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                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D. C. 20549
                           -------------------------
 
                                   FORM 10-K
                ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
 
  FOR THE FISCAL YEAR ENDED
    DECEMBER 31, 1997                             COMMISSION FILE NUMBER 0-24630
 
                           MAHASKA INVESTMENT COMPANY
 
                                                          42-1003699
         Incorporated in Iowa                 I.R.S. Employer Identification No.
222 FIRST AVENUE EAST, OSKALOOSA, IOWA                      52577
 
        Registrant's telephone number, including area code: 515-673-8448
SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
 


         TITLE OF EACH CLASS          NAME OF EACH EXCHANGE ON WHICH REGISTERED
         -------------------          -----------------------------------------
                                    
                NONE                                    NONE

 
          Securities registered pursuant to Section 12(g) of the Act:
                          Common Stock, $5 par value
 
     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 the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [  ]
 
     The aggregate market value of the voting stock held by non-affiliates of
the registrant as of March 2, 1998, was $49,709,633.
 
     Indicate the number of shares outstanding of each of the issuer's classes
of common stock, as of the most recent practicable date, March 2, 1998.
 
                  3,673,816 shares Common Stock, $5 par value
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
     The Annual Report to Shareholders for the 1997 fiscal year is incorporated
by reference into Part II hereof to the extent indicated in such Part.
 
     The definitive proxy statement of Mahaska Investment Company for the
1998 annual meeting of shareholders is incorporated by reference into Part II
and Part III hereof to the extent indicated in such Parts.
 
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                               TABLE OF CONTENTS
 


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                                    PART I
Item 1.   Business....................................................      1
          A. General Description......................................      1
          B. Subsidiaries.............................................      1
          C. Loan Pool Participations.................................      2
          D. Competition..............................................      5
          E. Supervision and Regulation...............................      5
          F. Employees................................................      8
          G. Statistical Disclosure...................................      8
Item 2.   Properties..................................................     22
Item 3.   Legal Proceedings...........................................     22
Item 4.   Submission of Matters to a Vote of Security Holders.........     22
 
                                   PART II
Item 5.   Market for the Registrant's Common Equity and Related
            Stockholder Matters.......................................     22
Item 6.   Selected Financial Data.....................................     23
Item 7.   Management's Discussion and Analysis of Financial Condition
            and Results of Operations.................................     23
Item 7a.  Market Risk Disclosure......................................     23
Item 8.   Financial Statements and Supplementary Data.................     23
Item 9.   Changes in and Disagreements with Accountants on Accounting
            and Financial Disclosure..................................     23
 
                                   PART III
Item 10.  Directors and Executive Officers of the Registrant..........     23
Item 11.  Executive Compensation......................................     23
Item 12.  Security Ownership of Certain Beneficial Owners and
            Management................................................     23
Item 13.  Certain Relationships and Related Transactions..............     23
 
                                   PART IV
Item 14.  Exhibits, Financial Statement Schedules and Reports on Form
            8-K.......................................................     24

 
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                                     PART I
 
ITEM 1. BUSINESS
 
A. GENERAL DESCRIPTION
 
     Mahaska Investment Company (the "Company") is a financial services holding
company headquartered in Oskaloosa, Mahaska County, Iowa. The Company was
incorporated in Iowa in 1973 and is a bank holding company registered under the
Bank Holding Company Act of 1956 and a savings and loan holding company under
the Savings and Loan Holding Company Act. The Company owns 100% of the stock of
three bank subsidiaries (collectively referred to as the "Banks"). These three
banks are Mahaska State Bank ( "MSB"), Central Valley Bank ("CVB"), and Pella
State Bank ("PSB"). The Company also owns 100% of the stock of On-Site Credit
Services, Inc. ("On-Site").
 
     The Bank subsidiaries engage in retail and commercial banking and related
financial services, providing the usual products and services such as deposits,
commercial, real estate, and consumer loans, and trust services. MSB also
provides data processing services to affiliated and non-affiliated banks.
On-Site provides equipment leasing, factoring and accounts receivable financing
to small-business clients.
 
     Since 1988, the Company, either directly or through the Banks, has invested
in loan pool participations that have been purchased by certain non-affiliated
independent service corporations (collectively, the "Servicer") from the Federal
Deposit Insurance Corporation ("FDIC"), the Resolution Trust Corporation
("RTC"), or from other sources. These loan pool investments generally consist of
distressed or nonperforming loans, that have been sold at prices reflecting
varying discounts from the aggregate outstanding principal amount of the
underlying loans depending on the credit quality of the portfolio. The Servicer
then proceeds to collect these loans from the borrowers.
 
     The Company provides services to the Banks and to On-Site including
management assistance, auditing services, preparation of tax returns, assistance
with respect to accounting and operating systems and procedures, and loan
review. Charges for these services are based on the nature and extent of these
services.
 
B. SUBSIDIARIES
 
     Mahaska State Bank -- MSB is a full-service, commercial bank which was
chartered as an Iowa state bank in 1931. The Bank operates in south central Iowa
and serves all of Mahaska county from its main bank and two branch offices in
Oskaloosa and serves portions of Keokuk and Iowa counties from its branch office
in North English. The Bank also maintains one drive-up automated teller machine
located in Oskaloosa. The Bank provides a wide array of retail and commercial
banking services, including demand, savings and time deposits, loans, trust
services, and data processing services to CVB and PSB and to two non-affiliated
banks. The Bank also provides full-service brokerage services to its customers
through an affiliation with an independent broker.
 
     Central Valley Bank -- CVB is a full-service, federally-chartered savings
bank which was formed as a de novo institution by the Company in June 1994. CVB
also operates in south central Iowa from its main office in Ottumwa, which
serves Wapello County, and from its two branches located in Fairfield and one
branch in Sigourney, which serve Jefferson and Keokuk counties, respectively.
CVB provides retail deposit services including demand, savings, and time deposit
products and offers commercial, agricultural, real estate, and consumer loans.
During 1997, the Bank formed a wholly-owned service corporation, Valley
Financial Services, Inc., to provide crop insurance products to its customers.
 
     Pella State Bank -- PSB is a full-service, Iowa state chartered commercial
bank which the Company formed as a de novo institution in December 1997. PSB
mainly serves the community of Pella, Iowa and the surrounding area located in
Marion County. The office of the bank is a newly-remodeled facility which the
Company purchased and renovated in 1997. The Bank provides full retail and
commercial banking services to its customers. The Bank also provides
full-service brokerage services to its customers through an affiliation with an
independent broker.
 
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     On-Site Credit Services, Inc. -- On-Site is an Iowa corporation which was
formed by the Company in 1974 under the name of MIC Leasing Co. The company
operated under the name of On-Site Commercial Services until June 1997 when the
name was officially changed to On-Site Credit Services, Inc. On-Site originates
and services machinery and equipment leases to small businesses and farmers. The
funding of these leases is either provided by On-Site through funds provided by
the Company or by MSB, with On-Site receiving a broker fee. On-Site also
provides accounts receivable financing and factoring services to small
businesses mainly in the state of Iowa.
 
C. LOAN POOL PARTICIPATIONS
 
     The Company, directly and through MSB and CVB, has participation interests
in pools currently held and serviced by three separate independent servicing
corporations (referred to collectively as the "Servicer"). The three independent
servicing corporations are Central States Resources Corporation, Midstates
Resources Corporation, and All States Resources Corporation. The Company does
not have any ownership interest in or control over these servicing corporations.
The independent servicing corporations are owned by Randal Vardaman and Nyle
Johnson. Mr. Vardaman has been engaged in credit analysis and loan portfolio
management in various positions since 1970. He founded Central States Resources
Corporation in 1988 and organized Midstates Resources Corporation in 1991 and
All States Resources Corporation in 1993. Prior to the formation of the
servicing corporations, he reviewed various FDIC loan pool packages,
participated in the liquidation of certain banking institutions in Iowa, and
served as assistant liquidator at the FDIC's Division of Liquidation. Mr.
Johnson has served as credit supervisor with the servicing corporations since
their inceptions. Prior thereto, he served as section chief of commercial loans
for the FDIC Division of Liquidation.
 
     The Company has invested in loan pools purchased by the Servicer at deep
discounts from the aggregate outstanding principal amount of the underlying
loans. The loan pools were sold by the FDIC or the RTC acting as conservator,
receiver, or liquidator of failed banks and savings and loan institutions, and
by other large nonaffiliated banking organizations. The loans comprising the
pools were originated throughout the United States. As part of the agreement to
purchase participation interests in the loan pools, the Company and its
subsidiaries have contracted with the Servicer to service the underlying loans
within the respective loan pools which are owned of record by the Servicer. The
Servicer also evaluates various loan pools prior to purchase and makes
recommendations to the Company concerning the creditworthiness of proposed loan
pool purchases and proposes appropriate bids to the Company and any other
potential pool participants.
 
