SKY FINANCIAL GROUP INC
10-K405, 1999-03-16
NATIONAL COMMERCIAL BANKS
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<PAGE>   1
                               UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                          WASHINGTON, D.C.  20549

                                 FORM 10-K

[x]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
     SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 1998

                        Commission File No. 1-14473

                         Sky Financial Group, Inc.
          (Exact Name of Registrant as Specified in its Charter)

         Ohio                                  34-1372535         
(State of Other Jurisdiction of              (IRS Employer
 Incorporation or Organization)           Identification Number)

221 South Church Street, Bowling Green, Ohio            43402  
(Address of Principal Executive Office)               (Zip Code)

                               (419) 327-6300      
                      (Registrant's Telephone Number)

Securities registered pursuant to Section 12 (b) of the Act:  None
Securities registered pursuant to Section 12 (g) of the Act:

                      Common Stock, without par value
                              (Title of class)

Indicate by check mark whether the registrant (1) has filed all reports 
required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 
1934 during the preceding 12 months (or for such shorter period that the 
registrant was required to file such reports), and (2) has been subject to 
such filing requirements for the past 90 days.     Yes [ X ]   No [   ]   

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 
of Regulation S-K is not contained herein, and will not be contained, to the 
best of registrant's knowledge, in definitive proxy or information statements 
incorporated by reference in Part III of the Form 10-K. [ X ]

Based on the closing sales price of February 28, 1999 the aggregate market 
value of the voting stock held by non-affiliates of the Registrant was 
approximately $1,040,043,000.

The number of shares outstanding of the Registrant's common stock, without par 
value was 44,991,153 at February 28, 1999.

DOCUMENTS INCORPORATED BY REFERENCE*                 WHERE INCORPORATED
Annual Report Supplement to Shareholders
  for year ended December 31, 1998                    Parts I, II and IV
Definitive Proxy Statement for the Annual
  Meeting of Shareholders to be held April 21,
  1999, and filed with the Securities and Exchange
  Commission on March 10, 1999                        Part  III

*As stated under various items of this report, only specified portions of such 
documents are incorporated by reference herein.

                                      1
<PAGE>   2


                                INDEX

<TABLE>
<CAPTION>

                                                               10-K 
                                                               Page
<S>                                                             <C>
PART I
Item 1.  Business ........................................       3

Item 2.  Properties ......................................       8

Item 3.  Legal Proceedings ...............................       8

Item 4.  Submission of Matters to a Vote of Security
         Holders .........................................       8

PART II
Item 5.  Market for Registrant's Common Stock and Related
         Shareholder Matters .............................       9

Item 6.  Selected Financial Data .........................       9

Item 7.  Management's Discussion and Analysis of Financial
         Condition and Results of Operations .............       9

Item 7A. Quantitative and Qualitative Disclosures About
         Market Risk .....................................       9

Item 8.  Financial Statements and Supplementary Data .....       9

Item 9.  Changes in and Disagreements with Accountants on
         Accounting and Financial Disclosure .............       9

PART III
Item 10. Directors and Executive Officers of Registrant ..      10

Item 11. Executive Compensation ..........................      11

Item 12. Security Ownership of Certain Beneficial Owners
         and Management ..................................      11

Item 13. Certain Relationships and Related Transactions ..      11

PART IV
Item 14. Exhibits, Financial Statement Schedules and
          Reports on Form 8-K ............................      12

Signatures ...............................................      14

Exhibit Index ............................................      16
</TABLE>






                                      2


<PAGE>   3


PART I


Item 1.  INFORMATION ABOUT SKY FINANCIAL GROUP, INC.

Sky Financial Group, Inc. (the Company), a financial services holding company, 
has five bank subsidiaries with a total of 156 banking centers located in 
Ohio, southern Michigan, western Pennsylvania and West Virginia.  The Company 
also owns nine financial services subsidiaries which engage in lines of  
business which are closely related to banking.  Based on total assets as of 
December 31, 1998, the Company was the 7th largest bank holding company based 
in Ohio.  Through its banking subsidiaries, the Company offers a wide range of 
lending, depository, trust, and related financial services to individual and 
business customers.  Through its financial services subsidiaries, the Company 
offers specialty lending, investment, trust, collection and related financial
services to individual and business customers.


The Holding Company

Sky Financial Group, Inc., a registered bank holding company, is the 
resulting company from the October 2, 1998 merger of equals between Citizens 
Bancshares, Inc. (Bancshares) and Mid Am, Inc. (Mid Am).  In conjunction with 
the merger, Bancshares changed its name to Sky Financial Group, Inc.  The 
Company's corporate philosophy is to encourage its subsidiaries to operate as 
locally-oriented, community-based financial service affiliates, augmented by 
experienced, centralized support from the Company in selected critical areas.  
This local market orientation is reflected in the bank subsidiaries' boards of 
directors and branch banking centers, which generally have advisory boards 
comprised of local business persons, professionals and other community 
representatives, that assist the banking centers in responding to local 
banking needs.  The bank subsidiaries concentrate on customer service and 
business development, while relying upon the support of the Company in 
identifying operational areas that can be effectively centralized without 
sacrificing the benefits of a local orientation.  Primary candidates for 
centralization are those functions which are not readily visible to customers 
and those which are critical to risk management.  Asset quality review, data 
processing, loan and deposit processing, certain mortgage banking activities, 
financial reporting, investment activities, internal audit, compliance and 
funds management are among the functions which are managed at the holding 
company level.

The Company's market area is economically diverse, with a base of 
manufacturing, service industries, transportation and agriculture, and is not 
dependent upon any single industry or employer.  Similarly, the Company's 
customer base is diverse, and the Company and its subsidiaries are not 
dependent upon any single industry or upon any single customer.

Sky Financial Group, Inc.'s strategic plan includes expansion, market 
diversification and growth of its fee-based income through internal business 
formations, internal growth and through acquisitions of financial 
institutions, branches and financial service businesses.  The Company seeks 
acquisition partners with experienced management, which have significant 
market presence or have potential for improved profitability through financial
management, economies of scale and expanded services.


                                      3
<PAGE>   4

There is significant competition in the financial services industry in the 
Company's market area among commercial banks.  As a result of the deregulation 
of the financial services industry, the Company also competes with other 
providers of financial services such as savings and loan associations, credit 
unions, consumer finance companies, securities firms, insurance companies, 
commercial finance and leasing companies, the mutual funds industry, full
service brokerage firms and discount brokerage firms.  Some of the Company's 
competitors, including certain regional bank holding companies which have made 
acquisitions in the Company's market area, have substantially greater 
resources than those of the Company, and as such, may have higher lending 
limits and may offer other services not available through the bank and non-
bank subsidiaries.  The bank and non-bank subsidiaries compete on the basis of 
rates of interest charged on loans, the rates of interest paid for funds, the 
availability of services and the responsiveness to the needs of its customers.

The Company's executive offices are located at 221 South Church Street, 
Bowling Green, Ohio, and its telephone number is (419)327-6300.


The Bank Subsidiaries

Mid American National Bank and Trust Company (Mid Am Bank), headquartered in 
Toledo, Ohio, was formed in 1952.  With total assets of $1.025 billion at 
December 31, 1998, it operates 36 banking centers in northwest Ohio.

First National Bank Northwest Ohio (First National), headquartered in Bryan, 
Ohio, was founded in 1933 and joined the Company in 1988.  First National had 
total assets of $542 million at December 31, 1998, and operates through 18
banking centers in the northwest corner of Ohio.

Adrian State Bank (Adrian) is the Company's Adrian, Michigan headquartered 
state-chartered bank, which was acquired by the Company in 1995.  Adrian had 
total assets of $171 million at December 31, 1998, and operates 6 banking 
centers in southeastern Michigan.

The Citizens Banking Company (Citizens), headquartered in Salineville, Ohio 
and owned by the Company since 1982, was organized and chartered in 1902.  
Citizens had total assets of $1.809 billion at December 31, 1998, and operates 
62 banking centers in eastern Ohio, western Pennsylvania and West Virginia.

The Ohio Bank (Ohio Bank), headquartered in Findlay, Ohio, was organized in 
1897.  At December 31, 1998, Ohio Bank had total assets of $1.223 billion and  
34 banking centers in central western Ohio.

On January 24, 1999, First National and Adrian merged into Mid Am Bank which 
converted to an Ohio chartered bank and changed its name to Mid Am Bank.


The Financial Services Subsidiaries

Sky Asset Management Services, Inc. (SAMSI) is the Company's Florida-based 
professional recovery services firm, formed in 1996 as a result of the merger 
of two of the Company's collection affiliates.  SAMSI serves various 
governmental agencies, retail, insurance and commercial clients primarily in 
the Southeastern United States.

                                      4
<PAGE>   5



Sky Investments, Inc. (SII), Bryan, Ohio is the Company's broker/dealer 
affiliate, which provides its customers investment services throughout the 
United States through its 175 registered representatives.  SII also provides 
non-depository investment products to the customers of the Bank Subsidiaries.

Mid Am Credit Corp. (MACC) is the Company's specialized medical financing and 
leasing unit based in Columbus, Ohio.  Beginning with its formation in 1996, 
MACC has offered medical equipment and practice acquisition financing to 
medical professionals throughout the United States.  MACC intends to sell 
substantially all of its financing originations to funding sources in the
secondary market.

Mid Am Financial Services, Inc. (MAFSI) and its subsidiary Simplicity Mortgage 
Consultants, Inc. (Simplicity) is the Company's consumer finance company 
headquartered in Carmel, Indiana.  MAFSI, formed by the Company in connection 
with the Company's 1996 acquisition of Simplicity, engages in
non-conforming residential mortgage lending for customers with difficult 
financing needs, and sells substantially all of its originations in the 
secondary market.

Mid Am Private Trust, N.A. (MAPT), Cleveland, Ohio, was formed in 1997 as the 
Company's specialty trust bank subsidiary.  MAPT was created to provide 
families with substantial financial resources and individual and corporate 
trustees a unique approach to fiduciary services through "insourcing" 
investment managers and estate planners.  MAPT expects to conduct business on 
a nationwide basis.

Sky Technology Resources, Inc. (Sky Tech) is the Company's data processing and 
operations affiliate which, through its Bowling Green, Ohio-based facility, 
provides comprehensive back-room services and support to all of the Company's 
affiliates.

Freedom Financial Life Insurance Company (Freedom), owned by the Company since 
1985, was organized and chartered under the laws of the State of Arizona.  
Freedom is a reinsurance company providing credit life and accident and health 
insurance coverage to loan customers of the banks.

Freedom Express, Inc. (Express), owned by the Company since 1994, was 
chartered in Ohio in 1984.  Express is a courier company formed to transport 
papers and documents between and among the states of Ohio, Pennsylvania and 
West Virginia.


Supervision and Regulation

The Company is subject to the provisions of the Bank Holding Company Act of 
1956, as amended (the Act), which requires a bank holding company to register 
under the Act and to be subject to the regulations of the Board of Governors 
of the Federal Reserve System (FRB).  Pursuant to Federal Reserve policy, the 
Company is expected to act as a source of financial strength to each
subsidiary bank and to commit resources to support such banks.  As a bank 
holding company, the Company is required to file with the Board of Governors 
an annual report and such additional information as the Board of Governors may 
require pursuant to the Act.  The Act requires prior approval by the Board of 
Governors of the acquisition by a bank holding company, or any subsidiary
thereof, of more than five percent (5%) of the voting stock or substantially 
all the assets of any bank within the United States.
 
                                      5
<PAGE>   6

The Act also prohibits a bank holding company, with certain exceptions, from 
acquiring more than five percent (5%) of the voting stock of any company that 
is not a bank and from engaging in any business other than banking or managing 
or controlling banks.  The Board of Governors is also authorized to approve,
among other things, the ownership of shares by a bank holding company in any 
company the activities of which the Board of Governors has determined to be so 
closely related to banking or managing or controlling banks as to be a proper 
incident thereto.  The Board of Governors has, by regulation, determined that
certain activities, including mortgage banking, operating small loan 
companies, factoring, furnishing certain data processing operations, holding 
or operating properties used by banking subsidiaries or acquired for such 
future use, providing certain investment and financial advice, leasing 
(subject to certain conditions) real or personal property, providing 
management consulting advice to certain depository institutions, providing
securities brokerage services, arranging commercial real estate equity 
financing, underwriting and dealing in bank eligible securities, providing 
consumer financial counseling, operating a collection agency, owning and 
operating a savings association, operating a credit bureau and conducting 
certain real estate investment activities and acting as insurance agent for 
certain types of insurance, are closely related to banking within the
meaning of the Act.  It also has determined that certain other activities, 
including real estate brokerage and syndication, land development, and 
property management, are not related to credit transactions and are not 
permissible.  Each of the non-banking activities conducted by the Company 
through its financial services affiliates are activities which have been 
deemed by the Board of Governors to be closely related to banking within the
meaning of the Act. 

The Act and the regulations of the Board of Governors prohibit banks from 
engaging in certain tie-in arrangements in connection with any extension of 
credit, lease or sale of property, or furnishing of services.  The Act also 
imposes certain restrictions upon dealing by affiliated banks with the holding
company and among themselves including restrictions on interbank borrowing and 
upon dealings in respect to the securities or obligations of the holding 
company or other affiliates.

The Company is a legal entity separate and distinct from its banking and other 
subsidiaries.  Most of the Company's revenues result from dividends paid to it 
by its bank subsidiaries.  There are statutory and regulatory requirements 
applicable to the payment of dividends by subsidiary banks as well as by the
Company to its shareholders.

With the completion of the bank consolidations in January, 1999, the Company's 
three remaining bank subsidiaries, Mid Am Bank, Citizens and Ohio Bank are all 
Ohio chartered banks and subject to supervision and regular examination by the 
Ohio Divisions of Financial Institutions (DFI), and as members of the Federal 
Reserve System, are subject to the applicable provisions of the Federal 
Reserve Act.  The Company's financial service subsidiaries are subject to 
various state and federal regulatory bodies and licensing agencies.  SII is 
subject to regulations of the Federal Reserve Board, the Securities and
Exchange Commission and supervision by the National Association of Securities 
Dealers as well as various state securities and insurance regulatory agencies.  
SAMSI, MAFSI and MACC are subject to various state licensing requirements and 
are subject to the regulations of the Federal Reserve Board.  The Company, as 
a bank holding company, is subject to supervision and regular examination by 
the Federal Reserve System.  The deposits of all banking subsidiaries of the 
Company are insured by the Federal Deposit Insurance Corporation, to the 
extent provided by law, and as such are subject to the provisions of the 
Federal Deposit Insurance Act.

                                      6
<PAGE>   7

Each Ohio chartered banking association is required by law to obtain the prior 
approval of the DFI for the declaration and payment of dividends if the total 
of all dividends declared by the board of directors of such bank in any year 
will exceed the total of (i) such bank's net profits (as defined and 
interpreted by regulation) for that year plus (ii) the retained net profits
(as defined and interpreted by regulation) for the preceding two years. 

The payment of dividends by the Company and the Company's subsidiaries is also 
affected by various regulatory requirements and policies, such as the 
requirement to maintain capital at or above regulatory guidelines.  In 
addition, if, in the opinion of the applicable regulatory authority, a bank 
under its jurisdiction is engaged in or is about to engage in an unsafe or
unsound practice (which, depending on the financial condition of the bank, 
could include the payment of dividends), such authority may require, after 
notice and hearing, that such bank cease and desist from such practice.  The 
FRB and the DFI have each indicated that paying dividends that deplete a 
bank's capital base to an inadequate level should be an unsafe and unsound
banking practice.  The FRB, the DFI and the FDIC have issued policy statements 
which provide that bank holding companies and insured banks should generally 
only pay dividends out of current operating earnings.

In addition, the information contained in Note 19 "Regulatory Matters" on 
pages S-51 through S-53 of the Company's 1998 Annual Report Supplement is 
incorporated by reference in response to this item.


Employees

As of December 31, 1998, the Company and its subsidiaries had approximately 
2,271 full-time equivalent employees.  The Company considers its and its 
subsidiaries' employee relations to be good.  None of the employees are 
covered by a collective bargaining agreement.


Certain Statistical Information Regarding the Company

Certain financial and statistical information relative to the Company as 
required under the Securities and Exchange Commission's Industry Guide 3, 
"Statistical Disclosure By Bank Holding Companies," and related discussion is 
incorporated by specific references to portions of the Company's 1998 Annual 
Report Supplement as indicated below.

<TABLE>
<CAPTION>
                                                Page in 1998 Annual
                                                 Report Supplement*

<S>                                                    <C> 
    Net Interest Income; Average Balance Sheets
      and Related Yields and Rates; Volume and
      Rate Variance Analysis ........................    S-8-10
    Securities ......................................   S-17-18
    Loan Portfolio; Risk Elements in Loan Portfolio..   S-13-15
    Summary of Credit Loss Experience ...............   S-16-17
    Deposits ........................................      S-18
    Financial Ratios ................................       S-6
</TABLE>

* Incorporated by reference from the indicated pages of the Company's 1998 
Annual Report Supplement.


                                      7
<PAGE>   8


Item 2.  PROPERTIES

The Company's executive offices are located in Bowling Green, Ohio.  The bank 
subsidiaries operate 156 banking centers, the majority of which are owned, 
with the remaining banking centers under lease agreements, including 13 leased 
from Bancsites, Inc. (Bancsites) under long-term lease agreements.  Bancsites 
was a wholly-owned subsidiary of Mid Am Bank until 1977, when Mid Am Bank
distributed all shares of Bancsites to its shareholders.  Certain senior 
management officials of Bancsites also serve as senior management officials of 
Mid Am Bank.  Also, the information contained in Note 5 "Bank Premises and 
Equipment" on page S-40 of the Company's 1998 Annual Report Supplement is
incorporated herein by reference in response to this item.


Item 3.  LEGAL PROCEEDINGS

The information contained in Note 16 "Contingencies" on page S-50 of the 
Company's 1998 Annual Report Supplement is incorporated herein by reference  
in response to this item.


Item 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

On October 1, 1998, at a Special Meeting of Shareholders of the Company, 
shareholders took the following actions:

   1.  Approved and adopted the Amended and Restated Agreement and Plan of
       Merger, dated as of August 5, 1998, between Bancshares and Mid Am,
       pursuant to which Bancshares and Mid Am would be combined in a merger
       of equals transaction:  13,924,707 votes cast for, 569,584 votes cast
       against, 289,736 votes withheld.

   2.  Amended the Bancshares Articles of Incorporation to repeal the control
       share acquisition provision set forth in Article Sixth thereof:
       13,562,784 votes cast for, 755,152 votes cast against, 466,091 votes
       withheld.

   3.  Approved and adopted the Amended and Restated 1998 Non-Statutory Stock
       Option Plan for Non-Employee Directors:  12,479,795 votes cast for,
       1,890,499 votes cast against, 413,733 votes withheld.

   4.  Approved and adopted the 1998 Stock Option Plan for Employees:
       13,376,499 votes cast for, 988,102 votes cast against, 419,426 votes
       withheld.


                                      8
<PAGE>   9


PART II


Item 5.  MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED
           SHAREHOLDER MATTERS

The information contained under the caption "SHAREHOLDER INFORMATION" on page 
S-3 and the information contained in Note 19 "Regulatory Matters" on pages   
S-51 through S-53 of the Company's 1998 Annual Report Supplement is 
incorporated herein by reference in response to this item.  The Company's 
common stock is traded on the NASDAQ National Market System under the symbol 
"SKYF."  At February 28, 1999, there were approximately 17,993 holders of 
record of the Company's common stock.


Item 6.  SELECTED FINANCIAL DATA

The information contained under the caption "SKY FINANCIAL GROUP, INC. SUMMARY
OF FINANCIAL DATA" on page S-6 of the Company's 1998 Annual Report Supplement 
is incorporated herein by reference in response to this item.


Item 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
           AND RESULTS OF OPERATIONS

The information contained under the caption "MANAGEMENT'S DISCUSSION AND 
ANALYSIS AND STATISTICAL INFORMATION" on pages S-7 through S-24 of the 
Company's 1998 Annual Report Supplement is incorporated herein by reference in 
response to this item.


Item 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The information contained under the caption " MANAGEMENT'S DISCUSSION AND
ANALYSIS AND STATISTICAL INFORMATION" on pages S-22 and S-23 of the
Company's 1998 Annual Report Supplement is incorporated herein by reference in
response to this item.


Item 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The information contained under the caption "SKY FINANCIAL GROUP, INC.
SELECTED QUARTERLY DATA" on page S-5 and the audited financial statements 
contained on pages S-25 through S-56 of the Company's 1998 Annual Report 
Supplement is incorporated herein by reference in response to this item. 

With the exception of the aforementioned information and the information 
incorporated in Items 5, 6, 7 and 14, the Company's 1998 Annual Report 
Supplement to Shareholders is not to be deemed filed as part of this report.


Item 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON  ACCOUNTING
           AND FINANCIAL DISCLOSURE

Not applicable.

                                      9
<PAGE>   10


PART III


Item 10.  DIRECTORS AND EXECUTIVE OFFICERS OF REGISTRANT

The information contained under the captions "ELECTION OF DIRECTORS" on pages 
1 through 4 and "SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE" on 
page 17 of the Company's 1999 Proxy Statement filed with the Securities and 
Exchange Commission on March 10, 1999, is incorporated herein by reference in 
response to this item.

The following table sets forth the names and ages and business experience of 
each of the executive officers of the Company. Each executive officer of the 
Company is appointed by the Board of Directors on an annual basis, and serves 
at the pleasure of the Board.

<TABLE>
<CAPTION>

                           Position With Company or          Officer
Executive Officer    Age   Subsidiary and Experience          Since*


<S>                  <C>   <C>                                 <C> 
David R. Francisco    52   Chairman and Chief Executive        1970
                           Officer of the Company;
                           formerly President and Chief
                           Operating Officer of Mid Am

Marty E. Adams        46   President and Chief Operating       1977
                           Officer of the Company;
                           formerly Vice Chairman of the
                           Board, President and Chief
                           Executive Officer of Bancshares
                           and Citizens

Frank J. Koch         45   Executive Vice President and        1988
                           Senior Credit Officer of the
                           Company; formerly Executive
                           Vice President of Bancshares

W. Granger Souder     38   Executive Vice President and        1989
                           General Counsel of the Company;
                           formerly Executive Vice President
                           and General Counsel of Mid Am;
                           formerly employed as a securities
                           attorney in private practice

Kevin T. Thompson     45   Executive Vice President and        1998
                           Chief Financial Officer of the
                           Company; formerly Senior Vice
                           President/Controller of First
                           of America Bank Corporation

James F. Burwell      48   Chief Operating Officer of Ohio     1980
                           Bank; formerly President and
                           Chief Executive Officer of First
                           National; formerly President and
                           Chief Operating Officer of First
                           National
</TABLE>

                                     10

<PAGE>   11


<TABLE>
<S>                  <C>   <C>                                 <C> 
Jack W. Donaldson     58   President and Chief Executive       1981
                           Officer of Ohio Bank; formerly
                           Executive Vice President and Chief
                           Operating Officer of Ohio Bank

Richard L. Hardgrove  60   President and Chief Executive       1998
                           Officer of Citizens; formerly
                           Deputy Superintendent of the
                           Ohio Division of Financial
                           Institutions; formerly  Chief
                           Operating Officer of First
                           Bancorporation

Patrick A. Kennedy    52   President and Chief Executive       1981
                           Officer of Mid Am Bank; formerly
                           Executive Vice President/Lending
                           of Mid Am Bank; formerly Senior
                           Vice President/Lending of
                           First National

</TABLE>


* Includes period in which executive officer was an officer of a subsidiary or 
acquired company.


Item 11.  EXECUTIVE COMPENSATION

The information contained under the captions "COMPENSATION COMMITTEE REPORT  
ON EXECUTIVE COMPENSATION" and "EXECUTIVE COMPENSATION" on pages 8 through 17 
of the Company's 1999 Proxy Statement filed with the Securities and Exchange 
Commission on March 10, 1999, is incorporated herein by reference in response 
to this item.


Item 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
            AND MANAGEMENT

The information contained under the captions "ELECTION OF DIRECTORS" on pages 
1 through 4, "BENEFICIAL OWNERSHIP OF THE COMPANY'S COMMON STOCK" on pages 6 
through 8 and "EXECUTIVE COMPENSATION" on pages 12 through 17 of the Company's 
1999 Proxy Statement filed with the Securities and Exchange Commission on 
March 10, 1999, is incorporated herein by reference in response to this item.

The Company has no knowledge of any person or any group (as defined in Section 
13.d.3 of the Securities Exchange Act of 1934) which owns in excess of five 
percent of the outstanding common stock of the Company.


Item 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The information contained under the caption "CERTAIN TRANSACTIONS" on page   
17 of the Company's 1999 Proxy Statement filed with the Securities and 
Exchange Commission on March 10, 1999, is incorporated herein by reference in 
response to this item.

                                     11
<PAGE>   12



PART IV


Item 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND 
            REPORTS ON FORM 8-K

(a) The following documents are filed as part of this report:

                                                Page in 1998 Annual
                                                 Report Supplement*
(1) Financial Statements:
    Report of Independent Auditors ..................     S-25
    Consolidated Balance Sheets at
      December 31, 1998 and 1997 ....................     S-26
    Consolidated Statements of Income for
      the three years ended December 31, 1998 .......     S-27
    Consolidated Statements of Changes in
      Shareholders' Equity for the three years
      ended December 31, 1998 .......................     S-28
    Consolidated Statements of Comprehensive Income
      for the three years ended December 31, 1998 ...     S-29
    Consolidated Statements of Cash Flows for
      the three years ended December 31, 1998 .......     S-30
    Notes to Consolidated Financial Statements ......   S-31-56

* Incorporated by reference from the indicated pages of the 1998 Annual Report 
Supplement.  All schedules are omitted because they are not applicable or the 
required information is shown in the financial statements or notes thereto.


The following Exhibits required by Item 601 of Regulation S-K are filed as part 
of this report:

Exhibit
Number             Exhibit

2.1    Agreement and Plan of Merger dated as of December 14, 1998 by and between
          Sky Financial Group, Inc. and First Western Bancorp, Inc.
2.2    Agreement and Plan of Merger dated as of December 16, 1998 by and between
          Sky Financial Group, Inc, and Wood Bancorp, Inc.
3.1    Company's Fifth Amended Articles of Incorporation
3.2    Amendment to the Fifth Amended Articles of Incorporation of the Company
3.3    Company's Code of Regulations, as amended
3.4    Amendment to the Code of Regulations of the Company
4.1    Shareholder Rights Agreement dated as of July 21, 1998, between the 
          Company and The Citizens Banking Company, as Rights Agent
10.1   The Company's Amended and Restated 1998 Stock Option Plan for Nonemployee
          Directors
10.2   The Company's 1998 Stock Option Plan for Employees
10.3   Sky Financial Group, Inc. Non-Qualified Retirement Plan
10.4   Stock Option Agreement effective as of December 15, 1998, by and between
          Sky Financial Group, Inc. and First Western Bancorp, Inc.
10.5   Stock Option Agreement dated as of December 16, 1998, by and between Sky
          Financial Group, Inc. and Wood Bancorp, Inc.
10.6   Form of Indemnification Agreement between the Company and individual
          directors, certain officers and representatives.




                                     12
<PAGE>   13
10.7   Employment Agreement between the Company and David R. Francisco
10.8   Employment Agreement between the Company and Marty E. Adams
10.9   Letter agreement between the Company and Jack W. Donaldson dated December
          22, 1998.
10.10  Employment Agreement by and among the Company, The Citizens Banking
          Company, Century National Bank and Trust Company and Joseph N. Tosh, 
          II
10.11  Agreement by and among the Company, The Citizens Banking Company and 
          Frank J. Koch.
10.12  Form of Change in Control Agreement between the Company and certain
          officers of the Company.
11.1   Statement Re: Computation of Per Share Earnings
13     The Company's 1998 Annual Report Supplement
18.0   Change in Accounting Principle
20.1   The Company's Proxy Statement dated March 19, 1999 for its 1999 Annual 
          Meeting
21.1   Subsidiaries of the Company
23.1   Consent of Independent Auditors
24.1   Power of Attorney
27.1   Financial Data Schedule (1998)
27.2   Financial Data Schedule (1997)
27.3   Financial Data Schedule (1996)

(b) Reports on Form 8-K
On October 15, 1998, the Company filed a current report on Form 8-K regarding 
the October 2, 1998 consummation of the merger of Mid Am, Inc. into Citizens 
Bancshares, Inc., the change of Bancshares' name to Sky Financial Group, Inc. 
and the reporting of financial statements and related information giving 
effect to the merger.

On October 16, 1998, the Company filed a current report on Form 8-K regarding 
the October 2, 1998 consummation of the merger of Mid Am, Inc. into Citizens 
Bancshares, Inc., and the reauthorization by the Board of Directors of the 
Company's common stock repurchase plan.

On December 14, 1998, the Company filed a current report on Form 8-K regarding 
the announcement of the Company and First Western Bancorp, Inc. signing a 
definitive agreement to merge.

On December 21, 1998, the Company filed a current report on Form 8-K regarding 
the December 4, 1998 completion of its affiliation of The Ohio Bank.

On December 28, 1998, the Company filed a current report on Form 8-K regarding 
the December 17, 1998 announcement of the Company and Wood Bancorp, Inc. 
signing a definitive agreement to merge.



                                     13
<PAGE>   14




                               SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange 
Act of 1934, the registrant has duly caused this report to be signed on its 
behalf by the undersigned, thereunto duly authorized.

                          SKY FINANCIAL GROUP, INC.                
    
                          BY:  /s/ Kevin T. Thompson
                      
                          Kevin T. Thompson
                          Executive Vice President and
                             Chief Financial Officer

                          March 15, 1999


Pursuant to the requirement of the Securities Exchange Act of 1934, this 
report has been signed below by the following persons on behalf of the 
Registrant and in the capacities and on the date indicated.

                              Signatures
     
        
David R. Francisco      Director/Chairman/C.E.O.

       *                              
Marty E. Adams          Director/President/C.O.O.    March 1, 1999

                                     
Kevin T. Thompson       Exec. Vice Pres./C.F.O.

       *                   
Gerald D. Aller                Director              March 1, 1999

       *                   
David A. Bryan                 Director              March 1, 1999

       *             
Keith D. Burgett               Director              March 1, 1999

       *                   
George N. Chandler, II         Director              March 1, 1999

       *
Willard L. Davis               Director              March 1, 1999

       *                                     
Del E. Goedeker                Director              March 1, 1999

       *
D. James Hilliker              Director              March 1, 1999

       * 
Richard R. Hollington, Jr.     Director              March 1, 1999


                                     14

<PAGE>   15


       * 
Fred H. Johnson, III           Director              March 1, 1999

       *
H. Lee Kinney                  Director              March 1, 1999

       *
Marilyn O. McAlear             Director              March 1, 1999

       *
James C. McBane                Director              March 1, 1999

       *
Kenneth E. McConnell           Director              March 1, 1999

       *
Gerard P. Mastroianni          Director              March 1, 1999

       *
Thomas S. Noneman              Director              March 1, 1999

       *
Edward J. Reiter               Director              March 1, 1999

       *
Patrick W. Rooney              Director              March 1, 1999

       *
Emerson J. Ross,Jr.            Director              March 1, 1999

       *
Douglas J. Shierson            Director              March 1, 1999

       *
C. Gregory Spangler            Director              March 1, 1999

       * 
Robert E. Stearns              Director              March 1, 1999

       *
Glenn F. Thorne                Director              March 1, 1999

       *
Joseph N. Tosh, II             Director              March 1, 1999

                    
* The undersigned attorney-in-fact, by signing his name below, does hereby 
sign this Report on Form 10-K on behalf of the above-named officers and 
directors pursuant to a power of attorney executed by such persons and filed 
with the Securities and Exchange Commission contemporaneously herewith.

                          BY:  /s/ Kevin T. Thompson
                       
                          Kevin T. Thompson
                          Attorney-In-Fact


                                     15
<PAGE>   16



                                 FORM 10-K

                               EXHIBIT INDEX


Exhibit
Number              Exhibit

  2.1   Agreement and Plan of Merger dated as of December 14, 1998 by and
           between Sky Financial Group, Inc. and First Western Bancorp, Inc.
          (incorporated by reference to Exhibit 2 to the Form 8-K of the
           Company filed with the Securities and Exchange Commission as of
           December 14, 1998). 
  2.2   Agreement and Plan of Merger dated as of December 16, 1998 by and
           between Sky Financial Group, Inc. and Wood Bancorp, Inc.
          (incorporated by reference to Exhibit 2 to the Form 8-K of the
           Company filed with the Securities and Exchange Commission as of
           December 28, 1998).
  3.1   Company's Fifth Amended Articles of Incorporation
          (incorporated by reference to Exhibit 3.1 of Form S-4 Registration
           Statement No. 333-60741 of the Company).
  3.2   Amendment to the Fifth Amended Articles of Incorporation of the
           Company   (incorporated by reference to Appendix B of the Joint
           Proxy Statement/Prospectus in Form S-4 Registration Statement
           No. 333-60741 of the Company).
  3.3   Company's Code of Regulations, as amended
          (incorporated by reference to Exhibit 3(2) of Form S-4 Registration
           Statement No. 0-18209 of the Company).
  3.4   Amendment to the Code of Regulations of the Company
          (incorporated by reference to Appendix C of the Joint Proxy
           Statement/Prospectus in Form S-4 Registration Statement
           No. 333-60741 of the Company).
  4.1   Shareholder Rights Agreement dated as of July 21, 1998, between the
           Company and The Citizens Banking Company, as Rights Agent
          (incorporated by reference to Exhibit 4 of Form S-4 Registration
           Statement No. 333-60741 of the Company).
 10.1   The Company's Amended and Restated 1998 Stock Option Plan for
           Nonemployee Directors
          (incorporated by reference to Appendix G of the Joint Proxy
           Statement/Prospectus in Form S-4 Registration Statement
           No. 333-60741 of the Company).
 10.2   The Company's 1998 Stock Option Plan for Employees
          (incorporated by reference to Appendix H of the Joint Proxy
           Statement/Prospectus in Form S-4 Registration Statement
           No. 333-60741 of the Company).
 10.3   Sky Financial Group, Inc. Non-Qualified Retirement Plan
          (As Amended and Restated Effective January 1, 1999).
 10.4   Stock Option Agreement effective as of December 15, 1998, by and
           between Sky Financial Group, Inc. and First Western Bancorp, Inc.
          (incorporated by reference to Exhibit 99 of Schedule 13D filed
           by the Company as of December 24, 1998).
 10.5   Stock Option Agreement dated as of December 16, 1998, by and
           between Sky Financial Group, Inc. and Wood Bancorp, Inc.
          (incorporated by reference to Exhibit B of Schedule 13D filed
           by the Company as of December 28, 1998).


                                     16
<PAGE>   17


 Exhibit Index  (continued)


 10.6   Form of Indemnification Agreement between the Company and
           individual directors, certain officers and representatives.
 10.7   Employment Agreement between the Company and David R. Francisco
          (incorporated by reference to Exhibit 10.2 of Form S-4
           Registration Statement No. 333-60741 of the Company).
 10.8   Employment Agreement between the Company and Marty E. Adams
          (incorporated by reference to Exhibit 10.3 of Form S-4
           Registration Statement No. 333-60741 of the Company).
 10.9   Letter agreement between the Company and Jack W. Donaldson dated
           December 22, 1998.
 10.10  Employment Agreement by and among the Company, The Citizens Banking
           Company, Century National Bank and Trust Company and
           Joseph N. Tosh, II
          (incorporated by reference to Exhibit 10(18) of the Form 10-Q
           of the Company for the quarter ended June 30, 1998).
 10.11  Agreement by and among the Company, The Citizens Banking Company
           and Frank J. Koch.
 10.12  Form of Change in Control Agreement between the Company and certain
           officers of the Company.
 11.1   Statement Re:  Computation of Per Share Earnings
          (incorporated by reference from the information contained in
           Note 10 "Earnings Per Share" on page S-44 of the Company's
           1998 Annual Report Supplement).  See Exhibit 13.1
 13     The Company's 1998 Annual Report Supplement
          (except for the portions of the report expressly incorporated
           by reference, the report is furnished solely for the information
           of the Commission and is not deemed "filed" as part hereof).
 18.0   Change in Accounting Principle
          (incorporated by reference from the information contained in
           Note 1 "Summary of Significant Accounting Policies" on
           pages S-31 through S-35 of the Company's 1998 Annual Report
           Supplement).  See Exhibit 13.1
 20.1   The Company's Proxy Statement for its 1999 Annual Meeting
          (incorporated by reference from the information contained in
           the Company's 1999 Proxy Statement filed with the Securities
           and Exchange Commission on March 10, 1999).
 21.1   Subsidiaries of the Company
 23.1   Consent of Independent Accountants
 24.1   Power of Attorney
 27.1   Financial Data Schedule (1998)
 27.2   Financial Data Schedule (1997)
 27.3   Financial Data Schedule (1996)




                                     17

<PAGE>   1
                                                                    EXHIBIT 10.3



















             SKY FINANCIAL GROUP, INC. NON-QUALIFIED RETIREMENT PLAN


               (AS AMENDED AND RESTATED EFFECTIVE JANUARY 1, 1999)




<PAGE>   2



                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
ARTICLE I
<S>               <C>                                                                          <C>
         DEFINITIONS............................................................................1
         1.1.     "Account".....................................................................1
         1.2.     "Affiliated Company"..........................................................1
         1.3.     "Board".......................................................................1
         1.4.     "Bonus".......................................................................2
         1.5.     "Change in Control"...........................................................2
         1.6.     "Code"........................................................................3
         1.7.     "Committee"...................................................................3
         1.8.     "Company".....................................................................3
         1.9.     "Company Stock Fund"..........................................................3
         1.10.    "Compensation"................................................................3
         1.11.    "Compensation Deferral Account"...............................................3
         1.12.    "Deferral Agreement"..........................................................4
         1.13.    "Deferral Contribution".......................................................4
         1.14.    "Director"....................................................................4
         1.15.    "Director's Fees".............................................................4
         1.16.    "Director's Retainer".........................................................4
         1.17.    "Disability"..................................................................4
         1.18.    "Discretionary Company Contribution"..........................................4
         1.19.    "Discretionary Company Contributions Account".................................4
         1.20.    "Eligible Employee"...........................................................4
         1.21.    "Employer"....................................................................4
         1.22.    "Employment Termination"......................................................4
         1.23.    "Frozen Profit Sharing Account"...............................................4
         1.24.    "Investment Funds"............................................................5
         1.25.    "Participant".................................................................5
         1.26.    "Plan"........................................................................5
         1.27.    "Plan Year"...................................................................5
         1.28.    "Qualified Pension Plan"......................................................5
         1.29.    "Qualified Plans".............................................................5
         1.30.    "Qualified Plan Compensation Deferral Contribution"...........................5
         1.31.    "Qualified Plan Pension Contribution".........................................5
         1.32.    "Qualified Plan Matching Contribution"........................................5
         1.33.    "Qualified Plan Profit Sharing Contribution"..................................5
         1.34.    "Qualified Savings Plan"......................................................5
         1.35.    "Retirement Date".............................................................5
         1.36.    "Rollover Contributions Account"..............................................5
         1.37.    "Salary"......................................................................5
         1.38.    "Stock Option Plan"...........................................................6
         1.39.    "Stock Option Deferral Account"...............................................6
         1.40.    "Supplemental Matching Contribution"..........................................6
         1.41.    "Supplemental Matching Contributions Account".................................6
         1.42.    "Supplemental Pension Contributions Account"..................................6
</TABLE>


                                      -i-
<PAGE>   3

<TABLE>
<S>              <C>                                                                           <C>
         1.43.    "Supplemental Profit Sharing Contribution"....................................6
         1.44.    "Supplemental Profit Sharing Contributions Account"...........................6
         1.45.    "Trust".......................................................................6
         1.46.    "Year of Service".............................................................6

ARTICLE II 
         CONTRIBUTIONS..........................................................................6
         2.1.     Director's Deferral Contributions.............................................6
         2.2.     Eligible Employee's Compensation Deferral Contributions.......................6
         2.3.     Deferral Agreements...........................................................7
         2.4.     Supplemental Matching Contributions...........................................7
         2.5.     Supplemental Profit Sharing Contributions.....................................7
         2.6.     Supplemental Pension Contributions............................................8
         2.7.     Discretionary Company Contributions...........................................8
         2.8.     Rollover Contributions........................................................8
         2.9.     Frozen Profit Sharing Accounts................................................8
         2.10.    Retirement and Severance Payments Made in Connection With the Merger of the 
                  Company and Citizens Bancshares, Inc..........................................8
         2.11.    Supplemental Contributions Made in Connection with 1999 Salary Deferrals......9

ARTICLE III
         DEFERRAL OF STOCK OPTION INCOME........................................................9
         3.1.     Stock Option Deferral Elections...............................................9
         3.2.     Crediting of Stock Units......................................................9
         3.3.     "Stock Units"................................................................10

ARTICLE IV
         VESTING OF PARTICIPANTS' ACCOUNTS.....................................................10
         4.1.     Fully Vested Accounts........................................................10
         4.2.     Supplemental Profit Sharing and Pension Contributions Accounts...............10
         4.3.     Discretionary Company Contributions Account..................................10
         4.4.     Forfeiture Due to Competition or Breach of Confidentiality...................10
         4.5.     Full Vesting Provisions......................................................11
         4.6.     Forfeiture...................................................................11

ARTICLE V
         INVESTMENT OF CONTRIBUTIONS...........................................................11
         5.1.     Investment  of Participants' Accounts........................................11
         5.2.     Adjustment For Investment Earnings...........................................12
         5.3.     Investment of Prior Deferrals................................................12

ARTICLE VI
         DISTRIBUTIONS.........................................................................12
         6.1.     Distribution of Participants' Accounts.......................................12
         6.2.     Form of Distribution.........................................................12
         6.3.     Timing of Distribution.......................................................13

</TABLE>



                                      -ii-
<PAGE>   4

<TABLE>

<S>              <C>                                                                          <C>
         6.4.     Distribution of Insurance Contracts..........................................13
         6.5.     Distributions Upon Death.....................................................13
         6.6.     Hardship Distributions.......................................................14
         6.7.     Tax-Savings Clause...........................................................14

ARTICLE VII
         ADMINISTRATION OF THE PLAN............................................................15
         7.1.     Administration by the Committee..............................................15
         7.2.     Power and Duties of Committee................................................15

ARTICLE VIII 
         AMENDMENT OR TERMINATION..............................................................15
         8.1.     Amendment or Termination.....................................................15
         8.2.     Effect of Amendment or Termination...........................................15

ARTICLE IX
         GENERAL PROVISIONS....................................................................16
         9.1.     Participant's Rights Unsecured...............................................16
         9.2.     Trust Agreement..............................................................16
         9.3.     General Conditions...........................................................16
         9.4.     No Guaranty of Benefits......................................................16
         9.5.     No Enlargement of Employee Rights............................................16
         9.6.     Spendthrift Provision........................................................17
         9.7.     Applicable Law...............................................................17
         9.8.     Incapacity of Recipient......................................................17
         9.9.     Corporate Successors.........................................................17
         9.10.    Unclaimed Benefit............................................................17
         9.11.    Limitations on Liability.....................................................17
         9.12.    Claims Procedure.............................................................17
         9.13.    Gender and Number............................................................18
         9.14.    Indemnification..............................................................18

</TABLE>







                                     - iii-




<PAGE>   5



             SKY FINANCIAL GROUP, INC. NON-QUALIFIED RETIREMENT PLAN
               (As Amended and Restated Effective January 1, 1999)


                  Prior to October 2, 1998, Mid Am, Inc. ("Mid Am") maintained
the Mid Am, Inc. Non-Qualified Retirement Plan (the "Mid Am Plan"). Mid Am
merged into Citizens Bancshares, Inc. effective October 2, 1998 (the "Merger
Date"), with the resulting corporation renamed Sky Financial Group, Inc. (the
"Company"). The Company became the sponsor of the Mid Am Plan on the Merger
Date, and hereby amends and restates the Mid Am Plan effective January 1, 1999
in the form of this Sky Financial Group, Inc. Non-Qualified Retirement Plan (the
"Plan"). On and after the Merger Date, the Plan covers all Directors and
Eligible Employees of the Company.

