FIRST BANK SYSTEM INC
DEFA14A, 1995-12-13
NATIONAL COMMERCIAL BANKS
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<PAGE>
                            SCHEDULE 14A INFORMATION

                  Proxy Statement Pursuant to Section 14(a) of
            the Securities Exchange Act of 1934 (Amendment No.    )

    Filed by the Registrant /X/
    Filed by a Party other than the Registrant / /

    Check the appropriate box:
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    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14a-6(e)(2))
    / /  Definitive Proxy Statement
    / /  Definitive Additional Materials
    /X/  Soliciting  Material  Pursuant  to  Section  240.14a-11(c)  or  Section
         240.14a-12

                            First Bank System, Inc.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
/X/  $125 per  Exchange Act  Rules 0-11(c)(1)(ii),  14a-6(i)(1), 14a-6(i)(2)  or
     Item 22(a)(2) of Schedule 14A.
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     14a-6(i)(3).
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     and 0-11.
     1) Title of each class of securities to which transaction applies:
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     3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
        filing fee is calculated and state how it was determined):
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<PAGE>
                           [LOGO]

- --------------------------------------------------------------------------------
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                                   COMPARISON
                                     OF THE
        PROPOSED FIRST BANK SYSTEM, INC./FIRST INTERSTATE BANCORP MERGER
                                    AND THE

                   PROPOSED WELLS FARGO & CO. EXCHANGE OFFER

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

                                                               DECEMBER 13, 1995
<PAGE>
    The  participants in this  solicitation may include  First Bank System, Inc.
("FBS"), the directors  of FBS (John  F. Grundhofer, Roger  L. Hale, Delbert  W.
Johnson,  Norman M. Jones, John H. Kareken, Richard L. Knowlton, Jerry W. Levin,
Kenneth A. Macke,  Marilyn C. Nelson,  Edward J. Phillips,  James J. Renier,  S.
Walter  Richey, Richard L.  Robinson, Richard L. Schall  and Lyle E. Schroeder),
Lester Pollack  (Board  Observer)  and  the  following  executive  officers  and
employees  of FBS: Richard A. Zona  (Vice Chairman and Chief Financial Officer),
Philip G. Heasley (Vice  Chairman and President, Retail  Product Group), Lee  R.
Mitau (Executive Vice President, Secretary and General Counsel), Susan E. Lester
(Executive  Vice  President),  Elizabeth A.  Malkerson  (Senior  Vice President,
Corporate Relations), David R. Edstam (Executive Vice President and  Treasurer),
David  J. Parrin (Senior Vice President  and Controller), Arnold C. Hahn (Senior
Vice President, Corporate  Development), Andrew Cecere  (Senior Vice  President,
Management   Accounting  and  Forecasting),  John   R.  Danielson  (Senior  Vice
President, Investor Relations), Wendy Raway (Vice President and Manager of Media
Relations) and Karin Glasgow (Assistant Vice President, Investor Relations).

    FBS and First Interstate Bancorp ("First Interstate" or "FI") are parties to
an Agreement and Plan of Merger, dated as of November 5, 1995, pursuant to which
a wholly owned subsidiary of FBS is to merge with and into First Interstate.  In
addition,  First Interstate has granted to FBS an option to purchase up to 19.9%
of the  outstanding  shares of  common  stock  of First  Interstate  in  certain
circumstances.  As of  October 31,  1995, certain  FBS subsidiaries  held 54,437
shares of First Interstate common stock  in a fiduciary capacity. FBS  disclaims
beneficial  ownership  of shares  of  First Interstate  common  stock held  in a
fiduciary capacity and any other shares held  by any pension plan of FBS or  any
affiliates of FBS.

    As  of  November  30,  1995,  Marilyn C.  Nelson  and  Richard  L. Robinson,
directors of  FBS, held  2,000 shares  and 150  shares, respectively,  of  First
Interstate  common stock.  Lester Pollack is  an executive  officer of Corporate
Advisors, L.P.,  the  general  partner  of  two  shareholders  of  FBS  and  the
investment  manager for another shareholder of FBS. Corporate Advisors, L.P. may
be deemed to be indirectly controlled by  Lazard Freres & Co. LLC, of which  Mr.
Pollack  is a managing director. Lazard Freres & Co. LLC engages in a full range
of investment banking, securities trading, market-making and brokerage  services
for  institutional and individual clients. In the normal course of its business,
Lazard Freres & Co.  LLC may trade  securities of First  Interstate for its  own
account  and the account of its customers and, accordingly, may at any time hold
a long or short position in such securities.

    Although J.P. Morgan Securities Inc.  does not admit that  it or any of  its
directors,  officers, employees or affiliates is  a "participant," as defined in
Schedule 14A  promulgated under  the  Securities Exchange  Act  of 1934  by  the
Securities and Exchange Commission (the "Commission"), or that such Schedule 14A
requires the disclosure of certain information concerning J.P. Morgan Securities
Inc.,  it  may assist  FBS  in this  solicitation.  J.P. Morgan  Securities Inc.
engages in a full range of investment banking, securities trading, market-making
and brokerage services for institutional  and individual clients. In the  normal
course  of its  business, J.P.  Morgan Securities  Inc. may  trade securities of
First Interstate  for its  own account  and the  account of  its customers  and,
accordingly, may at any time hold a long or short position in such securities.

    Except  as  disclosed above,  to  the knowledge  of  FBS, none  of  FBS, the
directors or executive officers of FBS or the employees or other representatives
of FBS named above has any interest, direct or indirect, by security holdings or
otherwise, in First Interstate.
<PAGE>
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            -----
<S>                                                                         <C>
INTRODUCTION..............................................................     4
SUMMARY COMPARISON OF THE MERGER AND THE WELLS OFFER......................     5
COMPARISON OF THE MERGER AND THE WELLS OFFER..............................     9
Value to First Interstate Shareholders....................................     9
  Introduction............................................................     9
  Reported Earnings Per Share Analysis....................................     9
  Wells Fargo's Newfound Optimism.........................................    10
  Goodwill Burden.........................................................    11
  "Cash Earnings Per Share" Analysis......................................    13
  Stock Price Analysis....................................................    14
  Stock Repurchase Program................................................    15
Significant Uncertainties and Potential Delays Associated with the Wells
 Offer....................................................................    15
  Antitrust and Regulatory Uncertainties and Delays.......................    16
  Rights Plan and Section 203 Condition...................................    17
  Minimum Tender Condition................................................    17
  Accounting Treatment....................................................    17
Strategic Advantages......................................................    18
  Introduction............................................................    18
  Efficiency and Growth Prospects.........................................    18
  Market Positions........................................................    20
Risk Elements.............................................................    23
  Capital Structure.......................................................    23
  Geographic Concentration................................................    23
  Business Mix............................................................    23
Technological Advantages..................................................    24
Cost Savings and Associated Revenue Losses................................    25
  Anticipated Expense Reductions..........................................    25
  Sources of Cost Eliminations............................................    26
  Analysis of Net California Savings......................................    29
  Additional Revenue Sources..............................................    32
</TABLE>

                                       3
<PAGE>
                                  INTRODUCTION

    On  November 5, 1995, FBS, First Interstate and a wholly owned subsidiary of
FBS ("Merger  Sub") entered  into a  merger agreement  (the "Merger  Agreement")
pursuant  to which Merger Sub will, upon the terms and subject to the conditions
set forth in  the Merger Agreement,  merge with and  into First Interstate  (the
"Merger"),  with  First  Interstate  surviving  the  Merger  as  a  wholly owned
subsidiary of FBS. As used in this comparison, "New First Interstate" refers  to
FBS  after the Merger. Pursuant to the  Merger, each outstanding share of common
stock, $2.00 par value  ("First Interstate Common  Stock"), of First  Interstate
will  be converted into the right to receive  2.60 shares of common stock of New
First Interstate.

    On November 13, 1995, Wells Fargo  & Co. ("Wells Fargo" or "WFC")  announced
that  it  intended  to  commence  an exchange  offer  for  each  share  of First
Interstate Common Stock (the "Wells Offer"). Pursuant to the Wells Offer,  Wells
Fargo  would exchange two-thirds of a share of Wells Fargo common stock for each
share of First Interstate  Common Stock. The  terms of the  Wells Offer are  set
forth  in a Registration Statement on Form  S-4 filed by Wells Fargo on November
27, 1995 (the "Wells S-4").

    On November 20, 1995, First Interstate announced that its board of directors
(the "First  Interstate  Board") had  determined  by unanimous  vote  (with  two
directors  absent) that the  Wells Offer is  not in the  best interests of First
Interstate  and  its  shareholders.  Accordingly,  the  First  Interstate  Board
recommended  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  comparison contained herein of the  Merger of First Interstate with FBS
and the Wells Offer  includes certain statements and  forecasts with respect  to
anticipated  future  performance  of  First  Interstate,  FBS  and  Wells Fargo.
Although FBS considers such  statements and forecasts  reasonable to the  extent
they  relate to FBS and New First  Interstate, such statements and forecasts are
necessarily based upon estimates and assumptions that are inherently subject  to
significant   economic,  business,   regulatory  and   other  uncertainties  and
contingencies, many of which are beyond  the control of FBS. Certain  statements
and  forecasts of  Wells Fargo  are those presented  by Wells  Fargo in publicly
available documents or  public statements,  and, except as  otherwise set  forth
herein, FBS expresses no opinion with respect thereto. In analyzing the offer of
Wells Fargo described herein, FBS has used estimates and assumptions relating to
Wells  Fargo that differ  from those used  by Wells Fargo  in publicly available
documents or public statements for the reasons set forth herein. Actual  results
may  vary from those  set forth herein,  and such variances  may be material and
adverse. The  independent  auditors of,  and  financial advisors  to,  FBS  have
expressed  no opinion or other form of  assurance with respect to the statements
and forecasts contained herein. The information contained herein should be  read
in conjunction with the Registration Statement on Form S-4 (as amended from time
to  time, the "FBS Registration Statement") filed  by FBS with the Commission on
November 20, 1995.

    THIS COMPARISON DOES NOT CONSTITUTE THE SOLICITATION OF A PROXY BY ANYONE IN
ANY STATE IN WHICH SUCH  SOLICITATION IS NOT AUTHORIZED  OR IN WHICH THE  PERSON
MAKING  SUCH SOLICITATION IS NOT QUALIFIED TO DO  SO OR TO ANY PERSON TO WHOM IT
IS UNLAWFUL TO MAKE SUCH SOLICITATION.

    THE DELIVERY  OF THIS  COMPARISON SHALL  NOT IMPLY  THAT THERE  HAS BEEN  NO
CHANGE  IN THE  INFORMATION SET  FORTH HEREIN  OR IN  THE AFFAIRS  OF FBS, FIRST
INTERSTATE OR WELLS FARGO SINCE THE  DATE HEREOF OR THAT THE INFORMATION  HEREIN
IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.

                                       4
<PAGE>
              SUMMARY COMPARISON OF THE MERGER AND THE WELLS OFFER

    Set  forth below is  FBS's comparison of  the effects of  the Merger and the
Wells Offer from the perspective of  First Interstate and its shareholders.  FBS
believes  that the Merger clearly offers better prospects for growth and creates
superior value  for First  Interstate shareholders  for the  reasons  summarized
below and set forth in detail in the subsequent sections of this document:

    - VALUE.    As  set  forth  more  fully  under  "Value  to  First Interstate
      Shareholders," the Merger provides the superior value to First  Interstate
      shareholders, as demonstrated by the following analyses:

       REPORTED  EARNINGS PER SHARE.  The  earnings per share accretion to First
       Interstate shareholders from the  Merger is projected to  be 24% in  1997
     (the  first full year  of combined operations),  compared with no accretion
     for the  Wells  Offer. Reported  earnings  per  share is  the  most  widely
     accepted  measurement  of  financial performance  under  generally accepted
     accounting principles.  Based upon  current normalized  earnings  multiples
     applied  to  estimated 1997  earnings,  this disparity  translates  into an
     implied purchase price  by FBS  of $156.31  per share  of First  Interstate
     Common  Stock,  compared to  an implied  purchase price  by Wells  Fargo of
     $131.66 per  share  of  First  Interstate  Common  Stock,  resulting  in  a
     differential  of $24.65 per  share. The significant  difference in reported
     earnings per share is in part attributable to the difference in  accounting
     treatment  for the proposed transactions. The  Merger will be accounted for
     under the  pooling-of-interests method  of  accounting, whereas  the  Wells
     Offer  would be accounted for as a purchase. As a result, Wells Fargo would
     penalize future earnings of the combined  entity with more than $8  billion
     in  additional goodwill and other intangibles. The enormous goodwill burden
     of  the  combined  entity  would   depress  future  reported  earnings   by
     approximately  $400  million per  year  after taxes,  reduce  Wells Fargo's
     financial flexibility  in an  economic  downturn, potentially  limit  Wells
     Fargo's  ability to do future acquisitions  and will therefore likely be of
     concern to investors and receive close scrutiny by regulators.  Conversely,
     in   the   Merger,   First  Interstate   shareholders   benefit   from  the
     pooling-of-interests accounting treatment of the Merger.

       "CASH EARNINGS PER SHARE."  Although FBS believes that reported  earnings
       per   share  constitutes   the  most  meaningful   measure  of  financial
     performance, the  Merger is  also  superior to  the  Wells Offer  based  on
     estimated  "cash  earnings  per  share"  (earnings  before  amortization of
     goodwill and  other intangibles),  the measurement  methodology favored  by
     Wells  Fargo. Under this analysis, the Merger provides an expected 15%, 25%
     and  25%  "cash   earnings  per  share"   accretion  to  First   Interstate
     shareholders  in 1996, 1997  and 1998, respectively, as  opposed to 9%, 21%
     and 24% for  the Wells  Offer. The  accretion analysis  presented by  Wells
     Fargo  in the Wells S-4 is misleading  because of its focus on the relative
     benefits of the two  transactions to shareholders of  FBS and Wells  Fargo,
     instead  of  to  First  Interstate  shareholders.  Further,  Wells  Fargo's
     analysis of future earnings uses mutually exclusive assumptions that  raise
     serious questions about its future stock price.

