SUPERIOR NATIONAL INSURANCE GROUP INC
S-1, 1998-07-07
INSURANCE AGENTS, BROKERS & SERVICE
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<PAGE>   1
 
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON
                                           , 1998
 
                                            REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                              <C>                              <C>
            DELAWARE                           6331                          95-4610936
(STATE OR OTHER JURISDICTION OF    (PRIMARY STANDARD INDUSTRIAL           (I.R.S. EMPLOYER
 INCORPORATION OR ORGANIZATION)    CLASSIFICATION CODE NUMBER)          IDENTIFICATION NO.)
</TABLE>
 
                               26601 AGOURA ROAD
                          CALABASAS, CALIFORNIA 91302
                                 (818) 880-1600
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                            ------------------------
 
                             ROBERT E. NAGLE, ESQ.
              SENIOR VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY
                               26601 AGOURA ROAD
                          CALABASAS, CALIFORNIA 91302
                                 (818) 880-1600
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                            ------------------------
 
                                   COPIES TO:
 
<TABLE>
<S>                                              <C>
              DANA M. WARREN, ESQ.                            GARY I. HOROWITZ, ESQ.
               RIORDAN & MCKINZIE                             JOHN R. LOBRANO, ESQ.
       300 SOUTH GRAND AVENUE, SUITE 2900                   SIMPSON THACHER & BARTLETT
         LOS ANGELES, CALIFORNIA 90071                         425 LEXINGTON AVENUE
                 (213) 629-4824                              NEW YORK, NEW YORK 10017
                                                                  (212) 455-2000
</TABLE>
 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
  As soon as practicable after this Registration Statement becomes effective.
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [ ]
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]
                            ------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<S>                             <C>                   <C>                   <C>                   <C>
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
                                                        PROPOSED MAXIMUM      PROPOSED MAXIMUM
TITLE OF EACH CLASS OF              AMOUNT TO BE         OFFERING PRICE      AGGREGATE OFFERING        AMOUNT OF
SECURITIES TO BE REGISTERED          REGISTERED           PER UNIT(1)             PRICE(1)          REGISTRATION FEE
- ----------------------------------------------------------------------------------------------------------------------
Rights........................          (2)                   None                  None                  None
Common Stock, $.01 par value
  per share...................    6,548,664 Shares           $16.75             $109,690,122            $32,359
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Estimated solely for the purpose of calculating the registration fee.
 
(2) Rights to subscribe for shares of Common Stock evidenced by subscription
    certificates. No separate consideration will be received for the Rights and
    pursuant to Rule 457, no registration fee is payable with respect to the
    Rights.
                            ------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
    The Stock Offering contemplated by this Registration Statement is subject to
the prior approval of the holders of the Registrant's Common Stock. A proxy
statement will be prepared and filed with the Commission to solicit proxies from
the holders of the Registrant's Common Stock for use at an annual meeting of
stockholders of the Registrant to consider and vote upon the Stock Offering and
the other matters described therein.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT
BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
         SUBJECT TO COMPLETION, DATED                            , 1998
 
PROSPECTUS
          , 1998
 
[LOGO]
                                6,548,664 SHARES
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                  COMMON STOCK
 
    Superior National Insurance Group, Inc., a Delaware corporation ("Superior
National" or the "Company"), is distributing (i) to holders of record as of the
close of business on            , 1998 (the "Record Date") of shares of its
common stock, par value $.01 per share (the "Common Stock") (excluding IP
Delaware and IP Bermuda (as defined below)) and outstanding warrants to purchase
Common Stock, excluding certain warrant holders as described herein, one
transferable subscription right ("a Right") to subscribe for and purchase a
share of Common Stock for a price of $16.75 (the "Subscription Price") for each
share of Common Stock or warrant held (the "Rights Offering") and (ii) to each
employee and consultant of the Company holding vested and unvested stock
options, or granted shares of restricted Common Stock, the same form of Right
issued in the Rights Offering, excepting contractual restrictions on
transferability (the "Employee Participation," and, together with the Rights
Offering, the "Stock Offering"). The Stock Offering is part of a plan to finance
the Company's acquisition of Business Insurance Group, Inc. (the "Acquisition").
The closing of the Stock Offering is conditioned upon completion of the
Acquisition.
 
    The Company also has entered into a stock purchase agreement (the "Stock
Purchase Agreement") with Insurance Partners, L.P. ("IP Delaware"), Insurance
Partners Offshore (Bermuda), L.P. ("IP Bermuda"), and Insurance Partners II,
L.P. and/or Insurance Partners II Private Fund, L.P. (collectively, "IP II,"
and, together with IP Delaware and IP Bermuda, "IP") pursuant to which, subject
to certain conditions, IP has provided a standby commitment (the "Standby
Commitment") to purchase at the Subscription Price shares of Common Stock that
are not subscribed for in connection with the Stock Offering, not to exceed
$106.0 million. The Company will pay a fee consisting of warrants exercisable to
purchase 734,000 shares of Common Stock at a purchase price of $16.75 (the
"Commitment Fee Warrants") in consideration for the Standby Commitment. No
Rights will be issued to the recipients of the Commitment Fee Warrants.
 
    The Stock Offering and the Rights will expire at 5:00 p.m., New York City
time, on            , 1998 unless extended by the Company from time to time
(such date, as it may be extended, is referred to herein as the "Expiration
Date"). HOLDERS SHOULD NOTE THAT IMMEDIATELY AVAILABLE FUNDS ARE REQUIRED BY THE
EXPIRATION DATE FOR A SUBSCRIPTION TO BE VALID. Although personal checks will be
accepted, if they have not cleared by the Expiration Date the subscription will
not be valid. See "The Stock Offering -- Exercise of Rights." Holders who
exercise their Rights will not be entitled to revoke their subscriptions.
Holders who do not exercise or sell their Rights will relinquish any value
inherent in the Rights. Accordingly, holders are strongly urged to exercise or
sell their Rights. See "Risk Factors -- Dilution."
 
    CURRENT STOCKHOLDERS AND WARRANT HOLDERS OF THE COMPANY WHO DO NOT
PARTICIPATE IN THE STOCK OFFERING WILL SUFFER A SUBSTANTIAL DILUTION IN THEIR
RELATIVE PERCENTAGE OWNERSHIP IN THE COMPANY UPON ISSUANCE OF COMMON STOCK TO
HOLDERS EXERCISING RIGHTS AND, TO THE EXTENT A SUFFICIENT NUMBER OF SUCH RIGHTS
ARE NOT EXERCISED, TO IP PURSUANT TO THE STANDBY COMMITMENT.
                             (cover page continues)
 
      SEE "RISK FACTORS," BEGINNING ON PAGE 18, FOR INFORMATION THAT SHOULD BE
CONSIDERED BY PROSPECTIVE INVESTORS.
 
  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.
 
<TABLE>
<S>                                                       <C>                       <C>
- ------------------------------------------------------------------------------------------------------------
                                                                                          PROCEEDS TO
                                                             SUBSCRIPTION PRICE          COMPANY(1)(2)
- ------------------------------------------------------------------------------------------------------------
Per Share...............................................           $16.75                    $16.75
Total...................................................        $109,690,122              $109,690,122
- ------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Assumes the purchase of all shares of Common Stock offered hereby. Before
    deducting expenses payable by the Company estimated to be $600,000.
 
(2) The Company has agreed to indemnify the Dealer Manager against certain
    liabilities, including liabilities under the Securities Act of 1933, as
    amended.
 
                 The Dealer Manager for the Rights Offering is:
                          DONALDSON, LUFKIN & JENRETTE
                              SECURITIES CORPORATION
<PAGE>   3
 
                             (cover page continues)
 
     The Common Stock is traded on The Nasdaq National Market ("Nasdaq") under
the symbol "SNTL." On May 4, 1998 (the last day on which trading prices were
reported prior to the public announcement of the Stock Offering) and on
               , 1998, the last reported per share sales price of the Common
Stock was $20.50 and $          , respectively. It is anticipated that the
Rights will trade on Nasdaq under the symbol "     ." Certain registered
broker-dealers have indicated to the Company that they intend to make a market
in the Rights. There can be no assurance, however, that a market for the Rights
will develop. Orders to sell Rights must be received by the Subscription Agent
(as defined herein) not later than 11:00 a.m., New York City time, on the third
Nasdaq trading day prior to the Expiration Date if a holder wishes to sell
Rights through the Subscription Agent.
 
     Under resolutions adopted by the Board of Directors of the Company (the
"Board of Directors" or "Board"), Rights will be issued under the Employee
Participation only upon delivery of a participation agreement restricting
transfer of the Right, and "stop transfer" instructions will be issued to the
Subscription Agent. Each Right issued under the Employee Participation may be
exercised to purchase one share of Common Stock, at a subscription price of
$16.75 per share. Employees and consultants of the Company intending to exercise
their Rights must deliver an executed stock purchase agreement and payment of
the subscription price no later than 5:00 p.m., New York City time, on the
Expiration Date. Such payment may be delivered in the form of a secured
promissory note so long as securities pledged as collateral have sufficient
value, with value determined as stated herein. See "The Stock Offering --
Employee Participation." The stock subscription agreement will contain
restrictions on the transferability of the shares acquired and rights of
repurchase in favor of the Company.
<PAGE>   4
 
                             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
Securities and Exchange Commission (the "SEC" or the "Commission"). Such
reports, proxy statements, and other information may be inspected and copied at
the public reference facilities maintained by the Commission at Room 1024, 450
Fifth Street, N.W., Washington, D.C. 20549, and at the Regional Offices of the
Commission located at Suite 1400, Citicorp Center, 500 West Madison Street,
Chicago, Illinois 60661 and Room 1300, 7 World Trade Center, New York, New York
10048. Copies of such material may also be obtained by mail from the Public
Reference Branch of the Commission at 450 Fifth Street, N.W., Washington, D.C.
20549 at prescribed rates. Such information may also be accessed electronically
by means of the Commission's home page on the Internet (http://www.sec.gov).
Additionally, the Common Stock is traded on Nasdaq. Accordingly, such reports,
proxy statements, and other information are also available for inspection at the
library of Nasdaq at 1735 K Street, N.W., Washington, D.C. 20006.
 
     Business Insurance Group, Inc. is not subject to the informational
requirements of the Exchange Act; however, it is an indirect subsidiary of
Foundation Health Systems, Inc., which does file such reports, proxy statements,
and other information with the Commission.
 
     The Company has filed with the Commission a Registration Statement on Form
S-1 (together with all amendments and exhibits thereto, referred to as the
"Registration Statement") under the Securities Act of 1933, as amended (the
"Securities Act") with respect to the securities offered by this Prospectus.
This Prospectus does not contain all of the information set forth in the
Registration Statement and the exhibits and schedules relating thereto, certain
portions of which have been omitted as permitted by the rules and regulations of
the Commission. For further information with respect to the Company and the
securities offered by this Prospectus, reference is made to the Registration
Statement and the exhibits filed or incorporated as a part thereof, which are on
file at the offices of the Commission. Statements contained in this Prospectus
as to the contents of any documents referred to are not necessarily complete,
and, in each such instance, are qualified in all respects by reference to the
applicable documents filed with the Commission.
 
                                        2
<PAGE>   5
 
                               PROSPECTUS SUMMARY
 
     See "Glossary of Terms" ("Glossary") for the definitions of certain of the
capitalized and defined terms used herein.
 
     The following is a brief summary of certain information contained elsewhere
in this Prospectus and is qualified in its entirety by the more detailed
information, including "Risk Factors" and the consolidated financial statements
and notes thereto, appearing elsewhere in this Prospectus. Unless the context
indicates otherwise, (i) the "Company" or "Superior National" refers to Superior
National Insurance Group, Inc., a Delaware corporation, and its Subsidiaries,
(ii) the "Subsidiaries" refer to the direct and indirect subsidiaries of the
Company, including, after the Acquisition, BIG (each as defined below), and
(iii) "Superior Pacific" refers to Superior National Insurance Company ("SNIC")
and Superior Pacific Casualty Company ("SPCC"), the principal operating
subsidiaries of the Company. "BIG" refers to the insurance business of Business
Insurance Group, Inc., a Delaware corporation, and, where the context indicates,
BIG and its wholly owned insurance subsidiaries, Business Insurance Company
("BICO"), California Compensation Insurance Company ("CalComp"), Combined
Benefits Insurance Company ("CBIC"), and Commercial Compensation Insurance
Company ("CCIC," and, together with BICO, CalComp, and CBIC, the "BIG Insurance
Subsidiaries"). "FHS" refers to Foundation Health Systems, Inc., the holding
company that is the ultimate parent of BIG, and "FHC" refers to Foundation
Health Corporation, a subsidiary of FHS and the immediate parent of BIG.
 
     Unless otherwise indicated, all financial information and operating
statistics applicable to the Company and BIG set forth in this Prospectus are
based on generally accepted accounting principles ("GAAP") and not statutory
accounting practices ("SAP"). In conformity with industry practice, data derived
from A.M. Best Company, Inc. ("A.M. Best") and the National Association of
Insurance Commissioners ("NAIC"), generally used herein for industry
comparisons, are based on SAP.
 
                                  THE COMPANY
 
     Superior National is a holding company that, through its wholly owned
subsidiaries, SNIC and SPCC, underwrites and markets workers' compensation
insurance principally in the State of California and, until September 30, 1993,
was engaged in the underwriting and marketing of commercial property and
casualty ("P&C") insurance. On May 5, 1998, Superior National agreed to acquire
BIG for approximately $285.0 million in cash (the "Acquisition"). Pro forma for
the Acquisition of BIG, the Company would have had direct written premium of
$823.3 million and $846.6 million for the years ended December 31, 1996 and
1997, respectively, and $195.0 million in direct written premium in the first
quarter of 1998. Based on available data for 1997 on direct written premium, on
a pro forma basis, the Company and BIG would be the largest private sector
workers' compensation insurer in California.
 
     In April 1997, Superior National acquired Pac Rim Holding Corporation ("Pac
Rim"), the parent company of The Pacific Rim Assurance Company (subsequently
renamed SPCC). SPCC's Southern California operations complement SNIC's
historical focus on Central and Northern California. As a result of the
acquisition of SPCC (the "Pac Rim Transaction"), the Company believes that,
excluding the California State Compensation Insurance Fund (the "State Fund"),
it is the eighth largest California workers' compensation insurer overall, based
upon 1996 direct written premium. Pro forma for the Pac Rim Transaction, the
Company would have had direct written premium of $182.2 million and $179.7
million for the years ended December 31, 1996 and 1997, respectively, and had
$41.1 million in direct written premium in the first quarter of 1998. The Pac
Rim Transaction has enabled the Company to increase its book of California
workers' compensation business and generate significant expense savings through
the consolidation of the back office operations of the two companies. The
Company is continuing its acquisition strategy through its anticipated
combination with BIG and the related financing transactions, which it believes
will generate significant benefits:
 
     - The Company will be the largest private sector workers' compensation
       carrier in California, based on available data on 1997 direct written
       premium.
 
                                        3
<PAGE>   6
 
     - While increasing its presence in California, the Company will also
       diversify geographically by acquiring BIG's non-California book of
       business, thereby lessening its dependence on the California market for
       workers' compensation insurance.
 
     - The Company will have the opportunity to improve BIG's financial
       performance by implementing the Company's underwriting policies, applying
       its expertise in information systems, and using reinsurance to mitigate
       financial and integration risk during the transition period.
 
     - The Company will benefit from economies of scale over a period of years,
       potentially realizing cost savings as a result.
 
     - The Company will reduce its financial leverage due to the additional
       equity provided by the Equity Financings (defined below).
 
     - The Company will strengthen its relationship with IP (defined below),
       providing opportunities for additional acquisitions and continued growth.
 
STRUCTURE OF THE ACQUISITION AND RELATED FINANCING TRANSACTIONS
 
     The Company has entered into a definitive agreement (the "Acquisition
Agreement") to acquire BIG from FHC, for aggregate consideration of
approximately $285.0 million in cash. BIG is a holding company that, through its
subsidiaries, writes workers' compensation and group health insurance,
principally in California, with branch operations throughout the continental
United States. Under the Acquisition Agreement, upon consummation of the
Acquisition (the "Closing"), BIG will become a wholly owned subsidiary of the
Company. As a result, CalComp, CCIC, and CBIC, which are currently wholly owned
subsidiaries of BIG, will become indirect operating subsidiaries of the Company.
BICO will be sold to Zurich Centre Group LLC, an affiliate of Zurich Centre
Group Holdings, Limited ("Zurich"), immediately after the Closing. Prior to the
sale of BICO, the Company will transfer the operating assets, liabilities, and
infrastructure of BICO into Superior Pacific. The Company will thereafter
continue to do business outside of California through CCIC and BICO, utilizing
an underwriting arrangement with an affiliate of Zurich. In connection with the
Acquisition, FHC is obligated prior to Closing to cause all of BIG's
intercompany balances and real estate holdings related to FHC and its parent,
FHS, and their affiliates, to be settled in cash.
 
     The Acquisition of BIG will be financed by the Company with a combination
of equity and debt. The debt portion of the financing will be provided by the
proceeds from the issuance and sale in a public offering of approximately $110.0
million in aggregate principal amount of the Company's senior notes (the "Senior
Notes Offering"). The equity portion consists of the issuance and sale of
approximately $109.7 million of Common Stock (the "Stock Offering"), which
consists of the offering of rights to purchase Common Stock (the "Rights") to
existing stockholders (other than IP Delaware and IP Bermuda) and warrant
holders (excluding certain warrant holders exercising preemptive rights) (the
"Rights Offering"), and the offering of Rights to holders of options and grants
of restricted stock (the "Employee Participation"). Additionally, Insurance
Partners, L.P. ("IP Delaware"), Insurance Partners Offshore (Bermuda), L.P. ("IP
Bermuda"), and Insurance Partners II, L.P. and/or Insurance Partners II Private
Fund, L.P. (collectively, "IP II," and, together with IP Delaware and IP
Bermuda, "IP") will purchase $94.0 million in Common Stock in a private
transaction (the "IP Stock Issuance"). IP has also agreed to provide a standby
commitment of up to $106.0 million to purchase an amount of shares of Common
Stock not subscribed for in the Stock Offering (the "Standby Commitment")
sufficient to assure the Company of $200.0 million in total equity financing.
The Stock Offering, the Standby Commitment, and the IP Stock Issuance and
preemptive rights exercised in connection therewith, together, are referred to
as the "Equity Financings." The amounts obtained from the Senior Notes Offering
and the Equity Financings in excess of $285.0 million will be used for
transaction costs in connection with the Acquisition, the Senior Notes Offering,
and the Equity Financings; for capital for the Company's insurance subsidiaries;
and for general corporate purposes. The Stock Offering, the Standby Commitment,
the IP Stock Issuance, and the Senior Notes Offering are each conditioned on the
completion of the other and the completion of the Acquisition.
 
                                        4
<PAGE>   7
 
STRATEGY
 
  Integration Strategy
 
     The Company acquired SPCC in April 1997 and has rapidly integrated SPCC's
operations into Superior Pacific. The Company believes it has achieved
significant expense savings through that integration. Although the Company does
not expect any material cost savings to arise in the short term out of the
Acquisition of BIG, the benefits of economies of scale could be realized over a
period of years. The Company's strategy for improving the overall financial
performance of both Superior Pacific and BIG includes:
 
     - Leadership in California Market. As the largest private sector workers'
       compensation insurer in California, the Company will be positioned to
       offer insureds and producers outstanding service, innovative loss control
       programs, and competitive pricing.
 
     - Nationwide Presence; Opportunities for Growth. The Company intends to
       maintain a nationwide presence and seek additional opportunities for
       growth outside of California, using an underwriting arrangement to be
       provided by an affiliate of Zurich (after its purchase of BICO), and the
       regional and branch network established by BIG.
 
     - Underwriting. The Company believes it can accomplish a gradual
       re-underwriting of BIG's book of business to enhance its profitability.
       The pricing and persistency risk associated with larger accounts will be
       mitigated by ceding accounts with estimated annual premium of $25,000 or
       more at inception to a reinsurer.
 
     - Information Systems. The Company believes that its data processing
       systems will give Superior Pacific and BIG a significant competitive
       advantage by (i) enhancing the effectiveness of their employees'
       underwriting, policy administration, and claims activities, (ii)
       providing detailed, real-time, and near real-time information to
       management for control and administration purposes, and (iii) providing
       marketing benefits through improved customer service.
 
     - Loss Control and Claim Management. The Company believes BIG is a leader
       in loss control for workers' compensation insurance, and expects to
       introduce innovative concepts developed by BIG, such as employer safety
       management schools, to Superior Pacific's business. Additionally, once a
       claim is made the Company expects to benefit from service arrangements
       with FHS and the claim severity management services Superior Pacific is
       obtaining from Risk Enterprise Management Limited ("REM") (a Zurich
       affiliate) as part of its Claim Severity Management Program (as described
       herein). These claim practices will continue to emphasize rapid medical
       intervention to mitigate the severity of injuries.
 
     - Producer Relationships. The Company intends to strengthen relationships
       with its producers, including nationally recognized insurance brokers who
       have longstanding relationships with BIG, to reach potential customers
       with nationwide operations. The Company endeavors to be the primary
       supplier of workers' compensation insurance for many of its producers.
       The Company will continue to emphasize its relationships with small- and
       medium-sized producers who often use the Company as a primary underwriter
       of workers' compensation insurance.
 
  Operating Strategy
 
     Superior National intends to continue to focus on the bottom line while
completing the integration of Superior Pacific and BIG. The key elements of its
strategy to maintain operating margins in its business are:
 
     - Focus on Specialized Market Segments. The Company's experienced
       management team utilizes a sophisticated information system to focus the
       Company's business on selected policy sizes and employment
       classifications that management believes provide the greatest opportunity
       for profitability.
 
     - Underwriting Discipline. Following the advent of open rating in
       California in 1995, some California workers' compensation insurers have
       reduced premium rates substantially to increase or maintain market share.
       The Company has not followed this practice and has maintained
       consistently stringent
 
                                        5
<PAGE>   8
 
       underwriting policies to maintain gross profit margins. As a result,
       although the Company experienced declines in premium until acquiring
       SPCC, from 1993 to 1997 the Company's combined ratio from continuing
       operations improved from 100.2% to 90.9%.
 
EXPERIENCED MANAGEMENT; BUSINESS RELATIONSHIPS WITH ZURICH AFFILIATES
 
     The Company is led by an experienced management team, with the Chief
Executive Officer and the Chief Operating Officer having a combined 59 years of
workers' compensation insurance business experience, both in and outside of
California. The experience of management and the Company's sophisticated data
processing systems allow the Company to react quickly to positive and negative
developments in its markets.
 
     In addition, the Company benefits from business relationships with
affiliates of Zurich, which have provided financing and access to their
expertise and products, including claim management services and reinsurance. The
Company currently maintains a facility that allows it to offer certain
policyholders insurance policies written by Zurich Centre Insurance Company, a
Zurich affiliate having an A.M. Best "A" rating. Affiliates of Zurich are
providing services that the Company has integrated into its Claim Severity
Management Program. Furthermore, in December 1997, Centre Reinsurance (Bermuda)
Ltd., an affiliate of Zurich, purchased $10.0 million of the 10 3/4% Trust
Preferred Securities (the "Trust Preferred Securities") issued by the Company's
subsidiary, Superior National Capital Trust I (the "Trust"). In addition, in
connection with the Acquisition, Zurich Centre Group LLC will purchase BICO from
the Company and establish an underwriting arrangement with the Company for a fee
equal to 2.5% of direct written premium plus a pass through of all related
expenses.
 
CALIFORNIA WORKERS' COMPENSATION INSURANCE MARKET
 
     California is the country's largest workers' compensation insurance market.
It is composed of (i) the State Fund, (ii) companies, including BIG, that write
workers' compensation insurance in California but have significant business
writings in other lines of business and/or in other states, and (iii) Superior
National, which, prior to the Acquisition, is the one private sector company
that writes exclusively workers' compensation insurance specifically focusing on
California.
 
     The State Fund, which is obligated to write workers' compensation insurance
for any applicant, including those turned down by the private sector carriers,
is the largest underwriter of workers' compensation insurance in California,
accounting for approximately 19% of the direct written premium in California in
1996. Because the State Fund must accept all risks, its combined ratios have
historically been much higher than those of the private carriers. Despite these
results, the State Fund has consistently achieved profitability through the
investment income earned on its large invested asset base. As of December 31,
1997, the State Fund had invested assets of approximately $7.1 billion and
statutory capital and surplus of approximately $1.6 billion. The State Fund
currently maintains an "A" claims paying ability rating from Standard & Poor's
Corporation ("S&P") and an "A-" rating from A.M. Best. Notwithstanding its
profitability, the State Fund's relatively poor underwriting results, together
with its large size, have created a skewed perception of the underwriting
profitability of companies operating in the California workers' compensation
insurance marketplace. Although the State Fund regularly competes with the
Company for profitable underwriting business, the Company views the State Fund's
role as the insurer of last resort to be a significant benefit because it
eliminates the need to create an assigned risk plan in which the Company and
other insurers conducting business in California would be required to
participate.
 
     While competitive pressures in the California workers' compensation
insurance market increased with the implementation of open rating in January
1995, certain fundamentals of the workers' compensation insurance market in
California recently have improved. For 1996, the latest year for which
information is available, total direct workers' compensation written premium in
California leveled out at approximately $5.0 billion as compared to
approximately $9.0 billion in 1993, as the market began to experience rate
stabilization. Based on the Company's analysis of data obtained from the
California Workers' Compensation Insurance Rating Bureau ("WCIRB") and other
sources, this trend continued in 1997, as demonstrated by a slight improvement
in premium pricing of approximately 0.5% for the year ended December 31, 1997 as
compared
 
                                        6
<PAGE>   9
 
to 1996. Additionally, anti-fraud legislation enacted in 1993 continues to have
a positive effect on underwriting results by addressing fraudulent claims and
medical and legal expenses. These improvements have resulted in a reduction in
the frequency of claims in the California workers' compensation market. However,
beginning in 1997, the Company has recognized an increase in claim severity for
injuries sustained in 1995 and thereafter. Management has taken steps to address
this issue by undertaking a Claim Severity Management Program. BIG also
experienced increased claim severity in 1997 and in early 1998.
 
EFFECT OF THE ACQUISITION
 
     After giving effect to the Acquisition, the Company believes it will be
better positioned than its competitors to compete successfully in the post-open
rating California workers' compensation insurance market, while also reducing
somewhat its dependence on the California market for growth and profitability.
The Company believes it will benefit from its focus on workers' compensation
insurance, and that its leadership position in the California market will allow
it to offer insureds and producers outstanding service, innovative loss control
programs, and competitive pricing. The national presence provided by the
Acquisition will give the Company some diversification from the California
market, offering what the Company believes are attractive growth opportunities
in a number of markets. The Company continues to believe that pricing and
underwriting policies specifically for workers' compensation insurance means
that segment of its business should perform better financially than the workers'
compensation insurance business of insurers who offer workers' compensation
policies to insureds as part of a package of insurance.
 
                                        7
<PAGE>   10
 
                               THE STOCK OFFERING
 
The Stock Offering............   The Stock Offering consists of the Rights
                                 Offering and the Employee Participation, each
                                 as described herein, and involves a total of up
                                 to 6,548,664 shares of Common Stock at a
                                 purchase price of $16.75 per share.
 
Need for Immediately Available
Funds.........................   In order to enable the Company to complete the
                                 Acquisition as soon as possible after the
                                 Expiration Date, all Subscription Price (as
                                 defined) payments must be in immediately
                                 available funds or must clear on or prior to
                                 the Expiration Date. HOLDERS EXERCISING RIGHTS
                                 IN THE WEEK PRIOR TO THE EXPIRATION DATE ARE
                                 URGED TO DELIVER IMMEDIATELY AVAILABLE FUNDS TO
                                 THE SUBSCRIPTION AGENT, BY WIRE TRANSFER IF
                                 POSSIBLE. Although personal checks will be
                                 accepted, if they have not cleared by the
                                 Expiration Date the subscription will not be
                                 valid. SEE "THE STOCK OFFERING -- EXERCISE OF
                                 RIGHTS."
 
Use of Proceeds...............   Because it is likely a number of Rights will
                                 not be exercised, the Company expects the gross
                                 proceeds from the Stock Offering (and, if
                                 necessary, the Standby Commitment) will be
                                 approximately $106.0 million. The proceeds,
                                 together with the proceeds from the Senior
                                 Notes Offering and the IP Stock Issuance, will
                                 be used to fund the $285.0 million purchase
                                 price for BIG. The amounts obtained in excess
                                 of $285.0 million will be used for transaction
                                 costs in connection with the Acquisition and
                                 related financing transactions, for capital for
                                 the Company's insurance subsidiaries, and for
                                 general corporate purposes. See "Use of
                                 Proceeds" and "Acquisition of Business
                                 Insurance Group, Inc."
 
Shares of Common Stock
Outstanding after Stock
  Offering....................   Based on the number of shares outstanding on
                                 the date of this Prospectus and assuming that
                                 no outstanding options or warrants are
                                 exercised, and that all Rights are exercised, a
                                 maximum of 18,036,972 shares of Common Stock
                                 will be outstanding following the Stock
                                 Offering and the IP Stock Issuance.
 
Return of Funds Without
Interest if
  the Acquisition Fails to
  Close.......................   The proceeds of the Stock Offering, together
                                 with the proceeds of the Standby Commitment, if
                                 necessary, the IP Stock Issuance, and the
                                 Senior Notes Offering, will be used to
                                 consummate the Acquisition. The closing of the
                                 Stock Offering is conditioned upon the
                                 simultaneous closing of the Acquisition and the
                                 other related financing transactions. If the
                                 Acquisition does not close (including due to
                                 the failure of the Company to consummate the
                                 other financing transactions), the Subscription
                                 Agent will return subscription funds received
                                 for exercise of the Rights without interest.
 
Issuance of Common Stock......   Certificates representing shares of Common
                                 Stock purchased in the Stock Offering will be
                                 delivered as soon as practicable after the
                                 Closing (expected to be two to three weeks
                                 after the Expiration Date). See "The Stock
                                 Offering -- The Rights."
 
                                        8
<PAGE>   11
 
Subscription Agent............                  has been retained by the Company
                                 as its Subscription Agent. See "The Stock
                                 Offering -- Subscription Agent."
 
Information Agent.............                  has been retained by the Company
                                 as its Information Agent. See "The Stock
                                 Offering -- Information Agent."
 
THE RIGHTS OFFERING
 
The Rights....................   Pursuant to the Rights Offering, the Company
                                 will distribute to each holder of Common Stock
                                 (excluding IP Delaware and IP Bermuda), and to
                                 each of the warrant holders (excluding warrant
                                 holders exercising preemptive rights with
                                 respect to the IP Stock Issuance) as of the
                                 Record Date, one transferable Right for each
                                 share of Common Stock or, in the case of
                                 warrant holders, Common Stock equivalent, held,
                                 and each Right will entitle the holder thereof
                                 to receive, upon payment of the $16.75 per
                                 share subscription price (the "Subscription
                                 Price"), one share of Common Stock. An
                                 aggregate of 6,548,664 Rights (including Rights
                                 issued under the Employee Participation) will
                                 be distributed. Once a holder has exercised a
                                 Right, that exercise may not be revoked. The
                                 Rights issued in the Rights Offering, once
                                 distributed and until the Expiration Date, are
                                 intended to be freely transferable.
 
Subscription Price............   $16.75 in cash per share of Common Stock.
 
Record Date...................               , 1998.
 
Expiration Date...............               , 1998, at 5:00 p.m., New York City
                                 time, unless extended. The Company may extend
                                 the Expiration Date, in its sole discretion,
                                 and will announce any extension by not later
                                 than 9:00 a.m., New York City time, on the
                                 business day following the previously scheduled
                                 Expiration Date. Any extension of the
                                 Expiration Date will be for at least three
                                 Nasdaq trading days. See "The Stock
                                 Offering -- Expiration Date."
 