                  The Plan is designed to ensure that the benefits provided to
Directors and Eligible Employees enhance the overall effectiveness of the
Company's executive compensation program and to attract, retain and motivate
such individuals.

                  Accordingly, the Company hereby adopts the Plan pursuant to
the terms and provisions set forth below:


                                    ARTICLE I
                                   DEFINITIONS

         Wherever used herein the following terms shall have the meanings
hereinafter set forth:

         11.   "Account" means the account maintained under the Plan in a
Participant's name to which all Plan contributions, and earnings and losses
thereon, are credited. A Participant's Account consists of the following
subaccounts:

               (a) for Directors who are Participants, a Compensation Deferral
         Account, a Discretionary Company Contributions Account, a Stock Option
         Deferral Account and a Rollover Contributions Account; and

               (b) for Eligible Employees who are Participants, a Compensation
         Deferral Account, a Supplemental Matching Contributions Account, a
         Supplemental Profit Sharing Contributions Account, a Supplemental
         Pension Contributions Account, a Discretionary Company Contributions
         Account, a Stock Option Deferral Account, a Rollover Contributions
         Account and a Frozen Profit Sharing Account.

         1.2.  "Affiliated Company" means a business entity, or predecessor of
such entity, if any, that is a member of a controlled group of corporations of
which the Company is also a member. The Eligible Employees and Directors of each
Affiliated Company will be covered by the Plan upon approval by the Committee.


         1.3   "Board" means the Board of Directors of the Company.


                                       -1-

<PAGE>   6






         1.4.  "Bonus" means the additional cash remuneration payable to a
Participant annually pursuant to an Employer's performance compensation program
or any other plan, program or arrangement under which an Employer pays an amount
of cash remuneration to a Participant above such Participant's Salary, prior to
any Deferral Contributions under this Plan.

         1.5.  "Change in Control" means any one or more of the following
events:

               (a) Individuals who constitute the Board immediately after the
         Merger Date (the "Incumbent Directors") cease for any reason to
         constitute at least a majority of the Board, provided that any person
         becoming a Director subsequent thereto whose election or nomination for
         election was approved by a vote of at least two-thirds of the Incumbent
         Directors then on the Board (either by a specific vote or by approval
         of the proxy statement of the Company in which such person is named as
         a nominee for Director, without written objection to such nomination)
         shall be an Incumbent Director, provided, however, that no individual
         initially elected or nominated as a Director of the Company as a result
         of an actual or threatened election contest with respect to Directors
         or as a result of any other actual or threatened solicitation of
         proxies or consents by or on behalf of any person other than the Board
         shall be deemed to be an Incumbent Director;

               (b) Any "person" (as such term is defined in Section 3(a)(9) of
         the Securities Exchange Act of 1934 (the "1934 Act") and as used in
         Sections 13(d)(3) and 14(d)(2) of the 1934 Act) is or becomes a
         "beneficial owner" (as defined in Rule 13d-3 under the 1934 Act),
         directly or indirectly, of securities of the Company representing
         twenty-five percent (25%) or more of the combined voting power of the
         Company's then outstanding securities eligible to vote for the election
         of the Board (the "Company Voting Securities"); provided, however, that
         the event described in this Section 1.5(b) shall not be deemed to be a
         Change in Control by virtue of any of the following acquisitions: (i)
         by the Company or any subsidiary, (ii) by any employee benefit plan (or
         related trust) sponsored or maintained by the Company or any subsidiary
         or (iii) by any underwriter temporarily holding securities pursuant to
         an offering of such securities;

               (c) The consummation of a merger, consolidation, statutory share
         exchange or similar form of corporate transaction involving the Company
         or any of its subsidiaries that requires the approval of the Company's
         stockholders, whether for such transaction or the issuance of
         securities in the transaction (a "Business Combination"), unless
         immediately following such Business Combination: (i) more than sixty
         percent (60%) of the total voting power of (x) the company resulting
         from such Business Combination (the "Surviving Company"), or (y) if
         applicable, the ultimate parent company that directly or indirectly has
         beneficial ownership of one hundred percent (100%) of the voting
         securities eligible to elect directors of the Surviving Company (the
         "Parent Company"), is represented by Company Voting Securities that
         were outstanding immediately prior to such Business Combination (or, if
         applicable, is represented by shares into which such Company Voting
         Securities were converted pursuant to such Business Combination), and
         such voting power among the holders thereof is in substantially the
         same proportion as the voting power of such Company voting Securities
         among the holders thereof immediately prior to the Business
         Combination; (ii) no person (other than any employee benefit plan (or
         related trust) sponsored or

                                       -2-

<PAGE>   7


         maintained by the Surviving Company or the Parent Company), is or
         becomes the beneficial owner, directly or indirectly, of twenty-five
         percent (25%) or more of the total voting power of the outstanding
         voting securities eligible to elect directors of the Parent Company
         (or, if there is no Parent Company, the Surviving Company); and (iii)
         at least fifty percent (50%) of the members of the board of directors
         of the Parent Company (of, if there is no Parent Company, the Surviving
         Company) following the consummation of the Business Combination were
         Incumbent Directors at the time of the Board of Directors' approval of
         the execution of the initial agreement providing for such Business
         Combination; or

               (d) The stockholders of the Company approve a plan of complete
         liquidation or dissolution of the Company or a sale of all or
         substantially all of the Company's assets or deposits.

         Notwithstanding the foregoing, a Change in Control of the Company shall
not be deemed to occur solely because any person acquires beneficial ownership
of more than twenty-five percent (25%) of the Company Voting Securities as a
result of the acquisition of Company Voting Securities by the Company which
reduces the number of Company Voting Securities outstanding; provided, however,
that if after such acquisition by the Company such person becomes the beneficial
owner of additional Company Voting Securities that increases the percentage of
outstanding Company Voting Securities beneficially owned by such person, a
Change in Control of the Company shall then occur.

         1.6.  "Code" means the Internal Revenue Code of 1986, as amended from
time to time, and any regulations relating thereto.

         1.7.  "Committee" means the Mid Am, Inc. Non-Qualified Plan Committee
that is responsible for the administration of the Plan.

         1.8.  "Company" means Sky Financial Group, Inc., an Ohio corporation,
or, to the extent provided in Section 9.9 below, any successor corporation or
other entity resulting from a merger or consolidation into or with the Company
or a transfer or sale of substantially all of the assets of the Company.

         1.9.  "Company Stock Fund" means the Investment Fund maintained under
the Trust that is invested solely in shares of the Company's common stock.

         1.10. "Compensation" means a Participant's Salary, Bonus, Director's
Fees or Director's Retainer payable in any calendar year. Except as required by
applicable law, Compensation deferrals elected under this Plan shall not affect
the determination of Compensation or earnings for purposes of any other plan,
policy or program maintained by the Company or an Affiliated Company.

         1.11. "Compensation Deferral Account" means the account established for
a Participant under the Plan that is credited with Deferral Contributions under
Sections 3.1 and 3.2 of the Plan.

         1.12. "Deferral Agreement" means the written deferral agreement entered
into by a Participant with the Company pursuant to the terms of Sections 3.1 or
3.2 of the Plan.

                                       3
<PAGE>   8

         1.13. "Deferral Contribution" means the elective deferral contribution
credited to a Participant's Account under the Plan by the Company.

         1.14. "Director" means an individual who is a member of the Board or a
member of the board of directors of an Affiliated Company. Neither "Advisory
board members" nor employees of an Employer shall be considered Directors under
the Plan.

         1.15. "Director's Fees" means the Board meeting and Board committee
meeting fees paid to a Director by the Employer.

         1.16. "Director's Retainer" means the annual retainer paid to a
Director by the Employer.

         1.17. "Disability" means a Participant is under the regular care of a
doctor and prevented by a medically determinable physical or mental impairment
from performing each of the material duties of his or her regular occupation.
Determinations of Disability are made by the Committee in its sole discretion.

         1.18. "Discretionary Company Contribution" means a discretionary
company contribution made by the Company on behalf of one or more Participants
under the terms of the Plan.

         1.19. "Discretionary Company Contributions Account" means the account
established for a Participant under the Plan that is credited with Discretionary
Company Contributions under Section 2.7 of the Plan.

         1.20. "Eligible Employee" means each employee of an Employer who is:
(i) classified as a senior vice-president or higher; (ii) a commissioned
salesperson whom the Committee expects to earn at least $100,000 in commissions
per year; or (iii) designated by the Committee as an Eligible Employee.

         1.21. "Employer" means the Company and any Affiliated Company that is
approved by the Committee.

         1.22. "Employment Termination" means the date of (i) an Eligible
Employee's termination of employment with the Employer, or (ii) a Director's
termination of service as a Director, and shall include such termination for any
reason, unless expressly indicated otherwise. A Participant's termination of
service as a director of the Company in connection with the Merger, for which
the Participant receives Severance Payments, will be treated as an Employment
Termination for purposes of Article VI of the Plan.

         1.23. "Frozen Profit Sharing Account" means the account established for
a Participant under the Plan to which the Participant's balance in his or her
Supplemental Profit Sharing Contributions Account on December 31, 1998 was
transferred, in accordance with Section 2.9 of the Plan.

         1.24. "Investment Funds" means the various investment funds established
and maintained under the Trust.



                                       4
<PAGE>   9

         1.25. "Participant" means a Director or an Eligible Employee who is
eligible for participation and who has completed all necessary election and
enrollment forms provided by the Committee.

         1.26. "Plan" means the Mid Am, Inc. Non-Qualified Retirement Plan, as
set forth herein and as hereinafter amended from time to time.

         1.27. "Plan Year" means the 12-month period beginning on January 1 and
ending on the following December 31 of each year.

         1.28. "Qualified Pension Plan" means the Mid Am, Inc. Employee Stock
Ownership Pension Plan, as amended from time to time, and any successor or 
replacement plan.

         1.29. "Qualified Plans" mean the Qualified Savings Plan and the
Qualified Pension Plan. Except as otherwise provided in this Article I, all
defined terms used in the Plan that are defined in the Qualified Plans shall
have the same meaning in the Plan as is set forth in the Qualified Plans.

         1.30. "Qualified Plan Compensation Deferral Contribution" means the
elective salary reduction contribution made by the Company for the benefit of a
Participant under the terms of the Qualified Savings Plan in any Plan Year.

         1.31. "Qualified Plan Pension Contribution" means the employer
contribution credited by the Company for the benefit of a Participant under the
terms of the Qualified Pension Plan.

         1.32. "Qualified Plan Matching Contribution" means the matching
contribution made by the Company for the benefit of a Participant under the
terms of the Qualified Savings Plan.

         1.33. "Qualified Plan Profit Sharing Contribution" means the profit
sharing contribution made by the Company for the benefit of a Participant under
the terms of the Qualified Savings Plan.

         1.34. "Qualified Savings Plan" means the Mid Am, Inc. Employee Stock
Ownership and Savings Plan, and any successor or replacement plan.

         1.35. "Retirement Date" means the first day of the calendar month
coincident with or next following the date on which the Participant attains age
sixty-five (65) years.

         1.36. "Rollover Contributions Account" means the account established
for a Participant under the Plan that is credited with Rollover Contributions
under Section 2.8 of the Plan.

         1.37. "Salary" means a Participant's annual base salary rate for the
Plan Year, as specified by the Employer, prior to any Deferral Contributions
under this Plan.

         1.38. "Stock Option Plan" means each of the Mid Am, Inc. 1992 Stock
Option Plan, the 1997 Mid Am, Inc. Stock Option Plan, and such other stock 
option plans as may be adopted by the Company, each as amended from time to 
time.



                                       -5-
<PAGE>   10

         1.39. "Stock Option Deferral Account" means the account established for
a Participant under the Plan that is credited with Stock Option Deferral Amounts
under Section 3.1 of the Plan.

         1.40. "Supplemental Matching Contribution" means the matching
contribution credited by the Company for the benefit of a Participant under the
terms of the Plan.

         1.41. "Supplemental Matching Contributions Account" means the account
established for a Participant under the Plan that is credited with Supplemental
Matching Contributions under Section 2.4 of the Plan.

         1.42. "Supplemental Pension Contributions Account" means the account
established for a Participant under the Plan that is credited with Supplemental
Pension Contributions under Section 2.6 of the Plan.

         1.43. "Supplemental Profit Sharing Contribution" means the profit
sharing contribution credited by the Company for the benefit of a Participant
under the terms of the Plan in any Plan Year.

         1.44. "Supplemental Profit Sharing Contributions Account" means the
account established for a Participant under the Plan that is credited with
Supplemental Profit Sharing Contributions under Section 2.5 of the Plan.

         1.45. "Trust" means a trust agreement entered into by the Company under
which the Company makes contributions for the purpose of accumulating assets to
assist the Employers in fulfilling their obligations to Participants hereunder.

         1.46. "Year of Service" means each 12-consecutive month period of an
Eligible Employee's continuous employment, or a Director's continuous service,
with an Employer.


                                   ARTICLE II
                                  CONTRIBUTIONS

         2.1.  Director's Deferral Contributions. A Participant who is a
Director may elect to defer a whole percentage (up to100 percent) of the
Director's Fees otherwise payable to him or her by the Employer for a Plan Year.
A Participant who is a Director also may elect to defer a whole percentage (up
to 100 percent) of the Director's Retainer otherwise payable to him or her by
the Employer for a Plan Year. The amount deferred pursuant to this Section shall
be a Director's Deferral Contribution credited to the Director's Compensation
Deferral Account.

         2.2.  Eligible Employee's Compensation Deferral Contributions. A
Participant who is an Eligible Employee may elect to defer a whole percentage
(up to 100 percent) of the Bonus otherwise payable to him or her by the Employer
for a Plan Year. A Participant who is an Eligible Employee also may elect to
defer a whole percentage (up to 50 percent) of the Salary otherwise payable to
him or her by the Employer for a Plan Year. The amount deferred pursuant to this
Section shall be credited to the Participant's Compensation Deferral Account.



                                      -6-
<PAGE>   11

         2.3.  Deferral Agreements. As a condition to the Company's obligation
to credit any Deferral Contribution for the benefit of a Participant pursuant to
Sections 3.1 or 3.2, the Participant must execute a Compensation Deferral
Agreement. Except as provided below, a Participant's Deferral Agreement for any
Plan Year must be in writing, signed by the Participant, and delivered to the
Committee prior to January 1 of that Plan Year. A Participant's Deferral
Agreement will remain in full force and effect for subsequent Plan Years unless
and until revoked by a Participant by written instrument delivered to the
Committee prior to the beginning of the Plan Year in which such revocation is to
be effective.

         Neither Eligible Employees nor Directors are required to elect Deferral
Contributions in any Plan Year. However, the minimum amount of Deferral
Contribution for any Plan Year for which a Deferral Agreement is executed is
$1,000.

         2.4.  Supplemental Matching Contributions. Each Plan Year, the Company
will credit a Supplemental Matching Contribution to the Plan on behalf of each
Participant in an amount equal to the difference between (a) and (b) below:

                  (a) the Qualified Plan Matching Contribution that would have
         been made on behalf of the Participant for the Plan Year in which an
         amount is deferred by the Participant pursuant to Section 3.2, based on
         the Participant's Compensation prior to any Deferral Contributions
         under this Plan, and without giving effect to any reductions required
         by the limitations imposed by the Code on the Qualified Savings Plan;
         and

                  (b) the amount of the Qualified Plan Matching Contribution
         actually made on behalf of the Participant for the Plan Year.

All Supplemental Matching Contributions shall be credited to the Supplemental
Matching Contributions Account maintained for the Participant.

         2.5.     Supplemental Profit Sharing Contributions. Each Plan Year, the
Company will credit a Supplemental Profit Sharing Contribution to the Plan on
behalf of each Participant in an amount equal to the difference between (a) and
(b) below:

                  (a) The Qualified Plan Profit Sharing Contribution that would
         have been made on behalf of the Participant for the Plan Year, based on
         the Participant's Compensation prior to any Deferral Contributions
         under this Plan, and without giving effect to any reductions required
         by the limitations imposed by the Code on the Qualified Savings Plan;
         and

                  (b) The amount of the Qualified Plan Profit Sharing
         Contribution actually made on behalf of the Participant for the Plan
         Year.

All Supplemental Profit Sharing Contributions shall be credited to the
Supplemental Profit Sharing Contributions Account maintained for the
Participant.



                                      -7-
<PAGE>   12

         2.6. Supplemental Pension Contributions. Each Plan Year, the Company
will credit a Supplemental Pension Contribution to the Plan on behalf of each
Participant in an amount equal to the difference between (a) and (b) below:

                  (a) The Qualified Plan Pension Contribution that would have
         been made on behalf of the Participant for the Plan Year, based on the
         Participant's Compensation prior to any Deferral Contributions under
         this Plan, and without giving effect to any reductions required by the
         limitations imposed by the Code on the Qualified Pension Plan; and

                  (b) The amount of the Qualified Plan Pension Contribution
         actually made on behalf of the Participant for the Plan Year.

All Supplemental Pension Contributions shall be credited to the Supplemental
Pension Contributions Account maintained for the Participant.

         2.7. Discretionary Company Contributions. The Company may in its sole
discretion contribute to the Account of a Participant an amount that it may from
time to time deem advisable. Such discretionary contributions shall be credited
to the Discretionary Company Contributions Account maintained for the
Participant.

         2.8.  Rollover Contributions. The Committee may, in its sole
discretion, accept transfers on behalf of a Participant from any non-qualified
plan or arrangement in which such Participant participated. The Committee shall
not accept such transfer to the extent that any amount is subject to current
income taxation. Transferred amounts shall be credited to the Rollover
Contributions Account maintained for the Participant.

         2.9.  Frozen Profit Sharing Accounts. On December 31, 1998, the entire
balance of a Participant's Supplemental Profit Sharing Contributions Account
was transferred to the Participant's Frozen Profit Sharing Account.

         2.10. Retirement and Severance Payments Made in Connection With the
Merger of the Company and Citizens Bancshares, Inc. In connection with the
merger of the Company and Citizens Bancshares, Inc. (the "Merger"), the Employer
will offer additional payments to certain Participants ("Severance Payments")
who terminate employment as an Eligible Employee or terminate service as a
Director. Participants to whom the Company offers Severance Payments may elect
to defer all or any portion of the Severance Payments by filing a written
Deferral Agreement with the Committee prior to the time the Employer is to make
the Severance Payments. If a Participant elects to defer all or part of the
Severance Payments under this Plan, the Company will contribute the Severance
Payments the Participant has elected to defer into an account maintained under
the Plan in the Participant=s name ("Severance Payment Account"). The
Participant will be fully vested in his or her Severance Payment Account at all
times. The Plan will invest the Participant=s Severance Payment Account
according to the provisions of Article V of the Plan. The Plan will distribute a
Participant=s Severance Payment Account according to the Participant=s written
election and the terms of Plan Sections 6.2 and 6.3; provided that, the Plan
will not begin distribution of a Participant=s Severance Payment Account until
at least 12 months from the date of the Participant=s Deferral Agreement.



                                       -8-

<PAGE>   13


         2.11. Supplemental Contributions Made in Connection with 1999 Salary
Deferrals. The Company offered each Participant the opportunity to forego up to
ten percent of his or her Salary for 1999 in exchange for a specified amount of
stock options with respect to the Company=s common stock. The Company will make
a Supplemental Pension Contribution pursuant to Section 2.5, and a Supplemental
Profit Sharing Contribution pursuant to Section 2.6, on behalf of each
Participant who elects to reduce his or her Salary in exchange for stock
options, as if the amount of such Salary reduction was a Deferral Contribution
under this Plan.


                                   ARTICLE III
                         DEFERRAL OF STOCK OPTION INCOME

         3.1. Stock Option Deferral Elections. To the extent permitted under
the terms of the Stock Option Plan, a Participant who has been granted a
non-qualified stock option (an "Option") under the Stock Option Plan may elect
to defer any income or gain that would otherwise be recognized upon the exercise
of the Option. If a Participant elects such a deferral, the Company will credit
the Stock Option Deferral Account of such Participant with the number of Stock
Units (as defined below) determined under Section 3.2 below.

         3.2. Crediting of Stock Units. The number of Stock Units to be
credited to a Participant's Stock Option Deferral Account shall be equal to the
fair market value, on the date of exercise of the applicable Option, of the
excess of: (i) the number of shares of common stock of the Company to be
purchased pursuant to the exercise of such Option, over (ii) a number of shares
of such common stock with a fair market value equal to the option price of such
Option. Each such Stock Unit, as of any given date, shall have a value equal to
the fair market value of a share of common stock of the Company on such date.
For purposes of this Section, fair market value of common stock of the Company
shall be defined as the closing price of such common stock on the National
Market System's NASDAQ Quotation Service on the trading day immediately
preceding the date as of which fair market value is determined.

         Additional credits shall be made to a Participant's Stock Option
Deferral Account in dollar amounts equal to the cash value (or the fair market
value of dividends paid in property other than common stock of the Company) that
the Optionee would have received had he been the owner on each record date of a
number of shares of common stock equal to the number of Stock Units credited to
his Stock Option Deferral Account on such date. In the case of a dividend in
common stock of the Company, additional credits will be made to the Stock Option
Deferral Account of the Participant of a number of Stock Units equal to the
number of shares of common stock that the Participant would have received had he
been the owner on each record date of a number of shares of such common stock
equal to the number of Stock Units credited to his Stock Option Deferral
Account. Any cash dividends (or the value of dividends paid in property other
than common stock of the Company) shall be converted into Stock Units based upon
the fair market value of common stock of the Company on the record date for
payment of any such dividend.

         3.3. "Stock Units" means units based upon the fair market value of
the common stock of the Company and credited to a Stock Option Deferral Account
pursuant to Section 3.1 above.




                                       -9-

<PAGE>   14


                                   ARTICLE IV
                        VESTING OF PARTICIPANTS' ACCOUNTS

         4.1.  Fully Vested Accounts. A Participant shall be fully vested in the
amount in his or her Compensation Deferral Account, Supplemental Matching 
Contributions Account, Rollover Contributions Account and Stock Option Deferral 
Account at all times.

         4.2. Supplemental Profit Sharing and Pension Contributions Accounts. A
Participant shall be vested in his or her Supplemental Profit Sharing and
Pension Contributions Accounts and his or her Frozen Profit Sharing Account
after he or she completes five Years of Service, as illustrated by the following
schedule:

<TABLE>
<CAPTION>

              YEARS OF SERVICE                              VESTED PERCENTAGE
              ----------------                              ----------------- 
<S>                                                                <C>
              Less than 5 years                                     0%
               5 or more years                                    100%

</TABLE>


         4.3.  Discretionary Company Contributions Account. Except as provided
in the following sentence, a Participant shall be vested in his or her
Discretionary Company Contributions Account at a rate of twenty percent (20%)
per Year of Service, as illustrated by the following schedule:


<TABLE>
<CAPTION>
              YEARS OF SERVICE                            VESTED PERCENTAGE
              ----------------                            -----------------
<S>                                                              <C>
              Less than 1 year                                    0%
                 1 full year                                     20%
                2 full years                                     40%
                3 full years                                     60%
                4 full years                                     80%
            5 or more full years                                100%
</TABLE>

Notwithstanding the foregoing, the Committee, in its sole discretion, may
specify in writing, a different vesting schedule applicable to any Participant
or group of Participants, and/or any particular Discretionary Company
Contributions Account.

         4.4.  Forfeiture Due to Competition or Breach of Confidentiality. A
Participant may not, except with the express prior written consent of the
Company, for a period of two (2) years after the Participant's Employment
Termination (the "Restrictive Period"), directly or indirectly compete with the
business of the Employers, including, but not by way of limitation, by directly
or indirectly owning, managing, operating, controlling, financing, or by
directly or indirectly serving as an employee, officer or director of or
consultant to, or by soliciting or inducing, or attempting to solicit or induce,
any employee or agent of an Employer to terminate employment with the Employer
and become employed by any person, firm, partnership, corporation, trust or
other entity that owns or operates, a bank, savings and loan association, credit
union or similar financial institution (a "Financial Institution") within a
twenty-five (25) miles radius of (i) an Employer's main office or (ii) the
office of any Employer's Affiliated Companies (the "Restrictive Covenant"). The
foregoing Restrictive Covenant shall not prohibit a Participant from owning
directly or indirectly capital stock or similar securities which are listed on a
securities exchange or quoted on the National Association 



                                      -10-

<PAGE>   15



of Securities Dealers Automated Quotation system which do not represent more
than one percent (1%) of the outstanding capital stock of any Financial
Institution.

         If a Participant violates the Restrictive Covenant or the Company's
Code of Professional Responsibility, all amounts in the Participant's
Discretionary Company Contributions Account, Frozen Profit Sharing Account and
Supplemental Matching, Profit Sharing, and Pension Contributions Accounts shall
be forfeited; except that this Section 4.4 shall become ineffective upon a
Change in Control of the Company.

         4.5.  Full Vesting Provisions. Notwithstanding the foregoing, a
Participant shall be fully vested in his or her entire Account upon: (i) the
date of the Participant's Employment Termination on account of death or
Disability; (ii) the Participant's Retirement Date; or (iii) a Change in Control
of the Company. Each Participant in the Mid Am, Inc. Non-Qualified Retirement
Plan (the "Mid Am Plan") on October 2, 1998, the effective date of the merger of
Mid Am, Inc. into Citizens Bancshares, Inc., acquired a 100% nonforfeitable
interest in his or her Accounts under the Mid Am Plan as of that date. The
Discretionary Company Contributions and the Supplemental Profit Sharing and
Pension Contributions made under the Mid Am Plan, and under this Plan, on and
after October 2, 1998, shall be subject to the vesting schedules contained in
this Article, based on all of the Participant's Years of Service before and
after that date.

         4.6.  Forfeiture. A Participant whose Employment Termination occurs
prior to the full vesting of his or her Account will forfeit the portion of his 
or her Account that is not vested.


                                    ARTICLE V
                           INVESTMENT OF CONTRIBUTIONS

         5.1. Investment of Participants' Accounts. All Participant and Company
Contributions shall be contributed by the Company to, and held and invested in
the Investment Funds maintained under the Trust. A Participant's Pension
Contributions Account, Frozen Profit Sharing Account and Discretionary Company
Contributions Account will be deemed to be invested in the Company Stock Fund.
The Participant will be consulted with respect to the investment of his or her
Supplemental Profit Sharing Contributions, Compensation Deferral and
Supplemental Matching Contributions Accounts. However, the Committee reserves
the right to invest all Participants' Accounts as it deems best. Each
Participant's Account shall be credited or debited with that Participant's
proportionate share of any gains or losses resulting from the Investment Funds.

         Any amount in a Participant's Account that is forfeited according to
Article IV shall be applied toward administrative expenses incurred in
connection with the Plan or used to reduce future Company contributions in the
sole discretion of the Committee. The Company shall provide each Participant
with a written statement of his Accounts at least semi-annually.

         5.2. Adjustment For Investment Earnings. The amounts credited to a
Participant's Account shall be adjusted from time to time in accordance with
uniform procedures established by the Committee to reflect the value of an
investment equal to the Participant's Account balance in the Investment Funds.
The Investment Funds available may be revised from time to time by the 


                                      -11-

<PAGE>   16

Committee with approval of the Trustee of the Trust described in Section 9.2.
The Committee, with the approval of the Trustee, may eliminate any Investment
Funds available at any time; provided, however, that the Committee may not
retroactively eliminate any Investment Fund.

         A Participant shall designate the applicable Investment Fund to be used
with respect to his or her Supplemental Profit Sharing Contributions,
Compensation Deferral and Supplemental Matching Contributions Accounts in
increments of at least 10%, pursuant to a written investment election form
delivered to the Committee on the date he or she commences participation in the
Plan. The Participant may change his or her Investment Fund designation with
respect to future contributions credited to his or her Supplemental Profit
Sharing Contributions, Compensation Deferral and Supplemental Matching
Contributions Accounts, and/or with respect to amounts previously credited to
such Accounts, by notifying the Committee or its designee. A revised investment
direction may be made by a Participant in writing on a quarterly basis and shall
be effective as of the beginning of the calendar quarter immediately following
such written submission; provided, however, that the Committee or its designee
shall have the discretion to delay the effective date of any revised investment
direction to the beginning of the second calendar quarter following receipt of
such direction if the Committee or its designee receives such direction fewer
than 15 days prior to the beginning of a calendar quarter.

         5.3. Investment of Prior Deferrals. Prior to the effective date of this
Plan, certain officers entered into Letters of Agreement Deferring Officer's
Compensation (the "Agreements"). Under the Agreements, amounts in a Deferred
Officer's Compensation Account (as defined in the Agreements) could be invested
in a life insurance contract to be owned by the Company. A Participant who
previously had directed that all or any portion of his Deferred Officer's
Compensation Account be invested in life insurance contracts may continue to
direct that all or any portion of his or her Deferral Contribution be invested
in an existing life insurance contract held under the Trust.


                                   ARTICLE VI
                                  DISTRIBUTIONS

         6.1. Distribution of Participants' Accounts. A Participant's Accounts
will be distributed to him or her in accordance with the provisions of this
Article VI. A Participant's Accounts will be distributed in cash, except that:
(i) the portions of a Participant's Supplemental Pension Contributions Account
and Frozen Profit Sharing Account that are deemed to be invested in the Company
Stock Fund as of the date that distribution of the Participant's Accounts is to
be made can be distributed in shares of Company common stock, at the
Participant's election; and (ii) a Participant's Stock Option Deferral Account
shall be distributed in shares of Company common stock.

         6.2. Form of Distribution. Each Participant shall elect the manner of
payment of his or her Account, generally at the time of any Deferral Agreement.
No such election shall be effective if made or modified within 12 months of the
date distribution is made or commences. A Participant may elect to have his or
her Account distributed in a lump sum or in substantially equal annual (or more
frequent, as permitted by the Committee) installment payments over a period not
to exceed fifteen (15) years. If a Participant does not make a valid
distribution election, then the manner of 






                                      -12-

<PAGE>   17

payment and date for commencement of payment of the Participant's Account shall
be selected by the Committee in its sole discretion.

         Notwithstanding the foregoing, if the value of the Participants'
Accounts is less than $5,000 at any time after the Participant's Employment
Termination, such Accounts shall be distributed to the Participant in a single
lump sum distribution, as soon as practicable. If the Participant fails to elect
a form or period of distribution, the Participant's Accounts will be paid in a
manner selected by the Committee or its designee. The Participant also may
elect, at the time of his or her election of Compensation Deferral
Contributions, to have distributions commence as soon as practicable after his
or her Disability.

         6.3. Timing of Distribution. The balance of a Participant's Accounts
shall be distributed to or with respect to the Participant only: (i) upon
Employment Termination, (ii) upon a Participant's 5, 10, 15, 20, 25 or 30-year
anniversary of service with the Employer (or any year anniversary thereafter),
as elected by the Participant at least 12-months prior to the date of such
anniversary, (iii) because of hardship in accordance with Section 6.5, or (iv)
to the extent a Participant's Account balance becomes subject to immediate
income taxation.

              (a) Notwithstanding the Participant's election, distribution of a
         Participant's Accounts will begin as soon as practicable after the
         Participant's Employment Termination; except that distributions to a
         Participant will not begin sooner than 12-months following his or her
         election as to the form and timing of such distributions unless the
         Participant's Employment Termination is due to death.

              (b) Notwithstanding anything in this Section to the contrary, the
         balance of a Participant's Stock Option Deferral Account may not be
         distributed to or with respect to the Participant until a date that is
         at least 12 months from the date of exercise of the applicable Option.

         6.4. Distribution of Insurance Contracts. Notwithstanding anything in
this Article to the contrary, for any Participant who, pursuant to the
Agreements, previously directed that all or a portion of his Deferred Officers
Compensation Account (as defined in the Agreements) be invested in a life
insurance contract in accordance with Section 5.3, the life insurance contract
will be distributed to him or her according to the terms of the contract.

         6.5. Distributions Upon Death. If a Participant dies before full
distribution of his or her Account, any remaining amounts shall be distributed
to the beneficiary, and in the method, designated by the Participant in a
writing delivered most recently to the Committee prior to death. If a
Participant has not designated a beneficiary, or method of distribution, or if
no designated beneficiary is living on the date of distribution, such amounts
shall be distributed to those persons entitled to receive distributions of the
Participant's accounts under the Qualified Savings Plan and in the same method
as distribution is made under the Qualified Savings Plan. If the Participant has
no account under the Qualified Savings Plan, such amounts shall be distributed
to those persons entitled to receive distributions of the Participant's accounts
under the Qualified Pension Plan and in the same method as distribution is made
under the Qualified Pension Plan. If the Participant has 




                                      -13-

<PAGE>   18



no accounts under the Qualified Plans, distribution of the Participant's Account
shall be made to the Participant's estate.

         6.6. Hardship Distributions. In the discretion of the Committee, and
at the written request of a Participant, an amount up to 100 percent of his or
her vested Account may be distributed to a Participant in the case of an
"unforeseeable emergency," subject to the limitations set forth below.
For purposes of this Section 6.5, an "unforeseeable emergency" is a severe
financial hardship to the Participant resulting from a sudden and unexpected
illness or accident of the Participant or of a dependent (as defined in Code
Section 152(a)) of the Participant, loss of the Participant's property due to
casualty, or other similar extraordinary and unforeseeable circumstances arising
as a result of events beyond the control of the Participant. The circumstances
that will constitute an unforeseeable emergency will depend upon the facts of
each case, but, in any case, payment may not be made to the extent that such
hardship is or may be relieved:

               (a) through reimbursement or compensation by insurance or
         otherwise;

               (b) by liquidation of the Participant's assets, to the extent the
         liquidation of such assets would not itself cause severe financial
         hardship; or

               (c) by cessation of Deferral Contributions under the Plan.

         Only one hardship distribution shall be permitted during a Plan Year. A
Participant's request for a hardship distribution must be accompanied or
supplemented by such evidence that the hardship is necessary as the Committee or
its designee may reasonably require. Withdrawals of amounts because of an
unforeseeable emergency shall be permitted only to the extent reasonably needed
to satisfy the unforeseeable emergency need.

         Any Participant who receives a hardship distribution shall cease
Deferral Contributions for a period of one year following the date of such
hardship distribution. Reentry into the Plan will be according to the Deferral
Agreement procedures described in Section 2.3.

         6.7. Tax-Savings Clause. Notwithstanding anything to the contrary
contained herein, if (i) the Internal Revenue Service (IRS) prevails in its
claim that all or a portion of the amounts contributed to the Plan, and/or
earnings thereon, constitute taxable income to a Participant or beneficiary for
any taxable year that is prior to the taxable year in which such contributions
and/or earnings are actually distributed to such Participant or beneficiary,
(ii) the U.S. Department of Labor (DOL) prevails in its claim that the Trust
prevents the Plan from meeting the "unfunded" criterion of the exceptions to
various requirements of Title I of the Employee Retirement Income Security Act
of 1974 (ERISA) for plans that are unfunded and maintained primarily for the
purpose of providing deferred compensation for a select group of management or
highly compensated employees, or (iii) legal counsel selected by the Committee
advises the Committee that the IRS or DOL would likely prevail in such claim,
the applicable Account balance shall be immediately distributed to the
Participant or beneficiary. For purposes of this Section, the IRS or DOL shall
be deemed to have prevailed in a claim if such claim is upheld by a court of
final jurisdiction, or if the Committee, based upon the advice of legal counsel
selected by the Committee, fails to appeal a decision of the 




                                      -14-

<PAGE>   19



IRS or DOL, or a court of applicable jurisdiction, with respect to such claim,
to an appropriate IRS or DOL appeals authority or to a court of higher
jurisdiction within the appropriate time period.


                                   ARTICLE VII
                           ADMINISTRATION OF THE PLAN

         7.1. Administration by the Committee. The Committee shall be
responsible for the general operation and administration of the Plan and for
carrying out the provisions thereof.

         7.2. Power and Duties of Committee. The Committee shall administer
the Plan in accordance with its terms and shall have all powers necessary to
carry out the provisions of the Plan. The Committee shall interpret the Plan and
shall determine all questions arising in the administration, interpretation, and
application of the Plan, including but not limited to, questions of eligibility
and the status and rights of employees, Participants and other persons. Any such
determination by the Committee shall presumptively be conclusive and binding on
all persons. The regularly kept records of the Company shall be conclusive and
binding upon all persons with respect to a Participant's date and length of
service, amount of Compensation and the manner of payment thereof, type and
length of any absence from work and all other matters contained therein relating
to Participants. All rules and determinations of the Committee shall be
uniformly and consistently applied to all persons in similar circumstances. To
the extent not inconsistent with this Plan, all provisions set forth in the
Qualified Plans with respect to the administrative powers and duties of the
Committee, expenses of administration, and procedures for filing claims, also
shall be applicable with respect to this Plan.


                                  ARTICLE VIII
                            AMENDMENT OR TERMINATION

         8.1. Amendment or Termination. The Company intends the Plan to be
permanent but reserves the right to amend or terminate the Plan at any time. Any
such amendment or termination shall be made pursuant to a resolution of the
Board and shall be effective as of the date of such resolution.

         8.2. Effect of Amendment or Termination. No amendment or termination
of the Plan shall directly or indirectly reduce the balance of any Account held
hereunder as of the effective date of such amendment or termination. Upon
termination of the Plan, distribution of amounts in a Participant's Account
shall be made to the Participant or his or her beneficiary in the manner and at
the time described in Article VI of the Plan. No additional contributions shall
be made to the Account of a Participant after termination of the Plan, but the
Company shall continue to credit gains and losses to Participants' Accounts
pursuant to Article V, until the balance of such Accounts have been fully
distributed to each Participant or beneficiary, as applicable.





                                      -15-

<PAGE>   20



         
                                   ARTICLE IX
                               GENERAL PROVISIONS



         9.1. Participant's Rights Unsecured. Except as otherwise set forth in
Section 9.2, the Plan at all times shall be entirely unfunded and no provision
shall at any time be made with respect to segregating any assets of the Company
or its Affiliates for payment of any distributions hereunder. The right of a
Participant or beneficiary to receive a distribution hereunder shall be an
unsecured claim against the general assets of the Company or its Affiliates, and
neither the Participant nor any beneficiary shall have any rights in or against
any specific assets of the Company or its Affiliates. All amounts credited to
the Participants' Accounts shall constitute general assets of the Employer for
whose participants the amounts were contributed, and may be disposed of by the
Company or the Employer at such time and for such purposes as it may deem
appropriate.

