AMERUS LIFE HOLDINGS INC
424B2, 1998-07-14
LIFE INSURANCE
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<PAGE>   1
 
THE INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT.
 
                   SUBJECT TO COMPLETION, DATED JULY 10, 1998
 
            PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED JUNE 10, 1998
 
                       AMERUS LIFE HOLDINGS, INC. LOGO
                                                 UNITS
 
                                AMERUS LIFE HOLDINGS, INC.
                                    AMERUS CAPITAL II
                       % ADJUSTABLE CONVERSION-RATE EQUITY SECURITY UNITS
                             ---------------------
    The Company is offering hereby a number of Units such that the initial
public offering price of the Units and the proceeds from the sale of Call
Options will result in gross proceeds of approximately $130,400,000. Each Unit
will have a stated amount of $         (equal to the last reported per share
sale price of the Common Stock on the NYSE on the date of this Prospectus
Supplement). Each Unit will initially consist of (a) a Purchase Contract under
which the holder will purchase from the Company on the Stock Purchase Date
of         , 2001, for cash in an amount equal to the Stated Amount, between
             of a share and one share of Common Stock (depending on the
Applicable Market Value of the Common Stock on the Stock Purchase Date, as
described herein), subject to adjustment in certain circumstances, and (b) a
Quarterly Income Preferred Security ("QUIPS"(SM)*) of the Trust having a
liquidation amount equal to the Stated Amount, a distribution rate of     % per
annum and a mandatory redemption date of                         , 2003, subject
to a Call Option granted by the holder of the Unit to the Call Option Holder
permitting the Call Option Holder to acquire the QUIPS on or before            ,
2001, in exchange for a package of consideration which will include Treasury
Securities that will provide payments matching the distribution rate referred to
above through the Stock Purchase Date and payments equal to the Stated Amount on
the Stock Purchase Date. For so long as any Purchase Contract remains in effect,
such Purchase Contract and the QUIPS or other Pledged Securities securing it
(and, for so long as the Call Option relating to such Pledged Securities is
exercisable, the obligations of the holder to the Call Option Holder thereunder)
will not be separable and may be transferred only as an integrated Unit. See
"Description of the Units".
 
    For the period from the date of issuance of the Units to the Stock Purchase
Date, each holder of a Unit (other than a Stripped Unit) will be entitled to
receive cash payments of     % of the Stated Amount per annum, payable in
arrears on the Quarterly Payment Dates of              ,              ,
             and              of each year (unless deferred as described
herein). Such payments will consist of payments on the QUIPS or other Pledged
Securities plus Contract Fees payable by the Company or net of Contract Fees
payable by the holders, as the case may be. If a holder of a Unit does not
provide cash to settle the underlying Purchase Contract in the manner described
herein on the Stock Purchase Date, cash proceeds from the QUIPS or other Pledged
Securities underlying such Unit will be applied on the Stock Purchase Date to
the purchase of Common Stock pursuant to such Purchase Contract. See
"Description of the Units".
 
    Prior to the offering made hereby there has been no public market for the
Units. Application will be made to list the Normal Units on the NYSE under the
symbol "AHB". The Common Stock is listed on the NYSE under the symbol "AMH". The
last reported sale price of the Common Stock on the NYSE on July 9, 1998 was
$32 1/4 per share.
 
    SEE "RISK FACTORS" BEGINNING ON PAGE S-15 OF THIS PROSPECTUS SUPPLEMENT AND
PAGE 13 OF THE ACCOMPANYING PROSPECTUS FOR CERTAIN CONSIDERATIONS RELEVANT TO AN
INVESTMENT IN THE UNITS.
                             ---------------------
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS SUPPLEMENT OR THE PROSPECTUS TO WHICH IT
       RELATES. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                             ---------------------
 
<TABLE>
<CAPTION>
                                    INITIAL PUBLIC OFFERING    PROCEEDS FROM SALE    UNDERWRITING     PROCEEDS TO
                                       PRICE OF UNITS(1)        OF CALL OPTIONS      DISCOUNT(2)     COMPANY(1)(3)
                                    -----------------------    ------------------    ------------    -------------
<S>                                 <C>                        <C>                   <C>             <C>
Per Unit..........................         $                        $                  $               $
Total(4)..........................         $                        $                  $               $
</TABLE>
 
- ---------------
 
(1) Plus accrued distributions on the QUIPS and plus or net of accrued Contract
    Fees, if any, from                         , 1998.
(2) The Company and the Trust have agreed to indemnify the Underwriters against
    certain liabilities, including liabilities under the Securities Act of 1933.
(3) Before deducting estimated expenses of $         payable by the Company.
(4) The Company and the Trust have granted the Underwriters an option for 30
    days with respect to an additional 15% of the Units offered, solely to cover
    over-allotments. If such option is exercised in full, the total initial
    public offering price of Units, proceeds from sale of Call Options,
    underwriting discount and proceeds to Company will be $         ,
    $         , $         and $         , respectively. See "Underwriting".
                             ---------------------
    The Units are offered severally by the Underwriters, as specified herein,
subject to receipt and acceptance by them and subject to their right to reject
any order in whole or in part. It is expected that the Units will be ready for
delivery in book entry form only through the facilities of The Depository Trust
Company in New York, New York, on or about              , 1998, against payment
therefor in immediately available funds.
- ---------------
* QUIPS is a servicemark of Goldman, Sachs & Co.
GOLDMAN, SACHS & CO.                                        SALOMON SMITH BARNEY
                             ---------------------
        The date of this Prospectus Supplement is                , 1998.
<PAGE>   2
 
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE UNITS, INCLUDING
OVER-ALLOTMENT, STABILIZING AND SHORT-COVERING TRANSACTIONS IN SUCH SECURITIES,
AND THE IMPOSITION OF A PENALTY BID, IN CONNECTION WITH THE OFFERING. FOR A
DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING".
                             ---------------------
 
     THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE IOWA
COMMISSIONER OF INSURANCE NOR HAS THE IOWA COMMISSIONER OF INSURANCE RULED UPON
THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
                             ---------------------
 
     FOR NORTH CAROLINA INVESTORS: THE COMMISSIONER OF INSURANCE OF THE STATE OF
NORTH CAROLINA HAS NOT APPROVED OR DISAPPROVED THIS OFFERING NOR HAS SUCH
COMMISSIONER RULED UPON THE ACCURACY OR THE ADEQUACY OF THE ACCOMPANYING
PROSPECTUS OR THIS PROSPECTUS SUPPLEMENT.
                             ---------------------
 
     THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 PROVIDES A SAFE HARBOR
FOR FORWARD-LOOKING STATEMENTS. A NUMBER OF MATTERS AND SUBJECT AREAS DISCUSSED
OR INCORPORATED BY REFERENCE IN THIS PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING
PROSPECTUS ARE NOT LIMITED TO HISTORICAL OR CURRENT FACTS AND DEAL WITH
POTENTIAL FUTURE CIRCUMSTANCES AND DEVELOPMENTS. FACTORS THAT MAY CAUSE ACTUAL
RESULTS TO DIFFER MATERIALLY FROM THOSE CONTEMPLATED OR PROJECTED IN SUCH
FORWARD LOOKING STATEMENTS INCLUDE, AMONG OTHERS, THE FOLLOWING POSSIBILITIES:
(I) HEIGHTENED COMPETITION, INCLUDING THE ENTRY OF NEW COMPETITORS AND THE
DEVELOPMENT OF NEW PRODUCTS BY COMPETITORS; (II) ADVERSE STATE AND FEDERAL
LEGISLATION AND REGULATION, INCLUDING INCREASES IN MINIMUM CAPITAL AND RESERVES,
AND OTHER FINANCIAL VIABILITY REQUIREMENTS AND ADDITIONAL REGULATIONS OF MUTUAL
HOLDING COMPANIES; (III) FAILURE TO DEVELOP MULTIPLE DISTRIBUTION CHANNELS IN
ORDER TO OBTAIN NEW CUSTOMERS OR FAILURE TO RETAIN EXISTING CUSTOMERS; (IV)
INABILITY TO CARRY OUT MARKETING AND SALES PLANS, INCLUDING, AMONG OTHERS,
CHANGES TO CERTAIN PRODUCTS AND ACCEPTANCE OF THE REVISED PRODUCTS IN THE
MARKET; (V) LOSS OF KEY EXECUTIVES; (VI) CHANGES IN INTEREST RATES CAUSING A
REDUCTION OF INVESTMENT INCOME; (VII) GENERAL ECONOMIC AND BUSINESS CONDITIONS
WHICH ARE LESS FAVORABLE THAN EXPECTED; (VIII) UNANTICIPATED CHANGES IN INDUSTRY
TRENDS; (IX) INACCURACIES IN ASSUMPTIONS REGARDING FUTURE MORBIDITY,
PERSISTENCY, MORTALITY AND INTEREST RATES USED IN CALCULATING RESERVE AMOUNTS;
(X) ADVERSE CHANGES IN RATINGS ASSIGNED BY RATING AGENCIES; (XI) CHANGES IN TAX
LAWS WHICH NEGATIVELY AFFECT DEMAND FOR THE COMPANY'S PRODUCTS; (XII) THE RISK
FACTORS OR UNCERTAINTIES LISTED HEREIN OR LISTED FROM TIME TO TIME IN THIS
PROSPECTUS SUPPLEMENT, THE ACCOMPANYING PROSPECTUS OR ANY DOCUMENT INCORPORATED
BY REFERENCE HEREIN; AND (XIII) WITH RESPECT TO COST SAVINGS THAT ARE EXPECTED
TO BE REALIZED FROM, AND COSTS ASSOCIATED WITH, THE RECENT ACQUISITIONS OF DELTA
LIFE CORPORATION ("DELTA") AND AMVESTORS FINANCIAL CORPORATION ("AMVESTORS"),
THE FOLLOWING POSSIBILITIES: (A) THE EXPECTED COST SAVINGS TO BE REALIZED
THROUGH COMBINING CERTAIN FUNCTIONS OF THE COMPANY, DELTA AND AMVESTORS TO
ELIMINATE REDUNDANCIES AND BETTER SERVE THE COMBINED COMPANY'S CUSTOMERS, AND
REDUCTIONS IN STAFF CANNOT BE FULLY REALIZED BECAUSE THE CHANGES ARE NOT MADE OR
UNANTICIPATED ADDED COSTS ARE INCURRED; AND (B) COSTS OR DIFFICULTIES RELATED TO
THE INTEGRATION OF THE BUSINESSES OF DELTA AND AMVESTORS WITH THE COMPANY'S
OTHER BUSINESSES ARE GREATER THAN EXPECTED. A VARIETY OF FACTORS COULD CAUSE THE
COMPANY'S ACTUAL RESULTS TO DIFFER MATERIALLY FROM THE EXPECTED RESULTS
EXPRESSED IN THE COMPANY'S FORWARD-LOOKING STATEMENTS, INCLUDING THOSE SET FORTH
IN THE RISK FACTORS AND ELSEWHERE IN THIS PROSPECTUS SUPPLEMENT, THE
ACCOMPANYING PROSPECTUS OR THE DOCUMENTS INCORPORATED BY REFERENCE HEREIN.
                                       S-2
<PAGE>   3
 
                               PROSPECTUS SUMMARY
 
OVERVIEW
 
     AmerUs Life Holdings, Inc. (the "Company") is an insurance holding company
engaged through its subsidiaries in the business of marketing, underwriting and
distributing a broad range of individual life insurance and annuity products to
individuals and businesses in 49 states, the District of Columbia and the U.S.
Virgin Islands. The Company's primary product offerings consist of whole life,
universal life and term life insurance policies and fixed annuities. As of March
31, 1998, the Company had approximately 567,000 life insurance policies and
annuity contracts outstanding and individual life insurance in force, net of
reinsurance, of approximately $26.9 billion with life insurance reserves of $2.4
billion and annuity reserves of $5.9 billion. As of March 31, 1998, the Company
had total assets of $10.4 billion and total shareholders' equity of $944.6
million. See "The Company", "Organizational Structure" and "Business" in the
accompanying Prospectus for a more detailed description of the Company.
 
RECENT ACQUISITIONS
 
     The Company made two major acquisitions in 1997. The Company acquired Delta
Life Corporation ("Delta") on October 23 for approximately $165 million in cash
and AmVestors Financial Corporation ("AmVestors") on December 19 in a stock
exchange valued at approximately $350 million. Both Delta and AmVestors
specialize in the sale of fixed annuity products, thus strengthening the
Company's presence in the rapidly growing asset accumulation and retirement
savings markets. The acquisitions, along with the growth of AmerUs Life
Insurance Company ("AmerUs Life"), increased the Company's assets from $4.4
billion at March 31, 1997 to $10.4 billion at March 31, 1998.
 
                              RECENT DEVELOPMENTS
 
REFINANCING PLAN
 
     On April 16, 1998, the Company announced a refinancing plan (the
"Refinancing Plan") that includes this offering of Units (the "Units Offering")
and an offering of $125 million of debt securities (the "Notes Offering," and
together with this Units Offering, the "Offerings"). On June 16, 1998, the
Company issued $125 million aggregate principal amount of its 6.95% Senior Notes
due 2005 (the "Senior Notes"). Proceeds from the Notes Offering were used to
partially repay the outstanding balance of $250 million on the Company's
revolving bank debt (the "Bank Debt"). Proceeds from the Units Offering will be
used to repay the remaining Bank Debt, to partially fund a buyback of up to $75
million of the Company's Class A Common Stock (the "Stock Repurchase Plan") and
for general corporate purposes.
 
RECENT RATINGS ACTIONS
 
     Certain ratings agencies have recently reviewed the ratings assigned to the
Company and its life insurance subsidiaries. On April 14, 1998, Standard &
Poor's Ratings Service reaffirmed its single-A insurer financial strength rating
for AmerUs Life, while on May 1, 1998, Moody's Investors Service Inc.
("Moody's") downgraded AmerUs Life's financial strength rating to A3 from A2. At
the same time, Moody's reaffirmed the long-term credit ratings of the Company at
Ba1 for the Company's junior subordinated debt and at Baa3 for the preferred
stock rating of AmerUs Capital I and upgraded the insurance financial strength
rating of AmVestor's subsidiary, American Investors Life Insurance Company, to
Baa1 from Baa3. In addition, Moody's assigned an A3 insurance financial strength
rating to Delta's life insurance subsidiary, Delta Life and Annuity Company.
Moody's warned that the outlook on all the debt, preferred stock and insurance
financial strength ratings remained negative, given the Company's aggressive
strategy of rapid growth through acquisitions. See "Risk Factors -- Importance
of Ratings" in the prospectus to which this Prospectus Supplement relates (the
"Prospectus").
 
                                       S-3
<PAGE>   4
 
                                   THE TRUST
 
     AmerUs Capital II (the "Trust") is a statutory business trust created under
the laws of the State of Delaware pursuant to (i) a declaration of trust, dated
as of April 14, 1998, executed by the Company, as sponsor (the "Sponsor"), and
certain of the trustees of the Trust (the "Issuer Trustees") and (ii) the filing
of a certificate of trust with the Secretary of State of the State of Delaware
on April 14, 1998. Such declaration of trust will be amended and restated in its
entirety (as so amended and restated, the "Declaration") substantially in the
form filed as an exhibit to the Registration Statement to which this Prospectus
Supplement relates. The Declaration will be qualified as an indenture under the
Trust Indenture Act of 1939, as amended (the "Trust Indenture Act"). The Trust
exists for the exclusive purposes of (i) issuing the Trust Securities (as
defined herein) representing undivided beneficial interests in the assets of the
Trust, (ii) investing the proceeds of the Trust Securities in the Junior
Subordinated Debentures (as defined herein) and (iii) engaging in only those
other activities necessary or incidental thereto. Accordingly, the Junior
Subordinated Debentures will be the sole assets of the Trust and payments under
the Junior Subordinated Debentures will be the sole revenue of the Trust. All of
the Common Trust Securities (as defined herein) will be directly or indirectly
owned by the Company.
 
                                  THE OFFERING
 
THE UNITS
 
Securities Offered.........  Adjustable Conversion-rate Equity Security Units
                             (the "Units", as more fully defined below).
 
Issuers....................  AmerUs Life Holdings, Inc. (the "Company") and
                             AmerUs Capital II (the "Trust").
 
Stated Amount..............  $     per Unit (the "Stated Amount").
 
Payments on the Units......  For the period from the date of issuance of the
                             Units to the Stock Purchase Date (as defined
                             herein), each holder of a Unit (other than a
                             Stripped Unit (as defined herein)) will be entitled
                             to receive cash payments of      % of the Stated
                             Amount per annum, payable in arrears. Such payments
                             will consist of payments on the QUIPS (as defined
                             herein) or other Pledged Securities (as defined
                             herein) plus Contract Fees (as defined herein)
                             payable by the Company or net of Contract Fees
                             payable by the holders, as the case may be. See
                             "Description of the Units -- Description of the
                             QUIPS -- Distributions".
 
Quarterly Payment Dates....                 ,                ,
                             and                of each year (the "Quarterly
                             Payment Dates"), subject to the deferral provisions
                             described below.
 
Stock Purchase Date........                             , 2001 (the "Stock
                             Purchase Date").
 
Settlement.................  On the Stock Purchase Date, a holder of Units
                             shall, in order to settle the underlying Purchase
                             Contracts, provide cash in the manner described
                             herein. The Common Stock purchased and the Pledged
                             Securities securing such Purchase Contracts (or, in
                             the case of Treasury Securities, the proceeds from
                             such Treasury Securities, net of any unpaid
                             Contract Fees payable by the holder accrued thereon
                             to the Stock Purchase Date) would then be delivered
                             to the holder.
 
                                       S-4
<PAGE>   5
 
                             If a holder of Units fails to provide cash for
                             settlement of the underlying Purchase Contracts on
                             the Stock Purchase Date, then (a) if QUIPS (or
                             Junior Subordinated Debentures) underlie such
                             Units, the Collateral Agent will, on behalf of the
                             holder, exercise the Junior Subordinated Debenture
                             Put Option (as defined herein) with respect
                             thereto; and (b) a portion of the proceeds from the
                             exercise of the Junior Subordinated Debenture Put
                             Option (or, if Treasury Securities rather than
                             QUIPS or Junior Subordinated Debentures underlie
                             such Units, a portion of the proceeds from such
                             securities) will be applied to satisfy in full the
                             holder's obligations under such Purchase Contracts
                             and the remainder of such proceeds, if any, will be
                             paid to the holder.
 
Settlement Rate............  The number of shares of Common Stock issuable upon
                             settlement of each Purchase Contract (the
                             "Settlement Rate") will be between
                             of a share and one share of Common Stock (subject
                             to adjustment under certain circumstances). More
                             specifically, the Settlement Rate will be
                             calculated as follows, subject to adjustment in
                             certain circumstances:
 
                             (a) if the Applicable Market Value (as defined
                             herein) is greater than or equal to $          (the
                             "Threshold Appreciation Price") (i.e.,
                             approximately      % higher than the Stated
                             Amount), the Settlement Rate will be
                                            ;
 
                             (b) if the Applicable Market Value is less than the
                             Threshold Appreciation Price but greater than the
                             Stated Amount, the Settlement Rate will equal the
                             Stated Amount divided by the Applicable Market
                             Value (i.e., the Settlement Rate will be calculated
                             so that the Applicable Market Value of the Common
                             Stock purchasable under each Purchase Contract
                             would equal the Stated Amount payable therefor);
                             and
 
                             (c) if the Applicable Market Value is less than or
                             equal to the Stated Amount, the Settlement Rate
                             will be one.
 
                             "Applicable Market Value" means the average of the
                             Closing Prices (as defined herein) per share of
                             Common Stock on each of the twenty consecutive
                             Trading Days (as defined herein) ending on the last
                             Trading Day immediately preceding the Stock
                             Purchase Date.
 
                             The following table illustrates the applicable
                             Settlement Rate and approximate market value of the
                             Common Stock receivable upon
 
                                       S-5
<PAGE>   6
 
                             settlement of the Units at certain assumed
                             Applicable Market Values:
 
<TABLE>
<CAPTION>
                                       ---------------------------------------------------------------
                                                              NUMBER OF SHARES     VALUE OF SHARES
                                         IF THE APPLICABLE    RECEIVED PER UNIT   RECEIVED PER UNIT
                                          MARKET VALUE IS      UPON SETTLEMENT    UPON SETTLEMENT(1)
                                       ---------------------------------------------------------------
                                       <S>                    <C>               <C>
                                            $  per share                                  $
                                       (i.e., 150% of Stated                     (i.e.,   % of Stated
                                               Amount)                                 Amount)
                                       ---------------------------------------------------------------
                                            $  per share                                  $
                                          (i.e., Threshold                      (i.e., Stated Amount)
                                         Appreciation Price)
                                       ---------------------------------------------------------------
                                            $  per share                                  $
                                       (i.e., 1/2 way between                   (i.e., Stated Amount)
                                          Stated Amount and
                                              Threshold
                                         Appreciation Price)
                                       ---------------------------------------------------------------
                                            $  per share            1.0                   $
                                       (i.e., Stated Amount)                    (i.e., Stated Amount)
                                       ---------------------------------------------------------------
                                            $  per share            1.0                   $
                                        (i.e., 50% of Stated                     (i.e., 50% of Stated
                                               Amount)                                 Amount)
                                       ---------------------------------------------------------------
</TABLE>
 
                             --------------------------------------------
                             (1) Assumes that Applicable Market Value accurately
                                 reflects fair market value on the Stock
                                 Purchase Date.
 
Relationship of Units to
  Common Stock.............  Cash payments on the Units that are not Stripped
                             Units (as defined herein) (consisting of payments
                             on the QUIPS plus or net of Contract Fees) will
                             accrue at a rate per annum that is greater than the
                             current dividend yield on the Common Stock.
                             However, since the number of shares of Common Stock
                             issuable upon settlement of each Purchase Contract
                             may decline by up to approximately      % as the
                             Applicable Market Value increases, the opportunity
                             for equity appreciation afforded by an investment
                             in the Units is less than that afforded by a direct
                             investment in the Common Stock.
 
Components of the Units....  Each Unit will initially consist of:
 
                             (a) a purchase contract ("Purchase Contract") under
                             which (i) the holder will purchase from the Company
                             on the Stock Purchase Date, for cash in an amount
                             equal to the Stated Amount, a number of shares of
                             Common Stock equal to the Settlement Rate, and (ii)
                             contract fees ("Contract Fees") will be payable at
                             the rate of      % of the Stated Amount per annum
                             (the "Contract Fee Rate") as described below, and
                             (b) a Quarterly Income Preferred Security
                             ("QUIPS"(SM), which term may refer to a single
                             security or more than one security as the context
                             may require) of the Trust having a liquidation
                             amount equal to the Stated Amount, a distribution
                             rate of      % of the Stated Amount per annum and
                                       S-6
<PAGE>   7
 
                             a mandatory redemption date of          , 2003 (the
                             "QUIPS and Debenture Maturity Date"), subject to a
                             call option ("Call Option") granted by the holder
                             of the Unit to Goldman, Sachs & Co. (in its
                             capacity as the holder of the Call Options, and
                             together with any transferee of the Call Options in
                             such capacity, the "Call Option Holder") that (when
                             aggregated with the Call Options underlying all
                             other Units) will entitle the Call Option Holder to
                             acquire the QUIPS underlying the Units (or the
                             Junior Subordinated Debentures substituted
                             therefor), on or before the last Quarterly Payment
                             Date prior to the Stock Purchase Date (or, if such
                             date is not a Trading Day, the next succeeding
                             Trading Day) (the "Call Option Expiration Date"),
                             in exchange for a package of consideration (the
                             "Aggregate Call Option Exercise Consideration")
                             which will include U.S. Treasury Strips, U.S.
                             Treasury Bills or other U.S. Treasury Securities
                             (any of the foregoing being referred to herein as
                             "Treasury Securities") that will provide payments
                             matching the aggregate distributions due on such
                             QUIPS (or interest due on such Junior Subordinated
                             Debentures if such Junior Subordinated Debentures
                             have been substituted for such QUIPS) through the
                             Stock Purchase Date (assuming for this purpose,
                             even if not true, that the distribution or interest
                             rate thereon remains as set forth above) and
                             Treasury Securities that will provide payments
                             equal to the aggregate Stated Amount of such Units
                             on the Stock Purchase Date.
 
                             The QUIPS underlying a Unit will be pledged to The
                             Chase Manhattan Bank, as collateral agent for the
                             Company and the Call Option Holder (together with
                             any successor thereto in such capacity, the
                             "Collateral Agent"), to secure the holder's
                             obligations to the Company and the Call Option
                             Holder under the Purchase Contract and Call Option
                             underlying such Unit. The QUIPS, or any securities
                             substituted therefor as securities pledged to the
                             Collateral Agent to secure such obligations, are
                             herein referred to as "Pledged Securities". If
                             Treasury Securities are exchanged for Pledged
                             Securities upon exercise of the Call Options or
                             Junior Subordinated Debentures are distributed in
                             respect of Pledged Securities upon dissolution of
                             the Trust, the Treasury Securities so exchanged or
                             the Junior Subordinated Debentures so distributed
                             will automatically be substituted as Pledged
                             Securities in place of the securities that
                             theretofore had been Pledged Securities.
 
                             The obligations of the holders of Units under the
                             Purchase Contracts, if not paid in cash by such
                             holders, will be funded out of payments made in
                             respect of the Pledged Securities. For so long as a
                             Purchase Contract remains in effect, such Purchase
                             Contract and the QUIPS or other Pledged Securities
                             securing it (and, for so long as a Call Option
                             relating to such Pledged Securities is exercisable,
                             the obligations of the holder to the Call Option
                             Holder thereunder) will not be separable and may be
                             transferred only as an integrated Unit.
 
Formation of the Units.....  At the closing of the offering made hereby, the
                             Underwriters specified herein (the "Underwriters")
                             will (a) enter into Purchase
 
                                       S-7
<PAGE>   8
 
                             Contracts with the Company and (b) purchase QUIPS
                             from the Trust for cash. The Underwriters will fund
                             that cash in part by the sale of the Units offered
                             hereby to the initial investors thereof and in part
                             by the sale of Call Options (on behalf of such
                             initial investors) to the Call Option Holder. The
                             Trust will use that cash to purchase Junior
                             Subordinated Debentures from the Company. The QUIPS
                             will then be pledged to the Collateral Agent as
                             contemplated above.
 
                             The rights to purchase Common Stock under a
                             Purchase Contract, together with the QUIPS or other
                             Pledged Securities pledged to secure the
                             obligations referred to in (a) and (b) below,
                             subject to (a) the obligations owed to the Company
                             under such Purchase Contract, (b) the obligations
                             owed to the Call Option Holder under the Call
                             Option relating to such QUIPS or other Pledged
                             Securities (which, in the case of Normal Units, can
                             only be Junior Subordinated Debentures) and (c) the
                             pledge arrangements securing the foregoing
                             obligations, are collectively referred to herein as
                             a "Normal Unit".
 
                             Each holder of Normal Units will have the right to
                             substitute, as Pledged Securities, Treasury
                             Securities that will generate payments matching
                             such holder's obligations under the underlying
                             Purchase Contracts, in return for the securities
                             that theretofore had been the Pledged Securities
                             underlying such Normal Units. For so long as the
                             Call Options underlying such Normal Units remain
                             exercisable, such right of substitution may be
                             exercised only if the holder obtains an instrument
                             from the Call Option Holder releasing its security
                             interest in the Pledged Securities securing such
                             Call Options and agreeing that such Call Options no
                             longer underlie such Normal Units (or the Stripped
                             Units they become). The holder might obtain such an
                             instrument by separately documenting such Call
                             Options with the Call Option Holder (and, if
                             required by the Call Option Holder, entering into
                             credit support arrangements satisfactory to the
                             Call Option Holder backing such Call Options),
                             paying the Call Option Holder to cancel such Call
                             Options or otherwise. However, the Call Option
                             Holder will be under no obligation to deliver such
                             an instrument, and there can be no assurance that a
                             holder will be able to induce the Call Option
                             Holder to do so. Therefore, investors may not be
                             able to capitalize on any appreciation of the QUIPS
                             through this means.
 
                             Goldman, Sachs & Co. have advised the Company that,
                             while they are the Call Option Holder, they will
                             evaluate requests to release their security
                             interests in the Pledged Securities on a case-by-
                             case basis, taking into account the market value of
                             the Pledged Securities as compared to the cost to
                             the Call Option Holder of exercising the Call
                             Options, the availability and amount of credit
                             support, any payments to be made in connection
                             therewith and other factors pertaining at the time
                             of any requested release. In doing so, Goldman,
                             Sachs & Co. would expect that they would not grant
                             such a request unless the value of the payments and
                             other new rights offered by the holder were no less
                             valuable to
 
                                       S-8
<PAGE>   9
 
                             Goldman, Sachs & Co. than the rights they had
                             before granting such request.
 
                             If a holder of Normal Units exercises such holder's
                             right to substitute Treasury Securities as Pledged
                             Securities in the manner described herein, the
                             securities that theretofore had been the Pledged
                             Securities underlying such Normal Units will be
                             released from the pledge arrangement described
                             herein and delivered to such holder, and such
                             holder's remaining rights and obligations under
                             such Normal Units will thereupon become "Stripped
                             Units" that will no longer generate cash payments
                             to such holder (other than Contract Fees, if any,
                             payable by the Company pursuant to the underlying
                             Purchase Contracts) and will no longer be listed on
                             the New York Stock Exchange ("NYSE") or be fungible
                             with Normal Units.
 
                             The Normal Units and any Stripped Units are
                             collectively referred to herein as the "Units."
 
Contract Fees..............  The holders of Units may be required to pay
                             Contract Fees to the Company, or the Company may be
                             required to pay Contract Fees to the holders of
                             Units, as specified in the final Prospectus
                             Supplement for the offering made hereby.
 
                             Any obligation of the holders of Units to pay
                             Contract Fees to the Company will be funded out of
                             payments made in respect of the Pledged Securities.
                             If payments made in respect of the Pledged
                             Securities are insufficient to cover the obligation
                             of the holders of the Units to pay Contract Fees,
                             such obligation will be deferred until the earlier
                             of the date sufficient cash is available and the
                             Stock Purchase Date.
 
                             Any obligation of the Company to pay Contract Fees
                             to the holders of Units will be unsecured and
                             junior in right of payment to all Senior
                             Indebtedness (as defined herein) of the Company.
                             The Company will generally have the right to defer
                             the payment of Contract Fees at any time or from
                             time to time for a period not extending beyond the
                             Stock Purchase Date.
 
                             Any deferred Contract Fees payable by the holders
                             of Units or the Company will bear additional
                             Contract Fees at the rate of      % per annum plus,
                             for the period after the Call Option Expiration
                             Date, the amount (if any) by which the interest
                             rate on the Junior Subordinated Debentures shall
                             have been increased (as described herein) (the
                             "Deferral Rate") (compounding on each succeeding
                             Quarterly Payment Date) until paid.
 
Termination................  The Purchase Contracts (including the right to
                             receive and the obligation to pay accrued or
                             deferred Contract Fees and the right and obligation
                             to purchase Common Stock) will automatically
                             terminate upon the occurrence of certain events of
                             bankruptcy, insolvency or reorganization with
                             respect to the Company. Upon such termination, the
                             Call Options will terminate and the Collateral
                             Agent will release the Pledged Securities held by
                             it to the Unit Agent for distribution to the
                             holders.
 
                                       S-9
<PAGE>   10
 
THE QUIPS
 
The Trust..................  The QUIPS will be issued by the Trust, a Delaware
                             statutory business trust. The Junior Subordinated
                             Debentures due                , 2003 (the "Junior
                             Subordinated Debentures") of the Company will be
                             the sole assets of the Trust, and payments on those
                             Junior Subordinated Debentures will be the sole
                             revenue of the Trust. The Company will own all of
                             the common undivided beneficial interests in the
                             assets of the Trust (the "Common Trust Securities"
                             and, collectively with the QUIPS, the "Trust
                             Securities").
 
The QUIPS..................  The QUIPS will represent preferred undivided
                             beneficial interests in the assets of the Trust.
                             Each QUIPS will have a Liquidation Amount (as
                             defined in the Declaration) equal to the Stated
                             Amount. Distributions on the QUIPS will be
                             cumulative, will accrue from the first date of
                             issuance of the QUIPS at an initial rate of   % per
                             annum (such rate, as it may be increased in the
                             manner described herein, the "QUIPS and Debenture
                             Rate") as applied to the Liquidation Amount thereof
                             and will be payable quarterly in arrears on each
                             Quarterly Payment Date, subject to the deferral
                             provisions described below. The QUIPS will be
                             mandatorily redeemable in whole on the QUIPS and
                             Debenture Maturity Date of                , 2003,
                             at a redemption price equal to the aggregate
                             Liquidation Amount thereof plus unpaid
                             distributions accrued thereon to such date, out of
                             the proceeds of the repayment of the Junior
                             Subordinated Debentures at maturity.
 
Junior Subordinated
  Debentures...............  The Junior Subordinated Debentures will be issued
                             by the Company under an indenture (the "Indenture")
                             between First Union National Bank, as trustee
                             (together with any successor thereto in such
                             capacity, the "Debenture Trustee"), and the
                             Company, in an aggregate principal amount equal to
                             the aggregate Liquidation Amount of the Trust
                             Securities. Interest on the Junior Subordinated
                             Debentures will accrue from the first date of
                             issuance of the Junior Subordinated Debentures at a
                             rate per annum equal to the QUIPS and Debenture
                             Rate referred to above and will be payable
                             quarterly in arrears on each Quarterly Payment
                             Date, subject to the rate increase and deferral
                             provisions described below. The Junior Subordinated
                             Debentures will mature on the QUIPS and Debenture
                             Maturity Date and will not be redeemable at the
                             option of the Company prior to such date. The
                             Junior Subordinated Debentures will be unsecured
                             and junior in right of payment to all Senior
                             Indebtedness of the Company.
 
                             On the Call Option Expiration Date, a nationally
                             recognized investment banking firm chosen by the
                             Company (the "Rate Increase Agent") will determine
                             whether the then current aggregate market value of
                             the QUIPS (or, if the QUIPS are no longer
                             outstanding, Junior Subordinated Debentures)
                             underlying the Normal Units is at least equal to
                             100.25% of the Cash Equivalent of the Aggregate
                             Call Option Exercise Consideration (as defined
                             herein). If the Rate Increase Agent determines that
                             it is (or the QUIPS and
 
                                      S-10
<PAGE>   11
 
                             Debenture Rate is already equal to or greater than
                             the Maximum QUIPS and Debenture Rate (as defined
                             herein)), interest on the Junior Subordinated
                             Debentures (and, if the QUIPS remain outstanding,
                             distributions on the QUIPS) will continue to accrue
                             at the initial QUIPS and Debenture Rate. If the
                             Rate Increase Agent determines that it is not (and
                             the QUIPS and Debenture Rate is less than the
                             Maximum QUIPS and Debenture Rate), the Rate
                             Increase Agent will select an increased rate equal
                             to the lower of (a) the rate that it determines is
                             sufficient to cause the then current aggregate
                             market value of such QUIPS (or, if the QUIPS are no
                             longer outstanding, such Junior Subordinated
                             Debentures) to be at least equal to 100.25% of the
                             Cash Equivalent of the Aggregate Call Option
                             Exercise Consideration and (b) the Maximum QUIPS
                             and Debenture Rate, and the QUIPS and Debenture
                             Rate will thereupon become that increased rate. See
                             "Description of the Junior Subordinated Debentures
                             -- Market Rate Increase".
 
Interest and QUIPS
  Distribution Deferral
  Provisions...............  The Company will generally have the right to defer
                             the payments of interest on the Junior Subordinated
                             Debentures at any time or from time to time for a
                             period not extending beyond the QUIPS and Debenture
                             Maturity Date. Upon any such deferral, quarterly
                             distributions on the QUIPS by the Trust will be
                             deferred. However, deferred payments of interest on
                             the Junior Subordinated Debentures and deferred
                             distributions on the QUIPS will bear additional
                             interest or distributions at a rate per annum equal
                             to the Deferral Rate (compounding on each
                             succeeding Quarterly Payment Date) until paid.
 
Junior Subordinated
  Debenture Put Options....  Each holder of Junior Subordinated Debentures will
                             have the right to require the Company to repurchase
                             such Junior Subordinated Debentures, in whole or in
                             part, on the Stock Purchase Date, for a purchase
                             price equal to the aggregate principal amount of
                             such Junior Subordinated Debentures plus unpaid
                             interest accrued thereon to the Stock Purchase
                             Date, but only if the cash received on the exercise
                             of such option is used to settle the Purchase
                             Contracts secured thereby. See "Description of the
                             Units -- Description of the Junior Subordinated
                             Debentures -- Junior Subordinated Debenture Put
                             Option".
 
                             Each holder of QUIPS will have the option to
                             require the Trust to distribute the underlying
                             Junior Subordinated Debentures to the Put Agent (as
                             defined herein), on the Stock Purchase Date, in
                             exchange for such QUIPS, in connection with the
                             concurrent exercise by the Put Agent on behalf of
                             such holder of the Junior Subordinated Debenture
                             Put Option related thereto as described above.
 
Exchange of QUIPS for
Junior Subordinated
  Debentures...............  The Company will have the right at any time to
                             terminate the Trust and cause the Junior
                             Subordinated Debentures to be distributed to the
                             holders of the QUIPS and Common Trust Securities in
                             liquidation of the Trust.
 
                                      S-11
<PAGE>   12
 
The Guarantee..............  Pursuant to a guarantee agreement (the "Guarantee")
                             between the Company and First Union National Bank,
                             as trustee (together with any successor thereto in
                             such capacity, the "Guarantee Trustee"), the
                             Company will guarantee the payment of distributions
                             and other payments on the QUIPS to the extent that
                             the Trust has funds on hand sufficient therefor.
 
GENERAL
 
Listing....................  Application will be made to list the Normal Units
                             on the NYSE.
 
Federal Income Tax
  Consequences.............  In general, holders of the Units will be subject to
                             federal income tax on the accrual of original issue
                             discount in respect of the Units and upon
                             disposition of the Units (including disposition
                             pursuant to exercise of the Call Option). For a
                             discussion of the United States federal income tax
                             consequences associated with the purchase,
                             ownership, and disposition of the Units, QUIPS,
                             Purchase Contracts and Common Stock, see "Certain
                             Federal Income Tax Consequences". Prospective
                             investors should be aware that no statutory,
                             judicial or administrative authority directly
                             addresses the tax treatment of Units or instruments
                             similar to Units for United States federal income
                             tax purposes. ACCORDINGLY, PROSPECTIVE INVESTORS
                             ARE URGED TO CONSULT THEIR TAX ADVISORS CONCERNING
                             THE TAX CONSEQUENCES OF AN INVESTMENT IN THE UNITS,
                             INCLUDING THE APPLICATION OF STATE, LOCAL AND
                             FOREIGN OR OTHER TAX LAWS AND THE POSSIBLE EFFECTS
                             OF CHANGES IN FEDERAL OR OTHER TAX LAWS.
 
Use of Proceeds............  The Company intends to use the net proceeds of the
                             offering made hereby to repay the Bank Debt, to
                             partially fund the Stock Repurchase Plan and for
                             general corporate purposes. See "Use of Proceeds".
 
                                      S-12
<PAGE>   13
 
               SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA
 
     The following table sets forth certain consolidated financial and operating
data of the Company. The selected consolidated financial and operating data
below for the three-month periods ended March 31, 1997 and 1998 are derived from
unaudited interim financial statements of the Company incorporated by reference
in this Prospectus. In the opinion of management, such unaudited interim
financial statements include all adjustments (consisting only of normal
recurring accruals) necessary for a fair, consistent presentation, in accordance
with generally accepted accounting principles ("GAAP"), of such information. The
selected consolidated financial and operating data for the three months ended
March 31, 1998 are not necessarily indicative of the Company's results for any
future interim period or the entire year. During the fourth quarter of 1997, the
Company acquired Delta and AmVestors in transactions that were accounted for
using the purchase method of accounting. As a result, only the Consolidated
Income Statement Data and the Consolidated Balance Sheet Data as of or for the
three-month period ended March 31, 1998 include the results of Delta and
AmVestors.
 
<TABLE>
<CAPTION>
                                                                 AS OF OR FOR THE
                                                                THREE MONTHS ENDED
                                                                    MARCH 31,
                                                                   (UNAUDITED)
                                                              ----------------------
                                                               1998(A)        1997
                                                              ---------     --------
                                                              (DOLLARS IN MILLIONS,
                                                              EXCEPT PER SHARE DATA)
<S>                                                           <C>           <C>
CONSOLIDATED INCOME STATEMENT DATA:
Revenues:
  Insurance premiums........................................  $    17.3     $    8.2
  Product charges...........................................       16.4         11.2
  Net investment income.....................................      133.1         50.9
  Realized gains on investments.............................        6.2          5.2
  Contribution from the Closed Block........................        9.0          9.3
                                                              ---------     --------
        Total revenues......................................      182.0         84.8
                                                              ---------     --------
Benefits and expenses:
  Total policyowner benefits................................      107.3         45.5
  Total expenses............................................       36.2         16.1
  Dividends to policyowners.................................        0.3          0.1
                                                              ---------     --------
        Total benefits and expenses.........................      143.8         61.7
                                                              ---------     --------
Income from operations......................................       38.2         23.1
Interest expense............................................        6.7          3.0
                                                              ---------     --------
Income before income tax expense and equity in earnings of
  unconsolidated subsidiary.................................       31.5         20.1
Income tax expense..........................................       10.1          5.7
                                                              ---------     --------
Income before equity in earnings of unconsolidated
  subsidiary................................................       21.4         14.4
Equity in earnings of unconsolidated subsidiary.............        0.4          0.2
                                                              ---------     --------
Net income..................................................  $    21.8     $   14.6
                                                              =========     ========
Earnings per common share(B)
  Basic.....................................................  $    0.63     $   0.63
  Diluted...................................................       0.62         0.63
Dividends declared per common share.........................       0.10           --
Ratios of earnings to fixed charges(C)(D)...................       1.39x        2.11x
CONSOLIDATED BALANCE SHEET DATA:
Total invested assets.......................................  $ 7,775.7     $2,864.1
Total assets................................................   10,354.9      4,412.0
Total liabilities...........................................    9,324.3      3,822.4
Company-obligated mandatorily redeemable preferred
  securities................................................       86.0         86.0
Total stockholders' equity(E)...............................      944.6        503.6
OTHER OPERATING DATA:
Adjusted operating income(F)................................  $    19.5     $   11.6
Adjusted operating income per common share (basic and
  diluted)(F)...............................................       0.56         0.50
Individual life insurance in force, net of reinsurance......     26,935       25,735
Life insurance reserves.....................................      2,369        2,065
Annuity reserves............................................      5,930        1,323
Number of employees.........................................        710          405
STATUTORY DATA:
Premiums and deposits:
  Individual life...........................................  $    84.9     $   81.6
  Annuities.................................................      173.7         12.4
</TABLE>
 
- ---------------
 
(A) Consolidated Income Statement Data includes the results for Delta and
    AmVestors for the three-month period ended March 31, 1998, and Consolidated
    Balance Sheet Data includes period-end data for Delta and AmVestors as of
    March 31, 1998.
 
                                      S-13
<PAGE>   14
 
(B) Basic earnings per common share for the first quarter of 1998 is calculated
    using 29.73 million weighted average shares of Class A Common Stock and 5
    million shares of Class B Common Stock outstanding. Diluted earnings per
    common share for the first quarter of 1998 is calculated using 29.83 million
    weighted average shares of Class A Common Stock and 5 million shares of
    Class B Common Stock outstanding. The basic and diluted earnings per common
    share for the first quarter of 1997 are calculated using 18.16 million
    shares of Class A Common Stock and 5 million shares of Class B Common Stock
    outstanding.
 
(C) For purposes of computing the ratio of earnings to fixed charges, "earnings"
    consist of income from operations before federal income taxes, fixed charges
    and pre-tax earnings required to cover preferred stock dividend
    requirements. "Fixed charges" consist of interest expense on debt and
    capital securities, amortization of debt expense and interest credited on
    deferred annuities.
 
(D) Since the Company currently has no preferred stock outstanding, the ratio of
    earnings to fixed charges and preferred stock dividends is the same as the
    ratio of earnings to fixed charges.
 
(E) Amounts shown include the effects of reporting fixed maturity securities at
    fair value and recording the unrealized appreciation or depreciation on such
    securities as a component of stockholders' equity, net of tax and other
    adjustments. Such adjustments are in accordance with Statement of Financial
    Accounting Standards 115, "Accounting for Certain Investments in Debt and
    Equity Securities," which the Company adopted December 31, 1993.
 
(F) Adjusted operating income reflects net income adjusted to eliminate certain
    items (net of applicable income taxes) which management believes are not
    necessarily indicative of overall operating trends. For example, net
    realized capital gains or losses on investments, excluding gains or losses
    on convertible debt which are considered core earnings, are eliminated.
    Different items are likely to occur in each period presented and others may
    have different opinions as to which items may warrant adjustment. The
    adjusted operating income shown does not constitute net income computed in
    accordance with GAAP. See "Management's Discussion and Analysis of Results
    of Operations and Financial Condition -- Adjusted Operating Income" in the
    accompanying Prospectus.
 
                                      S-14
<PAGE>   15
 
                                  RISK FACTORS
 
     Before purchasing any of the Units offered hereby, prospective purchasers
of Units should consider, in addition to the other information with respect to
the Company and its business contained herein or in the Prospectus or
incorporated herein by reference, the following risk factors, as well as those
in the Prospectus.
 
RISK OF DECLINE IN EQUITY VALUE
 
     The market value of the Common Stock receivable upon settlement of the
Purchase Contracts may be materially different than the purchase price payable
for such Common Stock. If the Applicable Market Value of the Common Stock on the
Stock Purchase Date is less than the Stated Amount (i.e., less than the Closing
Price of the Common Stock on the date of this Prospectus Supplement), each
holder of Units will, on the Stock Purchase Date, be required to purchase shares
of Common Stock for an amount greater than the aggregate Applicable Market Value
of such shares. Accordingly, a holder of Units assumes the risk that the market
value of the Common Stock may decline, and such decline could be substantial.
See "Prospectus Summary -- Settlement Rate" for a tabular presentation of the
Settlement Rate and the approximate market value of the Common Stock receivable
upon settlement of the Units at certain assumed Applicable Market Values.
 
LIMITATION ON EQUITY APPRECIATION POTENTIAL
 
     Since the number of shares of Common Stock issuable upon settlement of each
Purchase Contract may decline by up to      % as the Applicable Market Value
increases, the opportunity for equity appreciation afforded by an investment in
the Units is less than that afforded by a direct investment in the Common Stock.
Assuming the Applicable Market Value accurately reflects fair market value, the
Applicable Market Value on the Stock Purchase Date must exceed the Threshold
Appreciation Price of $     per share before a holder of the Units realizes any
appreciation.
 
LIMITATION ON VALUE OF QUIPS (OR JUNIOR SUBORDINATED DEBENTURES) AS A RESULT OF
CALL OPTIONS
 
     If the value of the QUIPS (or Junior Subordinated Debentures) underlying
the Normal Units is greater than the value of the Aggregate Call Option Exercise
Consideration (as expected), it is likely that the Call Option Holder will
exercise its Call Options. In that case, the Call Option Holder rather than
holders of Normal Units will realize the benefit of that greater value. The
QUIPS (or Junior Subordinated Debentures) may increase in value due to, among
other things, a decrease in interest rates, an increase in the perceived credit
quality of the Company or an increase in the QUIPS and Debenture Rate. See
"Description of the Units -- Description of the QUIPS -- Distributions".
 
LIMITATIONS ON RIGHT TO CREATE STRIPPED UNITS
 
     Each holder of Normal Units will have the right to substitute, as Pledged
Securities, Treasury Securities that will generate payments matching such
holder's obligations under the underlying Purchase Contracts, in return for the
securities that theretofore had been the Pledged Securities. For so long as the
Call Options underlying such Normal Units remain exercisable, such right may be
exercised only if the holder obtains an instrument from the Call Option Holder
releasing its security interest in the Pledged Securities securing such Call
Options and agreeing that such Call Options no longer underlie such Units. The
holder might obtain such an instrument by separately documenting such Call
Options with the Call Option Holder (and, if required by the Call Option Holder,
entering into credit support arrangements satisfactory to the Call Option Holder
backing such Call Options), paying the Call Option Holder to cancel such Call
Options or otherwise. However, the Call Option Holder will be under no
obligation to deliver such an instrument, and there can be no assurance that a
holder will be able to induce the Call Option Holder to do so. Therefore,
investors may not be able to capitalize on any appreciation of the QUIPS through
this means. Goldman, Sachs & Co. have advised the Company that, while they are
the Call Option Holder, they will evaluate requests to
 
                                      S-15
<PAGE>   16
 
release their security interests in the Pledged Securities on a case-by-case
basis, taking into account the market value of the Pledged Securities as
compared to the cost to the Call Option Holder of exercising the Call Options,
the availability and amount of credit support, any payments to be made in
connection therewith and other factors pertaining at the time of any requested
release. In doing so, Goldman, Sachs & Co. would expect that they would not
grant such a request unless the value of the payments and other new rights
offered by the holder were no less valuable to Goldman, Sachs & Co. than the
rights they had before granting such request.
 
PLEDGED SECURITIES ENCUMBERED
 
     Although holders of Units will be beneficial owners of the underlying
Pledged Securities, those Pledged Securities will be pledged with the Collateral
Agent to secure the obligations of the holders under the Purchase Contracts and
the Call Options. Thus, for so long as the Purchase Contracts remain in effect,
holders will not be entitled to withdraw their Pledged Securities from this
pledge arrangement except in the limited circumstances described herein.
 
SUBORDINATION OF COMPANY OBLIGATIONS
 
     The ability of the Trust to pay amounts due on the QUIPS (including,
without limitation, the ability of the Trust to pay amounts due upon exercise of
any Junior Subordinated Debenture Put Options) is dependent upon the Company
making payments on the Junior Subordinated Debentures as and when required.
 
     The obligations of the Company under the Junior Subordinated Debentures and
the Guarantee will be unsecured and subordinate and rank junior in right of
payment to all present and future Senior Indebtedness of the Company to the
extent and in the manner set forth in the Indenture and the Guarantee,
respectively. No payments on account of principal of, premium, if any, or
interest on the Junior Subordinated Debentures(including payments on exercise of
Junior Subordinated Debenture Put Options)may be made if there shall have
occurred and be continuing a default in any payment with respect to Senior
Indebtedness, or an event of default with respect to any Senior Indebtedness
resulting in the acceleration of the maturity thereof, or if any judicial
proceeding shall be pending with respect to any default. In the event of the
acceleration of the maturity of Junior Subordinated Debentures, the holders of
all Senior Indebtedness outstanding at the time of such acceleration will first
be entitled to receive payment in full of all amounts due in respect of such
Senior Indebtedness before the holders of Junior Subordinated Debentures will be
entitled to receive or retain any payment in respect of Junior Subordinated
Debentures. Notwithstanding the foregoing, amounts that would be due and payable
by the Company to holders of Units in the absence of the foregoing subordination
provisions may be applied by such holders to offset their obligations under
their respective Purchase Contracts.
 
     None of the Indenture, the Guarantee, the Declaration or the Master Unit
Agreement places any limitation on the amount of secured or unsecured debt,
including Senior Indebtedness, that may be incurred by the Company or any of its
subsidiaries. At June 16, 1998, after giving effect to the June 16, 1998
issuance by the Company of $125 million aggregate principal amount of its 6.95%
Senior Notes due 2005, the Company had $266.3 million of Senior Indebtedness
outstanding.
 
     See "Description of the Units -- Description of the Junior Subordinated
Debentures -- Subordination" and "Description of the Guarantee -- Status".
 
OPTION TO DEFER PAYMENTS
 
     The Company will generally have the right to defer payments of interest on
the Junior Subordinated Debentures at any time or from time to time for a period
not extending beyond the QUIPS and Debenture Maturity Date. Upon any such
deferral, quarterly distributions on the QUIPS by the Trust will be deferred.
However, deferred payments of interest on the Junior Subordinated Debentures and
deferred distributions on the QUIPS will bear additional interest or
distributions at a
                                      S-16
<PAGE>   17
 
rate per annum equal to the Deferral Rate (compounding on each succeeding
Quarterly Payment Date) until paid. See "Description of the Units -- Description
of the QUIPS -- Distributions" and "-- Description of the Junior Subordinated
Debentures -- Option to Extend Interest Payment Date".
 
     If Contract Fees are payable by the Company on the Purchase Contracts, the
Company will generally have the right to defer the payment of such Contract Fees
at any time or from time to time for a period not extending beyond the Stock
Purchase Date. However, deferred payments of Contract Fees will bear additional
Contract Fees at a rate per annum equal to the Deferral Rate (compounding on
each succeeding Quarterly Payment Date) until paid. If the Purchase Contracts
are terminated (upon the occurrence of certain events of bankruptcy, insolvency,
or reorganization with respect to the Company), the right to receive Contract
Fees, including deferred Contract Fees, will terminate.
 
     Should the Company elect to exercise its right to defer payments of
interest on the Junior Subordinated Debentures or Contract Fees, the market
price of the QUIPS or Junior Subordinated Debentures or, for so long as the
Purchase Contracts remain in effect, the Units is likely to be affected. A
holder that disposes of its QUIPS, Junior Subordinated Debentures or Units
during such deferral period, therefore, might not receive the same return on its
investment as a holder that continues to hold its QUIPS, Junior Subordinated
Debentures or Units. In addition, the mere existence of the Company's right to
defer such payments may cause the market price of the QUIPS, Junior Subordinated
Debentures or Units to be more volatile than the market prices of other
securities that are not subject to such deferrals.
 
     For information about the taxation of holders in the event that the Company
exercises its right to defer payments, see "-- Tax Matters" and "Certain Federal
Income Tax Consequences -- Interest Receivable on the QUIPS".
 
MASTER UNIT AGREEMENT NOT QUALIFIED UNDER TRUST INDENTURE ACT; LIMITED
  OBLIGATIONS OF UNIT AGENT
 
     Although the QUIPS constituting a part of the Normal Units will be issued
pursuant to a Declaration qualified as an indenture under the Trust Indenture
Act, the Master Unit Agreement relating to the Units and the appointment of the
Unit Agent (as defined herein) as the agent and attorney-in-fact for the holders
of the Units will not be qualified as an indenture under the Trust Indenture
Act, and the Unit Agent will not be required to qualify as a trustee thereunder.
Accordingly, holders of the Units will not have the benefits of the protections
of the Trust Indenture Act. Under the terms of the Master Unit Agreement, the
Unit Agent will have only limited obligations to the holders of the Units.
See"Description of the Units -- Certain Provisions of the Principal
Agreements -- Information Concerning the Unit Agent".
 
RIGHTS UNDER THE GUARANTEE
 
     The Guarantee will guarantee payments due in respect of the QUIPS to the
holders of the QUIPS (including holders of Normal Units so long as the Normal
Units include QUIPS), but only to the extent that the Trust has funds on hand
legally available therefor. If the Company defaults on its obligation to pay
amounts payable in respect of the Junior Subordinated Debentures, the Trust will
not have sufficient funds to make the corresponding payments due in respect of
the QUIPS, and, in such event, holders of the QUIPS (including holders of Normal
Units so long as the Normal Units include QUIPS) will not be able to rely upon
the Guarantee for payment of such amounts.
 
ENFORCEMENT RIGHTS IN RESPECT OF JUNIOR SUBORDINATED DEBENTURES
 
     In the event a Debenture Event of Default (as defined herein) shall have
occurred and be continuing and such event is attributable to the failure of the
Company to pay principal or interest on the Junior Subordinated Debentures on
the respective dates such principal or interest is payable
                                      S-17
<PAGE>   18
 
(after giving effect to any permitted deferral), then a holder of record of
QUIPS (or, for so long as QUIPS underlie Normal Units, a holder of record of
Normal Units) may institute a legal proceeding directly against the Company for
enforcement of payment to such holder of the portion of such principal or
interest attributable to Junior Subordinated Debentures having a principal
amount equal to the aggregate Liquidation Amount of the QUIPS held by such
holder (or underlying such holder's Normal Units) (a "Direct Action"). Except as
described herein, holders of QUIPS will not be able to exercise directly any
other remedy available to the holders of the Junior Subordinated Debentures or
to assert directly any other rights in respect of the Junior Subordinated
Debentures. See "Description of the Units -- Description of the Junior
Subordinated Debentures -- Enforcement of Certain Rights by Holders of the
QUIPS" and "-- Debenture Events of Default" and "-- Description of the
Guarantee". The Declaration will provide that each holder of QUIPS (including
each holder of Normal Units for so long as Normal Units include QUIPS) by
acceptance thereof agrees to the provisions of the Indenture and the Guarantee.
 
LIMITED VOTING AND OTHER RIGHTS
 
     Holders of QUIPS (including holders of Normal Units for so long as Normal
Units include QUIPS) generally will have voting rights with respect to the QUIPS
relating only to the modification of the terms of the QUIPS and the exercise of
the Trust's rights as holder of the Junior Subordinated Debentures. Holders of
QUIPS will not be entitled to vote to appoint, remove or replace, or to increase
or decrease the number of, the Issuer Trustees or Administrators, which voting
rights are vested exclusively in the holder of the Common Trust Securities,
except as described under "Description of the Units -- Description of the
QUIPS -- Removal of Issuer Trustees and Administrators". See "Description of the
Units -- Description of the QUIPS -- Voting Rights; Amendment of the
Declaration".
 