Transferability of Rights.....   The Rights distributed in the Rights Offering
                                 will be transferable and will be evidenced by
                                 transferable subscription certificates
                                 ("Subscription Certificates"). It is expected
                                 that the Rights will trade on Nasdaq under the
                                 symbol "               " until the close of
                                 business on the last Nasdaq trading day prior
                                 to the Expiration Date. Certain registered
                                 broker-dealers have indicated that they intend
                                 to make a market in the Rights during the
                                 period the Rights are outstanding. No assurance
                                 can be given, however, that a market for the
                                 Rights will develop or, if such a market
                                 develops, how long it will continue, nor can
                                 any assurance be given as to a price sellers of
                                 Rights may receive. For holders not able to
                                 sell Rights in this fashion, the Subscription
                                 Agent will attempt to execute a sale of Rights
                                 upon delivery of a Subscription Certificate,
                                 with the instruction for sale contained on it,
                                 properly executed to the Subscription Agent.
                                 The Subscription Agent cannot attempt sales
                                 under instructions received later than 11:00
                                 a.m., New York City time, on the third Nasdaq
                                 trading day preceding the Expiration Date.
                                 There can be no assurance that the Subscription
                                 Agent will be able to sell any Rights or as to
                                 the price that the Subscription Agent will be
                                 able to obtain if it is able to effect any
 
                                        9
<PAGE>   12
 
                                 such sale. See "The Stock Offering -- Method of
                                 Transferring Rights."
 
How to Exercise Rights........   Rights may be exercised by properly completing
                                 and signing the Subscription Certificate and
                                 forwarding it, with payment of the Subscription
                                 Price for each share of Common Stock subscribed
                                 for pursuant to the Rights, to the Subscription
                                 Agent on or prior to the Expiration Date. THE
                                 SUBSCRIPTION AGENT MUST HAVE IMMEDIATELY
                                 AVAILABLE FUNDS ON THE EXPIRATION DATE FOR A
                                 SUBSCRIPTION TO BE VALID. Although personal
                                 checks will be accepted, if they have not
                                 cleared by the Expiration Date, the
                                 Subscription will not be valid. If the mail is
                                 used to forward Subscription Certificates and
                                 payment, it is recommended that insured,
                                 registered mail be used. Delivery will also be
                                 accepted by courier or by hand at the office of
                                 the Subscription Agent. No interest will be
                                 paid on subscription funds delivered to the
                                 Subscription Agent. See "The Stock Offering --
                                 Exercise of Rights." Once a holder of Rights
                                 has exercised his or her Rights, that exercise
                                 may not be revoked. See "The Stock
                                 Offering -- No Revocation."
 
How Foreign and Certain Other
  Stockholders Can Exercise
  Rights......................   In the event Subscription Certificates cannot
                                 be mailed to persons whose addresses are
                                 outside the United States or who have an APO or
                                 FPO address, such certificates will be held by
                                 the Subscription Agent for their account. To
                                 exercise their Rights, these holders must
                                 notify the Subscription Agent of their desire
                                 to exercise before 11:00 a.m., New York City
                                 time, on the third Nasdaq trading day preceding
                                 the Expiration Date, and must establish to the
                                 satisfaction of the Company that their exercise
                                 is permitted under applicable law. If such a
                                 holder does not notify the Subscription Agent
                                 and provide acceptable instructions to the
                                 Subscription Agent before that deadline, his or
                                 her Rights will be sold, if feasible, and the
                                 net proceeds, if in excess of $5.00 (after
                                 expenses of sale), will be remitted to such
                                 holder. Any net proceeds not distributed will
                                 be retained by the Company for general
                                 corporate purposes. See "The Stock
                                 Offering -- Foreign and Certain Other
                                 Stockholders."
 
Persons Holding Shares or
Warrants, or Wishing to
  Exercise Rights, Through
  Others......................   Persons holding shares of Common Stock or
                                 warrants and receiving the Rights distributed
                                 with respect thereto through a broker, dealer,
                                 commercial bank, trust company, or other
                                 nominee, as well as persons holding
                                 certificates of Common Stock or warrants
                                 personally who would prefer to have such
                                 institutions effect transactions relating to
                                 the Rights on their behalf, should contact the
                                 appropriate institution or nominee and request
                                 it to effect the transaction for them. See "The
                                 Stock Offering -- Exercise of Rights."
 
Warrant holders exercising
preemptive rights.............   The Company's warrant holders have preemptive
                                 rights that allow them to either purchase
                                 Common Stock under the terms of the IP Stock
                                 Issuance or receive Rights under the terms of
                                 the Rights
                                       10
<PAGE>   13
 
                                 Offering. Warrant holders who decide to
                                 purchase Common Stock directly under the terms
                                 of the IP Stock Issuance will have the
                                 opportunity to purchase one share per Common
                                 Stock equivalent share they hold at the same
                                 $16.75 per share price to be paid by IP. These
                                 warrant holders will be excluded from the
                                 Rights Offering. The total number of shares of
                                 Common Stock issuable to warrant holders is not
                                 affected by their decision to participate in
                                 the private sale under the terms of the IP
                                 Stock Issuance. The size of the Rights Offering
                                 will be reduced by the increased number of
                                 shares being purchased under the IP Stock
                                 Issuance, but the one for one distribution
                                 ratio for the Rights will not be changed.
 
Certain Federal Income
  Tax Considerations..........   In general, existing stockholders as of the
                                 Record Date (other than holders of shares of
                                 restricted Common Stock issued pursuant to the
                                 Company's stock incentive plans ("Restricted
                                 Stock") receiving Rights pursuant to the
                                 Employee Participation) most likely will not
                                 recognize taxable income in connection with the
                                 issuance to them or exercise by them of Rights.
                                 Holders of warrants who have exercised their
                                 preemptive rights most likely will not
                                 recognize taxable income, while holders of
                                 warrants who have not exercised preemptive
                                 rights in connection with the IP Stock Issuance
                                 and who are issued Rights pursuant to the
                                 Rights Offering most likely will be treated as
                                 having received a taxable distribution of the
                                 right to acquire shares of Common Stock and,
                                 accordingly, would recognize taxable income in
                                 connection with the issuance of Rights to them
                                 in an amount equal to the fair market value of
                                 the Rights distributed (determined at the time
                                 of issuance). Thereafter, holders of warrants
                                 will not recognize additional taxable income in
                                 connection with the exercise by them of the
                                 Rights. See "Certain Federal Income Tax
                                 Considerations."
 
EMPLOYEE PARTICIPATION
 
Terms of Participation........   Pursuant to the Employee Participation, the
                                 Company will distribute to each employee and
                                 consultant of the Company holding as of the
                                 Record Date vested and unvested stock options,
                                 or grants of shares of Restricted Stock, the
                                 same form of Right issued in the Rights
                                 Offering, except for contractual restrictions
                                 on transferability. The shares of Common Stock
                                 purchased under the Employee Participation by
                                 payment of the $16.75 Subscription Price and
                                 delivery of a subscription agreement will be
                                 subject to contractual restrictions, primarily
                                 a one-year restriction on transferability and a
                                 right of repurchase in favor of the Company.
                                 Under the terms of the Employee Participation,
                                 the Board of Directors has approved the payment
                                 of a portion of the Subscription Price in the
                                 form of a secured promissory note. The maximum
                                 amount of the loan by the Company will be
                                 determined based on a calculation of 66% of the
                                 value of the securities of the Company pledged
                                 in connection therewith. See "The Stock
                                 Offering -- Employee Participation."
 
Participation Procedures......   Employees and consultants may receive Rights in
                                 the Employee Participation only upon delivery
                                 of a participation agreement ("Employee
                                 Participation Agreement") in which they will
                                 agree the Rights are not transferable.
 
                                       11
<PAGE>   14
 
Subscription Price............   $16.75 per share of Common Stock.
 
Record Date...................               , 1998.
 
Expiration Date...............               , 1998, at 5:00 p.m., New York City
                                 time, unless extended. The Company may extend
                                 the Expiration Date, in its sole discretion,
                                 and will announce any extension by not later
                                 than 9:00 a.m., New York City time, on the
                                 business day following the previously scheduled
                                 Expiration Date. Any extension of the
                                 Expiration Date will be for at least three
                                 Nasdaq trading days. See "The Stock
                                 Offering -- Expiration Date."
 
Non-Transferability of
Rights........................   Rights distributed in the Employee
                                 Participation will not be transferable and
                                 "stop transfer" instructions will be given to
                                 the Subscription Agent. Any attempted transfers
                                 of a Right distributed in the Employee
                                 Participation will be void.
 
How to Exercise Rights
  Under Employee
  Participation...............   A Right issued under the Employee Participation
                                 may be exercised by properly completing and
                                 signing the Subscription Certificate and
                                 forwarding it, together with (i) payment of the
                                 Subscription Price, in the form of cash, an
                                 employee participation promissory note (a
                                 "Participation Note"), or a combination
                                 thereof, (ii) a Securities Pledge Agreement,
                                 and (iii) a Stock Subscription Agreement, to
                                 the Subscription Agent. THE SUBSCRIPTION AGENT
                                 MUST RECEIVE IMMEDIATELY AVAILABLE FUNDS, AND
                                 THE OTHER DOCUMENTATION, ON OR PRIOR TO THE
                                 EXPIRATION DATE. Additionally, if securities of
                                 the Company other than options, Restricted
                                 Stock, and Common Stock issuable upon exercise
                                 of the Rights are being pledged to secure a
                                 Participation Note, they must be received by
                                 the Company's Corporate Secretary before the
                                 Expiration Date. If mail is used to forward the
                                 documentation, it is recommended that insured,
                                 registered mail be used. Delivery will also be
                                 accepted by courier or by hand. No interest
                                 will be paid on subscription funds delivered to
                                 exercise Employee Participation Rights. Once a
                                 participant has exercised his or her Rights,
                                 that exercise may not be revoked. See "The
                                 Stock Offering -- No Revocation."
 
Certain Federal Income
  Tax Considerations..........   The Company believes that employees and
                                 consultants who are issued Rights in connection
                                 with the Employee Participation will not
                                 recognize gain or loss upon receipt of the
                                 Rights because the Rights should not be treated
                                 as having a readily ascertainable fair market
                                 value within the meaning of Treasury Regulation
                                 Section 1.83-7(b) when issued. However, each
                                 employee or consultant would recognize ordinary
                                 income at the time the Rights are exercised in
                                 an amount equal to the difference between the
                                 fair market value of the Common Stock (at the
                                 time of exercise) and the Subscription Price in
                                 accordance with Section 83 of the Internal
                                 Revenue Code of 1986, as amended (the "Code").
                                 See "Certain Federal Income Tax
                                 Considerations."
 
STANDBY COMMITMENT............   To the extent a sufficient number of Rights and
                                 warrant holder preemptive rights are not
                                 exercised to bring the Company $106.0 million
                                 in equity proceeds, IP has agreed to purchase
                                 up to
 
                                       12
<PAGE>   15
 
                                 6,328,358 shares of Common Stock, with the
                                 exact number being that number of shares
                                 necessary to bring the total proceeds of the
                                 Stock Offering, the exercise of warrant holder
                                 preemptive rights, and the Standby Commitment
                                 to $106.0 million. Any shares purchased
                                 pursuant to the Standby Commitment will be
                                 purchased privately at the Subscription Price
                                 under the terms and conditions of the Stock
                                 Purchase Agreement (as defined herein). IP
                                 Delaware and IP Bermuda are not participating
                                 in the Stock Offering.
 
                                 The Standby Commitment is in addition to IP's
                                 agreement to purchase a minimum of 5,611,940
                                 shares of Common Stock at $16.75, or
                                 approximately $94.0 million in the aggregate,
                                 pursuant to the IP Stock Issuance. The purpose
                                 of the Standby Commitment is to assure the
                                 Company of at least $200.0 million in proceeds
                                 from the sale of its Common Stock to complete
                                 the Acquisition.
 
                                 In consideration of the commitment to provide
                                 the Standby Commitment, IP, and an affiliate of
                                 Zurich, will receive a commitment fee,
                                 regardless of whether the Stock Offering and
                                 Standby Commitment are consummated, consisting
                                 of the Commitment Fee Warrants to purchase
                                 734,000 shares of Common Stock at $16.75 per
                                 share. The portion of the Commitment Fee
                                 Warrants to be issued to the Zurich affiliate
                                 is in consideration of certain financing
                                 commitments to IP II. Rights will not be issued
                                 to the recipients of the Commitment Fee
                                 Warrants.
 
                                  RISK FACTORS
 
     There are substantial risks in connection with this offering that should be
considered by prospective purchasers. See "Risk Factors."
 
                SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA
 
     The following table sets forth summary consolidated financial information
with respect to Superior National and BIG for the periods indicated. The
historical financial information was prepared in accordance with GAAP. The
financial information for Superior National as of March 31, 1998 and 1997 is
unaudited; however, in management's opinion, it includes all adjustments,
including normally occurring accruals, that are necessary for a fair
presentation of results for such interim periods. The financial information for
BIG as of March 31, 1998 and 1997 and as of December 31, 1995, 1994, and 1993,
as well as for the years ended December 31, 1994 and 1993, is unaudited. Interim
results are not necessarily indicative of results for the full year. The pro
forma consolidated statement of operations data for the three months ended March
31, 1998 and the year ended December 31, 1997 is unaudited and presents results
for the Company as if the Acquisition had been consummated as of the beginning
of each period presented.
 
     BIG is an indirect wholly owned subsidiary of FHS, and as a subsidiary is
not subject to the same financial reporting requirements, therefore audited
financial information is not available for all periods. Further, earnings per
share information is not meaningful.
 
     The pro forma information is presented for illustrative purposes only and
is not necessarily indicative of the results of operations or financial position
that would have occurred had the Acquisition been consummated on the dates
assumed, nor is the pro forma information intended to be indicative of the
Company's future results of operations.
 
                                       13
<PAGE>   16
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
 
                             SUMMARY FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                           THREE MONTHS
                                          ENDED MARCH 31,                 YEAR ENDED DECEMBER 31,
                                         -----------------   --------------------------------------------------
                                          1998      1997     1997(1)     1996      1995       1994       1993
                                         -------   -------   --------   -------   -------   --------   --------
                                            (UNAUDITED) (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                      <C>       <C>       <C>        <C>       <C>       <C>        <C>
STATEMENT OF OPERATIONS
REVENUES:
Net premiums earned....................  $30,587   $18,978   $140,920   $88,648   $89,735   $110,418   $153,585
         Total Revenues................   34,840    21,064    153,594    96,417    99,519    119,467    163,135
EXPENSES:
Claim and claim adjustment expenses,
  net of reinsurance...................   18,288    10,271     90,447    55,638    53,970     78,761    113,817
Underwriting and general and
  administrative expenses (e.g.,
  commissions).........................    9,991     7,004     37,695    34,138    29,447     21,660     28,778
         Total Expenses................   28,762    19,183    136,333    91,190    87,830    114,470    160,931
 
Income before income taxes, preferred
  securities dividends and accretion,
  discontinued operations,
  extraordinary items, and cumulative
  effect of change in accounting for
  income taxes.........................    6,078     1,881     17,261     5,227    11,689      4,997      2,204
Preferred securities dividends and
  accretion, net of income tax
  benefit..............................   (1,872)     (454)    (3,069)   (1,667)   (1,488)      (683)        --
Net income from continuing
  operations...........................  $ 3,767   $ 1,210   $ 10,824   $ 3,630   $11,701   $  3,599   $  2,734
                                         =======   =======   ========   =======   =======   ========   ========
 
BASIC EPS:
Per common share:
Income from continuing operations......  $  0.64   $  0.35   $   2.06   $  1.06   $  3.41   $   1.05   $   0.80
Weighted average shares outstanding....    5,874     3,447      5,250     3,433     3,430      3,430      3,430
 
DILUTED EPS:
Per common share:
Income from continuing operations......  $  0.48   $  0.23   $   1.54   $  0.75   $  2.97   $   0.70   $   0.58
Weighted average shares outstanding....    7,782     5,247      7,016     4,826     3,942      5,122      4,753
</TABLE>
 
<TABLE>
<CAPTION>
                                       AS OF MARCH 31,                         DECEMBER 31,
                                     -------------------   ----------------------------------------------------
                                       1998       1997     1997(1)      1996       1995       1994       1993
                                     --------   --------   --------   --------   --------   --------   --------
                                         (UNAUDITED)
                                                                   (IN THOUSANDS)
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET
ASSETS:
Total cash and investments
- -- carrying value..................  $228,535   $140,912   $242,116   $149,440   $163,951   $176,878   $150,179
- -- market value....................   228,535    140,912    242,116    149,440    166,103    172,706    156,744
Reinsurance receivables............    55,598     25,974     53,082     25,274     39,613     68,129     71,003
         Total Assets..............  $401,508   $297,984   $416,569   $306,569   $240,781   $286,776   $264,098
                                     ========   ========   ========   ========   ========   ========   ========
 
LIABILITIES AND STOCKHOLDERS'
  EQUITY:
Claim and claim adjustment
  expenses.........................  $180,333   $106,758   $201,255   $115,529   $141,495   $171,258   $171,038
         Total Liabilities.........   238,409    228,002    255,474    237,807    176,256    227,622    224,044
         Total Stockholders'
           Equity..................  $ 61,808   $ 45,724   $ 59,818   $ 45,191   $ 43,480   $ 40,364   $ 40,055
                                     ========   ========   ========   ========   ========   ========   ========
</TABLE>
 
- ------------------------------
(1) The information for the year ended December 31, 1997 includes the financial
    data of SPCC from April 1, 1997.
 
                                       14
<PAGE>   17
 
                         BUSINESS INSURANCE GROUP, INC.
 
                             SUMMARY FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                        THREE MONTHS
                                       ENDED MARCH 31,                   YEAR ENDED DECEMBER 31,
                                     -------------------   ----------------------------------------------------
                                       1998       1997       1997       1996       1995       1994       1993
                                     --------   --------   --------   --------   --------   --------   --------
                                         (UNAUDITED)                                            (UNAUDITED)
                                                                   (IN THOUSANDS)
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS
REVENUES:
Net premiums earned................  $139,612   $121,388   $515,272   $480,828   $390,974   $340,097   $233,341
         Total Revenues............   149,631    131,815    563,508    517,860    416,894    356,278    249,591
EXPENSES:
Claim and claim adjustment
  expenses, net of reinsurance.....   114,286     83,967    443,204    381,897    245,522    218,240    169,828
Underwriting and general and
  administrative expenses (e.g.,
  commissions).....................    42,132     32,105    168,187    107,640    114,918     75,364     49,262
         Total Expenses............   159,206    118,268    621,772    489,526    366,190    304,926    244,698
 
Income (loss) before income
  taxes............................    (9,575)    13,547    (58,264)    28,334     50,704     51,352      4,893
Net income (loss) from continuing
  operations.......................  $ (4,181)  $ 10,801   $(29,417)    25,400   $ 37,752   $ 37,520   $  6,354
                                     ========   ========   ========   ========   ========   ========   ========
</TABLE>
 
<TABLE>
<CAPTION>
                                   AS OF MARCH 31,                             DECEMBER 31,
                               -----------------------   --------------------------------------------------------
                                  1998         1997         1997         1996        1995       1994       1993
                               ----------   ----------   ----------   ----------   --------   --------   --------
                                     (UNAUDITED)                                   (UNAUDITED) (UNAUDITED) (UNAUDITED)
                                                                 (IN THOUSANDS)
<S>                            <C>          <C>          <C>          <C>          <C>        <C>        <C>
BALANCE SHEET
ASSETS:
Total cash and investments --
  carrying value.............  $  791,826   $  764,521   $  763,171   $  754,652   $529,515   $419,943   $362,133
  -- market value............     791,986      764,296      763,339      754,745    529,650    419,053    370,437
Reinsurance receivables......     216,101      158,507      229,521      136,109     81,545    104,573    119,050
         Total Assets........  $1,205,022   $1,119,383   $1,222,406   $1,093,773   $749,104   $627,855   $602,023
 
LIABILITIES AND STOCKHOLDER'S
  EQUITY:
Claim and claim adjustment
  expenses...................  $  713,473   $  611,105   $  728,421   $  590,595   $443,600   $412,666   $386,194
         Total Liabilities...     958,001      841,740      970,060      825,881    508,214    479,543    466,139
         Total Stockholder's
           Equity............  $  247,021   $  277,643   $  252,346   $  267,892   $240,890   $148,312   $135,884
                               ==========   ==========   ==========   ==========   ========   ========   ========
</TABLE>
 
                                       15
<PAGE>   18
 
     The unaudited pro forma combined financial data has been derived from the
unaudited pro forma combined financial statements and notes thereto included
elsewhere in this document and should be read in conjunction with those
financial statements and notes. The summary unaudited pro forma financial
information is not necessarily indicative of future operations and should not be
construed as representative of future operations of the combined companies.
 
                SUMMARY UNAUDITED PRO FORMA FINANCIAL STATEMENTS
                 ACQUISITION OF BUSINESS INSURANCE GROUP, INC.
                   BY SUPERIOR NATIONAL INSURANCE GROUP, INC.
 
                           PURCHASE ACCOUNTING METHOD
 
        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF INCOME
<TABLE>
<CAPTION>
                                  THREE MONTHS ENDED MARCH 31, 1998
                            ----------------------------------------------
                                                      PRO
                                                     FORMA
                                                    ADJUST-
                                                     MENTS          PRO
                            SUPERIOR                  INC.         FORMA
                            NATIONAL      BIG      (DECR.)(1)     COMBINED
                            --------   ---------   ----------     --------
                               (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                         <C>        <C>         <C>            <C>
REVENUES:
Net premiums earned.......  $30,587    $ 139,612   $(102,894)(j)  $67,305
Other income..............    4,253       10,019        (519)(a)   13,753
                            -------    ---------   ---------      -------
        Total Revenues....   34,840      149,631    (103,413)      81,058
EXPENSES:
Claim and claim adjustment
  expenses, net of
  reinsurance.............   18,288      114,286     (76,759)(j)   55,815
Underwriting and general
  and administrative
  expenses................    9,991       42,132     (34,470)(j)   17,653
Other expense.............      483        2,788        (309)(c)    2,417
                                                        (524)(d)
                                                      (2,359)(e)
                                                       2,338(b)
                            -------    ---------   ---------      -------
        Total Expenses....   28,762      159,206    (112,083)      75,885
                            -------    ---------   ---------      -------
Income (loss) before
  income taxes, preferred
  securities dividends and
  accretion, discontinued
  operations,
  extraordinary items, and
  cumulative effect of
  change in accounting for
  income taxes............    6,078       (9,575)      8,670        5,173
Income tax expense
  (benefit)...............    2,311       (5,394)      4,767(i)     1,684
                            -------    ---------   ---------      -------
Net income (loss) from
  continuing operations...    3,767       (4,181)      3,903        3,489
                            =======    =========   =========      =======
BASIC EPS:
Per common share:
Net income (loss) from
  continuing operations...  $  0.64                               $  0.20
Weighted average shares
  outstanding.............    5,874                                17,814
DILUTED EPS:
Per common share:
Net income (loss) from
  continuing operations...  $  0.48                               $  0.18
Weighted average shares
  outstanding.............    7,782                                19,722
 
<CAPTION>
                                           YEAR ENDED DECEMBER 31, 1997
                            -----------------------------------------------------------
                                                                   PRO
                                                                  FORMA
                                                                 ADJUST-
                                                                  MENTS          PRO
                             SUPERIOR       PAC                    INC.         FORMA
                            NATIONAL(3)    RIM(2)     BIG(3)    (DECR.)(1)     COMBINED
                            -----------   --------   --------   ----------     --------
                                     (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                         <C>           <C>        <C>        <C>            <C>
REVENUES:
Net premiums earned.......   $140,920     $ 19,507   $515,272    (379,755)(j)  $295,944
Other income..............     12,674        1,449     48,236      (1,996)(a)    60,363
                             --------     --------   --------   ---------      --------
        Total Revenues....    153,594       20,956    563,508    (381,751)      356,307
EXPENSES:
Claim and claim adjustment
  expenses, net of
  reinsurance.............     90,447       25,841    443,204     (12,000)(g)   264,194
                                                                 (283,298)(j)
Underwriting and general
  and administrative
  expenses................     37,695       10,769    168,187        (900)(f)    86,236
                                                                 (127,218)(j)
                                                                   (2,297)(h)
Other expense.............      8,191        1,595     10,381      (8,326)(e)    17,833
                                                                   (2,096)(d)
                                                                    9,350(b)
                                                                   (1,262)(c)
                             --------     --------   --------   ---------      --------
        Total Expenses....    136,333       38,205    621,772    (428,047)      368,263
                             --------     --------   --------   ---------      --------
Income (loss) before
  income taxes, preferred
  securities dividends and
  accretion, discontinued
  operations,
  extraordinary items, and
  cumulative effect of
  change in accounting for
  income taxes............     17,261      (17,249)   (58,264)     46,296       (11,956)
Income tax expense
  (benefit)...............      6,437          612    (28,847)     17,374(i)     (4,424)
                             --------     --------   --------   ---------      --------
Net income (loss) from
  continuing operations...     10,824      (17,861)   (29,417)     28,922        (7,532)
                             ========     ========   ========   =========      ========
BASIC EPS:
Per common share:
Net income (loss) from
  continuing operations...   $   2.06                                          $  (0.44)
Weighted average shares
  outstanding.............      5,250                                            17,190
DILUTED EPS:
Per common share:
Net income (loss) from
  continuing operations...   $   1.54                                          $  (0.40)
Weighted average shares
  outstanding.............      7,016                                            18,956
</TABLE>
 
- ------------------------------
(1) See explanatory notes to "Unaudited Pro Forma Financial Information."
 
(2) Pac Rim information is presented for the three months ended March 31, 1997
    (unaudited).
 
(3) Derived from audited financial statements.
 
                                       16
<PAGE>   19
 
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                               AS OF MARCH 31, 1998
                                                              -------------------------------------------------------
                                                                                           PURCHASE
                                                              SUPERIOR                    ACCOUNTING       PRO FORMA
                                                              NATIONAL       BIG        ADJUSTMENTS(1)      COMBINED
                                                              --------    ----------    --------------     ----------
<S>                                                           <C>         <C>           <C>                <C>
ASSETS:
Investments.................................................  $212,045    $  710,507      $ (29,658)(a)    $  882,894
                                                                                            (10,000)(b)
Cash and invested cash......................................    16,490        81,319         29,658(a)        163,071
                                                                                             10,194(b)
                                                                                             10,506(c)
                                                                                            107,000(e)
                                                                                            193,100(f)
                                                                                             (5,796)(g)
                                                                                           (285,000)(h)
                                                                                              5,600(i)
                                                              --------    ----------      ---------        ----------
        Total Investments...................................   228,535       791,826         25,604         1,045,965
Reinsurance receivables.....................................    55,598       216,101                          271,699
Premiums receivable.........................................    34,446        98,061                          132,507
Deferred policy acquisition costs...........................     5,987        24,681                           30,668
Goodwill....................................................    35,583        13,951        (13,951)(k)        35,583
Other assets................................................    41,359        60,402           (194)(b)        73,268
                                                                                            (10,506)(c)
                                                                                            (17,793)(j)
                                                              --------    ----------      ---------        ----------
        Total Assets........................................  $401,508    $1,205,022      $ (16,840)       $1,589,690
                                                              ========    ==========      =========        ==========
LIABILITIES AND STOCKHOLDERS' EQUITY:
Claim and claim adjustment expenses.........................  $180,333    $  713,473                       $  893,806
Unearned premiums...........................................    14,610        49,469                           64,079
Long-term debt..............................................        30       121,750      $(121,750)(d)       107,030
                                                                                            107,000(e)
Deferred credit -- negative goodwill........................                                 83,771(h)         57,627
                                                                                              5,600(i)
                                                                                            (17,793)(j)
                                                                                            (13,951)(k)
Accounts payable and other liabilities......................    43,436        73,309         (5,796)(g)       110,949
                                                              --------    ----------      ---------        ----------
        Total Liabilities...................................   238,409       958,001         37,081         1,233,491
Trust preferred securities..................................   101,291            --                          101,291
        Total Stockholders' Equity..........................    61,808       247,021        193,100(f)        254,908
                                                                                            121,750(d)
                                                                                           (368,771)(h)
                                                              --------    ----------      ---------        ----------
        Total Liabilities and Stockholders' Equity..........  $401,508    $1,205,022      $ (16,840)       $1,589,690
                                                              ========    ==========      =========        ==========
</TABLE>
 
- ------------------------------
(1) See explanatory notes to "Unaudited Pro Forma Financial Information."
 
                                       17
<PAGE>   20
 
                                  RISK FACTORS
 
     This Stock Offering involves a high degree of risk. In addition to the
other information set forth in this Prospectus, the following risk factors
should be considered carefully in evaluating the Company and its business before
purchasing any of the shares of Common Stock. Certain statements in this
Prospectus are forward-looking and are identified by the use of forward-looking
words or phrases such as "intended," "will be positioned," "expects," is or are
"expected," "anticipates," and "anticipated." These forward-looking statements
are based on the Company's current expectations. To the extent any of the
information contained in this Prospectus constitutes a "forward-looking
statement" as defined in Section 27A(i)(1) of the Securities Act, the risk
factors set forth below are cautionary statements identifying important factors
that could cause results to differ materially from those in the forward-looking
statement.
 
INHERENT UNCERTAINTIES RELATING TO CERTAIN EFFECTS OF THE ACQUISITION
 
     Recent Losses at BIG. On a consolidated basis, BIG incurred a net loss of
$29.4 million in the fiscal year ended December 31, 1997 and $4.2 million in the
three months ended March 31, 1998, with a very high combined ratio of 118.8% and
112.2%, respectively. A substantial portion of the 1997 losses were attributable
to a reserve strengthening of $75.2 million, booked in the fourth quarter of
1997, and related principally to accident years 1996 and prior and revised
estimates of claim severity from those years. The first quarter 1998 losses were
attributable to increased claim and claim adjustment expenses due to the
non-renewal of an aggregate excess of loss reinsurance treaty, and increasing
claim severity. As BIG's operations will now represent a substantial portion of
the Company's business, these losses should be viewed as applicable to the
Company's business going forward. There can be no assurance that such losses at
BIG will not be repeated in the future, and the Company's overall results would
reflect these losses. See " -- Uncertainty Associated with Estimating Reserves
for Unpaid Claim and Claim Adjustment Expenses." Although the Company believes
it can improve BIG's financial performance, there are no assurances the Company
will be successful in this regard.
 
     Decline in Premium at BIG. In the first quarter of 1998, BIG's direct
written premium in California decreased by $15.0 million, as compared to the
three-month period ended March 31, 1997, precipitated by a change in BIG's
underwriting and pricing criteria implemented for policies with inception dates
after January 1, 1998. Additional factors responsible for the decline were
uncertainties created by the pendency of the Acquisition and the recent
downgrade of BIG's rating by A.M. Best from "A-" to "B++." See "Business
Insurance Group, Inc. -- Business -- Underwriting." Further reductions in direct
written premium are likely to result as the Company re-underwrites BIG's book of
business over a period of three years or more, reflecting the Company's ongoing
strategy of preserving operating margins rather than competing for accounts
solely on the basis of price. If the Company were to experience declines in
premium volume substantially greater than expected, the Company's leadership
position in the California workers' compensation insurance market could be
threatened. Further, if the Company is unable to spread sufficient premium over
its fixed costs, that could have a material adverse impact on the Company's
earnings. See "Superior National -- Business -- Strategy."
 
     Coordination of Operations. The success of the Acquisition in enhancing
long-term stockholder value depends in part on the ability of the Company to
coordinate and integrate the operations and the business enterprises of the
Company and BIG. As in every business combination, such coordination will
require the dedication of management resources, which may temporarily divert
attention from the day-to-day business of the Company. In addition, integration
of BIG into the Company's information systems, which the Company believes would
enhance its competitive position, is a difficult and complex task given the
relative size of BIG's operations. There can be no assurance that the
coordination necessary to realize the expected benefits of the Acquisition will
be achieved. See "Superior National -- Business -- Information Services" and
"Business Insurance Group, Inc. -- Business -- Information Services."
 