         9.2. Trust Agreement. All rights under this Plan shall at all times be
entirely unfunded, and no provision shall at any time be made with respect to
segregating any assets of the Company or any Employer for payment of any amounts
due hereunder. No Participant or beneficiary under the Plan shall have any
interest in or rights against any specific assets of the Company or any
Employer, and all Participants and beneficiaries shall have only the rights of
general unsecured creditors of the Company and the applicable Employer.
Notwithstanding the preceding provisions of this Section, the Company, in its
discretion shall have the right, at any time and from time to time, to cause
amounts payable to any Participant or beneficiary hereunder to be paid to the
trustee of a Trust established by the Company for the benefit of Participants or
their beneficiaries. Such Trust shall contain terms and conditions to ensure
that the Trust assets and earnings will be subject to creditors of the Employer
for whose Participants the assets were contributed, but will otherwise be
available only to pay benefits to Participants and beneficiaries pursuant to the
terms of the Plan, and will contain such other provisions as are necessary to
assure that transfers to the Trust, and earnings on Trust assets, will not
constitute taxable income to any Participant or beneficiary pursuant to
applicable provisions of the Code.

         9.3. General Conditions. Except as otherwise expressly provided
herein, all terms and conditions of the Qualified Plans applicable to a
Qualified Plan Compensation Deferral, Qualified Plan Matching, Qualified Plan
Pension, or Qualified Plan Profit Sharing Contribution will also be applicable
to an Eligible Employee's Deferral, Supplemental Matching, Supplemental Pension,
or a Supplemental Profit Sharing Contribution, to be made hereunder. Any
Qualified Plan Compensation Deferral, Qualified Plan Matching, Qualified Plan
Pension, or Qualified Plan Profit Sharing Contribution, or any other
contributions to be made under the Qualified Plans, shall be made solely in
accordance with the terms and conditions of the Qualified Plans, and nothing in
the Plan shall operate or be construed in any way to modify, amend or affect the
terms and provisions of the Qualified Plans.

         9.4. No Guaranty of Benefits. Nothing contained in the Plan shall
constitute a guaranty by the Company or any Affiliate or any other person or
entity that the assets of the Company or any Affiliate will be sufficient to pay
any benefit hereunder.

         9.5. No Enlargement of Employee Rights. No Participant shall have any
right to receive a distribution of contributions made under the Plan except in
accordance with the terms of the Plan.






                                      -16-

<PAGE>   21


Establishment of the Plan shall not be construed to give any Participant the
right to be retained in the service of the Company or any Affiliated Company.

         9.6. Spendthrift Provision. No interest of any person or entity in, or
right to receive a distribution under, the Plan shall be subject in any manner
to sale, transfer, assignment, pledge, attachment, garnishment, or other
alienation or encumbrance of any kind; nor may such interest or right to receive
a distribution be taken, either voluntarily or involuntarily for the
satisfaction of the debts of, or other obligations or claims against, such
person or entity, including claims for alimony, support, separate maintenance
and claims in bankruptcy proceedings.

         9.7. Applicable Law. To the extent the laws of the United States do
not apply, the Plan shall be construed and administered under the laws of the
State of Ohio, other than its laws respecting choice of law.

         9.8. Incapacity of Recipient. If any person entitled to a distribution
under the Plan is deemed by the Company or its designee to be incapable of
personally receiving and giving a valid receipt for such payment, then, unless
and until claim therefor shall have been made by a duly appointed guardian or
other legal representative of such person, the Company or its designee may
provide for such payment or any part thereof to be made to any other person or
institution then contributing toward or providing for the care and maintenance
of such person. Any such payment shall be a payment for the account of such
person and a complete discharge of any liability of the Company, its designee
and the Plan therefor.

         9.9. Corporate Successors. The Plan shall not be automatically
terminated by a transfer or sale of assets of the Company, or by the merger or
consolidation of the Company into or with any other corporation or other entity,
but the Plan shall be continued after such sale, merger or consolidation only if
and to the extent that the transferee, purchaser or successor entity agrees to
continue the Plan. If the Plan is not continued by the transferee, purchaser or
successor entity, then the Plan shall terminate subject to the provisions of
Section 8.2.

         9.10. Unclaimed Benefit. In the event that all, or any portion, of the
distribution payable to a Participant or beneficiary hereunder shall, at the
expiration of five years after it shall become payable, remain unpaid solely by
reason of the inability of the Company or its designee, after sending a
registered letter, return receipt requested, to the last known address, and
after further diligent effort, to ascertain the whereabouts of such Participant
or beneficiary, the amount so distributable shall be treated as a forfeiture and
shall be retained by the Company as part of its general assets.

         9.11. Limitations on Liability. Notwithstanding any of the preceding
provisions of the Plan, neither the Company nor any individual acting as
employee or agent of the Company shall be liable to any Participant, former
Participant, beneficiary or other person for any claim, loss, liability or
expense incurred in connection with the Plan.

         9.12. Claims Procedure. A claim for a Plan benefit shall be deemed
filed when a written communication is made by a Participant or Beneficiary, or
the authorized representative of either, which is reasonably calculated to bring
the claim to the attention of the Committee. If a claim is 


                                      -17-

         
<PAGE>   22


wholly or partially denied, notice of such decision shall be furnished to the
claimant in writing within 90 days after receipt of the claim by the Committee.
Such notice shall set forth, in a manner calculated to be understood by the
claimant: (i) the specific reason or reasons for the denial; (ii) specific
reference to pertinent Plan provisions on which the denial is based; (iii) a
description of any additional material or information necessary to perfect the
claim and an explanation of why such material or information is necessary; and
(iv) an explanation of the Plan's claims review procedure. If no such notice is
furnished to the claimant within 90 days after receipt of a claim by the
Committee, such claim shall be deemed wholly denied.

         Within 90 days from the receipt of the note of denial, a claimant may
appeal such denial to the Committee for a full and fair review. The review shall
be instituted by the filing of a written request for review by the claimant or
his or her authorized representative within the 90-day period stated above. A
request for review shall be deemed filed as of the date of receipt of such
written request by the Committee. The claimant or his or her authorized
representative shall have the right to review all pertinent documents, may
submit issues and comments in writing and may do such other appropriate things
as the Committee may allow. The decision of the Committee shall be made not
later than 60 days after the receipt of the request for review, unless special
circumstances, such as the need to hold a hearing, require an extension of time,
in which case, a decision shall be rendered not later than 120 days after the
receipt of a request for review. Such decision shall be final and binding on the
claimant.

         9.13. Gender and Number. Words in the masculine gender shall include
the feminine and the singular shall include the plural, and vice versa, unless
qualified by the context. Any headings used herein are included for reference
only, and are not to be construed so as to alter the terms hereof.

         9.14. Indemnification. The Company and each Employer shall indemnify
and hold harmless each member of the Committee, or any employee of the Company
or an Employer, or any individual acting as an employee or agent of either of
them (to the extent not indemnified or saved harmless under any liability
insurance or any other indemnification arrangement) from any and all claims,
losses, liabilities, costs and expenses (including attorneys' fees) arising out
of any actual or alleged act or failure to act made in good faith pursuant to
the provisions of the Plan or the Trust, including expenses reasonably incurred
in the defense of any claim relating thereto with respect to the administration
of the Plan or the Trust, except that no indemnification or defense shall be
provided to any person with respect to any conduct that has been judicially
determined, or agreed by the parties, to have constituted willful misconduct on
the part of such person, or to have resulted in his or her receipt of personal
profit or advantage to which he or she is not entitled.




                                      -18-


<PAGE>   1
                                                               EXHIBIT 10.6



                            INDEMNIFICATION AGREEMENT              

         This Agreement made this     day of          , 1998, between Sky
Financial Group, Inc., a bank holding company registered under the Bank Holding
Company Act of 1956, as amended, and an Ohio corporation (The "Company") and
                     , a director, officer or representative (as hereinafter
defined) of the Company (the "Indemnitee");

         WHEREAS, the Company and the Indemnitee are each aware of the exposure
to litigation of officers, directors and representatives of the Company as such
persons exercise their duties to the Company;

         WHEREAS, the Company and the Indemnitee are also aware of conditions in
the insurance industry that have affected and may continue to affect the
Company's ability to obtain appropriate directors' and officers' liability
insurance on an economically acceptable basis;

         WHEREAS, the Company desires to continue to benefit from the services
of highly qualified, experienced and otherwise competent persons such as the
Indemnitee;

         WHEREAS, the Indemnitee desires to serve or to continue to serve the
Company as a director, officer or as a director, officer or trustee of another
corporation, joint venture, trust or other enterprise in which the Company has a
direct or indirect ownership interest, for so long as the Company continues to
provide on an acceptable basis adequate and reliable indemnification against
certain liabilities and expenses which may be incurred by the Indemnitee.

         NOW, THEREFORE, in consideration of the foregoing premises and the
mutual covenants herein contained, the parties hereto agree as follows:


                                       A-1


<PAGE>   2

         1. Indemnification. Subject to the terms of this Agreement and, if
applicable as a continuation of the indemnification offered by Citizens
Bancshares, Inc. pursuant to an indemnification agreement previously entered
into on [SPECIFY DATE], the Company shall indemnify the Indemnitee with respect
to his activities as a director or officer of the Company and/or as a person who
is serving or has served on behalf of the Company ("representative") as a
director, officer, or trustee of another corporation, joint venture, trust or
other enterprise, domestic or foreign, in which the Company has a direct or
indirect ownership interest (an "affiliated entity") against expenses
(including, without limitation, attorneys' fees, judgments, fines, and amounts
paid in settlement) actually and reasonably incurred by him ("Expenses") in
connection with any claim against Indemnitee which is the subject of any
threatened, pending, or completed action, suit, or proceeding, whether civil,
criminal, administrative, investigative or otherwise and whether formal or
informal (a "Proceeding"), to which Indemnitee was, is, or is threatened to be
made a party by reason of facts which include Indemnitee's being or having been
such a director, officer or representative, to the extent of the highest and
most advantageous to the Indemnitee, as determined by the Indemnitee, of one or
any combination of the following: 

        (a) The benefits provided by the Company's Regulations in effect 
on the date hereof;

        (b) The benefits provided by the Articles of Incorporation, Regulations,
or By-Laws or their equivalent of the company in effect at the time Expenses are
incurred by Indemnitee;
      
        (c) The benefits allowable under Ohio law in effect at the date hereof;
      
        (d) The benefits allowable under the law of the jurisdiction under which
the Company exists at the time Expenses are incurred by the Indemnitee;


                                       A-2



<PAGE>   3

        (e)  The benefits available under liability insurance obtained by 
the Company;

        (f)  The benefits available under the $25,000,000 insurance policy
obtained by the Company from the Cincinnati Insurance Company in effect for
1999; and

        (g)  Such other benefits as are or may be otherwise available to
Indemnitee.

         Combination of two or more of the benefits provided by (a) through (g)
shall be available to the extent that the Applicable Document, as hereafter
defined, does not require that the benefits provided therein be exclusive of
other benefits. The document or law providing for the benefits listed in items
(a) through (g) above is called the "Applicable Document" in this Agreement.
Company hereby undertakes to use its best efforts to assist Indemnitee, in all
proper legal ways, to obtain the benefits selected by Indemnitee under items (a)
through (g) above.

         For purposes of this Agreement, references to "other enterprises" shall
include employee benefit plans for employees of the Company or of any affiliated
entity without regard to ownership of such plans; references to "fines" shall
include any excise taxes assessed on the Indemnitee with respect to any employee
benefit plan; references to "serving on behalf of the company" shall include any
services as a director, officer, employee or agent of the Company which imposes
duties on, or involves services by, the Indemnitee with respect to an employee
benefits plan, its participants or beneficiaries; references to the masculine
shall include the feminine; references to the singular shall include the plural
and vice versa; and if the Indemnitee acted in good faith and in a manner he
reasonably believed to be in the interest of the participants and beneficiaries
of an employee benefit plan he shall be deemed to have acted in a manner
consistent with the standards required for indemnification by the Company under
the Applicable Documents.


                                      A-3


<PAGE>   4

         2.  Insurance.  The Company shall maintain directors' and officers'
liability insurance for so long as Indemnitee's services are covered hereunder,
provided and only to the extent that such insurance is available in amounts and
on terms and conditions determined by the Company to be acceptable. However, the
Company agrees that the provisions hereof shall remain in effect regardless of
whether liability or other insurance coverage is at any time obtained or
retained by the Company; except that any payments in fact made to Indemnitee
under an insurance policy obtained or retained by the Company shall reduce the
obligation of the Company to make payments hereunder by the amount of the
payments made under any such insurance policy.
    
        3.  Payment of Expenses.  At Indemnitee's request, the Company shall 
pay the Expenses as and when incurred by Indemnitee, after receipt of written 
notice pursuant to Section 6 hereof and an undertaking in the form of Exhibit I
attached hereto by or on behalf of Indemnitee (i) to repay such amounts so paid
on Indemnitee's behalf if it shall ultimately be determined under the Applicable
Document or applicable law that Indemnitee is required to repay such amounts and
(ii) to reasonably cooperate with the Company concerning such Proceeding. That
portion of Expenses which represents attorneys' fees and other costs incurred in
defending any Proceeding shall be paid by the Company within thirty (30) days of
its receipt of such request, together with reasonable documentation (consistent,
in the case of attorneys' fees, with Company practice in payment of legal fees
for outside counsel generally) evidencing the amount and nature of such
Expenses, subject to its also having received such notice and undertaking.


                                      A-4


<PAGE>   5

                        
         It is understood and agreed before the Company pays the Expenses
incurred in a Proceeding brought by a federal banking agency in which a final
order has not been entered, the following conditions must be met:

         (1)  The Board of Directors, in good faith, shall determine in writing
after due investigation and consideration that the Indemnitee acted in good in a
manner believed to be in the best interests of the Company;

         (2)  The Board of Directors, in good faith, shall determine after due
investigation and consideration that the payment of such Expenses will not
materially or adversely affect the Company's safety and soundness.

         (3)  The Indemnitee shall agree in writing to reimburse the Company for
Expenses which subsequently are deemed "prohibited indemnification payments", as
defined in 12 C.F.R. Section 359.1(1).

         The Indemnitee shall not participate in any way in the Board's
discussion and approval of Expenses, provided however, that the Indemnitee may
present his or her request to the Board and respond to any inquiries from the
Board concerning his or her involvement in the circumstances giving rise to the
federal banking agency Proceeding or civil action.

         4.   Escrow.  The Company shall dedicate such amounts as the Board of
Directors of the Company may from time to time authorize, up to an aggregate of
Two Hundred Forty Thousand Dollars ($240,000) as collateral security for the
initial funding of its obligations hereunder and under similar agreements with
other directors, officers and representatives by depositing assets or bank
letters of credit in escrow or reserving lines of credit that may be drawn down
by an escrow agent in the dedicated amount (the "Escrow Reserve"). The Company
shall promptly provide Indemnitee with a true and complete copy of the agreement
relating to the


                                      A-5


<PAGE>   6

establishment and operation of the Escrow Reserve, together with such additional
documentation or information with respect to the escrow as Indemnitee may from
time to time reasonably request. The Company shall promptly deliver an executed
copy of the Agreement to the escrow agent for the Escrow Reserve to evidence to
that agent that Indemnitee is a beneficiary of that Escrow Reserve and shall
deliver to Indemnitee the escrow agent's signed receipt evidencing that
delivery.

         5.   Additional Rights.  The indemnification provided in this Agreement
shall not be exclusive of any other indemnification or right to which Indemnitee
may be entitled and shall continue after Indemnitee has ceased to occupy a
position as an officer, director or representative as described in Paragraph 1
above with respect to Proceedings relating to or arising out of Indemnitee's
acts or omissions during his service in such position.

         6.   Notice to Company.  Indemnitee shall provide to the Company prompt
written notice of any Proceeding brought, threatened, asserted or commenced
against Indemnitee with respect to which Indemnitee may assert a right to
indemnification hereunder; provided that failure to provide such notice shall
not in any way limit Indemnitee's rights under this Agreement.

         7.   Cooperation in Defense and Settlement.  Indemnitee shall not make
any admission or effect any settlement of any Proceeding without the Company's
written consent unless Indemnitee shall have determined to undertake his own
defense in such matter and has waived the benefits of this Agreement. The
Company shall not settle any Proceeding to which Indemnitee is a party in any
manner which would impose any Expense on Indemnitee without his written consent.
Neither Indemnitee nor the Company will unreasonably withhold consent to any
proposed settlement. Indemnitee and the Company shall cooperate to the extent
reasonably


                                      A-6

<PAGE>   7

possible with each other and with the Company's insurers, in attempts
to defend and/or settle such Proceeding.

         8.  Assumption of Defense.  Except as otherwise provided below, to the
extent that it may wish, the Company jointly with any other indemnifying party
similarly notified, will be entitled to assume Indemnitee's defense in any
Proceeding, with counsel mutually satisfactory to Indemnitee of the Company's
election so to assume such defense, the Company will not be liable to Indemnitee
in connection with defense thereof other than reasonable costs of investigation
or as otherwise provided below. Indemnitee shall have the right to employ
counsel in such Proceeding, but the fees and expenses of such counsel incurred
after notice from the Company of its assumption of the defense thereof shall be
at Indemnitee's expense unless:

            (a)    the employment of counsel by Indemnitee has been authorized
         by the Company;

            (b)    counsel   employed  by  the  Company   initially  is  
         unacceptable   or  later  becomes unacceptable to Indemnitee and such 
         unacceptability is reasonable under then existing circumstances;
 
            (c)    Indemnitee shall have reasonably concluded that there may be 
         a conflict of interest between Indemnitee and the Company in the 
         conduct of the defense of such Proceeding; or

            (d)    the  Company  shall not have  employed  counsel  promptly  to
         assume the defense of such Proceeding,

in each of which case fees and expenses of counsel shall be at the expense of
the Company and subject to payment pursuant to this Agreement. The Company shall
not be entitled to assume the


                                      A-7

<PAGE>   8

defense of Indemnitee in any Proceeding brought or on behalf or the Company or 
as to which Indemnitee shall have drawn either of the conclusions provided for 
in clauses (b) or (c) above.

         9.  Enforcement.  In the event that any dispute or controversy shall
arise under this Agreement between Indemnitee and the Company with respect to
whether the Indemnitee is entitled to indemnification in connection with any
Proceeding or with respect to the amount of Expenses incurred, then with respect
to each such dispute or controversy Indemnitee may seek to enforce the Agreement
through legal action of, at Indemnitee's sole option and written request,
through arbitration. If arbitration is requested, such dispute or controversy
shall be submitted by the parties to binding arbitration in the City of Toledo,
State of Ohio, before a single arbitrator agreeable to both parties. If the
parties cannot agree on a designated arbitrator within 15 days after arbitration
is requested in writing by Indemnitee, the arbitration shall proceed in the City
of Toledo, State of Ohio, before an arbitrator appointed by the American
Arbitration Association. In either case, the arbitration proceeding shall
commence promptly under the rules then in effect of that Association and the
arbitrator agreed to by the parties or appointed by that Association shall be an
attorney other than an attorney who has, or is associated with a firm having
associated with it an attorney which has, or is associated with a firm having
associated with it an attorney which has, been retained by or performed services
for the Company or Indemnitee at any time during the five years preceding the
commencement of arbitration. The award shall be rendered in such form that
judgment many be entered thereon in any court having jurisdiction thereof. The
prevailing party shall be entitled to prompt reimbursement of any costs and
expenses (including, without limitation, reasonable attorneys' fees) incurred in
connection with such legal action or arbitration; provided that Indemnitee shall
not be obligated to reimburse the Company 


                                      A-8


<PAGE>   9

unless the arbitrator or court which resolves the dispute determines that 
Indemnitee acted in bad faith in bringing such action or arbitration.

         10.  Exclusions.  Notwithstanding the scope of indemnification which
may be available to Indemnitee from time to time under any Applicable Document,
no indemnification, reimbursement or payment shall be required of the Company
hereunder with respect to:

              (a)  Any claim or any part thereof as to which Indemnitee shall
have been determined by a courts of competent jurisdiction from which no appeal
is or can be taken, by clear and convincing evidence, to have acted or failed to
act with deliberate intent to cause injury to the Company or with reckless
disregard for the best interest of the Company'

              (b)  Any claim or any part thereof arising under Section 16(b)
of the Securities Exchange Act of 1934 pursuant to which Indemnitee shall be
obligated to pay any penalty, fine, settlement or judgment;

              (c)  Any civil money penalty or judgment resulting from any
Proceeding instituted by any federal banking agency, or any other liability or
legal expense with regard to any administrative proceeding or civil action by
any federal banking agency that results in a final order or settlement pursuant
to which Indemnitee:
 
              (1)          is assessed a civil money penalty;

              (2)          is removed from office or prohibited from 
                   participating in the conduct of the affairs of the Company or
                   its affiliates; or

              (3)          is required to cease and desist from taking any
                   affirmative action described under the Federal Deposit 
                   Insurance Act or other applicable banking laws with respect 
                   to the Company and its affiliates;


                                      A-9

<PAGE>   10

                  (d)  Any obligation of Indemnitee based upon or attributable
to the Indemnitee gaining in fact any personal gain, profit or advantage to
which he was not entitled; or

                  (e)  Any Proceeding initiated by Indemnitee without the 
consent or authorization of the Board of Directors of the Company, provided that
this exclusion shall not apply with respect to any claims brought by Indemnitee 
(i) to enforce his rights under this Agreement or (ii) in any Proceeding
initiated by another person or entity whether or not such claims were brought by
Indemnitee against a person or entity who was otherwise a party to such
Proceeding.

         Nothing in this Section 10 shall eliminate or diminish Company's
obligations to advance that portion of Indemnitee's Expenses which represent
attorneys' fees and other costs incurred in defending any Proceeding pursuant to
Section 3 of this Agreement; subject however to the undertaking by Indemnitee in
the form attached hereto as Exhibit 1 and incorporated by reference herein.

         11.      Extraordinary Transactions. The Company covenants and agrees
that, in the event of any merger, consolidation or reorganization in which the 
Company is not the surviving entity, any sale of all or substantially all of the
assets of the Company or any liquidation of the Company (each such event is 
hereinafter referred to as an "extraordinary transaction"), the Company shall:

                  (a)  have the obligations of the Company under this Agreement
expressly assumed by the survivor, purchaser or successor, as the case may be,
in such extraordinary transaction; or

                  (b)  otherwise adequately provide for the satisfaction of the
Company's obligations under this Agreement, in a manner acceptable to
Indemnitee.

                                      A-10

<PAGE>   11


         12.  No Personal Liability. Indemnitee agrees that neither the 
directors nor any officer, employee, representative or agent of the Company 
shall be personally liable for the satisfaction of the Company's obligations 
under this Agreement, and Indemnitee shall look solely to the assets of the 
Company and the escrow referred to in Section 4 hereof for satisfaction of any 
claims hereunder.

         13.  Severability. If any provision, phrase, or other portion of this
Agreement should be determined by any court of competent jurisdiction to be
invalid, illegal or unenforceable, in whole or in part, and such determination
should become final, such provision, phrase or other portion shall be deemed to
be severed or limited, but only to the extent required to render the remaining
provisions and portions of the Agreement enforceable, and the Agreement as thus
amended shall be enforced to give effect to the intention of the parties insofar
as that is possible.

         14.  Subrogation.  In the event of any payment under this Agreement, 
the Company shall be subrogated to the extent thereof to all rights to
indemnification or reimbursement against any insurer or other entity or person
vested in the Indemnitee, who shall execute all instruments and take all other
actions as shall be reasonably necessary for the Company to enforce such rights.
        
         15.  Governing Law.The parties hereto agree that this Agreement shall
be construed and enforced in accordance with and governed by the laws of the
State of Ohio.

         16.  Notices. All notices, requests, demands and other communications
hereunder shall be in writing and shall be considered to have been duly given if
delivered by hand and receipted for by the party to whom the notice, request,
demand or other communication shall have been directed, or mailed by certified
mail, return receipt requested, with postage prepaid:


                                      A-11

<PAGE>   12

        (a)                    If to the Company, to:

              Sky Financial Group, Inc.
              221 South Church Street
              Bowling Green, Ohio  43402
              Attention:  General Counsel

         b)                    If to Indemnitee, to:

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

or to such other or further address as shall be designated from time to time by
the Indemnitee or the Company to the other.

         17.  Termination.  This Agreement may be terminated by either party
upon not less than sixty (60) days prior written notice delivered to the other 
party, but such termination shall not in any way diminish the obligations of 
Company hereunder (including the obligation to maintain the escrow referred to 
in Section 4 hereof) with respect to the Indemnitee's activities prior to the
effective date of termination.

         18.  Amendments and Binding Effect.  This Agreement and the Undertaking
and the rights and duties of Indemnitee and the Company hereunder and thereunder
may not be amended, modified or terminated except by written instrument signed
and delivered by the parties hereto [ADD REFERENCE TO BANCSHARES AGREEMENTS, AS
APPLICABLE]. This Agreement is and shall be binding upon and shall inure to the
benefits of the parties thereto and their respective heirs, executors,
administrator, successors and assigns.

         IN WITNESS WHEREOF, the undersigned have executed this Agreement in
triplicate as of the date first above written.

INDEMNITEE                                           SKY FINANCIAL GROUP, INC.
                                      A-12

<PAGE>   13



By:____________________________             By:____________________________

Title:___________________________           Title:___________________________






                                      A-13

<PAGE>   14

                                                                       EXHIBIT 1

                               FORM OF UNDERTAKING

         THIS UNDERTAKING has been entered into by 
(hereinafter "Indemnitee") pursuant to an Indemnification Agreement dated
                , 1998 (the "Indemnification Agreement"), by and between SKY
FINANCIAL GROUP, INC., a bank holding company registered under the Bank Holding
Company Act of 1956, as amended, and an Ohio corporation (the "Company"), and
Indemnitee.
                              W I T N E S S E T H:

         WHEREAS, pursuant to the Indemnification Agreement, Company agreed to
pay Expenses (within the meaning of the Indemnification Agreement) as and when
incurred by Indemnitee in connection with any claim against Indemnitee which is
the subject of any threatened, pending, or completed action, suit, or
proceeding, whether civil, criminal, administrative or investigative, to which
Indemnitee was, is, or is threatened to be made a party by reason of facts which
include Indemnitee's being or having been a director, officer or representative
(within the meaning of the Indemnification Agreement) of the Company;

         WHEREAS, such a claim has arisen against Indemnitee and Indemnitee has
notified Company thereof in accordance with the terms of Section 6 of the
Indemnification Agreement (hereinafter the "Proceeding");

         NOW, THEREFORE, Indemnitee hereby agrees that in consideration of
Company's advance payment of Indemnitee's Expenses incurred prior to a final
disposition of the Proceeding, Indemnitee hereby undertakes to reimburse Company
for any and all Expenses paid by Company on behalf of Indemnitee prior to a
final disposition of the Proceeding in the event that Indemnitee is determined
under the Applicable Document (within the meaning of the


                                       1

<PAGE>   15

Indemnification Agreement) OR APPLICABLE LAW to be required to repay such 
amounts to the Company, provided that if Indemnitee is entitled under the 
Applicable Document or applicable law to indemnification for some or a portion 
of such Expenses, Indemnitee's obligation to reimburse Company shall only be for
those Expenses for which Indemnitee is determined to be required to so repay 
such amounts to the Company pursuant to the Indemnification Agreement or 
applicable law.

         IF THE INDEMNITEE IS INVOLVED IN AN ADMINISTRATIVE PROCEEDING OR ACTION
INSTITUTED BY AN APPROPRIATE FEDERAL BANKING AGENCY AND REQUESTS THE COMPANY TO
PAY THE EXPENSES INCURRED BEFORE A FINAL ORDER IS ENTERED, THE INDEMNITEE SHALL
REIMBURSE THE COMPANY FOR ALL EXPENSES PAID BY THE COMPANY IF A FINAL ORDER IS
ENTERED (I) ASSESSING CIVIL MONEY PENALTIES; (II) REMOVING INDEMNITEE FROM
OFFICE OR PROHIBITING INDEMNITEE FROM PARTICIPATING IN THE CONDUCT OF THE
AFFAIRS OF THE COMPANY OR ITS AFFILIATES; OR (III) REQUIRING INDEMNITEE TO CEASE
AND DESIST FROM TAKING ANY AFFIRMATIVE ACTION DESCRIBED UNDER THE FEDERAL
DEPOSIT INSURANCE ACT OR OTHER APPLICABLE BANKING LAWS WITH RESPECT TO THE
COMPANY AND ITS AFFILIATES. THE INDEMNITEE HEREBY AGREES TO REIMBURSE THE
COMPANY FOR EXPENSES WHICH SUBSEQUENTLY ARE DEEMED "PROHIBITED INDEMNIFICATION
PAYMENTS", AS DEFINED IN 12 C.F.R. Section 359.1(1).

         Further, the Indemnitee agrees to reasonably cooperate with theCompany
concerning such Proceeding.

         IN WITNESS WHEREOF, the undersigned has set his hand this       day of
             , 19   

                                   INDEMNITEE



                                       2








<PAGE>   1
                                                                    EXHIBIT 10.9

                           [The Ohio Bank letterhead]


                                December 22, 1998


Mr. Jack W. Donaldson
7779 Hickory Lane
Findlay, Ohio 45840

Dear Jack:

This letter confirms and documents our discussions regarding your election to
terminate your employment with The Ohio Bank (the "Company"), accept the package
of separation benefits outlined below and provide consulting services to the
Company.

This letter will memorialize our agreement concerning the foregoing, as follows:

       1.     Your employment with the Company will formally end May 31, 1999.

       2.     All Company-provided employee pension benefits will cease on May
              31, 1999, however, you will retain any rights that are then-vested
              under the Company's employee pension benefit plans. You also will
              be entitled to any conversion rights provided by any insurer under
              the Company's group insurance plans, including any applicable life
              and disability insurance plans.

       3.     Beginning June 1, 1999, you and your current spouse will be
              provided with the coverage then being provided to ongoing Company
              employees under the Company's group health plan; this coverage
              will last until you (and in your spouse's case, your spouse) first
              becomes entitled to Medicare Part A (or a comparable government
              program). You will, of course, be responsible for any "employee"
              contributions, co-pay and deductible amounts normally paid by
              plan-covered employees and dependents.

       4.     The Company will pay you $110,000 in cash (less applicable
              withholding) in the form of severance pay. This amount will be
              paid on or before June 30, 1999. This severance pay constitutes
              full payment and satisfaction of all of your rights and claims
              against the Company (and any affiliated company), including rights
              to incentive pay, stock options, bonuses, accrued vacation pay,
              sick and/or holiday pay.

       5.     For a period of two years after termination of your employment, 
              you will make yourself available to provide such consulting
              services as may be requested of you from time to time by the
              President or Board of Directors of the Company, including service
              on the Board of Directors and committees of the Board. In addition
              to directors' fees, the Company will pay you $600,000 for your
              consulting services. 


<PAGE>   2


              This compensation will be paid in three installments - $125,000 on
              or before June 30, 1999, $235,000 on or before June 30, 2000 and
              the balance of $240,000 on or before June 30, 2001. You understand
              that director's fees and compensation for your consulting services
              are paid to you as an independent contractor and that you will be
              fully responsible for all federal, state and local taxes
              applicable to such compensation.

       6.     Without the Company's express approval, you will not, at any time
              prior to May 31, 2003, accept any other employment, or engagement
              as a proprietor, consultant, or partner, with any outside business
              or enterprise that competes with the Company within seventy-five
              (75) miles of the Hancock (Ohio) County Courthouse. You
              acknowledge and agree that the Company is entitled to specific
              performance of this provision, including an injunction to restrain
              you from competing with it.

       7.     You will not at any time use, reveal or divulge any confidential
              information about the Company. Confidential information means
              information that is not generally known and from which the Company
              derives actual or potential economic value because such
              information is not generally known by others. Confidential
              information includes, but is not limited to, sales and marketing
              information, customer account records, training and operations
              material and memoranda, personnel records, pricing and financial
              information relating to the business, accounts, customers,
              employees and affairs of the Company, financial data and lists of
              actual or potential customers.

       8.     You will sign, date and return the attached Release and Covenant 
              Not To Sue no earlier than May 31, 1999 and no later than June 15,
              1999.

Finally, the terms of this letter agreement shall remain confidential, and
neither you nor the Company will publish or publicize the terms of this letter
agreement in any manner. You will not discuss or reveal the terms of this
agreement to any persons other than you immediate family, your attorney and your
financial advisors. You will not disparage the Company, its parent, related
entities or affiliates, or its officers, directors, or employees. Likewise,
neither the Company not its officers, directors, or employees shall disparage
you.

                                         Yours truly,

                                         /S/ Richard R. Hollington, Jr.
                                         Richard R. Hollington, Jr.
                                         Chairman, The Ohio Bank


<PAGE>   3



I have carefully read, fully understand and agree to be bound by all the terms
of this letter agreement.


                                                /s/ Jack W. Donaldson
                                                --------------------------------
                                                Jack W. Donaldson


                                                --------------------------------
                                                Date



<PAGE>   1
                                                                   EXHIBIT 10.11

                                   AGREEMENT

     This Agreement ("Agreement") is made and entered into this 22 day of 
November, 1993 by and among The Citizens Banking Company ("Citizens"), Citizens
Bancshares, Inc. ("Bancshares") and their successors (together the "Companies"),
and Frank J. Koch (the "Executive") and is effective as of November 22, 1993.

I.   Recitals

     A.  The Executive is currently employed by Citizens in the capacity of
Executive Vice President and the Executive is one of the key executives of
Citizens.

     B.  The Executive agrees that in order to maintain consistency of 
management within Citizens, he will perform his duties as Executive Vice
President for a minimum of two years pursuant to this Agreement.

     C.  The Board of Directors of the Companies (the "Board") is encouraging 
the Executive to perform his assigned duties without distraction if Citizens
should face a potential Change-In-Control as defined below.

     D.  In consideration of the mutual promises contained herein and other 
good and valuable consideration, receipt of which is hereby acknowledged, the
Executive and the Companies have entered into this Agreement.

II.  Term of Agreement

     Except as otherwise provided herein, the Companies and the Executive agree
that the Executive will remain in the employ of Citizens until January 1, 1996;
provided, however, that commencing on January 1, 1995 and every other January
1st thereafter, the term of this Agreement shall automatically be extended for
two additional years unless at least ninety (90) days prior to such January 1st
date, Bancshares, Citizens or the Executive shall have given notice that it or
he does not wish to extend this Agreement. The "Term of Agreement" shall refer
to the period commencing an the date hereof and ending on January 1, 1996 (or
any extension thereof pursuant to the preceding sentence).

     During the Term of Agreement, the Companies shall:

     A.  pay the Executive, during the first year of the Term of Agreement, a
monthly salary at least equal to the Executive's highest base salary for any
month during the immediately preceding twelve (12) months and, during each
subsequent year of the Term of Employment, an annual salary (payable on at least
a monthly basis) at least equal to the Executive's salary for the immediately
preceding year plus an amount calculated in a manner at least as favorable to
the Executive as the manner in which the pay increases for other Citizens 
executives are calculated;

<PAGE>   2
     B.  at its sole discretion, pay to the Executive an annual bonus;

     C.  provide and maintain in full force and effect through existing plans or
through equivalent plans at least the types and amounts of group insurance
coverages (including conversion features) and benefits, including life, health,
disability and hospitalization insurance, and other health care benefits,
including medical, hospital and surgical benefits and health care benelits for
the Executive's family (collectively "Health Care Benefits"), to which the
Executive was entitled or the Health Care Benefits provided by the Company to
its other executives (whichever would result in greater Health Care Benefits to
the Executive); and

     D.  agree that Executive will be a participant in the Citizens Profit
Sharing Plan and Trust on the same basis as all other employees.

     Provided, however, the Executive may be terminated in a
non-Change-In-Control situation only if the Executive commits any material act
of dishonesty, discloses confidential information, or is guilty of gross 
carelessness materially injurious to the Companies, or misconduct. Misconduct
shall mean failure by Executive to substantially perform his duties after a
written demand for improved performance is delivered by the Chief Executive
Officer of Citizens to the Executive.

     NOW, THEREFORE, in consideration of the promises and the mutual covenants
and agreements hereinafter set forth, the Companies and the Executive hereby
agree as follovs:

     1.  a.   Change-In-Control, for purposes of this Aqreement, shall be deemed
to occur at such time as:

         (i)  any person, partnership, corporation, or other entity becomes a
     Beneficial Owner, directly or indirectly, of shares of Bancshares' voting
     stock representing at least twenty (20%) percent or more of Bancshares
     issued and outstanding voting stock; or

         (ii) one-half or more of the membership of the Board consists of
     members not recommended for membership by the Companies or the Board.   

         b.   Beneficial Owner, for purposes of this Agreement, shall have the
meaning ascribed to the term in Rules 13d-3 and 13-d-5(b)(1) of the General
Rules and Regulations (the "rules") under the Securities Exchange Act of 1934
(the "1934 Act") after application of the attribution or constructive ownership
rules contained in Section 318(a) ot the Internal Revenue Code of 1986.

         c.   Voting stock, for purposes of this Agreement, shall mean any 
shares of capital stock of Bancshares entitled to vote generally in the election
of directors and any securities of Bancshares which are convertible into voting
stock at the option of the holder thereof.

         d.   The computational procedure of Rule 13d-3(d)(1) of the Rules under
the 1934 Act, as supplemented by the attribution rules of


<PAGE>   3
Section 318(a) of the Internal Revenue Code of 1998, shall be used to compute
the percentage of Bancshares' voting stock of which a person is deemed a
Beneficial Owner for the purpose of determining when a Change-In-Control occurs.

III. Change-In-Control

     A.  In the event of a Change-In-Control, Citizens shall continue to
employ the Executive in an executive position until the earlier of (i) the date
upon which the Executive would attain age 65 ("Normal Retirement Age") and (ii)
the date that is twenty-four (24) months after the date of the Change-In-Control
(the "Change Term") upon the terms and conditions hereinafter set forth.

     B.  During the Change Term the Companies shall:

         1.   pay the Executive, during the first year of the Term of Agreement,
a monthly salary at least equal to the Executive's highest base salary for any
mouth during the twelve (12) months immediately preceding the Change-In-Control
and, during each subsequent year of the Term of Employment, an annual salary
(payable on at least a monthly basis) at least equal to the Executive's salary
for the immediately preceding year plus an amount calculated it a manner at
least as favorable to the Executive as the matter in which the pay increases for
other Citizens executives are calculated;


         2.   pay the Executive an annual bonus calculated in a manner at least
as favorable to the Executive as the manner in which (i) the last annual bonus
paid to the Executive prior to the Change-In-Control was calculated, or (ii)
the annual bonus paid to the Executive by the Company in the immediately 
preceding year (whichever would result in a greater payment to the Executive);

         3.   provide and maintain in full force and effect through existing
plans or through equivalent plans at least the types and amounts of group
insurance coverages (including conversion features) and benefits, including
life, health, disability and hospitalization insurance, and other health care
benefits, including medical, hospital and surgical benefits and health care
benefits for the Executive's family (collectively "Health Care Benefits") , to
which the Executive was entitled immediately prior to the Change-In-Control or
the Health Care Benefits provided by the Company to its other executives after a
Change-In-Control (whichever would result in greater Health Care Benefits to the
Executive); and

         4.   agree that Executive will be a participant in Citizens Profit
Sharing Plan and Trust on the same basis as all other employees.

     C.  In the event of a Termination of Employment (as hereinafter 
defined in Item F), the Companies shall pay or cause to be paid to the
Executive, or after the Executive's death, his designated beneficiary, or it
there be none, his personal representative, executor or administrator (for the
purposes of this paragraph, the term "Executive" shall include the Executive's
designated beneficiary, personal


<PAGE>   4

representative, executor or administrator), during each year of the
period beginning on the date of the Termination of Employment and ending on
the earlier of (i) the date upon which the Executive would attain Normal
Retirement Age and (ii) the date that is twenty-four (24) months from the date
of the Change-In-Control (the "Payment Period") an amount determined as follows:

         1.   a monthly salary equal to the greater at the Executive's highest
     salary from Citizens for any month during the twelve (12) months
     immediately preceding (a) the Change-In-Control and (b) the Termination of
     Employment ("Annual Base Compensation"), plus

         2.   a Citizens Profit Sharing Plan and Trust contribution on the same
     basis as all other employees, provided continued participation is possible
     under the terms and provisions of the plan, plus

         3.   the greater at the average of the Annual bonuses received by the
     Executive from Citizens during the three (3) calendar years immediately
     preceding (a) the Change-In-Control and (b) the Termination of Employee
     ("Annual Bonus"), minus

         4.   any amount the Executive receives during such year pursuant to
     Citizens long-term disability policy.

         Such Payments shall be made in equal monthly installments, payments due
for any part of the Payment Period which is less than one year shall be computed
an a pro-rata basis.

