute, rule or
regulation which  prohibits,  restricts or  makes  illegal consummation  of  the
Merger,  the earlier of  (i) the date  on which such  condition is satisfied and
(ii) June 30, 1997),  unless the failure  of the Closing to  occur by such  date
shall  be due to the failure of the party seeking to terminate this Agreement to
perform or observe the covenants and agreements of such party set forth herein;

    (d) by either the Board of Directors of Parent or the Board of Directors  of
Subject  Company (provided  that the terminating  party is not  then in material
breach of any  representation, warranty, covenant  or other agreement  contained
herein)  if the  other party  shall have  breached (i)  any of  the covenants or
agreements made by such other party herein or (ii) any of the representations or
warranties made by such other party herein, and in either case, such breach  (x)
is  not cured  within thirty  (30) days  following written  notice to  the party
committing such breach, or which breach, by its nature, cannot be cured prior to
the Closing and (y) would entitle the non-breaching party not to consummate  the
transactions contemplated hereby under Article VII hereof;

    (e)  by either the Board of Directors of Parent or the Board of Directors of
Subject Company if  any approval of  the stockholders of  Parent or the  Subject
Company contemplated by this Agreement shall not have been obtained by reason of
the  failure to obtain the required vote  at a duly held meeting of stockholders
or at any adjournment or postponement thereof;

    (f) prior to the  approval of (x)  this Agreement by  the requisite vote  of
Subject  Company's shareholders (if Subject Company is the terminating party) or
(y) the Parent Vote Matters (if Parent is the terminating party), by either  the
Board  of Directors of Parent  or the Board of  Directors of Subject Company, if
there exists at  such time  a Takeover  Proposal for  the party  whose Board  of
Directors  is seeking to terminate this Agreement pursuant to this paragraph (f)
and such Board  of Directors,  after having  consulted with  and considered  the
advice  of outside legal counsel, reasonably  determines in good faith that such
action is necessary  in the exercise  of its fiduciary  duties under  applicable
laws; or

    (g)  by either the Board of Directors of Parent or the Board of Directors of
Subject Company,  if  the Board  of  Directors of  the  other party  shall  have
withdrawn,  modified or changed in a manner adverse to the terminating party its
approval or recommendation of this  Agreement and the transactions  contemplated
hereby  (in the case of Subject Company) or the Parent Vote Matters (in the case
of Parent).

    8.2  EFFECT OF TERMINATION.  In  the event of termination of this  Agreement
by  either Parent or Subject Company as  provided in Section 8.1, this Agreement
shall forthwith become  void and  have no effect,  and none  of Parent,  Subject
Company,  any  of  their  respective  Subsidiaries or  any  of  the  officers or
directors of  any of  them shall  have any  liability of  any nature  whatsoever
hereunder,  or in connection  with the transactions  contemplated hereby, except
(i) Sections  6.2(b),  8.2,  and  9.3 shall  survive  any  termination  of  this
Agreement,  and (ii) notwithstanding anything to  the contrary contained in this
Agreement, neither Parent nor Subject Company shall be relieved or released from
any liabilities or damages arising out of its willful breach of any provision of
this Agreement.

    8.3  AMENDMENT.  Subject to  compliance with applicable law, this  Agreement
may  be amended by  the parties hereto,  by action taken  or authorized by their
respective Boards of  Directors, at  any time before  or after  approval of  the
matters  presented in connection with the  Merger by the stockholders of Subject
Company  and  Parent;  PROVIDED,  HOWEVER,  that  after  any  approval  of   the
transactions  contemplated by this Agreement  by Subject Company's stockholders,
there may not be, without further  approval of such stockholders, any  amendment
of  this  Agreement  which  reduces  the  amount  or  changes  the  form  of the
consideration to  be delivered  to the  Subject Company  stockholders  hereunder
other  than as contemplated by this Agreement. This Agreement may not be amended
except by an  instrument in  writing signed  on behalf  of each  of the  parties
hereto.

                                      A-34
<PAGE>
    8.4    EXTENSION; WAIVER.   At  any time  prior to  the Effective  Time, the
parties hereto,  by action  taken or  authorized by  their respective  Board  of
Directors,  may, to  the extent  legally allowed,  (a) extend  the time  for the
performance of any of the obligations or other acts of the other parties hereto,
(b) waive  any  inaccuracies in  the  representations and  warranties  contained
herein  or in  any document delivered  pursuant hereto and  (c) 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, but  such
extension  or  waiver  or  failure  to  insist  on  strict  compliance  with  an
obligation, covenant, agreement or condition shall  not operate as a waiver  of,
or estoppel with respect to, any subsequent or other failure.

                                  ARTICLE IX.
                               GENERAL PROVISIONS

    9.1   CLOSING.  Subject  to the terms and  conditions of this Agreement, the
closing of the Merger (the "Closing") will take place at 10:00 a.m. on a date to
be specified by  the parties, which  shall be  no later than  two business  days
after  the satisfaction or waiver  (subject to applicable law)  of the latest to
occur of the conditions set forth in Article VII hereof (the "Closing Date").

    9.2  NONSURVIVAL OF REPRESENTATIONS, WARRANTIES AND AGREEMENTS.  None of the
representations, warranties, covenants  and agreements in  this Agreement or  in
any  instrument  delivered pursuant  to this  Agreement  (other than  the Option
Agreements and the Fee Letters, for which provision has been made therein) shall
survive the Effective Time, except for those covenants and agreements  contained
herein  and therein  which by their  terms apply in  whole or in  part after the
Effective Time.

    9.3   EXPENSES.   Except  as provided  in the  Fee  Letters and  the  Option
Agreements,  all costs and  expenses incurred in  connection with this Agreement
and the transactions contemplated  hereby shall be paid  by the party  incurring
such expense, PROVIDED, HOWEVER, that (i) the costs and expenses of printing and
mailing the Joint Proxy Statement, and all filing and other fees paid to the SEC
in  connection with  the Merger,  shall be borne  equally by  Parent and Subject
Company and  (ii) notwithstanding  anything to  the contrary  contained in  this
Agreement, neither Parent nor Subject Company shall be relieved or released from
any liabilities or damages arising out of its willful breach of any provision of
this Agreement.

    9.4   NOTICES.  All  notices and other communications  hereunder shall be in
writing and  shall be  deemed given  if delivered  personally, telecopied  (with
confirmation), mailed by registered or certified mail (return receipt requested)
or  delivered by an  express courier (with  confirmation) to the  parties at the
following addresses (or at such other address for a party as shall be  specified
by like notice):

        (a) if to Parent, to:

            First Bank System, Inc.
           First Bank Place
           601 Second Avenue South
           Minneapolis, Minnesota 55402-4302
           Fax: (612) 973-0431
           Attn: Lee R. Mitau, Esq.

            with a copy to each of:

            Cleary, Gottlieb, Steen & Hamilton
           One Liberty Plaza
           New York, New York 10006
           Fax: (212) 225-3999
           Attn: Victor I. Lewkow, Esq.

            and

                                      A-35
<PAGE>
            Dorsey & Whitney P.L.L.P.
           220 South 6th Street
           Minneapolis, Minnesota 55402
           Fax: (612) 340-8738
           Attn: Jay L. Swanson, Esq.

        (b) if to Subject Company, to:

            First Interstate Bancorp
           633 West Fifth Street, TC 2-10
           Los Angeles, California 90071
           Fax: (213) 614-3741
           Attn: General Counsel

            with a copy to:

            Skadden, Arps, Slate, Meagher & Flom
           919 Third Avenue
           New York, New York 10022
           Fax: (212) 735-2000
           Attn: Fred B. White, III, Esq.

    9.5    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." Whenever the  word "material"  is used  in this  Agreement and  the
context  in which it is used  refers to any of the  parties to this Agreement or
any of their respective Subsidiaries, it shall  be deemed to be followed by  "to
[Subject  Company] [Parent] and its Subsidiaries, taken together as a whole," as
applicable. No provision of this Agreement shall be construed to require Subject
Company, Parent or any  of their respective Subsidiaries  or affiliates to  take
any  action which  would violate  or conflict  with any  applicable law (whether
statutory or common), rule or regulation.

    9.6  COUNTERPARTS.  This Agreement  may be executed in counterparts, all  of
which  shall be considered one and the same agreement and shall become effective
when 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.

    9.7  ENTIRE AGREEMENT.  This Agreement (together with the documents and  the
instruments  referred to herein) 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,  the  Subject  Company  Documents  and  the   Parent
Documents.

    9.8   GOVERNING  LAW.   This Agreement  shall be  governed and  construed in
accordance with  the  laws of  the  State of  Delaware,  without regard  to  any
applicable conflicts of law.

    9.9  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  without
rendering  invalid or unenforceable  the remaining terms  and provisions of this
Agreement or affecting  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.

    9.10   PUBLICITY.   Except  as otherwise required  by applicable  law or the
rules of the NYSE, neither Parent nor Subject Company shall, or shall permit any
of its Subsidiaries to, issue or cause  the publication of any press release  or
other   public   announcement   with   respect  to,   or   otherwise   make  any

                                      A-36
<PAGE>
public statement concerning,  the transactions contemplated  by this  Agreement,
the Option Agreements or the Fee Letters without the consent of the other party,
which consent shall not be unreasonably withheld.

    9.11  ASSIGNMENT; THIRD PARTY BENEFICIARIES.  Neither this Agreement nor any
of the rights, interests or obligations of any party 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 party. 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 assigns. Except as otherwise
specifically provided  in  Section 6.8  hereof,  this Agreement  (including  the
documents and instruments referred to herein) is not intended to confer upon any
person other than the parties hereto any rights or remedies hereunder.

    9.12    ALTERNATIVE STRUCTURE.    Notwithstanding anything  to  the contrary
contained in  this Agreement,  prior  to the  Effective  Time, the  parties  may
mutually  agree to revise  the structure of the  Merger and related transactions
provided that each of the  transactions comprising such revised structure  shall
(i)  not  change the  amount  or form  of consideration  to  be received  by the
stockholders of Subject Company and the holders of Subject Company Options, (ii)
be capable of consummation in as  timely a manner as the structure  contemplated
herein  and  (iii)  not  otherwise  be  prejudicial  to  the  interests  of  the
stockholders of Subject Company. This Agreement and any related documents  shall
be appropriately amended in order to reflect any such revised structure.

    9.13    ENFORCEMENT  OF  THE  AGREEMENT.    The  parties  hereto  agree that
irreparable damage would occur in the event  that any of the provisions of  this
Agreement  were not  performed in accordance  with their specific  terms or were
otherwise breached. It is accordingly agreed that the parties shall be  entitled
to  an injunction or  injunctions to prevent  breaches of this  Agreement and to
enforce specifically the terms and provisions hereof in any court of the  United
States  or any state  having jurisdiction, this  being in addition  to any other
remedy to which they are entitled at law or in equity.

                                      A-37
<PAGE>
    IN WITNESS WHEREOF, Parent and Subject Company have caused this Agreement to
be executed by  their respective officers  thereunto duly authorized  as of  the
date first above written.

                                          FIRST BANK SYSTEM, INC.

                                          By:  /S/ JOHN F. GRUNDHOFER
                                             -----------------------------------
                                              Name: John F. Grundhofer
                                              Title: Chairman, President and
                                                   Chief Executive Officer

                                          ELEVEN ACQUISITION CORP.

                                          By:  /S/ JOHN F. GRUNDHOFER
                                             -----------------------------------
                                              Name: John F. Grundhofer
                                              Title: Chairman, President and
                                                   Chief Executive Officer

                                          FIRST INTERSTATE BANCORP

                                          By:  /S/ WILLIAM E. B. SIART
                                             -----------------------------------
                                              Name: William E. B. Siart
                                              Title: Chairman and
                                                   Chief Executive Officer

                                      A-38
<PAGE>
                                                                      APPENDIX B

                             STOCK OPTION AGREEMENT

    STOCK  OPTION AGREEMENT,  dated November  5, 1995,  between FIRST INTERSTATE
BANCORP, a  Delaware corporation  ("Grantee"), and  FIRST BANK  SYSTEM, INC.,  a
Delaware corporation ("Issuer").

                              W I T N E S S E T H:

    WHEREAS,  Grantee  and Issuer  have entered  into an  Agreement and  Plan of
Merger immediately  prior to  the  execution and  delivery hereof  (the  "Merger
Agreement"); and

    WHEREAS,  as  a  condition  and  inducement  to  Grantee's  pursuit  of  the
transactions contemplated by the Merger Agreement and in consideration  therefor
and  in  consideration of  the grant  of the  Reciprocal Option  (as hereinafter
defined), Issuer  has  agreed  to  grant  Grantee  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) Issuer  hereby grants to  Grantee an unconditional, irrevocable
    option (the  "Option") to  purchase,  subject to  the  terms hereof,  up  to
    25,829,983  fully paid and  nonassessable shares of  the common stock, $1.25
    par value, of Issuer ("Common Stock") at a price per share equal to the last
    reported  sale  price  per  share  of  Common  Stock  as  reported  on   the
    consolidated  tape for New  York Stock Exchange issues  on November 3, 1995;
    provided, however, that in  the event Issuer issues  or agrees to issue  any
    shares  of Common Stock at  a price less than  such last reported sale price
    per share (as adjusted pursuant to  subsection (b) of Section 5) other  than
    as  permitted by  the Merger  Agreement, 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 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 of this Agreement (other than
    pursuant to this Agreement and other than pursuant to an event described  in
    Section  5(a) hereof), the number  of shares of Common  Stock subject to the
    Option shall be increased so that, after such issuance, such number together
    with any shares of  Common Stock previously  issued pursuant hereto,  equals
    19.9%  of the number of  shares of Common Stock  then issued and outstanding
    without giving  effect to  any  shares subject  or  issued pursuant  to  the
    Option.  Nothing  contained  in  this  Section  1(b)  or  elsewhere  in this
    Agreement shall  be deemed  to authorize  Issuer or  Grantee to  breach  any
    provision of the Merger Agreement.

        (c)  Notwithstanding  anything else  to  the contrary  contained  in the
    Agreement, in no event shall  (i) the number of  shares of Common Stock  for
    which this Option is then exercisable, plus (ii) the number of Option Shares
    (as  hereinafter defined)  theretofore purchased  hereunder, plus  (iii) the
    number of  other  shares  of  Common  Stock of  which  the  Grantee  is  the
    Beneficial  Owner (as such term is defined  in the Rights Agreement dated as
    of December 21, 1988 (as amended  to date, the "Rights Agreement"),  between
    the  Issuer and  the Rights  Agent (as  such term  is defined  in the Rights
    Agreement)) exceed  19.9% of  the issued  and outstanding  shares of  Common
    Stock  (computed in accordance  with the procedures set  forth in the Rights
    Agreement) until  after such  time as  the Rights  Agreement is  amended  to
    provide that neither the execution of this Agreement or the Merger Agreement
    nor  the exercise  of the  Option shall  result in  the Grantee  becoming an

                                      B-1
<PAGE>
    Acquiring Person (as such term is defined in the Rights Agreement). Issuer's
    Board has duly authorized  such an amendment and  Issuer agrees promptly  to
    take  all steps necessary  to enter into  such an amendment  with the Rights
    Agent.

        2.  (a) The Holder (as hereinafter defined) may exercise the Option,  in
    whole  or  part, 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 the written notice of such exercise (as provided in subsection (e)
    of  this Section  2) within  6 months  following such  Subsequent Triggering
    Event (or  such  later  period as  provided  in  Section 10).  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;  (iii) the passage  of 18 months  (or such  longer
    period  as provided in Section 10) after termination of the Merger Agreement
    if such  termination is  concurrent with  or follows  the occurrence  of  an
    Initial  Triggering Event;  (iv) the date  on which the  shareholders of the
    Grantee shall  have  voted  and  failed to  adopt  and  approve  the  Merger
    Agreement and the Merger (unless (A) Issuer shall then be in material breach
    of  its covenants or agreements contained in  the Merger Agreement or (B) on
    or prior to such date, the shareholders of the Issuer shall have also  voted
    and  failed to  approve the  Parent Vote Matters  (as defined  in the Merger
    Agreement); or (v) the date on which the Reciprocal Option shall have become
    exercisable in accordance with its terms.  The term "Holder" shall mean  the
    holder  or holders of  the Option. Notwithstanding  anything to the contrary
    contained herein,  (i) the  Option may  not be  exercised at  any time  when
    Grantee  shall be in breach of any  of its covenants or agreements contained
    in the Merger Agreement such that  Issuer shall be entitled (without  regard
    to  any grace  period provided  therein) to  terminate the  Merger Agreement
    pursuant  to  Section   8.1(d)  thereof  and   (ii)  this  Agreement   shall
    automatically  terminate  upon the  termination of  the Merger  Agreement by
    Issuer pursuant  to Section  8.1(d) thereof  as a  result of  the breach  by
    Grantee of its covenants or agreements contained in the Merger Agreement.