     Negative Cash Flows. The Company expects that following the Acquisition it
will experience large negative cash flows. Negative cash flows have been
characteristic of the Company's business since the advent of open rating in
California at the beginning of 1995. Since then, claims arising under policies
written on the higher premium volumes that existed prior to 1995 have been
run-off while premium has decreased. The same
 
                                       18
<PAGE>   21
 
conditions could exist at BIG. The Company believes BIG sought to enhance its
competitiveness under open rating by aggressively pricing its products, and
that, as BIG's pricing structure is integrated into the Company's, premium
volume could decline while BIG's prior year claims are run-off. Moreover, a
recently-implemented three-year quota-share reinsurance treaty (the "Quota-Share
Arrangement") will result in additional negative cash flows. This negative cash
flow will result in reduced investment income. See "Superior
National -- Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Liquidity and Capital Resources."
 
     Change in Operating Strategy. The Company has, since reorganizing its
business in late 1993, operated as a workers' compensation insurer, with its
business focused almost entirely on California and Arizona. In 1997, 94% of the
Company's premium was written in California. Additionally, the Company has
concentrated its marketing on group programs and smaller accounts generating
less than $50,000 in annual premium, believing such accounts represent higher
margin business. The Acquisition marks a significant departure from these
strategies in that BIG is a multi-state carrier in workers' compensation
insurance. Further, BIG has traditionally marketed to larger accounts where
pricing has been more competitive. The Company's strategy will now also
encompass a focus on larger accounts, the use of reinsurance to mitigate the
pricing and persistency risk associated with these large accounts, and the
broadening of the geographic scope of its business. See "Superior
National -- Business -- Strategy." There can be no assurance that the Company
will successfully implement these strategies, or that the new strategies will
generate the expected financial benefits. If these financial benefits are not
realized, the expected advantages to the Company provided by the Acquisition may
be materially and adversely affected, with a resulting adverse impact on the
Company's financial performance.
 
     Realization of Economies of Scale. The Company has identified economies of
scale through the combination of the BIG and Superior Pacific businesses that it
believes can be achieved over a period of years. There can be no assurance that
the Company will be able to realize the expected economies of scale within any
particular time frame or at all, or to generate additional revenue to offset any
unanticipated inability to benefit from economies of scale. See "Superior
National -- Business -- Strategy."
 
     Dependence on Reinsurance. The Company's operating strategy after the
Acquisition includes the use of reinsurance through the Quota-Share Arrangement
to reduce the pricing and persistency risk the Company believes is associated
with the Company's plan to re-underwrite the large account book of business at
BIG. Additionally, the Loss Reserves Guarantee (as defined herein) will be
accomplished through BIG's purchase of reinsurance prior to Closing. As a result
of these transactions, the expected benefits of the Acquisition could be
materially and adversely affected if the reinsurers fail to perform their
obligations. See " -- Importance of Reinsurance" and "Acquisition of Business
Insurance Group, Inc. -- Loss Reserves Guarantee."
 
UNCERTAINTY ASSOCIATED WITH ESTIMATING RESERVES FOR UNPAID CLAIM AND CLAIM
ADJUSTMENT EXPENSES
 
     The reserves for unpaid claim and claim adjustment expenses established by
the Company and by BIG are estimates of amounts needed to pay reported and
unreported claim and related claim adjustment expenses based on facts and
circumstances then known. These reserves are based on estimates of trends in
claim frequency and severity, judicial theories of liability, market conditions,
and other factors. The establishment of adequate reserves is an inherently
uncertain process, and there can be no assurance that the ultimate liability
will not materially exceed the Company's reserves for claim and claim adjustment
expenses of Superior Pacific and BIG and have a material adverse effect on the
Company's results of operations and financial condition following the
Acquisition. Due to the inherent uncertainty of estimating reserve amounts, the
Company and BIG have found it necessary, and may over time continue to find it
necessary, to revise estimates of reserves for claim and claim adjustment
expenses in response to trends in claim frequency and severity, judicial
theories of liability, market conditions, and other factors. The historic
development of reserves for claim and claim adjustment expenses may not
necessarily reflect future trends in the development of these amounts.
Accordingly, it may not be appropriate to extrapolate redundancies or
deficiencies based on historical information. See "Superior
National -- Business -- Claim and Claim Adjustment Expense Reserves."
 
                                       19
<PAGE>   22
 
     The Company believes there is an industry-wide increase in claim severity
in California workers' compensation insurance. Although claim frequency has
declined as expected in light of benefit and claim reform after the advent of
open rating in 1995, if the Company is correct in viewing the increase in claim
severity for 1995 and subsequent accident years as a true trend and not an
aberration, then the assumptions underlying claim and claim adjustment expense
reserves established for the 1995 and subsequent accident years were flawed, and
the Company's reserves could therefore be materially understated. Thus, although
the Company has recently experienced reduced claim frequency, the impact of that
reduction has been outweighed, perhaps substantially, by an increase in claim
severity for injuries sustained in 1995 and thereafter. In response, the Company
has undertaken the Claim Severity Management Program. See "Superior
National -- Business -- Claim Severity Management Program." There can be no
assurance that the Company's severity management efforts will have the effect
the Company anticipates and, if they do not, the Company could be required to
book additional reserves for Superior Pacific for accident years 1995 and
subsequent. The Company sought the Loss Reserves Guarantee in the Acquisition
Agreement in part due to its concern that the increase in claim severity is an
industry-wide trend that is also being experienced at BIG. See "Acquisition of
Business Insurance Group, Inc. -- Loss Reserves Guarantee" and "Business
Insurance Group, Inc. -- Business -- Claim and Claim Adjustment Expenses."
However, as with Superior Pacific, the Company cannot be assured that the Loss
Reserves Guarantee is adequate, particularly if the negative trends in claim
severity turn out to be more severe at BIG than at Superior Pacific. If the Loss
Reserves Guarantee is not adequate, then the Company could be required to book
additional loss reserves with respect to losses incurred prior to the Closing.
It is in part due to the Company's view that the trends in claim severity are
more uncertain in larger-premium accounts that it has entered into (and has
required BIG to enter into) the Quota-Share Arrangement. See "Acquisition of
Business Insurance Group, Inc. -- Large Account Quota-Share Arrangement."
Although the Quota-Share Arrangement may mitigate to some degree ongoing pricing
and persistency risk of large premium accounts, the Company is relying solely on
the Claim Severity Management Program and the Loss Reserves Guarantee with
respect to historic risks, and it faces continuing uncertainty in estimating
reserves with respect to retained and new premiums.
 
UNCERTAIN PRICING AND PROFITABILITY
 
     One of the distinguishing features of the insurance industry, including the
workers' compensation insurance industry, is that its products generally are
priced before its costs are known because premium rates are determined before
losses are reported. Premium rate levels are related in part to the availability
of insurance coverage, which varies according to the level of surplus in the
industry. Increases in surplus have generally been followed by increased price
competition among workers' compensation insurers. For these reasons, together
with the commencement of open rating in January 1995, the California workers'
compensation insurance business in recent years has experienced very competitive
pricing conditions and there can be no assurance as to the Company's ability to
achieve adequate pricing for its policies. Further, changes in case law, the
passage of new statutes, or the adoption of new regulations relating to the
interpretation of insurance contracts can retroactively and dramatically affect
the liabilities associated with known risks after an insurance contract is in
place. Product enhancements also present special issues in establishing
appropriate premium levels in the absence of sufficient experience with such
products' performance. See "Superior National -- Business -- California Workers'
Compensation Market" and " -- Underwriting."
 
     The number of competitors and the similarity of products offered, as well
as regulatory constraints, limit the ability of workers' compensation insurers
to increase prices in response to declines in profitability or market demand. In
addition, the reported profits and losses of a workers' compensation insurance
company are also determined, in part, by the establishment of, and adjustments
to, reserves reflecting estimates made by management as to the amount of claim
and claim adjustment expenses that will ultimately be incurred in the settlement
of claims. The ultimate liability of the insurer for all claim and claim
adjustment expenses reserved at any given time will likely be more or less than
these estimates, and differences in the estimates may have a material adverse
effect on the insurer's financial position, results of operations, or cash flows
in the future periods. See "Superior National -- Business -- Claim and Claim
Adjustment Expense Reserves."
 
                                       20
<PAGE>   23
 
IMPORTANCE OF RATINGS
 
     A.M. Best, an independent insurance rating agency, assigned the Company a
"B+" (Very Good) rating in 1995, which the Company has continued to maintain. A
"B+" rating is assigned to companies having, on balance, in A.M. Best's opinion,
very good financial strength, operating performance, and market profile when
compared to the standards established by A.M. Best, and having a good ability to
meet their ongoing obligations to policyholders. "B+" is A.M. Best's sixth
highest rating classification out of 15 ratings. The Company's A.M. Best rating
is lower than that of many of its competitors. A.M. Best bases its ratings on
factors that concern policyholders and not necessarily upon factors concerning
investors. They are not recommendations to buy, sell, or hold securities and are
subject to change at any time. There can be no assurance that the Company's
rating or future changes therein will not affect the Company's competitive
position. See "Superior National -- Business -- Ratings." As of the date hereof,
BIG is maintaining a "B++" A.M. Best rating, having been lowered from "A-"
because of BIG's recent financial performance and other factors. There can be no
assurance that the Company's rating post-closing will be changed to reflect
BIG's rating, and, should BIG be assigned a "B+" rating following the
Acquisition, the further downgrade may have a material adverse effect on the
Company's financial condition and results of operations. See "Business Insurance
Group, Inc. -- Business -- Ratings."
 
IMPORTANCE OF REINSURANCE
 
     In order to reduce its underwriting risk, the Company follows the industry
practice of reinsuring a portion of its risks. In addition, reinsurance is an
important component of the Company's strategy to mitigate pricing and
persistency risks related to large premium accounts, and is the expected
mechanism for FHC to implement the Loss Reserves Guarantee. Reinsurance does not
relieve the Company of liability to its insureds for the risks ceded to
reinsurers. As such, the Company is subject to credit risk with respect to
amounts not recoverable from reinsurers. Although the Company places its
workers' compensation reinsurance with reinsurers that are "A" rated or higher
by A.M. Best and that the Company generally believes to be financially stable, a
significant reinsurer's insolvency or inability to make payments under the terms
of a reinsurance treaty could have a material adverse effect on the Company's
financial condition or results of operations.
 
     The amount and cost of reinsurance available to companies specializing in
workers' compensation insurance are subject, in large part, to prevailing market
conditions beyond the control of such companies. The Company's ability to
provide insurance at competitive premium rates and coverage limits on a
continuing basis depends upon its ability to obtain adequate reinsurance in
amounts and at rates that will not adversely affect its competitive position.
 
     Due to continuing market uncertainties regarding reinsurance capacity, no
assurances can be given as to the Company's ability to maintain its current
reinsurance facilities, which generally are subject to annual renewal. However,
the Quota-Share Arrangement adopted by the Company in connection with the
Acquisition has a three-year term with two one-year extension options. If the
Company is unable to renew its reinsurance facilities upon their expiration and
the pricing environment does not improve, the Company may need to reduce the
levels of its underwriting commitments. See "Superior
National -- Business -- Reinsurance and "Business Insurance Group,
Inc. -- Business -- Reinsurance."
 
CONCENTRATION OF OWNERSHIP
 
     Based upon the Common Stock outstanding as of the Record Date, assuming all
Rights are exercised with warrant holders exercising preemptive rights in full,
and assuming no outstanding warrants or stock options exercisable into shares of
Common Stock are exercised prior to the IP Stock Issuance and consummation of
the Stock Offering, 18,036,972 shares of Common Stock will be outstanding upon
consummation of the IP Stock Issuance and Stock Offering, of which the Company
believes approximately 9.6 million shares and approximately 2.6 million warrants
(approximately 53% of the total number of shares of Common Stock outstanding)
will be held in the aggregate by IP and certain related parties. In the unlikely
event that none of the Rights are exercised in the Stock Offering and 6,328,358
shares issuable thereunder are instead purchased by IP under the Standby
Commitment, then approximately 14.0 million shares (approxi-
 
                                       21
<PAGE>   24
 
mately 79% of the Common Stock outstanding) will be held in the aggregate by IP
and certain related parties. In addition, in that event Common Stock and
warrants to purchase Common Stock held by IP and related parties will represent
approximately 85.5% of the Company's equity securities on a diluted basis. As a
result, absent agreements to the contrary, these stockholders, acting together,
will have the potential to exercise control over the Company and the Board of
Directors. Further, such a concentration of ownership may have the effect of
delaying or preventing a change in control of the Company. However, IP and
certain related parties have agreed to certain limitations on their ability to
acquire additional equity securities of the Company and their voting power as
stockholders. Other than with respect to the election of directors of the
Company, IP and such parties have agreed that if the aggregate number of all
shares that are voted in like manner by IP and such parties shall be greater
than 35% of the total number of shares voted, then those votes that exceed such
35% threshold shall be voted in the same proportion as the other stockholders
voted their shares with respect to the same matter. However, the Board of
Directors could deem it to be in the best interests of the Company to waive,
limit, or revoke these limitations on IP, and that determination would result in
IP's having control over the Company. See "Acquisition of Business Insurance
Group, Inc. -- Financing of the Acquisition" and "Certain Relationships and
Related Transactions."
 
SIGNIFICANT OWNERSHIP BY AFFILIATES OF ZURICH AND RELATED PARTIES
 
     Certain affiliates of Zurich are limited partners of IP Delaware and IP
Bermuda and hold approximately 23% of the limited partnership interests in those
funds on an aggregate basis. They also hold a significant percentage of the
limited partnership interests in IP II. In addition, certain affiliates of
Zurich collectively own approximately 21% of the Common Stock, on a diluted
basis, and less than one percent of the issued and outstanding Common Stock on a
non-diluted basis. Further, International Insurance Investors, L.P. ("III"),
owns all of the outstanding Voting Notes (as defined herein) issued by the
Company. Certain affiliates of Zurich are limited partners of III and hold
approximately 32% of III's limited partnership interests. See "Security
Ownership of Certain Beneficial Owners and Management" and "Certain
Relationships and Related Transactions -- 1996 - 1997 Transactions with IP and
Limitations on Related Party Control." Five of the Company's eleven directors
either have relationships with, or became directors pursuant to rights to
nominate, directors held by such parties. Consequently, such parties have
significant influence over the management of the Company and have a significant
portion of the votes needed to approve any action requiring stockholder
approval, including adopting amendments to the Company's Certificate of
Incorporation and approving certain actions, such as mergers or sales of all or
substantially all of the Company's assets, which could materially affect the
Company's financial condition.
 
DILUTION OF OWNERSHIP
 
     The Company's current stockholders could experience dilution of their
ownership interest in the Company for several reasons. First, the issuance of
securities in the IP Stock Issuance will reduce the proportionate ownership of
other stockholders in the Company. In addition, a transfer of his or her Rights
may not compensate a stockholder for all or any part of any reduction in the
market value of such stockholder's Common Stock resulting from the Stock
Offering. Stockholders who do not exercise or sell their rights will relinquish
any value inherent in the Rights. Further, stockholders who do not exercise
their Rights (resulting in Common Stock being purchased under the Standby
Commitment) will experience a significant decrease in their proportionate
interest in the equity ownership and voting power of the Company. See
"Dilution."
 
     Additionally, the IP Stock Issuance and the Standby Commitment may be
regarded as dilutive to the Company's market value if at the time of these
issuances the market price exceeds the $16.75 per share price to be paid by IP.
However, because IP is required to perform its obligations at the $16.75 price
in any event, the IP Stock Issuance and the Standby Commitment may be accretive
if at the time of these issuances the $16.75 price exceeds the market price of
the Common Stock on Nasdaq. See "The Stock Offering -- Standby Commitment."
 
     Further, notwithstanding completion of the Acquisition, purchasers of
Common Stock exercising Rights in the Stock Offering will experience immediate
and substantial dilution in the net tangible book value per share attributable
to the shares of Common Stock they purchase. See "Dilution."
                                       22
<PAGE>   25
 
     The $16.75 Subscription Price and the identical price to be paid by IP in
the IP Stock Issuance were determined after negotiations between IP and
directors of the Company not affiliated with IP or Zurich, with the Company
having the opportunity to consult its financial advisors. The Subscription Price
does not necessarily bear any relationship to the book value of the Company's
assets, past operations, cash flow, earnings, financial condition, or any other
established criteria for value and should not be considered an indication of the
underlying value of the Company. The issuance of stock in the Equity Financings
nevertheless could be viewed as dilutive because the market price on the date
prior to the announcement of the Acquisition exceeded the Subscription Price by
15.3%, and the price of the Common Stock on August   , 1998 of $          ,
which presumably included some amount attributable to the value of the Rights,
exceeded the Subscription Price by      %. See "The Stock
Offering -- Determination of Subscription Price."
 
     After giving effect to the Equity Financings (and assuming no other
issuances of Common Stock, that warrant holders exercise preemptive rights in
full, and that all Rights are exercised), the Company will have 18,036,972
shares of Common Stock issued and outstanding, as compared with 5,876,368 shares
of Common Stock issued and outstanding as of June 30, 1998. See "Market Price
and Dividends on the Common Stock."
 
INCREASED DEBT
 
     The Company intends, as part of the financing of the Acquisition, to
undertake the Senior Notes Offering pursuant to which the Company will incur
approximately $110.0 million in senior debt. As a result of that increased debt
and the expected terms of the notes to be issued in that offering (the "Senior
Notes"), the Company's principal and interest payment obligations will be
increased substantially. As of March 31, 1998, the Company had $113.0 million of
long term debt outstanding, comprised of $105.0 million related to Preferred
Securities issued by an affiliate and $8.0 million in the form of a capital
lease. At March 31, 1998, the Company's ratio of earnings to fixed charges and
distributions on the Trust Preferred Securities was 1.84 to 1. See "Acquisition
of Business Insurance Group, Inc. -- Financing of the Acquisition."
 
     On a pro forma basis for the Acquisition, the Equity Financings, and the
issuance of Senior Notes, the Company will breach certain covenants in the
indenture pursuant to which the "Senior Subordinated Notes" underlying the Trust
Preferred Securities were issued. As a result, the Company is required to, and
will therefore seek to, obtain the consent of the holders of the Trust Preferred
Securities to the issuance of the Senior Notes. No assurance can be given that
such consent will be obtained. See "Acquisition of Business Insurance Group,
Inc. -- Governmental and Regulatory and Other Approvals."
 
     The indenture pursuant to which the Senior Notes are being issued (the
"Senior Notes Indenture") and the Senior Subordinated Notes indenture will not
permit the Company to incur substantially any additional indebtedness above and
beyond the Senior Notes, although it may be possible to raise additional funds
to pursue acquisitions of other workers' compensation insurance companies. The
Company believes that cash flow from operations and existing funds available for
payments of principal and interest will be adequate to permit the Company to
make its required payments of principal and interest on its indebtedness,
although there can be no assurance that this will be the case. To the extent
that cash flow from operations is insufficient to satisfy the Company's cash
requirements, the Company may seek to raise funds from additional borrowings or
equity financings, by restructuring, or by acquiring other businesses that would
provide cash flow (in all such cases to the extent permitted by these
indentures). See "Superior National -- Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Liquidity and Capital
Resources." There can be no assurance that such actions could be effected on
satisfactory terms, in a timely manner, or at all, that would enable the Company
to make any payments due on the Senior Notes or the Senior Subordinated Notes or
that any such actions would be permitted under the related terms of the Senior
Notes or the Senior Notes Indenture.
 
     The degree to which the Company is leveraged could have adverse
consequences, including the following: (i) a substantial portion of the
Company's cash flow from operations in the form of dividends from its
Subsidiaries must be dedicated to the payment of principal and interest on its
indebtedness, thereby reducing the funds available to the Company for other
purposes, (ii) the Company's ability to obtain additional financing in the
future for working capital, acquisitions or other purposes may be impaired,
(iii) certain of the
 
                                       23
<PAGE>   26
 
Company's borrowings may be at variable rates of interest, which would expose
the Company to the risk of higher interest rates, (iv) the Company's flexibility
in planning for or reacting to changes in market conditions may be limited, (v)
the Company may be substantially more leveraged than certain of its competitors,
which may place the Company at a competitive disadvantage, and (vi) the Company
may be more vulnerable in the event of a downturn in its business. The Company's
ability to satisfy its obligations will be dependent upon its future
performance, which will be subject to prevailing economic conditions and to
financial, business, and other factors, including factors beyond the control of
the Company.
 
VARIABILITY OF WORKERS' COMPENSATION INSURANCE BUSINESS
 
     The workers' compensation insurance business is affected by many factors
that can cause fluctuations in the results of operations of companies
participating in this business. Many of these factors are not subject to control
by the Company. For example, an economic downturn could result in an increase in
the number of claims and less demand for workers' compensation insurance. These
factors, together with competitive pricing and other considerations, could
result in fluctuations in the Company's underwriting results and net income. See
"Superior National -- Business -- Regulation" and "-- Ratings."
 
HIGHLY COMPETITIVE BUSINESSES
 
     The Company writes primarily workers' compensation insurance, which is a
highly competitive business. Some of the Company's competitors have
substantially greater financial and other resources than the Company, and there
can be no assurance the Company will be able to compete effectively against such
competitors in the future. Some of the Company's competitors are units of
financial services organizations having billions of dollars of assets. In the
event of a major reversal in the marketplace, such as a large, unanticipated
increase in industry-wide claim severity experience, the Company's competitors
that have access to substantial additional resources may be better able to
withstand the losses resulting from that reversal until conditions improve.
 
     The Company's competitors include other companies that, like the Company,
serve the independent producer market, as well as companies that sell insurance
directly to insureds. Direct writers may have certain competitive advantages
over writers using producers, including increased name recognition, loyalty of
the customer base to the insurer rather than to an independent producer, and,
potentially, reduced acquisition costs.
 
     Historically, the Company has concentrated on marketing to group programs
and smaller accounts, but, in part due to the SPCC acquisition, 57.9% of its
premium in force at March 31, 1998 was attributable to 925 non-group policies
and 291 group programs that provide estimated annual premium at inception of
$25,000 or more. BIG, by comparison, actively pursues larger accounts and at
March 31, 1998, 73.7% of BIG's overall premium in force was accounted for by
policies with estimated annual premium at inception of $25,000 or more.
Following the Closing, therefore, the Company will have to refocus its operating
strategy to more actively pursue accounts with very large annual premiums. The
market for large accounts is highly competitive, and the Company believes price
is the single most important factor such customers weigh in determining which
carrier will provide their workers' compensation insurance. In order to maintain
market leadership after the Acquisition, the Company may have to aggressively
price its offerings to large premium volume customers. If the premium collected
does not provide the Company with acceptable operating margins on the accounts,
this competitive environment could have a materially adverse effect on the
Company's results of operations. For at least three years, while re-underwriting
BIG's book of business, the Company intends to mitigate the pricing and
persistency risk associated with large accounts by maintaining the Quota-Share
Arrangement. During the period the Quota-Share Arrangement is in force, the
Company is subject to risks associated with reinsurance and its overall
financial performance will be dependent on the profitability of smaller
accounts. See "Superior National -- Business -- Competition" and
"-- Reinsurance."
 
                                       24
<PAGE>   27
 
GEOGRAPHIC CONCENTRATION
 
     After the Acquisition, on a pro forma basis, 73.6% of the Company's premium
will be written in the State of California. Consequently, the Company will
continue to be significantly affected by changes in the regulatory and business
climate in California. See "Superior National -- Business -- Regulation."
 
LIMITATION OF USE OF NET OPERATING LOSS CARRYFORWARDS
 
     As of March 31, 1998, the Company had available approximately $126.4
million in net operating loss carryforwards ("NOLs") to offset taxable income
recognized by it for periods after December 31, 1997. For federal income tax
purposes, these NOLs will expire in material amounts beginning in the year 2006.
In approving the Acquisition, the Board of Directors contemplated the fact that
the availability of a substantial portion of the NOLs could be limited and
deferred upon consummation of the Equity Financings, because of a "change in
ownership" under Section 382 of the Code. If a "change in ownership" is deemed
to have occurred, then the Company will be able to use a maximum of
approximately $8.0 million per year of its NOLs, together with additional
amounts to offset "built-in gains." Built-in gains are unrealized gains related
to appreciated property, including investments, owned by the Company. These
limitations may cause the availability of the NOLs to be deferred, causing the
Company to incur tax obligations when it otherwise would not, or may allow some
portions of the NOLs to expire before they can be used to reduce the Company's
tax obligations. The Company's tax obligation affects its cash position and
therefore will affect its ability to make payments on the Senior Notes and
Senior Subordinated Notes as they become due. See "Superior
National -- Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Taxes."
 
     The Company intends to remove the transfer restrictions currently
prohibiting a change in ownership under Section 382 of the Code. Thus, even if
the Equity Financings do not result in a change of ownership, it is likely that
subsequent events will result in the limitation and deferral of the availability
of NOLs described above. See "Description of Capital Stock -- Delaware
Anti-Takeover Law and Certain Charter Provisions."
 
FUTURE GROWTH AND CONTINUED OPERATIONS DEPENDENT ON ACCESS TO CAPITAL
 
     The underwriting of workers' compensation insurance is a capital intensive
business. The Company must maintain minimum levels of surplus in Superior
Pacific to continue to write policies and meet the other related standards
established by insurance regulatory authorities and insurance rating bureaus.
See "Superior National -- Business -- Regulation."
 
     The Company achieved premium growth in 1997 as a result of its acquisition
of SPCC. In addition to acquiring BIG, it intends to continue to pursue
acquisition and internal growth opportunities. Among the factors that may
restrict the Company's future growth is the availability of capital. Such new
capital will likely have to be obtained through debt or equity financing or
retained earnings. There can be no assurance that the Company will have access
to sufficient capital to support future growth and also satisfy the capital
requirements of rating agencies and regulators. In addition, the Company may
require additional capital to finance future acquisitions. See "Superior
National -- Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Liquidity and Capital Resources."
 
RISKS ASSOCIATED WITH INVESTMENTS
 
     The Company's results of operations depend in part on the performance of
its invested assets. As of March 31, 1998, virtually all of the Company's and
BIG's investment portfolio was invested in investment-grade, fixed-income
securities. Certain risks are inherent in connection with fixed-income
securities, including loss upon default, price volatility in reaction to changes
in interest rates, and general market factors, and, in the case of certain
asset-backed securities, prepayment and reinvestment risk. See "Superior
National -- Business -- Investments."
 
                                       25
<PAGE>   28
 
COMPREHENSIVE STATE REGULATION
 
     The Company and BIG are subject to comprehensive regulation by state
government agencies wherever they are licensed. The nature and extent of that
regulation typically involve prior approval of the acquisition of control of an
insurance company or of any company controlling an insurance company, regulation
of certain transactions entered into by an insurance company with any of its
affiliates, limitations on dividends, filing of premium rates and policy forms,
solvency standards, minimum amounts of capital and surplus that must be
maintained, limitations on types and amounts of investments, restrictions on the
size of risks that may be insured by a single company, limitation of the right
to cancel or nonrenew policies in some lines, regulation of the right to
withdraw from markets, requirements to participate in residual markets,
licensing of insurers and agents, deposits of securities for the benefit of
policyholders, reporting and satisfying certain regulatory standards with
respect to financial condition, and other matters. In addition, state insurance
department examiners perform periodic financial and market conduct examinations
of insurance companies and dictate the accounting practices to be used by
insurance companies when reporting to regulatory authorities. Such regulation is
generally intended for the protection of policyholders rather than stockholders
or other security holders. No assurance can be given that future legislative or
regulatory changes will not adversely affect the Company. See "Superior
National -- Business -- Regulation."
 
HOLDING COMPANY STRUCTURE; DIVIDEND AND OTHER RESTRICTIONS
 
     Superior National is a holding company whose principal asset is the capital
stock of its Subsidiaries and BIG will similarly be established as a Subsidiary.
The Company relies primarily on dividends and other payments from SNIC and SPCC,
and will rely on dividends from the BIG Insurance Subsidiaries, to meet its
obligations to creditors and to pay corporate expenses, including the principal
and interest on the Senior Notes and dividends on the Trust Preferred
Securities. SNIC, SPCC, CBIC, and CalComp are domiciled in the State of
California, which limits the payment of dividends and other distributions by
insurance companies. An insurance subsidiary may pay a dividend to the extent it
exceeds the greater of (a) net income from operations for the preceding year or
(b) 10% of statutory policyholders' surplus as of the preceding December 31.
CCIC is domiciled in the State of New York, which has similar restrictions.
Additionally, in ordinary circumstances, a two-year moratorium is placed on
dividend payments by a subsidiary that has undergone a change in control. The
Company has requested of the California Department of Insurance ("DOI"), and
expects to receive, a waiver from this moratorium in connection with its
acquisition of CalComp and the other BIG Insurance Subsidiaries. Further, state
insurance laws and regulations require that the statutory surplus of an
insurance company, following any dividends or distribution by such company, be
reasonable in relation to its outstanding liabilities and adequate for its
financial needs. See "Superior National -- Business -- Regulation" and " --
Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."
 
DEPENDENCE UPON PRODUCERS
 
     The Company and BIG depend on outside producers to provide it with
insurance business. The renewal rights of all of such business written are owned
by the producers, not by the insurer. While the Company believes that its
relationships with its producers are generally excellent, and believes that
relations between BIG and its producers are strong, there can be no assurance
that producers will not move business currently written by either the Company or
BIG to another carrier. If renewal rates were to drop significantly as a result
of producers moving business to other carriers, or if producers were to deliver
less business of the type the Company prefers to underwrite, then the earnings
of the Company could be adversely affected.
 
     Approximately $39.3 million (26.8%), $47.0 million (25.0%), and $44.0
million (26.0%) of Superior Pacific's direct written premium for the years ended
December 31, 1997, 1996, and 1995, respectively, was derived from its ten
leading producers. BIG's top ten producers accounted for 18.5% of direct written
premium in fiscal 1997. The loss of any of these producers could have a material
adverse effect on the Company. Eight of the Company's top 50 producers in
California and Arizona are also among the top 50 producers for BIG. See
"Superior National -- Business -- Marketing" and "Business Insurance Group,
Inc. -- Business -- Marketing."
                                       26
<PAGE>   29
 
COMBINED CARE BENEFITS
 
     BIG has, through CBIC in California and BICO in Utah, marketed a program of
"24-hour care," providing its insured's employees with workers' compensation
insurance and group health benefits. The combined care benefits business
constituted 1.2% of BIG's direct written premium in 1997. This business can be
adversely affected by several factors that are not necessarily subject to
control by the Company. For example, market acceptance of the concept of 24-hour
care, the combination into a single program of group health insurance with
workers' compensation insurance, has been weaker than expected to date. Since
first offering this product in December of 1995, BIG has not been able to
achieve sufficient market penetration to achieve pricing that would generate
acceptable operating margins. The Company is inexperienced in the group health
benefits business and may therefore be poorly positioned to operate that
business profitably after the Acquisition. If the Company cannot achieve
adequate operating margins, it may incur costs in restructuring or selling the
group health benefits business. These factors, together with competitive pricing
and other considerations, could result in fluctuations in the Company's
underwriting results and net income. See "Business Insurance Group,
Inc. -- Business -- Combined Care Benefits."
 
PARTICIPATING POLICIES
 
     BIG uses participating policies that pay policyholder dividends as a
marketing tool to sell workers' compensation insurance outside of California.
The Company anticipates continuing this practice following the Acquisition.
Participating policies may result in payment of dividends to the policyholder at
the conclusion of the policy term. Policyholder dividends may be based on a flat
percentage of premium, or more commonly, several factors relating to loss
experience.
 
     BIG has a limited history of issuing participating workers' compensation
insurance policies in states outside of California. As policies that have been
as issued as participating expire and come up for dividend consideration, BIG
would perform a calculation based on its dividend plan, and its board of
directors would declare policyholder dividends based on current loss experience.
Any adverse loss development occurring on policies for which a policyholder
dividend has been declared and paid could have a negative adverse impact on
BIG's financial condition and results of operations. To the extent that
producers and policyholders expect BIG to declare and pay policyholder dividends
according to the policyholder dividend proposals at the inception of the
policies, if the loss experience of accounts written on a participating basis do
not support a policyholder dividend declarations, this could have a negative
adverse impact on BIG's producer support and marketing efforts and could result
in a negative impact on BIG's financial condition and results of operations. See
"Business Insurance Group, Inc. -- Business -- Underwriting."
 