         Notwithstanding the foregoing, the Executive may elect, within sixty
(60) days after the date of the Termination of Employment, to receive a single
lump-sum payment in an amount equal to the present value of the total unpaid
amount due to the Executive under this paragraph, such present value as
determined by discount based upon an interest rate two (2) percentage points
less than the National prime rate in effect at the date of Termination of
Employment. If the Executive elects to receive a single lump-sum payment, the
company shall pay the Executive the amount of such payment within thirty (30)
days following the date of such election by the Executive.

         The Executive's right to receive compensation from the Companies
pursuant to this agreement shall not be affected by the Executive's receipt of
compensation in connection vith any subseqatut employment by any other
corporation or other entity, provided that, if such corporation or other entity
is engaged in a business directly competitive with that of the Companies and
located in Columbiana, Carroll, Stark, Jefferson Counties, or the Village at
Sebring at the time of a Change-In-Control or any Successor Organization the
Companies may offset from, but only from, any unpaid monthly installments at
of the Executive's compensation under this paragraph, the amount of salary or
other direct monetary compensation paid to the Executive for such month by such
other corporation or other entity.


<PAGE>   5

         D.   In the event that following a Change-In-Control the Executive
ceases to be employed by Citizens for any reason, including retirement at or
at any time before Normal Retirement Age, Termination of Employment or
dismissal by the Companies for reasons other than misconduct (pursuant to the
procedure set out in Item III C hereof), the Executive and/or his spouse shall
continue to receive from Citizens, until the date the Executive attains or would
have attained Normal Retirement Age, Health Care Benefits equivalent to the
greater of the Health Care Benefits to which the Executive was entitled  (i)
immediately preceding the date the Executive ceased to be employed by Citizens
and (ii) immediately preceding the Change-In-Control (proved that Citizens may
reduce such Health Care Benefits to the extent of any duplication of the types
and amounts of coverages and benefits provided to the Executive in connection
with any subsequent employment by any other corporation or other entity prior to
the Executive attaining Normal Retirement Aqe), and from and after the date the
Executive attains or would have attained Normal Retirement Age, the Executive
and/or his spouse shall receive the Health Care Benefits to which he would be
entitled as a retired executive employee under the Companies' benefit plans and
programs in effect immediately prior to the Change-In-Control or immediately
prior to the date the Executive ceased to be employed by Citizens (whichever
would result in greater benefits to the Executive). Misconduct shall mean
failure by Executive to substantially perform his duties after a written demand
for improved performance is delivered by the Chief Executive Officer of Citizens
to the Executive.

         E.   In the event that following a Change-in-Control, the Companies
require the Executive to relocate his office more than 70 miles from Salem,
Ohio, city limits, or 40 miles from Salineville, Ohio, city limits, any personal
moving expense the Executive incurs shall be at the Companies' expense, in
accordance with the Companies' relocation policy as in effect on the date
hereof, or if the Companies have no relocation policy, then the Executive
shall receive reimbursement of domicile expenses connected with a relocation not
to exceed $5,000.00 (whichever would result in greater benefits to
the Executive).

         F.   Termination of Employment, for the purposes of this Agreement, 
shall occur if the Executive's employment in an executive position is terminated
during the Term of Employment:

         1.   by the Companies for any reason, including disability or 
     incapacity, but excepting misconduct by the Executive, or

         2.   by the Executive for cause which shall be deemed to exist upon the
     occurrence of any of the following events;
              a.   the Companies request the Executive's resignation or 
     retirement (other than retirement upon reaching Normal Retirement Age); or
              b.   a change in the location of the Executive's place of
     employment or office to a site more than 70 miles from Salem, Ohio, city
     limits or 40 miles from Salineville, Ohio, city limits at time of the
     change; or
              c.   the breach by the Companies of any provision of this 
     Agreement.

<PAGE>   6
              In the event of the death of the Executive during the Term at
         Employment, in addition to the amounts, if any, payable pursuant to
         Item B hereof, the estate of the Executive shall receive benefits at
         least equal to the greater of:

              (i)  such other benefits which would have been payable to the
         estate of Executive by the Companies if such event had occurred
         immediately prior to the date of the Change-In-Control and

              (ii) such other benefits payable to the estate of the Executive
         under benefit plans and programs at the Companies existing as of the
         date of the Executive's death,

                   d. within six (6) months of a Change-In-Control the
         Executive, at his option, may terminate his employment and receive 12
         months' salary equal to the Executive's monthly salary for the month
         prior to the Change-In-Control, plus an amount equal to the Executive's
         previous year's bonus divided by 12, times the number of full months
         the Executive has worked during the calendar year in which the
         Executive terminates his employment.

         G.   The compensation and benefits provided pursuant to Item III 
hereof, to the extent received by the Executive, are granted to the Executive in
lieu of any compensation, benefits or amounts the Executive might otherwise be
entitled to under the Companies' severance policy or otherwise from the
Companies by reason of a Termination of Employment. Except as otherwise set
forth herein, this Agreement. shall not in any way alter the rights and
obligations of the Companies and the Executive under any of the Companies'
benefit plans.

         H.   The rights of the Executive under this Agreement shall not be
transferable by assignment or otherwise, shall not be subject to cummutation or
encumbrance and shall not be subject to the claims of the creditors of the
Executive.

         I.   This Agreement shall be binding upon and inure to the benefit of 
the Executive, his designated beneficiary, personal representative, executor or
administrator, the Companies and any successor, including any organization
which shall succeed to substantially all of the business and property of the
Companies, whether by means of merger, consolidation, acquisition or
substantially all of the assets of the Companies or otherwise, including by
operation of law (a "Successor Organization"). The Companies shall not merge,
reorganize, consolidate, sell all or substantially all of its assets, combine by
operation of law or otherwise, to or with any Successor Organization, unless, as
a condition to such transaction, the Successor Organization assumes the
obligations of the Companies under this Agreement. For purposes of this
Agreement the terms Citizens and Bancshares shall include any Successor
Organization. Also, for purposes of this Agreement, although the term Citizens
sometimes refers to a subsidiary of Bancshares (or any combinations thereof)
where such subsidiary is prohibited by law or regulation from entering into
such a contract with the Executive, the contract shall nevertheless be the
enforceable, legal obligation of


<PAGE>   7



Bancshares, the sole shareholder of such subsidiary or the sole shareholder of a
parent of such subsidiary.

         J.   This Agreement supercedes and makes void any prior agreement 
between the parties and sets forth the entire agreement and understandinq of the
parties hereto with respect to the matters covered hereby and may not be
amended or modified except by further written agreement of the parties. Any
beneficiary designation, or any termination or amendment to any existing
designation under this Agreement shall be by written instrument executed by the
Executive and delivered to the Companies.

         K.   This Agreement has been made in and shall be governed and 
construed in accordance with the laws of the State of Ohio.

         L.   The invalidity of any term of the Agreement shall not invalidate 
or otherwise affect any other term of this Agreement.

IV. Arbitration

         Any dispute or controversy arising under or in connection with this
Agreement shall be settled exclusively by arbitration in Lisbon, Ohio, in
accordance with the rules of the American Arbitration Association then in
effect; provided that all arbitration expenses shall be borne by the Companies.
Notwithstanding the pendency of any dispute or controversy concerning
termination or the effects thereof, the Companies will continue to pay the
Executive his full compensation in effect immediately before any Notice of
Termination giving rise to the dispute was given (including, but not limited to,
base salary and incentive pay) and continue him as a participant in all
compensation, benefit and insurance plans in which he was then participating,
until the dispute is finally resolved. Amounts paid under this paragraph are in
addition to all other amounts due under this Agreement and shall not be offset
against or reduce any other amounts due under this Agreement. Judgment may be
entered on the arbitrators' award in any court having jurisdiction; provided,
however, that the Executive shall be entitled to seek specific performance of
his right to be paid until the Date of Termination during the pendency of any
dispute or controversy arising under or in connection with this Agreement.

<PAGE>   8
     


     IN WITNESS WHEREOF, the undersigned have set their hands and seals or 
caused this Agreement to be signed by a duly authorized officer, on the date 
first set out above.


ATTEST:                                      CITIZENS BANCSHARES, INC. &
                                             THE CITIZENS BANKING COMPANY


\s\ Theresa S. Keating                      BY: \s\ Marty E. Adams
- ----------------------------                    --------------------------------
                                                Marty E. Adams
                                                President & CEO

                                             BY: \s\ Raymond J. Lowry
                                                --------------------------------
                                                Raymond J. Lowry
                                                Chairman of Board's Compensation
                                                Committee


WITNESS:                                     EXECUTIVE:

\s\ Theresa S. Keating                       \s\
- ----------------------------                 -----------------------------------

<PAGE>   1
                                                                   EXHIBIT 10.12

                           CHANGE IN CONTROL AGREEMENT


         This Change in Control Agreement is entered into           , 19  , by 
and between Sky Financial Group, Inc. ("Company") and               , a resident
of          , Ohio ("Employee").

                                   ARTICLE I.
                                   EMPLOYMENT

         Section 1. Employment. Company shall employ Employee and Employee shall
accept employment with Company upon the terms and subject to the conditions set
forth in this Agreement.

         Section 2. Duties and Services. Employee shall be employed in the
capacity of and shall have such other duties and responsibilities as are
designated by the Board of Directors from time to time consistent with
Employee's level of authority and responsibility with Company. Employee agrees
to perform designated duties and services and to devote Employee's full and
exclusive business time, skill, best efforts and attention (excluding vacations
and other leaves of absence) to promote the business of Company and to perform
faithfully to the fullest extent of Employee's ability all of Employee's duties
under this Agreement. Employee further agrees, upon any appointment or election
to the Board of Directors of Company, Company's parent, or any of Company's
affiliates, to accept such appointment or election and to devote Employee's best
efforts to perform any duties as director.

         Section 3. Term. The term of this Agreement ("Employment") shall begin
on the date above and shall continue until the first anniversary of the
Agreement, unless sooner terminated pursuant to Article II, Section 1. This
Agreement shall be automatically renewed for additional one-year periods
following the original term, at the end of each subsequent one-year period, upon
the same terms and conditions.

         Section 4. Place of Employment. Employee's initial place of employment
is                . However, Company may require that Employee work at any other
place as Company may direct. If Employee is required to relocate, however, 
Company shall pay Employee's reasonable moving expenses actually incurred in 
accordance with Company policy.

         Section 5. Compensation. Company shall pay to Employee as compensation
for services rendered during the Employment such salary, bonus, commission or
other remuneration as the Board of Directors of Company may determine from time
to time.

         Section 6. Adherence to Standards. Employee shall comply with the
policies, standards, rules and regulations of Company from time to time
established including, but not limited to, rules established by Company covering
hours of work, vacation periods, sick leave and other terms and conditions of
the Employment.

<PAGE>   2

         Section 7. Expense Reimbursement. Company shall reimburse Employee for
authorized travel and other reasonable expenses actually incurred in promoting,
fostering, furthering and perpetuating the business of Company upon receipt and
approval by Company of expense vouchers prepared by Employee and submitted to
Company promptly after such expenses are incurred.

         Section 8. Benefits. Employee shall be included, to the extent
eligible, in any and all benefit plans and policies which apply to Company's
salaried employees generally.

         Section 9. Authority. Except for the authority granted to the officers
of Company by Company's Code of Regulations, as amended from time to time,
Employee has no authority to commit or obligate Company, financially or
otherwise, without Company's prior written approval.

         Section 10. Other Employment. Employee shall refrain from acting in any
other employment or consulting capacity without the prior written consent of
Company. It is Company's intention that Employee devote all of Employee's work
effort towards the fulfillment of Employee's obligations under this Agreement.
Employee may in any event hold securities in any publicly held corporation and
may serve as a member of the board of directors of any business which is not in
competition with Company.


                                   ARTICLE II.
                            TERMINATION OF EMPLOYMENT

         Section 1. Termination for Cause. If Employee is terminated for
"cause", then Company's obligation under this Agreement to make any further
payments to Employee or to continue any benefits shall cease. "Cause" shall
mean:

         A.       Misappropriating any funds or property of Company;
         B.       Being convicted of a felony;
         C.       Mismanaging the assets of Company;
         D.       Inability to fulfill the duties of the position for a period 
                  longer than three consecutive months;
         E.       Gross incompetence, gross insubordination,  willful 
                  misconduct,  dishonesty, or gross neglect in the performance 
                  of the duties of the position;
         F.       Material breach of this Agreement;
         G.       Being under the habitual influence of alcohol or other drugs;
                  or
         H.       (i). If Employee is suspended from office or temporarily
                  prohibited from participating in the conduct of Company's
                  affairs by any regulatory agency, Company's obligations under
                  this Agreement shall be suspended upon suspension or
                  prohibition. Once the matter is resolved and Employee is
                  permitted to return to his or her position, the Company, in
                  its sole discretion, may reinstate, in whole or in part, any
                  of the obligations.

<PAGE>   3

                  (ii). If Employee is removed from office and/or permanently
                  prohibited from participating in the conduct of Company's
                  affairs by any regulatory agency, Company's obligations under
                  this Agreement shall terminate, but vested rights of the
                  parties shall not be affected.

         Section 2. Involuntary Termination or Diminution of Status Following
         Change in Control. Employee shall be entitled to certain payments and
         benefits upon involuntary termination or Diminution of Status, as
         defined below, following a Change in Control.

                  A. Compensation. In the event of involuntary termination or
                  Diminution of Status of Employee's employment other than for
                  cause, as defined above, in connection with or within two
                  years after a Change in Control, Company shall pay to Employee
                  a lump sum cash amount or monthly installments, as Employee
                  chooses, equal to the product of ____ times the Employee's
                  Average Annual Compensation. For purposes of this
                  subparagraph, Average Annual Compensation shall mean either:
                  (i) the average total annual compensation (salary and
                  incentive) payable during the preceding two years; or (ii) in
                  the event that the Employee shall have been employed by the
                  Company less than two years, the annualized average total
                  compensation (salary and incentive) payable during the period
                  in which Employee has been employed by the Company. If
                  Employee chooses to receive this payment in a lump sum, this
                  amount shall be paid within 30 days after the effective date
                  of involuntary termination or Diminution of Status. If
                  Employee chooses to receive this payment in a series of equal
                  monthly installments over a _____-year period, payments shall
                  be made in accordance with the payroll practice of Company but
                  no less frequently than once a month. These payments are
                  subject to reduction to the extent necessary so that they do
                  not constitute "excess parachute payments" under the Internal
                  Revenue Code and so that they violate no applicable law
                  governing executive compensation.

                  B. Continuation of Benefits. In addition, all ESOP
                  contributions to Employee's account, all stock option grants
                  which are not vested at the date of termination or Diminution
                  of Status, and all amounts credited to Employee's SERP account
                  at that time, if any, shall immediately vest and become due
                  and payable by Company. During the _____-year period after
                  involuntary termination or Diminution of Status of Employee's
                  employment, Employee shall also be entitled to participate in
                  the Company's health or medical plan, at a level identical to
                  that in effect at the time of termination or Diminution of
                  Status at Company's expense, regardless of whether Company is
                  partially or fully self-insured. Company will continue payment
                  for these benefits unless impermissible under applicable law.
                  These payments are subject to reduction to the extent
                  necessary so that they do not constitute "excess parachute
                  payments" under the Internal Revenue Code and so that they
                  violate no applicable law governing executive compensation.
                  These payments may be terminated if Employee receives
                  comparable benefits through other full-time employment with an
                  unaffiliated employer. Upon expiration of this _____-year
                  period, Employee shall be permitted to participate in
                  Company's 

<PAGE>   4


                  health or medical plan, at Employee's cost (which cost shall 
                  be equal to that charged to COBRA participants) until Employee
                  is eligible for Medicare.

                  C. Continuation of Life and Long-Term Disability Benefits.
                  During the         year period after involuntary termination
                  or diminution of status of Employee's employment, Employee
                  shall also be entitled to participate in the Company's life
                  and long-term disability plan or plans, at a level identical
                  to that in effect at the time of termination or diminution of
                  status, at Company's expense, regardless of whether Company is
                  partially or fully self-insured. Company will continue payment
                  for these benefits unless impermissible under applicable law.
                  These payments are subject to reduction to the extent
                  necessary so that they do not constitute "excess parachute
                  payments" under the Internal Revenue Code and so that they
                  violate no applicable law governing executive compensation.
                  These payments may be terminated if Employee receives
                  comparable benefits through other full-time employment with an
                  unaffiliated employer. Upon expiration of this           year
                  period, Employee shall be permitted to participate in
                  Company's life or long-term disability plan or plans, at
                  Employee's costs (which cost shall be equal to the Employee
                  cost charged to other employees of the Company) until
                  Employee's death.

         Section 3.  Definitions.

          A.      "Change in Control" means any one or more of the following 
                  events: (a) the merger, consolidation or sale of substantially
                  all of the assets of Company with or into any other
                  corporation, other than a transaction in which substantially
                  all of the shareholders of the Company receive 50% or more of
                  the common stock of the corporation resulting from the
                  transaction; (b) in excess of 24.99% of the outstanding common
                  stock of Company is owned, held or controlled by an entity,
                  person or group acting in concert with the power to control
                  the Company as that term is defined in Rule 405 of the
                  Securities Act of 1933; (c) the sale or exchange of in excess
                  of 24.99% of the assets of Company to any entity, person, or
                  group acting in concert; (d) the recapitalization,
                  reclassification of securities or reorganization of Company
                  which has the effect of either subpart (b) or (c) above; (e)
                  the issuance by Company of securities in an amount in excess
                  of 24.99% of the outstanding common stock of Company to any
                  entity, person, or group acting in concert and intending to
                  exercise control of Company or (f) the removal, termination or
                  retirement of more than 49% of the members of the Board of
                  Directors.

          B.      "Diminution of Status" means a material diminution of or
                  interference with Employee's duties, responsibilities and
                  benefits. By way of example and not by way of limitation, any
                  of the following actions, if unreasonable or materially
                  adverse to Employee, shall constitute diminution or
                  interference unless consented to in writing by Employee: (1) a
                  reduction in the size or a change in the location

<PAGE>   5

                  of Employee's office; (2) a reduction or adverse change in the
                  scope or nature of the secretarial or other administrative
                  support of Employee; (3) a reduction or adverse change in
                  Employee's title or decision-making responsibilities; (4) a
                  reduction in the number or seniority of other Company
                  personnel reporting to Employee, other than as part of a
                  Company-wide reduction in staff, or a reduction in the
                  frequency with which personnel are to report to Employee; (5)
                  an increase in the number of, or a decrease in the seniority
                  of, the persons (other than the Board of Directors) to whom
                  Employee must report; or an increase in the frequency of, or
                  in the nature of matters with respect to which, reports by
                  Employee shall be required; (6) a reduction or adverse change
                  in the salary, perquisites, benefits, contingent benefits or
                  vacation time which had previously been provided to Employee,
                  other than as part of an overall program applied uniformly and
                  with equitable effect to all members of the senior management
                  of the Company; and (7) a material increase in the required
                  hours of work or the workload of Employee.


                                  ARTICLE III.
                                  OTHER TERMS

         Section 1. Governing Law. This Agreement and all questions relating to
its validity, interpretation, performance and enforcement shall be governed by
the laws of the State of Ohio.

         Section 2. No Duty to Mitigate. Employee has no duty to mitigate the
payment of any compensation or benefits received under this Agreement and any
amount earned by Employee after termination or Diminution of Status shall not
reduce the amount owed by Company pursuant to the terms of this Agreement.

         Section 3. Damages. Employer and Employee agree that no damages shall
be payable upon Involuntary Termination or Diminution of Status prior to a
Change in Control, regardless of whether Involuntary Termination or Diminution
of Status occur with or without notice, or with or without reason. If such
action occurs after a Change in Control, Article II, Section 2 is controlling on
the issue of damages.

         Section 4. Entire Agreement. This Agreement constitutes the entire
agreement between the parties on this subject matter and may not be modified or
amended except in a writing signed by both parties. All prior agreements,
representations, statements, negotiations and understandings are superseded.
This Agreement may not be modified or amended after a Change in Control.

         Section 5. Assignability. This Agreement shall be freely assignable in
whole or in part by Company but may not be assigned by Employee.

         Section 6. Waiver. Neither the failure nor any delay on the part of
Company to exercise any right, remedy, power or privilege hereunder shall
operate as a waiver, nor shall any 


<PAGE>   6

single or partial exercise of any right, remedy, power or privilege preclude an
other or further exercise of the same or any other right, remedy, power, 
privilege, nor shall any waiver of any right, remedy, power or privilege with 
respect to any occurrence be construed as a waiver of such right, remedy, power 
or privilege with respect to any other occurrence.

         Section 7. Binding Obligation. This Agreement shall be binding on
Employee's heirs, legal representatives and assigns and shall be binding on any
successors and assigns of Company. All terms and conditions of this Agreement
shall survive the termination of the Employment.

         Section 8. Severability. All clauses of this Agreement are distinct and
severable, and if any clause shall be deemed invalid, illegal or unenforceable
in whole or in part, for any reason, and such clause cannot be amended so as to
make it enforceable, it shall not affect the legality or enforceability of any
other clause of this Agreement.

         Section 9. Counterparts. This Agreement may be executed in more than
one counterpart and each counterpart shall be considered an original.

         Section 10. Headings. The paragraph headings are for convenience only
and shall not in any way affect the interpretation or enforceability of any
provision of this Agreement.

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

WARNING - READ CAREFULLY - THIS AGREEMENT AFFECTS THE CONDITIONS OF YOUR
EMPLOYMENT.


                                            SKY FINANCIAL GROUP, INC.


                                            By:                                 
                                               ---------------------------------

                                            Its:                                
                                                --------------------------------


                                            EMPLOYEE


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




<PAGE>   1
                                                                      EXHIBIT 13
                                      1998
                            ANNUAL REPORT SUPPLEMENT
 
                            Sky Financial Group LOGO
<PAGE>   2
 
                           SKY FINANCIAL GROUP, INC.
                         1998 ANNUAL REPORT SUPPLEMENT
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------
                          CONTENTS                            PAGE
- ------------------------------------------------------------------
<S>                                                           <C>
A Message to our Shareholders...............................   S-1
Financial Highlights........................................   S-2
Shareholder Information.....................................   S-3
Corporate Information.......................................   S-4
Selected Quarterly Data.....................................   S-5
Sky Financial Group, Inc. Summary of Financial Data.........   S-6
Management's Discussion and Analysis and Statistical
  Information...............................................   S-7
Report of Independent Auditors..............................  S-25
Consolidated Balance Sheets.................................  S-26
Consolidated Statements of Income...........................  S-27
Consolidated Statements of Changes in Shareholders'
  Equity....................................................  S-28
Consolidated Statements of Comprehensive Income.............  S-29
Consolidated Statements of Cash Flows.......................  S-30
Notes to Consolidated Financial Statements..................  S-31
- ------------------------------------------------------------------
</TABLE>
 
                         A MESSAGE TO OUR SHAREHOLDERS
 
This Annual Report Supplement to our Proxy Statement contains our audited
financial statements, management's discussion and analysis and other information
previously presented in our annual report to shareholders. This Supplement
contains all of the information that regulations of the Securities and Exchange
Commission (the "SEC") requires to be presented in annual reports to
shareholders. For legal purposes, this Supplement is part of the Sky Financial
Group, Inc. Annual Report to Shareholders. Although attached to our Proxy
Statement, this Supplement is not part of our Proxy Statement, is not deemed to
be soliciting material, and is not deemed to be filed with the SEC except to the
extent that it is expressly incorporated by reference in a document filed with
the SEC.
 
Our 1998 Annual Report to Shareholders accompanies the Proxy Statement. That
report presents the financial results of our company in a format and level of
detail that we believe our shareholders will find useful and informative.
Shareholders who would like to receive more detail than provided in the
following Annual Report Supplement are invited to request our Annual Report on
Form 10-K.
 
Our Annual Report on Form 10-K, as filed with the SEC, will be provided without
charge to any shareholder upon written request to Sky Financial Group, Inc.
Shareholder Relations Department, 10 East Main Street, Salineville, Ohio 43945.
 
                                       S-1
<PAGE>   3
 
                              FINANCIAL HIGHLIGHTS
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
             (Dollars in thousands,                                                         Percentage
        except per share and ratio data)                   1998             1997              Change
<S>                                                     <C>              <C>              <C>        <C>
- --------------------------------------------------------------------------------------------------------
FOR THE YEAR
Operating earnings(1)............................       $   65,787       $   57,934          13.6%
Net income.......................................           17,808           59,320         (70.0)
Return on average assets(1)......................             1.40%            1.31%
Return on average common equity(1)...............            17.31            15.66
 
PER COMMON SHARE DATA
Diluted operating earnings(1)....................       $     1.44       $     1.24          16.1%
Basic net income.................................             0.39             1.29         (69.8)
Diluted net income...............................             0.39             1.27         (69.3)
Dividends........................................             0.65             0.51          27.5
Book value at year end...........................             7.64             8.45          (9.6)
 
AT YEAR END
Assets...........................................       $4,815,121       $4,562,303           5.5%
Loans............................................        3,355,881        3,144,439           6.7
Deposits.........................................        3,832,662        3,662,941           4.6
Shareholders' equity.............................          343,842          387,278         (11.2)
 
AVERAGE FOR THE YEAR
Assets...........................................       $4,705,789       $4,411,975           6.7%
Loans............................................        3,269,830        3,086,137           6.0
Deposits.........................................        3,749,280        3,568,474           5.1
Shareholders' equity.............................          380,120          376,398           1.0
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
        QUARTERLY FINANCIAL HIGHLIGHTS                First        Second         Third        Fourth
<S>                                                  <C>           <C>           <C>           <C>
- ------------------------------------------------------------------------------------------------------
1998
Net interest income...........................       $45,669       $47,047       $46,770       $47,638
Provision for credit losses...................         1,976         4,411         2,272        16,309
Net income....................................        13,217        15,404        16,833       (27,646)
Operating earnings(1).........................        16,067        15,997        16,833        16,890
 
Basic net income per share....................       $  0.29       $  0.34       $  0.37       $ (0.61)
Diluted net income per share..................          0.29          0.34          0.37         (0.61)
Diluted operating earnings per share(1).......          0.35          0.35          0.37          0.37
 
1997
Net interest income...........................       $43,998       $45,045       $45,571       $46,000
Provision for credit losses...................         2,762         1,740         2,138         4,288
Net income....................................        16,836        14,838        15,289        12,357
Operating earnings(1).........................        13,368        14,838        15,419        14,309
 
Basic net income per share....................       $  0.37       $  0.32       $  0.33       $  0.27
Diluted net income per share..................          0.36          0.32          0.33          0.27
Diluted operating earnings per share(1).......          0.28          0.32          0.33          0.31
- ------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) For comparability purposes, certain ratios and financial data exclude
    non-recurring gains, merger and restructuring expenses and merger related
    provisions for credit losses. After-tax non-recurring items reduced net
    income $48.0 million in 1998 and increased net income $1.4 million in 1997.
 
                                       S-2
<PAGE>   4
 
                            SHAREHOLDER INFORMATION
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
       QUARTERLY COMMON STOCK PRICES,                              Book      Dividend
            DIVIDENDS AND YIELDS                                 Value per     per      Dividend
                    1998                        High     Low       Share      Share      Yield
<S>                                            <C>      <C>      <C>         <C>        <C>      <C>
- ----------------------------------------------------------------------------------------------------
Fourth Quarter...............................  $32.00   $25.23     $7.64      $0.21       2.94%
Third Quarter................................   33.19    23.19      8.59       0.145      2.06
Second Quarter...............................   34.31    27.95      8.31       0.145      1.86
First Quarter................................   34.66    31.25      8.22       0.145      1.76
1997
- ----------------------------------------------------------------------------------------------------
Fourth Quarter...............................  $34.55   $23.75     $8.45      $0.14       1.92%
Third Quarter................................   25.00    23.41      8.29       0.13       2.15
Second Quarter...............................   25.34    16.48      8.01       0.12       2.31
First Quarter................................   18.06    14.77      7.89       0.12       2.93
- ----------------------------------------------------------------------------------------------------
</TABLE>
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------
                     STOCK INFORMATION                           Common
                    At December 31, 1998                         Stock
<S>                                                           <C>
- --------------------------------------------------------------------------
Shares authorized...........................................   150,000,000
Shares issued...............................................    45,082,890
Treasury shares.............................................        57,063
Number of shareholders of record............................        18,264
Closing market price per share..............................        $26.44
Book value per share........................................         $7.64
Stock exchange..............................................        NASDAQ
Stock symbol................................................          SKYF
- --------------------------------------------------------------------------
</TABLE>
 
DIVIDEND REINVESTMENT PLAN
 
The Company offers a Dividend Reinvestment Plan which allows shareholders to
reinvest their Sky Financial Group, Inc. dividends in additional Company common
stock at the prevailing market price. The plan has 5,950 participants, or 32.6
percent of our common shareholders of record. Plan information may be obtained
by calling the Shareholder Relations Department at (800) 576-5007, or by
writing: Sky Financial Group, Inc. Dividend Reinvestment Plan, 10 East Main
Street, Salineville, Ohio 43945.
 
                                       S-3
<PAGE>   5
 
                             CORPORATE INFORMATION
 
<TABLE>
<S>                              <C>                                    <C>           <C>
- ----------------------------------------------------------------------------------------------------
Annual Meeting
Place:.......................    Renaissance Cleveland Hotel            Date:         April 21, 1999
                                 Cleveland, Ohio                        Time:         9:30 a.m.
Headquarters
Write:.......................    Sky Financial Group, Inc.              Telephone:    (419) 327-6300
                                 221 South Church Street
                                 P.O. Box 428
                                 Bowling Green, Ohio 43402
Shareholder Relations
and Form 10-K
Write:.......................    Sky Financial Group, Inc.              Telephone:    (800) 576-5007
                                 Shareholder Relations Department
                                 10 East Main Street
                                 Salineville, Ohio 43945
Investor Relations
Write:.......................    Kelly Semer                            Telephone:    (419) 327-6305
                                 Sky Financial Group, Inc.
                                 221 South Church Street
                                 P. O. Box 428
                                 Bowling Green, Ohio 43402
Transfer Agent
Write:.......................    The Bank of New York                   Telephone:    (888) 683-4901
                                 Receive and Deliver Dept.-11W
                                 P. O. Box 11002
                                 Church Street Station
                                 New York, New York, 10286
Online Information
Internet:....................    Information concerning the
                                 Company and its affiliates can
                                 also be found on our website at
                                 http://www.skyfi.com
</TABLE>
 
                                       S-4
<PAGE>   6
 
                            SELECTED QUARTERLY DATA
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
             Quarter Ended
         (Dollars in thousands,
         except per share data)           December 31    September 30    June 30    March 31
<S>                                       <C>            <C>             <C>        <C>
- --------------------------------------------------------------------------------------------
1998
Net interest income.....................    $47,638        $46,770       $47,047    $45,669
Provision for credit losses.............     16,309          2,272         4,411      1,976
Net income (loss).......................    (27,646)        16,833        15,404     13,217
Earnings (loss) per common share:
  Basic.................................      (0.61)          0.37          0.34       0.29
  Diluted...............................      (0.61)          0.37          0.34       0.29
Return on average total assets(1).......         --           1.41%         1.32%      1.17%
Return on average common shareholders'
  equity(1).............................         --          17.54         16.68      14.21
- --------------------------------------------------------------------------------------------
1997
Net interest income.....................    $46,000        $45,571       $45,045    $43,998
Provision for credit losses.............      4,288          2,138         1,740      2,762
Net income..............................     12,357         15,289        14,838     16,836
Earnings per common share:
  Basic.................................       0.27           0.33          0.32       0.37
  Diluted...............................       0.27           0.33          0.32       0.36
Return on average total assets(1).......       1.09%          1.35%         1.36%      1.60%
Return on average common shareholders'
  equity(1).............................      12.98          16.06         16.44      18.95
- --------------------------------------------------------------------------------------------
</TABLE>
 
(1) Calculated on an annualized basis.
 
     The following discussion and analysis represents a review of Sky Financial
Group, Inc.'s consolidated financial condition and results of operations. Sky
Financial Group, Inc. (the "Company"), a financial services holding company, had
five bank subsidiaries: The Citizens Banking Company ("Citizens"), Mid American
National Bank and Trust Company ("Mid Am Bank"), The Ohio Bank ("Ohio Bank"),
First National Bank Northwest Ohio ("First National"), and Adrian State Bank
("Adrian"); a collection and credit services company, Sky Asset Management
Services, Inc. ("SAMSI"); a securities broker/dealer, Sky Investments, Inc.
("SII"); a data processing company, Sky Technology Resources, Inc. ("Sky Tech");
a commercial finance company, Mid Am Credit Corp. ("MACC"); a consumer finance
company, Mid Am Financial Services, Inc. ("MAFSI"); a mortgage brokerage
company, Simplicity Mortgage Consultants, Inc. ("Simplicity"); a national trust
bank, Mid Am Private Trust, N.A. ("MAPT"); Mid Am Capital Trust I ("MACT");
ValueNet (a wholly-owned subsidiary of Citizens); Freedom Financial Life
Insurance Company; Freedom Express, Inc.; and various other insignificant
subsidiaries. First National and Adrian merged into Mid Am Bank in January of
1999. This review should be read in conjunction with the consolidated financial
statements and other financial data presented elsewhere herein.
 
                                       S-5
<PAGE>   7
 
     The major components of the Company's results of operations and statements
of condition and selected financial ratios for the past five years are
summarized in the following table:
 
              SKY FINANCIAL GROUP, INC. SUMMARY OF FINANCIAL DATA
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------
           Year Ended December 31,
    (Dollars in thousands, except shares,
          per share and ratio data)               1998         1997         1996         1995         1994
<S>                                            <C>          <C>          <C>          <C>          <C>        <C>
- -----------------------------------------------------------------------------------------------------------------
CONSOLIDATED STATEMENT OF INCOME DATA:
Interest income..............................  $  363,680   $  347,531   $  323,050   $  307,848   $  267,901
Interest expense.............................     176,556      166,917      150,936      144,520      110,690
                                               ----------   ----------   ----------   ----------   ----------
Net interest income..........................     187,124      180,614      172,114      163,328      157,211
Provision for credit losses..................      24,968       10,928        7,713        6,472        4,988
                                               ----------   ----------   ----------   ----------   ----------
Net interest income after provision for
  credit losses..............................     162,156      169,686      164,401      156,856      152,223
Other income.................................      97,214       82,167       62,244       46,612       42,735
Other expenses...............................     232,708      164,783      149,131      132,053      131,678
                                               ----------   ----------   ----------   ----------   ----------
Income before income taxes...................      26,662       87,070       77,514       71,415       63,280
Income taxes.................................       8,854       27,750       24,364       22,348       19,329
                                               ----------   ----------   ----------   ----------   ----------
Net income...................................  $   17,808   $   59,320   $   53,150   $   49,067   $   43,951
                                               ==========   ==========   ==========   ==========   ==========
Net income available to common
  shareholders...............................  $   17,808   $   58,715   $   50,743   $   46,316   $   41,034
                                               ==========   ==========   ==========   ==========   ==========
- -----------------------------------------------------------------------------------------------------------------
PER COMMON SHARE DATA: (1)
Basic net income.............................  $     0.39   $     1.29   $     1.14   $     1.03   $     0.92
Diluted net income...........................        0.39         1.27         1.11         1.01         0.91
Cash dividends declared......................        0.65         0.51         0.38         0.23         0.14
Shareholders' equity, period end.............        7.64         8.45         7.77         7.31         6.38
Weighted average shares outstanding basic....  45,124,000   45,402,000   44,510,000   44,876,000   44,825,000
Weighted average shares outstanding
  diluted....................................  45,686,000   46,699,000   47,812,000   48,435,000   48,512,000
- -----------------------------------------------------------------------------------------------------------------
CONSOLIDATED STATEMENT OF CONDITION DATA
  (YEAR END):
Total assets.................................  $4,815,121   $4,562,303   $4,263,034   $4,088,793   $3,849,371
Securities available for sale................     996,426      961,199      901,640      906,031      402,552
Securities held to maturity..................          --       87,207       88,371       74,851      560,790
Loans held for sale..........................      77,471       19,314       23,995       20,318       14,213
Loans, net of unearned income................   3,355,881    3,144,439    2,932,396    2,694,889    2,581,681
Allowance for credit losses..................      54,008       40,376       35,401       33,315       33,690
Deposits.....................................   3,832,662    3,662,941    3,551,726    3,436,990    3,198,225
Total shareholders' equity...................     343,842      387,278      377,195      362,953      326,639
- -----------------------------------------------------------------------------------------------------------------
SELECTED FINANCIAL RATIOS:
Return on average assets.....................        0.38%        1.34%        1.28%        1.24%        1.17%
Return on average common shareholders'
  equity.....................................        4.68        16.04        15.33        15.02        14.51
Dividend pay-out ratio.......................      173.64        42.62        41.35        39.82        36.76
Net interest margin, fully taxable
  equivalent.................................        4.37         4.48         4.55         4.51         4.57
Average loans to average deposits............       87.21        86.48        80.94        79.68        77.73
Average shareholders' equity to average
  assets.....................................        8.08         8.53         8.81         8.75         8.60
Allowance for credit losses to period end
  loans......................................        1.61         1.28         1.21         1.24         1.30
Allowance for loan losses to total non-
  performing loans...........................      431.68       348.25       347.72       225.44       228.44
Non-performing loans to period end loans.....        0.37         0.37         0.35         0.55         0.57
Net charge-offs to average loans.............        0.35         0.19         0.20         0.26         0.17
- -----------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Per share data has been restated to reflect the ten percent stock dividend
    declared and paid in 1998, the two-for-one stock split declared on May 12,
    1998 and the three-for-two stock split declared in 1995 and all acquisitions
    accounted for as poolings of interests (see Note 2 of the financial
    statements.)
 
                                       S-6
<PAGE>   8
 
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                          AND STATISTICAL INFORMATION
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
     The following discussion and analysis represents a review of the Company's
consolidated financial condition, results of operations, liquidity and capital
resources. This review should be read in conjunction with the consolidated
financial statements.
 
RESULTS OF OPERATIONS
 
     Net income in 1998 was $17,808, as compared to net income in 1997 of
$59,320 and $53,150 in 1996. Diluted earnings per common share were $0.39, down
from $1.27 in 1997 and $1.11 in 1996. Reported net income includes after-tax
non-recurring items which reduced net income $47,979, or $1.05 per diluted
share, in 1998, increased net income $1,386, or $0.03 per diluted share, in 1997
and reduced net income $325, or $0.01 per diluted share, in 1996.
 
     Operating earnings, which exclude the after-tax non-recurring items,
increased 13.6% to $65,787 in 1998, versus $57,934 in 1997 and $53,475 in 1996.
Operating earnings per diluted share for 1998 increased 16.1% to $1.44 from
$1.24 in 1997 and $1.12 in 1996. On this same basis, return on average equity
was 17.31% and return on average assets was 1.40% in 1998 compared to 15.66% and
1.31%, respectively, in 1997 and 15.43% and 1.29%, respectively, in 1996.
 
     The 1998 and 1997 operating earnings improvements reflect continued revenue
growth, expense control and strong asset quality, particularly in the community
banks of Sky Financial Group, Inc. The contribution to earnings from the
fee-based financial service affiliates was modest in 1998, as the Company
continued to invest in developing and expanding these businesses to further
diversify and add to future profitability.
 
     For 1998, after-tax non-recurring items included $38,991 merger and
restructuring expenses, $10,400 provision for credit losses to align allowance
accounting methodologies and policies of the merging companies, and a $1,412
gain related to a favorable legal settlement. In 1997, after-tax non-recurring
items included $5,018 gains from the sale of branches, $1,928 merger and
restructuring expenses and $1,690 provision for credit losses. In 1996,
after-tax non-recurring items included a $2,749 SAIF assessment, $545 merger and
restructuring expenses and a $2,969 gain on the sale of a credit card portfolio.
 
BUSINESS LINE RESULTS
 
     Sky Financial Group, Inc. is managed along two major lines of business: the
community banking group and the financial service affiliates. The community
banking group is comprised of Sky Financial Group, Inc.'s three commercial
banks: Mid Am Bank, Citizens and Ohio Bank.
 
     The financial service affiliates include the Company's non-banking
subsidiaries, which operate businesses relating to commercial finance lending
and leasing, broker/dealer operations, non-conforming mortgage lending,
collection activities, wealth management and other financial related services.
 
     Additional information regarding the Company's business lines and the
financial measurement methodologies is provided in Note 20 of the consolidated
financial statements.
 
                                       S-7
<PAGE>   9
 
     The Company's business line results for the three years ended December 31,
1998 are summarized in the table below.
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
                                                                         Net Income (Loss)
                                                                ------------------------------------
                  Year ended December 31,                         1998          1997          1996
<S>                                                             <C>            <C>           <C>
- ----------------------------------------------------------------------------------------------------
Community Banking...........................................    $ 67,209       $57,690       $53,123
Financial Service Affiliates................................         978           409          (351)
Parent and Other............................................     (50,379)        1,221           378
                                                                --------       -------       -------
Consolidated................................................    $ 17,808       $59,320       $53,150
                                                                ========       =======       =======
- ----------------------------------------------------------------------------------------------------
</TABLE>
 
     The increase in community banking net income in 1998 and 1997 was primarily
due to strong revenue growth with significant improvement from mortgage banking
activities in each year. The 1998 community banking results reflect a return on
equity of 18.1% and a return on assets of 1.46%.
 