       EFFECT  OF RECENT WELLS  FARGO DISCLOSURES.   On December 6  and 7, 1995,
       Wells  Fargo  made  presentations  that  led  many  analysts  to  project
     aggressive  1996  growth rates  for Wells  Fargo, thereby  increasing Wells
     Fargo's estimated earnings  per share  for 1996. The  analyses of  reported
     earnings  per  share and  "cash earnings  per share"  set forth  above give
     effect to the  revised Wall Street  estimates arising out  of the  asserted
     higher growth rates. However, these revised estimates are inconsistent with
     the  past  performance  of  Wells Fargo  and  FBS  believes  such estimates
     overstate the  future  prospects of  Wells  Fargo. Accordingly,  the  value
     advantages  inherent in  the Merger demonstrated  above would  be even more
     pronounced using what FBS believes to be more realistic earnings  estimates
     for Wells Fargo. For example, using such estimates, as more fully described
     herein (see "Value to First Interstate Shareholders--Wells Fargo's Newfound
     Optimism"),  the Wells  Offer would  result in  dilution of  4% in reported
     earnings per share and accretion of  only 17% in "cash earnings per  share"
     in 1997 to First

                                       5
<PAGE>
     Interstate  shareholders. In FBS's  view, skepticism with  respect to Wells
     Fargo's recent growth projections  is especially warranted  in view of  the
     reported  admissions by Wells Fargo executives regarding its limited growth
     environment.

    - SIGNIFICANT UNCERTAINTIES AND POTENTIAL  DELAYS ASSOCIATED WITH THE  WELLS
      OFFER.    The Wells  Offer  involves a  number  of uncertainties  that FBS
      believes could  cause  potential  delays  not faced  in  the  Merger.  FBS
      believes  the divestitures  that will be  required in  connection with the
      Wells Offer will significantly  exceed the levels  assumed by Wells  Fargo
      and that achieving the required divestitures may entail substantial delays
      that  will not be  encountered in connection with  the Merger. Wells Fargo
      concedes in its  application to  the Federal  Reserve Board  that it  must
      divest  approximately $900  million in  deposits to  alleviate the adverse
      competitive effects that would arise out of any consummation of the  Wells
      Offer.  This figure  apparently assumes  that thrift  institutions will be
      given  a  50%  weighting  for  competitive  purposes.  FBS  believes  that
      California  thrifts are not  large suppliers of  business banking services
      and, therefore, should be given  less effect in assessing the  competitive
      impact  of the Wells  Offer. If thrifts  were weighted at  20% rather than
      50%, for example,  Wells Fargo's required  divestitures would  approximate
      $2.3   billion   in   approximately  20   separate   markets.  Substantial
      divestitures would require increased time  to locate buyers and  negotiate
      sales,  particularly  if  Wells  Fargo  seeks  to  divest  some  of  First
      Interstate's existing  branches that  Wells Fargo  does not  control.  The
      Merger involves minimal divestitures and therefore would not be subject to
      these   potential   delays.   As   discussed   below   under  "Significant
      Uncertainties   and   Potential   Delays   Associated   with   the   Wells
      Offer--Antitrust  and  Regulatory  Uncertainties  and  Delays,"  in  large
      transactions announced in 1995, the  time from public announcement of  the
      transaction  to regulatory approval for transactions involving substantial
      divestitures was significantly longer than for transactions which did  not
      involve  such divestitures. Wells Fargo has  also announced plans to close
      85% of  First  Interstate's  branches in  California.  In  several  recent
      transactions   that  involved   large  branch   overlaps  and  significant
      divestitures and/or potential branch closings,  such as would result  from
      the  Wells Offer, the Federal Reserve Board has ordered public hearings to
      consider the effect of the transaction on the convenience and needs of the
      communities to be served and the performance of the institutions under the
      Community Reinvestment  Act.  The  process of  scheduling  and  conducting
      regulatory  hearings and  receiving and reviewing  testimony has generally
      extended the period of  time for regulatory  consideration of the  related
      transactions. Although the Federal Reserve Board has not indicated that it
      will  hold  hearings in  connection  with either  the  Wells Offer  or the
      Merger,  the  Merger,  unlike  the  Wells  Offer,  does  not  involve  any
      significant  branch overlaps,  divestitures or branch  closings. The Wells
      Offer is also subject to  other substantial uncertainties, conditions  and
      contingencies  which could adversely affect the Wells Offer and the timing
      thereof. These concerns include the First Interstate "poison pill"  rights
      plan,  certain  antitakeover  provisions  of Delaware  law  and  the 62.7%
      minimum tender condition of the Wells Offer. The Merger is not subject  to
      these  uncertainties. See "Significant  Uncertainties and Potential Delays
      Associated with the Wells Offer."

    - STRATEGIC ADVANTAGES.    FBS  is  the best  strategic  partner  for  First
      Interstate  in terms of building shareholder value. The Merger will create
      significant  opportunities  for  efficiency,   revenue  growth  and   risk
      diversification.  The Merger also offers First Interstate shareholders the
      opportunity to participate in the expected future growth of FBS and  First
      Interstate.  FBS  has  built  its franchise  by  investing  in technology,
      expanding its core businesses and creating  a culture in which day to  day
      operations   are  consistently   evaluated  with  a   view  to  maximizing
      shareholder value.  FBS believes  the  combined company  can  successfully
      implement  these strategies at New  First Interstate following the Merger.
      See "Strategic Advantages." The following are highlights of the  strategic
      advantages of the Merger to First Interstate shareholders:

        - Because of its proven centralized approach to multi-state banking, FBS
          is one of the most efficient banks in the country.

                                       6
<PAGE>
        - FBS  has considerably  expanded its  businesses in  recent years, both
          through internal  growth  and through  acquisitions,  especially  when
          compared  with Wells Fargo. In the  last three years, FBS has achieved
          12%  annualized  growth  in  loans  and  10.8%  annualized  growth  in
          non-interest  income, compared  with 1.2% and  8.5%, respectively, for
          Wells Fargo. This  growth has contributed  to increases in  annualized
          net income to common shares and earnings per share of 22.2% and 22.1%,
          respectively,  since the  beginning of  1993, as  opposed to  5.0% and
          11.6% for Wells Fargo.

        - The combination of First Interstate and FBS will result in one of  the
          leading  financial institutions  in several  high growth,  high return
          businesses, including consumer credit cards, corporate and  purchasing
          card  services, card-accessed  secured and unsecured  lines of credit,
          automatic teller  machines and  merchant processing,  corporate  trust
          services and asset management.

        - New  First Interstate will be ranked as one of the top three financial
          institutions in terms of market share  in 11 states. A combination  of
          Wells  Fargo and First Interstate would achieve such a ranking in only
          four states (three  of which are  attributable to the  pre-combination
          rankings of First Interstate).

        - New   First  Interstate  will  be  one  of  the  top  three  financial
          institutions in terms of market share in 39 major metropolitan areas.

    - RISK ELEMENTS.    Completion  of  the  Wells  Offer  would  result  in  an
      institution  with a much higher risk  profile than New First Interstate in
      terms of capital structure, geographic concentration, business  operations
      and  diversification.  An  entity  comprised  of  Wells  Fargo  and  First
      Interstate would  have the  most goodwill  and other  intangibles and  the
      highest  ratio of  total goodwill  and other  intangibles to  equity among
      large regional banks. Consummation of the Wells Offer would generate  more
      than $8 billion of additional goodwill and other intangibles and result in
      a  ratio  of goodwill  and  other intangibles  to  equity of  65%  for the
      combined  entity.   Such  entity   would  also   be  overly   concentrated
      geographically,  with approximately 70% of its total assets and 78% of its
      real estate loan assets located in California. In addition, Wells Fargo is
      pursuing a retail  strategy that will  attempt to force  its customers  to
      abandon  traditional  branch  banking  in  what  FBS  believes  to  be  an
      unrealistic time frame.  Moreover, the  revenue stream of  Wells Fargo  is
      highly dependent on real estate lending, one of the most volatile segments
      of the banking business. See "Risk Elements."

    - TECHNOLOGICAL ADVANTAGES.  FBS's technological advantages will allow it to
      integrate the operations of First Interstate with its own in one-sixth the
      amount  of time estimated by Wells Fargo to be required in connection with
      its integration  of  First  Interstate's  operations.  As  a  result,  the
      management  and other  employees of New  First Interstate will  be able to
      more quickly combine operations, enabling New First Interstate to  realize
      cost  savings net of  revenue reductions of  approximately $250 million in
      1996 compared with FBS's estimate of $150 million for Wells Fargo.  Unlike
      Wells Fargo, FBS currently employs centralized, multi-state operations and
      information  systems compatible with those  of First Interstate. Moreover,
      FBS has a proven  ability to quickly  and efficiently integrate  companies
      with  multi-state  operations, and  the  compatibility of  its information
      systems with those of First Interstate  should enable FBS to realize  cost
      savings  more  quickly  and  minimize  service  disruptions  and  customer
      inconvenience. Wells Fargo, on the other  hand, has not attempted a  major
      bank  acquisition in nearly a decade and  has never integrated a bank with
      substantial  operations   outside   of  California.   See   "Technological
      Advantages."

    - COST  TAKEOUT AND REVENUE  IMPACT.  FBS expects  to achieve annual savings
      net of  revenue  reductions  of approximately  $500  million  through  the
      combination  of FBS and First Interstate. FBS's projections are achievable
      and  are   based   upon   realistic,   reasonable   assumptions   reflect-
     ing  FBS's  access  to  First  Interstate's  books  and  records  and FBS's
      extensive acquisition experience. Wells Fargo has significantly overstated
      the cost eliminations and understated the

                                       7
<PAGE>
      revenue losses  that  could reasonably  be  expected to  result  from  the
      consummation  of the  Wells Offer. Despite  the relative  advantage of the
      overlap between Wells Fargo and  First Interstate in California, FBS  does
      not believe that Wells Fargo can realistically expect to realize more than
      $600 million of annual savings net of revenue reductions through the Wells
      Offer  before intangible amortization.  In fact, when  the heavy burden of
      the amortization of more than $8 billion of additional goodwill and  other
      intangibles  is  taken into  account, FBS  has a  net annual  advantage of
      approximately  $250  million  in  after-tax  earnings.  In  addition,  the
      significantly  greater divestitures that FBS  believes will be required in
      connection with  the Wells  Offer will  result in  significant  additional
      revenue losses. See "Cost Savings and Associated Revenue Losses."

    - WELLS  FARGO'S  SERIES OF  QUESTIONABLE  ASSUMPTIONS.   In  evaluating the
      arguments advanced by  Wells Fargo in  support of the  Wells Offer,  First
      Interstate  shareholders need  to consider  carefully whether  each of the
      questionable (and,  in FBS's  view, unjustified)  assumptions employed  by
      Wells  Fargo  can be  believed. Perhaps  the most  questionable assumption
      advanced by Wells Fargo is that the investment community will accept Wells
      Fargo's unorthodox reliance on "cash  earnings per share" as the  critical
      measure  of  financial  performance,  and  ignore  the  massive  amount of
      goodwill and associated amortization generated by the purchase  accounting
      treatment required in connection with the Wells Offer. See "Value to First
      Interstate  Shareholders--'Cash Earnings Per Share' Analysis." In terms of
      projected cost  takeouts,  Wells Fargo  has  asserted it  can  double  the
      savings  advanced by FBS  with respect to the  Merger, despite having only
      the "California  overlap"  advantage.  See "Cost  Savings  and  Associated
      Revenue  Losses--Analysis  of  Net California  Savings."  Similarly, Wells
      Fargo's assumed  amount  of  required  asset  divestitures  is  less  than
      one-half  of the amount FBS estimates would be required in order for Wells
      Fargo to secure regulatory approval  of the Wells Offer. See  "Significant
      Uncertainties  and  Potential  Delays Associated  with  the  Wells Offer."
      Moreover, in FBS's view, the Wells Fargo stock repurchase assumptions  and
      related earnings projections are internally inconsistent and do not appear
      to   be   achievable,  as   discussed  in   "Value  to   First  Interstate
      Shareholders--Stock Price Analysis." Most recently, Wells Fargo  announced
      certain   projections,  which  FBS  believes   are  based  on  exaggerated
      assumptions,  such  as  a  substantial  decrease  in  traditional   branch
      distribution  capacity by the end  of 1996 and a  dramatic increase in net
      interest income despite flat results in recent years. Wall Street analysts
      that revised earnings estimates based on the recently revised Wells  Fargo
      projections  increased  their  earnings  estimate  by  an  average  of 8%,
      resulting in turn in a substantial increase in Wells Fargo's stock  price.
      See  "Value  to  First  Interstate  Shareholders--Wells  Fargo's  Newfound
      Optimism." Even if an investor were  to be persuaded by portions of  Wells
      Fargo's  arguments,  FBS believes  it is  implausible that  investors will
      accept all of these  assumptions, as is necessary  in order to agree  with
      the value attributed to the Wells Offer by Wells Fargo.

                                       8
<PAGE>
                  COMPARISON OF THE MERGER AND THE WELLS OFFER

    The  following discussion compares  the Merger and the  Wells Offer from the
perspective of  the shareholders  of First  Interstate, an  analysis that  Wells
Fargo has, for reasons that will become apparent, in large part avoided.

VALUE TO FIRST INTERSTATE SHAREHOLDERS

    INTRODUCTION.   Wells Fargo consistently fails to analyze the Merger and the
Wells Offer from the perspective of First Interstate shareholders. For  example,
the  accretion analysis presented in the  Wells S-4 is irrelevant and misleading
to First Interstate shareholders in that it intentionally focuses on the effects
of the  Wells  Offer on  Wells  Fargo shareholders  and  of the  Merger  on  FBS
shareholders,  not on the accretion to  First Interstate shareholders that would
result from the two transactions. As discussed below, the Merger is expected  to
be  significantly more accretive to First Interstate shareholders than the Wells
Offer on an earnings per share basis. The Merger is also more accretive to First
Interstate shareholders on the  "cash earnings per  share" approach advanced  by
Wells  Fargo as part  of its attempt  to ignore the  negative impact on earnings
that will result from the enormous  goodwill expense that the Wells Offer  would
generate.

