<PAGE>   1
                                  10-K/A NO. 1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                       AMENDMENT TO APPLICATION OR REPORT
                  FILED PURSUANT TO SECTION 12, 13 OR 15 (d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                            SECURITY BANC CORPORATION
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

The undersigned registrant hereby amends the following items, financial
statements, exhibits or other portions of its Annual Report on Form 10-K for the
year ended December 31, 1998, as set forth in the pages attached hereto:

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

The following financial statement with respect to the Security Banc Corporation
401(k) Profit Sharing Savings Plan (the "Plan") are filed herewith as Exhibit
28.1, pursuant to Rule 15d-21 under the Securities Exchange Act of 1934, in lieu
of a filing on Form 11-K:

      (a)   Report of Independent Auditors

      (b)   Statements of Assets Available for Distribution to Plan
            Participants-December 31, 1998 and 1997

      (c)   Statements of Changes in Assets Available for Distribution to Plan
            Participants - years ended December 31, 1998 and 1997

      (d)   Notes to Financial Statements

      (e)   Schedule of Assets Held for Investment - December 31, 1998

      (f)   Schedule of Transactions or Series of Transactions in Excess of 5%
            of the current value of Plan Assets - year ended December 31, 1998

The Plan is subject to the Employee Retirement Income Security Act of 1974, as
amended, and the foregoing financial statements are filed in lieu of the
financial statements required by Items 1, 2, and 3 of Form 11-K.

The Consent of the Plan's independent auditors to the inclusion of the foregoing
financial statements herein and to the incorporation by reference of such
financial statements in the registrant's Registration Statement on Form S-8
pertaining to the Plan is attached as Exhibit 24.1.

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this amendment to be signed on its behalf by the
undersigned, thereunto duly authorized.


SECURITY BANC CORPORATION

By /s/ Thomas L. Miller                               Date:    June 29, 1999
   -------------------------                                  ---------------
   Thomas L. Miller
   Vice President/Controller
<PAGE>   2
                              Financial Statements
                         and Other Financial Information

                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                     Years ended December 31, 1998 and 1997
                      with Report of Independent Auditors
<PAGE>   3
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                              Financial Statements
                         and Other Financial Information


                     Years ended December 31, 1998 and 1997


                                    CONTENTS

<TABLE>
<S>                                                                         <C>
Report of Independent Auditors ..............................................1

Audited Financial Statements

Statements of Net Assets Available for Benefits .............................2
Statements of Changes in Net Assets Available for Benefits with Fund
  Information ...............................................................3
Notes to Financial Statements ...............................................7


Supplemental Schedules

Assets Held for Investment .................................................13
Reportable Transactions ....................................................14
</TABLE>
<PAGE>   4
                         Report of Independent Auditors


Plan Committee
  Security Banc Corporation
  401(k) Profit Sharing Savings Plan

We have audited the accompanying statements of net assets available for benefits
of the Security Banc Corporation 401(k) Profit Sharing Savings Plan (the Plan)
as of December 31, 1998 and 1997, and the related statements of changes in net
assets available for benefits with Fund Information for the years then ended.
These financial statements are the responsibility of the Plan'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. These 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 financial statements referred to above present fairly, in
all material respects, the net assets available for benefits of the Plan at
December 31, 1998 and 1997, and the changes in the net assets available for
benefits for the years then ended, in conformity with generally accepted
accounting principles.

Our audit was made for the purpose of forming an opinion on the basic financial
statements taken as a whole. The supplemental schedules of assets held for
investment as of December 31, 1998 and reportable transactions for the year
ended December 31, 1998 are presented for the purpose of complying with the
Department of Labor's Rules and Regulations for Reporting and Disclosure under
the Employee Retirement Income Security Act of 1974, and are not a required part
of the basic financial statements. The Fund Information in the statement of net
assets available for benefits and the statement of changes in net assets
available for benefits is presented for purposes of additional analysis rather
than to present the net assets available for benefits and changes in net assets
available for benefits of each fund. The supplemental schedules and Fund
Information have been subjected to the auditing procedures applied in the audit
of the basic financial statements and, in our opinion, are fairly stated in all
material respects in relation to the basic financial statements taken as a
whole.