     The financial service affiliates' earnings reflect the Company's continued
investment in the development and growth of these businesses. While earnings
remain modest, revenues have grown significantly, increasing 45% in 1998 and 68%
in 1997.
 
     Parent and other includes the net funding costs of the parent company and
all significant non-recurring items of income and expense. The 1998 results
reflect the merger and restructuring costs incurred for the mergers completed
during the year. The 1997 results include gains from the sale of branches
partially offset by merger related expenses.
 
NET INTEREST INCOME
 
     Net interest income, the difference between interest income earned on
interest-earning assets and interest expense incurred on interest-bearing
liabilities, is the most significant component of the Company's earnings. Net
interest income is affected by changes in the volumes, rates and composition of
interest-earning assets and interest-bearing liabilities.
 
     The following table, presented on a tax equivalent basis, summarizes net
interest income and net interest margin for each of the three years in the
period ended December 31, 1998.
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
                Year ended December 31,                       1998           1997           1996
<S>                                                         <C>            <C>            <C>      <C>
- ------------------------------------------------------------------------------------------------------
Net interest income.....................................    $187,124       $180,614       $172,114
Taxable equivalent adjustments to net interest income...       5,299          4,814          4,705
                                                            --------       --------       --------
Net interest income, fully-taxable equivalent...........    $192,423       $185,428       $176,819
                                                            ========       ========       ========
Net interest margin.....................................        4.25%          4.36%          4.43   %
Taxable equivalent adjustment...........................         .12            .12            .12
                                                            --------       --------       --------
Net interest margin, fully taxable equivalent...........        4.37%          4.48%          4.55   %
                                                            ========       ========       ========
- ------------------------------------------------------------------------------------------------------
</TABLE>
 
     The increases in net interest income in 1998 and 1997 were due to growth in
average earning assets, primarily loans, more than offsetting declines in the
net interest margin. In 1998, the net interest margin decreased 11 basis points
due to lower yields on earning assets, while funding costs were basically flat,
as increased reliance on higher cost borrowings offset the benefit of lower
deposits costs. In 1997, the net interest margin declined 7 basis points,
primarily due to increased funding costs.
 
                                       S-8
<PAGE>   10
 
AVERAGE BALANCE SHEETS AND RELATED YIELDS AND RATES
 
     The following table reflects the components of the Company's net interest
income for each of the three years ended December 31, 1998, setting forth: (i)
average assets, liabilities, and shareholders' equity, (ii) interest income
earned on interest-earning assets and interest expense incurred on interest-
bearing liabilities, (iii) average yields earned on interest-earning assets and
average rates incurred on interest-bearing liabilities, (iv) the net interest
rate spread (i.e., the average yield earned on interest-earning assets less the
average rate incurred on interest-bearing liabilities), and (v) the net interest
margin (i.e., net interest income divided by average interest-earning assets).
Rates are computed on a tax equivalent basis. Non-accrual loans have been
included in the average balances.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
                                         1998                              1997                                1996
- -----------------------------------------------------------------------------------------------------------------------------------
                                         Interest   Average                Interest   Average                Interest     Average
                             Average     Income/    Yields/    Average     Income/    Yields/    Average     Income/      Yields/
 Year Ended December 31,     Balance     Expense     Rates     Balance     Expense     Rates     Balance     Expense       Rates
<S>                         <C>          <C>        <C>       <C>          <C>        <C>       <C>          <C>        <C>     <C>
- -----------------------------------------------------------------------------------------------------------------------------------
Interest-earning assets
  Interest-earning
    deposits..............  $   13,100   $    654    4.99%    $    5,586   $    292     5.23%   $    4,974   $    284    5.71%
  Federal funds sold and
    other.................      54,767      2,962    5.41         49,133      2,712     5.52        77,802      4,171    5.36
  Securities..............   1,061,244     66,608    6.28      1,002,668     65,862     6.57       996,958     64,575    6.48
  Loans...................   3,269,830    298,755    9.14      3,086,137    283,479     9.19     2,810,238    258,725    9.21
                            ----------   --------             ----------   --------             ----------   --------
  Total interest-earning
    assets................   4,398,941    368,979    8.39      4,143,524    352,345     8.50     3,889,972    327,755    8.43
                                         --------                          --------                          --------
Nonearning assets.........     306,848                           268,451                           247,253
                            ----------                        ----------                        ----------
  Total assets............  $4,705,789                        $4,411,975                        $4,137,225
                            ==========                        ==========                        ==========
Interest-bearing
  liabilities
  Demand deposits.........  $  346,133      5,973    1.73     $  448,969     10,933     2.44    $  468,802      9,847    2.10
  Savings deposits........     955,981     27,803    2.91        813,934     23,705     2.91       812,185     23,914    2.94
  Time deposits...........   2,008,282    112,609    5.61      1,909,610    107,578     5.63     1,841,412    103,527    5.62
                            ----------   --------             ----------   --------             ----------   --------
  Total interest-bearing
    deposits..............   3,310,396    146,385    4.42      3,172,513    142,216     4.48     3,122,399    137,288    4.40
  Short-term borrowings...     206,234      9,566    4.64        211,228     10,460     4.95       147,050      6,768    4.60
  Debt and FHLB
    advances..............     325,267     20,605    6.33        229,219     14,241     6.21       115,988      6,880    5.93
                            ----------   --------             ----------   --------             ----------   --------
  Total interest-bearing
    liabilities...........   3,841,897    176,556    4.60      3,612,960    166,917     4.62     3,385,437    150,936    4.46
                                         --------                          --------                          --------
Non-interest-bearing
  liabilities.............     483,772                           422,617                           387,320
Shareholders' equity......     380,120                           376,398                           364,468
                            ----------                        ----------                        ----------
  Total liabilities and
    equity................  $4,705,789                        $4,411,975                        $4,137,225
                            ==========                        ==========                        ==========
Net interest income, fully
  taxable equivalent;
  Net interest spread.....               $192,423    3.79%                 $185,428     3.88%                $176,819    3.97%
                                         ========    ====                  ========    =====                 ========    ====
Net interest income, fully
  taxable equivalent to
  earning assets..........                           4.37%                              4.48%                            4.55%
                                                     ====                              =====                             ====
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
- - For purposes of this schedule, nonaccrual loans are included in loans.
 
- - Fees collected on loans are included in interest on loans.
 
     Net interest income may also be analyzed by segregating the volume and rate
components of interest income and interest expense. The following table presents
an analysis of increases and decreases in interest income and expense in terms
of changes in volume and interest rates during the three years ended December
31, 1998. Changes not due solely to either a change in volume or a change
 
                                       S-9
<PAGE>   11
 
in rate have been allocated based on the respective percentage changes in
average balances and average rates. The table is presented on a tax equivalent
basis.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
- ---------Year-ended-December-31,-----------------------1998--------------------------1997------------
                                                Change from 1997 in           Change from 1996 in
                                                  interest income               interest income
                                                 or expense due to             or expense due to
                                            ---------------------------   ---------------------------
                                            Volume     Rate      Total    Volume     Rate      Total
<S>                                         <C>       <C>       <C>       <C>       <C>       <C>
- -----------------------------------------------------------------------------------------------------
Interest income attributable to:
  Interest-bearing deposits...............  $   393   $   (31)  $   362   $    35   $   (27)  $     8
  Federal funds sold......................      311       (61)      250    (1,537)       78    (1,459)
  Securities..............................    3,848    (3,102)      746       370       917     1,287
  Loans, net..............................   16,873    (1,597)   15,276    25,401      (647)   24,754
                                            -------   -------   -------   -------   -------   -------
          Total interest income...........   21,425    (4,791)   16,634    24,269       321    24,590
                                            -------   -------   -------   -------   -------   -------
Interest expense attributable to:
  Deposits:
     Interest-bearing demand..............   (2,504)   (2,456)   (4,960)     (417)    1,503     1,086
     Savings..............................    4,137       (39)    4,098        51      (260)     (209)
     Time.................................    5,559      (528)    5,031     3,834       217     4,051
                                            -------   -------   -------   -------   -------   -------
          Total deposits..................    7,192    (3,023)    4,169     3,468     1,460     4,928
Short-term borrowings.....................     (247)     (647)     (894)    2,954       738     3,692
Debt and FHLB advances....................    5,967       397     6,364     6,716       645     7,361
                                            -------   -------   -------   -------   -------   -------
          Total interest expense..........   12,912    (3,273)    9,639    13,138     2,843    15,981
                                            -------   -------   -------   -------   -------   -------
Net interest income.......................  $ 8,513   $(1,518)  $ 6,995   $11,131   $(2,522)  $ 8,609
                                            =======   =======   =======   =======   =======   =======
- -----------------------------------------------------------------------------------------------------
</TABLE>
 
PROVISION FOR CREDIT LOSSES
 
     The provision for credit losses represents the charge to income necessary
to adjust the allowance for loan losses to an amount that represents
management's assessment of the losses inherent in the Company's loan portfolio.
All lending activity contains associated risks of loan losses, and the Company
recognizes these credit risks as a necessary element of its business activity.
To assist in identifying and managing potential loan losses, the Company
maintains a loan review function that continuously evaluates individual credit
relationships as well as overall loan-portfolio conditions. One of the primary
objectives of this loan review function is to make recommendations to management
as to both specific loss reserves and overall portfolio-loss reserves.
 
     Provision for credit losses expense for both 1998 and 1997 included
non-recurring provisions for aligning the allowance for loan loss accounting and
methodologies of the merging companies. In 1998, the provision for credit losses
of $24,968 included a $16,000 additional provision for mergers, while in 1997,
the provision for credit losses of $10,928 included a $2,600 additional
provision. The provision for credit losses for 1996 was $7,713. The increased
provision in 1998 resulted from a number of factors, including the alignment in
methodologies of the merged entities to reflect one uniform approach to
analyzing the allowance for credit losses. These actions resulted in adjustments
to the risk factors used in determining allocations for categories of loans to
reflect the risk inherent in the combined portfolio. Due to the combination of
14 banking and multiple other entities during the five-year period ended
December 31, 1998, the Company utilized peer and industry data compared to its
historical loss data when establishing and evaluating the allowance. Other
factors considered in determining the 1998 provision included $211,442 growth in
total loans during the year, a shift in the composition of the portfolio to
include a greater percentage of non-residential mortgage loans (27.6% of total
loans at year end 1998, compared to 24.9% at year-end 1997 and 21.8% at the
beginning of 1997), the impact of the downturn in the agribusiness industry, and
nonperforming loan levels, which remained constant after
                                      S-10
<PAGE>   12
 
1998 charge-offs greater than historical levels. The Company's allowance for
credit losses as a percentage of loans at December 31, 1998 was 1.61% as
compared to 1.28% and 1.21% at December 31, 1997 and 1996. At December 31, 1998,
the Company's allowance for credit losses represented 432% of nonperforming
loans as compared to 348% at both December 31, 1997 and 1996.
 
NON-INTEREST INCOME
 
     The table below summarizes the sources of the Company's non-interest
income.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                                                        1998    1997
                                                                                        Vs.     Vs.
              Year ended December 31,                   1998       1997       1996      1997    1996
<S>                                                    <C>        <C>        <C>        <C>     <C>  <C>
- --------------------------------------------------------------------------------------------------------
Trust department income............................    $ 5,434    $ 4,269    $ 3,291     27%     30%
Service charges and fees on deposit accounts.......     15,248     14,691     12,509      4      17
Mortgage banking income............................     24,501     15,525     12,093     58      28
Brokerage commissions..............................      9,430      6,083      9,156     55     (34)
Collection agency fees.............................      4,115      5,053      4,213    (19)     20
Net gains (losses) on sales of securities..........      1,194       (118)     1,553     --      --
Net gains on sales of commercial financing loans...     19,378     13,027      2,992     49     335
Gain on sale of credit card accounts...............         --         --      4,568     --      --
Gain on sale of deposits and branch offices........         --      8,703         --     --      --
International department fees......................        965        978      1,011     (1)     (3)
Net gains on sales of other loans..................        732        976        395    (25)    147
Other..............................................     16,217     12,980     10,463     25      24
                                                       -------    -------    -------
                                                       $97,214    $82,167    $62,244     18%     32%
                                                       =======    =======    =======
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
     Non-interest revenue grew $15,047, to $97,214 in 1998, increasing 18.3%
compared with $82,167 in 1997, which increased $19,923, or 32%, from $62,244 in
1996. Excluding non-recurring gains of $1,475 in 1998 for a favorable legal
settlement , $7,992 for net gains related to the sale of branches in 1997 and
$4,568 in 1996 for a gain on the sale of credit card accounts, non-interest
revenues increased 29% in both 1998 and 1997. The substantial increase reflects
the emphasis of the Company on expanding its fee-based businesses, diversifying
its revenue sources and adding to profitability beyond traditional banking
products and services.
 
     Mortgage banking, which includes both conventional and non-conforming loan
products, remains the largest component of non-interest income and consists of
net gains on the sales of mortgage loans and mortgage loan servicing fees.
Mortgage banking revenues grew $8,976, or 58% in 1998 and $3,432, or 28% in
1997, the increases were mainly due to higher volumes of mortgage loans sold.
 
     Gains on the sale of commercial financing loans, for medical and dental
businesses, increased $6,351, or 49% in 1998 and $10,035, or 335% in 1997. This
business was initiated in 1996 and the rise in revenues was primarily
attributable to increasing volumes of loans sold and to higher profit margins.
 
     Brokerage commissions on investment and insurance products increased
$3,347, or 55%, in 1998 after decreasing $3,073, or 34% in 1997. The revenue
increase in 1998 was the result of increased volumes created by adding new
independent registered representatives (brokers). The number of registered
representatives decreased in mid-year 1996 after a change in the clearinghouse
used by the Company's broker-dealer subsidiary which lead to the decline in
revenues in 1997.
 
     Trust fees on traditional and new wealth management products grew $1,165,
or 27% in 1998, and $633, or 30% in 1997. The increase was primarily due to
revenues generated through the formation of Mid Am Private Trust in January of
1997.
 
                                      S-11
<PAGE>   13
 
     Other income increased $3,237 in 1998 and $2,517 in 1997. Contributing to
these increases was the increase in cash surrender values of bank owned life
insurance policies which were purchased beginning in 1997.
 
NON-INTEREST EXPENSE
 
     Non-interest expense includes costs, other than interest, that are incurred
in the operations of the Company. The table below summarizes the components of
the Company's non-interest expense.
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
                                                                                     1998   1997
                                                                                     Vs.    Vs.
             Year ended December 31,                  1998       1997       1996     1997   1996
<S>                                                 <C>        <C>        <C>        <C>    <C>  <C>
- ----------------------------------------------------------------------------------------------------
Salaries and employee benefits....................  $ 93,639   $ 86,461   $ 71,228     8%    21%
Occupancy and equipment expense...................    26,056     24,245     22,264     7      9
Merger, integration and restructuring expense.....    54,487      1,603        838    --     91
Brokerage commissions.............................     6,209      3,597      5,604    73    (36)
FDIC expense......................................       706        714      5,573    (1)   (87)
Franchise taxes...................................     4,717      4,547      4,426     4      3
Printing and supplies.............................     3,844      3,853      3,952    --     (3)
Legal and other professional fees.................     7,294      5,767      3,908    26     48
Telephone.........................................     4,912      4,367      4,242    12      3
Amortization of intangible assets.................     2,743      2,957      2,442    (7)    21
Other.............................................    28,101     26,672     24,654     5      8
                                                    --------   --------   --------
                                                    $232,708   $164,783   $149,131    41%    10%
                                                    ========   ========   ========
- ----------------------------------------------------------------------------------------------------
</TABLE>
 
     Non-interest expense in 1998 was $232,708 compared with $164,783 in 1997
and $149,131 in 1996. Merger and restructuring charges were $54,487 in 1998 and
$1,603 in 1997 and $838 in 1996. Non-recurring expenses also included $1,415 in
1997, mainly employee related expenses resulting from the sale of branches, and
$4,230 in 1996, for the special assessment on deposits insured through SAIF.
Excluding the merger and restructuring charges, and other non-recurring expenses
and non-interest expense was $178,221 in 1998, an increase of $16,456, or 10%,
from 1997, which increased $17,702, or 12%, from 1996.
 
     Salaries and employee benefits increased $7,178, or 8%, in 1998 and
$15,233, or 21%, in 1997. The increases were primarily attributable to increases
in salary rates, staffing in the financial service affiliates, commissions based
on mortgage loan originations and fee-based products, and incentives and
benefits based on the operating performance of the Company.
 
     Net occupancy and equipment expense increased $1,811, or 7%, in 1998 and
$1,981, or 9%, in 1997, mainly to support the expansion of the Company's
financial service affiliates.
 
     In 1998, the merger and restructuring expenses of $54,487 included costs to
complete the merger transactions, convert and integrate systems and processes,
redesign the workforce, and reorganize the Company. The major portion of this
effort was completed during the fourth quarter of 1998 with the benefits of
reduced expenses to be realized with the beginning of 1999. Further discussion
of the mergers and the related restructuring expenses is included in Notes 2 and
13 of the consolidated financial statements.
 
INCOME TAXES
 
     The provision for income taxes decreased to $8,854 in 1998 from $27,750 in
1997 due to a decrease in pre-tax income. The effective income tax rates for
1998, 1997 and 1996 were 33.2%, 31.9% and 31.4%. The increase in the effective
tax rate in 1998 resulted from non-tax deductible merger and restructuring costs
incurred in the year. The Company became subject to state income taxes in 1997
because of expansion of its fee-based financial services businesses into new
states.
 
                                      S-12
<PAGE>   14
 
LOAN PORTFOLIO
 
     The amount of loans outstanding and the percent of the total represented by
each type on the dates indicated were as follows.
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
          December 31,               1998         1997         1996         1995         1994
<S>                               <C>          <C>          <C>          <C>          <C>          <C>
- ------------------------------------------------------------------------------------------------------
Real estate loans
  Construction..................  $  149,795   $  140,656   $  123,634   $  108,636   $  102,738
  Residential mortgage..........   1,054,290    1,047,112    1,038,177    1,060,767    1,083,420
  Non-residential mortgage......     926,191      782,930      638,950      491,287      442,378
Commercial, financial and
  agricultural loans............     808,004      754,392      761,350      680,052      605,257
Installment and credit card
  loans.........................     409,748      410,170      362,583      345,841      337,467
Other loans.....................       7,853        9,179        7,702        8,306       10,421
                                  ----------   ----------   ----------   ----------   ----------
          Total Loans...........  $3,355,881   $3,144,439   $2,932,396   $2,694,889   $2,581,681
                                  ==========   ==========   ==========   ==========   ==========
- ------------------------------------------------------------------------------------------------------
Real estate loans
  Construction..................         4.5%         4.5%         4.2%         4.0%         4.0%
  Residential mortgage..........        31.4         33.3         35.4         39.4         42.0
  Non-residential mortgage......        27.6         24.9         21.8         18.2         17.1
Commercial, financial and
  agricultural loans............        24.1         24.0         26.0         25.2         23.4
Installment and credit card
  loans.........................        12.2         13.0         12.4         12.8         13.1
Other loans.....................         0.2          0.3          0.3          0.3          0.4
                                  ----------   ----------   ----------   ----------   ----------
          Total Loans...........       100.0%       100.0%       100.0%       100.0%       100.0%
                                  ==========   ==========   ==========   ==========   ==========
- ------------------------------------------------------------------------------------------------------
</TABLE>
 
     Real estate loans, including construction and mortgage loans, approximated
63% of total loans at December 31, 1998. Collateral evaluations and the
historical data of the Company's mortgage loan losses are used to determine the
amount necessary for the allowance for credit losses. The Company's general
collateral policy for residential real estate mortgages is to follow FNMA and
FHLMC guidelines, which generally require a loan-to-value ratio of 80% or
private mortgage insurance for loan-to-value ratios in excess of 80%.
 
     A significant portion (24%) of the loan portfolio is composed of commercial
loans. Personal and business financial status, credit standing, and available
collateral of commercial borrowers, plus management's judgment as to prevailing
and anticipated economic conditions and the historical data of the Company's
commercial loan losses, are taken into consideration when determining the amount
of the allowance for credit losses needed for commercial loans. The amount of
collateral required on commercial loans is generally determined based on a
loan-by-loan assessment. Average loan-to-value ratios for commercial loans
typically range from 50% to 80%. Factors which are considered include, among
other things, the purpose of the loan, the current financial status of the
borrower and the borrower's prior credit history.
 
     The remaining portion (13%) of the Company's loan portfolio are
installment, credit card loans and other loans and leases. A thorough credit
examination is done at the time of the extension of credit. The Company sold
substantially all of its credit card loans in the fourth quarter of 1996. The
Company makes consumer loans on both a secured and unsecured basis depending, in
part, on the nature, purpose and term of the loan. Loan-to-value ratios for
secured consumer loans range from 70% to 90% as a general rule. The historical
data of the Company's consumer loan losses and the Company's credit evaluations
are used to determine the necessary amount for its allowance for credit losses.
 
                                      S-13
<PAGE>   15
 
     The following table shows the amount of commercial, financial and
agricultural loans and real estate construction loans outstanding as of December
31, 1998 which, based on remaining scheduled repayments of principal, are due in
the periods indicated. Also, the amounts due after one year are classified
according to their sensitivity to changes in interest rates.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
                                                      Due In       Due In      Due After
                 December 31, 1998                    1 Year    1 Yr - 5 Yrs    5 Years     Total
- ---------------------------------------------------------------------------------------------------
<S>                                                  <C>        <C>            <C>         <C>
Commercial, financial and agricultural.............  $207,019     $306,235     $294,750    $808,004
Construction.......................................    76,422       28,660       44,713     149,795
                                                     --------     --------     --------    --------
          Total....................................  $283,441     $334,895     $339,463    $957,799
                                                     ========     ========     ========    ========
Total due after one year
Fixed rate commercial, financial, agricultural and
  construction.....................................               $ 90,078     $ 53,159    $143,237
Variable rate commercial, financial, agricultural
  and construction.................................                244,817      286,304     531,121
                                                                  --------     --------    --------
          Total....................................               $334,895     $339,463    $674,358
                                                                  ========     ========    ========
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
     Actual maturities of loans will differ from the contractual maturities
presented in the table above because of prepayments, rollovers and renegotiation
of payment terms, among other factors.
 
     The following table presents the aggregate amounts of non-performing assets
and respective ratios on the dates indicated.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
                  December 31,                     1998      1997      1996      1995      1994
- -----------------------------------------------------------------------------------------------------
<S>                                               <C>       <C>       <C>       <C>       <C>     <C>
Nonaccrual loans................................  $10,619   $11,119   $ 9,690   $13,874   $14,419
Restructured loans..............................    1,892       475       491       904       329
                                                  -------   -------   -------   -------   -------
Total nonperforming loans.......................   12,511    11,594    10,181    14,778    14,748
Other real estate owned.........................    1,330       767     3,053     2,850     3,384
                                                  -------   -------   -------   -------   -------
Total nonperforming assets......................  $13,841   $12,361   $13,234   $17,628   $18,132
                                                  =======   =======   =======   =======   =======
Loans 90 days or more past due and not on
  nonaccrual....................................  $ 4,061   $ 4,822   $ 7,395   $ 2,339   $ 4,766
                                                  =======   =======   =======   =======   =======
Nonperforming loans to total loans..............     0.37%     0.37%     0.35%     0.55%     0.57%
Nonperforming assets to total loans plus other
  real estate owned.............................     0.41      0.39      0.44      0.65      0.69
Allowance for credit losses to total
  nonperforming loans...........................   431.68    348.25    347.72    225.44    228.44
Loans 90 days or more past due and not on
  nonaccrual to total loans.....................     0.12      0.15      0.25      0.09      0.18
- -----------------------------------------------------------------------------------------------------
</TABLE>
 
     SFAS 114 "Accounting by Creditors for Impairment of a Loan," and SFAS 118
"Accounting by Creditors for Impairment of a Loan-Income Recognition and
Disclosures," were adopted effective January 1, 1995. Residential mortgage,
installment and other consumer loans are collectively evaluated for impairment.
Individual commercial loans exceeding size thresholds established by management
are evaluated for impairment. Impaired loans are recorded at the loan's fair
value by the establishment of a specific allowance where necessary. The fair
value of the underlying collateral-dependent loans is determined by the fair
value of the underlying collateral. The fair value of noncollateral-dependent
loans is determined by discounting expected future interest and principal
payments at the loan's effective interest rate. All impaired loans, as defined
by SFAS 114, are included in the non-performing loans.
 
                                      S-14
<PAGE>   16
 
     Nonaccrual loans are comprised principally of loans 90 days past due, as
well as certain loans which are current but where serious doubts exist as to the
ability of the borrower to comply with the repayment terms. Interest previously
accrued and not yet paid on nonaccrual loans is reversed or charged against the
allowance for credit losses during the period in which the loan is placed in a
nonaccrual status, except where the Company has determined that such loans are
adequately secured as to principal and interest. Interest earned thereafter is
included in income only to the extent that it is received in cash. In certain
cases, interest received may be credited against principal outstanding under the
cost recovery method.
 
     The Ohio Bank and Mid Am Bank have outstanding lease receivables and loans
with an aggregate outstanding balance at December 31, 1998 of $1,643 to The
Bennett Funding Group, Inc. and related entities (Bennett) which remain subject
to the Bennett bankruptcy proceeding commenced in March 1998. In December 1997
and January 1998, the bankruptcy judge ruled that The Ohio Bank and Mid Am Bank,
respectively, were secured creditors with respect to certain of their
outstanding Bennett portfolios. These decisions have been appealed by the
bankruptcy trustee and the appeals are pending. No decision has been rendered
with respect to $1,643 in loans from The Ohio Bank and Mid Am which present
different issues from the issues rendered by the bankruptcy judge. The Bennett
loans are included in non-accrual loans.
 
     Loans now current but where some concerns exist as to the ability of the
borrower to comply with present loan repayment terms, excluding non-performing
loans, approximated $23,168 and $30,353 at December 31, 1998 and 1997,
respectively, and are being closely monitored by management and the Boards of
Directors of the subsidiaries. The classification of these loans, however, does
not imply that management expects losses on each of these loans, but believes
that a higher level of scrutiny is prudent under the circumstances. The decrease
in loans where some concern exists is primarily attributable to the Company's
continuous process of loan review, which has identified various improvements in
the financial condition of certain of the individual borrowers. In the opinion
of management, these loans require close monitoring despite the fact that they
are performing according to their terms. Such classifications relate to specific
concerns relating to each individual borrower and do not relate to any
concentrated risk elements common to all loans in this group.
 
     Other real estate owned amounted to $1,330 and $767 at December 31, 1998
and 1997, respectively.
 
     As of December 31, 1998, the Company did not have any loan concentrations
which exceeded 10% of total loans.
 
                                      S-15
<PAGE>   17
 
SUMMARY OF CREDIT LOSS EXPERIENCE
 
     The following table presents a summary of credit loss experience for the
periods indicated.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------
             December 31,                  1998         1997         1996         1995         1994
<S>                                      <C>           <C>          <C>          <C>          <C>     <C>
- ---------------------------------------------------------------------------------------------------------
Balance at beginning of the period.....  $ 40,376      $35,401      $33,315      $33,690      $32,947
Loans charged-off:
Real estate............................    (3,466)        (842)      (1,410)        (770)        (815)
Commercial and agricultural loans......    (6,782)      (3,949)      (2,944)      (5,816)      (3,990)
Installment and credit card............    (4,955)      (3,853)      (4,754)      (3,403)      (2,638)
Other loans............................        (5)         (68)         (14)                      (14)
                                         --------      -------      -------      -------      -------
Total charge-offs......................   (15,208)      (8,712)      (9,121)      (9,989)      (7,457)
                                         --------      -------      -------      -------      -------
Recoveries:
Real estate............................       335          296          384          526          229
Commercial and agricultural loans......     2,191        1,306        1,863        1,595        1,934
Installment and credit card............     1,313        1,111        1,191          985        1,049
Other loans............................        33           46           57           36
                                         --------      -------      -------      -------      -------
Total recoveries.......................     3,872        2,759        3,495        3,142        3,212
                                         --------      -------      -------      -------      -------
Net loans charged-off..................   (11,336)      (5,953)      (5,627)      (6,847)      (4,245)
Provision charged to operating
  expense..............................    24,968       10,928        7,713        6,472        4,988
                                         --------      -------      -------      -------      -------
Balance at the end of the period.......  $ 54,008      $40,376      $35,401      $33,315      $33,690
                                         ========      =======      =======      =======      =======
Ratio of net charge-offs to average
  loans outstanding....................      0.35%        0.19%        0.70%        0.26%        0.17%
Allowance for credit losses to total
  loans................................      1.61         1.28         1.21         1.24         1.30
Allowance for loan losses to total non-
  performing loans.....................    431.68       348.25       347.72       225.44       228.44
- ---------------------------------------------------------------------------------------------------------
</TABLE>
 
     The provision for credit losses reflects the amount necessary in
management's opinion to maintain an adequate reserve, based upon its analysis of
the loan portfolio (including the loan growth rate and change in the mix of the
loan portfolio) and general economic conditions and the necessity to state
certain individual loans at their estimated fair value.
 
     The Company's banking subsidiaries monitor the adequacy of their allowances
for credit losses on a monthly basis. The banking subsidiaries formally document
their evaluations of the adequacy of their allowances for credit losses on a
quarterly basis and the evaluations are reviewed and discussed with each bank's
respective Board of Directors. The Company's Asset Quality Department presents a
quarterly consolidated evaluation of the adequacy of the allowance for credit
losses to the Company's Board of Directors. These evaluations of potential
losses include, without limitation, a review of the current financial status and
credit standing of commercial borrowers and their prior history, an evaluation
of available collateral, a review of loss experience in relation to outstanding
loans, and management's judgment as to prevailing and anticipated economic
conditions. Such factors include, among others, changes in the credit grade
assigned to the loan by either the assigned officer or by the Company's Asset
Quality Department from its periodic reviews of segments of the loan portfolios,
and increases or decreases in specific reserves assigned to individual loans.
Residential mortgage and consumer portfolios are collectively evaluated giving
consideration to the trend of delinquencies and charge-offs and current and
anticipated economic conditions.
 
                                      S-16
<PAGE>   18
 
     The following table sets forth the allocation of the allowance for credit
losses for the periods indicated.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------
             December 31,                  1998          1997          1996          1995          1994
<S>                                       <C>           <C>           <C>           <C>           <C>
- ---------------------------------------------------------------------------------------------------------
Construction..........................    $   693       $    93       $    77       $    53       $    37
Real estate...........................      6,504         2,110         2,294         1,824         3,800
Commercial, financial and
  agricultural........................     20,647        13,028        10,301        10,892        12,489
Installment and credit card...........      9,130         4,716         4,016         3,378         3,580
Other loans...........................      1,820           355         1,106           474           422
Unallocated...........................     15,214        20,074        17,607        16,694        13,362
                                          -------       -------       -------       -------       -------
Total.................................    $54,008       $40,376       $35,401       $33,315       $33,690
                                          =======       =======       =======       =======       =======
- ---------------------------------------------------------------------------------------------------------
</TABLE>
 
SECURITIES
 
     The following tables set forth the fair value of securities available for
sale at the respective year end for each of the last three years and the
aggregate amortized cost of the Company's securities held to maturity at
December 31, 1997 and 1996.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
                                                                   Estimated Fair Value
                                                              ------------------------------
                        December 31,                            1998       1997       1996
- --------------------------------------------------------------------------------------------
<S>                                                           <C>        <C>        <C>
SECURITIES AVAILABLE FOR SALE
U.S. Treasury securities and obligations of U.S. Government
  agencies and corporations.................................  $244,646   $304,620   $256,897
Obligations of states and political subdivisions............   110,239     81,319     83,272
Corporate and other securities..............................    14,911     28,090     16,436
Mortgage-backed securities..................................   537,473    486,087    494,432
                                                              --------   --------   --------
Total debt securities available for sale....................   907,269    900,116    851,037
Marketable equity securities................................    89,157     61,083     50,603
                                                              --------   --------   --------
Total securities available for sale.........................  $996,426   $961,199   $901,640
                                                              ========   ========   ========
- --------------------------------------------------------------------------------------------
</TABLE>
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
                                                                      Amortized Cost
                                                              ------------------------------
                        December 31,                            1998       1997       1996
- --------------------------------------------------------------------------------------------
<S>                                                           <C>        <C>        <C>
SECURITIES HELD TO MATURITY
U.S. Treasury securities and obligations of U.S. Government
  agencies and corporations.................................  $     --   $ 61,599   $ 60,798
Obligations of states and political subdivisions............               22,013     23,623
Corporate and other securities..............................                1,496      1,498
Mortgage-backed securities..................................                2,099      2,452
                                                              --------   --------   --------
Total securities held to maturity...........................  $     --   $ 87,207   $ 88,371
                                                              ========   ========   ========
- --------------------------------------------------------------------------------------------
</TABLE>
 
     The portfolio contains mortgage-backed securities and to a limited extent,
other securities, which have unknown cash flow characteristics. The variable
cash flows present additional risk to the bondholders in the form of prepayment
or extension risk primarily caused by market interest rate changes. This
additional risk is generally rewarded in the form of higher yields to the
investor.
 
     The Company utilizes tools to minimize and monitor this risk, requiring the
security to pass a stress test at the time of purchase. This testing measures
prepayment and extension risk under severe changes in interest rates.
Additionally, the corporate investment policy defines certain types of high risk
securities as ineligible for purchase, including securities which may not return
full principal to the Company. It is also the practice of the Company to
minimize premiums paid on mortgage securities to
                                      S-17
<PAGE>   19
 
avoid yield reduction if prepayments increase. These policies help insure that
there will be no material impact from these investments to the financial
statements due to changing interest rates.
 
     The internal accounting systems and controls are in place to account for
amortization and accretion of premiums and discounts. As prepayments of
principal are received, the system automatically adjusts premiums and discounts
to reflect the proper book values.
 
     There are no securities of any single issuer where the aggregate carrying
value of such securities exceeded 10% of shareholders' equity, except those of
the U.S. Treasury, U.S. Government agencies and substantially all
mortgage-backed securities issued by Federal Home Loan Mortgage Corporation
("FHLMC"), Federal National Mortgage Association ("FNMA") and Government
National Mortgage Association.
 
     The following tables show the contractual maturities and weighted average
yields of the Company's securities as of December 31, 1998. Expected maturities
will differ from contractual maturities because issuers may have the right to
call or prepay obligations with or without call or prepayment penalties.
Mortgage-backed securities are presented in the table based on current
assumptions as to prepayments. The weighted average yields on income from tax
exempt obligations of state and political subdivisions have been adjusted to a
tax equivalent basis.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
                                                    Within 1 Yr         1 - 5 Yrs          5 - 10 Yrs        Over 10 Yrs
                                                  ----------------   ----------------   ----------------   ----------------
               December 31, 1998                   Amount    Yield    Amount    Yield    Amount    Yield    Amount    Yield
- ---------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>        <C>     <C>        <C>     <C>        <C>     <C>        <C>
AVAILABLE FOR SALE
U.S. Treasury and U.S. Government agencies and
  corporations..................................  $ 79,398   6.50%   $150,937   6.32%   $  9,478   7.67%   $  4,835   6.56%
Obligations of states and political
  subdivisions..................................    13,582   6.93      51,817   6.85      29,086   6.90      15,752   7.22
Corporate and other securities..................     3,037   6.83       8,624   5.96         933   5.70       2,317   1.32
Mortgage-backed securities......................    10,839   6.44      30,784   6.08     132,521   7.02     363,329   6.90
                                                  --------           --------           --------           --------
Total debt securities available for sale........  $106,856   6.55%   $242,162   6.39%   $172,018   7.03%   $386,233   6.88%
                                                  ========           ========           ========           ========
- ---------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
DEPOSITS
 
     The following is a schedule of average deposit amounts and average rates
paid on each category for the period indicated (in thousands of dollars):
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
                                             Average Amounts Outstanding         Average Rate Paid
                                         ------------------------------------   -------------------
        Year ended December 31,             1998         1997         1996      1998   1997   1996
- ---------------------------------------------------------------------------------------------------
<S>                                      <C>          <C>          <C>          <C>    <C>    <C>
Non-interest-bearing demand deposits...  $  438,884   $  395,961   $  349,774
Interest-bearing demand deposits.......     346,133      448,969      468,802   1.73%  2.44%  2.10%
Savings deposits.......................     955,981      813,934      812,185   2.91   2.91   2.94
Time deposits..........................   2,008,282    1,909,610    1,841,412   5.61   5.63   5.62
                                         ----------   ----------   ----------
Total..................................  $3,749,280   $3,568,474   $3,472,173
                                         ==========   ==========   ==========
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
     The following is a schedule of maturities of time deposits in amounts of
$100,000 or more as of December 31, 1998:
 
<TABLE>
<S>                                                           <C>
- ----------------------------------------------------------------------
December 31, 1998
- ----------------------------------------------------------------------
Three months or less........................................  $165,925
Three through six months....................................   105,679
Six through twelve months...................................    87,346
Over twelve months..........................................    99,977
                                                              --------
Total.......................................................  $458,927
                                                              ========
- ----------------------------------------------------------------------
</TABLE>
 
                                      S-18
<PAGE>   20
 
SHORT-TERM BORROWINGS
 
     The following table sets forth certain information relative to the
securities sold under agreements to repurchase and Federal funds purchased.
Generally, repurchase agreements are sold to local government entities and
businesses and have maturity terms of overnight to 30 days. Federal funds
purchased generally have overnight terms.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------
                    December 31,                         1998        1997        1996
- ---------------------------------------------------------------------------------------
<S>                                                    <C>         <C>         <C>      <C>
Total securities sold under agreement to repurchase
  and
  Federal funds purchased at period-end..............  $207,458    $182,362    $186,782
Weighted average interest rate at period-end.........      4.43%       4.95%       5.19 %
Maximum outstanding at any month-end during the
  year...............................................  $231,453    $268,320    $210,294
Average amount outstanding...........................   206,234     211,228     147,050
Weighted average rates during the year...............      4.64%       4.95%       4.60 %
- ---------------------------------------------------------------------------------------
</TABLE>
 
CAPITAL RESOURCES
 
     The Federal Reserve Board ("FRB") has established risk-based capital
guidelines that must be observed by bank holding companies and banks. Under
these guidelines, total qualifying capital is categorized into two
components -- Tier I and Tier II capital. Tier I capital generally consists of
common shareholders' equity, perpetual preferred stock (subject to limitations)
and minority interests in subsidiaries. Subject to limitations, Tier II capital
includes certain other preferred stock and debentures, and a portion of the
reserve for credit losses. These ratios are expressed as a percentage of risk-
adjusted assets, which include various risk-weighted percentages of
off-balance-sheet exposures, as well as assets on the balance sheet. The FRB
regulations governing the various capital ratios do not recognize the effects of
SFAS 115 "Accounting for Certain Investments in Debt and Equity Securities" on
capital relating to changes in market value of securities available for sale.
 
     At December 31, 1998, a minimum Tier I capital ratio of 4.00% and a total
capital ratio of 8.00% were required. The Company's qualifying capital at
December 31, 1998 exceeded both the Tier I and Tier II risk-based capital
guidelines. In addition, a capital leverage ratio is used in connection with the
risk-based capital standards which is defined as Tier I capital divided by total
assets adjusted for certain items. Included in Tier I capital are $23,600 of
10.20% capital securities issued by the Company through a special purpose trust
subsidiary in 1997. The following table presents the various capital and
leverage ratios of the Company.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------
                        December 31,                             1998          1997
- --------------------------------------------------------------------------------------
<S>                                                           <C>           <C>        <C>
Total adjusted average assets for leverage ratio............  $4,798,176    $4,441,325
Risk-weighted assets and off-balance-sheet financial
  instruments for capital ratio.............................   3,893,627     3,442,250
Tier I capital..............................................     345,122       389,190
Total risk-based capital....................................     450,025       428,320
Leverage ratio..............................................         7.2%          8.8 %
Tier I capital ratio........................................         8.9          11.3
Total capital ratio.........................................        11.6          12.4
- --------------------------------------------------------------------------------------
</TABLE>
 
                                      S-19
<PAGE>   21
 
     Capital ratios applicable to the Company's main banking subsidiaries at
December 31, 1998 were as follows:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------
                                                                                     Total
                                                                         Tier I    Risk-based
                     December 31, 1998                        Leverage   Capital    Capital
- ---------------------------------------------------------------------------------------------
<S>                                                           <C>        <C>       <C>
Regulatory capital requirements:
  Minimum...................................................    4.0%       4.0%        8.0%
  Well-capitalized..........................................    5.0        6.0        10.0
Bank Subsidiaries at period end:
  Mid Am Bank...............................................    6.9        7.8        10.2
  Citizens..................................................    5.5        8.4        10.5
  Ohio Bank.................................................    6.0        8.2        10.5
  First National............................................    6.0        7.5        10.2
- ---------------------------------------------------------------------------------------------
</TABLE>
 
LIQUIDITY
 
     The liquidity of a financial institution reflects its ability to provide
funds to meet loan requests, to accommodate possible outflows in deposits and to
take advantage of interest rate market opportunities. Funding of loan requests,
providing for liability outflows, and management of interest rate fluctuations
require continuous analysis in order to match the maturities of specific
categories of short-term loans and investments with specific types of deposits
and borrowings. Financial institution liquidity is thus normally considered in
terms of the nature and mix of the institution's sources and uses of funds.
 
