HUNTINGTON BANCSHARES INC/MD
8-K, 1997-05-07
NATIONAL COMMERCIAL BANKS
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<PAGE>   1



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM 8-K

                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 or 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

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

                           DATE OF REPORT: MAY 5, 1997

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

                       HUNTINGTON BANCSHARES INCORPORATED
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

   Maryland                      0-2525                     31-0724920
- -----------------          ---------------------        ----------------------
(STATE OR OTHER            (COMMISSION FILE NO.)         (IRS EMPLOYER
JURISDICTION OF                                          IDENTIFICATION NUMBER)
INCORPORATION OR
ORGANIZATION)


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

                                Huntington Center
                              41 South High Street
                              Columbus, Ohio 43287
                                 (614) 480-8300
               (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER
                       INCLUDING AREA CODE OF REGISTRANT'S
                          PRINCIPAL EXECUTIVE OFFICES)

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

<PAGE>   2



ITEM  5.  OTHER EVENTS.

         On May 5, 1997, Huntington Bancshares Incorporated, a Maryland
corporation and a registered bank holding company ("Huntington"), and First
Michigan Bank Corporation, a Michigan corporation and a registered bank holding
company ("First Michigan"), entered into an Agreement and Plan of Merger and a
Supplemental Agreement (collectively, the "Merger Agreements") pursuant to which
First Michigan will be merged with and into Huntington (the "Merger"). As a
result of the Merger, each outstanding share of First Michigan's common stock,
$1.00 par value ("First Michigan Common Stock"), will be converted into 1.05
shares of Huntington's common stock, without par value. The Merger is
conditioned upon, among other things, approval by the shareholders of both
Huntington and First Michigan, and receipt of certain regulatory approvals. The
Merger Agreements are attached as Exhibits 2(a) and 2(b) and their terms are
incorporated herein by reference.

         Simultaneously with the execution and delivery of the Merger
Agreements, Huntington and First Michigan entered into a Warrant Purchase
Agreement (the "Warrant Purchase Agreement") pursuant to which First Michigan
issued a Warrant in favor of Huntington (the "Warrant"), to purchase up to
5,268,716 shares of First Michigan Common Stock (representing 19.9% of the
outstanding shares) at a price of $29.275 per share and upon the other terms and
conditions set forth in the Warrant. The Warrant Purchase Agreement and Warrant
are attached as Exhibits 2(c) and 2(d) hereto, respectively, and their terms are
incorporated herein by reference.

         A copy of the Press Release, dated May 5, 1997, issued by Huntington
relating to the Merger is attached as Exhibit 99.

ITEM  7.  FINANCIAL STATEMENTS AND EXHIBITS.

         (c)      Exhibits.

         Exhibit 2(a) -- Agreement and Plan of Merger, dated May 5, 1997,
         between Huntington Bancshares Incorporated and First Michigan Bank
         Corporation.

         Exhibit 2(b) -- Supplemental Agreement, dated May 5, 1997, between
         Huntington Bancshares Incorporated and First Michigan Bank Corporation.

         Exhibit 2(c) -- Warrant Purchase Agreement, dated May 5, 1997, between
         Huntington Bancshares Incorporated and First Michigan Bank Corporation.

         Exhibit 2(d) -- Warrant to Purchase 5,268,716 shares of First Michigan
         Bank Corporation common stock, dated May 5, 1997.

         Exhibit 99 -- Press Release, dated May 5, 1997, relating to the merger
         of First Michigan Bank Corporation with and into Huntington Bancshares
         Incorporated.


<PAGE>   3



                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                    HUNTINGTON BANCSHARES INCORPORATED

Date:    May 7, 1997                By:  /s/ Ralph K. Frasier
                                       ---------------------------------------
                                         Ralph K. Frasier, Secretary and 
                                         General Counsel



<PAGE>   1
                                                                   Exhibit 2(a)

                          AGREEMENT AND PLAN OF MERGER
                          ----------------------------

         THIS AGREEMENT AND PLAN OF MERGER (this "Agreement") is made as of May
5, 1997, between HUNTINGTON BANCSHARES INCORPORATED, a Maryland Corporation
("Huntington"), and FIRST MICHIGAN BANK CORPORATION, a Michigan corporation
("First Michigan"). (Huntington and First Michigan are collectively referred to
herein as the "Constituent Corporations.")

                                    RECITALS:
                                    ---------

         A. Huntington is a corporation organized and existing under the laws of
the State of Maryland and its principal office in the State of Maryland is
located in Baltimore County.

         B. Huntington is authorized to issue a total of 306,617,808 shares of
capital stock, consisting of (i) 300,000,000 shares of common stock, without par
value ("Huntington Common"), of which 144,739,081 shares were issued and
outstanding on April 22, 1997 (exclusive of treasury shares), all of which
shares are entitled to vote on the "Merger," as such term is defined in Article
1 hereof, and (ii) 6,617,808 shares of serial preferred stock, without par
value, none of which was issued and outstanding on April 22, 1997.

         C. First Michigan was incorporated under the Michigan Business 
Corporation Act on August 15, 1973, and currently exists as a corporation under
the laws of Michigan.

         D. First Michigan is authorized to issue 51,000,000 shares of capital
stock, consisting of (i) 50,000,000 shares of common stock, $1.00 par value per
share ("First Michigan Common"), for an aggregate par value of $50,000,000, of
which 26,475,960 shares were issued and outstanding on April 30, 1997
(approximately 27,799,758 shares as adjusted to give effect to a stock dividend
that is payable on May 30, 1997, to holders of First Michigan Common of record
on April 30, 1997) (the "First Michigan 1997 Stock Dividend"), all of which
shares are entitled to vote on the "Merger," as such term is defined in Article
1 hereof, with an additional 999,079 shares of such stock, in the aggregate,
being subject to outstanding stock options previously granted (approximately
1,049,033 shares as adjusted for the First Michigan 1997 Stock Dividend)
(collectively, the "First Michigan Stock Options" and individually, a "First
Michigan Stock Option") under the First Michigan Stock Compensation Plan, the
First Michigan 1997 Director Stock Option Plan, and the First Michigan 1987
Stock Option Plan (collectively, the "First Michigan Stock Option Plans"), and
(ii) 1,000,000 shares of preferred stock, without par value, none of which was
issued and outstanding on April 30, 1997.

         E. The respective Boards of Directors of Huntington and First Michigan
have approved the merger of First Michigan into Huntington upon and subject to
the terms and conditions contained herein.

                                    

<PAGE>   2



                                   AGREEMENT:
                                   ----------
                          
         NOW, THEREFORE, in consideration of the foregoing recitals, which shall
constitute a part of this Agreement, and the mutual promises contained herein,
the parties agree as follows:

                                    ARTICLE 1
                                   THE MERGER
                                   ----------

         Subject to the terms and conditions hereof, and the terms and
conditions contained in a certain Supplemental Agreement, of even date herewith,
among Huntington and First Michigan (the "Supplemental Agreement"), which is
incorporated herein by reference, at the "Effective Time" (as such term is
defined in Article 2 hereof), First Michigan shall be merged into Huntington
(the "Merger"). Huntington shall be the surviving corporation in the Merger (the
"Surviving Corporation"), which shall continue its corporate existence under the
laws of Maryland following the consummation of the Merger. At the Effective
Time, the separate existence and corporate organization of First Michigan shall
cease.

                                    ARTICLE 2
                                 EFFECTIVE TIME
                                 --------------

         The Merger shall be effective at 11:59 p.m., local Ohio time (the
"Effective Time"), on the "Effective Date," which date shall be the latest of
(i) the day on which Articles of Merger with respect to the Merger have been
filed with the Maryland State Department of Assessments and Taxation in
accordance with the requirements of the laws of the State of Maryland, (ii) the
day on which a Certificate of Merger with respect to the Merger has been filed
with the Administrator of the Corporation, Securities and Land Development
Bureau of the Michigan Department of Consumer and Industry Services, in
accordance with the requirements of the laws of the State of Michigan, or (iii)
such later date as may be specified in such Articles and Certificate of Merger;
provided, however, that the Effective Date shall not be earlier than the date of
the expiration of the last required waiting period following receipt of the last
regulatory approval required in order to consummate the Merger. Unless the
parties shall hereafter agree otherwise in writing, the Effective Date shall be
the same day as the "Closing Date," as such term is defined in the Supplemental
Agreement.

                                    ARTICLE 3
                              EFFECT OF THE MERGER
                              --------------------

         3.1      NAME.    The name of the Surviving Corporation shall be 
"Huntington Bancshares Incorporated."

                                      - 2 -


<PAGE>   3



         3.2 ARTICLES OF INCORPORATION. The Articles of Incorporation of
Huntington in effect at the Effective Time shall be the articles of
incorporation of the Surviving Corporation, until amended in accordance with
law.

         3.3 SEPARATE CORPORATE EXISTENCE; ASSETS; LIABILITIES. At the Effective
Time, the effect of the Merger shall be as provided by the applicable provisions
of the laws of Maryland. Without limiting the generality of the foregoing, and
subject thereto, at the Effective Time, (i) the separate existence of First
Michigan shall cease; (ii) all assets and property then owned by each
Constituent Corporation, or which would inure to either of them, including all
real, personal, and mixed property, tangible and intangible assets, choses in
action, rights, and credits, and any legacies which either such Constituent
Corporation would have been capable of taking, shall immediately, by operation
of law, transfer to, vest in, and devolve upon the Surviving Corporation,
without any conveyance or further act or deed; (iii) the Surviving Corporation
shall be liable for all the debts and obligations of each Constituent
Corporation; and (iv) the rights of creditors and any liens on the property or
assets of either Constituent Corporation shall not be impaired.

         3.4 FURTHER ACTIONS. From time to time, as and when requested by the
Surviving Corporation or by its successors, the officers and directors of First
Michigan in office at the Effective Time shall execute and deliver such
instruments and shall take or cause to be taken such further or other action as
shall be necessary in order to vest or perfect in the Surviving Corporation, or
to confirm of record or otherwise, title to, and possession of, all the assets,
property, interests, rights, privileges, immunities, powers, franchises, and
authority of First Michigan and otherwise to carry out the purposes of this
Agreement.

                                    ARTICLE 4
                              CONVERSION OF SHARES
                              --------------------

         4.1      HUNTINGTON COMMON.    All shares of Huntington Common that are
issued and outstanding immediately prior to the Effective Time shall continue to
be issued and outstanding shares of Huntington Common at and after the Effective
Time.

         4.2      FIRST MICHIGAN COMMON.

                  (a) At the Effective Time, the shares of First Michigan Common
issued and outstanding immediately prior to the Effective Time shall be
converted, by virtue of the Merger and without further action on the part of the
holders thereof (collectively, the "First Michigan Shareholders" and,
individually, a "First Michigan Shareholder"), into the right to receive shares
of the Huntington Common, as follows:

                              (i) Subject to adjustment in accordance with
               subparagraph (ii) below, each outstanding share of First Michigan
               Common shall be converted into the right to receive 1.05 shares
               of Huntington Common (the "Conversion Ratio"); provided, however,
               that if both (A) the average of the closing sale prices for a
               share of Huntington Common on the five trading days immediately
               preceding the date that

                                      - 3 -


<PAGE>   4



               is five trading days prior to the Effective Date (the
               "Determination Period"), as reported on the Nasdaq National
               Market (the "Average Closing Sale Price"), is less than $22.86
               (the "Huntington Floor Price"), and (B) the quotient obtained by
               dividing the average of the "Standard & Poors Regional Bank Stock
               Index" (the "S&P Index") for the Determination Period by 355.87
               is greater than the quotient obtained by dividing the Average
               Closing Sale Price by $28.575 (the "Huntington Base Price"), and
               the difference between such quotients is greater than 0.15, then
               the Constituent Corporations shall use their best efforts to
               renegotiate the Conversion Ratio, and if the Constituent
               Corporations are unable to agree on a revised Conversion Ratio,
               then this Agreement and the Supplemental Agreement shall be
               terminated in accordance with the terms of the Supplemental
               Agreement.

                              (ii) If the sum of the number of shares of First
               Michigan Common outstanding at the Effective Time plus the number
               of shares of First Michigan Common that are subject to
               outstanding First Michigan Stock Options as of the Effective Time
               differs from 28,848,791 shares, the Conversion Ratio will be
               automatically adjusted by multiplying the original Conversion
               Ratio by the quotient obtained by dividing 28,848,791 by the sum
               of the number of shares of First Michigan Common issued and
               outstanding on the Effective Date plus the number of shares
               subject to the outstanding First Michigan Stock Options on the
               Effective Date; provided, however, that, in performing any such
               adjustment, the Conversion Ratio will be rounded to the nearest
               hundredth of a share of Huntington Common.

                              (iii) In the event that Huntington changes (or
               establishes a record date for changing) the number of shares of
               Huntington Common issued and outstanding as a result of a stock
               dividend, stock split, recapitalization, or similar transaction
               with respect to the outstanding shares of Huntington Common
               (collectively, a "Huntington Recapitalization"), and the record
               date therefor shall be after the date of this Agreement and prior
               to the Effective Time, then the Conversion Ratio shall be
               adjusted appropriately. In the event of a reclassification of the
               outstanding shares of Huntington Common or a consolidation or
               merger of Huntington with or into another corporation, other than
               a merger in which Huntington is the surviving corporation and
               which does not result in any reclassification, conversion, or
               exchange of shares of Huntington Common, holders of First
               Michigan Common shall receive, in lieu of each share of
               Huntington Common to be issued in exchange for each share or
               portion of a share of First Michigan Common pursuant to the terms
               hereof, the kind and amount of securities, money, property, or
               other consideration receivable upon such reclassification,
               consolidation, or merger by holders of Huntington Common with
               respect to shares of Huntington Common outstanding immediately
               prior to such reclassification, consolidation, or merger.

                              (iv) In the event that a Huntington
               Recapitalization occurs, or Huntington establishes a record date
               for such a Huntington Recapitalization, prior to the expiration
               of the Determination Period, the Huntington Floor Price and the

                                      - 4 -


<PAGE>   5



               Huntington Base Price set forth in the subparagraph (i) above
               shall also be adjusted appropriately.

                              (v) No fractional shares of Huntington Common
               shall be issued. Each holder of First Michigan Common who would
               otherwise be entitled to receive a fractional part of a share of
               Huntington Common shall instead be entitled to receive cash in an
               amount equal to the product resulting from multiplying such
               fraction by the Average Closing Sale Price. No interest shall be
               payable with respect to such cash payment.

                  (b) Any and all shares of First Michigan Common held by First
Michigan, Huntington, or any direct or indirect majority-owned subsidiary of
either of them, in each case other than in a fiduciary capacity or as a result
of debts previously contracted, shall be canceled and retired at the Effective
Time and no consideration shall be issued in exchange therefor.

                  (c) Each unexercised First Michigan Stock Option that is
outstanding immediately prior to the Effective Time shall be converted
automatically at the Effective Time into an option to purchase shares of
Huntington Common under the Huntington 1994 Stock Option Plan or similar
Huntington plan (a "Huntington Stock Option"), with the number of shares of
Huntington Common to be subject to a particular Huntington Stock Option to be
determined by converting the number of shares of First Michigan Common subject
to the First Michigan Stock Option into a number of Huntington Common shares in
accordance with the procedure for converting outstanding First Michigan Common
shares into Huntington Common shares as set forth in paragraph 4.2(a) hereof,
except that all fractional shares will be rounded to the nearest whole share,
and with the exercise price for each share of Huntington Common subject to a
particular Huntington Stock Option to be equal to the exercise price per First
Michigan Common share under the First Michigan Stock Option divided by the
Conversion Ratio determined in accordance with paragraph 4.2(a)(i) above;
provided, however, that, in the case of any First Michigan Stock Option to which
Section 421 of the Internal Revenue Code of 1986, as amended (the "Code"),
applies by reason of its qualification under Section 422 of the Code, the terms
of the Huntington Stock Option into which such First Michigan Stock Option is to
be converted, including the option price, the number of shares of Huntington
Common purchasable pursuant to such option, and the terms and conditions of
exercise of such option, shall be determined so as to comply with Section 424(a)
of the Code. Upon such conversion, all rights under any and all stock options
and stock option plans previously granted or adopted by First Michigan shall
terminate. The Constituent Corporations understand and acknowledge that the
First Michigan Stock Options granted pursuant to the First Michigan Stock
Compensation Plan and the First Michigan 1987 Stock Option Plan will all be
fully vested at or prior to the Effective Time, either by their terms or by
operation of the First Michigan Stock Option Plans as a result of the
consummation of the Merger and effective as of the Effective Time.

                                      - 5 -


<PAGE>   6



                                    ARTICLE 5
                            EXCHANGE OF CERTIFICATES
                            ------------------------

                  (a) As promptly as practicable after the Effective Date but
not later than ten (10) business days after the Effective Date, Huntington shall
cause The Huntington National Bank (the "Exchange Agent") to prepare and mail to
each holder of record on the Effective Date of any shares of First Michigan
Common a letter of transmittal containing instructions for the surrender of all
certificates for shares of First Michigan Common. Upon the surrender by such
holder of a certificate or certificates for shares of First Michigan Common
standing in such holder's name to the Exchange Agent in accordance with the
instructions set forth in the letter of transmittal, such holder shall be
entitled to receive in exchange therefor a certificate representing the number
of whole shares of Huntington Common into which the shares represented by the
certificate or certificates so surrendered shall have been converted and, if
applicable, a check payable to such holder in the amount necessary to pay for
any fractional shares of Huntington Common which such holder would otherwise
have been entitled to receive, in accordance with subsection 4.2(a)(v) hereof.
Huntington shall deliver to the Exchange Agent such share certificates for whole
shares of Huntington Common and the amount of cash necessary to pay for all
fractional shares of Huntington Common in accordance with subsection 4.2(a)(v)
hereof in order to permit the Exchange Agent to promptly deliver such
certificates and cash to the holders of shares of First Michigan Common upon its
receipt of certificates representing shares of First Michigan Common. No
interest shall be payable with respect to either the whole shares of Huntington
Common or the cash payable in lieu of fractional shares. Immediately after the
third anniversary of the Effective Date, the Exchange Agent shall deliver to the
Surviving Corporation any unclaimed balance of cash owing with respect to
fractional shares and such cash shall be retained by, and become the property of
the Surviving Corporation, free and clear of any claims whatsoever.

                  (b) Neither the Surviving Corporation nor the Exchange Agent
shall be obligated to deliver a certificate for Huntington Common or a check for
cash in lieu of fractional shares to a former shareholder of First Michigan
until such former shareholder surrenders the certificate or certificates
representing shares of First Michigan Common standing in such former
shareholder's name or, if such former shareholder is unable to locate such
certificate or certificates, an appropriate affidavit of loss and indemnity
agreement and bond as may be required by Huntington. Until so surrendered, each
outstanding certificate for shares of First Michigan Common shall be deemed for
all corporate purposes (except the payment of dividends) to evidence ownership
of the number of whole shares of Huntington Common into which the shares of
First Michigan Common represented thereby shall have been converted.

                  (c) After the Effective Date, no dividends or distributions
payable to holders of record of Huntington Common shall be paid to any holder of
an outstanding certificate or certificates formerly representing shares of First
Michigan Common until such certificate(s) are surrendered by such holder in
accordance with the terms of this Agreement. Promptly upon surrender of such
outstanding certificate(s), there shall be paid to such holder of the
certificate or certificates for Huntington Common issued in exchange therefor
the amount of dividends and other distributions, if any, which theretofore
became payable with respect to such full shares of Huntington Common, but which
have not theretofore been paid on such stock. No interest shall

                                      - 6 -


<PAGE>   7



be payable with respect to the payment of any dividends or other distributions.
All such dividends or other distributions unclaimed at the end of three years
from the Effective Date shall, to the extent such dividends have been previously
paid to the Exchange Agent, be repaid by the Exchange Agent to Huntington, and
thereafter the holders of such outstanding certificates for First Michigan
Common shall look, subject to applicable escheat, unclaimed funds, and other
laws, only to Huntington as general creditors for payment thereof.

                  (d) The stock transfer books of First Michigan shall be closed
as of the close of business on the day that is one business day prior to the
Effective Date. After such date, there shall be no further registration on the
records of First Michigan of transfers of outstanding certificates formerly
representing shares of First Michigan Common.

                  (e) Huntington is empowered to adopt additional reasonable
rules and regulations with respect to the matters referred to in this Article 5
not inconsistent with the provisions of this Agreement.

                  (f) Adoption of this Agreement by the shareholders of First 
Michigan shall constitute ratification of the appointment of the Exchange Agent.

                                    ARTICLE 6
                              SHAREHOLDER APPROVAL
                              --------------------

         This Agreement shall be submitted to the shareholders of Huntington and
First Michigan for approval in accordance with applicable law and their
respective Governing Documents as soon as reasonably practicable following the
execution of this Agreement.

                                    ARTICLE 7
                            MISCELLANEOUS PROVISIONS
                            ------------------------

         7.1 AMENDMENT. At any time prior to the Effective Time, the parties
hereto may amend, modify, or supplement this Agreement by mutual agreement
authorized by their respective boards of directors, whether before or after the
shareholders of First Michigan have adopted this Agreement, provided that the
number of shares of Huntington Common into which shares of First Michigan Common
are to be converted as determined in paragraph 4.2(a) hereof shall not be
changed after the shareholders of First Michigan have adopted this Agreement
without the approval of such shareholders in the same manner as required for the
adoption of this Agreement; and provided, further, that this Agreement may not
be amended, modified, or supplemented, except by an instrument in writing
executed and delivered by each of the parties hereto.

         7.2 TERMINATION. Unless extended by the mutual agreement of the parties
hereto, this Agreement may be terminated, notwithstanding the adoption thereof
by the shareholders of Huntington or First Michigan in the manner and under the
circumstances set forth in the Supplemental Agreement.

                                      - 7 -


<PAGE>   8



         7.3 ENTIRE AGREEMENT. This Agreement, together with the Supplemental
Agreement and any exhibits hereto or thereto, constitutes the entire agreement
among the parties with respect to the subject matter hereof and thereof and
supersedes all prior agreements and understandings, oral or written, among the
parties with respect to such subject matter and no party shall be liable or
bound to the others in any manner by any covenants, representations, or
warranties except as specifically set forth herein or therein.

         7.4 CAPTIONS. The captions used in this Agreement are used for 
convenience only and are not to be considered in construing or interpreting this
Agreement.

         7.5 ASSIGNMENT. Neither this Agreement nor any rights, interests, or
obligations hereunder shall be assigned or transferred by operation of law or
otherwise by any of the parties hereto without the prior written consent of the
other parties.

         7.6 BENEFIT. Nothing in this Agreement, express or implied, is intended
to confer upon any person or entity other than the parties hereto and their
successors in interest any rights or remedies under or by reason of this
Agreement.

         7.7 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed an original for all purposes, but
such counterparts taken together shall constitute one and the same instrument.

         7.8 GOVERNING LAW. This Agreement shall be construed and enforced in
accordance with the laws of the State of Ohio without regard to its conflict of
laws principles, except to the

                       THIS SPACE INTENTIONALLY LEFT BLANK

                                      - 8 -


<PAGE>   9


extent that Maryland law governs certain aspects of the Merger as it relates to
Huntington or Michigan law governs certain aspects of the Merger as it relates
to First Michigan.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.

                         HUNTINGTON  BANCSHARES  INCORPORATED

                         By: /s/ Frank Wobst
                           ----------------------------------------------------
                              Frank Wobst, Chairman and Chief Executive Officer

                         FIRST MICHIGAN BANK CORPORATION

                         By:    /s/ David M. Ondersma
                            ---------------------------------------------------
                              David M. Ondersma, Chairman and Chief Executive
                              Officer

                                      - 9 -

<PAGE>   1
                                                               Exhibit 2(b)

                             SUPPLEMENTAL AGREEMENT



                                     BETWEEN



                       HUNTINGTON BANCSHARES INCORPORATED



                                       AND



                         FIRST MICHIGAN BANK CORPORATION



                                DATED MAY 5, 1997


<PAGE>   2
<TABLE>
<CAPTION>



                                TABLE OF CONTENTS
<S>      <C>                                                                                             <C>
ARTICLE 1 - DEFINITIONS................................................................................   2
- -----------------------
         1.1      Definitions Contained Elsewhere in this Agreement....................................   2

         1.2      Definitions Contained in the Merger Agreement........................................   2

         1.3      Additional Definitions...............................................................   2

         1.4      Interpretations......................................................................   11

ARTICLE 2 - REPRESENTATIONS AND WARRANTIES OF FIRST MICHIGAN...........................................   11
- ------------------------------------------------------------
         2.1      Organization, Standing, and Power....................................................   11

         2.2      Authority; No Breach By Agreement....................................................   12

         2.3      Capital Stock........................................................................   13

         2.4      First Michigan Subsidiaries..........................................................   13

         2.5      Financial Statements.................................................................   14

         2.6      Absence of Undisclosed Liabilities...................................................   14

         2.7      Absence of Certain Changes or Events.................................................   14

         2.8      Tax Matters..........................................................................   15

         2.9      [Reserved]...........................................................................   16

         2.10     Assets and Insurance.................................................................   16

         2.11     Environmental Matters................................................................   17

         2.12     Compliance with Laws.................................................................   19

         2.13     Labor Relations......................................................................   19

         2.14     Employee Benefit Plans...............................................................   19

         2.15     Material Contracts...................................................................   21
</TABLE>

                                      - i -


<PAGE>   3
<TABLE>


<S>      <C>                                                                                             <C>
         2.16     Legal Proceedings....................................................................   22

         2.17     Reports..............................................................................   23

         2.18     Statements True and Correct..........................................................   23

         2.19     Tax, Regulatory, and Pooling Matters.................................................   23

         2.20     State Takeover Laws..................................................................   24

         2.21     Charter Provisions...................................................................   24

         2.22     Compliance with Certain Laws.........................................................   24

         2.23     Community Reinvestment Act Compliance................................................   24

ARTICLE 3 - REPRESENTATIONS AND WARRANTIES OF HUNTINGTON...............................................   24
- --------------------------------------------------------
         3.1      Organization, Standing, and Power....................................................   24

         3.2      Authority; No Breach By Agreement....................................................   25

         3.3      Capital Stock........................................................................   25

         3.4      Huntington Subsidiaries..............................................................   26

         3.5      Financial Statements.................................................................   27

         3.6      Absence of Undisclosed Liabilities...................................................   27

         3.7      Absence of Certain Changes or Events.................................................   27

         3.8      Tax Matters..........................................................................   27

         3.9      Assets and Insurance.................................................................   28

         3.10     Compliance with Laws  ...............................................................   28

         3.11     Employee Benefit Plans...............................................................   29

         3.12     Legal Proceedings....................................................................   30

         3.13     Reports..............................................................................   30

         3.14     Statements True and Correct..........................................................   31
</TABLE>

                                     - ii -


<PAGE>   4
<TABLE>

<S>      <C>                                                                                             <C>
         3.15     Tax, Regulatory, and Pooling Matters.................................................   31

         3.16     Community Reinvestment Act Compliance................................................   31

ARTICLE 4 - MUTUAL COVENANTS OF THE PARTIES............................................................   32
- -------------------------------------------
         4.1      Adverse Changes in Condition.........................................................   32

         4.2      Reports..............................................................................   32

         4.3      Registration Statement; Proxy Statements; Shareholder Approval.......................   32

         4.4      Applications.........................................................................   33

         4.5      Agreement as to Efforts to Consummate................................................   33

         4.6      Investigation and Confidentiality....................................................   33

         4.7      Press Releases.......................................................................   34

         4.8      Tax and Accounting Treatment.........................................................   34

         4.9      No Rights Triggered..................................................................   34

ARTICLE 5 - COVENANTS OF FIRST MICHIGAN................................................................   34
- ---------------------------------------
         5.1      Conduct of the Business..............................................................   34

         5.2      Negative Covenants of First Michigan.................................................   35

         5.3      Certain Actions......................................................................   37

         5.4      Agreements with Respect to Affiliates................................................   38

         5.5      Certain Policies of First Michigan...................................................   38

         5.6      Agreements with Respect to First Michigan Stock Option Plans.........................   38

ARTICLE 6 - COVENANTS OF HUNTINGTON....................................................................   39
- -----------------------------------
         6.1      Negative Covenants of Huntington.....................................................   39

         6.2      Nasdaq Listing.......................................................................   39

         6.3      Employee Benefits and Contracts......................................................   40
</TABLE>

                                     - iii -


<PAGE>   5
<TABLE>


<S>      <C>                                                                                             <C>
         6.4      Indemnification of Directors and Officers............................................   41

         6.5      Stock Options........................................................................   42

ARTICLE 7 - CONDITIONS PRECEDENT TO OBLIGATIONS TO CONSUMMATE..........................................   42
- -------------------------------------------------------------
         7.1      Conditions to Obligations of Each Party..............................................   42

         7.2      Conditions to Obligations of Huntington..............................................   44

         7.3      Conditions to Obligations of First Michigan..........................................   45

ARTICLE 8 - CLOSING.....................................................................................  46
- -------------------
ARTICLE 9 - TERMINATION................................................................................   46
- -----------------------
         9.1      Termination..........................................................................   46

         9.2      Effect of Termination................................................................   48

         9.3      Non-Survival of Representations and Covenants........................................   48

ARTICLE 10 - MISCELLANEOUS.............................................................................   48
- --------------------------
         10.1     Expenses.............................................................................   48

         10.2     Termination Fee......................................................................   48

         10.3     Brokers and Finders..................................................................   49

         10.4     Entire Agreement.....................................................................   50

         10.5     Amendments...........................................................................   50

         10.6     Waivers..............................................................................   50

         10.7     Assignment...........................................................................   51

         10.8     Notices..............................................................................   51

         10.9     Governing Law........................................................................   52

         10.10    Counterparts.........................................................................   52

         10.11    Captions.............................................................................   52
</TABLE>

                                     - iv -


<PAGE>   6
<TABLE>


<S>      <C>                                                                                             <C>
         10.12    Interpretations......................................................................   52

         10.13    Enforcement of Agreement.............................................................   52

         10.14    Severability.........................................................................   52

         10.15    Benefit..............................................................................   53


EXHIBITS:
- --------
         1        Warrant Purchase Agreement

         2        Matters as to which Varnum, Riddering, Schmidt & Howlett llp Shall Opine

         3        Matters as to which Porter, Wright, Morris & Arthur Shall Opine
</TABLE>

                                      - v -


<PAGE>   7



                             SUPPLEMENTAL AGREEMENT
                             ----------------------

         THIS SUPPLEMENTAL AGREEMENT (this "Agreement") is made and entered into
as of May 5, 1997, by and among FIRST MICHIGAN BANK CORPORATION ("First
Michigan"), a Michigan corporation having its principal office located in
Holland, Michigan; and HUNTINGTON BANCSHARES INCORPORATED ("Huntington"), a
Maryland corporation having its principal office located in Columbus, Ohio.

                                    RECITALS:
                                    ---------

         A. Huntington is a registered bank holding company under the BHC Act.

         B. First Michigan is a registered bank holding company under the BHC 
            Act.

         C. Concurrently with the execution and delivery of this Agreement, the
Parties are entering into (i) an Agreement and Plan of Merger (the "Merger
Agreement"), which provides for the merger of First Michigan into Huntington in
accordance with the terms and conditions contained in the Merger Agreement and
in this Agreement (the "Merger"), (ii) a certain Warrant Purchase Agreement, in
the form attached as Exhibit 1 hereto (the "Warrant Purchase Agreement"), and
(iii) a certain Warrant, in the form attached as Attachment A to the Warrant
Purchase Agreement (the "Warrant"). (This Agreement, together with the Merger
Agreement, the Warrant Purchase Agreement, and the Warrant are sometimes
hereinafter collectively referred to as the "Merger Documents.")

         D. The Parties desire to enter into this Agreement for the purpose of
setting forth certain representations, warranties, and covenants made by each
party as an inducement to the other parties to execute and deliver the Merger
Agreement and to consummate the Merger and to set forth certain additional terms
and conditions applicable to the Merger.

                                   AGREEMENT:
                                   ----------

         NOW, THEREFORE, in consideration of the above recitals and the mutual
warranties, representations, covenants, and agreements set forth herein, the
Parties agree as follows:

                                      - 1 -


<PAGE>   8



                                    ARTICLE 1
                                             

                                   DEFINITIONS
                                   -----------

         1.1      DEFINITIONS CONTAINED ELSEWHERE IN THIS AGREEMENT.    For 
purposes of this Agreement, the following terms shall have the meanings ascribed
to them in the Preamble or Recitals of this Agreement:

         this "AGREEMENT";

         "FIRST MICHIGAN";

         "HUNTINGTON";

         the "MERGER";

         the "MERGER AGREEMENT";

         the "MERGER DOCUMENTS";

         the "WARRANT";

         the "WARRANT PURCHASE AGREEMENT";

         1.2      DEFINITIONS CONTAINED IN THE MERGER AGREEMENT.   For purposes
of this Agreement, the following terms shall have the meanings ascribed to them
in the Merger Agreement:

         the "EFFECTIVE DATE";

         the "EFFECTIVE TIME";

         "FIRST MICHIGAN COMMON";

         the "FIRST MICHIGAN 1997 STOCK DIVIDEND";

         the "FIRST MICHIGAN STOCK OPTION PLANS";

         the "FIRST MICHIGAN STOCK OPTIONS";

         "HUNTINGTON COMMON"; and

         the "SURVIVING CORPORATION";

         1.3      ADDITIONAL DEFINITIONS.    For purposes of this Agreement, 
the following terms shall have the following meanings:

                                      - 2 -


<PAGE>   9



         "ACQUISITION TRANSACTION" shall mean a transaction involving (A) the
sale or other disposition of more than 20 percent of the shares of the capital
stock or any other class of voting securities of First Michigan, including, but
not limited to, a Tender Offer, involving any Person other than Huntington or a
Huntington Affiliate, (B) the sale or other disposition of 15 percent or more of
the consolidated assets or deposits of First Michigan or of the banks owned by
First Michigan, in the aggregate, to any Person other than Huntington or a
Huntington Affiliate, or (C) a merger or consolidation involving First Michigan
and any Person other than Huntington or a Huntington Affiliate, other than a
transaction pursuant to which First Michigan will be the surviving corporation
and the current shareholders of First Michigan will be the owners of a majority
of the stock of the surviving corporation following the transaction.

         "AFFILIATE" of a Person shall mean: (i) any other Person directly, or
indirectly through one or more intermediaries, controlling, controlled by or
under common control with such Person; (ii) any officer, director, partner,
employer, or direct or indirect beneficial owner of any 10% or greater equity or
voting interest of such Person; or (iii) any other Person for which a Person
described in clause (ii) acts in any such capacity.