    REPORTED  EARNINGS PER  SHARE ANALYSIS.   The  Merger provides  the superior
value to  First Interstate  shareholders based  on reported  earnings per  share
(determined  in accordance  with generally accepted  accounting principles), the
most widely  accepted measurement  of financial  performance. As  is more  fully
described  below,  based  on current  1996  Wall Street  consensus  estimates of
normalized earnings  per share  for FBS  and Wells  Fargo, the  Merger  produces
superior earnings per share accretion to First Interstate shareholders of 14% in
1996  and 24% in  each of 1997 and  1998. In contrast, the  Wells Offer would be
dilutive to First Interstate shareholders by 10% in 1996, neutral in 1997 and 5%
accretive in  1998.  These projections  assume  annual savings  net  of  revenue
reductions  of $600 million in connection with  the Wells Offer and $500 million
of net cost savings as a result of the Merger. See "Cost Savings and  Associated
Revenue  Losses."  Although FBS  believes such  estimates to  be unrealistically
optimistic, the  Wells Fargo  reported earnings  per share  estimates  described
above  are  based on  the recent  aggressive  growth projections  resulting from
presentations made by Wells Fargo to investors and analysts on December 6 and 7,
1995. As  shown  below under  "Alternative  Case Estimates,"  FBS  believes  the
accretion  to First Interstate shareholders under  the Wells Offer would be even
less attractive  using  what  FBS  believes to  be  more  realistic  assumptions
regarding  Wells Fargo's future growth. In  this scenario, the Wells Offer would
be dilutive to First  Interstate shareholders by  12% and 4%  in 1996 and  1997,
respectively, and accretive by only 1% in 1998.

                                       9
<PAGE>
              ESTIMATED REPORTED EARNINGS PER SHARE COMPARISON (A)
FIRST INTERSTATE SHAREHOLDER PERSPECTIVE

<TABLE>
<CAPTION>
                                                                       THE WELLS OFFER
                                                              CONSENSUS              ALTERNATIVE
                                    THE MERGER (B)          ESTIMATES (B)         CASE ESTIMATES (C)
                                 1996    1997    1998    1996    1997    1998    1996    1997    1998
                                ------  ------  ------  ------  ------  ------  ------  ------  ------
<S>                             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
First Interstate base EPS.....  $10.99  $12.53  $14.31  $10.99  $12.53  $14.31  $10.99  $12.53  $14.31
Post-acquisition EPS..........  $12.50  $15.61  $17.74  $ 9.90  $12.59  $15.09  $ 9.62  $12.07  $14.50
Accretion/(dilution) to First
 Interstate shareholders......   14%     24%     24%    (10)%     --      5%    (12)%    (4)%     1%
</TABLE>

FBS/WELLS FARGO SHAREHOLDER PERSPECTIVE

<TABLE>
<CAPTION>
                                                                     WFC/THE WELLS OFFER
                                                              CONSENSUS              ALTERNATIVE
                                  FBS/THE MERGER (B)        ESTIMATES (B)         CASE ESTIMATES (C)
                                 1996    1997    1998    1996    1997    1998    1996    1997    1998
                                ------  ------  ------  ------  ------  ------  ------  ------  ------
<S>                             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
Base EPS......................  $ 4.60  $ 5.15  $ 5.75  $18.75  $20.99  $23.44  $17.25  $19.31  $21.56
Post-acquisition EPS..........  $ 4.81  $ 6.00  $ 6.82  $15.28  $18.88  $22.64  $14.48  $18.10  $21.75
Accretion/(dilution) to
 acquiror shareholders........    5%     17%     19%    (18)%   (10)%    (3)%   (16)%    (6)%     1%
</TABLE>

- ------------------------------
(a) Assumes that (i) each transaction is consummated on March 31, 1996, (ii) the
    $500  million in  cost savings  net of  revenue reductions  for FBS  will be
    phased in at $250 million, $500 million  and $500 million in 1996, 1997  and
    1998,  respectively,  and (iii)  the  $600 million  in  cost savings  net of
    revenue reductions for  Wells Fargo  will be  phased in  on a  straight-line
    basis  over  the assumed  18 month  integration  period ($150  million, $450
    million and  $600  million  in  1996,  1997  and  1998,  respectively).  The
    after-tax  benefit of the  cost savings net  of revenue reductions projected
    for each transaction is assumed to be applied to the repurchase of shares in
    each case presented. Amortization of goodwill and other intangibles  related
    to  the Wells Offer is  estimated to be $423  million annually ($6.8 billion
    amortized over 25 years and $1.5 billion amortized over 10 years).

(b) Wells Fargo and First Interstate base EPS are adjusted for a normalized loan
    loss provision ($320 million  in 1996 for Wells  Fargo, as described in  its
    November 13, 1995 analyst presentation, and 50 basis points of average loans
    for  First Interstate).  Earnings per  share is  based on  brokerage analyst
    estimates, published by First Call  Corporation ("First Call"), for 1996  as
    of  December 12, 1995  for FBS. Estimates  for Wells Fargo  are based on the
    average, as reported by First Call, of the nine analyst estimates that  were
    updated  between  December  7,  1995 and  December  12,  1995.  Estimates of
    earnings per share for FBS and Wells Fargo for 1997 and 1998 were derived by
    applying an  approximately  12% annual  growth  rate to  1996  estimates  of
    earnings  per share. First  Interstate earnings per share  are assumed to be
    $10.99 in 1996  and First Interstate  earnings estimates for  1997 and  1998
    were  derived by  applying an approximately  14% annual growth  rate to 1996
    estimated earnings.  The estimates  referred  to in  this footnote  (b)  are
    herein referred to as the "Consensus Estimates."

(c)  Earnings per share for 1996 is based  on FBS's view of a realistic earnings
    estimate (the "Alternative Case Estimate") for Wells Fargo, including a loan
    loss provision of approximately $300 million (or 80 basis points of  average
    loans).  Estimated  earnings per  share for  1997 and  1998 were  derived by
    applying an approximately  12% annual  growth rate to  the 1996  Alternative
    Case Estimate of Wells Fargo's 1996 earnings per share.

    Even using Wells Fargo's assumption that it can achieve $400 million more in
net  cost reductions  than FBS,  which FBS believes  is not  credible (see "Cost
Savings and Associated Revenue Losses"), applying the Consensus Estimates to the
Wells Offer would  result in First  Interstate shareholders receiving  accretion
amounts  inferior to those associated  with the Merger (6%  dilution in 1996 and
accretion of 9% in 1997 and 16% in 1998).

    WELLS FARGO'S NEWFOUND OPTIMISM.   For a number  of compelling reasons,  FBS
believes  the Alternative Case  Estimates are more  realistic than the Consensus
Estimates and should be the  focus of the analysis  from the viewpoint of  First
Interstate  shareholders. After  a number  of reported  admissions regarding its
limited growth environment  (see "Strategic  Advantages"), and  within weeks  of
presenting  the Wells Offer based on  earlier analysts' estimates, on December 6
and 7, 1995, Wells Fargo

                                       10
<PAGE>
conveniently scheduled its first New York  analyst meetings in years to  discuss
its  newfound  optimism regarding  its  business prospects.  FBS  believes these
meetings were  calculated attempts  to  manipulate the  price of  Wells  Fargo's
common  stock and  interfere with  the Merger.  The meetings  had the  effect of
increasing the  Consensus Estimates  regarding Wells  Fargo, and  the  perceived
value  of  the  Wells  Offer,  by  approximately  8%.  FBS  believes  that First
Interstate shareholders would  be well  advised to view  Wells Fargo's  recently
asserted growth prospects with a high degree of skepticism.

    The  following analysis  of Wells  Fargo's recent  presentation is  based on
published analyst reports. Total revenue in the new Wells Fargo presentation  is
projected  to increase by 8% in 1996,  despite the fact that Wells Fargo's total
revenues have increased by only 2.5% annually since 1993. The 8% revenue  growth
was  attributed in turn to 5% growth in  Wells Fargo's net interest income and a
12% increase in its noninterest income.

    A 5% growth in net interest income  is, at best, implausible in view of  the
fact  that Wells Fargo has been unable to achieve any net interest income growth
over the last two  years. Wells Fargo's annualized  1995 net interest income  is
essentially  flat with 1993  levels. In addition,  such aggressive growth levels
would seem difficult to achieve in light of the current negative industry trends
affecting net  interest  income,  such  as  deposit  pricing  pressures  and  an
increasingly  competitive loan  pricing environment  in both  the commercial and
consumer markets. Also,  the cost  of funding the  significant stock  repurchase
program  announced  by  Wells Fargo  would  further increase  the  difficulty of
achieving these projected growth  levels. A supposed basis  for the claimed  net
interest  income  growth  is the  Wells  Fargo national  small  business lending
strategy. However, small business loans constitute less than 6% of Wells Fargo's
total assets, and so it is difficult to see how this consideration could account
for the net interest income levels predicted by Wells Fargo. In fact, even a 20%
growth in Wells  Fargo's small business  loan portfolio would  be offset by  the
negative  impact on net  interest income of  the funding costs  for the expected
1996 Wells Fargo stock repurchases.

    The 12% projected growth in Wells Fargo's noninterest income is also suspect
in light of Wells Fargo's announced decision to exit two fee-generating lines of
business,  mortgage  banking  and  its  Wells  Fargo-Nikko  investment  advisory
business.

    Finally,  the projected  revenue growth must  be achieved  while Wells Fargo
expects to  be  executing  a  high  risk  strategy  of  rapidly  downsizing  its
traditional  branch network. Wells Fargo's projections assume a reduction in the
percentage of its outlets that are  traditional branches from the current  level
of  94% of  total outlets  to 28%  by the  end of  1996. Such  a strategy, which
abruptly deprives  many  customers  of  their  principal  means  of  transacting
business  with their bank, should be expected to result in the loss of customers
and associated revenue.

    In view  of  the  problematic  nature  of  the  newly  revised  Wells  Fargo
estimates,  FBS believes First  Interstate shareholders should  focus instead on
the Alternative Case Estimates prepared  by FBS. The Alternative Case  Estimates
assume total revenue growth of 3%, which is still above Wells Fargo's historical
levels.  The components of this  growth are made up  of 9% growth in noninterest
income and a flat  level of net interest  income, consistent with Wells  Fargo's
historical  results. The  result of  these assumptions  is a  1996 pre-provision
earnings per share  estimate of $21.00  ($17.25 normalized for  loan losses)  or
$1.80  per share  lower than the  Consensus Estimates. In  fact, the Alternative
Case Estimates for 1996 are consistent with the prevailing First Call  consensus
estimates for Wells Fargo prior to the December 6 and 7, 1995 analyst meetings.

    GOODWILL   BURDEN.    In  an  attempt  to  divert  the  attention  of  First
Interstate's shareholders from  the substantial goodwill  and other  intangibles
and  the related negative  impact on earnings  that would result  from the Wells
Offer, Wells Fargo has downplayed estimates  of reported earnings per share  and
has  instead focused  on projected  "cash earnings  per share"  (earnings before
amortization of goodwill and other intangibles). It is unrealistic to think that
the investment community will ignore reported earnings per share and performance
ratios  when  analyzing  performance  and  determining  stock  values.  Reported
earnings  per share is the most widely accepted measure of financial performance
and must be disclosed by all publicly-held companies. "Cash earnings per  share"
are neither routinely

                                       11
<PAGE>
reported  nor readily  available. In  fact, the  Commission actively discourages
such reporting. As the Commission stated  in Accounting Series Release No.  142,
"per share data other than that relating to net income, net assets and dividends
should   be  avoided   in  reporting   financial  results."   By  ignoring  this
consideration, First Interstate shareholders risk a negative market reaction  to
the sharp decline in Wells Fargo's reported earnings per share growth that would
occur following any consummation of the Wells Offer.

    As  stated by  Nancy A. Bush,  CFA, of  Brown Brothers Harriman  & Co.: "The
crucial difference in our mind remains the accounting method; the pooling method
to be used in  the First Bank System  deal is clearly superior  in a deal  where
price-to-book  value  approaches 3X  and a  massive amount  of goodwill  will be
created by the purchase method which Wells  Fargo will be forced to use. No,  we
do not buy the argument that the market will simply ignore low reported earnings
or  a low ROE for the supposed  attractiveness of cash flow accounting. Our view
remains that  Wells Fargo,  precluded  from doing  a  pooling by  the  financial
engineering  in which  it has been  engaged for  the last few  years, has simply
chosen an argument which bolsters a high price for an equity base which it  then
will actively work to liquidate."(1)

    The  increase in  goodwill associated with  consummation of  the Wells Offer
will also result  in a significant  negative impact upon  the combined  entity's
return  on assets and return on equity,  which are also widely followed measures
of financial  performance.  The  following table  compares  these  key  industry
performance  ratios on a pro forma basis for the combination of First Interstate
with each of FBS and Wells Fargo for the quarter ended September 30, 1995:

                           KEY PERFORMANCE RATIOS (A)

<TABLE>
<CAPTION>
                                                                                        FIRST
                                                                                      INTERSTATE    FBS/FI @      WFC/FI @
                                                                                         BASE         2.60          .667
                                                                                     ------------  -----------  ------------
<S>                                                                                  <C>           <C>          <C>
Return on assets...................................................................        1.56%        2.09%         1.54%
Return on equity...................................................................        23.2%        28.0%         11.8%
</TABLE>

- ------------------------------
(a)  For the  quarter ended  September 30,  1995. Assumes  normalized loan  loss
     provision  ($320  million annually  for Wells  Fargo,  as described  in its
     November 13, 1995 analyst  presentation, and 50  basis points annually  for
     First  Interstate)  and  full  phase-in  of  cost  savings  net  of revenue
     reductions of  $500 million  for  FBS and  $600  million for  Wells  Fargo.
     Amortization  of goodwill and other intangibles  related to the Wells Offer
     is estimated to be  $423 million annually ($6.8  billion amortized over  25
     years and $1.5 billion amortized over 10 years).