    (b)   The term  "Initial Triggering Event"  shall mean any  of the following
    events or transactions occurring on or after the date hereof:

               (i) Issuer or  any of its  Subsidiaries (as hereinafter  defined)
           (each  an  "Issuer  Subsidiary"), without  having  received Grantee'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  "1934 Act"), and the rules and
           regulations thereunder) other than Grantee or any of its Subsidiaries
           (each a "Grantee  Subsidiary") or  the Board of  Directors of  Issuer
           shall  have recommended  that the  shareholders of  Issuer approve or
           accept any Acquisition Transaction other than as contemplated by  the
           Merger  Agreement or this Agreement.  For purposes of this Agreement,
           (a)  "Acquisition   Transaction"  shall   mean   (x)  a   merger   or
           consolidation,  or any  similar transaction, involving  Issuer or any
           Significant Subsidiary (as  defined in  Rule 1-02  of Regulation  S-X
           promulgated by the Securities and Exchange Commission (the "SEC")) of
           Issuer  (other than  mergers, consolidations  or similar transactions
           involving solely  Issuer  and/or  one  or  more  wholly-owned  Issuer
           Subsidiaries and other than a merger or consolidation as to which the
           common  shareholders of the  Issuer immediately prior  thereto in the
           aggregate own at least 70% of  the common stock of the publicly  held
           surviving or successor corporation immediately following consummation
           thereof),  (y)  a  purchase, lease  or  other acquisition  of  all or
           substantially all  of  the  assets  or  deposits  of  Issuer  or  any
           Significant  Subsidiary  of  Issuer,  or  (z)  a  purchase  or  other
           acquisition  (including  by  way  of  merger,  consolidation,   share

                                      B-2
<PAGE>
           exchange  or otherwise) of securities representing 10% or more of the
           voting power of Issuer or  any Significant Subsidiary of Issuer,  and
           (b) "Subsidiary" shall have the meaning set forth in Rule 12b-2 under
           the 1934 Act;

               (ii)  Any  person other  than Grantee  or any  Grantee Subsidiary
           shall have  acquired beneficial  ownership or  the right  to  acquire
           beneficial  ownership of  10% or  more of  the outstanding  shares of
           Common Stock (the  term "beneficial ownership"  for purposes of  this
           Agreement having the meaning assigned thereto in Section 13(d) of the
           1934 Act, and the rules and regulations thereunder);

              (iii)  The shareholders of the Issuer  shall have voted and failed
           to approve the Parent Vote Matters  at a meeting which has been  held
           for  that purpose or any adjournment or postponement thereof, or such
           meeting shall not have been held in violation of the Merger Agreement
           or shall  have been  cancelled  prior to  termination of  the  Merger
           Agreement  if, prior to (x) such meeting or (y) if such meeting shall
           not have been held or shall have been cancelled, such termination, it
           shall have been publicly announced that any person (other than Parent
           or any  of  its  Subsidiaries)  shall  have  made,  or  disclosed  an
           intention   to  make,  a   proposal  to  engage   in  an  Acquisition
           Transaction;

              (iv) Issuer's Board of Directors shall have withdrawn or  modified
           (or  publicly  announced its  intention  to withdraw  or  modify) its
           recommendation that  the shareholders  of Issuer  approve the  Parent
           Vote  Matters,  or Issuer  or any  Issuer Subsidiary,  without having
           received Grantee's  prior  written consent,  shall  have  authorized,
           recommended,   proposed  (or  publicly  announced  its  intention  to
           authorize, recommend  or  propose)  an  agreement  to  engage  in  an
           Acquisition  Transaction  with any  person  other than  Grantee  or a
           Grantee Subsidiary;

               (v) Any person other than Grantee or any Grantee Subsidiary shall
           have made a proposal  to Issuer or its  shareholders to engage in  an
           Acquisition  Transaction and  such proposal shall  have been publicly
           announced;

              (vi) Any such person shall have filed with the SEC a  registration
           statement  with  respect to  a  potential exchange  offer  that would
           constitute an Acquisition Transaction  (or filed a preliminary  proxy
           statement  with  the SEC  with  respect to  a  potential vote  by its
           shareholders to approve the issuance of shares to be offered in  such
           an exchange offer);

              (vii)  Issuer  shall  have  willfully  breached  any  covenant  or
           obligation contained  in  the  Merger Agreement  in  anticipation  of
           engaging  in an  Acquisition Transaction,  and following  such breach
           Grantee would be entitled to terminate the Merger Agreement  (whether
           immediately  or  after the  giving of  notice or  passage of  time or
           both); or

             (viii) Any person  other than  Grantee or  any Grantee  Subsidiary,
           other  than in  connection with  a transaction  to which  Grantee 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.

    (c)   The term "Subsequent Triggering Event" shall mean any of the following
events or transactions occurring after the date hereof:

               (i) The  acquisition by  any person  (other than  Grantee or  any
           Grantee  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%.

                                      B-3
<PAGE>
    (d)  The term "Reciprocal Option" shall mean the option granted pursuant  to
the  option agreement dated  the date hereof  between the Grantee,  as issuer of
such option, and the Issuer, as grantee of such option.

    (e)  Issuer shall  notify Grantee 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
Issuer  shall not  be a  condition to the  right of  the Holder  to exercise the
Option.

    (f)  In  the event  the Holder  is entitled to  and wishes  to exercise  the
Option, it shall send to Issuer 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 and date not  earlier
than  three business days nor  later than 60 business  days from the Notice Date
for the closing of  such purchase (the "Closing  Date"); provided 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, shall promptly notify  the
Issuer  of such filing, 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.

    (g)   At the  closing referred to in  subsection (f) of  this Section 2, the
Holder shall (i) pay to  Issuer 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  Issuer,
provided  that failure  or refusal  of Issuer to  designate such  a bank account
shall not preclude the  Holder from exercising the  Option and (ii) present  and
surrender this Agreement to the Issuer at its principal executive offices.

    (h)    At  such closing,  simultaneously  with the  delivery  of immediately
available funds as provided  in subsection (g) of  this Section 2, Issuer  shall
deliver  to the Holder a certificate  or 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.

    (i)   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
               Issuer  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 Issuer  and  will  be provided  to  the  holder
               hereof  without charge upon receipt by Issuer of a
               written request therefor."

    It  is  understood  and  agreed  that:  (i)  the  reference  to  the  resale
restrictions  of the Securities Act of 1933 (the "1933 Act") in the above legend
shall be removed by delivery of substitute certificate(s) without such reference
if the Holder shall have delivered to Issuer  a copy of a letter from the  staff
of  the  SEC,  or  an  opinion of  counsel,  in  form  and  substance reasonably
satisfactory to  Issuer, to  the effect  that such  legend is  not required  for
purposes of the 1933 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.

                                      B-4
<PAGE>
        (j)   Upon the giving  by the Holder to Issuer  of the written notice of
    exercise of the Option provided for  under subsection (f) of this Section  2
    and  the tender  of the applicable  purchase price  in immediately available
    funds, 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  Issuer  shall  then  be  closed  or  that  certificates
    representing  such  shares  of  Common  Stock  shall  not  then  be actually
    delivered to the  Holder. Issuer  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,  issue and  delivery of  stock
    certificates under this Section 2 in the name of the Holder or its assignee,
    transferee or designee.

        3.   Issuer agrees: (i)  that it shall at  all times maintain, free from
    preemptive rights, sufficient authorized but unissued or treasury shares  of
    Common  Stock  so  that  the  Option  may  be  exercised  without additional
    authorization of  Common Stock  after giving  effect to  all other  options,
    warrants,  convertible securities and other rights to purchase Common Stock;
    (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 Issuer; (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. Section 18a
    and regulations promulgated thereunder and (y) in the event, under the  Bank
    Holding  Company Act  of 1956,  as amended,  or any  state or  other federal
    banking law, prior approval of or notice to the Federal Reserve Board or  to
    any  state or  other federal  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 or other federal  regulatory authority as they
    may require) in order to permit the Holder to exercise the Option and Issuer
    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.

        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 the Issuer, 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 Agreements and related Options for which
    this Agreement  (and  the Option  granted  hereby) may  be  exchanged.  Upon
    receipt  by Issuer  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, Issuer 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  Issuer, 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 shall be subject  to adjustment from time to time  as
    provided in this Section 5.

        (a)  In  the event  of any  change in  Common Stock  by reason  of stock
    dividends, split-ups, mergers, recapitalizations, combinations,
    subdivisions, conversions, exchanges  of shares  or the like,  the type  and
    number  of shares of Common Stock  purchasable upon exercise hereof shall be
    appropriately adjusted and proper  provision shall be made  so that, in  the
    event  that  any additional  shares  of Common  Stock  are to  be  issued or
    otherwise become outstanding  as a  result of  any such  change (other  than
    pursuant   to  an  exercise  of  the   Option),  the  number  of  shares  of

                                      B-5
<PAGE>
    Common Stock that remain subject to  the Option shall be increased so  that,
    after  such issuance  and together  with shares  of Common  Stock previously
    issued pursuant to the exercise of the Option (as adjusted on account of any
    of the foregoing changes in the Common Stock), it equals 19.9% of the number
    of shares of Common Stock then issued and outstanding.

        (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, Issuer  shall, at  the request of
    Grantee delivered within  12 months  (or such  later period  as provided  in
    Section  10) of such Subsequent Triggering  Event (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 registration  statement under the 1933 Act covering
    any shares issued  and issuable pursuant  to this Option  and shall use  its
    reasonable  best  efforts to  cause  such registration  statement  to become
    effective  and  remain  current  in  order  to  permit  the  sale  or  other
    disposition  of  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  Grantee.  Issuer will  use  its  reasonable 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
    day such registration statement first becomes effective or such shorter time
    as may be reasonably necessary to  effect such sales or other  dispositions.
    Grantee  shall have the  right to demand two  such registrations. The Issuer
    shall bear the costs of such  registrations (including, but not limited  to,
    Issuer's  attorneys'  fees,  printing  costs  and  filing  fees,  except for
    underwriting discounts  or  commissions,  brokers' fees  and  the  fees  and
    disbursements   of  Grantee's   counsel  related   thereto).  The  foregoing
    notwithstanding, if, at the time of any request by Grantee for  registration
    of  Option Shares as provided above,  Issuer 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 Option Shares would interfere with the successful marketing
    of the shares of Common Stock offered by Issuer, the number of Option Shares
    otherwise  to be covered  in the registration  statement contemplated hereby
    may be reduced; 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  Issuer in the  aggregate; and provided  further,
    however,  that  if  such reduction  occurs,  then  the Issuer  shall  file a
    registration statement for the balance as promptly as practicable thereafter
    as to which no reduction  pursuant to this Section  6 shall be permitted  or
    occur  and  the  Holder  shall  thereafter  be  entitled  to  one additional
    registration. Each  such Holder  shall  provide all  information  reasonably
    requested  by Issuer for inclusion in any registration statement to be filed
    hereunder.  If  requested  by  any  such  Holder  in  connection  with  such
    registration,  Issuer  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  Issuer.
    Upon  receiving any  request under  this Section  6 from  any Holder, Issuer
    agrees to send  a copy thereof  to any other  person known to  Issuer 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. Notwithstanding  anything to the
    contrary contained herein, in no event  shall Issuer be obligated to  effect
    more than two registrations pursuant to this Section 8 by reason of the fact
    that  there shall be more  than one Holder as a  result of any assignment or
    division of this Agreement.

                                      B-6
<PAGE>
        7.  (a)  At any  time after  the occurrence  of a  Repurchase Event  (as
    defined  below) (i)  at the  request of  the Holder,  delivered prior  to an
    Exercise Termination Event (or such later period as provided in Section 10),
    Issuer shall repurchase the Option from  the Holder at a price (the  "Option
    Repurchase  Price") equal  to (x) 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 prior to an  Exercise Termination Event (or  such later period  as
    provided  in Section 10), Issuer 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 (x)  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 price per share of Common Stock at which a
    tender 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
    Issuer, (iii) the highest  closing price for shares  of Common Stock  within
    the  six-month period immediately preceding the date the Holder gives notice
    of the required repurchase of this Option  or the Owner gives notice of  the
    required  repurchase of Option  Shares, as the  case may be,  or (iv) in the
    event of a sale of all or substantially all of Issuer's assets or  deposits,
    the  sum of the net price paid in  such sale for such assets or deposits and
    the current market value of the remaining net assets of Issuer as determined
    by a nationally recognized investment banking firm selected by the Holder or
    the Owner, as the case may be, and reasonably acceptable to Issuer,  divided
    by the number of shares of Common Stock of Issuer 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,  and
    reasonably acceptable to Issuer.

        (b) The Holder and the Owner, as the case may be, may exercise its right
    to require Issuer to repurchase the Option and any Option Shares pursuant to
    this  Section 7 by surrendering for such purpose to Issuer, at its principal
    office, a  copy of  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  Issuer  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, Issuer 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 Issuer  is not then
    prohibited under applicable law and regulation from so delivering.

        (c) To the  extent that  Issuer 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, Issuer  shall immediately  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 Issuer is  no
    longer  so prohibited; provided,  however, that if Issuer  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  Issuer  hereby undertakes  to  use its
    reasonable  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 whether in whole or
    to the extent  of the  prohibition, whereupon,  in the  latter case,  Issuer
    shall  promptly (i) deliver to the  Holder and/or the Owner, as appropriate,
    that portion of  the Option Purchase  Price or the  Option Share  Repurchase
    Price  that Issuer is  not prohibited from delivering;  and (ii) deliver, as
    appropriate, either (A) to the Holder, a new Agreement evidencing the  right
    of   the   Holder   to   purchase   that   number   of   shares   of  Common

                                      B-7
<PAGE>
    Stock obtained by multiplying the number of shares of Common Stock for which
    the surrendered Agreement  was exercisable at  the time of  delivery of  the
    notice  of repurchase by  a fraction, the  numerator of which  is the Option
    Repurchase Price  less  the portion  thereof  theretofore delivered  to  the
    Holder  and the denominator of which is  the Option Repurchase Price, 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 Issuer 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.

        (d)  For purposes of this Section 7,  a Repurchase Event shall be deemed
    to have  occurred upon  the occurrence  of any  of the  following events  or
    transactions after the date hereof:

               (i)  the acquisition  by any  person (other  than Grantee  or any
           Grantee Subsidiary) of  beneficial ownership  of 50% or  more of  the
           then outstanding Common Stock; or

               (ii) the consummation of any Acquisition Transaction described in
           Section  2(b)(i) hereof,  except that  the percentage  referred to in
           clause (z) shall be 50%.

        8.  (a) In the event that prior to an Exercise Termination Event, Issuer
    shall enter into  an agreement  (i) to consolidate  with or  merge into  any
    person,  other than Grantee  or a Grantee  Subsidiary, and shall  not be the
    continuing or surviving corporation of such consolidation or merger, (ii) to
    permit any person, other than Grantee or a Grantee Subsidiary, to merge into
    Issuer and Issuer 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  or  any
    Significant Subsidiary's  assets  or  deposits to  any  person,  other  than
    Grantee  or a Grantee Subsidiary, 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:

               (i)  "Acquiring  Corporation" shall  mean  (i) the  continuing or
           surviving corporation of  a consolidation or  merger with Issuer  (if
           other  than Issuer), (ii) Issuer  in a merger in  which Issuer is the
           continuing or surviving person,  and (iii) the  transferee of all  or
           substantially  all of Issuer's  assets or deposits  (or the assets or
           deposits of a Significant Subsidiary of Issuer).

               (ii) "Substitute Common Stock" shall mean the common stock issued
           by  the  issuer  of  the  Substitute  Option  upon  exercise  of  the
           Substitute Option.

              (iii)  "Assigned  Value"  shall mean  the  market/offer  price, as
           defined in Section 7.

              (iv) "Average Price"  shall mean  the average closing  price of  a
           share  of  the  Substitute  Common  Stock  for  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 day preceding such consolidation, merger or sale;
           provided that if Issuer 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  Issuer or  by any  company
           which  controls or  is controlled by  such person, as  the Holder may
           elect.

                                      B-8
<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  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 Issuer") 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)  Issuer 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
    Issuer hereunder.

        9.  (a)  At the  request of  the holder  of the  Substitute Option  (the
    "Substitute  Option  Holder"),  the  issuer of  the  Substitute  Option (the
    "Substitute Option Issuer") shall repurchase the Substitute Option from  the
    Substitute  Option  Holder at  a  price (the  "Substitute  Option Repurchase
    Price") equal to (x) 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  plus  (y) Grantee's
    Out-of-Pocket Expenses (to the extent not previously reimbursed), and at the
    request of the owner (the "Substitute Share Owner") of shares of  Substitute
    Common  Stock (the "Substitute Shares"),  the Substitute Option Issuer shall
    repurchase  the  Substitute  Shares  at  a  price  (the  "Substitute   Share
    Repurchase  Price") equal to (x) the Highest Closing Price multiplied by the
    number of Substitute Shares so  designated plus (y) Grantee's  Out-of-Pocket
    Expenses  (to  the  extent  not previously  reimbursed).  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 Issuer to repurchase the Substitute Option and the Substitute  Shares
    pursuant  to  this  Section  9  by  surrendering  for  such  purpose  to the
    Substitute Option Issuer, 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 Issuer  to repurchase  the Substitute  Option and/or  the  Substitute
    Shares in accordance with the provisions

                                      B-9
<PAGE>
    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 Issuer 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
    Issuer  is not then  prohibited under applicable law  and regulation from so
    delivering.