         "ASSETS" of a Person shall mean all of the assets, properties,
businesses and rights of such Person of every kind, nature, character and
description, whether real, personal or mixed, tangible or intangible, accrued or
contingent, or otherwise relating to or utilized in such Person's business,
directly or indirectly, in whole or in part, whether or not carried on the books
and records of such Person, and whether or not owned in the name of such Person
or any Affiliate of such Person and wherever located.

         "BHC ACT" shall mean the federal Bank Holding Company Act of 1956, as
amended.

         "CERCLA" shall mean the Comprehensive Environmental Response
Compensation and Liability Act, as amended, 42 U.S.C. 9601, et seq.

         "CONSENT" shall mean any consent, approval, authorization, clearance,
exemption, waiver, or similar affirmation by any Person pursuant to any
Contract, Law, Order, or Permit.

         "CONTRACT" shall mean any written or oral agreement, arrangement,
authorization, commitment, contract, indenture, instrument, lease, obligation,
plan, practice, restriction, understanding or undertaking of any kind or
character, or other document to which any Person is a party or that is binding
on any Person or its capital stock, Assets, or business.

                                      - 3 -


<PAGE>   10



         "DEFAULT" shall mean (i) any breach or violation of or default under
any Contract, Order or Permit, (ii) any occurrence of any event that with the
passage of time or the giving of notice or both would constitute a breach or
violation of or default under any Contract, Order or Permit, or (iii) any
occurrence of any event that with or without the passage of time or the giving
of notice would give rise to a right to terminate or revoke, change the current
terms of, or renegotiate, or to accelerate, increase, or impose any Liability
under, any Contract, Order or Permit, where, in any such event, such Default is
reasonably likely to have, individually or in the aggregate, a Material Adverse
Effect on a Party.

         "DISCLOSURE MEMORANDUM" shall mean the written information entitled
"Disclosure Memorandum" delivered by First Michigan to Huntington prior to the
date of this Agreement identifying the matters contained therein and, with
respect to each disclosure made therein, specifically referencing each Section
of this Agreement under which such disclosure is being made. Information
disclosed with respect to one Section shall not be deemed to be disclosed for
purposes of any other Section not specifically referenced with respect thereto.

         "EMPLOYEE BENEFIT PLAN" of a Party shall mean any and all employee
benefit plans of such Party as defined in ERISA, including, but not limited to,
and all pension, retirement, profit-sharing, deferred compensation, stock
option, employee stock ownership, severance pay, vacation, bonus, or other
incentive plans, all other written employee programs, arrangements, or
agreements, all medical, vision, dental, or other health plans, all life
insurance plans, and all other employee benefit plans or fringe benefit plans,
currently adopted, maintained by, sponsored in whole or in part by, or
contributed to by a Party or any Subsidiary thereof for the benefit of
employees, retirees, dependents, spouses, directors, independent contractors, or
other beneficiaries and under which employees, retirees, dependents, spouses,
directors, independent contractors, or other beneficiaries are eligible to
participate.

         "ENVIRONMENTAL LAWS" shall mean all Laws relating to pollution or
protection of human health or the environment (including ambient air, surface
water, ground water, land surface or subsurface strata) and which are
administered, interpreted or enforced by the United States Environmental
Protection Agency and state and local agencies with jurisdiction over, and
including common law in respect of, pollution or protection of the environment,
including CERCLA, RCRA, and other Laws relating to emissions, discharges,
releases or threatened releases of any Hazardous Substance, or otherwise
relating to the manufacture, processing, distribution, use, treatment, storage,
disposal, transport or handling of any Hazardous Substance.

         "ERISA" shall mean the Employee Retirement Income Security Act of 1974,
as amended.

                                      - 4 -


<PAGE>   11



         "ERISA AFFILIATE" shall have the meaning provided in Section 2.14 of
this Agreement.

         "ERISA PLAN" of a Party shall mean an Employee Benefit Plan of that
Party or any Subsidiary of such Party which is an "employee pension benefit
plan," as that term is defined in Section 3(2) of ERISA

         "EXHIBITS" 1 through 3, inclusive, shall mean the Exhibits so marked,
copies of which are attached to this Agreement. Such Exhibits are hereby
incorporated by reference herein and made a part hereof, and may be referred to
in this Agreement and any other related instrument or document without being
attached hereto.

         "FDIC" shall mean the Federal Deposit Insurance Corporation.

         "FIRST MICHIGAN BONUS PLAN" shall mean the First Michigan Management
Bonus Plan, as in effect as of the date of this Agreement.

         "FIRST MICHIGAN BONUS PLAN PARTICIPANTS" shall mean all employees of
First Michigan who are participants in the First Michigan Bonus Plan on the
Effective Date, in accordance with the terms of the First Michigan Bonus Plan.

         "FIRST MICHIGAN BONUS POOL" shall mean the estimated aggregate dollar
amount that would be or become payable under the First Michigan Bonus Plan for
the entire 1997 calendar year, in the agreed amount of $3,400,000 (which amount
was calculated without regard to any accounting or accrual adjustments that may
be required under or resulting from the Merger Documents or the transactions
contemplated thereby), multiplied by a fraction, the numerator of which is the
number of days between January 1, 1997, and the Effective Date (inclusive), and
the denominator of which is 365.

         "FIRST MICHIGAN COMPANIES" shall mean, collectively, First Michigan and
all First Michigan Subsidiaries.

         "FIRST MICHIGAN FINANCIAL STATEMENTS" shall mean (i) the consolidated
balance sheets of First Michigan (including related notes and schedules, if any)
as of December 31, 1996 and 1995, and the related statements of income, changes
in shareholders' equity, and cash flows (including related notes and schedules,
if any) for each of the three years ended December 31, 1996, 1995, and 1994,
with the report thereon of BDO Seidman, LLP, as filed by First Michigan in SEC
Documents, and (ii) the unaudited consolidated balance sheets of First Michigan
(including related notes and schedules, if any), and the related statements of
income, changes in shareholders' equity, and cash flows (including related notes
and schedules, if any) included in SEC Documents filed by First Michigan with
respect to periods ended subsequent to December 31, 1996.

                                      - 5 -


<PAGE>   12



         "FIRST MICHIGAN RIGHTS AGREEMENT" shall mean the Shareholder Protection
Rights Agreement of First Michigan Bank Corporation dated October 11, 1990, as
amended.

         "FIRST MICHIGAN SUBSIDIARIES" shall mean the Subsidiaries of First
Michigan, which shall include the First Michigan Subsidiaries described in
Section 2.4 of the Disclosure Memorandum and any corporation, bank, savings
association, or other organization acquired as a Subsidiary of First Michigan
after the date of this Agreement and owned by First Michigan at the Effective
Time.

         "GAAP" shall mean generally accepted accounting principles,
consistently applied during the periods involved.

         "GOVERNING DOCUMENTS" of a Person shall mean, collectively, the
charter, articles of incorporation, certificate of incorporation, bylaws, and
regulations, as applicable, of such Person and any and all other documents
governing the internal affairs of such Person.

         "HAZARDOUS SUBSTANCE" shall mean (i) any hazardous substance, hazardous
material, hazardous waste, regulated substance or toxic substance (as those
terms are defined by any applicable Environmental Laws) and (ii) any chemicals,
pollutants, contaminants, petroleum, petroleum products, or oil (and
specifically shall include asbestos requiring abatement, removal or
encapsulation pursuant to the requirements of governmental authorities and any
polychlorinated biphenyls).

         "HSR ACT" shall mean Section 7A of the Clayton Act, as added by Title
II of the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and
the rules and regulations promulgated thereunder.

         "HUNTINGTON CAPITAL STOCK" shall mean, collectively, the Huntington
Common, the Huntington Preferred Stock and any other class or series of capital
stock of Huntington.

         "HUNTINGTON COMPANIES" shall mean, collectively, Huntington and all
Huntington Subsidiaries.

         "HUNTINGTON FINANCIAL STATEMENTS" shall mean (i) the consolidated
balance sheets of Huntington (including related notes and schedules, if any) as
of December 31, 1996 and 1995, and the related statements of income, changes in
shareholders' equity, and cash flows (including related notes and schedules, if
any) for each of the three years ended December 31, 1996, 1995, and 1994, with
the report thereon of Ernst & Young LLP, as filed by Huntington in SEC
Documents, and (ii) the unaudited consolidated balance sheets of Huntington
(including related notes and schedules, if any) and related statements of
income, changes in shareholders' equity,

                                      - 6 -


<PAGE>   13



and cash flows (including related notes and schedules, if any) included in SEC
Documents filed with respect to periods ended subsequent to December 31, 1996.

         "HUNTINGTON PREFERRED STOCK" shall mean the "blank" serial preferred
stock of Huntington, without par value.

         "HUNTINGTON RIGHTS" shall mean the preferred stock purchase rights
issued pursuant to the Huntington Rights Agreement.

         "HUNTINGTON RIGHTS AGREEMENT" shall mean that certain Rights Agreement;
dated as of February 22, 1990, as amended, between Huntington and The Huntington
Trust Company, N.A., as Rights Agent.

         "HUNTINGTON SUBSIDIARIES" shall mean the Subsidiaries of Huntington,
whether currently a Subsidiary of Huntington or acquired as a Subsidiary of
Huntington after the date of this Agreement and owned by Huntington at the
Effective Time.

         "INTERNAL REVENUE CODE" shall mean the Internal Revenue Code of 1986,
as amended, and the rules and regulations promulgated thereunder.

          "KNOWLEDGE" as used with respect to a Person (including references to
such Person being aware of a particular matter) shall mean those facts that are
known or should reasonably have been known by the Chairman, President, Chief
Financial Officer, Chief Accounting Officer, Chief Credit Officer, ("in-house")
General Counsel, any ("in-house") Assistant or Deputy General Counsel, or any
Senior or Executive Vice President of such Person.

         "LAW" shall mean any code, law, ordinance, regulation, reporting or
licensing requirement, rule, or statute applicable to a Person or its Assets,
Liabilities or business, including those promulgated, interpreted or enforced by
any Regulatory Authority.

         "LIABILITY" shall mean any direct or indirect, primary or secondary,
liability, indebtedness, obligation, penalty, cost or expense (including costs
of investigation, collection and defense), claim, deficiency, guaranty or
endorsement of or by any Person (other than endorsements of notes, bills,
checks, and drafts presented for collection or deposit in the ordinary course of
business) of any type, whether accrued, absolute or contingent, liquidated or
unliquidated, matured or unmatured, or otherwise.

         "LIEN" shall mean any conditional sale agreement, default of title,
easement, encroachment, encumbrance, hypothecation, infringement, lien,
mortgage, pledge, reservation, restriction, security interest, title retention
or other security arrangement, or any adverse right or interest, charge, or
claim of any nature whatsoever of, on, or

                                      - 7 -


<PAGE>   14



with respect to any property or property interest, other than (i) Liens for
current property Taxes not yet due and payable, (ii) for depository institution
Subsidiaries of a Party, pledges to secure deposits and other Liens incurred in
the ordinary course of banking business, and (iii) Liens which are not
reasonably likely to have, individually or in the aggregate, a Material Adverse
Effect on a Party.

         "LITIGATION" shall mean any action, arbitration, cause of action,
claim, com plaint, criminal prosecution, governmental or other examination or
investigation, hearing, inquiry, administrative or other proceeding, by any
Person alleging potential Liability, but shall not include regular, periodic
examinations of depository institutions and their Affiliates by Regulatory
Authorities.

         "LOAN PROPERTY" shall mean any property owned by the Party in question
or by any of its Subsidiaries or in which such Party or Subsidiary holds a
security interest, and, where required by the context, includes the owner or
operator of such property, but only with respect to such property.

         "MATERIAL" for purposes of this Agreement shall be determined in light
of the facts and circumstances of the matter in question; provided that any
specific monetary amount stated in this Agreement shall determine materiality in
that instance.

         "MATERIAL ADVERSE EFFECT" on a Party shall mean an event, change or
occurrence which, individually or together with any other event, change or
occurrence, has a material adverse impact on (i) the financial position,
business, or results of operations of such Party and its Subsidiaries, taken as
a whole, or (ii) the ability of such Party to perform its obligations under the
Merger Documents or to consummate the Merger or the other transactions
contemplated thereby, provided that "material adverse impact" shall not be
deemed to include the impact of (x) changes in banking and similar Laws of
general applicability or interpretations thereof by courts or governmental
authorities, (y) changes in generally accepted accounting principles or
regulatory accounting principles generally applicable to banks and their holding
companies, and (z) the Merger and compliance with the provisions of the Merger
Documents on the operating performance of the Parties.

         "MERGER AGREEMENT" shall mean the Agreement and Plan of Merger,
including the Exhibits delivered pursuant hereto and incorporated herein by
reference.

         "NASD" shall mean the National Association of Securities Dealers, Inc.

         "NASDAQ NATIONAL MARKET" shall mean the National Market System of the
National Association of Securities Dealers Automated Quotations System.

         "1933 ACT" shall mean the Securities Act of 1933, as amended.

                                      - 8 -


<PAGE>   15



         "1934 ACT" shall mean the Securities Exchange Act of 1934, as amended.

         "OCC" shall mean the Office of the Comptroller of the Currency.

         "OPERATIONAL REAL PROPERTY" shall mean the Real Property owned or
leased by any First Michigan Company and used in the operation of its business.

         "ORDER" shall mean any administrative decision or award, decree,
injunction, judgment, order, quasi-judicial decision or award, ruling, or writ
of any federal, state, local or foreign or other court, arbitrator, mediator,
tribunal, administrative agency or Regulatory Authority.

         "PARTICIPATION FACILITY" shall mean any facility or property in which
the Party in question or any of its Subsidiaries participates in the
"management," as such term is defined in CERCLA, and, where required by the
context, said term means the owner or operator of such facility or property, but
only with respect to such facility or property.

         "PARTY" shall mean either First Michigan or Huntington, and "Parties"
shall mean both First Michigan and Huntington.

         "PENSION PLAN" of a Party shall mean any ERISA Plan of that Party or
any Subsidiary of such Party which is also a "defined benefit plan" (as defined
in Section 414(j) of the Internal Revenue Code).

         "PERMIT" shall mean any federal, state, local, and foreign governmental
approval, authorization, certificate, easement, filing, franchise, license,
notice, permit, or right to which any Person is a party or that is or may be
binding upon or inure to the benefit of any Person or its securities, Assets or
business.

         "PERSON" shall mean a natural person or any legal, commercial or
governmental entity, such as, but not limited to, a corporation, general
partnership, joint venture, limited partnership, limited liability company,
trust, business association, group acting in concert, or any person acting in a
representative capacity.

         "PROXY STATEMENT" shall mean the proxy statement used by First Michigan
or Huntington respectively to solicit the approval of its shareholders of the
transactions contemplated by the Merger Documents which, in the case of First
Michigan, shall include the prospectus of Huntington relating to the issuance of
shares of Huntington Common to holders of shares of First Michigan Common.

         "RCRA" shall mean the Resource Conservation and Recovery Act, as
amended, 42 U.S.C. 6901, et seq.

                                      - 9 -


<PAGE>   16



         "REAL PROPERTY" shall mean any and all real property owned or leased by
any First Michigan Company.

         "REGISTRATION STATEMENT" shall mean the Registration Statement on Form
S-4, or other appropriate form, including any pre-effective or post-effective
amendments or supplements thereto, filed with the SEC by Huntington under the
1933 Act with respect to the shares of Huntington Common to be issued to the
shareholders of First Michigan in the Merger.

         "REGULATORY AUTHORITIES" shall mean, collectively, the United States
Department of Justice, the Board of the Governors of the Federal Reserve System,
the FDIC, the OCC, the Michigan Financial Institutions Bureau, all other state
regulatory agencies having jurisdiction over the Parties and their respective
Subsidiaries, the NASD, and the SEC.

         "REPRESENTATIVE" shall mean any investment banker, financial advisor,
attorney, accountant, consultant, or other representative of a Person.

         "RIGHTS" shall mean all arrangements, calls, commitments, Contracts,
options, rights to subscribe to, scrip, understandings, warrants, or other
binding obligations of any character whatsoever relating to, or securities or
rights convertible into or exchangeable for, shares of the capital stock of a
Person or by which a Person is or may be bound to issue additional shares of its
capital stock or other Rights.

         "SEC" shall mean the Securities and Exchange Commission.

         "SEC DOCUMENTS" shall mean all forms, proxy statements, registration
statements, reports, schedules, and other documents filed, or required to be
filed, by a Party or any of its Subsidiaries with any Regulatory Authority
pursuant to the Securities Laws.

         "SECURITIES LAWS" shall mean the 1933 Act, the 1934 Act, the Investment
Company Act of 1940, as amended, the Investment Advisors Act of 1940, as
amended, the Trust Indenture Act of 1939, as amended, and the rules and
regulations of any Regulatory Authority promulgated thereunder, and the blue
sky, securities, or similar laws of the various states, as applicable.

         "SHAREHOLDERS' MEETING" of a Party shall mean the meeting of the
shareholders of such Party to be held pursuant to Section 4.3 of this Agreement,
including any adjournment or adjournments thereof.

         "SUBSIDIARIES" of a Party shall mean all those corporations, banks,
associations, or other entities of which the Party owns or controls 50% or more
of the outstanding equity securities either directly or through an unbroken
chain of entities as to each of which 50% or more of the outstanding equity
securities is owned

                                     - 10 -


<PAGE>   17



directly or indirectly by its parent; provided, there shall not be included any
such entity acquired through foreclosure or any such entity the equity
securities of which are owned or controlled in a fiduciary capacity.

         "TAX" or "TAXES" shall mean any federal, state, county, local, or
foreign income, profits, franchise, gross receipts, payroll, sales, employment,
use, property, withholding, excise, occupancy, and other taxes, assessments,
charges, fares, or impositions, including interest, penalties, and additions
imposed thereon or with respect thereto.

         "TENDER OFFER" shall mean a tender or exchange offer made by any Person
other than Huntington or an Affiliate of Huntington to acquire equity securities
of First Michigan if, upon the completion of the transactions proposed in such
offer, such Person would own or have the right to acquire beneficial ownership
of more than 20 percent of the capital stock or any other class of voting
securities of First Michigan.

         1.4 INTERPRETATIONS. Any singular term in this Agreement shall be
deemed to include the plural, and any plural term the singular. Whenever the
words "include," "includes" or "including" are used in this Agreement, they
shall be deemed followed by the words "without limitation."

                                    ARTICLE 2
                REPRESENTATIONS AND WARRANTIES OF FIRST MICHIGAN
                ------------------------------------------------

         First Michigan hereby represents and warrants to Huntington as follows:

         2.1      ORGANIZATION, STANDING, AND POWER.

                  (a) First Michigan is duly registered as a bank holding
company under the BHC Act. Each of the First Michigan Companies is organized,
validly existing, and in good standing under the Laws of the United States or
its respective state of incorporation or formation and has the corporate power
and authority necessary to carry on its business as now conducted and to own,
lease, and operate its material Assets. Each First Michigan Company is duly
qualified or licensed to transact business as a foreign corporation in good
standing in the States of the United States and foreign jurisdictions where the
character of its Assets or the nature or conduct of its business requires it to
be so qualified or licensed, except for such jurisdictions in which the failure
to be so qualified or licensed is not reasonably likely to have, individually or
in the aggregate, a Material Adverse Effect on First Michigan.

                  (b) The Disclosure Memorandum contains true and complete 
copies of all of the Governing Documents of First Michigan.

                                     - 11 -


<PAGE>   18



                  (c) The minute books of First Michigan accurately reflect in
all material respects all corporate meetings held or actions taken since January
1, 1996, by the shareholders or Board of Directors of First Michigan.

         2.2      AUTHORITY; NO BREACH BY AGREEMENT.

                  (a) First Michigan has the corporate power and authority
necessary to execute, deliver, and perform its obligations under the Merger
Documents and to consummate the transactions contemplated thereby. The
execution, delivery, and performance of the Merger Documents and the
consummation of the transactions contemplated therein, including the Merger,
have been duly and validly authorized by all necessary corporate action in
respect thereof on the part of First Michigan, subject to the approval of the
Merger Agreement and this Agreement by a two-thirds majority of the outstanding
shares of First Michigan Common, which is the only shareholder vote required for
approval of the Merger Documents and the consummation of the Merger by First
Michigan. Subject to such requisite shareholder approval, the Merger Documents
represent the legal, valid, and binding obligations of First Michigan,
enforceable against First Michigan in accordance with their respective terms
(except in all cases as such enforceability may be limited by applicable
bankruptcy, insolvency, receivership, conservatorship, reorganization,
moratorium, or similar Laws affecting the enforcement of creditors' rights
generally and except that the availability of the equitable remedy of specific
performance or injunctive relief is subject to the discretion of the court
before which any proceeding may be brought).

                  (b) Except as disclosed in Section 2.2 of the Disclosure
Memorandum, neither the execution and delivery of the Merger Documents by First
Michigan nor the consummation by First Michigan of the transactions contemplated
thereby, nor compliance by First Michigan with any of the provisions thereof,
will (i) conflict with or result in a breach of any provision of First
Michigan's Governing Documents, or (ii) constitute or result in a Default under,
or require any Consent pursuant to, or result in the creation of any Lien on any
Asset of any First Michigan Company, under any material Contract or Permit of
any First Michigan Company, or (iii) subject to receipt of the requisite
approvals referred to in Section 7.1(a) and (b) of this Agreement, violate any
Law or Order applicable to any First Michigan Company or any of their respective
material Assets.

                  (c) Other than in connection or compliance with the provisions
of applicable state corporate and Securities Laws and rules of the NASD, and
other than Consents required from Regulatory Authorities, and other than notices
to or filings with the Internal Revenue Service or the Pension Benefit Guaranty
Corporation with respect to any Employee Benefit Plans, or under the HSR Act, no
notice to, filing with, or Consent of, any public body or authority is necessary
for the consummation by First Michigan of the Merger and the other transactions
contemplated in the Merger Documents.

                                     - 12 -


<PAGE>   19



         2.3      CAPITAL STOCK.

                  (a) The authorized capital stock of First Michigan consists of
50,000,000 shares of First Michigan Common, 26,475,960 of which are issued and
outstanding as of the date of this Agreement (approximately 27,799,758 shares as
adjusted to give effect to the First Michigan 1997 Stock Dividend) and 1,000,000
shares of preferred stock, without par value, none of which was outstanding on
the date of this Agreement. All of the issued and outstanding shares of First
Michigan Common are duly and validly issued and outstanding and are fully paid
and nonassessable. None of the outstanding shares of capital stock of First
Michigan has been issued in violation of any preemptive rights of the current or
past shareholders of First Michigan. First Michigan has reserved 1,139,079
shares of First Michigan Common for issuance under the First Michigan Stock
Option Plans (approximately 1,196,033 shares as adjusted to give effect to the
First Michigan 1997 Stock Dividend), pursuant to which options to purchase not
more than 999,079 shares (approximately 1,049,033 shares as adjusted to give
effect to the First Michigan 1997 Stock Dividend) of First Michigan Common are
outstanding.

                  (b) Except for the Warrant, the Warrant Purchase Agreement,
and the First Michigan Rights Agreement, and except as set forth in Section
2.3(a) of this Agreement or as disclosed in Section 2.3 of the Disclosure
Memorandum, there are no shares of capital stock or other equity securities of
First Michigan outstanding and no outstanding Rights relating to the capital
stock of First Michigan. The execution and delivery of the Merger Documents does
not, and the consummation of the Merger and the other transactions contemplated
by the Merger Documents will not (i) result in the grant of any Rights to any
Person under the First Michigan Rights Agreement, (ii) result in separation from
the shares of First Michigan Common of the Rights granted under the First
Michigan Rights Agreement, (iii) permit any holder of any of the Rights under
the First Michigan Rights Agreement to exercise any such Rights, or (iv) give
any Person any Right to purchase any securities issued by Huntington, including,
without limitation, any Rights as a result of a "Flip-over Transaction or Event"
under Section 3.2 of the First Michigan Rights Agreement. First Michigan and
FMB-First Michigan Bank and FMB-Trust, as Rights Agents, have properly
authorized and executed a certain Amendment to Shareholder Protection Rights
Agreement, dated as of the date of this Agreement, but executed prior to the
execution of this Agreement, a copy of which has been furnished to Huntington.

         2.4 FIRST MICHIGAN SUBSIDIARIES. Section 2.4 of the Disclosure
Memorandum contains a true and complete list of all of the First Michigan
Subsidiaries as of the date of this Agreement. Fifteen of the First Michigan
Subsidiaries are state banks chartered under Michigan Law (the "First Michigan
Banks"). Except as disclosed in Section 2.4 of the Disclosure Memorandum, First
Michigan or one of its Subsidiaries owns all of the issued and outstanding
shares of capital stock of each First Michigan Subsidiary. No equity securities
of any First Michigan Subsidiary are or may become required to be issued by
reason of any Rights, and there are no Contracts by which any First Michigan
Subsidiary is bound to issue additional shares of its capital stock or Rights.
There are no Contracts relating to the rights of any First Michigan Company to
vote or to dispose of any shares of the capital stock of any First Michigan
Subsidiary. All of the shares of capital stock of each First Michigan Subsidiary
held by a First Michigan Company are fully paid and, except pursuant to Section
201 of the Michigan Banking Code in the case of the First Michigan Banks, are
owned by

                                     - 13 -


<PAGE>   20



the First Michigan Company free and clear of any Lien. Each of the First
Michigan Banks except FMB-Trust is an "insured institution," as defined in the
Federal Deposit Insurance Act and applicable regulations thereunder, and the
deposits in which are insured by the Bank Insurance Fund.

         2.5 FINANCIAL STATEMENTS. First Michigan has delivered to Huntington
copies of all First Michigan Financial Statements for periods ended prior to the
date hereof and will deliver to Huntington copies of all First Michigan
Financial Statements prepared subsequent to the date hereof. The First Michigan
Financial Statements (as of the dates thereof and for the periods covered
thereby) (i) are, or if dated after the date of this Agreement, will be, in
accordance with the books and records of First Michigan, which are or will be,
as the case may be, complete and correct in all material respects and which have
been or will have been, as the case may be, maintained in accordance with good
business practices, and (ii) present or will present, as the case may be, fairly
the consolidated financial position of First Michigan as of the dates indicated
and the consolidated results of operations, changes in shareholders' equity, and
cash flows of First Michigan for the periods indicated, in accordance with GAAP
or regulatory accounting principles applicable to bank holding companies
generally (subject to any exceptions as to consistency specified therein or as
may be indicated in the notes thereto or, in the case of interim financial
statements, subject to normal recurring year-end and audit adjustments that are
not material in amount or effect).

         2.6 ABSENCE OF UNDISCLOSED LIABILITIES. Except as disclosed in Section
2.6 of the Disclosure Memorandum, as of December 31, 1996, no First Michigan
Company had any Liabilities that are reasonably likely to have, individually or
in the aggregate, a Material Adverse Effect on First Michigan, except
Liabilities which were accrued or reserved against in the consolidated balance
sheets of First Michigan as of December 31, 1996, included in the First Michigan
Financial Statements. Except as disclosed in Section 2.6 of the Disclosure
Memorandum, no First Michigan Company has incurred or paid any Liability since
December 31, 1996, except for (i) such Liabilities incurred or paid in the
ordinary course of business consistent with past business practice and which are
not reasonably likely to have, individually or in the aggregate, a Material
Adverse Effect on First Michigan, (ii) such Liabilities that are expressly
permitted hereunder, and (iii) such Liabilities incurred in connection with the
negotiation and consummation of the transactions contemplated hereunder.

         2.7 ABSENCE OF CERTAIN CHANGES OR EVENTS. Except as disclosed in the
First Michigan Financial Statements delivered prior to the date of this
Agreement or as disclosed in Section 2.7 of the Disclosure Memorandum, since
December 31, 1996, (i) there have been no events, changes, or occurrences which
have had, or are reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on First Michigan, and (ii) First Michigan has not taken
any action, or failed to take any action, prior to the date of this Agreement,
which action or failure, if taken or occurring after the date of this Agreement,
would represent or result in a material breach or violation of any of the
covenants or agreements of First Michigan provided in this Agreement.
Specifically, but without in any way limiting the foregoing, except as described
in Section 2.7 of the Disclosure Memorandum, since December 31, 1996, no First
Michigan Company has:

                                     - 14 -


<PAGE>   21



                  (a) merged with any other corporation or bank, or permitted
any other corporation or bank to merge into or consolidate with it; acquired
control over any other firm, bank, corporation, or organization;

                  (b) incurred any indebtedness, obligations, or liabilities,
whether absolute, accrued, contingent, or otherwise, including, without
limitation, liabilities as guarantor under any guaranty, other than
indebtedness, obligations, and liabilities incurred in the ordinary course of
its business or incurred under the contracts and commitments referred to in
Section 2.15 hereof;

                  (c) forgiven or cancelled any indebtedness or contractual 
obligation, other than in the ordinary course of business;

                  (d) purchased, sold, transferred, liquidated, or otherwise
acquired or disposed of any material Assets or properties, or entered into any
contract for any such purchase, sale, transfer, liquidation, acquisition, or
disposition, other than in the ordinary course of business;

                  (e) entered into any material lease of real or personal 
property other than in the ordinary course of business;

                  (f) declared, paid, made, or set apart any sum or property
for, any dividend or other distribution, or otherwise paid or transferred any
funds or property to its shareholders, other than the First Michigan 1997 Stock
Dividend, a cash dividend in the amount of $0.18 per share, paid on January 31,
1997, to holders of First Michigan Common of record on December 31, 1996, and a
cash dividend in the amount of $0.18 per share, paid on April 30, 1997, to
holders of First Michigan Common of record on March 31, 1997;

                  (g) made any loans or loan commitments, other than in the
ordinary course of business, to any Affiliate of First Michigan (or any person
or business entity controlled by or affiliated with such an Affiliate);

                  (h) entered into any transaction involving the expenditure of
more than $200,000, other than in the ordinary course of business, except
pursuant to and in accordance with the terms of the contracts and commitments
referred to in Section 2.15 hereof;

                  (i) adopted any change in any accounting policy or method,
except as appropriate to conform to changes in Tax Laws or regulatory accounting
requirements or GAAP; or

                  (j) revalued any asset or adjusted any reserve other than in 
the ordinary course of business.

         2.8      TAX MATTERS.    Except as may be disclosed in Section 2.8 of
the Disclosure Memorandum:

                                     - 15 -


<PAGE>   22



                  (a) All Tax returns required to be filed by or on behalf of
any of the First Michigan Company have been timely filed or requests for
extensions have been timely filed, granted, and have not expired for periods
ended on or before December 31, 1996, and on or before the date of the most
recent fiscal year end immediately preceding the Effective Time and all returns
filed are complete and accurate, except for failures, if any, which, taken
together, would not have a Material Adverse Effect on First Michigan. All Taxes
shown on filed returns have been paid or adequate provision therefor has been
made in the First Michigan Financial Statements. As of the date of this
Agreement, there is no audit examination, deficiency, or refund Litigation with
respect to any Taxes that is reasonably likely to result in a determination that
would have, individually or in the aggregate, a Material Adverse Effect on First
Michigan, except as reserved against in the First Michigan Financial Statements
delivered prior to the date of this Agreement or as disclosed in Section 2.8 of
the Disclosure Memorandum. All Taxes and other Liabilities due with respect to
completed and settled Tax examinations or concluded Tax Litigation have been
paid or adequate provision therefor has been made in the First Michigan
Financial Statements.

                  (b) None of the First Michigan Companies has executed an
extension or waiver of any statute of limitations on the assessment or
collection of any Tax due (excluding such statutes that relate to years
currently under examination by the Internal Revenue Service or other applicable
taxing authorities) that is currently in effect.

                  (c) Adequate provision for any Taxes due or to become due for
any of the First Michigan Companies for the period or periods through and
including the date of the respective First Michigan Financial Statements has
been made and is reflected on such First Michigan Financial Statements in
accordance with GAAP.

                  (d) Deferred Taxes of the First Michigan Companies have been 
provided for in accordance with GAAP.

                  (e) Each of the First Michigan Companies is in material
compliance with, and its records contain all information and documents
(including properly completed IRS Forms W-9) necessary to comply with, all
applicable information reporting and Tax withholding requirements under federal,
state, and local Tax Laws, and such records identify with specificity all
accounts subject to backup withholding under Section 3406 of the Internal
Revenue Code.

                  (f) Except as disclosed in Section 2.8 of the Disclosure
Memorandum, First Michigan has not received any notification of an audit of its
federal income tax returns for any tax years since 1988.

         2.9      [RESERVED]

         2.10     ASSETS AND INSURANCE.
                  --------------------
                  (a)      Except as disclosed in Section 2.10 of the Disclosure
Memorandum or as disclosed or reserved against in the First Michigan Financial
Statements delivered prior to the date

                                     - 16 -


<PAGE>   23



of this Agreement, First Michigan has good and marketable title, free and clear
of all Liens, to all of its Assets which are material to the operation of its
business. All Assets which are material to First Michigan's business and that
are held under leases or subleases by First Michigan, are held under valid
Contracts enforceable in accordance with their respective terms (except as
enforceability may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium, or other Laws affecting the enforcement of
creditors' rights generally and except that the availability of the equitable
remedy of specific performance or injunctive relief is subject to the discretion
of the court before which any proceedings may be brought), and each such
Contract is in full force and effect.

                  (b) To its Knowledge, First Michigan currently maintains
insurance and blanket bonds (collectively, "Insurance") similar in amounts,
scope, and coverage to that customarily maintained by other bank organizations
comparable in size and operation to First Michigan. First Michigan has not
received notice from any Insurance carrier that (i) such Insurance will be
canceled or that coverage thereunder will be reduced or eliminated, or (ii)
premium costs with respect to such policies of insurance will be substantially
increased. Except as set forth in Section 2.16 of the Disclosure Memorandum,
there are presently no material claims pending under such policies of Insurance
and no notices have been given by First Michigan under such policies with
respect to any material potential or actual claims and First Michigan has no
Knowledge of any events that require any such notice to be given. All premiums
due under the policies of Insurance have been paid and First Michigan has not
failed to give any notice or to present a material claim in due and timely
fashion under any such policy of Insurance.

                  (c) Section 2.10 of the Disclosure Memorandum sets forth a
list of the addresses all Operational Real Property. To the Knowledge of First
Michigan, the Operational Real Property and the use of such Operational Real
Property by First Michigan does not violate zoning, land use laws, governmental
regulations or restrictive covenants, except where such violation would not have
a Material Adverse Effect on First Michigan. To the Knowledge of First Michigan,
(i) the Operational Real Property and the use thereof by First Michigan do not
encroach upon any property owned by any other person, and (ii) no property owned
by any other person encroaches upon any of the Operational Real Property, except
where such encroachment would not have a Material Adverse Effect on First
Michigan.

         2.11     Environmental Matters.  Except as disclosed in Section 2.11 of
the Disclosure Memorandum:

                  (a) To the Knowledge of First Michigan, each First Michigan
Company's Participation Facilities, and its Loan Properties are, and have been,
in compliance with all Environmental Laws, except for violations which are not
reasonably likely to have, individually or in the aggregate, a Material Adverse
Effect on First Michigan.