                                                  /s/ Ernst & Young LLP

Columbus, Ohio
June 25, 1999

                                                                               1
<PAGE>   5
<TABLE>
                            Security Banc Corporation 401 (k)
                               Profit Sharing Savings Plan

                     Statements of Net Assets Available for Benefits

<CAPTION>
                                                                     DECEMBER 31
                                                                 1998            1997
                                                             ---------------------------
<S>                                                          <C>             <C>
ASSETS
Investments at fair value:
  Fidelity Advisor Institutional Growth Opportunity Fund     $   691,334     $   686,913
  Fidelity Balanced Fund                                          26,623         305,711
  Fidelity Magellan Fund                                         703,274         611,390
  PNC Temporary Fund                                             390,902         431,402
  VanGuard Index Fund                                          1,334,219         962,404
  Vanguard Wellington Fund                                       489,520              --
  Janus Worldwide Fund                                           188,284              --
  Federated Institutional Short-Duration Government Fund         181,072              --
  Franklin Small Cap Growth Fund                                 347,628              --
  Fidelity Advisor LTD Bond Fund                                      --          94,274
  Fidelity Diversified International Fund                             --         236,407
  Kaufmann Fund, Inc.                                                 --         633,059
  Security Banc Corporation Common Stock                      14,557,514       7,621,553
  Security Investment Account II                                   4,037         369,485
                                                             ---------------------------
Total Investments                                             18,914,407      11,952,598
Cash                                                                  --          21,724
                                                             ---------------------------
TOTAL ASSETS                                                  18,914,407      11,974,322

Contributions Receivable                                          31,128              --
Accrued income                                                     2,455           5,444
                                                             ---------------------------
Net assets available for benefits                            $18,947,990     $11,979,765
                                                             ===========================
</TABLE>

See accompanying notes.

                                        2
<PAGE>   6
<TABLE>
                                     Security Banc Corporation 401 (k)
                                        Profit Sharing Savings Plan

              Statement of Changes in Net Assets Available for Benefits with Fund Information

                                        Year ended December 31, 1998

<CAPTION>
                                                                 MONEY                           BANC CORP.
                                                                 MARKET        BALANCED            STOCK
                                                                  FUND           FUND               FUND
                                                                -------------------------------------------
<S>                                                             <C>            <C>              <C>
Investment income:
   Net unrealized appreciation in fair value of investments
      net of realized gains and losses                          $     --       $(26,871)        $ 5,786,075
   Interest                                                        1,676             --               6,851
   Dividends                                                      21,199         71,595             119,469
                                                                -------------------------------------------
                                                                  22,875         44,724           5,912,395
                                                                -------------------------------------------
Contributions:
   Employer                                                       10,137          4,891              96,194
   Employee                                                       24,101         12,792             398,324
                                                                -------------------------------------------
                                                                  34,238         17,683             494,518
                                                                -------------------------------------------
Total additions                                                   57,113         62,407           6,406,913

Deduction:
   Benefit payments                                               35,051          6,071             375,692
                                                                -------------------------------------------

Net increase prior to transfers between funds                     22,062         56,336           6,031,221

Transfers between funds                                          (52,526)       154,328             525,640
                                                                -------------------------------------------
Total transfers                                                  (52,526)       154,328             525,640
                                                                -------------------------------------------

Net (deductions) additions                                       (30,464)       210,664           6,556,861
Net assets available for benefits:
   Beginning of the year                                         423,181        310,057           7,986,200
                                                                -------------------------------------------
   End of the year                                              $392,717       $520,721         $14,543,061
                                                                ===========================================
</TABLE>

See accompanying notes.