     Holders of Units will not be entitled to any rights with respect to the
Common Stock (including, without limitation, voting rights or rights to receive
any dividends or other distributions in respect thereof) until such time as the
Company shall have delivered shares of Common Stock upon settlement of the
Purchase Contracts on the Stock Purchase Date.
 
POSSIBLE ILLIQUIDITY OF THE SECONDARY MARKET
 
     The Units are securities for which there is currently no secondary market.
It is not possible to predict how the Units will trade in the secondary market
or whether the market for the Units will be liquid or illiquid. Application will
be made to list the Normal Units on the NYSE. The Underwriters have advised the
Company and the Trust that the Underwriters intend to make a market for the
Normal Units; however, the Underwriters are not obligated to do so and any
market making may be discontinued at any time.
 
TAX MATTERS
 
     For United States federal income tax purposes, the Junior Subordinated
Debentures will be classified as contingent debt instruments. Consequently, they
will be considered to be issued with original issue discount ("OID"), which each
holder of QUIPS (including each holder of Normal Units for so long as Units
include QUIPS) will be required to include in income during the holder's period
of ownership of the QUIPS, subject to certain adjustments. Additionally, holders
may be required to recognize ordinary income on all or a portion of any gain
realized on the sale of QUIPS or gain attributable to the QUIPS on a sale of
Units before maturity. See "Certain Federal Income Tax Consequences -- Interest
Received on the QUIPS" and "-- Sale or Disposition of Units".
 
     Should the Company exercise its right to defer payments of interest on the
Junior Subordinated Debentures, each holder of QUIPS (including each holder of
Normal Units for so long as Normal Units include QUIPS) will continue to be
required to accrue OID in respect of the deferred stated interest allocable to
its QUIPS for United States federal income tax purposes. As a result, during a
 
                                      S-18
<PAGE>   19
 
deferral period, each holder of QUIPS will recognize income for United States
federal income tax purposes but will not receive cash attributable to such
income prior to the conclusion of such deferral period. In addition, a holder
will not receive any cash related to the income accrued during a deferral period
if the holder disposes of the QUIPS prior to the record date for the payment of
distributions. Assuming, however, that the Company does not exercise its right
to defer payments, the Company believes that the amount of taxable income
required to be recognized each year with respect to the QUIPS will not exceed
the amount of cash distributed each year with respect to the QUIPS. See "Certain
Federal Income Tax Consequences -- Interest Received on the QUIPS".
 
     In the event that holders of Units are required to pay Contract Fees to the
Company, it is unlikely that such holders will be entitled to a current
deduction for such payments. As a result, although the amount of cash actually
distributed to holders will be reduced by the amount of Contract Fees payable to
the Company, holders will nevertheless recognize income each quarter equal to
the full amount of OID accrued with respect to the QUIPS, subject to certain
adjustments. See "Certain Federal Income Tax Consequences -- Contract Fees".
 
     Because income with respect to the QUIPS will not be considered as
dividends for United States federal income tax purposes, corporate holders of
Normal Units or QUIPS will not be entitled to a dividends-received deduction in
respect of such income.
 
                                      S-19
<PAGE>   20
 
                                   THE TRUST
 
     AmerUs Capital II is a statutory business trust created under the laws of
the State of Delaware pursuant to (i) a declaration of trust, dated as of April
14, 1998, executed by the Company, as Sponsor, and certain of the Issuer
Trustees and (ii) the filing of a certificate of trust with the Secretary of
State of the State of Delaware on April 14, 1998. Such declaration of trust will
be amended and restated in its entirety by the Declaration. The Declaration will
be qualified as an indenture under the Trust Indenture Act. The Trust exists for
the exclusive purposes of (i) issuing the Trust Securities representing
undivided beneficial interests in the assets of the Trust, (ii) investing the
proceeds of the Trust Securities in the Junior Subordinated Debentures and (iii)
engaging in only those other activities necessary or incidental thereto.
Accordingly, the Junior Subordinated Debentures will be the sole assets of the
Trust and payments under the Junior Subordinated Debentures will be the sole
revenues of the Trust. The Trust has a term of approximately seven (7) years,
but may dissolve earlier as provided in the Declaration. All of the Common Trust
Securities will be directly or indirectly owned by the Company. The Common Trust
Securities will rank pari passu, and payments will be made thereon pro rata,
with the QUIPS, except that, if an event of default under the Declaration has
occurred and is continuing, the rights of the holders of the Common Trust
Securities to payment in respect of distributions and payments upon liquidation,
redemption and otherwise will be subordinated to the rights of the holders of
the QUIPS. Although, upon issuance of the QUIPS, the holders of the Units will
be beneficial owners of the underlying QUIPS, the QUIPS will be pledged with the
Collateral Agent to secure the obligations of the holders under the Purchase
Contracts and Call Options. The Company will directly or indirectly acquire all
of the Common Trust Securities; such Common Trust Securities will have an
aggregate liquidation amount equal to 3% of the total capital of the Trust.
 
     The Trust's business and affairs will be conducted by the Issuer Trustees
and Administrators appointed by the Company as the holder of the Common Trust
Securities. The Issuer Trustees will be First Union National Bank, as the
Property Trustee (the "Property Trustee"), and First Union Trust Company,
National Association as the Delaware Trustee (the "Delaware Trustee"), and the
Administrators will be three individuals who are employees of the Company (the
"Administrators"). First Union National Bank, as the Property Trustee, will act
as sole indenture trustee under the Declaration for purposes of compliance with
the provisions of the Trust Indenture Act. First Union National Bank will also
act as Guarantee Trustee under the Guarantee and the Indenture, until removed or
replaced by the holder of the Common Trust Securities. See "Description of the
Units -- Description of the Guarantee" and "Description of the
Units -- Description of Junior Subordinated Debentures". The Company, as the
direct or indirect holder of the Common Trust Securities, or if an event of
default under the Declaration has occurred and is continuing, the holders of a
majority in Liquidation Amount of the Trust Securities, will be entitled to
appoint, remove or replace the Property Trustee and/or the Delaware Trustee. In
no event will the holder of the QUIPS (or Units) have the right to vote to
appoint, remove or replace the Administrators; such voting rights will be vested
exclusively in the Company, as the direct or indirect holder of the Common Trust
Securities. The duties and obligations of each Issuer Trustee and Administrator
are governed by the Declaration. The Company will pay directly all fees,
expenses, debts and obligations (other than the Trust Securities) related to the
Trust and the offering of the Units, including all ongoing costs, expenses,
taxes and other liabilities of the Trust. Under the Declaration, all parties to
the Declaration will agree, and the holders of the Units upon purchase of their
Units will be deemed to have agreed, for United States federal income tax
purposes, to treat the Trust as a grantor trust, the Junior Subordinated
Debentures as indebtedness and the Trust Securities as evidence of indirect
beneficial ownership in the Junior Subordinated Debentures. See "Description of
the Units -- Description of the Guarantee" and "-- Description of the QUIPS".
 
     The Property Trustee will hold title to the Junior Subordinated Debentures
for the benefit of the holders of the Trust Securities and the Property Trustee
will have the power to exercise all rights, powers and privileges under the
Indenture as the holder of the Junior Subordinated Debentures. In
 
                                      S-20
<PAGE>   21
 
addition, the Property Trustee will maintain exclusive control of a segregated
non-interest bearing bank account (the "Property Account") to hold all payments
made in respect of the Junior Subordinated Debentures for the benefit of the
holders of the Trust Securities. The Property Trustee will make payments of
distributions and payments on liquidation, redemption and otherwise to the
holders of the Trust Securities out of funds from the Property Account. The
Guarantee Trustee will hold the Guarantee for the benefit of the holders of the
QUIPS. See "Description of the Units -- Description of the Junior Subordinated
Debentures".
 
     The rights of the holders of the QUIPS, including economic rights, rights
to information and voting rights, are set forth in the Declaration, the Delaware
Business Trust Act and the Trust Indenture Act. See "Description of the
Units -- Description of the QUIPS".
 
     The principal place of business of the Trust is AmerUs Capital II, c/o
AmerUs Life Holdings, Inc., 699 Walnut, Des Moines, Iowa 50309-3948 and its
telephone number is (515) 362-3600.
 
                                USE OF PROCEEDS
 
     The net proceeds to be received by the Trust from the sale of the QUIPS,
after deducting estimated underwriting discounts and expenses of the offering
payable by the Company, are expected to be $          million, of which
$          million will be from the sale of the Call Options to the Call Option
Holder (approximately $          million, of which $          will be from the
sale of the Call Options, if the Underwriters' over-allotment option is
exercised in full). The proceeds to be received by the Trust from the sale of
the QUIPS will be invested by the Trust in the Junior Subordinated Debentures of
the Company. The Company intends to use such proceeds to repay the remaining
outstanding Bank Debt, to partially fund a stock repurchase of up to $75 million
of the Company's Class A Common Stock and for general corporate purposes. The
Company's outstanding Bank Debt was incurred pursuant to a credit agreement
which expires in October 2002. The Bank Debt was incurred to repay its
obligations under a prior credit agreement and to finance the acquisition of
Delta Life. Pursuant to the Credit Agreement, the Bank Debt bears interest at
variable rates. As of June 18, 1998, the Company was paying an annual interest
rate of 6.33% on the Bank Debt.
 
                PRICE RANGE OF COMMON STOCK AND DIVIDEND POLICY
 
     The Common Stock of the Company has been listed for trading on the NYSE
since February 20, 1998 under the symbol AMH and was listed on the Nasdaq
National Market System from the date of the Company's initial public offering on
January 28, 1997 through February 19, 1998 under the symbol AMRS. Based upon
information reported in the Bloomberg consolidated transaction reporting system,
the high and low sales prices for each quarterly period from January 28, 1997 to
the date hereof were:
 
<TABLE>
<CAPTION>
                                                                PRICE RANGE
                                                              ---------------
                                                              HIGH       LOW
                                                              ----       ----
<S>                                                           <C>       <C>
YEAR ENDED DECEMBER 31, 1997
  First quarter (from January 28)...........................  24 9/16   19
  Second quarter............................................  28 11/16  21 1/8
  Third quarter.............................................  35 1/2    27
  Fourth quarter............................................  38 1/8    27 1/2

YEAR ENDED DECEMBER 31, 1998
  First quarter.............................................  36 3/4    30 1/2
  Second quarter............................................  34 13/16  30 5/8
</TABLE>
 
                                      S-21
<PAGE>   22
 
     As of July 9, 1998, there were approximately 6,764 holders of the
outstanding shares of Common Stock, including individual participants in
securities position listings. The last reported sales price of the Common Stock
on the NYSE on July 9, 1998 was $32 1/4 per share.
 
     Since the second quarter of 1997, the Company's Board of Directors has
declared a quarterly cash dividend of $0.10 per share to shareholders of its
Class A Common Stock. The declaration and payment of future dividends to holders
of its Common Stock by the Company will be at the discretion of the Board of
Directors and will depend upon the Company's earnings and financial condition,
capital requirements of its Subsidiaries, regulatory considerations and other
factors the Board of Directors deems relevant. The Company's general policy is
to retain most of its earnings to finance the growth and development of its
business.
 
     Because the Company is a holding company, it is dependent upon its
Subsidiaries to provide funding for the Company's operating expenses and for the
payment by the Company of debt service and dividends. State insurance laws
applicable to the Company's Subsidiaries limit the payment of dividends and
other distributions by such Subsidiaries to the Company and may therefore limit
the ability of the Company to make dividend payments. See "Risk Factors --
Holding Company Structure -- Limitations on Dividends" and "Reorganization and
Recent Acquisitions" in the Prospectus and "Prospectus Summary -- Recent
Acquisitions".
 
                                      S-22
<PAGE>   23
 
                                 CAPITALIZATION
 
     The following table summarizes the actual capitalization of the Company and
its consolidated subsidiaries at March 31, 1998 and such capitalization adjusted
on a pro forma basis to reflect the June 16, 1998 issuance by the Company of
$125,000,000 aggregate principal amount of its 6.95% Senior Notes due 2005 and
the sale by the Company of the Units offered hereby (assuming gross proceeds of
$130,435,000 and assuming the Underwriters' over-allotment option is not
exercised) and an assumed application of the proceeds from such sale, after
underwriting commissions and estimated expenses of this offering, to repay
indebtedness. This table should be read in conjunction with the Company's
Quarterly Report on Form 10-Q for the three months ended March 31, 1998 which is
incorporated by reference in the accompanying Prospectus.
 
<TABLE>
<CAPTION>
                                                                    MARCH 31, 1998
                                                              --------------------------
                                                                           PRO FORMA FOR
                                                                           THE ISSUANCE
                                                                           OF THE SENIOR
                                                                             NOTES AND
                                                                ACTUAL       THE UNITS
                                                              ----------   -------------
                                                                    (IN THOUSANDS)
<S>                                                           <C>          <C>
Commercial paper and notes payable:
  Debt Outstanding to Banks.................................  $  266,341    $   16,341
  Senior Notes due 2005.....................................          --       125,000
                                                              ----------    ----------
          Total Debt........................................     266,341       141,341
Capital Securities..........................................      86,000       216,435
                                                              ----------    ----------
Shareholders' equity:
  Class A Common Stock(1)...................................      29,735        29,735
  Class B Common Stock......................................       5,000         5,000
Accumulated other comprehensive income, net of deferred
  income taxes..............................................      54,099        54,099
Additional paid-in capital..................................     383,686       383,686
Retained earnings...........................................     472,108       472,108
                                                              ----------    ----------
Total shareholders' equity..................................     944,628       944,628
                                                              ----------    ----------
          Total capitalization..............................  $1,296,969    $1,302,404
                                                              ==========    ==========
</TABLE>
 
- ---------------
(1) Does not include up to        shares (     if the Underwriters'
    over-allotment option is exercised in full) of Class A Common Stock issuable
    on the Stock Purchase Date of                , 2001 upon settlement of the
    Purchase Contracts.
 
                                      S-23
<PAGE>   24
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 RESULTS OF OPERATIONS AND FINANCIAL CONDITION
 
     The information appearing below has been extracted from Management's
Discussion and Analysis of Results of Operations and Financial Condition
contained in the Company's Report on Form 10-Q for the three-month period ended
March 31, 1998 (which is incorporated by reference in the Prospectus) and should
be read in conjunction with the more complete information contained therein.
 
RESULTS OF OPERATIONS -- FIRST QUARTER 1998 COMPARED TO FIRST QUARTER 1997
 
  Revenues
 
     Individual life and annuity premiums and product charges increased by $14.3
million, or 73.8%, to $33.6 million for the first quarter of 1998 from $19.3
million for the first quarter of 1997. Included in the 1998 increase were $6.3
million of insurance and annuity premiums and product charges from Delta and
AmVestors. Insurance premiums increased by $9.1 million to $17.3 million for the
first quarter of 1998 compared to $ 8.2 million for the first quarter of 1997.
Included in the increased insurance premiums in 1998 was $2.0 million from the
acquisitions. Traditional life insurance premiums increased by $5.6 million
primarily as a result of growth in renewal premiums on traditional life
insurance policies not included in the Closed Block (as defined in the
accompanying Prospectus). Immediate annuity deposits and supplementary contract
premiums were $3.5 million higher in 1998 than in 1997 with $1.8 million from
the recent acquisitions of Delta and AmVestors and $1.7 million from increased
immediate annuity and supplementary contract premium sales of AmerUs Life.
 
     Universal life product charges increased by $0.6 million for the first
quarter of 1998 primarily due to increased cost of insurance charges as a result
of the normal aging of the block of business.
 
     Annuity product charges for first quarter 1998 increased by $4.5 million
from 1997 amounts. The increase includes $4.3 million of annuity product charges
from Delta and AmVestors.
 
     Net investment income increased by $82.2 million to $133.1 million for
first quarter 1998. Included in the 1998 increase in net investment income was
$82.6 million of net investment income from Delta and AmVestors. The remaining
$0.4 million decrease in net investment income was attributable to a decrease in
average invested assets (excluding market value adjustments, the Closed Block,
and Delta and AmVestors) partially offset by an increase in effective yields on
average invested assets. Average invested assets (excluding market value
adjustments, the Closed Block and Delta and AmVestors) in the first quarter of
1998 decreased by $56.8 million from the first quarter of 1997, primarily as a
result of the continued runoff of AmerUs Life's individual deferred annuity
business. Effective May, 1996 substantially all new sales of individual deferred
annuities by AmerUs Life's distribution network have been made through the joint
venture (the "Ameritas Joint Venture") with Ameritas Life Insurance Corp.
pursuant to which AmerUs Life markets fixed annuities issued by Ameritas
Variable Life Insurance Company ("AVLIC") and sells AVLIC's variable life
insurance and variable annuity products. The effective yield on average invested
assets (excluding market value adjustments, the Closed Block and Delta and
AmVestors) increased from 7.22% for the first quarter of 1997 to 7.26% for the
first quarter of 1998.
 
     Realized gains on investments were $6.2 million for the first quarter of
1998 compared to gains of $5.2 million for the first quarter of 1997. Included
in the first quarter amounts were $1.9 million of gains from Delta and
AmVestors.
 
  The Closed Block
 
     The Closed Block was established on June 30, 1996. Insurance policies which
had a dividend scale in effect as of June 30, 1996 were included in the Closed
Block. The Closed Block was designed to provide reasonable assurance to owners
of insurance policies included therein that,
 
                                      S-24
<PAGE>   25
 
after the Company's reorganization, assets would be available to maintain the
dividend scales and interest credits in effect prior to the Company's
reorganization if the experience underlying such scales and credits continues.
 
     The contribution to the operating income of the Company from the Closed
Block is reported as a single line item in the income statement. Accordingly,
premiums, product charges, investment income, realized gains or losses on
investments, policyowner benefits and dividends attributable to the Closed
Block, less certain minor expenses including amortization of deferred policy
acquisition costs, are shown as a net number in the accompanying Prospectus
under the caption the "Contribution from the Closed Block." This results in
material reductions in the respective line items in the income statement while
having no effect on net income. The expenses associated with the administration
of the policies included in the Closed Block and the renewal commissions on
these policies are not charged against the Contribution from the Closed Block,
but rather are grouped with underwriting, acquisition and insurance expenses.
Also, all assets allocated to the Closed Block are grouped together and shown as
a separate item in the accompanying Prospectus entitled "Closed Block Assets."
Likewise, all liabilities attributable to the Closed Block are combined and
disclosed in the accompanying Prospectus as the "Closed Block Liabilities."
 
     The contribution from the Closed Block for the first quarter of 1998 was
$9.0 million compared to $9.3 million for the same period in 1997.
 
     Closed Block insurance premiums decreased by $4.5 million to $50.4 million
for the first quarter of 1998 compared to $54.9 million for the same period in
1997. Insurance policies which had a dividend scale in effect as of June 30,
1996 were included in the Closed Block. The decrease in insurance premiums
reflects a reduction in the Closed Block's traditional life insurance business
in force as a result of the lapse of such business. Similarly, the decrease in
product charges on universal life policies included in the Closed Block is
primarily the result of the reduction of such business in force.
 
     Net investment income for the Closed Block increased by $2.9 million to
$29.2 million for the first quarter of 1998 compared to $26.3 million for the
first quarter of 1997 due primarily to higher average invested assets (excluding
market value adjustments) partially offset by lower effective yields. Average
invested assets (excluding market value adjustments) increased by $125.6 million
and average effective yields decreased by 19 basis points for the Closed Block.
 
     Realized gains on investments of the Closed Block were $0.9 million for the
first quarter of 1998 compared to a $0.6 million realized loss for the same
period in 1997.
 
     Closed Block policyowner benefits were $49.0 million for the first quarter
of 1998 compared to $49.7 million a year ago. The decrease in benefits was
largely the result of lower death benefits on the Closed Block policies.
 
     Insurance expenses for the Closed Block were $1.4 million for the first
quarter of 1998 compared to $1.5 million for the first quarter of 1997. The
decrease in expenses is the result of reduced premium taxes on such business due
to the lower insurance premiums.
 
     The amortization of deferred policy acquisition costs for the Closed Block
increased by $1.2 million to $8.0 million for the first quarter of 1998.
Deferred policy acquisition costs are generally amortized in proportion to gross
margins, including realized capital gains. Lower death benefits and increased
realized capital gains in the first quarter of 1998, compared to the same period
in 1997, contributed to higher gross margins in 1998 on those policies included
in the Closed Block for which deferred costs are amortized, resulting in the
increased amortization in 1998.
 
     Closed Block dividends to policyowners were $16.6 million for the first
quarter of 1998 compared to $17.1 million for the same period in 1997.
 
                                      S-25
<PAGE>   26
 
  Policyowner Benefits
 
     Total policyowner benefits were $107.3 million for the first quarter of
1998 compared to $45.5 million for the first quarter of 1997, an increase of
$61.8 million. Included in the first quarter 1998 amounts were $63.0 million of
benefits of acquired companies primarily consisting of interest credited to
deferred annuity account balances. Traditional life insurance benefits increased
by $1.0 million in 1998 primarily due to the growth and aging of such business
in force. Universal life insurance benefits were $1.3 million lower in 1998
primarily due to decreased death benefits as a result of lower mortality.
 
     Annuity benefits increased by $62.0 million for the first quarter of 1998
to $85.8 million compared to $23.8 million for the first quarter of 1997.
Included in the first quarter 1998 annuity benefits were $62.0 million
attributable to the recent acquisitions of Delta and AmVestors. AmerUs Life's
annuity benefits were $23.8 million for both the first quarters of 1998 and
1997. Interest credited to AmerUs Life's policyowner account balances decreased
by $1.8 million to $13.6 million for the first quarter of 1998 compared to $15.4
million for the same period in 1997. The weighted average crediting rate for
AmerUs Life's individual deferred annuity liabilities decreased by 19 basis
points from 5.48% for the first quarter of 1997 to 5.29% for the first quarter
of 1998, and AmerUs Life's average deferred annuity liabilities decreased by
$110.4 million from the first quarter of 1997 to the same period in 1998 also
contributing to the lower credited amounts in 1998. Other annuity benefits for
AmerUs Life increased by $1.8 million to $10.2 million for the first quarter of
1998 compared to $8.4 million for the first quarter of 1997, primarily as a
result of increased immediate annuity and supplementary contract premium sales.
 
  Expenses
 
     The Company's commission expense, net of deferrals, increased by $1.0
million to $3.1 million for the first quarter of 1998 compared to $2.1 million
for the first quarter of 1997. Included in the increase is $0.4 million of
commission expense, net of deferrals, from the recent acquisitions. Other
underwriting, acquisition and insurance expenses, net of deferrals, increased by
$16.0 million to $24.9 million for the first quarter of 1998. Included in the
1998 amounts is $15.7 million of expenses for the recently acquired companies,
including $1.8 million of goodwill amortization and $6.7 million of amortization
of value of business acquired. Excluding recently acquired companies, other
underwriting, acquisition and insurance expenses, net of deferrals, increased by
$0.3 million.
 
     The amortization of deferred policy acquisition costs increased by $3.1
million to $8.2 million in the first quarter of 1998 compared to $5.1 million in
the first quarter of 1997. Deferred policy acquisition costs are generally
amortized in proportion to gross margins, including realized capital gains.
Lower death benefits and increased realized capital gains in the first quarter
of 1998, compared to the first quarter of 1997, contributed to higher gross
margins in 1998 on products for which deferred costs are amortized, resulting in
the increased amortization in 1998.
 
  Income from Operations
 
     Income from operations increased by $15.1 million to $38.2 million for the
first quarter of 1998 compared to $23.1 million for the same period in 1997,
with the recent acquisitions of Delta and AmVestors adding $12.2 million of
income from operations during the first quarter of 1998. Improved product
margins, in large part due to the result of better mortality, contributed to the
remaining increase in income from operations in 1998.
 
  Interest Expense
 
     Interest expense increased by $3.7 million in the first quarter of 1998 to
$6.7 million compared to $3.0 million for the first quarter of 1997. The
increased interest expense in the first quarter of 1998 was due to increased
interest expense on the capital securities issued by the Company on
 
                                      S-26
<PAGE>   27
 
February 3, 1997 and increased interest expense on the revolving line of credit
as a result of increased debt levels.
 
  Income Before Income Tax Expense
 
     Income before income tax expense and equity in earnings of unconsolidated
subsidiary increased by $11.4 million to $31.5 million for the first quarter of
1998 compared to $20.1 million for the first quarter of 1997, with the recent
acquisitions of Delta and AmVestors adding $12.2 million to such income for the
first quarter of 1998.
 
  Income Tax Expense
 
     Income tax expense increased by $4.4 million to $10.1 million for the first
quarter of 1998 compared to $5.7 million for the same period of 1997. The
increase in income tax expense was primarily due to the higher pre-tax income
including income from the recent acquisitions of Delta and AmVestors. The
effective income tax rate for the first quarter of 1998 was 32.3% compared to
28.5% for the first quarter of 1997. The higher effective tax rate in 1998 was
in part attributable to the non-deductibility of the amortization of goodwill
resulting from the recent acquisitions. In addition, relatively similar amounts
of tax credits in 1998 and 1997 had a greater impact on reducing the effective
tax rate for the first quarter of 1997 due to the lower income in the first
quarter of 1997.
 
  Net Income
 
     Net income increased by $7.2 million to $21.8 million for the first quarter
of 1998 compared to $14.6 million for the same period in 1997, with the recent
acquisitions of Delta and AmVestors adding $6.8 million of net income for the
first quarter of 1998.
 
                              ACCOUNTING TREATMENT
 
     The financial statements of the Trust will be reflected in the Company's
consolidated financial statements, with the QUIPS shown on the Company's balance
sheet under the caption "Company-obligated mandatorily redeemable capital
securities of subsidiary trust". The financial statement footnotes to the
Company's consolidated financial statements will reflect that the sole asset of
the Trust will be the Junior Subordinated Debentures. Distributions on the QUIPS
will be reflected as a charge to the Company's consolidated income, identified
as "Distributions on capital securities", whether paid or accrued.
 
     The Purchase Contracts are forward transactions in the Company's Common
Stock. Under generally accepted accounting principles, the Purchase Contracts
will not be recorded on the Company's consolidated balance sheets but will be
disclosed in the notes to the Company's consolidated financial statements. Upon
settlement of a Purchase Contract, the Company will receive the Stated Amount on
such Purchase Contract and will issue the requisite number of shares of Common
Stock. The Stated Amount thus received will be credited to shareholders' equity
allocated between the common stock and paid-in capital accounts.
 
     Prior to the issuance of shares of Common Stock upon settlement of the
Purchase Contracts, it is anticipated that the Units will be reflected in the
Company's diluted earnings per share calculations using the treasury stock
method. Under this method, the number of shares of Common Stock used in
calculating diluted earnings per share is deemed to be increased by the excess,
if any, of the number of shares issuable upon settlement of the Purchase
Contracts over the number of shares that could be purchased by the Company in
the market (at the average market price during the period) using the proceeds
receivable upon settlement. Consequently, it is anticipated there will be no
dilutive effect on the Company's diluted earnings per share except during
periods when the average market price of Common Stock is above the Threshold
Appreciation Price.
 
                                      S-27
<PAGE>   28
 
                            DESCRIPTION OF THE UNITS
 
     The summaries of certain provisions of documents described below are not
necessarily complete, and in each instance reference is hereby made to the
description of the Units contained in the Prospectus and the copies of such
documents (including the definitions therein of certain terms) which are on file
with the Commission. Wherever particular sections of, or terms defined in, such
documents are referred to herein, such sections or defined terms are
incorporated by reference herein. Capitalized terms not defined herein have the
meanings assigned to such terms in the Principal Agreements (as defined herein).
The following description of the specific terms of the Units, including the
related instruments and underlying agreements, supplements and, to the extent
inconsistent therewith, replaces the description of the general terms of the
Units, including the related instruments and underlying agreements, set forth in
the accompanying Prospectus, to which reference is hereby made. See "Description
of Debt Securities", "Description of Capital Securities of the AmerUs Trusts",
"Description of Guarantees" and "Description of the Purchase Contracts and the
Units" in the accompanying Prospectus.
 
GENERAL
 
     Each Unit will have a Stated Amount of $          (equal to the last
reported per share sale price of the Common Stock on the NYSE on the date of
this Prospectus Supplement). Each Unit will initially consist of (a) a Purchase
Contract under which (i) the holder will purchase from the Company on the Stock
Purchase Date of                , 2001, for cash in an amount equal to the
Stated Amount, between                of a share and one share of Common Stock
of the Company, having such terms as set forth in the Company's Articles of
Incorporation (as defined in the accompanying Prospectus) as amended from time
to time, (depending on the Applicable Market Value of the Common Stock on the
Stock Purchase Date, as described below), subject to adjustment in certain
circumstances, and (ii) Contract Fees will be payable at the Contract Fee Rate
of      % of the Stated Amount per annum as described below (see "-- Description
of the Purchase Contracts"), and (b) a QUIPS having a Liquidation Amount equal
to the Stated Amount, a distribution rate of      % of the Stated Amount per
annum and a mandatory redemption date of                , 2003 (see
"-- Description of the QUIPS"), subject to a Call Option granted by the holder
of the Unit to the Call Option Holder which (when aggregated with the Call
Options underlying all other Units) will entitle the Call Option Holder to
acquire the QUIPS underlying the Units (or the Junior Subordinated Debentures
substituted therefor), on or before the last Quarterly Payment Date prior to the
Stock Purchase Date (or, if such date is not a Trading Day, the next succeeding
Trading Day) (i.e., the Call Option Expiration Date) in exchange for the
Aggregate Call Option Exercise Consideration (see "-- Description of the Call
Options"). For so long as a Purchase Contract remains in effect, such Purchase
Contract and the QUIPS or other Pledged Securities securing it (and, for so long
as the Call Option relating to such Pledged Securities is exercisable, the
obligations of the holder to the Call Option Holder thereunder) will not be
separable and may be transferred only as an integrated Unit.
 
     For the period from the date of issuance of the Units to the Stock Purchase
Date, each holder of a Unit (other than a Stripped Unit) will be entitled to
receive cash payments of      % of the Stated Amount per annum, payable in
arrears on the Quarterly Payment Dates of                ,                ,
               and                of each year (unless deferred as described
herein). Such payments will consist of payments on the QUIPS or other Pledged
Securities plus Contract Fees payable by the Company or net of Contract Fees
payable by the holders, as the case may be. See "-- Description of the
QUIPS -- Distributions", "-- Description of the Call Options" and
"-- Description of the Purchase Contracts -- Contract Fees". If a holder of a
Unit does not provide cash to settle the underlying Purchase Contract in the
manner described herein, cash proceeds from the QUIPS or other Pledged
Securities underlying such Unit will be applied on the Stock Purchase Date to
the purchase of Common Stock pursuant to such Purchase Contract.
 
                                      S-28
<PAGE>   29
 
     The QUIPS underlying a Normal Unit will constitute Pledged Securities that
will be pledged to the Collateral Agent to secure the holder's obligations to
the Company and the Call Option Holder under the Purchase Contract and Call
Option underlying such Unit. If Treasury Securities are exchanged for Pledged
Securities upon exercise of the Call Options or Junior Subordinated Debentures
are distributed in respect of Pledged Securities upon dissolution of the Trust,
the Treasury Securities so exchanged or the Junior Subordinated Debentures so
distributed will automatically be substituted as Pledged Securities in place of
the securities that theretofore had been Pledged Securities.
 
     Each holder of Units, by acceptance thereof, will, under the terms of the
Principal Agreements and any of the Purchase Contracts and Call Options
underlying such Units, be deemed to have (a) irrevocably agreed to be bound by
the terms of the Principal Agreements and such Purchase Contracts and Call
Options for so long as such holder remains a holder of such Units, and (b) duly
appointed the Unit Agent as such holder's agent and attorney-in-fact to enter
into and perform such Purchase Contracts and Call Options on behalf of and in
the name of such holder.
 
     Subject to applicable law (including, without limitation, United States
federal securities law), the Company or its subsidiaries may at any time and
from time to time purchase outstanding Units by tender, in the open market or by
private agreement.
 
FORMATION OF THE UNITS
 
     At the closing of the offering made hereby, the Underwriters will (a) enter
into Purchase Contracts with the Company and (b) purchase QUIPS from the Trust
for cash. The Underwriters will fund that cash in part by the sale of the Units
offered hereby to the initial investors thereof and in part by the sale of Call
Options (on behalf of such investors) to the Call Option Holder. The Trust will
use the cash received from the sale of the QUIPS to purchase Junior Subordinated
Debentures from the Company. The QUIPS will then be pledged to the Collateral
Agent to secure the obligations owed to the Company under the Purchase Contracts
and the obligations owed to the Call Option Holder under the Call Options. The
rights to purchase Common Stock under a Purchase Contract, together with the
QUIPS or other Pledged Securities pledged to secure the obligations referred to
in (a) and (b) below, subject to (a) the obligations owed to the Company under
such Purchase Contract,(b) the obligations owed to the Call Option Holder under
the Call Option relating to such QUIPS or other Pledged Securities and (c) the
pledge arrangements securing the foregoing obligations, are collectively
referred to herein as a "Normal Unit".
 
     Each holder of Normal Units will have the right, at any time on or prior to
the second Business Day immediately preceding the Stock Purchase Date, to
substitute, as Pledged Securities, Treasury Securities that will generate
payments matching such holder's obligations under the underlying Purchase
Contracts, in return for the securities that theretofore had been the Pledged
Securities underlying such Units. For so long as the Call Options underlying
such Units remain exercisable, such right may be exercised only if the holder
obtains an instrument from the Call Option Holder releasing its security
interest in the Pledged Securities securing such Call Options and agreeing that
such Call Options no longer underlie such Units. The holder might obtain such an
instrument by separately documenting such Call Options with the Call Option
Holder (and, if required by the Call Option Holder, entering into credit support
arrangements satisfactory to the Call Option Holder backing such Call Options),
paying the Call Option Holder to cancel such Call Options or otherwise. However,
the Call Option Holder will be under no obligation to deliver such an
instrument, and there can be assurance that a holder will be able to induce the
Call Option Holder to do so. Therefore, investors may not be able to capitalize
on any appreciation of the QUIPS through this means.
 
     Goldman, Sachs & Co. have advised the Company that, while they are the Call
Option Holder, they will evaluate requests to release their security interests
in the Pledged Securities on a case-by-case basis, taking into account the
market value of the Pledged Securities as compared to the cost to the Call
Option Holder of exercising the Call Options, the availability and amount of
credit support,
 
                                      S-29
<PAGE>   30
 
any payments to be made in connection therewith and other factors pertaining at
the time of any requested release. In doing so, Goldman, Sachs & Co. would
expect that they would not grant such a request unless the value of the payments
and other new rights offered by the holder were no less valuable to Goldman,
Sachs & Co. than the rights they had before granting such request.
 
     If a holder of Normal Units exercises such holder's right to substitute
Treasury Securities for Pledged Securities in the manner described herein, the
securities that theretofore had been the Pledged Securities underlying such
Normal Units will be released from the pledge arrangement described herein and
delivered to such holder, and such holder's remaining rights and obligations
under such Normal Units will thereupon become "Stripped Units" that will no
longer generate cash payments to such holder (other than Contract Fees, if any,
payable by the Company pursuant to the underlying Purchase Contracts) and will
no longer be listed on the NYSE or be fungible with Normal Units.
 
     A holder of Normal Units may exercise the right referred to above by
presenting and surrendering the certificate evidencing such Normal Units, at the
offices of the Unit Agent, together with the "Request to Create Stripped Units"
thereon completed and executed as indicated, and concurrently delivering to the
Collateral Agent (a) Treasury Securities that will generate, on the Stock
Purchase Date, an amount of cash equal to the aggregate Stated Amount of such
Normal Units, (b) Treasury Securities that will generate, on each Quarterly
Payment Date falling after the date of delivery and on or before the Stock
Purchase Date, an amount of cash equal to the aggregate Contract Fees that are
scheduled to be payable by the holder, if any, in respect of the Purchase
Contracts underlying such Normal Units (assuming for this purpose that no
Contract Fees will then have been deferred), (c) if such holder is, at the date
of delivery, deferring Contract Fees payable by such holder in respect of such
Normal Units, an amount of cash equal to (i) the aggregate unpaid amount of such
Contract Fees accrued to the date of delivery, if such date is a Quarterly
Payment Date, and (ii) the aggregate unpaid amount of such Contract Fees accrued
to the Quarterly Payment Date immediately preceding such date of delivery plus
interest thereon at the Deferral Rate for the period from and including such
Quarterly Payment Date to but excluding such date of delivery, if such date is
not a Quarterly Payment Date and (d) if the Call Options underlying any Normal
Units remain exercisable, the instrument from the Call Option Holder referred to
above; provided, however, that if Treasury Securities are the Pledged Securities
underlying such Normal Units, such right must be exercised with respect to a
number of Normal Units that will result in the release of Treasury Securities in
denominations of $1,000 and integral multiples thereof. A certificate
representing the Stripped Units that such Normal Units have become will then be
issued and delivered to such holder or such holder's designee and the securities
that theretofore had been the Pledged Securities underlying such Normal Units
will then be released from the pledge under the Pledge Agreement and delivered
to such holder or such holder's designee, upon payment by the holder of any
transfer or similar taxes payable in connection with the transfer of Units or
the securities that theretofore had been Pledged Securities to any person other
than such holder.
 
     The Normal Units and any Stripped Units are collectively referred to herein
as the "Units."
 
     The Company will enter into (x) an agreement (the "Master Unit Agreement")
with First Union National Bank, as unit agent (together with any successor
thereto in such capacity, the "Unit Agent"), governing the appointment of the
Unit Agent as the agent and attorney-in-fact for the holders of the Units, the
Purchase Contracts, the transfer, exchange or replacement of certificates
representing the Units and certain other matters relating to the Units and (y)
an agreement (the "Pledge Agreement") among the Company, the Collateral Agent
and the Call Option Holder creating a pledge and security interest for the
benefit of the Company to secure the obligations of holders of Units under the
Purchase Contracts and a pledge and security interest for the benefit of the
Call Option Holder to secure the obligations of the holders of Units under the
Call Options. In addition the Unit Agent will enter into an agreement (the "Call
Option Agreement") with the Call Option Holder governing the Call Options. The
Master Unit Agreement, the Pledge Agreement and the Call Option Agreement are
collectively referred to herein as the "Principal Agreements".



                                      S-30
<PAGE>   31
 
DESCRIPTION OF THE PURCHASE CONTRACTS
 
  General
 
     The Purchase Contracts will be governed by the Master Unit Agreement.
 
     Each Purchase Contract underlying a Unit (unless earlier terminated) will
require the holder of such Unit to purchase, and the Company to sell, on the
Stock Purchase Date, for cash in an amount equal to the Stated Amount, a number
of newly issued shares of Common Stock equal to the Settlement Rate. The
Settlement Rate will be calculated as follows (subject to adjustment under the
circumstances described below under "-- Anti-Dilution Adjustments"):
 
     (a) if the Applicable Market Value is greater than or equal to the
Threshold Appreciation Price of $          (i.e., approximately      % higher
than the Stated Amount), the Settlement Rate will be                ;
 
     (b) if the Applicable Market Value is less than the Threshold Appreciation
Price but greater than the Stated Amount, the Settlement Rate will equal the
Stated Amount divided by the Applicable Market Value (i.e., the Settlement Rate
will be calculated so that the Applicable Market Value of the Common Stock
purchasable under each Purchase Contract would equal the Stated Amount payable
therefor) rounded to the nearest 1/10,000th of a share; and
 
     (c) if the Applicable Market Value is less than or equal to the Stated
Amount, the Settlement Rate will be one.
 
     "Applicable Market Value" means the average of the Closing Prices per share
of Common Stock on each of the twenty consecutive Trading Days ending on the
last Trading Day immediately preceding the Stock Purchase Date. "Closing Price"
of the Common Stock on any date of determination means the closing sale price
(or, if no closing price is reported, the last reported sale price) of the
Common Stock on the NYSE on such date, or if the Common Stock is not listed for
trading on the NYSE on any such date, as reported in the composite transactions
for the principal United States securities exchange on which the Common Stock is
so listed, or if the Common Stock is not so listed on a United States national
or regional securities exchange, as reported by The Nasdaq Stock Market, or if
the Common Stock is not so reported, the last quoted bid price of the Common
Stock in the over-the-counter market as reported by the National Quotation
Bureau or similar organization, or if such bid price is not available, the
market value of the Common Stock on such date as determined by a nationally
recognized investment banking firm retained for this purpose by the Company. A
"Trading Day" means a day on which the Common Stock (a) is not suspended from
trading on any national or regional securities exchange or association or
over-the-counter market at the close of business and (b) has traded at least
once on the national or regional securities exchange or association or
over-the-counter market that is the primary market for the trading of the Common
Stock.
 
     No fractional shares of Common Stock will be issued by the Company pursuant
to the Purchase Contracts. In lieu of a fraction of a share otherwise issuable
in respect of Purchase Contracts being settled by a holder of Units, the holder
will be entitled to receive an amount of cash equal to such fraction times the
Applicable Market Value.
 
     Prior to the Stock Purchase Date, the Common Stock purchasable on
settlement of Purchase Contracts will not be deemed to be outstanding for any
purpose and no holder of Units will have any voting rights, rights to dividends
or other distributions or other rights or privileges of a stockholder of the
Company by virtue of holding such Units.
 
  Settlement
 
     In order to settle the Purchase Contracts underlying any Units, the holder
of such Units shall, by no later than 10:00 a.m., New York City time, on the
Stock Purchase Date, deliver payment (in the
 
                                      S-31
<PAGE>   32
 
form of a certified or cashier's check payable to the order of the Company in
immediately available funds), at the offices of the Unit Agent, of an amount
equal to the aggregate Stated Amount of such Units (plus, if there are unpaid
Contract Fees accrued on such Purchase Contracts and payable by the holder on
the Stock Purchase Date and the cash received by the Collateral Agent on such
date in respect of the Pledged Securities securing such Purchase Contracts is
less than the amount of such unpaid Contract Fees, an amount sufficient to cover
such short-fall), provided, however, that the holder's obligation to satisfy
such Purchase Contracts may be offset by any amounts due and owing by the
Company to such holder. The Common Stock purchased on settlement of such
Purchase Contracts will then be issued and delivered to such holder or such
holder's designee and the Pledged Securities securing such Purchase Contracts
(or, in the case of Treasury Securities, the proceeds from the payment of such
Treasury Securities at maturity, net of any unpaid Contract Fees payable by the
holder accrued thereon to the Stock Purchase Date) will then be released from
the pledge under the Pledge Agreement and delivered to such holder or such
holder's designee, upon presentation and surrender of the certificate evidencing
such Units and payment by the holder of any transfer or similar taxes payable in
connection with the issuance of Common Stock or the transfer of Pledged
Securities to any person other than such holder.
 
     On the Stock Purchase Date, if a holder of Units has not delivered cash to
settle the underlying Purchase Contracts in the manner described above and no
event described under "-- Termination" below has occurred, then (a) the Unit
Agent will notify the Collateral Agent and (i) if QUIPS underlie such Units, the
Collateral Agent, on behalf of such holder, will exercise such holder's right to
require the Trust to distribute Junior Subordinated Debentures having an
aggregate principal amount equal to the aggregate Liquidation Amount of such
QUIPS, in exchange for such QUIPS, and, upon receiving such Junior Subordinated
Debentures, will thereupon, as Put Agent, exercise the Junior Subordinated
Debenture Put Option with respect thereto (see "-- Description of the QUIPS --
Right to Exercise Junior Subordinated Debenture Put Options" and "-- Description
of the Junior Subordinated Debentures -- Junior Subordinated Debenture Put
Options") and (ii) if Junior Subordinated Debentures underlie such Units, the
Collateral Agent, on behalf of such holder, will, as Put Agent, exercise the
Junior Subordinated Debenture Put Option with respect thereto (see " Description
of the Junior Subordinated Debentures -- Junior Subordinated Debenture Put
Options"), (b) a portion of the proceeds from the exercise of such Junior
Subordinated Debenture Put Option (or, if Treasury Securities underlie such
Units, a portion of the proceeds from the payment of such Treasury Securities at
maturity) will be applied to satisfy in full such holder's obligation to
purchase Common Stock under such Purchase Contracts and to pay any unpaid
Contract Fees payable by such holder accrued thereon to the Stock Purchase Date
(it being understood that the holder's obligation to satisfy any unpaid Contract
Fees may be offset by any amounts due and owing by the Company to such holder)
and (c) the remainder of such proceeds, if any, will be paid to such holder.
Such Common Stock will then be issued and delivered to such holder or such
holder's designee, upon presentation and surrender of the certificate evidencing
such Units and payment by the holder of any transfer or similar taxes payable in
connection with the issuance of Common Stock to any person other than such
holder.
 
  Contract Fees
 
     The holders of Units may be required to pay Contract Fees to the Company,
or the Company may be required to pay Contract Fees to the holders of Units, as
specified in the final Prospectus Supplement for the offering made hereby.
 
     Any obligation of the holders of Units to pay Contract Fees to the Company
will be funded out of payments made in respect of the Pledged Securities. If
payments made in respect of the Pledged Securities are insufficient to cover the
obligation of the holders of the Units to pay Contract Fees, such obligation
will be deferred until the earlier of the date sufficient cash is available and
the Stock Purchase Date. In the event that holders of Units are required to pay
Contract Fees to the Company, it is unlikely such holders will be entitled to a
current deduction for such payments. As a result,
 
                                      S-32
<PAGE>   33
 
although the amount of cash distributions made to holders will be reduced by the
amount of Contract Fees payable to the Company, holders will nevertheless
recognize income each quarter equal to the full amount of OID accrued with
respect to the QUIPS, subject to certain adjustments. See "Certain Federal
Income Tax Consequences -- Contract Fees".
 
     Any obligation of the Company to pay Contract Fees to the holder of Units
will be subordinated and junior in right of payment to the Company's obligations
under its Senior Indebtedness, in a manner substantially similar to the manner
in which the Junior Subordinated Debentures are subordinated as described under
"-- Description of the Junior Subordinated Debentures" below. So long as no
default in the Company's obligations under the Principal Agreements has occurred
and is continuing, the Company will have the right to defer the payment of
Contract Fees at any time or from time to time for a period not extending beyond
the Stock Purchase Date; provided, however, that in order to exercise such
right, the Company must give the Unit Agent notice at least five Business Days
prior to the earlier of (a) the date such payment would otherwise have been
payable, (b) the date the Company is required to give notice to any securities
exchange or to holders of Units of the record date or the date such payment is
payable and (c) such record date. During any such deferral period, the Company
may not take any of the actions that it would be prohibited from taking during
an Extension Period as described under "-- Description of the Junior
Subordinated Debentures -- Option to Extend Interest Payment Date" below.
 
     Contract Fees will be payable at the Contract Fee Rate set forth under
"-- General" above. Any deferred Contract Fees will bear additional Contract
Fees at the Deferral Rate (compounding on each succeeding Quarterly Payment
Date) until paid. Contract Fees payable for any period will be computed on the
basis of a 360-day year of twelve 30-day months. Contract Fees will accrue from
and including the date of issuance of the Units to but excluding the Stock
Purchase Date and will be payable in arrears on the Quarterly Payment Dates
(unless deferred as described above). If the Purchase Contracts are terminated,
the right of holders of Units to receive Contract Fees or the obligation of
holders of Units to pay Contract Fees (including any deferred Contract Fees)
will also terminate.
 
  Anti-Dilution Adjustments
 
     The formula for determining the Settlement Rate will be subject to
adjustment upon the occurrence of certain events, including: (a) the payment of
dividends (and other distributions) of Common Stock on Common Stock; (b) the
issuance to all holders of Common Stock of rights, warrants or options entitling
them, for a period of up to 45 days, to subscribe for or purchase Common Stock
at less than the Current Market Price (as defined) thereof; (c) subdivisions and
combinations of Common Stock; (d) distributions to all holders of Common Stock
of evidences of indebtedness of the Company, securities, cash or other assets
(excluding any dividend or distribution covered by clause (a) or (b) above and
any dividend or distribution paid exclusively in cash); (e) distributions
consisting exclusively of cash to all holders of Common Stock in an aggregate
amount that, when combined with (i) other all-cash distributions made within the
preceding 12 months and (ii) the cash and the fair market value, as of the date
of expiration of the tender or exchange offer referred to below, of the
consideration paid in respect of any tender or exchange offer by the Company or
a subsidiary for the Common Stock concluded within the preceding 12 months,
exceeds      % of the Company's aggregate market capitalization (such aggregate
market capitalization being the product of the Current Market Price of the
Common Stock multiplied by the number of shares of Common Stock then
outstanding) on the date fixed for the determination of stockholders entitled to
receive such distribution; and (f) the successful completion of a tender or
exchange offer made by the Company or any subsidiary for the Common Stock which
involves an aggregate consideration that, when combined with (i) any cash and
the fair market value of other consideration payable in respect of any tender or
exchange offer by the Company or a subsidiary for the Common Stock concluded
within the preceding 12 months and (ii) the aggregate amount of any all-cash
distributions to all holders of the Company's Common
 
                                      S-33
<PAGE>   34
 
Stock made within the preceding 12 months, exceeds      % of the Company's
aggregate market capitalization on the date of expiration of such tender or
exchange offer. The "Current Market Price" per share of Common Stock on any day
means the average of the daily Closing Prices for the five consecutive Trading
Days selected by the Company commencing not more than 20 Trading Days before,
and ending not later than, the earlier of the day in question and the day before
the "ex date" with respect to the issuance or distribution requiring such
computation. For purposes of this paragraph, the term "ex date", when used with
respect to any issuance or distribution, shall mean the first date on which the
Common Stock trades on such exchange or in such market without the right to
receive such issuance or distribution.
 
     In the case of certain reclassifications, consolidations, mergers, sales or
transfers of assets or other transactions pursuant to which the Common Stock is
converted into the right to receive other securities, cash or property, each
Purchase Contract then outstanding would, without the consent of the holders of
Units, become a contract to purchase only the kind and amount of securities,
cash and other property receivable upon consummation of the transaction by a
holder of the number of shares of Common Stock which would have been received by
the holder of the related Unit immediately prior to such transaction if such
holder had then settled such Purchase Contract.
 
     If at any time the Company makes a distribution of property to its
stockholders which would be taxable to such stockholders as a dividend for
United States federal income tax purposes (i.e., distributions of evidences of
indebtedness or assets of the Company, but generally not stock dividends or
rights to subscribe to capital stock) and, pursuant to the Settlement Rate
adjustment provisions of the Master Unit Agreement, the Settlement Rate is
increased, such increase may be deemed to be the receipt of taxable income to
holders of Units. See "Certain Federal Income Tax Consequences -- Adjustment of
Settlement Rate".
 
     In addition, the Company may make such increases in the Settlement Rate as
the Board of Directors of the Company deems advisable to avoid or diminish any
income tax to holders of shares of Common Stock resulting from any dividend or
distribution of stock (or rights to acquire stock) or from any event treated as
such for income tax purposes or for any other reasons.
 
     Adjustments to the Settlement Rate will be calculated to the nearest
1/10,000th of a share. No adjustment in the Settlement Rate shall be required
unless such adjustment would require an increase or decrease of at least one
percent in the Settlement Rate; provided, however, that any adjustments which by
reason of the foregoing are not required to be made shall be carried forward and
taken into account in any subsequent adjustment.
 
     The Company will be required, within ten Business Days following the
occurrence of an event that requires or permits an adjustment in the Settlement
Rate, to provide written notice to the holders of Units of the occurrence of
such event and a statement in reasonable detail setting forth the method by
which the adjustment to the Settlement Rate was determined and setting forth the
revised Settlement Rate.
 
  Termination
 
     The Purchase Contracts, and the rights and obligations of the Company and
of the holders of the Units thereunder (including any right to receive or
obligation to pay Contract Fees or deferred Contract Fees thereunder and the
right and obligation of the holders to purchase and the Company to sell Common
Stock thereunder), will automatically terminate upon the occurrence of certain
events of bankruptcy, insolvency or reorganization with respect to the Company.
Upon such termination, the Call Options will terminate and the Pledged
Securities will be distributed in the manner described under "-- Pledged
Securities and Pledge Agreement -- Termination of Purchase Contracts".
 
                                      S-34
<PAGE>   35
 
DESCRIPTION OF THE CALL OPTIONS
 
     At the closing of the Offering made hereby, the Underwriters (on behalf of
the initial investors in the Units) will sell the Call Options to the Call
Option Holder at a price equal to $     per Call Option. The Call Options will
be governed by the Call Option Agreement.
 
     Each Call Option underlying a Normal Unit (unless earlier terminated), when
aggregated with the Call Options underlying all other Normal Units, will entitle
the Call Option Holder to acquire the QUIPS underlying the Normal Units (or the
Junior Subordinated Debentures substituted therefor), on or before the Call
Option Expiration Date, in exchange for the Aggregate Call Option Exercise
Consideration. The Aggregate Call Option Exercise Consideration will be
comprised of:
 
     (a) Treasury Securities that will generate, by each Quarterly Payment Date
falling after the settlement date for the Call Options (the "Call Settlement
Date") and on or before the Stock Purchase Date, an amount of cash equal to the
aggregate distributions or interest payments that are scheduled to be payable in
respect of the QUIPS or Junior Subordinated Debentures underlying the Normal
Units on such Quarterly Payment Date (assuming for this purpose, even if not
true, that (i) no distributions or interest payments will then have been
deferred and (ii) the distribution or interest rate thereon remains at the
initial QUIPS and Debenture Rate);
 
     (b) Treasury Securities that will generate, by the Stock Purchase Date, an
amount of cash equal to the aggregate Stated Amount of the Normal Units; and
 
     (c) if the Company is, at the Call Settlement Date, deferring distributions
on the QUIPS or interest payments on the Junior Subordinated Debentures (see
"-- Description of the QUIPS -- Distributions" and "-- Description of the Junior
Subordinated Debentures -- Option to Extend Interest Payment Date"), an amount
in cash equal to (i) the aggregate unpaid distributions on the QUIPS or interest
payments on the Junior Subordinated Debentures underlying the Normal Units
accrued to the Call Settlement Date, if the Call Settlement Date is a Quarterly
Payment Date, and (ii) the aggregate unpaid distributions on the QUIPS or
interest payments on the Junior Subordinated Debentures underlying the Normal
Units accrued to the Quarterly Payment Date immediately preceding the Call
Settlement Date plus interest thereon at the Deferral Rate for the period from
and including such Quarterly Payment Date to but excluding such Call Settlement
Date, if the Call Settlement Date is not a Quarterly Payment Date.
 
     The Call Option Holder may exercise all of its Call Options (but not less
than all) by (a) delivering to the Unit Agent and the Collateral Agent, on or
prior to the Call Settlement Date, a notice stating that the Call Option Holder
is exercising its Call Options and specifying the Call Settlement Date therefor
(which may not be after the Call Option Expiration Date) and (b) delivering to
the Collateral Agent, by Noon, New York City time, on the Call Settlement Date,
the Aggregate Call Option Exercise Consideration. Pursuant to the Pledge
Agreement, upon receipt by the Collateral Agent of the Aggregate Call Option
Exercise Consideration, the Collateral Agent will transfer the QUIPS (or Junior
Subordinated Debentures which have been substituted therefor) underlying the
Normal Units to the Call Option Holder or its designee free and clear of the
pledge and security interest created by the Pledge Agreement and the Treasury
Securities included in the Aggregate Call Option Exercise Consideration shall
automatically be substituted for the QUIPS (or Junior Subordinated Debentures)
as Pledged Securities, whereupon the Call Option Holder shall cease to have a
security interest in the Pledged Securities.
 
     If the Call Options are exercised, the Unit Agent shall, not later than
three Business Days following the Call Settlement Date, mail notice of such
exercise to the holders of the Normal Units.
 
     The Call Options, and the rights and obligations of the Call Option Holder
and of the holders of the Units thereunder, will automatically terminate upon
the occurrence of certain events of bankruptcy, insolvency or reorganization
with respect to the Company. See "-- Description of the
 
                                      S-35
<PAGE>   36
 
Purchase Contracts -- Termination" and "-- Pledged Securities and Pledge
Agreement -- Termination of Purchase Contracts".
 
PLEDGED SECURITIES AND PLEDGE AGREEMENT
 
  General
 
     Pursuant to the Pledge Agreement, the Pledged Securities will be pledged to
the Collateral Agent, for the benefit of the Company and the Call Option Holder,
to secure (a) the obligations of holders of Units to purchase Common Stock under
the Purchase Contracts, (b) the obligations, if any, of the holders of Units to
pay Contract Fees to the Company and (c) the obligations of holders of Normal
Units to deliver the underlying QUIPS (or Junior Subordinated Debentures) to the
Call Option Holder if the Call Options are exercised. The Pledged Securities
will initially consist of the QUIPS. If Treasury Securities are exchanged for
Pledged Securities upon exercise of the Call Options or in connection with the
creation of Stripped Units or Junior Subordinated Debentures are distributed in
respect of Pledged Securities upon dissolution of the Trust, the Treasury
Securities so exchanged or the Junior Subordinated Debentures so distributed
will automatically be substituted as Pledged Securities in place of the
securities that theretofore had been Pledged Securities and the securities that
theretofore had been Pledged Securities will automatically be released from the
pledge and security interest created by the Pledge Agreement.
 
     The rights of the holders of the Units to the underlying Pledged Securities
will be subject to the pledge and security interest created by the Pledge
Agreement; no holder of Units will be permitted to withdraw the Pledged
Securities underlying such Units from the pledged arrangement except upon the
settlement or termination of the Purchase Contracts or as described under
"-- Formation of the Units" above. Subject to such pledge and security interest,
however, each holder of Units will have full beneficial ownership of the
underlying Pledged Securities and will be entitled (directly or through the
Collateral Agent) to all of the rights provided by such Pledged Securities, and
the Company and Call Option Holder will have no rights with respect to Pledged
Securities other than their respective security interests therein.
 