    Goodwill amortization charges will also negatively affect earnings per share
growth.  Assuming  a  1995 normalized  earnings  per  share of  $9.72  for First
Interstate, the following  table compares  earnings per share  growth for  First
Interstate shareholders based on the Merger and the Wells Offer:

                    ESTIMATED EARNINGS PER SHARE GROWTH (A)

<TABLE>
<CAPTION>
                                                                                             THE WELLS OFFER
                                                              FIRST                  --------------------------------
                                                           INTERSTATE       THE        CONSENSUS       ALTERNATIVE
                                                            BASE (B)    MERGER (B)   ESTIMATES (B)  CASE ESTIMATES(C)
                                                           -----------  -----------  -------------  -----------------
<S>                                                        <C>          <C>          <C>            <C>
1996 EPS.................................................   $   10.99    $   12.50     $    9.90        $    9.62
Growth...................................................       13.1%        28.6%          1.9%             (1.0)%
</TABLE>

- ------------------------------
(a)  Wells  Fargo and  First Interstate base  EPS are adjusted  for a normalized
     loan loss provision  ($320 million  for Wells  Fargo, as  described in  its
     November  13,  1995  analyst presentation  and  50 basis  points  for First
     Interstate). Assumes consummation of each of the transactions on March  31,
     1996 and net cost takeouts in 1996 of $250 million for FBS and $150 million
     for  Wells Fargo. Amortization of goodwill and other intangibles related to
     the Wells Offer  is estimated  to be  $423 million  annually ($6.8  billion
     amortized over 25 years and $1.5 billion amortized over 10 years).
(b)  Based on the Consensus Estimates.
(c)  Based on the Alternative Case Estimates.

- ------------------------
(1) Reprinted herein from "First Bank System," dated November 28, 1995, with the
    consent of the author.

                                       12
<PAGE>
     "CASH  EARNINGS PER SHARE"  ANALYSIS.  Although  FBS believes that reported
earnings  per  share  constitutes  the  most  meaningful  measure  of  financial
performance,  the Merger is also superior to  the Wells Offer based on estimated
"cash earnings per share," the  measurement methodology favored by Wells  Fargo,
as demonstrated in the following chart:

               ESTIMATED "CASH EARNINGS PER SHARE" COMPARISON (A)
FIRST INTERSTATE SHAREHOLDER PERSPECTIVE

<TABLE>
<CAPTION>
                                                                       THE WELLS OFFER
                                                              CONSENSUS              ALTERNATIVE
                                    THE MERGER (B)          ESTIMATES (B)         CASE ESTIMATES (C)
                                 1996    1997    1998    1996    1997    1998    1996    1997    1998
                                ------  ------  ------  ------  ------  ------  ------  ------  ------
<S>                             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
First Interstate base cash
 EPS..........................  $11.81  $13.40  $15.23  $11.81  $13.40  $15.23  $11.81  $13.40  $15.23
Post-acquisition cash EPS.....  $13.63  $16.81  $19.02  $12.89  $16.18  $18.92  $12.62  $15.66  $18.34
Accretion to First Interstate
 shareholders.................   15%     25%     25%      9%     21%     24%      7%     17%     20%
</TABLE>

FBS/WELLS FARGO SHAREHOLDER PERSPECTIVE

<TABLE>
<CAPTION>
                                                                     WFC/THE WELLS OFFER
                                                              CONSENSUS              ALTERNATIVE
                                  FBS/THE MERGER (B)        ESTIMATES (B)         CASE ESTIMATES (C)
                                 1996    1997    1998    1996    1997    1998    1996    1997    1998
                                ------  ------  ------  ------  ------  ------  ------  ------  ------
<S>                             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
Base cash EPS.................  $ 5.20  $ 5.75  $ 6.36  $20.22  $22.53  $25.04  $18.72  $20.85  $23.16
Post-acquisition cash EPS.....  $ 5.24  $ 6.47  $ 7.32  $19.83  $24.27  $28.38  $19.03  $23.49  $27.50
Accretion to acquiror
 shareholders.................    1%     13%     15%     (2)%     8%     13%      2%     13%     19%
</TABLE>

- ------------------------------
(a)  Assumes  that (i) each  transaction is consummated on  March 31, 1996, (ii)
     the $500 million in cost savings net of revenue reductions for FBS will  be
     phased  in at $250 million, $500 million and $500 million in 1996, 1997 and
     1998, respectively,  and (iii)  the $600  million in  cost savings  net  of
     revenue  reductions for  Wells Fargo will  be phased in  on a straight-line
     basis over  the assumed  18 month  integration period  ($150 million,  $450
     million  and  $600  million  in 1996,  1997  and  1998,  respectively). The
     after-tax benefit of the cost  savings net of revenue reductions  projected
     for  each transaction is assumed to be  applied to the repurchase of shares
     in each case presented.

(b)  Based on the Consensus Estimates.

(c)  Based on the Alternative Case Estimates.

                                       13
<PAGE>
     STOCK PRICE ANALYSIS.  The superiority  of the Merger in terms of  earnings
per  share translates directly  to shareholder value.  The following table shows
the implied purchase  price to  First Interstate shareholders  of the  competing
offers  based  on  projected 1997  reported  earnings per  share  using current,
normalized earnings multiples for FBS and Wells Fargo:

                             IMPLIED PURCHASE PRICE

<TABLE>
<CAPTION>
                                                                                             THE WELLS OFFER
                                                                                       ---------------------------
                                                                               THE      CONSENSUS    ALTERNATIVE
                                                                             MERGER     ESTIMATES   CASE ESTIMATES
                                                                            ---------  -----------  --------------
<S>                                                                         <C>        <C>          <C>
1997 estimated reported EPS (a)...........................................  $    6.00   $   18.88     $    18.10
Current multiple of estimated 1997 earnings (b)...........................      10.02       10.46          10.46
                                                                            ---------  -----------  --------------
Implied current price.....................................................      60.12      197.48         189.33
Exchange ratio............................................................       2.60       0.667          0.667
                                                                            ---------  -----------  --------------
Implied First Interstate price per share..................................  $  156.31   $  131.66     $   126.22
                                                                            ---------  -----------  --------------
Superiority of FBS offer..................................................              $   24.65     $    30.09
                                                                                       -----------  --------------
                                                                                       -----------  --------------
</TABLE>

- ------------------------
(a)  As shown  in the  table  entitled "Estimated  Reported Earnings  Per  Share
     Comparison."

(b)  Derived  by dividing the closing  stock prices of FBS  ($51- 5/8) and Wells
     Fargo ($219- 1/2) on December 12, 1995 by the related Consensus Estimate of
     1997 earnings shown in the table entitled "Estimated Reported Earnings  Per
     Share Comparison."

    Wells  Fargo ignores all of the factors  described above and argues that the
Wells Offer  is superior  based on  current stock  prices. But,  as Wells  Fargo
itself  admits with respect to its own stock price, market uncertainty regarding
which transaction will ultimately be  consummated is affecting the stock  prices
of  each of FBS, Wells Fargo and  First Interstate. FBS expects that approval of
the Merger by First  Interstate shareholders would  have a significant  positive
impact on FBS's stock price, as demonstrated by the above chart.

    Wells  Fargo's analysis  and projections are  inconsistent in  a manner that
raises significant doubt about the prospects for its future stock prices.  Wells
Fargo  assumes that it will repurchase $7.5 billion of its common stock over the
next five years. However,  the assumptions contained  in Wells Fargo's  November
13, 1995 presentation to analysts in this regard are mutually exclusive. In this
presentation,  Wells  Fargo assumed  that it  would  repurchase $7.5  billion in
common stock and have earnings per share of over $30 by the year 2000. As stated
by Brent B.  Erensel, CFA,  of UBS Securities  Inc.: "These  goals are  mutually
exclusive  unless one assumes that the stock price stays in the $230-$250 dollar
range [over the five-year period]. If the  stock buyback occurs at the 12.5  P/E
that  WFC has  assumed, then  earnings will approach  $28 per  share, well below
those forecast. When we applied WFC assumptions regarding net income  accretion,
including  5% base growth, $818  million in cost cuts,  and over $400 million in
goodwill amortization, and then  backed into the number  of shares required  for
purchase  to achieve the projected  accretion, we found that  in order for these
projections to be  achieved, the  stock price  must remain  moribund. These  are
WFC's publicly stated assumptions. . . . If one applies WFC's purchase target of
12.5  times  earnings, then  fewer  shares can  be  purchased and  the accretion
projections cannot be realized. Thus, there is a logical inconsistency: in order
for WFC to achieve  its earnings projections,  the stock must  stay low. If  the
stock price rises, the earnings projections cannot be realized."(1)

- ------------------------
(1)  Reprinted herein  from "Battling Wells  Fargo for  First Interstate," dated
    November 22, 1995, with the consent of the author.

                                       14
<PAGE>
    STOCK  REPURCHASE PROGRAM.   Wells Fargo has  asserted the value  of the FBS
proposal is overstated because  of FBS stock repurchases.  This is another  "red
herring."  FBS has had a continuing, publicly announced stock repurchase program
throughout 1993,  1994 and  1995.  This has  not  been a  clandestine,  recently
conceived,  merger-related tactic. 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 million and 6.3 million  shares in 1993 and 1994, respectively.
On January 19,  1995 and  February 15,  1995, FBS  announced that  its Board  of
Directors had authorized programs to repurchase 2 million and 14 million shares,
respectively,  by  the  end of  1996.  These  programs were  described  in FBS's
Quarterly Reports on Form 10-Q for the first and second quarters of 1995 and its
press releases  announcing  first and  second  quarter financial  results.  More
recently, on October 10, 1995, FBS further announced that it had repurchased 4.3
million shares in the third quarter pursuant to the authorized repurchase of 8.3
million   shares  in  connection  with  its  proposed  acquisition  of  FirsTier
Financial, Inc. 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  repurchase   programs.  The   repurchase  programs   were
reconfirmed  at the  November 6, 1995  analysts' meeting in  connection with the
announcement of the  Merger and described  in the November  6, 1995 joint  press
release  announcing the  Merger, which  was also  filed as  an Exhibit  to FBS's
Current Report on Form  8-K filed November 13,  1995. FBS's Quarterly Report  on
Form  10-Q  filed  with  the  Commission  on  November  13,  1995,  and  the FBS
Registration Statement, each also contains references to such repurchases.

    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  in the first, second and
third quarters  of 1995,  respectively. Continuing  this pattern  in the  fourth
quarter,  FBS expects  to repurchase  up to  approximately 4  million shares, of
which 3,507,411 have been  repurchased as of December  12, 1995. Although,  like
other  public  companies  engaged in  stock  repurchase programs,  FBS  does not
normally disclose its daily purchase activity, FBS is filing a Current Report on
Form 8-K with the Commission on December 13, 1995 containing a schedule of  such
activity  in response  to the  campaign of  misinformation regarding  this issue
being waged by Wells  Fargo. An active stock  repurchase program is a  long-term
feature of FBS's capital management goal of returning to its shareholders excess
capital  that may  result from future  earnings. Repurchases are  assumed in the
forecasted results describing the Merger. FBS will not purchase treasury  shares
under  its existing authorizations in the  90 days following consummation of the
Merger.

    In making  these  repurchases,  FBS strictly  adheres  to  the  Commission's
antimanipulation  rules. One of  these rules provides a  safe harbor against any
claim of stock manipulation if the  repurchases are limited in terms of  timing,
manner  of execution and other  factors. Another of these  rules limits the time
periods during  which  the repurchases  must  be made  and  expressly  prohibits
repurchases  during the  period of merger  proxy solicitations.  Because of this
rule, FBS was  prohibited from repurchasing  shares during most  of October  and
expects  to be prohibited from making repurchases for a portion of December 1995
and January 1996 during  the solicitation period for  its FirsTier merger.  More
directly  related to the  Wells Fargo allegations, this  same rule will prohibit
repurchases during a period of at least a month prior to the shareholder vote on
the Merger. This rule was adopted by the Commission expressly to ensure that the
type of manipulation  Wells Fargo has  accused FBS of  conducting cannot  occur.
That  is, even  if Wells  Fargo's assertions  about the  market effect  of FBS's
repurchases were true  (and they are  not), any such  effects would  necessarily
have  dissipated by the  time First Interstate shareholders  vote on the Merger.
FBS believes  that  it  is  Wells  Fargo  that  has  violated  the  Commission's
antimanipulation  rules by holding analysts and  investor meetings on December 6
and 7, 1995 in an effort to increase its stock price and the perceived value  of
the  Wells  Offer. See  "Value to  First Interstate  Shareholders--Wells Fargo's
Newfound Optimism."

SIGNIFICANT UNCERTAINTIES AND POTENTIAL DELAYS ASSOCIATED WITH THE WELLS OFFER

    Wells Fargo has repeatedly asserted that the Wells Offer could be  completed
within the same time frame as the Merger. FBS firmly believes that nothing could
be further from the truth. The Wells Offer

                                       15
<PAGE>
is  subject  to substantial  conditions and  contingencies, the  satisfaction of
which is far less certain than  the satisfaction of the customary conditions  to
the Merger, and which could result in significant delays.

    ANTITRUST AND REGULATORY UNCERTAINTIES AND DELAYS.  Any combination of Wells
Fargo and First Interstate would have to overcome substantial regulatory hurdles
that  could cause potential delays  not faced by the  Merger. Such a combination
would raise  significant antitrust  concerns,  as Wells  Fargo concedes  in  its
application  to the Federal Reserve Board. Wells Fargo concedes a need to divest
at least  $900  million  of  deposits. Wells  Fargo's  $900  million  of  stated
divestitures  appears  to  be  based  on  the  assumption  that  the  regulatory
authorities will permit a 50% weighting  of the deposits of thrift  institutions
for purposes of assessing the competitive effects of the Wells Offer. Based on a
review  of available information, California thrifts are not active suppliers of
unsecured business  banking credit,  and  FBS believes  that thrifts  should  be
accorded  a much lower (if any)  weighting for evaluating the competitive impact
of the Wells Offer. If thrift deposits were weighted at 20% instead of 50%,  for
example,  the required divestitures under the Wells Offer would be approximately
$2.3 billion  of deposits  in approximately  20 separate  markets. Moreover,  in
other  transactions where divestitures were  required, the Federal Reserve Board
has mandated  that branches  and other  assets to  be divested  be  specifically
identified   and  that  definitive  agreements  with  respect  to  the  required
divestitures be in place before the  transaction can be consummated. Indeed,  in
one  recent transaction involving major  divestitures, the Federal Reserve Board
did not  consider  the transaction  for  approval until  definitive  divestiture
agreements had been signed. In order to effect the substantial divestitures that
would  be required, Wells  Fargo would need  to identify branches  and assets in
multiple markets, identify suitable buyers and negotiate sales agreements.  This
would  be  further complicated  if Wells  Fargo  seeks to  divest some  of First
Interstate's existing branches, which Wells Fargo does not control. This process
would be far more time-consuming than  would be required in connection with  the
Merger,  which involves divestiture  of only a  small amount of  assets in three
local markets located outside of California.