3
<PAGE>   7
<TABLE>
<CAPTION>
   FIXED                                       AGGRESSIVE        COMMON        CONSERVATIVE
  INCOME         GROWTH      INTERNATIONAL      SMALL CAP      STOCK INDEX        GROWTH
   FUND           FUND           FUND          GROWTH FUND        FUND             FUND           TOTAL
----------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>            <C>               <C>           <C>
  $  1,791     $ 155,520      $  40,024         $   8,120      $  268,668        $ 113,797     $ 6,347,124
       779            --             --                --              --               --           9,306
     5,380        30,818             --             4,898          10,213           30,782         294,354
  --------------------------------------------------------------------------------------------------------
     7,950       186,338         40,024            13,018         278,881          144,579       6,650,784
  --------------------------------------------------------------------------------------------------------

     3,338        13,311          6,289            15,604          36,085           16,589         202,438
     6,945        32,614         17,224            52,154         106,137           47,197         697,488
  --------------------------------------------------------------------------------------------------------
    10,283        45,925         23,513            67,758         142,222           63,786         899,926
  --------------------------------------------------------------------------------------------------------
    18,233       232,263         63,537            80,776         421,103          208,365       7,550,710


       167        15,668          3,373            37,267          69,493           39,703         582,485
  --------------------------------------------------------------------------------------------------------

    18,066       216,595         60,164            43,509         351,610          168,662       6,968,225

    69,643      (121,679)      (108,236)         (327,157)         21,571         (161,584)             --
  --------------------------------------------------------------------------------------------------------
    69,643      (121,679)      (108,236)         (327,157)         21,571         (161,584)             --
  --------------------------------------------------------------------------------------------------------

    87,709        94,916        (48,072)         (283,648)        373,181            7,078       6,968,225

    95,122       649,083        237,294           629,797         962,119          686,912      11,979,765
  --------------------------------------------------------------------------------------------------------
  $182,831     $ 743,999      $ 189,222         $ 346,149      $1,335,300        $ 693,990     $18,947,990
  ========================================================================================================
</TABLE>

                                                                               4
<PAGE>   8
<TABLE>
                                   Security Banc Corporation 401 (k)
                                      Profit Sharing Savings Plan

            Statement of Changes in Net Assets Available for Benefits with Fund Information

                                     Year ended December 31, 1997

<CAPTION>
                                                                 MONEY                      BANC CORP.
                                                                 MARKET       BALANCED        STOCK
                                                                  FUND          FUND          FUND
                                                                --------------------------------------
<S>                                                             <C>           <C>           <C>
Investment income:
   Net unrealized appreciation in fair value of investments
      net of realized gains and losses                          $     --      $ 23,731      $2,550,298
   Interest                                                        2,035            --          23,204
   Dividends                                                      18,692        35,612         105,449
                                                                --------------------------------------
                                                                  20,727        59,343       2,678,951
                                                                --------------------------------------
Contributions:
   Employer                                                        9,937         4,051          83,669
   Employee                                                       23,453         9,918         240,540
                                                                --------------------------------------
                                                                  33,390        13,969         324,209
                                                                --------------------------------------
Total additions                                                   54,117        73,312       3,003,160

Deduction:
   Benefit payments                                               13,773         6,061          78,696
                                                                --------------------------------------

Net increase prior to transfers between funds                     40,344        67,251       2,924,464

Transfers between funds                                          (31,314)      (12,739)        (36,562)
Transfers of net assets of acquired companies                    140,581        22,081         570,505
                                                                --------------------------------------
Total transfers                                                  109,267         9,342         533,943
                                                                --------------------------------------

Net (deductions) additions                                       149,611        76,593       3,458,407
Net assets available for benefits:
   Beginning of the year                                         273,570       233,464       4,527,793
                                                                --------------------------------------
   End of the year                                              $423,181      $310,057      $7,986,200
                                                                ======================================
</TABLE>

See accompanying notes.