        (c) To the extent that the Substitute Option Issuer 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  Issuer 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 Share  Repurchase Price,  respectively,  which it  is no
    longer prohibited from delivering, within five business days after the  date
    on  which the Substitute Option Issuer is no longer so prohibited; provided,
    however, that if the Substitute Option Issuer 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 Issuer 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
    prohibition, whereupon, in  the latter  case, the  Substitute Option  Issuer
    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  Issuer  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 Issuer
    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, 6-month,  12-month or 18-month  periods for exercise  of
    certain  rights under Sections 2,  6, 7, 9 and 12  shall be extended: (i) to
    the extent necessary to obtain all regulatory approvals for the exercise  of
    such  rights (for  so long  as the  Holder is  using commercially reasonable
    efforts to obtain such regulatory approvals), and for the expiration of  all
    statutory  waiting  periods;  and  (ii) to  the  extent  necessary  to avoid
    liability under Section 16(b) of the 1934 Act by reason of such exercise.

        11. Issuer hereby represents and warrants to Grantee as follows:

        (a) Issuer has full corporate power and authority to execute and deliver
    this Agreement and 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

                                      B-10
<PAGE>
    authorized  by  the Board  of  Directors of  Issuer  and no  other corporate
    proceedings on the part of Issuer are necessary to authorize this  Agreement
    or  to consummate the transactions so  contemplated. This Agreement has been
    duly and validly executed and delivered by Issuer.

        (b) Issuer 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  thereto, 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.

        12. Neither  of the  parties hereto  may  assign any  of its  rights  or
    obligations  under this  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, Grantee, subject  to the express  provisions
    hereof,  may assign in whole or in part its rights and obligations hereunder
    within 12 months following such  Subsequent Triggering Event (or such  later
    period as provided in Section 10); provided, however, that until the date 30
    days  following the  date on  which the  Federal Reserve  Board has approved
    applications by Grantee to acquire the shares of Common Stock subject to the
    Option, Grantee 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 Issuer, (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 Grantee's behalf, or (iv)  any other manner approved by the
    Federal Reserve Board.

        13. Each of Grantee  and Issuer 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  applying to  the Federal
    Reserve Board under the Bank Holding Company Act for approval to acquire the
    shares issuable hereunder, but  Grantee 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.

        14. (a) Notwithstanding  any other  provision of this  Agreement, in  no
    event  shall the Grantee's Total Profit (as hereinafter defined) exceed $100
    million and, if it otherwise would  exceed such amount, the Grantee, at  its
    sole  election, shall either (a) reduce the number of shares of Common Stock
    subject to this Option,  (b) deliver to the  Issuer for cancellation  Option
    Shares  previously purchased by Grantee, (c) pay  cash to the Issuer, or (d)
    any combination thereof,  so that Grantee's  actually realized Total  Profit
    shall  not  exceed  $100 million  after  taking into  account  the foregoing
    actions.

        (b) Notwithstanding any other provision  of this Agreement, this  Option
    may  not be exercised  for a number  of shares as  would, as of  the date of
    exercise, result in a Notional Total Profit (as defined below) of more  than
    $100  million; PROVIDED,  that nothing in  this sentence  shall restrict any
    exercise of the Option permitted hereby on any subsequent date.

        (c) As used  herein, the term  "Total Profit" shall  mean the  aggregate
    amount  (before taxes) of the following:  (i) the amount received by Grantee
    pursuant to  Issuer's repurchase  of  the Option  (or any  portion  thereof)
    pursuant  to Section 7, (ii) (x) the  amount received by Grantee pursuant to
    Issuer's repurchase of  Option Shares pursuant  to Section 7,  less (y)  the
    Grantee's  purchase price  for such  Option Shares,  (iii) (x)  the net cash
    amounts received by Grantee pursuant to the sale of

                                      B-11
<PAGE>
    Option Shares (or  any other securities  into which such  Option Shares  are
    converted  or exchanged) to  any unaffiliated party,  less (y) the Grantee's
    purchase price of such Option Shares,  (iv) any amounts received by  Grantee
    on  the transfer of the Option (or  any portion thereof) to any unaffiliated
    party, and (v) any equivalent amount with respect to the Substitute Option.

        (d) As used herein, the term "Notional Total Profit" with respect to any
    number of shares  as to which  Grantee may propose  to exercise this  Option
    shall  be  the Total  Profit  determined as  of  the date  of  such proposed
    exercise assuming that  this Option  were exercised  on such  date for  such
    number  of shares  and assuming  that such  shares, together  with all other
    Option Shares held by Grantee and its affiliates as of such date, were  sold
    for cash at the closing market price for the Common Stock as of the close of
    business   on   the  preceding   trading   day  (less   customary  brokerage
    commissions).

        (e) The Grantee agrees,  promptly following any exercise  of all or  any
    portion  of the Option, and subject to its rights under Section 7 hereof, to
    use commercially reasonable efforts promptly to maximize the value of Option
    Shares purchased taking into account market conditions, the number of Option
    Shares, the potential  negative impact  of substantial sales  on the  market
    price  for  Issuer  Common  Stock,  and  the  availability  of  an effective
    registration statement to permit public sale of Option Shares.

        15. 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.

        16.  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 is not permitted to acquire, or
    Issuer is not permitted to repurchase pursuant to Section 7, the full number
    of  shares  of Common  Stock provided  in Section  1(a) hereof  (as adjusted
    pursuant to Section 1(b) or 5 hereof), it is the express intention of Issuer
    to allow  the Holder  to acquire  or to  require Issuer  to repurchase  such
    lesser  number of  shares as  may be  permissible, without  any amendment or
    modification hereof.

        17. All  notices, requests,  claims,  demands and  other  communications
    hereunder  shall be deemed to have been duly given when delivered in person,
    by fax,  telecopy, or  by  registered or  certified mail  (postage  prepaid,
    return  receipt requested)  at the respective  addresses of  the parties set
    forth in the Merger Agreement.

        18. This Agreement shall be governed by and construed in accordance with
    the laws  of  the State  of  Delaware, regardless  of  the laws  that  might
    otherwise govern under applicable principles of conflicts of laws thereof.

        19.  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.

        20.  Except as otherwise expressly provided  herein, 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.

        21. Except  as otherwise  expressly  provided herein  or in  the  Merger
    Agreement,  this Agreement contain 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 assignees. Nothing

                                      B-12
<PAGE>
    in  this Agreement,  expressed or  implied, is  intended to  confer upon any
    party, other than the parties hereto, and their respective successors except
    as assignees, any rights, remedies,  obligations or liabilities under or  by
    reason of this Agreement, except as expressly provided herein.

        22.  Capitalized terms  used in  this Agreement  and not  defined herein
    shall have the meanings assigned thereto in the Merger Agreement.

    IN WITNESS WHEREOF,  each of  the parties has  caused this  Agreement to  be
executed  on its behalf by its officers thereunto duly authorized, all as of the
date first above written.

                                          FIRST INTERSTATE BANCORP

                                          By /s/ WILLIAM E. B. SIART
                                            ------------------------------------
                                             Its Chairman and
                                             Chief Executive Officer

                                          FIRST BANK SYSTEM, INC.

                                          By /s/ JOHN F. GRUNDHOFER
                                            ------------------------------------
                                             Its Chairman, President and
                                             Chief Executive Officer

                                      B-13
<PAGE>
                                                                      APPENDIX C

                             STOCK OPTION AGREEMENT

    STOCK  OPTION AGREEMENT, dated November 5,  1995, between FIRST BANK SYSTEM,
INC., a  Delaware  corporation  ("Grantee"), and  FIRST  INTERSTATE  BANCORP,  a
Delaware corporation ("Issuer").

                              W I T N E S S E T H:

    WHEREAS,  Grantee  and Issuer  have entered  into an  Agreement and  Plan of
Merger immediately  prior to  the  execution and  delivery hereof  (the  "Merger
Agreement"); and

    WHEREAS,  as  a  condition  and  inducement  to  Grantee's  pursuit  of  the
transactions contemplated by the Merger Agreement and in consideration  therefor
and  in  consideration of  the grant  of the  Reciprocal Option  (as hereinafter
defined), Issuer  has  agreed  to  grant  Grantee  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) Issuer  hereby grants to  Grantee an unconditional, irrevocable
    option (the  "Option") to  purchase,  subject to  the  terms hereof,  up  to
    15,073,106  fully paid and  nonassessable shares of  the common stock, $2.00
    par value, of Issuer ("Common Stock") at a price per share equal to the last
    reported  sale  price  per  share  of  Common  Stock  as  reported  on   the
    consolidated  tape for New  York Stock Exchange issues  on November 3, 1995;
    provided, however, that in  the event Issuer issues  or agrees to issue  any
    shares  of Common Stock at  a price less than  such last reported sale price
    per share (as adjusted pursuant to  subsection (b) of Section 5) other  than
    as  permitted by  the Merger  Agreement, 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 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 of this Agreement (other than
    pursuant to this Agreement and other than pursuant to an event described  in
    Section  5(a) hereof), the number  of shares of Common  Stock subject to the
    Option shall be increased so that, after such issuance, such number together
    with any shares of  Common Stock previously  issued pursuant hereto,  equals
    19.9%  of the number of  shares of Common Stock  then issued and outstanding
    without giving  effect to  any  shares subject  or  issued pursuant  to  the
    Option.  Nothing  contained  in  this  Section  1(b)  or  elsewhere  in this
    Agreement shall  be deemed  to authorize  Issuer or  Grantee to  breach  any
    provision of the Merger Agreement.

        2.   (a) The Holder (as hereinafter defined) may exercise the Option, in
    whole or  part,  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 the written notice of such exercise (as provided in subsection (e)
    of this  Section 2)  within 6  months following  such Subsequent  Triggering
    Event  (or  such  later period  as  provided  in Section  10).  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;  (iii) the passage  of 18 months  (or such longer
    period as provided in Section 10) after termination of the Merger  Agreement
    if  such  termination is  concurrent with  or follows  the occurrence  of an
    Initial Triggering Event;  (iv) the date  on which the  shareholders of  the
    Grantee shall have voted and failed to

                                      C-1
<PAGE>
    approve the Parent Vote Matters (as defined in the Merger Agreement) (unless
    (A)  Issuer shall then be in material  breach of its covenants or agreements
    contained in the  Merger Agreement  or (B)  on or  prior to  such date,  the
    shareholders  of the Issuer shall have also  voted and failed to approve and
    adopt the Merger Agreement  and the Merger);  or (v) the  date on which  the
    Reciprocal  Option  shall have  become  exercisable in  accordance  with its
    terms. The term  "Holder" shall mean  the holder or  holders of the  Option.
    Notwithstanding  anything to the  contrary contained herein,  (i) the Option
    may not be exercised at any time when  Grantee shall be in breach of any  of
    its  covenants or  agreements contained  in the  Merger Agreement  such that
    Issuer shall  be  entitled (without  regard  to any  grace  period  provided
    therein)  to  terminate  the  Merger Agreement  pursuant  to  Section 8.1(d)
    thereof and  (ii)  this Agreement  shall  automatically terminate  upon  the
    termination  of the  Merger Agreement by  Issuer pursuant  to Section 8.1(d)
    thereof as a result of the breach by Grantee of its covenants or  agreements
    contained in the Merger Agreement.

        (b)  The term "Initial Triggering Event" shall mean any of the following
    events or transactions occurring on or after the date hereof:

               (i) Issuer or  any of its  Subsidiaries (as hereinafter  defined)
           (each  an  "Issuer  Subsidiary"), without  having  received Grantee'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  "1934 Act"), and the rules and
           regulations thereunder) other than Grantee or any of its Subsidiaries
           (each a "Grantee  Subsidiary") or  the Board of  Directors of  Issuer
           shall  have recommended  that the  shareholders of  Issuer approve or
           accept any Acquisition Transaction other than as contemplated by  the
           Merger  Agreement or this Agreement.  For purposes of this Agreement,
           (a)  "Acquisition   Transaction"  shall   mean   (x)  a   merger   or
           consolidation,  or any  similar transaction, involving  Issuer or any
           Significant Subsidiary (as  defined in  Rule 1-02  of Regulation  S-X
           promulgated by the Securities and Exchange Commission (the "SEC")) of
           Issuer  (other than  mergers, consolidations  or similar transactions
           involving solely  Issuer  and/or  one  or  more  wholly-owned  Issuer
           Subsidiaries and other than a merger or consolidation as to which the
           common  shareholders of the  Issuer immediately prior  thereto in the
           aggregate own at least 70% of  the common stock of the publicly  held
           surviving or successor corporation immediately following consummation
           thereof),  (y)  a  purchase, lease  or  other acquisition  of  all or
           substantially all  of  the  assets  or  deposits  of  Issuer  or  any
           Significant  Subsidiary  of  Issuer,  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 Issuer or  any Significant Subsidiary of Issuer,  and
           (b) "Subsidiary" shall have the meaning set forth in Rule 12b-2 under
           the 1934 Act;

               (ii)  Any  person other  than Grantee  or any  Grantee Subsidiary
           shall have  acquired beneficial  ownership or  the right  to  acquire
           beneficial  ownership of  10% or  more of  the outstanding  shares of
           Common Stock (the  term "beneficial ownership"  for purposes of  this
           Agreement having the meaning assigned thereto in Section 13(d) of the
           1934 Act, and the rules and regulations thereunder);

              (iii)  The shareholders of the Issuer  shall have voted and failed
           to approve the transactions contemplated by the Merger Agreement at a
           meeting which has been  held for that purpose  or any adjournment  or
           postponement  thereof, or  such meeting shall  not have  been held in
           violation of the Merger Agreement or shall have been cancelled  prior
           to  termination of the Merger Agreement if, prior to (x) such meeting
           or (y) if such meeting  shall not have been  held or shall have  been
           cancelled,  such termination,  it shall have  been publicly announced
           that any person (other than Parent or any of its Subsidiaries)  shall
           have made, or disclosed an intention to make, a proposal to engage in
           an Acquisition Transaction;

                                      C-2
<PAGE>
              (iv)  Issuer's Board of Directors shall have withdrawn or modified
           (or publicly  announced  its intention  to  withdraw or  modify)  its
           recommendation   that   the  shareholders   of  Issuer   approve  the
           transactions contemplated by the Merger  Agreement, or Issuer or  any
           Issuer  Subsidiary, without  having received  Grantee's prior written
           consent, shall have  authorized, recommended,  proposed (or  publicly
           announced  its  intention  to  authorize,  recommend  or  propose) an
           agreement to engage  in an  Acquisition Transaction  with any  person
           other than Grantee or a Grantee Subsidiary;

               (v) Any person other than Grantee or any Grantee Subsidiary shall
           have  made a proposal to  Issuer or its shareholders  to engage in an
           Acquisition Transaction and  such proposal shall  have been  publicly
           announced;

              (vi)  Any such person shall have filed with the SEC a registration
           statement with  respect  to a  potential  exchange offer  that  would
           constitute  an Acquisition Transaction (or  filed a preliminary proxy
           statement with  the SEC  with  respect to  a  potential vote  by  its
           shareholders  to approve the issuance of shares to be offered in such
           an exchange offer);

              (vii)  Issuer  shall  have  willfully  breached  any  covenant  or
           obligation  contained  in  the Merger  Agreement  in  anticipation of
           engaging in  an Acquisition  Transaction, and  following such  breach
           Grantee  would be entitled to terminate the Merger Agreement (whether
           immediately or  after the  giving of  notice or  passage of  time  or
           both); or

             (viii)  Any person  other than  Grantee or  any Grantee Subsidiary,
           other than  in connection  with a  transaction to  which Grantee  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.

    Notwithstanding the foregoing, the proposal made prior to the date hereof by
Wells Fargo & Company ("Wells") to enter into a business combination with Issuer
shall be deemed,  for purposes of  this Agreement, to  constitute a proposal  to
engage in an Acquisition Transaction that has been publicly announced; PROVIDED,
HOWEVER,  that solely  for purposes of  the foregoing clause  (v), such proposal
shall not constitute a publicly announced  proposal to engage in an  Acquisition
Transaction  if  Wells  shall have  publicly  announced the  withdrawal  of such
proposal prior to the time Issuer mails to its stockholders a proxy statement in
connection with its stockholder meeting called  to approve and adopt the  Merger
Agreement.  Nothing  contained  in  the  proviso  to  the  immediately preceding
sentence shall imply that any proposal made by Wells after the date hereof  does
not  constitute a proposal to engage  in an Acquisition Transaction for purposes
of the foregoing clause (v).

    (c)  The term "Subsequent Triggering Event" shall mean any of the  following
events or transactions occurring after the date hereof:

               (i)  The acquisition  by any  person (other  than Grantee  or any
           Grantee 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)   The term "Reciprocal Option" shall mean the option granted pursuant to
the option agreement  dated the date  hereof between the  Grantee, as issuer  of
such option, and the Issuer, as grantee of such option.

    (e)   Issuer shall notify  Grantee 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
Issuer shall not  be a  condition to  the right of  the Holder  to exercise  the
Option.

                                      C-3
<PAGE>
    (f)   In  the event  the Holder is  entitled to  and wishes  to exercise the
Option, it shall send to Issuer 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 and date not earlier
than three business days nor  later than 60 business  days from the Notice  Date
for  the closing of such  purchase (the "Closing Date");  provided 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, shall promptly notify the
Issuer of such filing, 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.