     The Company's banking subsidiaries maintain adequate liquidity primarily
through the use of investment securities and unused borrowing capacity, in
addition to maintaining a stable core deposit base. At December 31, 1998,
securities and other short-term investments with maturities of one year or less
totaled $132,880, with additional liquidity provided by the remainder of the
investment portfolio. The banks utilize several short-term and long-term
borrowing sources. Each of the banking subsidiaries is a member of the Federal
Home Loan Bank (FHLB) and have lines of credit with the FHLB. At December 31,
1998, these lines of credit enable the banks to borrow up to $482,440, of which
$244,297 is currently outstanding.
 
     Since the Company is a holding company and does not conduct operations, its
primary sources of liquidity are borrowings from outside sources and dividends
paid to it by its subsidiaries. For the banking subsidiaries, regulatory
approval is required in order to pay dividends in excess of the subsidiaries'
earnings retained for the current year plus retained net profits for the prior
two years. As a result of these restrictions, dividends which could be paid to
the Company by its bank subsidiaries were limited to $15,586 at December 31,
1998.
 
     In December, 1996, the Company entered into an agreement with an unrelated
financial institution which enabled the Company to borrow up to $20,000 for a
period of one year. The agreement was renewed in December, 1997 and permitted
the Company to borrow up to $25,000 through December 30, 1998. In December 1998,
the agreement was renewed allowing the Company to borrow up to $30,000 through
November 30, 1999, and at December 31, 1998, the full line was utilized. The
Company is currently in the process of renegotiating the agreement to increase
the line of credit to $75,000.
 
     On January 16, 1998, the Company issued $50,000 of 7.08% subordinated
ten-year debt in a private placement transaction. The proceeds from this debt
were used for general corporate purposes, investment securities and the buyback
of the Company's common stock under a systematic plan for funding future stock
dividends and issuance of shares under its stock option plan. The subordinated
debt is considered Tier II capital for regulatory purposes.
 
                                      S-20
<PAGE>   22
 
     During the second quarter of 1997, the Company issued, through a special
purpose subsidiary, $27,500 of 10.20% Trust Preferred Securities. The mandatory
redemption date of the securities is June 1, 2027. However, the Company may
redeem the securities commencing June 1, 2007 at a redemption price of 105.10%
of the face value of the capital securities and thereafter at a premium which
declines annually. In 1998, the Company retired securities with a face value of
$2,900, and at December 31, 1998, securities outstanding totaled $23,600. On or
after June 1, 2017, the remaining capital securities may be redeemed at face
value. The capital securities are reflected as long-term debt in the Company's
financial statements; however, for regulatory purposes the capital securities
are considered Tier I capital.
 
ASSET/LIABILITY MANAGEMENT
 
     Closely related to liquidity management is the management of
interest-earning assets and interest-bearing liabilities. The Company manages
its rate sensitivity position to avoid wide swings in net interest margins and
to minimize risk due to changes in interest rates.
 
     The difference between a financial institution's interest rate sensitive
assets (i.e., assets which will mature or reprice within a specific time period)
and interest rate sensitive liabilities (i.e., liabilities which will mature or
reprice within the same time period) is commonly referred to as its "interest
rate sensitivity gap" or "gap." An institution having more interest rate
sensitive assets than interest rate sensitive liabilities within a given time
period is said to have a "positive gap," which generally means that if interest
rates increase, a company's net interest income will increase and if interest
rates decrease, its net interest income will decrease. An institution having
more interest rate sensitive liabilities than interest rate sensitive assets
within a given time period is said to have a "negative gap," which generally
means that if interest rates increase, a company's net interest income will
decrease and if interest rates decrease, its net interest income will increase.
 
     The following table sets forth the cumulative repricing distributions as of
December 31, 1998 of the Company's interest-earning assets and interest-bearing
liabilities, its interest rate sensitivity gap, cumulative interest rate
sensitivity gap for such assets and liabilities, and cumulative interest rate
sensitivity gap as a percentage of total interest-earning assets. This table
indicates the time periods in which certain interest-earning assets and certain
interest-bearing liabilities will mature or may reprice in accordance with their
contractual terms. Core deposits and loans with non-contractual maturities are
included in the gap repricing distributions based upon historical patterns of
balance attrition and pricing behavior. The gap repricing distributions also
include principal cash flows from loans and mortgage-backed securities in the
time frames in which they are expected to be received. Mortgage prepayments are
estimated by applying industry median projections of prepayment speeds to
portfolio segments based on coupon range.
 
     Total interest-earning assets exceeded interest-bearing liabilities by
$551,249 at December 31, 1998. This difference was funded through
non-interest-bearing liabilities and shareholders' equity. The table below is
based on contractual maturities and repricing only and includes assumptions
regarding early loan and security repayments. The table below shows that the
total liabilities maturing or repricing within one year exceed assets maturing
or repricing within one year by $156,853. However, repricing of certain
categories of assets and liabilities is subject to competitive and other
influences that are
 
                                      S-21
<PAGE>   23
 
beyond the Corporation's control. Therefore, certain assets and liabilities
indicated as maturing or repricing within a stated period may, in fact, mature
or reprice in other periods or at different volumes.
 
<TABLE>
<CAPTION>
- ----------------------------------
                                         Maturity or Next Rate Adjustment Date
                                    -----------------------------------------------
                                       0-3          3-12         1-5        Over 5
        December 31, 1998             Months       Months       Years       Years       Total
- ------------------------------------------------------------------------------------------------
<S>                                 <C>          <C>          <C>          <C>        <C>
RATE SENSITIVE ASSETS (RSA)
  Loans and loans held for sale...  $1,183,726   $  774,958   $1,348,205   $126,463   $3,433,352
  Securities......................     145,395      197,183      414,025    239,823      996,426
  Federal funds sold..............      26,024                                            26,024
  Interest-bearing deposits.......       9,851                                             9,851
                                    ----------   ----------   ----------   --------   ----------
     Rate sensitive assets........  $1,364,996   $  972,141   $1,762,230   $366,286   $4,465,653
                                    ==========   ==========   ==========   ========   ==========
RATE SENSITIVE LIABILITIES (RSL)
  Interest-bearing deposits.......  $1,030,618   $1,030,642   $1,277,570   $ 10,345   $3,349,175
  Short-term borrowings, debt and
     FHLB advances................     344,796       87,934      118,200     14,299      565,229
                                    ----------   ----------   ----------   --------   ----------
       Rate sensitive
          liabilities.............  $1,375,414   $1,118,576   $1,395,770   $ 24,644   $3,914,404
                                    ==========   ==========   ==========   ========   ==========
  Gap(a)..........................  $  (10,418)  $ (146,435)  $  366,460   $341,642   $  551,249
  Cumulative gap..................     (10,418)    (156,853)     209,607    551,249
  Cumulative gap/Total RSA........       (.023)%      (3.51)%      (4.69)%    12.34%
</TABLE>
 
- --------------------------------------------------------------------------------
(a) Gap is defined as rate sensitive assets less rate sensitive liabilities and
    may be expressed in dollars or as a percentage.
 
EFFECTS OF INFLATION
 
     The assets and liabilities of the Company are primarily monetary in nature
and are more directly affected by the fluctuation in interest rates than
inflation. Movement in interest rates is a result of the perceived changes in
inflation as well as monetary and fiscal policies. Interest rates and inflation
do not necessarily move with the same velocity or within the same period;
therefore, a direct relationship to the inflation rate cannot be shown. The
financial information presented in this report has been prepared in accordance
with generally accepted accounting principles, which require that the Company
measure financial position and operating results primarily in terms of
historical dollars.
 
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
     The primary market risk to which the Company is exposed is interest rate
risk. The primary business of the Company and the composition of its balance
sheet consists of investments in interest-earning assets, which are funded by
interest-bearing liabilities. These financial instruments have varying levels of
sensitivity to changes in the market rates of interest, resulting in market
risk. None of the Company's financial instruments are held for trading purposes.
 
     One method the Company uses to manage its interest rate risk is a rate
sensitivity gap analysis, (see "Asset/Liability Management.") The Company also
monitors its interest rate risk through a sensitivity analysis, whereby it
measures potential changes in its future earnings and the fair values of its
financial instruments that may result from one or more hypothetical changes in
interest rates. This analysis is performed by estimating the expected cash flows
of the Company's financial instruments using interest rates in effect at
year-end 1998. For the fair value estimates, the cash flows are then discounted
to year-end to arrive at an estimated present value of the Company's financial
instruments. Hypothetical changes in interest rates are then applied to the
financial instruments, and the cash flows and fair values are again estimated
using these hypothetical rates. For the net interest income estimates, the
hypothetical rates are applied to the financial instruments based on the assumed
cash
 
                                      S-22
<PAGE>   24
 
flows. The Company applies these interest rate shocks to its financial
instruments up and down 200 basis points. The following table presents an
analysis of the potential sensitivity of the Company's annual net interest
income and present value of the Company's financial instruments to sudden and
sustained 200 basis-point changes in market interest rates:
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------
                                                              Year-end       ALCO
            One Year Net Interest Income Change                 1998      Guidelines
<S>                                                           <C>         <C>
- ------------------------------------------------------------------------------------
+200 Basis points...........................................    (1.4)%      (10.0)%
- -200 Basis points...........................................    (0.9)       (10.0)
- ------------------------------------------------------------------------------------
Net Present Value of Equity Change
- ------------------------------------------------------------------------------------
+200 Basis points...........................................   (12.1)%      (30.0)%
- -200 Basis points...........................................    10.5        (30.0)
- ------------------------------------------------------------------------------------
</TABLE>
 
     The projected volatility of net interest income and the net present value
of equity rates to a +/- 200 basis points change at December 31, 1998 fall well
within the Board of Directors guidelines.
 
     The above analysis is based on numerous assumptions, including relative
levels of market interest rates, loan prepayments and reactions of depositors to
changes in interest rates, and should not be relied upon as being indicative of
actual results. Further, the analysis does not necessarily contemplate all
actions the Company may undertake in response to changes in interest rates.
Information for certain affiliates was not available for year-end 1997.
 
YEAR 2000 SOFTWARE INITIATIVES
 
     Since 1996, the affiliates of Sky Financial Group, Inc. have been reviewing
the potential effects of the Year 2000 issue on the Company. Internally, the
Company, though its project staff, has invested more than 15,000 hours to date
on this project. The Company core project team has met monthly addressing both
internal and external issues. The team has identified over 650 systems that
could be potentially affected by the Year 2000 problem. These systems include
all information technology systems and computer chip embedded functions such as
vaults, elevators, security systems, heating and cooling equipment and other
operating facilities.
 
     Externally, the Company has contacted its business partners regarding their
Year 2000 preparedness. These partners include commercial customers, vendors,
service suppliers, data exchange vendors and utility companies. The Company's
affiliate banks have also sponsored educational seminars in select market areas
to educate commercial clients regarding Year 2000 issues.
 
     Four federal agencies share the responsibility to make sure financial
institutions are Year 2000 compliant. These agencies are conducting special
examinations of insured banks to see that they are taking the necessary steps to
be prepared for the century date change. The Company and its affiliates are
working closely with these regulators following their specific criteria to
assess our progress in Year 2000 readiness.
 
     The Company's efforts have been directed by a 5-phase plan to be completed
in preparation for the Year 2000. The phases were established by the federal
agencies which regulate financial institutions.
 
     Awareness -- Initially the Year 2000 issue was discussed at all levels of
the corporation for several purposes: to avoid purchasing any new systems which
weren't Year 2000 compliant; to gain the resources necessary to identify and fix
any existing equipment problems; and to consider Year 2000 compliance before
moving forward on all strategic business efforts.
 
     Assessment -- Project teams with representatives from each Sky Financial
Group, Inc. affiliate have met regularly to report on progress and share
information. More than 650 systems, including hardware, software, communications
equipment, data exchange vendors and suppliers were evaluated for potential Year
2000 issues. Business initiatives such as major systems development and system
interdependencies were also appraised.
                                      S-23
<PAGE>   25
 
     Renovation -- The Company's vendors were contacted in this phase to
determine the status of their systems and their plans to become Year 2000
compliant. For non-compliant systems, project team members decided whether to
replace, repair or retire the systems.
 
     Validation -- The Company has been testing all affected systems. Vendors
are also being tested at various locations during this phase. Those systems
which were modified or repaired are being re-tested as necessary. Testing
remains ongoing through the first half of 1999.
 
     Implementation -- This phase includes putting replaced or repaired systems
into production. As these systems are tested throughout 1999, the Company will
continue to update inventory, test changes and develop and test contingency
plans. Testing and validation of all critical systems will be complete by June
30, 1999.
 
     In the unlikely event critical systems fail to function after the century
date changes, contingency planning is underway. Alternative methods of doing
business have been developed and are in the process of being tested. These
methods address data gathering, customer service procedures, and staffing needs
before, during and after the year 2000 changeover. This planning also includes
non-compliance by third parties which may affect the Company's ability to
conduct business. We will have a completed contingency plan in place by June 30,
1999.
 
     Notwithstanding the Company's efforts to date to replace or repair affected
systems and develop contingency plans for potential risks, if the Company does
not complete all activities associated with resolving its Year 2000 issues, the
Company could be materially adversely affected as a result of not being able to
process transactions related to its core business activities. In addition,
non-compliance by the Company's business partners, including without limitation,
the Company's business customers, vendors, service suppliers and utilities,
could have a material adverse affect on the Company.
 
     The total cost of the Company's Year 2000 project is estimated at $900,000.
The majority of the costs have been internal in nature. Approximately 60% of
this cost relates to internal staff hours to work on the project. External costs
have been approximately $311,000 and include equipment replacement or upgrade,
seminar sponsorships, vendor payments, and customer communication and education.
 
FORWARD-LOOKING STATEMENTS
 
     This report includes forward-looking statements by the Company relating to
such matters as anticipated operating results, prospects for new lines of
business, technological developments, economic trends (including interest
rates), reorganization transactions and similar matters. The Private Securities
Litigation Reform Act of 1995 provides a safe harbor for forward-looking
statements, and the purpose of this paragraph is to secure the use of the safe
harbor provisions. While the Company believes that the assumptions underlying
the forward-looking statements contained herein and in other public documents
are reasonable, any of the assumptions could prove to be inaccurate, and
accordingly, actual results and experience could differ materially from the
anticipated results or other expectations expressed by the Company in its
forward-looking statements. Factors that could cause actual results or
experience to differ from results discussed in the forward-looking statements
include, but are not limited to: economic conditions; volatility and direction
of market interest rates; capital investment in and operating results of
non-banking business ventures of the Company; the ability of the Company's
broker/dealer subsidiary to recruit registered representatives; governmental
legislation and regulation; material unforeseen changes in the financial
condition or results of operations of the Company's customers; customer reaction
to and unforeseen complications with respect to the Company's restructuring or
integration of acquisitions; unforeseen difficulties in realizing expected cost
savings from acquisitions; product redesign initiative; the effect of the year
2000 on the Company, its computer systems, customers, vendors and service
suppliers; and other risks identified, from time-to-time in the Company's other
public documents on file with the Securities and Exchange Commission.
 
                                      S-24
<PAGE>   26
 
                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors and Shareholders
Sky Financial Group, Inc.
Bowling Green, Ohio
 
We have audited the accompanying consolidated balance sheets of Sky Financial
Group, Inc. as of December 31, 1998 and 1997 and the related consolidated
statements of income, comprehensive income, changes in shareholders' equity and
cash flows for each of the three years in the period ended December 31, 1998.
These financial statements are the responsibility of the Company's management.
Our responsibility is to express an opinion on these financial statements based
on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the consolidated financial position of Sky
Financial Group, Inc. as of December 31, 1998 and 1997 and the consolidated
results of its operations and its cash flows for each of the three years in the
period ended December 31, 1998 in conformity with generally accepted accounting
principles.
 
                                          CROWE, CHIZEK AND COMPANY LLP
                                          SIGNATURE
 
                                          Crowe, Chizek and Company LLP
 
Columbus, Ohio
February 16, 1999
 
                                      S-25
<PAGE>   27
 
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------
                                                                   December 31,
                 December 31, 1998 and 1997                   -----------------------
       (Dollars in thousands, except per share data)             1998         1997
- -------------------------------------------------------------------------------------
<S>                                                           <C>          <C>
ASSETS
Cash and due from banks.....................................  $  165,946   $  153,336
Interest-bearing deposits with financial institutions.......       9,851        7,051
Federal funds sold..........................................      26,024       39,726
Loans held for sale.........................................      77,471       19,314
Securities available for sale...............................     996,426      961,199
Securities held to maturity (Estimated fair value
  $88,018)..................................................          --       87,207
Total loans.................................................   3,355,881    3,144,439
     Less allowance for credit losses.......................     (54,008)     (40,376)
                                                              ----------   ----------
       Net loans............................................   3,301,873    3,104,063
Premises and equipment......................................      85,966       92,682
Accrued interest receivable and other assets................     151,564       97,725
                                                              ----------   ----------
       TOTAL ASSETS.........................................  $4,815,121   $4,562,303
                                                              ==========   ==========
LIABILITIES
Deposits
  Non-interest-bearing deposits.............................  $  483,487   $  414,509
  Interest-bearing deposits.................................   3,349,175    3,248,432
                                                              ----------   ----------
     Total deposits.........................................   3,832,662    3,662,941
Securities sold under repurchase agreements and federal
  funds purchased...........................................     207,458      182,362
Debt and Federal Home Loan Bank advances....................     357,771      285,695
Accrued interest payable and other liabilities..............      73,388       44,027
                                                              ----------   ----------
       TOTAL LIABILITIES....................................   4,471,279    4,175,025
                                                              ----------   ----------
SHAREHOLDERS' EQUITY
Serial preferred stock, $10.00 par value; 10,000,000 shares
  authorized; none issued...................................          --           --
Common stock, no par value; 150,000,000 shares authorized;
  45,082,890 and 46,004,419 shares issued in 1998 and
  1997......................................................     311,360      218,881
Retained earnings...........................................      27,816      165,742
Treasury stock; 57,063 and 186,422 shares in 1998 and
  1997......................................................      (1,500)      (4,096)
ESOP obligations and unearned shares........................          --         (325)
Accumulated other comprehensive income......................       6,166        7,076
                                                              ----------   ----------
       TOTAL SHAREHOLDERS' EQUITY...........................     343,842      387,278
                                                              ----------   ----------
       TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY...........  $4,815,121   $4,562,303
                                                              ==========   ==========
- -------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of the financial statements.
 
                                      S-26
<PAGE>   28
 
                       CONSOLIDATED STATEMENTS OF INCOME
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
    For the years December 31, 1998, 1997 and 1996
     (Dollars in thousands, except per share data)              1998           1997           1996
<S>                                                           <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------
INTEREST INCOME
Loans, including fees..................................       $296,682       $281,902       $257,355
Securities
Taxable................................................         58,455         57,502         55,557
Nontaxable.............................................          4,927          5,123          5,683
Federal funds sold and other...........................          3,616          3,004          4,455
                                                              --------       --------       --------
  Total interest income................................        363,680        347,531        323,050
                                                              --------       --------       --------
INTEREST EXPENSE
Deposits...............................................        146,385        142,216        137,288
Borrowed funds.........................................         30,171         24,701         13,648
                                                              --------       --------       --------
  Total interest expense...............................        176,556        166,917        150,936
                                                              --------       --------       --------
Net Interest Income....................................        187,124        180,614        172,114
Provision for Credit Losses............................         24,968         10,928          7,713
                                                              --------       --------       --------
Net Interest Income After Provision for Credit
  Losses...............................................        162,156        169,686        164,401
                                                              --------       --------       --------
OTHER INCOME
Trust department income................................          5,434          4,269          3,291
Service charges and fees on deposit accounts...........         15,248         14,691         12,509
Mortgage banking income................................         24,501         15,525         12,093
Brokerage commissions..................................          9,430          6,083          9,156
Collection agency fees.................................          4,115          5,053          4,213
Net securities gains (losses)..........................          1,194           (118)         1,553
Net gains on sales of commercial financing loans.......         19,378         13,027          2,992
Other income...........................................         17,914         23,637         16,437
                                                              --------       --------       --------
  Total other income...................................         97,214         82,167         62,244
                                                              --------       --------       --------
OTHER EXPENSES
Salaries and employee benefits.........................         93,639         86,461         71,228
Occupancy and equipment expense........................         26,056         24,245         22,264
Merger, integration, and restructuring expense.........         54,487          1,603            838
Other operating expense................................         58,526         52,474         54,801
                                                              --------       --------       --------
  Total other expenses.................................        232,708        164,783        149,131
                                                              --------       --------       --------
Income Before Income Taxes.............................         26,662         87,070         77,514
Income Taxes...........................................          8,854         27,750         24,364
                                                              --------       --------       --------
  Net Income...........................................       $ 17,808       $ 59,320       $ 53,150
                                                              ========       ========       ========
  Net Income Available to Common Shareholders..........       $ 17,808       $ 58,715       $ 50,743
                                                              ========       ========       ========
Basic Earnings Per Common Share........................       $    .39       $   1.29       $   1.14
                                                              ========       ========       ========
Diluted Earnings Per Common Share......................       $    .39       $   1.27       $   1.11
                                                              ========       ========       ========
- ----------------------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of the financial statements.
 
                                      S-27
<PAGE>   29
 
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
                                                                                   ESOP
For the years December 31, 1998,                                                Obligation    Accumulated
         1997 and 1996                                                             and           Other
     (Dollars in thousands,       Preferred    Common    Retained    Treasury    Unearned    Comprehensive
     except per share data)         Stock      Stock     Earnings     Stock       Shares        Income        Total
- ---------------------------------------------------------------------------------------------------------------------------
<S>                               <C>         <C>        <C>         <C>        <C>          <C>             <C>        <C>
Balance, December 31, 1995.....   $ 35,569    $197,843   $ 134,027   $ (8,445)    $(331)        $ 4,290      $362,953
Net income.....................                             53,150                                             53,150
Preferred cash dividends.......                             (2,407)                                            (2,407)
Common cash dividends
  ($.38 per share).............                            (20,981)                                           (20,981)
Common stock dividend..........                (3,271)     (14,604)    17,875
Unrealized losses on securities
  available for sale...........                                                                  (3,779)       (3,779)
Treasury shares acquired.......                                       (11,020)                                (11,020)
Treasury shares issued.........                                           412                                     412
Preferred stock conversions....     (5,476)     5,476
Pre-merger acquisition of pooled
  affiliate common shares......                (1,127)                                                         (1,127)
Fractional shares and other
  items........................                   117          (41)                 (82)                           (6)
                                  --------    --------   ---------   --------     -----         -------      --------
Balance, December 31, 1996.....     30,093    199,038      149,144     (1,178)     (413)            511       377,195
Net income.....................                             59,320                                             59,320
Preferred cash dividends.......                               (605)                                              (605)
Common cash dividends
  ($.51 per share).............                            (25,024)                                           (25,024)
Common stock dividend..........                10,608      (17,020)     6,412
Unrealized gains on securities
  available for sale...........                                                                   6,565         6,565
Treasury shares acquired.......                                       (10,217)                                (10,217)
Treasury shares issued.........                   481                     887                                   1,368
Preferred stock conversions....    (17,213)    17,213
Preferred stock retired........    (12,880)    (8,921)                                                        (21,801)
Fractional shares and other
  items........................                   462          (73)                  88                           477
                                  --------    --------   ---------   --------     -----         -------      --------
Balance, December 31, 1997.....         --    218,881      165,742     (4,096)     (325)          7,076       387,278
Net income.....................                             17,808                                             17,808
Common cash dividends
  ($.65 per share).............                            (30,921)                                           (30,921)
Common stock dividend..........               124,779     (124,779)
Unrealized losses on securities
  available for sale...........                                                                    (910)         (910)
Treasury shares acquired.......                                       (32,067)                                (32,067)
Treasury shares issued.........                (3,417)                  5,780                                   2,363
Canceled treasury shares.......               (28,883)                 28,883
Change in ESOP debt and release
  of shares....................                                                     325                           325
Fractional shares and other
  items........................                                (34)                                               (34)
                                  --------    --------   ---------   --------     -----         -------      --------
Balance, December 31, 1998.....   $     --    $311,360   $  27,816   $ (1,500)    $  --         $ 6,166      $343,842
                                  ========    ========   =========   ========     =====         =======      ========
- ------------------------------------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of the financial statements.
 
                                      S-28
<PAGE>   30
 
                CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------
       For the years December 31, 1998, 1997 and 1996
       (Dollars in thousands, except per share data)           1998      1997      1996
- -----------------------------------------------------------------------------------------------
<S>                                                           <C>       <C>       <C>       <C>
NET INCOME..................................................  $17,808   $59,320   $53,150
  Other comprehensive income:
     Unrealized gains (losses) arising during period........     (181)    9,976    (4,261)
     Reclassification adjustment for (gains) losses included
       in income............................................   (1,194)      118    (1,553)
                                                              -------   -------   -------
     Net unrealized gain (loss) on securities available for
       sale.................................................   (1,375)   10,094    (5,814)
     Tax effect.............................................      465    (3,529)    2,035
                                                              -------   -------   -------
          Total other comprehensive income (loss)...........     (910)    6,565    (3,779)
                                                              -------   -------   -------
COMPREHENSIVE INCOME........................................  $16,898   $65,885   $49,371
                                                              =======   =======   =======
- -----------------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of the financial statements.
 
                                      S-29
<PAGE>   31
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
       For the years December 31, 1998, 1997 and 1996
                   (Dollars in thousands)                       1998         1997           1996
- -----------------------------------------------------------------------------------------------------
<S>                                                           <C>          <C>          <C>       <C>
OPERATING ACTIVITIES
Net income..................................................  $  17,808    $  59,320    $  53,150
Adjustments to reconcile net income to net cash provided by
  operating activities:
Depreciation, amortization and valuation adjustments........     31,228       16,715       14,176
Net gains on sales of assets................................    (45,000)     (35,707)     (18,182)
Provision for credit losses.................................     24,968       10,928        7,713
Net decrease (increase) in loans held for sale..............    (15,633)      23,529        4,520
Net change in other assets and liabilities..................    (15,570)      (2,735)       8,891
                                                              ---------    ---------    --------- ---
  NET CASH FROM OPERATING ACTIVITIES........................     (2,199)      72,050       70,268
                                                              ---------    ---------    --------- ---
INVESTING ACTIVITIES
Net decrease (increase) in interest-bearing deposits with
  financial institutions....................................     (2,800)      (2,605)         350
Net decrease (increase) in federal funds sold...............     13,702       (1,960)      74,402
Securities available for sale:
Proceeds from maturities and payments.......................    444,342      213,482      245,452
Proceeds from sales.........................................     41,066       91,060       55,983
Purchases...................................................   (453,763)    (349,369)    (234,798)
Securities held to maturity:
Proceeds from maturities and payments.......................     20,260       59,723       49,888
Purchases...................................................       (395)     (58,444)     (57,565)
Proceeds from sales of loans................................     35,240       33,670       43,845
Net increase in loans.......................................   (255,841)    (213,749)    (342,877)
Purchases of premises and equipment.........................    (14,502)     (19,658)     (15,372)
Purchases of life insurance contracts.......................    (30,350)     (20,000)        (500)
Purchases of loans..........................................         --      (11,989)      (3,604)
Proceeds from sales of premises and equipment...............        978        2,489          782
Proceeds from sales of other real estate....................        863        3,340          789
Cash acquired through acquisitions..........................         --           --           80
                                                              ---------    ---------    --------- ---
  NET CASH FROM INVESTING ACTIVITIES........................   (201,200)    (274,010)    (183,145)
                                                              ---------    ---------    --------- ---
FINANCING ACTIVITIES
Cash transferred in connection with sale of branch
  deposits..................................................         --      (84,927)          --
Purchases of branch deposits, net...........................         --       64,605       51,116
Net increase in deposit accounts............................    169,721      106,641       53,340
Net increase (decrease) in federal funds and repurchase
  agreements................................................     25,096       (6,000)      77,964
Net (decrease) increase in short-term FHLB advances.........    (76,278)      92,710      (21,500)
Proceeds from issuance of debt and long-term FHLB
  advances..................................................    260,314      137,175       21,350
Repayment of debt and long-term FHLB advances...............   (111,960)     (49,707)     (42,984)
Cash dividends and fractional shares paid...................    (21,471)     (25,249)     (23,404)
Pre-merger acquisition of pooled affiliate common stock.....         --           --       (1,127)
Preferred stock retired.....................................         --      (21,801)          --
Proceeds from issuance of common stock......................      2,363        1,368          412
Treasury stock purchases....................................    (32,067)     (10,217)     (11,020)
Other items.................................................        291       (1,115)          79
                                                              ---------    ---------    --------- ---
  NET CASH FROM FINANCING ACTIVITIES........................    216,009      203,483      104,226
                                                              ---------    ---------    --------- ---
Net Increase (Decrease) in Cash and Due From Banks..........     12,610        1,523       (8,651)
Cash and Due From Banks at Beginning of Year................    153,336      151,813      160,464
                                                              ---------    ---------    --------- ---
Cash and Due From Banks at End of Year......................  $ 165,946    $ 153,336    $ 151,813
                                                              =========    =========    ========= ===
Noncash transactions:
  Securitization of loans held for sale.....................  $     241    $   6,344    $  73,527
                                                              =========    =========    ========= ===
- -----------------------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of the financial statements.
 
                                      S-30
<PAGE>   32
 
                           SKY FINANCIAL GROUP, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
NOTE 1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Sky Financial Group, Inc. (the Company) is a bank holding company
headquartered in Bowling Green, Ohio, which owns and operates three banks
primarily engaged in the commercial banking business. The Company also operates
businesses relating to collection activities, broker-dealer operations,
commercial finance lending, and other financial related services.
 
     A new accounting standard changes the way public companies report
information about their operating segments in annual and interim financial
statements. The standard, applicable in 1998, adopts a management approach to
determine operating segments and then imposes quantitative criteria to determine
which operating segments, if any, must be reported. See Note 20 for disclosure
of the Company's business segments.
 
     Basis of Presentation -- The accounting and reporting policies followed by
the Company conform to generally accepted accounting principles and to general
practices within the financial services industry. The preparation of financial
statements in conformity with generally accepted accounting principles requires
management to make estimates and assumptions that affect the reported amount of
assets and liabilities and disclosure of contingent assets and liabilities at
the date of the financial statements. Actual results could differ from those
estimates. The allowance for loan losses and fair values of financial
instruments are particularly subject to change.
 
     These consolidated financial statements give retroactive effect to the
merger transactions accounted for by the pooling of interests method as
discussed in Note 2. Certain amounts in the prior consolidated financial
statements and pooled affiliates financial statements have been reclassified to
conform to the current presentation.
 
     Consolidation -- The consolidated financial statements of the Company
include the accounts of The Citizens Banking Company ("Citizens"), Mid American
National Bank and Trust Company ("Mid Am Bank"), The Ohio Bank ("Ohio Bank"),
First National Bank Northwest Ohio ("First National"), Adrian State Bank
("Adrian"), Sky Asset Management Services, Inc. ("SAMSI"), Sky Investments, Inc.
("SII"), Mid Am Credit Corp. ("MACC"), Mid Am Financial Services, Inc.
("MAFSI"), Simplicity Mortgage Consultants, Inc. ("Simplicity"), Mid Am Private
Trust, N.A. ("MAPT"), Sky Technology Resources, Inc. ("Sky Tech"), Mid Am
Capital Trust I ("MACT"), ValueNet (a wholly-owned subsidiary of Citizens),
Freedom Financial Life Insurance Company, Freedom Express, Inc. and various
other insignificant subsidiaries. All significant intercompany transactions and
accounts have been eliminated in consolidation.
 
     In January 1999, First National and Adrian were merged into Mid Am Bank. In
December 1998, American Community Bank, N.A.("AmeriCom") and AmeriFirst Bank,
N.A. ("AmeriFirst") were merged into Ohio Bank and Century National Bank
("Century") was merged into Citizens. In July 1998, First National Bank of
Chester ("Chester") was merged into Citizens. All of these transactions were
accounted for as internal reorganizations, similar to a pooling of interests.
 
     Cash and Due from Banks -- The Company's subsidiary banks are required to
have cash on hand or on deposit with the Federal Reserve Bank to meet regulatory
reserve requirements. The reserve requirements at December 31, 1998 and 1997
approximated $49,364 and $41,513, respectively. These balances do not earn
interest.
 
     Securities -- The Company classifies its securities as held to maturity,
trading or available for sale. Securities classified as available for sale are
carried at estimated fair value. Securities classified as available for sale are
those that management intends to sell or that could be sold for liquidity,
investment management or similar reasons, even if there is not a present
intention to make such a sale.
                                      S-31
<PAGE>   33
 
NOTE 1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
Equity securities that have a readily determinable fair value are also
classified as available for sale. The unrealized appreciation or depreciation
from these securities' acquisition costs is recorded in a valuation account, net
of the applicable income tax effect, in the shareholders' equity section of the
balance sheet. Securities classified as held to maturity are stated at cost,
adjusted for amortization of premiums and accretion of discounts using the
interest method. Securities classified as held to maturity are those that
management has the positive intent and ability to hold to maturity. Trading
securities are acquired for sale in the near term and are carried at fair value,
with unrealized holding gains and losses reflected in earnings. The Company held
no trading securities during any period presented. Amortization of premiums and
accretion of discounts are recorded in interest income using the interest method
over the period to maturity, which is sometimes estimated. Gains and losses on
security sales are calculated using the specific identification method to
determine the security's cost.
 
     Derivative Financial Instruments -- The Company's hedging policies permit
the use of interest rate swaps, caps and floors to manage interest rate risk or
to hedge specified assets and liabilities. Derivative financial instruments are
not used for trading purposes. Through December 31, 1998, the Company has not
used any derivative financial instruments for hedging purposes, but may do so in
the future.
 
     Pledged Securities -- The carrying value of securities pledged to secure
public and trust deposits, securities sold under agreements to repurchase and
for other purposes as required by law amounted to $624,078 and $584,404 at
December 31, 1998 and 1997, respectively.
 
     Loans Held for Sale -- Certain residential mortgage loans are originated
for sale in the secondary mortgage-loan market. Additionally, certain other
loans and leases are periodically identified to be sold. These loans and leases
are classified as loans held for sale and carried at the lower of cost or
estimated fair value taken together. Fair value is determined on the basis of
rates quoted in the respective secondary market for the type of loan or lease
held for sale. Loans and leases are generally sold at a premium or discount from
the carrying amount of the loans. Such premium or discount is recognized at the
date of sale. Fixed commitments may be used at the time loans are originated or
identified for sale to mitigate interest rate risk.
 
     Mortgage Servicing Rights -- The cost of mortgage loans which the Company
originates or purchases under a definitive plan to sell or securitize is
allocated between the mortgage servicing rights and the cost of the mortgage
based on the relative fair values at date of origination or purchase. The fair
value of the mortgage servicing rights is determined by discounting expected
servicing income cash flows, net of certain servicing costs. The cost of those
mortgage loans which are originated or purchased without a definitive plan to
sell or securitize is not allocated between mortgage servicing rights and the
cost of the mortgage until the date of sale or securitization.
 
     Mortgage servicing rights assets are amortized in proportion to and over
the period of estimated net servicing income. Management periodically evaluates
mortgage servicing assets for impairment by discounting the expected future cash
flows, taking into consideration the estimated level of prepayments based upon
current industry expectations.
 
     Interest and Fees on Loans -- Interest income on loans is accrued over the
term of the loans using the simple-interest method based on the amount of
principal outstanding. The accrual of interest is discontinued on a loan when
management believes that the collection of interest is doubtful. Restructured
loans are those loans on which concessions in terms have been granted because of
a borrower's financial difficulty. Interest is generally accrued on such loans
in accordance with their original contractual rates. Loan origination and
commitment fees and certain direct loan origination costs are deferred and
amortized as an adjustment to the related loan's yield. The Company is
amortizing these amounts over the contractual life of the related loans.
 
                                      S-32
<PAGE>   34
 
NOTE 1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
     Allowance for Credit Losses -- The allowance for credit losses is an amount
that management believes will be adequate to absorb losses inherent in existing
loans and leases and is established through a provision for credit losses
charged to expense. Loans and leases are charged against the allowance for
credit losses when management believes the full collectibility of the loan is
unlikely. In establishing the allowance and provision, management takes into
consideration such factors as changes in the nature and volume of the portfolio,
overall portfolio quality, loan concentrations, specific problem loans, leases
and commitments, and current and anticipated economic conditions that may affect
the borrowers' ability to pay. In management's quarterly analysis, risk factors
are applied to categories of similar credits segregated by loan type, repayment
source, geographic lending area, the results of internal grading systems,
regulatory examination findings and other known factors which may impact the
amount of losses inherent in the category. The corporate allowance for loan and
lease losses policy calls for risk factors to be determined through
consideration of the Company's actual or industry average net loss experience
and allocations of the allowance are established based on the application of
these factors to a category. Additionally, allocations of the allowance may be
established for specific problem credits, including impaired loans. Allowances
established to provide for losses under commitments to extend credit, or
recourse provisions under loan and lease sales agreements or servicing
agreements are classified with other liabilities.
 
     A loan is considered impaired when it is probable that not all principal
and interest amounts will be collected according to the loan contract.
Residential mortgage, installment and other consumer loans are collectively
evaluated for impairment. Individual commercial loans exceeding size thresholds
established by management are evaluated for impairment. Impaired loans are
recorded at the loan's fair value by the establishment of a specific allowance
where necessary. The fair value of collateral-dependent loans is determined by
the fair value of the underlying collateral. The fair value of
noncollateral-dependent loans is determined by discounting expected future
interest and principal payments at the loan's effective interest rate.
 
     Other Real Estate Owned -- Real estate acquired in settlement of a loan is
carried in other assets at the lower of the recorded investment in the property
or its fair value. Prior to foreclosure, the value of the underlying loan is
written down to the fair value of the real estate to be acquired by a charge to
the allowance for credit losses, if necessary. At the time of foreclosure, an
allowance is established for estimated selling costs. Any subsequent write-downs
required by changes in estimated fair value or disposal expenses are provided
through this allowance and the provision is charged to operating expense.
Carrying costs of such properties, net of related income, and gains and losses
on their disposition are charged or credited to operating expense as incurred.
At December 31, 1998 and 1997, other real estate owned totaled $1,330 and $767.
 
     Premises and Equipment -- Premises and equipment are stated at cost, less
accumulated depreciation which is computed primarily using the straight-line
method. The adjusted cost of the specific assets sold or disposed of is used to
compute gains or losses on disposal. These assets are reviewed for impairment
when events indicate their carrying value may not be recoverable.
 
     Intangible Assets -- Goodwill is amortized using the straight-line method
over periods ranging from 15 to 25 years. Core deposit intangible assets
acquired before 1992 are amortized using the straight-line method over periods
ranging from 10 to 15 years. Core deposit intangible assets acquired on or after
January 1, 1992 are amortized using an accelerated method over periods ranging
from 10 to 15 years. Net intangible assets at December 31, 1998 and 1997
aggregated $14,065 and $21,216, respectively.
 
     Merger, Integration and Restructuring Expense -- Included in other
operating expense is a charge for merger, integration and restructuring
expenses, which primarily represents professional fees, other personnel related
costs, valuation adjustments for certain premises, equipment and other assets,
and integration costs related to mergers and acquisitions. (See Note 13.)
 
                                      S-33
<PAGE>   35
 
NOTE 1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
     Income Taxes -- The Company utilizes an asset and liability approach for
financial accounting and reporting of income taxes. The provision for income
taxes is the sum of taxes currently payable and the change in deferred tax
assets and liabilities. Deferred income taxes are provided using the current tax
rate for differences between the tax basis of assets and liabilities and their
carrying amounts for financial reporting purposes.
 
     Trust Activities -- Income from trust fiduciary activities has been
recognized on the accrual basis. Assets held by the Company in fiduciary or
agency capacities (other than cash on deposit at the Company's bank
subsidiaries) for its customers are not included in the consolidated statement
of condition as such items are not assets of the Company.
 
     Transfers of Financial Assets -- Effective January 1, 1997, the Company
adopted SFAS No. 125, "Accounting for Transfers and Servicing of Financial
Assets and Extinguishments of Liabilities." SFAS 125 established new accounting
and reporting standards for transfers and servicing of financial assets and
extinguishment of liabilities. SFAS 125 focuses on the concept of control. Under
this approach, after a transfer of financial assets, the Company recognizes the
financial and servicing assets it controls and the liabilities it has incurred,
and derecognizes financial assets when control has been surrendered, and
derecognize liabilities when extinguished.
 
     The Company transfers certain residential mortgage loans originated by its
bank subsidiaries and MAFSI and loans and leases originated by MACC. The Company
accounts for these transfers as sales under the provisions of SFAS 125;
accordingly, the loans and leases transferred have been derecognized. The
Company had accounted for these transfers as sales prior to the issuance of SFAS
125; therefore, the impact of adopting SFAS 125 was not material to the 1997
results of operations.
 