  Quarterly Payments on Pledged Securities
 
     The Collateral Agent will, upon receipt of any quarterly distributions or
payments of interest on the Pledged Securities, (a) pay to the Company an amount
therefrom equal to the aggregate Contract Fees, if any, then due from the
holders of the Units to the Company and (b) pay the remainder to the Unit Agent,
which will, in turn, distribute that amount to the holders of Units on the
Record Date. As long as the Units remain in book-entry only form, the Record
Date for any payment will be one Business Day prior to such payment date.
 
  Substitution of Pledged Securities
 
     For a description of the right of a holder of Units to substitute Treasury
Securities for Pledged Securities, see "-- Formation of the Units" above.
 
  Settlement of Purchase Contracts
 
     On the Stock Purchase Date, the Pledged Securities (or, in the case of
Treasury Securities, the proceeds from the payment of such Treasury Securities
at maturity) will be released from the pledge and security interest created by
the Pledge Agreement and distributed or delivered as specified under
"-- Description of the Purchase Contracts -- Settlement".
 
  Termination of Purchase Contracts
 
     Upon termination of the Purchase Contacts (see "-- Description of the
Purchase Contracts -- Termination"), the Collateral Agent will release the
Pledged Securities underlying the Units to the
 
                                      S-36
<PAGE>   37
 
Unit Agent for distribution to the holders of such Units, upon presentation and
surrender of the certificates evidencing such Units. If upon such termination
any holder would otherwise be entitled to receive a principal amount of Treasury
Securities of any series that is not an integral multiple of $1,000, the Unit
Agent will distribute to such holder Treasury Securities of such series in a
principal amount equal to the next lower integral multiple of $1,000, will sell
the Treasury Securities of such series not otherwise distributed to such holder
(together with the Treasury Securities of such series not otherwise distributed
to other holders) and will distribute to all such holders (in accordance with
their respective interests therein) the net proceeds therefrom.
 
BOOK-ENTRY SYSTEM
 
     The Depository Trust Company (the "Depositary") will act as securities
depositary for the Units. The Units will be issued only as fully-registered
securities registered in the name of Cede & Co. or another nominee of the
Depositary. Fully-registered global security certificates ("Global Security
Certificates"), representing the total aggregate number of Units, will be
issued, will be deposited with the Depositary and will bear a legend regarding
the restrictions on exchanges and registration of transfer thereof referred to
below.
 
     The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of securities in definitive form. Such laws
may impair the ability to transfer beneficial interests in the Units so long as
such Units are represented by Global Security Certificates.
 
     The Depositary is a limited-purpose trust company organized under the New
York Banking Law, a "banking organization" within the meaning of the New York
Banking Law, a member of the Federal Reserve System, a "clearing corporation"
within the meaning of the New York Uniform Commercial Code and a "clearing
agency" registered pursuant to the provisions of Section 17A of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"). The Depositary holds
securities that its participants ("Participants") deposit with the Depositary.
The Depositary also facilitates the settlement among Participants of securities
transactions, such as transfers and pledges, in deposited securities through
electronic computerized book-entry changes in Participants' accounts, thereby
eliminating the need for physical movement of securities certificates. Direct
Participants include securities brokers and dealers, banks, trust companies,
clearing corporations and certain other organizations ("Direct
Participants").The Depositary is owned by a number of its Direct Participants
and by the NYSE, the American Stock Exchange, Inc., and the National Association
of Securities Dealers, Inc. Access to the Depositary system is also available to
others, such as securities brokers and dealers, banks and trust companies that
clear transactions through or maintain a direct or indirect custodial
relationship with a Direct Participant either directly or indirectly ("Indirect
Participants"). The rules applicable to the Depositary and its Participants are
on file with the Commission.
 
     No Units represented by Global Security Certificates may be exchanged in
whole or in part for Units registered, and no transfer of Global Security
Certificates in whole or in part may be registered, in the name of any person
other than the Depositary or a nominee of the Depositary unless the Depositary
has notified the Company that it is unwilling or unable to continue as
depositary for such Global Security Certificates or has ceased to be qualified
to act as such as required by the Master Unit Agreement or there shall have
occurred and be continuing a default by the Company in respect of its
obligations under one or more Principal Agreements. All Units represented by
Global Security Certificates or any portion thereof will be registered in such
names as the Depositary may direct.
 
     As long as the Depositary or its nominee is the registered owner of the
Global Security Certificates, such Depositary or such nominee, as the case
maybe, will be considered the sole owner and holder of the Global Security
Certificates and all Units represented thereby for all purposes under the Units,
Purchase Contracts, Call Options and Principal Agreements. Except in the limited
circumstances referred to above, owners of beneficial interests in Global
Security
 
                                      S-37
<PAGE>   38
 
Certificates will not be entitled to have such Global Security Certificates or
the Units represented thereby registered in their names, will not receive or be
entitled to receive physical delivery of certificates in exchange therefor and
will not be considered to be owners or holders of such Global Security
Certificates or any Units represented thereby for any purpose under the Units,
Purchase Contracts, Call Options and Principal Agreements. All payments on the
Units represented by the Global Security Certificates and all deliveries of
Pledged Securities or Common Stock to the holders thereof will be made to the
Depositary or its nominee, as the case may be, as the holder thereof.
 
     Ownership of beneficial interests in the Global Security Certificates will
be limited to Participants or persons that may hold beneficial interests through
institutions that have accounts with the Depositary. Ownership of beneficial
interests in Global Security Certificates will be shown only on, and the
transfer of those ownership interests will be effected only through, records
maintained by the Depositary or its nominee (with respect to Participants'
interests) or any such Participant (with respect to interests of persons held by
such Participants on their behalf). Procedures for settlement of Purchase
Contracts on the Stock Purchase Date will be governed by arrangements among the
Depositary, Participants and persons that may hold beneficial interests through
Participants designed to permit such settlement without the physical movement of
certificates. Payments, transfers, deliveries, exchanges and other matters
relating to beneficial interests in Global Security Certificates may be subject
to various policies and procedures adopted by the Depositary from time to time.
The Depositary has advised the Company that it will take any action permitted to
be taken by a holder of Units only at the direction of one or more Participants
to whose account the Depositary interests in the Global Security Certificates
are credited and only in respect of such number of Units as to which such
Participant or Participants has or have given such direction. None of the
Company, the Trust, the Unit Agent or any agent of the Company, the Trust or the
Unit Agent will have any responsibility or liability for any aspect of the
Depositary's or any Participant's records relating to, or for payments made on
account of, beneficial interests in Global Security Certificates, or for
maintaining, supervising or reviewing any of the Depositary's records or any
Participant's records relating to such beneficial ownership interests.
 
     The information in this section concerning the Depositary and its
book-entry system has been obtained from sources that the Company and the Trust
believe to be reliable, but neither the Company nor the Trust takes
responsibility for the accuracy thereof.
 
CERTAIN PROVISIONS OF THE PRINCIPAL AGREEMENTS
 
  General
 
     Distributions on the Units will be payable, Purchase Contracts (and
documents related thereto) will be settled and transfers of the Units will be
registrable at the office of the Unit Agent in the Borough of Manhattan, The
City of New York. In addition, in the event that the Units do not remain in
book-entry form, payment of distributions on the Units may be made, at the
option of the Company, by check mailed to the address of the persons entitled
thereto as shown on the Unit Register.
 
     In the event that any Quarterly Payment Date, the Stock Purchase Date or
any Put Date is not a Business Day, then payment of the Contract Fees payable on
any such Quarterly Payment Date or settlement of the Purchase Contracts or the
Junior Subordinated Debenture Put Option, as the case may be, will be made on
the next succeeding day which is a Business Day (and so long as such payment is
made on such next succeeding Business Day, without any interest or other payment
in respect of any such delay), except that if such Business Day is in the next
succeeding calendar year, such payment or settlement will be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such payment date. A "Business Day" shall mean any day other than
Saturday, Sunday or any other day on which banking institutions in The City of
New York are authorized or obligated by law or executive order to be closed.
 
     If a holder of Units fails to present and surrender the certificate
evidencing such Units to the Unit Agent on the Stock Purchase Date, the shares
of Common Stock issuable in settlement of the
 
                                      S-38
<PAGE>   39
 
related Purchase Contracts will be registered in the name of the Unit Agent and,
together with any distributions thereon, shall be held by the Unit Agent as
agent for the benefit of such holder, until such certificate is presented and
surrendered or the holder provides satisfactory evidence that such certificate
has been destroyed, lost or stolen, together with any indemnity that may be
required by the Unit Agent and the Company.
 
     If the Purchase Contracts have terminated prior to the Stock Purchase Date,
the related Pledged Securities have been transferred to the Unit Agent for
distribution to the holders entitled thereto and a holder of Units fails to
present and surrender the certificate evidencing such Units to the Unit Agent,
the Pledged Securities otherwise deliverable to such holder and payments thereon
shall be held by the Unit Agent as agent for the benefit of such holder, until
such certificate is presented and surrendered or the holder provides the
evidence and indemnity described above.
 
     The Unit Agent will have no obligation to invest or to pay interest on any
amounts held by the Unit Agent pending distribution.
 
     No service charge will be made for any registration of transfer or exchange
of the Units, except for any tax or other governmental charge that maybe imposed
in connection therewith.
 
  Modification
 
     The Principal Agreements will contain provisions permitting the parties
thereto, with the consent of the holders of in excess of 50% of the Units at the
time outstanding (or, in the case of modifications affecting only holders of
Normal Units or Stripped Units, the consent of the holders of in excess of 50%
of the Normal Units or Stripped Units, as the case may be), to modify the terms
of the Principal Agreements, the Purchase Contracts and the Call Options, except
that no such modification may, without the consent of the holder of each
outstanding Unit affected thereby, (a) change any payment date, (b) change the
amount or type of Pledged Securities required to be pledged to secure
obligations under the Units, impair the right of the holder of any Units to
receive distributions on the Pledged Securities underlying such Units or
otherwise adversely affect the holder's rights in or to such Pledged Securities,
(c) change the place or currency of payment for any Contract Fees or other
amounts payable in respect of the Units, increase any Contract Fees or other
amounts payable by holders in respect of Units or decrease any other amounts
receivable by holders in respect of Units, (d) impair the right to institute
suit for the enforcement of any Purchase Contract, (e) reduce the amount of
Common Stock purchasable under any Purchase Contract, increase the price to
purchase Common Stock on settlement of any Purchase Contract, change the Stock
Purchase Date or otherwise adversely affect the holder's rights under any
Purchase Contract, (f) reduce the amount payable on exercise of any Call Option,
extend the Call Option Expiration Date or otherwise adversely affect the
holder's rights under any Call Option or (g) reduce the above-stated percentage
of outstanding Units the consent of whose holders is required for the
modification or amendment of the provisions of the Principal Agreements, the
Purchase Contracts or the Call Options.
 
  Consolidation, Merger, Sale or Conveyance
 
     The Company will covenant in the Master Unit Agreement that it will not
merge with or into or consolidate with any other entity or sell, assign,
transfer, lease or convey all or substantially all of its properties and assets
to any person, firm or corporation unless the Company is the continuing
corporation or the successor corporation is a corporation organized under the
laws of the United States of America or a state thereof and such corporation
expressly assumes the obligations of the Company under the Principal Agreements
and the Purchase Contracts, and the Company or such successor corporation is
not, immediately after such merger, consolidation, sale, assignment, transfer,
lease or conveyance, in default in the performance of any of its obligations
thereunder.
 
                                      S-39
<PAGE>   40
 
  Title
 
     The Company, the Unit Agent, the Collateral Agent and the Call Option
Holder may treat the registered holder of any Units as the absolute owner
thereof for the purpose of making payment and settling the related Purchase
Contracts or Call Options and for all other purposes.
 
  Replacement of Units Certificates
 
     In the event that physical certificates have been issued, any mutilated
certificate evidencing Units will be replaced by the Company at the expense of
the holder upon surrender of such certificate to the Unit Agent. Certificates
that become destroyed, lost or stolen will be replaced by the Company at the
expense of the holder upon delivery to the Company and the Unit Agent of
evidence of the destruction, loss or theft thereof satisfactory to the Company
and the Unit Agent. In the case of a destroyed, lost or stolen certificate, an
indemnity satisfactory to the Unit Agent and the Company may be required at the
expense of the holder of the Units evidenced by such certificate before a
replacement will be issued.
 
     Notwithstanding the foregoing, the Company will not be obligated to issue
any certificates representing Units on or after the Stock Purchase Date or after
the Purchase Contracts have terminated. In lieu of the delivery of a replacement
certificate following the Stock Purchase Date, the Unit Agent, upon delivery of
the evidence and indemnity described above, will deliver the Common Stock
issuable pursuant to the Purchase Contracts included in the Units evidenced by
such certificate, or, if the Purchase Contracts have terminated prior to the
Stock Purchase Date, transfer the Pledged Securities related to the Units
evidenced by such certificate.
 
  Governing Law
 
     The Principal Agreements, the Purchase Contracts and the Call Options will
be governed by, and construed in accordance with, the laws of the State of New
York.
 
  Information Concerning the Unit Agent
 
     First Union National Bank will initially act as Unit Agent. The Unit Agent
will act as the agent for the holders of Units from time to time. The Master
Unit Agreement will not obligate the Unit Agent to exercise any discretionary
actions in connection with a default under the terms of the Principal
Agreements, the Purchase Contracts, the Call Options or the Pledged Securities.
 
     The Master Unit Agreement will contain provisions limiting the liability of
the Unit Agent. The Master Unit Agreement will contain provisions under which
the Unit Agent may resign or be replaced. Such resignation or replacement would
be effective upon the appointment of a successor.
 
  Information Concerning the Collateral Agent
 
     The Chase Manhattan Bank will initially act as Collateral Agent. The
Collateral Agent will act solely as the agent of the Company or the Call Option
Holder and will not assume any obligation or relationship of agency or trust for
or with any of the holders of the Units except for the obligations owed by a
pledgee of property to the owner thereof under the Pledge Agreement and
applicable law.
 
     The Pledge Agreement will contain provisions limiting the liability of the
Collateral Agent. The Pledge Agreement will contain provisions under which the
Collateral Agent may resign or be replaced. Such resignation or replacement
would be effective upon the appointment of a successor.
 
                                      S-40
<PAGE>   41
 
DESCRIPTION OF THE QUIPS
 
  General
 
     The QUIPS will be issued by the Trust, a statutory business trust created
under Delaware law pursuant to the Declaration. The Trust's affairs are
conducted by the Issuer Trustees, which are currently First Union National Bank,
as the Property Trustee, and First Union Trust Company, as the Delaware Trustee,
and the three Administrators, who are employees of the Company. The Trust exists
for the exclusive purposes of (a) issuing and selling the Trust Securities
consisting of the QUIPS and the Common Trust Securities, (b) using the proceeds
from the sale of the Trust Securities to acquire the Junior Subordinated
Debentures issued by the Company and (c) engaging in only those other activities
necessary or incidental thereto. Accordingly, the Junior Subordinated Debentures
will be the sole assets of the Trust, and payments under the Junior Subordinated
Debentures will be the sole revenue of the Trust. All of the Common Trust
Securities will be owned by the Company.
 
     The QUIPS will represent preferred undivided beneficial interests in the
assets of the Trust and the holders thereof will be entitled to a preference
over the Common Trust Securities in certain circumstances with respect to
distributions and amounts payable on redemption of the Trust Securities or
liquidation of the Trust. See "-- Subordination of Common Trust Securities"
below. The QUIPS will be issued pursuant to, and be governed by, the
Declaration. The Declaration will be qualified under the Trust Indenture Act.
 
     Each QUIPS will have a Liquidation Amount that is equal to the Stated
Amount. The QUIPS will rank pari passu, and payments will be made thereon pro
rata, with the Common Trust Securities except as described under
"-- Subordination of Common Trust Securities" below. Legal title to the Junior
Subordinated Debentures will be held by the Property Trustee in trust for the
benefit of the holders of the QUIPS and the Common Trust Securities.
 
     The QUIPS will be subject to mandatory redemption on the QUIPS and
Debenture Maturity Date at a redemption price equal to the aggregate Liquidation
Amount thereof plus unpaid distributions accrued thereon to but excluding such
date, out of the proceeds of the repayment of the Junior Subordinated Debentures
at maturity. The Junior Subordinated Debentures are not redeemable at the option
of the Company prior to the QUIPS and Debenture Maturity Date.
 
  Distributions
 
     Distributions on the QUIPS will be cumulative, will accumulate from the
first date of issuance of the QUIPS at an initial rate of   % per annum (i.e.,
the initial QUIPS and Debenture Rate, which rate is subject to increase in the
manner described under "-- Description of the Junior Subordinated Debentures --
Market Rate Increase" below) as applied to the Liquidation Amount thereof and
will be payable quarterly in arrears on each Quarterly Payment Date (subject to
the deferral provisions described below), to the holders of record on the
relevant record dates. Unless the QUIPS are not Pledged Securities and are
issued in certificated form, the record date for any payment of Distributions
will be one Business Day prior to such payment date. The amount of Distributions
payable for any period will be computed on the basis of a 360-day year of twelve
30-day months. In the event that any date on which Distributions are payable on
the QUIPS is not a Business Day, payment of the Distributions payable on such
date will be made on the next succeeding day that is a Business Day (and without
any interest or other payment in respect of any such delay), except that if such
Business Day is in the next succeeding calendar year, such payment will be made
on the immediately preceding Business Day, in each case with the same force and
effect as if made on the date such payment was originally payable (each date on
which Distributions are payable in accordance with the foregoing, a
"Distribution Date").
 
     So long as no Debenture Event of Default shall have occurred and be
continuing, the Company will have the right under the Indenture to elect to
defer the payment of interest on the Junior
 
                                      S-41
<PAGE>   42
 
Subordinated Debentures at any time and from time to time for a period not
extending beyond the QUIPS and Debenture Maturity Date (each such period of
deferral, an "Extension Period"). See "-- Description of the Junior Subordinated
Debentures -- Option to Extend Interest Payment Date" and "Certain Federal
Income Tax Consequences -- Interest Received on the QUIPS". Upon any such
election, quarterly Distributions on the QUIPS will be deferred by the Trust
during such Extension Period. Distributions to which holders of the QUIPS are
entitled during any such Extension Period will accumulate additional
Distributions thereon at the Deferral Rate, compounded on each succeeding
Distribution Date. The term "Distributions", as used in this Description of the
QUIPS, shall include any such additional Distributions and any Additional Sums
(as defined herein) paid on the Junior Subordinated Debentures.
 
     During any Extension Period, the Company may not take any of the prohibited
actions described under "-- Description of the Junior Subordinated
Debentures -- Certain Covenants of the Company".
 
     Although the Company may in the future exercise its option to defer
payments of interest on the Junior Subordinated Debentures, the Company has no
such current intention.
 
     The revenue of the Trust available for distribution to holders of the QUIPS
will be limited to payments under the Junior Subordinated Debentures. If the
Company does not make interest payments on the Junior Subordinated Debentures,
the Property Trustee will not have funds available to pay Distributions on the
QUIPS. The payment of Distributions (if and to the extent the Trust has funds on
hand legally available for the payment of such Distributions) will be guaranteed
by the Company on a limited basis as set forth herein under "-- Description of
the Guarantee".
 
  Mandatory Redemption
 
     Upon the repayment of the Junior Subordinated Debentures, the proceeds from
such repayment shall be applied by the Property Trustee to redeem a Like Amount
(as defined herein) of the Trust Securities, at a redemption price (the "Final
Redemption Price") which shall be equal to the principal of, and accrued and
unpaid interest on, the Junior Subordinated Debentures.
 
     "Like Amount" means (i) with respect to the redemption of the Trust
Securities, Trust Securities having an aggregate Liquidation Amount equal to the
principal amount of Junior Subordinated Debentures to be paid in accordance with
their terms and (ii) with respect to a distribution of Junior Subordinated
Debentures upon the liquidation of the Trust, Junior Subordinated Debentures
having a principal amount equal to the aggregate Liquidation Amount of the Trust
Securities of the holder to whom such Junior Subordinated Debentures are
distributed.
 
  Right to Exercise Junior Subordinated Debenture Put Option
 
     Each holder of QUIPS will have the right to require the Trust to distribute
Junior Subordinated Debentures having an aggregate principal amount equal to the
aggregate Liquidation Amount of such QUIPS to the Put Agent, on the Stock
Purchase Date, in exchange for such QUIPS, in connection with the concurrent
exercise by the Put Agent on behalf of each such holder of the Junior
Subordinated Debenture Put Option related thereto, but only if the cash received
on the exercise of such option is used to settle the Purchase Contracts secured
thereby.
 
     A holder of QUIPS may exercise the right referred to above by presenting
and surrendering the certificate evidencing such QUIPS, at the offices of the
Property Trustee, with the form of "Notice to Require Exercise of Junior
Subordinated Debenture Put Option" on the reverse side of the certificate
completed and executed as indicated, by 10:00 a.m., New York City time, on the
Stock Purchase Date. If such right is properly exercised, the applicable Junior
Subordinated Debentures will be distributed to an agent for the holder appointed
by the Company for such purpose (the "Put Agent", who shall be the Collateral
Agent), and the Put Agent will then exercise the Junior Subordinated Debenture
Put Option related thereto on behalf of the holder.
 
                                      S-42
<PAGE>   43
 
  Liquidation of the Trust and Distribution of Junior Subordinated Debentures
 
     The Company will have the right at any time to dissolve the Trust and,
after satisfaction of liabilities to creditors of the Trust as required by
applicable law, cause the Junior Subordinated Debentures to be distributed to
the holders of the Trust Securities in liquidation of the Trust.
 
     The Trust shall automatically dissolve upon the first to occur of: (a)
certain events of bankruptcy, dissolution or liquidation of the Company or the
Trust; (b) the distribution of a Like Amount of the Junior Subordinated
Debentures to the holders of the Trust Securities, if the Company, as Sponsor,
has given written direction to the Property Trustee to dissolve the Trust (which
direction is optional and wholly within the discretion of the Company, as
Sponsor); (c) redemption of all of the Trust Securities as described under
"-- Mandatory Redemption"; (d) expiration of the term of the Trust; (e)
repayment of the Junior Subordinated Debentures or at such time as no Junior
Subordinated Debentures are outstanding; and (f) the entry of an order for the
dissolution of the Trust by a court of competent jurisdiction.
 
     If a dissolution occurs as described in clauses (a), (b), (d) or (e) of the
preceding paragraph, the Trust shall be liquidated by the Administrators as
expeditiously as practicable by distributing, after satisfaction of liabilities
to creditors of the Trust as provided by applicable law, to the holders of the
Trust Securities a Like Amount of the Junior Subordinated Debentures (such
amount being the "Liquidation Distribution"). If the Liquidation Distribution
can be paid only in part because the Trust has insufficient assets on hand
legally available to pay in full the aggregate Liquidation Distribution, then
the amounts payable directly by the Trust on the QUIPS and the Common Trust
Securities shall be paid on a pro rata basis, except that if a Debenture Event
of Default has occurred and is continuing, the QUIPS shall have a priority over
the Common Trust Securities. See "-- Subordination of Common Trust Securities"
below.
 
     After the liquidation date is fixed for any distribution of Junior
Subordinated Debentures to holders of the Trust Securities, (a) the Trust
Securities will no longer be deemed to be outstanding, (b) the Depositary or its
nominee will receive a registered global certificate or certificates
representing the Junior Subordinated Debentures to be delivered upon such
distribution and (c) any certificates representing Trust Securities not held by
the Depositary or its nominee will be deemed to represent Junior Subordinated
Debentures having a principal amount equal to the aggregate Liquidation Amount
of such Trust Securities, and bearing accrued and unpaid interest in an amount
equal to the accumulated and unpaid Distributions on such Trust Securities until
such certificates are presented to the Administrators or their agent for
cancellation, whereupon the Company will issue to such holder, and the Debenture
Trustee will authenticate, a certificate representing such Junior Subordinated
Debentures.
 
  Redemption Procedures
 
     The QUIPS shall be redeemed at the Final Redemption Price with the proceeds
from the contemporaneous repayment of the Junior Subordinated Debentures. The
redemption of QUIPS shall be made and the Final Redemption Price shall be
payable on the QUIPS and Debenture Maturity Date only to the extent that the
Trust has funds legally available for the payment of such Redemption Price.
 
     If the Trust gives a notice of redemption in respect of the QUIPS, then, by
noon, New York City time, on the QUIPS and Debenture Maturity Date, to the
extent funds are legally available, with respect to the QUIPS held by the
Depositary or its nominees, the Property Trustee will give irrevocable
instructions and authority to the Depositary and will irrevocably deposit with
the Depositary for the QUIPS funds sufficient to pay the Final Redemption Price
to the holders thereof. With respect to the QUIPS held in certificated form, the
Property Trustee, to the extent funds are legally available, will give
irrevocable instructions and authority to the Paying Agent and will irrevocably
deposit with the Paying Agent funds sufficient to pay the Final Redemption Price
to the holders of the QUIPS. If a notice of redemption shall have been given and
funds deposited as
                                      S-43
<PAGE>   44
 
required to pay the Final Redemption Price, then all rights of the holders of
the QUIPS will cease, except the right of the holders of QUIPS to receive the
Final Redemption Price, but without interest on the Final Redemption Price, and
the QUIPS will cease to be outstanding. In the event that the QUIPS and
Debenture Maturity Date is not a Business Day, then the Final Redemption Price
payable on such date will be paid on the next succeeding day that is a Business
Day (and so long as such payment is made on the next succeeding Business Day
without any interest or other payment in respect of any such delay). In the
event that payment of the Final Redemption Price is improperly withheld or
refused and not paid either by the Trust or by the Company pursuant to the
Guarantee as described under "-- Description of the Guarantee" Distributions on
the QUIPS will accumulate on the Final Redemption Price at the QUIPS and
Debenture Rate from the QUIPS and Debenture Maturity Date to the date the Final
Redemption Price is actually paid.
 
  Subordination of Common Trust Securities
 
     Payment of Distributions on, and the Final Redemption Price of, the QUIPS
and the Common Trust Securities, as applicable, shall be made pro rata based on
the Liquidation Amount of the QUIPS and Common Trust Securities; provided,
however, that if on any Distribution Date or QUIPS and Debenture Maturity Date a
Debenture Event of Default (solely as the result of an event described in
clauses (1), (2) or (3) thereto) shall have occurred and be continuing, no
payment of any Distribution on, or Final Redemption Price of, any of the Common
Trust Securities, and no other payment on account of the redemption, liquidation
or other acquisition of the Common Trust Securities, shall be made unless
payment in full in cash of all accumulated and unpaid Distributions on all of
the outstanding QUIPS for all Distribution periods terminating on or prior
thereto or, in the case of the QUIPS and Debenture Maturity Date, the full
amount of the Final Redemption Price therefor, shall have been made or provided
for, and all funds available to the Property Trustee shall first be applied to
the payment in full in cash of all Distributions on, or Final Redemption Price
of, the QUIPS then due and payable.
 
     In the case of any Event of Default, the Company as holder of the Common
Trust Securities will be deemed to have waived any right to act with respect to
such Event of Default until the effect of such Event of Default shall have been
cured, waived or otherwise eliminated. Until any such Event of Default has been
so cured, waived or otherwise eliminated, the Property Trustee shall act solely
on behalf of the holders of the QUIPS, and only the holders of the QUIPS will
have the right to direct the Property Trustee to act on their behalf.
 
  Events of Default; Notice
 
     The occurrence of a Debenture Event of Default (see "-- Description of the
Junior Subordinated Debentures -- Debenture Events of Default") constitutes an
"Event of Default" under the Declaration; provided that pursuant to the
Declaration, the holder of the Common Trust Securities will be deemed to have
waived any Event of Default with respect to such Common Trust Securities until
all Events of Default with respect to the QUIPS have been cured, waived or
otherwise eliminated. Until such Events of Default have been so cured, waived or
otherwise eliminated, the Property Trustee will be deemed to be acting solely on
behalf of the holders of the QUIPS and only the holders of such QUIPS will have
the right to direct the Property Trustee with respect to certain matters under
the Declaration, and therefore the Indenture. The holders of a majority in
Liquidation Amount of the QUIPS will have the right to direct the time, method
and place of conducting any proceeding for any remedy available to the Property
Trustee or to direct the exercise of any trust or power conferred upon the
Property Trustee under the Declaration, including the right to direct the
Property Trustee to exercise the remedies available to it as holder of the
Junior Subordinated Debentures. If the Property Trustee fails to enforce its
rights under the Junior Subordinated Debentures after the holders of a majority
in Liquidation Amount of QUIPS have so directed the Property Trustee, a holder
of record of such QUIPS (or, for so long as QUIPS underlie Normal Units, a
holder of record of Normal Units) may, to the fullest extent permitted by law,
institute a legal
 
                                      S-44
<PAGE>   45
 
proceeding against the Company to enforce the Property Trustee's rights under
the Junior Subordinated Debentures without first instituting any legal
proceeding against the Property Trustee or any other person or entity.
Notwithstanding the foregoing, if an Event of Default has occurred and is
continuing, and such event is attributable to the failure of the Company to pay
interest or principal on the Junior Subordinated Debentures on the respective
dates such interest or principal is payable (after giving effect to any
Extension Period), then a holder of record of QUIPS (or, for so long as QUIPS
underlie Normal Units, a holder of record of Normal Units) may institute a
Direct Action against the Company for payment to such holder of the portion of
such principal or interest attributable to Junior Subordinated Debentures having
a principal amount equal to the aggregate Liquidation Amount of the QUIPS held
by such holder (or underlying such holder's Normal Units). In connection with
such Direct Action, the Company will be subrogated to the rights of such holder
of QUIPS (or Normal Units) under the Declaration to the extent of any payment
made by the Company to such holder of QUIPS (or Normal Units) in such Direct
Action; provided, however, that no such subrogation right may be exercised so
long as an Event of Default has occurred and is continuing. The holders of QUIPS
will not be able to exercise directly any other remedy available to the holders
of the Junior Subordinated Debentures.
 
     Upon occurrence of an Event of Default, the Property Trustee, so long as it
is the sole holder of Junior Subordinated Debentures, will have the right under
the Indenture to declare the principal of (or premium, if any) and interest on
the Junior Subordinated Debentures to be immediately due and payable.
 
     Within ten Business Days after the occurrence of any Event of Default
actually known to the Property Trustee, the Property Trustee shall transmit
notice of such Event of Default to the holders of the QUIPS, the Administrators
and the Company, as Sponsor, unless such Event of Default shall have been cured
or waived. The Company, as Sponsor, and the Administrators are required to file
annually with the Property Trustee a certificate as to whether or not they are
in compliance with all the conditions and covenants applicable to them under the
Declaration.
 
     If a Debenture Event of Default has occurred and is continuing, the QUIPS
shall have a preference over the Common Trust Securities as described under
"-- Liquidation of the Trust and Distribution of Junior Subordinated Debentures"
and "-- Subordination of Common Trust Securities".
 
  Removal of Issuer Trustees and Administrators
 
     Unless a Debenture Event of Default shall have occurred and be continuing,
any Issuer Trustee may be removed at any time by the holder of the Common Trust
Securities. If a Debenture Event of Default has occurred and is continuing, the
Property Trustee and the Delaware Trustee may be removed at such time by the
holders of a majority in Liquidation Amount of the outstanding QUIPS. In no
event will the holders of the QUIPS have the right to vote to appoint, remove or
replace the Administrators, which voting rights are vested exclusively in the
Company as the holder of the Common Trust Securities. No resignation or removal
of an Issuer Trustee and no appointment of a successor trustee shall be
effective until the acceptance of appointment by the successor Trustee in
accordance with the provisions of the Declaration.
 
  Merger or Consolidation of Issuer Trustees
 
     Any Person into which the Property Trustee or the Delaware Trustee that is
not a natural person may be merged or converted or with which it may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which such Issuer Trustee shall be a party, or any Person
succeeding to all or substantially all the corporate trust business of such
Issuer Trustee, shall be the successor of such Issuer Trustee under the
Declaration, provided such Person shall be otherwise qualified and eligible.
 
                                      S-45
<PAGE>   46
 
  Mergers, Conversions, Consolidations, Amalgamations or Replacements of the
Trust
 
     The Trust may not merge or convert with or into, consolidate, amalgamate,
or be replaced by, or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to any Person, except as described
below or as otherwise described under "-- Liquidation of the Trust and
Distribution of Junior Subordinated Debentures". The Trust may, at the request
of the Company, as Sponsor and holder of the Common Trust Securities, but
without the consent of the holders of the QUIPS, merge or convert with or into,
consolidate, amalgamate, or be replaced by or convey, transfer or lease its
properties and assets as an entirety or substantially as an entirety to a trust
organized as such under the laws of any State; provided, that (a) such successor
entity either (i) expressly assumes all of the obligations of the Trust with
respect to the QUIPS or (ii) substitutes for the QUIPS other securities having
substantially the same terms as the QUIPS (the "Successor Securities") so long
as the Successor Securities rank the same as the QUIPS rank in priority with
respect to distributions and payments upon liquidation, redemption and
otherwise, (b) the Company expressly appoints a trustee of such successor entity
possessing the same powers and duties as the Property Trustee with respect to
the Junior Subordinated Debentures, (c) the Successor Securities are listed, or
any Successor Securities will be listed upon notification of issuance, on any
national securities exchange or other organization on which the QUIPS are then
listed or quoted, if any, (d) such merger, conversion, consolidation,
amalgamation, replacement, conveyance, transfer or lease does not cause the
QUIPS (including any Successor Securities) or Units to be downgraded by any
nationally recognized statistical rating organization, if then so rated,(e) such
merger, conversion, consolidation, amalgamation, replacement, conveyance,
transfer or lease does not adversely affect the rights, preferences and
privileges of the holders of the QUIPS (including any Successor Securities) in
any material respect, (f) such successor entity has a purpose substantially
identical to that of the Trust, (g) prior to such merger, conversion,
consolidation, amalgamation, replacement, conveyance, transfer or lease, the
Company has received an opinion from independent counsel to the Trust
experienced in such matters to the effect that (i) such merger, conversion,
consolidation, amalgamation, replacement, conveyance, transfer or lease does not
adversely affect the rights, preferences and privileges of the holders of the
QUIPS (including any Successor Securities) in any material respect, (ii)
following such merger, conversion, consolidation, amalgamation, replacement,
conveyance, transfer or lease, neither the Trust nor such successor entity will
be required to register as an investment company under the Investment Company
Act of 1940, as amended (the "Investment Company Act") and (iii) following such
merger, conversion, consolidation, amalgamation, replacement, conveyance,
transfer or lease, the Trust or the successor entity will continue to be
classified as a grantor trust for United States Federal income tax purposes and
(h) the Company or any permitted successor or assignee owns all of the common
trust securities of such successor entity and guarantees the obligations of such
successor entity under the Successor Securities at least to the extent provided
by the Guarantee. Notwithstanding the foregoing, the Trust shall not, except
with the consent of holders of 100% in Liquidation Amount of the Trust
Securities, consolidate, amalgamate, merge or convert with or into, or be
replaced by or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to any other entity or permit any other
entity to consolidate, amalgamate, merge or convert with or into, or replace it
if such consolidation, amalgamation, merger, conversion, replacement,
conveyance, transfer or lease would cause the Trust or the successor entity to
be classified as an association taxable as a corporation or as other than a
grantor trust for United States Federal income tax purposes.
 
  Voting Rights; Amendment of the Declaration
 
     Except as provided below and under "-- Mergers, Conversions,
Consolidations, Amalgamations or Replacements of the Trust" above and
"-- Description of the Guarantee -- Amendments and Assignment" and as otherwise
required by law and the Declaration, the holders of the QUIPS will have no
voting rights.
 
                                      S-46
<PAGE>   47
 
     The Declaration may be amended from time to time by the Company and the
Property Trustee, without the consent of the holders of the QUIPS, (a) to cure
any ambiguity, correct or supplement any provisions in the Declaration that may
be inconsistent with any other provision, or make any other provisions with
respect to matters or questions arising under the Declaration, which shall not
be inconsistent with the other provisions of the Declaration, or (b) to modify,
eliminate or add to any provisions of the Declaration to such extent as shall be
necessary to ensure that the Trust will be classified for United States federal
income tax purposes as a grantor trust or as other than an association taxable
as a corporation at all times that any Trust Securities are outstanding or to
ensure that the Trust will not be required to register as an "investment
company" under the Investment Company Act; provided, however, that in each case,
such action shall not adversely affect in any material respect the interests of
the holders of the Trust Securities. Any amendments of the Declaration pursuant
to the foregoing shall become effective when notice thereof is given to the
holders of the Trust Securities. The Declaration may be amended by the Issuer
Trustees and the Company (x) with the consent of holders of QUIPS (or Normal
Units) representing a majority (based upon Liquidation Amount) of the
outstanding QUIPS, (y) upon receipt by the Property Trustee of an opinion of
counsel to the effect that such amendment or the exercise of any power granted
to the Issuer Trustees in accordance with such amendment will not cause the
Trust to be classified as an association taxable as a corporation or affect the
Trust's status as a grantor trust for United States federal income tax purposes
or the Trust's exemption from status as an "investment company" under the
Investment Company Act, and (z) upon receipt by the Property Trustee and/or
Delaware Trustee of Officer's Certificates of Opinions and Consents that such
amendment is permitted by and conforms to the Declaration, provided that,
without the consent of each holder of Trust Securities, the Declaration may not
be amended to (i) change the amount or timing of any Distribution or other
payment on the Trust Securities (including payment of the Put Price) or
otherwise adversely affect the amount of any Distribution or other payment
(including payment of the Put Price) required to be made in respect of the Trust
Securities as of a specified date or (ii) restrict the right of a holder of
Trust Securities to institute suit for the enforcement of any such payment on or
after such date.
 
     So long as any Junior Subordinated Debentures are held by the Property
Trustee, the Issuer Trustees shall not (a) direct the time, method and place of
conducting any proceeding for any remedy available to the Debenture Trustee, or
executing any trust or power conferred on the Property Trustee with respect to
the Junior Subordinated Debentures, (b) waive certain past defaults under the
Indenture, (c) exercise any right to rescind or annul a declaration of
acceleration of the maturity of the principal of the Junior Subordinated
Debentures or (d) consent to any amendment, modification or termination of the
Indenture or the Junior Subordinated Debentures, where such consent shall be
required, without, in each case, obtaining the prior approval of the holders of
QUIPS (or Normal Units) representing a majority in Liquidation Amount of all
outstanding QUIPS; provided, however, that where a consent under the Indenture
would require the consent of each holder of Junior Subordinated Debentures
affected thereby, no such consent shall be given by the Property Trustee without
the prior approval of each holder of the QUIPS (or Normal Units). The Issuer
Trustees shall not revoke any action previously authorized or approved by a vote
of the holders of the QUIPS (or Normal Units) except by subsequent vote of such
holders. The Property Trustee shall notify each holder of Trust Securities (or
Normal Units) of any notice of default with respect to the Junior Subordinated
Debentures. In addition to obtaining the foregoing approvals of such holders,
prior to taking any of the foregoing actions, the Issuer Trustees shall obtain
an opinion of counsel experienced in such matters to the effect that the Trust
will not be classified as an association taxable as a corporation or as other
than a grantor trust for United States Federal income tax purposes on account of
such action.
 
     Any required approval of holders of QUIPS (or Normal Units) may be given at
a meeting of such holders convened for such purpose or pursuant to written
consent. The Property Trustee will cause a notice of any meeting at which
holders of QUIPS (or Normal Units) are entitled to vote, or
 
                                      S-47
<PAGE>   48
 
of any matter upon which action by written consent of such holders is to be
taken, to be given to each holder of record of QUIPS (or Normal Units) in the
manner set forth in the Declaration.
 
     No vote or consent of the holders of QUIPS (or Normal Units) will be
required for the Trust to redeem and cancel the QUIPS in accordance with the
Declaration.
 
     Notwithstanding that holders of the QUIPS (or Normal Units) are entitled to
vote or consent under any of the circumstances described above, any of the QUIPS
(or Normal Units) that are owned by the Company or any affiliate of the Company
shall, for purposes of such vote or consent, be treated as if they were not
outstanding.
 
  Form and Book-Entry Procedures
 
     As long as the QUIPS constitute Pledged Securities, the QUIPS will be
represented by a single certificate and held for the benefit of the holders of
the Normal Units. If the QUIPS cease to constitute Pledged Securities, the QUIPS
may be represented by one or more QUIPS in registered, global form registered in
the name of the Depositary or its nominee. The depositary arrangements for the
QUIPS are expected to be substantially similar to those in effect for the Units.
For a description of the Depositary and the terms of the depositary
arrangements, see "-- Book-Entry System".
 
  Payment and Paying Agency
 
     If the QUIPS cease to constitute Pledged Securities, payments in respect of
the QUIPS held in global form shall be made to the Depositary, which shall
credit the relevant accounts at the Depositary on the applicable Distribution
Dates or in respect of the QUIPS that are not held by the Depositary, such
payments shall be made by check mailed to the address of the holder entitled
thereto as such address shall appear on the register. The paying agent (the
"Paying Agent") shall initially be the Property Trustee and any additional
paying agent chosen by the Property Trustee and acceptable to the Company. The
Paying Agent shall be permitted to resign as Paying Agent upon 30 days' written
notice to the Property Trustee (if not the Paying Agent) and the Administrators.
In the event that the Property Trustee shall no longer be the Paying Agent, the
Administrators shall appoint a successor to act as Paying Agent.
 
  Registrar and Transfer Agent
 
     The Property Trustee will initially act as registrar and transfer agent for
the QUIPS.
 
     Registration of transfers of the QUIPS will be effected without charge by
or on behalf of the Trust but upon payment of any tax or other governmental
charges that may be imposed in connection with any transfer or exchange. The
Trust will not be required to register or cause to be registered the transfer of
any QUIPS after they have been called for redemption.
 
  Information Concerning the Property Trustee
 
     The Property Trustee, other than during the occurrence and continuance of
an Event of Default, undertakes to perform only such duties as are specifically
set forth in the Declaration and, after such Event of Default, must exercise the
same degree of care and skill as a prudent person would exercise or use in the
conduct of his or her affairs. Subject to this provision, the Property Trustee
is under no obligation to exercise any of the powers vested in it by the
Declaration at the request of any holder of Trust Securities unless it is
offered reasonable indemnity against the costs, expenses and liabilities that
might be incurred thereby. The Property Trustee is not required to expend or
risk its own funds or otherwise incur personal financial liability in the
performance of its duties if repayment or adequate indemnity is not reasonably
assured to the Property Trustee.
 
                                      S-48
<PAGE>   49
 
  Miscellaneous
 
     The Administrators are authorized and directed to conduct the affairs of
and to operate the Trust in such a way that the Trust will not be deemed to be
an "investment company" required to be registered under the Investment Company
Act or classified as an association taxable as a corporation or as other than a
grantor trust for United States Federal income tax purposes and so that the
Junior Subordinated Debentures will be treated as indebtedness of the Company
for United States federal income tax purposes. In this connection, the Company
and the Administrators are authorized to take any action, not inconsistent with
applicable law, the certificate of trust of the Trust or the Declaration, that
the Company and the Administrators determine in their discretion to be necessary
or desirable for such purposes, as long as such action does not materially
adversely affect the interests of the holders of the Trust Securities.
 
     Holders of the Trust Securities have no preemptive or similar rights.
 
     The Trust may not borrow money, issue debt, execute mortgages or pledge any
of its assets.
 
DESCRIPTION OF THE JUNIOR SUBORDINATED DEBENTURES
 
  General
 
     The Junior Subordinated Debentures are to be issued under the Indenture.
First Union National Bank will initially act as Debenture Trustee under the
Indenture. The Indenture will be qualified under the Trust Indenture Act.
 
     The Junior Subordinated Debentures will be unsecured and subordinate and
rank junior in right of payment to the extent and in the manner set forth in the
Indenture to all Senior Indebtedness of the Company. See "Risk
Factors -- Holding Company Structure; Reliance on Dividends from Insurance
Subsidiaries" above and "-- Subordination" below.
 
     The Junior Subordinated Debentures will mature on the QUIPS and Debenture
Maturity Date of                , 2003. The Junior Subordinated Debentures will
not be redeemable at the option of the Company prior to the QUIPS and Debenture
Maturity Date.
 
  Interest
 
     Interest on the Junior Subordinated Debentures will accrue from the first
date of issuance of the Junior Subordinated Debentures at a rate per annum equal
to the QUIPS and Debenture Rate referred to under " --Description of the
QUIPS -- Distributions" above and will be payable quarterly in arrears on each
Quarterly Payment Date (each, an "Interest Payment Date"), subject to the
deferral provisions described below, to the holders of the Junior Subordinated
Debentures on the relevant record dates, which, unless the Junior Subordinated
Debentures are distributed upon liquidation of the Trust and are issued in
certificated form, will be one Business Day prior to the relevant Interest
Payment Date. Until the liquidation, if any, of the Trust, each Junior
Subordinated Debenture will be held in the name of the Property Trustee in trust
for the benefit of the holders of the Trust Securities. The amount of interest
payable for any period will be computed on the basis of a 360-day year of twelve
30-day months. In the event that any date on which interest is payable on the
Junior Subordinated Debentures is not a Business Day, then payment of the
interest payable on such date will be on the next succeeding day that is a
Business Day (and to the extent such payment is made on the next succeeding
Business Day without any interest or other payment in respect of any such
delay), except that if such Business Day is in the next succeeding calendar
year, such payment shall be made on the immediately preceding Business Day, in
each case with the same force and effect as if made on the date such payment was
originally payable. The term "interest", as used in this Description of the
Junior Subordinated Debentures, shall include any Additional Sums payable on the
Junior Subordinated Debentures.
 
                                      S-49
<PAGE>   50
 
  Market Rate Increase
 
     By 9:30 a.m., New York City time, on the Call Option Expiration Date, the
Rate Increase Agent will determine whether the then current aggregate market
value of the QUIPS (or, if the QUIPS are no longer outstanding, Junior
Subordinated Debentures) underlying the Normal Units is at least equal to
100.25% of the Cash Equivalent of the Aggregate Call Option Exercise
Consideration. If the Rate Increase Agent determines that it is (or the QUIPS
and Debenture Rate is already equal to or greater than the Maximum QUIPS and
Debenture Rate), interest on the Junior Subordinated Debentures (and, if the
QUIPS remain outstanding, distributions on the QUIPS) will continue to accrue at
the initial QUIPS and Debenture Rate. If the Rate Increase Agent determines that
it is not (and the QUIPS and Debenture Rate is less than the Maximum QUIPS and
Debenture Rate), the Rate Increase Agent will, by 9:30 a.m., New York City time,
on the Call Option Expiration Date, select an increased rate equal to the lower
of (a) the rate that it determines is sufficient to cause the then current
aggregate market value of such QUIPS (or, if the QUIPS are no longer
outstanding, such Junior Subordinated Debentures) to be at least equal to
100.25% of the Cash Equivalent of the Aggregate Call Option Exercise
Consideration and (b) the Maximum QUIPS and Debenture Rate (and notify the
Company and the Call Option Holder of such increased rate), and the QUIPS and
Debenture Rate will thereupon become that increased rate.
 
     "Cash Equivalent of the Aggregate Call Option Exercise Consideration" means
the cash value on the Call Option Expiration Date of the Aggregate Call Option
Exercise Consideration, assuming for this purpose, even if not true, that the
Call Options are exercised on the Call Option Expiration Date, and further
assuming that (a) the Treasury Securities included in the Aggregate Call Option
Exercise Consideration are highly liquid Treasury Securities maturing on or
within 35 days prior to the Stock Purchase Date (as designated in good faith by
the Call Option Holder in a notice delivered to the Rate Increase Agent by 8:30
a.m., New York City time, on the Call Option Expiration Date or, if the Call
Option Holder fails to so designate such Treasury Securities, as designated in
good faith by the Rate Increase Agent, in either case in a manner intended to
minimize the Cash Equivalent of the Aggregate Call Option Exercise
Consideration) and (b) such Treasury Securities are valued based on the ask-side
price thereof at 9:00 a.m., New York City time, on the Call Option Expiration
Date (as determined on a same day settlement basis by a reasonable and customary
means selected in good faith by the Rate Increase Agent and notified to the Call
Option Holder prior thereto) plus interest accrued thereon to such date.
 
     "Maximum QUIPS and Debenture Rate" means (a) the yield to maturity
(calculated in accordance with standard market practice) corresponding to the
bid-side price at 9:00 a.m., New York City time, on the Call Option Expiration
Date (as determined by a reasonable and customary means selected in good faith
by the Rate Increase Agent and notified to the Call Option Holder prior thereto)
of highly liquid Treasury Securities maturing on or around the QUIPS and
Debenture Maturity Date as selected in good faith by the Rate Increase Agent
plus (b) 350 basis points (3.5%).
 
     See "-- Description of the Junior Subordinated Debentures."
 
  Option to Extend Interest Payment Date
 
     So long as no Debenture Event of Default has occurred and is continuing,
the Company will have the right under the Indenture at any time during the term
of the Junior Subordinated Debentures to defer the payment of interest at any
time or from time to time for a period not extending beyond the QUIPS and
Debenture Maturity Date. At the end of an Extension Period, the Company must pay
all interest then accrued and unpaid (together with interest thereon accrued at
the Deferral Rate compounded on each succeeding Interest Payment Date). During
an Extension Period, interest will continue to accrue and, if the Junior
Subordinated Debentures have been distributed to holders of the Trust
Securities, holders of Junior Subordinated Debentures (or holders of the Trust
Securities while Trust Securities are outstanding) will be required to accrue
 
                                      S-50
<PAGE>   51
 
interest income for United States Federal income tax purposes prior to the
receipt of cash attributable to such income. See "Certain Federal Income Tax
Consequences -- Interest Received on the QUIPS".
 
     During any such Extension Period, the Company may not take any of the
prohibited actions described in the first paragraph under "-- Certain Covenants
of the Company".
 
     Prior to the expiration of any such Extension Period, the Company may
further extend such Extension Period, provided that such extension does not
cause such Extension Period to extend beyond the QUIPS and Debenture Maturity
Date. Upon the termination of any such Extension Period and the payment of all
amounts then due on any Interest Payment Date, the Company may elect to begin a
new Extension Period, subject to the above requirements. No interest shall be
due and payable during an Extension Period, except at the end thereof. The
Company must give the Property Trustee, the Administrators and the Debenture
Trustee written notice of its election of any Extension Period (or an extension
thereof) at least five Business Days prior to the earlier of (a) the date the
Distributions on the Trust Securities would have been payable except for the
election to begin or extend such Extension Period, (b) the date the Trustees are
required to give notice to any securities exchange or to holders of QUIPS of the
record date or the date such Distributions are payable and (c) such record date.
The Debenture Trustee shall give notice of the Company's election to begin or
extend a new Extension Period to the holders of the QUIPS. There is no
limitation on the number of times that the Company may elect to begin an
Extension Period.
 
  Additional Sums
 
     If the Trust is required to pay any additional taxes, duties or other
governmental charges, the Company will pay as additional amounts on the Junior
Subordinated Debentures the Additional Sums.
 
     "Additional Sums" means such additional amounts as may be necessary in
order that the amount of Distributions then due and payable by the Trust on the
outstanding QUIPS and Common Trust Securities shall not be reduced as a result
of any additional taxes, duties or other governmental charges to which the Trust
has become subject.
 
     In lieu of paying Additional Sums on the Junior Subordinated Debentures the
Company may dissolve the Trust and cause the Junior Subordinated Debentures to
be distributed to the holders of the Trust Securities in liquidation of the
Trust. See "-- Description of the QUIPS -- Liquidation of the Trust and
Distribution of Junior Subordinated Debentures".
 
  Junior Subordinated Debenture Put Options
 
     Each holder of Junior Subordinated Debentures will have the right (a
"Junior Subordinated Debenture Put Option") to require the Company to repurchase
such Junior Subordinated Debentures, on the Stock Purchase Date, for a purchase
price (the "Put Price") for such Junior Subordinated Debentures equal to the
aggregate principal amount thereof plus unpaid interest accrued thereon to but
not including the Stock Purchase Date, but only if the cash received on the
exercise of such option is used to settle the Purchase Contracts secured
thereby. The Trust will covenant in the Declaration that it will not exercise
any Junior Subordinated Debenture Put Option (although it may distribute Junior
Subordinated Debentures to a Put Agent in connection with the exercise by a
holder of QUIPS or the Put Agent on behalf of such holder of such holder's right
to require the Trust to do so, as contemplated under "-- Description of the
QUIPS -- Right to Exercise Junior Subordinated Debenture Put Options" above).
 
     Each holder of Junior Subordinated Debentures or the Put Agent on behalf of
such holder may exercise the Junior Subordinated Debenture Put Option related to
such securities by presenting and surrendering the certificate evidencing such
securities, at the offices of the Debenture Trustee, with
 
                                      S-51
<PAGE>   52
 
the form of "Notice of Exercise of Put Right" on the reverse side of the
certificate completed and executed as indicated, by 10:00 a.m., New York City
time, on the Stock Purchase Date.
 
  Certain Covenants of the Company
 
     The Company will covenant that it will not (a) declare or pay any dividends
or distributions on, or redeem, purchase, acquire, or make a liquidation payment
with respect to, any of the Company's capital stock, (b) make any payment of
principal, interest or premium, if any, on or repay, repurchase or redeem any
debt securities of the Company that rank pari passu with or junior in right of
payment to the Junior Subordinated Debentures or (c) make any guarantee payments
with respect to any guarantee by the Company of any securities of any subsidiary
of the Company if such guarantee ranks pari passu or junior in right of payment
to the Junior Subordinated Debentures (other than, in the case of clauses (a),
(b) and (c), (i) dividends or distributions in shares of, or options, warrants
or rights to subscribe for or purchase shares of, common stock of the Company,
(ii) any declaration of a dividend in connection with the implementation of a
stockholder's rights plan, or the issuance of stock under any such plan in the
future, or the redemption or repurchase of any such rights pursuant thereto,
(iii) payments under the Guarantee, (iv) as a result of a reclassification of
the Company's capital stock solely into shares of one or more classes or series
of the Company's capital stock or the exchange or conversion of one class or
series of the Company's capital stock for another class or series of the
Company's capital stock, (v) the purchase of fractional interests in shares of
the Company's capital stock pursuant to the conversion or exchange provisions of
such capital stock or the security being converted or exchanged and (vi)
purchases of common stock in connection with the satisfaction by the Company of
its obligations under any of the Company's benefit plans for its and its
subsidiaries' directors, officers or employees or any of the Company's dividend
reinvestment plans) if at such time (x) a Debenture Event of Default shall have
occurred and be continuing, (y) the Company shall be in default with respect to
its payment of any obligations under the Guarantee or (z) the Company shall have
given notice of its election of an Extension Period, or any extension thereof,
as provided in the Indenture and shall not have rescinded such notice, and such
Extension Period, or any extension thereof, shall have commenced and not yet
terminated.
 
     The Company will also covenant (a) to maintain 100 percent ownership of the
Common Trust Securities; provided, however, that any permitted successor of the
Company under the Indenture may succeed to the Company's ownership of the Common
Trust Securities, (b) to use its reasonable efforts to cause the Trust (i) to
remain a statutory business trust, except in connection with the distribution of
Junior Subordinated Debentures to the holders of Trust Securities in liquidation
of the Trust, the redemption of all of the Trust Securities of the Trust, or
certain mergers, consolidations or amalgamations, each as permitted by the
Declaration of the Trust and (ii) to continue not to be classified as an
association taxable as a corporation or a partnership for United States federal
income tax purposes and (c) to use its reasonable efforts to cause each holder
of Trust Securities (or, for so long as Trust Securities constitute Pledged
Securities, Units) to be treated as owning an undivided beneficial interest in
the Junior Subordinated Debentures.
 
  Debenture Events of Default
 
     The Indenture provides that any one or more of the following described
events with respect to the Junior Subordinated Debentures constitutes a
"Debenture Event of Default" (whatever the reason for such Debenture Event of
Default and whether it shall be voluntary or involuntary or be effected by
operation of law or pursuant to any judgment, decree or order of any court or
any order, rule or regulation of any administrative or governmental body):
 
     (a) failure for 30 days to pay any interest on the Junior Subordinated
Debentures when due (subject to the deferral of any due date in the case of an
Extension Period); or
 
                                      S-52
<PAGE>   53
 
     (b) failure to pay any principal on the Junior Subordinated Debentures when
due whether at maturity, by declaration of acceleration of maturity or
otherwise; or
 
     (c) failure to pay the Put Price when due upon exercise of a Junior
Subordinated Debenture Put Option; or
 
     (d) failure to observe or perform in any material respect certain other
covenants contained in the Indenture for 60 days after written notice to the
Company from the Debenture Trustee or to the Company and the Debenture Trustee
from the holders of at least 25% in aggregate outstanding principal amount of
Junior Subordinated Debentures; or
 
     (e) certain events of bankruptcy, insolvency or reorganization of the
Company.
 