IRREVOCABILITY OF SUBSCRIPTIONS
 
     The election to exercise Rights is irrevocable by the electing stockholder.
Until certificates representing shares of Common Stock are delivered,
subscribing holders may not be able to sell the newly purchased shares.
Certificates representing shares of Common Stock purchased in the Stock Offering
will be delivered by mail as soon as practicable following the Closing, which is
expected to occur two to three weeks after the Expiration Date. No interest will
be paid on funds delivered to the Subscription Agent to exercise Rights covering
the time from payment until the delivery of stock certificates. If the
Acquisition is not consummated, no interest would be earned on the money
delivered to the Subscription Agent, however, all funds delivered to the
Subscription Agent would be returned. See "The Stock Offering -- Exercise of
Rights" and "-- No Revocation."
 
DEPENDENCE ON KEY PERSONNEL IN CONNECTION WITH FUTURE SUCCESS
 
     The future success of the Company depends significantly upon the efforts of
certain key management personnel, including William L. Gentz, a director and the
President and Chief Executive Officer; J. Chris Seaman, a director, an Executive
Vice President, and the Chief Financial Officer; and Arnold J. Senter, an
Executive Vice President and the Chief Operating Officer. A loss of any of these
officers or other key
 
                                       27
<PAGE>   30
 
employees could materially and adversely affect the Company's business. See
"Superior National -- Management -- Executive Officers."
 
MARKET CONSIDERATIONS
 
     Until the Registration Statement is declared effective, there will be no
public market for the Rights. Although the Company has been advised by certain
broker-dealers that they intend to make a market in the Rights, they are under
no obligation to do so, and any market making activity may be discontinued at
any time. Although the Company believes the Rights will be transferable and
listed on Nasdaq, there can be no assurance that the Rights will have any
economic value or that a public market for the Rights will develop or be
sustained. There also can be no assurance that, following the issuance of the
Rights and of the underlying shares upon exercise of Rights, a subscribing
stockholder will be able to sell shares of Common Stock purchased in the Stock
Offering at a price equal to or greater than the Subscription Price.
 
     Transfer of the Rights issued as part of the Employee Participation portion
of the Stock Offering will be contractually barred, which means that they will
have no economic value to the employees and consultants receiving them unless
they are exercised.
 
     The market price of the Common Stock is likely to be highly volatile and
could be subject to wide fluctuations in response to factors such as actual or
anticipated variations in the Company's results of operations, new products or
services introduced by the Company or its competitors, changes in financial
estimates by securities analysts, general market conditions, and other factors.
Further, stock markets, and in particular Nasdaq, have experienced extreme price
and volume fluctuations that have particularly affected the market prices of
equity securities of corporations like the Company with relatively low "float"
and that often have been unrelated or disproportionate to the operating
performance of the affected corporations. There can be no assurance that the
trading price and price-to-earnings ratios seen in the equity markets generally
will be sustained. These broad market factors may adversely affect the market
price of the Common Stock. These market fluctuations, as well as general
economic, political, and market conditions, such as recessions or interest rates
fluctuations, may adversely affect the market price of the Common Stock. In the
past, following periods of volatility in the market price of a corporation's
securities, securities class action litigation has often been instituted.
Litigation, if instituted, could result in substantial costs and a diversion of
management's attention and resources, which would have a material adverse effect
on the Company's business, results of operations, and financial condition. See
"Market Price of and Dividends on the Common Stock."
 
YEAR 2000 COMPLIANCE
 
     A significant percentage of the software that runs most of the computers in
the United States relies on two-digit date codes to perform a number of
computation and decision making functions. These computer programs may fail from
an inability to interpret date codes properly, misreading "00" for the year 1900
instead of the year 2000. Insurance policies with a January 1, 2000 or later
expiration date could be affected by a Year 2000 malfunction. The Company
believes that its Year 2000 program, anticipated to be completed no later than
December 31, 1998, will result in its proprietary operating systems and
application software programs being Year 2000 compliant in all material
respects, though there can be no assurance in that regard. See "Superior
National -- Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Year 2000 Strategy." The Company has received certain
representations from FHC as to BIG's Year 2000 compliance program. While the
Company believes that BIG's Year 2000 Compliance program will result in the
operating systems and application software used by BIG being Year 2000 compliant
in all material respects, there can be no assurance in that regard. See
"Business Insurance Group, Inc. -- Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Year 2000 Strategy."
 
     Although the Company has not received any claims made under policies
written in its P&C insurance business (discontinued in 1993) related to business
losses caused by Year 2000 malfunctions or costs incurred in connection with
prevention or correction of Year 2000 problems, it is conceivable that such
claims could be made. Published estimates of Year 2000 business losses and costs
are in the many billions of dollars. If P&C insurers were required by court
decision to pay claims on policies issued between 1985 and 1993 related to
 
                                       28
<PAGE>   31
 
Year 2000 losses the Company may have to pay such claims. In such event, the
Company would likely have inadequate reserves in its discontinued operations and
the booking of additional reserves would have a material adverse effect on the
Company's results of operations.
 
REGISTRATION OF ADDITIONAL SHARES; SHARES ELIGIBLE FOR FUTURE SALE
 
     Sales of substantial amounts of shares of Common Stock in the public market
after the Equity Financings, or the perception that such sales could occur, may
adversely affect the market price of the Common Stock and the Company's ability
to raise capital in the future in the equity markets. Upon completion of the
Equity Financings, and assuming all Rights are exercised, the Company will have
outstanding 18,036,972 shares of Common Stock, assuming no exercise prior to
Closing of any outstanding options or warrants. Of these shares, approximately
8,835,980 will be freely tradeable without restriction or limitation under the
Securities Act, except for any shares purchased by "affiliates," the resale of
which shall be subject to the volume limitations of Rule 144. Shares issued
through the Employee Participation, due to certain contractual restrictions,
will be non-transferable for a period of one year. The remaining 9,199,003
shares of Common Stock estimated to be outstanding will be "restricted
securities" within the meaning of Rule 144. These shares do not include an
aggregate of approximately 2,879,821 shares issuable upon exercise of warrants.
A significant portion of these shares may be eligible for sale under Rule 144
immediately upon exercise, subject to the volume limitations set forth in Rule
144. Additionally, the Company has granted registration rights to each holder of
warrants. Shares eligible for future sale also include approximately 2.4 million
shares issued to IP Delaware, IP Bermuda, TJS Partners, L.P. ("TJS"), and
certain members of the Company's management in April 1997 (the "1997 Shares").
The 1997 Shares are now eligible for sale under Rule 144, subject to the volume
limitations set forth in Rule 144. Additionally, the Company has granted
registration rights to IP Delaware and IP Bermuda with respect to the 1997
Shares they acquired. Furthermore, the Company has approximately 1,605,250
shares of Common Stock reserved for issuance pursuant to equity incentive plans,
under which options to purchase 567,829 shares of Common Stock have been granted
as of June 30, 1998. Common Stock issuable under these plans will be registered
or exempt from registration when issued. Subsequent to the Acquisition, the
Company intends, subject to stockholder approval, to increase the total number
of shares of Common Stock reserved for issuance under equity incentive plans by
an additional 1.5 million shares of Common Stock, and to create a new Stock
Purchase Plan permitting the issuance of up to 500,000 additional shares, and to
register the future issuance of such shares. See "Shares Eligible for Future
Sale."
 
                                       29
<PAGE>   32
 
                                USE OF PROCEEDS
 
     Because it is likely a number of Rights will not be exercised, the Company
expects the gross proceeds from the sale of the Common Stock offered hereby, and
if necessary the Standby Commitment, to be approximately $106.0 million. The
Company intends to use the proceeds of the Stock Offering, together with
approximately $110.0 million of gross proceeds obtained from the Senior Notes
Offering and approximately $94.0 million of gross proceeds obtained from the IP
Stock Issuance, to acquire BIG from FHC for $285.0 million in cash. See
"Acquisition of Business Insurance Group, Inc." The amounts obtained from the
Equity Financings and the Senior Notes Offering in excess of $285.0 million will
be used for transaction costs in connection with the Acquisition and the related
financing transactions, for capital for the Company's insurance subsidiaries,
and for general corporate purposes.
 
                                       30
<PAGE>   33
 
                                 CAPITALIZATION
 
     Set forth below is the capitalization of the Company at March 31, 1998 and
the capitalization of the Company at March 31, 1998, as adjusted to give effect
to the Stock Offering, the IP Stock Issuance, and the Senior Notes Offering and
the application of proceeds from them as described in "Use of Proceeds."
 
<TABLE>
<CAPTION>
                                                                     MARCH 31, 1998
                                                              -----------------------------
                                                                             AS ADJUSTED
                                                                               FOR THE
                                                                            SENIOR NOTES
                                                                              OFFERING
                                                                               AND THE
                                                               ACTUAL     EQUITY FINANCINGS
                                                              --------    -----------------
                                                                     (IN THOUSANDS)
<S>                                                           <C>         <C>
Long-term debt..............................................  $     30        $     30
Senior Notes................................................        --         107,000(1)
Trust Preferred Securities..................................   101,291         101,291
Stockholders' Equity:
  Common Stock, $.01 par value; authorized 25,000,000
     shares; issued and outstanding 5,874,379 shares; and
     17,814,677 shares issued and outstanding as adjusted
     for the Equity Financings..............................        59             178
  Paid-in capital excess of par.............................    34,257         227,238(2)
  Paid-in capital -- warrants...............................     2,206           2,206
  Unrealized gain on investments, net of taxes..............     1,407           1,407
  Retained earnings.........................................    23,879          23,879
                                                              --------        --------
Net stockholders' equity....................................    61,808         254,908
                                                              --------        --------
Total capitalization........................................  $163,129        $463,229
                                                              ========        ========
</TABLE>
 
- ---------------
(1) Net of estimated transaction costs of approximately $3.0 million, including
    underwriting discounts and commissions.
 
(2) Net of transaction costs associated with the Equity Financings of
    approximately $6.9 million.
 
                                       31
<PAGE>   34
 
               MARKET PRICE OF AND DIVIDENDS ON THE COMMON STOCK
 
     The Common Stock is listed and traded on Nasdaq under the trading symbol
"SNTL." Nasdaq is a highly-regulated electronic securities market comprised of
competing market makers whose trading is supported by a communications network
linking them to a quotation dissemination, trade reporting, and order execution
system. This market also provides specialized automation services for
screen-based negotiations of transactions, on-line comparison of transactions,
and a range of informational services tailored to the needs of the securities
industry, investors and issuers. Nasdaq consists of two distinct market tiers:
Nasdaq and The Nasdaq SmallCap Market. Nasdaq is operated by The Nasdaq Stock
Market, Inc., a wholly owned subsidiary of the National Association of
Securities Dealers, Inc. Set forth below are the quarterly high and low closing
sale prices for the Common Stock as reported to the Company by those
broker-dealers believed by the Company to be most active in making a market in
the Common Stock. As the Common Stock was not approved for listing on Nasdaq
until March 5, 1996, quotations prior to the Company's being listed on Nasdaq
are inter-dealer prices (giving effect to the May 25, 1995 four-into-one reverse
stock split) without retail mark-up, mark-down, or commission, and may not
necessarily represent actual transactions.
 
<TABLE>
<CAPTION>
                                                              HIGH      LOW
                                                             ------    ------
<S>                                                          <C>       <C>
1998
  Second quarter...........................................  $25.75    $17.75
  First quarter............................................  $21.19    $14.25
1997
  Fourth quarter...........................................  $15.25    $14.00
  Third quarter............................................  $15.50    $13.25
  Second quarter...........................................  $13.63    $11.63
  First quarter............................................  $15.25    $11.25
1996
  Fourth quarter...........................................  $13.75    $ 9.88
  Third quarter............................................  $10.75    $ 7.13
  Second quarter...........................................  $ 8.00    $ 4.87
  First quarter............................................  $ 5.63    $ 4.87
1995
  Fourth quarter...........................................  $ 6.00    $ 4.75
  Third quarter............................................  $ 5.50    $ 4.75
  Second quarter...........................................  $ 5.00    $ 4.00
  First quarter............................................  $ 5.40    $ 4.60
</TABLE>
 
     As of June 30, 1998, the number of stockholders of record of Common Stock
was 245 and 5,876,368 shares of Common Stock were outstanding. The closing sales
price per share of Common Stock on June 30, 1998 was $23.50. The closing sales
price per share of Common Stock on May 4, 1998, the date immediately prior to
the public announcement of the Acquisition was $20.50.
 
     The Company believes the increase in price in the third and fourth quarters
of 1996 and the first quarter of 1997 was primarily due to the announcement of
the Pac Rim Transaction. The Pac Rim Transaction was completed on April 11,
1997. The Company also believes the increase in price in the second quarter of
1998 was primarily due to the announcement of the Acquisition and the Stock
Offering.
 
     The Company's current policy is to retain its earnings for use in its
business; it has paid no cash dividends to its stockholders in its two most
recent fiscal years and has no present intention of paying cash dividends to its
Common stockholders in the foreseeable future. The payment of dividends in the
future is subject to the discretion of the Board of Directors and will depend on
the Company's operating results, financial condition and capital requirements,
general business conditions, and other relevant factors, including legal
restrictions applicable to the payment of dividends by SNIC and SPCC. The
California Insurance Code restricts the dividends or distributions an insurance
subsidiary may pay in any 12-month period to the greater of (a) net income from
operations for the preceding year or (b) 10% of statutory policyholders' surplus
as of the
 
                                       32
<PAGE>   35
 
preceding December 31. Payments of greater amounts require the approval of the
DOI. Because the Company conducts no substantial business other than through
SNIC and SPCC, the Company would be dependent upon dividends from SNIC and SPCC
in order to pay dividends to the Company's stockholders. Similar dividend
payment restrictions will govern BIG's Insurance Subsidiaries after the
Acquisition.
 
                                    DILUTION
 
     The unaudited net tangible book value of the Common Stock as of March 31,
1998 was approximately $26.2 million, or $4.46 per share. See "Capitalization."
"Net tangible book value per share" represents the amount of total tangible
assets less total liabilities divided by the number of shares of Common Stock
outstanding. After giving effect to the consummation of the Equity Financings
(assuming full exercise of the Rights and/or warrant holder preemptive rights),
and after deducting the estimated offering expenses, including the Commitment
Fee Warrants, the unaudited net tangible book value of the Company as of March
31, 1998, would have been approximately $277.0 million, or $15.35 per share.
This represents an immediate increase in unaudited net tangible book value of
$10.89 per share to persons holding shares of Common Stock prior to the exercise
of the Rights and an immediate dilution of $1.40 per share to holders of Common
Stock purchased upon issuance of the Rights. The following table illustrates
this per share dilution at March 31, 1998.
 
<TABLE>
<S>                                                           <C>
Subscription Price..........................................  $16.75
                                                              ======
Unaudited net tangible book value per share at March 31,
  1998......................................................  $ 4.46
Increase per share attributable to purchasers in the Equity
  Financings................................................   10.89
                                                              ------
  Unaudited net tangible book value per share after the
     Stock Offering.........................................   15.35
                                                              ======
  Dilution per share to purchasers in the Equity
     Financings(1)..........................................  $ 1.40
                                                              ======
</TABLE>
 
- ------------------------------
(1) Dilution is determined by subtracting the unaudited pro forma net tangible
    book value per share from the Subscription Price paid by purchasers in the
    Equity Financings.
 
     The foregoing assumes no exercise of outstanding options or warrants prior
to the Expiration Date. In addition, the Company treats shares of Restricted
Stock as to which restrictions have not lapsed as authorized but unissued. No
restrictions will lapse with respect to Restricted Stock granted prior to the
Expiration Date. At December 31, 1997, options to purchase 461,079 shares of
Common Stock were outstanding with a weighted average exercise price of $7.17
per share. At December 31, 1997, the Company also had existing warrants to
purchase 1,566,465 and 579,356 shares of Common Stock with exercise prices of
$4.00 and $5.20, respectively. The foregoing also does not take into account any
contribution to net tangible book value as a result of the Acquisition.
 
                                       33
<PAGE>   36
 
                 ACQUISITION OF BUSINESS INSURANCE GROUP, INC.
 
THE ACQUISITION
 
     The Company has entered into the Acquisition Agreement to acquire BIG from
FHC for aggregate consideration of approximately $285.0 million in cash. BIG is
a holding company that, through its subsidiaries, writes workers' compensation
and group health insurance, principally in California, with regional and branch
operations throughout the continental United States. Under the Acquisition
Agreement, at the Closing, BIG will become a wholly owned subsidiary of the
Company. As a result, the BIG Insurance Subsidiaries will become indirect
operating subsidiaries of the Company. BICO, currently a wholly owned subsidiary
of BIG, will be sold to Zurich Centre Group LLC immediately after the Closing.
Prior to such sale the Company will transfer the operating assets, liabilities,
and infrastructure of BICO into Superior Pacific. The Company will thereafter
continue to issue policies outside of California through CCIC and through BICO
via an underwriting arrangement with an affiliate of Zurich. In connection with
the Acquisition, FHC is obligated prior to Closing to cause all of BIG's
intercompany balances and real estate holdings related to FHC and its parent,
FHS, and their affiliates to be settled in cash. The Acquisition and related
financing transactions are expected to close two to three weeks after the
Expiration Date of the Stock Offering.
 
BUSINESS INSURANCE GROUP, INC.
 
     For the year ended December 31, 1997, and the three months ended March 31,
1998, BIG had net premiums earned of $515.3 million and $139.6 million,
respectively, and had losses, excluding realized gains and interest charges, of
approximately $28.3 million and $2.0 million, respectively. Prior to 1995, BIG
was exclusively a California insurer and BIG's business continues to be
concentrated in California, accounting for approximately 68.2% of in force
estimated annual premium as of March 31, 1998. However, in anticipation of
regulatory reforms and the elimination of minimum rate laws in 1995, BIG began
to pursue national growth opportunities and currently writes business in 42
states through a network of 37 regional and branch offices. BIG is licensed in
49 states and the District of Columbia. Through March 31, 1998, approximately
31.8% of BIG's estimated annual premium was written outside of the State of
California. BIG has historically written policies with average annual premium
greater than those of the Company's, as demonstrated by an average annual
premium per policy of approximately $16,200 as opposed to approximately $8,300
for Superior National in the year ended December 31, 1997. See "Business
Insurance Group, Inc. -- Business -- Marketing."
 
FINANCING OF THE ACQUISITION
 
     The Acquisition of BIG will be financed by the Company with a combination
of equity and debt. The Company has commenced the Stock Offering described in
this Prospectus, with expected proceeds of $106.0 million. Additionally, IP will
purchase, upon stockholder approval, $94.0 million of Common Stock in the IP
Stock Issuance. IP has also agreed to provide the Standby Commitment to purchase
that number of shares of Common Stock necessary to bring the total number of
shares sold, when combining the Stock Offering and the Standby Commitment, to
6,328,358, so that the total proceeds of the Stock Offering and the Standby
Commitment are $106.0 million (less any proceeds obtained through exercise of
preemptive rights by warrant holders), thus assuring the Company of $200.0
million in total in the Equity Financings to complete the Acquisition. The
Company also intends to complete the Senior Notes Offering in the aggregate
principal amount of $110.0 million. The interest rate and due date of the senior
notes will be determined in negotiations between the Company and the
underwriters of the Senior Notes Offering. The amounts obtained from the Senior
Notes Offering and the Equity Financings in excess of $285.0 million will be
used for transaction costs in connection with the Acquisition and these
financing transactions, for capital for the Company's insurance subsidiaries,
and for general corporate purposes.
 
                                       34
<PAGE>   37
 
RATIONALE FOR THE ACQUISITION
 
     The Acquisition, the Equity Financings, and the Senior Notes Offering
reflect the Company's belief that several substantial benefits will arise from
these transactions:
 
     - The Company will be the largest private sector workers' compensation
       carrier in California, based on available data on 1997 direct written
       premium.
 
     - While increasing its presence in California, the Company will also
       diversify geographically by acquiring BIG's non-California book of
       business, thereby lessening its dependence on the California market for
       workers' compensation insurance.
 
     - The Company will have the opportunity to improve BIG's financial
       performance by implementing the Company's underwriting policies, applying
       its expertise in information systems, and using reinsurance to mitigate
       financial and integration risk during the transition period immediately
       following the Acquisition.
 
     - The Company will benefit from economies of scale over a period of years,
       potentially realizing cost savings as a result.
 
     - The Company will reduce its financial leverage due to the additional
       equity provided by the Equity Financings.
 
     - The Company will strengthen its relationship with IP, providing
       opportunities for additional acquisitions and continued growth.
 
LOSS RESERVES GUARANTEE
 
     In connection with the Acquisition, FHC has agreed to obtain at its expense
guarantees on BIG's claim and claim adjustment expense reserves (the "Loss
Reserves Guarantee"). The Loss Reserves Guarantee covers $150.0 million in
reserves for losses incurred prior to December 31, 1997, and an additional $25.0
million for losses incurred through the Closing. Under the Acquisition
Agreement, FHC is permitted to cause BIG to purchase reinsurance to fulfill the
Loss Reserves Guarantee. The amount paid by BIG for reinsurance would then be
deducted from the price paid to FHC by the Company. Using the proceeds of the
Equity Financings and the Senior Notes Offering, the Company will contribute
capital to BIG following the Closing to offset any reductions in surplus arising
out of the purchase of reinsurance.
 
LARGE ACCOUNT QUOTA-SHARE ARRANGEMENT
 
     Separately, effective May 1, 1998, the Company and BIG each entered into
the three-year Quota-Share Arrangement with a reinsurer under which each will
cede all risks with an estimated annual premium at each risk's inception date of
$25,000 or more. Continuation of the Quota-Share Arrangement by BIG is
contingent on the Closing. The Company believes there is significantly more
pricing and persistency risk associated with policies with larger annual premium
amounts. The use of the Quota-Share Arrangement will allow the Company to
re-underwrite this business over time to the Company's underwriting standards
while preserving BIG's relationships with producers and insureds. Additionally,
because the Quota-Share Arrangement will reduce net written premium, the
Company's and BIG's ratio of net written premium to statutory surplus will
decrease.
 
DISPOSITION OF BICO
 
     The Company has entered into a letter of intent to sell BICO to Zurich
Centre Group, LLC, an affiliate of Zurich, immediately after the completion of
the Acquisition. Under the letter of intent, Superior Pacific will assume BICO's
insurance business and liabilities, receive assets with a fair market value
equal to the liabilities assumed, and receive additional consideration equal to
BICO's statutory capital and surplus, plus the value of BICO's charter and
licenses, at the sale date. After the sale of BICO, an affiliate of Zurich
intends to recapitalize BICO and enter into a five-year underwriting arrangement
with Superior Pacific under which Superior Pacific will be given the right to
produce up to $50.0 million in estimated annual premium on BICO's
                                       35
<PAGE>   38
 
policy forms in exchange for an underwriting fee equal to 2.5% of direct written
premium plus a pass through of all related expenses. The Company intends to
retain BICO's business and employees within the Superior National organization,
and will use the underwriting arrangement, together with other BIG Insurance
Subsidiaries acquired in the Acquisition, to continue, and attempt to expand,
BIG's national workers' compensation insurance operations.
 
     The sale of BICO is contingent upon a number of conditions, including the
completion of a due diligence investigation by Zurich Centre Group LLC,
execution of definitive documents by September 1, 1998, completion of the
Acquisition, approval from state insurance regulators, the execution of other
related agreements, and other customary conditions.
 
SERVICE AGREEMENTS
 
     In connection with the Acquisition Agreement, the Company and BIG will
enter into long-term service agreements (the "Service Agreements") with various
subsidiaries of FHC that are not being sold to Superior National. These
agreements include medical bill review, PPO utilization, certain managed care
services, claim negotiation and review, recruitment of employees, placement of
temporary workers, and transitional corporate administrative services. The
Service Agreements will have minimum terms of five years.
 
CONSEQUENCES IF THE COMPANY FAILS TO COMPLETE THE ACQUISITION
 
     In the event FHC meets all of its conditions precedent to the sale of BIG
to the Company, and the Company then fails to complete the Acquisition, such
event would likely have a material adverse effect on the Company. In such
circumstances, if the Company is deemed to have wrongfully failed to close the
Acquisition, it could be liable to FHC for a $15.0 million payment and
additional monetary damages. Further, the Commitment Fee Warrants are payable,
even if the Acquisition and the Equity Financings do not take place.
 
     If the Acquisition is not consummated, all funds received by the
Subscription Agent in the Stock Offering will be returned, but without interest.
 
GOVERNMENTAL AND REGULATORY AND OTHER APPROVALS
 
     The Acquisition requires the approval of the departments of insurance in
the States of California, Delaware, and New York, and notice filings in other
states. The Company has already made the requisite filings in order to obtain
such approval, including an application to the New York Department of Insurance.
If approval in New York is not obtained, the Acquisition will proceed without
the inclusion of CCIC. While the Company is confident of obtaining approval in
New York, as of the date of this Prospectus, all necessary regulatory approvals
have not yet been obtained. The Acquisition is also subject to the expiration of
the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended. Additionally, the holders of the Trust Preferred Securities
issued by a Subsidiary of the Company are being requested to consent to the
issuance of the Senior Notes. The Company expects to obtain all such approvals.
 
ACCOUNTING TREATMENT
 
     The Acquisition is to be treated as a purchase for accounting purposes. See
"Unaudited Pro Forma Financial Information."
 
                                       36
<PAGE>   39
 
                   UNAUDITED PRO FORMA FINANCIAL INFORMATION
 
     The following Unaudited Pro Forma Financial Information of the Company for
the three months ended March 31, 1998 and the year ended December 31, 1997
presents the results of operations for the Company as if the Acquisition had
been consummated as of the beginning of each period presented. The pro forma
adjustments are based on available information and certain assumptions the
Company currently believes are reasonable in the circumstances. The Unaudited
Pro Forma Financial Information has been derived from and should be read in
conjunction with the historical Consolidated Financial Statements and Notes of
the Company for the three months ended March 31, 1998 (unaudited) and the year
ended December 31, 1997 and the historical Combined Financial Statements and
Notes of BIG for the three months ended March 31, 1998 (unaudited) and the year
ended December 31, 1997 contained elsewhere herein, and should be read in
conjunction with the accompanying Notes to Unaudited Pro Forma Financial
Information.
 
     The pro forma information is presented for illustrative purposes only and
is not necessarily indicative of the results of operations that would have
occurred had the Acquisition been consummated on the dates assumed, nor is the
pro forma information intended to be indicative of the Company's future results
of operations.
 
                                       37
<PAGE>   40
 
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                      AS OF MARCH 31, 1998
                                                     ------------------------------------------------------
                                                                                PURCHASE
                                                     SUPERIOR                  ACCOUNTING        PRO FORMA
                                                     NATIONAL       BIG       ADJUSTMENT(1)       COMBINED
                                                     --------    ----------   -------------      ----------
<S>                                                  <C>         <C>          <C>                <C>
ASSETS
  Investments:
    Bonds and notes:
      Available-for-sale, at market................  $210,065    $  656,829     $                $  866,894
      Held-to-maturity, at amortized value.........        --        14,020                          14,020
    Equity securities, at market...................     1,980            --                           1,980
    Real estate....................................        --        29,658       (29,658)(a)            --
  Note from parent.................................        --        10,000       (10,000)(b)            --
  Cash and short-term, at market...................    16,490        81,319        29,658(a)        163,071
                                                                                   10,194(b)
                                                                                   10,506(c)
                                                                                  107,000(e)
                                                                                  193,100(f)
                                                                                   (5,796)(g)
                                                                                 (285,000)(h)
                                                                                    5,600(i)
                                                     --------    ----------     ---------        ----------
         Total investments.........................   228,535       791,826        25,604         1,045,965
Reinsurance receivables............................    55,598       216,101                         271,699
Premiums receivable................................    21,655        75,906                          97,561
Earned but unbilled premiums receivable............    12,791        22,155                          34,946
Accrued investment income..........................     2,331        11,092          (194)(b)        13,229
Deferred policy acquisition costs..................     5,987        24,681                          30,668
Income tax receivable..............................        --        10,506       (10,506)(c)            --
Deferred income taxes..............................    12,428        17,793       (17,793)(j)        12,428
Funds held by reinsurer............................     4,186            --                           4,186
Prepaid reinsurance premiums.......................     5,381            --                           5,381
Goodwill...........................................    35,583        13,951       (13,951)(k)        35,583
Prepaid and other..................................    17,033        21,011                          38,044
                                                     --------    ----------     ---------        ----------
         Total Assets..............................  $401,508    $1,205,022     $ (16,840)       $1,589,690
                                                     ========    ==========     =========        ==========
LIABILITIES AND STOCKHOLDERS' EQUITY
Claim and claim adjustment expenses................  $180,333    $  713,473                      $  893,806
Unearned premiums..................................    14,610        49,469                          64,079
Reinsurance payable................................     7,383        24,571                          31,954
Long-term debt.....................................        30       121,750     $(121,750)(d)       107,030
                                                                                  107,000(e)
Deferred credit -- negative goodwill...............                                83,771(h)         57,627
                                                                                    5,600(i)
                                                                                  (17,793)(j)
                                                                                  (13,951)(k)
Policyholder dividends.............................     1,370         2,823                           4,193
Capital lease......................................     7,191            --                           7,191
Accounts payable and other liabilities.............    27,492        45,915        (5,796)(g)        67,611
                                                     --------    ----------     ---------        ----------
         Total Liabilities.........................   238,409       958,001        37,081         1,233,491
Trust preferred securities.........................   101,291            --                         101,291
Stockholders' equity
Common stock.......................................    34,316       167,416       193,100(f)        227,416
                                                                                 (167,416)(h)
Paid-in capital warrants...........................     2,206            --                           2,206
Accumulated other comprehensive income.............                                                      --
Unrealized gain on investments, net of taxes.......     1,407         3,726        (3,726)(h)         1,407
Retained earnings..................................    23,879        75,879       121,750(d)         23,879
                                                                                 (197,629)(h)
                                                     --------    ----------     ---------        ----------
         Total Stockholders' Equity................    61,808       247,021       (53,921)          254,908
                                                     --------    ----------     ---------        ----------
         Total Liabilities and Stockholders'
           Equity..................................  $401,508    $1,205,022     $ (16,840)       $1,589,690
                                                     ========    ==========     =========        ==========
</TABLE>
 
Footnotes on following page
 
                                       38
<PAGE>   41
 
- ------------------------------
(1) Description of Pro Forma Adjustments
 
(a) Adjustment represents the sale of real estate to FHS at current book value,
    pursuant to the Acquisition Agreement.
 
(b) Adjustment represents FHC's repayment of an intercompany promissory note
    including principal and interest, pursuant to the Acquisition Agreement.
 
(c) Adjustment represents repayment of the income tax receivable due BIG by FHC,
    pursuant to the Acquisition Agreement.
 
(d) Adjustment represents FHC's forgiveness of intercompany debt at the time of
    the Acquisition, pursuant to the Acquisition Agreement.
 
(e) Adjustment represents the sale of Senior Notes, net of transaction costs, in
    connection with the Acquisition.
 
(f)  Adjustment represents the Equity Financings, net of transaction costs, in
     connection with the Acquisition.
 
(g) Adjustment to settle intercompany payable arising in the ordinary course of
    business with FHS, pursuant to the Acquisition Agreement.
 
(h) Adjustment represents payment of $285.0 million to FHC for acquisition of
    BIG and corresponding adjustment to Common Stock and additional paid-in
    capital to reflect the elimination of BIG's stockholders' equity interest.
 
(i)  Adjustment represents the sale of BICO to Zurich Centre Group LLC for
     estimated proceeds of $5.6 million. The Company will retain BICO's
     insurance business, infrastructure, liabilities, and employees.
 
(j)  Adjustment represents the elimination of the deferred tax asset related to
     the election under Section 338(h) of the Code taken by FHC.
 
(k) Adjustment represents the elimination of BIG's goodwill existing prior to
    the Acquisition.
 