     The Servicer has bid on loan pools from various regional offices of the
FDIC and the RTC, and from other sources. The Company, MSB and CVB have
purchased participation interests in such pools. The purchase prices paid by the
Company for loan pool participations have ranged from 5.5% to 85.0% of the
aggregate outstanding principal amount of the loans comprising such pools at the
time of purchase. The Servicer acquires the loan pools without recourse against
the sellers and, accordingly, the risk of noncollectibility is, for the most
part, assumed by the Company and any other investors in a particular pool.
 
     The FDIC is the only United States government agency which currently offers
loan pools. There is no assurance that it will continue to do so. Federal law
mandated that after July 1, 1995, the RTC no longer was appointed to act as
conservator or liquidator and was phased out of existence by year end 1995;
however, the FDIC assumed the RTC's role with respect to failed savings and
loans, as well as continuing in its role as conservator for failed banks.
Beginning in 1996, the Servicer successfully bid on packages of loans offered
for sale by large banking organizations headquartered in various regions of the
United States. Should the opportunity to invest in loan pools not exist in the
future, the Company intends to invest available funds in other income producing
assets.
 
     Each pool has a different composition and different characteristics. The
composition of a loan pool is generally determined by the seller based on its
desire to maximize the price it receives for all loans among the various pools.
Some pools may consist of a large number of small consumer loans which are
unsecured or are secured by other assets such as automobiles or mobile homes,
while other pools may consist of loans primarily secured by real estate, and yet
other pools may consist of small to medium balance commercial loans. Still other
pools may contain a mixture of such loans and other types of loans. Some pools
may contain significant
 
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numbers of past-due nonperforming loans while other pools are comprised almost
entirely of performing loans. The price bid and paid for such a loan pool is
determined based on the composition of the particular pool, the amounts the
Servicer believes can be collected on such a pool, and the risks associated with
the collection of such amounts.
 
     In considering an investment in a loan pool, the Servicer will evaluate
loans owned and being offered and make recommendations to the Company and other
prospective investors concerning the creditworthiness of the proposed loan pool
purchase. The Servicer performs a comprehensive analysis of the loan pool in an
attempt to ensure proper valuation and adequate safeguards in the event of
default. The bid price on the loan pools will be reflective of the results of
the Servicer's pre-acquisition review of the loan files. In many cases the loan
files may not be current and substantial uncertainties may exist regarding the
collectibility of the various loans in the pool. Management believes that in
many instances the non-current loans can be brought current once the Servicer
has an opportunity to contact the debtor. The Company makes its own decisions as
to whether or not to participate in a particular loan pool which has been
recommended by the Servicer, based on the Company's experience with the various
categories and qualities of loans.
 
     The sales of loan pools by the FDIC and by other sellers is generally
conducted by sealed bid auction. A sealed bid auction requires each bidder to
submit a confidential bid on the subject loan pool and the loan pool is awarded
to the highest bidder. In recent years, the Servicer and the Company have faced
increasing competition in bidding for loan pools.
 
     Since 1988, the Servicer, on behalf of the Company and other investors, has
bid on a large number of loan pools and has been successful in purchasing 58
loan pools. The Company and other investors in the loan pools fund the purchase
by the Servicer and each investor receives a percentage interest in the loan
pool based on its proportional investment relative to the total purchase price
of the pool. Each investor receives a loan pool participation certificate
reflecting this interest.
 
     The purchased loan pools consist, for the most part, of loans evidenced by
promissory notes and secured by either personal property or real property. The
value of the collateral may range from nominal to substantial and often may be
impossible to establish prior to acquisition of the pools with the level of
certainty that is typically required in a financial institution.
 
     Upon the acquisition of a participation interest in a loan pool, the
Company assumes the risk that the Servicer will be unable to recover an amount
equal to the purchase price plus the carrying costs, if any, collection costs
and expected profits on such accounts. The extent of such risk is dependent on a
number of factors, including the Servicer's ability to locate the debtors, the
debtors' financial condition, the possibility that a debtor may file for
protection under applicable bankruptcy laws, the Servicer's ability to locate
the collateral, if any, for the loan and to obtain possession of such
collateral, the value of such collateral, and the length of time it takes to
realize the ultimate recovery either through collection procedures or through a
resale of the loans following a restructure.
 
     Loan pool participations are shown on the Company's balance sheet as a
separate asset category. The original carrying value of loan pool participations
represents the discounted price paid by the Company to acquire its participation
interests in various loan pools purchased by the Servicer. The Company's
investment balance is reduced as the Servicer collects principal payments on the
loans and remits the proportionate share of such payments to the Company.
 
     A cost "basis" is assigned to each individual loan acquired on a cents per
dollar (discounted price) based on the Servicer's assessment of the recovery
potential of each such loan. This methodology assigns a higher basis to
performing loans with greater potential collectibility and a lower basis to
those loans identified as having little or no collectibility.
 
     The investment in loan pools is accounted for on a nonaccrual (or cash)
basis in one of three methods, depending on the circumstances. First, if a
borrower makes regular payments on a loan, the payment received is first applied
to interest income in the amount of interest due at the contract rate. Further
payments are applied to principal in a ratio reflecting the proportion of cost
basis to loan principal amount. Payments in excess of interest and this ratio
are recorded as discount income. Discount income earned over the life of a

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loan represents loan principal collected in excess of the price originally paid
to acquire the loan from the FDIC, the RTC, or any other sellers, which price
constitutes the cost "basis" of the loan.
 
     Secondly, if the borrower fails to make regular payments, the Servicer
evaluates the collateral supporting the loan. If the Servicer determines that
the loan is well secured, then payments are applied as previously described. If
the Servicer determines that the collateral is deficient, payments are applied
to the principal balance of the loan with no recognition of interest due. The
cost recovery method governs the application of payments received to the
outstanding principal balance. Under this method, any amount received is
initially applied to the cost "basis" of the loan and any additional amounts
received are recognized as discount income.
 
     Third, where the Servicer negotiates a settlement of a loan for a lump sum,
the payment is first applied to principal to the extent of the assigned cost
"basis" with the excess treated as discount income up to the original principal
value of the loan, and any remainder is treated as interest income on loan pool
participations. In each case, where changed circumstances or new information
lead the Servicer to believe that collection of the note or recovery of the
basis through collateral would be less than originally determined, the cost
basis assigned to the loan is written down or written off through a charge
against discount income.
 
     Collection expenses incurred by the Servicer are netted against discount
income. Discount income is added to interest income and reflected as one amount
on the Company's consolidated statement of income. Profit (or loss) from
collection activities is determined on a monthly basis for each servicing
corporation from which loan pool participation interests have been purchased.
 
     The Company does not recognize as income any accrued interest receivable on
the loan pools. Interest income is only recognized when collected and actually
remitted to the Company by the Servicer. Many of the pools that have been
purchased by the Servicer do not include purchased interest in the cost basis;
thus, interest collected does not have a cost basis and represents profit.
Interest income collected by the Servicer is reflected in the Company's
financial statements as interest income included as part of interest income and
discount on loan pool participations.
 
     The Servicer provides the Company with monthly reports detailing
collections of principal and interest, face value of loans collected and those
written off, actual operating expenses incurred, remaining asset balances (both
in terms of cost basis and principal amount of loans), a comparison of actual
collections and expenses with target collections and budgeted expenses, and
summaries of remaining collection targets. Monthly meetings are held between the
Company and representatives of the Servicer to review collection efforts and
results, to discuss future plans of action, and to discuss potential
opportunities. Additionally, the Company's and the Servicer's personnel
communicate via telephone and telecopy on a regular basis to discuss various
issues regarding the loan pools. Company management personnel visit the
Servicer's operation in Omaha, Nebraska on a regular basis. The Company's loan
review officer performs regular examinations of the Servicer's credit files and
evaluates collection activity.
 
     The Servicer is reimbursed for costs incurred to collect loan principal and
interest, which are netted against loan principal and interest collections.
These costs include salary and benefits paid by the Servicer to its employees,
legal fees, and other overhead expenses. Each loan pool investment is tracked on
an individual basis with the Servicer receiving a "Servicing Fee" of up to
twenty-five percent of net interest collected based on the percentage of net
loan principal collections to the original investment amount. Once the original
investment amount has been fully recovered, the Servicer is no longer entitled
to the Servicing Fee. In lieu of the Servicing Fee, the Servicer receives a
"Bonus Fee" of ten percent of all subsequent net collections and receives a
twenty-five percent participation interest in the individual pool and shares
proportionally in all future collections, net of costs and Bonus Fees.
 
     The Company's overall cost basis in its loan pool participations represents
a deep discount from the aggregate outstanding principal amount of the loans
underlying the pools. For example, as of December 31, 1997 and 1996, such cost
basis was $54,326,000 and $50,687,000, respectively, while the contractual
outstanding principal amounts of the underlying loans as of such dates were
approximately $99,948,000 and $99,888,000, respectively. Because this discounted
cost basis inherently reflects the assessed collectibility of the underlying
loans and thus creates a built-in reserve against the risk of nonpayment in the
loan pools, the
 
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Company is not required to establish any allowance for loan losses relating to
the loan pool participations. The Company does not include any amounts related
to the loan pool participations in its totals of nonperforming loans.
 