                  (b) There is no Litigation pending or, to the Knowledge of
First Michigan, threatened before any court, governmental agency, or authority
or other forum in which any First Michigan Company or any of its Participation
Facilities has been or, with respect to threatened Litigation, may be named as a
defendant (i) for alleged noncompliance (including by any predecessor) with any
Environmental Law or (ii) relating to the release into the environment of any

                                     - 17 -


<PAGE>   24



Hazardous Substance, whether or not occurring at, on, under, or involving a site
owned, leased, or operated by any First Michigan Company or any of its
Participation Facilities, except for such Litigation, pending or threatened,
that, if a judgment adverse to a First Michigan Company were to be rendered in
such Litigation, would not have, individually or in the aggregate, a Material
Adverse Effect on First Michigan.

                  (c) There is no Litigation pending or, to the Knowledge of
First Michigan, threatened before any court, governmental agency, or board or
other forum in which any First Michigan Company or any of its Loan Properties
has been or, with respect to threatened Litigation, may be named as a defendant
or potentially responsible party (i) for alleged noncompliance (including by any
predecessor) with any Environmental Law or (ii) relating to the release into the
environment of any Hazardous Substance, whether or not occurring at, on, under,
or involving a Loan Property, except for such Litigation, pending or threatened,
that, if a judgment adverse to a First Michigan Company were to be rendered in
such Litigation, would not have, individually or in the aggregate, a Material
Adverse Effect on First Michigan.

                  (d) To the Knowledge of First Michigan, there is no reasonable
basis for any Litigation of a type described in subsections (b) or (c) above,
except such as is not reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on First Michigan.

                  (e) During the period of (i) any First Michigan Company's
ownership or operation of any of their respective current properties, (ii) any
First Michigan Company's participation in the management of any Participation
Facility, or (iii) to the Knowledge of First Michigan, any First Michigan
Company's holding of a security interest in a Loan Property, there have been no
releases of Hazardous Substance in, on, under, or affecting such properties,
except such as are not reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on First Michigan. Prior to the period of
(i) any First Michigan Company's ownership or operation of any of their
respective current properties, (ii) any First Michigan Company's participation
in the management of any Participation Facility, or (iii) any First Michigan
Company's holding of a security interest in a Loan Property, to the Knowledge of
First Michigan, there were no releases of Hazardous Substance in, on, under, or
affecting any such property, Participation Facility or Loan Property, except
such as are not reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on First Michigan.1

                  (f) (i) No claims have been made or, to the Knowledge of First
Michigan, threatened at any time by any third Person against any First Michigan
Company relating to damage, contribution, cost recovery, compensation, loss, or
injury resulting from any Hazardous Substance; (ii) none of the Real Property
has been used by any First Michigan Company for the storage or disposal of
Hazardous Substances, except in compliance with applicable Law, nor, to the
Knowledge of First Michigan, is any of the Real Property contaminated by any
Hazardous Substance; and (iii) to the Knowledge of First Michigan, none of the
Real Property has in the past contained or presently contains any underground
storage tanks; except to the extent that any of the matters set forth in items
(i), (ii), and (iii) above would not have a Material Adverse Effect on First
Michigan.

                                     - 18 -


<PAGE>   25



         2.12 COMPLIANCE WITH LAWS. Each First Michigan Company has in effect
all Permits necessary for it to own, lease, or operate its material Assets and
to carry on its business as now conducted, except for those Permits, the absence
of which are not reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on First Michigan, and there has occurred no Default
under any such Permit, other than Defaults which are not reasonably likely to
have, individually or in the aggregate, a Material Adverse Effect on First
Michigan. Except as disclosed in Section 2.12 of the Disclosure Memorandum, no
First Michigan Company:

                  (a) is in Default under its Governing Documents;

                  (b) is in violation of any Laws, Orders, or Permits applicable
to its business or employees conducting its business, except for violations
which are not reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on First Michigan;

                  (c) has received any notification or communication from any
agency or department of federal, state, or local government or any Regulatory
Authority or the staff thereof (i) asserting that any such entity is not in
compliance with any of the Laws or Orders which such governmental authority or
Regulatory Authority enforces, where such noncompliance is reasonably likely to
have a Material Adverse Effect on First Michigan, (ii) threatening to revoke any
Permits, the revocation of which is reasonably likely to have a Material Adverse
Effect on First Michigan, or (iii) requiring any such entity to enter into or
consent to the issuance of a cease and desist order, supervisory letter, formal
agreement, directive, commitment, or memorandum of understanding, or to adopt
any resolution of the Board of Directors of such entity or similar undertaking,
which restricts materially the conduct of its business, or in any manner relates
to its capital adequacy, its credit or reserve policies, its management, or the
payment of dividends, and is subject to any such agreement under, letter of
understanding; or

                  (d) directly or indirectly engages in any material activity
prohibited to be conducted by such entity, or owns any material Assets
prohibited to be held by such entity.

         2.13 LABOR RELATIONS. Except as set forth in Section 2.13 of the
Disclosure Memorandum, no First Michigan Company is the subject of any
Litigation asserting that it has committed an unfair labor practice (within the
meaning of the National Labor Relations Act or comparable state law) or seeking
to compel it to bargain with any labor organization as to wages or conditions of
employment, nor is there any strike or other labor dispute involving any First
Michigan Company, pending or, to the Knowledge of First Michigan, threatened,
or, to the Knowledge of First Michigan, is there any activity involving any
First Michigan Company's employees seeking to certify a collective bargaining
unit or engaging in any other organization activity.

         2.14     EMPLOYEE BENEFIT PLANS.
                  ----------------------
                  (a) First Michigan has disclosed in Section 2.14 of the
Disclosure Memorandum, and has delivered or made available to Huntington prior
to the execution of this Agreement copies in each case of, all First Michigan
Benefit Plans.

                                     - 19 -


<PAGE>   26



                  (b) No First Michigan Pension Plan is or has been a
"multiemployer plan" within the meaning of Section 3(37) of ERISA.

                  (c) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, all First Michigan Benefit Plans are in compliance with the
applicable terms of ERISA, the Internal Revenue Code, including the 1986
amendments thereto, and any other applicable Laws, the breach or violation of
which are reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on First Michigan.

                  (d) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, each First Michigan ERISA Plan which is intended to be qualified
under Section 401(a) of the Internal Revenue Code has received a favorable
determination letter which takes into account the Tax Reform Act of 1986 and
subsequent legislation for which a determination letter is available from the
Internal Revenue Service, and First Michigan is not aware of any circumstances
likely to result in revocation of any such favorable determination letter. To
the Knowledge of First Michigan, no First Michigan Company has engaged in a
transaction with respect to any First Michigan Benefit Plan that, assuming the
taxable period of such transaction expired as of the date hereof, would subject
any First Michigan Company to a Tax imposed by either Section 4975 of the
Internal Revenue Code or Section 502(i) of ERISA in amounts which are reasonably
likely to have, individually or in the aggregate, a Material Adverse Effect on
First Michigan.

                  (e) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, no First Michigan Pension Plan has any "unfunded current liability,"
as that term is defined in Section 302(d)(8)(A) of ERISA, and the fair market
value of the assets of any such plan exceeds the plan's "benefit liabilities,"
as that term is defined in Section 4001(a)(16) of ERISA, when determined under
actuarial factors that would apply if the plan terminated in accordance with all
applicable legal requirements and assuming the adoption of interest rates and
mortality tables described in Section 417(e)(3)(A)(i) and the use of such
interest rates published in January 1997, and assuming that all participants
take a lump sum distribution of their vested accrued benefits on January 1,
1997.

                  (f) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, since the date of the most recent actuarial valuation, there has
been (i) no material change in the financial position of any First Michigan
Pension Plan, (ii) no change in the actuarial assumptions with respect to any
First Michigan Pension Plan, and (iii) no increase in benefits under any First
Michigan Pension Plan as a result of plan amendments or changes in applicable
Law which is reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on any First Michigan Company or materially adversely
affect the funding status of any such plan.

                  (g) Except as disclosed in Section 2.14 of the Disclosure 
Memorandum, neither any First Michigan Pension Plan nor any "single-employer
plan," within the meaning of Section 4001(a)(15) of ERISA, currently or formerly
maintained by any First Michigan Company, or the single-employer plan of any
entity which is considered one employer with First Michigan under Section 4001
of ERISA or Section 414 of the Internal Revenue Code or Section 302 of ERISA
(whether or not waived) (an "ERISA Affiliate") has an "accumulated funding
deficiency" within the meaning of Section 412 of the Internal Revenue Code or
Section 302 of ERISA. No First Michigan

                                     - 20 -


<PAGE>   27



Company has provided, or is required to provide, security to a First Michigan
Pension Plan or to any single-employer plan of an ERISA Affiliate pursuant to
Section 401(a)(29) of the Code.

                  (h) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, within the six-year period preceding the Effective Time, no
Liability under Subtitle C or D of Title IV of ERISA has been or is expected to
be incurred by any First Michigan Company with respect to any ongoing, frozen,
or terminated single-employer plan or the single-employer plan of any ERISA
Affiliate, which Liability is reasonably likely to have a Material Adverse
Effect on First Michigan. No First Michigan Company has incurred any withdrawal
Liability with respect to a multi-employer plan under Subtitle B of Title IV of
ERISA (regardless of whether based on contributions of an ERISA Affiliate),
which Liability is reasonably likely to have a Material Adverse Effect on First
Michigan. No notice of a "reportable event," within the meaning of Section 4043
of ERISA for which the 30-day reporting requirement has not been waived, has
been required to be filed for any First Michigan Pension Plan or by any ERISA
Affiliate within the 12-month period ending on the date hereof.

                  (i) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, no First Michigan Company has any Liability for retiree health and
life benefits under any of the First Michigan Benefit Plans and there are no
restrictions on the rights of such First Michigan to amend or terminate any such
Plan without incurring any Liability thereunder, which Liability is reasonably
likely to have a Material Adverse Effect on First Michigan.

                  (j) Except as disclosed in Section 2.14 of the Disclosure
Memorandum, neither the execution and delivery of this Agreement nor the
consummation of the transactions contemplated by the Merger Documents, will (i)
result in any payment (including severance, unemployment compensation, golden
parachute, or otherwise) becoming due to any director or any employee of any
First Michigan Company from any First Michigan Company under any First Michigan
Benefit Plan or otherwise, (ii) increase any benefits otherwise payable under
any First Michigan Benefit Plan, or (iii) result in any acceleration of the time
of payment or vesting of any such benefit.

                  (k) All liabilities under any First Michigan Benefit Plan,
other than benefits accrued pursuant to funded retirement plans subject to the
provisions of Section 412 of the Internal Revenue Code or Section 302 of ERISA,
have been fully reflected on the audited First Michigan Financial Statements to
the extent required by and in accordance with GAAP.

         2.15     MATERIAL CONTRACTS.
                                        
                  (a) The Disclosure Memorandum contains a complete and correct
list of all material Contracts to which any First Michigan Company is a party,
by which any First Michigan Company or any of its property is bound, or which
has been authorized by any such First Michigan Company, of the following types
(collectively, the "First Michigan Contracts"):

                           (i) promissory notes, guaranties, mortgages, security
         agreements, or other evidences of indebtedness of First Michigan, other
         than (A) Contracts evidencing deposit liabilities, purchases of federal
         funds, secured repurchase agreements, Federal Reserve Bank

                                     - 21 -


<PAGE>   28



         advances, Federal Home Loan Bank advances, trade payables incurred in
         the ordinary course of business, (B) Contracts relating to borrowings
         or guarantees made in the ordinary course of business, or (D) Contracts
         that are terminable without penalty on 60 or fewer days' notice or that
         involve less than $200,000 in the aggregate;

                           (ii) employment, bonus, compensation, severance, or
         consulting agreements, other than any such Contracts that are
         terminable without penalty on 60 or fewer days' notice or that involve
         less than $200,000 in the aggregate;

                           (iii) any Rights plan of First Michigan, including
         any stock option plan, stock appreciation rights plan, restricted stock
         option plan or stock purchase plan;

                           (iv)  collective bargaining agreements or other 
         agreement with or to a labor union or guild;

                           (v) any contract, arrangement, commitment or
         understanding which is a "material contract" as such term is defined in
         Item 601(b)(10) of the Regulation S-K of the Securities and Exchange
         Commission; and

                           (vi) any contract, arrangement, commitment, or
         understanding which would prohibit or materially delay the consummation
         of the Merger or any of the transactions contemplated by the Merger
         Documents.

With respect to each First Michigan Contract and except as disclosed in Section
2.15 of the Disclosure Memorandum: (i) the Contract is in full force and effect;
(ii) First Michigan is not in Default thereunder, other than Defaults which are
not reasonably likely to have, individually or in the aggregate, a Material
Adverse Effect on First Michigan; (iii) First Michigan has not repudiated or
waived any material provision of any such Contract; and (iv) no other party to
any such Contract is, to the knowledge of First Michigan, in Default in any
respect, other than Defaults which are not reasonable likely to have,
individually or in the aggregate, a Material Adverse Effect on First Michigan,
or has repudiated or waived any material provision thereunder.

         2.16 LEGAL PROCEEDINGS. Except as disclosed in Section 2.16 of the
Disclosure Memorandum, there is no Litigation instituted or pending or, to the
Knowledge of First Michigan, threatened (or unasserted but considered probable
of assertion and which, if asserted, would have at least a reasonable
probability of an unfavorable outcome) against any First Michigan Company, or
against any Asset, interest, or right of any of them, that seeks to enjoin,
delay, or prevent the execution, delivery, or performance of the Merger
Documents or the completion of the transactions contemplated therein or herein,
or that, if a judgment adverse to a First Michigan Company were to be rendered
in such Litigation, would have, individually or in the aggregate, a Material
Adverse Effect on First Michigan, nor are there any Orders of any Regulatory
Authorities, other governmental authorities, or arbitrators outstanding against
any First Michigan Company that would have, individually, or in the aggregate, a
Material Adverse Effect on First Michigan. Section 2.16 of the Disclosure
Memorandum contains a copy of each audit letter response received by First
Michigan from attorneys for any First Michigan Company in connection with the
preparation of the

                                     - 22 -


<PAGE>   29



Financial Statements of First Michigan or otherwise since December 31, 1996,
relating to any Litigation pending as of the date of this Agreement to which any
First Michigan Company is a party and which names any First Michigan Company as
a defendant or cross-defendant, and a brief summary report of any such
Litigation that is not discussed in such audit letter responses.

         2.17 REPORTS. Since January 1, 1991, or the date of organization if
later, each First Michigan Company has timely filed all material reports and
statements, together with any amendments required to be made with respect
thereto, that it was required to file with any applicable federal or state
securities or bank authorities, except failures to file which are not reasonably
likely to have, individually or in the aggregate, a Material Adverse Effect on
First Michigan. As of their respective dates, each of such reports and
documents, including the financial statements, exhibits, and schedules thereto,
complied in all material respects with all applicable Laws. As of its respective
date, each such report and document did not, in all material respects, contain
any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements made therein,
in light of the circumstances under which they were made, not misleading.

         2.18 STATEMENTS TRUE AND CORRECT. None of the information supplied or
to be supplied by any First Michigan Company or any Affiliate thereof for
inclusion in the Registration Statement to be filed by Huntington with the SEC
will, when the Registration Statement becomes effective, be false or misleading
with respect to any material fact, or omit to state any material fact necessary
to make the statements therein not misleading. None of the information supplied
or to be supplied by any First Michigan Company or any Affiliate thereof for
inclusion in the Proxy Statement to be mailed to First Michigan's shareholders
in connection with the First Michigan Shareholders' Meeting or the Proxy
Statement to be mailed to Huntington's shareholders in connection with the
Huntington Shareholders' Meeting, and any other documents to be filed by a First
Michigan or any Affiliate thereof with the SEC or any other Regulatory Authority
in connection with the transactions contemplated by the Merger Documents, will,
at the respective time such documents are filed, and with respect to the Proxy
Statements, when first mailed to the respective shareholders of First Michigan
and Huntington, be false or misleading with respect to any material fact, or
omit to state any material fact necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading, or, in
the case of the Proxy Statements or any amendment thereof or supplement thereto,
at the time of the First Michigan or Huntington Shareholders' Meeting, as
applicable, be false or misleading with respect to any material fact, or omit to
state any material fact necessary to correct any statement in any earlier
communication with respect to the solicitation of any proxy for the First
Michigan or Huntington Shareholders' Meeting. All documents that any First
Michigan Company or any Affiliate thereof is responsible for filing with any
Regulatory Authority in connection with the transactions contemplated by the
Merger Documents will comply as to form in all material respects with the
provisions of applicable Law.

         2.19 TAX, REGULATORY, AND POOLING MATTERS. No First Michigan Company
nor, to the Knowledge of First Michigan, any Affiliate thereof, has taken any
action or has any Knowledge of any fact or circumstance that is reasonably
likely to (i) prevent the transactions contemplated by the Merger Documents,
including the Merger, from qualifying as a reorganization within the meaning of
Section 368(a) of the Internal Revenue Code, (ii) materially impede or delay
receipt of any

                                     - 23 -


<PAGE>   30



Consents of Regulatory Authorities referred to in Section 7.1(b) of this
Agreement or result in the imposition of a condition or restriction of the type
referred to in the last sentence of such Section, or (iii) prevent Huntington
from accounting for the Merger as a pooling of interests in accordance with GAAP
and applicable SEC regulations.

         2.20 STATE TAKEOVER LAWS. Each First Michigan Company has taken all 
necessary steps to exempt the transactions contemplated by the Merger Documents
from any applicable state takeover Law.

         2.21 CHARTER PROVISIONS. First Michigan has taken all action so that
the entering into of the Merger Documents and the consummation of the Merger and
the other transactions contemplated by the Merger Documents do not and will not
result in the grant of any rights to any Person under the Governing Documents of
any First Michigan Company or restrict or impair the ability of Huntington or
any of its Subsidiaries to vote, or otherwise to exercise the rights of a
shareholder with respect to, shares of First Michigan that may be directly or
indirectly acquired or controlled by Huntington or any of its Subsidiaries.

         2.22 COMPLIANCE WITH CERTAIN LAWS. Except as disclosed in Section 2.22
of the Disclosure Memorandum, First Michigan is in compliance with all currently
applicable capital requirements and guidelines prescribed by all appropriate
federal or state Regulatory Authorities.

         2.23 COMMUNITY REINVESTMENT ACT COMPLIANCE. No First Michigan Company
has received any notice of non-compliance with the applicable provisions of the
CRA and the regulations promulgated thereunder, and First Michigan has received
a CRA rating of satisfactory or better from the FDIC. First Michigan knows of no
fact or circumstance or set of facts or circumstances which would cause First
Michigan to fail to comply with such provisions or to cause the CRA rating of
First Michigan to fall below satisfactory.

                                    ARTICLE 3
                  REPRESENTATIONS AND WARRANTIES OF HUNTINGTON
                  --------------------------------------------

         Huntington hereby represents and warrants to First Michigan as follows:

         3.1 ORGANIZATION, STANDING, AND POWER. Huntington is duly registered as
a bank holding company under the BHC Act. Huntington is a corporation duly
organized, validly existing, and in good standing under the Laws of the State of
Maryland, and has the corporate power and authority to carry on its business as
now conducted and to own, lease and operate its material Assets. Huntington is
duly qualified or licensed to transact business as a foreign corporation in good
standing in the States of the United States and foreign jurisdictions where the
character of its Assets or the nature or conduct of its business requires it to
be so qualified or licensed, except for such jurisdictions in which the failure
to be so qualified or licensed is not reasonably likely to have, individually or
in the aggregate, a Material Adverse Effect on Huntington.

                                     - 24 -


<PAGE>   31



         3.2      AUTHORITY; NO BREACH BY AGREEMENT.
                                                    
                  (a) Huntington has the corporate power and authority necessary
to execute, deliver and perform its obligations under the Merger Documents and
to consummate the transactions contemplated thereby. The execution, delivery and
performance of the Merger Documents and the consummation of the transactions
contemplated herein and therein, including the Merger, have been duly and
validly authorized by all necessary corporate action in respect thereof on the
part of Huntington, subject to the approval of this Agreement by a two-thirds
majority of the outstanding shares of Huntington Common which is the only
shareholder vote required for approval of the Merger Documents and the
consummation of the Merger by Huntington. Subject to the requisite shareholder
approval, the Merger Documents represent the legal, valid, and binding
obligations of Huntington, enforceable against Huntington in accordance with
their respective terms (except in all cases as such enforceability may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium, or
similar Laws affecting the enforcement of creditors' rights generally and except
that the availability of the equitable remedy of specific performance or
injunctive relief is subject to the discretion of the court before which any
proceeding may be brought).

                  (b) Neither the execution and delivery of the Merger Documents
by Huntington, nor the consummation by Huntington of the transactions
contemplated thereby, nor compliance by Huntington with any of the provisions
thereof or hereof, will (i) conflict with or result in a breach of any provision
of Huntington's Governing Documents, or (ii) constitute or result in a Default
under, or require any Consent pursuant to, or result in the creation of any Lien
on any Asset of any Huntington Company under, any Contract or Permit of any
Huntington Company, where such Default or Lien, or any failure to obtain such
Consent, is reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on Huntington, or, (iii) subject to receipt of the
requisite approvals referred to in Section 7.1(a) and (b) of this Agreement,
violate any Law or Order applicable to any Huntington Company or any of their
respective material Assets.

                  (c) Other than in connection or compliance with the provisions
of the Securities Laws, applicable state corporate and Securities Laws, and
rules of the NASD, and other than Consents required from Regulatory Authorities,
and other than notices to or filings with the Internal Revenue Service or the
Pension Benefit Guaranty Corporation with respect to any employee benefit plans,
and other than Consents, filings, or notifications which, if not obtained or
made, are not reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on Huntington, no notice to, filing with, or Consent of,
any public body or authority is necessary for the consummation by Huntington of
the Merger and the other transactions contemplated in the Merger Documents.

         3.3      CAPITAL STOCK.
                                
                  (a) The authorized capital stock of Huntington consists of (i)
300,000,000 shares of Huntington Common, of which 144,739,081 shares were issued
and outstanding as of April 22, 1997, and (ii) 6,617,808 shares of Huntington
Preferred Stock, none of which are designated, issued or outstanding. All of the
issued and outstanding shares of Huntington Common are, and all of the shares of
Huntington Common to be issued in exchange for shares of First Michigan Common
upon

                                     - 25 -


<PAGE>   32



consummation of the Merger, when issued in accordance with the terms of this
Agreement, will be, duly and validly issued and outstanding and fully paid and
nonassessable. None of the outstanding shares of Huntington Capital Stock has
been, and none of the shares of Huntington Common to be issued in exchange for
shares of First Michigan Common upon consummation of the Merger will be, issued
in violation of any preemptive rights of the current or past shareholders of
Huntington.

                  (b) There are no Rights relating to the outstanding shares of
Huntington Common other than those provided under the Huntington Rights
Agreement and each outstanding share of Huntington Common, including those to be
issued to the shareholders of First Michigan in the Merger will have the Rights
provided under the Huntington Rights Agreement. The execution and delivery of
the Merger Documents does not, and the consummation of the Merger and the other
transactions contemplated by the Merger Documents will not, (i) result in the
grant of any Rights to any Person under the Huntington Rights Agreement, (ii)
result in separation from the shares of Huntington Common of the Rights granted
under the Huntington Rights Agreement, (iii) permit any holder of any of the
Rights under the Huntington Rights Agreement to exercise any such Rights, or
(iv) give any Person any Right to purchase any securities issued by Huntington
(other than to First Michigan's shareholders as contemplated in the Merger
Agreement).

                  (c) Huntington has taken all corporate action necessary to
reserve for issuance a sufficient number of shares of Huntington Common for
delivery upon the exercise of the First Michigan Stock Options to be converted
in accordance with the terms of the Merger Agreement, and the shares of
Huntington Common issuable upon the exercise of the First Michigan Stock Options
so converted shall be included under an existing effective registration
statement with respect to such shares of Huntington Common

         3.4 HUNTINGTON SUBSIDIARIES. Huntington or one of its Subsidiaries owns
all of the issued and outstanding shares of capital stock of each Huntington
Subsidiary. No equity securities of any Huntington Subsidiary are or may become
required to be issued by reason of any Rights, and there are no Contracts by
which any Huntington Subsidiary is bound to issue additional shares of its
capital stock or Rights. There are no Contracts relating to the rights of any
Huntington Company to vote or to dispose of any shares of the capital stock of
any Huntington Subsidiary. All of the shares of capital stock of each Huntington
Subsidiary held by a Huntington Company are fully paid and, except pursuant to
12 U.S.C. Section 55 in the case of national banks and comparable provisions of
applicable state Laws, if any, in the case of any state-chartered depository
institutions, are owned by a Huntington Company free and clear of any Lien. Each
Huntington Subsidiary is a corporation, national bank, state-chartered bank, or
other federal or state depository institution and is duly organized, validly
existing, and (as to corporations) in good standing under the Laws of the
jurisdiction in which it is incorporated or organized, and has the corporate
power and authority necessary for it to own, lease, and operate its Assets and
to carry on its business as now conducted. Each Huntington Subsidiary is duly
qualified or licensed to transact business as a foreign corporation in good
standing in the States of the United States and foreign jurisdictions where the
character of its Assets or the nature or conduct of its business requires it to
be so qualified or licensed, except for such jurisdictions in which the failure
to be so qualified or licensed is not reasonably likely to have, individually or
in the aggregate, a Material Adverse Effect on Huntington. Each of the
Huntington Subsidiaries that is a depository institution is an "insured
institution," as defined in the Federal

                                     - 26 -


<PAGE>   33



Deposit Insurance Act and applicable regulations thereunder, and the deposits in
which are insured by the Bank Insurance Fund.

         3.5 FINANCIAL STATEMENTS. Huntington has delivered to First Michigan
all Huntington Financial Statements and will deliver to First Michigan copies of
all Huntington Financial Statements prepared subsequent to the date hereof. The
Huntington Financial Statements (as of the dates thereof and for the periods
covered thereby) (i) are in accordance with the books and records of the
Huntington Companies, which are or will be, as the case may be, complete and
correct and which have been or will have been, as the case may be, maintained in
accordance with good business practices, and (ii) present or will present, as
the case may be, fairly the consolidated financial position of the Huntington
Companies as of the dates indicated and the consolidated results of operations,
changes in shareholders' equity, and cash flows of the Huntington Companies for
the periods indicated, in accordance with GAAP (subject to exceptions as to
consistency specified therein or as may be indicated in the notes thereto or, in
the case of interim financial statements, to normal recurring year-end
adjustments that are not material in amount or effect).

         3.6 ABSENCE OF UNDISCLOSED LIABILITIES. No Huntington Company has any
Liabilities that are reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on Huntington, except Liabilities which are
accrued or reserved against in the consolidated balance sheets of Huntington as
of December 31, 1996, included in the Huntington Financial Statements delivered
prior to the date of this Agreement or reflected in the notes thereto.

         3.7 ABSENCE OF CERTAIN CHANGES OR EVENTS. Except as disclosed in the
Huntington Financial Statements delivered prior to the date of this Agreement,
since December 31, 1996, (i) there have been no events, changes or occurrences
which have had, or are reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on Huntington, and (ii) Huntington has not
taken any action, or failed to take any action, prior to the date of this
Agreement, which action or failure, if taken or occurring after the date of this
Agreement, would represent or result in a material breach or violation of any of
the covenants or agreements of Huntington provided in this Agreement.

         3.8      TAX MATTERS.
                             
                  (a) All Tax returns required to be filed by or on behalf of
any of the Huntington Company have been timely filed or requests for extensions
have been timely filed, granted, and have not expired for periods ended on or
before December 31, 1996, and on or before the date of the most recent fiscal
year end immediately preceding the Effective Time and all returns filed are
complete and accurate, except for failures, if any, which, taken together, would
not have a Material Adverse Effect on Huntington. All Taxes shown on filed
returns have been paid or adequate provision therefor has been made in the
Huntington Financial Statements. As of the date of this Agreement, there is no
audit examination, deficiency, or refund Litigation with respect to any Taxes
that is reasonably likely to result in a determination that would have,
individually or in the aggregate, a Material Adverse Effect on Huntington,
except as reserved against in the Huntington Financial Statements. All Taxes and
other Liabilities due with respect to completed and settled Tax

                                     - 27 -


<PAGE>   34



examinations or concluded Tax Litigation have been paid or adequate provision
therefor has been made in the Huntington Financial Statements.

                  (b) None of the Huntington Companies has executed an extension
or waiver of any statute of limitations on the assessment or collection of any
Tax due (excluding such statutes that relate to years currently under
examination by the Internal Revenue Service or other applicable taxing
authorities) that is currently in effect.

                  (c) Adequate provision for any Taxes due or to become due for
any of the Huntington Companies for the period or periods through and including
the date of the respective Huntington Financial Statements has been made and is
reflected on such Huntington Financial Statements.

                  (d) Deferred Taxes of the Huntington Companies have been 
provided for in accordance with GAAP.

                  (e) Each of the Huntington Companies is in material compliance
with, and its records contain all information and documents (including properly
completed IRS Forms W-9) necessary to comply with, all applicable information
reporting and Tax withholding requirements under federal, state, and local Tax
Laws, and such records identify with specificity all accounts subject to backup
withholding under Section 3406 of the Internal Revenue Code.

         3.9 ASSETS AND INSURANCE. Except to the extent that an exception to any
of the matters described below would not be reasonably likely to have a Material
Adverse Effect on Huntington:

                  (a) Except as disclosed or reserved against in the Huntington
Financial Statements, Huntington has good and marketable title, free and clear
of all Liens, to all of its Assets which are material to the operation of its
business. All Assets which are material to Huntington's business and that are
held under leases or subleases by Huntington, are held under valid Contracts
enforceable in accordance with their respective terms (except as enforceability
may be limited by applicable bankruptcy, insolvency, reorganization, moratorium,
or other Laws affecting the enforcement of creditors' rights generally and
except that the availability of the equitable remedy of specific performance or
injunctive relief is subject to the discretion of the court before which any
proceedings may be brought), and each such Contract is in full force and effect.

                  (b) To its Knowledge, Huntington currently maintains insurance
and blanket bonds (collectively, "Insurance") similar in amounts, scope, and
coverage to that customarily maintained by other bank organizations comparable
in size and operation to Huntington. Huntington has not received notice from any
Insurance carrier that (i) such Insurance will be canceled or that coverage
thereunder will be reduced or eliminated, or (ii) premium costs with respect to
such policies of insurance will be substantially increased. All premiums due
under the policies of Insurance have been paid.

         3.10     COMPLIANCE WITH LAWS.  Each Huntington Company has in effect 
all Permits necessary for it to own, lease or operate its material Assets and to
carry on its business as now

                                     - 28 -


<PAGE>   35



conducted, except for those Permits the absence of which are not reasonably
likely to have, individually or in the aggregate, a Material Adverse Effect on
Huntington, and there has occurred no Default under any such Permit, other than
Defaults which are not reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on Huntington. No Huntington Company:

                  (a) is in Default under its Governing Documents;

                  (b) is in violation of, or in Default under, any Laws, Order
or Permits applicable to its business or employees conducting its business,
except for violations which are not reasonably likely to have, individually or
in the aggregate, a Material Adverse Effect on Huntington;

                  (c) has received any notification or communication from any
agency or department of federal, state, or local government or any Regulatory
Authority or the staff thereof (i) asserting that any Huntington Company is not
in compliance with any of the Laws or Orders, including CRA, which such
governmental authority or Regulatory Authority enforces, where such
noncompliance is reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on Huntington or which would prevent or delay the
consummation of the transactions contemplated under the Merger Documents, (ii)
threatening to revoke any Permits, the revocation of which is reasonably likely
to have, individually or in the aggregate, a Material Adverse Effect on
Huntington, (iii) requiring any Huntington Company to enter into or consent to
the issuance of a cease and desist order, formal agreement, directive,
commitment or memorandum of understanding, or to adopt any resolution of the
Board of Directors of such entity, or similar undertaking, which restricts
materially the conduct of its business, or in the payment of dividends, or which
are reasonably likely to delay or prevent the consummation of the transactions
contemplated herein; or

                  (d) directly or indirectly engages in any material activity
prohibited to be conducted by such entity, or owns any material Assets
prohibited to be held by such entity.

         3.11     EMPLOYEE BENEFIT PLANS.
                                        
                  (a) Huntington has delivered or made available to First
Michigan prior to the execution of this Agreement copies of all Huntington
Benefit Plans currently adopted, maintained by, sponsored in whole or in part
by, or contributed to by any Huntington Company.

                  (b) No Huntington Pension Plan is or has been a "multiemployer
plan" within the meaning of Section 3(37) of ERISA.

                  (c) All Huntington Benefit Plans are in compliance with the
applicable terms of ERISA, the Internal Revenue Code including the 1986
amendments thereto and any other applicable Laws, the breach or violation of
which are reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on Huntington.

                  (d) Each Huntington ERISA Plan which is intended to be
qualified under Section 401(a) of the Internal Revenue Code has received a
favorable determination letter which takes into

                                     - 29 -


<PAGE>   36



account the Tax Reform Act of 1986 and subsequent legislation for which a
determination letter is available from the Internal Revenue Service, and
Huntington is not aware of any circumstances likely to result in revocation of
any such favorable determination letter. To the Knowledge of Huntington, no
Huntington Company has engaged in a transaction with respect to any Huntington
Benefit Plan that, assuming the taxable period of such transaction expired as of
the date hereof, would subject any Huntington Company to a Tax imposed by either
Section 4975 of the Internal Revenue Code or Section 502(i) of ERISA in amounts
which are reasonably likely to have, individually or in the aggregate, a
Material Adverse Effect on Huntington.

                  (e) As of the date of the most recent actuarial valuation, no
Huntington Pension Plan had any "unfunded current liability," as that term is
defined in Section 302(d)(8)(A) of ERISA, and the fair market value of the
assets of any such plan exceeds the plan's "benefit liabilities," as that term
is defined in Section 4001(a)(16) of ERISA, when determined under actuarial
factors that would apply if the plan terminated in accordance with all
applicable legal requirements and assuming the adoption of interest rates and
mortality tables described in Section 417(e)(3)(A)(i) and the use of such
interest rates published in January 1997, and assuming that all participants
take a lump sum distribution of their vested accrued benefits on January 1,
1997.

                  (f) Since the date of the most recent actuarial valuation,
there has been (i) no material change in the financial position of any
Huntington Pension Plan, (ii) no change in the actuarial assumptions with
respect to any Huntington Pension Plan, and (iii) no increase in benefits under
any Huntington Pension Plan as a result of plan amendments or changes in
applicable Law which is reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on any Huntington Company or materially
adversely affect the funding status of any such plan.