                                       39
<PAGE>   42
 
                        PRO FORMA FINANCIAL INFORMATION
  ACQUISITION OF BUSINESS INSURANCE GROUP, INC. BY SUPERIOR NATIONAL INSURANCE
                                  GROUP, INC.
                           PURCHASE ACCOUNTING METHOD
       UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
<TABLE>
<CAPTION>
                                  THREE MONTHS ENDED MARCH 31, 1998
                          -------------------------------------------------
                                                     PRO
                                                    FORMA
                                                   ADJUST-
                                                    MENTS           PRO
                           SUPERIOR                 INC.           FORMA
                           NATIONAL      BIG      (DECR)(1)      COMBINED
                          ----------   --------   ---------     -----------
                          (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
<S>                       <C>          <C>        <C>           <C>
REVENUES:
Net premiums earned.....  $   30,587   $139,612    (102,894)(j) $    67,305
Net investment income
  and capital gains.....       4,253      9,853        (519)(a)      13,587
Other income............          --        166                         166
                          ----------   --------   ---------     -----------
        Total
          Revenues......      34,840    149,631    (103,413)         81,058
EXPENSES:
Claim and claim
  adjustment expenses,
  net of reinsurance....      18,288    114,286     (76,759)(j)      55,815
Underwriting and general
  and administrative
  expenses..............       9,991     42,132     (34,470)(j)      17,653
Policyholder
  dividends.............                    120                         120
Goodwill amortization...         304        309        (309)(c)        (220)
                                                       (524)(d)
Interest expense........          --      2,359      (2,359)(e)       2,338
                                                      2,338(b)
Other expense...........         179         --          --             179
                          ----------   --------   ---------     -----------
        Total
          Expenses......      28,762    159,206    (112,083)         75,885
                          ----------   --------   ---------     -----------
Income (loss) before
  income taxes,
  preferred securities
  dividends and
  accretion,
  discontinued
  operations,
  extraordinary items,
  and cumulative effect
  of change in
  accounting for income
  taxes.................       6,078     (9,575)      8,670           5,173
Income tax expense
  (benefit).............       2,311     (5,394)      4,767(i)        1,684
                          ----------   --------   ---------     -----------
Income (loss) before
  preferred securities
  dividends and
  accretion, and
  extraordinary items...  $    3,767   $ (4,181)  $   3,903     $     3,489
                          ==========   ========   =========     ===========
BASIC EPS:
Per Common Share:
Net income (loss).......  $     0.64                            $      0.20
Weighted average shares
  outstanding...........   5,874,054                             17,814,353
DILUTED EPS:
Per Common Share:
Net income (loss).......  $     0.48                            $      0.18
Weighted average shares
  outstanding...........   7,781,614                             19,721,912
OTHER DATA (UNAUDITED):
EBITDA..................       6,601                                  7,748
Ratio of earnings to
  fixed charges and
  distributions on
  preferred
  securities............                                              1.55x
Ratio of EBITDA to
  distributions on
  preferred
  securities............                                              1.84x
Ratio of preferred
  securities to
  EBITDA................                                             13.07x
 
<CAPTION>
                                           YEAR ENDED DECEMBER 31, 1997
                          --------------------------------------------------------------
                                                                  PRO
                                                                 FORMA
                                                                ADJUST-
                                                                 MENTS           PRO
                           SUPERIOR        PAC                   INC.           FORMA
                          NATIONAL(2)    RIM(3)       BIG      (DECR)(1)      COMBINED
                          -----------   ---------   --------   ---------     -----------
                              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
<S>                       <C>           <C>         <C>        <C>           <C>
REVENUES:
Net premiums earned.....  $  140,920    $  19,507   $515,272    (379,755)(j) $   295,944
Net investment income
  and capital gains.....      12,674        1,449     44,724      (1,996)(a)      56,851
Other income............          --           --      3,512                       3,512
                          ----------    ---------   --------   ---------     -----------
        Total
          Revenues......     153,594       20,956    563,508    (381,751)        356,307
EXPENSES:
Claim and claim
  adjustment expenses,
  net of reinsurance....      90,447       25,841    443,204     (12,000)(g)     264,194
                                                                (283,298)(j)
Underwriting and general
  and administrative
  expenses..............      37,695       10,769    168,187        (900)(f)      86,236
                                                                  (2,297)(h)
                                                                (127,218)(j)
Policyholder
  dividends.............          --        1,006        793                       1,799
Goodwill amortization...       1,039           --      1,262      (1,262)(c)      (1,057)
                                                                  (2,096)(d)
Interest expense........       6,335          589      8,326      (8,326)(e)      16,274
                                                                   9,350(b)
Other expense...........         817           --         --          --             817
                          ----------    ---------   --------   ---------     -----------
        Total
          Expenses......     136,333       38,205    621,772    (428,047)        368,263
                          ----------    ---------   --------   ---------     -----------
Income (loss) before
  income taxes,
  preferred securities
  dividends and
  accretion,
  discontinued
  operations,
  extraordinary items,
  and cumulative effect
  of change in
  accounting for income
  taxes.................      17,261      (17,249)   (58,264)     46,296         (11,956)
Income tax expense
  (benefit).............       6,437          612    (28,847)     17,374(i)       (4,424)
                          ----------    ---------   --------   ---------     -----------
Income (loss) before
  preferred securities
  dividends and
  accretion, and
  extraordinary items...  $   10,824    $ (17,861)  $(29,417)  $  28,922     $    (7,532)
                          ==========    =========   ========   =========     ===========
BASIC EPS:
Per Common Share:
Net income (loss).......  $     2.06                                         $     (0.44)
Weighted average shares
  outstanding...........   5,249,736                                          17,190,034
DILUTED EPS:
Per Common Share:
Net income (loss).......  $     1.54                                         $     (0.40)
Weighted average shares
  outstanding...........   7,016,165                                          18,956,463
OTHER DATA (UNAUDITED):
EBITDA..................      24,749                                               3,791
Ratio of earnings to
  fixed charges and
  distributions on
  preferred
  securities............                                                           0.47x
Ratio of EBITDA to
  distributions on
  preferred
  securities............                                                           0.20x
Ratio of preferred
  securities to
  EBITDA................                                                          26.72x
</TABLE>
 
Footnotes on following page
                                       40
<PAGE>   43
 
- ------------------------------
(1) Description of Pro Forma Adjustments.
 
(a) Adjustment represents the elimination of net investment income for real
    estate sold to FHC and interest on the promissory note from FHC, pursuant to
    the Acquisition Agreement.
 
(b) Adjustment represents estimated interest expense on the $110.0 million of
    Senior Notes issued in conjunction with the Acquisition. The Company is
    using an estimated interest rate of 8.5% for purposes of this calculation.
 
(c) Adjustment represents the elimination of the amortization of BIG's goodwill
    existing prior to the Acquisition.
 
(d) Adjustment represents the amortization of the negative goodwill (deferred
    credit) on a straight line basis over 27.5 years.
 
(e) Adjustment represents the elimination of the interest expense associated
    with $121.7 million of intercompany debt that will be settled by FHC at the
    time of the Acquisition.
 
(f)  Adjustment represents elimination of a one-time charge for the
     discontinuance of the executive deferred compensation plan.
 
(g) Adjustment represents a portion of the adverse development recorded in 1997
    by Pac Rim for accident years 1995 and prior. The recording of adverse
    development amounts in Pac Rim's 1996 and 1997 Statement of Operations was
    required by regulatory authorities as a condition to the Company's
    acquisition of Pac Rim.
 
(h) Adjustment represents the cost reductions expected to be achieved under the
    Company's business plan to integrate the operations of Pac Rim into Superior
    Pacific, based upon cost reductions achieved during the remainder of 1997.
 
<TABLE>
<CAPTION>
                                                              FIRST THREE MONTHS
                                                                1997 COMBINED
                                                              PROJECTED SAVINGS
                                                              ------------------
                                                                (IN THOUSANDS)
<S>                                                           <C>
Payroll reductions for the elimination of duplicative
  personnel (A).............................................        $1,556
Cancellation of data processing outsourcing agreement (B)...           213
Sublease of excess office space at current market price.....           237
Elimination of other duplicative corporate costs including
  outside audit fees, executive travel, director and
  officers insurance, payroll processing, and cancellation
  of line of credit (C).....................................           248
Rate differential between SNIC's excess of loss reinsurance
  treaties and Pac Rim reinsurance treaties.................            43
                                                                    ------
                                                                    $2,297
                                                                    ======
</TABLE>
 
     (A) Upon consummation of the Pac Rim Transaction, the Company immediately
         began the process of absorbing the operations of Pac Rim into the
         Company's existing operations. At the time the Pac Rim Transaction was
         announced the Company had approximately 360 employees and Pac Rim had
         approximately 270 employees.
 
         Within nine months following the consummation of the Pac Rim
         Transaction, approximately 225 employees of Pac Rim were released or
         resigned. The remaining employees have been retained.
 
         Immediately upon consummation of the Pac Rim Transaction and subsequent
         to the consummation of the Pac Rim Transaction, the Company added staff
         to its existing operations to support the operations acquired from Pac
         Rim. As of nine months following the Pac Rim Transaction, the Company
         had completed its staff increases, and was performing substantially all
         of the administrative functions in its Calabasas, California
         headquarters. The net increase in staff by the Company related to the
         Pac Rim Transaction was approximately 30 employees. The Pac Rim
         employees terminated included substantially all of its executive
         management. The additional employees added by the Company were
         primarily line employees.
 
         In preparing the pro-forma salary adjustment, the ongoing salary
         expenses relating to the new employees hired were included. These
         salary costs are expected to represent the level of salaries needed to
         manage the operations acquired from Pac Rim on an ongoing basis.
 
     (B) In 1992, Pac Rim entered into an agreement with an outside vendor to
         assume substantially all of its data processing responsibilities.
         During 1996, Pac Rim paid approximately $1.7 million to the outside
         vendor for services provided. The Company, at the time of the Pac Rim
         Transaction, terminated the contract and has assumed all data
         processing responsibilities for Pac Rim's operations.
 
                                       41
<PAGE>   44
 
     (C) Represents savings from the elimination of certain duplicate services
         that both the Company and Pac Rim contracted out or obtained through
         outsourcing agreements. These savings have been presented net of
         projected cost increases to the Company because additional costs are
         expected to arise as a result of the Pac Rim Transaction.
 
(i)  Adjustment represents the tax effect of the pro forma adjustments,
     excluding goodwill.
 
(j)  Adjustment represents the Quota-Share Arrangement entered into May 1, 1998
     in connection with the Acquisition of BIG. Under the terms of the
     Quota-Share Arrangement both Superior Pacific and BIG cede 100% of the
     premiums and losses for policies with an estimated annual premium of
     $25,000 or greater at inception.
 
(2) The results of Superior National for the year ended December 31, 1997
    include the results of Pac Rim for periods subsequent to April 1, 1997.
 
(3) Pac Rim was acquired on April 11, 1997. The results of operations presented
    are for the period January 1, 1997 through March 31, 1997.
 
                                       42
<PAGE>   45
 
                               THE STOCK OFFERING
 
     Superior National is distributing in the Stock Offering (i) to holders of
record as of the Record Date of shares of Common Stock (excluding IP Delaware
and IP Bermuda) and outstanding warrants to purchase Common Stock (excluding
certain warrant holders as discussed below), one transferable subscription Right
to purchase a share of Common Stock for the Subscription Price of $16.75 for
each share of Common Stock or Common Stock equivalent held and (ii) to each
employee and consultant of the Company holding vested and unvested stock
options, or granted shares of Restricted Stock, all of which were issued
pursuant to the Company's stock incentive plans, the same form of Right issued
in the Rights Offering, excepting contractual restrictions on transferability.
The closing of the Stock Offering is conditioned upon completion of the
Acquisition.
 
     The Company also has entered into the Stock Purchase Agreement with IP
pursuant to which, subject to certain conditions, IP has provided the Standby
Commitment. The Company will pay a fee in the form of the Commitment Fee
Warrants, exercisable to purchase 734,000 shares of Common Stock at a purchase
price of $16.75, in consideration for the Standby Commitment. No Rights will be
issued to the recipients of the Commitment Fee Warrants.
 
THE RIGHTS
 
     The Company is distributing transferable Rights at no cost to the record
holders of its Common Stock (excluding IP Delaware and IP Bermuda) and warrants
to purchase Common Stock (excluding certain warrant holders as discussed below)
as of the close of business on the Record Date. One Right will be distributed
for each share of Common Stock or, in the case of warrant holders, Common Stock
equivalent, held on the Record Date. Separately, the Company will distribute the
same form of Right, excepting for contractual restrictions on transferability,
to participants in the Employee Participation. Each Right will entitle the
holder to purchase one share of Common Stock upon the payment of the
Subscription Price. An aggregate of 6,548,664 Rights exercisable to purchase an
aggregate of 6,548,664 shares of Common Stock are being distributed in
connection with the Rights Offering and the Employee Participation. The Rights
will be evidenced by Subscription Certificates, which will be delivered by the
Subscription Agent and, in the case of the Rights Offering, will be
transferable, and, in the case of the Employee Participation, will not be
transferable. There can be no assurance that the Common Stock will trade at
prices above the Subscription Price. See "Risk Factors -- Market
Considerations."
 
     The issuance by the Company of shares of Common Stock pursuant to the Stock
Offering is not conditioned upon subscription for any minimum number of shares
of Common Stock by holders of the Rights. The completion of the Stock Offering
is conditioned, however, upon completion of the IP Stock Issuance, the Senior
Notes Offering, and the Acquisition. If the Acquisition Agreement is terminated
in accordance with its terms, the Subscription Agent will return all
subscription payments made, without interest.
 
     BEFORE EXERCISING OR SELLING ANY RIGHTS, POTENTIAL INVESTORS ARE URGED TO
READ CAREFULLY THE INFORMATION SET FORTH UNDER "RISK FACTORS."
 
     Each Right issued in the Stock Offering will entitle the holder thereof to
receive, upon payment of the Subscription Price, one share of Common Stock. To
exercise the Rights, holders must deliver payment of the Subscription Price in
funds that are immediately available on or prior to the Expiration Date and
fully comply with the instructions set forth below under the heading
"-- Exercise of Rights." Certificates representing shares of Common Stock
purchased pursuant to the exercise of the Rights will be delivered to
subscribers as soon as practicable after the Closing (expected to be two to
three weeks after the Expiration Date).
 
EXPIRATION DATE
 
     The Stock Offering and the Rights will expire on the Expiration Date
(            , 1998) at 5:00 p.m., New York City time, unless extended. The
Company may extend the Expiration Date, in its sole discretion, and will
announce any extensions thereof by not later than 9:00 a.m., New York City time,
on the business day following the previously scheduled Expiration Date. Any
extension of the Expiration Date will be for at least
 
                                       43
<PAGE>   46
 
three Nasdaq trading days. After the Expiration Date, unexercised Rights will be
null and void. The Company will not be obligated to honor any purported exercise
of Rights received by the Subscription Agent after the Expiration Date, or any
exercise for which immediately available funds are not on deposit with the
Subscription Agent on or prior to the Expiration Date, regardless of when
payment or the documents relating to such exercise were sent.
 
DETERMINATION OF SUBSCRIPTION PRICE
 
     The Subscription Price of $16.75 was determined in negotiations between the
Company and IP. The Company's objective in establishing the Subscription Price
was to approximate recent trading prices, raise the targeted proceeds, and
provide all of the Company's stockholders with a reasonable opportunity to make
an additional investment in the Company and thus limit to some extent dilution
of their ownership and voting percentage in the Company. In approving the
Subscription Price, the Board of Directors considered such factors as the
alternatives available to the Company for raising capital, the market price of
the Common Stock, pricing of similar transactions, the business prospects for
the Company, and the general condition of the securities markets. There can be
no assurance, however, that the market price of the Common Stock will not
decline prior to the Expiration Date or that, following the issuance of the
Rights and of the Common Stock upon exercise of Rights, a subscribing holder
will be able to sell the Rights or sell the Common Stock purchased in the Rights
Offering at a price equal to or greater than the Subscription Price.
 
EXERCISE OF RIGHTS
 
     Except for participants in the Employee Participation, Rights may be
exercised by delivery to the Subscription Agent, on or prior to the Expiration
Date, of the properly completed and duly executed Subscription Certificate
evidencing such Rights (together with any required signature guarantees),
accompanied by payment in full of the Subscription Price for each share of
Common Stock to be purchased. Persons exercising Rights may purchase any number
of shares of Common Stock, up to the maximum shown on the Subscription
Certificate. All payments must be made by (i) check or bank draft drawn upon a
U.S. bank or of any postal, telegraphic, or express money order payable to
"               , as Subscription Agent," or (ii) wire transfer of same-day
funds to the account maintained by the Subscription Agent for such purpose at
               , Account No.      , ABA No.      Attn:                [telephone
number]. Payment of the Subscription Price will be deemed to have been received
by the Subscription Agent only upon (a) clearance of any uncertified check, (b)
receipt by the Subscription Agent of any certified check or bank draft drawn
upon a U.S. bank or of any postal, telegraphic, or express money order, or (c)
receipt of good funds in the Subscription Agent's account designated above.
PLEASE NOTE THAT FUNDS PAID BY UNCERTIFIED PERSONAL CHECK MAY TAKE FIVE OR MORE
BUSINESS DAYS TO CLEAR. ACCORDINGLY, HOLDERS WHO WISH TO PAY THE SUBSCRIPTION
PRICE BY MEANS OF UNCERTIFIED PERSONAL CHECK ARE URGED TO MAKE PAYMENT
SUFFICIENTLY IN ADVANCE OF THE EXPIRATION DATE TO ENSURE THAT SUCH PAYMENT IS
RECEIVED AND CLEARED BY SUCH DATE, AND ARE URGED TO CONSIDER PAYMENT BY MEANS OF
CERTIFIED OR CASHIER'S CHECK, MONEY ORDER, OR WIRE TRANSFER OF SAME DAY FUNDS.
Subscription Certificates and payment of the Subscription Price should be
delivered to one of the following addresses:
 
By Mail:
 
By Hand:
 
By Overnight Delivery
 
By Facsimile (Foreign/APO/FPO use only):
 
Confirm facsimile by telephone only:
 
     A subscription will not be valid if the Subscription Certificate has not
been received on or before the Expiration Date.
 
                                       44
<PAGE>   47
 
     Unless a Subscription Certificate (i) provides that the shares of Common
Stock to be issued pursuant to the exercise of Rights represented thereby are to
be delivered to the record holder of such Rights or (ii) is submitted for the
account of an Eligible Institution (as defined below), signatures on such
Subscription Certificate must be guaranteed by an Eligible Institution subject
to the standards and procedures adopted by the Subscription Agent. An "Eligible
Institution" is an eligible guarantor institution (banks, stockbrokers, savings
and loan associations, and credit unions with membership in an approved
medallion signature guarantee program) as defined in the Commission's rules.
 
     A holder who holds shares of Common Stock or warrants for the account of
others, such as a broker, a trustee, or a depositary for securities, should
notify the respective beneficial owners of such shares as soon as possible to
ascertain such beneficial owners' intentions and to obtain instructions with
respect to the Rights beneficially owned by them. Beneficial owners of Common
Stock, warrants, or Rights held through a nominee should contact the nominee and
request the nominee to effect transactions in accordance with the beneficial
owner's instructions. If a beneficial owner wishes to obtain a separate
Subscription Certificate, he or she should contact the nominee as soon as
possible and request that a separate Subscription Certificate be issued in his
or her own name. A nominee may request that any Subscription Certificate held by
it be split into such smaller denominations as it wishes, provided that the
Subscription Certificate to be split is received by the Subscription Agent,
properly endorsed, no later than 11:00 a.m., New York City time, three Nasdaq
trading days prior to the Expiration Date.
 
     If either the number of Rights being exercised is not specified on a
Subscription Certificate, or the payment delivered is not sufficient to pay the
full Subscription Price for all Common Stock stated as being subscribed for, the
holder will be deemed to have exercised the maximum number of Rights that could
be exercised for the amount of the payment he or she delivered. If the payment
delivered exceeds the aggregate Subscription Price for the number of shares of
Common Stock subscribed for, as indicated on the Subscription Certificate(s),
any excess payment remaining after the number of shares so indicated have been
purchased will be refunded as soon as practicable by mail, without interest.
 
     The Instructions accompanying the Subscription Certificates should be read
carefully and followed in detail. PLEASE DO NOT SEND SUBSCRIPTION CERTIFICATES
TO THE COMPANY.
 
     THE METHOD OF DELIVERY OF SUBSCRIPTION CERTIFICATES AND PAYMENT OF THE
SUBSCRIPTION PRICE TO THE SUBSCRIPTION AGENT WILL BE AT THE ELECTION AND RISK OF
THE HOLDERS, BUT, IF SENT BY MAIL, IT IS RECOMMENDED THAT SUCH CERTIFICATES AND
PAYMENTS BE SENT BY REGISTERED MAIL, PROPERLY INSURED, WITH RETURN RECEIPT
REQUESTED, AND THAT A SUFFICIENT NUMBER OF DAYS BE ALLOWED TO ENSURE DELIVERY TO
THE SUBSCRIPTION AGENT AND CLEARANCE OF PAYMENT PRIOR TO THE EXPIRATION DATE.
BECAUSE UNCERTIFIED PERSONAL CHECKS MAY TAKE FIVE OR MORE BUSINESS DAYS TO
CLEAR, HOLDERS ARE STRONGLY URGED TO PAY, OR ARRANGE FOR PAYMENT, BY MEANS OF
CERTIFIED OR CASHIER'S CHECK, MONEY ORDER, OR WIRE TRANSFER OF SAME DAY FUNDS.
 
     IF THE SUBSCRIPTION PRICE HAS NOT BEEN RECEIVED IN IMMEDIATELY AVAILABLE
FUNDS ON OR PRIOR TO THE EXPIRATION DATE, THE SUBSCRIPTION WILL NOT BE VALID.
 
     All questions concerning the timeliness, validity, form, and eligibility of
any exercise of Rights will be determined by the Company, whose determinations
will be final and binding. The Company, in its sole discretion, may waive any
defect or irregularity, or permit a defect or irregularity to be corrected
within such time as it may determine, or reject the purported exercise of any
Right by reason of any defect or irregularity in such exercise. Subscriptions
will not be deemed to have been received or accepted until all irregularities
have been waived or cured within such time as the Company determines in its sole
discretion. Neither the Company nor the Subscription Agent will be under any
duty to give notification of any defect or irregularity in connection with the
submission of Subscription Certificates or incur any liability for failure to
give such notification.
 
                                       45
<PAGE>   48
 
     Any questions or requests for assistance concerning the method of
exercising Rights or requests for additional copies of this Prospectus should be
directed to the Information Agent whose address and telephone numbers are set
forth under "-- Information Agent."
 
NO REVOCATION
 
     ONCE A HOLDER HAS EXERCISED HIS OR HER RIGHTS, THAT EXERCISE MAY NOT BE
REVOKED.
 
METHOD OF TRANSFERRING RIGHTS
 
     Rights (other than those issued in connection with the Employee
Participation) may be purchased or sold through usual investment channels,
including banks and brokers. It is anticipated that the Rights will trade on
Nasdaq under the symbol "               ." Certain registered broker-dealers
have indicated that they intend to make a market in the Rights during the period
the Rights are outstanding. However, there can be no assurance that a trading
market for the Rights will develop or, if such a market develops, as to how long
it will continue.
 
     The Rights evidenced by a single Subscription Certificate may be
transferred in whole by endorsing the Subscription Certificate for transfer in
accordance with the instructions included thereon. A portion of the Rights
evidenced by a single Subscription Certificate (but not fractional Rights) may
be transferred by delivering to the Subscription Agent a Subscription
Certificate properly endorsed for transfer, with instructions to register that
portion of the Rights indicated thereon in the name of the transferee (and to
issue a new Subscription Certificate to the transferee evidencing such
transferred Rights). In such event, a new Subscription Certificate evidencing
the balance of the Rights will be issued to the holder or, if the holder so
instructs, to an additional transferee. A signature guarantee must be provided
by an Eligible Institution.
 
     Rights issued pursuant to the Employee Participation are not transferable.
 
     The Rights evidenced by a Subscription Certificate also may be sold, in
whole or in part, through the Subscription Agent by delivering to the
Subscription Agent such Subscription Certificate properly executed for sale by
the Subscription Agent. If only a portion of the Rights evidenced by a single
Subscription Certificate is to be sold by the Subscription Agent, such
Subscription Certificate must be accompanied by instructions setting forth the
action to be taken with respect to the Rights that are not to be sold. If the
Rights can be sold, sales of such Rights will be deemed to have been effected at
the weighted average price received by the Subscription Agent for all Rights
sold by it on the day such Rights are sold, less any applicable brokerage
commissions, taxes, and other direct expenses of sale. Promptly following the
settlement of any such sale, the Subscription Agent will send the holder a check
for the net proceeds (after deduction of any applicable brokerage commissions,
taxes, and other direct expenses of the sale) from the sale of any Rights sold.
The Company will pay the fees charged by the Subscription Agent for effecting
sales. Orders to sell Rights must be received by the Subscription Agent prior to
11:00 a.m., New York City time, on the third Nasdaq trading day preceding the
Expiration Date. If fewer than all sales orders received by the Subscription
Agent can be filled, sales proceeds will be prorated among the holders based
upon the number of Rights each holder has instructed the Subscription Agent to
sell during such period, irrespective of when during such period the
instructions are received by the Subscription Agent. The Subscription Agent's
obligation to execute orders for the sale of Rights is subject to its ability to
find buyers. There can be no assurance that the Subscription Agent will be able
to sell any Rights or as to the price the Subscription Agent will be able to
obtain if it is able to effect any such sale. Any Rights that cannot be sold by
the Subscription Agent by 5:00 p.m., New York City time, on the third Nasdaq
trading day preceding the Expiration Date will be returned promptly by mail to
the holder.
 
     Holders wishing to transfer all or a portion of their Rights (but not
fractional Rights) should allow a sufficient amount of time prior to the
Expiration Date for (i) the transfer instructions to be received and processed
by the Subscription Agent, (ii) a new Subscription Certificate to be issued and
transmitted to the transferee or transferees with respect to transferred Rights,
and to the transferor with respect to retained Rights, if any, and (iii) the
Rights evidenced by such new Subscription Certificates to be exercised or sold
by
                                       46
<PAGE>   49
 
the recipients thereof. Neither the Company nor the Subscription Agent shall
have any liability to a transferee or transferor of Rights if Subscription
Certificates are not received in time for exercise or sale prior to the
Expiration Date.
 
     Except for the engagement fee to be paid by the Company to the Subscription
Agent, all commissions, fees, and other expenses (including brokerage
commissions and transfer taxes) incurred in connection with the purchase, sale,
or exercise of Rights will be for the account of the transferor of the Rights,
and none of such commissions, fees, or expenses will be paid by the Company or
the Subscription Agent.
 
FOREIGN AND CERTAIN OTHER STOCKHOLDERS
 
     In the event Subscription Certificates cannot be mailed to persons whose
addresses are outside the United States or who have an APO or FPO address, those
Certificates will be held by the Subscription Agent for their account. To
exercise their Rights, these holders must notify the Subscription Agent of their
desire to exercise before 11:00 a.m., New York City time, on the third Nasdaq
trading day preceding the Expiration Date, and must establish to the
satisfaction of the Company that their exercise is permitted under applicable
law. If such a holder does not notify the Subscription Agent and provide
acceptable instructions to the Subscription Agent before that deadline, his or
her Rights will be sold, if feasible, and the net proceeds, if in excess of
$5.00 (after expenses of sale), will be remitted to such holder. Any net
proceeds not distributed will be retained by the Company for general corporate
purposes.
 
SUBSCRIPTION AGENT
 
     The Company has appointed                as Subscription Agent for the
Stock Offering. The Subscription Agent's address, which is the address to which
the Subscription Certificates and payment of the Subscription Price must be
delivered, is:
 
By Mail:
 
By Hand:
 
By Overnight Delivery:
 
By Facsimile (Foreign/APO/FPO/use only):
 
Confirm facsimile by telephone only:
 
     The Subscription Agent will be paid customary fees and reimbursements for
its expenses by the Company. The Company has also agreed to indemnify the
Subscription Agent against any liability that it may incur in connection with
the Stock Offering.
 
INFORMATION AGENT
 
     The Company has appointed                as Information Agent for the Stock
Offering. Any questions or requests for additional copies of this Prospectus may
be directed to the Information Agent at the following address and telephone
number:
 
     Banks and brokers can call collect: (   )    -     . All others can call
toll-free (800)               .
               ---------------

     The Information Agent will be paid customary fees and reimbursed for its
expenses by the Company. The Company has also agreed to indemnify the
Information Agent from certain liabilities that it may incur in connection with
the Stock Offering.
 
                                       47
<PAGE>   50
 
EMPLOYEE PARTICIPATION
 
     The Board of Directors has determined to grant to employees and consultants
of the Company eligibility to participate in the Stock Offering. The same form
of Right that is being issued in the Rights Offering will be issued to holders
of vested and unvested options, and Restricted Stock, granted by the Company,
all of which were issued under the Company's stock incentive plans, except that,
as discussed below, the Rights issued in the Employee Participation will be
contractually restricted from transfer. Under the Employee Participation, one
Right will be issued for each vested or unvested option, or share of Restricted
Stock, held, and each Right will be exercisable for one share of Common Stock
upon payment of the $16.75 Subscription Price.
 
     Issuance of the Rights
 
     In order to receive Rights under the Employee Participation, option holders
and holders of Restricted Stock are required to enter into an Employee
Participation Agreement with the Company. This agreement will contain
restrictions on transferability of the Rights to be issued. Employee
Participation Agreements will be distributed on or before the Record Date.
 
     Rights Non-Transferable; Shares Issued Upon Exercise Non-Transferable
 
     Pursuant to the terms of the Employee Participation Agreement, option
holders and holders of Restricted Stock will be unable to transfer the Rights
issued under the Employee Participation. To enforce the restriction, the Company
will issue a "stop transfer" order to the Subscription Agent for Subscription
Certificates issued in connection with the Employee Participation.
 
     Purchases and sales of publicly traded Rights (if such a market develops),
issued in the Rights Offering by employees and consultants are governed by the
Company's normal stock trading policies. Employees and consultants should obtain
a copy of these policies from the general counsel of the Company before engaging
in any transactions.
 
     Under the terms of the "Stock Subscription Agreement," (under which
purchases of Common Stock by participants in the Employee Participation will
take place), the shares of Common Stock purchased under the Employee
Participation by payment of the Subscription Price will be restricted from
transfer for a period of one year.
 
     Stock Purchase Program
 
     In order to encourage the employees and consultants of the Company who are
eligible to participate in the Employee Participation to exercise Rights and
make an investment in the Common Stock, each employee and consultant of the
Company who wishes to purchase shares of Common Stock in the Employee
Participation may, in lieu of delivering cash to pay the Subscription Price,
borrow funds from the Company and use the borrowed funds to pay all or a portion
of the Subscription Price. The maximum amount that may be borrowed is 66% of the
value of the collateral pledged by an individual, with value calculated as set
forth below. Employees or consultants may pledge as collateral for the loan (i)
shares of Common Stock purchased by the employee or consultant under the
Employee Participation, (ii) other shares of Common Stock owned by the employee
or consultant, (iii) vested options or warrants held by the employee or
consultant, and (iv) unvested options and Restricted Stock granted to the
employee or consultant.
 
     The "value" of a share of Common Stock (including shares of Restricted
Stock) pledged as collateral will be equal to the average closing price (last
trade) of a share of Common Stock for the first ten trading days after the
Rights Offering begins. The value of each option or warrant pledged as
collateral will be equal to the deemed value of the underlying share of Common
Stock, less the exercise price of such security.
 
     Each employee and consultant of the Company who elects to pay all or a
portion of the Subscription Price with loan proceeds shall deliver to the
Subscription Agent a promissory note in favor of the Company (a "Participation
Note") and enter into a pledge agreement with respect to shares, options, or
warrants pledged
 
                                       48
<PAGE>   51
 
as collateral (a "Securities Pledge Agreement"). "See "-- Promissory Note" and
"-- Securities Pledge Agreement."
 