     Prior to any declaration accelerating the maturity of the Junior
Subordinated Debentures, the holders of a majority in aggregate outstanding
principal amount of the Junior Subordinated Debentures have the right to direct
the time, method and place of conducting any proceeding for any remedy available
to the Debenture Trustee. The Debenture Trustee or the holders of not less than
25% in aggregate outstanding principal amount of the Junior Subordinated
Debentures may declare the principal due and payable immediately upon a
Debenture Event of Default. The holders of a majority in aggregate outstanding
principal amount of the Junior Subordinated Debentures may annul such
declaration and waive the default if the default (other than the nonpayment of
the principal of the Junior Subordinated Debentures which has become due solely
by such acceleration) has been cured and a sum sufficient to pay all matured
installments of interest and principal due otherwise than by acceleration has
been deposited with the Debenture Trustee.
 
     Prior to any declaration accelerating maturity of the Junior Subordinated
Debentures, the holder or holders of a majority in aggregate outstanding
principal amount of the Junior Subordinated Debentures (which, prior to any
liquidation or dissolution of the Trust, will be the Property Trustee) affected
thereby may, on behalf of the holders of all the Junior Subordinated Debentures,
waive any past default except a default in the payment of principal, premium, if
any, interest or Put Price in respect of Junior Subordinated Debentures (unless
such default has been cured and a sum sufficient to pay all matured installments
of interest and premium, if any, and principal due otherwise than by
acceleration and any payments of the Put Price in respect of the Junior
Subordinated Debentures has been deposited with the Debenture Trustee), or a
default in respect of a covenant or provision which under the Indenture cannot
be modified or amended without the consent of the holder of each outstanding
Junior Subordinated Debenture.
 
     The Indenture requires the annual filing by the Company with the Debenture
Trustee of a certificate as to the absence of certain defaults under the
Indenture.
 
     The Indenture provides that the Debenture Trustee may withhold notice of a
Debenture Event of Default from the holders of the Junior Subordinated
Debentures (except a Debenture Event of Default in payment of principal,
premium, if any, interest or Put Price in respect of Junior Subordinated
Debentures) if the Debenture Trustee considers it in the interest of such
holders to do so.
 
  Enforcement of Certain Rights by Holders of QUIPS
 
     If a Debenture Event of Default shall have occurred and be continuing and
shall be attributable to the failure of the Company to pay interest or premium,
if any, on or principal of the Junior Subordinated Debentures on the due date
(after giving effect to any Extension Period), a holder of record of QUIPS (or,
for so long as QUIPS underlie Normal Units, a holder of record of Normal Units)
may institute a Direct Action. See "-- Description of the QUIPS -- Events of
Default; Notice". The Company may not amend the Indenture to remove the
foregoing right to bring a Direct Action without the prior written consent of
the holders of all of the QUIPS (or, for so long as QUIPS underlie Normal Units,
the holders of all the Normal Units).
 
                                      S-53
<PAGE>   54
 
     The holders of the QUIPS will not be able to exercise directly any
remedies, other than those set forth in the preceding paragraph, available to
the holders of the Junior Subordinated Debentures.
 
  Consolidation, Merger, Sale of Assets and Other Transactions
 
     The Indenture provides that the Company shall not consolidate with or merge
into any other Person or convey, transfer or lease its properties and assets as
an entirety or substantially as an entirety to any Person, and no Person shall
consolidate with or merge into the Company or convey, transfer or lease its
properties and assets as an entirety or substantially as an entirety to the
Company, unless: (i) in case the Company consolidates with or merges into
another Person or conveys or transfers its properties and assets substantially
as an entirety to any Person, the successor Person is organized under the laws
of the United States or any State or the District of Columbia, and such
successor Person expressly assumes the Company's obligations on the Junior
Subordinated Debentures; (ii) immediately after giving effect thereto, no
Debenture Event of Default, and no event which, after notice or lapse of time or
both, would become a Debenture Event of Default, shall have occurred and be
continuing; and (iii) certain other conditions as prescribed in the Indenture
are met.
 
     The general provisions of the Indenture do not afford holders of the Junior
Subordinated Debentures protection in the event of a highly leveraged or other
transaction involving the Company that may adversely affect holders of the
Junior Subordinated Debentures.
 
  Modification of the Indenture
 
     From time to time the Company and the Debenture Trustee may, without the
consent of the holders of Junior Subordinated Debentures, amend, waive or
supplement the Indenture for specified purposes, including, among other things,
curing ambiguities, defects or inconsistencies (provided that any such action
does not materially adversely affect the interest of the holders of Junior
Subordinated Debentures). The Indenture contains provisions permitting the
Company and the Debenture Trustee, with the consent of the holders of a majority
in principal amount of the Junior Subordinated Debentures, to modify the
Indenture in a manner affecting the rights of the holders of Junior Subordinated
Debentures; provided that no such modification may, without the consent of the
holders of each outstanding Junior Subordinated Debenture so affected, (a)
change the QUIPS and Debenture Maturity Date, or reduce the principal amount of
the Junior Subordinated Debentures or reduce the rate or extend the time of
payment of interest thereon (other than a permitted deferral of interest during
an Extension Period), (b) change any of the terms or conditions of the Junior
Subordinated Debenture Put Options or the Put Price, or (c) reduce the
percentage of principal amount of Junior Subordinated Debentures the holders of
which are required to consent to any such modification of the Indenture.
 
  Satisfaction and Discharge
 
     The Indenture provides that when, among other things, all Junior
Subordinated Debentures not previously delivered to the Debenture Trustee for
cancellation (a) have become due and payable or (b) will become due and payable
at maturity within one year and the Company deposits or causes to be deposited
with the Debenture Trustee funds, in trust, for the purpose and in an amount
sufficient to pay and discharge the entire indebtedness on the Junior
Subordinated Debentures not previously delivered to the Debenture Trustee for
cancellation, for the principal and interest to the QUIPS and Debenture Maturity
Date, then the Indenture will cease to be of further effect (except as to the
Company's obligations to pay all other sums due pursuant to the Indenture and to
provide the officers' certificates and opinions of counsel described therein),
and the Company will be deemed to have satisfied and discharged the Indenture.
 
                                      S-54
<PAGE>   55
 
  Subordination
 
     The obligations of the Company under the Junior Subordinated Debentures
will be unsecured and subordinate and rank junior in right of payment to all
present and future Senior Indebtedness to the extent provided in the Indenture.
Upon any payment or distribution of assets to creditors upon any liquidation,
dissolution, winding up, reorganization, assignment for the benefit of
creditors, marshaling of assets or any bankruptcy, insolvency, debt
restructuring or similar proceedings in connection with any insolvency or
bankruptcy proceeding of the Company, the holders of Senior Indebtedness will
first be entitled to receive payment in full of all Senior Indebtedness before
the holders of Junior Subordinated Debentures will be entitled to receive or
retain any payment in respect thereof.
 
     No payments on account of principal of, premium, if any, or interest on the
Junior Subordinated Debentures (including payments on exercise of Junior
Subordinated Debenture Put Options) may be made if there shall have occurred and
be continuing a default in any payment with respect to Senior Indebtedness, or
an event of default with respect to any Senior Indebtedness resulting in the
acceleration of the maturity thereof, or if any judicial proceeding shall be
pending with respect to any such default.
 
     In the event of the acceleration of the maturity of Junior Subordinated
Debentures, the holders of all Senior Indebtedness outstanding at the time of
such acceleration will first be entitled to receive payment in full of all
amounts due in respect of such Senior Indebtedness before the holders of Junior
Subordinated Debentures will be entitled to receive or retain any payment in
respect of the Junior Subordinated Debentures.
 
     Notwithstanding the foregoing, amounts that would be due and payable by the
Company to holders of Units in the absence of the foregoing subordination
provisions may be applied by such holders to offset their obligations under
their respective Purchase Contracts.
 
     "Senior Indebtedness" shall mean, with respect to the Company, (a) the
principal, premium, if any, and interest in respect of (i) indebtedness of the
Company for money borrowed and (ii) indebtedness evidenced by securities,
debentures, notes, bonds or other similar instruments issued by the Company,
including, without limitation, any current or future indebtedness under any
indenture (other than the Indenture) to which the Company is party, (b) all
capital lease obligations of the Company, (c) all obligations of the Company
issued or assumed as the deferred purchase price of property, all conditional
sale obligations of the Company and all obligations of the Company under any
title retention agreement (but excluding trade accounts payable arising in the
ordinary course of business), (d) all obligations of the Company for the
reimbursement on any letter of credit, any banker's acceptance, any security
purchase facility, any repurchase agreement or similar arrangement, any interest
rate swap, any other hedging arrangement, any obligation under options or any
similar credit or other transaction, (e) all obligations of the type referred to
in clauses (a) through (d) above of other persons for the payment of which the
Company is responsible or liable as obligor, guarantor or otherwise and (f) all
obligations of the type referred to in clauses (a) through (e) above of other
persons secured by any lien on any property or asset of the Company (whether or
not such obligation is assumed by the Company), except for (x) any indebtedness
between or among the Company or any Subsidiary of the Company, (y) any other
debt securities issued pursuant to the Indenture and guarantees in respect of
those debt securities and (z) any indebtedness that is by its terms subordinated
to or pari passu with the Junior Subordinated Debentures, including any junior
subordinated debt securities issued in the future with subordination terms
substantially similar to the Junior Subordinated Debentures. Senior Indebtedness
shall continue to be Senior Indebtedness and be entitled to the benefits of the
subordination provisions irrespective of any amendment, modification or waiver
of any term of such Senior Indebtedness.
 
     Because the Company is a holding company, the Junior Subordinated
Debentures are effectively subordinated to all existing and future liabilities
of the Company's subsidiaries, except to the
 
                                      S-55
<PAGE>   56
 
extent the Company is a creditor of the subsidiary recognized as such. See "Risk
Factors -- Holding Company Structure; Limitations on Dividends" in the
Prospectus.
 
     The Indenture places no limitation on the amount of Senior Indebtedness
that may be incurred by the Company. The Company expects from time to time to
incur indebtedness constituting Senior Indebtedness.
 
  Form and Book-Entry Procedures
 
     If the Junior Subordinated Debentures are distributed to the holders of the
Trust Securities and do not constitute Pledged Securities with respect to the
Units, the Junior Subordinated Debentures may be represented by one or more
global certificates registered in the name of the Depositary or its nominee. The
depositary arrangements for such Junior Subordinated Debentures are expected to
be substantially similar to those in effect for the Units. For a description of
the Depositary and the terms of the depositary arrangements, see "-- Book-Entry
System".
 
  Payment and Paying Agents
 
     Payment of principal of and premium, if any, and any interest on Junior
Subordinated Debentures will be made at the office of the Debenture Trustee in
The City of New York or at the office of such paying agent or paying agents as
the Company may designate from time to time, except that at the option of the
Company payment of any interest may be made (i) by check mailed to the address
of the Person entitled thereto as such address shall appear in the register for
Junior Subordinated Debentures or (ii) by transfer to an account maintained by
the Person entitled thereto as specified in such register, provided that proper
transfer instructions have been received by the relevant Record Date. Payment of
any interest on any Junior Subordinated Debenture will be made to the Person in
whose name such Junior Subordinated Debenture is registered at the close of
business on the Record Date for such interest, except in the case of defaulted
interest. The Company may at any time designate additional paying agents or
rescind the designation of any paying agent; however the Company will at all
times be required to maintain a paying agent in each place of payment for the
Junior Subordinated Debentures.
 
     Any moneys deposited with the Debenture Trustee or any paying agent, or
then held by the Company in trust, for the payment of the principal of and
premium, if any, or interest on any Junior Subordinated Debenture (or the Put
Price therefor) and remaining unclaimed for two years after such principal and
premium, if any, or interest (or Put Price) has become due and payable shall, at
the request of the Company, be repaid to the Company and the holder of such
Junior Subordinated Debenture shall thereafter look, as a general unsecured
creditor, only to the Company for payment thereof.
 
  Governing Law
 
     The Indenture and the Junior Subordinated Debentures will be governed by
and construed in accordance with the laws of the State of New York.
 
  Information Concerning the Debenture Trustee
 
     Subject to such provisions, the Debenture Trustee is under no obligation to
exercise any of the powers vested in it by the Indenture at the request of any
holder of Junior Subordinated Debentures, unless offered reasonable indemnity by
such holder against the costs, expenses and liabilities which might be incurred
thereby. The Debenture Trustee is not required to expend or risk its own funds
or otherwise incur personal financial liability in the performance of its duties
if the Debenture Trustee reasonably believes that repayment or adequate
indemnity is not reasonably assured to it.
 
                                      S-56
<PAGE>   57
 
DESCRIPTION OF THE GUARANTEE
 
  General
 
     The Guarantee will be executed and delivered by the Company concurrently
with the issuance by the Trust of the QUIPS for the benefit of the holders from
time to time of the QUIPS. First Union National Bank will initially act as
Guarantee Trustee under the Guarantee. The Guarantee will be qualified under the
Trust Indenture Act. The Guarantee Trustee will hold the Guarantee for the
benefit of the holders of the QUIPS.
 
     The Company will irrevocably and unconditionally agree to pay in full on a
subordinated basis, to the extent set forth herein, the Guarantee Payments (as
defined herein) to the holders of the QUIPS, as and when due, regardless of any
defense, right of set-off or counterclaim that the Trust may have or assert
other than the defense of payment. The following payments with respect to the
QUIPS, to the extent not paid by or on behalf of the Trust (the "Guarantee
Payments"), will be subject to the Guarantee: (a) any accumulated and unpaid
Distributions required to be paid on QUIPS, to the extent the Trust has funds on
hand legally available therefor and (b) the Final Redemption Price with respect
to the QUIPS, to the extent that the Trust has funds on hand legally available
therefor. The Company's obligation to make a Guarantee Payment may be satisfied
by direct payment of the required amounts by the Company to the holders of the
QUIPS or by causing the Trust to pay such amounts to such holders.
 
     The Guarantee will be unsecured and subordinate and rank junior in right of
payment to the extent and in the manner provided therein to all Senior
Indebtedness. See "Risk Factors -- Holding Company Structure; Reliance on
Dividends from Insurance Subsidiaries" in the accompanying Prospectus and
"-- Status" below.
 
     The Guarantee, when taken together with the Company's obligations under the
Declaration, the Junior Subordinated Debentures and the Indenture, including its
obligations to pay costs, expenses, debt, taxes and other liabilities of the
Trust (other than with respect to the Trust Securities), will provide in the
aggregate, a full, irrevocable and unconditional guarantee of all of the Trust's
obligations of payments due under the QUIPS. See "-- Relationship Among the
QUIPS, the Junior Subordinated Debentures and the Guarantee".
 
     The Company also has agreed separately to irrevocably and unconditionally
guarantee the obligations of the Trust with respect to Common Trust Securities
issued by the Trust to the same extent as the Guarantee, except that upon an
Event of Default under the Declaration, holders of QUIPS shall have priority
over holders of Common Trust Securities with respect to Distributions and
payments on liquidation, redemption or otherwise.
 
  Status
 
     The Guarantee will be unsecured and subordinate and rank junior in right of
payment to all Senior Indebtedness to the extent and in the manner provided
therein, which is similar to extent and manner of subordination of the Junior
Subordinated Debentures as described under "-- Description of the Junior
Subordinated Debentures -- Subordination" above.
 
     Because the Company is a holding company, the Guarantee is effectively
subordinated to all existing and future liabilities of the Company's
subsidiaries, except to the extent the Company is a creditor of the subsidiary
recognized as such. See "Risk Factors -- Holding Company Structure; Limitations
on Dividends" in the accompanying Prospectus.
 
     The Guarantee will constitute a guarantee of payment and not of collection
(i.e., the guaranteed party may institute a legal proceeding directly against
the Company to enforce its rights under the Guarantee without first instituting
a legal proceeding against any other person or entity). The Guarantee will be
held for the benefit of the holders of the QUIPS. The Guarantee will not be
discharged except by payment of the Guarantee Payments in full to the extent not
paid by the Trust
 
                                      S-57
<PAGE>   58
 
or upon distribution to the holders of the QUIPS of the Junior Subordinated
Debentures. The Guarantee does not place a limitation on the amount of Senior
Indebtedness that may be incurred by the Company. The Company expects from time
to time to incur indebtedness constituting Senior Indebtedness.
 
  Events of Default
 
     An event of default under the Guarantee will occur upon the failure of the
Company to perform any of its payment or other obligations thereunder. The
holders of a majority in Liquidation Amount of the QUIPS will have the right to
(a) waive any past event of default under the Guarantee and its consequences,
whereby such event of default shall cease to exist and any event of default
under the Guarantee arising therefrom shall be deemed to have been cured for
every purpose of the Guarantee and (b) direct the time, method and place of
conducting any proceeding for any remedy available to the Guarantee Trustee in
respect of the Guarantee or to direct the exercise of any trust or power
conferred upon the Guarantee Trustee under the Guarantee.
 
     Any holder of the QUIPS may institute a legal proceeding directly against
the Company to enforce its rights under the Guarantee without first instituting
a legal proceeding against the Trust, the Guarantee Trustee or any other person
or entity.
 
     The Company, as guarantor, will be required to file annually with the
Guarantee Trustee a certificate as to whether or not the Company is in
compliance with all the conditions and covenants applicable to it under the
Guarantee.
 
  Certain Covenants of the Company
 
     In the Guarantee, the Company will covenant that, so long as any QUIPS
remain outstanding, if there shall have occurred any event that is or would
constitute an event of default under the Guarantee, that is continuing, or the
Declaration, then the Company will not take any of the prohibited actions
described under "-- Description of the Junior Subordinated Debentures -- Certain
Covenants of the Company".
 
  Amendments and Assignment
 
     Except with respect to any changes that do not adversely affect the rights
of holders of the QUIPS in any material respect (in which case no approval will
be required), the Guarantee may not be amended without the prior approval of the
holders of a majority in Liquidation Amount of such outstanding QUIPS. The
manner of obtaining any such approval will be as set forth under "-- Description
of the QUIPS -- Voting Rights; Amendment of the Declaration". All guarantees and
agreements contained in the Guarantee Agreement shall bind the successors,
assigns, receivers, trustees and representatives of the Company and shall inure
to the benefit of the holders of the QUIPS then outstanding.
 
  Termination
 
     The Guarantee will terminate and be of no further force and effect upon
full payment of the Final Redemption Price of the QUIPS, upon full payment of
the amounts payable upon liquidation of the Trust and distribution of the Junior
Subordinated Debentures to the holders of the QUIPS or at such other time when
there are no longer any QUIPS outstanding. The Guarantee will continue to be
effective or will be reinstated, as the case may be, if at any time any holder
of the QUIPS must restore payment of any sums paid under the QUIPS or the
Guarantee.
 
  Information Concerning the Guarantee Trustee
 
     The Guarantee Trustee may be appointed or removed by the Guarantor without
cause at any time, except during an event of default under the Guarantee. The
Guarantee Trustee is under no
 
                                      S-58
<PAGE>   59
 
obligation to exercise any of the powers vested in it by the Guarantee at the
request of any holder of QUIPS, unless offered reasonable indemnity against the
costs, expenses and liabilities which might be incurred thereby. The Guarantee
Trustee is not required to expend or risk its own funds or otherwise incur
personal financial liability in the performance of its duties if it reasonably
believes that repayment or adequate indemnity is not reasonably assured to it.
 
     The Company or its affiliates maintain certain business relationships with
the Guarantee Trustee and its affiliates in the ordinary course of business.
 
  Governing Law
 
     The Guarantee will be governed by and construed in accordance with the laws
of the State of New York.
 
RELATIONSHIP AMONG THE QUIPS, THE JUNIOR SUBORDINATION DEBENTURES AND THE
GUARANTEE
 
  Full and Unconditional Guarantee
 
     Payments of Distributions and other amounts due on the QUIPS (to the extent
the Trust has funds on hand legally available for the payment of such
Distributions) will be irrevocably guaranteed by the Company as and to the
extent set forth under "Description of the Guarantee". If and to the extent that
the Company does not make the required payments on the Junior Subordinated
Debentures, the Trust will not have sufficient funds to make the related
payments, including Distributions, on the QUIPS. The Guarantee will not cover
any such payment unless and until the Trust has sufficient funds for the payment
therefor. The Guarantee, when taken together with the Company's obligations
under the Junior Subordinated Debentures, the Indenture and the Declaration,
including its obligations to pay costs, expenses, debts, taxes and other
liabilities of the Trust (other than with respect to the Trust Securities), will
provide, in the aggregate, a full, irrevocable and unconditional guarantee of
payments of Distributions and other amounts due on the QUIPS. The obligations of
the Company under the Guarantee will be unsecured and subordinate and rank
junior in right of payment to all Senior Indebtedness.
 
  Sufficiency of Payments
 
     As long as payments of interest and other payments are made when due on the
Junior Subordinated Debentures, such payments will be sufficient to cover
Distributions and other payments due on the QUIPS, primarily because: (a) the
aggregate principal amount of the Junior Subordinated Debentures will be equal
to the aggregate Liquidation Amount of the QUIPS and Common Trust Securities;
(b) the interest rate and interest and other payment dates on the Junior
Subordinated Debentures will match the distribution rate and Distribution and
other payment dates for the Trust Securities; (c) the Company shall pay for all
and any costs, expenses, taxes and other liabilities of the Trust except the
Trust's obligations to holders of Trust Securities under such Trust Securities;
and (d) the Declaration will provide that the Trust is not authorized to engage
in any activity that is not consistent with the limited purposes thereof.
 
  Enforcement of Rights of Holders of QUIPS
 
     If the Company fails to make interest or other payments on the Junior
Subordinated Debentures when due (after giving effect to any Extension Period),
the Declaration provides a mechanism whereby the holders of the QUIPS (or, for
so long as QUIPS underlie Normal Units, the holders of the Normal Units) may
direct the Property Trustee to enforce its rights under the Junior Subordinated
Debentures. If the Property Trustee fails to enforce its rights under the Junior
Subordinated Debentures after a majority in Liquidation Amount of QUIPS have so
directed the Property Trustee, a holder of record of the QUIPS (or, for so long
as QUIPS underlie Normal Units, a holder of record of Normal Units) may, to the
fullest extent permitted by law, institute a legal proceeding against the
Company to enforce the Property Trustee's rights under the Junior Subordinated
Debentures
                                      S-59
<PAGE>   60
 
without first instituting any legal proceedings against the Property Trustee or
any other person or entity. Notwithstanding the foregoing, if an Event of
Default has occurred and is continuing and such event is attributable to the
failure of the Company to pay principal or interest on the Junior Subordinated
Debentures on the respective dates such principal or interest is payable, after
giving effect to any Extension Period, then a holder of record of QUIPS (or, for
so long as QUIPS underlie Normal Units, a holder of record of Normal Units) may
institute a Direct Action for payment to such holder of the portion of such
principal or interest attributable to Junior Subordinated Debentures having a
principal amount equal to the aggregate Liquidation Amount of the QUIPS held by
such holder (or underlying such holder's Normal Units). In connection with such
Direct Action, the Company will be subrogated to the rights of such holder of
QUIPS (or Normal Units) under the Declaration to the extent of any payment made
by the Company to such holder of QUIPS in such Direct Action; provided, however,
that no such subrogation right may be exercised so long as an Event of Default
has occurred and is continuing.
 
     In addition, a holder of QUIPS may institute a legal proceeding directly
against the Company to enforce its rights under the Guarantee without first
instituting a legal proceeding against the Guarantee Trustee, the Trust or any
other person or entity.
 
     A default or event of default under any Senior Indebtedness would not
constitute a default or Event of Default under the Declaration. However, in the
event of payment defaults under, or acceleration of, Senior Indebtedness, the
subordination provisions of the Indenture will provide that no payments may be
made in respect of the Junior Subordinated Debentures until such Senior
Indebtedness has been paid in full or any payment default thereunder has been
cured or waived. Failure to make required payments on Junior Subordinated
Debentures would constitute an Event of Default under the Declaration.
 
  Limited Purpose of the Trust
 
     The QUIPS will represent preferred undivided beneficial interests in the
assets of the Trust, and the Trust exists for the sole purpose of issuing and
selling the Trust Securities, using the proceeds from the sale of the Trust
Securities to acquire the Junior Subordinated Debentures and engaging in only
those other activities necessary or incidental thereto.
 
  Rights Upon Dissolution
 
     Upon any voluntary or involuntary liquidation or bankruptcy of the Company,
the Property Trustee, as holder of the Junior Subordinated Debentures, would be
a subordinated creditor of the Company, subordinated in right of payment to all
Senior Indebtedness as set forth in the Indenture, but entitled to receive
payment in full of principal (and premium, if any) and interest, before any
stockholders of the Company receive payments or distributions. Since the Company
will be the guarantor under the Guarantee and will agree to pay for all costs,
expenses and liabilities of the Trust (other than the Trust's obligations to the
holders of its Trust Securities), the positions of a holder of QUIPS and a
holder of Junior Subordinated Debentures relative to other creditors and to
stockholders of the Company in the event of liquidation or bankruptcy of the
Company are expected to be substantially the same.
 
                                      S-60
<PAGE>   61
 
                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
     The following summary of the principal United States federal income tax
consequences of the purchase, ownership and disposition of Units, QUIPS and
Common Stock is based on the views of Sidley & Austin, counsel to the Company.
No statutory, judicial or administrative authority directly addresses the tax
treatment of Units or instruments similar to Units for United States federal
income tax purposes. As a result, no assurance can be given that the Internal
Revenue Service (the "IRS") will agree with the tax consequences described
herein or that these consequences will not be successfully challenged. This
summary deals only with Units, QUIPS and Common Stock held as capital assets by
purchasers who purchase Units in the initial offering at the issue price and who
or which are (i) citizens or residents of the United States, (ii) corporations
or partnerships created or organized in or under the laws of the United States
or any state thereof or the District of Columbia,(iii) estates the income of
which is subject to United States federal income taxation without regard to
source, or (iv) trusts that are United States persons for federal income tax
purposes. It does not address consequences to special classes of holders,
including dealers in securities or currencies, financial institutions, insurance
companies, tax-exempt entities, taxpayers subject to the alternative minimum
tax, non-United States persons or taxpayers holding the Purchase Contracts,
QUIPS or Common Stock as part of a "straddle" or a hedging or conversion
transaction or other integrated investment. Moreover, the effect of any
applicable estate and gift tax laws or state, local or foreign tax laws is not
discussed. PROSPECTIVE INVESTORS SHOULD CONSULT THEIR TAX ADVISORS CONCERNING
THE TAX CONSEQUENCES OF AN INVESTMENT IN THE UNITS, INCLUDING THE APPLICATION OF
STATE, LOCAL, FOREIGN OR OTHER TAX LAWS AND THE POSSIBLE EFFECTS OF CHANGES IN
FEDERAL OR OTHER TAX LAWS.
 
     This summary is based upon the Internal Revenue Code of 1986, as amended
(the "Code"), Treasury regulations issued thereunder, published rulings and
court decisions, each as currently in effect and all of which are subject to
change. Any such changes may be applied retroactively in a manner that could
cause the tax consequences to vary substantially from the consequences described
below, possibly adversely affecting a holder of Units, QUIPS or Common Stock.
 
     This discussion assumes that, in connection with the formation of the
Units, the Underwriters will be acting on behalf of the holders and will (a)
sell the Call Options to the Call Option Holder and apply the proceeds from such
sale (the "Call Premium") together with the amount paid directly by the holders
to the Underwriters (the "Purchase Price") to the purchase of the Units and (b)
enter into the Purchase Contracts with the Company and that holders will assume
the rights and obligations arising from these actions undertaken on their
behalf. This discussion also assumes that the Call Options will be exercised on
the Call Option Expiration Date. Accordingly, this discussion does not address
the tax consequences of holding QUIPS after the Call Option Expiration Date or
of recognition of gain or loss on a disposition of the QUIPS after that date.
 
CLASSIFICATION OF THE TRUST
 
     The Trust will, for United States federal income tax purposes, be
classified as a grantor trust and not as an association taxable as a
corporation. As a result, each holder of QUIPS will be treated as owning an
undivided beneficial interest in the Junior Subordinated Debentures, and each
holder will be required to include in gross income the items of income realized
with respect to the holder's allocable share of the Junior Subordinated
Debentures.
 
TREATMENT OF THE CALL PREMIUM
 
     A holder will not be subject to tax in respect of the receipt of the Call
Premium at the time the Call Premium is received. Rather, the amount of the Call
Premium will be included in the amount realized by a holder when the Call Option
is exercised (see "-- Exercise of the Call Option and Ownership of Treasury
Securities," below) or the Units are sold (see "-- Sale or Disposition of
Units," below).
 
                                      S-61
<PAGE>   62
 
INITIAL TAX BASIS OF QUIPS
 
     The amount paid by a holder for a Unit, which, for United States federal
income tax purposes, will equal the sum of the Purchase Price plus the amount of
the Call Premium deemed to have been received by such holder and paid to the
Company in partial payment for the Units, will be allocated between the QUIPS
and the Purchase Contract included in such Unit in proportion to their
respective fair market values at the time of purchase. Such allocation will
establish each holder's initial tax basis in the QUIPS (which is to say, the
undivided beneficial interest in the Junior Subordinated Debentures which the
QUIPS represent) and the Purchase Contract. Consistent with the documentation,
and reasonably consistent with the facts and circumstances, the Company intends
to take the position that, at the time of issuance of the Unit, the fair market
value of the Purchase Contract (including the holder's obligation to pay
Contract Fees to, or right to receive Contract Fees from, the Company) equals
zero, and the entire amount paid for the Unit, including the Call Premium, is
allocable to the QUIPS. Under Treasury regulations dealing with determination of
the issue price of a debt instrument that is part of an investment unit, the
Company's position will be binding upon each holder unless the holder explicitly
discloses a contrary position on a statement attached to the holder's timely
filed United States federal income tax return for the taxable year in which
Units are acquired by such holder.
 
     Assuming the above allocation, the holder's basis in the QUIPS will exceed
the amount payable at maturity with respect to the QUIPS by the amount of the
Call Premium. Because the Junior Subordinated Debentures will be classified as
contingent debt instruments for United States federal income tax purposes, this
excess will not be treated as "bond premium" that is amortizable at the holder's
election. Instead, this excess will be taken into account in determining the
issue price of the Junior Subordinated Debentures and in determining the yield
at which holders will be required to accrue income. See "-- Interest Received on
the QUIPS," below.
 
INTEREST RECEIVED ON THE QUIPS
 
     Because of the ability of the Rate Increase Agent to increase the QUIPS and
Debenture Rate, the Junior Subordinated Debentures will be classified as
contingent debt instruments subject to the "noncontingent bond method" as set
forth in applicable Treasury regulations. As discussed below, the Company does
not believe that classification of the Junior Subordinated Debentures as
contingent debt instruments will require holders to recognize taxable income
that differs materially from the cash payments of interest on the QUIPS. As also
discussed below, however, as a result of classification of the Junior
Subordinated Debentures as contingent debt instruments, any gain realized on
sale or exchange of the QUIPS may be treated as ordinary income, in whole or in
part. See "-- Sale or Disposition of Units," below.
 
     Under the noncontingent bond method, the yield on the Junior Subordinated
Debentures is projected based on the yield on a hypothetical noncontingent bond
with similar terms. Based on that yield (the "comparable yield"), a projected
schedule of payments is determined. In general, holders of QUIPS will be
required to accrue interest income from the Junior Subordinated Debentures
through the Call Option Expiration Date under the rules applicable to debt
instruments with OID, on the assumption that the projected amounts will actually
be paid. Under these rules, none of the stated interest on the Junior
Subordinated Debentures will be "qualified stated interest" and, accordingly,
all payments of stated interest will be treated as payments of OID or as return
of principal.
 
     Under the noncontingent bond method, holders of a contingent debt
instrument generally must take into account adjustments if contingent payments
are fixed at amounts that differ from their projected amounts. Holders who do
not hold QUIPS after the Call Option Expiration Date will not be required to
take into account any such adjustments, except in connection with any gain
realized by the holder pursuant to exercise of the Call Option. See "-- Sale or
Disposition of Units," below.
 
                                      S-62
<PAGE>   63
 
     The Company has determined the comparable yield to be      %. Applied to
the issue price of the Junior Subordinated Debentures (     % of their principal
amount), this comparable yield results in a projected payment of $     , per
$100 of Stated Amount of the Junior Subordinated Debentures, for each quarter
ending on or prior to the Call Option Expiration Date. Thus, the amount of the
projected payment for each such quarter is equal to the amount of the cash
payment for each such quarter. The projected payment, per $100 of Stated Amount,
for each quarter ending after the Call Option Expiration Date and prior to the
QUIPS and Debenture Maturity Date, is $     . The projected payment, per $100 of
Stated Amount, at the QUIPS and Debenture Maturity Date is $     .
 
     The foregoing comparable yield and projected payment schedule will be used
by the Company for purposes of determining its own taxable income and for any
required information reporting.
 
     If a holder of QUIPS does not use this projected payment schedule to
determine interest accruals, such holder must apply the foregoing rules using
its own projected payment schedule. A holder that determines its own projected
payment schedule must explicitly disclose this fact and the reason why the
holder has used its own schedule (e.g., why the Company's projected payment
schedule is unreasonable). In general, this disclosure must be made on a
statement attached to the timely filed federal income tax return of the holder
for the taxable year that includes the date of its acquisition of the QUIPS.
 
     The foregoing projected payment schedule is supplied by the Company solely
for computing income under the noncontingent bond method for federal income tax
purposes, and does not constitute a projection or representation as to the
amounts that holders of QUIPS will actually receive.
 
     Because income with respect to the QUIPS will constitute interest for
United States federal income tax purposes, corporate holders of Units will not
be entitled to a dividends-received deduction in respect of such income.
 
ADJUSTMENTS TO TAX BASIS IN QUIPS
 
     During the period ending on the Call Option Expiration Date, the initial
tax basis of a holder of QUIPS (see "-- Initial Tax Basis of QUIPS," above) will
be increased by the amount of any interest recognized under the noncontingent
bond method and reduced by payments of interest received with respect to the
Junior Subordinated Debentures. Based on the Company's belief (described in "--
Interest Received on the QUIPS," above) that the taxable income from the Junior
Subordinated Debentures will equal cash payments of interest during this period,
the Company believes that the adjusted tax basis of a holder in the QUIPS as of
the Call Option Expiration Date will equal the initial tax basis.
 
CONTRACT FEES
 
     The holders of Units may be required to pay Contract Fees to the Company,
or the Company may be required to pay Contract Fees to the holders of the Units,
as specified in the final Prospectus for the offering made hereby.
 
     There is no authority for the tax treatment of the Contract Fees under
current law. In the event that the Company is required to pay Contract Fees to
holders, the Company intends to file information returns on the basis that the
Contract Fees are ordinary income to holders for the taxable year of receipt.
Because any Contract Fees received by a holder will not constitute dividends for
United States federal income tax purposes, corporate holders will not be
entitled to a dividends-received deduction as a result of receiving such fees.
Holders should consult their own tax advisors concerning the treatment of the
Contract Fees, including the possibility that the Contract Fees may not be
treated as current income to holders, but would instead reduce a holder's basis
in the Common Stock received upon exercise of the Purchase Contracts, by analogy
to the treatment of rebates. In the event the Company is required to pay
Contract Fees to holders, the Company does
 
                                      S-63
<PAGE>   64
 
not intend to deduct the Contract Fees, because it views them as a cost of
issuing the Common Stock. Contract Fees received by a regulated investment
company should be treated as income derived with respect to such company's
business of investing in stock and securities.
 
     In the event that holders are required to pay Contract Fees to the Company,
it is unlikely that holders will be entitled to a current deduction in respect
of such payments. As a result, although the amount of cash distributions made to
holders in respect of the QUIPS will be reduced by the amount of Contract Fees
payable to the Company, holders will nevertheless recognize ordinary income each
quarter equal to the full amount of OID accrued, subject to the adjustments
described in "-- Interest Received on the QUIPS," above, without a corresponding
deduction for payment of the Contract Fees. Payment of the Contract Fees by
holders will, however, effectively increase the basis of the Common Stock
received under the Purchase Contract. See "-- Purchase of Common Stock under the
Purchase Contract," below.
 
RECEIPT OF JUNIOR SUBORDINATED DEBENTURES UPON LIQUIDATION OF THE TRUST
 
     If the Company were to exercise its right to liquidate the Trust and cause
the Junior Subordinated Debentures to be distributed, on a pro rata basis, to
holders of QUIPS (or to the Collateral Agent on behalf of such holders), such
distribution, under current law, would not be taxable to such holders and each
holder's aggregate tax basis in the Junior Subordinated Debentures would be
equal to such holder's aggregate tax basis in the QUIPS. A holder's holding
period for the Junior Subordinated Debentures would include the period during
which the QUIPS were held by such holder.
 
EXERCISE OF THE CALL OPTION AND OWNERSHIP OF TREASURY SECURITIES
 
     Exercise of the Call Option will be a taxable event to holders of the
Units. As a result, holders will recognize gain or loss equal to the difference
between the amount realized from exercise of the Call Option and their adjusted
tax basis in the QUIPS. The amount treated as the amount realized from exercise
of the Call Option will equal the aggregate of the Call Premium and the fair
market value of the Treasury Securities received, determined as of the Call
Settlement Date. The rules that govern determination of the character of gain or
loss on sale of the QUIPS (including pursuant to the exercise of the Call
Option) are summarized under "-- Sale or Disposition of Units," below.
 
     A holder's basis in the Treasury Securities received as a result of the
exercise of the Call Option will be equal to the fair market value of such
Treasury Securities, determined as of the Call Settlement Date. Except to the
extent the Treasury Securities are "stripped" Treasury securities ("Stripped
Treasury Securities"), the treatment of which is discussed in the immediately
succeeding paragraph, (a) interest with respect to a holder's portion of the
Treasury Securities will be taxable as ordinary income to such holder as it is
received or accrued, in accordance with such holder's normal method of
accounting for United States federal income tax purposes, (b) any excess of a
holder's basis in the Treasury Securities over the amount payable at maturity
may be amortized at the holder's election over the remaining term as a reduction
of interest income and (c) any gain realized by a holder at maturity of the
Treasury Securities will generally be treated as capital gain, unless the
Treasury Securities are considered to have more than a "de minimis" amount of
market discount.
 
     A holder will be required to treat a Stripped Treasury Security received by
such holder as a bond that was originally issued on the date received by such
holder. Stripped Treasury Securities (other than Stripped Treasury Securities
with a remaining term of one year or less) will be considered to have OID in an
amount equal to the difference between the amount payable on such security and
the holder's initial basis in such security (determined as described in the
immediately preceding paragraph). As a result, a holder who receives a Stripped
Treasury Security (other than a Stripped Treasury Security with a remaining term
of one year or less) will be required to include OID in
 
                                      S-64
<PAGE>   65
 
income as ordinary income over the remaining term of such security and will
increase its basis in the Stripped Treasury Security by the amount of OID
included in income with respect to such security.
 
     Stripped Treasury Securities with a remaining term of one year or less
("Short-term Stripped Treasury Securities") generally should be considered to
have "acquisition discount" in an amount equal to the difference between the
principal amount of the Short-term Stripped Treasury Security and the taxpayer's
basis in the Short-term Stripped Treasury Security. A holder using the cash
method of accounting who has not elected to accrue acquisition discount
generally will recognize ordinary income upon maturity of the Short-term
Stripped Treasury Security equal to the amount of such acquisition discount.
 
SALE OR DISPOSITION OF UNITS
 
     A holder will generally recognize gain or loss upon the sale or other
disposition of Units. Such gain or loss will be separately calculated with
respect to the QUIPS or Treasury Securities, as the case may be, and the related
Purchase Contract composing such Units by allocating the sum of any cash and the
fair market value of any property received between the two components in
proportion to their respective fair market values. (For this purpose, and for
purposes of the remainder of this discussion of the consequences of sale or
disposition of Units, reference to the QUIPS includes reference to the undivided
beneficial interest in the Junior Subordinated Debentures represented by the
QUIPS or the Junior Subordinated Debentures received by holders in the event of
a liquidation of the Trust.) The amount considered to be received by a holder
with respect to the sale of the QUIPS will include the value of the assumption
of the holder's obligations under the Call Option, which, in the absence of any
means of independent valuation, will likely be deemed to equal the amount of the
Call Premium previously received by such holder. See "-- Treatment of the Call
Premium," above.
 
     The amount of gain or loss with respect to each component will equal the
difference between the consideration so allocated to each component (reduced, in
the case of certain Treasury Securities, by any amount attributable to accrued
but unpaid interest, which will be taxable as ordinary income) and the holder's
adjusted tax basis in the respective components. Except in the case of gain or
loss with respect to QUIPS, such gain or loss will be capital gain or loss.
 
     If a holder sells or disposes of QUIPS prior to the Call Option Expiration
Date, the rules governing contingent debt instruments treat any gain recognized
as ordinary interest income and treat any loss recognized as ordinary to the
extent of prior interest inclusions. If a holder sells QUIPS on the Call Option
Expiration Date pursuant to exercise of the Call Option, any gain recognized
will be treated as ordinary interest income to the extent that the total of the
actual amounts of the payments due on the QUIPS exceeds the total of the
projected payments on the QUIPS set forth above. See "-- Interest Received on
the QUIPS," above. Any gain in excess of this amount, and any loss, recognized
on such a sale will be treated as capital gain or loss.
 
PURCHASE OF COMMON STOCK UNDER THE PURCHASE CONTRACT
 
     Assuming that the initial basis of the Purchase Contract will be zero (see
"Initial Tax Basis of QUIPS" above), the tax basis of the Common Stock acquired
under a Purchase Contract will equal the amount of cash paid to purchase such
Common Stock (including cash applied by the Collateral Agent upon maturity of
the Treasury Securities), increased by the amount of any Contract Fees paid by
the holder (as discussed above under "-- Contract Fees") and decreased by (a)
the amount of any Contract Fees received by the holder and not previously
included in income and (b) the amount of any cash received in lieu of fractional
shares of Common Stock. A holder will recognize capital gain or loss upon
receipt of cash in lieu of fractional shares of Common Stock equal to the
difference between the amount of cash received and the holder's basis in such
fractional shares. A holder's holding period in the Common Stock purchased
pursuant to the Purchase Contract will begin on the day after the purchase of
such Common Stock.
 
                                      S-65
<PAGE>   66
 
OWNERSHIP OF COMMON STOCK ACQUIRED UNDER THE PURCHASE CONTRACT
 
     Assuming that the Company has current or accumulated earnings and profits
at least equal to the amount of the dividends, a holder will include a dividend
on the Common Stock in income when paid, and the dividend will be eligible for
the dividends-received deduction if received by an otherwise qualifying
corporate holder which meets the holding period and other requirements for such
deduction.
 
     Upon the sale, exchange or other disposition of Common Stock, the holder
will recognize gain or loss equal to the difference between the holder's tax
basis in the Common Stock and the amount realized on the disposition. The gain
or loss will be capital gain or loss.
 
ADJUSTMENT OF SETTLEMENT RATE
 
     Holders of Units might be treated as receiving a constructive distribution
from the Company if (a) the Settlement Rate is adjusted and, as a result of such
adjustment, the proportionate interest of holders of Units in the assets or
earnings and profits of the Company is increased, and (b) the adjustment is not
made pursuant to a reasonable antidilution formula. An adjustment in the
Settlement Rate would not be considered made pursuant to such a formula if the
adjustment were made to compensate for certain taxable distributions with
respect to Common Stock. Thus, under certain circumstances, an increase in the
Settlement Rate is likely to be taxable to holders of Units as a dividend to the
extent of the current or accumulated earnings and profits of the Company.
Holders of Units would be required to include their allocable share of such
constructive dividends in gross income but would not receive any cash related
thereto.
 
                                      S-66
<PAGE>   67
 
                                  UNDERWRITING
 
     Subject to the terms and conditions of the Underwriting Agreement, (a) the
Company has agreed to enter into the Purchase Contracts with each of the
Underwriters named below (the "Underwriters") underlying the respective number
of Units set forth opposite its name below, (b) the Company and the Trust have
agreed to sell to each of the Underwriters the QUIPS underlying the respective
number of Units set forth opposite its name below, and (c) each of such
Underwriters, for whom Goldman, Sachs & Co. and Salomon Brothers Inc are acting
as representatives, has severally agreed to enter into such Purchase Contracts
with the Company, purchase such QUIPS from the Company and the Trust, pledge
under the Pledge Agreement such QUIPS and sell (on behalf of the initial
investors in the Units) to the Call Option Holder the Call Options with respect
to such Units:
 
<TABLE>
<CAPTION>
                        UNDERWRITER                           NUMBER OF UNITS
                        -----------                           ---------------
<S>                                                           <C>
Goldman, Sachs & Co. .......................................
Salomon Brothers Inc .......................................
                                                               ------------
          Total.............................................
                                                               ============
</TABLE>
 
     Under the terms and conditions of the Underwriting Agreement, the
Underwriters are committed to enter into Purchase Contracts, purchase and pledge
QUIPS and sell Call Options with respect to all of the Units offered hereby, if
any Purchase Contracts are entered into, QUIPS are taken and Call Options sold.
 
     The Underwriters propose to offer the Units in part directly to the public
at the initial public offering price set forth on the cover page of this
Prospectus Supplement and in part to certain securities dealers at such price
less a concession of $     per Unit. The Underwriters may allow, and such
dealers may reallow, a concession not in excess of $     per Unit to certain
brokers and dealers. After the Units are released for sale to the public, the
offering price and other selling terms may from time to time be varied by the
representatives.
 
     The Company and the Trust have granted the Underwriters an option
exercisable for 30 days after the date of this Prospectus to enter into Purchase
Contracts and purchase QUIPS underlying up to an aggregate of
additional Units solely to cover over-allotments, if any. If Purchase Contracts
underlying any such additional Units are entered into and QUIPS are purchased,
the Underwriters would pledge under the Pledge Agreement such QUIPS and would
sell to the Call Option Holder the Call Options underlying such Units. If the
Underwriters exercise their over-allotment option, each of the Underwriters has
severally agreed, subject to certain conditions, to effect the foregoing
transactions with respect to approximately the same percentage of such Units
that the respective number of Units set forth opposite its name in the foregoing
table bears to the                Units offered hereby.
 
     The Company has agreed, subject to certain exceptions, that during the
period beginning from the date of this Prospectus and continuing to and
including the date 180 days after the date of this Prospectus, it will not
offer, sell, contract to sell or otherwise dispose of any Units, QUIPS or Common
Stock (other than pursuant to employee stock option or purchase plans existing,
or on the conversion or exchange of convertible or exchangeable securities
outstanding, on the date of this Prospectus Supplement) or any securities of the
Company which are substantially similar to the Common Stock, or which are
convertible into or exchangeable for, or otherwise represent the right to
receive, Common Stock or any such other similar securities, without the prior
written consent of the representatives.
 
     The Units will be a new issue of securities with no established trading
market. Application will be made to list the Normal Units on the NYSE. The
Underwriters have advised the Company that they intend to make a market in the
Normal Units, but they are not obligated to do so and may
 
                                      S-67
<PAGE>   68
 
discontinue market making at any time without notice. No assurance can be given
as to the liquidity of the trading market for the Units.
 
     In connection with the Offering, the Underwriters may purchase and sell the
Units or Common Stock in the open market. These transactions may include
over-allotment and stabilizing transactions and purchases to cover short
positions created by the Underwriters in connection with the Offering.
Stabilizing transactions consist of certain bids or purchases for the purpose of
preventing or retarding a decline in the market price of the Units or Common
Stock, as applicable; and short positions created by the Underwriters involve
the sale by the Underwriters of a greater number of Units than they are required
to purchase from the Company and the Trust in the Offering. The Underwriters
also may impose a penalty bid, whereby selling concessions allowed to
broker-dealers in respect of the Units sold in the Offering may be reclaimed by
the Underwriters if such Units are repurchased by the Underwriters in
stabilizing or covering transactions. These activities may stabilize, maintain
or otherwise affect the market price of the Units or the Common Stock, which may
be higher than the price that might otherwise prevail in the open market, and
these activities, if commenced, may be discontinued at any time. These
transactions may be effected on the NYSE, in the over-the-counter market or
otherwise.
 
     The Company and the Trust have agreed to indemnify the several Underwriters
against certain liabilities, including liabilities under the Securities Act of
1933.
 
                           VALIDITY OF THE SECURITIES
 
     The validity of the Purchase Contracts, the Common Stock issuable upon
settlement thereof, the Junior Subordinated Debentures and the Guarantee being
offered hereby will be passed upon for the Company by Sidley & Austin, Chicago,
Illinois and the validity of the QUIPS will be passed upon for the Trust by
Morris, James, Hitchens & Williams of Wilmington, Delaware, special Delaware
counsel to the Trust. The validity of the Purchase Contracts, the Common Stock
issuable upon settlement thereof, the Junior Subordinated Debentures and the
Guarantee being offered hereby will be passed upon for the Underwriters by
Sullivan & Cromwell, New York, New York. Certain matters relating to United
States Federal income considerations will be passed upon for the Company by
Sidley & Austin, special tax counsel to the Company, and by Sullivan & Cromwell,
special tax counsel to the Underwriters. Sidley & Austin and Sullivan & Cromwell
will rely on the opinion of Joseph K. Haggerty, Esq., Senior Vice President and
General Counsel of the Company, as to matters of Iowa law. Sidley & Austin,
Sullivan & Cromwell and Joseph K. Haggerty will rely on the opinion of Morris,
James, Hitchens & Williams as to matters of Delaware law.
 
                                      S-68
<PAGE>   69
 
                             INDEX OF DEFINED TERMS
 
     Set forth below is a list of the defined terms used in this Prospectus
Supplement and the pages on which the definition of such terms may be found.
 
<TABLE>
<CAPTION>
                            TERM                              PAGE
                            ----                              ----
<S>                                                           <C>
Additional Sums.............................................  S-51
Administrators..............................................  S-20
Aggregate Call Option Exercise Consideration................   S-7
Ameritas Joint Venture......................................  S-24
AmerUs Life.................................................   S-3
AmVestors...................................................   S-3
Applicable Market Value.....................................   S-5
AVLIC.......................................................  S-24
Bank Debt...................................................   S-3
Business Day................................................  S-38
Call Option.................................................   S-7
Call Option Agreement.......................................  S-30
Call Option Expiration Date.................................   S-7
Call Option Holder..........................................   S-7
Call Premium................................................  S-61
Call Settlement Date........................................  S-35
Cash Equivalent of the Aggregate Call Option Exercise
  Consideration.............................................  S-50
Closing Price...............................................  S-31
Code........................................................  S-61
Collateral Agent............................................   S-7
Common Trust Securities.....................................  S-10
Company.....................................................   S-3
Comparable Yield............................................  S-62
Contract Fee Rate...........................................   S-6
Contract Fees...............................................   S-6
Current Market Price........................................  S-34
Debenture Event of Default..................................  S-52
Debenture Trustee...........................................  S-10
Declaration.................................................   S-4
Deferral Rate...............................................   S-9
Delaware Trustee............................................  S-20
Delta.......................................................   S-3
Depositary..................................................  S-37
Direct Action...............................................  S-18
Direct Participants.........................................  S-37
Distribution Date...........................................  S-41
Distributions...............................................  S-42
Exchange Act................................................  S-37
Extension Period............................................  S-42
Final Redemption Price......................................  S-42
GAAP........................................................  S-13
Global Security Certificates................................  S-37
Guarantee...................................................  S-12
Guarantee Payments..........................................  S-57
Guarantee Trustee...........................................  S-12
Indenture...................................................  S-10
Indirect Participants.......................................  S-37
</TABLE>
 
                                      S-69
<PAGE>   70
 
<TABLE>
<CAPTION>
                            TERM                              PAGE
                            ----                              ----
<S>                                                           <C>
Interest Payment Date.......................................  S-49
Investment Company Act......................................  S-46
IRS.........................................................  S-61
Issuer Trustees.............................................   S-4
Junior Subordinated Debenture Put Option....................  S-51
Junior Subordinated Debentures..............................  S-10
Like Amount.................................................  S-42
Liquidation Distribution....................................  S-43
Master Unit Agreement.......................................  S-30
Maximum QUIPS and Debenture Rate............................  S-50
Moody's.....................................................   S-3
Normal Unit.................................................   S-8
Notes Offering..............................................   S-3
NYSE........................................................   S-9
Offerings...................................................   S-3
OID.........................................................  S-18
Participants................................................  S-37
Paying Agent................................................  S-48
Payments on the Units.......................................   S-4
Pledge Agreement............................................  S-30
Pledged Securities..........................................   S-7
Principal Agreements........................................  S-30
Property Account............................................  S-21
Property Trustee............................................  S-20
Prospectus..................................................   S-3
Purchase Contract...........................................   S-6
Purchase Price..............................................  S-61
Put Agent...................................................  S-42
Put Price...................................................  S-51
Quarterly Payment Dates.....................................   S-4
QUIPS.......................................................   S-6
QUIPS and Debenture Maturity Date...........................   S-7
QUIPS and Debenture Rate....................................  S-10
Rate Increase Agent.........................................  S-10
Refinancing Plan............................................   S-3
Senior Indebtedness.........................................  S-55
Senior Notes................................................   S-3
Settlement..................................................   S-4
Settlement Rate.............................................   S-5
Short-term Stripped Treasury Securities.....................  S-65
Sponsor.....................................................   S-4
Stated Amount...............................................   S-4
Stock Purchase Date.........................................   S-4
Stock Repurchase Plan.......................................   S-3
Stripped Treasury Securities................................  S-64
Stripped Units..............................................   S-9
Successor Securities........................................  S-46
Termination.................................................   S-9
Threshold Appreciation Price................................   S-5
Trading Day.................................................  S-31
Treasury Securities.........................................   S-7
</TABLE>
 
                                      S-70
<PAGE>   71
 
<TABLE>
<CAPTION>
                            TERM                              PAGE
                            ----                              ----
<S>                                                           <C>
Trust.......................................................   S-4
Trust Indenture Act.........................................   S-4
Trust Securities............................................  S-10
Underwriters................................................   S-7
Unit Agent..................................................  S-30
Units.......................................................   S-4
Units Offering..............................................   S-3
</TABLE>
 
                                      S-71
<PAGE>   72
 
PROSPECTUS
 
                                  $750,000,000
                           AMERUS LIFE HOLDINGS, INC.
  DEBT SECURITIES, PREFERRED STOCK, CLASS A COMMON STOCK, PURCHASE CONTRACTS,
                               UNITS AND WARRANTS
 
                               AMERUS CAPITAL II
 
                               AMERUS CAPITAL III
            CAPITAL SECURITIES FULLY AND UNCONDITIONALLY GUARANTEED
                    BY AMERUS LIFE HOLDINGS, INC. AND UNITS
                               ------------------
 
    AmerUs Life Holdings, Inc., an Iowa corporation (the "Company"), may offer
and sell from time to time, in one or more series, (i) its debt securities,
consisting of debentures, notes and/or other evidences of indebtedness
representing unsecured obligations of the Company (the "Debt Securities"), (ii)
shares of its preferred stock, no par value per share ("Preferred Stock"), (iii)
shares of its Class A Common Stock, no par value per share ("Class A Common
Stock"), (iv) Purchase Contracts ("Purchase Contracts") to purchase shares of
Class A Common Stock, (v) Units, each representing ownership of a Purchase
Contract and Capital Securities (as defined herein) or debt obligations of third
parties, including U.S. Treasury securities, securing the holder's obligation to
purchase Class A Common Stock under the Purchase Contracts ("Units"), including
but not limited to, Adjustable Conversion-rate Equity Security Units and (vi)
warrants to purchase Debt Securities, Preferred Stock, Class A Common Stock or
other securities or rights ("Warrants").
 
    AmerUs Capital II and AmerUs Capital III (each, an "AmerUs Trust"),
statutory business trusts formed under the laws of the State of Delaware, may
offer, from time to time, Capital Securities, representing preferred undivided
beneficial interests in the assets of the respective AmerUs Trusts ("Capital
Securities"). The payment of periodic cash distributions ("Distributions") with
respect to Capital Securities out of moneys held by each of the AmerUs Trusts,
and payments on liquidation, redemption or otherwise with respect to such
Capital Securities, will be guaranteed by the Company to the extent described
herein (each, a "Guarantee"). See "Description of Capital Securities of the
AmerUs Trusts" and "Description of Guarantees." The Company's obligations under
the Guarantees will rank junior and subordinate in right of payment to the
Senior Indebtedness (as defined herein) of the Company. See "Description of
Guarantees -- Status of the Guarantees." Junior subordinated debt ("Junior
Subordinated Debt") may be issued and sold by the Company in one or more series
to an AmerUs Trust or a trustee of such AmerUs Trust in connection with the
investment of the proceeds from the offering of Capital Securities and Common
Securities (as defined herein) of such AmerUs Trust. The Junior Subordinated
Debt purchased by an AmerUs Trust may be subsequently distributed pro rata to
holders of Capital Securities and Common Securities in connection with the
dissolution of such AmerUs Trust. The Junior Subordinated Debt will rank junior
and subordinate in right of payment to the Senior Indebtedness of the Company.
The Debt Securities, Preferred Stock, Class A Common Stock, Purchase Contracts,
Units, Warrants and Capital Securities are herein collectively referred to as
the "Securities."
 