                  (g) All liabilities under any Huntington Benefit Plan, other
than benefits accrued pursuant to funded retirement plans subject to the
provisions of Section 412 of the Internal Revenue Code or Section 302 of ERISA,
have been fully reflected on the audited Huntington Financial Statements to the
extent required by and in accordance with GAAP.

         3.12 LEGAL PROCEEDINGS. There is no Litigation instituted or pending
or, to the Knowledge of Huntington, threatened (or unasserted but considered
probable of assertion and which if asserted would have at least a reasonable
probability of an unfavorable outcome) against any Huntington Company, or
against any Asset, interest, or right of any of them, that seeks to enjoin,
delay or prevent the execution, delivery, or performance of the Merger Documents
or the completion of the transactions contemplated therein, or that, if a
judgment adverse to a Huntington Company were to be rendered in such Litigation,
would have, individually or in the aggregate, a Material Adverse Effect on
Huntington, nor are there any Orders of any Regulatory Authorities, other
governmental authorities, or arbitrators outstanding against any Huntington
Company, that would have, individually, or in the aggregate, a Material Adverse
Effect on Huntington.

         3.13 REPORTS. Since January 1, 1992, Huntington has filed all reports
and statements, together with any amendments required to be made with respect
thereto, that it was required to file with (i) the SEC, including, but not
limited to, Forms 10-K, Forms 10-Q, Forms 8-K, and proxy statements, (ii) other
Regulatory Authorities, and (iii) any applicable state securities or bank

                                     - 30 -


<PAGE>   37



authorities (except, in the case of state securities authorities, failures to
file which are not reasonably likely to have, individually or in the aggregate,
a Material Adverse Effect on Huntington). As of their respective dates, each of
such reports and documents, including the financial statements, exhibits, and
schedules thereto, complied in all material respects with all applicable Laws.
As of its respective date, each such report and document did not, contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements made therein, in light of
the circumstances under which they were made, not misleading.

         3.14 STATEMENTS TRUE AND CORRECT. None of the information supplied or
to be supplied by Huntington or any Affiliate thereof for inclusion in the
Registration Statement to be filed by Huntington with the SEC, will, when the
Registration Statement becomes effective, be false or misleading with respect to
any material fact, or omit to state any material fact necessary to make the
statements therein not misleading. None of the information supplied or to be
supplied by Huntington or any Affiliate thereof for inclusion in the Proxy
Statement to be mailed to Huntington's shareholders in connection with the
Huntington Shareholders' Meeting or the Proxy Statement to be mailed to First
Michigan's shareholders in connection with the First Michigan Shareholders'
Meeting, and any other documents to be filed by Huntington or any Affiliate
thereof with the SEC or any other Regulatory Authority in connection with the
transactions contemplated by the Merger Documents, will, at the respective time
such documents are filed, and with respect to the Proxy Statements, when first
mailed to the respective shareholders of Huntington and First Michigan, be false
or misleading with respect to any material fact, or omit to state any material
fact necessary to make the statements therein, in light of the circumstances
under which they were made, not misleading, or, in the case of the Proxy
Statements or any amendment thereof or supplement thereto, at the time of the
Huntington or First Michigan Shareholders' Meeting, as applicable, be false or
misleading with respect to any material fact, or omit to state any material fact
necessary to correct any statement in any earlier communication with respect to
the solicitation of any proxy for the Huntington or First Michigan Shareholders'
Meeting. All documents that Huntington or any Affiliate thereof is responsible
for filing with any Regulatory Authority in connection with the transactions
contemplated by the Merger Documents will comply as to form in all material
respects with the provisions of applicable Law.

         3.15 TAX, REGULATORY, AND POOLING MATTERS. No Huntington Company or any
Affiliate thereof has taken any action or has any Knowledge of any fact or
circumstance that is reasonably likely to (i) prevent the transactions
contemplated by the Merger Documents, including the Merger, from qualifying as a
reorganization within the meaning of Section 368(a) of the Internal Revenue
Code, or (ii) materially impede or delay receipt of any Consents of Regulatory
Authorities referred to in Section 7.1(b) of this Agreement or result in the
imposition of a condition or restriction of the type referred to in the last
sentence of such Section, or (iii) prevent Huntington from accounting for the
Merger as a pooling of interests in accordance with GAAP and applicable SEC
regulation.

         3.16     COMMUNITY REINVESTMENT ACT COMPLIANCE.  No Huntington Company
has received any notice of non-compliance with the applicable provisions of the
CRA and the regulations promulgated thereunder, and Huntington has received a
CRA rating of satisfactory or better from the FDIC. Huntington knows of no fact
or circumstance or set of facts or circumstances which

                                     - 31 -


<PAGE>   38



would cause Huntington to fail to comply with such provisions or to cause the
CRA rating of Huntington to fall below satisfactory.

                                    ARTICLE 4
                         MUTUAL COVENANTS OF THE PARTIES
                         -------------------------------

         4.1 ADVERSE CHANGES IN CONDITION. Each Party agrees to give written
notice promptly to the other Party upon becoming aware of the occurrence or
impending occurrence of any event or circumstance relating to it or any of its
Subsidiaries which (i) is reasonably likely to have, individually or in the
aggregate, a Material Adverse Effect on it or (ii) would cause or constitute a
material breach of any of its representations, warranties, or covenants
contained herein, and to use its reasonable efforts to prevent or promptly to
remedy the same.

         4.2 REPORTS. Each Party and its Subsidiaries shall file all reports
required to be filed by it with Regulatory Authorities between the date of this
Agreement and the Effective Time and shall deliver to the other Party copies of
all such reports promptly after the same are filed. If financial statements are
contained in any such reports filed with the SEC, such financial statements will
fairly present the consolidated financial position of the entity filing such
statements as of the dates indicated and the consolidated results of operations,
changes in shareholders' equity, and cash flows for the periods then ended in
accordance with GAAP (subject in the case of interim financial statements to
normal recurring year-end and audit adjustments that are not material). As of
their respective dates, such reports filed with the SEC will comply in all
material respects with the Securities Laws and will not contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they were made, not misleading. Any financial
statements contained in any other reports to another Regulatory Authority shall
be prepared in accordance with Laws applicable to such reports.

         4.3 REGISTRATION STATEMENT; PROXY STATEMENTS; SHAREHOLDER APPROVAL. As
soon as practicable after execution of this Agreement, Huntington shall file the
Registration Statement with the SEC, and shall use its reasonable efforts to
cause the Registration Statement to become effective under the 1933 Act and take
any action required to be taken under the applicable state Blue Sky or
Securities Laws in connection with the issuance of the shares of Huntington
Common upon consummation of the Merger. First Michigan shall furnish all
information concerning it and the holders of its capital stock as Huntington may
reasonably request in connection with such action. First Michigan and Huntington
shall each call Shareholders' Meetings, to be held as soon as reasonably
practicable after the Registration Statement is declared effective by the SEC,
for the purpose of voting upon approval of the Merger Documents, the Merger, and
such other related matters as it deems appropriate. In connection with the
Shareholders' Meetings, (i) First Michigan and Huntington shall prepare, as part
of the Registration Statement filed with the SEC, Proxy Statements and mail such
Proxy Statements to First Michigan shareholders and Huntington shareholders
following the review and clearance of such Proxy Statements and related proxy
materials by the Regulatory Authorities, (ii) the Parties shall furnish to each
other all information concerning them that they may reasonably request in
connection with such Proxy Statements,

                                     - 32 -


<PAGE>   39



(iii) the respective Boards of Directors of First Michigan and Huntington shall
recommend (subject to compliance with their fiduciary duties as advised by
counsel) to First Michigan's shareholders and Huntington's shareholders
respectively, the approval of the Merger Documents, and (iv) the respective
Boards of Directors and officers of First Michigan and Huntington shall (subject
to compliance with their fiduciary duties as advised by counsel) use their
reasonable efforts to obtain such shareholders' approval.

         4.4 APPLICATIONS. Huntington shall promptly prepare and file, and First
Michigan shall cooperate in the preparation and, where appropriate, the filing
of, applications with all Regulatory Authorities having jurisdiction over the
transactions contemplated by the Merger Documents, seeking the requisite
Consents necessary to consummate the transactions contemplated by the Merger
Documents.

         4.5 AGREEMENT AS TO EFFORTS TO CONSUMMATE. Subject to the terms and
conditions of this Agreement, each Party agrees to use, and to cause its
Subsidiaries to use, its reasonable efforts to take, or cause to be taken, all
actions, and to do, or cause to be done, all things necessary, proper, or
advisable under applicable Laws to consummate and make effective, as soon as
practicable after the date of this Agreement, the transactions contemplated by
the Merger Documents, including using its reasonable efforts to lift or rescind
any Order adversely affecting its ability to consummate such transactions and to
cause to be satisfied the conditions referred to in Article 7 of this Agreement;
provided, that nothing herein shall preclude either Party from exercising its
rights under this Agreement. Each Party shall use, and shall cause each of its
Subsidiaries to use, its reasonable efforts to obtain all Consents necessary or
desirable for the consummation of the transactions contemplated by the Merger
Documents. The Parties shall deliver to each other, copies of all filings,
correspondence, and orders to and from all Regulatory Authorities in connection
with the transactions contemplated by the Merger Documents.

         4.6      INVESTIGATION AND CONFIDENTIALITY.
                                                   
                  (a) Prior to the Effective Time, each Party shall keep the
other Party advised of all material developments relevant to its business and to
consummation of the Merger and shall permit the other Party to make or cause to
be made such investigation of the business and properties of it and its
Subsidiaries and of their respective financial and legal conditions as the other
Party reasonably requests, provided that such investigation shall be made after
reasonable prior notice and during regular business hours, shall be reasonably
related to the transactions contemplated by the Merger Documents, and shall not
interfere unnecessarily with normal operations. No investigation by a Party
shall affect the representations and warranties of the other Party.

                  (b) Each Party shall, and shall cause its advisers and agents
to, maintain the confidentiality of all confidential information furnished to it
by the other Party concerning its and its Subsidiaries' businesses, operations,
and financial positions and shall not use such information for any purpose
except in furtherance of the transactions contemplated by the Merger Documents.
If this Agreement is terminated prior to the Effective Time, each Party shall
promptly return or certify the destruction of all documents and copies thereof,
and all work papers containing confidential information received from the other
Party.

                                     - 33 -


<PAGE>   40



                  (c) Each Party agrees to give the other Party notice as soon
as practicable after any determination by it of any fact or occurrence relating
to the other Party which it has discovered through the course of its
investigation and which represents, or is reasonably likely to represent, either
a material breach of any representation, warranty, covenant or agreement of the
other Party or which has had or is reasonably likely to have a Material Adverse
Effect on the other Party.

                  (d) Promptly after the execution of this Agreement, First
Michigan will use its best efforts to make available to Huntington complete and
correct copies of all deeds and leases in the possession of any First Michigan
Company relating to the Real Property.

         4.7 PRESS RELEASES. Prior to the Effective Time, First Michigan and
Huntington shall consult with each other as to the form and substance of any
press release or other public disclosure materially related to the Merger
Documents or any other transaction contemplated thereby; provided, that nothing
in this Section 4.7 shall be deemed to prohibit any Party from making any
disclosure which its counsel deems necessary or advisable in order to satisfy
such Party's disclosure obligations imposed by Law.

         4.8 TAX AND ACCOUNTING TREATMENT. Each of the Parties undertakes and
agrees to use its reasonable efforts to cause the Merger, and to take no action
which would cause the Merger not, to qualify for treatment as a "reorganization"
within the meaning of Section 368(a) of the Internal Revenue Code for federal
income tax purposes and as a "pooling of interests" for accounting treatment.

         4.9 NO RIGHTS TRIGGERED. Each Party shall take all reasonable steps
necessary to ensure that entering into the Merger Documents and the consummation
of the transactions contemplated thereby do not and will not (i) result in the
grant of any Rights to any Person under its respective Governing Documents, (ii)
result in the grant of any Rights to any Person under the First Michigan Rights
Agreement or the Huntington Rights Agreement, (ii) result in separation from the
shares of First Michigan Common of the Rights granted under the First Michigan
Rights Agreement or separation from the shares of Huntington Common of the
Rights granted under the Huntington Rights Agreement, (iii) permit any holder of
any of the Rights under the First Michigan Rights Agreement or the Huntington
Rights Agreement to exercise any such Rights, or (iv) give any Person any Right
to purchase any securities issued by Huntington, including, without limitation,
any Rights as a result of a "Flip-over Transaction or Event" under Section 3.2
of the First Michigan Rights Agreement.

                                    ARTICLE 5
                           COVENANTS OF FIRST MICHIGAN
                           ---------------------------

         5.1 CONDUCT OF THE BUSINESS. From the date of this Agreement until the
earlier of the Effective Time or the termination of this Agreement, unless the
prior written consent of Huntington shall have been obtained, and except as
otherwise expressly contemplated herein, First Michigan shall and shall cause
each of its Subsidiaries to (i) operate its business only in the usual, regular,
and

                                     - 34 -


<PAGE>   41



ordinary course, and (ii) preserve intact its business organization and Assets
and maintain its rights and franchises.

         5.2 NEGATIVE COVENANTS OF FIRST MICHIGAN. From the date of this
Agreement until the earlier of the Effective Time or the termination of this
Agreement, First Michigan covenants and agrees that it will not do or agree or
commit to do, or permit any of its Subsidiaries to do or agree or commit to do,
any of the following without the prior written consent of the chief executive
officer, president, or chief financial officer of Huntington, which consent
shall not be unreasonably withheld:

                  (a) take any action which to its Knowledge at the time of such
action, would (i) materially adversely affect the ability of any Party to
consummate the transactions contemplated under the Merger Documents, (ii)
materially adversely affect the ability of any Party to obtain any Consents
required for the consummation of the transactions contemplated under the Merger
Documents without imposition of a condition or restriction of the type referred
to in the last sentences of Section 7.1(b) or 7.1(c) of this Agreement, or (iii)
materially adversely affect the ability of any Party to perform its covenants
and agreements under the Merger Documents.

                  (b) amend the Governing Documents of any First Michigan 
Company;

                  (c) engage in any acquisition, or take any other action, that
adversely affects the ability of First Michigan to consummate the transactions
contemplated by the Merger Documents;

                  (d) take any action that is intended to result in or actually
results in (i) any of its representations and warranties set forth in this
Agreement being or becoming untrue in any material respect at any time prior to
the Effective Time, (ii) any of the conditions to the Merger set forth in
Article 7 hereof not being satisfied, or (iii) a violation of any provisions of
the Merger Documents, except, in every case, as may be required by applicable
Law.

                  (e) incur any additional debt obligation or other obligation
for borrowed money except in the ordinary course of the business of First
Michigan and its Subsidiaries consistent with past practices (which shall
include creation of deposit liabilities, purchases of federal funds, advances
from the Federal Reserve Bank or Federal Home Loan Bank, and entry into
repurchase agreements fully secured by U.S. government or agency securities), or
impose, or suffer the imposition, on any Asset of First Michigan of any Lien or
permit any such Lien to exist (other than in connection with deposits,
repurchase agreements, bankers acceptances, "treasury tax and loan" accounts
established in the ordinary course of business, the satisfaction of legal
requirements in the exercise of trust powers, and Liens in effect as of the date
hereof that are disclosed in the Disclosure Memorandum);

                  (f) repurchase, redeem, or otherwise acquire or exchange
(other than purchases or exchanges in the ordinary course under employee benefit
plans), directly or indirectly, any shares, or any securities convertible into
any shares, of the capital stock of First Michigan, or declare or pay any
dividend, in cash or in any other property of any kind, including, but not
limited to, shares of the capital stock of any class of any First Michigan
Company, or make any other distribution in respect of First Michigan's capital
stock, provided that First Michigan may (to the extent legally and

                                     - 35 -


<PAGE>   42



contractually permitted to do so), but is not obligated hereunder to do so,
declare and pay its regular quarterly cash dividends on the shares of First
Michigan Common, in an amount or amounts not in excess of $0.18 per share of
First Michigan Common per quarter, with usual and regular record and payment
dates in accordance with past practices, as disclosed in the First Michigan
Financial Statements or in Section 5.2(f) of the Disclosure Memorandum; provided
that Huntington and First Michigan shall coordinate with each other regarding
the declaration of any dividends in respect of shares of First Michigan Common
and Huntington Common, and the record and payment dates relating thereto, so
that the holders of First Michigan Common shall receive at least one dividend,
but not more than one dividend, for any calendar quarter with respect to their
shares of First Michigan Common or the shares of Huntington Common to be issued
in exchange for such shares of First Michigan Common in the Merger.

                  (g) except pursuant to the exercise of the First Michigan
Stock Options outstanding as of the date hereof, the exercise price of which has
been established and provided to Huntington prior to the date hereof, and
pursuant to the terms thereof in existence on the date hereof, and except for
the First Michigan 1997 Stock Dividend, issue, sell, pledge, encumber, authorize
the issuance of, enter into any Contract to issue, sell, pledge, encumber, or
authorize the issuance of, or otherwise permit to become outstanding, any
additional shares of First Michigan Common or any other capital stock of any
First Michigan Company, or any Rights with respect thereto;

                  (h) adjust, split, combine, or reclassify any capital stock of
any First Michigan Company, or issue or authorize the issuance of any other
securities in respect of or in substitution for shares of First Michigan Common,
or sell, lease, mortgage or otherwise dispose of any Asset (other than Assets
acquired as a result of debts previously contracted) other than in the ordinary
course of business for reasonable and adequate consideration;

                  (i) except for purchases of U.S. Treasury securities or U.S.
Government agency securities, which in either case have maturities of three
years or less, purchase any securities or make any material investment, either
by purchase of stock of securities, contributions to capital, Asset transfers,
or purchase of any Assets, in any Person other than a wholly owned First
Michigan Subsidiary, or otherwise acquire direct or indirect control over any
Person, other than in connection with (i) foreclosures in the ordinary course of
business, (ii) acquisitions of control by a depository institution Subsidiary in
its fiduciary capacity, or (iii) the creation of new wholly owned subsidiaries
organized to conduct and continue activities otherwise permitted by this
Agreement;

                  (j) (i) grant any increase in compensation or benefits to the
employees or officers of any First Michigan Company, except as made in the
ordinary course of business and not inconsistent with past practices or as
required by Law; (ii) pay any severance or termination pay or any bonus other
than pursuant to written policies or written Contracts in effect on the date of
this Agreement, except as disclosed in Section 5.2(j) of the Disclosure
Memorandum; (iii) enter into or amend any severance agreements with officers of
First Michigan; (iv) grant any increase in fees or other increases in
compensation or other benefits to the directors of First Michigan; (v)
voluntarily accelerate the vesting of any employee benefits, other than pursuant
to written policies or written Contracts in effect on the date of this
Agreement; or (vi) grant any stock appreciation rights, cash

                                     - 36 -


<PAGE>   43



awards, or any Rights to acquire First Michigan securities under any First
Michigan Stock Option Plan;

                  (k) enter into or amend any employment Contract between First
Michigan and any Person (unless such amendment is required by Law) that First
Michigan does not have the unconditional right to terminate without Liability
(other than Liability for services already rendered), at any time on or after
the Effective Time;

                  (l) adopt any new First Michigan Benefit Plan for any First
Michigan Company or terminate or withdraw from, or make any material change in
or to, any existing First Michigan Benefit Plan other than any such change that
is required by Law or that, in the opinion of counsel, is necessary or advisable
to maintain the tax qualified status of any such plan, or make any distributions
from or contribution or payment to such First Michigan Benefit Plans except as
required by Law or the terms of such plans and consistent with First Michigan's
past practice;

                  (m) make any significant change in any Tax or accounting
methods or systems of internal accounting controls, except as may be appropriate
to conform to changes in Tax Laws or regulatory accounting requirements or GAAP;

                  (n) commence any Litigation other than in the ordinary course
of business in accordance with past practice, settle any Litigation involving
any Liability of First Michigan for material money damages or restrictions upon
the operations of First Michigan;

                  (o) except in the ordinary course of business and consistent
with past practice, (i) enter into, modify, amend or terminate any material
Contract (ii) waive, release, compromise or assign any material rights or
claims, or (iii) incur any capital expenditures, obligations or liabilities;

                  (p) enter into any agreement or commitment of the character 
referred to in Section 2.7 hereof; or

                  (q) take or permit to be taken any action of a character which
is otherwise listed in Section 2.15 hereof.

         5.3 CERTAIN ACTIONS. Except with respect to the Merger Documents and
the transactions contemplated thereby, neither First Michigan nor any Affiliate
or any Representatives thereof retained by First Michigan shall directly or
indirectly solicit, encourage, or, except to the extent necessary to comply with
the fiduciary duties of First Michigan's Board of Directors, as advised by
counsel, entertain, any proposal to engage in an Acquisition Transaction by any
Person. Except to the extent necessary to comply with the fiduciary duties of
First Michigan's Board of Directors, as advised by counsel, neither First
Michigan nor any Affiliate or Representative thereof shall fail to recommend
that First Michigan shareholders vote in favor of the Merger or withdraw such as
recommendation previously made, fail to solicit proxies of the shareholders of
First Michigan, or fail to hold the First Michigan Shareholders' Meeting, or
shall furnish any non-public information that it is not legally obligated to
furnish in connection with, negotiate with respect to, or enter into any
Contract with respect to, any Acquisition Transaction, but First Michigan may
communicate and

                                     - 37 -


<PAGE>   44



disclose information about such a proposal to engage in an Acquisition
Transaction to its shareholders if and to the extent that it is required to do
so in order to comply with its legal obligations as advised by counsel. First
Michigan shall promptly notify Huntington orally and in writing in the event
that it receives any inquiry or proposal relating to any Acquisition
Transaction. First Michigan shall (i) immediately cease and cause to be
terminated any existing activities, discussions, or negotiations with any
Persons conducted heretofore with respect to any of the foregoing, and (ii)
direct and use its reasonable efforts to cause all of its Representatives not to
engage in any of the foregoing. Notwithstanding anything contained in the Merger
Documents to the contrary, any action taken by First Michigan or its Affiliates
or Representatives which is permitted under this Section 5.3 by virtue of such
action being necessary to comply with the fiduciary duties of First Michigan's
Board of Directors, as advised by counsel, shall not constitute a breach of any
of the Merger Documents by First Michigan.

         5.4 AGREEMENTS WITH RESPECT TO AFFILIATES. First Michigan has disclosed
in Section 5.4 of the Disclosure Memorandum all Persons whom it reasonably
believes is an "affiliate" of First Michigan for purposes of Rule 145 under the
1933 Act. First Michigan shall use its reasonable efforts to cause each such
Person to deliver to Huntington not later than 30 days prior to the Effective
Time, a written agreement, in a form reasonably satisfactory to both parties,
providing that such Person will not sell, pledge, transfer, or otherwise dispose
of the shares of First Michigan Common held by such Person except as
contemplated by such agreement or by the Merger Documents and will not sell,
pledge, transfer, or otherwise dispose of the shares of Huntington Common to be
received by such Person upon consummation of the Merger except in compliance
with applicable provisions of the 1933 Act.

         5.5 CERTAIN POLICIES OF FIRST MICHIGAN. At the request of Huntington,
First Michigan shall use its best efforts to modify and change its loan,
litigation, and real estate valuation policies and practices (including loan
classifications and levels of reserves) prior to the Effective Time so as to be
consistent on a mutually satisfactory basis with those of Huntington and GAAP.
First Michigan shall not be required to modify or change any such policies or
practices, however, until such time as (i) satisfaction of the conditions set
forth in Sections 7.1(a), 7.1(b), and 7.1(c) of this Agreement, (ii) First
Michigan and Huntington agree that the Effective Time will occur prior to the
public disclosure of such modifications or changes in regular periodic earnings
releases or periodic reports filed with the Regulatory Authorities, and (iii)
Huntington acknowledges in writing that all conditions to its obligation to
consummate the Merger (and Huntington's rights to terminate this Agreement) have
been waived or satisfied; provided, that in all circumstances First Michigan
shall make such modifications and changes not later than immediately prior to
the Effective Time. First Michigan's representations, warranties, covenants, and
agreements contained in this Agreement shall not be deemed to be untrue or
breached in any respect for any purpose as a consequence of any modifications or
changes undertaken solely on account of this Section 5.5.

         5.6 AGREEMENTS WITH RESPECT TO FIRST MICHIGAN STOCK OPTION PLANS. First
Michigan will take such action necessary to ensure that no options issued under
the First Michigan 1997 Director Stock Option Plan will be exercised and, prior
to the Effective Time, First Michigan will cancel all stock options previously
granted under the First Michigan 1997 Director Stock Option Plan for no
consideration to the holders thereof. Additionally, First Michigan shall cause
Messrs.

                                     - 38 -


<PAGE>   45



David M. Ondersma, Stephen A. Stream, Larry D. Fredricks and Merle J. Prins to
not exercise any stock appreciation rights granted to such individuals under any
First Michigan Stock Option Plan and will use its reasonable efforts to cause
all other holders of stock appreciation rights granted under any First Michigan
Stock Option Plan to not exercise such stock appreciation rights. If any such
stock appreciation rights are exercised, First Michigan will cause the payment
to be made only in shares of First Michigan Common.

                                    ARTICLE 6
                             COVENANTS OF HUNTINGTON
                             -----------------------

         6.1 NEGATIVE COVENANTS OF HUNTINGTON. From the date of this Agreement
until the earlier of the Effective Time or the termination of this Agreement,
Huntington covenants and agrees that it will not do or agree or commit to do, or
permit any of its Subsidiaries to do or agree or commit to do, any of the
following without the prior written consent of the chief executive officer of
First Michigan, which consent shall not be unreasonably withheld:

                  (a) take any action which to its Knowledge at the time of such
action, would (i) materially adversely affect the ability of any Party to
consummate the transactions contemplated under the Merger Documents, (ii)
materially adversely affect the ability of any Party to obtain any Consents
required to consummate the transactions contemplated under the Merger Documents
without imposition of a condition or restriction of the type referred to in the
last sentences of Section 7.1(b) or 7.1(c) of this Agreement, or (iii)
materially adversely affect the ability of any Party to perform its covenants
and agreements under the Merger Documents;

                  (b) amend the Governing Documents of Huntington or the
Huntington Rights Agreement, in each case, in any manner adverse to the holders
of First Michigan Common as compared to rights of holders of Huntington Common
generally as of the date of this Agreement;

                  (c) engage in any acquisition, or take any other action, that
adversely affects the ability of Huntington to consummate the transactions
contemplated by the Merger Documents; or

                  (d) take any action that is intended or may reasonably be
expected to result in (i) any of its representations and warranties set forth in
this Agreement being or becoming untrue in any material respect at any time
prior to the Effective Time, (ii) any of the conditions to the Merger set forth
in Article 7 hereof not being satisfied, or (iii) a violation of any provisions
of the Merger Documents, except, in every case, as may be required by applicable
Law.

         6.2 NASDAQ LISTING. Huntington shall use its reasonable efforts to
provide, prior to the Effective Time, for quotation on the Nasdaq National
Market the shares of Huntington Common to be issued to the holders of shares of
First Michigan Common pursuant to the Merger, and Huntington shall give all
notices and make all filings with the NASD, required in connection with the
transactions contemplated herein.

                                     - 39 -


<PAGE>   46



         6.3      EMPLOYEE BENEFITS AND CONTRACTS.
                                                 
                  (a) Except as set forth in this Agreement, or in Section
4.2(c) of the Merger Agreement relating to the conversion of First Michigan
Stock Options, following the Effective Time, Huntington shall provide to
officers and employees of First Michigan who become officers or employees of any
Huntington Company after the Effective Time employee benefits under Huntington
Benefit Plans, and stock option and other plans involving the potential issuance
of Huntington Common Stock, on terms and conditions which when taken as a whole
are substantially similar to those currently provided generally by Huntington
and its Affiliates to their similarly situated officers and employees. For
purposes of participation and vesting under such Huntington Benefit Plans, the
service of the employees of the First Michigan Companies prior to the Effective
Time shall be treated as service with a Huntington Company participating in such
Huntington Benefit Plans. Furthermore, officers and employees of First Michigan
Companies (and their spouses and dependents, if applicable) may, upon the
cessation of their participation in a First Michigan Benefit Plan, immediately
participate in the corresponding Benefit Plan maintained by Huntington without
regard to pre-existing conditions or waiting periods. Benefit accruals under any
Huntington Pension Plan will not be offset by benefit accruals under any First
Michigan Pension Plan; however, in the event the First Michigan Pension Plan
merges with the Huntington Pension Plan, and if benefit accruals under the First
Michigan Pension Plan cease, the Huntington Pension Plan will provide future
benefit accruals under the Huntington Pension Plan that are no less than those
benefits that would accrue assuming the Huntington Pension Plan implements a
"fresh start formula without wear away" (as described in Treasury Regulation
Section 1.401(a)(4)-13(c)(4)(i)).

                  (b) Huntington undertakes and agrees to provide all persons
who are employed by First Michigan immediately prior to the Effective Time with
severance benefits consistent with Huntington's Transition Pay Plan as in effect
as of the Effective Time, which benefits will not be less than those provided
under such plan as of the date of this Agreement; provided, however, that (i)
Huntington will assume the obligations of First Michigan under certain
Continuity Agreements between First Michigan and the persons identified in
Section 6.3(b) of the Disclosure Memorandum, and (ii) for a period of one year
following the Effective Date, Huntington agrees to provide those First Michigan
employees identified in Section 6.3(b) of the Disclosure Memorandum (other than
those persons who are parties to such Continuity Agreements) with severance
benefits according to First Michigan's severance benefits as of the date of this
Agreement. If any benefits are paid to any former First Michigan employees under
such First Michigan severance policies (including, but not limited to, such
Continuity Agreements), such benefits shall be in lieu of any and all other
benefits that might otherwise be payable under the Huntington Transition Pay
Plan.

                  (c) Huntington agrees that the First Michigan Bonus Pool shall
be allocated among the First Michigan Bonus Plan Participants in accordance with
the terms of the First Michigan Bonus Plan as of the Effective Time and
Huntington shall pay any and all such allocated bonus payments to the First
Michigan Bonus Pool Participants on or before February 28, 1998. All First
Michigan Bonus Plan Participants shall be eligible to participate in the
Huntington Management Incentive Compensation Plan beginning as of the Effective
Date, to the extent that any such employee is eligible under the terms of such
Huntington plan.

                                     - 40 -


<PAGE>   47



         6.4      INDEMNIFICATION OF DIRECTORS AND OFFICERS.
                                                           
                  (a) For a period of six years after the Effective Time, to the
fullest extent permitted by applicable Law, Huntington shall, and shall cause
its Subsidiaries to, indemnify, defend, and hold harmless the present and former
directors, officers, employees, and agents of the First Michigan Companies
(each, an "Indemnified Party") against all Liabilities arising out of actions or
omissions arising out of the Indemnified Party's service or services as
directors, officers, employees, or agents of First Michigan or, at First
Michigan's request, of another corporation, partnership, joint venture, trust,
or other enterprise occurring at or prior to the Effective Time (including the
transactions contemplated by the Merger Documents) consistent with First
Michigan's Governing Documents and Michigan Law as in effect on the date hereof,
whether or not any Huntington Company is insured against such matter, including
provisions relating to advances of expenses incurred in the defense of any
Litigation, with respect to any Liability, claim, demand, action, or Litigation
asserted or made prior to or at any time after the Effective Time. All such
rights to indemnification with respect to any such Liability, claim, demand, or
action shall continue until the final disposition of such Litigation and/or
Liability; provided, however, that nothing contained herein shall increase or
lengthen the duration of obligations with respect to such indemnification by the
Huntington or any other Huntington Company over that to which First Michigan
would have been subject had the Merger not been consummated. All rights to
exculpation from liability and limitation of liability provided by Article IX of
First Michigan's Articles of Incorporation and the provisions of this Section
6.4 shall survive the Effective Time and the consummation of the Merger. Without
limiting the foregoing, in any case in which approval by Huntington is required
to effectuate any indemnification, Huntington shall direct, at the election of
the Indemnified Party, that the determination of any such approval shall be made
by independent counsel mutually agreed upon between Huntington and the
Indemnified Party.

                  (b) For a period of six years after the Effective Date,
Huntington shall use reasonable efforts to procure and maintain that portion of
directors' and officers' liability insurance that serves to reimburse the
Persons who are serving as officers or directors of First Michigan on the date
of this Agreement with respect to claims against such Persons arising from facts
or events which occurred prior to the Effective Time, which insurance shall
provide at least the same coverage and amounts, and contain terms and conditions
no less advantageous, as that coverage currently provided by First Michigan to
such Persons; provided, however, that in no event will Huntington be required to
expend more than $300,000 to procure or maintain such insurance; provided,
further, that if Huntington is unable to procure or maintain the insurance
called for in this paragraph (b), Huntington shall use reasonable efforts to
obtain as much comparable insurance as is available for $300,000; and provided,
further, that such Persons may be required to make application and provide
customary representations and warranties to Huntington's insurance carrier for
the purpose of obtaining such insurance.

                  (c) The provisions of this Section 6.4 are intended to be for
the benefit of, and shall be enforceable by, each Indemnified Party and each
Indemnified Party's heirs and representatives.

                                     - 41 -


<PAGE>   48



         6.5      STOCK OPTIONS.
                               
                  (a) At the Effective Time, each outstanding First Michigan
Stock Option shall be converted into an option to purchase shares of Huntington
Common in accordance with the terms of the Merger Agreement.

                  (b) As soon as practicable after the Effective Time,
Huntington shall deliver to the holders of such converted First Michigan Stock
Options appropriate notices setting forth such holders' rights pursuant to the
Huntington Stock Option Plan and the agreements evidencing such converted First
Michigan Stock Options and the original grants of such First Michigan Stock
Options shall continue in effect on the same terms and conditions (subject to
the adjustments required by this Section 6.5 after giving effect to the Merger
and the conversion as set forth in the Merger Agreement).

                  (c) Huntington shall use all reasonable efforts to maintain
the effectiveness of the registration statement(s) described in Section 3.3(c)
for so long as the First Michigan Stock Options to be converted under the terms
of the Merger Agreement to options to purchase shares of Huntington Common
remain outstanding. With respect to those individuals who subsequent to the
Merger will be subject to the reporting requirements under Section 16(a) of the
Exchange Act, where applicable, Huntington shall administer the Huntington Stock
Option Plan in a manner that complies with Rule 16-3 promulgated under the
Exchange Act to the extent the First Michigan Plan complied with such rule prior
to the Merger.