     Stock Dividends and Treasury Stock -- Shares of the Company's stock are
acquired for reissuance in connection with stock option plans and for future
stock dividend declarations. The treasury shares acquired are recorded at cost.
Stock dividends are recorded at fair market value to the extent of available
retained earnings.
 
     Stock-Based Compensation -- Pro forma disclosures of compensation cost of
stock-based awards have been determined using the fair value method which
considers the time value of the option considering the volatility of the
Company's stock and the risk-free interest rate over the expected life of the
option using a Black-Scholes valuation model.
 
     Statement of Cash Flows -- The Company considers cash on hand, deposits
maintained with the Federal Reserve Bank and cash due from other banks, all of
which are included in the caption Cash and Due from Banks, as cash for purposes
of the Statement of Cash Flows. The Company reports net cash flows for federal
funds sold, interest-bearing deposits with other financial institutions,
customer loan transactions, deposit transactions, repurchase agreements, and
short-term borrowings. For the years ended December 31, 1998, 1997 and 1996 the
Company paid interest of $177,791, $164,712 and $151,719, and income taxes of
$27,860, $32,543 and $21,275.
 
     Comprehensive Income -- Comprehensive income consists of net income and
other comprehensive income. Other comprehensive income includes unrealized gains
and losses on securities available for sale which are also recognized as
separate components of equity. The accounting standard that requires reporting
comprehensive income first applies for 1998, with prior information restated to
be comparable.
 
     New Accounting Pronouncements -- Beginning January 1, 2000, a new
accounting standard will require all derivatives to be recorded at fair value.
Unless designated as hedges, changes in these fair values will be recorded in
the income statement. Fair value changes involving hedges will generally be
recorded by offsetting gains and losses on the hedge and on the hedged item,
even if the fair value of the hedged item is not otherwise recorded. This is not
expected to have a material effect, but the effect will depend on derivative
holdings when this standard applies.
                                      S-34
<PAGE>   36
 
NOTE 1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
     Mortgage loans originated in mortgage banking are converted into securities
on occasion. A new accounting standard for 1999 will allow classifying these
securities as available for sale, trading, or held to maturity, instead of the
current requirement to classify as trading. This is not expected to have a
material effect, but the effect will vary depending on the level and designation
of securitizations as well as on market price movements.
 
NOTE 2.  MERGERS, ACQUISITIONS, BUSINESS FORMATIONS AND DIVESTITURES
 
     Effective December 17, 1998, the Company executed a definitive agreement
with Wood Bancorp, Inc. and its affiliate, First Federal Bank, Bowling Green,
Ohio. First Federal Bank is a $167 million federal savings bank with seven
offices in northwest Ohio. Wood Bancorp shareholders will receive 0.7315 shares
of Company stock for each share of Wood Bancorp stock in a tax-free exchange to
be accounted for as a pooling of interests. Approximately 2.1 million Company
common shares are expected to be issued in the merger. It is anticipated that
the transaction will be completed in the third quarter of 1999, pending
regulatory approvals and approval of Wood Bancorp's shareholders. Immediately
following the affiliation, First Federal will be merged into Mid American
National Bank & Trust Company.
 
     Effective December 14, 1998, the Company executed a definitive agreement
with First Western Bancorp, Inc., a $2.2 billion bank holding company
headquartered in New Castle, Pennsylvania. First Western shareholders will
receive 1.211 shares of Company common stock for each share of First Western
common stock in a tax-free exchange to be accounted for as a pooling of
interests. Approximately 13.5 million Company common shares are expected to be
issued in the merger. It is anticipated that the transaction will be completed
in the third quarter of 1999, pending regulatory and shareholder approvals.
First Western's bank affiliate, First Western Bank, N.A., will be merged into
Citizens Banking Company immediately following the affiliation.
 
     Effective December 4, 1998, The Ohio Bank, Findlay, Ohio, affiliated with
the Company in a transaction accounted for as a pooling of interests. In
conjunction with the merger, Bancshares changed its name to Sky Financial Group,
Inc. Shareholders of The Ohio Bank received 69.575 Company common shares of
stock in exchange for each share of The Ohio Bank stock owned, with cash paid in
lieu of fractional shares. A total of 5.8 million Company common shares were
issued in the merger. The Ohio Bank had assets of approximately $600 million,
with 17 banking offices in western, central and northeastern Ohio. The Ohio Bank
is operated as a wholly-owned subsidiary of the Company.
 
     Effective October 2, 1998, Citizens Bancshares, Inc. ("Bancshares") and Mid
Am, Inc. ("Mid Am") affiliated in a merger-of-equals transaction which was
accounted for as a pooling of interests. In conjunction with the merger,
Bancshares changed its name to Sky Financial Group, Inc. Shareholders of Mid Am
received 0.847 shares of Company common stock for each share of Mid Am stock
owned, with cash paid in lieu of fractional shares. A total of 19.8 million
Company common shares were issued in the merger. Mid Am had assets of
approximately $2.3 billion, with 83 banking offices located in western Ohio and
southern Michigan. Of its five bank affiliates, Mid Am Bank, Adrian and First
National were wholly-owned subsidiaries of the Company at year end 1998, while
AmeriCom and AmeriFirst were merged into Ohio Bank. Mid Am also owned 9
financial services subsidiaries, now subsidiaries of the Company, which engage
in lines of business closely related to banking.
 
     Effective May 12, 1998, Century Financial Corporation, Rochester,
Pennsylvania (CFC), merged into the Company. The transaction was affected
through the exchange of 0.8719 common shares of Company common stock for each of
Century's outstanding common shares, with cash paid in lieu of fractional
shares. A total of 4.5 million Company common shares were issued in the merger.
CFC had assets of approximately $453,000 with 13 branches in Beaver and Butler
counties in Pennsylvania. Century National Bank, CFC's bank subsidiary, is now
operated as part of Citizens' branch network.
 
                                      S-35
<PAGE>   37
 
NOTE 2.  MERGERS, ACQUISITIONS, BUSINESS FORMATIONS AND DIVESTITURES (CONTINUED)
     Effective March 6, 1998, UniBank, Steubenville, Ohio, affiliated with the
Company by merging into Citizens. The transaction was affected through the
exchange of 29.15 common shares of Company common stock for each of UniBank's
outstanding common shares, with cash paid in lieu of fractional shares. A total
of 2.1 million Company common shares were issued in the merger. UniBank had
assets of approximately $216,000 with 12 offices in Jefferson and Columbiana
counties in Ohio, and is operated as part of Citizens' branch network.
 
     The transactions were accounted for as poolings of interests. The following
is a summary of the separate results of operations of the Company, Mid Am, The
Ohio Bank, Century and UniBank for the years ended December 31:
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------
                                                                     1997           1996
<S>                                                                <C>            <C>
- ------------------------------------------------------------------------------------------
Net interest income
  Company...................................................       $ 42,625       $ 42,533
  Mid Am....................................................         89,526         84,914
  The Ohio Bank.............................................         22,630         20,635
  Century...................................................         17,396         16,698
  UniBank...................................................          8,437          7,334
                                                                   --------       --------
     Combined...............................................       $180,614       $172,114
                                                                   ========       ========
Net income
  Company...................................................       $ 16,756       $ 14,706
  Mid Am....................................................         30,881         25,992
  The Ohio Bank.............................................          6,019          5,428
  Century...................................................          4,222          4,906
  UniBank...................................................          1,442          2,118
                                                                   --------       --------
     Combined...............................................       $ 59,320       $ 53,150
                                                                   ========       ========
- ------------------------------------------------------------------------------------------
</TABLE>
 
     Following is a summary of the 1998 results of operations of the previously
separate affiliates for the year-to-date period through the quarter-end
immediately preceding the date of their respective mergers into the Company, as
indicated below:
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
                                                      Year-to-Date          Net Interest         Net
                (unaudited)                          Period Ending             Income          Income
<S>                                                <C>                      <C>                <C>
- ------------------------------------------------------------------------------------------------------
Century.....................................       March 31, 1998             $ 4,335          $ 1,363
Mid Am......................................       September 30, 1998          67,906           23,053
The Ohio Bank...............................       September 30, 1998          18,262            5,501
- ------------------------------------------------------------------------------------------------------
</TABLE>
 
     On November 21, 1997, the Company acquired the Martins Ferry, St.
Clairsville and Barnsville, Ohio branches of Metropolitan Savings Bank of Ohio,
an affiliate of FNB Corporation, Hermitage, Pennsylvania. In the transaction,
Bancshares acquired $25.2 million of loans and approximately $1 million of other
assets, assumed $64.2 million of deposit liabilities and received approximately
$32.9 million of funds. The Company paid a premium of $5.8 million in the
transaction, which is reflected in other assets in the consolidated balance
sheet and is being amortized on an accelerated basis over 15 years.
 
     On May 16, 1997, prior to its merger, UniBank assumed certain deposit
liabilities and purchased certain assets from National City Bank, Northeast. In
the transaction, UniBank received $31.2 million of funds and approximately $1
million of other assets, and assumed $34.1 million of deposit liabilities.
UniBank paid a premium of $1.9 million on the transaction, which is reflected in
other assets in the consolidated balance sheet and is being amortized on an
accelerated basis over 10 years.
 
                                      S-36
<PAGE>   38
 
NOTE 2.  MERGERS, ACQUISITIONS, BUSINESS FORMATIONS AND DIVESTITURES (CONTINUED)
     On February 17, 1997, Mid Am, Inc., prior to its merger, sold seven of its
branches in the metropolitan Cincinnati area to Star Banc Corporation. The
branch sale included the transfer of $95,000 of deposits. The branch sales
resulted in a pre-tax gain of $8,703 (after-tax $5,657).
 
     In January, 1997, MAFSI commenced operations as a consumer finance unit,
which specializes in non-conforming residential mortgage and consumer loans on a
nationwide basis. MAFSI is headquartered in Indianapolis, Indiana.
 
     In January, 1997, MAPT was formed to provide trust and investment
management services to families and individuals with substantial assets and to
corporate trustees. MAPT is headquartered in Cleveland, Ohio.
 
     During 1996, Mid Am, Inc., prior to its merger, completed its acquisition
of Simplicity, an Indiana-based mortgage brokerage company, and National
Recovery Services, Professional Adjustment of Ft. Myers, Florida, and Gulf Coast
Collection Bureau, Inc., Florida-based collection agencies. The aggregate
purchase price of the four transactions was $1,500 and included $551 cash and
the issuance of 51,598 shares of Company common stock. The results of operations
includes the results of the acquired entities from the dates of their respective
acquisitions.
 
     The Company also entered a merger transaction on October 11, 1996, with The
Navarre Deposit Bank Company, Navarre, Ohio. The Company issued 1.1 million
shares in the Navarre transaction, which was accounted for as a pooling of
interests.
 
     In April 1996, Mid Am Credit Corp. commenced operations as a full-service
loan and leasing financing unit. MACC's lending and leasing efforts are
concentrated primarily on medical and dental equipment and practice acquisition
financing on a nationwide basis. MACC, a wholly-owned subsidiary of the Company,
is headquartered in Columbus, Ohio, with a satellite office in Los Angeles,
California. MACC sells substantially all of the loans and leases to investors in
the secondary market.
 
NOTE 3.  SECURITIES
 
     The amortized costs, unrealized gains and losses and estimated fair values
at year-end are as follows:
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------
                                                              Gross            Gross          Estimated
                                            Amortized       Unrealized       Unrealized         Fair
                1998                          Cost            Gains            Losses           Value
<S>                                         <C>             <C>              <C>              <C>
- -------------------------------------------------------------------------------------------------------
SECURITIES AVAILABLE FOR SALE
U.S. Treasury and U.S. Government
  agencies and corporations..........       $242,202         $ 2,793          $  (349)        $244,646
Obligations of states and political
  subdivisions.......................        108,180           2,370             (311)         110,239
Corporate and other securities.......         14,922             119             (130)          14,911
Mortgage-backed securities...........        534,376           5,004           (1,907)         537,473
                                            --------         -------          -------         --------
  Total debt securities available for
     sale............................        899,680          10,286           (2,697)         907,269
Marketable equity securities.........         87,268           4,522           (2,633)          89,157
                                            --------         -------          -------         --------
  Total securities available for
     sale............................       $986,948         $14,808          $(5,330)        $996,426
                                            ========         =======          =======         ========
- -------------------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-37
<PAGE>   39
 
NOTE 3.  SECURITIES (CONTINUED)
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                               Gross            Gross          Estimated
                                             Amortized       Unrealized       Unrealized         Fair
                 1997                          Cost            Gains            Losses           Value
<S>                                          <C>             <C>              <C>              <C>
- --------------------------------------------------------------------------------------------------------
SECURITIES AVAILABLE FOR SALE
U.S. Treasury and U.S. Government
  agencies and corporations...........       $303,069         $ 2,162          $  (611)        $304,620
Obligations of states and political
  subdivisions........................         78,783           2,625              (89)          81,319
Corporate and other securities........         27,870             328             (108)          28,090
Mortgage-backed securities............        483,979           3,459           (1,351)         486,087
                                             --------         -------          -------         --------
  Total debt securities available for
     sale.............................        893,701           8,574           (2,159)         900,116
Marketable equity securities..........         56,645           4,440               (2)          61,083
                                             --------         -------          -------         --------
  Total securities available for
     sale.............................       $950,346         $13,014          $(2,161)        $961,199
                                             ========         =======          =======         ========
 
SECURITIES HELD TO MATURITY
U.S. Treasury and U.S. Government
  agencies and corporations...........       $ 61,599         $   209          $   (21)        $ 61,787
Obligations of states and political
  subdivisions........................         22,013             428               --           22,441
Corporate and other securities........          1,496              --              (24)           1,472
Mortgage-backed securities............          2,099             219               --            2,318
                                             --------         -------          -------         --------
  Total securities held to maturity...       $ 87,207         $   856          $   (45)        $ 88,018
                                             ========         =======          =======         ========
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
     Securities held to maturity of approximately $60,500 were transferred from
held to maturity to available for sale upon completion of the mergers of UniBank
and CFC in 1998.
 
     The amortized cost and estimated fair value of debt securities at December
31, 1998, by contractual maturity, are shown below. Expected maturities will
likely differ from contractual maturities because some issuers have the right to
call or prepay obligations with or without call or prepayment penalties.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------
                                                                   Amortized       Estimated
                                                                     Cost          Fair Value
<S>                                                                <C>             <C>
- ---------------------------------------------------------------------------------------------
DEBT SECURITIES AVAILABLE FOR SALE
Due in one year or less.....................................       $ 95,482         $ 96,017
Due after one year through five years.......................        208,420          211,378
Due after five years through ten years......................         38,664           39,497
Due after ten years.........................................         22,738           22,904
Mortgage-backed securities..................................        534,376          537,473
                                                                   --------         --------
  Total debt securities available for sale..................       $899,680         $907,269
                                                                   ========         ========
- ---------------------------------------------------------------------------------------------
</TABLE>
 
     The gross realized gains and losses from the sales of securities are as
follows:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
                                                                    1998         1997         1996
<S>                                                                <C>          <C>          <C>
- ---------------------------------------------------------------------------------------------------
Gross realized gains on sales...............................       $1,217       $  888       $1,806
Gross realized losses on sales..............................           23        1,006          253
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-38
<PAGE>   40
 
NOTE 4.  LOANS AND ALLOWANCE FOR CREDIT LOSSES
 
     The loan portfolio at year-end was as follows:
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------
                                                                 1998          1997
<S>                                                           <C>           <C>
- --------------------------------------------------------------------------------------
Real estate loans:
  Construction..............................................  $  149,795    $  140,656
  Residential mortgage......................................   1,054,290     1,047,112
  Non-residential mortgage..................................     926,191       782,930
Commercial, financial and agricultural......................     808,004       754,392
Installment and credit card loans...........................     409,748       410,170
Other loans.................................................       7,853         9,179
                                                              ----------    ----------
     Total Loans............................................  $3,355,881    $3,144,439
                                                              ==========    ==========
- --------------------------------------------------------------------------------------
</TABLE>
 
     Most of the Company's business activity is with customers located within
the respective local business areas of its subsidiary banks which encompasses
parts of eastern Ohio, western Ohio, southeastern Michigan, western Pennsylvania
and northern West Virginia. The Company's loan portfolio is diversified,
consisting of commercial, residential, agribusiness, consumer and small business
loans. No significant industry concentrations exist, and amounts related to
highly leveraged transactions are not significant. The Company evaluates each
customer's creditworthiness on a case-by-case basis. The amount of collateral
obtained is based on management's evaluation of the customer. Collateral held
relating to commercial, financial, agricultural and commercial mortgages varies
but may include accounts receivable, inventory, property, plant and equipment
and income-producing commercial properties.
 
     In the normal course of business, the Company has made loans to certain
directors, executive officers and their associates under terms consistent with
the Company's general lending policies. Loan activity relating to these
individuals for 1998 is as follows:
 
<TABLE>
<S>                                                           <C>
- ---------------------------------------------------------------------
Aggregate balance -- December 31, 1997......................  $49,430
New loans...................................................   23,740
Repayments..................................................  (15,770)
Other changes...............................................  (17,925)
                                                              -------
Aggregate balance -- December 31, 1998......................  $39,475
                                                              =======
- ---------------------------------------------------------------------
</TABLE>
 
     Other changes represent loans applicable to one reporting period that are
excludable from the other reporting period.
 
     Activity in the allowance for credit losses was as follows:
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------
                                                               1998       1997       1996
<S>                                                           <C>        <C>        <C>
- -------------------------------------------------------------------------------------------
Balance at beginning of year................................  $40,376    $35,401    $33,315
Provision for credit losses.................................   24,968     10,928      7,713
Recoveries..................................................    3,872      2,759      3,495
Loans charged-off...........................................  (15,208)    (8,712)    (9,122)
                                                              -------    -------    -------
Balance at end of year......................................  $54,008    $40,376    $35,401
                                                              =======    =======    =======
- -------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-39
<PAGE>   41
 
NOTE 4.  LOANS AND ALLOWANCE FOR CREDIT LOSSES (CONTINUED)
     Information regarding impaired loans is as follows:
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------
                                                               1998      1997
<S>                                                           <C>       <C>
- ------------------------------------------------------------------------------
Year-end impaired loans with no allowance for credit losses
  allocated.................................................  $  831    $  799
Year-end impaired loans with allowance for credit losses
  allocated.................................................   7,861     7,287
Year-end allowance for credit losses allocated to impaired
  loans.....................................................   3,299     1,530
Average investment in impaired loans during the year........  11,077     9,070
Cash-basis interest income recognized during the year.......     847       248
- ------------------------------------------------------------------------------
</TABLE>
 
NOTE 5.  PREMISES AND EQUIPMENT
 
     Premises and equipment as of year-end are summarized as follows:
 
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------
                                                                     1998           1997
<S>                                                                <C>            <C>
- ------------------------------------------------------------------------------------------
Land, buildings and improvements............................       $ 89,950       $ 95,668
Equipment, furniture and fixtures...........................         77,367         75,809
Construction in process.....................................          3,399          1,670
                                                                   --------       --------
     Total premises and equipment...........................        170,716        173,147
Less accumulated depreciation and amortization..............        (84,750)       (80,465)
                                                                   --------       --------
Premises and equipment, net.................................       $ 85,966       $ 92,682
                                                                   ========       ========
- ------------------------------------------------------------------------------------------
</TABLE>
 
     Included in the above are buildings, land and land improvements which
secure a capitalized lease with a cost of $5,386, less accumulated amortization
and depreciation of $3,810 and $3,549 at December 31, 1998 and 1997.
Substantially all of the property recorded under capital leases relates to
transactions with Bancsites, Inc., a former subsidiary, which the Company
continues to significantly influence through common shareholders and management.
The capital lease premises represent thirteen branch bank facilities owned by
Bancsites and leased to the Company under long-term lease agreements entered
into in the normal course of business and under terms no more favorable than
those prevailing in the marketplace. Lease payments to Bancsites, Inc. under
capital leases amounted to $444 in 1998, $496 in 1997, and $537 in 1996. Rental
payments for land are treated as operating lease expense. Rent expense amounted
to $2,653 in 1998, $2,261 in 1997 and $2,239 in 1996.
 
NOTE 6.  INTEREST-BEARING DEPOSITS
 
     Total interest-bearing deposits as presented on the balance sheet are
comprised of the following classifications at year-end:
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
                                                                      1998             1997
<S>                                                                <C>              <C>
- ----------------------------------------------------------------------------------------------
Interest-bearing demand.....................................       $  336,693       $  432,488
Savings.....................................................        1,011,656          831,433
Time
  In denominations under $100,000...........................        1,541,899        1,560,154
  In denominations of $100,000 or more......................          458,927          424,357
                                                                   ----------       ----------
     Total interest-bearing deposits........................       $3,349,175       $3,248,432
                                                                   ==========       ==========
- ----------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-40
<PAGE>   42
 
NOTE 6.  INTEREST-BEARING DEPOSITS (CONTINUED)
     At December 31, 1998, the scheduled maturities of certificates of deposit
are as follows:
 
<TABLE>
<S>                                                                <C>
- -----------------------------------------------------------------------------
1999........................................................       $1,487,526
2000........................................................          359,392
2001........................................................           95,075
2002........................................................           31,850
2003 and thereafter.........................................           26,983
                                                                   ----------
                                                                   $2,000,826
                                                                   ==========
- -----------------------------------------------------------------------------
</TABLE>
 
NOTE 7.  SECURITIES SOLD UNDER REPURCHASE AGREEMENTS AND FEDERAL FUNDS PURCHASED
 
     The Company has retail repurchase agreements with customers within its
local market areas, as well as federal funds purchased from other banks. These
borrowings are collateralized with securities owned by the banks and held in
their safekeeping accounts at independent correspondent banks. The Company also
has repurchase agreements with brokerage firms which are in possession of the
underlying securities. The exact same securities are returned to the Company at
the maturity of the agreements. The following table summarizes certain
information relative to these borrowings.
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------
                                                                  1998          1997
- ----------------------------------------------------------------------------------------
<S>                                                             <C>         <C>      <C>
Outstanding at year-end.....................................    $207,458    $182,362
Weighted average interest rate at year end..................        4.43%       4.95 %
Maximum amount outstanding as of any month-end..............    $231,453    $268,320
Average amount outstanding..................................     206,234     211,228
Approximate weighted average interest rate during the
  year......................................................        4.64%       4.95 %
- ----------------------------------------------------------------------------------------
</TABLE>
 
NOTE 8.  DEBT AND FEDERAL HOME LOAN BANK ADVANCES
 
     The Company's debt and Federal Home Loan Bank ("FHLB") advances are
comprised of the following at year-end:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------
                                                                1998       1997
<S>                                                           <C>        <C>
- ---------------------------------------------------------------------------------
Short-term borrowings under bank line of credit.............  $ 30,000   $ 15,000
Borrowings under FHLB lines of credit at weighted interest
  rate of 5.30% and 5.98% in 1998 and 1997..................   244,297    238,682
Capital lease obligations...................................     2,184      2,481
Subordinated note 7.08%, due January 2008...................    50,000         --
Obligated mandatorily redeemable capital securities of
  subsidiary trust, interest at 10.20%, due June 2027.......    23,600     27,500
Other items.................................................     7,690      2,032
                                                              --------   --------
     Total..................................................  $357,771   $285,695
                                                              ========   ========
- ---------------------------------------------------------------------------------
</TABLE>
 
                                      S-41
<PAGE>   43
 
NOTE 8.  DEBT AND FEDERAL HOME LOAN BANK ADVANCES (CONTINUED)
     FHLB advances are collateralized by all shares of FHLB stock owned by
subsidiary banks and by 100% of subsidiary banks' qualified mortgage loans.
Based on the carrying amount of FHLB stock owned by subsidiary banks, total FHLB
advances are limited to approximately $482,440, subject to the ability to pledge
qualified residential mortgage loans. At December 31, 1998, required annual
principal payments on FHLB advances were as follows:
 
<TABLE>
<S>                                                           <C>
- ----------------------------------------------------------------------
1999........................................................  $ 47,752
2000........................................................    13,506
2001........................................................    10,523
2002........................................................    18,555
2003 and thereafter.........................................   153,961
                                                              --------
                                                              $244,297
                                                              ========
- ----------------------------------------------------------------------
</TABLE>
 
     On December 31, 1996, the Company entered into a short-term bank line of
credit with a financial institution which enabled the Company to borrow up to
$20,000 through December 31, 1997. The agreement was renewed in December, 1997
and permitted the Company to borrow up to $25,000 through December 31, 1998. In
December, 1998, the agreement was renewed allowing the Company to borrow up to
$30,000 through November 30, 1999. The Company is in the process of
renegotiating the agreement with the financial institution that currently
maintains the line of credit to increase the commitment to $75,000. Interest on
advances taken on the facility is accrued at either the financial institution's
prime rate, a formula based on the London Interbank Offering Rate, or a formula
based on the Federal Funds rate. The Company may elect the interest rate method
to be applied to amounts outstanding in $100 increments. The agreement provides
for an annual fee of .1875% on the average unused portion of the credit
facility. The agreement also contains covenants which require the Company, among
other things, to maintain minimum tangible net worth, as defined, of $305,000,
maintain specified minimum capital ratios, and not permit non-performing assets
to total loans and non-performing assets to total capital ratios to exceed
specified maximums. The average amount outstanding under the agreement was
$7,584 in 1998, with an average interest rate of 5.86%.
 
     During 1997, MACT, in a private placement, issued $27,500 of 10.20% capital
securities through a wholly-owned special purpose subsidiary. The Company's
obligated mandatorily redeemable capital securities may be redeemed by the
Company prior to their mandatory June 1, 2027 redemption date commencing June 1,
2007 at a redemption price of 105.10% of the face value of the capital
securities and thereafter at a premium which declines annually. On or after June
1, 2017, the capital securities may be redeemed at face value. In 1998, the
Company retired securities with a face value of $2,900 at a premium of 15.9%, or
$460. The Company's mandatorily redeemable capital securities are considered to
be Tier I capital.
 
     On January 16, 1998, Mid Am issued $50,000 of 7.08% subordinated debt in a
private placement transaction. The subordinated debt matures in 2008. For
regulatory capital purposes, the subordinated debt is considered Tier II
capital.
 
                                      S-42
<PAGE>   44
 
NOTE 9.  INCOME TAXES
 
     The provision for income taxes consists of the following:
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
                                                                1998       1997       1996
- --------------------------------------------------------------------------------------------
<S>                                                           <C>         <C>        <C>
Current:
  Federal...................................................  $ 21,041    $30,347    $25,769
  State and local...........................................       267        220         --
                                                              --------    -------    -------
                                                                21,308     30,567     25,769
Deferred:
  Federal...................................................   (12,350)    (2,744)    (1,405)
  State and local...........................................      (104)       (73)        --
                                                              --------    -------    -------
                                                               (12,454)    (2,817)    (1,405)
                                                              --------    -------    -------
Total provision for income taxes............................  $  8,854    $27,750    $24,364
                                                              ========    =======    =======
- --------------------------------------------------------------------------------------------
</TABLE>
 
     The sources of gross deferred tax assets and liabilities were as follows at
year end:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------
                                                                1998        1997       1996
- ---------------------------------------------------------------------------------------------
<S>                                                           <C>         <C>         <C>
Items giving rise to deferred tax assets:
  Allowance for loan losses in excess of tax reserve........  $ 15,551    $ 10,154    $ 8,215
  Merger, integration and restructuring expense.............     6,854         176        155
  Deferred compensation.....................................     2,008       1,373      1,064
  Other.....................................................     4,862       3,218      2,271
                                                              --------    --------    -------
                                                                29,275      14,921     11,705
                                                              --------    --------    -------
Items giving rise to deferred tax liabilities:
  Depreciation..............................................    (2,598)     (2,742)    (3,031)
  FHLB stock dividends......................................    (3,089)     (2,394)    (1,809)
  Mortgage servicing rights.................................    (3,452)     (2,288)    (1,486)
  Unrealized gain on securities available for sale..........    (3,312)     (3,773)      (228)
  Other.....................................................    (1,726)     (1,409)    (2,112)
                                                              --------    --------    -------
                                                               (14,177)    (12,606)    (8,666)
                                                              --------    --------    -------
     Net deferred tax asset.................................  $ 15,098    $  2,315    $ 3,039
                                                              ========    ========    =======
- ---------------------------------------------------------------------------------------------
</TABLE>
 
     The Company has sufficient taxes paid in current and prior years to warrant
recording the full deferred tax asset without a valuation allowance.
 
     Total federal income tax expense differs from the expected amounts computed
by applying the statutory federal tax rate of 35% to income before taxes. The
reasons for this difference are as follows:
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                                                              1998               1997               1996
                                                         ---------------    ---------------    --------------
                                                                    Tax                Tax               Tax
                                                         Amount    Rate     Amount    Rate     Amount    Rate
- -------------------------------------------------------------------------------------------------------------
<S>                                                      <C>       <C>      <C>       <C>      <C>       <C>
Income tax expense based upon the federal statutory
  rate on income before income taxes...................  $ 9,331    35.0%   $30,475    35.0%   $27,130   35.0%
Tax exempt income......................................   (3,024)  (11.3)    (3,096)   (3.6)    (3,096)  (4.0)
Non-deductible merger and restructuring costs..........    2,966    11.1         --      --         --     --
Other..................................................     (419)   (1.6)       371     0.5        330    0.4
                                                         -------   -----    -------   -----    -------   ----
                                                         $ 8,854    33.2%   $27,750    31.9%   $24,364   31.4%
                                                         =======   =====    =======   =====    =======   ====
- -------------------------------------------------------------------------------------------------------------
</TABLE>
 
     Tax expense (benefit) attributable to securities gains and losses totaled
$418, ($43) and $544 in 1998, 1997 and 1996.
 
                                      S-43
<PAGE>   45
 
NOTE 10.  EARNINGS PER SHARE
 
     Earnings per share amounts reflect the implementation of SFAS No. 128,
"Earnings per Share." SFAS 128 established new standards for computing and
presenting earnings per share and requires all prior period earnings per share
data be restated to conform with the provisions of the statement. Basic earnings
per share is computed by dividing net income available to common shareholders by
the weighted average number of shares outstanding during the period. Diluted
earnings per share is computed using the weighted average number of shares
determined for the basic computation plus the number of shares of common stock
that would be issued assuming all contingently issuable shares having a dilutive
effect on earnings per share were outstanding for the period.
 
     The weighted average number of common shares outstanding for basic and
diluted earnings per share computations were as follows:
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------
                                                         1998           1997           1996
- -----------------------------------------------------------------------------------------------
<S>                                                   <C>            <C>            <C>
NUMERATOR
  Net income........................................  $    17,808    $    59,320    $    53,150
  Less: Preferred stock dividends...................           --           (605)        (2,407)
                                                      -----------    -----------    -----------
     Net income available to common shareholders
       (basic)......................................       17,808         58,715         50,743
  Effect of dilutive securities:
  Convertible preferred stock.......................           --            605          2,407
                                                      -----------    -----------    -----------
     Net income (diluted)...........................  $    17,808    $    59,320    $    53,150
                                                      ===========    ===========    ===========
DENOMINATOR:
  Weighted-average common shares outstanding
     (basic)........................................   45,124,000     45,402,000     44,510,000
  Exercise of options...............................      562,000        355,000        253,000
  Convertible preferred stock.......................           --        942,000      3,049,000
                                                      -----------    -----------    -----------
  Weighted-average common shares outstanding
     (diluted)......................................   45,686,000     46,699,000     47,812,000
                                                      ===========    ===========    ===========
EARNINGS PER SHARE:
  Basic.............................................  $      0.39    $      1.29    $      1.14
                                                      ===========    ===========    ===========
  Diluted...........................................  $      0.39    $      1.27    $      1.11
                                                      ===========    ===========    ===========
- -----------------------------------------------------------------------------------------------
</TABLE>
 
     The Company's Board of Directors declared a two-for-one stock split payable
June 1, 1998 to shareholders of record May 12, 1998. In addition, the Company
declared 10% stock dividends in each year presented. All share and per share
data have been retroactively adjusted to reflect the mergers discussed in Note
2, stock dividends and splits.
 
                                      S-44
<PAGE>   46
 
NOTE 11.  FAIR VALUES OF FINANCIAL INSTRUMENTS
 
     The following table shows carrying values and the related estimated fair
values of financial instruments at year-end. Items that are not financial
instruments are not included.
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                                                    1998                          1997
                                         --------------------------    --------------------------
                                          Carrying       Estimated      Carrying       Estimated
                                           Amounts      Fair Value       Amounts      Fair Value
- -------------------------------------------------------------------------------------------------
<S>                                      <C>            <C>            <C>            <C>
Cash and due from banks................  $   165,946    $   165,946    $   153,336    $   153,336
Interest-bearing deposits with other
  financial institutions...............        9,851          9,851          7,051          7,051
Federal funds sold.....................       26,024         26,024         39,726         39,726
Securities available for sale..........      996,426        996,426        961,199        961,199
Securities held to maturity............           --             --         87,207         88,018
Loans held for sale and loans, net of
  the allowance for credit losses......    3,379,344      3,410,182      3,123,377      3,115,359
Accrued interest receivable............       29,450         29,450         30,078         30,078
Deposits...............................   (3,832,662)    (3,847,687)    (3,662,941)    (3,685,743)
Securities sold under repurchase
  agreements and federal funds
  purchased............................     (207,458)      (207,458)      (182,362)      (182,362)
Debt and FHLB advances.................     (355,587)      (367,140)      (283,214)      (289,572)
Accrued interest payable...............      (11,747)       (11,747)       (12,105)       (12,105)
- -------------------------------------------------------------------------------------------------
</TABLE>
 
     For purposes of the above disclosures of estimated fair value, the
following assumptions were used: the carrying values for cash and due from
banks, federal funds sold, interest-bearing deposits in other financial
institutions and accrued interest were considered to approximate fair value; the
estimated fair value for securities was based on quoted market values for the
individual securities or for equivalent securities; carrying value is considered
to approximate fair value for loans that contractually reprice at intervals of
less than six months; the estimated fair value for other loans was based on
estimates of the rate the Company would charge for similar loans at December 31,
1998 and 1997, applied over estimated payment periods; the estimated fair value
for demand and savings deposits and securities sold under repurchase agreements
was based on their carrying value; the estimated fair value for certificates of
deposit and borrowings was based on estimates of the rate the Company would pay
on such obligations at December 31, 1998 and 1997, applied for the time period
until maturity. The capital lease obligations of $2,184 and $2,481 at December
31, 1998 and 1997 are not included in the fair value disclosures. The estimated
fair value of commitments was not material.
 
     While these estimates of fair values are based on management's judgment of
appropriate factors, there is no assurance that, if the Company had disposed of
such items at December 31, 1998 or 1997, the estimated fair values would
necessarily have been achieved at that date, since market values may differ
depending on various circumstances. The estimated fair values at December 31,
1998 and 1997 should not necessarily be considered to apply at subsequent dates.
 
     In addition, other assets and liabilities of the Company that are not
defined as financial instruments were not included in the above disclosures,
such as property and equipment. In addition, non-financial instruments typically
not recognized in financial statements (but which may have value) were not
included in the above disclosures. These include, among other items, the
estimated earning power of core deposit accounts, the value of a trained work
force, customer goodwill, and similar items.
 
                                      S-45
<PAGE>   47
 
NOTE 12.  OTHER INCOME AND OTHER EXPENSE
 
     The following is a summary of other income and other expense:
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
                                                                  1998          1997          1996
- ----------------------------------------------------------------------------------------------------
<S>                                                              <C>           <C>           <C>
OTHER INCOME
  International department fees...........................       $   965       $   978       $ 1,011
  Gain on sale of credit card accounts....................            --            --         4,568
  Gain on sale of deposits and branch offices.............            --         8,703            --
  Net gains on sales of other loans.......................           732           976           395
  Other...................................................        16,217        12,980        10,463
                                                                 -------       -------       -------
     Total other income...................................       $17,914       $23,637       $16,437
                                                                 =======       =======       =======
OTHER OPERATING EXPENSE
  Brokerage commissions...................................       $ 6,209       $ 3,597       $ 5,604
  FDIC insurance..........................................           706           714         5,573
  State franchise taxes...................................         4,717         4,547         4,426
  Printing and supplies...................................         3,844         3,853         3,952
  Legal and other professional fees.......................         7,294         5,767         3,908
  Telephone...............................................         4,912         4,367         4,242
  Amortization of intangible assets.......................         2,743         2,957         2,442
  Other...................................................        28,101        26,672        24,654
                                                                 -------       -------       -------
     Total other operating expense........................       $58,526       $52,474       $54,801
                                                                 =======       =======       =======
- --------------------------------------------------------------------------------------
</TABLE>
 
     The FDIC expense for the year ended December 31, 1996 includes $4,230 for a
special Savings Association Insurance Fund (SAIF) assessment on deposits of the
Company's subsidiaries which were acquired from thrifts.
 
NOTE 13.  MERGER, INTEGRATION AND RESTRUCTURING EXPENSES
 
     In 1998, the Company recorded charges totaling $54,487 ($38,382 after tax,
or $.84 per diluted share.) The majority of the charges are associated with the
merger and integration of the combined operations of Citizens Bancshares, Inc.,
Mid Am, Inc. and The Ohio Bank. Included in the total are severance and other
employee-related costs of $18,250, valuation adjustments of property, equipment
and other assets of $15,933, transaction costs of $8,311 and other merger and
integration related costs of $11,994.
 
     Severance and other employee-related charges were incurred as part of the
consolidation of ten separate banking organizations into three
geographically-based banking entities and the resultant reduction of duplicate
positions and as part of a process redesign applied to all business segments
throughout the organization. The employee related costs resulted from the
elimination of approximately 260 positions, including 26 senior management and
officer positions. Prior to December 31, 1998, approximately 40% of
employee-related expenses were paid. The remaining expenses are expected to be
paid and the remaining position reductions completed during the first and second
quarters of 1999.
 
     Asset valuation adjustments were comprised of charges to reflect at fair
value redundant premises and equipment to be disposed of and related intangible
assets; to reflect the impairment of premises for which there has been a
significant change in the extent or manner of use; and to reflect the impairment
of intangible assets. Fair values for significant assets were determined by
professional appraisal. Premises and equipment to be disposed of had a carrying
value of $1,902 at year-end 1998, after valuation adjustments of $1,980. These
dispositions, substantially all of which are in the community banking segment,
are expected to be accomplished during 1999. The assets associated with the
remaining valuation adjustments were primarily in the community banking
subsidiaries. The
                                      S-46
<PAGE>   48
 
NOTE 13.  MERGER, INTEGRATION AND RESTRUCTURING EXPENSES (CONTINUED)
charges for these valuation allowances are aggregated with other merger,
integration and restructuring expenses and are reflected in the parent and other
segment for line of business reporting purposes (See Note 20) as part of the
Company-wide reorganization.
 
     Charges of $1,603 in 1997 related to branch and other acquisitions and $838
in 1996 related to a community bank acquisition.
 
NOTE 14.  EMPLOYEE BENEFITS
 
     The Company maintains two plans which management intends to be the
Company's primary ongoing retirement plans, as well as a supplemental retirement
plan for certain individuals. In 1998, 1997 and 1996, employees of the former
Mid Am, Inc. and its affiliates were eligible to participate in these plans.
Beginning in 1999, all employees of the Company will be eligible to participate.
 
     Employee Stock Ownership and Savings Plan: The plan provides for annual
contributions by the Company based upon its income (as defined by the plan)
after providing for a specified return on shareholders' equity. Under the 401(k)
portion of the Plan, employees may contribute a percentage of their eligible
compensation with a Company match of such contributions up to a maximum match of
three percent. Employees may contribute to this plan upon employment. Employer
matching provisions commence after the employees have completed twelve months of
service. At year end 1998, the plan held 1,094,848 shares of Company stock.
 
     Employee Stock Ownership Pension Plan: Under this plan, the Company also
sponsors an Employee Stock Ownership Pension Plan which provides for an annual
employer contribution equal to 6% of eligible employees' annual compensation. At
year end 1998, the plan held 637,501 shares of Company stock.
 
     Supplemental Retirement Plan: This plan replaces retirement benefits
eliminated under the Company's qualified retirement plans because of eligible
compensation limitations under current tax law. The Company contributes
authorized shares of its common stock to a trust established to hold the shares
on behalf of participating employees. The Company's contribution under the plan
is determined by multiplying the excess of employees' compensation over the
established limitation by the contribution level established by the Board of
Directors for the Company's qualified plans (12% in each year presented). The
funding of shares typically occurs in January of the succeeding year.
 
     Expense relating to these plans totaled $4,726, $3,593 and $2,762 in 1998,
1997 and 1996.
 
     Pension Plans: Citizens and Century maintained defined benefit pension
plans covering certain employees. Retirement benefits are based primarily on
years of service and compensation rates near retirement. Employees became
eligible to participate in the plans after meeting certain service requirements
and became fully vested in the benefits after five years of service. Citizens'
funding policy was to contribute the maximum amount deductible for federal
income tax purposes. Citizens' board of directors froze all future benefits
effective December 31, 1998. The benefit obligation, pension expense and accrued
pension liability and are not material in any period presented.
 