    Certain specific terms of the particular Securities in respect of which this
Prospectus is being delivered will be set forth in an accompanying supplement to
this Prospectus (the "Prospectus Supplement"), which will describe, without
limitation and where applicable, the following: (i) in the case of Debt
Securities, the specific designation, aggregate principal amount, ranking as
senior or subordinated Debt Securities, denomination, maturity, premium, if any,
interest rate (which may be fixed or variable), time and method of calculating
interest, if any, place or places where principal of, premium, if any, and
interest, if any, on such Debt Securities will be payable, the currencies or
currency units in which principal of, premium, if any, and interest, if any, on
such Debt Securities will be payable, any terms of redemption or conversion, any
sinking fund provisions, the purchase price, any listing on a securities
exchange, any right of the Company to defer payment of interest on the Junior
Subordinated Debt and the maximum length of such deferral period, the method of
distribution and other special terms; (ii) in the case of Preferred Stock, the
specific designation, stated value and liquidation preference per share and
number of shares offered, the initial public offering or purchase price,
dividend rate (which may be fixed or variable), method of calculating payment of
dividends, place or places where dividends on such Preferred Stock will be
payable, any terms of redemption, dates on which dividends shall be payable and
dates from which dividends shall accrue, any listing on a securities exchange,
voting and other rights, including conversion or exchange rights, if any, the
method of distribution, and other special terms; (iii) in the case of Class A
Common Stock, the number of shares offered, the initial offering price, market
price and dividend information and the method of distribution; (iv) in the case
of Purchase Contracts, the number of shares of Class A Common Stock issuable
thereunder, the purchase price of the Class A Common Stock, the date or dates on
which the Class A Common Stock is required to be purchased by the holders of the
Purchase Contracts, any periodic payments or contract fees required to be paid
by the Company to the holders of the Purchase Contracts or vice versa, and the
terms of the offering and sale thereof; (v) in the case of Units, the specific
terms of the Purchase Contracts and any Capital Securities or debt obligations
of third parties held by a holder securing such holder's obligation to purchase
the Class A Common Stock under the Purchase Contracts, and the terms of the
offering and sale thereof; (vi) in the case of Warrants, the specific
designation, the number, purchase price, exercise price and other terms thereof,
any listing of the Warrants or the underlying Securities on a securities
exchange or any other terms in connection with the offering, sale and exercise
of the Warrants, as well as the terms on which and the Securities for which such
Warrants may be exercised; and (vii) in the case of Capital Securities, the
specific designation, number of securities, liquidation amount per security, the
purchase price, any listing on a securities exchange, distribution rate (or
method of calculation thereof), dates on which distributions shall be payable
and dates from which distributions shall accrue, any voting rights, terms for
any conversion or exchange into other securities, any redemption, exchange or
sinking fund provisions, any rights of the applicable Trust to defer payment of
interest on the Capital Securities and the maximum length of such deferral, any
other rights, preferences, privileges, limitations or restrictions relating to
the Capital Securities, the specific terms and provisions of the applicable
Guarantee and the terms upon which the proceeds of the sale of the Capital
Securities shall be used to purchase a specific series of Junior Subordinated
Debt of the Company.
 
    The offering price to the public of the Securities will be limited to U.S.
$750,000,000 in the aggregate (or its equivalent (based on the applicable
exchange rate at the time of issue), if Securities are offered for consideration
denominated in one or more foreign currencies, currency units or composite
currencies as shall be designated by the Company and indicated in the applicable
Prospectus Supplement). The Debt Securities may be denominated in United States
dollars or, at the option of the Company if so specified in the applicable
Prospectus Supplement, in one or more foreign currencies or currency units. The
Debt Securities may be issued in registered form or bearer form, or both. If so
specified in the applicable Prospectus Supplement, Securities of one or more
classes or series may be issued in whole or in part in the form of one or more
temporary or permanent global securities.
 
    The Class A Common Stock is listed on the New York Stock Exchange (the
"NYSE") under the symbol "AMH."
 
    SEE "RISK FACTORS" BEGINNING ON PAGE 13 FOR CERTAIN CONSIDERATIONS RELEVANT
TO AN INVESTMENT IN ANY OF THE SECURITIES OFFERED HEREBY.
 
    The Securities may be sold to or through underwriters, dealers or agents or
directly to purchasers, to AmerUs Group Co., the Company's parent (the "AmerUs
Group") or through a combination of such methods. See "Plan of Distribution."
The names of any underwriters, dealers or agents involved in the sale of the
Securities in respect of which this Prospectus is being delivered and any
applicable fee, commission or discount arrangements will be set forth in a
Prospectus Supplement. See "Plan of Distribution" for possible indemnification
arrangements for dealers, underwriters and agents.
 
    This Prospectus may not be used to consummate sales of Securities unless
accompanied by a Prospectus Supplement.
 
                               ------------------
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
 
                 The date of this Prospectus is June 10, 1998.
<PAGE>   73
 
     THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE IOWA
COMMISSIONER OF INSURANCE NOR HAS THE IOWA COMMISSIONER OF INSURANCE RULED UPON
THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
                           -------------------------
 
     THE COMPANY IS AN INDIRECT SUBSIDIARY OF AMERICAN MUTUAL HOLDING COMPANY,
AN IOWA MUTUAL INSURANCE HOLDING COMPANY ("AMHC"). IOWA LAW REQUIRES THAT AMHC
AT ALL TIMES OWN DIRECTLY, OR INDIRECTLY THROUGH ONE OR MORE INTERMEDIATE
HOLDING COMPANY SUBSIDIARIES, SHARES OF CAPITAL STOCK OF AMERUS LIFE INSURANCE
COMPANY ("AMERUS LIFE") WHICH CARRY THE RIGHT TO CAST A MAJORITY OF THE VOTES
ENTITLED TO BE CAST BY ALL OF THE OUTSTANDING SHARES OF AMERUS LIFE'S CAPITAL
STOCK. ANY ATTEMPT TO EFFECT ANY TRANSACTION PURSUANT TO WHICH AMHC WOULD NO
LONGER HAVE SUCH VOTING MAJORITY WOULD BE NULL AND VOID AND INEFFECTUAL TO
TRANSFER SUCH VOTING RIGHTS.
                           -------------------------
 
     THE IOWA INSURANCE HOLDING COMPANY SYSTEMS STATUTE APPLICABLE TO THE
COMPANY PROVIDES THAT NO PERSON MAY SEEK TO ACQUIRE CONTROL OF THE COMPANY, AND
THUS INDIRECT CONTROL OF AMERUS LIFE, WITHOUT THE PRIOR APPROVAL OF THE IOWA
COMMISSIONER OF INSURANCE. GENERALLY, ANY PERSON WHO DIRECTLY OR INDIRECTLY
OWNS, CONTROLS, HOLDS WITH POWER TO VOTE OR HOLDS PROXIES REPRESENTING 10% OR
MORE OF THE COMPANY'S VOTING SECURITIES (CONSISTING OF THE COMBINED OUTSTANDING
SHARES OF CLASS A COMMON STOCK AND CLASS B COMMON STOCK) WOULD BE PRESUMED TO
HAVE ACQUIRED SUCH CONTROL, UNLESS SUCH PRESUMPTION IS REBUTTED BY A SHOWING
THAT SUCH CONTROL DOES NOT EXIST IN FACT.
                           -------------------------
 
     FOR NORTH CAROLINA INVESTORS: THE COMMISSIONER OF INSURANCE OF THE STATE OF
NORTH CAROLINA HAS NOT APPROVED OR DISAPPROVED THIS OFFERING NOR HAS SUCH
COMMISSIONER RULED UPON THE ACCURACY OR THE ADEQUACY OF THE PROSPECTUS.
                           -------------------------
 
     THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 PROVIDES A SAFE HARBOR
FOR FORWARD-LOOKING STATEMENTS. A NUMBER OF MATTERS AND SUBJECT AREAS DISCUSSED
IN THE DOCUMENTS INCORPORATED HEREIN BY REFERENCE AND IN THE SECTIONS OF THIS
PROSPECTUS ENTITLED "REORGANIZATION AND RECENT ACQUISITIONS," "MANAGEMENT'S
DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND FINANCIAL CONDITION" AND
"BUSINESS" AND ELSEWHERE IN THIS PROSPECTUS AND THE APPLICABLE PROSPECTUS
SUPPLEMENT ARE NOT LIMITED TO HISTORICAL OR CURRENT FACTS AND DEAL WITH
POTENTIAL FUTURE CIRCUMSTANCES AND DEVELOPMENTS. FACTORS THAT MAY CAUSE ACTUAL
RESULTS TO DIFFER MATERIALLY FROM THOSE CONTEMPLATED OR PROJECTED IN SUCH
FORWARD-LOOKING STATEMENTS INCLUDE, AMONG OTHERS, THE FOLLOWING POSSIBILITIES:
(I) HEIGHTENED COMPETITION, INCLUDING THE ENTRY OF NEW COMPETITORS AND THE
DEVELOPMENT OF NEW PRODUCTS BY COMPETITORS; (II) ADVERSE STATE AND FEDERAL
LEGISLATION AND REGULATION, INCLUDING INCREASES IN MINIMUM CAPITAL AND RESERVES,
AND OTHER FINANCIAL VIABILITY REQUIREMENTS AND ADDITIONAL REGULATIONS OF MUTUAL
INSURANCE HOLDING COMPANIES; (III) FAILURE TO MAINTAIN EFFECTIVE DISTRIBUTION
CHANNELS IN ORDER TO OBTAIN NEW CUSTOMERS OR FAILURE TO RETAIN EXISTING
CUSTOMERS; (IV) INABILITY TO CARRY OUT MARKETING AND SALES PLANS, INCLUDING,
AMONG OTHERS, CHANGES TO CERTAIN PRODUCTS AND ACCEPTANCE OF THE REVISED PRODUCTS
IN THE MARKET; (V) LOSS OF
 
                                        2
<PAGE>   74
 
KEY EXECUTIVES; (VI) CHANGES IN INTEREST RATES CAUSING A REDUCTION OF INVESTMENT
INCOME OR A REDUCTION IN DEMAND FOR CERTAIN OF THE COMPANY'S PRODUCTS; (VII)
GENERAL ECONOMIC AND BUSINESS CONDITIONS WHICH ARE LESS FAVORABLE THAN EXPECTED;
(VIII) UNANTICIPATED CHANGES IN INDUSTRY TRENDS; (IX) INACCURACIES IN
ASSUMPTIONS REGARDING FUTURE PERSISTENCY, MORTALITY AND INTEREST RATES USED IN
CALCULATING RESERVE AMOUNTS; (X) ADVERSE CHANGES IN RATINGS ASSIGNED BY RATING
AGENCIES; (XI) CHANGES IN TAX LAWS WHICH NEGATIVELY AFFECT DEMAND FOR THE
COMPANY'S PRODUCTS OR THE APPLICABILITY OF CERTAIN TAXES TO THE COMPANY
(INCLUDING 1998 TAX PROPOSALS OF THE CLINTON ADMINISTRATION RELATING TO
ANNUITIES); (XII) THE RISK FACTORS OR UNCERTAINTIES LISTED HEREIN OR LISTED FROM
TIME TO TIME IN ANY PROSPECTUS SUPPLEMENT OR ANY DOCUMENT INCORPORATED BY
REFERENCE HEREIN; AND (XIII) WITH RESPECT TO COST SAVINGS THAT ARE EXPECTED TO
BE REALIZED FROM, AND COSTS ASSOCIATED WITH, THE RECENT ACQUISITIONS OF DELTA
LIFE CORPORATION ("DELTA") AND AMVESTORS FINANCIAL CORPORATION ("AMVESTORS"),
THE FOLLOWING POSSIBILITIES: (A) THE ESTIMATED COST SAVINGS TO BE REALIZED
THROUGH COMBINING CERTAIN FUNCTIONS OF THE COMPANY, DELTA AND AMVESTORS TO
ELIMINATE REDUNDANCIES AND BETTER SERVE THE COMBINED BUSINESSES' CUSTOMERS, AND
REDUCTIONS IN STAFF CANNOT BE FULLY REALIZED BECAUSE THE CHANGES ARE NOT MADE OR
UNANTICIPATED ADDED COSTS ARE INCURRED; AND (B) COSTS OR DIFFICULTIES RELATED TO
THE INTEGRATION OF THE BUSINESSES OF DELTA AND AMVESTORS WITH THE COMPANY'S
OTHER BUSINESSES ARE GREATER THAN EXPECTED. A VARIETY OF FACTORS COULD CAUSE THE
COMPANY'S ACTUAL RESULTS TO DIFFER MATERIALLY FROM THE EXPECTED RESULTS
EXPRESSED IN THE COMPANY'S FORWARD-LOOKING STATEMENTS, INCLUDING THOSE SET FORTH
IN THE RISK FACTORS AND ELSEWHERE IN THIS PROSPECTUS AND IN THE COMPANY'S OTHER
FILINGS WITH THE COMMISSION.
 
     NO DEALER, SALESMAN OR OTHER INDIVIDUAL HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, ANY
ACCOMPANYING PROSPECTUS SUPPLEMENT OR THE DOCUMENTS INCORPORATED OR DEEMED
INCORPORATED BY REFERENCE HEREIN. IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR ANY UNDERWRITER, DEALER OR AGENT. THIS PROSPECTUS DOES NOT CONSTITUTE AN
OFFER TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, ANY SECURITIES OTHER THAN
THE REGISTERED SECURITIES TO WHICH IT RELATES, OR AN OFFER TO SELL OR A
SOLICITATION OF AN OFFER TO BUY THOSE SECURITIES TO WHICH IT RELATES, IN ANY
JURISDICTION WHERE, OR TO ANY PERSON TO WHOM, IT IS UNLAWFUL TO MAKE SUCH OFFER
OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPECTUS OR ANY PROSPECTUS
SUPPLEMENT NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE
ANY IMPLICATION THAT THERE HAS NOT BEEN ANY CHANGE IN THE FACTS SET FORTH IN
THIS PROSPECTUS OR IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.
 
                                        3
<PAGE>   75
 
                             AVAILABLE INFORMATION
 
     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
therewith, files reports, proxy statements and other information with the
Commission. Such reports, proxy statements and other information filed by the
Company with the Commission can be inspected and copied at the public reference
facilities maintained by the Commission at 450 Fifth Street, N.W., Room 1024,
Washington, D.C. 20549, and at the regional offices of the Commission located
at: 7 World Trade Center, 13th Floor, New York, New York 10048; and Citicorp
Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of
such material can be obtained from the Public Reference Section of the
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, upon payment of
the prescribed rates. In addition, the Commission maintains a Web site at
http://www.sec.gov that contains reports, proxy and information statements and
other information regarding registrants, including the Company, that file
electronically with the Commission. The Company's reports are also on file at
the offices of the NYSE, 20 Broad Street, New York, New York 10005.
 
     The Company and the AmerUs Trusts have filed with the Commission a
Registration Statement on Form S-3 under the Securities Act of 1933, as amended
(the "Securities Act"), with respect to the Securities offered hereby. This
Prospectus, which constitutes part of the Registration Statement, does not
contain all of the information set forth in the Registration Statement and the
exhibits thereto, certain parts of which are omitted in accordance with the
rules and regulations of the Commission. Statements contained herein or in any
Prospectus Supplement concerning the provisions of any document do not purport
to be complete and, in each instance, are qualified in all respects by reference
to the copy of such document filed as an exhibit to the Registration Statement
or otherwise filed with the Commission. For further information with respect to
the Company, the AmerUs Trusts and the Securities, reference is hereby made to
such Registration Statement, including the exhibits thereto and the documents
incorporated therein by reference, which can be examined at the Commission's
principal office, 450 Fifth Street, N.W., Washington, D.C. 20549, or copies of
which can be obtained from the Commission at such office upon payment of the
fees prescribed by the Commission.
 
     No separate financial statements of the AmerUs Trusts have been included or
incorporated by reference herein. The Company does not consider such financial
statements material to holders of the Capital Securities because the AmerUs
Trusts are newly formed special purpose entities, have no operating history or
independent operations and are not engaged in, and do not propose to engage in,
any activity other than their holding as trust assets the Junior Subordinated
Debt of the Company and their issuance of the Capital Securities and Common
Securities. See "The Company," "Description of the Capital Securities of the
AmerUs Trusts," "Description of Guarantees," "Description of Debt Securities"
and "Description of Purchase Contracts and Units." The AmerUs Trusts are
statutory business trusts formed under the laws of the State of Delaware. The
Company, as of the date hereof, beneficially owns all of the beneficial
interests in the Trust. The Company's and the AmerUs Trusts' principal executive
offices are located at 699 Walnut Street, Des Moines, Iowa 50309-3948, telephone
number (515) 362-3600.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents previously filed by the Company with the Commission
pursuant to the Exchange Act are incorporated herein by this reference:
 
          1. Annual Report on Form 10-K for the fiscal year ended December 31,
     1997;
 
          2. The description of the Company's Class A Common Stock contained in
     the Registration Statement on Form 8-A filed by the Company with the
     Commission on January 3, 1997, including any amendments or reports filed
     for the purpose of updating such description;
 
          3. The Company's report on Form 8-K filed on October 23, 1997, as
     amended by Form 8-K/A filed January 6, 1998 reporting the acquisition of
     Delta and certain related financial statements; and
 
          4. The Company's report on Form 8-K filed on December 19, 1997, as
     amended by Form 8-K/A filed on March 3, 1998 reporting the acquisition of
     AmVestors and certain related financial statements;
 
          5. Proxy Statement on Schedule 14A filed by the Company with the
     Commission, dated April 13, 1998;
 
                                        4
<PAGE>   76
 
          6. Quarterly Report on Form 10-Q for the fiscal quarter ended March
     31, 1998; and
 
          7. Report on Form 10-K/A for the fiscal year ended December 31, 1997
     filed with the Commission on June 4, 1998.
 
     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date hereof and prior to the
termination of the offering made hereby shall be deemed to be incorporated by
reference in this Prospectus or any Prospectus Supplement and to be part hereof
from the date of filing of such documents.
 
     Any statement contained herein, or in a document all or a portion of which
is incorporated or deemed to be incorporated by reference herein, shall be
deemed to be modified or superseded for purposes of this Prospectus to the
extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed to be incorporated by reference herein
modifies or supersedes such statement. Any such statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Prospectus or any Prospectus Supplement. To the extent
that any proxy statement is incorporated by reference herein, such incorporation
shall not include any information contained in such proxy statement that is not,
pursuant to the Commission's rules, deemed to be "filed" with the Commission or
subject to the liabilities of Section 18 of the Exchange Act.
 
     The Company will provide without charge to each person to whom this
Prospectus is delivered, upon the written or oral request of such person, a copy
of any or all of the documents incorporated herein by reference (other than
exhibits to such documents unless such exhibits are specifically incorporated by
reference into such documents). Any such request should be directed to James A.
Smallenberger, Senior Vice President and Secretary, AmerUs Life Holdings, Inc.,
699 Walnut Street, Des Moines, Iowa 50309-3948 (telephone number (515)
362-3600).
 
                                        5
<PAGE>   77
 
                                  THE COMPANY
 
GENERAL
 
     The Company is an insurance holding company engaged through its
subsidiaries in the business of marketing, underwriting and distributing a broad
range of individual life insurance and annuity products to individuals and
businesses in 49 states, the District of Columbia and the U.S. Virgin Islands.
The Company's primary product offerings consist of whole life, universal life
and term life insurance policies and fixed annuities. In addition, through a
joint venture (the "Ameritas Joint Venture") with Ameritas Life Insurance Corp.
("Ameritas"), the Company's subsidiary, AmerUs Life Insurance Company ("AmerUs
Life"), markets fixed annuities issued by Ameritas Variable Life Insurance
Company ("AVLIC") and sells AVLIC's variable life insurance and variable annuity
products. As of December 31, 1997, the Company had approximately 573,000 life
insurance policies and annuity contracts outstanding and individual life
insurance in force, net of reinsurance, of approximately $26.7 billion with life
insurance reserves of $2.4 billion and annuity reserves of $6.1 billion. As of
December 31, 1997, the Company had total assets of $10.3 billion and total
shareholders' equity of $928.0 million.
 
     The Company was formed in 1996 as a result of the creation of American
Mutual Holding Company ("AMHC") the first mutual insurance holding company in
the United States. AMHC owns 100% of AmerUs Group Co. ("AmerUs Group"), the
Company's controlling shareholder. The Company's principal subsidiaries are
AmerUs Life, Delta Life Corporation ("Delta") and AmVestors Financial
Corporation ("AmVestors"). AmerUs Life was originally incorporated in 1896 as a
mutual life insurance company.
 
     AmerUs Life's target customers are individuals in the middle and upper
income brackets and small businesses. Its geographic focus is national in scope
(except for Connecticut, Maine, New Hampshire, New York and Vermont, in which
AmerUs Life is not licensed to do business), and it primarily serves suburban
and rural areas. Efforts are currently underway to expand AmerUs Life's
territory into the states of Connecticut, Maine, New Hampshire and Vermont.
AmerUs Life distributes its products primarily through a combination of career
general agency and personal producing general agency ("PPGA") distribution
systems, as well as a network of independent brokers. The career general agency
system consists of a network of 35 career general agencies, with approximately
570 career agents. The PPGA system is comprised of approximately 425 PPGA's, who
have approximately 1,100 agents. As of December 31, 1997, AmerUs Life had
approximately 408,000 life insurance policies and annuity contracts outstanding
and individual life insurance in force, net of reinsurance, of approximately
$26.6 billion. Variable life insurance products and the fixed and variable
annuities offered by the Ameritas Joint Venture are marketed through AmerUs
Life's distribution systems and the distribution systems of Ameritas and AVLIC,
which consist of approximately 160 agents and 540 independent broker-dealers
(with approximately 9,000 registered representatives), respectively.
 
     The Company made two major acquisitions in 1997. The Company acquired Delta
on October 23 for approximately $165 million in cash (the "Delta Acquisition")
and AmVestors on December 19 in a stock exchange valued at approximately $350
million (the "AmVestors Acquisition"). These acquisitions, along with the growth
of AmerUs Life, increased the Company's assets from $4.4 billion at December 31,
1996 to $10.3 billion at December 31, 1997.
 
     The principal asset of Delta is its wholly-owned subsidiary, Delta Life and
Annuity Company ("Delta Life"), an Iowa domiciled life insurance company. Delta
Life is licensed in the District of Columbia and in all states except New York,
and specializes in the sale of individual single and flexible premium deferred
annuities, primarily in the southeastern, western, southwestern and midwestern
regions of the United States. Sales are made primarily through a network of over
3,300 independent agents. Delta Life's strategy is to structure its fixed
annuity products to appeal to the conservative retirement saver who is seeking
principal preservation and consistency of earnings. Most of Delta Life's
products are innovative in that they incorporate a fixed contractual management
fee. Approximately 58% of Delta's 1997 direct collected premiums were derived
from retirement-oriented tax-qualified annuities. As of December 31, 1997, Delta
Life had approximately 52,000 annuity contracts outstanding.
 
                                        6
<PAGE>   78
 
     AmVestors' principal operating subsidiaries are American Investors Life
Insurance Company, Inc. ("American"), a Kansas domiciled life insurance company
licensed in 48 states and the District of Columbia, and Financial Benefit Life
Insurance Company ("FBL"), a Kansas domiciled life insurance company doing
business in 40 states, the District of Columbia and the U.S. Virgin Islands.
AmVestors specializes in the sale of annuity products, further strengthening the
Company's presence in the rapidly growing asset accumulation and retirement and
savings markets. AmVestors utilizes product features intended to enhance the
potential for profit by encouraging persistency and reducing premature
withdrawal during the first five to fourteen years of an annuity contract.
AmVestors distributes its products through a national network of approximately
7,800 licensed independent agents recruited through its wholly-owned
subsidiaries as well as through almost 60 independent marketing organizations.
As of December 31, 1997, AmVestors had approximately 104,000 annuity contracts
outstanding.
 
     The Company's principal executive offices are located at 699 Walnut Street,
Des Moines, Iowa 50309-3948; telephone (515) 362-3600.
 
BUSINESS STRATEGY
 
     The business strategy of the Company is to focus on providing individual
retail consumers in the United States with superior financial services and
products that will meet their financial planning, risk protection, and asset
accumulation needs. Target markets of the Company include individuals in the
middle and upper income brackets and small businesses. Its geographic focus is
national in scope (except for New York, in which the Company is not licensed to
do business), and it primarily serves suburban and rural areas.
 
     The Company seeks to effect this strategy by focusing on life insurance and
asset accumulation products distributed through a variety of distribution
systems. In particular, the Company has developed a very strong position in the
distribution of fixed annuities through independent agents and has a long
established reputation as a provider of whole life insurance products,
distributed through career and PPGA agency distribution systems, that are among
the most attractively priced products to consumers in the industry.
 
     The Company's strategy emphasizes effective management of certain operating
fundamentals -- mortality, expenses, persistency and investment results -- where
the Company's results have historically compared favorably to the industry. The
Company's operating strengths have enabled it to provide attractively priced
products to consumers while also generating profitability for its shareholders.
 
     Growth through a combination of internal growth, mergers and acquisitions
and strategic alliances is a key element of the Company's strategy. In the life
insurance market, the Company presently has less than one half of one percent of
new life insurance sales nationwide, which provides substantial opportunity for
increased growth through improved marketing and sales execution even in a
generally flat business environment.
 
     In the fixed annuity area, the Company is presently a leader in the
distribution of fixed annuities through independent agents. Independent agents
have increased their share of fixed annuity sales in recent years and the
Company's goal is to consistently rank among the top 3 to 5 providers in this
segment.
 
     The Company continues to seek to both deepen and diversify its distribution
channels. Primarily as a result of the acquisitions of AmVestors and Delta, the
Company's distribution channels have grown significantly in recent years. As of
December 31, 1997, the Company had over 15,000 distributors as compared to
approximately 3,700 distributors as of December 31, 1996. While continuing to
expand its existing channels, the Company is in the process of developing
additional bank and major independent marketing organization distribution
channels.
 
CONTROLLING SHAREHOLDER
 
     AMHC is the indirect controlling shareholder of the Company through its
ownership of AmerUs Group. As of March 31, 1998 AmerUs Group owned all 5,000,000
of the outstanding shares of Class B Common Stock and 12,380,300 of the
outstanding shares of Class A Common Stock, representing approximately 50.04% of
the combined voting power of the Class A Common Stock and Class B Common Stock.
AMHC acquired its ownership interest in the Company as a result of the
reorganization, pursuant to which American
                                        7
<PAGE>   79
 
Mutual Life formed AMHC as a mutual insurance holding company and American
Mutual Life was converted into a stock life insurance company as a wholly owned
subsidiary of AMHC (the "Reorganization"). See "Reorganization and Recent
Acquisitions -- Background and Description of the Reorganization."
 
                               THE AMERUS TRUSTS
 
     Each AmerUs Trust is a statutory business trust formed under Delaware law
pursuant to (i) a separate declaration of trust (each a "Trust Agreement")
executed by the Company, as sponsor (the "Sponsor"), and certain trustees of
such trust (the "Issuer Trustees") and (ii) the filing of a certificate of trust
with the Secretary of State of the State of Delaware. Each such declaration of
trust will be amended and restated in its entirety (as so amended and restated,
the "Declaration") substantially in the form filed as an exhibit to the
Registration Statement of which this Prospectus forms a part, as of the date the
Capital Securities of such AmerUs Trust are initially issued. Each Declaration
will be qualified as an indenture under the Trust Indenture Act of 1939, as
amended (the "Trust Indenture Act"). Each AmerUs Trust exists for the exclusive
purposes of (i) issuing and selling the Capital Securities and the Common
Securities representing undivided beneficial interests in the assets of such
AmerUs Trust, (ii) investing the proceeds of the sale of the Capital Securities
and the Common Securities in certain Junior Subordinated Debt (as defined
herein), and (iii) engaging in only those other activities necessary or
incidental thereto.
 
     All of the Common Securities of each AmerUs Trust will be owned directly or
indirectly by the Company. The Common Securities will rank pari passu in right
of payment, and payments will be made thereon pro rata, with the Capital
Securities, except that upon the occurrence and continuance of an Event of
Default under the Declarations (as defined therein) resulting from an Event of
Default (as defined in the Indenture (as defined herein)), the rights of the
Company as holder of the Common Securities to payment in respect of
distributions and payments upon liquidation, redemption or otherwise will be
subordinated to the rights of the holders of the Capital Securities. See
"Description of the Capital Securities of the AmerUs Trusts." The Company will
acquire Common Securities in an aggregate liquidation amount equal to
approximately 3% of the total capital of each AmerUs Trust.
 
     Unless otherwise specified in the applicable Prospectus Supplement, each
AmerUs Trust has a term of approximately 55 years, but may terminate earlier as
provided in its Declaration. The Trust's business and affairs will be conducted
by the Issuer Trustees and Administrators appointed by the Company as the holder
of the Common Securities of each AmerUs Trust. The Issuer Trustees will be First
Union National Bank ("First Union Bank") and First Union Trust Company, National
Association ("First Union Trust"), First Union Bank, as the Property Trustee
(the "Property Trustee"), and First Union Trust, as the Delaware Trustee (the
"Delaware Trustee"), and the Administrators will be three individuals who are
employees of the Company (the "Administrators"). First Union Bank, as the
Property Trustee, will act as sole indenture trustee under the Declaration for
purposes of compliance with the provisions of the Trust Indenture Act. First
Union Bank will also act as indenture trustee (the "Guarantee Trustee") under
the Guarantee and the Indenture, until removed or replaced by the holder of the
Common Securities of each AmerUs Trust. See "Description of Guarantees." The
Company, as the direct or indirect holder of the Common Securities of each
AmerUs Trust, or if an event of default under the Declaration has occurred and
is continuing, the holders of a majority in liquidation amount of the Capital
Securities of each AmerUs Trust, will be entitled to appoint, remove or replace
the Property Trustee and/or the Delaware Trustee. In no event will the holders
of the Capital Securities (or Units) have the right to vote to appoint, remove
or replace the Administrators; such voting rights will be vested exclusively in
the Company, as the direct or indirect holder of the Common Securities of each
AmerUs Trust. The duties and obligations of each Issuer Trustee and
Administrator is governed by such Declaration. Under the Declaration, all
parties to the Declaration will agree, and the holders of the Units upon
purchase of their Units will be deemed to have agreed, for United States Federal
income tax purposes, to treat the Trust as a grantor trust, the Junior
Subordinated Debt as indebtedness and the Capital Securities of each AmerUs
Trust as evidence of indirect beneficial ownership in the Junior Subordinated
Debt. See "Description of the Guarantees" and "Description of the Capital
Securities of the AmerUs Trusts."
 
                                        8
<PAGE>   80
 
     The Property Trustee will hold title to the Junior Subordinated Debt for
the benefit of the holders of the Capital Securities of each AmerUs Trust and
the Property Trustee will have the power to exercise all rights, powers and
privileges under the Indenture as the holder of the Junior Subordinated Debt. In
addition, the Property Trustee will maintain exclusive control of a segregated
non-interest bearing bank account (the "Property Account") to hold all payments
made in respect of the Junior Subordinated Debt for the benefit of the holders
of the Capital Securities of each AmerUs Trust. The Property Trustee will make
payments of distributions and payments on liquidation, redemption and otherwise
to the holders of the Capital Securities of each AmerUs Trust out of funds from
the Property Account. The Guarantee Trustee will hold the Guarantee for the
benefit of the holders of the Capital Securities. See "Description of the
Purchase Contracts and the Units."
 
     The rights of the holders of the Capital Securities, including economic
rights, rights to information and voting rights, are set forth in the
Declaration, the Delaware Business Trust Act and the Trust Indenture Act. See
"Description of the Capital Securities of the AmerUs Trusts." The Company will
pay all fees and expenses related to the AmerUs Trust and the offering of the
Capital Securities and Units and will pay, directly or indirectly, all ongoing
costs, expenses and liabilities of the AmerUs Trusts.
 
     The principal executive office of each AmerUs Trust is located at 699
Walnut Street, Des Moines, Iowa 50309-3948; telephone (515) 362-3600.
 
                                        9
<PAGE>   81
 
                            ORGANIZATIONAL STRUCTURE
 
     The following chart illustrates as of April 15, 1998 the general
organization of AMHC and its subsidiaries, including the Company:
 
                             ORGANIZATIONAL CHART
 
                                       10
<PAGE>   82
 
                        SELECTED CONSOLIDATED FINANCIAL
                               AND OPERATING DATA
 
     The following table sets forth certain financial and operating data of the
Company. The selected consolidated financial data below for each of the five
years ending December 31, 1997 are derived from the Consolidated Financial
Statements of the Company, which financial statements have been audited by KPMG
Peat Marwick LLP, independent auditors. During 1997, the Company acquired Delta
and AmVestors in transactions that were accounted for using the purchase method
of accounting. As a result, the Consolidated Income Statement Data includes the
results of Delta and AmVestors from their respective acquisition dates and the
Consolidated Balance Sheet Data includes year-end data for Delta and AmVestors.
 
<TABLE>
<CAPTION>
                                                                     AS OF OR FOR THE YEAR ENDED
                                                                             DECEMBER 31,
                                                      ----------------------------------------------------------
                                                      1997(A)(B)    1996(B)      1995       1994(C)     1993(C)
                                                      ----------    -------      ----       -------     -------
                                                             (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                                   <C>          <C>         <C>         <C>         <C>
CONSOLIDATED INCOME STATEMENT DATA:
Revenues:
  Insurance premiums................................  $    48.1    $   138.5   $   244.1   $   237.9   $   226.4
  Product charges...................................       43.4         49.3        57.3        56.3        57.4
  Net investment income.............................      224.4        228.7       285.2       275.7       269.9
  Realized gains (losses) on investments............       13.8         66.0        51.4       (19.9)       15.5
  Contribution from the Closed Block................       31.1         19.9          --          --          --
                                                      ---------    ---------   ---------   ---------   ---------
Total revenues......................................      360.8        502.4       638.0       550.0       569.2
                                                      ---------    ---------   ---------   ---------   ---------
Benefits and expenses:
  Total policyowner benefits........................      193.2        261.9       374.6       369.9       364.3
  Total expenses....................................       72.6         95.1       101.1       103.5        96.6
  Dividends to policyowners.........................        1.6         26.3        49.4        45.0        45.5
                                                      ---------    ---------   ---------   ---------   ---------
Total benefits and expenses.........................      267.4        383.3       525.1       518.4       506.4
                                                      ---------    ---------   ---------   ---------   ---------
Income from operations..............................       93.4        119.1       112.9        31.6        62.8
Interest expense....................................       15.0          2.1         2.4         5.5         7.0
                                                      ---------    ---------   ---------   ---------   ---------
Income before income tax expense and equity in
  earnings of unconsolidated subsidiary.............       78.4        117.0       110.5        26.1        55.8
Income tax expense..................................       22.0         43.8        41.2        19.4        21.4
                                                      ---------    ---------   ---------   ---------   ---------
Income before equity in earnings of unconsolidated
  subsidiary........................................       56.4         73.2        69.3         6.7        34.4
Equity in earnings of unconsolidated subsidiary.....        1.7          1.0
Cumulative effect of a change in accounting
  principle, net of tax.............................         --           --          --          --        (3.2)
                                                      ---------    ---------   ---------   ---------   ---------
Net income..........................................  $    58.1    $    74.2   $    69.3   $     6.7   $    31.2
                                                      =========    =========   =========   =========   =========
Earnings per common share
  Basic(D)..........................................  $    2.47    $    3.20   $    2.99   $      --   $      --
  Diluted(E)........................................       2.46         3.20        2.99          --          --
Dividends declared per common share.................       0.30           --          --          --          --
Ratios of earnings to fixed charges(F)(G):..........       2.07         2.73        2.37        1.31        1.62
CONSOLIDATED BALANCE SHEET DATA:
Total invested assets...............................  $ 7,695.5    $ 2,880.8   $ 3,965.0   $ 3,491.7   $ 3,639.3
Total assets........................................   10,254.0      4,384.2     4,371.9     4,036.9     4,030.7
Total liabilities...................................    9,240.0      3,926.7     3,832.0     3,618.6     3,524.8
Company-obligated mandatorily redeemable preferred
  securities........................................       86.0           --          --          --          --
Total stockholders' equity(H).......................      928.0        457.5       539.9       418.3       505.9
OTHER OPERATING DATA:
Adjusted operating income(I)........................  $    49.1    $    37.6   $    38.5   $    27.5   $    24.2
Adjusted operating income per common share (basic
  and diluted)......................................       2.08         1.62        1.66          --          --
Individual life insurance in force, net of
  reinsurance.......................................     26,703       25,725      25,157      25,282      24,698
Annuity account balances(J).........................      6,134        1,363       1,467       1,473       1,410
Number of employees.................................        692          412         406         457         489
STATUTORY DATA:
Premiums and deposits:
  Individual life...................................  $   319.1    $   312.7   $   307.1   $   296.4   $   286.3
  Annuities(J)......................................       75.5         81.4       197.1       187.8        90.4
</TABLE>
 
- -------------------------
(A) Consolidated Income Statement Data includes the results for Delta subsequent
    to October 23, 1997 and the results for AmVestors subsequent to December 19,
    1997, and Consolidated Balance Sheet Data includes year-end data for Delta
    and AmVestors.
 
                                       11
<PAGE>   83
 
(B) The Company formed the Closed Block on June 30, 1996 as a part of the
    Reorganization. Invested assets allocated to the Closed Block are classified
    as Closed Block assets. Revenues and expenses associated with the Closed
    Block are shown net as a single line item. Accordingly, the individual
    income statement components for 1997 are not fully comparable with those of
    1996 and 1995, due to the establishment of the Closed Block on June 30,
    1996. See "Management's Discussion and Analysis of Results of Operations and
    Financial Condition -- Combined Results of Operations."
 
(C) The merger of the two predecessor entities of the Company, which was
    consummated in 1994, has been accounted for as a pooling of interests
    transaction.
 
(D) Retroactively reflects the pro-forma effect of the issuance of 18.16 million
    shares of the Company's Class A Common Stock and 5.0 million shares of
    AmerUs Class B Common Stock at the beginning of 1995. The 1997 calculation
    reflects 18.54 million weighted average shares of Class A Common Stock and 5
    million shares of Class B Common Stock outstanding, respectively.
 
(E) Diluted earnings per common share for 1997 is calculated using 18.57 million
    weighted average shares of Class A Common Stock and 5 million shares of
    Class B Common Stock outstanding.
 
(F) For purposes of computing the ratio of earnings to fixed charges, "earnings"
    consist of income from operations before federal income taxes, fixed charges
    and pre-tax earnings required to cover preferred stock dividend
    requirements. "Fixed charges" consist of interest expense on debt and
    capital securities, amortization of debt expense and interest credited on
    deferred annuities.
 
(G) Since the Company currently has no preferred stock outstanding, the ratio of
    earnings to fixed charges and preferred stock dividends is the same as the
    ratio of earnings to fixed charges.
 
(H) Amounts shown include the effects of reporting fixed maturity securities at
    fair value and recording the unrealized appreciation or depreciation on such
    securities as a component of stockholders' equity, net of tax and other
    adjustments. Such adjustments are in accordance with Statement of Financial
    Accounting Standards 115, "Accounting for Certain Investments in Debt and
    Equity Securities," which the Company adopted December 31, 1993. Amounts
    reported prior to December 31, 1996 reflect policyowners' equity. In
    addition, 1996 stockholder's equity was reduced by a capital contribution
    from the Company to AmerUs Group in the amount of $79 million. Amounts
    reported for the year ended December 31, 1997 include the Delta and
    AmVestors Acquisitions.
 
(I) Adjusted operating income reflects net income adjusted to eliminate certain
    items (net of applicable income taxes) which management believes are not
    necessarily indicative of overall operating trends, including net realized
    gains or losses on investments. Different items are likely to occur in each
    period presented and others may have different opinions as to which items
    may warrant adjustment. The adjusted operating income shown does not
    constitute net income computed in accordance with GAAP. See "Management's
    Discussion and Analysis of Results of Operations and Financial Condition --
    Adjusted Operating Income."
 
(J) Effective May 1996, substantially all individual deferred annuity sales by
    AmerUs Life distribution systems are made through the Ameritas Joint
    Venture. See "Reorganization and Recent Acquisitions -- Ameritas Joint
    Venture."
 
                                       12
<PAGE>   84
 
                                  RISK FACTORS
 
COMPETITIVE ENVIRONMENT
 
     The Company competes with a large number of other insurers and
non-insurance financial service companies, such as banks, broker-dealers and
mutual funds. Many competitors have greater financial resources and offer
alternative products. Other insurers have higher claims-paying ability and
financial strength ratings than the Company. Competition exists for individual
consumers and agents and other distributors of life insurance and annuity
products. Banks, with their pre-existing customer base for financial services
products, may pose increasing competition in the future to life insurers.
 
     Congress is considering changing the laws which regulate banks, insurance
companies and other financial institutions. These changes may permit banks to
own insurance companies and vice versa. None of these proposals has yet been
enacted. It is not possible to predict whether any of these proposals will be
enacted or, if enacted, their potential effect on the Company.
 
     The Company must attract and retain productive agents to sell its life
insurance and annuity products. Strong competition exists among insurance
companies for agents with demonstrated ability. Competition among insurance
companies for such agents is based on the services provided to, and
relationships developed with, these agents in addition to compensation and
product structure.
 
IMPORTANCE OF RATINGS
 
     Ratings with respect to claims-paying ability and financial strength have
become an increasingly important factor in establishing the competitive position
of insurance companies. Each of the rating agencies reviews its ratings
periodically and there can be no assurance that current ratings will be
maintained in the future. Claims-paying and financial strength ratings are based
upon factors relevant to policyowners and are not directed toward protection of
investors in the Company's or an AmerUs Trust's securities.
 
     Future downgrades in the ratings of the Company's life insurance
subsidiaries could significantly affect sales of life insurance and annuity
products and could have a material adverse affect on the results of operations
of the Company. See "Management's Discussion and Analysis of Results of
Operations and Financial Condition."
 
ADVERSE TAX LEGISLATION AND ADMINISTRATIVE PRONOUNCEMENTS
 
     Congress has from time to time considered legislation that would reduce or
eliminate the benefits to policyowners of the deferral of taxation on the
appreciation in value of certain annuities and life insurance products. In 1998,
President Clinton made a budget proposal concerning the taxation of certain
exchanges between annuities, including the reallocation of assets within a
variable annuity. Other proposals affect the taxation of annuities and life
insurance products and insurance companies. A federal tax law enacted in 1997
reduced the rate of taxation on certain long-term capital gains for individuals.
This legislation, along with other possible proposals or administrative
pronouncements, including those relating to the dividends received deduction,
the applicability of the equity add-on tax, and ordinary versus capital gain
treatment for corporations, could adversely affect the taxation of the Company
or the sale of annuities and life insurance products. Similarly, there can be no
certainty as to what, if any, future laws or administrative pronouncements on
these issues might be enacted or promulgated or whether any such laws or
pronouncements would have any adverse effects on the Company.
 
INTEREST RATE FLUCTUATIONS; RISK OF IMPACT OF FORCED LIQUIDATION OF INVESTMENT
PORTFOLIO
 
     Severe interest rate fluctuations could adversely affect the ability of the
Company's life insurance subsidiaries to pay policyowner benefits with operating
and investment cash flows, cash on hand and other cash sources. See
"Management's Discussion and Analysis of Results of Operations and Financial
Condition."
 
     Interest rate fluctuations may also have an impact on policyowner behavior.
If the Company does not maintain competitive interest rates with those credited
in the marketplace, increased policy terminations may
                                       13
<PAGE>   85
 
be experienced. A reduction in interest rates could depress the market for the
Company's fixed annuity products. While policyowners may pay surrender charges
to terminate policies, such terminations would reduce the Company's future
income.
 
     The Company's actual cash flows from investments may differ from those
anticipated at the time of investment. Some of the Company's corporate bond
investments have provisions which could cause the Company to reinvest the
proceeds received at maturity of such investments at lower interest rates if
such bond investments were prepaid prior to their stated maturities. The
Company's collateralized mortgage obligations and other asset-backed securities
are purchased based on assumptions regarding rates of prepayments. If actual
prepayments are earlier or later than anticipated at the time of purchase, the
Company may not receive cash flows when expected or needed. These prepayments
are expected to be influenced by interest rates available for new mortgages as
well as general economic conditions.
 
     Most of the Company's insurance and annuity products provide for guaranteed
minimum yields. Accordingly, a significant drop in market rates of interest
could have a material impact on the Company's future results of operations.
 
HOLDING COMPANY STRUCTURE; LIMITATIONS ON DIVIDENDS
 
     The Company is an insurance holding company whose assets consist primarily
of all of the outstanding stock of AmerUs Life, Delta and AmVestors. The
Company's ongoing ability to pay dividends to its shareholders and meet its
other obligations, including its obligations in respect of the Securities on
which it is an obligor, depends primarily upon receipt of sufficient funds from
its subsidiaries in the form of dividends or interest payments.
 
     The payment of dividends to the Company by its insurance subsidiaries is
regulated under state insurance laws. Under Iowa law, AmerUs Life and Delta Life
may pay dividends only from the earned surplus arising from their respective
businesses. Each must receive the prior approval of the Iowa Commissioner to pay
a dividend if such dividend would exceed certain statutory limitations. Based on
these limitations and 1997 results, AmerUs Life could pay approximately $58
million in dividends in 1998 and Delta Life could pay approximately $8 million
in dividends in 1998 without obtaining the Iowa Commissioner's approval. The
payment of dividends by AmVestors' insurance subsidiaries is regulated under
Kansas law. Kansas has statutory limitations similar to those of Iowa. Based
upon these limitations and 1997 results, AmVestors' insurance subsidiaries could
pay approximately $15 million in dividends in 1998 without obtaining prior
regulatory approval. In February 1998 AmerUs Life paid the Company $5 million in
dividends. Based upon the cumulative limitations and 1997 results, the Company's
insurance subsidiaries could pay an additional $75 million in dividends in 1998
without obtaining regulatory approval. If AmerUs Life, Delta or AmVestors cannot
pay dividends or interest to the Company in the future, it could have a material
adverse effect on the Company and the market value of the Securities. See
"Management's Discussion and Analysis of Results of Operations and Financial
Condition -- Liquidity and Capital Resources."
 
     Under the terms of its existing credit agreement with its banks, the
Company is prohibited from paying cash dividends on the Company's capital stock
in excess of an amount equal to 3% of the Company's consolidated net worth as of
the last day of the preceding fiscal year. Accordingly, the Company would be
permitted by its existing credit agreement to pay a cash dividend up to
approximately $28 million in 1998. The Company has also pledged to the banks
which are party to the Credit Agreement (as defined herein) approximately 49.9%
of the outstanding common stock of AmerUs Life owned by the Company, 100% of the
outstanding common stock of Delta and a $50 million 9% note payable to the
Company by AmerUs Life.
 
     In connection with the 8.85% Capital Securities, Series A (the "Series A
Capital Securities"), issued in February, 1997 by AmerUs Capital I, the
Company's subsidiary trust, the Company has agreed not to declare or pay any
dividends on the Company's capital stock, including the Class A Common Stock,
during any period of time in which dividends on such Capital Securities are
suspended, except for stock dividends. Other
 
                                       14
<PAGE>   86
 
dividends in respect of the Company's capital stock cannot be paid until all
accrued dividends on the Series A Capital Securities have been paid.
 
CONTROL BY AMHC; ANTI-TAKEOVER EFFECTS OF IOWA LAW AND THE COMPANY'S ARTICLES OF
INCORPORATION AND BY-LAWS
 
     Under Iowa law and the Company's Amended and Restated Articles of
Incorporation (the "Articles of Incorporation"), AMHC, as a mutual insurance
holding company, is required to own, directly or indirectly, shares of capital
stock of AmerUs Life which carry the right to cast a majority of the votes
entitled to be cast by all of the outstanding shares of AmerUs Life's capital
stock. Consequently, AMHC may, without the approval of the other shareholders of
the Company, elect all of the directors of the Company and approve matters
submitted for shareholder approval. In addition, unless AMHC is demutualized, an
action beyond the Company's control, the Company cannot be the subject of a
successful takeover bid. Certain provisions in the Company's Articles of
Incorporation and By-laws may delay, defer or prevent a takeover attempt that a
shareholder might consider in his or her best interests. These provisions
include supermajority voting rights for the Company's Class B common stock no
par value (the "Class B Common Stock"), the ability of the board of directors to
issue so-called "blank check" preferred stock and a classified board of
directors. Such provisions may adversely affect the prevailing market price of
the Class A Common Stock. See "Description of Capital Stock -- Certain
Provisions of the Articles of Incorporation and the By-laws of the Company."
 
RELATIONSHIP WITH AMHC; POTENTIAL CONFLICTS OF INTEREST
 
     AMHC is a mutual insurance holding company which is operated for the
benefit of its members. The members of AMHC are policyowners of AmerUs Life.
AMHC (or certain of its wholly-owned subsidiaries) have entered into agreements
with the Company and/or AmerUs Life in which the Company and/or AmerUs Life will
provide to such subsidiaries or affiliates certain management, data processing,
legal and other services, or such subsidiaries or affiliates will provide
services to the Company and/or AmerUs Life. The Company's management believes
the terms of such agreements are fair and reasonable. However, none of these
contracts were the result of arms' length negotiations between independent
parties. These agreements may be modified in the future. Additional agreements
or transactions may be entered into between AMHC or subsidiaries of AMHC and the
Company and its subsidiaries.
 
     As a result of these arrangements, there may be a number of potential
conflicts of interest between the Company and AMHC. In an effort to address such
potential conflicts, regulations of the Iowa Commissioner require the Company to
have three outside directors who are not directors of AMHC. Currently, the
Company has four outside directors who are not directors of AMHC or any of
AMHC's subsidiaries. These outside directors comprise the Company's Intercompany
Transactions Committee which reviews intercompany transactions involving
potential conflicting interests. However, there can be no assurance that
decisions made by AMHC will not adversely affect the Company.
 
     The National Association of Insurance Commissioners has formed a working
group to review mutual insurance holding company legislation and regulations.
The working group's review could address, among other things, potential
restrictions on stock ownership by directors and officers, the utilization of
non-voting or low voting stock, standards for affiliate transactions, and
regulation of potential conflicts of interests. It is unclear what effect, if
any, this review would have, but it is possible that insurance regulators,
including Iowa, could propose additional laws or regulations which would affect
or inhibit transactions between affiliates, future stock issuances, the ability
of officers and directors to secure significant ownership positions in the
Company or otherwise restrict the ability of the Company to take advantage of
new business opportunities.
 
RESTRICTIONS ON RATIO OF THE COMPANY'S STOCK CLASSES
 
     The Company's Articles of Incorporation provide that the number of
outstanding shares of Class A Common Stock (excluding shares of Common Stock
owned by AMHC or another Permitted Class B Holder (as defined herein)) shall
exceed the number of outstanding shares of the Company's Class B common stock
plus the shares of Class A Common Stock beneficially owned by AMHC or another
Permitted Class B Holder
 
                                       15
<PAGE>   87
 
only as authorized by law and not by a ratio of more than three to one. As a
result, the Company's ability to issue additional shares of Class A Common Stock
for any reason, including raising additional equity capital, for stock options
or in connection with acquisitions may be restricted if such condition should
occur. As of March 1, 1998, the ratio was approximately 1:1.
 
UNCERTAINTIES IN INTEGRATING OPERATIONS AND ACHIEVING COST SAVINGS
 
     As a result of the acquisitions of Delta and AmVestors, the Company has
substantially increased in size. While the Company has integrated the investment
operations of both AmVestors and Delta with those of AmerUs Life, there can be
no assurance as to the cost savings and efficiencies that will be achieved. The
success of the acquisition of Delta depends in part on the ability of the
Company to combine operations, integrate departments, systems and procedures and
obtain cost savings from these acquisitions. While the operations of Delta have
been integrated with those of AmerUs Life, and certain integration steps have
been taken with respect to AmVestors, there can be no assurance as to the cost
savings and efficiencies that will be achieved. See "Business -- Integration of
Recently Acquired Subsidiaries."
 
FUTURE POLICY BENEFITS EXPOSURE
 
     The liability established by the Company for future life insurance and
annuity policy benefits is based upon assumptions concerning a number of
factors. Such factors include interest rates, mortality, duration of the
policies and expenses. Actual experience will likely differ from assumed
experience. If the Company's provision for future policy benefits proves
inadequate, future earnings will be adversely affected.
 
REGULATORY AND RELATED RISKS
 
     The Company's life insurance subsidiaries are subject to regulation by
state regulators under the insurance laws of states in which they conduct
business. The Company, AmerUs Group, AMHC, AmerUs Life and Delta Life are
regulated by the Iowa Insurance Division. Both the Iowa and Kansas Departments
regulate transactions with affiliates. In addition, AmVestors and its
subsidiaries are regulated by the Kansas Department of Insurance. The purpose of
such regulation is primarily to provide safeguards for policyowners rather than
to protect the interests of shareholders. The insurance laws of the various
states establish regulatory agencies with broad administrative powers including
the authority to grant or revoke operating licenses and to regulate sales
practices, investments, deposits of securities, the form and content of
financial statements and insurance policies, accounting practices and the
maintenance of specified reserves and capital. In addition, the Iowa
Commissioner of Insurance has adopted rules regulating the issuance of stock by
the Company in equity offerings and the issuance of convertible securities.
 
     Insurance regulators have in recent years investigated allegations of
improper sales practices by insurance agents, including churning and misleading
sales presentations. The National Association of Insurance Commissioners has
adopted a model law and regulation which would standardize the form and content
of any illustrations provided to prospective purchasers of individual life
insurance products. The model law has been enacted in a number of states. The
Company expects that similar laws will eventually be enacted in additional
states in which its subsidiaries sell individual life insurance products. There
can be no assurance as to whether any such changes will have a material adverse
impact on sales of such products by the industry as a whole or by the Company.
 
     Certain of the Company's insurance and annuity products are innovative and
relatively new. The Company is operating within a new regulatory framework as a
subsidiary of a mutual holding company which, in turn, has a converted stock
insurer as a subsidiary. The regulatory framework at the state and federal level
applicable to insurance and annuity products and the mutual holding company
structure is evolving. The changing regulatory framework could affect the design
or profitability of such products and the Company's ability to sell certain
products. For example, in August 1997, the SEC requested information and
comments about the structure of equity index insurance products, the manner in
which they are marketed and the federal securities law issues raised by equity
index insurance products. It is possible that the SEC may propose new
 
                                       16
<PAGE>   88
 
regulations or policies with respect to equity index insurance products which
may affect the marketing of such products or impose requirements that some or
all such products be registered with the SEC.
 
RISKS OF CLASS ACTION LITIGATION
 
     In recent years, a number of life insurance companies, including AmerUs
Life, have been named defendants in class action lawsuits arising out of their
business practices. AmerUs Life recently settled one such class action lawsuit,
although the exact amount of such settlement is yet to be determined. Although
AmerUs Life has denied all allegations against it and has vigorously defended
against the remaining class action lawsuit which has been brought against AmerUs
Life, there can be no assurance that such litigation, or similar litigation
filed in the future, will not have a material adverse affect on the life
insurance industry generally or on the Company. See "Management's Discussion and
Analysis of Results of Operations and Financial Condition."
 
RISKS RELATING TO THE CLOSED BLOCK
 
     In connection with the Reorganization, AmerUs Life was required to allocate
specific assets for the benefit of insurance policies and annuities existing at
the time of the Reorganization that pay dividends or provide interest credits.
This is known as a "Closed Block." The Closed Block is designed to provide
reasonable assurance to owners of policies included therein that, after the
Reorganization, assets would be available to maintain the dividend scales and
interest credits in effect prior to the Reorganization if the experience
underlying such scales and credits continues. The investment performance of the
assets in the Closed Block and the performance of the policies covered by the
Closed Block will affect future dividends and interest credits. Any excess of
cumulative favorable experience for Closed Block policies over unfavorable
experience will be available for distribution over time to Closed Block
policyowners and will not be available to AmerUs Life or the Company. Unless the
Iowa Commissioner consents to an earlier termination, the Closed Block will
continue to be in effect until the date on which none of the policies in the
Closed Block remains in force.
 
     The Company will continue to pay guaranteed benefits under all policies,
including the policies included in the Closed Block, in accordance with their
terms. If the assets allocated to the Closed Block, the investment cash flows
from those assets and the revenues from the policies included in the Closed
Block including investment income thereon prove to be insufficient to pay the
benefits guaranteed under the policies included in the Closed Block, the Company
will be required to make such payments from its general funds. The Company bears
the costs of operating and managing the Closed Block and, accordingly, such
costs were not funded as part of the assets allocated to the Closed Block. Any
increase in such costs in the future would be borne by the Company. See
"Reorganization and Recent Acquisitions -- The Reorganization -- Establishment
and Operation of the Closed Block."
 
RISKS RELATING TO YEAR 2000 COMPLIANCE
 
     As the year 2000 approaches, an important business issue has emerged
regarding how existing application software programs and operating systems can
accommodate the date value "2000." Many existing application software products
were designed to only accommodate a two digit date position which represents the
year (e.g., the number "95" is stored on the system and represents the year
1995). As a result, the year 1999 (i.e., "99") is the maximum date value many
systems will be able to accurately process. The Company formed a year 2000
working group to address potential problems posed by this development to assure
that the Company is prepared for year 2000. Total estimated costs are in a range
of $4 to $6 million with approximately $3 million to be incurred in 1998.
However, if modifications and conversions to deal with year 2000 issues are not
completed on a timely basis or are not fully effective, such issues may have a
material adverse effect on the operations of the Company. All costs associated
with year 2000 modifications and conversions will be expensed as incurred. See
"Management's Discussion and Analysis of Results of Operations and Financial
Condition -- Year 2000 Compliance."
 
                                       17
<PAGE>   89
 
CLASS A COMMON STOCK ELIGIBLE FOR FUTURE SALE
 
     Sales of substantial amounts of Class A Common Stock (including shares of
the Company's Class B common stock converted into Class A Common Stock), or the
perception that such sales could occur, could have an adverse effect on the
price of the Class A Common Stock. As of December 31, 1997, AMHC beneficially
owned 12,380,300 shares of Class A Common Stock. All of the shares of Class A
Common Stock which are currently beneficially owned by AMHC are eligible for
sale under SEC rules, subject to certain volume and timing limitations and
restrictions imposed on AMHC, as a mutual holding company, by Iowa law.
 