    (g)  At the  closing referred to  in subsection (f) of  this Section 2,  the
Holder  shall (i) pay to  Issuer 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 Issuer,
provided that failure  or refusal  of Issuer to  designate such  a bank  account
shall  not preclude the Holder  from exercising the Option  and (ii) present and
surrender this Agreement to the Issuer at its principal executive offices.

    (h)   At  such closing,  simultaneously  with the  delivery  of  immediately
available  funds as provided in  subsection (g) of this  Section 2, Issuer shall
deliver to the Holder a certificate  or 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.

    (i)  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
               Issuer 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  Issuer  and  will be  provided  to  the holder
               hereof without charge upon receipt by Issuer of  a
               written request therefor."

    It  is  understood  and  agreed  that:  (i)  the  reference  to  the  resale
restrictions of the Securities Act of 1933 (the "1933 Act") in the above  legend
shall be removed by delivery of substitute certificate(s) without such reference
if  the Holder shall have delivered to Issuer  a copy of a letter from the staff
of the  SEC,  or  an  opinion  of counsel,  in  form  and  substance  reasonably
satisfactory  to Issuer,  to the  effect that  such legend  is not  required for
purposes of the 1933 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.

    (j)   Upon the  giving by  the Holder  to Issuer  of the  written notice  of
exercise  of the Option provided for under  subsection (f) of this Section 2 and
the tender of the applicable purchase price in immediately available funds,  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
Issuer

                                      C-4
<PAGE>
    shall then be closed or that certificates representing such shares of Common
    Stock  shall not then be actually delivered  to the Holder. Issuer 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,
    issue and delivery of stock certificates under this Section 2 in the name of
    the Holder or its assignee, transferee or designee.

        3.  Issuer agrees: (i)  that it shall at  all times maintain, free  from
    preemptive  rights, sufficient authorized but unissued or treasury shares of
    Common Stock  so  that  the  Option  may  be  exercised  without  additional
    authorization  of Common  Stock after  giving effect  to all  other options,
    warrants, convertible securities and other rights to purchase Common  Stock;
    (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 Issuer; (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. Section18a
    and regulations promulgated thereunder and (y) in the event, under the  Bank
    Holding  Company Act  of 1956,  as amended,  or any  state or  other federal
    banking law, prior approval of or notice to the Federal Reserve Board or  to
    any  state or  other federal  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 or other federal  regulatory authority as they
    may require) in order to permit the Holder to exercise the Option and Issuer
    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.

        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 the Issuer, 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 Agreements and related Options for which
    this Agreement  (and  the Option  granted  hereby) may  be  exchanged.  Upon
    receipt  by Issuer  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, Issuer 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  Issuer, 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 shall be subject  to adjustment from time to time  as
    provided in this Section 5.

        (a)  In  the event  of any  change in  Common Stock  by reason  of stock
    dividends, split-ups, mergers, recapitalizations, combinations,
    subdivisions, conversions, exchanges  of shares  or the like,  the type  and
    number  of shares of Common Stock  purchasable upon exercise hereof shall be
    appropriately adjusted and proper  provision shall be made  so that, in  the
    event  that  any additional  shares  of Common  Stock  are to  be  issued or
    otherwise become outstanding  as a  result of  any such  change (other  than
    pursuant to an exercise of the Option), the number of shares of Common Stock
    that  remain subject to  the Option shall  be increased so  that, after such
    issuance and together with shares of Common Stock previously issued pursuant
    to the  exercise  of the  Option  (as adjusted  on  account of  any  of  the
    foregoing  changes in the  Common Stock), it  equals 19.9% of  the number of
    shares of Common Stock then issued and outstanding.

                                      C-5
<PAGE>
        (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, Issuer  shall, at  the request of
    Grantee delivered within  12 months  (or such  later period  as provided  in
    Section  10) of such Subsequent Triggering  Event (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 registration  statement under the 1933 Act covering
    any shares issued  and issuable pursuant  to this Option  and shall use  its
    reasonable  best  efforts to  cause  such registration  statement  to become
    effective  and  remain  current  in  order  to  permit  the  sale  or  other
    disposition  of  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  Grantee.  Issuer will  use  its  reasonable 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
    day such registration statement first becomes effective or such shorter time
    as may be reasonably necessary to  effect such sales or other  dispositions.
    Grantee  shall have the  right to demand two  such registrations. The Issuer
    shall bear the costs of such  registrations (including, but not limited  to,
    Issuer's  attorneys'  fees,  printing  costs  and  filing  fees,  except for
    underwriting discounts  or  commissions,  brokers' fees  and  the  fees  and
    disbursements   of  Grantee's   counsel  related   thereto).  The  foregoing
    notwithstanding, if, at the time of any request by Grantee for  registration
    of  Option Shares as provided above,  Issuer 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 Option Shares would interfere with the successful marketing
    of the shares of Common Stock offered by Issuer, the number of Option Shares
    otherwise  to be covered  in the registration  statement contemplated hereby
    may be reduced; 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  Issuer in the  aggregate; and provided  further,
    however,  that  if  such reduction  occurs,  then  the Issuer  shall  file a
    registration statement for the balance as promptly as practicable thereafter
    as to which no reduction  pursuant to this Section  6 shall be permitted  or
    occur  and  the  Holder  shall  thereafter  be  entitled  to  one additional
    registration. Each  such Holder  shall  provide all  information  reasonably
    requested  by Issuer for inclusion in any registration statement to be filed
    hereunder.  If  requested  by  any  such  Holder  in  connection  with  such
    registration,  Issuer  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  Issuer.
    Upon  receiving any  request under  this Section  6 from  any Holder, Issuer
    agrees to send  a copy thereof  to any other  person known to  Issuer 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. Notwithstanding  anything to the
    contrary contained herein, in no event  shall Issuer be obligated to  effect
    more than two registrations pursuant to this Section 8 by reason of the fact
    that  there shall be more  than one Holder as a  result of any assignment or
    division of this Agreement.

        7.  (a)  At any  time after  the occurrence  of a  Repurchase Event  (as
    defined  below) (i)  at the  request of  the Holder,  delivered prior  to an
    Exercise Termination Event (or such later period as provided in Section 10),
    Issuer shall repurchase the Option from  the Holder at a price (the  "Option
    Repurchase  Price") equal  to (x) 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

                                      C-6
<PAGE>
    time (the "Owner"),  delivered prior  to an Exercise  Termination Event  (or
    such  later period as provided in  Section 10), Issuer 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 (x) 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 price per share  of
    Common  Stock at which  a tender 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 Issuer, (iii) the  highest closing price for
    shares of Common Stock within the six-month period immediately preceding the
    date the Holder gives  notice of the required  repurchase of this Option  or
    the  Owner gives notice of the required  repurchase of Option Shares, as the
    case may be, or (iv) in the event  of a sale of all or substantially all  of
    Issuer's  assets or deposits, the sum of the net price paid in such sale for
    such assets or deposits  and the current market  value of the remaining  net
    assets of Issuer as determined by a nationally recognized investment banking
    firm selected by the Holder or the Owner, as the case may be, and reasonably
    acceptable  to Issuer, divided  by the number  of shares of  Common Stock of
    Issuer 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, and reasonably acceptable to Issuer.

        (b) The Holder and the Owner, as the case may be, may exercise its right
    to require Issuer to repurchase the Option and any Option Shares pursuant to
    this Section 7 by surrendering for such purpose to Issuer, at its  principal
    office,  a  copy of  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  Issuer 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, Issuer 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 Issuer  is not  then
    prohibited under applicable law and regulation from so delivering.

        (c)  To the  extent that  Issuer 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, Issuer  shall immediately 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 Issuer is no
    longer so prohibited; provided,  however, that if Issuer  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  Issuer  hereby undertakes  to  use  its
    reasonable  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 whether in whole  or
    to  the extent  of the  prohibition, whereupon,  in the  latter case, Issuer
    shall promptly (i) deliver to the  Holder and/or the Owner, as  appropriate,
    that  portion of  the Option Purchase  Price or the  Option Share Repurchase
    Price that Issuer is  not prohibited from delivering;  and (ii) deliver,  as
    appropriate,  either (A) to the Holder, a new Agreement evidencing the right
    of the Holder to purchase that number of shares of Common Stock obtained  by
    multiplying  the number of shares of  Common Stock for which the surrendered
    Agreement was  exercisable  at  the  time  of  delivery  of  the  notice  of
    repurchase  by a fraction,  the numerator of which  is the Option Repurchase
    Price less the portion thereof theretofore  delivered to the Holder and  the
    denominator  of which is the Option Repurchase Price, 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 Issuer described in the

                                      C-7
<PAGE>
    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.

        (d) For purposes of this Section  7, a Repurchase Event shall be  deemed
    to  have occurred  upon the  occurrence of  any of  the following  events or
    transactions after the date hereof:

               (i) the  acquisition by  any person  (other than  Grantee or  any
           Grantee  Subsidiary) of  beneficial ownership of  50% or  more of the
           then outstanding Common Stock; or

               (ii) the consummation of any Acquisition Transaction described in
           Section 2(b)(i) hereof,  except that  the percentage  referred to  in
           clause (z) shall be 50%.

        8.  (a) In the event that prior to an Exercise Termination Event, Issuer
    shall  enter into  an agreement  (i) to consolidate  with or  merge into any
    person, other than  Grantee or a  Grantee Subsidiary, and  shall not be  the
    continuing or surviving corporation of such consolidation or merger, (ii) to
    permit any person, other than Grantee or a Grantee Subsidiary, to merge into
    Issuer  and Issuer 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  or  any
    Significant  Subsidiary's  assets  or  deposits to  any  person,  other than
    Grantee or a Grantee Subsidiary, 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:

               (i) "Acquiring  Corporation" shall  mean  (i) the  continuing  or
           surviving  corporation of a  consolidation or merger  with Issuer (if
           other than Issuer), (ii)  Issuer in a merger  in which Issuer is  the
           continuing  or surviving person,  and (iii) the  transferee of all or
           substantially all of Issuer's  assets or deposits  (or the assets  or
           deposits of a Significant Subsidiary of Issuer).

               (ii) "Substitute Common Stock" shall mean the common stock issued
           by  the  issuer  of  the  Substitute  Option  upon  exercise  of  the
           Substitute Option.

              (iii) "Assigned  Value"  shall  mean the  market/offer  price,  as
           defined in Section 7.

              (iv)  "Average Price"  shall mean the  average closing  price of a
           share of  the  Substitute  Common  Stock  for  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 day preceding such consolidation, merger or sale;
           provided  that if Issuer 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  Issuer or  by any company
           which controls or  is controlled by  such person, as  the Holder  may
           elect.

        (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.

                                      C-8
<PAGE>
        (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  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 Issuer") 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) Issuer 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
    Issuer hereunder.

        9.   (a)  At the  request of  the holder  of the  Substitute Option (the
    "Substitute Option  Holder"),  the  issuer of  the  Substitute  Option  (the
    "Substitute  Option Issuer") shall repurchase the Substitute Option from the
    Substitute Option  Holder  at a  price  (the "Substitute  Option  Repurchase
    Price")  equal to (x) 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  plus  (y)  Grantee's
    Out-of-Pocket Expenses (to the extent not previously reimbursed), and at the
    request  of the owner (the "Substitute Share Owner") of shares of Substitute
    Common Stock (the "Substitute Shares"),  the Substitute Option Issuer  shall
    repurchase   the  Substitute  Shares  at  a  price  (the  "Substitute  Share
    Repurchase Price") equal to (x) the Highest Closing Price multiplied by  the
    number  of Substitute Shares so  designated plus (y) Grantee's Out-of-Pocket
    Expenses (to  the  extent  not previously  reimbursed).  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  Issuer to repurchase the Substitute Option and the Substitute Shares
    pursuant to  this  Section  9  by  surrendering  for  such  purpose  to  the
    Substitute  Option Issuer, 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  Issuer  to repurchase  the Substitute  Option and/or  the Substitute
    Shares in accordance with the provisions  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 Issuer  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 Issuer  is not then  prohibited
    under applicable law and regulation from so delivering.

                                      C-9
<PAGE>
        (c)  To the extent that the Substitute Option Issuer 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  Issuer 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 Share  Repurchase  Price, respectively,  which it  is  no
    longer  prohibited from delivering, within five business days after the date
    on which the Substitute Option Issuer is no longer so prohibited;  provided,
    however,  that if the Substitute Option Issuer 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 Issuer 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
    prohibition,  whereupon, in  the latter  case, the  Substitute Option Issuer
    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  Issuer  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  Issuer
    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, 6-month,  12-month or 18-month  periods for exercise of
    certain rights under Sections 2,  6, 7, 9 and 12  shall be extended: (i)  to
    the  extent necessary to obtain all regulatory approvals for the exercise of
    such rights (for  so long  as the  Holder is  using commercially  reasonable
    efforts  to obtain such regulatory approvals), and for the expiration of all
    statutory waiting  periods;  and  (ii)  to the  extent  necessary  to  avoid
    liability under Section 16(b) of the 1934 Act by reason of such exercise.

        11. Issuer hereby represents and warrants to Grantee as follows:

        (a) Issuer has full corporate power and authority to execute and deliver
    this  Agreement and 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 Issuer  and no other corporate proceedings on  the
    part  of Issuer are  necessary to authorize this  Agreement or to consummate
    the transactions so contemplated. This  Agreement has been duly and  validly
    executed and delivered by Issuer.

        (b)  Issuer 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

                                      C-10
<PAGE>
    thereto, 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.

        12.  Neither  of the  parties hereto  may  assign any  of its  rights or
    obligations under  this 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,  Grantee, subject to  the express provisions
    hereof, may assign in whole or in part its rights and obligations  hereunder
    within  12 months following such Subsequent  Triggering Event (or such later
    period as provided in Section 10); provided, however, that until the date 30
    days following the  date on  which the  Federal Reserve  Board has  approved
    applications by Grantee to acquire the shares of Common Stock subject to the
    Option,  Grantee 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 Issuer, (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 Grantee's behalf, or (iv)  any other manner approved by  the
    Federal Reserve Board.

        13.  Each of Grantee  and Issuer 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  applying to  the  Federal
    Reserve Board under the Bank Holding Company Act for approval to acquire the
    shares  issuable hereunder, but  Grantee 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.

        14.  (a) Notwithstanding  any other provision  of this  Agreement, in no
    event shall the Grantee's Total Profit (as hereinafter defined) exceed  $100
    million  and, if it otherwise would exceed  such amount, the Grantee, at its
    sole election, shall either (a) reduce the number of shares of Common  Stock
    subject  to this Option,  (b) deliver to the  Issuer for cancellation Option
    Shares previously purchased by Grantee, (c)  pay cash to the Issuer, or  (d)
    any  combination thereof, so  that Grantee's actually  realized Total Profit
    shall not  exceed  $100 million  after  taking into  account  the  foregoing
    actions.

        (b)  Notwithstanding any other provision  of this Agreement, this Option
    may not be  exercised for a  number of shares  as would, as  of the date  of
    exercise,  result in a Notional Total Profit (as defined below) of more than
    $100 million; PROVIDED,  that nothing  in this sentence  shall restrict  any
    exercise of the Option permitted hereby on any subsequent date.

        (c)  As used  herein, the term  "Total Profit" shall  mean the aggregate
    amount (before taxes) of the following:  (i) the amount received by  Grantee
    pursuant  to  Issuer's repurchase  of the  Option  (or any  portion thereof)
    pursuant to Section 7, (ii) (x)  the amount received by Grantee pursuant  to
    Issuer's  repurchase of  Option Shares pursuant  to Section 7,  less (y) the
    Grantee's purchase price  for such  Option Shares,  (iii) (x)  the net  cash
    amounts  received by Grantee pursuant  to the sale of  Option Shares (or any
    other securities into which such  Option Shares are converted or  exchanged)
    to  any unaffiliated  party, less (y)  the Grantee's purchase  price of such
    Option Shares, (iv) any amounts received  by Grantee on the transfer of  the
    Option  (or  any portion  thereof) to  any unaffiliated  party, and  (v) any
    equivalent amount with respect to the Substitute Option.

        (d) As used herein, the term "Notional Total Profit" with respect to any
    number of shares  as to which  Grantee may propose  to exercise this  Option
    shall  be  the Total  Profit  determined as  of  the date  of  such proposed
    exercise assuming that  this Option  were exercised  on such  date for  such
    number  of shares  and assuming  that such  shares, together  with all other
    Option Shares held by Grantee and its affiliates as of such date, were  sold
    for cash at the closing market price for the Common Stock as of the close of
    business   on   the  preceding   trading   day  (less   customary  brokerage
    commissions).

                                      C-11
<PAGE>
        (e) The Grantee agrees,  promptly following any exercise  of all or  any
    portion  of the Option, and subject to its rights under Section 7 hereof, to
    use commercially reasonable efforts promptly to maximize the value of Option
    Shares purchased taking into account market conditions, the number of Option
    Shares, the potential  negative impact  of substantial sales  on the  market
    price  for  Issuer  Common  Stock,  and  the  availability  of  an effective
    registration statement to permit public sale of Option Shares.

        15. 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.