      The underlying loans in the loan pool participations include both fixed
rate and variable rate instruments, but are accounted for on a nonaccrual
basis, and no amounts for interest due are reflected in the carrying value of
the loan pool participations. Based on historical experience, the average
period of collectibility for loans underlying the Company's loan pool
participations, many of which have exceeded contractual maturity dates, is
approximately one to three years. Management has reviewed the recoverability
of the underlying loans and believes that the carrying value does not exceed
the net realizable value of its investment in loan pool participations.
 
D. COMPETITION
 
     The Company competes in the commercial banking and thrift industries
through its subsidiary banks. These industries are highly competitive, and all
the bank subsidiaries face strong direct competition for deposits, loans, and
other financial-related services. The Banks in Mahaska, Marion, Wapello, Keokuk,
Iowa and Jefferson counties in south-central Iowa compete with other commercial
banks, other thrifts, credit unions, stockbrokers, finance divisions of auto and
farm equipment companies, agricultural suppliers, and other agricultural-related
lenders. Some of these competitors are local, while others are statewide or
nationwide. The Banks compete for deposits principally by offering depositors a
wide variety of deposit programs, convenient office locations, hours and other
services, and for loan originations primarily through interest rates and loan
fees they charge, the efficiency and quality of services they provide to
borrowers and the variety of their loan products. Some of the financial
institutions and financial service organizations with which the Banks compete
are not subject to the same degree of regulation as that imposed on bank and
thrift holding companies, federally insured Iowa-chartered banks, and federal
savings banks. As a result, such competitors have advantages over the Banks in
providing certain services. As of December 31, 1997, approximately twenty
commercial banks, three thrifts, and seven credit unions operated within a
25-mile radius of Oskaloosa, and new competitors may develop that are
substantially larger and have significantly greater resources than any of the
Banks. Currently, major competitors in certain of the Company's markets include
banking subsidiaries of Norwest Corporation, Firstar Corporation of Iowa,
Mercantile Bank and NationsBank. As a result of recently passed federal
legislation to allow unlimited interstate branching, the Company may experience
heightened competition from these and other major financial institutions seeking
to expand their regional banking presence in Iowa.
 
     The Company also faces competition with respect to its investments in loan
pool participations. The Company's financial success to date is largely
attributable to the Servicer's ability to determine the loan pools to bid on and
ultimately purchase, the availability of assets to fund the purchases and the
Servicer's ability to collect on the underlying assets. Investments in loan
pools have become increasingly popular in recent years, leading financial
institutions and other competitors to become active at loan pool auctions
conducted by the FDIC and other sellers. There is no assurance that the Company,
through the Servicer, will be able to bid successfully in the future. Certain
existing competitors of the Company are substantially larger and have
significantly greater financial resources than the Company. Increased
participation by new institutions or other investors may also create increased
buying interest which could also result in higher bid prices for the type of
loan pools considered for investment by the Company. In addition, new and
existing competitors may develop due diligence procedures comparable to the
Servicer's procedures. The emergence of such competition could have a material
adverse effect on the Company's business and financial results.
 
E. SUPERVISION AND REGULATION
 
     Bank holding companies, banks, savings and loan holding companies, and
savings and loan associations are extensively regulated under federal and state
law. References under this heading to applicable statutes or regulations are
brief summaries of the portions thereof which do not purport to be complete and
which are qualified in their entirety by reference to those statutes and
regulations. Any change in applicable laws or regulation may have a material
adverse effect on the business of the Company and the Banks.

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     The Company, as a bank holding company, is subject to regulation under the
Bank Holding Company Act of 1956 (the "Act") and is registered with the Board of
Governors of the Federal Reserve System. Under the Act, the Company is
prohibited, with certain exceptions, from acquiring direct or indirect ownership
or control of more than 5% of the voting shares of any company which is not a
bank and from engaging in any business other than that of banking, managing and
controlling banks or furnishing services to affiliated banks, except that the
Company may engage in and own shares of companies engaged in certain businesses
found by the Board of Governors to be so closely related to banking "as to be
proper incident thereto," such as owning a savings association. The Act does not
place territorial restrictions on the activities of bank-related subsidiaries of
bank holding companies. The Company is required by the Act to file periodic
reports of its operations with the Board of Governors and is subject to
examination by the Board of Governors. Under the Act and Federal Reserve Board
regulations, the Company and the Bank are prohibited from engaging in certain
tie-in arrangements in connection with an extension of credit, lease, sale of
property, or furnishing of services.
 
     Iowa law permits bank holding companies domiciled in Iowa to make
acquisitions throughout the state. Iowa law also permits bank holding companies
located in the Midwestern Region (defined to include Illinois, Iowa, Minnesota,
Missouri, Nebraska, South Dakota, and Wisconsin) to acquire banks or bank
holding companies located in Iowa subject to approval by the Iowa Division of
Banking and subject to certain statutory limitations. In addition, the Company
may acquire banks or bank holding companies located in the Midwestern Region or
outside the Midwestern Region, provided the Company's principal place of
business remains in the Midwestern Region and the acquisition is authorized by
the laws of the state in which the acquisition is to be made.
 
     As a savings and loan holding company, the Company is subject to federal
regulation and examination by the Office of Thrift Supervision (the "OTS"). The
OTS has enforcement authority over the Company. This authority permits the OTS
to restrict or prohibit activities that are determined to be a serious risk to
the subsidiary savings association. Generally, the activities for a bank holding
company are more limited than the authorized activities for a savings and loan
holding company.
 
     The Company and its subsidiaries are affiliates within the meaning of the
Federal Reserve Act and OTS regulations. As affiliates, they are subject to
certain restrictions on loans by an affiliated bank to the Company, other
affiliated banks or such other subsidiaries, on investments by an affiliated
bank in their stock or securities and on an affiliated bank taking such stock
and securities as collateral for loans to any borrower. The Company is also
subject to certain restrictions with respect to direct issuance, flotation,
underwriting, public sale or distribution of certain securities.
 
     Under Iowa law, Mahaska State Bank and Pella State Bank are subject to
supervision and examination by the Iowa Division of Banking. As an affiliate of
these banks, the Company is also subject to examination by the Iowa Division of
Banking.
 
     The deposits of the Banks are insured by the Federal Deposit Insurance
Corporation (the "FDIC") and the Banks are, therefore, also subject to the
supervision and examination by the FDIC. The Banks are required to maintain
certain minimum capital ratios established by these regulators.
 
     In addition, Iowa state law imposes restrictions on the operations of the
state-chartered banks including limitations on the amount a bank can lend to a
single borrower and limitations on the nature and amount of securities in which
it may invest. Among other things, Iowa law imposes restrictions on certain
types of loans made by a bank, limiting the bank from making loans (or
purchasing participation interests in loan pools) secured by real estate located
outside Iowa and its contiguous states in amounts exceeding 25% of its
regulatory capital. There can be no assurance that the Iowa or federal
regulators will not in the future impose further restrictions or limits on the
Company's loan pool activities.
 
     Iowa law strictly regulates the establishment of bank offices and thus may
affect the Company's future plans to establish additional offices of its banks.
Under Iowa law, a state bank may not establish a bank office outside the
boundaries of the counties contiguous to or cornering upon the county in which
the principal place of business of the state bank is located. The number of
offices a state bank may establish in a particular municipality is also limited
depending upon the municipality's population.
 
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     Central Valley Bank is subject to the supervision of and is regularly
examined by the OTS and is assessed fees by the OTS based upon the thrift's
total assets. As a savings institution, CVB is a member of the Federal Home Loan
Bank of Des Moines, must maintain certain minimum capital ratios established by
the OTS and is required to meet a qualified thrift lender test (the "QTL") to
avoid certain restrictions upon its operations. The QTL was modified by the
passage of the Economic Growth and Regulatory Paperwork Reduction Act of 1996.
On December 31, 1997, CVB complied with the current minimum capital guidelines
and met the QTL test.
 
     OTS regulations permit federally chartered savings associations to branch
nationwide to the extent allowed by federal statute, enabling federal savings
associations with interstate networks to diversify their loan portfolios and
lines of business.
 
     The Company operates within a regulatory structure that continuously
evolves. In the last several years significant changes have occurred that affect
the Company.
 
     The FDIC Improvement Act of 1991 (the "FDICIA") was primarily designed to
recapitalize the FDIC's Bank Insurance Fund (the "BIF") and the Savings
Association Insurance Fund (the "SAIF"). To accomplish this purpose the FDIC was
granted additional borrowing authority, granted the power to levy emergency
special assessments on all insured depository institutions, granted the power to
change the BIF and SAIF rates on deposits on a semiannual basis, and directed to
draft regulations that provided for a "Risk-Based Assessment System" that was
implemented on January 1, 1994. The FDICIA also imposed additional regulatory
safety and soundness standards upon depository institutions and granted
additional authority to the FDIC. The FDICIA generally requires that all
institutions be examined by the FDIC annually. Under the provisions of the
FDICIA, all regulatory authorities are required to examine their regulatory
accounting standards and, to the extent possible, are required to conform to
Generally Accepted Accounting Principles. Finally, the FDICIA requires the
federal banking regulators to take prompt corrective action with respect to
depository institutions that fall below certain capital standards and prohibits
any depository institution from making any capital distribution that would cause
it to be undercapitalized.
 