     Exercise of the Employee Participation Right
 
     Participants may exercise their Rights in the Employee Participation by
delivery to the Subscription Agent, on or before the Expiration Date, of the
properly completed and duly executed Subscription Certificate evidencing such
Rights and a duly executed Stock Subscription Agreement, accompanied by payment
in full of the Subscription Price for each share of Common Stock being
purchased. All payments must be made by a combination of (i) delivery of a duly
executed Participation Note, together with a duly executed Securities Pledge
Agreement and the certificates evidencing the securities (other than the shares
being purchased) pledged as collateral under the Securities Pledge Agreement,
(ii) check or bank draft drawn upon a United States bank or postal, telegraphic
or express money order payable to "               , as Subscription Agent," or
(iii) wire transfer of same-day funds to the account maintained by the
Subscription Agent for such purpose at                , Account No.      , ABA
No.      , Attn:                [telephone number]. Payment of the Subscription
Price will be deemed to have been received by the Subscription Agent only upon
(i) acceptance of the Participation Note and the accompanying documents, (ii)
clearance of any uncertified check, (iii) receipt by the Subscription Agent of
any certified check or bank draft drawn upon a United States bank or of any
postal, telegraphic or express money order, or (iv) receipt of good funds by
wire in the Subscription Agent's account designated above. PLEASE NOTE THAT
FUNDS PAID BY UNCERTIFIED PERSONAL CHECK MAY TAKE FIVE OR MORE BUSINESS DAYS TO
CLEAR. ACCORDINGLY, HOLDERS WHO WISH TO PAY THE SUBSCRIPTION PRICE BY MEANS OF
UNCERTIFIED PERSONAL CHECK ARE URGED TO MAKE PAYMENT SUFFICIENTLY IN ADVANCE OF
THE EXPIRATION DATE TO ENSURE THAT SUCH PAYMENT IS RECEIVED AND CLEARED BY SUCH
DATE, AND ARE URGED TO CONSIDER PAYMENT BY MEANS OF CERTIFIED OR CASHIER'S
CHECK, MONEY ORDER, OR WIRE TRANSFER OF SAME DAY FUNDS. Subscription
Certificates, Stock Subscription Agreements, and payment of the Subscription
Price (which may include a Participation Note and Securities Pledge Agreement)
should be delivered to one of the following addresses:
 
By Mail:
 
By Hand:
 
By Overnight Delivery:
 
     A subscription will not be valid if the Subscription Certificate has not
been received on or before the Expiration Date.
 
     Stock Subscription Agreement
 
     The Stock Subscription Agreement will contain a provision that prohibits
the employee or consultant purchasing shares of Common Stock in the Employee
Participation from selling, transferring, or otherwise disposing of or
encumbering those shares for a period of one year, except in certain limited
circumstances. In the event of termination of the employment or consulting
relationship with the Company, the loan evidenced by the Participation Note, if
applicable, and accrued interest thereon, will be immediately due and payable.
 
     Participation Note
 
     Under the terms of the Participation Note, the employee or consultant will
promise to pay the Company the amount borrowed, plus any unpaid accrued interest
thereon. The Company's recourse in event of default on payment of principal or
interest will be to the collateral pledged as security for the Participation
Note. The interest rate will be determined by the Board on the Record Date. The
interest accrued on the Participation Note will be payable on each December 31.
Principal on the Participation Note will be due in a lump sum on earlier of the
tenth anniversary of the Closing, or termination of the employment or consulting
relationship
 
                                       49
<PAGE>   52
 
with the Company. Additionally, the Company may call principal for repayment at
any time the loan amount exceeds 100% of the value of the pledged collateral.
 
     Securities Pledge Agreement
 
     Under the terms of the Securities Pledge Agreement, the employee or
consultant will grant to the Company a security interest in all of the
collateral pledged in order to collateralize the loan amount. The pledge will
secure the payment of all of the obligations of such employee or consultant
under the Participation Note. In the event of default under the Stock
Subscription Agreement, the Participation Note, or the Securities Pledge
Agreement, the Company may seize the pledged collateral in order to satisfy any
outstanding obligations which the employee or consultant may have under such
agreements. There can be no assurance that the liquidation value of the
collateral will be sufficient to satisfy the amount due under the Participation
Note, particularly in light of the fact that the unvested securities will have
no value in liquidation.
 
     No Revocation
 
     ONCE A HOLDER HAS EXERCISED THE RIGHTS ISSUED UNDER THE EMPLOYEE
PARTICIPATION, THAT EXERCISE MAY NOT BE REVOKED.
 
PREEMPTIVE RIGHTS OF WARRANT HOLDERS
 
     The Company's outstanding warrants to purchase Common Stock grant
preemptive rights to the warrant holders. These rights are the basis for
including the warrant holders in the Rights Offering. The IP Stock Issuance,
however, is a separate transaction to which the preemptive rights also apply. In
order to meet its obligations under the preemptive rights, the Company has
offered warrant holders the opportunity to participate in the private issuance
of Common Stock occurring in the IP Stock Issuance. Their participation in the
IP Stock Issuance will be on the basis of one share per share of Common Stock
issuable upon the exercise of their Warrants. They may purchase shares at $16.75
per share (the same price being paid by IP) and the amount of their purchases
will be added to the $94.0 million of shares to be purchased by IP. Warrant
holders who satisfy their preemptive rights by this means will be excluded from
the Rights Offering.
 
     To the extent that a warrant holder does not agree to exercise his or her
preemptive rights by purchasing under the terms of the IP Stock Issuance, that
holder will be eligible to receive Rights in the Rights Offering on the basis of
one share per share of Common Stock issuable upon the exercise of the warrants
he or she holds.
 
     The advantage to the warrant holders of purchasing Common Stock under the
terms of the IP Stock Issuance rather than in the Rights Offering is that the
tax treatment of exercising a contractual right inherent in the warrant (by
purchasing under the terms of the IP Stock Issuance) is probably more favorable
than that of receiving a Right and exercising it. See "Certain Federal Income
Tax Considerations." A disadvantage is that the Common Stock purchased privately
under the terms of the IP Stock Issuance is non-transferable in the public
market other than by complying with Rule 144, while the shares purchased upon
exercise of the Rights will be issued in a registered transaction and will be
freely tradeable on Nasdaq. A further disadvantage is that the ability to
purchase under the terms of the IP Stock Issuance is not transferable. Once a
warrant holder has made the election to purchase in that transaction, he or she
will not be eligible to participate in the Rights Offering, even if he or she
subsequently decides not to exercise his or her purchase rights.
 
     From the Company's perspective, the total number of shares being made
available to the warrant holders is the same, regardless how they choose to
exercise their preemptive rights. To the extent that any warrant holder opts to
purchase Common Stock under the terms of the IP Stock Issuable and is thereby
excluded from the Rights Offering, the total number of Rights distributed will
be reduced by the number of Rights that would have been distributed to the
excluded warrant holders. The Standby Commitment will be based on the proceeds
of the Stock Offering plus the proceeds of purchases by warrant holders who
exercised their preemptive rights by purchasing privately under the terms of the
IP Stock Issuance. Thus, the means chosen by warrant holders to exercise their
preemptive rights is neutral in terms of use or effect of the Standby
                                       50
<PAGE>   53
 
Commitment. The presentation in this Prospectus assumes initially that all
warrant holders will participate in the Rights Offering. Prior to circulating
this Prospectus, the Company will amend the size of the Rights Offering and
amend its discussion of the IP Stock Issuance and of the Standby Commitment to
reflect the actual size of each of them, giving effect to the preemptive rights
decisions by the warrant holders.
 
STANDBY COMMITMENT
 
     To ensure that the Company will obtain a minimum of $200.0 million through
the Equity Financings, IP has agreed under the terms of the Stock Purchase
Agreement that, in addition to the $94.0 million IP Stock Issuance, and subject
to certain limited exceptions, it will purchase privately at the Subscription
Price that number of shares of Common Stock necessary to bring the total
proceeds of the Stock Offering, the exercise of warrant holder preemptive
rights, and the Standby Commitment to $106.0 million. IP Delaware and IP Bermuda
are not participating in the Stock Offering.
 
     The Standby Commitment is in addition to IP's agreement to purchase a
minimum of 5,611,940 shares of Common Stock at $16.75, or approximately $94.0
million in the aggregate. See "Acquisition of Business Insurance Group,
Inc. -- Equity Financings."
 
     In consideration of the Standby Commitment, the Company has agreed to issue
the Commitment Fee Warrants, exercisable to purchase an aggregate of 734,000
shares of Common Stock at an exercise price of $16.75 per share, payable at the
Closing. The Commitment Fee Warrants will be issued to IP and to an affiliate of
Zurich, which is receiving warrants in consideration of certain financing
commitments to IP II. The Company is obligated to issue the Commitment Fee
Warrants whether or not the Stock Offering is consummated. No Rights will be
issued in respect of the Commitment Fee Warrants.
 
     The rights and obligations of the Company and IP with respect to the
Standby Commitment are subject to certain limited conditions, including the
absence of any pending or threatened action, suit, or proceeding relating to the
Stock Offering or the Stock Purchase Agreement.
 
                                       51
<PAGE>   54
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
     The following selected consolidated financial data are qualified by
reference to, and should be read in conjunction with, the consolidated financial
statements and notes thereto included elsewhere in this document. The selected
consolidated financial data set forth below as of and for the years ended
December 31, 1997, 1996, and 1995 have been derived from the audited financial
statements of the Company included elsewhere in this document. The selected
consolidated financial data set forth below as of and for the years ended
December 31, 1994 and 1993 have been derived from audited financial statements
of the Company not included in this document. The selected consolidated
financial data as of and for the three months ended March 31, 1998 and 1997 have
been derived from unaudited consolidated financial statements of the Company,
but include all adjustments, including normally occurring accruals, that the
Company considers necessary for a fair presentation of the results of operations
for the periods presented. The results of operations for the three months ended
March 31, 1998 are not necessarily indicative of the results that may be
expected for the Company's fiscal year ending December 31, 1998.
 
<TABLE>
<CAPTION>
                                            THREE MONTHS
                                           ENDED MARCH 31,                          YEAR ENDED DECEMBER 31,
                                       -----------------------   --------------------------------------------------------------
                                          1998         1997       1997(1)        1996         1995         1994         1993
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
REVENUES:
  Gross premiums written.............  $   41,053   $   22,780   $  159,352   $   99,282   $   97,084   $  134,769   $  157,986
  Net premiums written...............      28,501       20,003      136,929       87,715       89,139      105,946      154,431
  Net premiums earned................      30,587       18,978      140,920       88,648       89,735      110,418      153,585
  Net investment income (excluding
    capital gains and losses)........       3,853        2,077       12,630        7,738       10,309        9,014        8,481
  Net capital gain (loss)............         400            9           44           31         (525)          35        1,069
  Other income (expense), net........        (179)        (181)        (817)         186         (536)        (340)        (743)
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
        Total revenues...............      34,661       20,883      152,777       96,603       98,983      119,127      162,392
EXPENSES:
  Claim and claim adjustment
    expenses, net of reinsurance.....      18,288       10,271       90,447       55,638       53,970       78,761      113,817
  Underwriting and general and
    administrative expenses..........       9,991        7,004       37,695       34,138       29,447       21,660       28,779
  Policyholder dividends.............          --           --           --       (5,927)      (5,742)       4,983       11,371
  Goodwill amortization..............         304           --        1,039           --           --           --           --
  Interest expense...................          --        1,727        6,335        7,527        9,619        8,726        6,221
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
        Total expenses...............      28,583       19,002      135,516       91,376       87,294      114,130      160,188
  Income from continuing operations
    before preferred securities and
    extraordinary items -- pre-tax...       6,078        1,881       17,261        5,227       11,689        4,997        2,204
  Income tax benefit (expense).......      (1,347)        (437)       1,788         (739)       5,849           (4)       2,304
  Accretion on preferred securities
    -- pre-tax.......................      (2,836)        (688)      (4,650)      (2,525)      (2,255)      (1,035)          --
  (Loss) from operations of
    discontinued P&C
    operations -- pre-tax(2).........          --           --           --           --      (14,912)          --       (4,532)
  Extraordinary (loss) -- pre-tax....          --           --      (19,540)          --           --       (3,064)        (686)
  Cumulative effect of change in
    accounting for income taxes......          --           --           --           --           --           --        2,297
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
        Net income (loss)............  $    1,895   $      756   $   (5,141)  $    1,963   $      371   $      894   $    1,587
                                       ==========   ==========   ==========   ==========   ==========   ==========   ==========
BASIC EPS:
Per common share:
  Income before items below -- after
    all taxes(3).....................  $     0.80   $     0.42   $     3.63   $     1.31   $     5.12   $     1.45   $     1.31
  Preferred securities -- pre-tax....       (0.48)       (0.20)  $    (0.89)       (0.74)       (0.66)       (0.30)          --
  Discontinued
    operations -- pre-tax............          --           --           --           --        (4.35)          --        (1.32)
  Extraordinary items -- pre-tax.....          --           --        (3.72)          --           --        (0.89)       (0.20)
  Cumulative effect of change in
    accounting -- pre-tax............          --           --           --           --           --           --         0.67
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
        Net income (loss)............  $     0.32   $     0.22   $    (0.98)  $     0.57   $     0.11   $     0.26   $     0.46
                                       ==========   ==========   ==========   ==========   ==========   ==========   ==========
</TABLE>
 
                                       52
<PAGE>   55
 
<TABLE>
<CAPTION>
                                            THREE MONTHS
                                           ENDED MARCH 31,                          YEAR ENDED DECEMBER 31,
                                       -----------------------   --------------------------------------------------------------
                                          1998         1997       1997(1)        1996         1995         1994         1993
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
DILUTED EPS:
Per common shares:
  Income before items below -- after
    all taxes(3).....................  $     0.61   $     0.27   $     2.71   $     0.93   $     4.44   $     0.97   $     0.94
  Preferred Securities -- pre-tax....       (0.37)       (0.13)       (0.66)       (0.52)       (0.57)       (0.20)          --
  Discontinued
    operations -- pre-tax............          --           --           --           --        (3.78)          --        (0.95)
  Extraordinary items -- pre-tax.....          --           --        (2.79)          --           --        (0.60)       (0.14)
  Cumulative effect of change in
    accounting -- pre-tax............          --           --           --           --           --           --         0.48
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
    Net income (loss)................  $     0.24   $     0.14   $    (0.74)  $     0.41   $     0.09   $     0.17   $     0.33
                                       ==========   ==========   ==========   ==========   ==========   ==========   ==========
OTHER DATA:
  EBITDA(4)..........................       6,601        2,947       24,749       14,727       22,652       15,276        9,300
GAAP RATIOS:(5)
  Claim and claim adjustment expense
    ratio............................        59.8%        54.1%        64.2%        62.8%        60.1%        71.3%        74.1%
  Expense ratio......................        32.7%        36.9%        26.7%        31.8%        26.4%        24.1%        26.1%
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Continuing operations combined
    ratios, net of reinsurance.......        92.5%        91.0%        90.9%        94.6%        86.5%        95.4%       100.2%
                                       ==========   ==========   ==========   ==========   ==========   ==========   ==========
  Ratio of earnings to combined fixed
    charges and accretion on
    preferred securities(6)..........        1.84x        1.45x        1.98x        1.27x        1.87x        1.36x        1.33x
FINANCIAL POSITION:
  Total cash and investment(7)
  Carrying value.....................  $  228,535   $  140,912   $  242,116   $  149,440   $  163,951   $  176,878   $  150,179
    Market value.....................     228,535      140,912      242,116      149,440      166,103      172,706      156,744
  Total assets.......................     401,508      297,984      416,569      306,569      240,781      286,776      264,098
  Long-term debt.....................          30       96,947           30       98,961        8,530        9,730        6,743
  Claim and claim adjustment expense
    liability........................     180,333      106,758      201,225      115,529      141,495      171,258      171,038
  Total liabilities..................     238,409      228,002      255,474      237,807      176,256      227,622      224,044
  1994 Preferred securities issued by
    affiliate........................          --       24,258           --       23,571       21,045       18,790           --
  Company-obligated trust preferred
    securities.......................     101,291           --      101,277           --           --           --           --
  Net stockholders' equity...........      61,808       45,724       59,818       45,191       43,480       40,364       40,055
  Book value per share...............  $    10.52   $    13.27   $    10.19   $    13.11   $    12.68   $    11.77   $    11.68
  Outstanding shares.................   5,874,379    3,446,492    5,871,279    3,446,492    3,430,373    3,429,873    3,429,873
</TABLE>
 
- ------------------------------
(1) The information for the year ended December 31, 1997 includes the financial
    data of SPCC for the period beginning April 1, 1997.
 
(2) The Company's losses from discontinued operations resulted principally from
    contractors' and developers' liability business underwritten from 1986 to
    1991.
 
(3) Since the Company's inception it has not declared or paid any dividends to
    its stockholders. "Income before items below -- after all taxes" has been
    calculated to include the tax benefits related to the items following.
 
(4) EBITDA consists of earnings before interest, taxes, minority interest,
    depreciation, and amortization. EBITDA is presented here not as a measure of
    operating results, but rather as a measure of the Company's cash flow and
    debt service ability, and should not be considered as an alternative to net
    earnings and cash flows determined in accordance with GAAP. Because the
    Company's ability to obtain dividends from its insurance subsidiaries may be
    subject to a range of restrictions, EBITDA is not necessarily indicative of
    the Company's ability to service its indebtedness.
 
(5) These ratios are for continuing operations. The claim and claim adjustment
    expense ratio is calculated by dividing the claim and claim adjustment
    expenses by net premiums earned. The expense ratio is calculated by dividing
    the sum of commissions (net of reinsurance ceding commissions), policyholder
                                       53
<PAGE>   56
 
    dividends, and general and administrative expenses by net premiums earned.
    The combined ratio is the sum of the claim and claim adjustment expense
    ratio and the expense ratio.
 
(6) For purposes of calculating the ratio of earnings to combined fixed charges
    and accretion on preferred securities, earnings represent income before the
    provision (benefit) for income taxes, plus fixed charges. Fixed charges
    consist of interest expense, amortization of financing costs, and the
    portion of rental expense on operating leases which the Company estimates to
    be representative of the interest factor attributable to the leases.
    Preferred stock dividends consist of dividends on preferred securities
    having an effective interest rate of 11.7% issued in June 1994 by an
    affiliate. An aggregate of $20.0 million in such securities were issued and
    $26.6 million in face value was repaid in December 1997. The payment was
    made out of the proceeds of the Trust Preferred Securities and thereafter
    accrual of preferred securities dividends reflects the Trust Preferred
    Securities.
 
(7) Investments as of December 31, 1997 and 1996 are reflected at market value.
    As of December 31, 1995 and 1994 a portion of the portfolio was classified
    as held to maturity and was therefore reflected at amortized cost and the
    remaining portfolio was shown at market value. Investments as of December
    31, 1993 are reflected at amortized cost. The changes in portfolio valuation
    reflect the adoption of Statement of Financial Accounting Standard No. 115,
    effective for fiscal years following December 15, 1993.
 
                                       54
<PAGE>   57
 
                               SUPERIOR NATIONAL
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion and analysis provides information that management
believes to be relevant for an understanding of the Company's consolidated
results of operations and financial condition. The discussion should be read in
conjunction with the consolidated financial statements and the notes thereto.
 
OVERVIEW
 
     The Company recorded an underwriting profit from continuing operations of
$2.3 million or $0.30 per share on a diluted basis in the three month period
ended March 31, 1998, versus an underwriting profit of $1.7 million or $0.32 per
share on a diluted basis in the corresponding period in the prior year. The
increase in underwriting profit from continuing operations was primarily the
result of an increase in premiums as a result of the April 11, 1997 acquisition
of SPCC. During the three months ended March 31, 1998, the Company realized net
income of $1.9 million or $0.24 per share on a diluted basis as compared to $0.8
million or $0.14 per share on a diluted basis for the three months ended March
31, 1997. In addition to improved underwriting profit, net income increased due
to a $2.2 million increase in investment income, which resulted from the
increase in invested assets. Invested assets increased due to the SPCC
acquisition and the net proceeds of the issuance of the Trust Preferred
Securities discussed below. The increase in underwriting profit and investment
income was offset in part by dividends and accretion on the Trust Preferred
Securities and amortization of goodwill.
 
     During 1997, the Company entered into three significant extraordinary
transactions: the acquisition of Pac Rim, the parent of SPCC, completed April
11, 1997; the prepayment of approximately $88.6 million of long-term debt,
completed June 30, 1997; and the issuance of $105.0 million in Trust Preferred
Securities completed December 3, 1997. The Company's income before preferred
securities' dividends and accretion, discontinued operations, and extraordinary
items was $10.8 million in 1997, as compared to $3.6 million in 1996. The
increase of $7.2 million in income before income taxes, preferred securities'
dividends and accretion, discontinued operations, and extraordinary items was
primarily the result of a $4.9 million increase in investment income. The
increase of $4.9 million in net investment income is primarily due to increases
of $92.7 million and $93.1 million in assets available for investment that
resulted, respectively, from the acquisition of SPCC and the November 1996
financing transaction with The Chase Manhattan Bank ("Chase"). See "-- Liquidity
and Capital Resources."
 
     For the year ended December 31, 1997, the Company recorded a net loss of
$5.1 million after preferred securities' dividends and accretion, discontinued
operations, and extraordinary items, as compared to net income of $2.0 million
for the year ended December 31, 1996. Net loss per share for the year ended
December 31, 1997 was $0.74 (diluted) versus net income per share of $0.41
(diluted) in 1996. During 1997, the Company recorded $12.9 million in
extraordinary losses, net of income tax benefits, as a result of the prepayment
of debt or the retirement of debt instruments, as compared to 1996, when no
extraordinary losses were recorded. Further, during 1997, the Company recorded
$3.0 million in dividend expense and accretion on preferred securities, as
compared to $1.7 million in 1996.
 
     For the year ended December 31, 1996, the Company's net income was $2.0
million, as compared to $0.4 million in 1995. Net income per share for the year
ended December 31, 1996 was $0.41 (diluted) versus $0.09 (diluted) for the year
ended December 31, 1995. Income before preferred securities' dividends and
accretion, discontinued operations, and extraordinary loss was $3.6 million for
the year ended December 31, 1996, versus $11.7 million in 1995. The decrease in
1996 was due principally to a $5.3 million fee for reinsurance, as well as an
increase of $1.7 million from 1995 claim and claim adjustment expense. Income
before preferred securities' dividends and accretion, discontinued operations,
and extraordinary loss, excluding the above discussed adjustments, was $10.6
million for the year ended December 31, 1996, as compared to $11.7 million for
the comparable period of 1995.
 
                                       55
<PAGE>   58
 
THREE MONTHS ENDED MARCH 31, 1998 AS COMPARED TO THREE MONTHS ENDED MARCH 31,
1997
 
     Gross written premium increased $18.3 million or 80.2% to $41.1 million in
the first quarter of 1998 as compared to the same period in 1997. Substantially
all of this increase can be attributed to the addition of business written by
SPCC. Net written premium increased $8.5 million or 42.5% to $28.5 million in
the first quarter of 1998 as compared to the same period in 1997, reflecting the
increase in gross written premium. Net premiums earned increased $11.6 million
or 61.2% to $30.6 million in the first quarter of 1998 as compared to the same
period in 1997, reflecting the increase in net written premium.
 
     Net claim and claim adjustment expenses increased $8.0 million or 78.1% to
$18.3 million in the first quarter of 1998 as compared to the same period in
1997. This increase is attributable to the addition of premiums renewed by SNIC
for policies expiring from SPCC. The net claim and claim adjustment expense
ratio increased to 59.8% in the first quarter of 1998 from 54.1% in the same
period of 1997. Although the Company has been experiencing a reduction in the
frequency of claims, at the same time there has been an increase in claim
severity for injuries sustained in 1995 and thereafter. To address the
increasing severity trend, management has put into place a Claim Severity
Management Program that is intended to reduce the Company's average ultimate per
claim and claim adjustment expense for 1995 and subsequent dates of injury. See
"Superior National -- Business -- Claim Severity Management Program."
 
     Underwriting and general and administrative expenses increased $3.0 million
or 42.6% to $10.0 million in the first quarter of 1998, as compared to the same
period in 1997. This increase was due primarily to the acquisition of SPCC. Net
commission expense increased $0.8 million or 34.6% to $3.0 million in the first
quarter of 1998, as compared to the same period in 1997. The increase in net
commission expense is due to an increase in premiums. Net underwriting and
general and administrative expenses increased 45.7% to $10.5 million in the
first quarter of 1998 from $7.2 million in the same period of 1997. The
Company's underwriting expense ratio decreased 4.2 percentage points to 32.7%
for the first quarter of 1998 from 36.9% for the same period in 1997, due
primarily to a reduction in net commission expense relative to the related net
premium level. This reduction in net commission expense relative to the related
net premium level is due to an increase in reinsurance ceding commissions
received. The direct commission expense relative to the related direct written
premium level remained unchanged from the prior year.
 
     The Company recorded an underwriting profit from continuing operations of
$2.3 million in the first quarter of 1998, versus $1.7 million for the same
period in 1997. The increase in underwriting profit from continuing operations
was primarily the result of the increase in premiums discussed above, coupled
with a decrease in underwriting and general and administrative expenses relative
to the premium level.
 
     Net investment income, excluding realized investment gains/losses,
increased $1.8 million or 85.5% to $3.9 million in the first quarter of 1998
compared to the same period in 1997. The improvement was due to the increase in
assets available for investment resulting from the SPCC acquisition and the
availability of $30.0 million in invested assets as a result of the issuance of
the Trust Preferred Securities. Excluding SPCC and the increase in invested
assets due to the issuance of the Trust Preferred Securities, net investment
income decreased $0.3 million or 18.4% to $1.8 million in the first quarter of
1998 as compared to the same period in 1997. This 18.4% decrease was due to a
change in portfolio mix as compared to the same period in 1997.
 
     No interest expense was incurred in the first quarter of 1998 as compared
to $1.7 million for the same period in 1997, due to the repayment of all
long-term debt with funds obtained through the sale of the Trust Preferred
Securities.
 
     Distributions and accretion on preferred securities increased by $2.1
million as compared to $0.7 million in the first quarter of 1998, as a result of
the issuance of the Trust Preferred Securities and the redemption of preferred
securities issued by an affiliate in December 1997.
 
                                       56
<PAGE>   59
 
     A summary of net investment income, excluding capital gains and losses, for
the three months ended March 31, 1998 and 1997 is as follows:
 
<TABLE>
<CAPTION>
                                                               THREE MONTHS
                                                             ENDED MARCH 31,
                                                             ----------------
                                                              1998      1997
                                                             ------    ------
                                                              (IN THOUSANDS)
<S>                                                          <C>       <C>
Interest on bonds and notes................................  $3,643    $  858
Interest on invested cash..................................     318     1,346
Other......................................................      76        --
                                                             ------    ------
Total investment income....................................   4,037     2,204
Capital gains..............................................     400         9
Investment expense.........................................     184       127
                                                             ------    ------
Net investment income......................................  $4,253    $2,086
                                                             ======    ======
</TABLE>
 
     The distribution of the Company's consolidated investment portfolio is as
follows:
 
<TABLE>
<CAPTION>
                                             MARCH 31, 1998
                                              (UNAUDITED)          DECEMBER 31, 1997
                                          --------------------    --------------------
                                          CARRYING     MARKET     CARRYING     MARKET
                                           VALUE       VALUE       VALUE       VALUE
AVAILABLE FOR SALE:                       --------    --------    --------    --------
                                                         (IN THOUSANDS)
<S>                                       <C>         <C>         <C>         <C>
U.S. Government Agencies and
  Authorities...........................  $ 77,836    $ 77,836    $ 90,097    $ 90,097
Collateralized Mortgage Obligations.....    36,721      36,721      73,481      73,481
Corporate Instruments...................    45,101      45,101      41,636      41,636
Special Revenue and Special
  Assessment............................    50,407      50,407          --          --
State and Political Subdivisions........        --          --          --          --
                                          --------    --------    --------    --------
Total Available for Sale................  $210,065    $210,065    $205,214    $205,214
                                          ========    ========    ========    ========
</TABLE>
 
<TABLE>
<CAPTION>
                                                   MARCH 31, 1998
                                                    (UNAUDITED)       DECEMBER 31, 1997
                                                  ----------------    ------------------
                                                            MARKET               MARKET
                                                   COST     VALUE      COST       VALUE
EQUITY SECURITIES                                 ------    ------    -------    -------
                                                              (IN THOUSANDS)
<S>                                               <C>       <C>       <C>        <C>
Corporate.......................................  $1,837    $1,980    $1,356     $1,526
                                                  ------    ------    ------     ------
Total...........................................  $1,837    $1,980    $1,356     $1,526
                                                  ======    ======    ======     ======
</TABLE>
 
     The Company's management monitors the matching of assets and liabilities
and attempts to maintain the Company's portfolio's investment duration at the
mid-point of the length of its net claim and claim adjustment expense payout
pattern. Investment duration is the weighted average measurement of the current
maturity of a fixed income security, in terms of time, of the present value of
the future payments to be received from that security. However, in selecting
assets to purchase for its investment portfolio, the Company considers each
security's modified duration and the effect of that security's modified duration
on the portfolio's overall modified duration. Modified duration is a measurement
that estimates the percentage change in market value of an investment for a
small change in interest rates. The modified duration of fixed maturities at
March 31, 1998 was 3.05 years compared to 2.90 years at December 31, 1997. At
March 31, 1998, 97.1% of the carrying values of investments in the fixed
maturities portfolio were rated as investment grade by the Securities Valuation
Office of NAIC.
 
     Discontinued operations had claim and claim adjustment expense reserves of
$12.1 million as of March 31, 1998, which was consistent with management's
expectations. The Company has significant exposure to construction defect
liabilities on P&C insurance policies underwritten from 1986 to 1993. Management
continues to closely monitor the Company's potential exposure to construction
defect claims and has not changed its estimates of ultimate claim and claim
adjustment expenses on discontinued operations since 1995. Management believes
its current reserves are adequate to cover the Company's claims activity. There
can be no assurance, however, that further upward development of ultimate loss
costs associated with
 
                                       57
<PAGE>   60
 
construction defect claims will not occur. The Company will continue to closely
monitor the adequacy of its loss reserves in the discontinued operations.
Offsetting these liabilities are $11.4 million of deferred tax assets and $0.7
million in reinsurance recoverable on paid claim and claim adjustment expenses.
 
YEAR ENDED DECEMBER 31, 1997 AS COMPARED TO YEAR ENDED DECEMBER 31, 1996
 
     Gross written premium for the years ended December 31, 1997 and 1996 were
$159.4 million and $99.3 million, respectively. This increase in gross written
premium represents an increase of $60.1 million or 60.5% for the 1997 policy
year as compared to the 1996 policy year. Substantially all of this increase can
be attributed to business written related to SPCC. Net written premium increased
$49.2 million or 56.1% to $136.9 million for the year ended December 31, 1997,
as compared to the year ended December 31, 1996. This increase reflects the
increase in gross written premium. Net premium earned increased $52.3 million or
59.0% to $140.9 million for the year ended December 31, 1997, as compared to the
year ended December 31, 1996.
 
     For the year ended December 31, 1997, net claim and claim adjustment
expenses increased $34.8 million or 62.6% to $90.4 million as compared to $55.6
million for the year ended December 31, 1996. The entire increase of claim and
claim adjustment expense relates to the acquisition of SPCC. The net claim and
claim adjustment expense ratio increased to 64.2% for the year ended December
31, 1997, as compared to 62.8% for the year ended December 31, 1996. The
increase in the claim and claim adjustment expense ratio is due primarily to the
1997 accident year. Although the Company has continued to experience a reduction
in the frequency of claims, at the same time there has been an increase in claim
severity for injuries sustained in 1995 and thereafter. To address the
increasing severity trend, management has put into place the Claim Severity
Management Program that is intended to reduce the Company's average ultimate
loss cost per claim and claim adjustment expense for 1995 and subsequent dates
of injury. See "Superior National -- Business -- Claim Severity Management
Program."
 
     Underwriting and general and administrative expenses, excluding
policyholder dividends, increased $3.6 million or 10.4% to $37.7 million for the
year ended December 31, 1997, as compared to the same period in 1996. This
increase primarily resulted from the SPCC acquisition. Excluding the one-time
expense of $5.3 million for the cancellation in 1996 of a reinsurance contract,
underwriting expenses for 1997 increased $8.9 million or 30.9%. The Company's
expense ratio decreased to 26.7% from 38.5% for the year ended December 31,
1997, as compared to 1996. The decrease in the expense ratio from 1997 to 1996
is due to the 1996 one-time charge of $5.3 million, previously mentioned, and an
increase in premium without a corresponding increase in expense resulting from
the SPCC acquisition.
 