    Any transaction requiring divestitures of  the magnitude of the Wells  Offer
will be carefully scrutinized not only by the Federal Reserve Board, but also by
the   United   States  Department   of  Justice   and  the   California  Banking
Superintendent, who is  required to consider  the competitive impact  of such  a
transaction  upon the State of California.  In addition, the Attorney General of
the State of California may well play an active role, as State Attorneys General
have done  in other  competitively  adverse transactions.  For example,  in  the
protracted   Bank  of  America--Security  Pacific  transaction,  the  California
Attorney General reportedly required further divestitures beyond those  mandated
by  the  Department of  Justice. According  to  the NEW  YORK TIMES,  after that
transaction  had  received  Department  of  Justice  clearance,  the  California
Attorney  General required Bank of America to increase the number of branches to
be divested  in California  by 36  percent.* Similarly,  in the  Fleet/  Shawmut
transaction,  the  Attorneys  General  of  Connecticut  and  Massachusetts  each
conducted its own independent  investigation, which included extensive  subpoena
demands.  There is no reason to expect that the regulatory authorities will give
any less scrutiny to the Wells Offer.

    The potential impact of significant divestitures on the timing of regulatory
approval is illustrated by  transactions selected by Wells  Fargo. In the  Wells
S-4, Wells Fargo cited a number of large bank transactions announced in 1995 for
purposes  of assessing FBS's projected cost  savings. What Wells Fargo failed to
mention is the  length of time  that elapsed before  receipt of Federal  Reserve
Board  approval of those transactions on its list where significant divestitures
were required. For example, in each  of the Fleet/Shawmut and U.S.  Bancorp/West
One  transactions, more than  seven months passed from  the time the transaction
was publicly announced to the time  it received Federal Reserve Board  approval.
In  sharp contrast, in the  transactions selected by Wells  Fargo that are known
not  to  involve  significant  divestitures--as  would  be  the  case  for   the
Merger--the  elapsed time between public  announcement and Federal Reserve Board
approval was approximately four months or less.

- ------------------------
* NEW YORK TIMES, March 12, 1992.

                                       16
<PAGE>
    Wells has announced  plans to close  85% of First  Interstate's branches  in
California,  which FBS believes  would have a  significant impact on communities
throughout California. In considering whether to approve a transaction under the
Bank Holding Company Act, the Federal Reserve Board is required to consider  the
effect  of the transaction on the convenience and needs of the communities to be
served  and  performance  under  the  Community  Reinvestment  Act  ("CRA").  In
connection  with several major transactions in recent years, the Federal Reserve
Board has held public  hearings to collect information  on the effects of  those
transactions  on the factors  of convenience and  community needs, including the
CRA performance of the institutions involved. The Federal Reserve Board did  not
state  the factors that lead  it to hold these  hearings, but those transactions
generally involved factors such as  substantial branch overlap, branch  closings
and/or  divestitures. The Federal Reserve Board's hearing process--including the
scheduling  and  conduct  of  the  hearing  and  evaluating  the  testimony  and
submissions--has  generally resulted in additional  time being required prior to
regulatory consideration  and  approval.  The  Federal  Reserve  Board  has  not
indicated  that it will hold any such hearing with respect to the Wells Offer or
the Merger. FBS believes that unlike  the Wells Offer, however, the Merger  does
not involve any substantial branch overlaps, closings or divestitures.

    FBS  also believes that the more than  $8 billion of additional goodwill and
other intangibles that would  result from the consummation  of the Wells  Offer,
and   the  resultant  $400  million   in  annual  amortization  expense,  raises
substantial regulatory issues relating to the adequacy of earnings, and will  be
an entirely separate focus of regulatory scrutiny.

    RIGHTS  PLAN AND SECTION 203  CONDITION.  The Wells  Offer is subject to the
inapplicability to its consummation of the First Interstate Rights Plan and  the
business  combination  restrictions set  forth in  Section  203 of  the Delaware
General Corporation  Law (the  "DGCL"). According  to Wells  Fargo, a  principal
reason  that the  timing of the  Wells Offer  would be the  same as  that of the
Merger is its  theory that if  the Merger  is not approved  by First  Interstate
shareholders,  Wells Fargo  would promptly obtain  the approval of  the Board of
Directors  of  First  Interstate  of  the  Wells  Offer  (thereby  avoiding  the
restrictions  of  Section  203 of  the  DGCL  and the  triggering  of  the First
Interstate Rights Plan) by, if necessary, immediately removing the directors  of
First Interstate. FBS believes that commencing such a consent solicitation prior
to receiving the requisite regulatory approval violates federal law and that, as
a result, consummation of the Wells Offer could be delayed for many months after
the  meeting of the First  Interstate shareholders to vote  upon the Merger. The
Merger is not subject  to any conditions regarding  the First Interstate  Rights
Plan or Section 203 of the DGCL.

    MINIMUM  TENDER  CONDITION.   Buried  in  the back  of  the Wells  S-4  is a
description of a "minimum tender condition" that requires that a majority of the
outstanding shares of First Interstate Common  Stock, on a fully diluted  basis,
be  tendered before the  Wells Offer can be  consummated. Approximately 62.7% of
the currently  outstanding  shares of  First  Interstate Common  Stock  must  be
tendered in order to satisfy this condition. Given the superior values for First
Interstate  shareholders  offered  by  the  Merger,  it  is  doubtful  that this
supermajority requirement will be satisfied in a timely manner, or at all.

    ACCOUNTING TREATMENT.  Wells  Fargo also has  cited FBS's stock  repurchases
and  the existence  of tainted  shares of  First Interstate  Common Stock  in an
effort to  cast doubt  about FBS's  ability  to complete  the Merger  under  the
pooling-of-interests  method of accounting. In doing so, Wells Fargo states that
it has relied upon the advice  of certain unnamed "advisors" who apparently  are
not  sufficiently confident of  such advice to have  their names associated with
it. FBS has every confidence that the pooling method is available. Ernst & Young
LLP, the independent  auditor for both  FBS and First  Interstate, has issued  a
letter  dated December 4, 1995 stating that based upon management's analysis and
representations, they concur with FBS  and First Interstate management that  the
Merger  would  qualify  as  a  pooling-of-interests  upon  consummation  of  the
transactions contemplated by  FBS and First  Interstate and the  closing of  the
Merger  in  accordance with  the  Merger Agreement.  As  is customary,  it  is a
condition  to  both  parties'  obligations  to  consummate  the  Merger  that  a
substantially identical letter be delivered at closing. FBS and First Interstate
fully  anticipate  receiving  such  a  letter and  consider  receipt  of  such a
bringdown letter to be a mere technicality.

                                       17
<PAGE>
    It is  Wells Fargo's  proposed accounting  treatment of  a transaction  with
First   Interstate  that  poses  potential  difficulties  for  First  Interstate
shareholders. Consummation of  the Wells  Offer would  penalize future  earnings
with  the amortization of more than $8  billion in additional goodwill and other
intangibles.  This  enormous  goodwill  burden  will  depress  future   reported
earnings,  reduce Wells Fargo's  financial flexibility in  an economic downturn,
potentially limit  Wells Fargo's  ability  to do  future acquisitions  and  will
likely  draw  close  regulatory  scrutiny.  With  the  Merger,  First Interstate
shareholders benefit from the  pooling-of-interests accounting treatment of  the
Merger. Existing capital management programs continue, no additional goodwill is
incurred and strategic flexibility is preserved for future acquisitions.

STRATEGIC ADVANTAGES

    INTRODUCTION.   FBS  is the best  strategic partner for  First Interstate in
terms of building shareholder value. Over the past six years, FBS's total return
to shareholders has been  41.7% (compounded annual  growth rate), compared  with
38.9%  for Wells  Fargo. The  Merger will  create significant  opportunities for
efficiency, revenue  growth and  risk diversification.  The Merger  also  offers
First  Interstate shareholders  the opportunity  to participate  in the expected
future growth  of FBS  and First  Interstate.  FBS has  built its  franchise  by
investing in technology, expanding its core businesses and creating a culture in
which day to day operations are consistently evaluated with a view to maximizing
shareholder  value. FBS believes it  can successfully implement these strategies
at New First Interstate following the Merger.

    EFFICIENCY AND GROWTH PROSPECTS.  FBS's retail bank franchise is founded  on
an  efficient,  centralized  product  management  and  operations  structure and
multiple distribution channels. FBS's product and distribution model is designed
to divide its product management efforts from its sales functions, enabling  FBS
to  contain costs while  expanding market share.  Investments in technology have
reduced costs and increased  productivity, making FBS one  of the nation's  most
efficient  banks with  an efficiency ratio  for the quarter  ended September 30,
1995 of 51.9%. Moreover, contrary to the experience of Wells Fargo, FBS has seen
considerable expansion in its core businesses during recent years.

                                       18
<PAGE>
    As part of  its growth  strategy, FBS  has made  significant investments  in
several  high return businesses with  attractive income streams. The combination
of First Interstate and FBS will be a leading institution in several high return
businesses, as shown in the chart below:

                            COMBINED BUSINESS LINES
                             (DOLLARS IN MILLIONS)
<TABLE>
<CAPTION>
                                                                                         FIRST        NEW FIRST
CREDIT CARDS                                                               FBS        INTERSTATE     INTERSTATE
- --------------------------------------------------------------------  -------------  -------------  -------------
<S>                                                                   <C>            <C>            <C>
Sales (annualized 1995 volume)......................................     $   15,000   $    2,000      $    17,000
Loans (pro forma September 30, 1995 outstandings)...................     $    2,500   $    1,200      $     3,700

<CAPTION>

MERCHANT PROCESSING
- --------------------------------------------------------------------
<S>                                                                   <C>            <C>            <C>
Merchants (estimated year end 1995).................................         65,000       41,000          106,000
Sales (annualized 1995 volume)......................................     $   16,000   $    4,000      $    20,000
<CAPTION>

INDIRECT LENDING
- --------------------------------------------------------------------
<S>                                                                   <C>            <C>            <C>
Loans (September 30, 1995)..........................................     $    1,900   $    3,500      $     5,400
Dealers (October 1995)..............................................          1,000          900            1,900
Originations (estimated 1995 volume)................................     $    1,000   $    2,000      $     3,000
<CAPTION>

ASSETS UNDER MANAGEMENT AT OCTOBER 31, 1995.........................        $29,000     $22,500           $51,500

PROPRIETARY MUTUAL FUNDS
- --------------------------------------------------------------------
<S>                                                                   <C>            <C>            <C>
Number (at October 31, 1995)........................................             25           18(a)            43
Assets under management (at October 31, 1995).......................     $    7,000   $    4,800      $    11,800
</TABLE>

- ------------------------
(a) As adjusted for consolidations occurring after October 31, 1995.

    FBS's  payment  systems  business  (consumer  credit  cards,  corporate  and
purchasing  card services, card-accessed  secured and unsecured  lines of credit
and automatic teller machine and merchant  processing) is its largest source  of
fee income and a proven source of growth:

                     FBS PAYMENT SYSTEMS NONINTEREST INCOME
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                                               PERCENT
                                                                                         3Q-94      3Q-95      CHANGE
                                                                                       ---------  ---------  -----------
<S>                                                                                    <C>        <C>        <C>
Consumer credit card.................................................................  $    22.9  $    27.8       21.4%
Corporate card.......................................................................       10.0       14.6       46.0
Purchasing card......................................................................        5.4       12.1      124.1
Merchant processing..................................................................       12.4       15.4       24.2
                                                                                       ---------  ---------
  Total..............................................................................  $    50.7  $    69.9       37.9%
                                                                                       ---------  ---------      -----
                                                                                       ---------  ---------      -----
</TABLE>

    As  part of its payment  systems business, FBS has  relationships with 31 of
the Fortune 100 companies and 121 of the Fortune 500 companies.

                                       19
<PAGE>
    FBS's strategies  and  investments  have resulted  in  superior  growth  and
revenues when compared to those of Wells Fargo, as shown below:

                       GROWTH PERFORMANCE COMPARISON (A)

<TABLE>
<CAPTION>
                                                                                                     FBS          WFC
                                                                                                 -----------  -----------
<S>                                                                                              <C>          <C>
Revenue........................................................................................        6.0%         2.5%
Noninterest
  Income.......................................................................................       10.8          8.5
Loans (b)......................................................................................       12.0          1.2
Net income applicable to common shares.........................................................       22.2          5.0
Earnings per share.............................................................................       22.1         11.6
</TABLE>

- ------------------------
(a)  Compares  annual growth rate based on  annualized 1995 results for the nine
     month period  ended September  30, 1995  versus 1993  results.  Noninterest
     income  excludes  securities gains  and losses,  sales  of loans  and other
     assets and income tax settlement. The normalized loan loss provision is  80
     basis  points  for Wells  Fargo. FBS's  net income  excludes merger-related
     charges.

(b)  Excludes residential first mortgage loans.

    In contrast,  during  the past  several  years  Wells Fargo  has  pursued  a
strategy  based  on  financial  engineering, not  business  growth.  Rather than
investing in expansion and  high growth businesses, Wells  Fargo has focused  on
cost  cutting and  stock buybacks. On  page 2  of its 1994  Annual Report, Wells
Fargo states, " . .  . much of the improvement  from 1993 resulted from a  lower
loan  loss provision . .  . not from growth  in our underlying operations." That
trend continues in 1995. According to Wells Fargo's third quarter report on Form
10-Q, "The  percentage increase  in  per share  earnings  was greater  than  the
percentage  increase  in  net  income  due  to  the  Company's  continuing stock
repurchase  program.  .  .  .  The  higher  third  quarter  1995  results   were
substantially  due to a zero loan loss provision.  . . . " These approaches have
only a limited potential for long-term growth and are reflective of a management
view that the value of Wells Fargo's existing franchise has peaked. Indeed, in a
November 22, 1995,  interview with the  NEW YORK TIMES  Paul Hazen, Chairman  of
Wells Fargo, stated: "If you hold a hand of cards and have nothing to work with,
you  have  to  wait for  the  next hand.  That's  where we  are  today."(1) This
viewpoint does not seem promising in terms of future growth and increased  value
for  First  Interstate shareholders.  In an  apparent  effort to  counteract the
negative effect of  these admissions,  on December 6  and 7,  1995, Wells  Fargo
announced  aggressive  growth  statistics  inconsistent  with  both  its  recent
performance and  these comments.  As  discussed in  "Value to  First  Interstate
Shareholders--Wells  Fargo's Earnings Estimates,"  FBS believes First Interstate
shareholders should  view  such  revised  projections  with  a  high  degree  of
skepticism.