     The Banks are assessed fees based on the institutions' deposits by the
FDIC, to insure the funds of customers on deposit with the institutions. The
deposits of MSB (except those acquired from a failed thrift), all of PSB's
deposits and the CVB deposits acquired from Boatmen's are insured by the BIF.
The deposits of CVB and those deposits of MSB acquired from the failed thrift
are insured by the SAIF. On August 8, 1995, the FDIC reduced the assessment rate
applicable to MSB to $.04 per $100 of insured deposits. This reduced assessment
rate was retroactively effective to June 1, 1995. MSB and CVB continued to pay
an insurance rate of $.23 per $100 of deposits on their SAIF deposits through
September 30, 1996. Upon the adoption of the Deposit Insurance Funds Act of
1996, MSB and CVB were assessed a one-time charge equal to $.675 per $100 of
SAIF-insured deposits to recapitalize the SAIF. Subsequent to this special
assessment, all BIF and SAIF-insured deposits are assessed at an equal rate.
 
     Legislation became effective on September 30, 1995 which serves to lessen
or remove certain legal barriers to interstate banking and branching by
financial institutions. The legislation may result in an increase in the
nationwide consolidation activity occurring among financial institutions by
facilitating interstate bank operations and acquisitions. The legislation does,
however, allow states to "opt out" of interstate branching, and at this time it
is difficult to predict what effect this legislation might have on the Company.
 
     The earnings of the Company are affected by the policies of regulatory
authorities, including the Federal Reserve System. Federal Reserve System
monetary policies have had a significant effect on the operating results of
banks and thrifts in the past and are expected to do so in the future. Because
of changing conditions in the economy and in the money markets as a result of
actions by monetary and fiscal authorities, interest rates, credit availability
and deposit levels may change due to circumstances beyond the control of the
Company. Future policies of the Federal Reserve System and other authorities
cannot be predicted, nor can their effect on future earnings be predicted.
 
                                        7
   10
 
F. EMPLOYEES
 
     On December 31, 1997, the Company had 108 full-time employees and 22
part-time employees of which 53 full-time and 15 part-time employees were
employed by MSB, 32 full-time and 6 part-time employees were employed by CVB, 5
full-time and 1 part-time employees were employed by PSB, 7 full-time employees
were employed by On-Site, and 11 full-time employees were employed directly by
the Company. The Company provides its employees with a comprehensive program of
benefits, some of which are on a contributory basis, including comprehensive
medical and dental plans, life insurance, long-term and short-term disability
coverage, a 401(k) plan, and an employee stock ownership plan. None of the
employees are represented by unions. Management considers its relationship with
its employees to be excellent.
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE
 
     The following statistical disclosures relative to the consolidated
operations of the Company have been prepared in accordance with Guide 3 of the
Guides for the Preparation and Filing of Reports and Registration Statements
under the Securities Exchange Act of 1934. Average balances were primarily
calculated on a daily basis.
 
I. DISTRIBUTION OF ASSETS, LIABILITIES AND SHAREHOLDERS' EQUITY; INTEREST RATES
   AND INTEREST DIFFERENTIAL
 
     The following table details average balances, interest income/expense and
average rates/yield for the Company's earning assets and interest bearing
liabilities for the years ended December 31, 1997, 1996 and 1995 reported on a
fully tax-equivalent basis assuming a 34% tax rate.


                                                      YEAR ENDED DECEMBER 31,
                             -------------------------------------------------------------------------
                                             1997                                  1996
                             ------------------------------------   ----------------------------------
                                          INTEREST                              INTEREST
                             AVERAGE     INCOME(2)/     AVERAGE     AVERAGE    INCOME(2)/    AVERAGE
                             BALANCE      EXPENSE      RATE/YIELD   BALANCE     EXPENSE     RATE/YIELD
                             -------     ----------    ----------   -------    ----------   ----------
                                                                          
Average earning assets:
  Loans(1).................  $131,081     $12,282         9.37%     $105,372    $10,203        9.68%
  Loan pool
    participations.........    49,399       8,474        17.15        50,105      9,097       18.16
  Interest-bearing
    deposits...............     2,085         108         5.20         5,097        266        5.23
  Investment securities
    available for sale:
    Taxable investments....    26,052       1,705         6.55        20,557      1,348        6.56
  Investment securities
    held to maturity:
    Taxable investments....    16,421         928         5.65        21,616      1,215        5.62
    Tax exempt
      investments..........     7,459         486         6.51         9,510        619        6.51
  Federal funds sold.......     2,375         128         5.39         1,704         92        5.39
                             --------     -------                   --------    -------
    Total earning assets...  $234,872     $24,111        10.27      $213,961    $22,840       10.67
                             ========     =======                   ========    =======
Average interest-bearing
  liabilities:
  Interest-bearing demand
    deposits...............  $ 32,225     $   677         2.10      $ 28,785    $   612        2.13
  Savings deposits.........    59,019       2,259         3.83        53,844      2,058        3.82
  Time deposits............    96,609       5,441         5.63        86,056      4,845        5.63
  Federal funds
    purchased..............       534          32         5.93           830         48        5.73
  Federal Home Loan Bank
    advances...............     2,274         138         6.07             0          0        0.00
  Notes payable............     9,292         765         8.23        11,323        968        8.55
                             --------     -------                   --------    -------
    Total interest-bearing
      liabilities..........  $199,953     $ 9,312         4.66      $180,838    $ 8,531        4.72
                             ========     =======                   ========    =======
Net interest income........                14,799         5.61                   14,309        5.96
Net interest margin(3).....                               6.30%                                6.69%
                                                         =====                                =====
 

                                  YEAR ENDED DECEMBER 31,
                             ----------------------------------
                                            1995
                             ----------------------------------
                                         INTEREST
                             AVERAGE    INCOME(2)/    AVERAGE
                             BALANCE     EXPENSE     RATE/YIELD
                             -------    ----------   ----------
                                            
Average earning assets:
  Loans(1).................  $ 81,174    $ 7,775        9.58%
  Loan pool
    participations.........    45,582      7,864       17.25
  Interest-bearing
    deposits...............     3,040        175        5.76
  Investment securities
    available for sale:
    Taxable investments....    10,391        668        6.43
  Investment securities
    held to maturity:
    Taxable investments....    23,711      1,251        5.28
    Tax exempt
      investments..........     9,106        595        6.53
  Federal funds sold.......     3,441        202        5.87
                             --------    -------
    Total earning assets...  $176,445    $18,530       10.50
                             ========    =======
Average interest-bearing
  liabilities:
  Interest-bearing demand
    deposits...............  $ 25,325    $   632        2.49
  Savings deposits.........    42,699      1,816        4.25
  Time deposits............    71,636      3,959        5.53
  Federal funds
    purchased..............       671         42        6.20
  Federal Home Loan Bank
    advances...............         0          0        0.00
  Notes payable............     7,327        651        8.89
                             --------    -------
    Total interest-bearing
      liabilities..........  $147,658    $ 7,100        4.81
                             ========    =======
Net interest income........               11,430        5.69
Net interest margin(3).....                             6.48%
                                                       =====

 
- -------------------------
(1) Average loans outstanding includes the daily average balance of
    non-performing loans. Interest on these loans does not include additional
    interest of $122,000, $90,000, and $15,000 for 1997, 1996 and 1995,
    respectively, which would have been accrued based on the original terms of
    these loans compared to the
 
                                        8
   11
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
I. DISTRIBUTION OF ASSETS, LIABILITIES AND SHAREHOLDERS' EQUITY; INTEREST RATES
   AND INTEREST DIFFERENTIAL, CONTINUED
   interest that was actually recorded. Interest earned on loans includes loan
   fees (which are not material in amount).
 
(2) Includes interest income and discount on loan pool participations.
 
(3) Net interest margin is net interest income divided by average total earning
    assets.
 
     The following table sets forth an analysis of volume and rate changes in
interest income and interest expense of the Company's average earning assets and
average interest-bearing liabilities reported on a fully tax-equivalent basis
assuming a 34% tax rate. The table distinguishes between the changes related to
average outstanding balances (changes in volume holding the initial interest
rate constant) and the changes related to average interest rates (changes in
average rate holding the initial outstanding balance constant). The change in
interest due to both volume and rate has been allocated to volume and rate
changes in proportion to the relationship of the absolute dollar amounts of the
change in each.
 