     No policyholder dividends were paid during the year ended December 31,
1997, as compared to $1.3 million of such dividends during fiscal 1996. Prior to
open rating, policyholder dividends served both as an economic incentive to
employers for safe operations and as a means of price differentiation. As a
result of consumers' preference for the lowest price at a policy's inception
under open rating, dividends are currently no longer a significant factor in the
marketing of workers' compensation insurance in California. In 1995, as a result
of the diminishing value of policyholder dividends as a marketing tool, the
Company's management declared a moratorium in the payment of policyholder
dividends for California policies. In December 1996, the Company discontinued
dividend payments. Estimated amounts to be returned to policyholders were
accrued when the related premium was earned by the Company. Dividends were paid
to the extent that a surplus was accumulated from the premium paid on the
specific workers' compensation policy.
 
     Net investment income increased $4.9 million or 63.1% to $12.7 million for
the year ended December 31, 1997, as compared to 1996. The increase in
investment income is due to a $92.7 million increase in assets available for
investment that resulted from the acquisition of SPCC.
 
     Interest expense decreased 15.8% to $6.3 million for the year ended
December 31, 1997, as compared to 1996. The decline in interest expense is due
primarily to the elimination of the funds withheld balance.
 
     Discontinued operations claim counts and losses as of December 31, 1997
were 215 and $13.5 million, respectively. These amounts and estimates are
consistent with management's expectations. The Company has
 
                                       58
<PAGE>   61
 
significant exposure to construction defect liabilities on P&C insurance
policies underwritten from 1986 to 1993. Management continues to monitor closely
its potential exposure to construction defect claims and has not changed its
estimates of ultimate claim and claim adjustment expense on discontinued
operations since 1995. Management believes its current reserves are adequate to
cover its claim liabilities. There can be no assurance, however, that further
upward development of ultimate loss costs associated with construction defect
claims will not occur. See "Superior National -- Business -- Discontinued
Operations."
 
YEAR ENDED DECEMBER 31, 1996 AS COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
     Gross written premium increased $2.2 million or 2.3% to $99.3 million in
1996 from 1995. The increase in gross written premium in 1996 was due primarily
to the Company's continued strategy of underwriting smaller risks where the
competition has been less fierce, as compared to larger policies. Net written
premium decreased $1.4 million or 1.6% to $87.7 million reflecting an increased
amount of premiums ceded to reinsurers. Net premiums earned decreased $1.1
million or 1.2% to $88.6 million in 1996 from 1995, reflecting, in part, an
increase in ceded premiums.
 
     Claim and claim adjustment expenses increased $1.7 million or 3.1% to $55.6
million in 1996 from 1995, due principally to adverse development in claim and
claim adjustment expense reserves related to the 1995 accident year. The claim
and claim adjustment expense ratio as a percentage of net earned premium
increased slightly to 62.8% in 1996 from 60.1% in the 1995 accident year.
 
     Underwriting and general and administrative expenses, excluding
policyholder dividends, increased $4.7 million or 16% to $34.1 million in 1996
from 1995. The increase in underwriting and general and administrative expenses,
excluding policyholder dividends, was due primarily to a $5.3 million adjustment
recorded in the second quarter of 1996 for accrued costs related to the
cancellation of a reinsurance contract. Underwriting and general and
administrative expenses for 1996, excluding the $5.3 million in accrued costs,
were $28.8 million as compared to $29.4 million in 1995. The Company's expense
ratio, excluding the $5.3 million in accrued costs and policyholder dividends,
was 32.5% for 1996, which is comparable to 32.8% in 1995.
 
     Policyholder dividend expenses for 1996 were comparable to 1995,
constituting a decrease in underwriting expense of $5.9 million in 1996 as
compared to $5.7 million in 1995.
 
     Underwriting profit from continuing operations decreased $7.3 million or
60% to $4.8 million in 1996 from 1995, principally due to a $4.7 million
increase in underwriting expense. The increase in underwriting and general and
administrative expenses was due primarily to the cost of canceling the
reinsurance contract discussed above, and $2.0 million in claim and claim
adjustment expense due as a result of adverse development on reserves related to
prior accident years.
 
     Net investment income decreased $2.0 million or 20% to $7.8 million in 1996
as compared to 1995. The decline in investment income was due to a decrease in
the average investable assets of $11.3 million and a decline in the average
portfolio investment yield as a result of generally lower market interest rates
in 1996 as compared to 1995. While a financing transaction involving Chase and
Centre Reinsurance Limited, an affiliate of Zurich ("Centre Re"), entered into
in November 1996 substantially increased the size of the investment portfolio on
which the Company retained investment income, it occurred too late in 1996 to
have a material effect on 1996 net investment income results. See "-- Liquidity
and Capital Resources."
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Liquidity is a measure of an entity's ability to secure sufficient cash to
meet its contractual obligations and operating needs. The Company's cash inflows
are generated from cash collected for policies sold, investment income on the
existing portfolio, and sales and maturities of investments. The Company's cash
outflows consist primarily of payments for policyholders' claims, operating
expenses, and debt service. For their insurance operations, the Company's
subsidiaries must have available sufficient cash and liquid assets to meet their
obligations to policyholders and claimants in accordance with contractual
obligations in addition to meeting their ordinary operating costs. Absent
adverse material changes in the workers' compensation
 
                                       59
<PAGE>   62
 
insurance market, management believes that the Company's present cash resources
are sufficient to meet the needs of the Company for the foreseeable future.
 
     During the first three months of 1998, the Company used $20.6 million of
cash in its operations versus $8.0 million during the same period in 1997. The
$12.6 million increase in cash used in operations during the first three months
of 1998 is primarily due to the addition of SPCC operations beginning April 1,
1997. The Company's continued negative cash flow is the result of the Company's
historical in force premium bases being significantly higher than its current
level and higher than expected payments of claim and claim adjustment expenses
in the 1995 and 1996 accident years. The Company anticipates it will continue to
experience negative cash flow from operations until the claims related to the
historically higher premium base have been paid out. In addition, the reduction
in net written premium arising out of the Quota-Share Arrangement for large
accounts will increase negative cash flow substantially. Although the Company
has implemented its Claim Severity Management Program to control cash outflows
related to the 1995 and 1996 accident years at acceptable levels, there can be
no assurance that it will be successful. In any event, the Company believes that
it has adequate short-term investments and readily marketable investment-grade
securities to cover both claim payments and expenses. As of March 31, 1998, the
Company had total cash, cash equivalents and investments of $228.5 million and
had 99.1% of its investment portfolio invested in cash, cash equivalents, and
fixed maturities. In addition, 92.0% of the Company's fixed-income portfolio had
ratings of "AA" or equivalent or better and 98.1% had ratings of "BBB" or
equivalent or better.
 
     During the year ended December 31, 1997, the Company used $52.4 million of
cash in its operations versus $14.9 million in the year ended December 31, 1996.
The Company's continued negative cash flow is the result of the Company's
premium in force being significantly higher historically versus its current
level. The $37.5 million increase in cash used in operations during the year
ended December 31, 1997 is primarily due to the addition of the SPCC operations.
The Company believes that it has adequate short-term investments and readily
marketable investment-grade securities to cover both claim payments and
expenses. At December 31, 1997, the Company had total cash, cash equivalents,
and investments of $242.1 million and had 99.4% of its investment portfolio
invested in cash, cash equivalents, and fixed maturities. In addition, 90.8% of
the Company's fixed-income portfolio had ratings of "AA" or equivalent or better
and 98.0% had ratings of "BBB" or equivalent or better.
 
     The Company generated $77.3 million from financing activities during the
year ended December 31, 1997, as compared to $90.5 million in 1996. The 1996
financing activities consisted primarily of the transaction with Chase discussed
below. During 1997, net proceeds from the Company's financing activities were
used to fund the acquisition of SPCC, to repay outstanding bank debt, to redeem
outstanding preferred stock issued by an affiliate, and to refinance existing
debt. The Company generated the necessary cash to acquire SPCC from the proceeds
of a $44.0 million term loan and the sale of approximately $18.0 million in
Common Stock. Of the approximately $62.0 million raised in those financing
transactions, approximately $42.0 million was used to fund the acquisition of
SPCC, approximately $6.6 million was used to repay an existing bank loan, $10.0
million was contributed as capital to SPCC, and the remaining funds were used
for general corporate purposes, including the payment of related transaction
costs.
 
     On December 3, 1997, the Trust issued its Trust Preferred Securities,
having an aggregate liquidation amount of $105.0 million, in a private
placement, and also issued to the Company, for an aggregate consideration of
approximately $3.25 million, all of the Trust's common securities. The proceeds
from the sale of these securities were used by Trust to purchase the Senior
Subordinated Notes. On January 16, 1998, the Company and the Trust completed the
registration with the SEC of an exchange offer for the outstanding Trust
Preferred Securities, Senior Subordinated Notes, and related Company guarantee,
pursuant to which substantially all of these securities were exchanged for
substantially similar securities. The Company used the proceeds it received from
the issuance of the Senior Subordinated Notes to repay the $40.3 million
outstanding balance on the term loan used to acquire SPCC, to redeem
approximately $27.7 million in preferred stock issued by a Company affiliate to
Centre Reinsurance (Bermuda) Ltd., to pay approximately $4.0 million in related
transaction costs, and for general corporate purposes, including a $15.0 million
contribution to the surplus of SNIC.
 
                                       60
<PAGE>   63
 
     Distributions on the Trust Preferred Securities (and interest on the
related Senior Subordinated Notes) are payable semi-annually, in arrears, on
June 1 and December 1 of each year, and commenced June 1, 1998. Subject to
certain conditions set forth in the Indenture pursuant to which the Senior
Subordinated Notes were issued (the "Subordinated Notes Indenture"), on or after
December 1, 2005, the Company has the right to redeem the Senior Subordinated
Notes, in whole or in part at any time, at call prices ranging from 105.375% at
December 1, 2005 to 101.792% at December 1, 2007, and 100% thereafter. The
proceeds from any redemption will be immediately applied by the Trust to redeem
Trust Preferred Securities and the Trust's common securities at such redemption
prices. In addition, the Company has the right, at any time, subject to certain
conditions, to defer payments of interest on the Senior Subordinated Notes for
Extension Periods (as defined in the Subordinated Notes Indenture), each not
exceeding 10 consecutive semi-annual periods, provided that no Extension Period
may extend beyond the maturity date of the Senior Subordinated Notes. As a
consequence of any such extension by the Company of the interest payment period,
distributions on the Trust Preferred Securities would be deferred (though such
distributions would continue to accrue interest at a rate of 10.75% per annum
compounded semi-annually). 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 certain requirements.
 
     In addition, during 1997 the Company repaid approximately $0.6 million of
an existing bank loan and at the time due $3.7 million of the principal of the
term loan used to acquire SPCC.
 
     In November 1996, the Company entered into a financing transaction
involving Centre Re and Chase pursuant to which Chase extended a $93.1 million
term loan, net of transaction costs. The Company used the proceeds from the
transaction to purchase from SNIC reinsurance receivables due from Centre Re. On
June 30, 1997, the Company and Chase reached an agreement under which the
Company agreed to transfer these reinsurance receivables to Chase in exchange
for the cancellation of the Company's debt to Chase. As a result of these
actions, the Company's investable assets increased $93.1 million. The additional
investments contributed to the increase in investment income in 1997.
 
     The Company has a reverse purchase facility with a national securities
brokerage firm that allows it to engage in up to $20.0 million in reverse
purchase transactions secured by either U.S. Treasury instruments, U.S. Agency
debt, or corporate debt. This arrangement provides the Company with additional
short-term liquidity. Reverse purchase transactions may be rolled from one
period to the next, at which time the transaction is repriced. This type of
financing allows the Company a great deal of flexibility to manage short-term
investments, avoiding unnecessary realization of losses to satisfy short-term
cash needs. Further, this method of financing is less expensive than bank debt.
As of March 31, 1998, the Company had no obligation outstanding under this
facility.
 
     The Company, as a holding company, depends on dividends and intercompany
tax allocation payments from its operating subsidiaries for its net cash flow
requirements, which consist primarily of periodic payments on its outstanding
debt obligations. Absent other sources of cash flow, the Company cannot expend
funds materially in excess of the amount of dividends or tax allocation payments
that could be paid to it by SNIC and SPCC. Further, insurance companies are
subject to restrictions affecting the amount of shareholder dividends and
advances that may be paid within any year without the prior approval of the DOI.
The California Insurance Code provides that amounts may be paid as dividends on
an annual noncumulative basis (generally up to the greater of (i) net income for
the preceding year and (ii) 10% of statutory surplus as regards policyholders as
of the preceding December 31) without prior notice to, or approval by, the DOI.
Dividends may only be paid out of "earned surplus" as defined in the California
Insurance Code. No dividends were paid by SPCC or SNIC during 1997; however,
SNIC paid $2.9 million to the Company for its current income taxes. No dividends
were paid in the three months ended March 31, 1998. Insurance holding company
regulations, in ordinary circumstances, place a two-year moratorium on payments
of dividends by a subsidiary that has undergone a change of control. The Company
has requested of the DOI, and expects to receive, a waiver from the moratorium
in connection with the Acquisition. If dividends are available for payment as
expected, the Company believes it will have adequate cash to service its debt.
 
                                       61
<PAGE>   64
 
     The Company is party to several leases principally associated with the
Company's home and branch office space, as well as its fixed assets. These
leases contain provisions for scheduled lease charges and escalations in base
rent over the lease term. The Company's minimum lease commitment with respect to
these leases in 1998 is approximately $7.0 million. These leases expire from
2000 to 2003.
 
     With the exception of the approximately $285.0 million necessary to
complete the Acquisition of BIG, together with fees and costs related thereto,
the Company does not foresee any material expenditures during the next twelve
months other than those arising in the ordinary course of business.
 
     The effect of inflation on the revenues and net income of the Company
during the years ended December 31, 1997, 1996, and 1995 was not significant.
 
TAXES
 
     As of March 31, 1998, the Company had available $126.4 million in NOLs to
offset taxable income recognized by the Company in periods after March 31, 1998.
For federal income tax purposes, these NOLs will expire in material amounts
beginning in the year 2006. Any 5% shift in the current ownership of the Company
may result in a "change of ownership" under Section 382 of the Code, and limit
and defer the Company's ability to utilize NOLs. In an effort to protect these
NOLs, the Company's charter documents prohibit 5% owners of Common Stock
(including holders of options and warrants) from acquiring additional stock and
prohibit any additional person or entity from becoming a 5% holder of Common
Stock. The prohibition against changes in ownership by the 5% holders of Common
Stock expires in April 2000. The Company believes that it is very likely that
the Equity Financings will result in a "change of ownership", but has concluded
that the cost of the limitation of use of the NOLS in relation to the benefits
derived from the Acquisition is acceptable. The Company is seeking stockholder
approval of a proposal to eliminate the charter provisions at the Company's 1998
Annual Stockholders' Meeting. See "Risk Factors -- Limitation of Use of Net
Operating Loss Carryforwards."
 
PRIMARY DIFFERENCES BETWEEN GAAP AND SAP
 
     The financial statements contained herein have been prepared in conformity
with GAAP, as opposed to SAP prescribed or permitted for insurance companies by
regulatory authorities. SAP differs from GAAP principally in the following
respects: (a) premium income is taken into operations over the periods covered
by the policies, whereas the related acquisition and commission costs are
expensed when incurred; (b) deferred income taxes are not recognized under SAP;
(c) certain assets such as agent's balances over ninety days due and prepaid
expenses are nonadmitted assets for statutory reporting purposes; (d)
policyholder dividends are accrued when declared; (e) the cash flow statement is
not consistent with classifications and the presentation under GAAP; (f) bonds
are recorded at amortized cost, regardless of trading activities; (g) loss and
loss adjustment expense reserves and unearned premium reserves are stated net of
reinsurance; and (h) minimum statutory reserves for losses in excess of the
Company's estimates are required.
 
     The NAIC, recently approved the codification of SAP with an effective date
of January 1, 2001. Included in the codification is a change in the definition
of prescribed versus permitted policies that insurance companies use to prepare
their statutory financial statements. The Company has not yet determined the
impact of the adoption of the codification project.
 
YEAR 2000 STRATEGY
 
     A significant percentage of the software that runs most of the computers in
the United States and the rest of the world relies on two-digit date codes to
perform computations and decision making functions. Commencing January 1, 2000,
these computer programs may fail from an inability to interpret date codes
properly, misinterpreting "00" as the year 1900 rather than 2000. The Company is
in the process of identifying all necessary software changes to ensure that it
does not experience any loss of critical business functionality due to the Year
2000 issue. The Company has appointed an internal Year 2000 project manager and
adopted a three phase approach of assessment, correction, and testing. The scope
of the project includes all internal software, hardware, and operating systems,
and assessment of risk to the business from producers, vendors, and other
partners in Year 2000 issues. The Company believes that this formal assessment
of risk (including the prioritization of business risk), correction (including
conversions to new software), and testing of necessary changes will minimize the
business risk of Year 2000 from internal systems. The Company plans to
                                       62
<PAGE>   65
 
complete its Year 2000 conversion not later than December 31, 1998. Although the
Company has not completed its Year 2000 project, the Company does not believe
the Year 2000 issue will cause any system problems that could have a material
adverse effect on its operations. The Company does not expect the cost
associated with its Year 2000 project to be material.
 
SUPPLEMENTARY DATA
 
     Summarized quarterly financial data for 1998 (unaudited), 1997, and 1996 is
as follows:
 
<TABLE>
<CAPTION>
                                                                  THREE MONTHS ENDED
                                                    ----------------------------------------------
                                                    MARCH 31,    JUNE 30,    SEPT. 30,    DEC. 31,
                                                    ---------    --------    ---------    --------
                                                       (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                                 <C>          <C>         <C>          <C>
1998
Earned premiums...................................   $30,587     $     --     $    --     $    --
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items...........................................   $ 6,078     $     --     $    --     $    --
Net income........................................   $ 1,895     $     --     $    --     $    --
Basic earnings per share..........................   $  0.32     $     --     $    --     $    --
Diluted earnings per share........................   $  0.24     $     --     $    --     $    --
1997
Earned premiums...................................   $18,978     $ 45,410     $34,760     $41,772
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items...........................................   $ 1,881     $    382     $ 5,460     $ 9,538
Net income (loss).................................   $   756     $(10,530)    $ 2,132     $ 2,501
Basic earnings per share..........................   $  0.22     $  (1.80)    $  0.36     $  0.42
Diluted earnings per share........................   $  0.14     $  (1.39)    $  0.28     $  0.32
1996
Earned premiums...................................   $18,897     $ 24,136     $23,007     $22,608
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items...........................................   $ 1,656     $  1,406     $ 1,440     $   725
Net income........................................   $   678     $    526     $   712     $    47
Basic earnings per share..........................   $  0.20     $   0.15     $  0.21     $  0.02
Diluted earnings per share........................   $  0.17     $   0.12     $  0.15     $  0.01
</TABLE>
 
NEW ACCOUNTING STANDARDS
 
     In February 1997, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standard No. 128, "Earnings per Share" ("SFAS
128"), which was adopted for the year ended December 31, 1997. The Company has
changed its method used to compute per share results and restated the results
for all prior periods. The impact of SFAS 128 did not have a material effect on
the Company's earnings per share.
 
     In June 1997, the FASB issued Statement of Financial Accounting Standard
No. 130, "Reporting Comprehensive Income" ("SFAS 130"). Effective for periods
ending after December 15, 1997, including interim periods, SFAS 130 requires
companies to report comprehensive income and its components in a financial
statement and display the accumulated balance of other comprehensive income
separately from retained earnings and additional paid-in-capital. Comprehensive
income includes all changes in equity during a period except those resulting
from investments by stockholders and distributions to stockholders. The Company
has not yet seen any material impact from the implementation of SFAS 130.
 
     Also, in June 1997, the FASB issued Statement of Financial Accounting
Standard No. 131, "Disclosures about Segments of an Enterprise and Related
Information" ("SFAS 131"). This statement specifies revised guidelines for
determination of an entity's operating segments and the type and level of
financial information to be disclosed. SFAS 131 is effective for periods ending
after December 15, 1997, including interim periods. The Company's adoption of
SFAS 131 has not had any impact on its current financial reporting practices.
 
                                       63
<PAGE>   66
 
                               SUPERIOR NATIONAL
 
                                    BUSINESS
 
OVERVIEW
 
     Superior National is a holding company that, through its wholly owned
subsidiaries, SNIC and SPCC, underwrites and markets workers' compensation
insurance principally in the State of California and, until September 30, 1993,
was engaged in the underwriting and marketing of commercial P&C insurance. The
Company was incorporated in California in March 1985 and reincorporated in
Delaware in April 1997. SNIC and SPCC conduct business under the "Superior
Pacific" trade name. Unless the context indicates otherwise, "Superior Pacific,"
as used herein, refers to SNIC and SPCC and their combined operations from April
1997 to the present, and refers only to SNIC and its operations for all prior
periods.
 
     In April 1997, Superior National acquired Pac Rim, the parent company of
The Pacific Rim Assurance Company (subsequently renamed Superior Pacific
Casualty Company). SPCC's Southern California operations complement SNIC's
historical focus on Central and Northern California. As a result of the Pac Rim
Transaction, the Company believes that, excluding the State Fund, it is the
eighth largest California workers' compensation insurer overall, based upon 1996
direct written premium. Pro forma for the Pac Rim Transaction, the Company would
have had direct written premium of $182.2 million and $179.7 million for the
years ended December 31, 1996 and 1997, respectively. The Company had direct
written premium for the year ended December 31, 1997 (reflecting the SPCC
acquisition as of April 1, 1997) of $159.4 million, and had $41.4 million in
direct written premium in the first quarter of 1998. Pro forma for the
Acquisition of BIG, the Company would have had direct written premium of $823.3
million and $848.6 million for the years ended December 31, 1996 and 1997,
respectively, and $195.0 million in direct written premium in the first quarter
of 1998. The preceeding pro forma information is presented for illustrative
purposes only and is not necessarily indicative of the results of operations
that would have occurred had the Acquisition or the Pac Rim Transaction been
consummated on the dates assumed, nor is this pro forma information intended to
be indicative of the Company's future results of operations.
 
     In connection with the Pac Rim Transaction, the Company agreed with the DOI
that SPCC would operate in a "run-off" situation and that all new or renewal
business would be written only by SNIC. As a result, the Company has been
integrating SPCC's operations into SNIC's operations and has substantially
completed the process. The Pac Rim Transaction has enabled the Company to
increase its book of California workers' compensation insurance business and
generate significant expense savings through the consolidation of the back
office operations of the two companies.
 
     In addition to California, Superior Pacific is also licensed to write
business in Arizona, Arkansas, Colorado, District of Columbia, Georgia, Indiana,
Iowa, Kentucky, Maryland, Mississippi, Missouri, Montana, Nevada, New Mexico,
Oregon, South Dakota, Texas, Utah, and Wyoming, but virtually all of Superior
Pacific's current premium is generated in California (94%) and Arizona (6%).
Following the Pac Rim Transaction, SPCC's operations in states other than
California and Arizona were discontinued and are currently in run-off, but the
Company intends to maintain BIG's multi-state operations upon consummation of
the Acquisition.
 
STRATEGY
 
  Integration Strategy
 
     The Company acquired SPCC in April 1997 and has rapidly integrated SPCC's
operations into Superior Pacific. The Company believes it has achieved
significant expense savings through the integration of SPCC into Superior
Pacific. Although the Company does not expect any material cost savings to arise
in the short term out of the Acquisition of BIG, the benefits of economics of
scale could be realized over a period of years.
 
                                       64
<PAGE>   67
 
The Company's strategy for improving the overall financial performance of both
Superior Pacific and BIG includes:
 
     - Leadership in California Market. As the largest private sector workers'
       compensation insurer in California, the Company will be positioned to
       offer insureds and producers outstanding service, innovative loss control
       programs, and competitive pricing.
 
     - Nationwide Presence; Opportunities for Growth. The Company intends to
       maintain a nationwide presence and seek additional opportunities for
       growth outside of California, using an underwriting arrangement with an
       affiliate of Zurich (after its purchase of BICO), and the regional and
       branch network established by BIG.
 
     - Underwriting. The Company believes it can accomplish a gradual
       re-underwriting of BIG's book of business to enhance profitability. The
       pricing and persistency risk associated with the re-underwriting of
       larger accounts will be mitigated by ceding accounts with estimated
       annual premium of $25,000 or more at inception to a reinsurer.
 
     - Information Systems. The Company believes that its data processing
       systems will give Superior Pacific and BIG a significant competitive
       advantage by (i) enhancing the effectiveness of their employees'
       underwriting, policy administration, and claims activities, (ii)
       providing detailed, real-time, and near real-time information to
       management for control and administration purposes, and (iii) providing
       marketing benefits through improved customer service.
 
     - Loss Control and Claims Management. The Company believes BIG is a leader
       in loss control for workers' compensation, and expects to introduce
       innovative concepts developed by BIG, such as employer safety management
       schools, to Superior Pacific's business. Additionally, once a claim is
       made the Company expects to benefit from the Service Agreements with FHS,
       and the claim severity management services Superior Pacific will obtain
       from REM as part of the Claim Severity Management Program. These claim
       practices will continue to emphasize rapid medical intervention to
       mitigate the severity of injuries.
 
     - Producer Relationships. The Company intends to strengthen relationships
       with its producers, including nationally recognized insurance brokers who
       have longstanding relationships with BIG, in order to reach potential
       customers with nationwide operations. The Company endeavors to be the
       primary supplier of workers' compensation insurance for many of its
       producers. The Company will continue to emphasize its relationships with
       small- and medium-sized producers who often use the Company as a primary
       underwriter of workers' compensation insurance.
 
  Operating Strategy
 
     Superior National intends to continue to focus on the bottom line while
completing the integration of Superior Pacific and BIG. The key elements of its
strategy to maintain operating margins in its business are:
 
     - Focus on Specialized Market Segments. The Company's experienced
       management team utilizes a sophisticated information system to focus the
       Company's business on selected policy sizes and employment
       classifications that management believes provide the greatest opportunity
       for profitability.
 
     - Underwriting Discipline. Following the advent of open rating in
       California in 1995, some California workers' compensation insurers have
       reduced premium rates substantially to increase or maintain market share.
       The Company has not followed this practice and has maintained
       consistently stringent underwriting policies in order to maintain gross
       profit margins. As a result, although the Company experienced declines in
       premium until acquiring SPCC, from 1993 to 1997 the Company's combined
       ratio from continuing operations has improved from 100.2% to 90.9%.
 
EXPERIENCED MANAGEMENT; BUSINESS RELATIONSHIPS WITH ZURICH AFFILIATES
 
     The Company is led by an experienced management team, with the Chief
Executive Officer and the Chief Operating Officer having a combined 59 years of
workers' compensation insurance business experience both in and outside of
California. The experience of management and the Company's sophisticated data
processing systems allow the Company to react quickly to positive and negative
developments in its markets.
 
                                       65
<PAGE>   68
 
     In addition, the Company benefits from business relationships with
affiliates of Zurich, which have provided financing and access to their
expertise and products, including claim management services and reinsurance. The
Company currently maintains a facility that allows it to offer certain
policyholders insurance policies written by a Zurich affiliate having an A.M.
Best "A" rating. Affiliates of Zurich are providing services that the Company
has integrated into its Claim Severity Management Program. Furthermore, in
December 1997, Centre Reinsurance (Bermuda) Ltd. purchased $10.0 million of the
Trust Preferred Securities issued by the Company's subsidiary, the Trust. In
addition, in connection with the Acquisition of BIG, Zurich Centre Group LLC
will purchase BICO from the Company and establish an underwriting arrangement
with the Company for a fee equal to 2.5% of direct written premium plus a pass
through of all related expenses.
 
COMPANY STRUCTURE
 
     Superior National has two direct, wholly owned active subsidiaries:
Superior Pacific Insurance Group, Inc. ("SPIG") and the Trust, a statutory
business trust created under the laws of the State of Delaware. SPIG has four,
direct, wholly owned active subsidiaries: SNIC, SPCC, InfoNet Management
Systems, Inc. ("InfoNet"), and Superior (Bermuda) Ltd. ("SBL"). InfoNet provides
data processing purchasing services to Superior National and its Subsidiaries.
SBL was formed in September 1995 to facilitate the management of the run-off of
SNIC's P&C business.
 
     The Trust was formed by the Company in December 1997 and exists solely for
the purpose of issuing the Trust Preferred Securities, having an aggregate
liquidation amount of $105.0 million, and investing the proceeds thereof in an
equivalent amount of the Senior Subordinated Notes. The Company owns directly
all of the common securities issued by the Trust, which it purchased for an
aggregate consideration of approximately $3.25 million. See "Superior
National -- Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Liquidity and Capital Resources."
 
     SNIC's only subsidiary is wholly owned Western Select Service Corp., which
currently provides vocational rehabilitation, legal, paralegal, and other
services to SNIC and SPCC. SPCC has no active subsidiaries.
 
CALIFORNIA WORKERS' COMPENSATION MARKET
 
     Workers' Compensation. Workers' compensation is a no-fault statutory system
under which an employer is required to provide its employees with medical care
and other specified benefits for work-related injuries and diseases. There are
four types of benefits payable under workers' compensation policies: disability,
vocational rehabilitation, medical, and death benefits. The amount of benefits
payable for various types of claims is established by statute and varies with
the nature and severity of the injury or disease, and the wage, occupation, and
age of the employee. While no dollar limitations are set for medical benefits
and dollar limitations apply only under certain circumstances to vocational
rehabilitation benefits, reinsurance typically covers liability in excess of a
specified dollar amount agreed upon by the insurer and the reinsurer.
 
     California Marketplace. California is the country's largest workers'
compensation insurance market, with total direct written premium of $5.0 billion
in 1996, the latest year for which industry data are available. The California
market is composed of (i) the State Fund, (ii) companies, including BIG, that
write workers' compensation insurance in California but have significant
writings in other lines of business and/or in other states, and (iii) the
Company, which, prior to the Acquisition, is the one private sector company that
writes exclusively workers' compensation insurance specifically focused in
California. The State Fund, which is obligated to write workers' compensation
insurance for any applicant, including those turned down by the private sector
carriers, is the largest underwriter of workers' compensation insurance in
California, accounting for approximately 19% of the direct written premium in
California in 1996. Because the State Fund must accept all risks, its combined
ratios have historically been much higher than those of the private sector
carriers. Despite these results, the State Fund has consistently achieved
profitability through the investment income earned on its large invested asset
base. As of December 31, 1996, the State Fund had invested assets of $7.0
billion and statutory capital and surplus of $1.6 billion. The State Fund
currently maintains an "A" claims paying ability rating from S&P and an "A-"
rating from A.M. Best. Although the State Fund regularly competes with the
Company for profitable underwriting business, the Company views the State Fund's
role as
                                       66
<PAGE>   69
 
the insurer of last resort to be a significant benefit because it eliminates the
need to create an assigned risk plan in which the Company and other insurers
conducting business in California would be required to participate.
 
     Pricing. Prior to January 1, 1995, the DOI set minimum premium rates for
workers' compensation insurance to provide a stable environment for the pricing
of such insurance. On January 1, 1995, the State of California formally
converted to a system of "open rating" for workers' compensation insurance
written within the state. Insurance companies now file and use their own
actuarially defensible rates. Following the introduction of open rating, total
direct written premium in the California market decreased from $9.0 billion in
1993 to $5.0 billion in 1996 as many carriers engaged in price competition.
 
     Under open rating, the DOI sets "pure premium" (effectively, the estimated
claim and allocated claim adjustment expense) rates for each employment
classification. Carriers then apply their own multipliers to the pure premium
rate to adjust for that carrier's anticipated unallocated claim adjustment and
underwriting expenses. These rates are then subject to further adjustment on a
policyholder by policyholder basis to account for historical loss experience,
the presence of stricter safety programs, differing dividend and commission
plans, and other factors.
 