     A summary of the other retirement plans of merged affiliates follows.
Management intends to either terminate these plans, merge them into an ongoing
plan or otherwise eliminate the plans.
 
     Profit Sharing and 401(k) Plans: Citizens, Ohio Bank, UniBank and CFC
maintained defined contribution profit sharing plans in which substantially all
employees, other than employees of Freedom Express, Inc., participated. Amounts
contributed to the plan were determined annually by the Board of Directors. In
addition, Ohio Bank's plan allowed employee contributions, 50% of which were
matched by the Bank up to a maximum of 6% of the participant's compensation.
Expense under the plans totaled $1,776, $2,421 and $2,172 in 1998, 1997 and
1996.
 
                                      S-47
<PAGE>   49
 
NOTE 14.  EMPLOYEE BENEFITS (CONTINUED)
     Postretirement Health Insurance Benefits: Citizens continues to pay health
insurance premiums for certain employees after retirement. Citizens accrued the
cost of retirees' health and other postretirement benefits during the working
career of active employees. The expense and liability under this plan are not
material in any period presented.
 
     Employee Stock Ownership Plan: Citizens maintained an Employee Stock
Ownership Plan (ESOP) for substantially all employees. Corporate contributions
to the plan were discretionary and determined annually by the Board of
Directors. Acquisitions of common shares by the ESOP were funded through
borrowings with unrelated financial institutions with the common shares
purchased serving as collateral for the related loans. Loans outstanding,
totaling $325, were repaid in 1998 in conjunction with the merger to form Sky.
The plan held a total of 107,294 shares at year-end 1998 and 1997, all of which
were allocated or committed to be released at year-end 1998. Expenses associated
with the ESOP were not material.
 
NOTE 15.  STOCK OPTIONS
 
     Options to buy stock have been granted to directors, officers and employees
under various stock option plans. The Sky Financial Group, Inc. 1998 Stock
Option Plan for Employees and the Sky Financial Group, Inc. Amended and Restated
Stock Option Plan for Nonemployee Directors were approved by the Company's
shareholders in 1998. Under these plans, options may be granted to buy a maximum
of 2.9 million common shares, or 7.5% of the Company's issued and outstanding
common shares at the time of its merger with Mid Am. Options expire 10 years
after the date of grant and are issued at an option price no less than the
market price of the Company's stock on the date of grant. Certain individuals,
including directors, may also elect to receive options, determined under a
formula, in lieu of a portion of their salary or director fees, as applicable.
Vesting of options granted to directors is determined at the time of grant.
Options granted to officers and other key employees are generally exercisable at
40% after two years and in annual 20% increments thereafter, except for options
received in lieu of salary, which are immediately exercisable.
 
     The Company's stock option plan in place prior to its merger with Mid Am,
as well as plans of Mid Am and Century, were frozen in 1998 and no further
options may be granted under these plans. Vesting of options granted under these
plans was determined at the time of grant, generally 3 to 5 years after the
grant date.
 
     A summary of the activity in the plans is as follows.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
                                           1998                   1997                   1996
                                   --------------------   --------------------   --------------------
                                               Weighted               Weighted               Weighted
                                               Average                Average                Average
                                               Exercise               Exercise               Exercise
                                    Shares      Price      Shares      Price      Shares      Price
<S>                                <C>         <C>        <C>         <C>        <C>         <C>
- -----------------------------------------------------------------------------------------------------
Outstanding at beginning of
  year...........................  1,869,344    $15.06    1,586,489    $12.85    1,432,573    $12.28
Granted..........................  1,305,804     28.06      477,396     20.85      212,620     16.20
Exercised........................   (186,054)    12.40     (174,611)    10.68      (38,170)    11.00
Forfeited........................    (43,911)    21.30      (19,930)    15.20      (20,534)    13.03
                                   ---------    ------    ---------    ------    ---------    ------
Outstanding at end of year.......  2,945,183    $20.95    1,869,344    $15.06    1,586,489    $12.85
                                   =========    ======    =========    ======    =========    ======
Options exercisable at
  year-end.......................  1,832,482    $17.45    1,230,858    $13.40    1,144,947    $11.89
Weighted average fair value of
  options granted during year....               $ 5.94                 $ 3.06                 $ 2.60
- -----------------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-48
<PAGE>   50
 
NOTE 15.  STOCK OPTIONS (CONTINUED)
     Options outstanding at year-end 1998 were as follows.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------
                                                       Outstanding                Exercisable
                                               ----------------------------   --------------------
                                                           Weighted Average               Weighted
                  Range of                                    Remaining                   Average
                  Exercise                                   Contractual                  Exercise
                   Prices                       Number      Life (Months)      Number      Price
<S>                                            <C>         <C>                <C>         <C>
- --------------------------------------------------------------------------------------------------
$ 5 to $10...................................    164,415          56            164,394    $ 9.18
$10 to $15...................................    726,206          71            690,811     12.34
$15 to $20...................................    518,969          89            422,602     17.13
$20 to $25...................................    235,683         105             80,320     24.79
$25 to $30...................................  1,196,391         117            392,401     25.88
$30 to $35...................................    103,519         113             81,954     31.16
                                               ---------                      ---------
Outstanding at year-end......................  2,945,183          96          1,832,482     17.45
                                               =========                      =========
- --------------------------------------------------------------------------------------------------
</TABLE>
 
     Had compensation cost for stock options been measured using FASB Statement
No. 123, net income and earnings per share would have been the pro forma amounts
indicated below. The pro forma effect may increase in the future if more options
are granted.
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------
                                                                  1998          1997          1996
<S>                                                              <C>           <C>           <C>
- ----------------------------------------------------------------------------------------------------
Net income as reported....................................       $17,808       $59,320       $53,150
Pro forma net income......................................        15,718        57,384        52,724
Basic earnings per share as reported......................          0.39          1.29          1.14
Pro forma basic earnings per share........................          0.35          1.25          1.13
Diluted earnings per share as reported....................          0.39          1.27          1.11
Pro forma diluted earnings per share......................          0.34          1.23          1.10
- ----------------------------------------------------------------------------------------------------
</TABLE>
 
     The pro forma effects are computed using option-pricing models, using the
following weighted average assumptions as of the grant date:
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------
                                                              1998    1997      1996
<S>                                                           <C>     <C>     <C>  <C>
- --------------------------------------------------------------------------------------
Risk-free interest rate.....................................  4.81%   6.16%   6.06 %
Expected option life (years)................................  7.00    6.89    7.25
Expected stock price volatility.............................  0.20    0.17    0.21
Dividend yield..............................................  3.24%   3.03%   3.74 %
- --------------------------------------------------------------------------------------
</TABLE>
 
     The Company maintains a stock appreciation rights (SAR) plan under which
SARs were granted in tandem with stock options until 1998. Expense related to
the SARs was $213 in 1998, $1,793 in 1997 and $222 in 1996. A summary of the
activity in this plan follows:
 
<TABLE>
<CAPTION>
                                    1998                   1997                   1996
                             -------------------    -------------------    -------------------
                                        Weighted               Weighted               Weighted
                                        Average                Average                Average
                                        Exercise               Exercise               Exercise
                              SARs       Price       SARs       Price       SARs       Price
<S>                          <C>        <C>         <C>        <C>         <C>        <C>
- ----------------------------------------------------------------------------------------------
Outstanding at beginning of
  year.....................   44,123     $11.72     118,358     $10.61     111,334     $10.45
Granted....................    4,774      32.73       9,172      14.77       7,130      13.18
Exercised..................  (25,035)     10.49     (82,500)     10.45          --         --
Forfeited..................     (438)     18.08        (907)     13.37        (106)     13.18
                             -------     ------     -------     ------     -------     ------
Outstanding at end of
  year.....................   23,424     $17.21      44,123     $11.72     118,358     $10.61
                             =======     ======     =======     ======     =======     ======
- ----------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-49
<PAGE>   51
 
NOTE 16.  CONTINGENCIES
 
     The Company is involved in lawsuits and claims, which arise in the normal
course of business. In the opinion of management, any liabilities that may
result from these lawsuits and claims will not materially affect the financial
position or results of operations of the Company.
 
NOTE 17.  FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK
 
     The Company is a party to financial instruments with off-balance-sheet risk
in the normal course of business to meet the financing needs of its customers
located primarily within the local business area. These instruments include
commitments to extend credit, standby letters of credit and international
commercial letters of credit. In addition, MACC retains a portion of the credit
risk on loans and leases it sells in the secondary market.
 
     The Company's exposure to credit loss in the event of non-performance by
the other party to the financial instrument for commitments to extend credit,
standby letters of credit and letters of credit is represented by the
contractual amount of those instruments. The Company uses the same credit
policies in making commitments and conditional obligations as it does for
on-balance-sheet instruments.
 
     Financial instruments whose contract amounts represent credit risk at
December 31 are presented below:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------
                                                                1998       1997
<S>                                                           <C>        <C>
- ---------------------------------------------------------------------------------
Commitments to extend credit................................  $620,466   $716,531
Standby letters of credit...................................    64,959     63,084
Letters of credit...........................................       692      1,734
- ---------------------------------------------------------------------------------
</TABLE>
 
     Commitments to extend credit are agreements to lend to a customer as long
as there is no violation of any condition established in the contract.
Commitments generally have fixed expiration dates ranging from one to five
years, variable interest rates tied to the prime rate and Treasury bill rates
and may require payment of a fee. Since many of the commitments are expected to
expire without being drawn upon, the total commitment amounts do not necessarily
represent future cash requirements.
 
     Standby letters of credit are conditional commitments issued by the Company
to guarantee the performance of a customer to a third party. Those guarantees
are primarily issued to support public and private borrowing arrangements,
including bond financing and similar transactions. The expiration date of
substantially all standby letters of credit extend for a period ranging from
thirty days to seven years. The credit risk involved in issuing letters of
credit is essentially the same as that involved in extending loan facilities to
customers. The Company holds marketable securities, certificates of deposits,
real estate, inventory and equipment as collateral supporting those commitments
for which collateral is deemed necessary.
 
     Letters of credit are instruments used to facilitate trade, most commonly
international trade, by substituting the Company's credit for that of a
commercial importing company. The terms are generally one to three months. The
letters of credit are primarily unsecured.
 
     Most of the Company's business activity is with customers located within
the respective local business areas of its bank subsidiaries. However, MACC's
loan and lease activities are with customers in medical and dental related
fields located throughout the continental United States. Substantially all loans
and leases originated by MACC are sold in the secondary market. In connection
with sales of the loans and leases, MACC retains limited servicing and limited
recourse liability. The servicing is limited to responsibility to collect
delinquent accounts based on information provided by the purchaser of the loans
and leases. A liability is established at the time each loan or lease is sold
based on the fair value of the servicing liability. In addition, MACC records a
liability for the estimated recourse for credit losses which is limited to an
aggregate of 10% of the purchase price of the loans and leases sold. The
 
                                      S-50
<PAGE>   52
 
NOTE 17.  FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK (CONTINUED)
fair value of the servicing liability and the estimated recourse liability
reduce the amount of gain or increase the loss of the loans and leases sold. At
December 31, 1998, the outstanding balance of loans and leases sold was
$305,667. A portion of the purchase price is deferred and paid to MACC on a
delayed basis. At December 31, 1998 and 1997, MACC recorded receivables of
$9,191 and $4,339, respectively, for deferred sales proceeds. Changes in the
liability for recourse provisions relating to sold loans and leases is as
follows:
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------
                                                               1998       1997
<S>                                                           <C>        <C>
- -------------------------------------------------------------------------------
Balance at beginning of year................................  $ 3,050    $  618
Additions (reductions):
  Provision for recourse liability..........................    5,592     2,924
  Recourse claims paid......................................   (2,578)     (696)
  Recoveries of claims paid.................................      169       204
                                                              -------    ------
Balance at end of year......................................  $ 6,233    $3,050
                                                              =======    ======
- -------------------------------------------------------------------------------
</TABLE>
 
NOTE 18.  MORTGAGE BANKING ACTIVITIES
 
     The Company conducts mortgage banking operations through its banking
subsidiaries. The primary activity relates to the origination and sale of fixed
and variable rate residential mortgages in the secondary market. The Company
usually retains the servicing of the loans it sells. Loans are primarily
originated in the western Ohio, eastern Ohio, western Pennsylvania and
southeastern Michigan market areas; however, the Company also has employees and
agents in Kentucky, Indiana, and Colorado who also originate loans for sale in
the secondary market.
 
     The following table summarizes information relating to the Company's
mortgage banking activity as of December 31:
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
                                                                      1998             1997
<S>                                                                <C>              <C>
- ----------------------------------------------------------------------------------------------
Amounts held in agency accounts.............................       $   13,417       $   11,814
Amounts held in escrow accounts.............................            9,084            9,120
Mortgage banking receivables for advanced funds.............            3,000              488
Unpaid mortgage loan principal for loans serviced for
  investors.................................................        1,942,931        1,624,694
Mortgage servicing rights, net of accumulated
  amortization..............................................           10,773            6,173
Allowance for impairment of capitalized mortgage servicing
  rights....................................................              904              341
- ----------------------------------------------------------------------------------------------
</TABLE>
 
     In 1998, 1997 and 1996, the Company sold certain servicing rights on
mortgages which had an outstanding principal balance of $68,980, $96,691 and
$41,038, respectively, and realized gains of $64, $446 and $351, respectively.
At December 31, 1998 the Company had firm commitments for the sale of
approximately $77,220 of loans held for sale. No provision for loss on the
carrying amount on loans held for sale is considered necessary at December 31,
1998.
 
NOTE 19.  REGULATORY MATTERS
 
     Capital Maintenance Requirements
 
     The Company and its bank subsidiaries must observe capital guidelines
established by Federal and state regulatory authorities. Failure to meet
specified minimum capital requirements can result in certain mandatory actions
by the Company's and banks' primary regulators that could have a material effect
on the Company's financial condition or results of operations. Under capital
adequacy guidelines, the Company and its bank subsidiaries must meet specific
quantitative measures of their assets, liabilities and certain off balance sheet
items as determined under regulatory accounting practices. The Company's and
banks' capital amounts and classification are also subject to qualitative
 
                                      S-51
<PAGE>   53
 
NOTE 19.  REGULATORY MATTERS (CONTINUED)
judgments by the regulators about components, risk weightings and other factors.
Management believes, as of December 31, 1998, that the Company and its banks
meet all capital adequacy requirements to which they are subject.
 
     As of December 31, 1998, the Company and its banks have been notified by
their respective regulators that, based on the most recent regulatory
examinations, each is regarded as well capitalized under the regulatory
framework for prompt corrective action. Such determinations have been made
evaluating the Company and its banks under Tier I, total capital, and leverage
ratios. There are no conditions or events since these notifications that
management believes have changed any of the Company's or banks' well capitalized
categorizations.
 
     The Company's and its significant banks' capital ratios are presented in
the following table:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------
                                                                      Minimum               Required to be
                                                                   Required for            Well Capitalized
                                                                      Capital                Under Prompt
                                                                     Adequacy              Corrective Action
                                               Actual                Purposes                 Regulations
                                          -----------------      -----------------      -----------------------
          December 31, 1998                Amount     Ratio       Amount     Ratio       Amount        Ratio
<S>                                       <C>         <C>        <C>         <C>        <C>         <C>    
- ---------------------------------------------------------------------------------------------------------------
Total capital to risk-weighted assets
  Company.............................    $450,025    11.6%      $311,490     8.0%      $389,363    10.0%
  Mid Am Bank.........................      90,859    10.2         71,337     8.0         89,172    10.0
  Citizens............................     123,750    10.5         94,432     8.0        118,040    10.0
  Ohio Bank...........................      94,917    10.5         72,161     8.0         90,201    10.0
  First National......................      43,975    10.2         34,523     8.0         43,154    10.0
Tier 1 capital to risk-weighted assets
  Company.............................    $345,122     8.9%      $155,745     4.0%      $233,618     6.0%
  Mid Am Bank.........................      69,713     7.8         35,669     4.0         53,503     6.0
  Citizens............................      98,995     8.4         47,216     4.0         70,824     6.0
  Ohio Bank...........................      73,642     8.2         36,081     4.0         54,121     6.0
  First National......................      32,581     7.5         17,262     4.0         25,892     6.0
Tier 1 capital to average assets
  Company.............................    $345,122     7.2%      $191,927     4.0%      $239,909     5.0%
  Mid Am Bank.........................      69,713     6.9         40,351     4.0         50,438     5.0
  Citizens............................      98,995     5.5         72,128     4.0         90,160     5.0
  Ohio Bank...........................      73,642     6.0         49,234     4.0         61,543     5.0
  First National......................      32,581     6.0         21,750     4.0         27,187     5.0
- ---------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-52
<PAGE>   54
 
NOTE 19.  REGULATORY MATTERS (CONTINUED)
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------
                                                                      Minimum            Required to be
                                                                   Required for         Well Capitalized
                                                                      Capital             Under Prompt
                                                                     Adequacy           Corrective Action
                                               Actual                Purposes              Regulations
                                          -----------------      -----------------      -----------------
          December 31, 1997                Amount     Ratio       Amount     Ratio       Amount        Ratio
<S>                                       <C>         <C>        <C>         <C>        <C>         <C>     
- ---------------------------------------------------------------------------------------------------------------
Total capital to risk-weighted assets
  Company.............................    $428,320    12.4%      $275,380     8.0%      $344,225    10.0%
  Mid Am Bank.........................      80,841    10.6         60,832     8.0         76,041    10.0
  Citizens............................      67,512    10.9         49,647     8.0         62,059    10.0
  Ohio Bank...........................      50,066    11.8         33,853     8.0         42,316    10.0
  First National......................      44,269    11.0         32,271     8.0         40,338    10.0
Tier 1 capital to risk-weighted assets
  Company.............................    $389,190    11.3%      $137,690     4.0%      $206,535     6.0%
  Mid Am Bank.........................      72,738     9.6         30,416     4.0         45,624     6.0
  Citizens............................      59,701     9.6         24,824     4.0         37,236     6.0
  Ohio Bank...........................      45,591    10.8         16,926     4.0         25,390     6.0
  First National......................      41,308    10.2         16,135     4.0         24,203     6.0
Tier 1 capital to average assets
  Company.............................    $389,190     8.8%      $177,653     4.0%      $222,066     5.0%
  Mid Am Bank.........................      72,738     8.0         36,259     4.0         45,324     5.0
  Citizens............................      59,701     5.9         40,613     4.0         50,766     5.0
  Ohio Bank...........................      45,591     8.1         22,419     4.0         28,024     5.0
  First National......................      41,308     7.7         21,437     4.0         26,796     5.0
- ---------------------------------------------------------------------------------------------------------------
</TABLE>
 
     Restrictions on Subsidiary Dividends
 
     Dividends paid by the Company are mainly provided by dividends from its
subsidiaries. However, certain restrictions exist regarding the ability of its
banking subsidiaries to transfer funds to the Company in the form of cash
dividends, loans or advances. Regulatory approval is required in order to pay
dividends in excess of the bank subsidiaries' earnings retained for the current
year plus retained net profits since January 1, 1996. As of December 31, 1998,
$15,586 was available for distribution to the Company as dividends without prior
regulatory approval.
 
NOTE 20.  LINE OF BUSINESS REPORTING
 
     The Company manages and operates two major lines of business: Community
Banking and Financial Service Affiliates. Community Banking includes lending and
related services to businesses and consumers, mortgage banking,
deposit-gathering and institutional trust services. Financial Service Affiliates
consist of non-banking companies engaged in commercial finance lending and
leasing, broker/dealer operations, non-conforming mortgage lending, collection
activities, wealth management and other financial related services. The business
lines are identified by the entities through which the product or service is
delivered.
 
     The reported line of business results reflect the underlying core operating
performance within the business units. Parent and Other is comprised of the
parent company and several smaller business units. It includes the net funding
cost of the parent company and intercompany eliminations. Expenses for centrally
provided services and support are fully allocated based principally upon
estimated usage of services. All significant non-recurring items of income and
expense company-wide are included in
 
                                      S-53
<PAGE>   55
 
NOTE 20.  LINE OF BUSINESS REPORTING (CONTINUED)
Parent and Other. Substantially all of the Company's assets are part of the
Community Banking line of business. Prior periods have been presented to conform
with current reporting methodologies. Selected segment information is included
in the following table.
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                           Financial
                                           Community        Service          Parent         Consolidated
                                            Banking        Affiliates       and Other          Total
<S>                                        <C>             <C>              <C>             <C>
- --------------------------------------------------------------------------------------------------------
1998
Net interest income.................       $190,212         $ 1,271         $ (4,359)         $187,124
Provision for loan losses...........          8,833             152           15,983            24,968
                                           --------         -------         --------          --------
Net interest income after
  provision.........................        181,379           1,119          (20,342)          162,156
Non-interest income.................         56,656          40,275              283            97,214
Non-interest expense................        140,049          39,719           52,940           232,708
                                           --------         -------         --------          --------
Income (loss) before income taxes...         97,986           1,675          (72,999)           26,662
Income tax expense (benefit)........         30,777             697          (22,620)            8,854
                                           --------         -------         --------          --------
Net income (loss)...................       $ 67,209         $   978         $(50,379)         $ 17,808
                                           ========         =======         ========          ========
1997
Net interest income.................       $180,582         $   812         $   (780)         $180,614
Provision for loan losses...........          8,290              38            2,600            10,928
                                           --------         -------         --------          --------
Net interest income after
  provision.........................        172,292             774           (3,380)          169,686
Non-interest income.................         47,129          27,887            7,151            82,167
Non-interest expense................        135,186          27,718            1,879           164,783
                                           --------         -------         --------          --------
Income (loss) before income taxes...         84,235             943            1,892            87,070
Income tax expense (benefit)........         26,545             534              671            27,750
                                           --------         -------         --------          --------
Net income (loss)...................       $ 57,690         $   409         $  1,221          $ 59,320
                                           ========         =======         ========          ========
1996
Net interest income.................       $170,787         $   175         $  1,152          $172,114
Provision for loan losses...........          7,713              --               --             7,713
                                           --------         -------         --------          --------
Net interest income after
  provision.........................        163,074             175            1,152           164,401
Non-interest income.................         41,107          16,846            4,291            62,244
Non-interest expense................        126,885          17,499            4,747           149,131
                                           --------         -------         --------          --------
Income (loss) before income taxes...         77,296            (478)             696            77,514
Income tax expense (benefit)........         24,173            (127)             318            24,364
                                           --------         -------         --------          --------
Net income (loss)...................       $ 53,123         $  (351)        $    378          $ 53,150
                                           ========         =======         ========          ========
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-54
<PAGE>   56
 
NOTE 21.  CONDENSED PARENT COMPANY FINANCIAL INFORMATION
 
CONDENSED PARENT COMPANY BALANCE SHEETS
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------
                                                                1998        1997
- ----------------------------------------------------------------------------------
<S>                                                           <C>         <C>
ASSETS
  Cash and due from banks...................................  $  2,374    $  9,598
  Securities available for sale.............................    28,954      12,931
  Investment in bank subsidiaries...........................   307,527     353,653
  Investment in nonbank subsidiaries........................    29,522      26,763
  Receivable from subsidiaries..............................    73,334      22,800
  Bank premises and equipment...............................     8,442       8,729
  Other assets..............................................    27,954       4,247
                                                              --------    --------
     Total assets...........................................  $478,107    $438,721
                                                              ========    ========
LIABILITIES
  Debt......................................................  $111,851    $ 43,351
  Other liabilities.........................................    22,414       8,092
                                                              --------    --------
     Total liabilities......................................   134,265      51,443
SHAREHOLDERS' EQUITY........................................   343,842     387,278
                                                              --------    --------
     Total liabilities and shareholders' equity.............  $478,107    $438,721
                                                              ========    ========
- ----------------------------------------------------------------------------------
</TABLE>
 
CONDENSED PARENT COMPANY STATEMENTS OF INCOME
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
                                                                1998       1997       1996
- --------------------------------------------------------------------------------------------
<S>                                                           <C>         <C>        <C>
INCOME
  Dividends from bank subsidiaries..........................  $ 85,506    $56,374    $37,264
  Dividends from nonbank subsidiaries.......................     3,150      2,685         --
  Management fees...........................................     9,392      8,782      7,190
  Other interest and dividend income........................     2,233      1,182        613
                                                              --------    -------    -------
     Total income...........................................   100,281     69,023     45,067
                                                              --------    -------    -------
EXPENSES
  Interest expense..........................................     6,979      2,419         14
  Salaries and employee benefits............................     8,773      9,190      6,226
  Net occupancy expense.....................................     1,260      1,009        683
  Merger, integration and restructuring expense.............    20,063         --         --
  Other expense.............................................     4,522      4,024      3,588
                                                              --------    -------    -------
     Total expenses.........................................    41,597     16,642     10,511
                                                              --------    -------    -------
Income Before Income Taxes and Equity in Undistributed Net
  Income of Subsidiaries....................................    58,684     52,381     34,556
Income Tax Benefit..........................................     8,567      2,384        826
                                                              --------    -------    -------
Income Before Equity in Undistributed Net Income of
  Subsidiaries..............................................    67,251     54,765     35,382
Equity in Undistributed Net Income of Bank Subsidiaries.....   (47,154)     5,631     17,141
Equity in Undistributed Net Income of Nonbank
  Subsidiaries..............................................    (2,289)    (1,076)       627
                                                              --------    -------    -------
Net Income..................................................  $ 17,808    $59,320    $53,150
                                                              ========    =======    =======
Net Income Available to Common Shareholders.................  $ 17,808    $58,715    $50,743
                                                              ========    =======    =======
- --------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-55
<PAGE>   57
 
NOTE 21.  CONDENSED PARENT COMPANY FINANCIAL INFORMATION (CONTINUED)
CONDENSED PARENT COMPANY STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
                                                                1998        1997        1996
- ----------------------------------------------------------------------------------------------
<S>                                                           <C>         <C>         <C>
OPERATING ACTIVITIES
  Net income................................................  $ 17,808    $ 59,320    $ 53,150
  Adjustments to reconcile net income to net cash provided
     by operating activities:
     Equity in undistributed net income of bank
       subsidiaries.........................................    47,154      (5,631)    (17,141)
     Equity in undistributed net income of nonbank
       subsidiaries.........................................     2,289       1,076        (627)
     Depreciation and amortization..........................       845         486         269
     (Gain) loss on sale of assets..........................       (99)         --          --
     Change in other assets and liabilities.................   (47,768)      2,426        (410)
                                                              --------    --------    --------
       Net cash from operating activities...................    20,229      57,677      35,241
                                                              --------    --------    --------
INVESTING ACTIVITIES
  Capital contributions to bank subsidiaries................      (800)     (2,100)         --
  Capital contributions to nonbank subsidiaries.............    (4,300)     (9,503)     (1,707)
  Loan to subsidiary........................................   (11,700)    (12,800)    (10,000)
  Net loan payments.........................................     9,406           7         282
  Proceeds from sale of securities available for sale.......     7,255          --          34
  Purchases of securities available for sale................   (26,048)     (6,576)       (851)
  Proceeds from maturities of securities held to maturity...     1,190       1,531       1,355
  Purchase of securities held to maturity...................    (1,210)     (1,541)     (1,493)
  Purchases of life insurance contracts.....................   (18,350)         --          --
  Proceeds from sales of premises and equipment.............         4          39          30
  Purchases of bank premises and equipment..................      (516)     (5,851)     (2,581)
                                                              --------    --------    --------
       Net cash from investing activities...................   (45,069)    (36,794)    (14,931)
                                                              --------    --------    --------
FINANCING ACTIVITIES
  Proceeds from issuance of debt............................    90,000      62,851          --
  Repayment of debt.........................................   (21,500)    (19,500)         --
  Preferred stock retired...................................        --     (21,801)         --
  Pre-merger acquisition of pooled affiliate common stock...        --          --      (1,127)
  Proceeds from issuance of common stock....................     2,363       1,368         412
  Cash dividends and fractional shares paid.................   (21,471)    (25,249)    (23,404)
  Treasury stock purchases..................................   (32,067)    (10,217)    (11,020)
  Other items...............................................       291      (1,115)         79
                                                              --------    --------    --------
       Net cash from financing activities...................    17,616     (13,663)    (35,060)
                                                              --------    --------    --------
Net Change in Cash and Due From Banks.......................    (7,224)      7,220     (14,750)
Cash and Due From Banks at Beginning of Year................     9,598       2,378      17,128
                                                              --------    --------    --------
Cash and Due From Banks at End of Year......................  $  2,374    $  9,598    $  2,378
                                                              ========    ========    ========
- ----------------------------------------------------------------------------------------------
</TABLE>
 
                                      S-56

<PAGE>   1
                                                                    EXHIBIT 21.1



SUBSIDIARIES OF THE COMPANY



Sky Financial Group, Inc.
Bowling Green, Ohio


  A.  Bank Subsidiaries


      1.  Mid American National Bank and Trust Company *
          Toledo, Ohio
          Sky Financial Group, Inc. owns 100 percent

          a.  Mid Am NB5, Inc.
              Bowling Green, Ohio
              Mid American National Bank owns 100 percent

              1.  NB5 Financial Services
                  Dublin, Ohio
                  Mid Am NB5, Inc. owns 20 percent


      2.  First National Bank Northwest Ohio * 
          Bryan, Ohio 
          Sky Financial Group, Inc. owns 100 percent

          a.  Defiance Financial Corp.
              Defiance, Ohio
              First National Bank owns 100 percent

              1.  HS and L Financial Agency, Inc.
                  Defiance, Ohio
                  Defiance Financial Corp. owns 100 percent

          b.  MFI Holding Company
              Bryan, Ohio
              First National Bank owns 100 percent

              1.  MFI Insurance Agency, Inc.
                  Archbold, Ohio
                  MFI Holding Company owns 100 percent


      3.  Adrian State Bank *
          Adrian, Michigan
          Sky Financial Group, Inc. owns 100 percent

          a.  Mid Am Title Insurance Agency, Inc.
              Adrian, Michigan
              Adrian State Bank owns 100 percent




<PAGE>   2



      Bank Subsidiaries (continued)


      4.  The Citizens Banking Company
          Salineville, Ohio
          Sky Financial Group, Inc. owns 100 percent

          a.  ValueNet, Inc.
              Salineville, Ohio
              The Citizens Banking Company owns 100 percent


      5.  The Ohio Bank
          Findlay, Ohio
          Sky Financial Group, Inc. owns 100 percent



  B.  Financial Services Subsidiaries


      1.  Mid Am of Michigan
          Grand Rapids, Michigan
          Sky Financial Group, Inc. owns 100 percent


      2.  Sky Investments, Inc.
          Bryan, Ohio
          Sky Financial Group, Inc. owns 100 percent


      3.  Sky Technology Resources, Inc.
          Bowling Green, Ohio
          Sky Financial Group, Inc. owns 100 percent


      4.  Sky Asset Management Services, Inc.
          Clearwater, Florida
          Sky Financial Group, Inc. owns 100 percent


      5.  Mid Am Credit Corp.
          Columbus, Ohio
          Sky Financial Group, Inc. owns 100 percent


      6.  Mid Am Private Trust, National Association
          Cleveland, Ohio
          Sky Financial Group, Inc. owns 100 percent


      7.  Mid Am Capital Trust I
          Wilmington, Delaware
          Sky Financial Group, Inc. owns 100 percent




<PAGE>   3



      Financial Services Subsidiaries (continued)


      8.  Mid Am Financial Services, Inc.
          Carmel, Indiana
          Sky Financial Group, Inc. owns 100 percent

          a.  Simplicity Mortgage Consultants, Inc.
              Marion, Indiana
              Mid Am Financial Services, Inc. owns 100 percent


      9.  Freedom Financial Life Insurance Company 
          Phoenix, Arizona
          Sky Financial Group, Inc. owns 100 percent


     10.  Freedom Express, Inc.
          Salineville, Ohio
          Sky Financial Group, Inc. owns 100 percent



* On January 24, 1999, First National Bank Northwest Ohio and Adrian State Bank
merged into Mid American National Bank and Trust Company, which converted to an
Ohio chartered bank and changed its name to Mid Am Bank.





<PAGE>   1
                                                                    EXHIBIT 23.1



             CONSENT OF INDEPENDENT AUDITORS



We hereby consent to the incorporation by reference in the following
Registration Statements and in the related prospectuses of our report dated
February 16, 1999 on the consolidated balance sheets of Sky Financial Group,
Inc. as of December 31, 1998 and 1997, and the related consolidated statements
of income, comprehensive income, changes in shareholders' equity and cash flows
for each of the three years in the period ended December 31, 1998; which report
is incorporated by reference into this Annual Report on Form 10-K.

Form S-8 No. 333-67233
Form S-8 No. 333-47315 (Post-Effective Amendment No.1 on Form S-8 to Form S-4)
Form S-8 No. 333-60741 (Post Effective Amendment No.1 on Form S-8 to Form S-4)
Form S-3 No. 333-64127 (Filed as Citizens Bancshares, Inc.)
Form S-8 No. 333-18867 (Filed as Citizens Bancshares, Inc.)




                                  /s/ Crowe, Chizek and Company LLP

                                      Crowe, Chizek and Company LLP


Columbus, Ohio
March 10, 1999





<PAGE>   1
                                                                    EXHIBIT 24.1



POWER OF ATTORNEY



The undersigned directors of Sky Financial Group, Inc. hereby authorize and
appoint David R. Francisco, Chairman and C.E.O., and/or Kevin T. Thompson,
Executive Vice President and C.F.O., as our agents, as attorneys-in-fact, with
full power to act for us and all of us, for the purpose of subscribing our names
to the Form 10-K thereof to be filed with the Securities and Exchange
Commission, and for the purpose of making any changes or amendments necessary or
desirable to such documents and to any documents ancillary thereto, with the
same powers and to the same effect as we may do if personally present:

Signed in counterpart and dated this 1st day of March, 1999.


/s/ Marty E. Adams                 /s/ Gerald D. Aller
Marty E. Adams                     Gerald D. Aller

/s/ David A. Bryan                 /s/ Keith D. Burgett
David A. Bryan                     Keith D. Burgett

/s/ George N. Chandler II          /s/ Willard L. Davis
George N. Chandler II              Willard L. Davis

/s/ Del E. Goedeker                /s/ D. James Hilliker
Del E. Goedeker                    D. James Hilliker

/s/ Richard R. Hollington, Jr.     /s/ Fred H. Johnson III
Richard R. Hollington, Jr.         Fred H. Johnson III

/s/ H. Lee Kinney                  /s/ Marilyn O. McAlear
H. Lee Kinney                      Marilyn O. McAlear

/s/ James C. McBane                /s/ Kenneth E. McConnell
James C. McBane                    Kenneth E. McConnell

/s/ Gerard P. Mastroianni          /s/ Thomas S. Noneman
Gerard P. Mastroianni              Thomas S. Noneman

/s/ Edward J. Reiter               /s/ Patrick W. Rooney
Edward J. Reiter                   Patrick W. Rooney

/s/ Emerson J. Ross, Jr.           /s/ Douglas J. Shierson
Emerson J. Ross, Jr.               Douglas J. Shierson

/s/ C. Gregory Spangler            /s/ Robert E. Stearns 
C. Gregory Spangler                Robert E. Stearns

/s/ Glenn F. Thorne                /s/ Joseph N. Tosh, II
Glenn F. Thorne                    Joseph N. Tosh, II




<TABLE> <S> <C>

<ARTICLE> 9
<LEGEND>
This schedule contains summary financial information extracted from the
Consolidated Balance Sheets, the Consolidated Statements of Income and
Management's Discussion and Analysis and Statistical Information and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         165,946
<INT-BEARING-DEPOSITS>                           9,851
<FED-FUNDS-SOLD>                                26,024
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    996,426
<INVESTMENTS-CARRYING>                               0
<INVESTMENTS-MARKET>                                 0
<LOANS>                                      3,355,881
<ALLOWANCE>                                     54,008
<TOTAL-ASSETS>                               4,815,121
<DEPOSITS>                                   3,832,662
<SHORT-TERM>                                   207,458
<LIABILITIES-OTHER>                             73,388
<LONG-TERM>                                    357,771
                                0
                                          0
<COMMON>                                       311,360
<OTHER-SE>                                      32,482
<TOTAL-LIABILITIES-AND-EQUITY>               4,815,121
<INTEREST-LOAN>                                296,682
<INTEREST-INVEST>                               63,382
<INTEREST-OTHER>                                 3,616
<INTEREST-TOTAL>                               363,680
<INTEREST-DEPOSIT>                             146,385
<INTEREST-EXPENSE>                             176,556
<INTEREST-INCOME-NET>                          187,124
<LOAN-LOSSES>                                   24,968
<SECURITIES-GAINS>                               1,194
<EXPENSE-OTHER>                                232,708
<INCOME-PRETAX>                                 26,662
<INCOME-PRE-EXTRAORDINARY>                      26,662
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    17,808
<EPS-PRIMARY>                                     0.39
<EPS-DILUTED>                                     0.39
<YIELD-ACTUAL>                                    4.37
<LOANS-NON>                                     10,619
<LOANS-PAST>                                     4,061
<LOANS-TROUBLED>                                 1,892
<LOANS-PROBLEM>                                 23,168
<ALLOWANCE-OPEN>                                40,376
<CHARGE-OFFS>                                   15,208
<RECOVERIES>                                     3,872
<ALLOWANCE-CLOSE>                               54,008
<ALLOWANCE-DOMESTIC>                            38,794
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         15,214
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 9
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                         153,336
<INT-BEARING-DEPOSITS>                           7,051
<FED-FUNDS-SOLD>                                39,726
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    961,199
<INVESTMENTS-CARRYING>                          87,207
<INVESTMENTS-MARKET>                            88,018
<LOANS>                                      3,144,439
<ALLOWANCE>                                     40,376
<TOTAL-ASSETS>                               4,562,303
<DEPOSITS>                                   3,662,941
<SHORT-TERM>                                   182,362
<LIABILITIES-OTHER>                             44,027
<LONG-TERM>                                    285,695
                                0
                                          0
<COMMON>                                       218,881
<OTHER-SE>                                     168,397
<TOTAL-LIABILITIES-AND-EQUITY>               4,562,303
<INTEREST-LOAN>                                281,902
<INTEREST-INVEST>                               62,625
<INTEREST-OTHER>                                 3,004
<INTEREST-TOTAL>                               347,531
<INTEREST-DEPOSIT>                             142,216
<INTEREST-EXPENSE>                             166,917
<INTEREST-INCOME-NET>                          180,614
<LOAN-LOSSES>                                   10,928
<SECURITIES-GAINS>                               (118)
<EXPENSE-OTHER>                                164,783
<INCOME-PRETAX>                                 87,070
<INCOME-PRE-EXTRAORDINARY>                      87,070
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    59,320
<EPS-PRIMARY>                                     1.29
<EPS-DILUTED>                                     1.27
<YIELD-ACTUAL>                                    4.48
<LOANS-NON>                                     11,119
<LOANS-PAST>                                     4,822
<LOANS-TROUBLED>                                   475
<LOANS-PROBLEM>                                 30,353
<ALLOWANCE-OPEN>                                35,401
<CHARGE-OFFS>                                    8,712
<RECOVERIES>                                     2,759
<ALLOWANCE-CLOSE>                               40,376
<ALLOWANCE-DOMESTIC>                            20,302
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         20,074
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 9
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                         151,813
<INT-BEARING-DEPOSITS>                           4,446
<FED-FUNDS-SOLD>                                37,766
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    901,640
<INVESTMENTS-CARRYING>                          88,371
<INVESTMENTS-MARKET>                            88,627
<LOANS>                                      2,932,396
<ALLOWANCE>                                     35,401
<TOTAL-ASSETS>                               4,263,034
<DEPOSITS>                                   3,551,726
<SHORT-TERM>                                   186,782
<LIABILITIES-OTHER>                             40,234
<LONG-TERM>                                    107,097
                                0
                                     30,093
<COMMON>                                       199,038
<OTHER-SE>                                     148,064
<TOTAL-LIABILITIES-AND-EQUITY>               4,263,034
<INTEREST-LOAN>                                257,355
<INTEREST-INVEST>                               61,240
<INTEREST-OTHER>                                 4,455
<INTEREST-TOTAL>                               323,050
<INTEREST-DEPOSIT>                             137,288
<INTEREST-EXPENSE>                             150,936
<INTEREST-INCOME-NET>                          172,114
<LOAN-LOSSES>                                    7,713
<SECURITIES-GAINS>                               1,553
<EXPENSE-OTHER>                                149,131
<INCOME-PRETAX>                                 77,514
<INCOME-PRE-EXTRAORDINARY>                      77,514
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    53,150
<EPS-PRIMARY>                                     1.14
<EPS-DILUTED>                                     1.11
<YIELD-ACTUAL>                                    4.55
<LOANS-NON>                                      9,690
<LOANS-PAST>                                     7,395
<LOANS-TROUBLED>                                   491
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                33,315
<CHARGE-OFFS>                                    9,121
<RECOVERIES>                                     3,495
<ALLOWANCE-CLOSE>                               35,401
<ALLOWANCE-DOMESTIC>                            17,794
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         17,607
        

</TABLE>


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