        16.  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 is not permitted to acquire, or
    Issuer is not permitted to repurchase pursuant to Section 7, the full number
    of  shares  of Common  Stock provided  in Section  1(a) hereof  (as adjusted
    pursuant to Section 1(b) or 5 hereof), it is the express intention of Issuer
    to allow  the Holder  to acquire  or to  require Issuer  to repurchase  such
    lesser  number of  shares as  may be  permissible, without  any amendment or
    modification hereof.

        17. All  notices, requests,  claims,  demands and  other  communications
    hereunder  shall be deemed to have been duly given when delivered in person,
    by fax,  telecopy, or  by  registered or  certified mail  (postage  prepaid,
    return  receipt requested)  at the respective  addresses of  the parties set
    forth in the Merger Agreement.

        18. This Agreement shall be governed by and construed in accordance with
    the laws  of  the State  of  Delaware, regardless  of  the laws  that  might
    otherwise govern under applicable principles of conflicts of laws thereof.

        19.  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.

        20.  Except as otherwise expressly provided  herein, 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.

        21. Except  as otherwise  expressly  provided herein  or in  the  Merger
    Agreement,  this Agreement contain 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  assignees. Nothing  in this  Agreement, expressed  or implied, is
    intended to confer upon any party, other than the parties hereto, and  their
    respective successors except as assignees, any rights, remedies, obligations
    or  liabilities under  or by reason  of this Agreement,  except as expressly
    provided herein.

        22. Capitalized  terms used  in this  Agreement and  not defined  herein
    shall have the meanings assigned thereto in the Merger Agreement.

                                      C-12
<PAGE>
    IN  WITNESS WHEREOF,  each of  the parties has  caused this  Agreement to be
executed on its behalf by its officers thereunto duly authorized, all as of  the
date first above written.

                                          FIRST BANK SYSTEM, INC.

                                          By  /S/ JOHN F. GRUNDHOFER
                                            ------------------------------------
                                             Its Chairman, President and
                                             Chief Executive Officer

                                          FIRST INTERSTATE BANCORP

                                          By  /S/ WILLIAM E. B. SIART
                                            ------------------------------------
                                             Its Chairman and
                                             Chief Executive Officer

                                      C-13
<PAGE>
                                                                      APPENDIX D
                            First Bank System, Inc.
                                First Bank Place
                            601 Second Avenue South
                       Minneapolis, Minnesota 55402-4302

                                November 5, 1995

First Interstate Bancorp
633 West Fifth Street
Los Angeles, California 90071

Attention:  William E.B. Siart
          Chairman, President and Chief Executive Officer

Ladies and Gentlemen:

    We  refer to the  Agreement and Plan  of Merger (the  "MERGER AGREEMENT") of
even date herewith  among First  Interstate Bancorp  ("SUBJECT COMPANY"),  First
Bank  System,  Inc.  ("PARENT")  and Eleven  Acquisition  Corp.  ("MERGER SUB").
Capitalized terms used but not defined  herein shall have the meanings  ascribed
to them in the Merger Agreement.

    In  order to induce Subject Company to  enter into the Merger Agreement, and
in consideration of Subject  Company's undertaking of  efforts in futherance  of
the transactions contemplated thereby, Parent agrees as follows:

    1.   REPRESENTATIONS AND WARRANTIES.   Parent hereby represents and warrants
to Subject Company that Parent has  all requisite corporate power and  authority
to  enter  into this  letter  agreement (this  "AGREEMENT")  and to  perform its
obligations set forth herein.  The execution, delivery  and performance of  this
Agreement  have  been duly  and validly  authorized  by all  necessary corporate
action on  the  part  of Parent.  This  Agreement  has been  duly  executed  and
delivered by Parent.

    2.  TERMINATION FEE.  (a) Unless a Nullifying Event (as such term is defined
below) shall have occurred and be continuing at the time the Merger Agreement is
terminated,  in the  event that the  Merger Agreement is  terminated pursuant to
Article VIII thereof  (regardless of whether  such termination is  by Parent  or
Subject  Company) and  prior to  or concurrently  with such  termination a First
Trigger Event (as such term is defined below) shall have occurred, Parent  shall
pay  to Subject Company a cash fee of  $25 million. Such fee shall be payable in
immediately available funds on or before the second business day following  such
termination of the Merger Agreement.

    (b)   In  addition, unless  a Nullifying  Event shall  have occurred  and be
continuing at the time the Merger Agreement is terminated, in the event that (i)
the Merger  Agreement  shall  have  been terminated  pursuant  to  Article  VIII
thereof,  (ii) prior  to or concurrently  with such termination  a First Trigger
Event shall have occurred,  and (iii) prior to,  concurrently with or within  18
months  after such  termination an  Acquisition Event  (as such  term is defined
below) shall have occurred,  Parent shall pay to  Subject Company an  additional
cash  fee of (i) $100  million, less (ii) any amount  paid by Parent pursuant to
Paragraph 2(a) hereof. Such fee shall be payable in immediately available  funds
on  or  before  the  second  business  day  following  the  occurrence  of  such
Acquisition Event.

    (c)  As used herein,  a "FIRST TRIGGER EVENT"  shall mean the occurrence  of
any of the following events:

           (i)  Parent's  Board of  Directors shall  have  failed to  approve or
       recommend the Parent Vote Matters, or shall have withdrawn or modified in
       a manner adverse to Subject Company its approval or recommendation of the
       Parent Vote  Matters, or  shall have  resolved or  publicly announced  an
       intention to do either of the foregoing;

                                      D-1
<PAGE>
           (ii)  Parent or any  Significant Subsidiary (as  such term is defined
       below), or the Board of Directors of Parent or a Significant  Subsidiary,
       shall  have  recommended  that  the stockholders  of  Parent  approve any
       Acquisition Proposal  (as  such term  is  defined below)  or  shall  have
       entered into an agreement with respect to, authorized, approved, proposed
       or  publicly  announced  its  intention to  enter  into,  any Acquisition
       Proposal;

          (iii) the  Parent Vote  Matters  shall not  have  been approved  at  a
       meeting of Parent stockholders which has been held for that purpose prior
       to  termination of the Merger Agreement  in accordance with its terms, if
       prior thereto  it shall  have  been publicly  announced that  any  person
       (other  than Subject Company or any of its Subsidiaries) shall have made,
       or disclosed an intention to make, an Acquisition Proposal;

          (iv) any person (together with its affiliates and associates) or group
       (as such terms  are used for  purposes of Section  13(d) of the  Exchange
       Act)  (other  than  Subject  Company  and  its  Subsidiaries)  shall have
       acquired beneficial  ownership (as  such  term is  used for  purposes  of
       Section  13(d) of  the Exchange Act)  or the right  to acquire beneficial
       ownership of 50% or more of the then outstanding shares of the stock then
       entitled to vote generally  in the election of  directors of Parent or  a
       Significant Subsidiary; or

           (v)  following the  making of  an Acquisition  Proposal, Parent shall
       have breached any covenant or agreement contained in the Merger Agreement
       such that  Subject Company  would  be entitled  to terminate  the  Merger
       Agreement  under  Section 8.1(d)  thereof  (without regard  to  any grace
       period provided for therein) unless such breach is promptly cured without
       jeopardizing consummation  of the  Merger pursuant  to the  terms of  the
       Merger Agreement.

    (d)   As used herein, "ACQUISITION EVENT" shall mean the consummation of any
event described in  the definition  of "Acquisition Proposal,"  except that  the
percentage  reference contained  in clause (C)  of such definition  shall be 50%
instead of 20%.

    (e)  As  used herein,  "ACQUISITION PROPOSAL"  shall mean  any (i)  publicly
announced  proposal, (ii) regulatory application or  notice (whether in draft or
final form), (iii) agreement or  understanding, (iv) disclosure of an  intention
to  make a proposal, or (v) amendment to  any of the foregoing, made or filed on
or after the  date hereof, in  each case with  respect to any  of the  following
transactions  with  a counterparty  other  than Subject  Company  or any  of its
Subsidiaries: (A)  a  merger  or  consolidation,  or  any  similar  transaction,
involving   Parent   or  any   Significant   Subsidiary  (other   than  mergers,
consolidations or similar  transactions involving  solely Parent  and/or one  or
more   wholly  owned  Subsidiaries  of  Parent   and  other  than  a  merger  or
consolidation as to which  the common shareholders  of Parent immediately  prior
thereto  in the aggregate own  at least 70% of the  common stock of the publicly
held surviving or successor  corporation (or any  publicly held ultimate  parent
company  thereof) immediately  following consummation thereof);  (B) a purchase,
lease or other acquisition of all or substantially all of the assets or deposits
of Parent or any Significant Subsidiary; or (C) a purchase or other  acquisition
(including  by way  of merger,  consolidation, share  exchange or  otherwise) of
securities representing  20%  or more  of  the voting  power  of Parent  or  any
Significant Subsidiary.

    (f)   As  used herein,  "NULLIFYING EVENT" shall  mean any  of the following
events occurring and continuing at a time when Parent is not in material  breach
of  any of its  covenants or agreements  contained in the  Merger Agreement: (i)
Subject Company  shall  be in  breach  of any  of  its covenants  or  agreements
contained  in  the  Merger  Agreement  such that  Parent  shall  be  entitled to
terminate the  Merger  Agreement pursuant  to  Section 8.1(d)  thereof  (without
regard  to  any grace  period provided  for therein),  (ii) the  stockholders of
Subject Company  shall have  voted and  failed to  approve the  adoption of  the
agreement of merger (within the meaning of section 251 of the DGCL) contained in
the  Merger Agreement at a meeting of  such stockholders which has been held for
that purpose or at  any adjournment or postponement  thereof (unless the  Parent
Vote  Matters shall not have  been approved at a  meeting of Parent stockholders
which was held on or prior to such  date for the purpose of voting with  respect
to  the Parent Vote Matters) or (iii)  the Board of Directors of Subject Company
shall have failed

                                      D-2
<PAGE>
to approve or  recommend that the  stockholders of Subject  Company approve  the
adoption  of the agreement of  merger (within the meaning  of section 251 of the
DGCL) contained in  the Merger Agreement  or shall have  withdrawn, modified  or
changed  in any manner adverse to Parent its approval or recommendation that the
stockholders of Subject Company approve the adoption of the agreement of  merger
(within  the  meaning  of section  251  of  the DGCL)  contained  in  the Merger
Agreement or shall have resolved or  publicly announced its intention to do  any
of the foregoing.

    (g)   As  used herein,  "SIGNIFICANT SUBSIDIARY"  shall mean  a "significant
subsidiary," as  defined in  Rule  1-02 of  Regulation  S-X promulgated  by  the
Securities and Exchange Commission, of Parent.

    3.  To the extent that Parent is prohibited by applicable law or regulation,
or  by  administrative  actions  or  policy  of  a  Federal  or  state financial
institution supervisory  agency having  jurisdiction over  it, from  making  the
payments  required to be paid by Parent  herein in full, it shall immediately so
notify Subject Company  and thereafter deliver  or cause to  be delivered,  from
time  to time, to  Subject Company, the  portion of the  payments required to be
paid by it  herein that  it is  no longer  prohibited from  paying, within  five
business  days  after the  date  on which  Parent  is no  longer  so prohibited;
PROVIDED, HOWEVER, that if Parent at any time is prohibited by applicable law or
regulation, or  by  administrative actions  or  policy  of a  Federal  or  state
financial  institution  supervisory  agency having  jurisdiction  over  it, from
making the payments required hereunder in full, it shall (i) use its  reasonable
best  efforts to obtain all required regulatory  and legal approvals and to file
any required notices as promptly as practicable in order to make such  payments,
(ii)  within five days of the submission or receipt of any documents relating to
any such regulatory and legal approvals, provide Subject Company with copies  of
the  same, and (iii) keep Subject Company advised of both the status of any such
request for regulatory and legal approvals, as well as any discussions with  any
relevant regulatory or other third party reasonably related to the same.

    4.   Except where federal law  specifically applies, this Agreement shall be
construed and interpreted according to the laws of the State of Delaware without
regard to conflicts of laws principles thereof.

    5.  This Agreement may  be executed in any  number of counterparts, each  of
which  shall be deemed an  original, but all of  which together shall constitute
one and the same instrument.

    6.  Nothing contained herein shall be deemed to authorize Subject Company or
Parent to breach any provision of the Merger Agreement.

    Please confirm your agreement  with the understandings  set forth herein  by
signing and returning to us the enclosed copy of this Agreement.

                                          Very truly yours,

                                          FIRST BANK SYSTEM, INC.

                                          By:  /S/ JOHN F. GRUNDHOFER
                                             -----------------------------------
                                              Name: John F. Grundhofer
                                              Title: Chairman, President and
                                                 Chief Executive Officer
Accepted and agreed to as of
the date first above written:

FIRST INTERSTATE BANCORP

By:  /S/ WILLIAM E.B. SIART
   -------------------------------------------
    Name: William E.B. Siart
    Title: Chairman and Chief
        Executive Officer

                                      D-3
<PAGE>
                                                                      APPENDIX E
                            First Interstate Bancorp
                             633 West Fifth Street
                         Los Angeles, California 90071
                                November 5, 1995
First Bank System, Inc.
First Bank Place
601 Second Avenue South
Minneapolis, Minnesota 55402-4302

Attention:  John F. Grundhofer
          Chairman, President and Chief Executive Officer

Ladies and Gentlemen:

    We  refer to the  Agreement and Plan  of Merger (the  "MERGER AGREEMENT") of
even date herewith  among First  Interstate Bancorp  ("SUBJECT COMPANY"),  First
Bank  System,  Inc.  ("Parent")  and Eleven  Acquisition  Corp.  ("MERGER SUB").
Capitalized terms used but not defined  herein shall have the meanings  ascribed
to them in the Merger Agreement.

    In order to induce Parent and Merger Sub to enter into the Merger Agreement,
and  in consideration of  Parent's undertaking of efforts  in furtherance of the
transactions contemplated thereby, Subject Company agrees as follows:

    1.  REPRESENTATIONS AND WARRANTIES.   Subject Company hereby represents  and
warrants  to Parent that  Subject Company has all  requisite corporate power and
authority to enter into this letter agreement (this "AGREEMENT") and to  perform
its  obligations set  forth herein. The  execution, delivery  and performance of
this Agreement have been duly and validly authorized by all necessary  corporate
action on the part of Subject Company. This Agreement has been duly executed and
delivered by Subject Company.

    2.  TERMINATION FEE.  (a) Unless a Nullifying Event (as such term is defined
below) shall have occurred and be continuing at the time the Merger Agreement is
terminated,  in the  event that the  Merger Agreement is  terminated pursuant to
Article VIII thereof  (regardless of whether  such termination is  by Parent  or
Subject  Company) and  prior to  or concurrently  with such  termination a First
Trigger Event  (as such  term is  defined below)  shall have  occurred,  Subject
Company shall pay to Parent a cash fee of $25 million. Such fee shall be payable
in  immediately available funds  on or before the  second business day following
such termination of the Merger Agreement.

    (b) In  addition, unless  a  Nullifying Event  shall  have occurred  and  be
continuing at the time the Merger Agreement is terminated, in the event that (i)
the  Merger  Agreement  shall  have been  terminated  pursuant  to  Article VIII
thereof, (ii) prior  to or concurrently  with such termination  a First  Trigger
Event  shall have occurred, and  (iii) prior to, concurrently  with or within 18
months after such  termination an  Acquisition Event  (as such  term is  defined
below)  shall have occurred,  Subject Company shall pay  to Parent an additional
cash fee of  (i) $100  million, less  (ii) any  amount paid  by Subject  Company
pursuant  to Paragraph  2(a) hereof.  Such fee  shall be  payable in immediately
available funds on or before the second business day following the occurrence of
such Acquisition Event.

    (c) As used herein, a "FIRST TRIGGER EVENT" shall mean the occurrence of any
of the following events:

        (i) Subject Company's Board of Directors shall have failed to approve or
    recommend the Merger  Agreement or the  Merger, or shall  have withdrawn  or
    modified  in a manner adverse to Parent is approval or recommendation of the
    Merger Agreement or the Merger, or shall have resolved or publicly announced
    an intention to do either of the foregoing;

        (ii) Subject  Company or  any Significant  Subsidiary (as  such term  is
    defined  below),  or  the  Board  of  Directors  of  Subject  Company  or  a
    Significant Subsidiary,  shall have  recommended  that the  stockholders  of
    Subject  Company approve any  Acquisition Proposal (as  such term is defined
    below) or shall have entered into an agreement with respect to,  authorized,
    approved,  proposed or publicly  announced its intention  to enter into, any
    Acquisition Proposal;

                                      E-1
<PAGE>
       (iii) the Merger Agreement shall not  have been approved at a meeting  of
    Subject  Company stockholders which has been  held for that purpose prior to
    termination of the Merger Agreement in  accordance with its terms, if  prior
    thereto  it shall have  been publicly announced that  any person (other than
    Parent or  any  of  its  Subsidiaries) shall  have  made,  or  disclosed  an
    intention to make, an Acquisition Proposal;

       (iv)  any person (together  with its affiliates  and associates) or group
    (as such terms are used for purposes  of Section 13(d) of the Exchange  Act)
    (other  than  Parent and  its Subsidiaries)  shall have  acquired beneficial
    ownership (as  such  term is  used  for purposes  of  Section 13(d)  of  the
    Exchange Act) or the right to acquire beneficial ownership of 50% or more of
    the  then outstanding shares of the stock then entitled to vote generally in
    the election of directors of Subject Company or a Significant Subsidiary; or

        (v) following the  making of  an Acquisition  Proposal, Subject  Company
    shall  have  breached  any covenant  or  agreement contained  in  the Merger
    Agreement such  that  Parent  would  be entitled  to  terminate  the  Merger
    Agreement  under Section 8.1(d) thereof (without  regard to any grace period
    provided  for  therein)  unless  such  breach  is  promptly  cured   without
    jeopardizing  consummation of the Merger pursuant to the terms of the Merger
    Agreement.