                                                               YEAR ENDED DECEMBER 31,
                                               --------------------------------------------------------
                                                 1997 COMPARED TO 1996         1996 COMPARED TO 1995
                                               INCREASE/(DECREASE) DUE TO   INCREASE/(DECREASE) DUE TO
                                               --------------------------   ---------------------------
                                               VOLUME     RATE      NET     VOLUME     RATE       NET
                                               ------     ----      ---     ------     ----       ---
                                                                (DOLLARS IN THOUSANDS)
                                                                              
INTEREST INCOME FROM AVERAGE-EARNING ASSETS:
  Loans......................................  $2,449    $(370)   $2,079    $2,330    $   98    $2,428
  Loan pool participations(1)................    (125)    (498)     (623)      801       432     1,233
  Interest-bearing deposits..................    (157)      (1)     (158)      113       (22)       91
  Investment securities available for sale:
     Taxable investments.....................     360       (3)      357       660        20       680
  Investment securities held to maturity:
     Taxable investments.....................    (293)       6      (287)     (114)       78       (36)
     Tax exempt investments..................    (133)       0      (133)       26        (2)       24
  Federal funds sold.........................      36        0        36       (98)      (12)     (110)
                                               ------    -----    ------    ------    ------    ------
     Total income from earning assets........   2,137     (866)    1,271     3,718       592     4,310
                                               ------    -----    ------    ------    ------    ------
INTEREST EXPENSE OF AVERAGE INTEREST-BEARING
  LIABILITIES:
  Interest-bearing demand deposits...........      72       (7)       65        80      (100)      (20)
  Savings deposits...........................     198        3       201       450      (208)      242
  Time deposits..............................     594        2       596       805        81       886
  Federal funds purchased....................     (17)       1       (16)        9        (3)        6
  Federal Home Loan Bank advances............      69       69       138         0         0         0
  Notes payable..............................    (170)     (33)     (203)      348       (31)      317
                                               ------    -----    ------    ------    ------    ------
     Total expense from interestbearing
       liabilities...........................     746       35       781     1,692      (261)    1,431
                                               ------    -----    ------    ------    ------    ------
Net interest income..........................  $1,391    $(901)   $  490    $2,026    $  853    $2,879
                                               ======    =====    ======    ======    ======    ======

 
- -------------------------
(1) Includes interest income from loan pool participations plus discount
realized on loan pool participations.
 
                                        9
   12
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
I. DISTRIBUTION OF ASSETS, LIABILITIES AND SHAREHOLDERS' EQUITY; INTEREST RATES
   AND INTEREST DIFFERENTIAL, CONTINUED
INTEREST RATE SENSITIVITY ANALYSIS
 
     The following table sets forth the scheduled repricing or maturity of the
Company's assets and liabilities as of December 31, 1997, based on the
assumptions described below. The effect of these assumptions is to quantify the
dollar amount of items that are interest rate-sensitive and can be repriced
within each of the periods specified. The table does not necessarily indicate
the impact of general interest rate movements on the Company's net interest
margin because the repricing of certain categories of assets and liabilities is
subject to competitive and other pressures beyond the Company's control. As a
result, certain assets and liabilities indicated as maturing or otherwise
repricing within a stated period may, in fact, mature or reprice at different
times and at different volumes.
 


                                               THREE      OVER THREE      ONE TO      THREE
                                               MONTHS       MONTHS        THREE       YEARS
                                              OR LESS     TO ONE YEAR     YEARS      OR MORE     TOTAL
                                              -------     -----------     ------     -------     -----
                                                                (DOLLARS IN THOUSANDS)
                                                                                 
INTEREST-EARNING ASSETS:
Loans.....................................    $ 30,024     $ 35,242      $ 26,461    $52,606    $144,333
Loan pool participations..................       4,527       13,582        36,217          0      54,326
Interest-bearing deposits in banks........       1,526            0             0          0       1,526
Federal funds sold........................       6,815            0             0          0       6,815
Investment securities:
  Available for sale......................           0          499         8,379     14,350      23,228
  Held to maturity........................       2,749        7,005         5,768      4,311      19,833
                                              --------     --------      --------    -------    --------
     Total interest-earning assets........      45,641       56,328        76,825     71,267     250,061
                                              ========     ========      ========    =======    ========
INTEREST-BEARING LIABILITIES:
NOW and Super NOW deposits................      11,629       11,629         9,968          0      33,226
Savings deposits..........................      11,780       11,810        17,715     17,715      59,020
Certificates of deposit...................      21,372       30,466        45,094      4,853     101,785
Federal Home Loan Bank advances...........           0        1,000         5,000          0       6,000
Notes payable.............................      14,050            0             0          0      14,050
                                              --------     --------      --------    -------    --------
     Total interest-bearing liabilities...      58,831       54,905        77,777     22,568     214,081
                                              ========     ========      ========    =======    ========
Interest sensitivity gap per period.......    $(13,190)    $  1,423      $   (952)   $48,699
                                              ========     ========      ========    =======
Cumulative interest sensitivity gap.......    $(13,190)    $(11,767)     $(12,719)   $35,980
                                              ========     ========      ========    =======
Interest sensitivity gap ratio............        0.78%        1.03%         0.99%      3.16%
Cumulative interest sensitivity gap
  ratio...................................        0.78%        0.90%         0.93%      1.17%

 
     In the table above, NOW and Super NOW deposit account balances and savings
deposits are included as interest-bearing liabilities in the three months or
less, and over three months to one year, and one to three years categories in
accordance with the proposed revision to the banking regulatory authorities'
risk-based capital guidelines issued in August 1992. This results in the
distribution of 70% of NOW and Super NOW account balances to the less than one
year categories and the remaining 30% to the one to three years category.
Savings deposits are included 70% in the less than three year categories and the
remaining 30% in the three years or more category.
 
     Loan pool participations are included in the interest rate sensitivity
analysis using an estimated three-year average life. The historical average for
the return of original investment on the pools is approximately 36 months. Given
the non-performing aspect of the loan pool portfolio, management feels that the
use of contractual weighted-average maturity data in inappropriate.
 
                                       10
   13
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
II. INVESTMENT PORTFOLIO
 
     The following table sets forth certain information with respect to the book
value of the Company's investment portfolio as of December 31, 1997, 1996 and
1995.
 


                                                                           DECEMBER 31,
                                                                -----------------------------------
                                                                 1997          1996          1995
                                                                 ----          ----          ----
                                                                      (DOLLARS IN THOUSANDS)
                                                                                   
SECURITIES AVAILABLE FOR SALE:
  U.S. government securities................................    $ 4,563       $ 5,019       $ 5,101
  U.S. government agency securities.........................     15,313        18,679         5,059
  Other investment securities...............................      3,352         2,785         1,627
                                                                -------       -------       -------
     Total securities available for sale....................     23,228        26,483        11,787
                                                                -------       -------       -------
SECURITIES HELD TO MATURITY:
  U.S. government securities................................      5,046         8,135        12,247
  U.S. government agency securities.........................      2,885         5,445         6,810
  Obligations of states and political subdivisions..........      6,793         8,904         9,574
  Other investment securities...............................      5,109         5,221         2,202
                                                                -------       -------       -------
     Total securities held to maturity......................     19,833        27,705        30,833
                                                                -------       -------       -------
  Total investment securities...............................    $43,061       $54,188       $42,620
                                                                =======       =======       =======

 
     The following table sets forth the contractual maturities of investment
securities as of December 31, 1997, and the weighted average yields (for
tax-exempt obligations on a fully tax-equivalent basis assuming a 34% tax rate)
of such securities. As of December 31, 1997, the Company held no securities with
a book value exceeding 10% of shareholders' equity.
 


                                                                       MATURITY
                                      --------------------------------------------------------------------------
                                                           AFTER ONE BUT      AFTER FIVE BUT
                                                            WITHIN FIVE         WITHIN TEN
                                      WITHIN ONE YEAR          YEARS               YEARS         AFTER TEN YEARS
                                      ----------------    ----------------    ---------------    ---------------
                                      AMOUNT     YIELD    AMOUNT     YIELD    AMOUNT    YIELD    AMOUNT    YIELD
                                      -------    -----    -------    -----    ------    -----    ------    -----
                                                                (DOLLARS IN THOUSANDS)
                                                                                   
Securities available for sale:
  U.S. government securities......    $     0    0.00%    $ 4,563    6.13     $    0    0.00%    $    0    0.00%
  U.S. government agency
     securities...................        499    5.88       9,676    6.52          0    0.00      5,138    7.00
  Other Investment securities.....          0    0.00       2,010    5.94          0    0.00      1,342    5.94
                                      -------             -------             ------             ------
     Total........................        499    5.88      16,249    6.34          0    0.00      6,480    6.78
                                      -------             -------             ------             ------
Securities held to maturity:
  U.S. government securities......      5,046    5.07           0    0.00          0    0.00          0    0.00
  U.S. government agency
     securities...................      1,000    4.89           0    0.00        474    6.95      1,411    7.44
  Obligations of states and
     political subdivisions.......      1,916    6.51       3,693    6.84      1,184    6.88          0    0.00
  Other investment securities.....      1,793    5.79       3,216    5.78          0    0.00        100    7.15
                                      -------             -------             ------             ------
     Total........................      9,755    5.47       6,909    6.35      1,658    6.90      1,511    7.42
                                      -------             -------             ------             ------
Total investment securities.......    $10,254    5.49%    $23,158    6.34%    $1,658    6.90%    $7,991    6.90%
                                      =======    ====     =======    ====     ======    ====     ======    ====

 
                                       11
   14
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
III. LOAN PORTFOLIO
 
     The Company's loan portfolio largely reflects the profile of the
communities in which it operates. Approximately two-thirds of the total loans as
of December 31, 1997, were agricultural, commercial or residential real estate
loans. The following table shows the composition of the Company's loan portfolio
as of the dates indicated.
 