                                    ARTICLE 7
                CONDITIONS PRECEDENT TO OBLIGATIONS TO CONSUMMATE
                -------------------------------------------------

         7.1 CONDITIONS TO OBLIGATIONS OF EACH PARTY. The respective obligations
of each Party to perform this Agreement and consummate the Merger and the other
transactions contemplated by the Merger Documents are subject to the
satisfaction of the following conditions, unless waived by both Parties pursuant
to Section 10.6 of this Agreement:

                  (a) Shareholder Approval. The shareholders of First Michigan
and Huntington shall have approved this Agreement, and the consummation of the
transactions contemplated by the Merger Documents, including the Merger, as and
to the extent required by Law and by the provisions of any of their respective
Governing Documents.

                  (b) Regulatory Approvals. All Consents of, filings and
registrations with, and notifications to, all Regulatory Authorities required
for consummation of the Merger shall have been obtained or made and shall be in
full force and effect and all waiting periods required by Law shall have
expired. No Consent obtained from any Regulatory Authority which is necessary to
consummate the transactions contemplated by the Merger Documents shall be
conditioned or restricted in a manner (including requirements relating to the
raising of additional capital or the disposition of Assets) which in the
reasonable judgment of either Party would so materially

                                     - 42 -


<PAGE>   49



adversely impact the economic or business benefits of the transactions
contemplated by the Merger Documents so as to render inadvisable the
consummation of the Merger.

                  (c) Consents and Approvals. Each Party shall have obtained any
and all Consents required for consummation of the Merger (other than those
referred to in Section 7.1(b) of this Agreement) or for the preventing of any
Default under any Contract or Permit of such Party which, if not obtained or
made, is reasonably likely to have, individually or in the aggregate, a Material
Adverse Effect on such Party. No Consent so obtained which is necessary to
consummate the transactions contemplated by the Merger Documents shall be
conditioned or restricted in a manner which in the reasonable judgment of either
Party would so materially adversely impact the economic or business benefits of
the transactions contemplated by the Merger Documents so as to render
inadvisable the consummation of the Merger.

                  (d) Legal Proceedings. No court or governmental authority or
Regulatory Authority of competent jurisdiction shall have enacted, issued,
promulgated, enforced or entered any Law or Order (whether temporary,
preliminary or permanent) or taken any other action which prohibits, restricts
or makes illegal consummation of the transactions contemplated by the Merger
Documents.

                  (e) Registration Statement. The Registration Statement shall
be effective under the 1933 Act, no stop orders suspending the effectiveness of
the Registration Statement shall have been issued, no action, suit, proceeding
or investigation by the SEC to suspend the effectiveness thereof shall have been
initiated and be continuing, and all necessary approvals under state securities
Laws or the 1933 Act or 1934 Act relating to the issuance or trading of the
shares of Huntington Common issuable pursuant to the Merger shall have been
received.

                  (f) Nasdaq National Market Listing. The shares of Huntington 
Common issuable pursuant to the Merger shall have been approved for quotation on
the Nasdaq National Market.

                  (g) Tax Matters. Each Party shall have received a written
opinion of counsel from Huntington's Counsel, in form reasonably satisfactory to
such Parties (the "Tax Opinion"), to the effect that (i) the Merger will
constitute a reorganization within the meaning of Section 368(a) of the Internal
Revenue Code, (ii) the exchange in the Merger of shares of First Michigan Common
for shares of Huntington Common will not give rise to gain or loss to the
shareholders of First Michigan with respect to such exchange (except to the
extent of any cash received), and (iii) neither First Michigan nor Huntington
will recognize gain or loss as a consequence of the Merger. In rendering such
Tax Opinion, such counsel shall be entitled to rely upon representations of
First Michigan's officers, directors, and shareholders holding in excess of five
percent (5%) of the outstanding shares of First Michigan Common and
representations of officers of Huntington, in each case reasonably satisfactory
in form and substance to such counsel.

                                     - 43 -


<PAGE>   50



         7.2 CONDITIONS TO OBLIGATIONS OF HUNTINGTON. The obligations of
Huntington to perform this Agreement and consummate the Merger and the other
transactions contemplated by the Merger Documents are subject to the
satisfaction of the following conditions, unless waived by Huntington pursuant
to Section 10.6(a) of this Agreement:

                  (a) Representations and Warranties. For purposes of this
Section 7.2(a), the accuracy of the representations and warranties of First
Michigan set forth in this Agreement shall be assessed as of the date of this
Agreement and as of the Effective Time with the same effect as though all such
representations and warranties had been made on and as of the Effective Time
(provided that representations and warranties which are confined to a specified
date shall speak only as of such date). The representations and warranties of
First Michigan set forth in Article 2 of this Agreement shall be true and
correct in all material respects.

                  (b) Performance of Agreements and Covenants. Each and all of
the agreements and covenants of First Michigan to be performed and complied with
pursuant to this Agreement and the other agreements contemplated by the Merger
Documents prior to the Effective Time shall have been duly performed and
complied with in all material respects.

                  (c) Certificates. First Michigan shall have delivered to
Huntington (i) a certificate, dated as of the Effective Time and signed on its
behalf by its chief executive officer and its chief financial officer, to the
effect that the conditions of its obligations set forth in Section 7.2(a) and
7.2(b) of this Agreement have been satisfied, and (ii) certified copies of
resolutions duly adopted by First Michigan's Board of Directors and shareholders
evidencing the taking of all corporate action necessary to authorize the
execution, delivery, and performance of the Merger Documents and the
consummation of the transactions contemplated thereby, all in such reasonable
detail as Huntington and its counsel shall request.

                  (d) Opinion of Counsel. Huntington shall have received an
opinion of Varnum, Riddering, Schmidt & Howlett llp, counsel to First Michigan,
dated as of the Effective Date, in form reasonably satisfactory to Huntington,
as to the matters set forth in Exhibit 2.

                  (e) Accountant's Letters. Huntington shall have received: (i)
from First Michigan's auditors letters dated not more than five days prior to
the date of the Huntington Proxy Statement with respect to certain financial
information regarding First Michigan, in form and substance reasonably
satisfactory to Huntington, which letters shall be based upon customary
specified procedures undertaken by such firm in accordance with Statement of
Auditing Standard No. 72; and (ii) from Ernst & Young an Opinion Letter to the
effect that the Merger will qualify for pooling of interests accounting
treatment if consummated in accordance with the Merger Documents.

                  (f) Affiliates' Agreements. Huntington shall have received 
from each Affiliate of First Michigan the affiliate's agreement as and to the
extent specified in Section 5.4 of this Agreement.

                                     - 44 -


<PAGE>   51



                  (g) Shareholders' Equity. First Michigan's shareholders'
equity as of the end of last fiscal quarter preceding the Effective Date shall
not be less than 95% of First Michigan's shareholders' equity as of December 31,
1996, excluding for purposes of the calculation of such shareholders' equity,
the effects of: (i) any reductions in First Michigan's shareholders' equity
resulting from any actions or changes in policies of First Michigan taken at the
request of Huntington, including those described in Section 5.5 of this
Agreement; and (ii) all costs, fees and charges, including fees and charges of
First Michigan's accountants, counsel and investment bankers, whether or not
accrued or paid, that are related to the negotiation and consummation of the
Merger.

                  (h) Warrant. First Michigan shall have executed and delivered
to Huntington the Warrant Purchase Agreement and the Warrant.

                  (i) Fairness Opinion. Huntington shall have received from
Morgan Stanley & Co. Incorporated or such other investment banking firm retained
by Huntington, a letter dated not more than five business days prior to the date
of the Huntington Proxy Statement, as to the fairness of the Merger to the
shareholders of Huntington from a financial point of view.

         7.3 CONDITIONS TO OBLIGATIONS OF FIRST MICHIGAN. The obligations of
First Michigan to perform this Agreement and consummate the Merger and the other
transactions contemplated by the Merger Documents are subject to the
satisfaction of the following conditions, unless waived by First Michigan
pursuant to Section 10.6(b) of this Agreement:

                  (a) Representations and Warranties. For purposes of this
Section 7.3(a), the accuracy of the representations and warranties of Huntington
set forth in this Agreement shall be assessed as of the date of this Agreement
and as of the Effective Time with the same effect as though all such
representations and warranties had been made on and as of the Effective Time
(provided that representations and warranties which are confined to a specified
date shall speak only as of such date). The representations and warranties of
Huntington set forth in Article 3 of this Agreement shall be true and correct in
all material respects.

                  (b) Performance of Agreements and Covenants. Each and all of
the agreements and covenants of Huntington to be performed and complied with
pursuant to this Agreement and the other agreements contemplated by the Merger
Documents prior to the Effective Time shall have been duly performed and
complied with in all material respects, and the Registration Statement shall
have been declared and shall remain effective.

                  (c) Certificates. Huntington shall have delivered to First
Michigan (i) a certificate, dated as of the Effective Time and signed on its
behalf by its chief executive officer and its chief financial officer, to the
effect that the conditions of its obligations set forth in Section 7.3(a) and
7.3(b) of this Agreement have been satisfied, and (ii) certified copies of
resolutions duly adopted by Huntington's Board of Directors and shareholders
evidencing the taking of all corporate action necessary to authorize the
execution, delivery and performance of the Merger Documents and the consummation
of the transactions contemplated thereby, all in such reasonable detail as First
Michigan and its counsel shall request.

                                     - 45 -


<PAGE>   52



                  (d) Opinion of Counsel. First Michigan shall have received an
opinion of Porter, Wright, Morris & Arthur, counsel to Huntington, dated as of
the Effective Time, in form reasonably acceptable to First Michigan, as to the
matters set forth in Exhibit 3.

                  (e) Accountant's Letters. First Michigan shall have received
from Ernst & Young an Opinion Letter to the effect that the Merger will qualify
for pooling of interests accounting treatment if consummated in accordance with
the Merger Documents.

                  (f) Fairness Opinion. First Michigan shall have received a
letter from Merrill, Lynch & Co., dated not more than five business days prior
to the date of the First Michigan Proxy Statement, to the effect that, in the
opinion of such firm, the Conversion Ratio in connection with the Merger is
fair, from a financial point of view, to the shareholders of First Michigan.

                                    ARTICLE 8
                                     CLOSING
                                     -------

         The closing of the Merger and the other transactions contemplated under
the Merger Documents shall take place at the offices of Porter, Wright, Morris &
Arthur, in Columbus, Ohio, at 10:00 a.m., local time, on the date that is five
business days after the last of the conditions specified in Article 7 hereof
shall have been satisfied or waived, in accordance with the terms of this
Agreement, or at such other place or time as the parties shall hereafter agree
in writing. Notwithstanding the foregoing, the Merger will become effective as
of the Effective Time.

                                    ARTICLE 9
                                   TERMINATION
                                   -----------

         9.1 TERMINATION. Notwithstanding any other provision of this Agreement,
and notwithstanding the approval of the Merger Documents by the shareholders of
Huntington or First Michigan, this Agreement may be terminated and the Merger
abandoned at any time prior to the Effective Time:

                  (a) By mutual consent of the respective Boards of Directors of
Huntington and First Michigan;

                  (b) By the Board of Directors of either Party (provided that
the terminating Party is not then in material breach of any representation,
warranty, covenant, or other agreement contained in this Agreement) in the event
of the inaccuracy of any representation or warranty contained in this Agreement
of the other Party which cannot be or has not been cured within 30 days after
the giving written notice to such other Party of such inaccuracy and which
inaccuracy would provide the terminating Party the ability to refuse to
consummate the Merger under the applicable standard set forth in Section 7.2(a)
of this Agreement in the case of any termination by Huntington and Section
7.3(a) of this Agreement in the case of any termination by First Michigan;

                                     - 46 -


<PAGE>   53



                  (c) By the Board of Directors of either Party (provided that
the terminating Party is not then in material breach of any representation,
warranty, covenant, or other agreement contained in this Agreement) in the event
of a material breach by the other Party of any covenant or agreement contained
in this Agreement which cannot be or has not been cured within 30 days after the
giving of written notice to the breaching Party of such breach;

                  (d) By the Board of Directors of either Party (provided that
the terminating Party is not then in material breach of any representation,
warranty, covenant, or other agreement contained in this Agreement) in the event
(i) any Consent of any Regulatory Authority required for consummation of the
Merger and the other transactions contemplated by the Merger Documents shall
have been denied by final nonappealable action of such authority or if any
action taken by such authority is not appealed within the time limit for appeal,
or (ii) the shareholders of Huntington or First Michigan fail to vote their
approval of this Agreement and the transactions contemplated by the Merger
Documents as required by the Laws of the States of Maryland and Michigan,
respectively, or by their respective Governing Documents, at the Shareholders'
Meetings where the transactions were presented to such shareholders for approval
and voted upon;

                  (e) By the Board of Directors of either Party in the event
that the Merger shall not have been consummated by May 31, 1998, if the failure
to consummate the transactions contemplated by the Merger Documents on or before
such date is not caused by any breach of this Agreement by the Party electing to
terminate pursuant to this Section 9.1(e);

                  (f) By the Board of Directors of either Party (provided that
the terminating Party is not then in material breach of any representation,
warranty, covenant, or other agreement contained in this Agreement) in the event
that any of the conditions precedent to the obligations of such Party to
consummate the Merger cannot be satisfied or fulfilled by the date specified in
Section 9.1(e) of this Agreement;

                  (g) By Huntington, in the event that the Board of Directors of
First Michigan fails to recommend to the shareholders of First Michigan that
they vote their shares of First Michigan Common in favor of the Merger, or
withdraws such recommendation previously made, or fails to solicit proxies of
shareholders of First Michigan to approve the Merger, or shall have affirmed,
recommended, or authorized entering into any Acquisition Transaction or other
transaction involving a merger, share exchange, consolidation, or transfer of
substantially all of the Assets of First Michigan;

                  (h) By First Michigan, in the event that the Board of
Directors of Huntington fails to recommend to the shareholders of Huntington
that they vote their shares of Huntington Common in favor of the Merger, or
withdraws such recommendation previously made, or fails to solicit proxies of
shareholders of Huntington to approve the Merger;

                  (i) By First Michigan, if the Board of Directors of First
Michigan determines, pursuant to the right provided First Michigan pursuant to
Section 4.2(a)(i) of the Merger Agreement, that the Parties are unable to agree
upon a renegotiated Conversion Ratio.

                                     - 47 -


<PAGE>   54



         9.2 EFFECT OF TERMINATION. In the event of the termination and
abandonment of this Agreement pursuant to Section 9.1 of this Agreement, the
Merger Agreement and this Agreement shall become void and have no effect, except
that (i) the provisions of this Section 9.2 and Articles 1 and 10 and Section
4.6(b) of this Agreement shall survive any such termination and abandonment, and
(ii) a termination pursuant to Sections 9.1(b), 9.1(c), or 9.1(f) of this
Agreement shall not relieve the breaching Party from Liability for an uncured
willful breach of a representation, warranty, covenant, or agreement giving rise
to such termination. Upon a termination of this Agreement, the Warrant and the
Warrant Purchase Agreement shall terminate in accordance with the express
provisions of those documents.

         9.3 NON-SURVIVAL OF REPRESENTATIONS AND COVENANTS. The respective
representations, warranties, obligations, covenants, and agreements of the
Parties shall not survive the Effective Time, except this Section 9.3 and
Articles 1 and 10 and Sections 4.6, 4.8, 5.4, 6.3, 6.4, and 6.5 of this
Agreement.

                                   ARTICLE 10
                                  MISCELLANEOUS
                                  -------------

         10.1 EXPENSES. Except as otherwise provided in Section 10.2, each of
the Parties shall bear and pay all direct costs and expenses incurred by it or
on its behalf in connection with the transactions contemplated hereunder,
including filing, registration and application fees, printing fees, and fees and
expenses of its own financial or other consultants, investment bankers,
accountants, and counsel, except that each of the Parties shall bear and pay
one-half of the filing fees payable in connection with the Registration
Statement and the Proxy Statements and printing costs incurred in connection
with the printing of the Registration Statement and the Proxy Statements.

         10.2     TERMINATION FEE.
                                 

                    (a)  If any of the following events (a "Triggering     
                         Event") occurs:                                   
                            
                         (i)  any material, willful, and intentional breach of
                              the Merger Documents by First Michigan that would
                              permit Huntington to terminate the Merger
                              Documents (A) occurring after the receipt by First
                              Michigan of a proposal to engage in an Acquisition
                              Transaction, (B) occurring after the announcement
                              by any other Person of an intention to engage in
                              an Acquisition Transaction, or (C) in anticipation
                              and for the purpose of engaging in an Acquisition
                              Transaction;

                         (ii) (A) a proposal to engage in an Acquisition
                              Transaction is submitted to and approved by the
                              shareholders of First Michigan at any time prior
                              to May 31, 1999, or (B) a Tender Offer is
                              commenced and the transactions contemplated in the
                              Tender Offer are completed in such a manner that
                              the Person

                                     - 48 -


<PAGE>   55



                              making the Tender Offer acquires beneficial
                              ownership of more than 20 percent of the capital
                              stock or any other class of voting securities of
                              First Michigan, and the Merger is not consummated
                              prior to May 31, 1999;

                    (iii)     (A) a proposal to engage in an Acquisition
                              Transaction is received by First Michigan or a
                              Tender Offer is made directly to the shareholders
                              of First Michigan or the intention of making an
                              Acquisition Transaction or Tender Offer is
                              announced at any time prior to the holding of the
                              First Michigan Shareholders' Meeting; (B) the
                              Board of Directors of First Michigan (1) fails to
                              recommend to the shareholders of First Michigan
                              that they vote their shares of First Michigan
                              Common in favor of the approval of the Merger, (2)
                              withdraws such recommendation previously made, (3)
                              fails to solicit proxies of shareholders of First
                              Michigan to approve the Merger, or (4) fails to
                              hold the First Michigan Shareholders' Meeting; and
                              (C) the Merger is not consummated by May 31, 1999;

First Michigan shall pay to Huntington an amount in cash equal to the sum of (i)
the direct costs and expenses or portion thereof referred to in Section 10.1,
incurred by or on behalf of Huntington in connection with the transactions
contemplated by the Merger Documents, but in no event to exceed $1 million in
the aggregate, and (ii) $22,000,000; which sum represents additional
compensation for Huntington's loss as the result of the transactions
contemplated by the Merger Documents not being consummated. The amounts shall be
an obligation of First Michigan and shall be paid by First Michigan promptly
upon notice to First Michigan by Huntington.

                  (b) Notwithstanding the foregoing, no amount will be due
Huntington pursuant to Section 10.2(a) in the event of the failure to consummate
the Merger solely as a result of any of the following: (i) the failure of the
shareholders of Huntington to approve the Merger; (ii) the failure of any
Regulatory Authority to provide any required Consent to the Merger, which
failure was not the result of the existence of a proposal to engage in an
Acquisition Transaction or a breach by First Michigan of any of its obligations
under any of the Merger Documents; or (iii) the Merger Documents are terminated
pursuant to Section 9.1, unless the event giving rise to the right to terminate
is preceded by a Triggering Event or the receipt by First Michigan of a proposal
to engage in an Acquisition Transaction, or the announcement by another Person
of a proposal involving an Acquisition Transaction.

                  (c) Nothing contained in this Section 10.2 shall constitute or
shall be deemed to constitute liquidated damages for the willful breach by a
Party of the terms of this Agreement or otherwise limit the rights of the
nonbreaching Party.

         10.3     BROKERS AND FINDERS. Except for Merrill, Lynch, & Co., as to 
First Michigan, and Morgan Stanley & Co. Incorporated, as to Huntington, each of
the Parties represents and warrants

                                     - 49 -


<PAGE>   56



that neither it nor any of its officers, directors, employees, or Affiliates has
employed any broker or finder or incurred any Liability for any financial
advisory fees, investment banker's fees, brokerage fees, commissions, or
finders' fees in connection with this Agreement or the transactions contemplated
by the Merger Documents. In the event of a claim by any broker or finder based
upon his or its representing or being retained by or allegedly representing or
being retained by First Michigan or Huntington, each of First Michigan and
Huntington, as the case may be, agrees to indemnify and hold the other Party
harmless of and from any Liability in respect of any such claim.

         10.4 ENTIRE AGREEMENT. Except as otherwise expressly provided herein,
the Merger Documents (including the documents and instruments referred to
herein) constitute the entire agreement between the Parties with respect to the
transactions contemplated hereunder and supersede all prior arrangements or
understandings with respect thereto, written or oral. Nothing in this Agreement
thereunder expressed or implied, is intended to confer upon any Person, other
than the Parties or their respective successors, any rights, remedies,
obligations, or liabilities under or by reason of the Merger Documents.

         10.5 AMENDMENTS. To the extent permitted by Law, the Merger Documents
may be amended by a subsequent writing signed by each of the Parties upon the
approval of the Boards of Directors of each of the Parties, whether before or
after shareholder approval of the Merger Documents has been obtained; provided,
that after any such approval by the holders of shares of First Michigan Common
or Huntington Common, there shall be made no amendment that pursuant to Michigan
or Maryland Law requires further approval by such shareholders without the
further approval of such shareholders.

         10.6     WAIVERS.

                  (a) Prior to or at the Effective Time, Huntington, acting
through its Board of Directors, chief executive officer or other authorized
officer, shall have the right to waive any Default in the performance of any
term of this Agreement by First Michigan, to waive or extend the time for the
compliance or fulfillment by First Michigan of any and all of its obligations
under this Agreement, and to waive any or all of the conditions precedent to the
obligations of Huntington under this Agreement, except any condition which, if
not satisfied, would result in the violation of any Law. No such waiver shall be
effective unless in writing signed by a duly authorized officer of Huntington.

                  (b) Prior to or at the Effective Time, First Michigan, acting
through its Board of Directors, chief executive officer or other authorized
officer, shall have the right to waive any Default in the performance of any
term of this Agreement by Huntington, to waive or extend the time for the
compliance or fulfillment by Huntington of any and all of its obligations under
this Agreement, and to waive any or all of the conditions precedent to the
obligations of First Michigan under this Agreement, except any condition which,
if not satisfied, would result in the violation of any Law. No such waiver shall
be effective unless in writing signed by a duly authorized officer of First
Michigan.

                                     - 50 -


<PAGE>   57



                  (c) The failure of any Party at any time or times to require
performance of any provision hereof shall in no manner affect the right of such
Party at a later time to enforce the same or any other provision of this
Agreement. No waiver of any condition or of the breach of any term contained in
this Agreement in one or more instances shall be deemed to be or construed as a
further or continuing waiver of such condition or breach or a waiver of any
other condition or of the breach of any other term of this Agreement.

         10.7 ASSIGNMENT. Except as expressly contemplated hereby, neither this
Agreement nor any of the rights, interests or obligations hereunder shall be
assigned by any Party hereto (whether by operation of Law or otherwise) without
the prior written consent of the other Party. Subject to the preceding sentence,
this Agreement will be binding upon, inure to the benefit of and be enforceable
by the Parties and their respective successors and assigns.

         10.8 NOTICES. All notices or other communications which are required or
permitted hereunder shall be in writing and sufficient if delivered by hand, by
facsimile transmission, by registered or certified mail, postage pre-paid, or by
courier or overnight carrier, to the persons at the addresses set forth below
(or at such other address as may be provided hereunder), and shall be deemed to
have been delivered as of the date so delivered:
<TABLE>
         
         <S>                 <C>
         First Michigan:     First Michigan Bank Corporation
                             One Financial Plaza
                             10717 Adams Street
                             Holland Michigan  49423
                             Attention:    David M. Ondersma, Chairman and Chief Executive
                                           Officer
                             Telecopy number: (616) 355-8608

         Copy to Counsel:    Varnum, Riddering, Schmidt & Howlett, LLP
                             Bridgewater Place
                             P.O. Box 352
                             333 Bridge Street, N.W.
                             Grand Rapids, Michigan  49501-0352 (49504 for deliveries)
                             Attention:  Donald L. Johnson, Esq.
                             Telecopy number:  (616) 336-7000

         Huntington:         Zuheir Sofia
                             President
                             Huntington Bancshares Incorporated
                             41 South High Street
                             Columbus, Ohio 43287
                             Telecopy number:  (614) 480-5485
</TABLE>

                                     - 51 -


<PAGE>   58



         Copy to Counsel:           Ralph K. Frasier, Esq.
                                    General Counsel and Secretary
                                    Huntington Bancshares Incorporated
                                    41 South High Street
                                    Columbus, Ohio 43287
                                    Telecopy number:  (614) 480-5485

         Copy to Counsel:           Michael T. Radcliffe, Esq.
                                    Porter, Wright, Morris & Arthur
                                    41 South High Street
                                    Columbus, Ohio 43215
                                    Telecopy number:  (614) 227-2100

         10.9 GOVERNING LAW. This Agreement shall be governed by and construed
in accordance with the Laws of the State of Ohio, without regard to any
applicable conflicts of Laws, except to the extent that Maryland law governs
certain aspects of the Merger as it relates to Huntington or Michigan law
governs certain aspects of the Merger as it relates to First Michigan..

         10.10 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

         10.11    CAPTIONS.  The captions contained in this Agreement are for 
reference purposes only and are not part of this Agreement.

         10.12 INTERPRETATIONS. Neither this Agreement nor any uncertainty or
ambiguity herein shall be construed or resolved against any party, whether under
any rule of construction or otherwise. No party to this Agreement shall be
considered the draftsman. The parties acknowledge and agree that this Agreement
has been reviewed, negotiated and accepted by all parties and their attorneys
and shall be construed and interpreted according to the ordinary meaning of the
words used so as fairly to accomplish the purposes and intentions of all parties
hereto.

         10.13 ENFORCEMENT OF AGREEMENT. The Parties hereto agree that
irreparable damage would occur in the event that any of the provisions of this
Agreement was not performed in accordance with its specific terms or was
otherwise breached. It is accordingly agreed that the Parties shall be entitled
to an injunction or injunctions to prevent breaches of this Agreement and to
enforce specifically the terms and provisions hereof in any court of the United
States or any state having jurisdiction, this being in addition to any other
remedy to which they are entitled at law or in equity.

         10.14 SEVERABILITY. Any term or provision of this Agreement which is
invalid or unenforceable in any jurisdiction shall, as to that jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement or affecting the validity or enforceability of any of the terms or

                                     - 52 -


<PAGE>   59


provisions of this Agreement in any other jurisdiction. If any provision of this
Agreement is so broad as to be unenforceable, the provision shall be interpreted
to be only so broad as is enforceable.

         10.15 BENEFIT. Nothing in this Agreement, express or implied, is
intended to confer upon any Person other than the Parties and their successors
in interest any rights or remedies under or by reason of this Agreement.

         IN WITNESS WHEREOF, each of the Parties has caused this Agreement to be
executed on its behalf and its corporate seal to be hereunto affixed and
attested by officers thereunto as of the day and year first above written.

ATTEST:                              FIRST MICHIGAN BANK CORPORATION

/s/ Stephen A. Stream                By:/s/ David M. Ondersma
- -------------------------------         ---------------------------------------
Stephen A. Stream, Secretary            David M. Ondersma, Chairman and Chief
                                        Executive Officer

[CORPORATE SEAL]

ATTEST:                              HUNTINGTON BANCSHARES
                                     INCORPORATED

  /s/ Ralph K. Frasier               By: /s/ Frank Wobst
- -------------------------------         ---------------------------------------
Ralph K. Frasier, Secretary              Frank Wobst, Chairman and Chief 
                                         Executive Officer

[CORPORATE SEAL]

                                     - 53 -

<PAGE>   60
                                          EXHIBIT 1 TO SUPPLEMENTAL AGREEMENT

                           WARRANT PURCHASE AGREEMENT
                           --------------------------

         THIS WARRANT PURCHASE AGREEMENT (this "Agreement") is made as of May 5,
1997, between HUNTINGTON BANCSHARES INCORPORATED, a Maryland corporation
("Huntington"), and FIRST MICHIGAN BANK CORPORATION, a Michigan corporation
("First Michigan").

                                    RECITALS:
                                    ---------

         A. Concurrently herewith, Huntington and First Michigan have entered
into (i) a certain Agreement and Plan of Merger, dated as of the date hereof
(the "Merger Agreement"), which provides for the merger of First Michigan into
Huntington (the "Merger"), and (ii) a certain Supplemental Agreement, dated as
of the date hereof, which contains certain additional terms and conditions
relating to the Merger (the "Supplemental Agreement"). (The Merger Agreement and
the Supplemental Agreement are sometimes hereinafter collectively referred to as
the "Merger Documents.") All capitalized terms used herein and not otherwise
defined herein shall have the meanings ascribed to them in the Merger Documents.

         B. As a condition to Huntington's entering into the Merger Agreement
and the Supplemental Agreement, and in consideration therefor, First Michigan
has agreed to issue to Huntington a warrant or warrants entitling Huntington to
purchase up to a total of 5,268,716 shares of First Michigan Common, on the
terms and conditions set forth herein.

                                   AGREEMENT:
                                   ----------

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

         SECTION 1. ISSUANCE, DELIVERY, AND EXERCISE OF THE WARRANT.
Concurrently with the execution of the Merger Documents and this Agreement,
First Michigan shall execute a warrant in favor of Huntington in the form
attached as Attachment A hereto (the "Warrant") to purchase up to a total of
5,268,716 shares of First Michigan Common at a purchase price equal to $29.275
per share (the "Exercise Price"), subject to adjustments as provided in the
Warrant. (The holder of the Warrant from time to time is hereinafter referred to
as the "Holder.") The Warrant shall be exercisable in accordance with the terms
and conditions set forth therein.

         SECTION 2. REGISTRATION RIGHTS. If, at any time after the Warrant
becomes exercisable in accordance with its terms, First Michigan shall receive a
written request therefor from the Holder, First Michigan shall prepare and file
a registration statement under the 1933 Act covering such number of shares of
First Michigan Common as the Holder shall specify in the request and shall use
its best efforts to cause such registration statement to become effective;
provided, however, that the


<PAGE>   61



Holder shall only have the right to request three such registrations. Without
the written consent of the Holder, neither First Michigan nor any other holder
of securities of First Michigan may include any other securities in such
registration.

         SECTION 3. "PIGGYBACK" RIGHTS. If, at any time after the Warrant
becomes exercisable in accordance with its terms, First Michigan shall determine
to proceed with the preparation and filing of a registration statement under the
1933 Act in connection with the proposed offer and sale for money of any of its
securities (other than in connection with a dividend reinvestment, employee
stock purchase, stock option, or similar plan or a registration statement on
Form S-4) by it or any of its security holders, First Michigan shall give
written notice thereof to the Holder. Upon the written request of the Holder
given within ten days after receipt of any such notice from First Michigan,
First Michigan shall, except as herein provided, cause all shares of First
Michigan Common which the Holder shall request be included in such registration
statement to be so included; provided, however, that nothing herein shall
prevent First Michigan from abandoning or delaying any registration at any time;
and provided, further, that if First Michigan decides not to proceed with a
registration after the registration statement has been filed with the SEC and
First Michigan's decision not to proceed is primarily based upon the anticipated
public offering price of the securities to be sold by First Michigan, First
Michigan shall promptly complete the registration for the benefit of the Holder
if the Holder agrees to bear all additional and incremental expenses incurred by
First Michigan as the result of such registration after First Michigan has
decided not to proceed. If any registration pursuant to this Section shall be
underwritten in whole or in part, the Holder may require that any shares of
First Michigan Common requested for inclusion pursuant to this Section be
included in the underwriting on the same terms and conditions as the securities
otherwise being sold through the underwriters. In the event that the shares of
First Michigan Common requested for inclusion pursuant to this Section would
constitute more than 25 percent of the total number of shares to be included in
a proposed underwritten public offering, and if in the good faith judgment of
the managing underwriter of such public offering the inclusion of all of such
shares would interfere with the successful marketing of the shares of being
offered by First Michigan, the number of shares otherwise to be included in the
underwritten public offering hereunder may be reduced; provided, however, that
after any such required reduction, the shares of First Michigan Common to be
included in such offering for the account of the Holder shall constitute at
least 25 percent of the total number of shares to be included in such offering.

         SECTION 4. OBLIGATIONS OF FIRST MICHIGAN IN CONNECTION WITH A
REGISTRATION. If and whenever First Michigan is required by the provisions of
Sections 2 or 3 hereof to effect the registration of any shares of First
Michigan Common under the 1933 Act, First Michigan shall:

                  (a) prepare and file with the SEC a registration statement
with respect to such securities and use its best efforts to cause such
registration statement to become and remain effective for such period as may be
reasonably necessary to effect the sale of such securities, not to exceed nine
months;

                  (b) prepare and file with the SEC such amendments to such
registration statement and supplements to the prospectus contained therein as
may be necessary to keep such registration statement effective for such period
as may be reasonably necessary to effect the sale of such securities, not to
exceed nine months;


<PAGE>   62



                  (c) furnish to the Holder and to the underwriters of the
securities being registered such reasonable number of copies of the registration
statement, amendments thereto, preliminary prospectus, final prospectus, and
such other documents as the Holder or such underwriters may reasonably request
in order to facilitate the public offering of such securities;

                  (d) use its best efforts to register or qualify the securities
covered by such registration statement under such state securities or blue sky
laws of such jurisdictions as the Holder or such underwriters may reasonably
request; provided that First Michigan shall not be required by virtue hereof to
submit to the general jurisdiction of any state;

                  (e) notify the Holder, promptly after First Michigan shall
receive notice thereof, of the time when such registration statement or any
post-effective amendment thereof has become effective or a supplement to any
prospectus forming a part of such registration statement has been filed;

                  (f) notify the Holder promptly of any request by the SEC for 
the amending or supplementing of such registration statement or prospectus or
for additional information;

                  (g) prepare and file with the SEC, promptly upon the request
of the Holder, any amendments or supplements to such registration statement or
prospectus which, in the opinion of counsel for the Holder (and concurred in by
counsel for First Michigan), is required under the 1933 Act or the rules and
regulations promulgated thereunder in connection with the distribution of the
shares of First Michigan Common by the Holder;

                  (h) prepare and promptly file with the SEC such amendment or
supplement to such registration statement or prospectus as may be necessary to
correct any statements or omissions if, at the time when a prospectus is
required to be delivered under the 1933 Act, any event shall have occurred as
the result of which such prospectus as then in effect would include an untrue
statement of a material fact or omit to state any material fact necessary to
make the statements therein, in the light of the circumstances in which they
were made, not misleading;

                  (i) advise the Holder, promptly after it shall receive notice
or obtain knowledge thereof, of the issuance of any stop order by the SEC
suspending the effectiveness of such registration statement or the initiation or
threatening of any proceeding for that purpose and promptly use its best efforts
to prevent the issuance of any stop order or to obtain its withdrawal if such
stop order should be issued; and

                  (j) at the request of the Holder, furnish on the date or dates
provided for in the underwriting agreement: (i) an opinion or opinions of the
counsel representing First Michigan for the purposes of such registration,
addressed to the underwriters and to the Holder, covering such matters as such
underwriters and the Holder may reasonably request and as are customarily
covered by issuer's counsel at that time; and (ii) a letter or letters from the
independent certified public accountants of First Michigan, addressed to the
underwriters and to the Holder, covering such matters as such underwriters or
the Holder may reasonably request, in which letters such accountants shall
state (without limiting the generality of the foregoing) that they are
independent certified public accountants within the meaning of the 1933 Act and
that, in the opinion of such accountants, the financial statements and other
financial data of First Michigan included in the registration statement
<PAGE>   63



or any amendment or supplement thereto comply in all material respects with
the applicable accounting requirements of the 1933 Act.