                                USE OF PROCEEDS
 
     Unless otherwise indicated in the accompanying Prospectus Supplement, the
net proceeds received by the Company from the sale of the Securities offered
hereby are expected to be used for general corporate purposes. The proceeds from
the sale of Capital Securities by the AmerUs Trusts will be invested in the
Junior Subordinated Debt of the Company. Except as may otherwise be described in
the Prospectus Supplement relating to such Capital Securities, the Company
expects to use the net proceeds from the sale of such Junior Subordinated Debt
to the AmerUs Trusts for general corporate purposes. Any specific allocation of
the proceeds to a particular purpose that has been made at the date of any
Prospectus Supplement will be described therein.
 
                                       18
<PAGE>   90
 
                     REORGANIZATION AND RECENT ACQUISITIONS
 
THE REORGANIZATION
 
     BACKGROUND AND DESCRIPTION OF THE REORGANIZATION
 
     On October 27, 1995, the Board of Directors of American Mutual Life adopted
the plan of reorganization (the "AmerUs Reorganization Plan"), pursuant to which
AMHC was formed as a mutual insurance holding company and American Mutual Life
was converted into a stock life insurance company and its name was changed to
AmerUs Life Insurance Company.
 
     As part of the Reorganization, all of the shares of capital stock of AmerUs
Life were issued to AMHC. Subsequently, AMHC contributed all of its shares of
capital stock of AmerUs Life to AmerUs Group, which contributed such shares to
the Company, AmerUs Group's then wholly-owned subsidiary. Under this structure,
the Company is an intermediate holding company, with AmerUs Group as its direct
controlling shareholder and AmerUs Life as its wholly-owned subsidiary. Under
Iowa law, AMHC is required to retain direct or indirect ownership and control of
shares which carry the right to cast a majority of the votes entitled to be cast
by holders of the outstanding capital stock of AmerUs Life.
 
     Iowa legislation permits AMHC to demutualize, a process which would cause
AMHC to convert from mutual to stock form and become publicly owned by
shareholders. Pursuant to the Company's Articles of Incorporation, upon a
demutualization of AMHC, all of the Company's shares of outstanding Class B
Common Stock will automatically convert into shares of Class A Common Stock. See
"Description of Capital Stock." AMHC has advised the Company that AMHC has no
present plans to demutualize.
 
     ESTABLISHMENT AND OPERATION OF THE CLOSED BLOCK
 
     In connection with the Reorganization, the Closed Block was established.
Insurance policies which had a dividend scale in effect as of June 30, 1996 were
included in the Closed Block. The Closed Block was designed to provide
reasonable assurance to policyowners included therein that, after the
Reorganization, assets will be available to maintain the dividend scales and
interest credits in effect prior to the Reorganization if the experience
underlying such scales and credits continues. The establishment of the Closed
Block did not alter, diminish, reduce or in any other way adversely affect these
policyowners' contractual rights.
 
     Pursuant to the AmerUs Reorganization Plan, assets were allocated to the
Closed Block at June 30, 1996 in an amount which the Company expects to produce
cash flows which, together with anticipated revenues from the policies in the
Closed Block, are expected to be sufficient to support the Closed Block
business, including provision for payment of claims, taxes and certain other
expenses and for the continuation of dividend scales and interest credits in
effect prior to the Reorganization if the experience underlying such scales and
credits continues or for appropriate adjustments in such scales and credits if
the experience changes. The assets, including the revenue therefrom, allocated
to the Closed Block will accrue solely to the benefit of policyowners included
in the Closed Block business until such time as the Closed Block is no longer in
effect. To the extent that over time cash flows from the assets allocated to the
Closed Block and other experience relating to the Closed Block are, in the
aggregate, more or less favorable than assumed in establishing the Closed Block,
total dividends and interest credits paid to Closed Block policyowners in the
future may be greater than or less than the total dividends and interest credits
that would have been paid to these policyowners if the dividend scales and
interest credits in effect prior to the Reorganization had been continued.
Dividends and interest credits on policies included in the Closed Block, as in
the past, will be declared at the discretion of AmerUs Life's Board of Directors
and may vary from time to time (reflecting changes in investment, mortality,
persistency and other experience factors).
 
     AmerUs Life will continue to pay guaranteed benefits under all policies,
including the policies included in the Closed Block, in accordance with their
terms. If the assets allocated to the Closed Block, the investment cash flows
from those assets and the revenues from the policies included in the Closed
Block, including investment income thereon, prove to be insufficient to pay the
benefits guaranteed under the policies included in the Closed Block, AmerUs Life
will be required to make such payments from its general funds. AmerUs Life bears
the costs of operating and managing the Closed Block and, accordingly, such
costs were not funded
                                       19
<PAGE>   91
 
as part of the assets allocated to the Closed Block. Any increase in such costs
in the future would be borne by AmerUs Life.
 
     The Closed Block will continue in effect until either (i) the last policy
in the Closed Block is no longer in force or (ii) the Closed Block is dissolved.
The AmerUs Reorganization Plan provides that the Closed Block may not be
dissolved without the approval of the Iowa Commissioner, which approval could
only be obtained if dissolution were demonstrated not to be adverse to the
interests of the policyowners whose policies make up the Closed Block. If the
Closed Block is dissolved, the assets associated with the Closed Block will
become part of AmerUs Life's general funds. If the Closed Block is not
dissolved, the expected life of the Closed Block is in excess of 75 years.
 
     At December 31, 1997, the Closed Block had assets of $1,391.8 million and
liabilities of $1,623.4 million. The excess of Closed Block Liabilities over
Closed Block Assets represents the expected future after-tax contributions
(before certain other expense charges, which were not funded in the Closed
Block) from the Closed Block which may be recognized in income over the period
the policies in the Closed Block remain in force.
 
     If the actual contribution from the Closed Block in any given period equals
or exceeds the expected contribution for such period as determined at the
establishment of the Closed Block, only the expected contribution would be
recognized in income from continuing operations for that period. Any excess of
the actual contribution over the expected contribution is recognized in income
from continuing operations to the extent that the aggregate expected
contribution for all prior periods exceeded the aggregate actual contribution.
Any remaining excess of actual contribution over expected contributions would be
accrued in the Closed Block as a liability for future policyowners' dividends.
This accrual for future dividends effectively limits the actual Closed Block
contribution recognized in income from continuing operations to the Closed Block
contribution expected to emerge from operation of the Closed Block as determined
as of the date of establishment of the Closed Block.
 
     If the actual contribution from the Closed Block in any given period is
less than the expected contribution for that period, because changes in
dividends scales are inadequate to offset the negative performance in relation
to the expected performance, the contribution inuring to shareholders of AmerUs
Life will be reduced. If a liability for policyowners' dividends had been
previously established in the Closed Block because the actual contribution to
the relevant date had exceeded the expected contribution to such date, such
liability would be reduced (but not below zero) in any periods in which the
actual contribution for that period is less than the expected contribution for
such period.
 
ACQUISITION OF DELTA LIFE CORPORATION
 
     On October 23, 1997, the Company acquired all of the outstanding capital
stock of Delta for approximately $165 million in cash. The principal asset of
Delta is its wholly-owned subsidiary, Delta Life, a Tennessee-domiciled life
insurance company and, following its acquisition by the Company, redomiciled to
Iowa in 1998. Delta Life is licensed in the District of Columbia and in all
states except New York, and specializes in the sale of individual single and
flexible premium deferred annuities, primarily in the southeastern, western,
southwestern and midwestern regions of the United States. Sales are made
primarily through a network of over 3,300 independent agents. Approximately 58%
of Delta Life's 1997 direct collected premiums were derived from
retirement-oriented tax-qualified annuities. As of December 31, 1997, Delta Life
had approximately 52,000 annuity contracts outstanding.
 
     Delta Life's strategy is to structure its fixed annuity products to appeal
to the conservative retirement saver who is seeking principal preservation and
consistency of earnings. Most of Delta Life's products are innovative in that
they incorporate a fixed contractual management fee. In addition to offering a
lifetime guaranteed minimum interest crediting rate and an annual guaranteed
interest crediting rate, these annuities also require the crediting of the
interest rate earned on the assets supporting the respective policies after
deducting the contractual management fee. Over 70% of policyowners' assets are
invested in securities issued, secured or guaranteed by the U.S. Government,
government agencies or government instrumentalities.
 
                                       20
<PAGE>   92
 
     The Delta Acquisition increased the Company's presence in the rapidly
growing asset accumulation business, significantly expanded the Company's
distribution capacity, provided the Company access to Delta's extensive
marketing capabilities, expanded the Company's presence in the south and
southeast and expanded the Company's offering of competitive products that meet
the demands of consumers. By integrating the operations of Delta Life with those
of AmerUs Life, the Company substantially reduced the unit costs of both AmerUs
Life's and Delta Life's general insurance expenses and investment expenses by
spreading fixed costs over a larger revenue base. The Delta Acquisition also
increased and diversified the Company's distribution channels.
 
ACQUISITION OF AMVESTORS FINANCIAL CORPORATION
 
     On December 19, 1997 the Company acquired AmVestors in a stock exchange
valued at approximately $350 million. AmVestors' principal operating
subsidiaries are American, a Kansas domiciled life insurance company licensed in
48 states and the District of Columbia and FBL, a Kansas domiciled life
insurance company doing business in 40 states, the District of Columbia and the
U.S. Virgin Islands. AmVestors distributes its products through a national
network of approximately 7,800 licensed independent agents. As of December 31,
1997, AmVestors had approximately 104,000 annuity contracts outstanding.
 
     AmVestors specializes in the sale of annuity products, further
strengthening the Company's presence in the rapidly growing asset accumulation
and retirement savings markets. AmVestors' strategy is to focus on the dynamics
of the growing retirement market and the need for easily-administered, low-risk
annuities. AmVestors continually enhances its products based on market
conditions. The time frame for new product releases is generally less than two
months from conceptualization to rollout. Outstanding service to its
policyholders, including easy-to-read statements; quick delivery of policies and
turnaround on customer service calls; 24-hour-a-day product and customer
information availability and systematic withdrawal represent other areas of
strategic focus of AmVestors.
 
                                       21
<PAGE>   93
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 RESULTS OF OPERATIONS AND FINANCIAL CONDITION
 
     The following analysis of the consolidated results of operations and
financial condition of the Company should be read in conjunction with the
Selected Consolidated Financial and Operating Data and the Consolidated
Financial Statements of the Company and related notes included elsewhere or
incorporated by reference in this Prospectus.
 
OVERVIEW
 
     The Company is a holding company engaged through its subsidiaries in the
business of marketing, underwriting and distributing a broad range of individual
life insurance and annuity products to individuals and businesses in 49 states,
the District of Columbia and the U.S. Virgin Islands. The Company's primary
product offerings consist of whole life, universal life and term life insurance
policies and fixed annuities. Since April 1, 1996 the Company has been a party
to the Ameritas Joint Venture with Ameritas, through which it markets fixed
annuities and sells variable annuities and variable life insurance products. See
"Business -- Products."
 
     In accordance with GAAP, universal life insurance premiums and annuity
deposits received are reflected as increases in liabilities for policyowner
account balances and not as revenues. Revenues reported for universal life and
annuity products consist of policy charges for the cost of insurance,
administration charges and surrender charges assessed against policyowner
account balances. Surrender benefits paid relating to universal life insurance
policies and annuity products are reflected as decreases in liabilities for
policyowner account balances and not as expenses. Amounts for interest credited
to universal life and annuity policyowner account balances and benefit claims in
excess of policyowner account balances are reported as expenses in the financial
statements. The Company receives investment income earned from the funds
deposited into account balances by universal life and annuity policyowners, the
majority of which is passed through to such policyowners in the form of interest
credited.
 
     Premium revenues reported for traditional life insurance products are
recognized as revenues when due. Future policy benefits and policy acquisition
costs are recognized as expenses over the life of the policy by means of a
provision for future policy benefits and amortization of deferred policy
acquisition costs.
 
     The costs related to acquiring new business, including certain costs of
issuing policies and certain other variable selling expenses (principally
commissions), defined as deferred policy acquisition costs, are capitalized and
amortized as an expense primarily in proportion to expected profits or margins
from such policies. This amortization is adjusted when current or estimated
future gross profits or margins on the underlying policies vary from previous
estimates. For example, the amortization of deferred policy acquisition costs is
accelerated when policy terminations are higher than originally estimated or
when investments supporting the policies are sold at a gain prior to their
anticipated maturity. Death and other policyowner benefits reflect exposure to
mortality risk and fluctuate from period to period based on the level of claims
incurred within insurance retention limits. The profitability of the Company is
primarily affected by expense levels, interest spread results (i.e., the excess
of investment earnings over the interest credited to policyowners) and
fluctuations in mortality, persistency and other policyowner benefits. The
Company has the ability to mitigate adverse experience through adjustments to
credited interest rates, policyowner dividends or cost of insurance charges.
 
ADJUSTED OPERATING INCOME
 
     The following table reflects net income adjusted to eliminate certain items
(net of applicable income taxes) which management believes are not necessarily
indicative of overall operating trends, including net realized gains or losses
on investments. Different items are likely to occur in each period presented and
others
 
                                       22
<PAGE>   94
 
may have different opinions as to which items may warrant adjustment. The
adjusted operating income shown below does not constitute net income computed in
accordance with GAAP.
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                ------------------------------------------------------
                                                 1997        1996        1995       1994        1993
                                                 ----        ----        ----       ----        ----
                                                       (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                             <C>        <C>         <C>         <C>        <C>
Net income..................................    $58,059    $ 74,173    $ 69,348    $ 6,667    $ 31,209
Net realized (gains) losses on
  investments(A)............................     (9,008)    (42,552)    (32,244)    11,223     (10,187)
Equity add-on tax(B)........................         --       4,480          --      9,585          --
Reorganization costs(C).....................         --       1,522       1,426         --          --
Adoption of SFAS 106(D).....................         --          --          --         --       3,214
                                                -------    --------    --------    -------    --------
Adjusted operating income...................    $49,051    $ 37,623    $ 38,530    $27,475    $ 24,236
                                                =======    ========    ========    =======    ========
Adjusted operating income per common
  share.....................................      $2.08       $1.62       $1.66         --          --
</TABLE>
 
- -------------------------
(A) Represents realized gains or losses on investments less that portion of the
    amortization of deferred policy acquisition costs adjusted for income taxes
    on such amounts. Realized gains may vary widely between periods. Such
    amounts are determined by management's timing of individual transactions and
    do not necessarily correspond to the underlying operating trends.
 
(B) Represents the mutual life insurance company equity add-on tax, which is
    applicable only to mutual life insurance companies and which the Company
    believes is not applicable to the Company after June 30, 1996 due to AmerUs
    Life's conversion into a stock company.
 
(C) Represents costs directly related to the Reorganization consisting primarily
    of printing, postage, legal and consulting costs adjusted for income taxes
    on such amounts. These costs were not of a continuing nature and were not
    expected to have any effect on future operations.
 
(D) As of January 1, 1993, the Company adopted SFAS 106, pursuant to which the
    cost of certain post-retirement benefits must be recognized on an accrual
    basis as employees perform services to earn such benefits. The Company's
    transition obligation as of January 1, 1993 amounted to approximately $3.2
    million, net of income tax benefits, and was recorded as a cumulative effect
    adjustment to net income.
 
RECENT ACQUISITIONS
 
     The Company acquired all of the outstanding stock of Delta on October 23,
1997, for approximately $165 million in cash. The transaction was accounted for
as a purchase and accordingly, the Company's results of operations include Delta
from the date of purchase. The Company acquired all of the outstanding stock of
AmVestors on December 19, 1997, in a stock exchange valued at approximately $350
million. This transaction was also accounted for as a purchase and the Company's
results of operations include AmVestors from the date of purchase. See
"Reorganization and Recent Acquisitions -- Acquisition of Delta Life Corporation
and -- Acquisition of AmVestors Financial Corporation".
 
THE CLOSED BLOCK
 
     The Closed Block was established on June 30, 1996. Insurance policies which
had a dividend scale in effect as of June 30, 1996 were included in the Closed
Block. The Closed Block was designed to provide reasonable assurance to owners
of insurance policies included therein that, after the Reorganization, assets
would be available to maintain the dividend scales and interest credits in
effect prior to the Reorganization if the experience underlying such scales and
credits continues. See "Risk Factors -- Risks Relating to the Closed Block" and
"Reorganization and Recent Acquisitions -- Establishment and Operation of the
Closed Block".
 
     The contribution to the operating income of the Company from the Closed
Block is reported as a single line item in the income statement. Accordingly,
premiums, product charges, investment income, realized gains (losses) on
investments, policyowner benefits and dividends attributable to the Closed
Block, less certain
 
                                       23
<PAGE>   95
 
minor expenses including amortization of deferred policy acquisition costs, are
shown as a net number under the caption the "Contribution from the Closed
Block." This results in material reductions in the respective line items in the
income statement while having no effect on net income. The expenses associated
with the administration of the policies included in the Closed Block and the
renewal commissions on these policies are not charged against the Contribution
from the Closed Block, but rather are grouped with underwriting, acquisition and
insurance expenses. Also, all assets allocated to the Closed Block are grouped
together and shown as a separate item entitled "Closed Block Assets." Likewise,
all liabilities attributable to the Closed Block are combined and disclosed as
the "Closed Block Liabilities."
 
COMBINED RESULTS OF OPERATIONS
 
     Since the operating results from the Closed Block are reported on one line
of the income statement, "Contribution from the Closed Block," individual income
statement components are not fully comparable with those prior to the
establishment of the Closed Block. Management believes that the presentation of
the results of operations for 1997 on a combined basis as if the Closed Block
had not been formed facilitates comparability with the results of operations for
1996 prior to the formation of the Closed Block and for 1995. Accordingly, the
combined presentation set forth below includes certain revenues and expenses
associated with policies included in the Closed Block. Such presentation does
not, however, affect the Company's reported net income.
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31, 1997
                                                                --------------------------------
                                                                   AS        CLOSED
                                                                REPORTED     BLOCK      COMBINED
                                                                --------     ------     --------
                                                                         (IN THOUSANDS)
<S>                                                             <C>         <C>         <C>
Revenues
  Insurance premiums........................................    $ 48,127    $206,145    $254,272
  Product charges...........................................      43,441      17,464      60,905
  Net investment income.....................................     224,431     113,759     338,190
  Realized gains on investments.............................      13,791         718      14,509
  Contribution from the Closed Block........................      31,045     (31,045)         --
                                                                --------    --------    --------
       Total revenues.......................................     360,835     307,041     667,876
Benefits and expenses
  Policyowner benefits......................................     193,237     209,377     402,614
  Underwriting, acquisition and insurance expenses..........      51,663       6,603      58,266
  Amortization of deferred policy acquisition costs.........      20,987      31,470      52,457
  Dividends to policyowners.................................       1,587      59,591      61,178
                                                                --------    --------    --------
       Total benefits and expenses..........................     267,474     307,041     574,515
Income from operations......................................      93,361          --      93,361
Interest expense............................................      14,980          --      14,980
                                                                --------    --------    --------
Income before income tax expense and equity in earnings of
  unconsolidated subsidiary.................................      78,381          --      78,381
Income tax expense..........................................      22,022          --      22,022
                                                                --------    --------    --------
Income before equity in earnings of unconsolidated
  subsidiary................................................      56,359          --      56,359
Equity in earnings of unconsolidated subsidiary.............       1,700          --       1,700
                                                                --------    --------    --------
       Net income...........................................    $ 58,059    $     --    $ 58,059
                                                                ========    ========    ========
</TABLE>
 
                                       24
<PAGE>   96
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31, 1996
                                                                --------------------------------
                                                                   AS        CLOSED
                                                                REPORTED     BLOCK      COMBINED
                                                                --------     ------     --------
                                                                         (IN THOUSANDS)
<S>                                                             <C>         <C>         <C>
Revenues
  Insurance premiums........................................    $138,476    $108,315    $246,791
  Product charges...........................................      49,347       9,324      58,671
  Net investment income.....................................     228,625      56,329     284,954
  Realized gains on investments.............................      65,983         481      66,464
  Contribution from the Closed Block........................      19,909     (19,909)         --
                                                                --------    --------    --------
       Total revenues.......................................     502,340     154,540     656,880
Benefits and expenses
  Policyowner benefits......................................     261,869     103,951     365,820
  Underwriting, acquisition and insurance expenses..........      54,857       2,969      57,826
  Amortization of deferred policy acquisition costs.........      40,160      18,412      58,572
  Dividends to policyowners.................................      26,324      29,208      55,532
                                                                --------    --------    --------
       Total benefits and expenses..........................     383,210     154,540     537,750
Income from operations......................................     119,130          --     119,130
Interest expense............................................       2,142          --       2,142
                                                                --------    --------    --------
Income before income tax expense and equity in earnings of
  unconsolidated subsidiary.................................     116,988          --     116,988
Income tax expense..........................................      43,859          --      43,859
                                                                --------    --------    --------
Income before equity in earnings of unconsolidated
  subsidiary................................................      73,129          --      73,129
Equity in earnings of unconsolidated subsidiary.............       1,044          --       1,044
                                                                --------    --------    --------
       Net income...........................................    $ 74,173    $     --    $ 74,173
                                                                ========    ========    ========
</TABLE>
 
     1997 COMPARED TO 1996
 
     A summary of the Company's combined revenues, including revenues associated
with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                             --------------------
                                                               1997        1996
                                                               ----        ----
                                                                (IN THOUSANDS)
<S>                                                          <C>         <C>
Insurance premiums
  Traditional life insurance premiums....................    $236,878    $228,986
  Immediate annuity and supplementary contract
     premiums............................................      17,238      16,082
  Other premiums.........................................         156       1,723
                                                             --------    --------
       Total insurance premiums..........................     254,272     246,791
Universal life product charges...........................      59,236      57,834
Annuity product charges..................................       1,669         837
                                                             --------    --------
       Total product charges.............................      60,905      58,671
Net investment income....................................     338,190     284,954
Realized gains on investments............................      14,509      66,464
                                                             --------    --------
       Total revenues....................................    $667,876    $656,880
                                                             ========    ========
</TABLE>
 
     In 1997, individual life and annuity premiums and product charges increased
by $11.2 million to $315.0 million, or 3.7%, from $303.8 million in 1996.
Included in this increase was $1.2 million of premium and product charges earned
in the fourth quarter resulting primarily from Delta. Insurance premiums
increased by $7.5 million to $254.3 million in 1997 compared to $246.8 million
in 1996. Traditional life
 
                                       25
<PAGE>   97
 
insurance premiums increased by $7.9 million in 1997. The increase in
traditional life insurance premiums in 1997 was primarily the result of
continued growth in renewal premiums and also the increased sales of term life
insurance products. Changes in the level of immediate annuity deposits and
supplementary contract premiums were primarily the result of fluctuations in
immediate annuity and supplementary contract sales. Other premiums decreased in
1997 primarily due to the sale of the Company's remaining group life operation
in 1996.
 
     Universal life product charges increased slightly in 1997 primarily due to
increased cost of insurance charges as a result of the normal aging of that
block of business. Annuity product charges for 1997 included $0.7 million earned
in the fourth quarter by recently acquired companies.
 
     Net investment income increased by $53.3 million to $338.2 million in 1997
compared to $284.9 million in 1996. Included in the 1997 increase in net
investment income was $30.2 million of net investment income from recently
acquired companies during the fourth quarter. The remaining $23.1 million
increase in 1997 was attributable to an increase in average invested assets and
effective yields on average invested assets. Average invested assets (excluding
market value adjustments and acquisitions) in 1997 increased by $111.5 million
from 1996, and the effective yield on average invested assets (excluding market
value adjustments and acquisitions) increased to 7.89% in 1997 from 7.55% in
1996. Contributing to the higher yields in 1997 was investment income of $10.1
million from equity in earnings of certain investment partnerships.
 
     Realized gains on investments were $14.5 million in 1997 compared to gains
of $66.4 million in 1996. Included in the amounts for 1996 were approximately
$51.1 million of gains from the sale of common stock as a result of the
liquidation of the Company's equity portfolio primarily during the first quarter
of 1996.
 
     A summary of the Company's combined policyowner benefits, including
policyowner benefits associated with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                              -------------------
                                                                1997       1996
                                                                ----       ----
                                                                (IN THOUSANDS)
<S>                                                           <C>        <C>
Traditional life insurance
  Death benefits............................................  $ 40,821   $ 32,251
  Change in liability for future policy benefits and other
     policy benefits........................................   170,275    160,036
                                                              --------   --------
     Total traditional life insurance benefits..............   211,096    192,287
Universal life insurance
  Death benefits in excess of cash value....................    24,682     23,871
  Interest credited to policyowner account balances.........    45,232     43,203
  Other policy benefits.....................................     3,453      3,026
                                                              --------   --------
     Total universal life insurance benefits................    73,367     70,100
Annuities
  Interest credited to deferred annuity account balances....    80,440     66,254
  Other annuity benefits....................................    37,133     34,334
                                                              --------   --------
     Total annuity benefits.................................   117,573    100,588
Miscellaneous benefits......................................       578      2,845
                                                              --------   --------
     Total policyowner benefits.............................  $402,614   $365,820
                                                              ========   ========
</TABLE>
 
     Total policyowner benefits were $402.6 million in 1997 compared to $365.8
million in 1996 or an increase of $36.8 million. The 1997 amount included fourth
quarter benefits of acquired companies of $23.4 million consisting primarily of
interest credited to annuity account balances and other annuity benefits.
 
     Traditional life insurance benefits increased by $18.8 million in 1997. The
increase in 1997 was primarily due to the growth and aging of the business in
force and increased death benefits as a result of higher mortality. Universal
life insurance benefits increased by $3.3 million in 1997. The increased
benefits in 1997 were due to increased interest credited to policyowner account
balances and increased death benefits due to
 
                                       26
<PAGE>   98
 
higher mortality. While the weighted average crediting rate for AmerUs Life's
universal life liabilities decreased four basis points to 6.23% in 1997 from
6.27% in 1996, AmerUs Life's average liabilities increased by $33.7 million from
1996 to 1997, resulting in the increased credited amounts in 1997.
 
     Annuity benefits, including the fourth quarter results of recent
acquisitions, were $117.6 million, an increase of $17.0 million compared to
1996. The annuity benefits of recent acquisitions amounted to $23.2 million
which were partially offset by a $6.2 million decrease in AmerUs Life's annuity
benefits in 1997 to $94.4 million compared to $100.6 million in 1996. The
decrease in AmerUs Life's annuity benefits during 1997 was due to reduced
interest credited to policyowner account balances. The weighted average
crediting rate for AmerUs Life's individual deferred annuity liabilities
decreased eleven basis points to 5.25% in 1997 compared to 5.36% in 1996 and
AmerUs Life's average deferred annuity liabilities decreased by $119.1 million
from 1996 to 1997, also contributing to the lower interest credited amounts in
1997 for AmerUs Life. Most annuity sales after May, 1996 have been recorded by
the Ameritas Joint Venture, resulting in a decrease in the average deferred
annuity liabilities at AmerUs Life.
 
     Miscellaneous benefits decreased in 1997 primarily due to the sale of the
Company's remaining group life operation in 1996.
 
     A summary of the Company's combined expenses, including expenses associated
with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                             --------------------
                                                               1997        1996
                                                               ----        ----
<S>                                                          <C>         <C>
Commission expense, net of deferrals.....................    $  8,252    $  7,892
Other underwriting, acquisition and insurance expenses,
  net of deferrals.......................................      50,014      49,934
Amortization of deferred policy acquisition costs........      52,457      58,572
                                                             --------    --------
     Total expenses......................................    $110,723    $116,398
                                                             ========    ========
</TABLE>
 
     The Company's commission expense, net of deferrals, increased by $0.4
million to $8.3 million in 1997, compared to $7.9 million in 1996. The increase
in 1997 was primarily the result of the fourth quarter commission expense, net
of deferrals, of the Company's recent acquisitions. Other underwriting,
acquisition and insurance expenses, net of deferrals, were $50.0 million in
1997, compared to $49.9 million in 1996. Included in the 1997 expenses were $4.1
million of fourth quarter expenses, net of deferrals, attributable to the
recently acquired companies.
 
     Excluding recently acquired companies, other underwriting, acquisition and
insurance expenses, net of deferrals, decreased by $4.0 million to $45.9 million
in 1997. This decrease in expenses during 1997 was primarily due to the
establishment of a $5.0 million litigation reserve during 1996 in connection
with certain class action litigation, partially offset by a $1.3 million
write-off of expenses during 1997 related to the former bank credit facility
which was replaced by a new agreement in the fourth quarter of 1997.
 
     The amortization of deferred policy acquisition costs decreased by $6.1
million in 1997. Deferred policy acquisition costs are generally amortized in
proportion to gross margins, including realized capital gains. Higher death
benefits and lower realized capital gains in 1997, compared to 1996, contributed
to lower gross margins in 1997 on products for which deferred costs are
amortized, resulting in the lower amortization in 1997.
 
     Dividends to policyowners increased by $5.7 million, to $61.2 million in
1997 compared to $55.5 million in 1996. The increase in dividends was primarily
the result of the growth and aging of in force business. Traditional life
reserves grew 8.1% to the end of 1997, to $1.31 billion. The weighted average
dividend interest rate credited to these policies was 7.19% in 1997 compared to
7.17% in 1996.
 
     Income from operations decreased by $25.7 million, to $93.4 million in 1997
compared to $119.1 million in 1996. Recent acquisitions added $3.3 million of
income from operations during the fourth quarter. However,
 
                                       27
<PAGE>   99
 
the overall decrease in 1997 income from operations was primarily due to the
decrease in realized gains on investments in 1997.
 
     Interest expense increased by $12.9 million in 1997 to $15.0 million
compared to $2.1 million in 1996. The increase in interest expense in 1997 was
primarily due to the interest expense on the capital securities issued by the
Company during 1997 and interest expense on the revolving line of credit. This
added interest expense was largely offset by investment of the borrowed funds
which contributed to the growth in invested assets and the higher investment
earnings of 1997.
 
     Income before income tax expense and equity in earnings of unconsolidated
subsidiary decreased by $38.6 million to $78.4 million in 1997 compared to
$117.0 million in 1996. While acquisitions added $3.3 million of income before
income tax expense during the fourth quarter, the overall decrease in 1997
income resulted primarily from the decrease in realized gains on investments in
1997.
 
     Income tax expense decreased by $21.8 million in 1997 to $22.0 million
compared to $43.8 million in 1996. The decrease in 1997 was primarily due to the
lower pre-tax income as a result of the lower realized gains on investments, a
$4.5 million provision for the equity add-on tax included in the first half of
1996, and increased tax credits of $3.9 million in 1997. The equity add-on tax
is applicable only to mutual life insurance companies and the Company believes
such tax is not applicable to the Company after June 30, 1996 due to the
conversion of AmerUs Life into a stock company.
 
     Net income decreased by $16.1 million in 1997 to $58.1 million compared to
$74.2 million in 1996. Net income for 1997 included $1.8 million resulting from
acquisitions during the fourth quarter. The overall lower net income for 1997
was primarily due to lower realized gains on investments.
 
     1996 COMPARED TO 1995
 
     A summary of the Company's combined revenues, including revenues associated
with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED
                                                              DECEMBER 31,
                                                           -------------------
                                                             1996       1995
                                                             ----       ----
                                                             (IN THOUSANDS)
<S>                                                        <C>        <C>
Insurance premiums
  Traditional life insurance premiums....................  $228,986   $219,732
  Immediate annuity and supplementary contract
     premiums............................................    16,082     17,659
  Other premiums.........................................     1,723      6,696
                                                           --------   --------
     Total insurance premiums............................   246,791    244,087
Universal life product charges...........................    57,834     56,763
Annuity product charges..................................       837        607
                                                           --------   --------
     Total product charges...............................    58,671     57,370
Net investment income....................................   284,954    285,244
Realized gains on investments............................    66,464     51,387
                                                           --------   --------
     Total revenues......................................  $656,880   $638,088
                                                           ========   ========
</TABLE>
 
     In 1996, individual life and annuity premiums and product charges increased
by $9.0 million to $303.8 million, or 3.1%, from $294.8 million in 1995.
Insurance premiums increased by $2.7 million to $246.8 million in 1996 compared
to $244.1 million in 1995. Traditional life insurance premiums increased by $9.3
million in 1996. The increase in traditional life insurance premiums in 1996 was
primarily the result of continued growth in renewal premiums. Changes in the
level of immediate annuity deposits and supplementary contract premiums were
primarily the result of fluctuations in immediate annuity and supplementary
contract sales. Other premiums decreased significantly in 1996 primarily due to
the Company's exit from several group life and long-term disability reinsurance
pools in the second half of 1995 and the sale of the Company's remaining group
life operation in the third quarter of 1996.
 
                                       28
<PAGE>   100
 
     Universal life product charges increased slightly in 1996 primarily due to
increased cost of insurance charges as a result of the normal aging of that
block of business.
 
     Net investment income decreased by $0.3 million to $284.9 million in 1996
compared to $285.2 million in 1995. The decrease in net investment income in
1996 was attributable to an increase in average invested assets more than offset
by declines in the effective yields on average invested assets. Average invested
assets (excluding market value adjustments) increased by $171.8 million largely
as a result of the investment of the $175.0 million proceeds from bank
borrowings late during the year. The effective yield on average invested assets
(excluding market value adjustments) decreased to 7.55% in 1996 from 7.88% in
1995. The decrease in effective yield in 1996 was primarily due to lower bond
yields and the timing of the investment of the proceeds from the bank borrowing.
 
     Realized gains on investments were $66.4 million in 1996 compared to gains
of $51.4 million in 1995. Included in the amounts for 1996 were approximately
$51.1 million of gains from the sale of common stock as a result of the
liquidation of the Company's equity portfolio which commenced in 1995. The
increase in gains of $15.0 million in 1996 resulted primarily from increased
sales of common stock in the investment portfolio. The sale of common stock in
1996 and 1995 was a direct result of the Company's decision to reduce the level
of equity securities as a percentage of its investment portfolio on a long-term
basis. Proceeds from these sales were invested primarily in fixed maturity
securities.
 
     A summary of the Company's combined policyowner benefits, including
policyowner benefits associated with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                             --------------------
                                                               1996        1995
                                                               ----        ----
                                                                (IN THOUSANDS)
<S>                                                          <C>         <C>
Traditional life insurance
  Death benefits.........................................    $ 32,251    $ 32,196
  Change in liability for future policy benefits and
     other policy benefits...............................     160,036     152,742
                                                             --------    --------
       Total traditional life insurance benefits.........     192,287     184,938
Universal life insurance
  Death benefits in excess of cash value.................      23,871      20,802
  Interest credited to policyowner account balances......      43,203      41,532
  Other policy benefits..................................       3,026       5,218
                                                             --------    --------
       Total universal life insurance benefits...........      70,100      67,552
Annuities
  Interest credited to deferred annuity account
     balances............................................      66,254      78,120
  Other annuity benefits.................................      34,334      35,582
                                                             --------    --------
       Total annuity benefits............................     100,588     113,702
Miscellaneous benefits...................................       2,845       8,428
                                                             --------    --------
       Total policyowner benefits........................    $365,820    $374,620
                                                             ========    ========
</TABLE>
 
     Total policyowner benefits were $365.8 million in 1996 compared to $374.6
million in 1995. Traditional life insurance benefits increased by $7.3 million
in 1996 primarily due to the growth and aging of the business in force.
Universal life insurance benefits increased by $2.5 million in 1996. The
increased benefits in 1996 were due to increased interest credited to
policyowner account balances and increased death benefits due to higher
mortality. While the weighted average crediting rate for AmerUs Life's universal
life liabilities decreased 19 basis points to 6.27% in 1996 from 6.46% in 1995,
the AmerUs Life's average liabilities increased by $39.8 million from 1995 to
1996, resulting in the increased interest credited amounts in 1996.
 
     Annuity benefits decreased $13.1 million in 1996 to $100.6 million compared
to $113.7 million in 1995, primarily due to reduced interest credited to
policyowner account balances. The weighted average crediting
 
                                       29
<PAGE>   101
 
rate for AmerUs Life's individual deferred annuity liabilities decreased 80
basis points to 5.36% in 1996 compared to 6.16% in 1995 and AmerUs Life's
average deferred annuity liabilities decreased by $71.0 million from 1995 to
1996, also contributing to the lower interest credited amounts in 1996.
 
     Miscellaneous benefits decreased significantly in 1996 primarily due to the
Company's exit from several group life and long-term disability reinsurance
pools in the second half of 1995 and the sale of the Company's remaining group
life operation in the third quarter of 1996.
 
     A summary of the Company's combined expenses, including expenses associated
with the Closed Block, follows:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                             --------------------
                                                               1996        1995
                                                               ----        ----
                                                                (IN THOUSANDS)
<S>                                                          <C>         <C>
Commission expense, net of deferrals.....................    $  7,892    $ 10,448
Other underwriting, acquisition and insurance expenses,
  net of deferrals.......................................      49,934      40,461
Amortization of deferred policy acquisition costs........      58,572      50,239
                                                             --------    --------
     Total expenses......................................    $116,398    $101,148
                                                             ========    ========
</TABLE>
 
     The Company's commission expense, net of deferrals, decreased by $2.5
million to $7.9 million in 1996 compared to $10.4 million in 1995. The reduction
in 1996 was primarily due to a decrease in gross commission expense as a result
of lower life insurance sales in 1996 and the transfer of new annuity sales to
the Ameritas Joint Venture in May 1996. Other underwriting, acquisition and
insurance expenses, net of deferrals, increased to $49.9 million in 1996 from
$40.5 million in 1995. The increase in expenses in 1996 was due to increased
settlements and associated legal fees of $4.7 million, primarily due to the $5.0
million class action litigation reserve; expenses related to changing the name
of the Company of $0.7 million; higher premium taxes of $1.1 million due to a
one-time adjustment to the amortization of the guaranty association asset and an
increased accrual for estimated future assessments; combined with a gain of $3.1
million recorded against 1995 expenses resulting from the curtailment of the
Company's defined benefit pension plans effective December 31, 1995.
 
     The amortization of deferred policy acquisition costs increased by $8.3
million in 1996. The increased amortization in 1996 was primarily due to higher
gross margins, including increased realized capital gains in 1996, on products
for which deferred costs are amortized.
 
     Dividends to policyowners increased by $6.1 million, or 12.3%, to $55.5
million in 1996 compared to $49.4 million in 1995. The increase in dividends was
primarily the result of the growth and aging of in force business. Traditional
life reserves grew 7.7% from the end of 1995 to the end of 1996. The weighted
average dividend rate credited to these policies was 7.17% in 1996 compared to
7.14% in 1995.
 
     Income from operations increased to $119.1 million in 1996, compared to
$112.9 million in 1995. The increase in 1996 resulted primarily from the
increase in realized gains on investments.
 
     Income before income tax expense and equity in earnings of unconsolidated
subsidiary increased by $6.5 million to $117.0 million in 1996 compared to
$110.5 million in 1995. The increase in 1996 resulted primarily from the
increase in realized gains on investments.
 
     Income tax expense increased by $2.6 million in 1996 to $43.8 million
compared to $41.2 million in 1995. The increase in 1996 income taxes was
primarily the result of the higher pre-tax income due primarily to the increased
realized gains on investments and a $4.5 million provision for the equity add-on
tax in the first half of 1996, partially offset by $2.7 million of low-income
housing tax credits in 1996. The equity add-on tax is applicable only to mutual
life insurance companies and the Company believes such tax is not applicable to
the Company after June 30, 1996 due to the conversion of AmerUs Life into a
stock company.
 
                                       30
<PAGE>   102
 
     Net income increased by $4.9 million in 1996 to $74.2 million compared to
$69.3 million in 1995. The increased net income in 1996 was primarily due to
higher realized gains on investments.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     THE COMPANY
 
     The Company's cash flows from operations consist of dividends from
subsidiaries, if declared and paid, interest income on loans and advances to its
subsidiaries (including a surplus note issued to the Company by AmerUs Life),
investment income on assets held by the Company and fees which the Company
charges its subsidiaries and certain other of its affiliates for management
services, offset by the expenses incurred for debt service, salaries and other
expenses.
 
     The Company intends to rely primarily on dividends and interest income from
its life insurance subsidiaries in order to make dividend payments to its
shareholders. The payment of dividends by its life insurance subsidiaries is
regulated under various state laws. Under Iowa law, AmerUs Life and Delta Life
may pay dividends only from the earned surplus arising from their respective
businesses and must receive the prior approval of the Iowa Commissioner to pay
any dividend that would exceed certain statutory limitations. The current
statutory limitation is the greater of (i) 10% of the respective company's
policyowners' surplus as of the preceding year end or (ii) the net gain from
operations for the previous calendar year. Iowa law gives the Iowa Commissioner
broad discretion to disapprove requests for dividends in excess of these limits.
Based on these limitations and 1997 results, AmerUs Life and Delta Life would
have been able to pay approximately $58 million and $8 million in dividends in
1998 respectively without obtaining the Iowa Commissioner's approval. The
payment of dividends by American and FBL is regulated under Kansas law, which
has statutory limitations similar to those in place in Iowa. Based on these
limitations and 1997 results, AmVestors' subsidiaries could pay approximately
$15 million in dividends in 1998. On February 26, 1998 AmerUs Life paid the
Company $5 million in dividends. Based upon the cumulative limitations and 1997
results, the Company's subsidiaries could pay an estimated $75 million in
additional dividends in 1998 without obtaining regulatory approval.
 
     On October 23, 1997, the Company entered into a $250 million revolving
credit facility with a syndicate of lenders (the "Bank Credit Facility") to be
used to replace its existing revolving credit facility, to finance the
acquisition of Delta, to finance permitted mergers and acquisitions and for
other general corporate purposes. The Bank Credit Facility is secured by a
pledge of approximately 49.9% of the outstanding common stock of AmerUs Life,
100% of the outstanding common stock of Delta and a $50 million 9% surplus note
payable to the Company by AmerUs Life. As of December 31, 1997, there was an
outstanding loan balance of $250 million under the facility. The Bank Credit
Facility provides for typical events of default and covenants with respect to
the conduct of the business of the Company and its subsidiaries and requires the
maintenance of various financial levels and ratios. Among other covenants, the
Company (a) cannot have a leverage ratio greater than 0.35:1.0 or an interest
coverage ratio less than 2.5:1.0, (b) is prohibited from paying cash dividends
on its common stock in excess of an amount equal to 3% of its consolidated net
worth as of the last day of the preceding fiscal year, and (c) must cause
certain of its subsidiaries, including AmerUs Life and Delta Life, to maintain
certain ratings from A.M. Best and certain levels of adjusted capital and
surplus and risk-based capital.
 
     The Company may from time to time review other potential acquisition
opportunities. The Company anticipates that funding for any such acquisition may
be provided from available cash resources, from debt or equity financing or
stock-for-stock acquisitions. In the future, the Company anticipates that its
liquidity and capital needs will be met through interest and dividends from its
life insurance subsidiaries, accessing the public equity and debt markets
depending upon market conditions, or alternatively from bank financing.
 
     LIFE INSURANCE SUBSIDIARIES
 
     The cash inflows of the Company's life insurance subsidiaries consist
primarily of premium income, deposits to policyowner account balances, income
from investments, sales, maturities and calls of investments and repayments of
investment principal. Cash outflows are primarily related to withdrawals of
policyowner
 
                                       31
<PAGE>   103
 
account balances, investment purchases, payment of policy acquisition costs,
payment of policyowner benefits, income taxes and current operating expenses.
Life insurance companies generally produce a positive cash flow from operations,
as measured by the amount by which cash inflows are adequate to meet benefit
obligations to policyowners and normal operating expenses as they are incurred.
The remaining cash flow is generally used to increase the asset base to provide
funds to meet the need for future policy benefit payments and for writing new
business.
 
     Management anticipates that funds to meet its short-term and long-term
capital expenditures, cash dividends to shareholders and operating cash needs
will come from existing capital and internally generated funds. Management
believes that the current level of cash and available-for-sale and short-term
securities, combined with expected net cash inflows from operations, maturities
of fixed maturity investments, principal payments on mortgage-backed securities
and its insurance products, will be adequate to meet the anticipated short-term
cash obligations of the Company's life insurance subsidiaries.
 
     The Company and its subsidiaries generated cash flows from operating
activities of $224.4 million, $147.6 million and $189.1 million for the years
ended December 31, 1997, 1996 and 1995 respectively. Excess operating cash flows
were primarily used to increase the Company's fixed maturity investment
portfolio.
 
     Matching the investment portfolio maturities to the cash flow demands of
the type of insurance being provided is an important consideration for each type
of life insurance product and annuity. The Company continuously monitors
benefits and surrenders to provide projections of future cash requirements. As
part of this monitoring process, the Company performs cash flow testing of its
assets and liabilities under various scenarios to evaluate the adequacy of
reserves. In developing its investment strategy, the Company establishes a level
of cash and securities which, combined with expected net cash inflows from
operations, maturities of fixed maturity investments and principal payments on
mortgage-backed securities, are believed adequate to meet anticipated short-term
and long-term benefit and expense payment obligations. There can be no assurance
that future experience regarding benefits and surrenders will be similar to
historic experience since withdrawal and surrender levels are influenced by such
factors as the interest rate environment and the claims-paying and financial
strength ratings of the Company's life insurance subsidiaries.
 
     The Company takes into account asset-liability management considerations in
the product development and design process. Contract terms for the Company's
interest-sensitive products include surrender and withdrawal provisions which
mitigate the risk of losses due to early withdrawals. These provisions generally
do one or more of the following: limit the amount of penalty-free withdrawals,
limit the circumstances under which withdrawals are permitted, or assess a
surrender charge or market value adjustment relating to the underlying assets.
The following table summarizes statutory liabilities for interest-sensitive life
products and annuities by their contractual withdrawal provisions at December
31, 1997 (dollars in millions):
 
<TABLE>
<S>                                                             <C>
Not subject to discretionary withdrawal.....................    $  412.9
Subject to discretionary withdrawal with adjustments:
  Specified surrender charges(A)............................     4,546.9
  Market value adjustments..................................     1,319.2
                                                                --------
     Subtotal...............................................     5,866.1
                                                                --------
Subject to discretionary withdrawal without adjustments.....       711.5
                                                                --------
     Total..................................................    $6,990.5
                                                                ========
</TABLE>
 
- -------------------------
(A) Includes $1,674.3 million of statutory liabilities with a contractual
    surrender charge of less than five percent of the account balance.
 
     Through its membership in the Federal Home Loan Bank ("FHLB") of Des
Moines, AmerUs Life is eligible to borrow on a line of credit available to
provide it with additional liquidity. Interest is payable at a current rate at
the time of any advance. As of December 31, 1997, AmerUs Life had a $25.0
million open secured line of credit against which there were no borrowings. In
addition to the line of credit, AmerUs Life has long-term advances from the FHLB
outstanding of $16.4 million at December 31, 1997.
 
                                       32
<PAGE>   104
 
     The Company's life insurance subsidiaries may also obtain liquidity through
sales of investments or borrowings collateralized by their investment
portfolios. The Company's investment portfolio as of December 31, 1997 had a
carrying value of $8.9 billion, including Closed Block investments. As of
December 31, 1997, fixed maturity securities were $7.9 billion or 88.9% of
invested assets, with public and private fixed maturity securities constituting
$7.5 billion, or 95.4%, and $0.4 billion, or 4.6%, of total fixed maturity
securities, respectively.
 
     At December 31, 1997, the statutory surplus of AmerUs Life, Delta Life,
American and FBL were approximately $325 million, $83 million, $112 million and
$41 million, respectively. The Company believes that these levels of statutory
capital are more than adequate as each life insurance subsidiary's risk-based
capital is significantly in excess of required levels.
 
     In the future, in addition to their cash flows from operations and
borrowing capacity, the life insurance subsidiaries would anticipate obtaining
their required capital from the Company as the Company will have access to the
public debt and equity markets.
 
YEAR 2000 COMPLIANCE
 
     As the year 2000 approaches, an important business issue has emerged
regarding how existing application software programs and operating systems can
accommodate the date value "2000." Many existing application software products
were designed to only accommodate a two digit date position which represents the
year (e.g., the number "95" is stored on the system and represents the year
1995). As a result, the year 1999 (i.e., "99") is the maximum date value many
systems will be able to accurately process. The Company formed a year 2000
working group to address potential problems posed by this development to assure
that the Company is prepared for the year 2000. The Company has already made
significant progress in accomplishing the necessary modifications and
conversions to deal with year 2000 issues and anticipates that the majority of
the required efforts will be completed by the end of 1998. Management does not
anticipate that the Company will incur significant operating expenses or be
required to invest heavily in computer system improvements to address year 2000
issues. Total estimated costs are in a range of $4 to $6 million with
approximately $3 million to be incurred in 1998. However, if modifications and
conversions to deal with year 2000 issues are not completed on a timely basis or
are not fully effective, such issues may have a material adverse effect on the
operations of the Company. All costs associated with year 2000 modifications and
conversions will be expensed as incurred.
 
                                       33
<PAGE>   105
 
                                    BUSINESS
 
OVERVIEW
 
     GENERAL
 
     The Company is an insurance holding company engaged through its
subsidiaries in the business of marketing, underwriting and distributing a broad
range of individual life insurance and annuity products to individuals and
businesses in 49 states, the District of Columbia and the U.S. Virgin Islands.
The Company's primary product offerings consist of whole life, universal life
and term life insurance policies and fixed annuities. As of December 31, 1997,
the Company had approximately 573,000 life insurance policies and annuity
contracts outstanding and individual life insurance in force, net of
reinsurance, of approximately $26.7 billion with life insurance reserves of $2.4
billion and annuity reserves of $6.1 billion. As of December 31, 1997, the
Company had total assets of $10.3 billion and total shareholders' equity of
$928.0 million. In addition, through the Ameritas Joint Venture with Ameritas,
AmerUs Life markets fixed annuities issued by AVLIC and sells AVLIC's variable
life insurance and variable annuity products.
 
     THE COMPANY'S PRINCIPAL SUBSIDIARIES
 
     The Company's principal subsidiaries are AmerUs Life, Delta and AmVestors.
AmerUs Life was originally incorporated in 1896 as a mutual insurance company.
AmerUs Life's target customers are individuals in the middle and upper income
brackets and small businesses. Its geographic focus is national in scope (except
for Connecticut, Maine, New Hampshire, New York and Vermont, in which AmerUs
Life is not licensed to do business), and it primarily serves suburban and rural
areas. Efforts are currently underway to expand AmerUs Life's territory into the
states of Connecticut, Maine, New Hampshire and Vermont. AmerUs Life distributes
its products primarily through a combination of career general agency and PPGA
distribution systems, as well as a network of independent brokers. The career
general agency system consists of a network of 35 career general agencies, with
approximately 570 career agents. The PPGA system is comprised of approximately
425 PPGA's, who have approximately 1,100 agents. As of December 31, 1997, AmerUs
Life had approximately 408,000 life insurance policies and annuity contracts
outstanding and individual life insurance in force, net of reinsurance, of
approximately $26.6 billion. Variable life insurance products and the fixed and
variable annuities offered by the Ameritas Joint Venture are marketed through
AmerUs Life's distribution systems and the distribution systems of Ameritas and
AVLIC, which consist of approximately 160 agents and 540 independent
broker-dealers (with approximately 9,000 registered representatives),
respectively.
 
     The Company made two major acquisitions in 1997. The Company acquired Delta
on October 23 for approximately $165 million in cash and AmVestors on December
19 in a stock exchange valued at approximately $350 million. These acquisitions,
along with the growth of AmerUs Life, increased the Company's assets from $4.4
billion at December 31, 1996 to $10.3 billion at December 31, 1997.
 
     The principal asset of Delta is its wholly-owned subsidiary, Delta Life, an
Iowa domiciled life insurance company. Delta Life is licensed in the District of
Columbia and in all states except New York, and specializes in the sale of
individual single and flexible premium deferred annuities, primarily in the
southeastern, western, southwestern and midwestern regions of the United States.
Sales are made primarily through a network of over 3,300 independent agents.
Delta Life's strategy is to structure its fixed annuity products to appeal to
the conservative retirement saver who is seeking principal preservation and
consistency of earnings. Most of Delta Life's products are innovative in that
they incorporate a fixed contractual management fee. Approximately 58% of
Delta's 1997 direct collected premiums were derived from retirement-oriented
tax-qualified annuities. Delta had direct collected premiums of $192.6 million
in 1997 and as of December 31, 1997 had annuity reserves of $1.8 billion. See
"Reorganization and Recent Acquisitions -- Acquisition of Delta Life
Corporation".
 
     AmVestors' principal operating subsidiaries are American, a Kansas
domiciled life insurance company licensed in 48 states and the District of
Columbia; and FBL, a Kansas domiciled life insurance company doing business in
40 states, the District of Columbia and the U.S. Virgin Islands. AmVestors
specializes in the sale of annuity products, further strengthening the Company's
presence in the rapidly growing asset accumulation
 
                                       34
<PAGE>   106
 
and retirement and savings markets. AmVestors utilizes product features intended
to enhance the potential for profit by encouraging persistency and reducing
premature withdrawal during the first five to fourteen years of an annuity
contract. AmVestors distributes its products through a national network of
approximately 7,800 licensed independent agents recruited through its
wholly-owned subsidiaries, as well as through almost 60 independent marketing
organizations. As of December 31, 1997, AmVestors had approximately 104,000
annuity contracts outstanding. AmVestors had direct collected premiums of $583.4
million in 1997 and as of December 31, 1997 had annuity reserves of $3.1
billion. See "Reorganization and Recent Acquisitions -- Acquisition of AmVestors
Financial Corporation."
 
     AMERITAS JOINT VENTURE
 
     On April 1, 1996 the Company commenced the Ameritas Joint Venture with
Ameritas. The Company participates in the Ameritas Joint Venture through AmerUs
Life's 34% ownership interest in AMAL. AMAL's operations are conducted through
AVLIC and Ameritas Investment Corp. ("AIC"), its two wholly-owned subsidiaries,
which have been in business since 1983. AVLIC is licensed to conduct business in
46 states and the District of Columbia. AIC is a registered broker-dealer which
is licensed to do business in all states except New York. As of December 31,
1997, AMAL had total consolidated assets of $1.5 billion and total consolidated
shareholder's equity of $72.0 million on a GAAP basis. AVLIC had $3.8 billion of
insurance in force and $45.3 million in surplus as of December 31, 1997, on a
statutory basis. AmerUs Life's partner in the Ameritas Joint Venture, Ameritas,
is a Nebraska life insurance company which has been in existence for more than
100 years. The distribution systems of Ameritas and AVLIC consist of
approximately 160 agents and 540 independent broker-dealers with approximately
9,000 registered representatives. On a statutory basis, Ameritas had $1.9
billion in assets, $8.2 billion of insurance in force and $311.3 million in
surplus as of December 31, 1997.
 
     AmerUs Life's investment in the Ameritas Joint Venture affords AmerUs Life
access to a line of existing variable life insurance and annuity products.
AmerUs Life and Ameritas have equal membership on the board of directors of
AMAL, AVLIC and AIC. The Company and Ameritas each have guaranteed the
obligations of AVLIC. The guarantee of each party is joint and several, and will
remain in effect until certain financial conditions are met. Under the terms of
the Joint Venture Agreement, AmerUs Life has an option to purchase an additional
5% to 15% of AMAL if certain premium growth targets are met.
 
STRATEGY
 
     The business strategy of the Company is to focus on providing individual
retail consumers in the United States with superior financial services and
products that will meet their financial planning, risk protection, and asset
accumulation needs. Target markets of the Company include individuals in the
middle and upper income brackets and small businesses. Its geographic focus is
national in scope (except for New York, in which the Company is not licensed to
do business), and it primarily serves suburban and rural areas.
 
     The Company seeks to effect this strategy by focusing on life insurance and
asset accumulation products distributed through a variety of distribution
systems. In particular, the Company has developed a very strong position in the
distribution of fixed annuities through independent agents and has a long
established reputation as a provider of whole life insurance products,
distributed through career and PPGA agency distribution systems, that are among
the most attractively priced products to consumers in the industry.
 
     The Company's strategy emphasizes effective management of certain operating
fundamentals -- mortality, expenses, persistency and investment results -- where
the Company's results have historically compared favorably to the industry. The
Company's operating strengths have enabled it to provide attractively priced
products to consumers while also generating profitability for its shareholders.
 
     Growth through a combination of internal growth and mergers, acquisitions
and strategic alliances is a key element of the Company's strategy. In the life
insurance market, the Company presently has only 0.3% of new life insurance
sales nationwide, which provides substantial opportunity for increased growth
through improved marketing and sales execution even in a generally flat business
environment.
 
                                       35
<PAGE>   107
 
     In the fixed annuity area, the Company is presently a leader in the
distribution of fixed annuities through independent agents. Independent agents
have increased their share of fixed annuity sales in recent years and the
Company's goal is to consistently rank among the top 3 to 5 providers in this
segment.
 
     The Company continues to seek to both deepen and diversify its distribution
channels. Primarily as a result of the acquisitions of AmVestors and Delta, the
Company's distribution channels have grown significantly in recent years. As of
December 31, 1997, the Company had over 15,000 distributors as compared to
approximately 3,700 distributed as of December 31, 1996. While continuing to
expand its existing channels, the Company is in the process of developing
additional bank and major independent marketing organization distribution
channels.
 