                                                                 DECEMBER 31,
                         --------------------------------------------------------------------------------------------
                               1997               1996               1995               1994               1993
                         ----------------   ----------------   ----------------   ----------------   ----------------
                                    % OF               % OF               % OF               % OF               % OF
                          AMOUNT    TOTAL    AMOUNT    TOTAL    AMOUNT    TOTAL    AMOUNT    TOTAL    AMOUNT    TOTAL
                          ------    -----    ------    -----    ------    -----    ------    -----    ------    -----
                                                            (DOLLARS IN THOUSANDS)
                                                                                  
Agricultural...........  $ 24,779    17.2%  $ 19,940    17.0%  $ 16,319    18.9%  $ 15,968    21.5%  $ 16,644    25.7%
Commercial.............    31,198    21.6     23,613    20.1     22,235    25.7     18,789    25.3     14,853    22.9
Real estate:
  1-4 family
    residences.........    32,341    22.4     27,274    23.2     15,765    18.2     14,261    19.2     12,757    19.7
  5 + residential
    property...........       251     0.2        261     0.2          0     0.0         17     0.0         24     0.0
  Agricultural.........    19,647    13.6     16,952    14.4      9,855    11.4      8,443    11.4      7,499    11.6
  Construction.........     4,430     3.1      4,017     3.4      2,502     2.9      1,859     2.5        436     0.7
  Commercial...........    15,634    10.8     11,895    10.1     10,097    11.7      9,018    12.2      7,288    11.3
                         --------   -----   --------   -----   --------   -----   --------   -----   --------   -----
  Real estate total....    72,303    50.1     60,399    51.4     38,219    44.2     33,598    45.3     28,004    43.3
                         --------   -----   --------   -----   --------   -----   --------   -----   --------   -----
Installment............    13,268     9.2     11,522     9.8      7,637     8.8      4,700     6.3      4,673     7.2
Lease financing........     2,785     1.9      1,942     1.7      2,066     2.4      1,154     1.6        596     0.9
                         --------   -----   --------   -----   --------   -----   --------   -----   --------   -----
  Total loans(1).......  $144,333   100.0%  $117,416   100.0%  $ 86,475   100.0%  $ 74,209   100.0%  $ 64,770   100.0%
                         ========   =====   ========   =====   ========   =====   ========   =====   ========   =====
Total assets...........  $274,873           $251,851           $205,162           $186,818           $143,752
                         ========           ========           ========           ========           ========   
Loans to total
  assets...............              52.5%              46.6%              42.1%              39.7%              45.1%

 
- -------------------------
(1) Total loans do not include the Company's investments in loan pool
    participations.
 
     The following table sets forth the remaining maturities for certain loan
categories as of December 31, 1997.
 


                                                                                             TOTAL FOR LOANS DUE
                                                                                               AFTER ONE YEAR
                                                                                                   HAVING:
                                                        DUE IN                               -------------------
                                        DUE WITHIN      ONE TO      DUE AFTER                 FIXED     VARIABLE
                                         ONE YEAR     FIVE YEARS    FIVE YEARS     TOTAL      RATES      RATES
                                        ----------    ----------    ----------     -----      -----     --------
                                                                 (DOLLARS IN THOUSANDS)
                                                                                      
Agricultural........................     $21,227       $ 3,299        $  253      $24,779    $ 3,354     $  198
Commercial..........................      22,407         7,641         1,150       31,198      8,185        606
Real estate -- construction.........       3,003         1,427             0        4,430        877        550
                                         -------       -------        ------      -------    -------     ------
     Total..........................     $46,637       $12,367        $1,403      $60,407    $12,416     $1,354
                                         =======       =======        ======      =======    =======     ======

 
     The following table provides information on the Company's non-performing
loans as of the dates indicated.
 


                                                                          DECEMBER 31,
                                                           ------------------------------------------
                                                            1997      1996     1995    1994     1993
                                                            ----      ----     ----    ----     ----
                                                                     (DOLLARS IN THOUSANDS)
                                                                                
90 days past due.......................................    $  522    $  625    $134    $ 95    $   22
Renegotiated...........................................       387       380     409     285       440
Nonaccrual.............................................       927     1,085     124     207       129
                                                           ------    ------    ----    ----    ------
     Total non-performing loans........................    $1,836    $2,090    $667    $587    $  591
                                                           ======    ======    ====    ====    ======
Ratio of non-performing loans to total loans...........      1.27%     1.78%   0.78%   0.79%     0.91%

 
                                       12
   15
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
IV. SUMMARY OF LOAN LOSS EXPERIENCE
 
     The following table sets forth loans charged off and recovered by the type
of loan and an analysis of the allowance for loan losses for the years ended
December 31, 1997, 1996, 1995, 1994 and 1993.
 


                                                                YEAR ENDED DECEMBER 31,
                                                 -----------------------------------------------------
                                                   1997        1996       1995       1994       1993
                                                   ----        ----       ----       ----       ----
                                                                (DOLLARS IN THOUSANDS)
                                                                                
Amount of loans outstanding at end of period
  (net of unearned interest)(1)..............    $144,333    $117,416    $85,869    $74,015    $64,700
                                                 ========    ========    =======    =======    =======
Average amount of loans outstanding for the
  period (net of unearned interest)(1).......    $131,081    $105,372    $81,175    $69,043    $61,130
                                                 ========    ========    =======    =======    =======
Allowance for possible loan losses at
  beginning of period........................    $  1,491    $  1,001    $   881    $   833    $   820
                                                 --------    --------    -------    -------    -------
CHARGE-OFFS:
  Agricultural...............................          19          41         53         42         87
  Commercial.................................          14          10         18        110         34
  Real estate - construction.................           0           0          0          0          0
  Real estate - mortgage.....................          30           0          2          0          2
  Installment................................          63          38         18         23         28
  Lease financing............................          11         616          0         14          2
                                                 --------    --------    -------    -------    -------
     Total charge-offs.......................         137         705         91        189        153
                                                 --------    --------    -------    -------    -------
RECOVERIES:
  Agricultural...............................          11           6         24         11         11
  Commercial.................................          18           1          1         36          7
  Real estate - construction.................           0           0          0          0          0
  Real estate - mortgage.....................           1           0          0          2          1
  Installment................................          15           8         10          5          4
  Lease financing............................           0          23          8          0          0
                                                 --------    --------    -------    -------    -------
     Total recoveries........................          45          38         43         54         23
                                                 --------    --------    -------    -------    -------
Net loans charged off........................          92         667         48        135        130
Provision for possible loan losses...........         417         987        168        183        143
Allowance for branch acquisition.............           0         170          0          0          0
                                                 --------    --------    -------    -------    -------
Allowance for possible loan losses at end of
  period.....................................    $  1,816    $  1,491    $ 1,001    $   881    $   833
                                                 ========    ========    =======    =======    =======
Net loans charged off to average loans.......        0.07%       0.63%      0.06%      0.20%      0.21%
Allowance for possible loan losses to total
  loans at end of period.....................        1.26%       1.27%      1.17%      1.19%      1.29%

 
- -------------------------
(1) Loans do not include, and the allowance for loan losses does not include any
    reserve for, investments in loan pool participations.
 