         SECTION 5. EXPENSES OF REGISTRATION. With respect to a registration
requested pursuant to Section 2 hereof and with respect to each inclusion of
shares of First Michigan Common in a registration statement pursuant to Section
3 hereof, First Michigan shall bear the following fees, costs, and expenses: all
registration, stock exchange listing, and NASD fees, printing expenses, fees and
disbursements of counsel and accountants for First Michigan, fees and
disbursements of counsel for the underwriter or underwriters of such securities
(if First Michigan and/or the Holder are required to bear such fees and
disbursements), and all legal fees and disbursements and other expenses of
complying with state securities or blue sky laws of any jurisdictions in which
the securities to be offered are to be registered or qualified. Fees and
disbursements of counsel and accountants for the Holder, underwriting discounts
and commissions and transfer taxes relating to the First Michigan Common being
sold for the Holder, and any other expenses incurred by the Holder not expressly
included above shall be borne by the Holder.

         SECTION 6. INDEMNIFICATION.

                  (a) First Michigan shall indemnify and hold harmless the
Holder, any underwriter (as defined in the 1933 Act) for the Holder, and each
person, if any, who controls the Holder or such underwriter within the meaning
of the 1933 Act, from and against any and all loss, damage, liability, cost, and
expense to which the Holder or any such underwriter or controlling person may
become subject under the 1933 Act or otherwise, insofar as such losses, damages,
liabilities, costs, or expenses are caused by any untrue statement or alleged
untrue statement of any material fact contained in any registration statement
filed pursuant to Section 4 hereof, any prospectus or preliminary prospectus
contained therein, or any amendment or supplement thereto, or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances in which they are made, not misleading; provided,
however, that First Michigan will not be liable in any such case to the extent
that any such loss, damage, liability, cost, or expense arises out of or is
based upon an untrue statement or alleged untrue statement or omission or
alleged omission so made in conformity with information furnished by the Holder,
such underwriter, or such controlling persons in writing specifically for use in
the preparation thereof.

                  (b) Promptly after receipt by an indemnified party pursuant to
the provisions of paragraph (a) of this Section 6 of notice of the commencement
of any action involving the subject matter of the foregoing indemnity
provisions, such indemnified party shall, if a claim thereof is to be made
against First Michigan pursuant to the provision of such paragraph (a), promptly
notify First Michigan of the commencement thereof; but the omission to so notify
First Michigan will not relieve it from any liability which it may have to any
indemnified party otherwise hereunder. In case such action is brought against
any indemnified party and such indemnified party notifies First Michigan of the
commencement thereof, First Michigan shall have the right to participate in
and, to the extent that it may wish to do so, to assume the defense
thereof, with counsel satisfactory to such indemnified party; provided,
however, if the defendants in any action include both the indemnified party and
First Michigan and there is a conflict of interest which would prevent counsel
for First Michigan from also representing the indemnified party, the
indemnified party or parties shall have the right to select one separate
counsel to participate in the defense of such action on behalf of such
<PAGE>   64



indemnified party or parties. After notice from First Michigan to such
indemnified party of its election so to assume the defense of any such action,
the indemnified party shall have the right to participate in such action and to
retain its own counsel, but First Michigan shall not be required to indemnify
and hold harmless the indemnified party pursuant to the provisions of such
paragraph (a) for any   legal fees or other expenses subsequently incurred by
such indemnified party in connection with the defense thereof, other than
reasonable costs of investigation, unless (i) the indemnified party shall have
employed separate counsel in accordance with the provisions of the preceding
sentence of this paragraph (b), (ii) First Michigan shall not have employed
counsel satisfactory to the indemnified party to represent the indemnified
party within a reasonable time after the notice of the commencement of the
action, or (iii) First Michigan has authorized the employment of counsel for
the indemnified party at the expense of First Michigan.

                  (c) If recovery is not available under the foregoing
indemnification provisions, for any reason other than as specified therein, the
parties entitled to indemnification by the terms thereof shall be entitled to
contribution to liabilities and expenses, except to the extent that contribution
is not permitted under Section 11(f) of the 1933 Act. In determining the amount
of contribution to which the respective parties are entitled, there shall be
considered the parties' relative knowledge and access to information concerning
the matter with respect to which the claim was asserted, the opportunity to
correct and prevent any statement or omission, and any other equitable
considerations appropriate under the circumstances.

         SECTION 7. REPURCHASE RIGHTS.

                  (a) At any time after the Warrant becomes exercisable and
prior to the expiration of the Warrant, in accordance with the terms thereof:

                    (i) First Michigan may, and upon the written request of the
          Holder, First Michigan shall, repurchase the Warrant from the Holder
          at a price (the "Warrant Repurchase Price") equal to the difference
          between the "Market/Offer Price" (as defined in paragraph (b) below)
          and the Exercise Price, multiplied by the number of shares for which
          the Warrant may then be exercised, in the aggregate, but only if the
          Market/Offer Price is greater than the Exercise Price; and

                    (ii) First Michigan may, and upon the written request of the
          owner (the "Owner") of any shares of First Michigan Common purchased
          pursuant to an exercise of the Warrant ("Warrant Stock"), First
          Michigan shall, repurchase all of the shares of Warrant Stock held by
          such Owner at a price (the "Warrant Stock Repurchase Price") equal to
          the number of shares to be repurchased hereunder multiplied by the
          greater of the Exercise Price and the Market/Offer Price.

                  (b) For purposes of paragraph (a) of this Section 7, the
"Market/Offer Price" shall mean the highest of (i) the price per share at which
a tender offer or exchange offer for shares of First Michigan Common has been
made, (ii) the price per share of First Michigan Common to be paid by any third
party pursuant to an agreement with First Michigan, and (iii) the highest
closing price for shares of First Michigan Common within the 4-month period
immediately preceding the date the Holder gives notice of the required
repurchase of the Warrant or the Owner gives notice of the required repurchase
of Warrant Stock, as appropriate. In the event that an exchange offer is made




<PAGE>   65

or an agreement is entered into for a merger or consolidation involving
consideration other than cash, the value of the securities or other property
issuable or deliverable in exchange for First Michigan Common shall be
determined by a nationally recognized investment banking firm mutually
acceptable to the parties hereto.

                  (c) The Holder and the Owner may exercise their respective
rights to require First Michigan to repurchase the Warrant or the Warrant Stock
pursuant to this Section 7 by surrendering for such purpose to First Michigan,
at its principal office, the Warrant or certificates for shares of Warrant
Stock, as the case may be, free and clear of any liens, claims, encumbrances, or
rights of third parties of any kind, accompanied by a written notice or notices
stating that the Holder or the Owner, as the case may be, requests First
Michigan to repurchase such Warrant or Warrant Stock in accordance with the
provisions of this Section 7. Subject to the last proviso of paragraph 7(d)
below, as promptly as practicable, and in any event within five business days
after the surrender of the Warrant or certificates representing shares of
Warrant Stock and the receipt of such notice or notices relating thereto, First
Michigan shall deliver or cause to be delivered to the Holder or Owner the
Warrant Repurchase Price or the Warrant Stock Repurchase Price therefor, as
applicable, or the portion thereof which First Michigan is not then prohibited
under applicable law and regulation from so delivering.

                  (d) To the extent that First Michigan is prohibited under
applicable law or regulation, or as a result of administrative or judicial
action, from repurchasing the Warrant and/or the Warrant Stock in full at any
time that it may be required to do so hereunder, First Michigan shall
immediately so notify the Holder and/or the Owner and thereafter deliver or
cause to be delivered, from time to time, to the Holder and/or the Owner, as
appropriate, the portion of the Warrant Repurchase Price and the Warrant Stock
Repurchase Price, respectively, which it is no longer prohibited from
delivering, within five business days after the date on which First Michigan is
no longer so prohibited. Upon receipt of such notice from First Michigan and for
a period of 15 days thereafter, the Holder and/or Owner may revoke its notice of
repurchase of the Warrant and/or Warrant Stock by written notice to First
Michigan at its principal office stating that the Holder and/or the Owner elects
to revoke its election to exercise its right to require First Michigan to
repurchase the Warrant and/or Warrant Stock, whereupon First Michigan will
promptly deliver to the Holder and/or Owner the Warrant and/or certificates
representing shares of Warrant Stock surrendered to First Michigan for purposes
of such repurchase. Whether or not such election is revoked, First Michigan
hereby agrees to use its best efforts to obtain all required legal and
regulatory approvals necessary to permit First Michigan to repurchase the
Warrant and/or the Warrant Stock as promptly as practicable.

         SECTION 8. ASSUMPTION OF OBLIGATIONS UNDER THIS AGREEMENT. First
Michigan will not enter into any transaction described in paragraph 5(a) of the
Warrant unless the "Acquiring Corporation" (as that term is defined in the
Warrant) assumes in writing all the obligations of First Michigan hereunder.

         SECTION 9. REMEDIES. Without limiting the foregoing or any remedies
available to the Holder, First Michigan specifically acknowledges that neither
Huntington nor any successor holder of the Warrant would have an adequate remedy
at law for any breach of this Warrant Purchase Agreement and First Michigan
hereby agrees that Huntington and any successor holder of the 


<PAGE>   66

Warrant shall be entitled to specific performance of the obligations of First
Michigan hereunder and injunctive relief against actual or threatened violations
of the provisions hereof.

         SECTION 10.  TERMINATION.  This Agreement will terminate upon a 
termination of the Warrant in accordance with Section 9 thereof.

         In Witness Whereof, the parties hereto have executed this Warrant
Purchase Agreement as of the day and year first above written.


                                HUNTINGTON BANCSHARES INCORPORATED

                                By:
                                   -----------------------------------------
                                   Frank Wobst, Chairman and Chief Executive 
                                    Officer

                                FIRST MICHIGAN BANK CORPORATION

                                By:
                                   ------------------------------------------
                                     David M. Ondersma, Chairman and Chief 
                                     Executive Officer
<PAGE>   67
                                      ATTACHMENT A TO WARRANT PURCHASE AGREEMENT

THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR REGISTERED OR
QUALIFIED UNDER ANY STATE SECURITIES LAWS, AND MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED WITHOUT BEING SO REGISTERED OR QUALIFIED UNLESS AN EXEMPTION OR
EXEMPTIONS FROM SUCH REGISTRATION OR QUALIFICATION REQUIREMENTS ARE AVAILABLE.

                                     WARRANT
                                     -------

                       TO PURCHASE 5,268,716 COMMON SHARES

                                       of

                         FIRST MICHIGAN BANK CORPORATION

         This is to certify that, for value received, HUNTINGTON BANCSHARES
INCORPORATED, a Maryland corporation ("Huntington"), is entitled to purchase
from FIRST MICHIGAN BANK CORPORATION, a Michigan corporation ("First Michigan"),
at any time on or after the date hereof, an aggregate of up to 5,268,716 common
shares, $1.00 par value per share, of First Michigan ("First Michigan Common"),
at a price of $29.275 per share (the "Exercise Price"), subject to the terms and
conditions of this Warrant and a certain Warrant Purchase Agreement, of even
date herewith, between Huntington and First Michigan (the "Warrant Purchase
Agreement"). The number of shares of First Michigan Common which may be received
upon the exercise of this Warrant and the Exercise Price are subject to
adjustment from time to time as hereinafter set forth. The terms and conditions
set forth in this Warrant and the Warrant Purchase Agreement shall be binding
upon the respective successors and assigns of both of the parties hereto. This
Warrant is issued in connection with a certain Agreement and Plan of Merger,
dated as of the date hereof, between Huntington and First Michigan (the "Merger
Agreement"), which provides for the merger of First Michigan into Huntington
(the "Merger"), and a certain Supplemental Agreement between Huntington and
First Michigan, which provides certain additional terms and conditions relating
to the Merger (the "Supplemental Agreement"). The Merger Agreement and the
Supplemental Agreement are sometimes hereinafter collectively referred to as the
"Merger Documents." All capitalized terms used herein and not otherwise defined
herein shall have the meanings ascribed to them in the Merger Documents. The
term "Holder" shall mean and refer to Huntington or any successor holder of this
Warrant.

         SECTION 1.  EXERCISE OF THE WARRANT.

                  (a) The Holder will not exercise this Warrant unless it has
obtained all required approvals, if any, of appropriate regulatory authorities
having jurisdiction, including the Federal Reserve Board, pursuant to all
applicable laws and regulations. Further, subject to the terms and conditions
set forth in this Warrant and in the Warrant Purchase Agreement and the
provisions of


<PAGE>   68



applicable law, the Holder will not exercise this Warrant without the written
consent of First Michigan except upon the occurrence of any of the following
events (a "Triggering Event"):


                  (i)      any material, willful, and intentional breach
                           of the Merger Documents by First Michigan that would
                           permit Huntington to terminate the Merger Documents
                           (A) occurring after the receipt by First Michigan of
                           a proposal to engage in an Acquisition Transaction,
                           (B) occurring after the announcement by any other
                           Person of an intention to engage in an Acquisition
                           Transaction, or (C) in anticipation and for the
                           purpose of engaging in an Acquisition Transaction;

                  (ii)     (A) a proposal to engage in an Acquisition
                           Transaction is submitted to and approved by the
                           shareholders of First Michigan at any time prior to
                           May 31, 1999, or (B) a Tender Offer is commenced and
                           the transactions contemplated in the Tender Offer
                           are completed in such a manner that the Person
                           making the Tender Offer acquires beneficial
                           ownership of more than 20 percent of the capital
                           stock or any other class of voting securities of
                           First Michigan, and the Merger is not consummated
                           prior to May 31, 1999;

                  (iii)    (A) a proposal to engage in an Acquisition
                           Transaction is received by First Michigan or a
                           Tender Offer is made directly to the shareholders of
                           First Michigan or the intention of   making an
                           Acquisition Transaction or Tender Offer is announced
                           at any time prior to the holding of the First
                           Michigan Shareholders' Meeting; (B) the Board of
                           Directors of First Michigan (1) fails to recommend
                           to the shareholders of First Michigan that they vote
                           their shares of First Michigan Common in favor of
                           the approval of the Merger, (2) withdraws such
                           recommendation previously made, (3) fails to solicit
                           proxies of shareholders of First Michigan to approve
                           the Merger, or (4) fails to hold the First Michigan
                           Shareholders' Meeting; and (C) the Merger is not
                           consummated by May 31, 1999;


                  (b) Notwithstanding the foregoing, this Warrant shall not be
exercisable in the event of the failure to consummate the Merger solely as a
result of any of the following: (i) the failure of the shareholders of
Huntington to approve the Merger; (ii) the failure of any Regulatory Authority
to provide any required Consent to the Merger, which failure was not the result
of the existence of the Acquisition Proposal or a breach by First Michigan of
any of its obligations under any of the Merger Documents; or (iii) the Merger
Documents are terminated pursuant to Section 9.1 of the Supplemental Agreement,
unless the event giving rise to the right to terminate is preceded by

                                      - 2 -


<PAGE>   69



a Triggering Event or the receipt by First Michigan of an Acquisition
Transaction proposal, or the announcement by another Person of a proposal
involving an Acquisition Transaction.

                  (c) An "Acquisition Transaction" shall mean a transaction
involving (A) the sale or other disposition of more than 20 percent of the
shares of the capital stock or any other class of voting securities of First
Michigan, including, but not limited to, a Tender Offer, (B) the sale or other
disposition of 15 percent or more of the consolidated assets or deposits of
First Michigan or of the banks owned by First Michigan, in the aggregate, or (C)
a merger or consolidation involving First Michigan other than a transaction
pursuant to which First Michigan will be the surviving corporation and the
current shareholders of First Michigan will be the owners of a majority of the
stock of the surviving corporation following the transaction. As used in this
Section 1, "person" or "group of persons" shall have the meanings assigned to
such terms by Section 13(d) of the 1934 Act. For purposes of this Section 1, a
Tender Offer which is contingent upon the expiration of the Warrant is deemed to
commence when it is announced.

                  (d) This Warrant shall be exercised by presentation and
surrender hereof to First Michigan at its principal office accompanied by (i) a
written notice of exercise for a specified number of shares of First Michigan
Common, (ii) payment to First Michigan, for the account of First Michigan, of
the Exercise Price for the number of shares specified in such notice, and (iii)
a certificate of the Holder indicating the Triggering Event that has occurred
which entitles the Holder to exercise this Warrant. The Exercise Price for the
number of shares of First Michigan Common specified in the notice shall be
payable in immediately available funds.

                  (e) Upon such presentation and surrender, First Michigan shall
issue promptly (and within three business days if requested by the Holder) to
the Holder, or any assignee, transferee, or designee permitted by subparagraph
(g) of this Section 1, the shares to which the Holder is entitled hereunder.

                  (f) If this Warrant should be exercised in part only, First
Michigan shall, upon surrender of this Warrant for cancellation, execute and
deliver a new Warrant evidencing the rights of the Holder thereof to purchase
the balance of the shares purchasable hereunder. Upon receipt by First Michigan
of this Warrant, in proper form for exercise, the Holder shall be deemed to be
the holder of record of the shares of First Michigan Common issuable upon such
exercise, notwithstanding that the stock transfer books of First Michigan shall
then be closed or that certificates representing such shares of First Michigan
Common shall not then be actually delivered to the Holder. First Michigan shall
pay all expenses, and any and all federal, state, and local taxes and other
charges that may be payable in connection with the preparation, issue, and
delivery of stock certificates under this Section 1 in the name of the Holder or
of any assignee, transferee, or designee permitted by subparagraph (g) of this
Section 1.

                  (g) This Warrant, once exercisable, or any warrant shares
acquired by the Holder by its exercise, may be sold or transferred in whole or
in part to any person, subject to the receipt by such person of approvals of
appropriate regulatory authorities having jurisdiction, including the Federal
Reserve Board, pursuant to all applicable laws and regulations, to the extent
required.

                                      - 3 -


<PAGE>   70



         SECTION 2. CERTAIN COVENANTS AND REPRESENTATIONS OF FIRST MICHIGAN.
                    -------------------------------------------------------
                  (a) First Michigan shall at all times maintain sufficient
authorized but unissued shares of First Michigan Common so that this Warrant may
be exercised without additional authorization of the holders of First Michigan
Common, after giving effect to all other options, warrants, convertible
securities, and other rights to purchase First Michigan Common.

                  (b) First Michigan represents and warrants to the Holder that
the shares of First Michigan Common issued upon an exercise of this Warrant will
be duly authorized, fully paid, non-assessable, and subject to no preemptive
rights.

                  (c) First Michigan agrees (i) that it will not, by charter
amendment or through reorganization, consolidation, merger, dissolution or sale
of assets, or by any other voluntary act, avoid or seek to avoid the observance
or performance of any of the covenants, stipulations, or conditions to be
observed or performed hereunder by First Michigan; (ii) promptly to take all
action as may from time to time be required, including, without limitation (A)
complying with all pre-merger notification, reporting, and waiting period
requirements specified in 15 U.S.C. Section 18a and regulations promulgated
thereunder, and (B) in the event, under the Bank Holding Company Act of 1956, as
amended (the "Bank Holding Company Act"), or the Change in Bank Control Act of
1978, or other statute, the prior approval of the Federal Reserve Board or other
regulatory agency (collectively, the "Agencies"), is necessary before the
Warrant may be exercised or transferred, cooperate fully with the Holder in
preparing such applications and providing such information to the Agencies as
the Agencies may require in order to permit the Holder to exercise or transfer
this Warrant and First Michigan duly and effectively to issue shares pursuant to
the exercise hereof; and (iii) promptly to take all action provided herein to
protect the rights of the Holder against dilution.

         SECTION 3. FRACTIONAL SHARES. First Michigan shall not be required to
issue fractional shares of First Michigan Common upon an exercise of this
Warrant but shall pay for such fraction of a share in cash or by certified or
official bank check at the Exercise Price.

         SECTION 4. EXCHANGE OR LOSS OF WARRANT. This Warrant is exchangeable,
without expense, at the option of the Holder, upon presentation and surrender
hereof at the principal office of First Michigan for other Warrants of different
denominations entitling the Holder thereof to purchase in the aggregate the same
number of shares of First Michigan Common purchasable hereunder. The term
"Warrant" as used herein includes any warrants for which this Warrant may be
exchanged. Upon receipt by First Michigan of evidence reasonably satisfactory to
it of the loss, theft, destruction, or mutilation of this Warrant, and (in the
case of loss, theft, or destruction) of reasonably satisfactory indemnification,
and upon surrender and cancellation of this Warrant, if mutilated, First
Michigan will execute and deliver a new Warrant of like tenor and date. Any such
new Warrant executed and delivered shall constitute an additional contractual
obligation on the part of First Michigan, whether or not the Warrant so lost,
stolen, destroyed, or mutilated shall at any time be enforceable by anyone.

                                      - 4 -


<PAGE>   71



         SECTION 5. CERTAIN TRANSACTIONS.

                  (a) In case First Michigan shall (i) consolidate with or merge
into any Person, other than Huntington or one of its Affiliates, and shall not
be the continuing or surviving corporation of such consolidation or merger, (ii)
permit any Person, other than Huntington or one of its Affiliates, to merge into
First Michigan and First Michigan shall be the continuing or surviving
corporation, but, in connection with such merger, the then outstanding shares of
First Michigan Common shall be changed into or exchanged for stock or other
securities of any other Person or cash or any other property, or (iii) sell or
otherwise transfer all or substantially all of its assets to any Person, other
than Huntington or one of its Affiliates, then, and in any such case, the
agreement governing such transaction shall make proper provision so that this
Warrant shall, upon the consummation of any such transaction and upon the terms
and conditions set forth herein, be converted into, or exchanged for, a warrant,
at the option of the Holder, of either (A) the Acquiring Corporation (as
hereinafter defined), (B) any company which controls the Acquiring Corporation,
or (C) in the case of a merger described in clause (a)(ii) above, First
Michigan, in which case such warrant shall be a newly issued warrant (in any
such case, the "Substitute Warrant").

                  (b) For purposes of this Section 5, the following terms have 
the meanings indicated:

                    (i) "Acquiring Corporation" shall mean (A) the continuing or
          surviving corporation of a consolidation or merger with First Michigan
          (if other than First Michigan), (B) the corporation merging into First
          Michigan in a merger in which First Michigan is the continuing or
          surviving person and in connection with which the then outstanding
          shares of First Michigan Common are changed into or exchanged for
          stock or other securities of any other Person or cash or any other
          property, or (C) the transferee of all or substantially all of First
          Michigan's assets;

                    (ii) "Substitute Common" shall mean the common stock issued
          by the issuer of the Substitute Warrant;

                    (iii) "Assigned Value" shall mean the Market/Offer Price as
          determined pursuant to paragraph 7(b) of the Warrant Purchase
          Agreement; provided, however, that in the event of a sale of all or
          substantially all of First Michigan's assets, the Assigned Value shall
          be the sum of the price paid in such sale for such assets and the
          current market value of the remaining assets of First Michigan as
          determined by a recognized investment banking firm selected by the
          Holder, divided by the number of shares of First Michigan Common
          outstanding at the time of such sale;

                    (iv) "Average Price" shall mean the average closing price of
          a share of Substitute Common for the one year immediately preceding
          the consolidation, merger, or sale in question, but in no event higher
          than the closing price of the shares of Substitute Common on the day
          preceding such consolidation, merger, or sale; provided that if First
          Michigan is the issuer of the Substitute

                                      - 5 -


<PAGE>   72



          Warrant, the Average Price shall be computed with respect to a share
          of the common stock issued by the Person merging into First Michigan
          or by any company which controls such Person, as the Holder may elect;

                    (v) A "Person" shall mean any individual, firm, corporation
          or other entity and include as well any syndicate or group deemed to
          be a "person" by Section 13(d)(3) of the Securities Exchange Act of
          1934, as amended; and

                    (vi) "Affiliate" shall have the meaning ascribed to such
          term in Rule 12b-2 of the General Rules and Regulations under the
          Securities Exchange Act of 1934, as amended.

                  (c) The Substitute Warrant shall have the same terms as this
Warrant, provided that, if the terms of the Substitute Warrant cannot, for legal
reasons, be the same as this Warrant, such terms shall be as similar as possible
and in no event less advantageous to the Holder. The issuer of the Substitute
Warrant shall also enter into an agreement with the then Holder of the
Substitute Warrant in substantially the same form as the Warrant Purchase
Agreement, which shall be applicable to the Substitute Warrant.

                  (d) The Substitute Warrant shall be exercisable for such
number of shares of Substitute Common as is equal to the Assigned Value
multiplied by the number of shares of First Michigan Common for which this
Warrant is then exercisable, divided by the Average Price. The exercise price of
the Substitute Warrant per share of Substitute Common shall be equal to the
Exercise Price multiplied by a fraction in which the numerator is the number of
shares of First Michigan Common for which this Warrant is then exercisable and
the denominator is the number of shares of Substitute Common for which the
Substitute Warrant is exercisable.

         SECTION 6. RIGHTS OF THE HOLDER; REMEDIES.

                  (a) The Holder shall not, by virtue hereof and prior to the
exercise hereof, be entitled to any rights of a holder of First Michigan Common.

                  (b) Without limiting the foregoing or any remedies available
to the Holder, First Michigan specifically acknowledges that neither Huntington
nor any successor Holder of this Warrant would have an adequate remedy at law
for any breach of this Warrant and First Michigan hereby agrees that Huntington
and any successor Holder shall be entitled to specific performance of the
obligations of First Michigan hereunder and injunctive relief against actual or
threatened violations of the provisions hereof.

         SECTION 7.  ANTIDILUTION PROVISIONS.  The number of shares of First 
Michigan Common purchasable upon the exercise hereof shall be subject to
adjustment from time to time as provided in this Section 7.

                  (a) In the event that First Michigan issues any additional
shares of First Michigan Common at any time after the date hereof (including
pursuant to stock option plans), the number of

                                      - 6 -


<PAGE>   73



shares of First Michigan Common which can be purchased pursuant to this Warrant
shall be increased by an amount equal to 19.9 percent of the additional shares
so issued.

               (b)      (i) In the event that, after the date hereof, First
          Michigan pays or makes a dividend or other distribution of any class
          of capital stock of First Michigan in First Michigan Common
          (including, but not limited to, the issuance of the First Michigan
          1997 Stock Dividend), the number of shares of First Michigan Common
          purchasable upon exercise hereof shall be increased by multiplying
          such number of shares by a fraction of which the denominator shall be
          the number of shares of First Michigan Common outstanding at the close
          of business on the day immediately preceding the date of such
          distribution and the numerator shall be the sum of such number of
          shares and the total number of shares constituting such dividend or
          other distribution, such increase to become effective immediately
          after the opening of business on the day following such distribution.

                    (ii) In the event that, after the date hereof, outstanding
          shares of First Michigan Common are subdivided into a greater number
          of shares of First Michigan Common, the number of shares of First
          Michigan Common purchasable upon exercise hereof at the opening of
          business on the day following the day upon which such subdivision
          becomes effective shall be proportionately increased, and, conversely,
          in the event that, after the date hereof, outstanding shares of First
          Michigan Common are combined into a smaller number of shares of First
          Michigan Common, the number of shares of First Michigan Common
          purchasable upon exercise hereof at the opening of business on the day
          following the day upon which such combination becomes effective shall
          be proportionately decreased, such increase or decrease, as the case
          may be, to become effective immediately after the opening of business
          on the day following the day upon which such subdivision or
          combination becomes effective.

                    (iii) The reclassification (including any reclassification
          upon a merger in which First Michigan is the continuing corporation)
          of First Michigan Common into securities including other than First
          Michigan Common shall be deemed to involve a subdivision or
          combination, as the case may be, of the number of shares of First
          Michigan Common outstanding immediately prior to such reclassification
          into the number of shares of First Michigan Common outstanding
          immediately thereafter and the effective date of such reclassification
          shall be deemed to be the day upon which such subdivision or
          combination becomes effective, as the case may be, within the meaning
          of clause (ii) above.

                  (c) Whenever the number of shares of First Michigan Common
purchasable upon exercise hereof is adjusted pursuant to paragraph (b) above,
the Exercise Price shall be adjusted by multiplying the Exercise Price by a
fraction the numerator of which is equal to the number of shares of First
Michigan Common purchasable prior to the adjustment and the denominator of which
is equal to the number of shares of First Michigan Common purchasable after the
adjustment; provided, however, that no such adjustment of the Exercise Price
shall be made with respect to the

                                      - 7 -


<PAGE>   74



adjustment in the number of shares purchasable upon exercise hereof to be made
pursuant to paragraph (b) above upon the issuance of the First Michigan 1997
Stock Dividend.

                  (d) For the purpose of this Section 7, the term "First
Michigan Common" shall include any shares of First Michigan of any class or
series which has no preference or priority in the payment of dividends or in the
distribution of assets upon any voluntary or involuntary liquidation,
dissolution, or winding up of First Michigan and which is not subject to
redemption by First Michigan.

         SECTION 8.  NOTICE.

                  (a) Whenever the number of shares of First Michigan Common for
which this Warrant is exercisable is adjusted as provided in Section 7 hereof,
First Michigan shall promptly compute such adjustment and mail to the Holder a
certificate, signed by a principal financial officer of First Michigan, setting
forth the number of shares of First Michigan Common for which this Warrant is
exercisable and the adjusted Exercise Price as a result of such adjustment, a
brief statement of the facts requiring such adjustment, the computation thereof,
and when such adjustment will become effective.

                  (b) Upon the occurrence of a Triggering Event First Michigan
shall (i) promptly notify the Holder and/or the "Owner" (as that term is defined
in the Warrant Purchase Agreement) of such event, (ii) promptly compute the
"Warrant Repurchase Price" and the "Warrant Stock Repurchase Price" (as such
terms are defined in the Warrant Purchase Agreement), and (iii) furnish to the
Holder and/or the Owner a certificate, signed by the chief financial officer of
First Michigan setting forth the Warrant Repurchase Price and/or the Warrant
Stock Repurchase Price and the basis and computation thereof.

                  (c) Upon the occurrence of an event which results in this
Warrant becoming convertible into, or exchangeable for, the Substitute Warrant,
as provided in Section 5 hereof, First Michigan and the Acquiring Corporation
shall promptly notify the Holder of such event; and, upon receipt from the
Holder of its choice as to the issuer of the Substitute Warrant, the Acquiring
Corporation shall promptly compute the number of shares of Substitute Common for
which the Substitute Warrant is exercisable and furnish to the Holder a
certificate, signed by a principal financial officer of the Acquiring
Corporation, setting forth the number of shares of Substitute Common for which
the Substitute Warrant is exercisable, the Substitute Warrant exercise price, a
computation thereof, and when such adjustment will become effective.

         SECTION 9. TERMINATION. This Warrant and the rights conferred hereby
shall terminate upon the earliest of (i) six months after the occurrence of a
Triggering Event; (ii) the Effective Date of the Merger, (iii) the date of
termination of the Merger Documents unless the event giving rise to the right to
terminate is preceded by a Triggering Event or the receipt by First Michigan, or
the

                                      - 8 -


<PAGE>   75


announcement by another person, of a proposal involving an Acquisition
Transaction or Tender Offer; or (iv) May 31, 1999.

         IN WITNESS WHEREOF, the undersigned has executed this Warrant as of
this _____ day of May, 1997.

ATTEST:                                    FIRST MICHIGAN BANK CORPORATION

By:                                        By:
- ----------------------------                  ---------------------------------
                                                David M. Ondersma, Chairman and
Title:                                          Chief Executive Officer
      ----------------------


                                      - 9 -


<PAGE>   76
                                             EXHIBIT 2 TO SUPPLEMENTAL AGREEMENT

    MATTERS AS TO WHICH VARNUM, RIDDERING, SCHMIDT & HOWLETT LLP SHALL OPINE
    ------------------------------------------------------------------------

         1. First Michigan is a corporation duly organized, validly existing,
and in good standing under the laws of the State of Michigan with full corporate
power and authority to carry on the business in which it is engaged as described
in the First Michigan Proxy Statement and to own and use its material Assets.

         2. Each of the First Michigan Subsidiaries is duly organized, validly
existing, and in good standing under the Laws of the United States or its state
of incorporation, with full corporate power and authority to carry on the
business in which it is engaged as described in the First Michigan Proxy
Statement and to own and use its material Assets.

         3. The execution and delivery of the Merger Documents and compliance
with their respective terms by First Michigan do not and will not violate or
contravene any provision of the Articles of Incorporation or Bylaws of First
Michigan nor, to our knowledge but without any independent investigation, any
Law, Order, Permit or Contract to which First Michigan is a party or by which
First Michigan or any of its material Assets is bound.

         4. The Merger Documents have been duly and validly executed and
delivered by First Michigan and assuming valid authorization, execution and
delivery by Huntington, constitute the valid and binding agreements of First
Michigan enforceable in accordance with their respective terms, except as
enforceability may be limited by bankruptcy, insolvency, reorganization, or
similar laws affecting creditors' rights generally, provided, however, that we
express no opinion as to the availability of the equitable remedy of specific
performance.

         5. First Michigan has the corporate power and authority to own its
properties and assets and to carry on its business within the State of Michigan.
To our Knowledge, First Michigan is not required to be qualified to do business
in any jurisdiction other than Michigan.

         6. All corporate actions required to be taken by the directors and
shareholders of First Michigan to authorize the Merger Documents and the
transactions contemplated thereby have been taken.

         7. All eligible accounts of deposit in all First Michigan Subsidiaries
that are depository institutions are insured by the Federal Deposit Insurance
Corporation to the fullest extent permitted by Law.

         8. The Merger shall be exempted from the requirements of Section 780 
of Chapter 7A of the Michigan Business Corporation Act, as amended.

         9. The execution and delivery of the Merger Documents does not, and the
consummation of the Merger and the other transactions contemplated by the Merger
Documents will not (i) result in the grant of any Rights to any Person under the
First Michigan Rights Agreement, (ii) result in separation from the shares of
First Michigan Common of the Rights granted under the


<PAGE>   77



First Michigan Rights Agreement, (iii) permit any holder of any of the Rights
under the First Michigan Rights Agreement to exercise any such Rights, or (iv)
give any Person any Right to purchase any securities issued by Huntington,
including, without limitation, any Rights as a result of a "Flip-over
Transaction or Event" under Section 3.2 of the First Michigan Rights Agreement.
First Michigan and FMB-First Michigan Bank and FMB-Trust, as Rights Agents, have
properly authorized and executed a certain Amendment to Shareholder Protection
Rights Agreement, dated May 5, 1997, a copy of which has been furnished to
Huntington.