5
<PAGE>   9
<TABLE>
<CAPTION>
    FIXED                                       AGGRESSIVE      COMMON         CONSERVATIVE
    INCOME       GROWTH      INTERNATIONAL       SMALL CAP    STOCK INDEX         GROWTH
    FUND          FUND           FUND           GROWTH FUND      FUND              FUND           TOTAL
----------------------------------------------------------------------------------------------------------
<S>             <C>          <C>                <C>           <C>              <C>             <C>
   $ 1,422      $117,739       $  9,299          $ 28,793       $148,100         $ 81,738      $ 2,961,120
       467            --             --                --             --               --           25,706
     4,901        39,219          8,566            19,679         16,995           47,211          296,324
   -------------------------------------------------------------------------------------------------------
     6,790       156,958         17,865            48,472        165,095          128,949        3,283,150
   -------------------------------------------------------------------------------------------------------

     2,384        10,858          7,450            19,631         32,730           16,361          187,071
     5,102        28,653         25,012            56,985         88,592           54,534          532,789
   -------------------------------------------------------------------------------------------------------
     7,486        39,511         32,462            76,616        121,322           70,895          719,860
   -------------------------------------------------------------------------------------------------------
    14,276       196,469         50,327           125,088        286,417          199,844        4,003,010


     1,437        24,234          3,460             5,112          3,307            1,003          137,083
   -------------------------------------------------------------------------------------------------------

    12,839       172,235         46,867           119,976        283,110          198,841        3,865,927

      (750)       (7,919)        38,171            41,287         13,578           (3,752)              --
     8,720        45,540         53,621           126,650        293,690          108,812        1,370,200
   -------------------------------------------------------------------------------------------------------
     7,970        37,621         91,792           167,937        307,268          105,060        1,370,200
   -------------------------------------------------------------------------------------------------------

    20,809       209,856        138,659           287,913        590,378          303,901        5,236,127

    74,313       439,227         98,635           341,884        371,741          383,011        6,743,638
   -------------------------------------------------------------------------------------------------------
   $95,122      $649,083       $237,294          $629,797       $962,119         $686,912      $11,979,765
   =======================================================================================================
</TABLE>

                                                                               6
<PAGE>   10
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                          Notes to Financial Statements

                           December 31, 1998 and 1997


1. SIGNIFICANT ACCOUNTING POLICIES

BASIS OF ACCOUNTING

The financial statements of the plan are prepared on the accrual basis.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes.
Actual results could differ from those estimates.

VALUATION OF INVESTMENTS AND INCOME RECOGNITION

Marketable securities are stated at fair value. Securities traded on a national
securities exchange are valued at the last reported sales price on the last
business day of the plan year. Investments not traded on the over-the-counter
market and listed securities for which no sale was reported on that date are
valued at the average of the last reported bid and ask prices. Short-term
investment funds are stated at redemption value, which is equal to market value.

Purchases and sales of securities are recorded on a trade-date basis. Interest
income is recorded on the accrual basis. Dividends are recorded on the
ex-dividend basis.

Unrealized gains and losses are differences between the fair value and cost
basis of investments. The cost basis of the investments are using the average
cost method.

2.  DESCRIPTION OF THE PLAN

The following description of the Security Banc Corporation 401(k) Profit Sharing
Savings Plan (the Plan) provides only general information. Participants should
refer to the summary plan description for a more complete description of the
Plan's provisions.

                                                                               7
<PAGE>   11
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF THE PLAN (CONTINUED)

GENERAL

The Plan is a defined contribution plan established on January 1, 1989, which
covers all employees meeting specified age requirements and following the
completion of one year of credited service (500 hours) with an affiliate (the
Bank). The Plan is subject to the provision of the Employee Retirement Income
Security Act of 1974 (ERISA).

Effective January 1, 1997, the name of the Plan was changed to the Security Banc
Corporation 401(k) Profit Sharing Savings Plan. Also effective January 1, 1997,
the Third Savings Employee Savings Protection Plan and the CitNat Bancorp, Inc.
Urbana, Ohio, Employee Stock Ownership Plan (With 401(k) Provisions) merged into
the Plan.

CONTRIBUTIONS

Participants are not required to make contributions to the Plan; however, they
may voluntarily contribute an amount not exceeding 15 percent of their pretax
compensation received while a participant during the year. Contributions are
also subject to the maximum allowed by Internal Revenue Service (IRS)
regulations. The Bank has agreed to voluntarily contribute, each year out of its
net profits before deductions for federal income taxes, a percentage of the
matchable contributions made by each participant. The Bank is currently matching
50 percent of each participant's contributions up to the first 6 percent of a
participant's compensation.