                                       13
   16
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
IV. SUMMARY OF LOAN LOSS EXPERIENCE, CONTINUED
     The Company has allocated the allowance for loan losses to provide for the
possibility of loan losses being incurred within the categories of loans set
forth in the table below. The allocation of the allowance and the ratio of loans
within each category to total loans as of the dates indicated are as follows:


                                                                  DECEMBER 31,
                      -----------------------------------------------------------------------------------------------------
                               1997                      1996                      1995                      1994
                      -----------------------   -----------------------   -----------------------   -----------------------
                                  PERCENT OF                PERCENT OF                PERCENT OF                PERCENT OF
                      ALLOWANCE    LOANS TO     ALLOWANCE    LOANS TO     ALLOWANCE    LOANS TO     ALLOWANCE    LOANS TO
                       AMOUNT     TOTAL LOANS    AMOUNT     TOTAL LOANS    AMOUNT     TOTAL LOANS    AMOUNT     TOTAL LOANS
                      ---------   -----------   ---------   -----------   ---------   -----------   ---------   -----------
                                                             (DOLLARS IN THOUSANDS)
                                                                                        
Agricultural.........  $  312         17.2%      $  254         17.0%      $  262         18.9%       $242          21.5%
Commercial...........     392         21.6          300         20.1          248         25.7         271          25.3
Real estate --
  mortgage...........     910         50.1          766         51.4          392         44.2         302          45.3
Installment..........     167          9.2          146          9.8           78          8.8          55           6.3
Lease financing......      35          1.9           25          1.7           21          2.4          11           1.6
                       ------        -----       ------        -----       ------        -----        ----         -----
    Total............  $1,816        100.0%      $1,491        100.0%      $1,001        100.0%       $881         100.0%
                       ======        =====       ======        =====       ======        =====        ====         =====
 

                            DECEMBER 31,
                       -----------------------
                                1993
                       -----------------------
                                   PERCENT OF
                       ALLOWANCE    LOANS TO
                        AMOUNT     TOTAL LOANS
                       ---------   -----------
                       (DOLLARS IN THOUSANDS)
                             
Agricultural.........    $308          25.7%
Commercial...........     288          22.9
Real estate --
  mortgage...........     200          43.3
Installment..........      33           7.2
Lease financing......       4           0.9
                         ----         -----
    Total............    $833         100.0%
                         ====         =====

 
V. DEPOSITS
 
     The following table sets forth the average amount of and the average rate
paid on deposits by deposit category for the years ended December 31, 1997, 1996
and 1995.
 

                                                        
                                                              YEAR ENDED DECEMBER 31,
                                            -----------------------------------------------------------
                                                  1997                 1996                 1995
                                            -----------------    -----------------    -----------------
                                            AVERAGE              AVERAGE              AVERAGE
                                            BALANCE     RATE     BALANCE     RATE     BALANCE     RATE
                                            -------     ----     -------     ----     --------    ----
                                                              (DOLLARS IN THOUSANDS)
                                                                                
Non-interest bearing demand deposits....    $ 17,465    N/A      $ 15,653    N/A      $ 12,269    N/A
Interest-bearing demand (NOW and money
  market)...............................      32,225    2.10%      28,785    2.13%      25,325    2.49%
Savings deposits........................      59,019    3.83       53,844    3.82       42,699    4.25
Time deposits...........................      96,609    5.63       86,056    5.63       71,636    5.53
       Totals...........................    $205,318     4.0%    $184,338    4.08%    $151,929    4.22%

 
     The following table summarizes certificates of deposit in amounts of
$100,000 or more by time remaining until maturity as of December 31, 1997. These
time deposits are made by individuals, corporations and public entities, all of
which are located in the Company's market area or are State of Iowa public
funds.
 


                                                                 DECEMBER 31,
                                                                     1997
                                                                 ------------
                                                                (IN THOUSANDS)
                                                             
Three months or less........................................       $ 6,611
Over three through six months...............................         3,113
Over six months through one year............................         1,700
Over one year...............................................         8,331
                                                                   -------
  Total.....................................................       $19,755
                                                                   =======

 
                                       14
   17
 
ITEM 1(G) BUSINESS -- STATISTICAL DISCLOSURE, CONTINUED
VI. RETURN ON EQUITY AND ASSETS
 
     Various operating and equity ratios for the years indicated are presented
below:
 


                                                         YEAR ENDED DECEMBER 31,
                                                      -----------------------------
                                                      1997        1996        1995
                                                      ----        ----        ----
                                                                     
Return on average total assets......................   1.98%       1.93%       2.04%
Return on average equity............................  14.47       13.52       12.67
Dividend payout ratio...............................  34.78       36.50       38.37
Average equity to average assets....................  13.69       14.31       16.09
Equity to assets ratio..............................  13.37       13.60       15.65
                                                      =====       =====       =====

 
VII. BORROWED FUNDS
 
     The following table summarizes the outstanding amount of and the average
rate on short-term borrowings as of December 31, 1997, 1996 and 1995.
 


                                                                    DECEMBER 31,
                                           ---------------------------------------------------------------
                                                 1997                   1996                   1995
                                           -----------------      -----------------      -----------------
                                                     AVERAGE                AVERAGE                AVERAGE
                                           BALANCE    RATE        BALANCE    RATE        BALANCE    RATE
                                           -------   -------      -------   -------      -------   -------
                                                               (DOLLARS IN THOUSANDS)
                                                                                 
Note payable(1)..........................  $14,050    8.25%       $8,500     8.00%       $10,000    8.50%
Federal Home Loan Bank advances..........    6,000    5.96             0     0.00              0    0.00
Federal funds purchased..................        0    0.00             0     0.00              0    0.00
                                           -------    ----        ------     ----        -------    ----
     Total...............................  $20,050    7.56%       $8,500     8.00%       $10,000    8.50%
                                           =======    ====        ======     ====        =======    ====

 
- -------------------------
(1) The note payable balance at December 31, 1997 consists of advances on a
    $17,000,000 revolving line of credit. The line has a variable interest rate
    which currently is twenty-five basis points below the lender's prime rate.
    Interest is payable quarterly and the line is due June 30, 1998.
 
     The maximum amount of borrowed funds outstanding at any month end for the
years ended December 31, 1997, 1996, and 1995 were as follows:
 


                                                   1997         1996         1995
                                                   ----         ----         ----
                                                       (DOLLARS IN THOUSANDS)
                                                                   
Note payable....................................  $14,050      $14,750      $10,000
Federal Home Loan Bank advances.................    6,000            0            0
Federal funds purchased.........................    2,150        5,990        5,475

 
     The following table sets forth the average amount of and the average rate
paid on borrowed funds for the years ended December 31, 1997, 1996 and 1995.
 


                                                               YEARS ENDED DECEMBER 31,
                                                ------------------------------------------------------
                                                     1997                1996                1995
                                                --------------      --------------      --------------
                                                AVERAGE             AVERAGE             AVERAGE
                                                BALANCE   RATE      BALANCE   RATE      BALANCE   RATE
                                                -------   ----      -------   ----      -------   ----
                                                                (DOLLARS IN THOUSANDS)
                                                                                
Note payable..................................  $ 9,292   8.23%     $11,323   8.55%     $7,327    8.89%
Federal Home Loan Bank advances...............    2,274   6.07            0   0.00           0    0.00
Federal funds purchased.......................      534   5.93          829   5.73         671    6.20
                                                -------             -------             ------
     Total....................................  $12,100   7.72%     $12,152   8.36%     $7,998    8.66%
                                                =======   ====      =======   ====      ======    ====

 
                                       15
   18
 
ITEM 2. PROPERTIES
 
     The Company's headquarters are located at 222 First Avenue East, Oskaloosa,
Iowa. This building is a two-story combination office and motor bank and was
constructed in 1975. The Company's offices are located on the second floor and
the Bank leases the first floor and the basement from the Company. The ground
floor houses MSB's data processing department and motor bank operation which
includes four drive-up lanes and two walk-up windows. The basement contains a
meeting room, kitchen, and storage. The bank's lease runs through the year 2005.
 
     The principal offices of Mahaska State Bank are located at 124 South First
Street, Oskaloosa, Iowa, in a two-story building owned by the bank which
contains a full banking facility. The bank also owns a second building in
Oskaloosa located at 301 A Avenue West. This one-story, full-banking facility,
including two drive-up lanes, is located five blocks northwest of the bank's
principal offices. In addition, the bank owns a 24-hour automatic teller machine
located at 211 South First Street, Oskaloosa, Iowa. The bank also has a branch
office located in North English, Iowa which is 40 miles northeast of Oskaloosa.
The branch is a one-story building with a full banking facility, including two
drive-up lanes and a 24-hour automatic teller machine.
 
     Central Valley Bank owns three facilities in the communities of Ottumwa,
Fairfield, and Sigourney, Iowa. The Ottumwa building is a single-story brick
structure constructed in 1981. The approximately 4,200 square foot building has
several offices and a potential for three drive-up lanes, with two presently in
operation. The building is located at 116 West Main in Ottumwa's downtown
business district. The Fairfield facility is a two-story building located at 58
East Burlington on the southeast corner of the downtown square. The building's
three floors have 8,932 total square feet, which is all now utilized by CVB. The
Sigourney facility located at 112 North Main Street is one-half block northwest
of the community's courthouse square in the downtown business district. The
4,596 square foot one-story masonry building was constructed in 1972 as a
banking facility with one drive-up window. This building was acquired by CVB in
1996 from Boatmen's Bank, N.A. in conjunction with the purchase of the deposits
of the Sigourney office from Boatmen's.
 
     CVB leases its "In-Store" branch facility in Fairfield. The branch is
located in an Easter's Super Value grocery store and occupies approximately 400
square feet of the store. The lease agreement expires in October, 2000 and may
be renewed for two additional terms of five years each.
 