                                      - 2 -


<PAGE>   78


                                             EXHIBIT 3 TO SUPPLEMENTAL AGREEMENT

         MATTERS AS TO WHICH PORTER, WRIGHT, MORRIS & ARTHUR SHALL OPINE
         ---------------------------------------------------------------

         1. Huntington is a corporation duly organized, validly existing and in
good standing under the laws of the State of Maryland with full corporate power
and authority to carry on the business in which it is engaged as described in
the Huntington Proxy Statement and to own and use its material Assets.

         2. The execution and delivery of the Merger Documents and compliance
with their respective terms by Huntington do not and will not violate or
contravene any provision of the Articles of Incorporation or Bylaws of
Huntington or, to our knowledge but without any independent investigation, any
Law, Order, or Permit to which Huntington is a party or by which Huntington is
bound.

         3. The Merger Documents have been duly and validly executed and
delivered by Huntington and, assuming valid authorization, execution and
delivery by First Michigan, constitute the valid and binding agreements of
Huntington enforceable in accordance with their respective terms, except as
enforceability may be limited by bankruptcy, insolvency, reorganization, or
similar laws affecting creditors' rights generally, provided, however, that we
express no opinion as to the availability of the equitable remedy of specific
performance.

         4. The shares of Huntington Common to be issued to the shareholders of
First Michigan as contemplated by the Merger Documents have been registered
under the Securities Act of 1933, as amended, and when properly issued and
delivered following consummation of the Merger will be duly authorized, validly
issued, fully paid and non-assessable under the Maryland Business Corporation
Act.

<PAGE>   1
                                                                    EXHIBIT 2(c)

                           WARRANT PURCHASE AGREEMENT
                           --------------------------


         THIS WARRANT PURCHASE AGREEMENT (this "Agreement") is made as of May 5,
1997, between HUNTINGTON BANCSHARES INCORPORATED, a Maryland corporation
("Huntington"), and FIRST MICHIGAN BANK CORPORATION, a Michigan corporation
("First Michigan").

                                    RECITALS:
                                    --------

         A. Concurrently herewith, Huntington and First Michigan have entered
into (i) a certain Agreement and Plan of Merger, dated as of the date hereof
(the "Merger Agreement"), which provides for the merger of First Michigan into
Huntington (the "Merger"), and (ii) a certain Supplemental Agreement, dated as
of the date hereof, which contains certain additional terms and conditions
relating to the Merger (the "Supplemental Agreement"). (The Merger Agreement and
the Supplemental Agreement are sometimes hereinafter collectively referred to as
the "Merger Documents.") All capitalized terms used herein and not otherwise
defined herein shall have the meanings ascribed to them in the Merger Documents.

         B. As a condition to Huntington's entering into the Merger Agreement
and the Supplemental Agreement, and in consideration therefor, First Michigan
has agreed to issue to Huntington a warrant or warrants entitling Huntington to
purchase up to a total of 5,268,716 shares of First Michigan Common, on the
terms and conditions set forth herein.

                                   AGREEMENT:
                                   ---------

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

         SECTION 1. ISSUANCE, DELIVERY, AND EXERCISE OF THE WARRANT.
Concurrently with the execution of the Merger Documents and this Agreement,
First Michigan shall execute a warrant in favor of Huntington in the form
attached as Attachment A hereto (the "Warrant") to purchase up to a total of
5,268,716 shares of First Michigan Common at a purchase price equal to $29.275
per share (the "Exercise Price"), subject to adjustments as provided in the
Warrant. (The holder of the Warrant from time to time is hereinafter referred to
as the "Holder.") The Warrant shall be exercisable in accordance with the terms
and conditions set forth therein.

         SECTION 2. REGISTRATION RIGHTS. If, at any time after the Warrant
becomes exercisable in accordance with its terms, First Michigan shall receive a
written request therefor from the Holder, First Michigan shall prepare and file
a registration statement under the 1933 Act covering such number of shares of
First Michigan Common as the Holder shall specify in the request and shall use
its best efforts to cause such registration statement to become effective;
provided, however, that the


<PAGE>   2



Holder shall only have the right to request three such registrations. Without
the written consent of the Holder, neither First Michigan nor any other holder
of securities of First Michigan may include any other securities in such
registration.

         SECTION 3. "PIGGYBACK" RIGHTS. If, at any time after the Warrant
becomes exercisable in accordance with its terms, First Michigan shall determine
to proceed with the preparation and filing of a registration statement under the
1933 Act in connection with the proposed offer and sale for money of any of its
securities (other than in connection with a dividend reinvestment, employee
stock purchase, stock option, or similar plan or a registration statement on
Form S-4) by it or any of its security holders, First Michigan shall give
written notice thereof to the Holder. Upon the written request of the Holder
given within ten days after receipt of any such notice from First Michigan,
First Michigan shall, except as herein provided, cause all shares of First
Michigan Common which the Holder shall request be included in such registration
statement to be so included; provided, however, that nothing herein shall
prevent First Michigan from abandoning or delaying any registration at any time;
and provided, further, that if First Michigan decides not to proceed with a
registration after the registration statement has been filed with the SEC and
First Michigan's decision not to proceed is primarily based upon the anticipated
public offering price of the securities to be sold by First Michigan, First
Michigan shall promptly complete the registration for the benefit of the Holder
if the Holder agrees to bear all additional and incremental expenses incurred by
First Michigan as the result of such registration after First Michigan has
decided not to proceed. If any registration pursuant to this Section shall be
underwritten in whole or in part, the Holder may require that any shares of
First Michigan Common requested for inclusion pursuant to this Section be
included in the underwriting on the same terms and conditions as the securities
otherwise being sold through the underwriters. In the event that the shares of
First Michigan Common requested for inclusion pursuant to this Section would
constitute more than 25 percent of the total number of shares to be included in
a proposed underwritten public offering, and if in the good faith judgment of
the managing underwriter of such public offering the inclusion of all of such
shares would interfere with the successful marketing of the shares of being
offered by First Michigan, the number of shares otherwise to be included in the
underwritten public offering hereunder may be reduced; provided, however, that
after any such required reduction, the shares of First Michigan Common to be
included in such offering for the account of the Holder shall constitute at
least 25 percent of the total number of shares to be included in such offering.

         SECTION 4. OBLIGATIONS OF FIRST MICHIGAN IN CONNECTION WITH A
REGISTRATION. If and whenever First Michigan is required by the provisions of
Sections 2 or 3 hereof to effect the registration of any shares of First
Michigan Common under the 1933 Act, First Michigan shall:

                  (a) prepare and file with the SEC a registration statement
with respect to such securities and use its best efforts to cause such
registration statement to become and remain effective for such period as may be
reasonably necessary to effect the sale of such securities, not to exceed nine
months;

                  (b) prepare and file with the SEC such amendments to such
registration statement and supplements to the prospectus contained therein as
may be necessary to keep such registration statement effective for such period
as may be reasonably necessary to effect the sale of such securities, not to
exceed nine months;


<PAGE>   3



                  (c) furnish to the Holder and to the underwriters of the
securities being registered such reasonable number of copies of the registration
statement, amendments thereto, preliminary prospectus, final prospectus, and
such other documents as the Holder or such underwriters may reasonably request
in order to facilitate the public offering of such securities;

                  (d) use its best efforts to register or qualify the securities
covered by such registration statement under such state securities or blue sky
laws of such jurisdictions as the Holder or such underwriters may reasonably
request; provided that First Michigan shall not be required by virtue hereof to
submit to the general jurisdiction of any state;

                  (e) notify the Holder, promptly after First Michigan shall
receive notice thereof, of the time when such registration statement or any
post-effective amendment thereof has become effective or a supplement to any
prospectus forming a part of such registration statement has been filed;

                  (f) notify the Holder promptly of any request by the SEC for 
the amending or supplementing of such registration statement or prospectus or
for additional information;

                  (g) prepare and file with the SEC, promptly upon the request
of the Holder, any amendments or supplements to such registration statement or
prospectus which, in the opinion of counsel for the Holder (and concurred in by
counsel for First Michigan), is required under the 1933 Act or the rules and
regulations promulgated thereunder in connection with the distribution of the
shares of First Michigan Common by the Holder;

                  (h) prepare and promptly file with the SEC such amendment or
supplement to such registration statement or prospectus as may be necessary to
correct any statements or omissions if, at the time when a prospectus is
required to be delivered under the 1933 Act, any event shall have occurred as
the result of which such prospectus as then in effect would include an untrue
statement of a material fact or omit to state any material fact necessary to
make the statements therein, in the light of the circumstances in which they
were made, not misleading;

                  (i) advise the Holder, promptly after it shall receive notice
or obtain knowledge thereof, of the issuance of any stop order by the SEC
suspending the effectiveness of such registration statement or the initiation or
threatening of any proceeding for that purpose and promptly use its best efforts
to prevent the issuance of any stop order or to obtain its withdrawal if such
stop order should be issued; and

                  (j) at the request of the Holder, furnish on the date or dates
provided for in the underwriting agreement: (i) an opinion or opinions of the
counsel representing First Michigan for the purposes of such registration,
addressed to the underwriters and to the Holder, covering such matters as such
underwriters and the Holder may reasonably request and as are customarily
covered by issuer's counsel at that time; and (ii) a letter or letters from the
independent certified public accountants of First Michigan, addressed to the
underwriters and to the Holder, covering such matters as such underwriters or
the Holder may reasonably request, in which letters such accountants shall state
(without limiting the generality of the foregoing) that they are independent
certified public accountants within the meaning of the 1933 Act and that, in the
opinion of such accountants, the financial statements and other financial data
of First Michigan included in the registration statement


<PAGE>   4



or any amendment or supplement thereto comply in all material respects with the
applicable accounting requirements of the 1933 Act.

         SECTION 5. EXPENSES OF REGISTRATION. With respect to a registration
requested pursuant to Section 2 hereof and with respect to each inclusion of
shares of First Michigan Common in a registration statement pursuant to Section
3 hereof, First Michigan shall bear the following fees, costs, and expenses: all
registration, stock exchange listing, and NASD fees, printing expenses, fees and
disbursements of counsel and accountants for First Michigan, fees and
disbursements of counsel for the underwriter or underwriters of such securities
(if First Michigan and/or the Holder are required to bear such fees and
disbursements), and all legal fees and disbursements and other expenses of
complying with state securities or blue sky laws of any jurisdictions in which
the securities to be offered are to be registered or qualified. Fees and
disbursements of counsel and accountants for the Holder, underwriting discounts
and commissions and transfer taxes relating to the First Michigan Common being
sold for the Holder, and any other expenses incurred by the Holder not expressly
included above shall be borne by the Holder.

         SECTION 6. INDEMNIFICATION.

                  (a) First Michigan shall indemnify and hold harmless the
Holder, any underwriter (as defined in the 1933 Act) for the Holder, and each
person, if any, who controls the Holder or such underwriter within the meaning
of the 1933 Act, from and against any and all loss, damage, liability, cost, and
expense to which the Holder or any such underwriter or controlling person may
become subject under the 1933 Act or otherwise, insofar as such losses, damages,
liabilities, costs, or expenses are caused by any untrue statement or alleged
untrue statement of any material fact contained in any registration statement
filed pursuant to Section 4 hereof, any prospectus or preliminary prospectus
contained therein, or any amendment or supplement thereto, or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances in which they are made, not misleading; provided,
however, that First Michigan will not be liable in any such case to the extent
that any such loss, damage, liability, cost, or expense arises out of or is
based upon an untrue statement or alleged untrue statement or omission or
alleged omission so made in conformity with information furnished by the Holder,
such underwriter, or such controlling persons in writing specifically for use in
the preparation thereof.

                  (b) Promptly after receipt by an indemnified party pursuant to
the provisions of paragraph (a) of this Section 6 of notice of the commencement
of any action involving the subject matter of the foregoing indemnity
provisions, such indemnified party shall, if a claim thereof is to be made
against First Michigan pursuant to the provision of such paragraph (a), promptly
notify First Michigan of the commencement thereof; but the omission to so notify
First Michigan will not relieve it from any liability which it may have to any
indemnified party otherwise hereunder. In case such action is brought against
any indemnified party and such indemnified party notifies First Michigan of the
commencement thereof, First Michigan shall have the right to participate in and,
to the extent that it may wish to do so, to assume the defense thereof, with
counsel satisfactory to such indemnified party; provided, however, if the
defendants in any action include both the indemnified party and First Michigan
and there is a conflict of interest which would prevent counsel for First
Michigan from also representing the indemnified party, the indemnified party or
parties shall have the right to select one separate counsel to participate in
the defense of such action on behalf of such


<PAGE>   5



indemnified party or parties. After notice from First Michigan to such
indemnified party of its election so to assume the defense of any such action,
the indemnified party shall have the right to participate in such action and to
retain its own counsel, but First Michigan shall not be required to indemnify
and hold harmless the indemnified party pursuant to the provisions of such
paragraph (a) for any legal fees or other expenses subsequently incurred by such
indemnified party in connection with the defense thereof, other than reasonable
costs of investigation, unless (i) the indemnified party shall have employed
separate counsel in accordance with the provisions of the preceding sentence of
this paragraph (b), (ii) First Michigan shall not have employed counsel
satisfactory to the indemnified party to represent the indemnified party within
a reasonable time after the notice of the commencement of the action, or (iii)
First Michigan has authorized the employment of counsel for the indemnified
party at the expense of First Michigan.

                  (c) If recovery is not available under the foregoing
indemnification provisions, for any reason other than as specified therein, the
parties entitled to indemnification by the terms thereof shall be entitled to
contribution to liabilities and expenses, except to the extent that contribution
is not permitted under Section 11(f) of the 1933 Act. In determining the amount
of contribution to which the respective parties are entitled, there shall be
considered the parties' relative knowledge and access to information concerning
the matter with respect to which the claim was asserted, the opportunity to
correct and prevent any statement or omission, and any other equitable
considerations appropriate under the circumstances.

         SECTION 7.  REPURCHASE RIGHTS.

                  (a) At any time after the Warrant becomes exercisable and
prior to the expiration of the Warrant, in accordance with the terms thereof:

                      (i) First Michigan may, and upon the written request of 
     the Holder, First Michigan shall, repurchase the Warrant from the Holder
     at a price (the "Warrant Repurchase Price") equal to the difference
     between the "Market/Offer Price" (as defined in paragraph (b) below) and
     the Exercise Price, multiplied by the number of shares for which the
     Warrant may then be exercised, in the aggregate, but only if the
     Market/Offer Price is greater than the Exercise Price; and

                      (ii) First Michigan may, and upon the written request of
     the owner (the "Owner") of any shares of First Michigan Common purchased
     pursuant to an exercise of the Warrant ("Warrant Stock"), First Michigan
     shall, repurchase all of the shares of Warrant Stock held by such
     Owner at a price (the "Warrant Stock Repurchase Price") equal to the
     number of shares to be repurchased hereunder multiplied by the greater of
     the Exercise Price and the Market/Offer Price.

                  (b) For purposes of paragraph (a) of this Section 7, the
"Market/Offer Price" shall mean the highest of (i) the price per share at which
a tender offer or exchange offer for shares of First Michigan Common has been
made, (ii) the price per share of First Michigan Common to be paid by any third
party pursuant to an agreement with First Michigan, and (iii) the highest
closing price for shares of First Michigan Common within the 4-month period
immediately preceding the date the Holder gives notice of the required
repurchase of the Warrant or the Owner gives notice of the required repurchase
of Warrant Stock, as appropriate. In the event that an exchange offer is made


<PAGE>   6



or an agreement is entered into for a merger or consolidation involving
consideration other than cash, the value of the securities or other property
issuable or deliverable in exchange for First Michigan Common shall be
determined by a nationally recognized investment banking firm mutually
acceptable to the parties hereto.

                  (c) The Holder and the Owner may exercise their respective
rights to require First Michigan to repurchase the Warrant or the Warrant Stock
pursuant to this Section 7 by surrendering for such purpose to First Michigan,
at its principal office, the Warrant or certificates for shares of Warrant
Stock, as the case may be, free and clear of any liens, claims, encumbrances, or
rights of third parties of any kind, accompanied by a written notice or notices
stating that the Holder or the Owner, as the case may be, requests First
Michigan to repurchase such Warrant or Warrant Stock in accordance with the
provisions of this Section 7. Subject to the last proviso of paragraph 7(d)
below, as promptly as practicable, and in any event within five business days
after the surrender of the Warrant or certificates representing shares of
Warrant Stock and the receipt of such notice or notices relating thereto, First
Michigan shall deliver or cause to be delivered to the Holder or Owner the
Warrant Repurchase Price or the Warrant Stock Repurchase Price therefor, as
applicable, or the portion thereof which First Michigan is not then prohibited
under applicable law and regulation from so delivering.

                  (d) To the extent that First Michigan is prohibited under
applicable law or regulation, or as a result of administrative or judicial
action, from repurchasing the Warrant and/or the Warrant Stock in full at any
time that it may be required to do so hereunder, First Michigan shall
immediately so notify the Holder and/or the Owner and thereafter deliver or
cause to be delivered, from time to time, to the Holder and/or the Owner, as
appropriate, the portion of the Warrant Repurchase Price and the Warrant Stock
Repurchase Price, respectively, which it is no longer prohibited from
delivering, within five business days after the date on which First Michigan is
no longer so prohibited. Upon receipt of such notice from First Michigan and for
a period of 15 days thereafter, the Holder and/or Owner may revoke its notice of
repurchase of the Warrant and/or Warrant Stock by written notice to First
Michigan at its principal office stating that the Holder and/or the Owner elects
to revoke its election to exercise its right to require First Michigan to
repurchase the Warrant and/or Warrant Stock, whereupon First Michigan will
promptly deliver to the Holder and/or Owner the Warrant and/or certificates
representing shares of Warrant Stock surrendered to First Michigan for purposes
of such repurchase. Whether or not such election is revoked, First Michigan
hereby agrees to use its best efforts to obtain all required legal and
regulatory approvals necessary to permit First Michigan to repurchase the
Warrant and/or the Warrant Stock as promptly as practicable.

         SECTION 8. ASSUMPTION OF OBLIGATIONS UNDER THIS AGREEMENT. First
Michigan will not enter into any transaction described in paragraph 5(a) of the
Warrant unless the "Acquiring Corporation" (as that term is defined in the
Warrant) assumes in writing all the obligations of First Michigan hereunder.

         SECTION 9. REMEDIES. Without limiting the foregoing or any remedies
available to the Holder, First Michigan specifically acknowledges that neither
Huntington nor any successor holder of the Warrant would have an adequate remedy
at law for any breach of this Warrant Purchase Agreement and First Michigan
hereby agrees that Huntington and any successor holder of the


<PAGE>   7


Warrant shall be entitled to specific performance of the obligations of First
Michigan hereunder and injunctive relief against actual or threatened violations
of the provisions hereof.

         SECTION 10.  TERMINATION. This Agreement will terminate upon a 
termination of the Warrant in accordance with Section 9 thereof.

         In Witness Whereof, the parties hereto have executed this Warrant
Purchase Agreement as of the day and year first above written.

                               

                               
                     HUNTINGTON BANCSHARES INCORPORATED

                     By:    /s/ Frank Wobst
                        ---------------------------------------------------
                          Frank Wobst, Chairman and Chief Executive Officer

                     FIRST MICHIGAN BANK CORPORATION

                     By:    /s/ David M. Ondersma
                        --------------------------------------------------
                          David M. Ondersma, Chairman and Chief Executive
                          Officer
<PAGE>   8
                                    ATTACHMENT A TO WARRANT PURCHASE AGREEMENT

THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR REGISTERED OR
QUALIFIED UNDER ANY STATE SECURITIES LAWS, AND MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED WITHOUT BEING SO REGISTERED OR QUALIFIED UNLESS AN EXEMPTION OR
EXEMPTIONS FROM SUCH REGISTRATION OR QUALIFICATION REQUIREMENTS ARE AVAILABLE.

                                     WARRANT
                                     -------

                       TO PURCHASE 5,268,716 COMMON SHARES

                                       OF

                         FIRST MICHIGAN BANK CORPORATION

       This is to certify that, for value received, HUNTINGTON BANCSHARES
INCORPORATED, a Maryland corporation ("Huntington"), is entitled to purchase
from FIRST MICHIGAN BANK CORPORATION, a Michigan corporation ("First Michigan"),
at any time on or after the date hereof, an aggregate of up to 5,268,716 common
shares, $1.00 par value per share, of First Michigan ("First Michigan Common"),
at a price of $29.275 per share (the "Exercise Price"), subject to the terms and
conditions of this Warrant and a certain Warrant Purchase Agreement, of even
date herewith, between Huntington and First Michigan (the "Warrant Purchase
Agreement"). The number of shares of First Michigan Common which may be received
upon the exercise of this Warrant and the Exercise Price are subject to
adjustment from time to time as hereinafter set forth. The terms and conditions
set forth in this Warrant and the Warrant Purchase Agreement shall be binding
upon the respective successors and assigns of both of the parties hereto. This
Warrant is issued in connection with a certain Agreement and Plan of Merger,
dated as of the date hereof, between Huntington and First Michigan (the "Merger
Agreement"), which provides for the merger of First Michigan into Huntington
(the "Merger"), and a certain Supplemental Agreement between Huntington and
First Michigan, which provides certain additional terms and conditions relating
to the Merger (the "Supplemental Agreement"). The Merger Agreement and the
Supplemental Agreement are sometimes hereinafter collectively referred to as the
"Merger Documents." All capitalized terms used herein and not otherwise defined
herein shall have the meanings ascribed to them in the Merger Documents. The
term "Holder" shall mean and refer to Huntington or any successor holder of this
Warrant.

         SECTION 1.  EXERCISE OF THE WARRANT.

                  (a) The Holder will not exercise this Warrant unless it has
obtained all required approvals, if any, of appropriate regulatory authorities
having jurisdiction, including the Federal Reserve Board, pursuant to all
applicable laws and regulations. Further, subject to the terms and conditions
set forth in this Warrant and in the Warrant Purchase Agreement and the
provisions of



<PAGE>   9



applicable law, the Holder will not exercise this Warrant without the written
consent of First Michigan except upon the occurrence of any of the following
events (a "Triggering Event"):

                  (i)      any material, willful, and intentional breach
                           of the Merger Documents by First Michigan that would
                           permit Huntington to terminate the Merger Documents
                           (A) occurring after the receipt by First Michigan of
                           a proposal to engage in an Acquisition Transaction,
                           (B) occurring after the announcement by any other
                           Person of an intention to engage in an Acquisition
                           Transaction, or (C) in anticipation and for the
                           purpose of engaging in an Acquisition Transaction;

                  (ii)     (A) a proposal to engage in an Acquisition
                           Transaction is submitted to and approved by the
                           shareholders of First Michigan at any time
                           prior to May 31, 1999, or (B) a Tender Offer is
                           commenced and the transactions contemplated in the
                           Tender Offer are completed in such a manner that the
                           Person making the Tender Offer acquires beneficial
                           ownership of more than 20 percent of the capital
                           stock or any other class of voting securities of
                           First Michigan, and the Merger is not consummated
                           prior to May 31, 1999;

                  (iii)    (A) a proposal to engage in an Acquisition
                           Transaction is received by First Michigan or a
                           Tender Offer is made directly to the shareholders of
                           First Michigan or the intention of making an
                           Acquisition Transaction or Tender Offer is   
                           announced at any time prior to the holding of the
                           First Michigan Shareholders' Meeting; (B) the Board
                           of Directors of First Michigan (1) fails to
                           recommend to the shareholders of First Michigan that
                           they vote their shares of First Michigan Common in
                           favor of the approval of the Merger, (2) withdraws
                           such recommendation previously made, (3) fails to
                           solicit proxies of shareholders of First Michigan to
                           approve the Merger, or (4) fails to hold the First
                           Michigan Shareholders' Meeting; and (C) the Merger
                           is not consummated by May 31, 1999; 

                  (b) Notwithstanding the foregoing, this Warrant shall not be
exercisable in the event of the failure to consummate the Merger solely as a
result of any of the following: (i) the failure of the shareholders of
Huntington to approve the Merger; (ii) the failure of any Regulatory Authority
to provide any required Consent to the Merger, which failure was not the result
of the existence of the Acquisition Proposal or a breach by First Michigan of
any of its obligations under any of the Merger Documents; or (iii) the Merger
Documents are terminated pursuant to Section 9.1 of the Supplemental Agreement,
unless the event giving rise to the right to terminate is preceded by

                                      - 2 -


<PAGE>   10



a Triggering Event or the receipt by First Michigan of an Acquisition
Transaction proposal, or the announcement by another Person of a proposal
involving an Acquisition Transaction.

                  (c) An "Acquisition Transaction" shall mean a transaction
involving (A) the sale or other disposition of more than 20 percent of the
shares of the capital stock or any other class of voting securities of First
Michigan, including, but not limited to, a Tender Offer, (B) the sale or other
disposition of 15 percent or more of the consolidated assets or deposits of
First Michigan or of the banks owned by First Michigan, in the aggregate, or (C)
a merger or consolidation involving First Michigan other than a transaction
pursuant to which First Michigan will be the surviving corporation and the
current shareholders of First Michigan will be the owners of a majority of the
stock of the surviving corporation following the transaction. As used in this
Section 1, "person" or "group of persons" shall have the meanings assigned to
such terms by Section 13(d) of the 1934 Act. For purposes of this Section 1, a
Tender Offer which is contingent upon the expiration of the Warrant is deemed to
commence when it is announced.

                  (d) This Warrant shall be exercised by presentation and
surrender hereof to First Michigan at its principal office accompanied by (i) a
written notice of exercise for a specified number of shares of First Michigan
Common, (ii) payment to First Michigan, for the account of First Michigan, of
the Exercise Price for the number of shares specified in such notice, and (iii)
a certificate of the Holder indicating the Triggering Event that has occurred
which entitles the Holder to exercise this Warrant. The Exercise Price for the
number of shares of First Michigan Common specified in the notice shall be
payable in immediately available funds.

                  (e) Upon such presentation and surrender, First Michigan shall
issue promptly (and within three business days if requested by the Holder) to
the Holder, or any assignee, transferee, or designee permitted by subparagraph
(g) of this Section 1, the shares to which the Holder is entitled hereunder.

                  (f) If this Warrant should be exercised in part only, First
Michigan shall, upon surrender of this Warrant for cancellation, execute and
deliver a new Warrant evidencing the rights of the Holder thereof to purchase
the balance of the shares purchasable hereunder. Upon receipt by First Michigan
of this Warrant, in proper form for exercise, the Holder shall be deemed to be
the holder of record of the shares of First Michigan Common issuable upon such
exercise, notwithstanding that the stock transfer books of First Michigan shall
then be closed or that certificates representing such shares of First Michigan
Common shall not then be actually delivered to the Holder. First Michigan shall
pay all expenses, and any and all federal, state, and local taxes and other
charges that may be payable in connection with the preparation, issue, and
delivery of stock certificates under this Section 1 in the name of the Holder or
of any assignee, transferee, or designee permitted by subparagraph (g) of this
Section 1.

                  (g) This Warrant, once exercisable, or any warrant shares
acquired by the Holder by its exercise, may be sold or transferred in whole or
in part to any person, subject to the receipt by such person of approvals of
appropriate regulatory authorities having jurisdiction, including the Federal
Reserve Board, pursuant to all applicable laws and regulations, to the extent
required.

                                      - 3 -


<PAGE>   11



         SECTION 2. CERTAIN COVENANTS AND REPRESENTATIONS OF FIRST MICHIGAN.

                  (a) First Michigan shall at all times maintain sufficient
authorized but unissued shares of First Michigan Common so that this Warrant may
be exercised without additional authorization of the holders of First Michigan
Common, after giving effect to all other options, warrants, convertible
securities, and other rights to purchase First Michigan Common.

                  (b) First Michigan represents and warrants to the Holder that
the shares of First Michigan Common issued upon an exercise of this Warrant will
be duly authorized, fully paid, non-assessable, and subject to no preemptive
rights.

                  (c) First Michigan agrees (i) that it will not, by charter
amendment or through reorganization, consolidation, merger, dissolution or sale
of assets, or by any other voluntary act, avoid or seek to avoid the observance
or performance of any of the covenants, stipulations, or conditions to be
observed or performed hereunder by First Michigan; (ii) promptly to take all
action as may from time to time be required, including, without limitation (A)
complying with all pre- merger notification, reporting, and waiting period
requirements specified in 15 U.S.C. ss.18a and regulations promulgated
thereunder, and (B) in the event, under the Bank Holding Company Act of 1956, as
amended (the "Bank Holding Company Act"), or the Change in Bank Control Act of
1978, or other statute, the prior approval of the Federal Reserve Board or other
regulatory agency (collectively, the "Agencies"), is necessary before the
Warrant may be exercised or transferred, cooperate fully with the Holder in
preparing such applications and providing such information to the Agencies as
the Agencies may require in order to permit the Holder to exercise or transfer
this Warrant and First Michigan duly and effectively to issue shares pursuant to
the exercise hereof; and (iii) promptly to take all action provided herein to
protect the rights of the Holder against dilution.

         SECTION 3. FRACTIONAL SHARES. First Michigan shall not be required to
issue fractional shares of First Michigan Common upon an exercise of this
Warrant but shall pay for such fraction of a share in cash or by certified or
official bank check at the Exercise Price.

         SECTION 4. EXCHANGE OR LOSS OF WARRANT. This Warrant is exchangeable,
without expense, at the option of the Holder, upon presentation and surrender
hereof at the principal office of First Michigan for other Warrants of different
denominations entitling the Holder thereof to purchase in the aggregate the same
number of shares of First Michigan Common purchasable hereunder. The term
"Warrant" as used herein includes any warrants for which this Warrant may be
exchanged. Upon receipt by First Michigan of evidence reasonably satisfactory to
it of the loss, theft, destruction, or mutilation of this Warrant, and (in the
case of loss, theft, or destruction) of reasonably satisfactory indemnification,
and upon surrender and cancellation of this Warrant, if mutilated, First
Michigan will execute and deliver a new Warrant of like tenor and date. Any such
new Warrant executed and delivered shall constitute an additional contractual
obligation on the part of First Michigan, whether or not the Warrant so lost,
stolen, destroyed, or mutilated shall at any time be enforceable by anyone.

                                      - 4 -


<PAGE>   12



         SECTION 5.  CERTAIN TRANSACTIONS.

                  (a) In case First Michigan shall (i) consolidate with or merge
into any Person, other than Huntington or one of its Affiliates, and shall not
be the continuing or surviving corporation of such consolidation or merger, (ii)
permit any Person, other than Huntington or one of its Affiliates, to merge into
First Michigan and First Michigan shall be the continuing or surviving
corporation, but, in connection with such merger, the then outstanding shares of
First Michigan Common shall be changed into or exchanged for stock or other
securities of any other Person or cash or any other property, or (iii) sell or
otherwise transfer all or substantially all of its assets to any Person, other
than Huntington or one of its Affiliates, then, and in any such case, the
agreement governing such transaction shall make proper provision so that this
Warrant shall, upon the consummation of any such transaction and upon the terms
and conditions set forth herein, be converted into, or exchanged for, a warrant,
at the option of the Holder, of either (A) the Acquiring Corporation (as
hereinafter defined), (B) any company which controls the Acquiring Corporation,
or (C) in the case of a merger described in clause (a)(ii) above, First
Michigan, in which case such warrant shall be a newly issued warrant (in any
such case, the "Substitute Warrant").

                  (b) For purposes of this Section 5, the following terms have 
the meanings indicated:

                              (i) "Acquiring Corporation" shall mean (A) the
               continuing or surviving corporation of a consolidation or merger
               with First Michigan (if other than First Michigan), (B) the
               corporation merging into First Michigan in a merger in which
               First Michigan is the continuing or surviving person and in
               connection with which the then outstanding shares of First
               Michigan Common are changed into or exchanged for stock or other
               securities of any other Person or cash or any other property, or
               (C) the transferee of all or substantially all of First
               Michigan's assets;

                              (ii) "Substitute Common" shall mean the common
               stock issued by the issuer of the Substitute Warrant;

                              (iii) "Assigned Value" shall mean the Market/Offer
               Price as determined pursuant to paragraph 7(b) of the Warrant
               Purchase Agreement; provided, however, that in the event of a
               sale of all or substantially all of First Michigan's assets, the
               Assigned Value shall be the sum of the price paid in such sale
               for such assets and the current market value of the remaining
               assets of First Michigan as determined by a recognized investment
               banking firm selected by the Holder, divided by the number of
               shares of First Michigan Common outstanding at the time of such
               sale;

                              (iv) "Average Price" shall mean the average
               closing price of a share of Substitute Common for the one year
               immediately preceding the consolidation, merger, or sale in
               question, but in no event higher than the closing price of the
               shares of Substitute Common on the day preceding such
               consolidation, merger, or sale; provided that if First Michigan
               is the issuer of the Substitute

                                      - 5 -


<PAGE>   13



Warrant, the Average Price shall be computed with respect to a share of the
common stock issued by the Person merging into First Michigan or by any company
which controls such Person, as the Holder may elect;

                              (v) A "Person" shall mean any individual, firm,
               corporation or other entity and include as well any syndicate or
               group deemed to be a "person" by Section 13(d)(3) of the
               Securities Exchange Act of 1934, as amended; and

                              (vi) "Affiliate" shall have the meaning ascribed
               to such term in Rule 12b-2 of the General Rules and Regulations
               under the Securities Exchange Act of 1934, as amended.

                  (c) The Substitute Warrant shall have the same terms as this
Warrant, provided that, if the terms of the Substitute Warrant cannot, for legal
reasons, be the same as this Warrant, such terms shall be as similar as possible
and in no event less advantageous to the Holder. The issuer of the Substitute
Warrant shall also enter into an agreement with the then Holder of the
Substitute Warrant in substantially the same form as the Warrant Purchase
Agreement, which shall be applicable to the Substitute Warrant.

                  (d) The Substitute Warrant shall be exercisable for such
number of shares of Substitute Common as is equal to the Assigned Value
multiplied by the number of shares of First Michigan Common for which this
Warrant is then exercisable, divided by the Average Price. The exercise price of
the Substitute Warrant per share of Substitute Common shall be equal to the
Exercise Price multiplied by a fraction in which the numerator is the number of
shares of First Michigan Common for which this Warrant is then exercisable and
the denominator is the number of shares of Substitute Common for which the
Substitute Warrant is exercisable.

         SECTION 6.  RIGHTS OF THE HOLDER; REMEDIES.

                  (a) The Holder shall not, by virtue hereof and prior to the
exercise hereof, be entitled to any rights of a holder of First Michigan Common.

                  (b) Without limiting the foregoing or any remedies available
to the Holder, First Michigan specifically acknowledges that neither Huntington
nor any successor Holder of this Warrant would have an adequate remedy at law
for any breach of this Warrant and First Michigan hereby agrees that Huntington
and any successor Holder shall be entitled to specific performance of the
obligations of First Michigan hereunder and injunctive relief against actual or
threatened violations of the provisions hereof.