    (d) As used herein, "ACQUISITION EVENT"  shall mean the consummation of  any
event  described in  the definition of  "Acquisition Proposal,"  except that the
percentage reference contained  in clause (C)  of such definition  shall be  50%
instead of 20%.

    (e)  As  used herein,  "ACQUISITION PROPOSAL"  shall  mean any  (i) publicly
announced proposal, (ii) regulatory application  or notice (whether in draft  or
final  form), (iii) agreement or understanding,  (iv) disclosure of an intention
to make a proposal, or (v) amendment to  any of the foregoing, made or filed  on
or  after the  date hereof, in  each case with  respect to any  of the following
transactions with a counterparty other than  Parent or any of its  Subsidiaries:
(A)  a merger  or consolidation, or  any similar  transaction, involving Subject
Company or any  Significant Subsidiary  (other than  mergers, consolidations  or
similar  transactions involving solely Subject Company and/or one or more wholly
owned Subsidiaries of Subject Company and  other than a merger or  consolidation
as to which the common shareholders of Subject Company immediately prior thereto
in  the aggregate  own at  least 70% of  the common  stock of  the publicly held
surviving or successor corporation (or any publicly held ultimate parent company
thereof) immediately following consummation thereof);  (B) a purchase, lease  or
other  acquisition of  all or  substantially all  of the  assets or  deposits of
Subject Company  or any  Significant  Subsidiary; or  (C)  a purchase  or  other
acquisition  (including  by  way  of merger,  consolidation,  share  exchange or
otherwise) of securities representing 20% or more of the voting power of Subject
Company or any  Significant Subsidiary. Notwithstanding  the foregoing,  Subject
Company confirms that the proposal made by Wells Fargo & Company ("Wells") prior
to  the date hereof  to enter into  a business combination  with Subject Company
shall also constitute an Acquisition Proposal which has been publicly announced;
PROVIDED, HOWEVER, that solely for purposes of Paragraph 2(c)(iii) hereof,  such
proposal shall not constitute a publicly announced Acquisition Proposal if Wells
shall  have publicly announced the withdrawal of such proposal prior to the time
Subject Company mails to its stockholders  a proxy statement in connection  with
the  stockholder  meeting  called to  approve  and adopt  the  Merger Agreement.
Nothing contained in  the proviso  to the immediately  preceding sentence  shall
imply  that any proposal made by Wells after the date hereof does not constitute
an Acquisition Proposal for purposes of Paragraph 2(e)(iii) hereof.

    (f) As  used herein,  "NULLIFYING EVENT"  shall mean  any of  the  following
events  occurring  and continuing  at  a time  when  Subject Company  is  not in
material breach of any  of its covenants or  agreements contained in the  Merger
Agreement:  (i) Parent shall be in breach  of any of its covenants or agreements
contained in the Merger Agreement such that Subject Company shall be entitled to
terminate the  Merger  Agreement pursuant  to  Section 8.1(d)  thereof  (without
regard  to  any grace  period provided  for therein),  (ii) the  stockholders of
Parent shall have  voted and  failed to  approve the  Parent Vote  Matters at  a
meeting  of such  stockholders which has  been held  for that purpose  or at any
adjournment or postponement thereof (unless the Merger Agreement shall not  have
been  approved at a meeting of Subject Company stockholders which was held on or
prior to such date for the purpose of

                                      E-2
<PAGE>
voting with respect to the Merger Agreement) or (iii) the Board of Directors  of
Parent  shall have  failed to  approve or recommend  the Parent  Vote Matters or
shall have  withdrawn, modified  or changed  in any  manner adverse  to  Subject
Company  its approval or recommendation of the Parent Vote Matters or shall have
resolved or publicly announced its intention to do any of the foregoing.

    (g) As  used  herein, "SIGNIFICANT  SUBSIDIARY"  shall mean  a  "significant
subsidiary,"  as  defined in  Rule  1-02 of  Regulation  S-X promulgated  by the
Securities and Exchange Commission, of Subject Company.

    3.  To the extent  that Subject Company is  prohibited by applicable law  or
regulation,  or  by  administrative actions  or  policy  of a  Federal  or state
financial institution  supervisory  agency  having jurisdiction  over  it,  from
making  the payments required to  be paid by Subject  Company herein in full, it
shall immediately  so  notify Parent  and  thereafter  deliver or  cause  to  be
delivered, from time to time, to Parent, the portion of the payments required to
be  paid by it herein  that it is no longer  prohibited from paying, within five
business days  after the  date on  which the  Subject Company  is no  longer  so
prohibited; PROVIDED, HOWEVER, that if Subject Company at any time is prohibited
by  applicable law or  regulation, or by  administrative actions or  policy of a
Federal or state  financial institution supervisory  agency having  jurisdiction
over  it, from making the payments required  hereunder in full, it shall (i) use
its reasonable  best  efforts  to  obtain  all  required  regulatory  and  legal
approvals  and to file any required notices  as promptly as practicable in order
to make such payments, (ii) within five days of the submission or receipt of any
documents relating to any  such regulatory and  legal approvals, provide  Parent
with copies of the same, and (iii) keep Parent advised of both the status of any
such request for regulatory and legal approvals, as well as any discussions with
any relevant regulatory or other third party reasonably related to the same.

    4.   Except where federal law  specifically applies, this Agreement shall be
construed and interpreted according to the laws of the State of Delaware without
regard to conflicts of laws principles thereof.

    5.  This Agreement may  be executed in any  number of counterparts, each  of
which  shall be deemed an  original, but all of  which together shall constitute
one and the same instrument.

    6.  Nothing contained herein shall be deemed to authorize Subject Company or
Parent to breach any provision of the Merger Agreement.

    Please confirm your agreement  with the understandings  set forth herein  by
signing and returning to us the enclosed copy of this Agreement.

                                          Very truly yours,

                                          FIRST INTERSTATE BANCORP

                                          By:  /S/ WILLIAM E.B. SIART
                                             -----------------------------------
                                              Name: William E.B. Siart
                                              Title: Chairman and Chief
                                                  Executive Officer
Accepted and agreed to as of
the date first above written:

FIRST BANK SYSTEM, INC.

By:  /S/ JOHN F. GRUNDHOFER
   -------------------------------------------
    Name: John F. Grundhofer
    Title: Chairman, President and
         Chief Executive Officer

                                      E-3
<PAGE>
                    [J.P. MORGAN SECURITIES INC. LETTERHEAD]

                                                                      APPENDIX F

November 5, 1995

The Board of Directors
First Bank System, Inc.
First Bank Place
601 Second Avenue South
Minneapolis, MN 55402-4302

Attention: Mr. John F. Grundhofer
        Chairman, President and Chief Executive Officer

Ladies and Gentlemen:

You  have requested our  opinion as to  the fairness, from  a financial point of
view, to the holders of Common Stock  of First Bank System, Inc. (the  "Company"
or  "FBS") of the Exchange Ratio (as  defined below) in the proposed merger (the
"Merger") of the Company's subsidiary, Eleven
Acquisition Corp. ("Acquisition") with and into First Interstate Bancorp ("First
Interstate"), pursuant to the Agreement and Plan of Merger dated as of  November
5,  1995 (the  "Merger Agreement")  between the  Company, Acquisition  and First
Interstate.

We understand that the Merger Agreement provides that:

        (a) Each share of Common Stock of First Interstate will be converted  in
            the  Merger into  2.6 shares of  Common Stock of  FBS (the "Exchange
            Ratio").

        (b) Acquisition will merge with and into First Interstate.

In arriving at our  written opinion, we have,  among other things: (i)  reviewed
the  Merger Agreement; (ii) reviewed First Interstate's Annual Report, Form 10-K
and related financial information for the three fiscal years ending December 31,
1992 through December 31,  1994, First Interstate's Form  10-Q for the  quarters
ending  March  31, 1995  and  June 30,  1995,  and First  Interstate's unaudited
financial results for the  three month period ending  September 30, 1995;  (iii)
reviewed  FBS's Annual Report,  Form 10-K and  related financial information for
each of the  three fiscal  years ending December  31, 1992  though December  31,
1994,  FBS's Form 10-Q for the quarters ending March 31, 1995 and June 30, 1995,
FBS's unaudited financial results  for the three  month period ending  September
30,  1995, and the unaudited  balance sheet and shares  outstanding for FBS, pro
forma for the acquisition of FirsTier  Financial Inc. as at September 30,  1995;
(iv)  held discussions  with certain members  of the senior  management of First
Interstate and FBS  regarding the Merger,  certain aspects of  past and  current
business   operations,  financial  condition  and   future  prospects  of  their
respective companies, and the effects of  the Merger on the financial  condition
and  future prospects of  FBS and First Interstate;  (v) reviewed the historical
market prices and trading activity for the Common Stock of each of FBS and First
Interstate and compared  them with  those of certain  publicly traded  companies
which  we deemed to be relevant; (vi) compared the financial terms of the Merger
with the financial  terms of certain  other mergers and  acquistions which  were
publicly  available and which we deemed to be relevant; (vii) considered the pro
forma effect of the  Merger on FBS's capitalization  ratios, earnings, and  book
value  per share; and (viii) reviewed  such other information, financial studies
and analyses and performed such other investigations and took into account  such
other matters as we deemed necessary.

In  giving our  opinion, we  have relied  upon and  assumed, without independent
verification, the accuracy and completeness of all information that was publicly
available or was furnished to us by the Company or First Interstate or otherwise
reviewed by us, and we have not assumed any responsibility therefor. We have not
conducted any  valuation or  appraisal of  any assets  or liabilities  of  First
Interstate  or the Company, nor have  any valuations or appraisals been provided
to us. In relying on  financial analyses and forecasts  provided to us, we  have
assumed that they have been reasonably

                                      F-1
<PAGE>
prepared  based on assumptions reflecting the best currently available estimates
and judgments by management as to the expected future results of operations  and
financial  condition of the Company and  First Interstate to which such analyses
or forecasts relate.  We have also  assumed that  the Merger will  have the  tax
consequences  contemplated by the  Merger Agreement, and  that the other actions
contemplated by the Merger  Agreement will be consummated  as described in  such
Merger Agreement.

Our  opinion is necessarily based on economic, market and other conditions as in
effect on, and the information made available  to us as of, the date hereof.  It
should  be understood that  subsequent developments may  affect this opinion and
that we do not  have any independent obligation  to update, revise, or  reaffirm
this opinion.

We  have acted as financial advisor to  the Company with respect to the proposed
Merger and  will  receive a  fee  from the  Company  for our  services,  and  an
additional fee if the proposed Merger is consummated. From time to time, we have
offered  and provided investment  banking and other services  to the Company. In
the ordinary course of their businesses,  our affiliates may actively trade  the
debt  and equity securities  of the Company  and First Interstate  for their own
accounts or for the accounts of customers and, accordingly, they may at any time
hold long or short positions in such securities.

On the basis of and subject to the  foregoing, it is our opinion as of the  date
hereof  that the Exchange Ratio in the proposed Merger is fair, from a financial
point of view, to the holders of Common Stock of the Company.

This letter is provided to the Board  of Directors of the Company in  connection
with and for the purposes of its evaluation of the Merger. This opinion does not
constitute  a recommendation to  any shareholder of  the Company as  to how such
shareholder should vote  with respect  to the Merger.  This opinion  may not  be
used, disclosed, referred to or communicated by you (in whole or in part) to any
third  party for any purpose whatsoever except with our prior written consent in
each  instance.  This  opinion   may  be  reproduced  in   full  in  the   Proxy
Statement/Prospectus  mailed  to  shareholders  of  the  Company,  but  may  not
otherwise be  disclosed  publicly  in  any  manner  without  our  prior  written
approval.

Very truly yours,

J.P. MORGAN SECURITIES INC.

   
By:/s/ NICHOLAS B. PAUMGARTEN
   -------------------------------------------
   Name: Nicholas B. Paumgarten
   Title: Managing Director
    

                                      F-2
<PAGE>
                       [GOLDMAN, SACHS & CO. LETTERHEAD]

                                                                      APPENDIX G
November 6, 1995
Board of Directors
First Interstate Bancorp
633 West Fifth Street
Los Angeles, California  90071

Gentlemen and Madame:

    You  have requested that we confirm our  oral opinion as of November 5, 1995
as to the fairness to the holders of the outstanding shares of Common Stock, par
value  $2.00  per  share  (the  "Shares"),  of  First  Interstate  Bancorp  (the
"Company")  of the exchange ratio of 2.6 shares of Common Stock, par value $1.25
per share, of First Bank System, Inc. ("FBS") to be received for each Share (the
"Exchange Ratio")  pursuant to  the merger  (the "Merger")  contemplated by  the
Agreement  and Plan  of Merger dated  as of  November 5, 1995  among FBS, Eleven
Acquisition Corp.,  a  wholly-owned subsidiary  of  FBS, and  the  Company  (the
"Agreement").

    Goldman,  Sachs & Co.  ("Goldman Sachs"), as part  of its investment banking
business, is  continually  engaged in  the  valuation of  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. We  are familiar with  the Company  having performed investment
banking services for  the Company  from time  to time  and having  acted as  its
financial  advisor  in  connection with  the  Agreement. We  also  have provided
certain investment banking  services to FBS  from time to  time and may  provide
investment  banking services to the combined company in the future. In addition,
Goldman Sachs is a full service securities firm and in the course of its trading
activities it may from time to time effect transactions, for its own account  or
the  account  of  customers, and  hold  positions  in securities  or  options on
securities of the Company and FBS.

    In connection with this opinion, we  have reviewed, among other things,  the
Agreement; Annual Reports to Stockholders and Annual Reports on Form 10-K of the
Company  and FBS  for the  five years ended  December 31,  1994; certain interim
reports to stockholders and  Quarterly Reports on Form  10-Q of the Company  and
FBS;  certain other communications from the  Company and FBS to their respective
stockholders; and  certain internal  financial analyses  and forecasts  for  the
Company and FBS prepared by their respective managements, including analyses and
forecasts  of certain cost savings,  operating efficiencies, revenue effects and
financial synergies (collectively, the "Synergies") expected by the Company  and
FBS  to  be achieved  as a  result of  the  Merger. We  have also  reviewed, and
considered in our analysis,  information prepared by  senior managements of  the
Company and FBS relating to the relative contributions of the Company and FBS to
the  combined  company and  the  estimated pro  forma  impact of  the  Merger on
earnings per  share, consolidated  capitalization  and certain  other  financial
ratios for the combined company as compared to the Company and FBS. We also have
held  discussions with members of  the senior management of  the Company and FBS
regarding the past  and current business  operations, regulatory  relationships,
financial  condition and  future prospects  of their  respective companies, each
senior managements'  assessment of  the strategic  fit and  implications of  the
Merger,  and the  Synergies. We  also have reviewed  with members  of the senior
management of the Company the results of the Company's due diligence examination
of FBS. In addition,  we have reviewed the  reported price and trading  activity
for the Shares and FBS Common Stock, compared certain financial and stock market
information  for the Company and FBS  with similar information for certain other
companies   the   securities   of   which   are   publicly   traded,    reviewed

                                      G-1
<PAGE>
the  financial terms of  certain recent business  combinations in the commercial
banking industry specifically  and in other  industries generally and  performed
such other studies and analyses as we considered appropriate.

   
    We  have  relied  without  independent verification  upon  the  accuracy and
completeness of all  of the financial  and other information  reviewed by us  or
conveyed to us in discussions with senior managements of the Company and FBS for
purposes  of this opinion. In  that regard, we have  assumed, with your consent,
that the financial forecasts, including,  without limitation, the Synergies  and
projections   regarding  under-performing  and  non-performing  assets  and  net
charge-offs have  been  reasonably  prepared  on a  basis  reflecting  the  best
currently available judgments and estimates of the Company and FBS and that such
forecasts will be realized in the amounts and at the times contemplated thereby.
We  are not experts in the evaluation  of loan and lease portfolios for purposes
of assessing the adequacy of the allowances for losses with respect thereto  and
have  assumed, with your consent,  that such allowances for  each of the Company
and FBS are in the  aggregate adequate to cover  all such losses. Similarly,  we
have  assumed,  with your  consent and  without  independent analysis,  that the
obligations of  the Company  and  FBS pursuant  to derivatives,  swaps,  foreign
exchange,  financial instruments and off-balance sheet lending-related financial
instruments will  not have  an adverse  effect which  would be  relevant to  our
analysis.  In addition, we have not reviewed individual credit files nor have we
made an independent evaluation or appraisal of the assets and liabilities of the
Company or FBS  or any of  their respective  subsidiaries and we  have not  been
furnished  with any such evaluation  or appraisal. You have  informed us, and we
have assumed,  that the  Merger  is of  long-term  strategic importance  to  the
Company.  We also have assumed, with  your consent, that obtaining any necessary
regulatory approvals and third-party consents  for the Merger or otherwise  will
not  have  a materially  adverse  effect on  the  Company, FBS  or  the combined
company. Our opinion  as to  the fairness of  the Exchange  Ratio addresses  the
ownership  position in  the combined  company to be  received by  the holders of
Shares pursuant to the Exchange  Ratio on the terms  set forth in the  Agreement
and  does not address the  future trading or acquisition  value for the stock of
the combined company.  In addition, our  opinion does not  address the  relative
merits  of  the  Merger and  alternative  potential transactions.  We  also have
assumed with your consent that the Merger will be accounted for as a pooling  of
interests under generally accepted accounting principles.
    