    In  short,  FBS  offers  First Interstate  shareholders  the  opportunity to
participate in a dynamic, growing enterprise  that is responsive to the  current
banking  environment and  aggressively pursuing  a variety  of innovative income
opportunities.  Wells  Fargo  apparently  expects  to  achieve  earnings  growth
principally  through  cost  cutting,  share  repurchases  and  other  methods of
financial engineering.

    MARKET POSITIONS.  The Merger  would increase First Interstate's  geographic
diversification to 21 states from the 13 states where First Interstate currently
does business, thereby lowering its exposure to regionalized economic downturns.
The  combination of FBS and First Interstate would have a top three market share
ranking in 11 states, and only 30% of the assets of the combined entity would be
located in California.  The Wells Offer  would, conversely, further  concentrate
operations  in California, with approximately 70% of the total assets and 78% of
the real estate loan assets of  the combined company located in California.  The
territory  of  the combined  entity of  Wells Fargo  and First  Interstate would
remain limited to 13 states, with a top three ranking in only four states.

- ------------------------
(1)  Permission to quote this article has not been sought or obtained from the
     NEW YORK TIMES or the author.

                                       20
<PAGE>
                     FBS/FIRST INTERSTATE MARKET SHARES (A)
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                               DEPOSIT
                                                                                  TOTAL      MARKET SHARE       MARKET
STATE                                                                           DEPOSITS      PERCENTAGE         RANK
- ------------------------------------------------------------------------------  ---------  ----------------  ------------
<S>                                                                             <C>        <C>               <C>
California....................................................................  $  23,155         9.4%               3
Minnesota.....................................................................     11,219        24.5                1
Arizona.......................................................................      7,073        22.5                3
Colorado......................................................................      6,615        22.6                1
Texas.........................................................................      5,560         3.8                5
Oregon........................................................................      5,227        24.1                2
Washington....................................................................      4,229        11.7                4
Nevada........................................................................      3,453        30.4                2
Nebraska......................................................................      3,246        15.5                1
North Dakota..................................................................      1,989        24.1                1
Montana.......................................................................      1,232        18.7                2
Iowa..........................................................................      1,068         3.2                5
Illinois......................................................................        998         0.6               20
South Dakota..................................................................        873        10.5(b)             2(b)
Utah..........................................................................        847         7.3                4
Idaho.........................................................................        788         9.3                4
Wyoming.......................................................................        683        14.0                2
Kansas........................................................................        531         2.0                7
Wisconsin.....................................................................        408         1.0                8
New Mexico....................................................................        113         1.0               19
Alaska........................................................................         33         0.9                8
                                                                                ---------
  Total.......................................................................  $  79,340
                                                                                ---------
                                                                                ---------
</TABLE>

- ------------------------------
(a)  Excluding thrifts and savings banks.

(b)  Excluding credit card banks.

Source: FDIC as of June 30, 1994--updated for acquisitions since such date.

    According to Wells Fargo, the combined population of the states where it and
First Interstate would rank first, second or third in terms of deposits would be
approximately 40 million, compared  with 21 million for  the combination of  FBS
and  First Interstate. This misleading  analysis excludes the combined FBS/First
Interstate entity from a top three position in California. California's  largest
thrift institution (in terms of total deposits), H.F. Ahmanson, has less than $1
billion  in demand  deposit accounts, virtually  no commercial loans  and a loan
portfolio that  consists  primarily  of residential  mortgages.  Excluding  this
institution,  New  First Interstate  would  properly have  a  top three  rank in
California. As a result, the combined  population of the states where New  First
Interstate  would  rank among  the top  three banking  institutions would  be 52
million, versus 40  million for the  proposed Wells Fargo  and First  Interstate
combination.

                                       21
<PAGE>
    New   First  Interstate  would  maintain  a  top  four  market  rank  in  50
metropolitan areas and 73% of its deposits  would be located in areas where  the
combined entity maintained a rank of three or higher.

                STRONG MARKET POSITION IN METROPOLITAN AREAS (A)

<TABLE>
<CAPTION>
                                                                                                               WEIGHTED
                                                     NUMBER OF            TOTAL              DEPOSIT            AVERAGE
RANK                                                   AREAS             DEPOSITS           PERCENTAGE       MARKET SHARE
- --------------------------------------------------  ------------     ----------------     --------------     -------------
                                                                      (IN BILLIONS)
<S>                                                 <C>              <C>                  <C>                <C>
1.................................................        14              $  19.8                 25%            34.0%
2.................................................        16                 23.5                 30             18.5
3.................................................         9                 14.2                 18             15.8
4.................................................        11                  4.4                  5             10.3
5 or lower........................................        33                  7.9                 10            --
                                                          --
                                                                            -----                ---
Subtotal..........................................        83              $  69.8                 88
                                                          --
                                                          --
Non MSA...........................................                            9.5                 12
                                                                            -----                ---
  Total...........................................                        $  79.3                100%
                                                                            -----                ---
                                                                            -----                ---
</TABLE>

<TABLE>
<CAPTION>
                                                                    MARKET   MARKET
METROPOLITAN SERVICE AREA                             DEPOSITS      SHARE     RANK
- --------------------------------------------------  -------------   ------   -------
                                                    (IN MILLIONS)
<S>                                                 <C>             <C>      <C>
Minneapolis/St. Paul..............................     $9,137       33.8%       1
Los Angeles/Long Beach............................      9,114       11.8        2
Denver............................................      5,598       34.5        1
Phoenix/Mesa......................................      4,713       22.0        3
Houston...........................................      3,229       10.6        3
Portland/Vancouver................................      2,848       23.0        2
Seattle/Bellevue/Everett..........................      2,608       14.5        3
Sacramento........................................      2,469       24.0        2
San Diego.........................................      2,165       13.6        4
Las Vegas.........................................      2,146       27.1        2
Omaha.............................................      1,798       23.8        2
Orange County.....................................      1,741        8.6        3
Riverside/San Bernardino..........................      1,145       12.1        2
Tucson............................................      1,071       21.4        3
</TABLE>

- ------------------------------
(a)  Excludes thrifts and savings banks.

                                       22
<PAGE>
RISK ELEMENTS

    Completion  of  the  Wells  Offer  would result  in  an  institution  with a
substantially higher risk profile than that created by the Merger.

    CAPITAL STRUCTURE.    The difference  in  the accounting  treatment  of  the
proposed  transactions  results  in  institutions  with  dramatically  different
capital structures, as demonstrated below:

                               GOODWILL ANALYSIS
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                  WFC/FI           FBS/FI
                                                                                -----------  ------------------
<S>                                                                             <C>          <C>
Pro forma common equity.......................................................  $    14,170          $    6,683
Existing goodwill and other intangibles.......................................          832               1,921

Additional goodwill and other intangibles from the transaction:
  Goodwill and other intangibles from the transaction.........................        7,876(a)                N/A
  Transaction-related charges (after tax)(b)..................................          240                 N/A(c)
  Termination fee (b).........................................................          100                 N/A
  Repurchase of FBS stock option (b)..........................................          100                 N/A
                                                                                -----------            --------
        Subtotal additional goodwill and other intangibles from the
         transaction..........................................................        8,316                 N/A
                                                                                -----------            --------
Total goodwill and other intangibles..........................................        9,148               1,921
                                                                                -----------            --------
Tangible common equity........................................................  $     5,022          $    4,762
                                                                                -----------            --------
                                                                                -----------            --------
Pro forma tangible assets.....................................................  $   103,007          $   87,496
                                                                                -----------            --------
                                                                                -----------            --------
Pro forma goodwill and other intangibles/common equity........................          65%                 29%
                                                                                -----------            --------
                                                                                -----------            --------
Pro forma tangible common equity/tangible assets..............................        4.88%               5.44%
                                                                                -----------            --------
                                                                                -----------            --------
</TABLE>

- ------------------------------
(a) Source: the Wells S-4.

(b) Such item was  not included in goodwill  and other intangibles described  in
    the  Wells S-4. However, such charges would, in fact, increase the amount of
    goodwill and  other  intangibles  ultimately  recorded  by  Wells  upon  any
    consummation of the Wells Offer. In addition, Wells Fargo has indicated that
    an  additional $180 million (after  tax) of transaction-related charges will
    be charged against earnings following any such consummation.

(c) Included in pro forma common equity.

    The use of  the purchase accounting  method by Wells  Fargo would result  in
more  than $8 billion of additional goodwill  and other intangibles that will be
amortized against reported  earnings at  a rate of  approximately $400  million,
after  tax, per year for many years.  In addition, this enormous goodwill burden
will reduce  Wells  Fargo's  financial  flexibility  in  an  economic  downturn,
potentially  limit  Wells Fargo's  ability to  do  future acquisitions  and will
likely receive close regulatory scrutiny. The $9.1 billion of goodwill and other
intangibles that would  result from the  Wells Offer would  be the largest  such
amount  in the regional bank peer group. In addition, the 65% pro forma ratio of
goodwill and other intangibles to common  equity resulting from the Wells  Offer
would  be by far the highest such ratio  among the regional bank peer group. The
next highest such ratio is approximately 43%.

    GEOGRAPHIC CONCENTRATION.   From the  standpoint of risk,  the Merger  would
significantly  lower First  Interstate's risk  profile. The  Merger would vastly
increase  First  Interstate's  geographic  diversification,  thereby  decreasing
exposure  to  regionalized economic  downturns.  From the  perspective  of First
Interstate shareholders, the Wells Offer  would result in further  concentration
of  assets, particularly real estate loan  assets, in California. As Wells Fargo
noted in its Federal Reserve Board application, a benefit of the Wells Offer  to
Wells Fargo (not First Interstate) is diversification of its risk portfolio. See
"Strategic Advantages."

    BUSINESS  MIX.  Wells Fargo's mix of business strategies represents a higher
risk profile than  that of  FBS. These  additional risks  translate into  higher
stock price betas, which are measures of perceived

                                       23
<PAGE>
risk  in a company.  Based on 104  weeks of data  computed by Bridge Information
Systems, Inc., FBS had  a stock price beta  of .90 and Wells  Fargo had a  stock
price beta of 1.08 as of December 12, 1995. The higher beta for Wells Fargo is a
result  of their higher risk profile. As  Henry C. Dickson, CFA, of Smith Barney
Inc. stated: "We  believe the disparity  in beta coefficients  which causes  the
difference in discount rates is warranted due to WFC's greater dependence on one
economy,  its greater exposure to commercial real estate, its strategy to pursue
higher risk credit,  and its lack  of experience running  a multi-state  holding
company."(1)  Wells Fargo is counting on a  retail strategy that would force its
customers to abandon traditional  branch banking in  an unrealistic time  frame.
Under  Wells  Fargo's  projections  Wells  Fargo  is  attempting  to  reduce the
percentage of its outlets that are  traditional branches from the current  level
of  94% of total outlets to  28% by the end of 1996.  As quoted in a December 5,
1995 article in  the AMERICAN  BANKER, James  M. McCormick,  president of  First
Manhattan Consulting Group, stated, "We had better be careful in any attempts to
radically  downsize the branch system." According to the article by Karen Epper,
"Branch-Only Customers Churn Out Most Retail Profits, Study Suggests," the First
Manhattan Consulting  Group  research  indicates that  "[u]sers  of  alternative
delivery  channels may not be as numerous or as profitable as common wisdom says
they are."(2)

    Additionally, Wells  Fargo's  revenue stream  is  highly dependent  on  real
estate  lending, historically one  of the most volatile  segments of the banking
business. According  to Wells  Fargo's Quarterly  Report on  Form 10-Q  for  the
quarter  ended September  30, 1995,  commercial real  estate lending constituted
over 28% of  Wells Fargo's total  loan portfolio as  of such date.  FBS, on  the
other  hand,  is reliant  on  more stable  revenue sources  and  had a  ratio of
commercial real estate  loans to total  loans of  only 11% as  of September  30,
1995.

TECHNOLOGICAL ADVANTAGES

    FBS  has made the investment in  technology and systems necessary to support
its interstate  expansion  and  to  allow  the  rapid  integration  of  acquired
financial   institutions.   FBS's   systems   are   based   on   a  standardized
enterprise-wide model  and  provide  a multi-state  operating  environment.  The
household  information based nature of  its systems enables FBS  to focus on the
customer and the product.

    FBS's  information  system  utilizes  parallel  processing,  giving  FBS  an
exceptional  capacity to  handle additional information  volume at  a lower cost
than traditional  systems. The  scalability  of the  system  would allow  it  to
support  eight times more servers than it currently does, and each server on the
network  could  be  upgraded  to  eight  times  its  current  processing  power.
Additionally, interruptions in service are virtually eliminated.

    FBS's   state-of-the-art  network  infrastructure   supports  a  multi-state
operating environment and currently  operates in 24  states, including seven  of
the  13 states in which First Interstate does business. FBS and First Interstate
share a number  of common systems,  including the "Hogan"  deposit and  customer
information systems, the core information systems for banks.

    The  ability  of  two  large institutions  to  successfully  integrate their
technology and  operations on  the most  cost effective  basis requires:  (i)  a
software environment for the combined entities that is designed for standardized
product  and customer processing in multiple  states and capable of handling the
combined volumes of the entities;  (ii) a standardized methodology for  planning
and  implementing the  technology integration  process, including  the necessary
personnel training;  and (iii)  a process  at the  senior management  level  for
monitoring  and  guiding  the  integration  efforts.  FBS  has  such  a software
environment, standardized methodology and process at the senior management level
and has successfully utilized these  attributes to integrate 23 acquisitions  in
the last four years.