PARTICIPANT ACCOUNTS

Each participant's account is credited with the participant's contributions,
Bank's contributions and allocation of earnings or losses. Earnings or losses of
the trust fund are allocated quarterly among participants in the proportion that
each participant's account balance bears to the total value of all participants'
account balances. The Bank pays all expenses of administering the Plan.

                                                                               8
<PAGE>   12
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF THE PLAN (CONTINUED)

VESTING

Participants are immediately vested in their contributions plus actual earnings
thereon. Vesting in the remainder of their accounts is based on years of
continuous service. A participant vests 20 percent per year of credited service
for five years and is 100 percent vested after five years of credited service.
Forfeitures will be used to reduce future Bank matching contributions or will be
allocated to the separate account of each participant.

TERMINATION OF PLAN

Although the Bank has not expressed any intent to do so, the Bank has the right
under the Plan to discontinue contributions at any time and terminate the Plan.
In the event of termination of the Plan, distribution would be made to
participants in the amount of their respective account balances. Under the Plan,
all contributions and earnings thereon are immediately vested and fully
nonforfeitable.

PAYMENT OF BENEFITS

On termination of service, a participant may receive a lump-sum amount equal to
the vested value of his or her account, or upon death, disability or retirement,
elect to receive annual installments over a period not to exceed fifteen years.

3. INVESTMENT OPTIONS

Plan participants may allocate their accounts between funds based on an election
filed at the start of the quarter after the employee becomes eligible to
participate in the Plan. Participants may change their allocation at any time.

The Plan provides for nine separate investment programs with separate funds.

Money Market Fund - The fund seeks to obtain a high level of current income as
is consistent with the preservation of principal and liquidity within the
standards of the Portfolio.

                                                                               9
<PAGE>   13
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                    Notes to Financial Statements (continued)


3. INVESTMENT OPTIONS (CONTINUED)

Balanced Fund - The fund seeks to obtain as much income as possible, consistent
with preservation of capital, by investing in a broadly diversified portfolio of
high yielding securities, including common stocks, preferred stocks, and bonds.

Banc Corporation Stock Fund - The fund provides a means to invest in shares of
Security Banc Corporation Common Stock, $1.5625 par value. Security Banc
Corporation is the parent corporation of the Bank.

Fixed Income Fund - The fund seeks a high rate of income through investment in
high and upper-medium grade fixed-income obligations.

Growth Fund - The fund seeks capital appreciation by investing primarily in
common stock and securities convertible into common stock that offer potential
for growth.

International Fund - The fund seeks capital growth through investments in
foreign securities.

Aggressive Small Cap Growth Fund - The fund seeks long-term capital appreciation
by investing primarily in common stocks of small and medium-sized companies and
securities convertible into common stock.

Common Stock Index Fund - The funds seeks investment results that correspond
with the price and yield performance of the S&P 500 index.

Conservative Growth Fund - The fund seeks capital appreciation by investing
primarily in common stocks and securities convertible into common stock.

                                                                              10
<PAGE>   14
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                    Notes to Financial Statements (continued)


4. INVESTMENTS (CONTINUED)

The Plan's investments are held by a trustee, the Bank's trust department. The
following individual investments represent 5 percent or more of the fair value
of assets available for benefits as of December 31, 1998 and 1997:

<TABLE>
<CAPTION>
                                                 DECEMBER 31
                                              1998          1997
                                           ------------------------
<S>                                        <C>           <C>
Security Banc Corporation Common Stock     $14,557,514   $7,621,553
VanGuard Index Fund                          1,334,219      962,404
</TABLE>

The Plan's investments (including investments bought, sold, and held during the
year) appreciated (depreciated) in carrying value as follows:

<TABLE>
<CAPTION>
                                      YEAR ENDED DECEMBER 31
                                        1998          1997
                                     ------------------------
<S>                                  <C>           <C>
Conservative Growth Fund             $  113,797    $   81,738
Fixed Income Fund                         1,791         1,422
Balanced Fund                           (26,871)       23,731
International Fund                       40,024         9,299
Growth Fund                             155,520       117,739
Aggressive Small Cap Growth Fund          8,120        28,793
Banc Corp. Stock Fund                 5,786,075     2,550,298
Common Stock Index Fund                 268,668       148,100
                                     ------------------------
Total                                $ 6,347,124   $2,961,120
                                     ========================
</TABLE>