    Our  opinion is directed to  the Board of Directors  of the Company and does
not constitute a recommendation to any stockholder of the Company as to how such
stockholder should vote at  the stockholders' meeting to  be held in  connection
with the Merger.

    Based upon and subject to the foregoing and based upon such other matters as
we  consider relevant, we hereby confirm our oral opinion as of November 5, 1995
that the Exchange  Ratio pursuant to  the Agreement  is fair to  the holders  of
Shares.

Very truly yours,

GOLDMAN, SACHS & CO.

                                      G-2
<PAGE>
                       [GOLDMAN, SACHS & CO. LETTERHEAD]

November 19, 1995

Board of Directors
First Interstate Bancorp
633 West Fifth Street
Los Angeles, California 90071

Gentlemen and Madame:

    On November 5, 1995, First Interstate Bancorp (the "Company") and First Bank
System,  Inc. ("FBS") entered into an Agreement  and Plan of Merger (the "Merger
Agreement"), which provides, among other things,  for the merger of the  Company
with  Eleven Acquisition Corp., a wholly owned subsidiary of FBS (the "Merger").
Pursuant to the Merger, each outstanding share of Common Stock, par value  $2.00
per  share (the "Shares"), of the Company will be converted into 2.6 shares (the
"Exchange Ratio") of Common Stock, par value $1.25 per share, of FBS.

    We have delivered to you,  on November 5, 1995, our  oral opinion as to  the
fairness  of the Exchange Ratio to the holders of Shares. We also have confirmed
our oral opinion in our written opinion dated November 6, 1995. The information,
analyses, assumptions and limitations contained  or referred to in our  November
6,  1995 written  opinion are made  a part  of this letter  and are incorporated
herein by reference.

   
    It is understood that  this letter is  for the information  of the Board  of
Directors   of  the  Company  and  does   not  constitute  a  recommendation  to
stockholders of the Company  as to the  voting of their  shares on the  proposed
Merger or any other transaction.
    

    This  is to advise you that, as of  the date hereof, nothing has come to our
attention that  would cause  us to  withdraw or  amend either  our oral  opinion
delivered  to you on November 5, 1995,  or the confirmation thereof delivered to
you in our written opinion dated November 6, 1995.

Very truly yours,

GOLDMAN, SACHS & CO.

                                      G-3
<PAGE>
                     [MORGAN STANLEY & CO. INC. LETTERHEAD]

                                                                      APPENDIX H

                                                                November 5, 1995
Board of Directors
First Interstate Bancorp
633 West Fifth Street
Los Angeles, CA 90071

Members of the Board:

    We   understand  that  First  Interstate   Bancorp  ("First  Interstate"  or
"Company") and First  Bank System, Inc.  ("First Bank") are  proposing to  enter
into  an Agreement and  Plan of Merger (the  "Proposed Merger Agreement"), which
will provide, among other things, for the merger of First Interstate with  First
Bank  (the "Merger"). Pursuant  to the Merger, each  outstanding share of common
stock of  First Interstate  (the "First  Interstate Common  Stock"), other  than
shares  held in treasury or held by First Bank or any affiliate of First Bank or
as to which dissenters' rights have been perfected, will be converted into  2.60
shares  (the "First  Bank Exchange  Ratio") of common  stock of  First Bank (the
"First Bank Common  Stock"). Based  on the closing  price of  First Bank  Common
Stock  on November 3, 1995, the indicated value of the First Bank Exchange Ratio
would be $132.28 per share of First Interstate Common Stock.

    You have asked for our opinion as  to whether the First Bank Exchange  Ratio
pursuant to the Proposed Merger Agreement is fair from a financial point of view
to  holders of  First Interstate  Common Stock  (other than  First Bank  and its
affiliates).

    For purposes of the opinion set forth herein, we have:

       (i)   analyzed certain publicly available financial statements and  other
             information of First Interstate and First Bank, respectively;

       (ii)  analyzed  internal  financial  statements and  other  financial and
             operating data concerning First Interstate and First Bank  prepared
             by   the   managements  of   First   Interstate  and   First  Bank,
             respectively;

       (iii) analyzed financial projections prepared by the managements of First
             Interstate and First Bank, respectively;

       (iv)  discussed the past and  current operations and financial  condition
             and  the prospects of  First Interstate and  First Bank with senior
             executives of First Interstate and First Bank, respectively;

       (v)   reviewed the reported  prices and  trading activity  for the  First
             Interstate Common Stock and the First Bank Common Stock;

       (vi)  compared  the financial  performance of First  Interstate and First
             Bank and the prices, trading activity and trading multiples of  the
             First  Interstate Common Stock and the First Bank Common Stock with
             that of certain other comparable  bank holding companies and  their
             securities;

       (vii) discussed  the strategic objectives of the  merger and the plan for
             the combined company with senior executives of First Interstate and
             First Bank;

       (viii)analyzed certain pro forma  financial projections for the  combined
             company prepared by First Interstate and First Bank;

       (ix)  reviewed  and  discussed  with  the  senior  managements  of  First
             Interstate and First Bank certain  estimates of the potential  cost
             savings  and  anticipated revenue  enhancements expected  to result
             from the Merger;

       (x)   reviewed the financial terms, to the extent publicly available,  of
             certain comparable bank holding company merger transactions;

       (xi)  participated   in  discussions   among  representatives   of  First
             Interstate and First Bank and their financial and legal advisors;

                                      H-1
<PAGE>
       (xii) reviewed  the  Proposed  Merger   Agreement  and  certain   related
             agreements; and

       (xiii)performed such other analyses as we have deemed appropriate.

    We  are aware of  the proposal by  Wells Fargo &  Company ("Wells Fargo") to
combine with First Interstate at an exchange  ratio of .625 of a share of  Wells
Fargo  Common Stock for each  share of First Interstate  Common Stock (the ".625
Wells Fargo Ratio").  We also have  been advised by  senior management of  First
Interstate that senior management of Wells Fargo has orally indicated that under
certain  conditions it might be willing to  raise the proposed exchange ratio to
no higher than .650  of a share of  Wells Fargo Common Stock  for each share  of
First  Interstate  Common Stock  (the ".650  Wells Fargo  Ratio"). Based  on the
closing price of  Wells Fargo Common  Stock on November  3, 1995, the  indicated
value  of the  .625 Wells Fargo  Ratio and the  .650 Wells Fargo  Ratio would be
$132.66 and $137.96, respectively, per  share of First Interstate Common  Stock.
We  note that based on closing prices  on November 3, 1995, the indicated values
of both the Wells Fargo Ratios were higher than the indicated value of the First
Bank Exchange Ratio.

    We have  assumed  and  relied  upon  without  independent  verification  the
accuracy  and completeness of the information reviewed by us for the purposes of
this opinion. With respect to the financial projections, including estimates  of
cost  savings and  revenue enhancements expected  to result from  the Merger, we
have assumed that  they have been  reasonably prepared on  bases reflecting  the
best  currently  available  estimates  and  judgments  of  the  future financial
performance of  First Interstate  and  First Bank,  respectively. We  have  also
assumed  that off-balance sheet  activities of First  Interstate and First Bank,
including  derivatives  and  other  similar  financial  instruments,  will   not
adversely  affect the future financial position and results of operations of the
combined enterprise. We have not made any independent valuation or appraisal  of
the  assets or liabilities of  First Interstate or First  Bank, nor have we been
furnished with any such appraisals and we have not examined any individual  loan
credit  files of First Interstate and First Bank. We have also assumed with your
consent that the Merger will  be accounted for as  a pooling of interests  under
generally  accepted accounting principals.  Our opinion is  necessarily based on
economic, market and other conditions as in effect on, and the information  made
available to us as of, the date hereof.

    We  have  acted as  financial advisor  to  the Board  of Directors  of First
Interstate in connection with  this transaction and will  receive a fee for  our
services. In the past, Morgan Stanley & Co. Incorporated and its affiliates have
provided  financial  advisory and  financing services  for First  Interstate and
First Bank and have received fees for  the rendering of these services. We  have
also  provided financial advisory and financing  services for Wells Fargo in the
past, and have received fees for the rendering of these services.

   
    It is understood that  this letter is  for the information  of the Board  of
Directors  of  First  Interstate and  does  not constitute  a  recommendation to
stockholders of  First  Interstate as  to  the voting  of  their shares  on  the
proposed Merger or any other transaction.
    

    Based  on the foregoing, we  are of the opinion on  the date hereof that the
First Bank Exchange Ratio is fair from  a financial point of view to holders  of
First Interstate Common Stock (other than First Bank and its affiliates).

    We  note that it  is also our view  on the date  hereof, based upon publicly
available information in the case of Wells Fargo, that each of the .625 and .650
Wells Fargo Ratios would be fair from  a financial point of view to the  holders
of First Interstate Common Stock (other than Wells Fargo and its affiliates).

                                          Very truly yours,
                                          MORGAN STANLEY & CO. INCORPORATED
                                          By:      /s/ DONALD A. MOORE, JR.
                                             -----------------------------------
                                             Donald A. Moore, Jr.
                                             Managing Director

                                      H-2
<PAGE>
                     [MORGAN STANLEY & CO. INC. LETTERHEAD]

                                                               November 19, 1995

Board of Directors
First Interstate Bancorp
633 West Fifth Street
Los Angeles, CA 90071

Members of the Board:

    On November 5, 1995, First Interstate Bancorp ("First Interstate") and First
Bank  System, Inc. ("First Bank")  entered into an Agreement  and Plan of Merger
(the "Merger Agreement") which provides, among  other things, for the merger  of
First  Interstate with First  Bank (the "Merger"). Pursuant  to the Merger, each
outstanding share of First  Interstate Common Stock, other  than shares held  in
treasury  or held by  First Bank or any  affiliate of First Bank  or as to which
dissenters' rights have been perfected, will be converted into 2.60 shares  (the
"First  Bank Exchange Ratio") of  First Bank Common Stock.  Based on the closing
price of First Bank Common  Stock on November 17,  1995, the indicated value  of
the  First Bank Exchange  Ratio would be  $137.80 per share  of First Interstate
Common Stock.

    We have been informed of the revised offer by Wells Fargo & Company  ("Wells
Fargo")  on November 13,  1995 to combine  with First Interstate  at an exchange
ratio of two-thirds of  a share of  Wells Fargo Common Stock  for each share  of
First Interstate Common Stock (the "Two-Thirds Wells Fargo Ratio"). Based on the
closing  price of Wells  Fargo Common Stock  on November 17,  1995 the indicated
value of the Two-Thirds Wells  Fargo Ratio would be  $141.17 per share of  First
Interstate Common Stock.

    You  have asked us to reaffirm our opinion  dated November 5, 1995 as to the
fairness from a financial point of view of the First Bank Exchange Ratio.

    For purposes of the opinion set forth herein, we have:

           (i)
           reviewed the  reported  prices and  trading  activity for  the  First
           Interstate Common Stock and the First Bank Common Stock from November
    3, 1995 to the date hereof;

          (ii)
           confirmed  with senior managements of First Interstate and First Bank
           that there  have been  no  material changes  or developments  in  the
    information  previously  provided to  us  by the  respective  managements in
    connection with  our  November  5,  1995  opinion,  except  for  information
    relating to the revised offer by Wells Fargo; and

         (iii)
           performed such other analyses as we have deemed appropriate.

    The information, analyses, assumptions and limitations contained or referred
to in our November 5, 1995 opinion letter are made a part of this letter and are
incorporated herein by reference.

   
    It  is understood that  this letter is  for the information  of the Board of
Directors of  First  Interstate and  does  not constitute  a  recommendation  to
stockholders  of  First Interstate  as  to the  voting  of their  shares  on the
proposed Merger or any other transaction.
    

    Based on the foregoing,  this is to  advise you that on  the date hereof  we
reaffirm  our opinion of November 5, 1995  that the First Bank Exchange Ratio is
fair from a financial point of view to holders of First Interstate Common Stock.

                                          Very truly yours,
                                          MORGAN STANLEY & CO. INCORPORATED
                                          By: /s/ DONALD A. MOORE, JR.
                                             -----------------------------------
                                             Managing Director

                                      H-3
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

    Under  Delaware law, the  directors and officers of  First Bank System, Inc.
(the "Company") are entitled, under certain circumstances, to be indemnified  by
the  Company against all expenses and  liabilities incurred or imposed upon them
as a result of  suits brought against  them as such  directors and officers,  if
they  act in good faith and in a manner  they reasonably believe to be in or not
opposed to the best interests of the Company, and, with respect to any  criminal
action  or proceeding,  have no  reasonable cause  to believe  their conduct was
unlawful, except  that no  indemnification  shall be  made against  expenses  in
respect  of any claim, issue or matter as to which they shall have been adjudged
to be liable to  the Company, unless and  only to the extent  that the court  in
which  such action  or suit was  brought shall determine  upon application that,
despite the adjudication of  liability but in view  of all the circumstances  of
the  case, they are  fairly and reasonably  entitled to be  indemnified for such
expenses which such  court shall deem  proper. Any such  indemnification may  be
made   by  the  Company  only  as  authorized  in  each  specific  case  upon  a
determination   by   the   stockholders   or   disinterested   directors    that
indemnification  is  proper  because  the  indemnitee  has  met  the  applicable
statutory standard of conduct.

    Article Ninth of  the Company's  Restated Certificate  of Incorporation,  as
amended,  provides that  a director shall  not be  liable to the  Company or its
stockholders for monetary damages for a breach of fiduciary duty as a  director,
except for liability (i) for any breach of the director's duty of loyalty to the
Company  or its stockholders,  (ii) for acts  or omissions not  in good faith or
which involve intentional misconduct or a knowing violation of law, (iii)  under
the  Delaware  statutory  provisions  making  directors  personally  liable  for
unlawful dividends or unlawful stock repurchases or redemptions or (iv) for  any
transaction from which the director derived an improper personal benefit.

    The  Bylaws of the  Company provide that  the officers and  directors of the
Company and certain others shall be indemnified substantially to the same extent
permitted by Delaware law.

    The  Company  maintains  a  standard  policy  of  officers'  and  directors'
liability insurance.

ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

    (a) Exhibits

<TABLE>
<C>        <S>
      2.1  Agreement and Plan of Merger, dated as of November 5, 1995, by and among First
            Bank System, Inc., Eleven Acquisition Corp. and First Interstate Bancorp.
            (Included in Joint Proxy Statement/Prospectus as Appendix A.) The registrant
            agrees to furnish supplementally a copy of omitted schedules to the Commission
            upon request.
      4.1  Restated Certificate of Incorporation, as amended, of First Bank System, Inc.
            (Incorporated by reference to Exhibit 2.1 to the registrant's Form 8-A/A-2
            dated October 6, 1994, File No. 1-6880.)
      4.2  Certificate of Designation for First Bank System, Inc. Series 1990A Preferred
            Stock. (Incorporated by reference to Exhibit 4.4 to Amendment No. 1 to the
            registrant's Registration Statement on Form S-3, File No. 33-42650.)
      4.3  Certificate of Designation for First Bank System, Inc. Series 1991A Convertible
            Preferred Stock. (Incorporated by reference to Exhibit 4.3 to the registrant's
            Registration Statement on Form S-4, File No. 33-50700.)
      4.4  Certificate of Designation for First Bank System, Inc. Series A Junior
            Participating Preferred Stock, as amended. (Incorporated by reference to
            Exhibit 2.4 to the registrant's Form 8-A/A-2 dated October 6, 1994, File No.
            1-6880.)
      4.5  Bylaws of First Bank System, Inc. (Incorporated by reference to Exhibit 3B to
            the registrant's Annual Report on Form 10-K for the year ended December 31,
            1993, File No. 1-6880.)
</TABLE>

                                      II-1
<PAGE>
<TABLE>
<C>        <S>
      4.6  Rights Agreement dated as of December 21, 1988, between First Bank System, Inc.
            and Morgan Shareholder Services Trust Company (now known as First Chicago Trust
            Company of New York). (Incorporated by reference to Exhibit 1 to the
            registrant's Current Report on Form 8-K dated January 5, 1989, File No.
            1-6880.)
      4.7  Amendment No. 1 dated as of May 30, 1990, to Rights Agreement. (Incorporated by
            reference to Exhibit 4(a) to the registrant's Current Report on Form 8-K dated
            June 5, 1990, File No. 1-6880.)
      4.8  Amendment No. 2 dated as of February 17, 1993, to Rights Agreement.
            (Incorporated by reference to Exhibit 4(a) to the registrant's Current Report
            on Form 8-K filed March 1, 1993, File No. 1-6880.)
      4.9  Amendment No. 3 dated November 9, 1995, to Rights Agreement. (Incorporated by
            reference to Exhibit 4.1 to the registrant's Current Report on Form 8-K filed
            November 16, 1995, File No. 1-6880.)
     4.10  Stock Purchase Agreement, dated as of May 30, 1990, among Corporate Partners,
            L.P., Corporate Offshore Partners, L.P., The State Board of Administration of
            Florida and First Bank System, Inc. (without exhibits). (Incorporated by
            reference to Exhibit 4.8 to Amendment No. 1 to the registrant's Registration
            Statement on Form S-3, File No. 33-42650.)
     4.11  First Amendment, dated as of June 30, 1990, to Stock Purchase Agreement among
            Corporate Partners, L.P., Corporate Offshore Partners, L.P., The State Board of
            Administration of Florida and First Bank System, Inc. (Incorporated by
            reference to Exhibit 4.9 to Amendment No. 1 to the registrant's Registration
            Statement on Form S-3, File No. 33-42650.)
     4.12  Second Amendment, dated July 18, 1990, to Stock Purchase Agreement among
            Corporate Partners, L.P., Corporate Offshore Partners, L.P., The State Board of
            Administration of Florida and First Bank System, Inc. (Incorporated by
            reference to Exhibit 4.10 to Amendment No. 1 to the registrant's Registration
            Statement on Form S-3, File No. 33-42650.)
     4.13  Stock Purchase Agreement, dated as of May 30, 1990, between The State Board of
            Administration of Florida and First Bank System, Inc. (without exhibits).
            (Incorporated by reference to Exhibit 4.11 to Amendment No. 1 to the
            registrant's Registration Statement on Form S-3, File No. 33-42650.)
     4.14  Form of Periodic Stock Purchase Right. (Incorporated by reference to Exhibit
            4.12 to Amendment No. 1 to the registrant's Registration Statement on Form S-3,
            File No. 33-42650.)
     4.15  Form of Risk Event Warrant. (Incorporated by reference to Exhibit 4.13 to
            Amendment No. 1 to the registrant's Registration Statement on Form S-3, File
            No. 33-42650.)
     4.16  Registration Rights Agreement, dated as of July 18, 1990, among Corporate
            Partners, L.P., Corporate Offshore Partners, L.P., The State Board of
            Administration of Florida and First Bank System, Inc. (Incorporated by
            reference to Exhibit 4.14 to Amendment No. 1 to the registrant's Registration
            Statement on Form S-3, File No. 33-42650.)
     4.17  Registration Rights Agreement, dated as of July 18, 1990, between The State
            Board of Administration of Florida and First Bank System, Inc. (Incorporated by
            reference to Exhibit 4.14 to Amendment No. 1 to the registrant's Registration
            Statement on Form S-3, File No. 33-42650.)
     *5.1  Opinion and consent of Dorsey & Whitney P.L.L.P. as to legality of the
            securities being registered.
</TABLE>

                                      II-2
<PAGE>
   
<TABLE>
<C>        <S>
      8.1  Opinion and consent of Dorsey & Whitney P.L.L.P. as to certain federal income
            tax consequences described in the Joint Proxy Statement/Prospectus.
      8.2  Opinion and consent of Skadden, Arps, Slate, Meagher & Flom as to certain
            federal income tax consequences described in the Joint Proxy
            Statement/Prospectus.
     10.1  Agreement of Merger and Consolidation dated August 6, 1995, by and between First
            Bank System, Inc., and FirsTier Financial, Inc. (Incorporated by reference to
            Exhibit 2.1 to the registrant's Current Report on Form 8-K filed August 17,
            1995, File No. 1-6880.)
     10.2  Stock Option Agreement, dated as of August 6, 1995, between First Bank System,
            Inc. and FirsTier Financial, Inc. (Incorporated by reference to Exhibit 2.2 to
            the registrant's Current Report on Form 8-K filed August 17, 1995, File No.
            1-6880.)
     23.1  Consent of Dorsey & Whitney P.L.L.P. (Included in Exhibits 5.1 and 8.1.)
     23.2  Consent of Skadden, Arps, Slate, Meagher & Flom. (Included in Exhibit 8.2.)
     23.3  Consent of Ernst & Young LLP (relating to financial statements of First Bank
            System, Inc.).
     23.4  Consent of Ernst & Young LLP (relating to financial statements of First
            Interstate Bancorp).
     23.5  Consent of Arthur Andersen LLP (relating to financial statements of FirsTier
            Financial, Inc.).
    +23.6  Consent of J.P. Morgan Securities Inc.
    +23.7  Consent of Goldman, Sachs & Co.
    +23.8  Consent of Morgan Stanley & Co. Incorporated.
    +24.1  Powers of Attorney.
    +99.1  Form of proxy for Special Meeting of shareholders of First Bank System, Inc.
    +99.2  Form of proxy for Special Meeting of shareholders of First Interstate Bancorp.
     99.3  Certificate of Incorporation of First Interstate Bancorp. (Incorporated by
            reference to Exhibit 3.1 to First Interstate Bancorp's Annual Report on Form
            10-K for the year ended December 31, 1989, File No. 1-4114.)
     99.4  Bylaws of First Interstate Bancorp. (Incorporated by reference to First
            Interstate Bancorp's Annual Report on Form 10-K for the year ended December 31,
            1993, File No. 1-4114.)
     99.5  Stock Option Agreement, dated as of November 5, 1995, between First Interstate
            Bancorp and First Bank System, Inc. (Included in Joint Proxy
            Statement/Prospectus as Appendix B.)
     99.6  Stock Option Agreement, dated as of November 5, 1995, between First Bank System,
            Inc. and First Interstate Bancorp. (Included in Joint Proxy Statement/
            Prospectus as Appendix C.)
     99.7  Termination Fee Letter, dated as of November 5, 1995, between First Bank System,
            Inc. and First Interstate Bancorp. (Included in Joint Proxy Statement/
            Prospectus as Appendix D.)
     99.8  Termination Fee Letter, dated as of November 5, 1995, between First Interstate
            Bancorp and First Bank System, Inc. (Included in Joint Proxy
            Statement/Prospectus as Appendix E.)
     99.9  Opinion of J.P. Morgan Securities Inc. (Included in Joint Proxy
            Statement/Prospectus as Appendix F.)
</TABLE>
    

                                      II-3
<PAGE>
   
<TABLE>
<C>        <S>
    99.10  Opinion and letter of Goldman, Sachs & Co. (as revised) (Included in Joint Proxy
            Statement/Prospectus as Appendix G.)
    99.11  Opinions of Morgan Stanley & Co. Incorporated (as revised) (Included in Joint
            Proxy Statement/ Prospectus as Appendix H.)
   *99.12  FBS Repurchase Chart.
   *99.13  Comparison of the Proposed First Bank System, Inc./First Interstate Bancorp
            Merger and the Proposed Wells Fargo & Co. Exchange Offer.
</TABLE>
    

- ------------------------
*To be filed by Amendment.
   
+Previously filed.
    

    (b) Financial Statement Schedules.

        None.

    (c) Reports, Opinions and Appraisals.

   
    The opinions of J.P. Morgan Securities Inc., Goldman, Sachs & Co. and Morgan
Stanley  & Co. Incorporated are included in the Joint Proxy Statement/Prospectus
as Appendices F, G and H, respectively, and referred to above as Exhibits  99.9,
99.10 and 99.11, respectively.
    

                                      II-4
<PAGE>
                                   SIGNATURES

   
    Pursuant  to the requirements of the  Securities Act of 1933, the registrant
has duly caused this Amendment No. 1 to the registration statement to be  signed
on  its behalf  by the  undersigned, thereunto duly  authorized, in  the City of
Minneapolis, State of Minnesota, on December 29, 1995.
    

                                          FIRST BANK SYSTEM, INC.

                                          By        /S/ JOHN F. GRUNDHOFER
                                            ------------------------------------
                                                     John F. Grundhofer
                                               Chairman, President and Chief
                                                     Executive Officer

    Pursuant  to  the  requirements  of   the  Securities  Act  of  1933,   this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

   
<TABLE>
<CAPTION>
                 SIGNATURE AND TITLE                             DATE
- ------------------------------------------------------  -----------------------

<S>                                                     <C>
                /s/ JOHN F. GRUNDHOFER
      ------------------------------------------
                  John F. Grundhofer                       December 29, 1995
 Chairman, President and Chief Executive Officer and
        Director (principal executive officer)

                 /s/ RICHARD A. ZONA
       ----------------------------------------
                   Richard A. Zona,                        December 29, 1995
 Vice Chairman and Chief Financial Officer (principal
                  financial officer)

                 /s/ DAVID J. PARRIN
      ------------------------------------------
                   David J. Parrin,                        December 29, 1995
   Senior Vice President and Controller (principal
                  accounting officer)

                          *
      ------------------------------------------           December 29, 1995
               Roger L. Hale, Director

                          *
      ------------------------------------------           December 29, 1995
             Delbert W. Johnson, Director

                          *
      ------------------------------------------           December 29, 1995
              Norman M. Jones, Director
</TABLE>
    

                                      II-5
<PAGE>
   
<TABLE>
<CAPTION>
                 SIGNATURE AND TITLE                             DATE
- ------------------------------------------------------  -----------------------

<S>                                                     <C>
                          *
      ------------------------------------------           December 29, 1995
              John H. Kareken, Director

                          *
      ------------------------------------------           December 29, 1995
            Richard L. Knowlton, Director

                          *
      ------------------------------------------           December 29, 1995
               Jerry W. Levin, Director

                          *
      ------------------------------------------           December 29, 1995
              Kenneth A. Macke, Director

                          *
      ------------------------------------------           December 29, 1995
             Marilyn C. Nelson, Director

                          *
      ------------------------------------------           December 29, 1995
             Edward J. Phillips, Director

                          *
      ------------------------------------------           December 29, 1995
              James J. Renier, Director

                          *
      ------------------------------------------           December 29, 1995
              S. Walter Richey, Director

                          *
      ------------------------------------------           December 29, 1995
            Richard L. Robinson, Director

                          *
      ------------------------------------------           December 29, 1995
             Richard L. Schall, Director

                          *
      ------------------------------------------           December 29, 1995
             Lyle E. Schroeder, Director

          *By           /s/ DAVID J. PARRIN
        --------------------------------------
                   David J. Parrin,
            Pro se and as Attorney-in-Fact
</TABLE>
    

                                      II-6

<PAGE>
   
                                                                     EXHIBIT 8.1
    

   
                     [DORSEY & WHITNEY P.L.L.P. LETTERHEAD]
    

   
                               December 29, 1995
    

   
First Bank System, Inc.
First Bank Place
601 Second Avenue South
Minneapolis, MN 55402-4302
Dear Ladies and Gentlemen:
    

   
    We  have acted as your counsel in connection with the Registration Statement
on Form S-4 filed on November 20, 1995, and Amendment No. 1 thereto filed on the
date hereof  (the "Registration  Statement") with  the Securities  and  Exchange
Commission  under the Securities Act of 1933, as amended (the "Securities Act").
The Registration  Statement relates  to the  proposed merger  of a  wholly-owned
subsidiary  of First Bank  System, Inc. with and  into First Interstate Bancorp.
This opinion is delivered in accordance with the requirements of Item  601(b)(8)
of the Regulation S-K under the Securities Act.
    

   
    In  connection with  this opinion,  we have  examined and  are familiar with
originals or copies, certified or  otherwise identified to our satisfaction,  of
the  Registration  Statement,  the  Joint  Proxy  Statement/Prospectus  included
therein (the "Joint Proxy Statement/Prospectus") and such other documents as  we
have deemed necessary or appropriate.
    

   
    We    hereby   confirm   that   the   discussions   in   the   Joint   Proxy
Statement/Prospectus under the captions "SUMMARY  -- Certain Federal Income  Tax
Consequences"  and "THE MERGER -- Certain Federal Income Tax Consequences" are a
fair and accurate summary of the  matters addressed therein, based upon  current
law and the facts and assumptions stated or referred to therein. There can be no
assurance  that  contrary positions  may not  be taken  by the  Internal Revenue
Service.
    

   
    We hereby  consent to  the filing  of this  opinion as  Exhibit 8.1  to  the
Registration  Statement and to the use of our name under the caption "THE MERGER
- --   Certain   Federal   Income   Tax   Consequences"   in   the   Joint   Proxy
Statement/Prospectus.  In giving such  consent, we do not  thereby admit that we
are in the category of persons whose consent is required under Section 7 of  the
Securities Act.
    

   
                                          Very truly yours,
    

   
                                          /s/ DORSEY & WHITNEY P.L.L.P.
    

   
BJS
    

<PAGE>
   
                                                                     EXHIBIT 8.2
    

   
               [SKADDEN, ARPS, SLATE, MEAGHER & FLOM LETTERHEAD]
    

   
                               December 29, 1995
    

   
First Interstate Bancorp
633 West Fifth Street
Los Angeles, California 90071
Dear Ladies and Gentlemen:
    

   
    We  have acted as your counsel in connection with the Registration Statement
on Form S-4 filed on November 20, 1995, and Amendment No. 1 thereto filed on the
date hereof  (the "Registration  Statement") with  the Securities  and  Exchange
Commission  under the Securities Act of 1933, as amended (the "Securities Act").
The Registration  Statement relates  to the  proposed merger  of a  wholly-owned
subsidiary  of First Bank  System, Inc. with and  into First Interstate Bancorp.
This opinion is delivered in accordance with the requirements of Item  601(b)(8)
of Regulation S-K under the Securities Act.
    

   
    In  connection with  this opinion,  we have  examined and  are familiar with
originals or copies, certified or  otherwise identified to our satisfaction,  of
the  Registration  Statement,  the  Joint  Proxy  Statement/Prospectus  included
therein (the "Joint Proxy Statement/Prospectus") and such other documents as  we
have deemed necessary or appropriate.
    

   
    We    hereby   confirm   that   the   discussions   in   the   Joint   Proxy
Statement/Prospectus under the captions "SUMMARY  -- Certain Federal Income  Tax
Consequences"  and "THE MERGER -- Certain Federal Income Tax Consequences" are a
fair and accurate summary of the  matters addressed therein, based upon  current
law and the facts and assumptions stated or referred to therein. There can be no
assurance  that  contrary positions  may not  be taken  by the  Internal Revenue
Service.
    

   
    We hereby  consent to  the filing  of this  opinion as  Exhibit 8.2  to  the
Registration  Statement and to the use of our name under the caption "THE MERGER
- --   Certain   Federal   Income   Tax   Consequences"   in   the   Joint   Proxy
Statement/Prospectus.  In giving such  consent, we do not  thereby admit that we
are in the category of persons whose consent is required under Section 7 of  the
Securities Act.
    

   
                                      Very truly yours,
    

   
                                      /s/ SKADDEN, ARPS, SLATE, MEAGHER & FLOM
    

<PAGE>
                                                                    EXHIBIT 23.3

                        CONSENT OF INDEPENDENT AUDITORS

   
We consent to the reference to our firm under the caption "Experts" in the Joint
Proxy  Statement of First Bank System, Inc. and First Interstate Bancorp that is
made a part  of Amendment  No. 1  to the  Registration Statement  (Form S-4  No.
33-64447)  and Prospectus  of First  Bank System,  Inc. for  the registration of
207,480,000 shares of  its common stock  and 1,750,000 shares  of its  preferred
stock  and to the incorporation by reference therein of our report dated January
24, 1995, with respect  to the consolidated financial  statements of First  Bank
System,  Inc. included in  its Current Report  on Form 8-K  dated March 3, 1995,
filed with the Securities and Exchange Commission.
    

   
                                          /s/ ERNST & YOUNG LLP
    

   
Minneapolis, Minnesota
December 29, 1995
    

<PAGE>
                                                                    EXHIBIT 23.4

                        CONSENT OF INDEPENDENT AUDITORS

   
We consent to the reference to our firm under the caption "Experts" in the Joint
Proxy  Statement of First Bank System, Inc. and First Interstate Bancorp that is
made a part  of Amendment  No. 1  to the  Registration Statement  (Form S-4  No.
33-64447)  and Prospectus  of First  Bank System,  Inc. for  the registration of
207,480,000 shares of  its common stock  and 1,750,000 shares  of its  preferred
stock  and to the incorporation by reference therein of our report dated January
16, 1995,  with  respect  to  the consolidated  financial  statements  of  First
Interstate  Bancorp included in its Annual Report (Form 10-K) for the year ended
December 31, 1994, filed with the Securities and Exchange Commission.
    

   
                                          /s/ ERNST & YOUNG LLP
    

   
Los Angeles, California
December 29, 1995
    

<PAGE>
                                                                    EXHIBIT 23.5

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

   
As  independent public  accountants, we hereby  consent to  the incorporation by
reference in  this  Amendment No.  1  to  Form S-4  Registration  Statement  No.
33-64447  of our report dated  August 28, 1995, on  FirsTier Financial, Inc. and
Subsidiaries, included in  First Bank  System, Inc.'s  Amendment No.  1 on  Form
8-K/A  filed August 30, 1995, and to all references to our firm included in this
Registration Statement.
    

/s/ ARTHUR ANDERSEN LLP

   
Omaha, Nebraska
December 29, 1995
    


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