     Pella State Bank owns its newly-remodeled facility at 500 Oskaloosa Street
in Pella, Iowa. The facility is located approximately six blocks south of the
community's main business district on a heavily-traveled thoroughfare that
connects the main business district with retail stores located in a developing
area on the east side of the community. The one-time restaurant building was
acquired in the summer of 1997 and was completely renovated to become a modern
banking facility. The facility now contains approximately 1,860 square feet of
usable space and has two drive-up teller lanes.
 
ITEM 3. LEGAL PROCEEDINGS
 
     Mahaska Investment Company and its subsidiaries are involved in various
claims and legal actions arising in the ordinary course of business. In the
opinion of management, the ultimate disposition of these matters will not have a
material adverse effect on the Company's financial position or results of
operations.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
     There were no matters submitted during the fourth quarter of the fiscal
year covered by this report to a vote of security holders, through the
solicitation of proxies or otherwise.
 
                                    PART II
 
ITEM 5. MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
        MATTERS
 
     The information appearing on page 23 of the Corporation's Annual Report,
filed as Exhibit 13 hereto, is incorporated herein by reference.
 
                                       16
   19
 
     There were approximately 235 holders of record of the Company's $5 common
stock as of March 2, 1998. Additionally, there are an estimated 700 additional
beneficial holders whose stock was held in street name by brokerage houses as of
that date. The closing price of the Company's common stock was $20.625 on March
2, 1998.
 
     The Company declared a five-for-three stock split effected in the form of a
stock dividend payable to shareholders of record as of October 20, 1997. The
additional shares resulting from this stock split were issued to shareholders on
November 10, 1997. The Company increased the cash dividends paid to common
shareholders in 1997 to $.48 per share, a 9.1 percent increase over $.44 for
1996. Dividend declarations are evaluated and determined by the Board of
Directors on a quarterly basis. In February 1998, the Board of Directors
declared a dividend of $.14 per common share. The Company's loan agreement
requires that the Company does not pay any dividends in excess of forty percent
of net income without the lenders' permission. Except for certain regulatory
restrictions that may affect dividend payments, there are no other restrictions
on the Company's present or future ability to pay dividends.
 
ITEM 6. SELECTED FINANCIAL DATA
 
     The information appearing on page 1 of the Company's Annual Report, filed
as Exhibit 13 hereto, is incorporated herein by reference.
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS
 
     The information appearing on pages 18 through 23 of the Appendix to the
Company's definitive Proxy Statement is incorporated herein by reference.
 
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
     The information appearing on pages 24 through 43 of the Appendix to the
Company's definitive Proxy Statement is incorporated herein by reference.
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE
 
     Within the twenty-four months prior to the date of the most recent
financial statements, there has been no change of accountants of the Company.
 
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
     The definitive proxy statement of Mahaska Investment Company is
incorporated herein by reference.
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     The definitive proxy statement of Mahaska Investment Company is
incorporated herein by reference.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
     The definitive proxy statement of Mahaska Investment Company is
incorporated herein by reference.
 
                                       17
   20
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K
 
     The following exhibits and financial statement schedules are filed as part
of this report:
 
     (a) 1. Financial Statements: See the financial statements on pages 24
            through 43 of the Company's definitive Proxy Statement which are
            incorporated by reference herein.
 
          2. Exhibits (not covered by independent auditors' report).
 


        EXHIBIT
        -------
                   
          3.1         Articles of Incorporation, as amended, of Mahaska Investment
                      Company. The Articles of Incorporation, as amended, of
                      Mahaska Investment Company are incorporated by reference to
                      the Company's Annual Report on Form 10-K for the year ended
                      December 31, 1996.
          3.2         Bylaws of Mahaska Investment Company. The Bylaws of Mahaska
                      Investment Company are incorporated by reference to the
                      Company's Annual Report on Form 10-K for the year ended
                      December 31, 1996.
         10.1         Mahaska Investment Company Employee Stock Ownership Plan &
                      Trust as restated and amended. This Plan & Trust is
                      incorporated by reference to the Company's Annual Report on
                      Form 10-K for the year ended December 31, 1994.
         10.2.1       1993 Stock Incentive Plan. This 1993 Stock Incentive Plan is
                      incorporated by reference to Form S-1 Registration Number
                      33-81922 of Mahaska Investment Company.
         10.2.2       1996 Stock Incentive Plan. This 1996 Stock Incentive Plan is
                      incorporated by reference to the Company's Annual Report on
                      Form 10-K for the year ended December 31, 1996.
         10.2.3       1998 Stock Incentive Plan.
         10.3.1       Midstates Resources Corp. Loan Participation and Servicing
                      Agreement dated December 9, 1992 between Midstates Resources
                      Corp., Mahaska Investment Company and Mahaska State Bank.
                      This Midstates Resources Corp. Agreement is incorporated by
                      Reference to Form S-1 Registration Number 33-81922 of
                      Mahaska Investment Company.
         10.3.2       Central States Resources Corp. Liquidation Agreement dated
                      April 18, 1988 between Central States Resources Corp.,
                      Mahaska State Bank, National Bank & Trust Co., and Randal
                      Vardaman. This Central States Resources Corp. Agreement is
                      incorporated by reference to Form S-1 Registration Number
                      33-81922 of Mahaska Investment Company.
         10.3.3       All States Resources Corp. Loan Participation and Servicing
                      Agreement dated September 13, 1993 between All States
                      Resources Corp., Mahaska Investment Company and West Gate
                      Bank. This All States Resources Corp. Agreement is
                      incorporated by reference to Form S-1 Registration Number
                      33-81922 of Mahaska Investment Company.
         10.5.1       Revolving Loan Agreement dated January 31, 1996 between
                      Mahaska Investment Company and Harris Trust and Savings
                      Bank. This Loan Agreement is incorporated herein by
                      reference to the Form 8-K report filed by Mahaska Investment
                      Company on February 29, 1996.
         10.5.2       Third Amendment to Revolving Loan Agreement and Revolving
                      Loan Note between Mahaska Investment Company and Harris
                      Trust & Savings Bank dated November 20, 1997.
         10.6         Purchase and Assumption Agreement between Boatmen's Bank
                      Iowa, National Association and Central Valley Bank dated
                      February 15, 1996. This Purchase and Assumption Agreement is
                      incorporated herein by reference to the Form 8-K report
                      filed by Mahaska Investment Company on February 29, 1996.

 
                                       18
   21
 


        EXHIBIT
        -------
                   
         11           Computation of Per Share Earnings
         13           The Annual Report to Shareholders of Mahaska Investment
                      Company for the 1997 calendar year and the Appendix to
                      the Proxy Statement for the Fiscal Year 1997.
         21           Subsidiaries
         23           Consent of Auditor
         27           Financial Data Schedule

 
     The Company will furnish to any shareholder upon request and upon payment
of a fee of $.50 per page, a copy of any exhibit. Requests for copies should be
directed to Karen K. Baack, Secretary/Treasurer, Mahaska Investment Company,
P.O. Box 1104, Oskaloosa, Iowa 52577-1104.
 
     (b) Reports on Form 8-K: No reports on Form 8-K were required to be filed
         during the last quarter of 1997.
 
                                       19
   22
 
                                   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.
 
                                                MAHASKA INVESTMENT COMPANY
                                                       (Registrant)
 
March 19, 1998                            By:     /s/ CHARLES S. HOWARD
                                            ------------------------------------
                                                     Charles S. Howard
                                            Chairman, President, Chief Executive
                                                     Officer and Director
 
     Pursuant to the requirements 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 dates indicated.
 


                    NAME                                          TITLE                          DATE
                    ----                                          -----                          ----
                                                                                      
          By: /s/ CHARLES S. HOWARD                 Director, Chairman of the Board,        March 19, 1998
   ---------------------------------------          President and Chief Executive
              Charles S. Howard                     Officer
 
          By: /s/ DAVID A. MEINERT                  Director, Executive Vice                March 19, 1998
   ---------------------------------------          President
              David A. Meinert                      and Chief Financial Officer
                                                    (Principal Accounting Officer)
 
          By: /s/ R. SPENCER HOWARD                 Director and Vice President             March 19, 1998
   ---------------------------------------          Corporate Planning
              R. Spencer Howard
 
         By: /s/ MARTIN L. BERNSTEIN                Director                                March 19, 1998
   ---------------------------------------
             Martin L. Bernstein
 
         By: /s/ ROBERT K. CLEMENTS                 Director                                March 19, 1998
   ---------------------------------------
             Robert K. Clements
 
         By: /s/ JOHN A. FALLON, III                Director                                March 19, 1998
   ---------------------------------------
             John A. Fallon, III
 
           By: /s/ JAMES F. MATHEW                  Director                                March 19, 1998
   ---------------------------------------
               James F. Mathew
 
          By: /s/ JOHN P. POTHOVEN                  Director                                March 19, 1998
   ---------------------------------------
              John P. Pothoven
 
         By: /s/ JOHN W. N. STEDDOM                 Director                                March 19, 1998
   ---------------------------------------
             John W. N. Steddom