                                                                              11
<PAGE>   15
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                    Notes to Financial Statements (continued)


5. INCOME TAX STATUS

The Internal Revenue Service ruled on January 19, 1996 that the Plan qualifies
under Section 401(a) of the Internal Revenue Code (IRC) and, therefore, the
related trust is not subject to tax under present income tax law. Once
qualified, the Plan is required to operate in conformity with the IRC to
maintain its qualification. The Plan was amended effective January 1, 1997 and
again November 7, 1997; the plan administrator filed for a new determination
letter March 13, 1998. The plan administrator is not aware of any course of
action or series of events that have occurred that might adversely affect the
Plan's qualified status.

6. YEAR 2000 ISSUE (UNAUDITED)

The Plan Sponsor has implemented a plan to modify its internal information
technology to be ready for the year 2000 and has begun converting critical data
processing systems. The project also includes determining whether third party
service providers have reasonable plans in place to become year 2000 compliant.
The Plan Sponsor currently expects the project to be substantially complete by
early 1999. The Plan Sponsor does not expect the Year 2000 issue to have a
significant effect on plan operations.

                                                                              12
<PAGE>   16
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                           Assets Held for Investment

                                December 31, 1998

<TABLE>
<CAPTION>
                                                                        FAIR
          DESCRIPTION                      SHARES        COST           VALUE
--------------------------------------------------------------------------------
<S>                                       <C>         <C>            <C>
Fidelity Advisor Institutional
  Growth Opportunity Fund                  13,794     $  541,368     $   691,334
Federated Institutional Short
  Duration Govt. Bond Fund                 90,536        181,929         181,072
Fidelity Balanced Fund                      1,626         22,878          26,623
Vanguard Wellington Fund                   16,679        508,742         489,520
Janus Worldwide Fund                        3,976        149,763         188,284
Fidelity Magellan Fund                      5,839        491,442         703,274
Franklin Small Cap Growth Fund             15,402        272,360         347,628
PNC Temporary Fund                        390,902        390,902         390,902
Security Investment Account II              4,037          4,037           4,037
Security Banc Corporation Common
  Stock*                                  316,468      4,525,172      14,557,514
VanGuard Index Fund                        11,709        972,464       1,334,219
                                                      --------------------------
Total assets held for investment                      $8,061,057      18,914,407
                                                      ==========================
</TABLE>

* Party in interest to the plan.

                                                                              13
<PAGE>   17
                        Security Banc Corporation 401 (k)
                           Profit Sharing Savings Plan

                             Reportable Transactions

                          Year ended December 31, 1998

<TABLE>
<CAPTION>
                                                                                    NET
                                  NUMBER   NUMBER                                 PROCEEDS
                                    OF      OF      PURCHASE       SELLING          FROM          NET
          DESCRIPTION           PURCHASES  SALES      PRICE         PRICE           SALE          GAIN
---------------------------------------------------------------------------------------------------------
<S>                             <C>        <C>     <C>            <C>            <C>            <C>

CATEGORY (III) - A SERIES OF TRANSACTIONS IN EXCESS OF 5% OF PLAN ASSETS
------------------------------------------------------------------------

Franklin Small Cap Growth Fund      18       5     $  408,512     $  136,151     $  152,493     $ 16,342
Kaufmann Fund, Inc.                 56      31         55,253        650,236        604,823      (45,413)
Vanguard Wellington Fund            19       8        523,070         14,328         15,085          757
Security Banc Corporation Common
  Stock                             90      57      1,512,823         75,545        194,386      118,841
Security Investment Account II      97      47        934,881      1,300,329      1,300,329           --
VanGuard Index Fund                 85      41        311,826        169,571        208,680       39,109
</TABLE>

There were no Category (i), (ii) or (iv) reportable transactions during the year
ended December 31, 1998.

                                                                              14