- ------------------------
(1)  Reprinted herein from  "First Bank System  vs. Wells Fargo,  The Battle for
    First Interstate," dated December 1, 1995, with the consent of the author.

(2) Permission to quote this  article has not been  sought or obtained from  the
    AMERICAN BANKER or the author.

                                       24
<PAGE>
    FBS  has achieved significant operational  cost efficiencies through systems
and technology consolidations in numerous prior bank acquisitions. 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. This rapid  integration will permit
quick realization of the  resultant cost savings and  enable the management  and
employees  of New First Interstate to more  quickly turn their full attention to
sales and other revenue  growth opportunities. Wells Fargo,  on the other  hand,
has  indicated  its  integration of  First  Interstate could  require  more than
eighteen months,  resulting  in a  prolonged  period of  customer  and  employee
disruption.

COST SAVINGS AND ASSOCIATED REVENUE LOSSES

    ANTICIPATED  EXPENSE  REDUCTIONS.    Based  on  FBS's  extensive acquisition
experience, FBS estimates  that the  Merger would result  in approximately  $500
million  in  expense reductions  from First  Interstate's expected  1996 expense
base, which corresponds to approximately 22% of First Interstate's total expense
base. This level of savings would result in a marginal efficiency ratio of  45%.
FBS,  despite the contentions of Wells  Fargo to the contrary, remains confident
that it can achieve these reductions within three months of the consummation  of
the Merger. As the following chart demonstrates, FBS's projected cost reductions
and timetable are entirely consistent with its prior experience:

<TABLE>
<CAPTION>
                                                                                  EXPENSE
                                                                              ELIMINATIONS AS
                                                                              A PERCENTAGE OF
                                                                               THE ACQUIRED         MONTHS
                                                    CLOSING                    INSTITUTION'S     FROM CLOSING
FINANCIAL INSTITUTION ACQUISITIONS                   DATE      ASSET SIZE     TOTAL EXPENSES    TO INTEGRATION
- --------------------------------------------------  -------   -------------   ---------------   --------------
                                                              (IN MILLIONS)
<S>                                                 <C>       <C>             <C>               <C>
FirsTier Financial, Inc. (pending) (a)............   1 Q-96      $3,580             34%              < 1
Midwestern Services, Inc..........................   4 Q-95         230             30               < 1
Southwest Holdings, Inc...........................   4 Q-95         200             33               < 1
First Western Corporation.........................   1 Q-95         320             35                 3
Metropolitan Financial Corporation................   1 Q-95       8,000             35               < 1
Green Mountain Bancorporation.....................   3 Q-94          30             50               < 1
First Dakota Financial Corporation................   3 Q-94         120             40                 1
First Financial Investors, Inc....................   2 Q-94         200             44                 2
Boulevard Bancorp, Inc............................   1 Q-94       1,600             40                 1
American Bancshares of Mankato, Inc...............   1 Q-94         120             51               < 1
Colorado National Bankshares, Inc.................   2 Q-93       3,000             35                 2
Western Capital Investment Corporation............   4 Q-92       2,500             35                 3
Bank Shares, Incorporated.........................   4 Q-92       2,100             45                 5
</TABLE>

- ------------------------------
(a)  Projected.

    Stock  market analysts have  commented favorably on  FBS's projected expense
reductions. In a November  28, 1995 research report,  Nancy A. Bush, CFA,  Brown
Brothers  Harriman  &  Co. said  "We  have  perused both  sets  of  cost savings
projections, and  while  both  companies have  formidable  reputations  as  cost
cutters,  our focus  remains the  net cost  savings numbers--I.E.,  the revenues
which would likely be  lost in the two  competing strategies." Ms. Bush  further
stated  "[T]he  most  important  factor  is  that  [the  cost  savings]  will be
accomplished in a way which is  largely transparent to the customer, as  opposed
to  the  Wells strategy,  which would  involve  closure of  a massive  number of
branches and a massacre  of existing personnel (12,000-plus).  But we must  also
admit  that  our  faith  in the  FBS  strategy  and numbers  is  based  upon our
experience with that management, which has simply always delivered the goods  as
promised  and will have a friendly environment in this deal to do so."(1) Carole
Berger and Jeff Nashek of Salomon Brothers Inc noted: "They use centralized data
processing and

- ------------------------
(1) Reprinted herein from "First Bank System," dated November 28, 1995, with the
    consent of the author.

                                       25
<PAGE>
operations and standard products. The cost savings that they are targeting would
represent efficiencies equal to  the best practices of  either company, but  are
not new industry setting standards on a line by line basis. We therefore believe
that  their cost  savings are credible  and doable and  will produce significant
upside to First Bank System earnings."(1)

    Wells Fargo,  despite its  lack  of common  information systems  with  First
Interstate,  its lack  of acquisition  experience and  its incomplete geographic
overlap with First  Interstate, projects  that consummation of  the Wells  Offer
would  result in $1 billion of  cost reductions from First Interstate's expected
1996 expense base, or 44% of First Interstate's total expected expense base  for
such  year, with only $100 million of attendant revenue loss (including revenues
lost in connection with branch divestitures) and a marginal efficiency ratio  of
33%.  FBS  believes the  projections  on which  these  assertions are  based are
counter-intuitive, illusory  and unattainable.  In this  regard, the  Wells  S-4
makes  a serious misrepresentation  when it claims that  Mr. Siart, Chairman and
Chief Executive  Officer of  First Interstate  "agreed with  Wells Fargo's  cost
savings  estimates." FBS has been  advised, and the Wells  S-4 fails to mention,
that Mr. Siart went on to say  that the achievement of the projected  reductions
would,  however, result  in substantially  higher revenue  losses than  the $100
million assumed by Wells Fargo. In FBS's view, the maximum annual savings net of
revenue losses resulting  from the  Wells Offer is  only $600  million, as  more
fully explained herein.

    SOURCES  OF COST ELIMINATIONS.  The  following table compares the percentage
of the total expected 1996 expense base of First Interstate and of the  combined
entity  projected  to  be eliminated  by  FBS  and Wells  Fargo,  the associated
marginal  efficiency  ratios  and  the  related  timetables  for  achieving  the
estimated savings:

<TABLE>
<CAPTION>
                                                           CLAIMED
                                                     PERCENTAGE OF TOTAL    CLAIMED PERCENTAGE     ASSERTED     EXPECTED TIME
                                                    1996 FIRST INTERSTATE     OF THE COMBINED      MARGINAL       TO ACHIEVE
                                                        EXPENSE BASE           EXPENSE BASE       EFFICIENCY         COST
TRANSACTION                                           TO BE ELIMINATED       TO BE ELIMINATED        RATIO        REDUCTIONS
- -------------------------------------------------  -----------------------  -------------------  -------------  --------------
<S>                                                <C>                      <C>                  <C>            <C>
The Merger.......................................               22%                    14%               45%         3 months
The Wells Offer..................................               44%                    22%               33%        18 months
</TABLE>

    With  regard to  the foregoing,  FBS does not  believe that  Wells Fargo can
credibly predict that it will achieve  a marginal efficiency ratio of 33%,  upon
consummation of the Wells Offer. FBS, which has the second best efficiency ratio
in its peer group, has never achieved a marginal efficiency ratio as low as 33%,
even  in the in-market acquisition context.  With only 36% of First Interstate's
branches and 44%  of its  deposits in  California, the  proposed acquisition  of
First  Interstate  by  Wells Fargo  must  be  characterized as  only  a combined
in-market/market extension acquisition, not an in-market acquisition.

    In the  Wells S-4,  Wells  Fargo misleadingly  characterizes the  amount  of
expenses  to be eliminated through the  Merger by comparing the Merger's expense
eliminations to  the expense  base of  FBS, concluding  that the  resultant  42%
figure  is "two to three times greater"  than those projected by other acquirors
in market extension transactions. This  analysis is entirely incorrect. The  22%
expense  reduction associated with the Merger  is completely consistent with the
experience of other acquirors  in the transactions described  in the Wells  S-4.
Michael  A. Plodwick of C.J.  Lawrence stated, "[W]e believe  this level of cost
savings is readily  achievable, as First  Bank has demonstrated  its ability  to
reduce costs in out-of-market acquisitions."(2)

    In   fact,  it  is  Wells  Fargo  that  has  unrealistic  expense  reduction
expectations based on such transactions. Wells Fargo has operations in only  one
of the 13 states in which First Interstate operates,

- ------------------------
(1) Reprinted herein from "First Bank System to Acquire First Interstate," dated
    November 6, 1995, with the consent of the author.

(2) Reprinted  herein from "First Bank System," dated November 7, 1995, with the
    consent of the author.

                                       26
<PAGE>
and so  FBS  believes  the Wells  Offer  should  be characterized  as  a  market
extension  transaction,  which  typically  result  in  expense  reductions  only
one-half the magnitude  of those  projected by Wells  Fargo. In  the Wells  S-4,
Wells  Fargo  claims  the Wells  Offer  would  be an  in-market  acquisition and
compares the cost takeout level  with other in-market acquisitions. In  reality,
as  the following  chart indicates,  the in-market  acquisitions cited  by Wells
Fargo in the Wells S-4 are generally twice as concentrated in terms of  deposits
and branches than the Wells Fargo/First Interstate combination would be.

                      IN-MARKET ACQUISITION COMPARISON (A)

<TABLE>
<CAPTION>
                                                                                               PERCENTAGE OVERLAP (B)
                                                                                              ------------------------
ACQUISITION                                                                                    DEPOSITS     BRANCHES
- --------------------------------------------------------------------------------------------  -----------  -----------
<S>                                                                                           <C>          <C>
Fleet/Shawmut...............................................................................       99.9%        99.5%
PNC/Midlantic...............................................................................       62.2         69.9
Chemical/Chase..............................................................................       89.6         76.6
UJB/Summit..................................................................................      100.0        100.0
Corestates/Meridian.........................................................................       81.8         73.0

Proposed Wells Fargo/First Interstate.......................................................       44.2         37.5
</TABLE>

- ------------------------------
(a) Acquisitions shown are those cited by Wells Fargo in the Wells S-4.

(b) Source: SNL Securities

    Even  viewing the Wells Offer as a mixture of an in-market acquisition and a
market extension transaction,  the average expense  eliminations cited by  Wells
Fargo  would suggest cost  savings approximating only  29% of First Interstate's
1996 estimated operating expenses ($659 million). Wells Fargo claims it will cut
44% of such expenses.  FBS's analysis, as described  below, suggests that  Wells
Fargo  may be  able to achieve  cost savings  totaling $780 million  (or 34%) of
First Interstate's 1996 estimated operating expense base, although these savings
will be offset by an estimated $180 million in annual revenue losses.

    The following table  compares the  areas and  amounts of  the reductions  in
First  Interstate's 1996 expense  base following consummation  of the Merger and
the Wells Offer:

                          PROJECTED EXPENSE REDUCTIONS
                             (DOLLARS IN MILLIONS)
<TABLE>
<CAPTION>
                                    FIRST                    THE MERGER                               THE WELLS OFFER
                                 INTERSTATE   -----------------------------------------  -----------------------------------------
                                  1996 BASE                   REDUCTION      REMAINING                   REDUCTION      REMAINING
                                   EXPENSE     REDUCTION     PERCENTAGE       EXPENSE     REDUCTION     PERCENTAGE       EXPENSE
                                 -----------  -----------  ---------------  -----------  -----------  ---------------  -----------
<S>                              <C>          <C>          <C>              <C>          <C>          <C>              <C>
Staff/executive................   $     172    $     114             66%     $      58    $     159             92%     $      13
Data processing................         214           83             39            131          110             51            104
Operations.....................         439          110             25            329          123             28            316
Occupancy/F&E..................         394           39             10            355          170             43            224
Business lines:
Retail.........................         682          100             15            582          288             42            394
Payment systems................          55           27             50             28           29             53             26
Commercial.....................         168           18             10            150           92             55             76
Trust..........................          79            9             10             70           29             37             50
                                 -----------       -----                    -----------  -----------                   -----------
  Total business lines.........         984          154             16            830          438             44            546
                                 -----------       -----                    -----------  -----------                   -----------
    Goodwill...................          60            0              0             60            0              0             60
                                 -----------       -----                    -----------  -----------                   -----------
  Total expense................   $   2,263    $     500             22%     $   1,763    $   1,000             44%     $   1,263
                                 -----------       -----                    -----------  -----------                   -----------
                                 -----------       -----                    -----------  -----------                   -----------

<CAPTION>
                                     WFC
                                     VS.
                                     FBS
                                 DIFFERENCE
                                 -----------
<S>                              <C>
Staff/executive................   $     (45)
Data processing................         (27)
Operations.....................         (13)
Occupancy/F&E..................        (131)
Business lines:
Retail.........................        (188)
Payment systems................          (2)
Commercial.....................         (74)
Trust..........................         (20)
                                 -----------
  Total business lines.........        (284)
                                 -----------
    Goodwill...................           0
                                 -----------
  Total expense................   $    (500)
                                 -----------
                                 -----------
</TABLE>

                                       27
<PAGE>
    Wells Fargo and  FBS are  each highly  centralized, and  so neither  company
should  have an inherent advantage in the number of staff or executive personnel
that can be removed from First  Interstate following a transaction. Wells  Fargo
nevertheless  estimates  that it  can eliminate  92%  of these  cost components,
compared to 66%  for FBS. In  data processing,  an area where  FBS believes  the
compatibility  of its multi-state systems with those of First Interstate provide
it with an advantage (see  "Technological Advantages"), Wells Fargo forecasts  a
51% cost reduction, versus 39% for FBS.