     The Company believes it is well positioned to compete effectively based
upon a number of strengths including its strong operating performance,
customer-driven product offerings, productive and diversified distribution
systems, sophisticated asset-liability management capabilities and a customer
service orientation. In addition, the Company will continue to seek new business
opportunities through mergers, acquisitions and strategic alliances.
 
INTEGRATION OF RECENTLY ACQUIRED SUBSIDIARIES
 
     The Company made two major acquisitions in 1997, acquiring Delta on October
13, 1997 for approximately $165 million in cash and AmVestors on December 19,
1997 in a stock exchange valued at approximately $350 million. These
acquisitions, along with the growth of AmerUs Life, increased the Company's
assets from $4.4 billion at December 31, 1996 to $10.3 billion at December 31,
1997.
 
     The Company believes it has been successful in completing its integration
plans in respect of both Delta and AmVestors. The operations of Delta have been
integrated with those of AmerUs Life and the investment operations of AmVestors
have been merged with the investment management operations of the Company.
 
     Delta's operations have been integrated with AmerUs Life's operations
except for Delta's marketing, sales management and customer services functions
and the distribution system which will remain separate. Delta's offices in
Memphis, Tennessee have been closed and all of Delta's operations have been
relocated to AmerUs Life's facilities in Des Moines, Iowa. By integrating most
of Delta's operations with those of AmerUs Life, Delta has reduced the number of
employees by over 50%, and the Company currently projects that general insurance
and investment expenses of Delta, before deferrals, will be reduced by
approximately 48% or $10 million on an annualized basis following integration of
operations with AmerUs Life at the end of March, 1998. The Company believes that
additional expense reductions will be attainable as AmerUs Life's technology
enhancements, such as imaging, are applied to Delta Life's operations.
 
     The investment operations of AmVestors have been merged with those of the
Company. In addition, the Company intends to move towards the use of common
administrative systems and platforms for all of its annuity businesses. While
various other functions are also likely to be integrated (e.g. audit;
asset-liability management and some product development) the Company intends to
maintain AmVestors as a separate administrative as well as marketing and sales
entity. Savings from elimination of public company costs and reductions in
management personnel, when added to savings from integration of AmVestors'
investment operations with those of AmerUs, have produced initial savings
consistent with original expectations. Other staff reductions at AmVestors
completed during the first quarter of 1998 will probably produce savings in 1998
in excess of those anticipated at the time of the transactions. While AmVestors'
operations will be maintained, expense savings relating to the AmVestors
Acquisition are expected to exceed original expectations. Continued growth in
1999 and beyond should allow the estimated cost savings projected for later
years to be realized without the need for a potentially disruptive back office
integration.
 
PRODUCTS
 
     GENERAL
 
     The Company offers a diverse line of individual life insurance products
which are tailored to its markets. In addition, the Company recently acquired
Delta and AmVestors, through which it now offers additional
                                       36
<PAGE>   108
 
annuity products. The Company also is a party to the Ameritas Joint Venture,
which offers fixed and variable annuity and variable life insurance products. As
a result of superior operating fundamentals, including mortality, persistency,
operating expenses and investment yield, the Company has had a long history of
providing high-value, low-cost products to its customers, while operating
profitably. Moreover, the Company continuously reviews and updates its product
portfolio in order to continue offering a broad range of products at competitive
performance levels.
 
     The pricing of the Company's products is generally determined by reference
to actuarial calculations and statistical assumptions principally relating to
mortality, persistency, investment yield assumptions, estimates of expenses and
management's judgment as to market and competitive conditions. The premiums and
deposits received, together with assumed investment earnings, are designed to
cover policy benefits, expenses and policyowner dividends plus return a profit
to the Company. These profits arise from the margin between mortality charges
and insurance benefits paid, the margin between actual investment results and
the investment income credited to policies (either directly or through dividends
to policyowners) and the margin between expense charges and actual expenses. The
level of profits also depends on persistency because business acquisition costs,
particularly agent commissions, are recovered over the life of the policy.
Dividends and interest credited on policies (including policies included in the
Closed Block) may vary from time to time reflecting changes in investment,
mortality, persistency, expenses and other factors. Interest rate fluctuations
have an effect on investment income and may have an impact on policyowner
behavior. Increased lapses in policies may be experienced if the Company does
not maintain interest rates and dividend scales that are competitive with other
products in the marketplace.
 
     AMERUS LIFE PRODUCTS
 
     Traditional life insurance and universal life insurance have accounted for
approximately 70% and 30%, respectively, of AmerUs Life's total individual life
insurance premiums over the last three years. In addition, AmerUs Life has
historically offered a broad line of fixed annuity products.
 
     TRADITIONAL LIFE INSURANCE PRODUCTS. AmerUs Life's traditional life
insurance products have a long history of being highly competitive within the
industry. Traditional life insurance products include participating whole life
and term life insurance products. Participating whole life insurance is designed
to provide benefits for the life of the insured. This product generally provides
for level premiums and a level death benefit and requires payments in excess of
the mortality cost in earlier years to offset increasing mortality costs in
later years. AmerUs Life also offers a second to die whole life insurance
product which insures two lives and provides benefits upon the death of the
second insured. AmerUs Life targets its second to die products primarily to
potential customers seeking to achieve estate planning goals.
 
     AmerUs Life also offers a portfolio of term insurance policies that provide
life insurance protection for a specific time period (which generally can be
renewed at an increased premium). Such policies are mortality-based and offer no
cash accumulation feature. Term life insurance is a highly competitive and
quickly changing market. During 1997, AmerUs Life introduced new 10 and 20 year
term products. As a result, AmerUs Life's first year annualized premiums for
term insurance sales increased by 85% from 1996 to 1997.
 
     Since 1989, AmerUs Life has offered a flexible life insurance product which
is a combination of permanent participating whole life insurance, increasing
paid-up additions and decreasing term insurance coverage. These products give
policyowners additional flexibility in designing an appropriate combination of
permanent and term life insurance coverages to meet their specific needs at
varying premium levels.
 
     For the year ended December 31, 1997, sales of participating whole life and
term life insurance products represented 55% and 16%, respectively, of first
year annualized premiums for all individual life insurance products sold by
AmerUs Life.
 
     UNIVERSAL LIFE INSURANCE PRODUCTS. AmerUs Life offers universal life
insurance products, pursuant to which an insurance account is maintained for
each insurance policy. Premiums, net of specified expenses, are credited to the
account, as is interest, generally at a rate determined from time to time by
AmerUs Life. Specific charges are made against the account for the cost of
insurance and for expenses. The universal life
 
                                       37
<PAGE>   109
 
policy provides flexibility as to the amount and timing of premium payments and
the level of death benefits provided.
 
     AmerUs Life's universal life insurance products provide benefits for the
life of the insured. Within limits established by AmerUs Life and state
regulations, policyowners may vary the premiums and the amount of the policy's
death benefit as long as there are sufficient policy funds available to cover
all policy charges for the coming period. Interest is credited to the policy at
a rate determined from time to time by AmerUs Life. During 1997, AmerUs Life
introduced a new second to die universal life product for the estate planning
market, enhancing universal life production for the year. The weighted average
crediting rate for AmerUs Life's universal life insurance liabilities was 6.23%
for the year 1997, 6.27% for the year 1996 and 6.46% for the year 1995. For the
year ended December 31, 1997, sales of universal life insurance products
represented 29% of first year annualized premiums for all individual life
insurance products sold by AmerUs Life.
 
     FIXED ANNUITY PRODUCTS. Historically, AmerUs Life has offered a broad
portfolio of fixed annuity products. Annuities provide for the payment of
periodic benefits over a specified time period. Benefits may commence
immediately or may be deferred to a future date. Fixed annuities generally are
backed by a general investment account and credited with a rate of return that
is periodically reset.
 
     Since the formation of the Ameritas Joint Venture in May 1996,
substantially all individual deferred annuity sales by AmerUs Life's
distribution systems are made through the Ameritas Joint Venture, resulting in a
significant decline in the sale of such products by AmerUs Life. However, AmerUs
Life retained the right to continue to issue replacement business to its fixed
annuity customers in existence prior to the effective date of the Joint Venture
Agreement.
 
     DELTA PRODUCTS
 
     Delta specializes in the sale of deferred fixed and equity index annuities
to individuals. Delta's product offerings differ from those of many of its
competitors in two ways. First, Delta offers an interest rate crediting strategy
on almost all of its single and flexible premium deferred annuities that credits
the policy with a return generally based upon the interest rates it earns on
assets supporting the respective policies less contractual management fees. In
addition, these policies offer a lifetime guaranteed minimum interest crediting
rate and an annual guaranteed interest crediting rate. Second, Delta's current
investment policy provides for no less than 70% of policyowners' assets be
invested in securities issued, secured or guaranteed by the U.S. Government,
government agencies or government instrumentalities. The balance of these funds
is invested primarily in investment grade corporate bonds and commercial
mortgages.
 
     In 1996 and 1997 Delta introduced and commenced marketing two single
premium equity index annuity products that are based either on Standard & Poor's
500 Composite Stock Price Index(TM), or a basket of five international stock
market indices from France, Germany, Japan, Switzerland and the United Kingdom.
Earnings credited to these products are linked to increases in the anniversary
date values of the applicable index, less management fees. The policyowner is
guaranteed to receive at least 110% of the original premium at the end of the
seven year term of the policy, assuming no withdrawals.
 
     AMVESTORS PRODUCTS
 
     AmVestors specializes in the sale of fixed deferred annuity products to
individuals. During each of the past three years, sales of deferred annuities
have accounted for approximately 97% of AmVestors' premiums received, while
sales of single premium immediate annuities and flexible premium universal life
insurance have accounted for virtually all remaining premiums received. As of
December 31, 1997, AmVestors had total annuity reserves of $3.1 billion.
 
     AmVestors' deferred annuities have an initial credited interest rate
guaranteed for a period of one to five years. Following the initial guarantee
period, AmVestors may adjust the credited interest rate annually, subject to the
guaranteed minimum interest rates specified in the contracts. Such minimum
guaranteed rates currently range from 3% to 6%.
 
                                       38
<PAGE>   110
 
     AmVestors designs its products and directs its marketing efforts towards
the savings and retirement market. Historically, the 50 and older age group has
accounted for over 86% of all annuity premiums received by AmVestors. AmVestors
continues to target this age group because management believes that as this
group ages, it will have an increasing interest in saving for retirement,
nursing home care and unanticipated medical costs. The portfolio of products is
continuously reviewed with new plans added and others discontinued in an effort
to remain competitive.
 
     AMERITAS JOINT VENTURE PRODUCTS
 
     The Ameritas Joint Venture offers fixed annuity products which are
substantially similar to those previously marketed by AmerUs Life. In addition,
the Ameritas Joint Venture offers, through AVLIC, flexible premium and single
premium variable universal life insurance products and variable annuities.
Variable products provide for allocation of funds to a general account or to one
or more separate accounts under which the owner bears the investment risk.
Through AVLIC's fund managers, owners of variable annuities and life insurance
policies are able to choose from a range of investment funds offered by each
manager.
 
     Under the terms of the Joint Venture Agreement governing the Ameritas Joint
Venture, AmerUs Life and Ameritas write their new single and flexible premium
deferred fixed annuities and variable annuities and variable life insurance
through the Ameritas Joint Venture. AmerUs Life has retained the right to
continue to issue replacement business to its fixed annuity customers in
existence prior to the effective date of the Joint Venture Agreement.
 
     The variable life insurance products and the fixed and variable annuities
offered by the Ameritas Joint Venture are distributed through AmerUs Life's
career general agency and PPGA distribution systems, as well as through the
distribution systems of Ameritas and AVLIC.
 
     In response to customer demand, AmerUs Life developed an equity index
annuity which it began offering through the Ameritas Joint Venture in the fourth
quarter of 1996. An equity index annuity provides a minimum baseline fixed rate
of return in addition to sharing in a portion of the appreciation realized from
an investment in an indexed investment fund, such as the S&P 500 stock index.
AmerUs Life retained the right to issue this type of contract to certain of its
customers in existence prior to the effective date of the Joint Venture
Agreement and through certain other distribution systems. Sales of such products
amounted to 15% of AmerUs Life's total fixed annuity production in 1997.
 
DISTRIBUTION SYSTEMS
 
     AMERUS LIFE
 
     AmerUs Life markets its insurance products on a national basis primarily
through a career general agency system, a PPGA system, independent insurance
brokers and certain of AmerUs Life's affiliates. AmerUs Life currently employs
ten regional vice presidents who are responsible for supervising the career
general agencies and/or PPGA agents within their assigned geographic regions.
 
     CAREER GENERAL AGENCY SYSTEM AND BROKERS.  Under the career general agency
system, AmerUs Life enters into a contractual arrangement with the career
general agent for the sale of insurance products by the career agents and
brokers assigned to the career general agent's agency. The career general agents
are primarily compensated by receiving a percentage of the first year
commissions paid to career agents and brokers in the career general agent's
agency and by renewal commissions on premiums subsequently collected on that
business.
 
     The career general agents are independent contractors and are generally
responsible for the expenses of operating their agencies, including office and
overhead expenses and the recruiting, selection, contracting, training and
development of career agents and brokers in their agency. Currently, AmerUs Life
has 35 career general agents in 23 states, through which approximately 570
career agents sell AmerUs Life's products. While career agents in the career
general agency system are non-exclusive, AmerUs Life believes most agents use
AmerUs Life's products for a majority of their new business of the type of
products offered by AmerUs
                                       39
<PAGE>   111
 
Life. No single career general agency accounts for more than 10% of the total
first year commissions paid by AmerUs Life.
 
     Career agents are also independent contractors and are primarily
compensated by commissions on first year and renewal premiums collected on
business written by them. In addition, career agents can earn bonus commissions,
graded by production and persistency on their business.
 
     AmerUs Life also sells its products through a network of approximately
1,900 insurance brokers in all jurisdictions in which AmerUs Life is licensed to
sell insurance. Brokers are independent contractors who sell a variety of
insurance products issued by various companies. Brokers operate through the
career general agency system but are compensated under a commission structure
which is separate from those used for career agents and in the PPGA system.
 
     PERSONAL PRODUCING GENERAL AGENCY SYSTEM.  Under the PPGA system, AmerUs
Life contracts primarily with individuals who are experienced individual agents
or head a small group of experienced individual agents. These individuals are
independent contractors and are responsible for all of their own expenses. These
individuals often sell products for other insurance companies, and may offer
selected products of AmerUs Life rather than AmerUs Life's full line of
insurance products. The PPGA system is comprised of approximately 425 PPGA's,
with approximately 1,100 agents.
 
     PPGA's are compensated by commissions on first year and renewal premiums
collected on business written by themselves and the agents in their units. In
addition to a base commission, PPGA's may earn bonus commissions on their
business, graded by production and persistency.
 
     DELTA
 
     Delta's annuity products are sold through independent agents who are
supervised by regional vice presidents and regional directors with specified
geographic supervisory responsibilities. The regional vice presidents and
regional directors are primarily responsible for recruiting agents and providing
marketing support to those agents in an effort to promote Delta's products. The
regional vice presidents' and regional directors' marketing support activities
include informational mailings, seminars, and case consultations, all of which
are designed to educate agents about annuities in general and Delta in
particular. Regional vice presidents and regional directors are paid a base
salary plus incentive compensation based on the business produced by agents
within their territory. There are currently ten regional vice presidents and
regional directors.
 
     The regional vice presidents and regional directors are responsible for
over 3,300 licensed, independent agents, who may also sell insurance products
for other companies. Of these agents, approximately 1,400 wrote annuity business
for Delta in 1997. No single agent was responsible for more than 1.6% of Delta's
1997 annuity premiums. No significant amount of Delta's business is produced by
stock brokerage firms, banks or large national insurance brokerage agencies.
 
     AMVESTORS
 
     AmVestors endeavors to attract agents to sell its products by offering a
broad selection of fixed annuity products and by providing timely, comprehensive
services to agents and customers. AmVestors markets its products through
independent agents. AmVestors currently has approximately 7,800 independent
agents licensed to sell its products. AmVestors also maintains contact with
approximately 50,000 agents that are not currently licensed, but have either
sold the AmVestors' annuities in the past or have expressed an interest in doing
so. These agents continue to receive periodic mailings related to interest rate
and commission changes, and new product introductions, and are reappointed as
required in order to represent AmVestors in selling its products. However, in
order to save costs associated with reappointing agents, AmVestors does not
automatically relicense an agent that has not written business for twelve
months.
 
     No single agent accounted for more than 1.2% of American's annuity sales in
1997, and no single agent accounted for more than 3.0% of FBL's annuity sales in
1997. AmVestors does not have exclusive agency
 
                                       40
<PAGE>   112
 
agreements with its agents and management believes most of these agents sell
products for other insurance companies similar to those sold by American and
FBL.
 
INVESTMENT PORTFOLIO
 
     GENERAL
 
     The Company maintains a diversified portfolio of investments which is
supervised by an experienced in-house staff of investment professionals. The
Company employs sophisticated asset management techniques in order to achieve
competitive yields, while maintaining risk at acceptable levels. The asset
portfolio is segmented by liability type, with tailored investment strategies
for specific product lines. Investment policies and significant individual
investments are subject to approval by the Board of Directors of each of the
life insurance companies and are overseen by the Investment Committee of the
Board of Directors of the Company. Management regularly monitors individual
assets and asset groups, in addition to monitoring the overall asset mix. In
addition, the insurance company boards and the Investment Committee review
investment guidelines and monitor internal controls.
 
     INVESTMENT STRATEGY
 
     The Company's investment philosophy is to employ an integrated
asset-liability management approach with separate investment portfolios for
specific product lines, such as traditional life, universal life and annuities
to generate attractive risk-adjusted returns on capital. Essential to this
philosophy is coordinating investments in the investment portfolio with product
strategies, focusing on risk-adjusted returns and identifying and evaluating
associated business risks.
 
     The Company's asset-liability management approach utilizes separate
investment portfolios for specific product lines, such as traditional life,
universal life and annuities. Investment policies and strategies have been
established based on the specific characteristics of each product line. The
portfolio investment policies and strategies establish asset duration, quality
and other guidelines. The Company utilizes analytical systems to establish an
optimal asset mix for each line of business. The Company seeks to manage the
asset-liability mismatch and the associated interest rate risk through active
management of the investment portfolio. Financial, actuarial, investment,
product development and product marketing professionals work together throughout
the product development, introduction and management phases to jointly develop
and implement product features, initial and renewal crediting strategies, and
investment strategies based on extensive modeling of a variety of factors under
a number of interest rate scenarios.
 
     INVESTED ASSETS
 
     The Company maintains a diversified portfolio of investments, including
public and private fixed maturity securities, commercial mortgage loans and
equity real estate. The Company's objective is to maintain a high-quality,
diversified fixed maturity securities portfolio that produces a yield and total
return that supports the various product line liabilities and the Company's
earnings goals.
 
     FIXED MATURITY SECURITIES
 
     The fixed maturity securities portfolio consists primarily of investment
grade corporate fixed maturity securities, high-quality MBS and United States
government and agency obligations. As of December 31, 1997 fixed maturity
securities were $7,927.5 million, or 88.9% of the carrying value of invested
assets with public and private fixed maturity securities constituting $7,561.9
million, or 95.4%, and $365.6 million, or 4.6%, of total fixed maturity
securities, respectively.
 
     The Company's portfolio of investment grade fixed maturity securities is
diversified by number and type of issuer. As of December 31, 1997, investment
grade fixed maturity securities included the securities of over 1,055 issuers,
with 2,692 different issues of securities. No issuer represents more than 2.8%
of investment grade fixed maturity securities.
 
                                       41
<PAGE>   113
 
     Below-investment grade fixed maturity securities as of December 31, 1997
represented 4.6% of total invested assets, with the largest being a $10.6
million investment.
 
     As of December 31, 1997, 84.3% of total invested assets were investment
grade fixed maturity securities.
 
     Mortgage backed securities ("MBS") comprise a core position within the
Company's fixed maturity securities investments. MBS investments include
residential, commercial MBS, home equity loans (including home equity loans
purchased from one of the Company's affiliates), manufactured housing, FHA Title
I and CMBS. Residential mortgage pass-throughs and collateralized mortgage
obligations ("CMOs") total $2,794.9 million or 31.8% of total invested assets.
As of December 31, 1997, MBS were $3,450.3 million or 38.7%, of total invested
assets. MBS guaranteed by the United States government or an agency of the
United States government were $2,793.6 million, or 81.0% of MBS, and other MBS
were $656.7 million, or 19.0%, of MBS as of December 31, 1997. At December 31,
1997 the Company's MBS investment portfolio composition was approximately 54%
fixed rate pass-throughs backed by seasoned loan pools, 5% floating rate
pass-throughs and 41% CMOs with some form of explicit prepayment protection. The
Company has established specific investment guidelines for the management of
MBS. As a general policy, the Company does not invest in interest-only and
principal-only or other similar leveraged derivative mortgage instruments.
Management believes that the quality of assets in the MBS portfolio is generally
high, with 91.7% of such assets representing agency backed or "AAA" rated
securities.
 
     The Company uses interest rate swaps and caps to reduce its exposure to
changes in interest rates and to manage duration mismatches. Although the
Company is subject to the risk that counterparties will fail to perform, credit
standings of counterparties are monitored regularly. The Company's policy is to
contract only with counterparties that are rated "AA" or higher; accordingly, it
is expected that counterparties will be able to satisfy their obligations under
such contracts. The Company is also subject to the risk associated with changes
in the value of contracts. However, such adverse changes in value generally are
offset by changes in the value of the items being hedged. The notional principal
amounts of the swaps and caps, which represent the extent of the Company's
involvement in such contracts but not the risk of loss, at December 31, 1997,
amounted to $1,100.2 million. The swaps had no carrying value at December 31,
1997 and a fair value which amounted to a net payable position of $0.1 million
at December 31, 1997. The carrying value and fair value of interest rate caps
and swaptions amounted to $2.1 million and $2.0 million, respectively, and are
reflected as "other investments" on the Company's consolidated financial
statements as of December 31, 1997. The net amount payable or receivable from
interest rate swaps and caps is accrued as an adjustment to interest income.
 
     MORTGAGE LOANS
 
     As of December 31, 1997, mortgage loans in the Company's investment
portfolio were $462.5 million, or 5.2% of the aggregate carrying value of
invested assets, including the Closed Block. As of December 31, 1997, commercial
mortgage loans and residential mortgage loans comprised 96.4% and 3.6%,
respectively, of the mortgage loans in the Company's investment portfolio.
 
     Commercial mortgage loans consist primarily of fixed-rate mortgage loans.
As of December 31, 1997, the Company held 435 individual commercial mortgage
loans with an average balance of $1.1 million.
 
     As of December 31, 1997, only five loans aggregating $2.0 million, or 0.4%,
of the Company's loan portfolio (as measured by principal balance) were
classified as delinquent or in foreclosure. As of the same date, only $4.4
million, or 0.9%, of the Company's loan portfolio (as measured by principal
balance) was classified as restructured. During 1997, the Company had no
foreclosures.
 
     EQUITY REAL ESTATE
 
     In recent years the Company has significantly reduced its equity real
estate portfolio. As of December 31, 1997, the carrying value of investment real
estate, including the Closed Block, was $8.7 million.
 
                                       42
<PAGE>   114
 
     OTHER
 
     The Company held $286.2 million of policy loans on individual insurance and
annuity products as of December 31, 1997. Policy loans are permitted to the
extent of a policy's contractual limits and are fully collateralized by policy
cash values.
 
     As of December 31, 1997, the Company held equity securities of $61.5
million. The largest holding of equity securities, Federal Home Loan Bank, had a
carrying value of $28.1 million as of December 31, 1997.
 
     The Company held $172.0 million of other invested assets (including
short-term investments) on December 31, 1997. Other invested assets consist
primarily of various joint venture and limited partnership investments.
 
                         DESCRIPTION OF DEBT SECURITIES
 
     The Debt Securities offered hereby, consisting of notes, debentures and
other evidences of indebtedness, are to be issued in one or more series
constituting either senior Debt Securities ("Senior Debt Securities") or junior
subordinated Debt Securities ("Junior Subordinated Debt"). Unless otherwise
specified in the applicable Prospectus Supplement, the Debt Securities will be
issued pursuant to indentures described below (as applicable, the "Senior
Indenture" or the "Subordinated Indenture", each, an "Indenture" and, together,
the "Indentures"), in each case between the Company and the trustee identified
therein (each an "Indenture Trustee"), the forms of which have been filed as
exhibits to the Registration Statement of which this Prospectus forms a part.
Except as provided in the applicable Prospectus Supplement and except for the
subordination provisions of the Subordinated Indenture, for which there are no
counterparts in the Senior Indenture, the provisions of the Subordinated
Indenture are substantively identical to the provisions of the Senior Indenture
that bear the same section numbers.
 
     The statements herein relating to the Debt Securities and the following
summaries of certain general provisions of the Indentures do not purport to be
complete and are subject to, and are qualified in their entirety by reference
to, all the provisions of the Indentures (as they may be amended or supplemented
from time to time), including the definitions therein of certain terms
capitalized in this Prospectus. All article and section references appearing
herein are to articles and sections of the applicable Indenture and whenever
particular Sections or defined terms of the Indentures (as they may be amended
or supplemented from time to time) are referred to herein or in a Prospectus
Supplement, such Sections or defined terms are incorporated herein or therein by
reference.
 
     GENERAL
 
     The Debt Securities will be unsecured obligations of the Company. The
Indentures do not limit the aggregate amount of Debt Securities which may be
issued thereunder, nor do they limit the incurrence or issuance of other secured
or unsecured debt of the Company. The Debt Securities issued under the Senior
Indenture will be unsecured and will rank pari passu in right of payment with
all other unsecured and unsubordinated debt obligations of the Company. The Debt
Securities issued under the Subordinated Indenture will be subordinate and
junior in right of payment, to the extent and in the manner set forth in the
Subordinated Indenture, to all Senior Indebtedness of the Company. See "--
Subordination under the Subordinated Indenture."
 
     Reference is made to the applicable Prospectus Supplement which will
accompany this Prospectus for a description of the specific series of Debt
Securities being offered thereby, including, but not limited to, the following:
(1) the title of such Debt Securities, including whether the Debt Securities are
Senior Debt Securities or Junior Subordinated Debt and whether such Debt
Securities will be issued under the Senior Indenture, the Subordinated Indenture
or another indenture set forth in the Prospectus Supplement; (2) any limit upon
the aggregate principal amount of such Debt Securities; (3) the date or dates on
which the principal of and premium, if any, on such Debt Securities will mature
or the method of determining such date or dates; (4) the rate or rates (which
may be fixed or variable) at which such Debt Securities will bear interest, if
any, or the method of calculating such rate or rates; (5) the date or dates from
which interest, if any, will accrue or the method by which such date or dates
will be determined; (6) the date or dates on which
 
                                       43
<PAGE>   115
 
interest, if any, will be payable and the record date or dates therefor; (7) the
place or places where principal of, premium, if any, and interest, if any, on
such Debt Securities will be payable; (8) with respect to Junior Subordinated
Debt Securities, the right, if any, of the Company to defer payment of interest
on such Debt Securities, the maximum length of any such deferral period and any
related terms, conditions or covenants; (9) the period or periods within which,
the price or prices at which, the currency or currencies (including currency
unit or units) in which, and the terms and conditions upon which, such Debt
Securities may be redeemed, in whole or in part, at the option of the Company;
(10) the obligation, if any, of the Company to redeem or purchase such Debt
Securities pursuant to any sinking fund or analogous provisions or upon the
happening of a specified event and the period or periods within which, the price
or prices at which and the other terms and conditions upon which, such Debt
Securities shall be redeemed or purchased, in whole or in part, pursuant to such
obligations; (11) the denominations in which such Debt Securities are authorized
to be issued if other than $1,000 and any integral multiple thereof, in the case
of registered Debt Securities and if other than $5,000 and any integral multiple
thereof, in the case of bearer Debt Securities; (12) if other than Dollars, the
currency or currencies (including currency units) in which Debt Securities may
be denominated and/or the currency or currencies (including currency units) in
which principal of, premium, if any, and interest, if any, on such Debt
Securities will be payable and whether the Company or the holders of any such
Debt Securities may elect to receive payments in respect of such Debt Securities
in a currency or currency unit other than that in which such Debt Securities are
stated to be payable; (13) if other than the principal amount thereof, the
portion of the principal amount of such Debt Securities which will be payable
upon declaration of the acceleration of the maturity thereof or the method by
which such portion shall be determined; (14) the person to whom any interest on
any such Debt Security shall be payable if other than the person in whose name
such Debt Security is registered on the applicable record date; (15) any
addition to, or modification or deletion of, any Event of Default or any
covenant of the Company specified in the Indenture with respect to such Debt
Securities; (16) the application, if any, of such means of defeasance or
covenant defeasance as may be specified for such Debt Securities; (17) whether
such Debt Securities are to be issued in whole or in part in the form of one or
more temporary or permanent global securities and, if so, the identity of the
depositary for such global security or securities; (18) under what
circumstances, if any, the Company will pay additional amounts on the Debt
Securities of that series held by a Person who is not a U.S. Person in respect
of taxes or similar charges withheld or deducted ("Additional Amounts") and, if
so, whether the Company will have the option to redeem such Debt Securities
rather than pay such Additional Amounts (and the terms of any such option); (18)
if the amount of payments of principal of, premium, if any, and interest, if any
shall be determined by reference to an index, formula or other method, the
index, formula, or other method by which such amounts shall be determinable;
(19) if the principal amount payable at stated maturity will not be determinable
as of any one or more dates prior to the stated maturity, the amount which shall
be deemed to be the principal amount thereof as of any date for any purpose;
(20) whether such Debt Securities shall be Registered or Bearer or both and any
restrictions as to the offering, sale, delivery or exchange of Bearer
Securities; (21) the forms of the Debt Securities and coupons, if any; and (22)
any other special terms pertaining to such Debt Securities. Unless otherwise
specified in the applicable Prospectus Supplement, the Debt Securities will not
be listed on any securities exchange. (Section 3.01.)
 
     Unless otherwise specified in the applicable Prospectus Supplement, Debt
Securities will be issued in fully-registered form without coupons. Where Debt
Securities of any series are issued in bearer form, the special restrictions and
considerations, including special offering restrictions and special Federal
income tax considerations, applicable to any such Debt Securities and to payment
on and transfer and exchange of such Debt Securities will be described in the
applicable Prospectus Supplement. Bearer Debt Securities will be transferable by
delivery. (Section 3.05.)
 
     Debt Securities may be sold at a substantial discount below their stated
principal amount, bearing no interest or interest at a rate which at the time of
issuance is below market rates. Certain Federal income tax consequences and
special considerations applicable to any such Debt Securities, or to Debt
Securities issued at par that are treated as having been issued at a discount,
will be described in the applicable Prospectus Supplement.
 
                                       44
<PAGE>   116
 
     If the purchase price of any of the Debt Securities is payable in one or
more foreign currencies or currency units or if any Debt Securities are
denominated in one or more foreign currencies or currency units or if the
principal of, premium, if any, or interest, if any, on any Debt Securities is
payable in one or more foreign currencies or currency units, or by reference to
commodity prices, equity indices or other factors, the restrictions, elections,
certain Federal income tax considerations, specific terms and other information
with respect to such issue of Debt Securities and such foreign currency or
currency units or commodity prices, equity indices or other factors will be set
forth in the applicable Prospectus Supplement. In general, holders of such
series of Debt Securities may receive a principal amount on any principal
payment date, or a payment of premium, if any, on any premium interest payment
date or a payment of interest on any interest payment date, that is greater than
or less than the amount of principal, premium, if any, or interest otherwise
payable on such dates, depending on the value on such dates of the applicable
currency, commodity, equity index or other factor.
 
PAYMENT, REGISTRATION, TRANSFER AND EXCHANGE
 
     Unless otherwise provided in the applicable Prospectus Supplement, payments
in respect of the Debt Securities will be made in the designated currency at the
office or agency of the Company maintained for that purpose as the Company may
designate from time to time. (Section 9.02.) Unless otherwise indicated in the
applicable Prospectus Supplement, payment of any installment of interest on Debt
Securities in registered form will be made to the person in whose name such Debt
Security is registered at the close of business on the regular record date for
such interest. (Section 3.07 (a).)
 
     Payment in respect of Debt Securities in bearer form will be made in the
currency and in the manner designated in the applicable Prospectus Supplement,
subject to any applicable laws and regulations, at such paying agencies outside
the United States as the Company may appoint from time to time. The paying
agents outside the United States initially appointed by the Company for a series
of Debt Securities will be named in the Prospectus Supplement. The Company may
at any time designate additional paying agents or rescind the designation of any
paying agents, except that, if Debt Securities of a series are issuable as
Registered Securities, the Company will be required to maintain at least one
paying agent in each Place of Payment for such series and, if Debt Securities of
a series are issuable as Bearer Securities, the Company will be required to
maintain a paying agent in a Place of Payment outside the United States where
Debt Securities of such series and any coupons appertaining thereto may be
presented and surrendered for payment. (Section 9.02.)
 
     Unless otherwise provided in the applicable Prospectus Supplement, Debt
Securities in registered form will be transferable or exchangeable at the agency
of the Company maintained for such purpose as designated by the Company from
time to time. (Sections 3.05 and 9.02.) Debt Securities may be transferred or
exchanged without service charge, other than any tax or other governmental
charge imposed in connection therewith. (Section 3.05.)
 
GLOBAL DEBT SECURITIES
 
     Unless otherwise specified in the applicable Prospectus Supplement, the
Debt Securities of a series may be issued in whole or in part in the form of one
or more fully registered global securities (a "Registered Global Security") that
will be deposited with a depository (the "Depository") or with a nominee for the
Depository identified in the applicable Prospectus Supplement. In such a case,
one or more Registered Global Securities will be issued in a denomination or
aggregate denominations equal to the portion of the aggregate principal amount
of outstanding Debt Securities of the series to be represented by such
Registered Global Security or Securities. (Section 3.03.) Unless and until it is
exchanged in whole or in part for Debt Securities in definitive certificated
form, a Registered Global Security may not be registered for transfer or
exchange except as a whole by the Depository for such Registered Global Security
to a nominee of such Depository or by a nominee of such Depository to such
Depository or another nominee of such Depository or by such Depository or any
such nominee to a successor Depository for such series or a nominee of such
successor Depository and except in the circumstances described in the applicable
Prospectus Supplement. (Section 3.05.)
 
                                       45
<PAGE>   117
 
     The specific terms of the depository arrangement with respect to any
portion of a series of Debt Securities to be represented by a Registered Global
Security will be described in the applicable Prospectus Supplement. Unless
otherwise specified in the applicable Prospectus Supplement, the Company expects
that the following provisions will apply to such depository arrangements.
 
     Ownership of beneficial interests in a Registered Global Security will be
limited to participants or persons that may hold interests through participants
(as such term is defined below). Upon the issuance of any Registered Global
Security, and the deposit of such Registered Global Security with or on behalf
of the Depository for such Registered Global Security, the Depository will
credit, on its book-entry registration and transfer system, the respective
principal amounts of the Debt Securities represented by such Registered Global
Security to the accounts of institutions ("participants") that have accounts
with the Depository or its nominee. The accounts to be credited will be
designated by the underwriters or agents engaging in the distribution of such
Debt Securities or by the Company, if such Debt Securities are offered and sold
directly by the Company. Ownership of beneficial interests by participants in
such Registered Global Security will be shown on, and the transfer of such
beneficial interests will be effected only through, records maintained by the
Depository for such Registered Global Security or by its nominee. Ownership of
beneficial interests in such Registered Global Security by persons that hold
through participants will be shown on, and the transfer of such beneficial
interests within such participants will be effected only through, records
maintained by such participants. The laws of some jurisdictions require that
certain purchasers of securities take physical delivery of such securities in
certificated form. The foregoing limitations and such laws may impair the
ability to transfer beneficial interests in such Registered Global Security.
 
     So long as the Depository for a Registered Global Security, or its nominee,
is the registered owner of such Registered Global Security, such Depository or
such nominee, as the case may be, will be considered the sole owner or holder of
the Debt Securities represented by such Registered Global Security for all
purposes under the applicable Indenture. Unless otherwise specified in the
applicable Prospectus Supplement and except as specified below, owners of
beneficial interests in such Registered Global Security will not be entitled to
have Debt Securities of the series represented by such Registered Global
Security registered in their names, will not receive or be entitled to receive
physical delivery of Debt Securities of such series in certificated form and
will not be considered the holders thereof for any purposes under the relevant
Indenture. (Section 3.08.) Accordingly, each person owning a beneficial interest
in such Registered Global Security must rely on the procedures of the Depository
and, if such person is not a participant, on the procedures of the participant
through which such person owns its interest, to exercise any rights of a holder
under the relevant Indenture. The Depository may grant proxies and otherwise
authorize participants to give or take any request, demand, authorization,
direction, notice, consent, waiver or other action which a holder is entitled to
give or take under the relevant Indenture. The Company understands that, under
existing industry practices, if the Company requests any action of holders or if
any owner of a beneficial interest in such Registered Global Security desires to
give any notice or take any action which a holder is entitled to give or take
under the relevant Indenture, the Depository would authorize the participants to
give such notice or take such action, and such participants would authorize
beneficial owners owning through such participants to give such notice or take
such action or would otherwise act upon the instructions of beneficial owners
owning through them.
 
     Unless otherwise specified in the applicable Prospectus Supplement,
payments with respect to principal, premium, if any, and interest, if any, on
Debt Securities represented by a Registered Global Security registered in the
name of a Depository or its nominee will be made to such Depository or its
nominee, as the case may be, as the registered owner of such Registered Global
Security.
 
     The Company expects that the Depository for any Debt Securities represented
by a Registered Global Security, upon receipt of any payment of principal,
premium or interest, will immediately credit participants' accounts with
payments in amounts proportionate to their respective beneficial interests in
the principal amount of such Registered Global Security as shown on the records
of such Depository. The Company also expects that payments by participants to
owners of beneficial interests in such Registered Global Security held through
such participants will be governed by standing instructions and customary
practices, as is now the case with the securities held for the accounts of
customers registered in "street names," and will be the responsibility of such
participants. None of the Company, the respective Trustees or any agent of the
                                       46
<PAGE>   118
 
Company or the respective Trustees shall have any responsibility or liability
for any aspect of the records relating to or payments made on account of
beneficial interests of a Registered Global Security, or for maintaining,
supervising or reviewing any records relating to such beneficial interests.
(Section 3.08.)
 
     Unless otherwise specified in the applicable Prospectus Supplement, if the
Depository for any Debt Securities represented by a Registered Global Security
is at any time unwilling or unable to continue as Depository or ceases to be a
clearing agency registered under the Exchange Act and a duly registered
successor Depository is not appointed by the Company within 90 days, the Company
will issue such Debt Securities in definitive certificated form in exchange for
such Registered Global Security. In addition, the Company may at any time and in
its sole discretion determine not to have any of the Debt Securities of a series
represented by one or more Registered Global Securities and, in such event, will
issue Debt Securities of such series in definitive certificated form in exchange
for all of the Registered Global Security or Securities representing such Debt
Securities. (Section 3.05.)
 
     The Debt Securities of a series may also be issued in whole or in part in
the form of one or more bearer global securities (a "Bearer Global Security")
that will be deposited with a depository, or with a nominee for such depository,
identified in the applicable Prospectus Supplement. Any such Bearer Global
Security may be issued in temporary or permanent form. (Section 3.04.) The
specific terms and procedures, including the specific terms of the depository
arrangement, with respect to any portion of a series of Debt Securities to be
represented by one or more Bearer Global Securities will be described in the
applicable Prospectus Supplement.
 
CONSOLIDATION, MERGER OR SALE BY THE COMPANY
 
     Unless otherwise specified in the applicable Prospectus Supplement, the
Company shall not consolidate with or merge with or into any other corporation
or sell its assets substantially as an entirety, unless: (i) the corporation
formed by such consolidation or into which the Company is merged or the
corporation which acquires its assets is organized and existing under the laws
of the United States or any state thereof; (ii) the corporation formed by such
consolidation or into which the Company is merged or which acquires the
Company's assets substantially as an entirety expressly assumes by supplemental
indenture the due and punctual payment of the principal of, premium, if any, and
any Additional Amounts or interest on, the Debt Securities and the performance
or observance of every covenant of the Company under each Indenture and the Debt
Securities; (iii) immediately after giving effect to such transaction, and
treating any indebtedness which becomes an obligation of the Company or a
Subsidiary of the Company as a result of such transaction as having been
incurred by the Company or such Subsidiary at the time of such transaction, no
Default or Event of Default exists and is continuing; and (iv) if, as a result
of such transaction, properties or assets of the Company would become subject to
an encumbrance which would not be permitted by the terms of any series of Debt
Securities, the Company or the successor corporation, as the case may be, shall
take such steps as are necessary to secure such Debt Securities equally and
ratably with all indebtedness secured thereunder. Upon any such consolidation,
merger or sale, the successor corporation formed by such consolidation, or into
which the Company is merged or to which such sale is made, shall succeed to, and
be substituted for the Company under each Indenture. (Section 7.01.)
 
EVENTS OF DEFAULT, NOTICE AND CERTAIN RIGHTS ON DEFAULT
 
     Each Indenture provides that, if an Event of Default specified therein
occurs with respect to the Debt Securities of any series and is continuing, the
Trustee for such series or the holders of 25% in aggregate principal amount of
all of the outstanding Debt Securities of that series, by written notice to the
Company (and to the Trustee for such series, if notice is given by such holders
of Debt Securities), may declare the principal of (or, if the Debt Securities of
that series are Original Issue Discount Securities or Indexed Securities, such
portion of the principal amount specified in the Prospectus Supplement) and
accrued interest on all the Debt Securities of that series to be due and payable
(provided, with respect to any Debt Securities issued under the Subordinated
Indenture, that the payment of principal and interest on such Debt Securities
shall remain subordinated to the extent provided in the Subordinated Indenture).
(Section 5.02.)
 
                                       47
<PAGE>   119
 
     Unless otherwise specified in the applicable Prospectus Supplement, Events
of Default with respect to Debt Securities of any series are defined in each
Indenture as being: (a) default in payment of any interest on any Debt Security
of that series or any coupon appertaining thereto or any Additional Amount
payable with respect to Debt Securities of such series as specified in the
applicable Prospectus Supplement when the same becomes due and payable and the
same continues for 30 days; (b) default in payment of principal, or premium, if
any, at maturity or on redemption or otherwise, or in the making of a mandatory
sinking fund payment of any Debt Securities of that series when due; (c) default
continuing for 60 days after notice to the Company by the Indenture Trustee for
such series, or by the holders of 25% in aggregate principal amount of the Debt
Securities of such series then outstanding to the Company and the Indenture
Trustee, in the performance of any other agreement or covenant (other than an
agreement or covenant for which non-compliance is elsewhere specifically dealt
with in this paragraph) in the Debt Securities of that series, in the Indenture
or in any supplemental indenture or board resolution referred to therein under
which the Debt Securities of that series may have been issued; (d) a default
under any mortgage, agreement, indenture or instrument under which there may be
issued, or by which there may be evidenced any Debt of the Company, whether
existing now or in the future, in an aggregate principal amount then outstanding
of $25 million or more, which default (i) shall constitute a failure to pay any
portion of the principal of such Debt when due and payable after the expiration
of an applicable grace period with respect thereto or (ii) shall result in such
Debt becoming or being declared due and payable, and such acceleration shall not
be rescinded or annulled, or such Debt shall not be paid in full within a period
of 30 days after there has been given, to the Company by the Indenture Trustee
or to the Company and the Indenture Trustee by the holders of at least 25% in
aggregate principal amount of the Outstanding Debt Securities of such series
provided that such Event of Default will be remedied, cured or waived if the
default that resulted in the acceleration of such other indebtedness is
remedied, cured or waived; and (e) certain events of bankruptcy, insolvency or
reorganization of the Company. (Section 5.01.) The definition of "Event of
Default" in each Indenture specifically excludes a default under a secured debt
under which the obligee has recourse (exclusive of recourse for ancillary
matters such as environmental indemnities, misapplication of funds, costs of
enforcement, etc.) only to the collateral pledged for repayment, and where the
fair market value of such collateral does not exceed two percent of Total Assets
(as defined in the Indenture) at the time of the default. Events of Default with
respect to a specified series of Debt Securities may be added to the Indenture
and, if so added, will be described in the applicable Prospectus Supplement.
(Sections 3.01 and 5.01(7).)
 
     At any time after a declaration of acceleration has been made with respect
to Debt Securities of any series but before a judgment or decree for payment has
been obtained by the applicable Indenture Trustee, the Holders of a majority in
principal amount of Outstanding Debt Securities of that series may rescind any
declaration of acceleration and its consequences, provided that all payments due
(other than those due as a result of acceleration) have been made and all Events
of Default have been cured or waived. (Section 5.02)
 
     Each Indenture provides that the Indenture Trustee will, within 90 days
after the occurrence of a Default with respect to the Debt Securities of any
series, give to the holders of the Debt Securities of that series notice of all
Defaults known to it unless such Default shall have been cured or waived;
provided that except in the case of a Default in payment on the Debt Securities
of that series, the Indenture Trustee may withhold the notice if and so long as
a committee of its Responsible Officers in good faith determines that
withholding such notice is in the interests of the holders of the Debt
Securities of that series. (Section 6.06.) "Default" means any event which is,
or after notice or passage of time or both, would be, an Event of Default.
(Section 1.01.)
 
     Each Indenture provides that the holders of a majority in aggregate
principal amount of the Debt Securities of each series affected (with each such
series voting as a class) may, subject to certain limited conditions, direct the
time, method and place of conducting any proceeding for any remedy available to
the Indenture Trustee for such series, or exercising any trust or power
conferred on such Indenture Trustee. (Section 5.08.)
 
     Each Indenture includes a covenant that the Company will file annually with
the Indenture Trustee a certificate as to the Company's compliance with all
conditions and covenants of such Indenture. (Section 9.05.)
 
                                       48
<PAGE>   120
 
     The holders of a majority in aggregate principal amount of any series of
Debt Securities by notice to the Indenture Trustee for such series may waive, on
behalf of the holders of all Debt Securities of such series, any past Default or
Event of Default with respect to that series and its consequences except a
Default or Event of Default in the payment of the principal of, premium, if any,
or interest, if any, or any Additional Amounts on any Debt Security, and except
in respect of an Event of Default resulting from the breach of a covenant or
provision of either Indenture which, pursuant to the applicable Indenture,
cannot be amended or modified without the consent of the holders of each
outstanding Debt Security of such series affected. (Section 5.07.)
 
OPTION TO DEFER INTEREST PAYMENTS
 
     If provided in the applicable Prospectus Supplement, the Company shall have
the right at any time and from time to time during the term of any series of
Junior Subordinated Debt to defer the payment of interest on such series for
such number of consecutive interest payment periods as may be specified in the
applicable Prospectus Supplement (each, an "Extension Period"), subject to the
terms, conditions and covenants, if any, specified in such Prospectus
Supplement, provided that such Extension Period may not extend beyond the stated
maturity of such Junior Subordinated Debt. Certain material United States
Federal income tax consequences and special considerations applicable to any
such Junior Subordinated Debt will be described in the applicable Prospectus
Supplement.
 
     Unless otherwise specified in the applicable Prospectus Supplement, at the
end of such Extension Period, the Company shall pay all interest then accrued
and unpaid together with interest thereon compounded semiannually at the rate
specified for the Junior Subordinated Debt of such series to the extent
permitted by applicable law ("Compound Interest"); provided, that during any
such Extension Period, (a) the Company shall not declare or pay dividends on,
make distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock (other than (i)
purchases or acquisitions of Common Stock of the Company in connection with the
satisfaction by the Company of its obligations under any employee or agent
benefit plans or the satisfaction by the Company of its obligations pursuant to
any contract or security outstanding on the date of such event requiring the
Company to purchase Common Stock of the Company, (ii) as a result of a
reclassification of the Company's capital stock or the exchange or conversion of
one class or series of the Company's capital stock for another class or series
of the Company's capital stock, (iii) the purchase of fractional interests in
shares of the Company's capital stock pursuant to the conversion or exchange
provisions of such capital stock or the security being converted or exchanged,
(iv) dividends or distributions in Common Stock of the Company (or rights to
acquire capital stock) or repurchases or redemptions of capital stock solely
from the issuance or exchange of capital stock or (v) redemptions or repurchases
of any rights outstanding under a shareholder rights plan), (b) the Company
shall not make any payment of interest, principal or premium, if any, on or
repay, repurchase or redeem any debt securities issued by the Company that rank
pari passu in right of payment with or junior to the Junior Subordinated Debt of
such series, and (c) the Company shall not make any guarantee payments with
respect to the foregoing (other than payments pursuant to the Guarantee or the
Common Guarantee. Prior to the termination of any such Extension Period, the
Company may further defer payments of interest by extending the interest payment
period; provided, however, that, such Extension Period may not extend beyond the
maturity of the Junior Subordinated Debt of such series. Upon the termination of
any Extension Period and the payment of all amounts then due, the Company may
commence a new Extension Period, subject to the terms set forth in this section.
No interest during an Extension Period, except at the end thereof, shall be due
and payable, but the Company may prepay at any time all or any portion of the
interest accrued during an Extension Period. If the applicable Property Trustee
shall be the sole holder of the Junior Subordinated Debt of such series subject
to an Extension Period, the Company shall give the applicable Administrative
Trustee, the applicable Indenture Trustee and the applicable Property Trustee
notice of its selection of such Extension Period one Business Day prior to the
earlier of (i) the date distributions on the Capital Securities are payable or
(ii) the date the applicable Administrative Trustee is required to give notice
to the New York Stock Exchange (or other applicable self-regulatory
organization) or to holders of the Capital Securities of record or payment date
of such distribution. The applicable Administrative Trustee shall give notice of
the Company's selection of such Extension Period to the holders of the Capital
Securities. If the applicable Property Trustee shall not be the sole holder of
the Junior Subordinated Debt of such series subject to the Extension Period, the
                                       49
<PAGE>   121
 
Company shall give the holders of the Junior Subordinated Debt of such series
subject to the Extension Period notice of its selection of such Extension Period
ten Business Days prior to the earlier of (i) the Interest Payment Date for the
series of Junior Subordinated Debt subject to the Extension Period or (ii) the
date upon which the Company is required to give notice to the New York Stock
Exchange (or other applicable self-regulatory organization) or to holders of the
Junior Subordinated Debt of such series subject to the Extension Period of the
record or payment date of such related interest payment.
 
MODIFICATION OF THE INDENTURES
 
     Unless otherwise specified in the applicable Prospectus Supplement, each
Indenture contains provisions permitting the Company and the Indenture Trustee
to enter into one or more supplemental indentures without the consent of the
holders of any of the Debt Securities in order (i) to evidence the succession of
another corporation to the Company and the assumption of the covenants and
obligations of the Company under the Indenture and the Debt Securities by a
successor to the Company; (ii) to add to the covenants of the Company or
surrender any right or power of the Company; (iii) to add additional Events of
Default with respect to any series of Debt Securities; (iv) to add or change any
provisions to such extent as necessary to permit or facilitate the issuance of
Debt Securities in bearer form; (v) to change or eliminate any provision
affecting only Debt Securities not yet issued; (vi) to secure the Debt
Securities; (vii) to establish the form or terms of Debt Securities; (viii) to
evidence and provide for successor Indenture Trustees; (ix) if allowed without
penalty under applicable laws and regulations, to permit payment in respect of
Debt Securities in bearer form in the United States; (x) to correct any defect
or supplement any inconsistent provisions or to make any other provisions with
respect to matters or questions arising under such Indenture, provided that such
action does not adversely affect the interests of any holder of Debt Securities
of any series; or (xi) to cure any ambiguity or correct any mistake. The
Subordinated Indenture also permits the Company and the Indenture Trustee
thereunder to enter into such supplemental indentures to modify the
subordination provisions contained in the Subordinated Debenture except in a
manner adverse to any outstanding Debt Securities. (Section 8.01.)
 
     Unless otherwise specified in the applicable Prospectus Supplement, each
Indenture also contains provisions permitting the Company and the Indenture
Trustee, with the consent of the holders of a majority in aggregate principal
amount of the outstanding Debt Securities of each series affected by such
supplemental indenture (with the Debt Securities of each series voting as a
class), to execute supplemental indentures adding any provisions to or changing
or eliminating any of the provisions of such Indenture or any supplemental
indenture or modifying the rights of the holders of Debt Securities of such
series, except that, without the consent of the holder of each Debt Security so
affected, no such supplemental indenture may: (i) change the time for payment of
principal or premium, if any, or interest or any Additional Amounts on any Debt
Security; (ii) reduce the principal of, or any installment of principal of, or
premium, if any, or interest or any Additional Amounts on any Debt Security, or
change the manner in which the amount of any of the foregoing is determined;
(iii) reduce the amount of premium, if any, payable upon the redemption of any
Debt Security; (iv) reduce the amount of principal payable upon acceleration of
the maturity of any Original Issue Discount or Index Security; (v) change the
currency or currency unit in which any Debt Security or any premium or interest
or any Additional Amounts thereon is payable; (vi) impair the right to institute
suit for the enforcement of any payment on or with respect to any Debt Security;
(vii) reduce the percentage in principal amount of the outstanding Debt
Securities affected thereby the consent of whose holders is required for
modification or amendment of such Indenture or for waiver of compliance with
certain provisions of the Indenture or for waiver of certain defaults; (viii)
change the obligation of the Company to maintain an office or agency in the
places and for the purposes specified in such Indenture; (ix) modify the
provisions relating to the subordination of outstanding Debt Securities of any
series in a manner adverse to the holders thereof; or (x) modify the provisions
relating to waiver of certain defaults or any of the foregoing provisions.
(Section 8.02.)
 
SUBORDINATION UNDER THE SUBORDINATED INDENTURE
 
     The Subordinated Indenture provides that any Junior Subordinated Debt
issued thereunder are subordinate and junior in right of payment to all Senior
Indebtedness to the extent provided in the
 
                                       50
<PAGE>   122
 
Subordinated Indenture. (Section 12.01 of the Subordinated Indenture.) The
Subordinated Indenture defines the term "Senior Indebtedness" as: (i) all
indebtedness of the Company, whether outstanding on the date of the Subordinated
Indenture or thereafter created, incurred or assumed, which is for money
borrowed, or which is evidenced by a note or similar instrument given in
connection with the acquisition of any business, properties or assets, including
securities; (ii) any indebtedness of others of the kinds described in the
preceding clause (i) the payment of which the Company is responsible or liable
as guarantor or otherwise; and (iii) amendments, renewals, extensions and
refundings of any such indebtedness, unless in any instrument or instruments
evidencing or securing such indebtedness or pursuant to which the same is
outstanding, it is provided that such indebtedness is not senior in right of
payment to, or that such indebtedness is pari passu in right of payment with or
junior to, the Junior Subordinated Debt. The Senior Indebtedness shall continue
to be Senior Indebtedness and entitled to the benefits of the subordination
provisions irrespective of any amendment, modification or waiver of any term of
the Senior Indebtedness or extension or renewal of the Senior Indebtedness.
Senior Indebtedness does not include (A) any indebtedness of the Company to any
of its subsidiaries, (B) liabilities of the Company incurred in the ordinary
course of its business or (C) any indebtedness which by its terms is expressly
made pari passu in right of payment with or subordinated to the 8.85% Capital
Securities and the Guarantees. (Section 1.01 of the Subordinated Indenture.)
 
     In the event and during the continuation of (i) a Company default in the
payment of any principal, interest, if any or premium, if any, or any Additional
Amounts on any Senior Indebtedness when the same becomes due and payable,
whether at maturity or at a date fixed for prepayment or declaration or
otherwise or (ii) an event of default with respect to any Senior Indebtedness
permitting the holders thereof to accelerate the maturity thereof and written
notice of such event of default (requesting that payments on Junior Subordinated
Debt cease) is given to the Company by the holders of Senior Indebtedness, then
unless and until such default in payment or event of default shall have been
cured or waived or shall have ceased to exist, no direct or indirect payment (in
cash, property or securities, by set-off or otherwise) shall be made or agreed
to be made on account of the Junior Subordinated Debt or interest thereon or in
respect of any repayment, redemption, retirement, purchase or other acquisition
of Junior Subordinated Debt. (Section 12.03 of the Subordinated Indenture.)
 
     In the event of (i) any insolvency, bankruptcy, receivership, liquidation,
reorganization, readjustment, composition or other similar proceeding relating
to the Company or its property, (ii) any proceeding for the liquidation,
dissolution or other winding-up of the Company, voluntary or involuntary,
whether or not involving insolvency or bankruptcy proceedings, (iii) any
assignment by the Company for the benefit of creditors or (iv) any other
marshaling of the assets and liabilities of the Company, all Senior Indebtedness
(including, without limitations interest accruing after the commencement of any
such proceeding, assignment or marshaling of assets) shall first be paid in full
or provision must be made for such payment in cash or cash equivalents or
otherwise in a manner satisfactory to the holders of Senior Indebtedness before
any payment or distribution, whether in cash, securities or other property,
shall be made by the Company on account of Junior Subordinated Debt. In any such
event, any payment or distribution, whether in cash, securities or other
property (other than securities of the Company or any other corporation provided
for by a plan of reorganization or readjustment, the payment of which is
subordinate, at least to the extent provided in the subordination provisions of
the Subordinated Indenture with respect to the indebtedness evidenced by Junior
Subordinated Debt, to the payment of all Senior Indebtedness at the time
outstanding and to any securities issued in respect thereof under any such plan
of reorganization or readjustment), which would otherwise (but for the
subordination provisions) be payable or deliverable in respect of Junior
Subordinated Debt (including any such payment or distribution which may be
payable or deliverable by reason of the payment of any other indebtedness of the
Company being subordinated to the payment of Junior Subordinated Debt) shall be
paid or delivered directly to the holders of Senior Indebtedness, or to their
representative or trustee, in accordance with the priorities then existing among
such holders until all Senior Indebtedness shall have been paid in full.
(Section 12.02 of the Subordinated Indenture.) No present or future holder of
any Senior Indebtedness shall be prejudiced in the right to enforce
subordination of the indebtedness evidenced by Junior Subordinated Debt by any
act or failure to act on the part of the Company. (Section 12.11 of the
Subordinated Indenture.)
 