         SECTION 7. ANTIDILUTION PROVISIONS. The number of shares of First 
Michigan Common purchasable upon the exercise hereof shall be subject to
adjustment from time to time as provided in this Section 7.

                  (a) In the event that First Michigan issues any additional
shares of First Michigan Common at any time after the date hereof (including
pursuant to stock option plans), the number of

                                      - 6 -


<PAGE>   14



shares of First Michigan Common which can be purchased pursuant to this Warrant
shall be increased by an amount equal to 19.9 percent of the additional shares
so issued.

                        (b)       (i) In the event that, after the date hereof,
               First Michigan pays or makes a dividend or other distribution of
               any class of capital stock of First Michigan in First Michigan
               Common (including, but not limited to, the issuance of the First
               Michigan 1997 Stock Dividend), the number of shares of First f
               Michigan Common purchasable upon exercise hereof shall be
               increased by multiplying such number of shares by a fraction of
               which the denominator shall be the number of shares of First
               Michigan Common outstanding at the close of business on the day
               immediately preceding the date of such distribution and the
               numerator shall be the sum of such number of shares and the total
               number of shares constituting such dividend or other
               distribution, such increase to become effective immediately after
               the opening of business on the day following such distribution.

                              (ii) In the event that, after the date hereof,
               outstanding shares of First Michigan Common are subdivided into a
               greater number of shares of First Michigan Common, the number of
               shares of First Michigan Common purchasable upon exercise hereof
               at the opening of business on the day following the day upon
               which such subdivision becomes effective shall be proportionately
               increased, and, conversely, in the event that, after the date
               hereof, outstanding shares of First Michigan Common are combined
               into a smaller number of shares of First Michigan Common, the
               number of shares of First Michigan Common purchasable upon
               exercise hereof at the opening of business on the day following
               the day upon which such combination becomes effective shall be
               proportionately decreased, such increase or decrease, as the case
               may be, to become effective immediately after the opening of
               business on the day following the day upon which such subdivision
               or combination becomes effective.

                              (iii) The reclassification (including any
               reclassification upon a merger in which First Michigan is the
               continuing corporation) of First Michigan Common into securities
               including other than First Michigan Common shall be deemed to
               involve a subdivision or combination, as the case may be, of the
               number of shares of First Michigan Common outstanding immediately
               prior to such reclassification into the number of shares of First
               Michigan Common outstanding immediately thereafter and the
               effective date of such reclassification shall be deemed to be the
               day upon which such subdivision or combination becomes effective,
               as the case may be, within the meaning of clause (ii) above.

                  (c) Whenever the number of shares of First Michigan Common
purchasable upon exercise hereof is adjusted pursuant to paragraph (b) above,
the Exercise Price shall be adjusted by multiplying the Exercise Price by a
fraction the numerator of which is equal to the number of shares of First
Michigan Common purchasable prior to the adjustment and the denominator of which
is equal to the number of shares of First Michigan Common purchasable after the
adjustment; provided, however, that no such adjustment of the Exercise Price
shall be made with respect to the

                                      - 7 -


<PAGE>   15



adjustment in the number of shares purchasable upon exercise hereof to be made
pursuant to paragraph (b) above upon the issuance of the First Michigan 1997
Stock Dividend.

                  (d) For the purpose of this Section 7, the term "First
Michigan Common" shall include any shares of First Michigan of any class or
series which has no preference or priority in the payment of dividends or in the
distribution of assets upon any voluntary or involuntary liquidation,
dissolution, or winding up of First Michigan and which is not subject to
redemption by First Michigan.

         SECTION 8.   NOTICE.

                  (a) Whenever the number of shares of First Michigan Common for
which this Warrant is exercisable is adjusted as provided in Section 7 hereof,
First Michigan shall promptly compute such adjustment and mail to the Holder a
certificate, signed by a principal financial officer of First Michigan, setting
forth the number of shares of First Michigan Common for which this Warrant is
exercisable and the adjusted Exercise Price as a result of such adjustment, a
brief statement of the facts requiring such adjustment, the computation thereof,
and when such adjustment will become effective.

                  (b) Upon the occurrence of a Triggering Event First Michigan
shall (i) promptly notify the Holder and/or the "Owner" (as that term is defined
in the Warrant Purchase Agreement) of such event, (ii) promptly compute the
"Warrant Repurchase Price" and the "Warrant Stock Repurchase Price" (as such
terms are defined in the Warrant Purchase Agreement), and (iii) furnish to the
Holder and/or the Owner a certificate, signed by the chief financial officer of
First Michigan setting forth the Warrant Repurchase Price and/or the Warrant
Stock Repurchase Price and the basis and computation thereof.

                  (c) Upon the occurrence of an event which results in this
Warrant becoming convertible into, or exchangeable for, the Substitute Warrant,
as provided in Section 5 hereof, First Michigan and the Acquiring Corporation
shall promptly notify the Holder of such event; and, upon receipt from the
Holder of its choice as to the issuer of the Substitute Warrant, the Acquiring
Corporation shall promptly compute the number of shares of Substitute Common for
which the Substitute Warrant is exercisable and furnish to the Holder a
certificate, signed by a principal financial officer of the Acquiring
Corporation, setting forth the number of shares of Substitute Common for which
the Substitute Warrant is exercisable, the Substitute Warrant exercise price, a
computation thereof, and when such adjustment will become effective.

         SECTION 9. TERMINATION. This Warrant and the rights conferred hereby
shall terminate upon the earliest of (i) six months after the occurrence of a
Triggering Event; (ii) the Effective Date of the Merger, (iii) the date of
termination of the Merger Documents unless the event giving rise to the right to
terminate is preceded by a Triggering Event or the receipt by First Michigan, or
the

                                      - 8 -


<PAGE>   16


announcement by another person, of a proposal involving an Acquisition
Transaction or Tender Offer; or (iv) May 31, 1999.

         IN WITNESS WHEREOF, the undersigned has executed this Warrant as of
this _____ day of May, 1997.

ATTEST:                                  FIRST MICHIGAN BANK CORPORATION

By:                                      By:
   -----------------------                  ------------------------------------
                                            David M. Ondersma, Chairman and
Title:                                      Chief Executive Officer
      --------------------


                                      - 9 -

<PAGE>   1
                                                                Exhibit 2(d)

THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR REGISTERED OR
QUALIFIED UNDER ANY STATE SECURITIES LAWS, AND MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED WITHOUT BEING SO REGISTERED OR QUALIFIED UNLESS AN EXEMPTION OR
EXEMPTIONS FROM SUCH REGISTRATION OR QUALIFICATION REQUIREMENTS ARE AVAILABLE.

                                     WARRANT
                                     -------

                       TO PURCHASE 5,268,716 COMMON SHARES

                                       OF

                         FIRST MICHIGAN BANK CORPORATION

         This is to certify that, for value received, HUNTINGTON BANCSHARES
INCORPORATED, a Maryland corporation ("Huntington"), is entitled to purchase
from FIRST MICHIGAN BANK CORPORATION, a Michigan corporation ("First Michigan"),
at any time on or after the date hereof, an aggregate of up to 5,268,716 common
shares, $1.00 par value per share, of First Michigan ("First Michigan Common"),
at a price of $29.275 per share (the "Exercise Price"), subject to the terms and
conditions of this Warrant and a certain Warrant Purchase Agreement, of even
date herewith, between Huntington and First Michigan (the "Warrant Purchase
Agreement"). The number of shares of First Michigan Common which may be received
upon the exercise of this Warrant and the Exercise Price are subject to
adjustment from time to time as hereinafter set forth. The terms and conditions
set forth in this Warrant and the Warrant Purchase Agreement shall be binding
upon the respective successors and assigns of both of the parties hereto. This
Warrant is issued in connection with a certain Agreement and Plan of Merger,
dated as of the date hereof, between Huntington and First Michigan (the "Merger
Agreement"), which provides for the merger of First Michigan into Huntington
(the "Merger"), and a certain Supplemental Agreement between Huntington and
First Michigan, which provides certain additional terms and conditions relating
to the Merger (the "Supplemental Agreement"). The Merger Agreement and the
Supplemental Agreement are sometimes hereinafter collectively referred to as the
"Merger Documents." All capitalized terms used herein and not otherwise defined
herein shall have the meanings ascribed to them in the Merger Documents. The
term "Holder" shall mean and refer to Huntington or any successor holder of this
Warrant.

         SECTION 1.  EXERCISE OF THE WARRANT.

                  (a) The Holder will not exercise this Warrant unless it has
obtained all required approvals, if any, of appropriate regulatory authorities
having jurisdiction, including the Federal Reserve Board, pursuant to all
applicable laws and regulations. Further, subject to the terms and conditions
set forth in this Warrant and in the Warrant Purchase Agreement and the
provisions of


<PAGE>   2



applicable law, the Holder will not exercise this Warrant without the written
consent of First Michigan except upon the occurrence of any of the following
events (a "Triggering Event"):

               (i)    any material, willful, and intentional breach of the
                      Merger Documents by First Michigan that would permit
                      Huntington to terminate the Merger Documents (A)
                      occurring after the receipt by First Michigan of a
                      proposal to engage in an Acquisition Transaction, (B)
                      occurring after the announcement by any other Person of
                      an intention to engage in an Acquisition Transaction, or
                      (C) in anticipation and for the purpose of engaging in an
                      Acquisition Transaction;

              (ii)    (A) a proposal to engage in an Acquisition Transaction is
                      submitted to and approved by the  shareholders of First
                      Michigan at any time prior to May 31, 1999, or (B) a
                      Tender Offer is commenced and the transactions
                      contemplated in the Tender Offer are completed in such a
                      manner that the Person making the Tender Offer acquires
                      beneficial ownership of more than 20 percent of the
                      capital stock or any other class of voting securities of
                      First Michigan, and the Merger is not consummated prior
                      to May 31, 1999;

             (iii)    (A) a proposal to engage in an Acquisition Transaction is
                      received by First Michigan or a Tender Offer is made
                      directly to the shareholders of First Michigan or the
                      intention of making an Acquisition Transaction or Tender
                      Offer is announced at any time prior to the holding of
                      the First Michigan Shareholders' Meeting; (B) the Board
                      of Directors of First Michigan (1) fails to recommend to
                      the shareholders of First Michigan that they vote their
                      shares of First Michigan Common in favor of the approval
                      of the Merger, (2) withdraws such recommendation
                      previously made, (3) fails to solicit proxies of
                      shareholders of First Michigan to approve the Merger, or
                      (4) fails to hold the First Michigan Shareholders'
                      Meeting; and (C) the Merger is not consummated by May 31,
                      1999;

                  (b) Notwithstanding the foregoing, this Warrant shall not be
exercisable in the event of the failure to consummate the Merger solely as a
result of any of the following: (i) the failure of the shareholders of
Huntington to approve the Merger; (ii) the failure of any Regulatory Authority
to provide any required Consent to the Merger, which failure was not the result
of the existence of the Acquisition Proposal or a breach by First Michigan of
any of its obligations under any of the Merger Documents; or (iii) the Merger
Documents are terminated pursuant to Section 9.1 of the Supplemental Agreement,
unless the event giving rise to the right to terminate is preceded by

                                      - 2 -


<PAGE>   3



a Triggering Event or the receipt by First Michigan of an Acquisition
Transaction proposal, or the announcement by another Person of a proposal
involving an Acquisition Transaction.

                  (c) An "Acquisition Transaction" shall mean a transaction
involving (A) the sale or other disposition of more than 20 percent of the
shares of the capital stock or any other class of voting securities of First
Michigan, including, but not limited to, a Tender Offer, (B) the sale or other
disposition of 15 percent or more of the consolidated assets or deposits of
First Michigan or of the banks owned by First Michigan, in the aggregate, or (C)
a merger or consolidation involving First Michigan other than a transaction
pursuant to which First Michigan will be the surviving corporation and the
current shareholders of First Michigan will be the owners of a majority of the
stock of the surviving corporation following the transaction. As used in this
Section 1, "person" or "group of persons" shall have the meanings assigned to
such terms by Section 13(d) of the 1934 Act. For purposes of this Section 1, a
Tender Offer which is contingent upon the expiration of the Warrant is deemed to
commence when it is announced.

                  (d) This Warrant shall be exercised by presentation and
surrender hereof to First Michigan at its principal office accompanied by (i) a
written notice of exercise for a specified number of shares of First Michigan
Common, (ii) payment to First Michigan, for the account of First Michigan, of
the Exercise Price for the number of shares specified in such notice, and (iii)
a certificate of the Holder indicating the Triggering Event that has occurred
which entitles the Holder to exercise this Warrant. The Exercise Price for the
number of shares of First Michigan Common specified in the notice shall be
payable in immediately available funds.

                  (e) Upon such presentation and surrender, First Michigan shall
issue promptly (and within three business days if requested by the Holder) to
the Holder, or any assignee, transferee, or designee permitted by subparagraph
(g) of this Section 1, the shares to which the Holder is entitled hereunder.

                  (f) If this Warrant should be exercised in part only, First
Michigan shall, upon surrender of this Warrant for cancellation, execute and
deliver a new Warrant evidencing the rights of the Holder thereof to purchase
the balance of the shares purchasable hereunder. Upon receipt by First Michigan
of this Warrant, in proper form for exercise, the Holder shall be deemed to be
the holder of record of the shares of First Michigan Common issuable upon such
exercise, notwithstanding that the stock transfer books of First Michigan shall
then be closed or that certificates representing such shares of First Michigan
Common shall not then be actually delivered to the Holder. First Michigan shall
pay all expenses, and any and all federal, state, and local taxes and other
charges that may be payable in connection with the preparation, issue, and
delivery of stock certificates under this Section 1 in the name of the Holder or
of any assignee, transferee, or designee permitted by subparagraph (g) of this
Section 1.

                  (g) This Warrant, once exercisable, or any warrant shares
acquired by the Holder by its exercise, may be sold or transferred in whole or
in part to any person, subject to the receipt by such person of approvals of
appropriate regulatory authorities having jurisdiction, including the Federal
Reserve Board, pursuant to all applicable laws and regulations, to the extent
required.

                                      - 3 -


<PAGE>   4



         SECTION 2.   CERTAIN COVENANTS AND REPRESENTATIONS OF FIRST MICHIGAN.

                  (a) First Michigan shall at all times maintain sufficient
authorized but unissued shares of First Michigan Common so that this Warrant may
be exercised without additional authorization of the holders of First Michigan
Common, after giving effect to all other options, warrants, convertible
securities, and other rights to purchase First Michigan Common.

                  (b) First Michigan represents and warrants to the Holder that
the shares of First Michigan Common issued upon an exercise of this Warrant will
be duly authorized, fully paid, non-assessable, and subject to no preemptive
rights.

                  (c) First Michigan agrees (i) that it will not, by charter
amendment or through reorganization, consolidation, merger, dissolution or sale
of assets, or by any other voluntary act, avoid or seek to avoid the observance
or performance of any of the covenants, stipulations, or conditions to be
observed or performed hereunder by First Michigan; (ii) promptly to take all
action as may from time to time be required, including, without limitation (A)
complying with all pre- merger notification, reporting, and waiting period
requirements specified in 15 U.S.C. ss.18a and regulations promulgated
thereunder, and (B) in the event, under the Bank Holding Company Act of 1956, as
amended (the "Bank Holding Company Act"), or the Change in Bank Control Act of
1978, or other statute, the prior approval of the Federal Reserve Board or other
regulatory agency (collectively, the "Agencies"), is necessary before the
Warrant may be exercised or transferred, cooperate fully with the Holder in
preparing such applications and providing such information to the Agencies as
the Agencies may require in order to permit the Holder to exercise or transfer
this Warrant and First Michigan duly and effectively to issue shares pursuant to
the exercise hereof; and (iii) promptly to take all action provided herein to
protect the rights of the Holder against dilution.

         SECTION 3. FRACTIONAL SHARES. First Michigan shall not be required to
issue fractional shares of First Michigan Common upon an exercise of this
Warrant but shall pay for such fraction of a share in cash or by certified or
official bank check at the Exercise Price.

         SECTION 4. EXCHANGE OR LOSS OF WARRANT. This Warrant is exchangeable,
without expense, at the option of the Holder, upon presentation and surrender
hereof at the principal office of First Michigan for other Warrants of different
denominations entitling the Holder thereof to purchase in the aggregate the same
number of shares of First Michigan Common purchasable hereunder. The term
"Warrant" as used herein includes any warrants for which this Warrant may be
exchanged. Upon receipt by First Michigan of evidence reasonably satisfactory to
it of the loss, theft, destruction, or mutilation of this Warrant, and (in the
case of loss, theft, or destruction) of reasonably satisfactory indemnification,
and upon surrender and cancellation of this Warrant, if mutilated, First
Michigan will execute and deliver a new Warrant of like tenor and date. Any such
new Warrant executed and delivered shall constitute an additional contractual
obligation on the part of First Michigan, whether or not the Warrant so lost,
stolen, destroyed, or mutilated shall at any time be enforceable by anyone.

                                      - 4 -


<PAGE>   5



         SECTION 5.  CERTAIN TRANSACTIONS.

                  (a) In case First Michigan shall (i) consolidate with or merge
into any Person, other than Huntington or one of its Affiliates, and shall not
be the continuing or surviving corporation of such consolidation or merger, (ii)
permit any Person, other than Huntington or one of its Affiliates, to merge into
First Michigan and First Michigan shall be the continuing or surviving
corporation, but, in connection with such merger, the then outstanding shares of
First Michigan Common shall be changed into or exchanged for stock or other
securities of any other Person or cash or any other property, or (iii) sell or
otherwise transfer all or substantially all of its assets to any Person, other
than Huntington or one of its Affiliates, then, and in any such case, the
agreement governing such transaction shall make proper provision so that this
Warrant shall, upon the consummation of any such transaction and upon the terms
and conditions set forth herein, be converted into, or exchanged for, a warrant,
at the option of the Holder, of either (A) the Acquiring Corporation (as
hereinafter defined), (B) any company which controls the Acquiring Corporation,
or (C) in the case of a merger described in clause (a)(ii) above, First
Michigan, in which case such warrant shall be a newly issued warrant (in any
such case, the "Substitute Warrant").

                  (b) For purposes of this Section 5, the following terms have 
the meanings indicated:

                              (i) "Acquiring Corporation" shall mean (A) the i i
               continuing or surviving corporation of a consolidation or merger
               with First Michigan (if other than First Michigan), (B) the
               corporation merging into First Michigan in a merger in which
               First Michigan is the continuing or surviving person and in
               connection with which the then outstanding shares of First
               Michigan Common are changed into or exchanged for stock or other
               securities of any other Person or cash or any other property, or
               (C) the transferee of all or substantially all of First
               Michigan's assets;

                              (ii) "Substitute Common" shall mean the common
               stock issued by the issuer of the Substitute Warrant;

                              (iii) "Assigned Value" shall mean the Market/Offer
               Price as determined pursuant to paragraph 7(b) of the Warrant
               Purchase Agreement; provided, however, that in the event of a
               sale of all or substantially all of First Michigan's assets, the
               Assigned Value shall be the sum of the price paid in such sale
               for such assets and the current market value of the remaining
               assets of First Michigan as determined by a recognized investment
               banking firm selected by the Holder, divided by the number of
               shares of First Michigan Common outstanding at the time of such
               sale;

                              (iv) "Average Price" shall mean the average
               closing price of a share of Substitute Common for the one year
               immediately preceding the consolidation, merger, or sale in
               question, but in no event higher than the closing price of the
               shares of Substitute Common on the day preceding such
               consolidation, merger, or sale; provided that if First Michigan
               is the issuer of the Substitute

                                      - 5 -


<PAGE>   6



               Warrant, the Average Price shall be computed with respect to a
               share of the common stock issued by the Person merging into First
               Michigan or by any company which controls such Person, as the
               Holder may elect;

                              (v) A "Person" shall mean any individual, firm,
               corporation or other entity and include as well any syndicate or
               group deemed to be a "person" by Section 13(d)(3) of the
               Securities Exchange Act of 1934, as amended; and

                              (vi) "Affiliate" shall have the meaning ascribed
               to such term in Rule 12b-2 of the General Rules and Regulations
               under the Securities Exchange Act of 1934, as amended.

                  (c) The Substitute Warrant shall have the same terms as this
Warrant, provided that, if the terms of the Substitute Warrant cannot, for legal
reasons, be the same as this Warrant, such terms shall be as similar as possible
and in no event less advantageous to the Holder. The issuer of the Substitute
Warrant shall also enter into an agreement with the then Holder of the
Substitute Warrant in substantially the same form as the Warrant Purchase
Agreement, which shall be applicable to the Substitute Warrant.

                  (d) The Substitute Warrant shall be exercisable for such
number of shares of Substitute Common as is equal to the Assigned Value
multiplied by the number of shares of First Michigan Common for which this
Warrant is then exercisable, divided by the Average Price. The exercise price of
the Substitute Warrant per share of Substitute Common shall be equal to the
Exercise Price multiplied by a fraction in which the numerator is the number of
shares of First Michigan Common for which this Warrant is then exercisable and
the denominator is the number of shares of Substitute Common for which the
Substitute Warrant is exercisable.

         SECTION 6.  RIGHTS OF THE HOLDER; REMEDIES.

                  (a) The Holder shall not, by virtue hereof and prior to the
exercise hereof, be entitled to any rights of a holder of First Michigan Common.

                  (b) Without limiting the foregoing or any remedies available
to the Holder, First Michigan specifically acknowledges that neither Huntington
nor any successor Holder of this Warrant would have an adequate remedy at law
for any breach of this Warrant and First Michigan hereby agrees that Huntington
and any successor Holder shall be entitled to specific performance of the
obligations of First Michigan hereunder and injunctive relief against actual or
threatened violations of the provisions hereof.

         SECTION 7. ANTIDILUTION PROVISIONS.  The number of shares of First 
Michigan Common purchasable upon the exercise hereof shall be subject to
adjustment from time to time as provided in this Section 7.

                  (a) In the event that First Michigan issues any additional
shares of First Michigan Common at any time after the date hereof (including
pursuant to stock option plans), the number of

                                      - 6 -


<PAGE>   7



shares of First Michigan Common which can be purchased pursuant to this Warrant
shall be increased by an amount equal to 19.9 percent of the additional shares
so issued.

                        (b)       (i) In the event that, after the date hereof,
               First Michigan pays or makes a dividend or other distribution of
               any class of capital stock of First Michigan in First Michigan
               Common (including, but not limited to, the issuance of the First
               Michigan 1997 Stock Dividend), the number of shares of First
               Michigan Common purchasable upon exercise hereof shall be
               increased by multiplying such number of shares by a fraction of
               which the denominator shall be the number of shares of First
               Michigan Common outstanding at the close of business on the day
               immediately preceding the date of such distribution and the
               numerator shall be the sum of such number of shares and the total
               number of shares constituting such dividend or other
               distribution, such increase to become effective immediately after
               the opening of business on the day following such distribution.

                              (ii) In the event that, after the date hereof,
               outstanding shares of First Michigan Common are subdivided into a
               greater number of shares of First Michigan Common, the number of
               shares of First Michigan Common purchasable upon exercise hereof
               at the opening of business on the day following the day upon
               which such subdivision becomes effective shall be proportionately
               increased, and, conversely, in the event that, after the date
               hereof, outstanding shares of First Michigan Common are combined
               into a smaller number of shares of First Michigan Common, the
               number of shares of First Michigan Common purchasable upon
               exercise hereof at the opening of business on the day following
               the day upon which such combination becomes effective shall be
               proportionately decreased, such increase or decrease, as the case
               may be, to become effective immediately after the opening of
               business on the day following the day upon which such subdivision
               or combination becomes effective.

                              (iii) The reclassification (including any
               reclassification upon a merger in which First Michigan is the
               continuing corporation) of First Michigan Common into securities
               including other than First Michigan Common shall be deemed to
               involve a subdivision or combination, as the case may be, of the
               number of shares of First Michigan Common outstanding immediately
               prior to such reclassification into the number of shares of First
               Michigan Common outstanding immediately thereafter and the
               effective date of such reclassification shall be deemed to be the
               day upon which such subdivision or combination becomes effective,
               as the case may be, within the meaning of clause (ii) above.

                  (c) Whenever the number of shares of First Michigan Common
purchasable upon exercise hereof is adjusted pursuant to paragraph (b) above,
the Exercise Price shall be adjusted by multiplying the Exercise Price by a
fraction the numerator of which is equal to the number of shares of First
Michigan Common purchasable prior to the adjustment and the denominator of which
is equal to the number of shares of First Michigan Common purchasable after the
adjustment; provided, however, that no such adjustment of the Exercise Price
shall be made with respect to the

                                      - 7 -


<PAGE>   8



adjustment in the number of shares purchasable upon exercise hereof to be made
pursuant to paragraph (b) above upon the issuance of the First Michigan 1997
Stock Dividend.

                  (d) For the purpose of this Section 7, the term "First
Michigan Common" shall include any shares of First Michigan of any class or
series which has no preference or priority in the payment of dividends or in the
distribution of assets upon any voluntary or involuntary liquidation,
dissolution, or winding up of First Michigan and which is not subject to
redemption by First Michigan.

         SECTION 8.   NOTICE.

                  (a) Whenever the number of shares of First Michigan Common for
which this Warrant is exercisable is adjusted as provided in Section 7 hereof,
First Michigan shall promptly compute such adjustment and mail to the Holder a
certificate, signed by a principal financial officer of First Michigan, setting
forth the number of shares of First Michigan Common for which this Warrant is
exercisable and the adjusted Exercise Price as a result of such adjustment, a
brief statement of the facts requiring such adjustment, the computation thereof,
and when such adjustment will become effective.

                  (b) Upon the occurrence of a Triggering Event First Michigan
shall (i) promptly notify the Holder and/or the "Owner" (as that term is defined
in the Warrant Purchase Agreement) of such event, (ii) promptly compute the
"Warrant Repurchase Price" and the "Warrant Stock Repurchase Price" (as such
terms are defined in the Warrant Purchase Agreement), and (iii) furnish to the
Holder and/or the Owner a certificate, signed by the chief financial officer of
First Michigan setting forth the Warrant Repurchase Price and/or the Warrant
Stock Repurchase Price and the basis and computation thereof.

                  (c) Upon the occurrence of an event which results in this
Warrant becoming convertible into, or exchangeable for, the Substitute Warrant,
as provided in Section 5 hereof, First Michigan and the Acquiring Corporation
shall promptly notify the Holder of such event; and, upon receipt from the
Holder of its choice as to the issuer of the Substitute Warrant, the Acquiring
Corporation shall promptly compute the number of shares of Substitute Common for
which the Substitute Warrant is exercisable and furnish to the Holder a
certificate, signed by a principal financial officer of the Acquiring
Corporation, setting forth the number of shares of Substitute Common for which
the Substitute Warrant is exercisable, the Substitute Warrant exercise price, a
computation thereof, and when such adjustment will become effective.

         Section 9. TERMINATION. This Warrant and the rights conferred hereby
shall terminate upon the earliest of (i) six months after the occurrence of a
Triggering Event; (ii) the Effective Date of the Merger, (iii) the date of
termination of the Merger Documents unless the event giving rise to the right to
terminate is preceded by a Triggering Event or the receipt by First Michigan, or
the

                                      - 8 -


<PAGE>   9


announcement by another person, of a proposal involving an Acquisition
Transaction or Tender Offer; or (iv) May 31, 1999.

         IN WITNESS WHEREOF, the undersigned has executed this Warrant as of
this 5th day of May, 1997.

ATTEST:                                 FIRST MICHIGAN BANK CORPORATION

By:    /s/ Stephen A. Stream            By:    /s/ David M. Ondersma
   ------------------------------          -----------------------------------
                                             David M. Ondersma, Chairman and
Title:    Secretary                          Chief Executive Officer
      ---------------------------

                                      - 9 -



<PAGE>   1
                                                                  Exhibit 99


[NEWS RELEASE - LOGO]                                    [HUNTINGTON BANK LOGO]


FOR IMMEDIATE RELEASE                       FOR FURTHER INFORMATION, CONTACT:
SUBMITTED:  MAY 5, 1997                              ANNE CREEK (614) 480-3954

                       HUNTINGTON BANCSHARES INCORPORATED
                   TO ACQUIRE FIRST MICHIGAN BANK CORPORATION

         COLUMBUS, Ohio -- Huntington Bancshares Incorporated (NASDAQ: HBAN;
www.huntington.com) announced today it has signed a definitive agreement to
acquire First Michigan Bank Corporation, a $3.6 billion bank holding company
headquartered in Holland, Michigan.

         First Michigan Bank Corporation ("First Michigan") is a multi-bank
holding company with ninety banking offices, all in Michigan. The primary market
areas are Grand Rapids, Holland, Kalamazoo and Muskegon which represents
approximately 80% of the bank's deposits. First Michigan reported a 1.27% return
on assets in 1996 on net income of $42.2 million. Upon completion of the
acquisition, it is intended that the bank subsidiaries of First Michigan will be
merged into The Huntington's lead subsidiary, The Huntington National Bank.

         Under the terms of the merger, the shareholders of First Michigan will
receive 1.05 shares of Huntington Bancshares common stock for every 1 share of
First Michigan stock in a fixed tax free exchange. Based on Huntington's closing
stock price on May 2, 1997 ($30.00 per share), this exchange ratio represents a
price of $31.50 for each First Michigan share and equates to a current market
valuation of $908 million. The combined company would have assets in excess of
$25 billion, stockholders' equity of approximately $1.9 billion and a market
capitalization of approximately $5.2 billion. Subject to regulatory and
shareholder approvals, the transaction is expected to close late in the third
quarter of 1997.

Frank Wobst, chairman and chief executive officer of Huntington Bancshares
stated, "First Michigan is a premier banking franchise in Michigan and has
reported record earnings for fifteen consecutive years. Western Michigan, where
First Michigan has a significant market share, is one of the fastest growing
markets in the United States. This merger significantly expands our Michigan
market share and enables us to realize important synergies in our consumer,
commercial and fee based businesses. Additionally, First Michigan's customer
profile is poised to take advantage of Huntington's technology which will
provide opportunities to improve efficiency and fee income through Huntington's
multi-channel delivery network. Upon completion of this transaction, Huntington
will have approximately $6 billion in assets in Michigan making it our second
largest market after Ohio."

                                     -More-


<PAGE>   2


David Ondersma, chairman and chief executive officer of First Michigan Bank
Corporation stated, "We are very excited to join forces with The Huntington. Our
customers, employees and shareholders have the opportunity to be affiliated with
an excellent regional banking franchise with a long-term record of superb
profitability and outstanding shareholder returns."

This transaction, accounted for as a pooling, is expected to be slightly
accretive to earnings in 1998 and accretive by 4% in 1999. A pre-tax merger
related charge of approximately $35 million will be recognized in the quarter
the merger is completed. First Michigan has issued a warrant in favor of The
Huntington to purchase up to 19.9% of the outstanding shares, at an exercise
price of $29.275 per share, which is exercisable upon the occurrence of certain
events.

The merger is expected to result in annual cost savings of at least $19 million,
representing 15% of Michigan's expense base in 1998, through the elimination of
redundant systems and excess capacity in addition to improving branch
efficiencies and offering customers increased alternative delivery channels for
bank products and services.

After the merger, David M. Ondersma, currently Chairman and CEO of First
Michigan, will become Chairman of the Huntington Michigan region; Richard A.
McNeece, currently President and CEO of Huntington Bank of Michigan, will become
President and CEO of the Huntington Michigan region; and Stephen A. Stream,
currently President of First Michigan, will be named President of Huntington
Western Michigan region.

Huntington Bancshares is a regional bank holding company headquartered in
Columbus, Ohio with assets in excess of $21 billion. The company's banking
subsidiaries operate 355 offices in Ohio, Florida, Indiana, Kentucky, Michigan
and West Virginia. Huntington's mortgage, trust, investment banking, and
automobile finance subsidiaries manage 81 offices in the six states mentioned as
well as Georgia, Maryland, New Jersey, North Carolina, South Carolina,
Pennsylvania and Virginia.

                                     -More-
<PAGE>   3

                       HUNTINGTON BANCSHARES INCORPORATED
                 ACQUISITION OF FIRST MICHIGAN BANK CORPORATION

PROFILE OF HUNTINGTON BANCSHARES INCORPORATED
- ---------------------------------------------
    - Headquarters -- Columbus, Ohio

    - 3/31/97 Assets -- $21.6 billion

    - Three Months Ended 3/31/97 Performance
      --------------------------------------
                  Net Income                         $66.5 million
                  Return on Average Assets            1.28%
                  Return on Average Equity           17.75%
                  Efficiency Ratio                   56.27%
                  Book Value Per Share               $10.82

                                             Assets ($billions)        Banking
         Principle Markets                  As of March 31, 1997        Offices
         -----------------                  --------------------        -------
         Ohio/N. Kentucky                           14.4                  202
         West Virginia                               2.2                   43
         Michigan                                    2.1                   43
         Indiana                                     1.2                   24
         Florida                                     1.7                   43
                                                    ----                  ---
                                                    21.6                  355

PROFILE OF FIRST MICHIGAN BANK CORPORATION
- ------------------------------------------
    - Headquarters - Holland, Michigan

    - 3/31/97              Assets                    $3.6 billion
                           Deposits                  $3.0 billion
                           Equity                    $279 million
                           Banking Offices             90

    - Three Months Ended 3/31/97 Performance

                  Net Income                            $10.7 million
                  Return on Average Assets               1.21%
                  Return on Average Equity              15.34%
                  Efficiency Ratio                      59.17%
                  Book Value Per Share*                 10.57

    *  Unadjusted for stock dividend payable 5/30/97


                              ### 
<PAGE>   4
TRANSACTION SUMMARY   [LOGO]


AGREEMENT:               DEFINITIVE MERGER AGREEMENT SIGNED 5/5/97

STRUCTURE:               TAX FREE EXCHANGE

EXCHANGE RATIO:          1.05 HUNTINGTON SHARES FOR EACH SHARE OF FIRST MICHIGAN

PURCHASE PRICE:          $908 MILLION(a)

TERMS:                   FIXED EXCHANGE RATIO, NO COLLAR
                         WALKWAY PROVISION - 20% ABSOLUTE DECLINE AND 15%
                         RELATIVE DECLINE TO S&P REGIONAL BANK INDEX

ACCOUNTING TREATMENT:    POOLING OF INTERESTS

STOCK BUYBACKS:          HUNTINGTON HAS SUSPENDED ITS STOCK BUYBACK
                         PROGRAM 

OPTIONS:                 19.9% OPTION GRANTED TO HUNTINGTON

DUE DILIGENCE:           COMPLETED

ANTICIPATED CLOSING:     SEPTEMBER 30, 1997

ACCRETION:               1% ($.02) 1998; 4% ($.09) 1999

(a)  BASED ON 5/2/97 HBAN MARKET PRICE



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