    FBS  believes that Wells Fargo's  projections for achievable cost reductions
in First Interstate's business operations are even more unrealistic. Even though
approximately 36% of First Interstate's branches are in California, Wells  Fargo
estimates that it could cut 42% of First Interstate's total retail cost base. In
the  customer-sensitive businesses  of commercial banking  and trust management,
Wells Fargo  apparently intends  to attempt  to  eliminate 55%  and 37%  of  the
associated  cost bases, respectively. These asserted reductions, which aggregate
$121 million, would  necessarily come from  First Interstate's line  operations,
the primary source of customer relations in these businesses because Wells Fargo
has  separately estimated data  processing and operations  savings. FBS believes
that  such  an   aggressive  cost-cutting  approach   would  likely  result   in
irreversible  revenue deterioration.  To avoid  this result,  FBS envisions only
modest 10%  expense  reductions  in  First  Interstate's  commercial  and  trust
businesses.  For  its part  Wells  Fargo proposes  to  make deep  cuts  in First
Interstate's commercial lending and corporate trust businesses and  nevertheless
claims  in the Wells S-4 that it "sees substantial revenue growth opportunities"
in these areas.  Despite the assertions  of Wells Fargo  to the contrary,  these
goals are plainly irreconcilable.

    Further  evidence  of  the  unrealistic nature  of  Wells  Fargo's projected
expense reductions is apparent  from an examination of  the savings presumed  by
Wells  Fargo  to  be generated  through  the reduction  of  full-time equivalent
employees ("FTEs"). The following  chart summarizes the contrasting  assumptions
of FBS and Wells Fargo in this regard:

                         EMPLOYEE REDUCTION COMPARISON

<TABLE>
<CAPTION>
                                                            FIRST                 FBS                         WFC (A)
                                                         INTERSTATE   ----------------------------  ----------------------------
                                                         -----------      FTE         REDUCTION         FTE         REDUCTION
                                                          1996 BASE    REDUCTION     PERCENTAGE      REDUCTION     PERCENTAGE
                                                         -----------  -----------  ---------------  -----------  ---------------
<S>                                                      <C>          <C>          <C>              <C>          <C>
Staff/executive........................................       1,244          850             68%         1,186             95%
Data processing........................................         896          450             50            596             67
Operations.............................................       7,946        2,280             29          2,549             32
Business lines:
  Retail...............................................      13,216        1,830             14          5,551             42
  Payment Systems......................................         498          250             50            263             53
  Commercial...........................................       2,900          290             10          1,635             56
  Trust................................................       1,300          130             10            459             35
                                                         -----------       -----                    -----------
Total business lines...................................      17,914        2,500             14          7,908             44
                                                         -----------       -----                    -----------
Total FTE..............................................      28,000        6,080             22%        12,239             44%
                                                         -----------       -----                    -----------
                                                         -----------       -----                    -----------
</TABLE>

- ------------------------------
(a)  Determined  by  applying  FBS's  ratio  of  FTE  reductions  to  total cost
     reductions to  Wells Fargo's  anticipated total  cost reductions  in  First
     Interstate's estimated 1996 expense base.

    As  indicated above, FBS  projects that Wells Fargo  would have to terminate
approximately 12,000 First Interstate employees  to achieve its published  level
of  cost reductions. This approach doubles the reductions expected following the
Merger. FBS does not  believe that Wells Fargo  could effectively operate  First
Interstate  with  just  over  half  of  First  Interstate's  current  employees,
particularly when Wells Fargo has  no presence in 12 of  the 13 states in  which
First Interstate conducts business.

    Of  particular note, Wells  Fargo apparently anticipates  eliminating 56% of
First Interstate's  commercial  loan  officers  (1,635  FTEs).  Given  that,  at
September 30, 1995, FBS (pro forma with

                                       28
<PAGE>
FirsTier  Financial, Inc.) had $13.3 billion,  Wells Fargo had $18.5 billion and
First Interstate  had $16.1  billion of  commercial and  commercial real  estate
loans,  it is highly  doubtful that Wells  Fargo could expect  to eliminate more
than five times as many of First Interstate's commercial loan personnel than FBS
without  suffering  serious  client  damage  and  revenue  loss.  Moreover,  the
motivation  for significant  personnel reductions  in an  area that  Wells Fargo
views   as   presenting   "substantial   revenue   growth   opportunities"    is
incomprehensible.

    ANALYSIS  OF NET  CALIFORNIA SAVINGS.   FBS recognizes that,  because of the
branch overlap between  Wells Fargo  and First Interstate  in California  (their
only  common  state  of  operations),  the  Wells  Offer  does  present  certain
efficiencies not relevant  to the Merger.  FBS believes, however,  that the  net
expense  savings that could be  realized by Wells Fargo  because of this overlap
are, in reality, only a  fraction of the amount claimed  by Wells Fargo. As  the
analysis  set  forth below  demonstrates, even  the  most aggressive  program of
cost-cutting by Wells Fargo would not be likely to achieve expense reductions in
excess of $280 million over those that could be achieved in the Merger. Further,
even reductions  at this  level are  likely to  be offset  in large  part by  an
estimated  $180 million in associated revenue losses. Accordingly, Wells Fargo's
annual savings net of revenue loss due  to its overlap in California with  First
Interstate  are likely to  approximate a maximum of  $100 million, one-fourth of
the amount publicized by Wells Fargo.

    In analyzing the competing claims by FBS and Wells Fargo regarding  possible
California  expense  reductions,  it  is  important  to  understand  that  First
Interstate's California  branch  and  business line  expenses  only  total  $495
million.  Wells  Fargo  has  reportedly  stated  that  First  Interstate's total
California expense base is $1 billion. However, approximately one-half of  these
costs  are  charges  originating  from  cost  transfers  from  non-business line
operations. Potential savings in these  operations are already accounted for  in
the  data  processing  and operations  categories  shown in  the  chart entitled
"Projected Expense Reductions."

    Even if Wells Fargo could close every First Interstate branch, it is  wholly
unrealistic  to  expect that  First  Interstate's California  expenses  would be
totally eliminated. Although  branch closings  would eliminate  real estate  and
associated  occupancy costs, the sales and transactions handled by the branches,
and at least  some of  the associated personnel,  must be  moved to  alternative
locations  or other delivery channels if the revenues associated with the closed
branch are  to be  retained.  Simply stated,  Wells Fargo  cannot  realistically
assume  that it can close a branch, totally eliminate the associated expense and
retain the related revenue.

    Because of this fundamental  principle and based  on its recent  acquisition
experience,  FBS estimates that in the extremely unlikely event that Wells Fargo
could close all of First Interstate's California branches, it would eliminate  a
maximum  of 40% of the personnel expense, 100% of the occupancy costs and 40% of
the other expenses associated with such branches, resulting in total savings  of
$275  million. Wells  Fargo has  reportedly asserted that  it will  close 85% of
First Interstate's  California  branches  if  the  Wells  Offer  is  successful.
Assuming  Wells Fargo  could achieve  this aggressive  target, the  related cost
savings would be, at most, $230 million:

                  CALIFORNIA BRANCH AND BUSINESS LINE EXPENSE
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                  TOTAL FIRST            ASSUMED
                                                                                  INTERSTATE         EXPENSE SAVINGS
                                                                                  BRANCH AND     ------------------------
                                                                                 BUSINESS LINE      100%
ITEM                                                                             EXPENSE BASE      CLOSING    85% CLOSING
- ------------------------------------------------------------------------------  ---------------  -----------  -----------
<S>                                                                             <C>              <C>          <C>
Personnel expense.............................................................     $     290      $     115    $      95
Occupancy/equipment expense...................................................           130            130          110
Other expense.................................................................            75             30           25
                                                                                       -----          -----        -----
  Total expense...............................................................     $     495      $     275    $     230
                                                                                       -----          -----        -----
                                                                                       -----          -----        -----
</TABLE>

                                       29
<PAGE>
    Even if Wells Fargo were to achieve an additional $50 million of savings  by
eliminating  one-half of First Interstate's California advertising and marketing
expenses ($20  million)  and  through branch  divestitures  ($30  million),  the
efficiencies  associated with  consolidating the California  operations of Wells
Fargo and  First Interstate  do  not approach  the  $500 million  of  additional
savings  over the cost  reductions associated with the  Merger asserted by Wells
Fargo.

    Moreover, even at the more  realistic level of expense reductions  described
above,  FBS believes the revenue losses associated with combining the California
operations of Wells Fargo and First Interstate would exceed the $100 million per
year projected by Wells Fargo by at least $80 million annually, as shown in  the
following table:

                             ESTIMATED REVENUE LOSS
                             (DOLLARS IN MILLIONS)

<TABLE>
<S>                                                                            <C>
Revenue loss due to deposit attrition (a):
  Lost interest spread (at 3.5% of deposit attrition)........................  $      88
  Lost service charges (at 1.5% of deposit attrition)........................         37
                                                                               ---------
                                                                                     125
Revenue loss due to divestitures (b):
  Lost interest spread (at 4.6% of divested deposits, including an estimated
   1.1% associated with lost loan revenue)...................................         41
  Lost service charges (at 1.5% of divested deposits)........................         14
                                                                               ---------
                                                                                      55
                                                                               ---------
    Estimated revenue loss...................................................  $     180
                                                                               ---------
                                                                               ---------
</TABLE>

- ------------------------------
(a)  Deposit attrition of $2.5 billion is assumed based upon 15% of the deposits
     in closed branches.

(b)  Based  upon the $900 million of  divestitures discussed above. FBS believes
     the actual divestitures could be substantially higher).

    Further losses could be expected  to result from loan attrition,  additional
required divestitures and the hostile nature of the Wells Offer and the negative
public  relations effect of the massive  layoffs and branch closings planned for
California by Wells Fargo  if the Wells Offer  is successful. FBS believes  that
the 15% deposit attrition rate, which corresponds to 12% of the total California
deposit  base of  First Interstate, is  conservative based on  Wells Fargo's own
description of deposit  attrition after  the 1986  Wells Fargo/Crocker  National
Bank  ("Crocker National") transaction. During the two year period following the
announcement of this acquisition, Wells Fargo experienced a 28.1% demand deposit
attrition rate while closing  62% of the branches  of Crocker National. For  all
California  banks  in  this time  period,  demand deposits  increased  2.2%. FBS
believes that  the demand  deposit attrition  rate is  a reliable  indicator  of
account  losses following an acquisition  because demand deposits are considered
to be the  true "core"  customers of  a bank  and generally  represent its  most
profitable  accounts. Accordingly, it is unlikely that an acquiror would, absent
regulatory concerns, intentionally seek to divest them.

                                       30
<PAGE>
                            DEMAND DEPOSIT ATTRITION
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                                           DEMAND
DATE                                                                                                      DEPOSITS
- --------------------------------------------------------------------------------------------------------  ---------
<S>                                                                                                       <C>
December 31, 1985
  Wells Fargo...........................................................................................  $   3,694
  Crocker National......................................................................................      3,655
                                                                                                          ---------
    Total...............................................................................................  $   7,349
                                                                                                          ---------
                                                                                                          ---------
December 31, 1986 consolidated..........................................................................  $   8,029
                                                                                                          ---------
                                                                                                          ---------
December 31, 1987 consolidated..........................................................................  $   6,321
                                                                                                          ---------
                                                                                                          ---------
Decline from December 31, 1985 through December 31, 1987 (a)............................................  $   1,028
                                                                                                          ---------
                                                                                                          ---------
Decline as a percentage of Crocker National baseline deposits...........................................       28.1%
                                                                                                          ---------
                                                                                                          ---------
</TABLE>

- ------------------------------
(a)  Wells Fargo divested approximately $200  million in total deposit  accounts
     in  connection with the Crocker  National transaction. The relative amounts
     of demand deposits and other  deposits composing such divested deposits  is
     not  known. However, even  if the entire $200  million of divested deposits
     were demand  deposits,  the resulting  $828  million of  deposit  attrition
     corresponds  to  a 22.7%  attrition rate  for  the remaining  base deposits
     during the period under consideration.

Source: Documents publicly filed by Wells Fargo.

    Further revenue losses will be incurred as a result of Wells Fargo's planned
branch divestitures. Wells  Fargo's application with  the Federal Reserve  Board
regarding  the  Wells Offer  indicates  that Wells  Fargo  plans to  divest $900
million in  deposits  if  its  proposed transaction  with  First  Interstate  is
consummated.  Using this  assumed $900  million figure,  FBS estimates  that the
planned divestitures  would  result  in expense  savings  of  approximately  $30
million  and  a corresponding  revenue loss  of $55  million. The  net resulting
negative impact from the divested branches is approximately $25 million.

    As a result of the foregoing analysis and as summarized below, FBS  believes
that  the incremental savings attributable to  the overlap in California between
Wells Fargo and First Interstate is $100 million, hundreds of millions less than
the amount claimed by Wells Fargo.

                                       31
<PAGE>
                       ANALYSIS OF NET CALIFORNIA SAVINGS
                             (DOLLARS IN MILLIONS)

<TABLE>
<CAPTION>
                                                                                                             AMOUNT
                                                                                                           -----------
<S>                                                                                                        <C>
Branch closings (85% of First
  Interstate's California branches/offices) (a):
    Expense savings......................................................................................   $     230
    Revenue loss.........................................................................................        (125)
                                                                                                           -----------
      Net expense savings................................................................................         105
                                                                                                           -----------
Marketing/advertising expense reduction (50% of First Interstate total expenses).........................          20
                                                                                                           -----------
Branch divestitures (b):
  Expense savings........................................................................................          30
  Revenue loss...........................................................................................         (55)
                                                                                                           -----------
    Net expense savings..................................................................................         (25)
                                                                                                           -----------
      Subtotal expense savings...........................................................................         280
      Subtotal revenue losses............................................................................        (180)
                                                                                                           -----------
    Total net expense savings............................................................................   $     100
                                                                                                           -----------
                                                                                                           -----------
</TABLE>

- ------------------------------
(a)  Assumes $2.5 billion of  lost deposits (15% of  the deposits in the  closed
     branches),  related interest spreads of 3.5% and service charge revenues of
     1.5% on deposited funds.

(b)  Assumes revenue  losses  on $900  million  of divested  deposits  based  on
     interest  spreads of  3.5% on deposited  funds, service  charge revenues of
     1.5% of deposited funds and associated lost loan revenue approximating 1.1%
     of divested deposits.

    ADDITIONAL REVENUE  SOURCES.    FBS has  conservatively  excluded  from  its
analysis  of the Merger  further sources of  associated incremental revenue. For
example, FBS  believes  that  merging  the  balance  sheets  of  FBS  and  First
Interstate  would immediately generate $44 million in additional revenue 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 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
products 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.  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.

                                       32


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