                                       51
<PAGE>   123
 
     Senior Indebtedness shall not be deemed to have been paid in full unless
the holders thereof shall have received cash, securities or other property equal
to the amount of such Senior Indebtedness then outstanding (Section 12.01 of the
Subordinated Indenture). Upon the payment in full of all Senior Indebtedness,
the holders of Junior Subordinated Debt shall be subrogated to all the rights of
any holders of Senior Indebtedness to receive any further payments or
distributions applicable to the Senior Indebtedness until all Junior
Subordinated Debt shall have been paid in full, and such payments or
distributions received by any holder of Junior Subordinated Debt, by reason of
such subrogation, of cash, securities or other property which otherwise would be
paid or distributed to the holders of Senior Indebtedness, shall, as between the
Company and its creditors other than the holders of Senior Indebtedness, on the
one hand, and the holders of Junior Subordinated Debt, on the other, be deemed
to be a payment by the Company on account of Senior Indebtedness, and not on
account of Junior Subordinated Debt. (Section 12.06 of the Subordinated
Indenture.)
 
     The Subordinated Indenture provides that the foregoing subordination
provisions, insofar as they relate to any particular issue of Junior
Subordinated Debt, may be changed prior to such issuance. Any such change would
be described in the applicable Prospectus Supplement relating to such Junior
Subordinated Debt.
 
DEFEASANCE AND COVENANT DEFEASANCE
 
     If indicated in the applicable Prospectus Supplement, the Company may elect
either (i) to defease and be discharged from any and all obligations with
respect to the Debt Securities of or within any series (except as otherwise
provided in the relevant Indenture) ("defeasance") or (ii) to be released from
its obligations with respect to certain covenants applicable to the Debt
Securities of or within any series ("covenant defeasance"), upon the deposit
with the relevant Indenture Trustee (or other qualifying trustee), in trust for
such purpose, of money and/or Government Obligations which through the payment
of principal, interest, premium, if any, and any Additional Amounts in
accordance with their terms will provide money in an amount sufficient, without
reinvestment, to pay the principal of, any premium or interest on and any
Additional Amounts on such Debt Securities and any coupons appertaining thereto
on the Maturity or redemption, as the case may be, and any mandatory sinking
fund or analogous payments thereon. As a condition to defeasance or covenant
defeasance, the Company must deliver to the Indenture Trustee an Opinion of
Counsel to the effect that the Holders of such Debt Securities will not
recognize income, gain or loss for Federal income tax purposes as a result of
such defeasance or covenant defeasance and will be subject to Federal income tax
on the same amounts and in the same manner and at the same times as would have
been the case if such defeasance or covenant defeasance had not occurred. Such
Opinion of Counsel, in the case of defeasance under clause (i) above, must refer
to and be based upon a ruling of the Internal Revenue Service or a change in
applicable Federal income tax law occurring after the date of the relevant
Indenture. (Article IV.) If indicated in the applicable Prospectus Supplement,
in addition to obligations of the United States or an agency or instrumentality
thereof, Government Obligations may include obligations of the government or an
agency or instrumentality of the government issuing the currency or currency
unit in which Debt Securities of such series are payable. (Section 3.01.)
 
     In addition, with respect to the Subordinated Indenture, in order to be
discharged no event or condition shall exist that, pursuant to certain
provisions described under "-- Subordination under the Subordinated Indenture"
above, would prevent the Company from making payments of principal of (and
premium, if any) and interest, if any, and any Additional Amounts on Junior
Subordinated Debt at the date of the irrevocable deposit referred to above.
(Section 4.06 of the Subordinated Indenture.)
 
     The Company may exercise its defeasance option with respect to such Debt
Securities notwithstanding its prior exercise of its covenant defeasance option.
If the Company exercises its defeasance option, payment of such Debt Securities
may not be accelerated because of a Default or an Event of Default. (Section
4.04.) If the Company exercises its covenant defeasance option, payment of such
Debt Securities may not be accelerated by reason of a Default or an Event of
Default with respect to the covenants to which such covenant defeasance is
applicable. However, if such acceleration were to occur by reason of another
Event of Default, the realizable value at the acceleration date of the money and
Government Obligations in the defeasance trust could be less than the principal
and interest then due on such Debt Securities, in that the
                                       52
<PAGE>   124
 
required deposit in the defeasance trust is based upon scheduled cash flow
rather than market value, which will vary depending upon interest rates and
other factors.
 
THE TRUSTEES
 
     Unless otherwise specified in the applicable Prospectus Supplement, First
Union Bank will be the Indenture Trustee under the Senior Indenture, and First
Union Bank will be the Indenture Trustee under the Subordinated Indenture. The
Company may also maintain banking and other commercial relationships with each
of the Trustees and their affiliates in the ordinary course of business.
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The following description does not purport to be complete and is qualified
in its entirety by reference to the Company's Articles of Incorporation and the
Company's By-laws.
 
GENERAL
 
     The Company is currently authorized to issue 75,000,000 shares of Class A
Common Stock, no par value, and 50,000,000 shares of Class B Common Stock, no
par value. On May 8, 1998, the Company's shareholders approved an amendment to
its Articles of Incorporation to increase the Company's authorized Class A
Common Stock from 75,000,000 shares to 180,000,000 shares. The Company will be
authorized to issue 180,000,000 shares of Class A Common Stock upon approval of
such amendment by the Iowa Commissioner of Insurance and the Iowa Attorney
General and upon filing such amendment with the Iowa Secretary of State. As of
December 31, 1997 there were 29,734,918 shares of Class A Common Stock
outstanding and 5,000,000 shares of Class B Common Stock outstanding, of which
12,380,300 of the Class A Common Stock and 5,000,000 of the Class B Common Stock
were held by AmerUs Group. In addition, 1,400,000 and 150,000 shares of Class A
Common Stock are reserved for issuance under options granted or available for
grant under the Stock Plan and Director Plan, respectively, and 5 million shares
of Class A Common Stock are reserved for issuance upon conversion of Class B
Common Stock. At its meeting on February 19, 1998 the Board of Directors
approved a resolution recommending that the Company solicit shareholder approval
to increase the authorized issuance of Class A Common Stock, no par value, from
75,000,000 to 180,000,000 shares. The Company intends to seek such approval at
its annual meeting of stockholders scheduled for May 8, 1998. The Company is
also authorized to issue 20 million shares of preferred stock on such terms as
determined by its Board of Directors (the "Preferred Stock"). See "-- Preferred
Stock."
 
     The Class B Common Stock (or any interest therein) may only be owned by
AMHC or a mutual insurance holding company or intermediate holding company which
is expressly authorized by applicable law to own or have a beneficial interest
in the Class B Common Stock (a "Permitted Class B Holder"). Under current Iowa
law, a Permitted Class B Holder must at all times possess the right to cast at
least a majority of the votes of the outstanding shares of the capital stock of
the Company.
 
     The Company's Articles of Incorporation provide that the number of
outstanding shares of Class A Common Stock (excluding shares of Class A Common
Stock owned by AMHC or another Permitted Class B Holder) shall exceed the number
of outstanding shares of Class B Common Stock plus the shares of Class A Common
Stock owned by AMHC or another Permitted Class B Holder only as authorized by
law and never by a ratio of more than three to one.
 
COMMON STOCK
 
     Each share of Class A Common Stock will entitle its holder to one vote per
share on all matters upon which shareholders are entitled to vote (including
election of directors, mergers, sales of assets, dissolution and amendments to
the Articles of Incorporation). Each share of Class B Common Stock will entitle
its holder to one vote per share on all such matters except that, if on the
record date for determining shares eligible to vote, the number of outstanding
shares of Class A Common Stock (excluding shares of Class A Common Stock owned
by a Permitted Class B Holder) and any outstanding shares of Preferred Stock
having voting rights, if
 
                                       53
<PAGE>   125
 
any (excluding shares of Preferred Stock owned by a Permitted Class B Holder),
equals or exceeds the number of outstanding shares of Class B Common Stock plus
the number of outstanding shares of Class A Common Stock owned by a Permitted
Class B Holder, the voting rights for each share of Class B Common Stock shall
be equal to the aggregate number of shares of Class A Common Stock (excluding
shares of Class A Common Stock owned by a Permitted Class B Holder) and
Preferred Stock having voting rights, if any, then outstanding (excluding shares
of Preferred Stock owned by a Permitted Class B Holder) plus one divided by the
number of outstanding shares of Class B Common Stock. Accordingly, even if the
number of outstanding shares of Class A Common Stock (excluding shares of Class
A Common Stock owned by a Permitted Class B Holder) exceeds the number of
outstanding shares of Class B Stock, the Permitted Class B Holder will always
have a majority of the votes.
 
     Both classes of Common Stock will generally vote together as a single class
on all matters; however, the holders of Class A Common Stock and the holders of
Class B Common Stock will vote separately as a class with respect to certain
matters for which class voting is required under Iowa law, including (i)
approval of proposed amendments to the Company's Articles of Incorporation that,
among other things, would alter the designation, rights, preferences or
limitations of all or part of the shares of their respective class, increase or
decrease the aggregate number of authorized shares of such class, effect an
exchange or reclassification or create a right of exchange of all or part of the
shares of one class into shares of another class, create a new class of shares
or increase the rights, preferences, or number of authorized shares of any
existing class so that it would have rights or preferences with respect to
distribution or to dissolution that are prior, superior, or substantially equal
to, the shares of such class, provided that the Class A Common Stock and Class B
Common Stock are not affected by such amendment in the same or a substantially
similar way; (ii) approval of a proposed plan of merger or consolidation if such
plan contains any provisions which, if contained in a proposed amendment to the
Articles of Incorporation, would entitle such class of shares to vote as a class
(with certain limited exceptions for shareholders of the surviving corporation);
and (iii) approval of a plan of share exchange (to be voted upon by each class
included in the exchange).
 
     There is no provision in the Company's Articles of Incorporation permitting
cumulative voting in the election of directors.
 
     No cash dividends may be declared in any fiscal year on the Class B Common
Stock until and unless a cash dividend has been declared on the Class A Common
Stock. Any cash dividends will be declared and paid equally on both classes of
Common Stock.
 
     The classes of Common Stock will rank equally and have equal rights with
respect to distributions and all other rights, including distributions upon
liquidation of the Company. However, in the case of dividends or other
distributions payable on the Common Stock in shares of such stock, including
distributions pursuant to stock splits or stock dividends, only Class A Common
Stock will be distributed with respect to Class A Common Stock and only Class B
Common Stock will be distributed with respect to Class B Common Stock. In no
event will either class of Common Stock be split, divided or combined unless the
other is split, divided or combined equally.
 
     So long as the number of outstanding shares of Class A Common Stock
(excluding shares of Class A Common Stock owned by a Permitted Class B Holder)
shall exceed the number of outstanding shares of Class B Common Stock plus the
outstanding shares of Class A Common Stock owned by AMHC or another Permitted
Class B Holder only as authorized by law and never by a ratio of more than three
to one, the Class B Common Stock will be convertible at all times into Class A
Common Stock on a share-for-share basis by surrender of certificates to the
transfer agent for the Company. Such conversion will be without cost to the
shareholder, except for any transfer taxes which may be payable if certificates
for Class A Common Stock are issued in a name other than the one in which the
surrendered certificate is registered. Therefore, shareholders who subsequently
desire to sell some or all of their shares of Class B Common Stock may convert
those shares into an equal number of shares of Class A Common Stock and sell the
shares of Class A Common Stock in the public market. The Company will be
required to reserve shares of Class A Common Stock sufficient for issuance upon
conversion of Class B Common Stock. All shares of Class B Common Stock
surrendered upon conversion will have the status of authorized but unissued
shares of Class B Common Stock.
 
                                       54
<PAGE>   126
 
     The Articles of Incorporation provide that a Permitted Class B Holder has
the preemptive right to purchase Common Stock to the extent necessary to
maintain the ratio of Class A Common Stock to Class B Common Stock set forth in
the preceding paragraph. The Amended and Restated Intercompany Agreement dated
as of December 1, 1996 among AMHC, AmerUs Group and the Company also affords the
AmerUs Affiliated Group certain equity purchase rights.
 
     In the event that AMHC (or any successor mutual insurance holding company)
is demutualized and is converted into a stock company pursuant to Iowa law, then
immediately upon such conversion each share of the Class B Common Stock shall
automatically be converted into one share of Class A Common Stock. AMHC has no
present plans to demutualize.
 
     A Permitted Class B Holder may pledge, subject to a security interest or
lien, encumber, or otherwise hypothecate shares of Class B Common Stock in
excess of the number of shares of Class B Common Stock which carry the right to
cast at least a majority of the votes of the outstanding shares of capital stock
of the Company having voting rights. However, except for a transfer to a
Permitted Class B Holder, a conversion of Class B Common Stock into Class A
Common Stock and except as described in the preceding sentence, no shares of
Class B Common Stock may be conveyed, pledged or otherwise transferred. Any
conveyance, transfer, assignment, pledge, security interest, lien, encumbrance
or hypothecation or alienation by AMHC or any intermediate holding company, in
or on the majority of the voting shares of AmerUs Life shall be deemed void in
inverse chronological order from the date of such transaction to the extent
necessary to give AMHC unencumbered direct or indirect ownership of a majority
of such voting shares.
 
     All shares of Common Stock offered hereby, or issuable upon conversion,
exchange or exercise of Securities, will, when issued, be fully paid and
non-assessable. The Class A Common Stock is listed on the New York Stock
Exchange under the symbol "AMH."
 
     The Prospectus Supplement relating to an offering of Common Stock will
describe terms relevant thereto, including the number of shares offered, the
initial offering price, market price and dividend information.
 
PREFERRED STOCK
 
     The Board of Directors of the Company is authorized, subject to any
limitations prescribed by law, from time to time to issue up to an aggregate of
20 million shares of Preferred Stock in one or more series, each of such series
to have such voting powers, full or limited, or no voting powers, and such
designations, preferences and relative, participating, optional or other special
rights, and such qualifications, limitations or restrictions thereof, as shall
be determined by the Board of Directors in a resolution or resolutions providing
for the issue of such Preferred Stock and as shall be described in the
Prospectus Supplement relating to a particular series of Preferred Stock offered
thereby; provided, however, that no Preferred Stock may have more than one vote
per share. Thus, any series may, if so determined by the Board of Directors,
have full voting rights with the Class A Common Stock or superior or limited
voting rights, be convertible into Class A Common Stock or another security of
the Company, and have such other relative rights, preferences and limitations as
the Company's Board of Directors shall determine; provided, however, that no
Preferred Stock may have more than one vote per share.
 
     The applicable Prospectus Supplement will describe the following terms of
any series of Preferred Stock in respect of which this Prospectus is being
delivered (to the extent applicable to such Preferred Stock): (i) the specific
designation, number of shares, seniority and initial public offering or purchase
price; (ii) any liquidation preference per share; (iii) any date of maturity;
(iv) any redemption, repayment or sinking fund provisions; (v) any dividend rate
or rates and the dates on which any such dividends will be payable (or the
method by which such rates or dates will be determined) and whether such
dividends will be cumulative or non-cumulative; (vi) any voting rights (which
may not exceed one vote per share); (vii) if other than the currency of the
United States of America, the currency or currencies, including currency units
and composite currencies, in which such Preferred Stock is denominated and/or in
which payments will or may be payable; (viii) the method by which amounts in
respect of such Preferred Stock may be calculated and any commodities,
currencies or indices, or value, rate or price, relevant to such calculation;
(ix) whether the
                                       55
<PAGE>   127
 
Preferred Stock is convertible or exchangeable and, if so, the securities or
rights into which such Preferred Stock is convertible or exchangeable (which may
include other Preferred Stock, Debt Securities, Common Stock or other securities
or rights of the Company (including rights to receive payment in cash or
securities based on the value, rate or price of one or more specified
commodities, currencies or indices) or a combination of the foregoing), and the
terms and conditions upon which such conversions or exchanges will be effected,
including the initial conversion or exchange prices or rates, the conversion or
exchange period and any other related provisions; (x) the place or places where
dividends and other payments on the Preferred Stock will be payable; and (xi)
any additional voting, dividend, liquidation, redemption and other rights,
preferences, privileges, limitations and restrictions.
 
     As described under "Description of Depositary Shares", the Company may, at
its option, elect to offer Depositary Shares evidenced by depositary receipts
("Depositary Receipts"), each representing an interest (to be specified in the
applicable Prospectus Supplement relating to the particular series of the
Preferred Stock) in a share of the particular series of the Preferred Stock
issued and deposited with a Preferred Stock Depositary (as defined herein) in
lieu of offering full shares of such series of Preferred Stock.
 
     All shares of Preferred Stock offered hereby, or issuable upon conversion,
exchange or exercise of Securities, will, when issued, be fully paid and
non-assessable.
 
CAPITAL SECURITIES OF AMERUS CAPITAL I
 
     AmerUs Capital I, a Delaware business trust and a wholly-owned subsidiary
of the Company, issued $86 million of 8.85% Capital Securities (the "8.85%
Capital Securities") in 1997 as part of the Company's financing plan. The assets
of such trust are invested in Subordinated Debt Securities of the Company, which
debt securities have a stated maturity of thirty years from their date of
issuance. If the Company redeems all or a portion of the Subordinated Debt
Securities, AmerUs Capital I must redeem a corresponding amount of the 8.85%
Capital Securities.
 
CERTAIN PROVISIONS OF THE ARTICLES OF INCORPORATION AND BY-LAWS OF THE COMPANY
 
     The following discussion is a summary of certain provisions of the Articles
of Incorporation and By-laws of the Company relating to shareholder voting
rights, advance notice requirements and other provisions which may be deemed to
have an "anti-takeover" effect. In addition to these provisions, regulatory
restrictions on dispositions of Common Stock by the Company's parent corporation
as well as the inability of the holders of the Class A Common Stock to elect a
majority of the Company's Board of Directors may also deter attempts to effect,
or prevent the consummation of, a change in control of the Company. See
"Description of Capital Stock -- Common Stock." These and other provisions
affect shareholder rights and should be given careful attention. The following
description of certain of these provisions is necessarily general and is
qualified in its entirety by reference to the Company's Articles of
Incorporation and By-laws, copies of which are included as exhibits to the
Registration Statement of which this Prospectus is a part.
 
     ISSUANCE OF CLASS A COMMON STOCK, PREFERRED STOCK AND OTHER RIGHTS
 
     The Company believes that its ability to issue, by action of a majority of
the Company's entire Board of Directors, and without shareholder consent, the
authorized but unissued shares of Class A Common Stock, shares of Preferred
Stock and other rights will provide the Company with the flexibility necessary
to meet its future needs without experiencing the time delay of having to seek
shareholder approval. Unissued shares of Class A Common Stock and Preferred
Stock will be issuable from time to time for any corporate purpose, including,
without limitation, stock splits, stock dividends, employee benefit and
compensation plans, acquisition and public or private sales for cash as a means
of raising capital. It is possible that the Company's Board of Directors might
use its authority (subject to the restrictions referred to above) to issue Class
A Common Stock, Preferred Stock or other rights in a way that could deter or
impede the completion of a tender offer or other attempt to gain control of the
Company of which the Company's Board of Directors does not approve. The Company
does not have any predetermined plans or commitments to use its authority to
effect
 
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<PAGE>   128
 
any such issuance, but reserves the right to take any action in the future which
the Company's Board of Directors deems to be in the best interests of the
shareholders and the Company under the circumstances.
 
     It is not possible to state the actual effect of any issuance of Preferred
Stock upon the rights of holders of Class A Common Stock because the Company's
Board of Directors has not determined any issuance price or prices, terms or
rights relating to Preferred Stock. However, such effects might include (i)
restrictions on Class A Common Stock dividends if Preferred Stock dividends have
not been paid; (ii) dilution of the voting power and equity interest of existing
holders of Class A Common Stock to the extent that any Preferred Stock series
has voting rights or would acquire voting rights upon the occurrence of certain
events (such as the failure to pay dividends for a specified period) or that any
Preferred Stock series is convertible into Class A Common Stock; and (iii)
current holders of Class A Common Stock not being entitled to share in the
Company's assets upon liquidation, dissolution or winding-up until satisfaction
of any liquidation preferences granted to any series of Preferred Stock.
 
     BOARD OF DIRECTORS
 
     The Articles of Incorporation provide that the number of Company directors
will be determined pursuant to the By-laws, but will not be less than seven or
more than 21 directors (subject to the rights of the holders of any series of
Preferred Stock). The By-laws provide that the exact number of directors will be
determined from time to time by the affirmative vote of a majority of the
Company's entire Board of Directors. At any meeting of the Company's Board of
Directors, a majority of the Company's entire Board of Directors will constitute
a quorum for the transaction of business, and subject to certain exceptions, at
any meeting at which a quorum is present the affirmative vote of a majority of
the directors present will constitute the act of the Company's Board of
Directors. The Company's Board of Directors is divided into three classes,
designated Classes I, II and III, which must be as nearly equal in number as
possible. Directors of Class I hold office for a term expiring at the annual
meeting of shareholders to be held in 2000, directors of Class II hold office
for a term expiring at the annual meeting of shareholders to be held in 1998 and
directors of Class III hold office for a term expiring at the annual meeting of
shareholders to be held in 1999. At each annual meeting of shareholders
following such initial classification and election, the respective successors of
each class shall be elected for three-year terms, and each director will hold
office until such annual meeting and until his or her successor is elected and
qualified, unless the director dies, resigns, is disqualified or is removed from
office. Thus, approximately two-thirds of the members of the Board of Directors
at any time will have had prior board experience. With such a staggered Board of
Directors, at least two annual meetings will normally be required to effect a
change in the composition of a majority of the Board of Directors.
 
     Under the Iowa Business Corporation Act (the "IBCA") and the Company's
Articles of Incorporation, and subject to the rights of the holders of any
series of Preferred Stock, a majority of the Board of Directors though less than
a quorum, or the sole remaining director, may fill vacancies on the Board of
Directors or newly created directorships resulting from any increase in the
authorized number of directors. The Articles of Incorporation provide that the
election of directors need not be by written ballot unless the By-laws so
provide. The By-laws do not require the use of such a written ballot. The
By-laws provide that the holders of a majority of shares then entitled to vote
if an election of directors were held may remove any director or the entire
Board of Directors, with or without cause.
 
     LIMITATIONS ON CALLING SPECIAL MEETINGS OF SHAREHOLDERS
 
     Under Iowa law, special meetings of shareholders may be called by the Board
of Directors or by such other persons as may be authorized by the articles of
incorporation or the by-laws. In the case of the Company, the By-laws provide
that special meetings may be called by the Chairman, the President, the
Company's Board of Directors pursuant to a resolution adopted by not less than a
majority of the total number of directors or at the request of the holders of
not less than 10% of the combined voting power of the then outstanding stock of
the Company entitled to vote generally in the election of directors. The notice
for a special meeting must set forth the purpose or purposes of the meeting and,
except as otherwise required by law or the Articles of Incorporation, no
business will be transacted at any special meeting of shareholders other than
the items of business stated in the notice.
                                       57
<PAGE>   129
 
     ADVANCE NOTICE REQUIREMENTS
 
     The By-laws establish advance notice procedures with regard to (i) the
nomination, other than by or at the direction of the Company's Board of
Directors, of candidates for election to the Company's Board of Directors (the
"Nomination Provision") and (ii) certain business to be brought before an annual
meeting of shareholders of the Company (the "Business Provision").
 
     The Nomination Provision, by requiring advance notice of nominations by
shareholders, affords the Company's Board of Directors a meaningful opportunity
to consider the qualifications of the proposed nominees and, to the extent
deemed necessary or desirable by the Company's Board of Directors, to inform
shareholders about such qualifications.
 
     The Business Provision, by requiring advance notice of business proposed to
be brought before an annual meeting, provides a more orderly procedure for
conducting annual meetings of shareholders and provides the Company's Board of
Directors with a meaningful opportunity prior to the meeting to inform
shareholders, to the extent deemed necessary or desirable by the Company's Board
of Directors, of any business proposed to be conducted at such meeting, together
with any recommendation of the Company's Board of Directors. The Business
Provision does not affect the right of shareholders to make shareholder
proposals for inclusion in proxy statements for the Company's annual meetings of
shareholders pursuant to the rules of the Commission. In addition, neither the
Nomination Provision nor the Business Provision will prevent any shareholder or
shareholders holding at least 10% of the shares entitled to vote on a particular
matter from requesting a special meeting with respect to such matter as
described above in "-- Limitations on Calling Special Meetings of Shareholders."
 
     Although these By-law provisions do not give the Company's Board of
Directors any power to approve or disapprove of shareholder nominations for the
election of directors or of any other business desired by shareholders to be
conducted at an annual meeting, they may make it difficult for a third party to
conduct a solicitation of proxies to elect its own slate of directors or
otherwise attempt to obtain control of the Company, even if such a solicitation
or attempt might be beneficial to the Company and its shareholders.
 
     AMENDMENT OF ARTICLES OF INCORPORATION AND BY-LAWS
 
     Except to the extent the Articles of Incorporation or By-laws otherwise
provide, the Company's Board of Directors may, upon the affirmative vote of a
majority of the entire Board, amend or repeal any By-law. The Articles of
Incorporation may be amended with the affirmative vote of the holders of a
majority of the outstanding voting securities of the Company having the right to
vote generally in the election of directors; provided, that any proposed
amendment to the Articles of Incorporation which would alter the provision
relating to the ratio of outstanding shares of Class A Common Stock to
outstanding shares of Class B Common Stock would require the approval of a
majority of the outstanding shares of Class A Common Stock and Class B Common
Stock and a majority of the outstanding shares of Class A Common Stock
(excluding shares owned by the Permitted Class B Holders). Under Iowa law,
certain proposed amendments to the Articles of Incorporation which adversely
affect the rights of a particular class of stock must be approved by a majority
of such class.
 
     STATE STATUTORY PROVISIONS
 
     Any merger or acquisition of the Company by another entity or the
acquisition or attempted acquisition of more than 10% of the stock of the
Company is subject to regulatory approval by the Iowa Commissioner.
 
     Section 490.1108 of the IBCA provides that in considering acquisition
proposals, directors may consider, in addition to the consideration of the
effects of any action on shareholders, the effects on the Company's employees,
suppliers, creditors, customers and the communities in which it operates, as
well as the long-term and short-term interests of the Company. Consideration of
any or all community interest factors is not a violation of the business
judgment rule, even if the directors reasonably determine that effects on a
community or other factors outweigh the financial or other benefits to the
Company or a shareholder or group of shareholders. Section 490.624A of the IBCA
also includes authorization of "poison pills" which include,
 
                                       58
<PAGE>   130
 
without limitation, terms and conditions of stock rights or options issued by a
corporation that preclude or limit the exercise, transfer or receipt of stock
rights by persons owning or offering to acquire a specified number or percentage
of a corporation's outstanding shares. Unlike most states, Iowa does not
presently have a "business combination" law prohibiting business combinations
with a shareholder who holds over a specified percentage of stock for less than
a specified period after crossing the threshold.
 
     The foregoing provisions of state law could have the effect of delaying,
deferring or preventing a change in control of the Company if the Board of
Directors determines that a change of control is not in the best interests of
the Company, its shareholders and other constituencies. In addition, the
regulatory restrictions on the acquisition of securities of the Company may also
deter attempts to effect, or prevent the consummation of, a change in control of
the Company.
 
     Certain provisions of the Articles of Incorporation and the By-laws may
make it more difficult to effect a change in control of the Company if the Board
of Directors determines that such action would not be in the best interests of
the shareholders. It could be argued, contrary to the belief of the Board of
Directors, that such provisions are not in the best interests of the
shareholders to the extent that they will have the effect of tending to
discourage possible takeover bids, which might be at prices involving a premium
over then recent market quotations for the Common Stock. The most important of
those provisions are described below.
 
     The Articles of Incorporation authorize the establishment of a classified
Board of Directors pursuant to the By-laws. The By-laws, in turn, provide that
the Directors serve staggered three-year terms, with the members of only one
class being elected in any year. A classified Board of Directors may increase
the difficulty of removing incumbent directors, providing such directors with
enhanced ability to retain their positions. A classified Board of Directors may
also make the acquisition of control of the Company by a third party by means of
a proxy contest more difficult. In addition, the classification may make it more
difficult to replace a majority of directors for business reasons unrelated to a
change in control.
 
     As discussed above, Preferred Stock may be issued from time to time in one
or more series with such rights, preferences, limitations and restrictions as
may be determined by the Board of Directors. The issuance of Preferred Stock
could be used, under certain circumstances, as a method of delaying or
preventing a change of control of the Company and could have a detrimental
effect on the rights of holders of Common Stock, including loss of voting
control.
 
     The provisions of the Articles of Incorporation regarding the classified
Board of Directors and certain business combination transactions may not be
amended without the affirmative approval of holders of not less than 80% of the
outstanding voting stock of the Company.
 
     The By-laws may be amended by majority vote of the Board of Directors.
 
                            DESCRIPTION OF WARRANTS
 
     The Company may issue Warrants to purchase Debt Securities, Preferred
Stock, Common Stock or any combination thereof, and such Warrants may be issued
independently or together with any such Securities and may be attached to or
separate from such Securities. Each series of Warrants will be issued under a
separate warrant agreement (each a "Warrant Agreement") to be entered into
between the Company and a warrant agent ("Warrant Agent"). The Warrant Agent
will act solely as an agent of the Company in connection with the Warrants of
each such series and will not assume any obligation or relationship of agency
for or with holders or beneficial owners of Warrants. The following sets forth
certain general terms and provisions of the Warrants offered hereby. Further
terms of the Warrants and the applicable Warrant Agreement will be set forth in
the applicable Prospectus Supplement.
 
     The applicable Prospectus Supplement will describe the terms of any series
of Warrants in respect of which this Prospectus is being delivered, including
the following: (i) the title of such Warrants; (ii) the aggregate number of such
Warrants; (iii) the price or prices at which such Warrants will be issued; (iv)
the currency or currencies, including currency units or composite currencies, in
which the price of such Warrants may be payable; (v) the designation and terms
of the Securities (other than Capital Securities and Common
 
                                       59
<PAGE>   131
 
Securities) purchasable upon exercise of such Warrants; (vi) the price at which
and the currency or currencies, including currency units or composite
currencies, in which the Securities (other than Capital Securities and Common
Securities) purchasable upon exercise of such Warrants may be purchased; (vii)
the date on which the right to exercise such Warrants shall commence and the
date on which such right shall expire; (viii) whether such Warrants will be
issued in registered form or bearer form; (ix) if applicable, the minimum or
maximum amount of such Warrants which may be exercised at any one time; (x) if
applicable, the designation and terms of the Securities (other than Capital
Securities and Common Securities) with which such Warrants are issued and the
number of such Warrants issued with each such Security; (xi) if applicable, the
date on and after which such Warrants and the related Securities (other than
Capital Securities and Common Securities) will be separately transferable; (xii)
information with respect to book-entry procedures, if any; (xiii) if applicable,
a discussion of certain United States Federal income tax considerations; and
(xiv) any other terms of such Warrants, including terms, procedures and
limitations relating to the exchange and exercise of such Warrants.
 
             DESCRIPTION OF CAPITAL SECURITIES OF THE AMERUS TRUSTS
 
     Each AmerUs Trust may issue, from time to time, only one series of Capital
Securities having terms described in the Prospectus Supplement relating thereto.
The Declaration of each AmerUs Trust will authorize the Administrative Trustees
of such AmerUs Trust to issue on behalf of such AmerUs Trust one series of
Capital Securities. Each Declaration will be qualified as an indenture under the
Trust Indenture Act. The Property Trustee, an independent trustee, will act as
indenture trustee for the Capital Securities for purposes of compliance with the
provisions of the Trust Indenture Act. The Capital Securities will have such
terms, including distributions, redemption, voting, liquidation rights and such
other preferred, deferred or other special rights or such restrictions as shall
be established by the Administrative Trustees in accordance with the applicable
Declaration or as shall be set forth in the Declaration or made part of the
Declaration by the Trust Indenture Act. Reference is made to any Prospectus
Supplement relating to the Capital Securities of an AmerUs Trust for specific
terms of the Capital Securities, including, to the extent applicable, (i) the
distinctive designation of such Capital Securities, (ii) the number of Capital
Securities issued by such AmerUs Trust, (iii) the annual distribution rate (or
method of determining such rate) for Capital Securities issued by such AmerUs
Trust and the date or dates upon which such distributions shall be payable
(provided, however, that distributions on such Capital Securities shall, subject
to any deferral provisions, and any provisions for payment of defaulted
distributions, be payable on a quarterly basis to holders of such Capital
Securities as of a record date in each quarter during which such Capital
Securities are outstanding), (iv) any right of such AmerUs Trust to defer
quarterly distributions on the Capital Securities as a result of an interest
deferral right exercised by the Company on any Junior Subordinated Debt held by
such AmerUs Trust, (v) whether distributions on Capital Securities shall be
cumulative, and, in the case of Capital Securities having such cumulative
distribution rights, the date or dates or method of determining the date or
dates from which distributions on Capital Securities shall be cumulative, (vi)
the amount or amounts which shall be paid out of the assets of such AmerUs Trust
to the holders of Capital Securities upon voluntary or involuntary dissolution,
winding-up or termination of such AmerUs Trust, (vii) the obligation or option,
if any, of such AmerUs Trust to purchase or redeem Capital Securities and the
price or prices at which, the period or periods within which and the terms and
conditions upon which Capital Securities shall be purchased or redeemed, in
whole or in part, pursuant to such obligation or option with such redemption
price to be specified in the applicable Prospectus Supplement, (viii) the voting
rights, if any, of Capital Securities in addition to those required by law,
including the number of votes per Capital Security and any requirement for the
approval by the holders of Capital Securities as a condition to specified action
or amendments to the Declaration, (ix) the terms and conditions, if any, upon
which Junior Subordinated Debt held by such AmerUs Trust may be distributed to
holders of Capital Securities, and (x) any other relevant rights, preferences,
privileges, limitations or restrictions applicable to Capital Securities
consistent with the Declaration or with applicable law. All Capital Securities
offered hereby will be guaranteed by the Company to the extent set forth below
under "Description of Guarantees." The Guarantee issued for the benefit of the
holders of the Capital Securities, when taken together with the Company's
back-up undertakings, consisting of its obligations under each Declaration
(including the obligation to pay expenses of each AmerUs Trust), the
Subordinated
                                       60
<PAGE>   132
 
Indenture and any applicable supplemental indentures thereto and the Junior
Subordinated Debt issued to any AmerUs Trust will provide in the aggregate a
full and unconditional guarantee by the Company of amounts due on the Capital
Securities issued by each AmerUs Trust. The payment terms of the Capital
Securities will be the same as the Junior Subordinated Debt issued to the
applicable AmerUs Trust by the Company.
 
     Each Declaration will authorize the Administrative Trustees to issue on
behalf of the applicable AmerUs Trust one series of Common Securities having
such terms including distributions, redemption, voting, liquidation rights or
such restrictions as shall be established by the Administrative Trustees in
accordance with such Declaration or as shall otherwise be set forth therein. The
terms of the Common Securities issued by each AmerUs Trust will be substantially
identical to the terms of the Capital Securities issued by such AmerUs Trust,
and the Common Securities will rank pari passu in right of payment, and payments
will be made thereon pro rata, with the Capital Securities except that, if an
event of default under such Declaration has occurred and is continuing, the
rights of the holders of the Common Securities to payment in respect of
distributions and payments upon liquidation, redemption and otherwise will be
subordinated to the rights of the holders of the Capital Securities. The Common
Securities will also carry the right to vote and to appoint, remove or replace
any of the Administrative Trustees of such AmerUs Trust. All of the Common
Securities of each AmerUs Trust will be directly or indirectly owned by the
Company.
 
     The financial statements of any AmerUs Trust that issues Capital Securities
will be reflected in the Company's consolidated financial statements with the
Capital Securities shown as Company-obligated mandatorily-redeemable Capital
Securities of a subsidiary trust under minority interest in consolidated
subsidiaries. In a footnote to the Company's audited financial statements there
will be included statements that the applicable AmerUs Trust is wholly-owned by
the Company and that the sole asset of such AmerUs Trust is the Junior
Subordinated Debt (indicating the principal amount, interest rate and maturity
date thereof).
 
                           DESCRIPTION OF GUARANTEES
 
     Set forth below is a summary of information concerning the Guarantees that
will be executed and delivered by the Company for the benefit of the holders,
from time to time, of Capital Securities. Each Guarantee will be qualified as an
indenture under the Trust Indenture Act. Unless otherwise specified in the
applicable Prospectus Supplement, First Union Bank will act as indenture trustee
for Trust Indenture Act purposes under each Guarantee (the "Guarantee Trustee").
The terms of each Guarantee will be those set forth in such Guarantee and those
made part of such Guarantee by the Trust Indenture Act. The following summary
does not purport to be complete and is subject to and qualified in its entirety
by reference to the provisions of the form of Guarantee, a copy of which has
been filed as an exhibit to the Registration Statement of which this Prospectus
is a part, and the Trust Indenture Act. Each Guarantee will be held by the
Guarantee Trustee for the benefit of the holders of the Capital Securities of
the applicable AmerUs Trust.
 
GENERAL
 
     Unless otherwise specified in the applicable Prospectus Supplement,
pursuant to each Guarantee, the Company will agree, to the extent set forth
therein, to pay in full to the holders of the Capital Securities, the Guarantee
Payments (as defined below) (except to the extent paid by such AmerUs Trust), as
and when due, regardless of any defense, right of set-off or counterclaim which
such AmerUs Trust may have or assert. The following payments or distributions
with respect to the Capital Securities (the "Guarantee Payments"), to the extent
not paid by such AmerUs Trust, will be subject to the Guarantee (without
duplication): (i) any accrued and unpaid distributions that are required to be
paid on such Capital Securities, to the extent such AmerUs Trust shall have
funds available therefor, and (ii) the redemption price, including all accrued
and unpaid distributions to the date of redemption (the "Redemption Price"), to
the extent such AmerUs Trust has funds available therefor, with respect to any
Capital Securities called for redemption by such AmerUs Trust. The Company's
obligation to make a Guarantee Payment may be satisfied by direct payment of the
required amounts by the Company to the holders of Capital Securities or by
causing the applicable AmerUs Trust to pay such amounts to such holders.
 
                                       61
<PAGE>   133
 
     Each Guarantee will not apply to any payment of distributions except to the
extent the applicable AmerUs Trust shall have funds available therefor. If the
Company does not make interest or principal payments on the Junior Subordinated
Debt purchased by such AmerUs Trust, such AmerUs Trust will not pay
distributions on the Capital Securities issued by such AmerUs Trust and will not
have funds available therefor.
 
     The Company has also agreed to guarantee the obligations of each AmerUs
Trust with respect to the Common Securities (the "Common Guarantee") issued by
such AmerUs Trust to the same extent as the Guarantee, except that, if an Event
of Default under the Subordinated Indenture has occurred and is continuing,
holders of Capital Securities under the Guarantee shall have priority over
holders of the Common Securities under the Common Guarantee with respect to
distributions and payments on liquidation, redemption or otherwise.
 
STATUS OF THE GUARANTEES
 
     The Guarantees will constitute an unsecured obligation of the Company and
will rank (i) subordinate and junior in right of payment to the Senior
Indebtedness of the Company, except those liabilities of the Company made pari
passu or subordinate by their terms, (ii) pari passu with the most senior
preferred or preference stock now or hereafter issued by the Company and with
any guarantee now or hereafter entered into by the Company in respect of any
preferred or preference stock of any affiliate of the Company and (iii) senior
to the Common Stock. The terms of the Capital Securities provide that each
holder of Capital Securities by acceptance thereof agrees to the subordination
provisions and other terms of the Guarantee relating thereto.
 
     Each Guarantee will constitute a guarantee of payment and not of collection
(that is, the guaranteed party may institute a legal proceeding directly against
the Company to enforce its rights under such Guarantee without instituting a
legal proceeding against any other person or entity).
 
CERTAIN COVENANTS OF THE COMPANY
 
     Unless otherwise specified in the applicable Prospectus Supplement, in each
Guarantee the Company will covenant that, so long as any Capital Securities
issued by the applicable AmerUs Trust remain outstanding, if there shall have
occurred any event of default under such Guarantee or under the Declaration of
such AmerUs Trust, then (a) the Company will not declare or pay any dividend on,
make any distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock (other than (i)
purchases or acquisitions of capital stock of the Company in connection with the
satisfaction by the Company of its obligations under any employee or agent
benefit plans or the satisfaction by the Company of its obligations pursuant to
any contract or security outstanding on the date of such event requiring the
Company to purchase capital stock of the Company, (ii) as a result of a
reclassification of the Company's capital stock or the exchange or conversion of
one class or series of the Company's capital stock for another class or series
of the Company's capital stock, (iii) the purchase of fractional interests in
shares of the Company's capital stock pursuant to the conversion or exchange
provisions of such capital stock or the security being converted or exchanged,
(iv) dividends or distributions in capital stock of the Company (or rights to
acquire capital stock) or repurchases or redemptions of capital stock solely
from the issuance or exchange of capital stock or (v) redemptions or repurchases
of any rights outstanding under a shareholder rights plan); (b) the Company
shall not make any payment of interest, principal or premium, if any, on or
repay, repurchase or redeem any debt securities issued by the Company which rank
junior to the Junior Subordinated Debt issued to the applicable AmerUs Trust and
(c) the Company shall not make any guarantee payments with respect to the
foregoing (other than pursuant to a Guarantee).
 
MODIFICATION OF THE GUARANTEES; ASSIGNMENT
 
     Except with respect to any changes that do not adversely affect the rights
of holders of Capital Securities (in which case no consent of such holders will
be required), each Guarantee may be amended only with the prior approval of the
holders of not less than a majority in liquidation amount of the outstanding
Capital
 
                                       62
<PAGE>   134
 
Securities of such AmerUs Trust. The manner of obtaining any such approval of
holders of such Capital Securities will be set forth in the accompanying
Prospectus Supplement. All guarantees and agreements contained in a Guarantee
shall bind the successors, assigns, receivers, trustees and representatives of
the Company and shall inure to the benefit of the holders of the Capital
Securities of the applicable AmerUs Trust then outstanding.
 
EVENTS OF DEFAULT
 
     An event of default under a Guarantee will occur upon the failure of the
Company to perform any of its payment or other obligations thereunder. The
holders of a majority in liquidation amount of the Capital Securities to which
such Guarantee relates have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the Guarantee Trustee in
respect of such Guarantee or to direct the exercise of any trust or power
conferred upon the Guarantee Trustee under such Guarantee.
 
     If the Guarantee Trustee fails to enforce such Guarantee, any record holder
of Capital Securities to which such Guarantee relates may institute a legal
proceeding directly against the Company to enforce the Guarantee Trustee's
rights under such Guarantee without first instituting a legal proceeding against
the applicable AmerUs Trust, the Guarantee Trustee or any other person or
entity. Notwithstanding the foregoing, if the Company has failed to make a
Guarantee Payment under a Guarantee, a record holder of Capital Securities to
which such Guarantee relates may directly institute a proceeding against the
Company for enforcement of such Guarantee for such payment to the record holder
of the Capital Securities to which such Guarantee relates of the principal of or
interest on the applicable Junior Subordinated Debt on or after the respective
due dates specified in the Junior Subordinated Debt, and the amount of the
payment will be based on the holder's pro rata share of the amount due and owing
on all of the Capital Securities to which such Guarantee relates. The Company
has waived any right or remedy to require that any action be brought first
against the applicable AmerUs Trust or any other person or entity before
proceeding directly against the Company. The record holder in the case of the
issuance of one or more global Capital Securities certificates will be The
Depository Trust Company acting at the direction of the beneficial owners of the
Capital Securities.
 
     The Company will be required to provide annually to the Guarantee Trustee a
statement as to the performance by the Company of certain of its obligations
under each outstanding Guarantee and as to any default in such performance.
 
INFORMATION CONCERNING THE GUARANTEE TRUSTEE
 
     The Guarantee Trustee, prior to the occurrence of a default to a Guarantee,
undertakes to perform only such duties as are specifically set forth in such
Guarantee and, after default with respect to such Guarantee, shall exercise the
same degree of care as a prudent individual would exercise in the conduct of his
or her own affairs. Subject to such provision, the Guarantee Trustee is under no
obligation to exercise any of the powers vested in it by a Guarantee at the
request of any holder of Capital Securities to which such Guarantee relates
unless it is offered reasonable indemnity against the costs, expenses and
liabilities that might be incurred thereby.
 
TERMINATION
 
     Each Guarantee will terminate as to the Capital Securities issued by the
applicable AmerUs Trust upon full payment of the Redemption Price of all Capital
Securities of such AmerUs Trust, upon distribution of the Junior Subordinated
Debt held by such AmerUs Trust to the holders of all of the Capital Securities
of such AmerUs Trust or upon full payment of the amounts payable in accordance
with the Declaration of such AmerUs Trust upon liquidation of such AmerUs Trust.
Each Guarantee will continue to be effective or will be reinstated, as the case
may be, if at any time any holder of Capital Securities issued by the applicable
AmerUs Trust must restore payment of any sums paid under such Capital Securities
or such Guarantee.
 
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<PAGE>   135
 
GOVERNING LAW
 
     The Guarantees will be governed by and construed in accordance with the law
of the State of New York.
 
              DESCRIPTION OF THE PURCHASE CONTRACTS AND THE UNITS
 
     The Company may issue Purchase Contracts, including contracts obligating
holders to purchase from the Company, and the Company to sell to the holders, a
specified number of shares of Common Stock or Preferred Stock at a future date
or dates. The consideration per share of Common Stock or Preferred Stock may be
fixed at the time the Purchase Contracts are issued or may be determined by
reference to a specific formula set forth in the Purchase Contracts. The
Purchase Contracts may be issued separately or as a part of units ("Units"),
including, but not limited to, adjustable conversion-rate equity security units.
Each Unit consists of a Purchase Contract and Debt Securities, Capital
Securities or debt obligations of third parties, including U.S. Treasury
securities, securing the holders' obligations to purchase the Common Stock or
Preferred Stock under the Purchase Contracts. The Purchase Contracts may require
the Company to make periodic payments to the holders of the Units or vice versa,
and such payments may be unsecured or refunded on some basis. The Purchase
Contracts may require holders to secure their obligations thereunder in a
specified manner.
 
     The applicable Prospectus Supplement will describe the terms of any
Purchase Contracts or Units. The description in the Prospectus Supplement will
not necessarily be complete, and reference will be made to the Purchase
Contracts, and, if applicable, collateral arrangements and depositary
arrangements, relating to such Purchase Contracts or Units.
 
                              PLAN OF DISTRIBUTION
 
     The Company and/or any AmerUs Trust may sell any of the Securities being
offered hereby in any one or more of the following ways from time to time: (i)
through agents; (ii) to or through underwriters; (iii) through dealers; or (iv)
directly to purchasers.
 
     The Prospectus Supplement with respect to the Securities will set forth the
terms of the offering of the Securities, including the name or names of any
underwriters, dealers or agents; the purchase price of the Securities and the
proceeds to the Company and/or an AmerUs Trust from such sale; any underwriting
discounts and commissions or agency fees and other items constituting
underwriters' or agents' compensation; any initial public offering price and any
discounts or concessions allowed or reallowed or paid to dealers and any
securities exchange on which such Securities may be listed. Any initial public
offering price, discounts or concessions allowed or reallowed or paid to dealers
may be changed from time to time.
 
     The distribution of the Securities may be effected from time to time in one
or more transactions at a fixed price or prices, which may be changed, at market
prices prevailing at the time of sale, at prices related to such prevailing
market prices or at negotiated prices.
 
     Offers to purchase Securities may be solicited by agents designated by the
Company from time to time. Any such agent involved in the offer or sale of the
Securities in respect of which this Prospectus is delivered will be named, and
any commissions payable by the Company and/or the applicable AmerUs Trust to
such agent will be set forth, in the applicable Prospectus Supplement. Unless
otherwise indicated in such Prospectus Supplement, any such agent will be acting
on a reasonable best efforts basis for the period of its appointment. Any such
agent may be deemed to be an underwriter, as that term is defined in the
Securities Act, of the Securities so offered and sold.
 
     If Securities are sold by means of an underwritten offering, the Company
and/or the applicable AmerUs Trust will execute an underwriting agreement with
an underwriter or underwriters at the time an agreement for such sale is
reached, and the names of the specific managing underwriter or underwriters, as
well as any other underwriters, and the terms of the transaction, including
commissions, discounts and any other compensation of the underwriters and
dealers, if any, will be set forth in the applicable Prospectus Supplement which
will be used by the underwriters to make resales of the Securities in respect of
which this Prospectus is
                                       64
<PAGE>   136
 
delivered to the public. If underwriters are utilized in the sale of the
Securities in respect of which this Prospectus is delivered, the Securities will
be acquired by the underwriters for their own account and may be resold from
time to time in one or more transactions, including negotiated transactions, at
fixed public offering prices or at varying prices determined by the underwriter
at the time of sale. Securities may be offered to the public either through
underwriting syndicates represented by managing underwriters or directly by the
managing underwriters. If any underwriter or underwriters are utilized in the
sale of the Securities, unless otherwise indicated in the Prospectus Supplement,
the underwriting agreement will provide that the obligations of the underwriters
are subject to certain conditions precedent and that the underwriters with
respect to a sale of Securities will be obligated to purchase all such
Securities of a series if any are purchased.
 
     If a dealer is utilized in the sales of the Securities in respect of which
this Prospectus is delivered, the Company and/or the applicable AmerUs Trust
will sell such Securities to the dealer as principal. The dealer may then resell
such Securities to the public at varying prices to be determined by such dealer
at the time of resale. Any such dealer may be deemed to be an underwriter, as
such term is defined in the Securities Act, of the Securities so offered and
sold. The name of the dealer and the terms of the transaction will be set forth
in the Prospectus Supplement relating thereto.
 
     Offers to purchase Securities may be solicited directly by the Company
and/or the applicable AmerUs Trust and the sale thereof may be made by the
Company and/or the applicable AmerUs Trust directly to institutional investors
or others, who may be deemed to be underwriters within the meaning of the
Securities Act with respect to any resale thereof. The terms of any such sales
will be described in the Prospectus Supplement relating thereto.
 
     Agents, underwriters and dealers may be entitled under relevant agreements
to indemnification or contribution by the Company and/or the applicable AmerUs
Trust against certain liabilities, including liabilities under the Securities
Act.
 
     Agents, underwriters and dealers may be customers of, engage in
transactions with, or perform services for, the Company and its subsidiaries in
the ordinary course of business.
 
     Securities may also be offered and sold, if so indicated in the applicable
Prospectus Supplement, in connection with a remarketing upon their purchase, in
accordance with a redemption or repayment pursuant to their terms, or otherwise,
by one or more firms ("remarketing firms"), acting as principals for their own
accounts or as agents for the Company and/or the applicable AmerUs Trust. Any
remarketing firm will be identified and the terms of its agreement, if any, with
its compensation will be described in the applicable Prospectus Supplement.
Remarketing firms may be deemed to be underwriters, as such term is defined in
the Securities Act, in connection with the Securities remarketed thereby.
Remarketing firms may be entitled under agreements which may be entered into
with the Company and/or the applicable AmerUs Trust to indemnification or
contribution by the Company and/or the applicable AmerUs Trust against certain
civil liabilities, including liabilities under the Securities Act, and may be
customers of, engage in transactions with or perform services for AmerUs and its
subsidiaries in the ordinary course of business.
 
     If so indicated in the applicable Prospectus Supplement, the Company and/or
the applicable AmerUs Trust may authorize agents, underwriters or dealers to
solicit offers by certain types of institutions to purchase Securities from the
Company and/or the applicable AmerUs Trust at the public offering prices set
forth in the applicable Prospectus Supplement pursuant to delayed delivery
contracts ("Contracts") providing for payment and delivery on a specified date
or dates in the future. A commission indicated in the applicable Prospectus
Supplement will be paid to underwriters, dealers and agents soliciting purchases
of Securities pursuant to Contracts accepted by the Company and/or the
applicable AmerUs Trust.
 
     If so indicated in the applicable Prospectus Supplement, in connection with
the offering of Class A Common Stock or any Securities issued by the Company or
any AmerUs Trust, convertible or exchangeable into Class A Common Stock, the
Company's parent and majority shareholder, AmerUs Group, may be offered the
opportunity to purchase such Securities concurrently with a public offering at
the public offering price less any applicable underwriting discounts and
commissions.
 
                                       65
<PAGE>   137
 
                             VALIDITY OF SECURITIES
 
     Unless otherwise indicated in the applicable Prospectus Supplement, the
validity of Securities (other than the Capital Securities) will be passed upon
for the Company by Joseph K. Haggerty, Esq., Senior Vice President and General
Counsel of the Company and Sidley & Austin, Chicago, Illinois. Sidley & Austin
will rely as to matters governed by the laws of the State of Iowa upon the
opinion of Joseph K. Haggerty, Esq.
 
     Certain matters of Delaware law relating to the validity of the Capital
Securities will be passed upon for the AmerUs Trusts by Morris, James, Hitchens
& Williams, special Delaware counsel to the AmerUs Trusts.
 
                                    EXPERTS
 
     The consolidated financial statements of the Company, as of December 31,
1997 and 1996, and for each of the years in the three-year period ended December
31, 1997, have been incorporated by reference herein in reliance upon the
reports of KPMG Peat Marwick LLP, independent accountants, which reports are
also incorporated by reference herein, and upon the authority of said firm as
experts in accounting and auditing.
 
     The consolidated financial statements and schedules of Delta as of December
31, 1996 and 1995, and for each of the years in the three-year period ended
December 31, 1996, have been incorporated by reference herein in reliance upon
the reports of Coopers & Lybrand L.L.P., independent accountants, which reports
are also incorporated by reference herein, and upon the authority of said firm
as experts in accounting and auditing.
 
     The consolidated financial statements and schedules of AmVestors as of
December 31, 1996 and 1995, and for each of the years in the three-year period
ended December 31, 1996, have been incorporated by reference herein in reliance
upon the reports of Deloitte & Touche LLP, independent accountants, which
reports are also incorporated by reference herein, and upon the authority of
said firm as experts in accounting and auditing.
 
                                       66
<PAGE>   138
 
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     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED OR INCORPORATED BY REFERENCE IN THIS
PROSPECTUS SUPPLEMENT OR THE PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION
OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED. THIS
PROSPECTUS SUPPLEMENT AND THE PROSPECTUS DO NOT CONSTITUTE AN OFFER TO SELL OR
THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES
DESCRIBED IN THIS PROSPECTUS SUPPLEMENT OR AN OFFER TO SELL OR THE SOLICITATION
OF AN OFFER TO BUY SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR
SOLICITATION IS UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS SUPPLEMENT OR
THE PROSPECTUS NOR ANY SALE MADE HEREUNDER OR THEREUNDER SHALL, UNDER ANY
CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THE INFORMATION CONTAINED HEREIN OR
THEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE OF SUCH INFORMATION.
 
                             ---------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                          PAGE
                                          ----
<S>                                       <C>
PROSPECTUS SUPPLEMENT
Prospectus Summary......................   S-3
Selected Consolidated Financial and
  Operating Data........................  S-13
Risk Factors............................  S-15
The Trust...............................  S-20
Use of Proceeds.........................  S-21
Price Range of Common Stock and Dividend
  Policy................................  S-21
Capitalization..........................  S-23
Management's Discussion and Analysis of
  Results of Operations and Financial
  Condition.............................  S-24
Accounting Treatment....................  S-27
Description of the Units................  S-28
Certain Federal Income Tax
  Consequences..........................  S-61
Underwriting............................  S-67
Validity of the Securities..............  S-68
Index of Defined Terms..................  S-69
PROSPECTUS
Available Information...................     4
Incorporation of Certain Documents by
  Reference.............................     4
The Company.............................     6
The AmerUs Trusts.......................     8
Organizational Structure................    10
Selected Consolidated Financial and
  Operating Data........................    11
Risk Factors............................    13
Use of Proceeds.........................    18
Reorganization and Recent
  Acquisitions..........................    19
Management's Discussion and Analysis of
  Results of Operations and Financial
  Condition.............................    22
Business................................    34
Description of Debt Securities..........    43
Description of Capital Stock............    53
Description of Warrants.................    59
Description of Capital Securities of the
AmerUs Trusts...........................    60
Description of Guarantees...............    61
Description of the Purchase Contracts
  and the Units.........................    64
Plan of Distribution....................    64
Validity of Securities..................    65
Experts.................................    66
</TABLE>
 
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                                    UNITS
                                      
                          AMERUS LIFE HOLDINGS, INC.
                                      
                           AMERUS CAPITAL TRUST II
                                      
                                 % ADJUSTABLE
                               CONVERSION-RATE
                            EQUITY SECURITY UNITS
                         ---------------------------
                                      
                      [AMERUS LIFE HOLDINGS, INC. LOGO]
                         ---------------------------
                                      
                             GOLDMAN, SACHS & CO.
                                      
                             SALOMON SMITH BARNEY
 
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