     Recent Results. The State Fund's relatively poor underwriting results,
together with its large size, have created a skewed perception of the
underwriting profitability of companies writing business in the California
workers' compensation marketplace. Although market-wide combined ratios have
increased, responsible underwriters, such as Superior National, have been able
to achieve an underwriting profit. The results of the State Fund and of the
total industry under SAP are detailed below (1997 data is not yet available):
 
<TABLE>
<CAPTION>
                                    1996                  1995                  1994                  1993
                             ------------------    ------------------    ------------------    ------------------
                             STATE                 STATE                 STATE                 STATE
                              FUND     INDUSTRY     FUND     INDUSTRY     FUND     INDUSTRY     FUND     INDUSTRY
                             ------    --------    ------    --------    ------    --------    ------    --------
                                                                (IN MILLIONS)
<S>                          <C>       <C>         <C>       <C>         <C>       <C>         <C>       <C>
Premiums...................  $  992    $ 5,779     $1,073     $5,855     $1,456     $7,655     $1,705     $8,965
Loss Ratio.................   111.8%      94.4%      87.0%      75.7%      71.0%      67.8%      96.1%      80.4%
Expense Ratio..............    21.1       20.6       17.0       20.0       12.6       17.8       11.1       15.4
Policyholder Dividend
  Ratio....................    11.8        6.5       26.3       15.1       23.3       14.2        9.8        7.4
                             ------    -------     ------     ------     ------     ------     ------     ------
Combined Ratio.............   144.7%     121.5%     130.3%     110.8%     106.9%      99.8%     117.0%     103.2%
                             ======    =======     ======     ======     ======     ======     ======     ======
Underwriting Gain (Loss)...  $ (443)   $(1,244)    $ (325)    $ (632)    $ (102)    $   15     $ (290)    $ (286)
Investment Income..........     473         NA        490      1,740        502      1,623        531      2,178
                             ------    -------     ------     ------     ------     ------     ------     ------
Pre-Tax Income.............  $   30         NA     $  165     $1,108     $  400     $1,638     $  241      1,892
                             ======    =======     ======     ======     ======     ======     ======     ======
</TABLE>
 
     Recent Developments. While competitive pressures in the California's
workers' compensation insurance market increased with the implementation of open
rating in January 1995, certain fundamentals of the workers' compensation
insurance market have recently improved. In 1996, the total direct workers'
compensation written premium in California leveled out at approximately $5.0
billion as compared to $9.0 billion in 1993, as the market began to experience
rate stabilization. Based on the Company's analysis of data obtained from the
WCIRB and other sources, this trend continued into 1997, as demonstrated by a
slight improvement in premium pricing of 0.5% for the year ended December 31,
1997 over 1996. Additionally, anti-fraud legislation passed by the State of
California in 1993 continues to have a positive effect on the market's losses by
controlling fraudulent claims and medical and legal expense levels. These
improvements have resulted in a reduction in the frequency of claims in the
California workers' compensation market. However, beginning in 1997, the Company
has recognized an increase in claim severity for injuries sustained in 1995 and
thereafter. Management has taken steps to address this issue by undertaking the
Claim Severity Management Program. See "-- Claim Severity Management Program"
and "-- Claim and Claim Adjustment Expense Reserves" and "Certain
Considerations -- Uncertainty Associated with Estimating Reserves for Unpaid
Claim and Claim Adjustment Expenses."
 
     Superior Pacific Within the California Workers' Compensation Market. After
the Acquisition the Company believes that it will be better positioned than its
competitors to compete successfully in the post-open rating California workers'
compensation insurance market, while also reducing somewhat its dependence on
California for growth and profitability. The Company believes it will benefit
from its focus on workers' compensation insurance, and that its leadership
position in the California market will allow it to offer insureds
 
                                       67
<PAGE>   70
 
and producers outstanding service, innovative loss control programs, and
competitive pricing. The national presence provided by the Acquisition will give
the Company some diversification from the California market, offering what the
Company believes are attractive growth opportunities in a number of markets. The
Company continues to believe that pricing and underwriting policies designed
specifically for workers' compensation means that its workers' compensation
insurance business should perform better financially than the workers'
compensation business of insurers who offer workers' compensation policies to
insureds as part of a package of insurance.
 
MARKETING
 
     Superior Pacific primarily markets its insurance products through
approximately 250 small- to medium-sized producers located throughout California
and Arizona, most of which have an ongoing relationship with the Company's
executives. Because these producers also represent one or more competing
insurance companies, Superior Pacific views the producers as its marketing
target and delivers service the Company believes surpasses normal industry
levels. Superior Pacific's percentage of business with each of its producers, in
terms of premium volume, has a significant effect on a producer's efforts,
because management believes companies that represent a significant volume of a
producer's business typically receive the highest quality business. The Company
is one of the primary underwriters of workers' compensation insurance for most
of its producers. During the year ended December 31, 1997, no single producer
controlled more than 5.0% of premium in force.
 
     While the Company's principal marketing strategy is to meet the business
needs of Superior Pacific's producers by providing the insurance coverage and
services needed by their customers, the Company has concentrated its marketing
efforts on policies with annual premium under $50,000, principally to avoid the
extreme price competition usually associated with larger insureds. As of
December 31, 1997, the Company's average annual premium per policy was
approximately $8,300. In 1998, the Company initiated a program to market
coverage to selected large accounts that meet the Company's underwriting
criteria.
 
     Approximately 57.9% of the Company's premium in force is concentrated in
925 non-group policies and 291 group programs that each provide annual premium
in excess of $25,000. The average annual premium volume generated by each of
Superior Pacific's group programs is approximately $820,000 and in the aggregate
these programs represent 31.1% of the Company's premium in force. Because
policies issued through group programs reflect some of the attributes of smaller
non-group policies, marketing workers' compensation insurance through such
programs to reach smaller policyholders is a means by which the Company can
implement its strategy to underwrite smaller policies. For example, individual
policies within a group typically possess rate adequacy associated with small
non-group accounts. Moreover, renewal rates within a group are generally
superior to non-group business. However, group programs, because of their
overall premium, also reflect some of the attributes of large non-group
policies, mainly their greater vulnerability to price competition than the
individual accounts within the group.
 
     The average size of Superior Pacific's non-group policies that exceed
$25,000 in annual premium is approximately $76,424 and those policies in the
aggregate represent 47.1% of premium in force. Most of these policies were
obtained by the Company upon its acquisition of SPCC. The Company's strategy is
to maintain adequate pricing on accounts regardless of their size, and in
pursuing this strategy the Company has been unable to retain a portion of these
large non-group policies. However, the Company expects to replace many of them
with new, smaller accounts through its newly acquired relationships with
policyholders and producers previously associated with Pac Rim, and with larger
accounts (where adequate pricing can be obtained) through the Company's new
large account marketing program.
 
     Superior Pacific closely monitors its producers through its on-line
management information systems, with special attention given to the volume and
profitability of business written through Superior Pacific. Relationships with
producers who consistently write unprofitable business, or do not meet the
minimum guideline of annual premium per year, may be terminated. Superior
Pacific believes that by continually monitoring and improving the quality of the
business acquired through its producers, long-term profitability will be
enhanced. See "-- Information Services."
 
                                       68
<PAGE>   71
 
     The marketing staff, along with the branch office managers and the
underwriting, loss control, and regional claim staffs, work closely with
producers and frequently make joint presentations with producers to potential
workers' compensation policyholders. Superior Pacific conducts its marketing by
territory to enable its marketing representatives to better address the specific
types of accounts located in each region.
 
     Producer commissions are generally determined by negotiation and are
dependent on the size and profit potential of the producer's accounts. Superior
Pacific's average direct commission rate was 11.1% for the years ended December
31, 1997 and 1996, and 12.0% in 1995. The Company believes the stabilization in
the average direct commission rate for the year ended December 31, 1997 was due
primarily to a combination of firming prices and a greater use by larger
policyholders of fee-based arrangements (as opposed to traditional commission
arrangements) with their insurance producers. Superior Pacific's producers are
not permitted to bind Superior Pacific with respect to any account. All new and
renewal policyholder applications must be submitted to Superior Pacific for
approval. Superior Pacific is not committed to accept a fixed portion of any
producer's business.
 
UNDERWRITING
 
     Because the types of accounts that Superior Pacific insures vary among
different geographic regions, Superior Pacific conducts its underwriting
activities through branch offices that are focused on the local economies. While
Superior Pacific underwrites over 400 of the approximately 500 employment
classifications established by the WCIRB, it targets specific classifications
that management believes to be profitable. The Company believes that by focusing
on certain employment classifications, it can provide claim management and
standardized loss control services at a level appropriate to each policyholder.
For the year ended December 31, 1997, five employment classifications, made up
primarily of office and clerical, hospitality, agricultural, garment, and health
care workers, represented approximately 35% of Superior Pacific's premium in
force. The Company excludes most employment classifications that represent
historically higher risk exposure, including the manufacturing, handling, and
shipping of explosives; oil rig and derrick work; subway construction; and
navigation of marine vessels. Classifications that require the approval of
Superior Pacific's principal underwriting officer include those that represent
potential exclusions from Superior Pacific's reinsurance treaties, unusual
hazards, or catastrophic exposures such as taxicab fleets, carnivals, ski
resorts, and detective agencies. Certain risks, such as the transportation of
groups of employees, are generally ceded to reinsurers under separate
reinsurance agreements.
 
     Prior to insuring an account, Superior Pacific's underwriting department
reviews, inter alia, the employer's prior loss experience and safety record,
premium payment and credit history, operations, geographic location, and
employment classifications. Superior Pacific verifies employment classifications
principally through information provided by the WCIRB and, in many instances,
through its own on-site surveys of the employer's place of business.
 
     The Company's underwriting system is a fully integrated, computerized,
rating, quoting, and policy issuance system for use both internally and remotely
from producers' offices. The system contains edit and blocking features that
prohibit underwriters from issuing policies associated with business that is
deemed inappropriate or undesirable by management, or that may be
inappropriately priced. See "-- Information Services."
 
     SPCC historically underwrote larger accounts than SNIC, and in a more
limited range of risk classification codes. Since SPCC's acquisition, Superior
Pacific has been re-underwriting SPCC's book of business at policy renewal dates
in conformity with SNIC's historic underwriting standards and pricing
guidelines. SPCC's average policy size has declined significantly, standing at
approximately $17,000 for the policy year ended December 31, 1997, versus
approximately $20,300 for the policy year ended December 31, 1996. Management
believes that the re-underwriting of SPCC's business will produce a new book of
business mirroring SNIC's historical book of business, both as to size and range
of risk classifications, by the end of 1998.
 
     Virtually all of SPCC's business is located in urban and suburban Southern
California. Until 1993, claim experience in Southern California was more
volatile and less favorable than the remainder of the state. Further, since open
rating began in 1995, the relatively large accounts that SPCC has underwritten
have been
 
                                       69
<PAGE>   72
 
subject to extreme price competition, consequently, the nature of SPCC's
historical book of business may cause historical claim reserves to be subject to
more uncertainty versus claim reserves established on prospective business.
 
LOSS CONTROL
 
     In addition to its responsibility for risk evaluation as part of the
underwriting process, Superior Pacific's loss control department may assist
policyholders in developing and maintaining safety programs and procedures to
minimize on-the-job injuries and health hazards. After analyzing the
policyholder's loss profile, Superior Pacific's loss control consultants will
help develop a loss control program and establish accident reporting and claim
follow-up activities for the policyholder. Superior Pacific's loss control
personnel may also consult with policyholder management about safety and health
issues, as well as about the effectiveness of the policyholder's loss prevention
procedures.
 
CLAIM SEVERITY MANAGEMENT PROGRAM
 
     Effective December 31, 1997, the Company entered into agreements with REM
and Zurich Reinsurance (North America), Inc. ("ZRNA"), affiliates of Zurich, to
provide claim management services for its Claim Severity Management Program
("CSMP"). Under the CSMP, REM, acting as a third party administrator ("TPA"),
provides claim processing and management services to Superior Pacific, and ZRNA
provides Superior Pacific with protection predicated on REM's ability to reduce
Superior Pacific's severity. The Company may terminate the contract with six
months notice after the initial three-year term of the contract, with a penalty
that will not exceed $250,000 plus REM's reasonable expenses to unwind the
agreement.
 
     REM, in its capacity as a TPA, will provide certain claim management
services, while the Company will provide claims facilities and data processing
systems. All of the Company's claims personnel have been moved to an independent
contractor service provider as part of the CSMP. The terms of the agreement bind
REM to certain operational restrictions and performance standards designed to
assure quality claims administration. The Company believes that combining REM's
claim management techniques with the Company's claim processing systems should
produce material improvements in the Company's claim severity, more than
offsetting the cost of such services. The Company believes the CSMP will reduce
the Company's ultimate loss cost severity with favorable cost-benefit
trade-offs.
 
     Under the agreement with ZRNA, ZRNA will credit the Company's direct claim
costs, up to an aggregate of $30.0 million, to the extent that REM is
unsuccessful in minimizing the claim severity.
 
     The Company's claims services are provided primarily by Comprehensive
Compensation Claims Management, Inc. ("3CM"), which was formed with the support
of the Company and REM for that purpose. The Company and REM will continue to
work closely with policyholders to return injured workers to the job as quickly
as is medically appropriate. 3CM will continue to maintain for the Company four
full service claim service offices ("CSOs") in California, which are located in
Woodland Hills, Fresno, Pleasanton, and Sacramento. Additionally, the Company
will use a 3CM CSO in Phoenix, Arizona. Each CSO is managed by a claims manager.
The claims technical staffs are organized into units with, generally, one
supervisor supervising four claims examiners and two claims assistants per unit.
 
     3CM relies extensively on the Company's data processing systems. The
Company's data processing systems were developed internally through a joint
effort of the claim and management information systems departments' personnel
with three goals in mind: capture timely and meaningful data, reduce the
possibility of human error through a series of system prompts and edit checks,
and automate manual functions. An additional benefit of the claims system is the
increased productivity, as a result of claims examiners' handling larger case
loads.
 
     3CM's claims handling also includes a specialized subrogation function.
Claims examiners are responsible for the identification of potential recoupments
from third parties responsible for a work-related accident, after which the
examiner notifies a subrogation specialist of this potential. The subrogation
specialist determines whether a subrogation situation exists, and, if so,
assumes responsibility for all aspects of subrogation to finalization.
 
                                       70
<PAGE>   73
 
CLAIM AND CLAIM ADJUSTMENT EXPENSE RESERVES
 
     Several years or more may elapse between the occurrence of a workers'
compensation loss, the reporting of the loss, and final payment of the loss.
Claim and claim adjustment expense reserves are estimates of what an insurer
expects to pay claimants. Superior Pacific is required to maintain reserves for
payment of estimated claim and claim adjustment expense for both reported claims
and claims that have been incurred but not reported ("IBNR"). Superior Pacific's
ultimate liability may be materially more or less than current reserve
estimates.
 
     Reserves for reported claims are established on a case-by-case basis.
Case-by-case reserve amounts are determined by claim examiners, based on the
examiner's judgment and experience, and on Superior Pacific's reserving
practices, which take into account the type of risk, the circumstances
surrounding the claim or policy provisions relating to type of loss, and
historical paid claim and claim adjustment expense data for similar claims.
Case-by-case reserves are not established for claim adjustment expense, and the
entire reserve for claim adjustment expense is established primarily based upon
the Company's historical paid data. Superior Pacific's claims services providers
regularly monitor reserve adequacy for claims that have occurred and been
reported and Superior Pacific adjusts such reserves as necessary.
 
     Claim and claim adjustment expense reserves for IBNR are estimated based on
many variables including historical and statistical information, inflation,
legal developments, the regulatory environment, benefit levels, economic
conditions, judicial administration of claims, general frequency and severity
trends, medical costs, and other factors affecting the adequacy of loss
reserves. See "Risk Factors -- Uncertainty Associated with Estimating Reserves
for Unpaid Claim and Claim Adjustment Expense." The senior officers of the
Company review and adjust IBNR reserves monthly.
 
     Adjustments in aggregate reserves are reflected in the operating results of
the period during which such adjustments are made. Although claims for which
reserves are established may not be paid for several years or more, the reserves
are not discounted, except to calculate taxable income as required by the Code.
 
     The following table provides a reconciliation of the beginning and ending
claim and claim adjustment expense reserves for each of the years in the
three-year period ended December 31, 1997, computed in accordance with GAAP.
 
       RECONCILIATION OF LIABILITY FOR CLAIM AND CLAIM ADJUSTMENT EXPENSE
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31,
                                                             --------------------------------
                                                               1997        1996        1995
                                                             --------    --------    --------
                                                                      (IN THOUSANDS)
<S>                                                          <C>         <C>         <C>
Beginning reserve, gross of reinsurance....................  $115,529    $141,495    $171,258
Less: Reinsurance recoverable on unpaid losses.............    24,986      27,076      31,897
                                                             --------    --------    --------
Beginning reserve, net of reinsurance......................    90,543     114,419     139,361
Pac Rim reserves at acquisition............................   104,588          --          --
Provision for net claim and claim adjustment expenses:
  For claims occurring in current year.....................    95,826      57,614      58,842
  For claims occurring in prior years......................    (5,379)     (1,976)     (4,872)
                                                             --------    --------    --------
  Total claim and claim adjustment expenses................    90,447      55,638      53,970
                                                             --------    --------    --------
Payments for net claim and claim adjustment expense:
  Attributable to insured events incurred in current
     year..................................................   (37,945)    (19,816)    (19,732)
  Attributable to insured events incurred in prior years...   (95,533)    (59,698)    (59,180)
                                                             --------    --------    --------
  Total claim and claim adjustment expense payments........  (133,478)    (79,514)    (78,912)
                                                             --------    --------    --------
Ending reserves, net of reinsurance........................   152,100      90,543     114,419
Reinsurance recoverable on unpaid losses...................    49,155      24,986      27,076
                                                             --------    --------    --------
Ending reserves, gross of reinsurance......................  $201,255    $115,529    $141,495
                                                             ========    ========    ========
</TABLE>
 
     During 1997, the Company continued to experience decreased frequency of
claims and at the same time experienced an increase in claim severity for
accident years 1995 and thereafter. The Company's net claim and
 
                                       71
<PAGE>   74
 
claim adjustment expense ratio for accident year 1997 at the end of calendar
year 1997 was 68.0%, versus 65.0% and 65.6% for accident years 1996 and 1995 at
their respective calendar year ends.
 
     In 1997, the Company experienced approximately $5.4 million in favorable
development on net claim and claim adjustment expense reserves estimated at
December 31, 1996. This $5.4 million favorable development is the result of a
$10.8 million favorable development on ceded reserves for accident years 1996
and prior. The $10.8 million favorable development on ceded reserves is
attributable to SPCC and due to the post-acquisition review of all open claim
files and the subsequent adjustment to reserves, which caused many claims to
have incurred claim and claim adjustment expenses in excess of the retention on
SPCC's reinsurance treaties. The $10.8 million favorable development is offset
by a $5.4 million adverse development on direct reserves attributable to the
accident years 1995 and 1996. The Company believes similar adverse development
has been experienced throughout the California workers' compensation industry,
perhaps due to an increase in claim severity.
 
     In 1996, the Company experienced approximately $2.0 million in favorable
development on net claim and claim adjustment expense reserves estimated at
December 31, 1995. This $2.0 million favorable development is the result of $8.4
million in favorable development on direct reserves for accident years 1994 and
prior. The favorable development was offset in part by $4.1 million in adverse
development on direct reserves for accident year 1995. The accident year net
claim and claim adjustment expense ratio for accident year 1995 at the end of
calendar year 1995 was 65.6% versus 74.6% at the end of the 1996 calendar year.
The Company believes, from its review of data obtained by the WCIRB, that
similar adverse development has been experienced throughout the California
workers' compensation industry.
 
     During 1995, the Company experienced approximately $8.6 million of
favorable development on direct claim and claim adjustment expense reserves
estimated at December 31, 1994. Management believes the favorable development
resulted from the Company's improved claims management controls and decreased
claim severity, particularly in the medical component of the workers'
compensation line. Similar favorable development on pre-1995 losses has been
experienced elsewhere in the California workers' compensation industry.
Offsetting the favorable direct development in large part was the re-estimation
during 1995 of reinsurance receivables recorded at December 31, 1994, from
approximately $66.2 million to approximately $59.9 million at December 31, 1995.
 
     On April 11, 1997, the Company acquired SPCC. The claim and claim
adjustment expenses related to SPCC for this analysis are reflected in the
Company's 1997 claim and claim adjustment expense balances regardless of the
year the claim was previously reported to SPCC. To the extent that claims
develop in the future or close favorably, the result will be reflected in the
calendar year development to which it relates.
 
                                       72
<PAGE>   75
 
     The following table discloses the development of direct workers'
compensation claim and claim adjustment expense reserves of Superior Pacific
from December 31, 1987 through December 31, 1997.
 
       ANALYSIS OF DIRECT CLAIM AND CLAIM ADJUSTMENT EXPENSE DEVELOPMENT
<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
                            ---------------------------------------------------------------------------------
                             1987      1988      1989      1990       1991       1992       1993       1994
                            -------   -------   -------   -------   --------   --------   --------   --------
                                                             (IN THOUSANDS)
<S>                         <C>       <C>       <C>       <C>       <C>        <C>        <C>        <C>
Reserve for Unpaid Losses
  and Loss Adjustment
  Expenses, Gross of
  Reinsurance Recoverables
  Reserve.................  $21,969   $42,268   $60,615   $88,270   $116,811   $136,102   $171,038   $171,258
Reserve Re-estimated as
  of:
  One Year Later..........   24,241    43,581    68,718   112,160    144,676    162,634    171,960    162,635
  Two Years Later.........   26,120    46,788    79,059   111,151    143,912    148,906    161,262    145,626
  Three Years Later.......   29,140    50,955    74,619   117,506    138,607    152,420    148,654    144,173
  Four Years Later........   29,423    47,696    78,112   113,029    137,939    144,898    148,983
  Five Years Later........   29,541    49,297    75,475   112,840    135,074    146,867
  Six Years Later.........   29,082    47,554    75,913   109,655    138,048
  Seven Years Later.......   27,759    49,470    74,149   111,871
  Eight Years Later.......   27,846    48,653    75,898
  Nine Years Later........   27,573    49,451
  Ten Years Later.........   27,803
Cumulative (Deficiency)
  Redundancy..............   (5,834)   (7,183)  (15,283)  (23,601)   (21,237)   (10,765)    22,055     27,085
 
Cumulative Amount of
  Reserve Paid through:
  One Year Later..........  $ 9,447   $17,698   $24,478   $42,627   $ 53,914   $ 57,348   $ 60,726   $ 67,757
  Two Years Later.........   14,482    19,879    35,195    51,160     56,299     61,648     66,077     61,952
  Three Years Later.......   15,777    25,830    38,067    52,761     63,354     63,523     64,464     67,388
  Four Years Later........   18,666    26,165    38,261    57,332     64,703     66,547     66,754
  Five Years Later........   19,384    26,026    40,794    59,093     68,152     66,750
  Six Years Later.........   19,660    27,181    42,032    59,917     69,052
  Seven Years Later.......   20,707    27,202    43,146    60,749
  Eight Years Later.......   20,803    27,947    42,898
  Nine Years Later........   21,123    27,857
  Ten Years Later.........   20,899
Gross Reserve -- December 31...........................................................   $171,038   $171,258
Reinsurance Recoverables...............................................................     28,971     31,897
                                                                                          --------   --------
                                                                                           142,067    139,361
Reclassification of Amounts Recoverable from Centre Re.................................    (42,032)   (34,269)
                                                                                          --------   --------
Net Reserve -- December 31.............................................................   $100,035   $105,092
                                                                                          ========   ========
Gross Re-estimated Reserve.............................................................   $148,983   $144,173
Re-estimated Reinsurance Recoverables..................................................     25,775     34,083
                                                                                          --------   --------
                                                                                           123,208    110,090
Reclassification of Amounts Recoverable from Centre Re.................................     42,032     34,269
                                                                                          --------   --------
Net Re-estimated Reserve...............................................................   $ 81,176   $ 75,821
                                                                                          ========   ========
Net Cumulative Redundancy..............................................................   $ 18,859   $ 29,271
                                                                                          ========   ========
 
<CAPTION>
                               YEAR ENDED DECEMBER 31,
                            ------------------------------
                              1995       1996       1997
                            --------   --------   --------
                                    (IN THOUSANDS)
<S>                         <C>        <C>        <C>
Reserve for Unpaid Losses
  and Loss Adjustment
  Expenses, Gross of
  Reinsurance Recoverables
  Reserve.................  $141,495   $115,529   $201,255
Reserve Re-estimated as
  of:
  One Year Later..........   137,242    120,999
  Two Years Later.........   145,209
  Three Years Later.......
  Four Years Later........
  Five Years Later........
  Six Years Later.........
  Seven Years Later.......
  Eight Years Later.......
  Nine Years Later........
  Ten Years Later.........
Cumulative (Deficiency)
  Redundancy..............    (3,714)    (5,470)
Cumulative Amount of
  Reserve Paid through:
  One Year Later..........  $ 63,587   $ 69,658
  Two Years Later.........    72,946
  Three Years Later.......
  Four Years Later........
  Five Years Later........
  Six Years Later.........
  Seven Years Later.......
  Eight Years Later.......
  Nine Years Later........
  Ten Years Later.........
Gross Reserve -- December 31 ..........................................................   $141,495   $115,529   $201,255
Reinsurance Recoverables...............................................................     27,076     24,986     49,155
                                                                                          --------   --------   --------
                                                                                           114,419     90,543    152,100
Reclassification of Amounts Recoverable from Centre Re ................................    (11,696)        --         --
                                                                                          --------   --------   --------
Net Reserve -- December 31 ............................................................   $102,723   $ 90,543   $152,100
                                                                                          ========   ========   ========  
Gross Re-estimated Reserve ............................................................   $145,209   $120,999
Re-estimated Reinsurance Recoverables .................................................     35,648     35,835
                                                                                          --------   --------
                                                                                           109,561     85,164
Reclassification of Amounts Recoverable from Centre Re ................................     11,696         --
                                                                                          --------   --------
Net Re-estimated Reserve...............................................................   $ 97,865   $ 85,164
                                                                                          ========   ========
Net Cumulative Redundancy..............................................................   $  4,858   $  5,379
                                                                                          ========   ========

</TABLE>
 
                                       73
<PAGE>   76
 
     The first line of the preceding table depicts the estimated liability for
unpaid claim and claim adjustment expense recorded on the balance sheets of
Superior Pacific at the indicated balance sheet dates. This liability represents
the estimated amount of claim and claim adjustment expense for claims arising
during all years prior to the indicated balance sheet date that are unpaid as of
that balance sheet date, gross of reinsurance recoverables, including losses
that have been incurred but not yet reported. The table also shows the re-
estimated liability as of the end of each succeeding year through the latest
balance sheet date, and the cumulative payments made for such claims, at annual
intervals after the initial indicated balance sheet date. The claim and claim
adjustment expense liability estimates change as more information becomes known
about the frequency and severity of claims for each year. A direct reserve
redundancy or deficiency is displayed for each balance sheet date in the center
of the table when the initial liability estimate is greater (or less) than the
re-estimated liability at the latest balance sheet date. A net-of-reinsurance
redundancy is displayed for each of the years ended December 31, 1993, 1994,
1995, and 1996 at the bottom of the table.
 
     The direct reserve deficiencies associated with the years ended December
31, 1987 and 1988 were due to the lack of claim and claim adjustment expense
history, which prevented management from accurately estimating ultimate claim
costs. The direct deficiencies associated with reserves as of December 31, 1989,
1990, 1991, and 1992 were due to unexpected increases in claim costs resulting
from increased litigation in the California workers' compensation system, an
economic recession in California, and workers' compensation laws that at the
time effectively encouraged workers to file unwarranted psychiatric stress and
fraudulent claims. The direct redundancies associated with the years ended
December 31, 1993 and 1994 occurred as a result of significant reforms in the
California workers' compensation laws that became effective January 1, 1993 and
an improvement in the California economy that were not anticipated when reserves
were established. The direct reserve deficiencies associated with the years
ended December 31, 1995 and 1996 occurred as a result of unexpected increases in
severity affecting claims occurring in 1995 and 1996.
 
     Superior Pacific's experience with direct reserve deficiencies occurring
for the years ended December 31, 1989 through 1992, 1995, and 1996 and direct
redundancies occurring for the years ended December 31, 1993 and 1994 is
consistent with the results experienced by the California workers' compensation
industry during the same time periods. The underlying improvement in claim
frequency and severity during the years ended December 31, 1993 and 1994 that
caused Superior Pacific to develop direct redundant reserves is also consistent
with industry experience. The direct reserve deficiencies occurring for the
years ended December 31, 1995 and 1996 resulted from unexpected increases in
claim severity, consistent with some California workers' compensation insurers'
experience. The net-of-reinsurance redundancies displayed at the bottom of the
table reflect Superior Pacific's per risk excess of loss, quota share, and
aggregate excess of loss reinsurance, the effects of which were to reduce
Superior Pacific's direct redundancies/deficiencies due to the cession to a
reinsurer of a portion of Superior Pacific's favorable development.
 
     Currently, management prepares on a monthly basis a comprehensive analysis
of workers' compensation experience, and the process of estimating claim and
claim adjustment expense liabilities is continually modified to consider
additional information regarding trends in pricing, frequency, and severity.
However, conditions and trends that have historically affected Superior
Pacific's claims may not necessarily be indicative of conditions and trends that
will affect future claims, and it is not appropriate to extrapolate future
reserve redundancies or deficiencies based on the data set forth above.
 
     By frequently reviewing reserves and utilizing sophisticated data
processing systems, management is generally able to detect trends in claim and
claim adjustment expenses and take appropriate actions in a timely manner to
avoid having to increase reserves substantially at a later date. For example,
the Company was one of the first to recognize and quantify the increase in claim
severity appearing in claims with 1995 and subsequent dates of injury.
Recognition of this shift has enabled management to take pro-active steps, an
example of which is its undertaking of the CSMP. See "-- Claim Severity
Management Program."
 
DISCONTINUED OPERATIONS
 
     Superior Pacific's discontinued operations consist of P&C business that was
discontinued effective September 30, 1993. The discontinued operations
liabilities principally pertain to contractors' general liability
 
                                       74
<PAGE>   77
 
policies underwritten during the years 1986 through 1990. There is often a
significant lag between the date of loss of construction-related claims and the
date such claims are reported to Superior Pacific. Superior Pacific believes the
existing provision is sufficient to cover future claims, but there is
significant uncertainty associated with the reporting and severity of
construction claims. Management estimates that discontinued operations will
essentially have "run-off" by the year 2000.
 
     In 1993, the Company recorded a pre-tax charge to income of $4.5 million
for estimated operating losses during the phase-out period. During the second
quarter of 1995, the Company increased by approximately $15.0 million its
reserves for discontinued operations for accident years 1993 and prior and has
not increased them since.
 
     The following table provides a reconciliation of the beginning and ending
claim and claim adjustment expense reserves for discontinued operations for each
of the years in the three-year period ended December 31, 1997, computed in
accordance with GAAP.
 
       RECONCILIATION OF LIABILITY FOR DISCONTINUED OPERATIONS CLAIM AND
                            CLAIM ADJUSTMENT EXPENSE
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                              -------------------------------
                                                               1997        1996        1995
                                                              -------    --------    --------
                                                                      (IN THOUSANDS)
<S>                                                           <C>        <C>         <C>
Beginning reserve, gross of reinsurance.....................  $25,466    $ 40,526    $ 36,410
Less: Reinsurance recoverable on unpaid losses..............    6,976       9,159       8,777
                                                              -------    --------    --------
Beginning reserve, net of reinsurance.......................   18,490      31,367      27,633
Provision for net claim and claim adjustment expenses:
  For claims occurring in current year......................       --          --          --
  For claims occurring in prior years.......................       --          --      15,006
                                                              -------    --------    --------
          Total claim and claim adjustment expenses.........       --          --      15,006
                                                              -------    --------    --------
Payments for net claim and claim adjustment expense:
  For claims occurring in current year......................       --          --          --
  For claims occurring in prior years.......................   (5,020)    (12,877)    (11,272)
                                                              -------    --------    --------
          Total claim and claim adjustment expense
            payments........................................   (5,020)    (12,877)    (11,272)
                                                              -------    --------    --------
Ending reserves, net of reinsurance.........................   13,470      18,490      31,367
Reinsurance recoverable on unpaid losses....................    5,216       6,976       9,159
                                                              -------    --------    --------
Ending reserves, gross of reinsurance.......................  $18,686    $ 25,466    $ 40,526
                                                              =======    ========    ========
</TABLE>
 
                                       75
<PAGE>   78
 
     The following table discloses the development of discontinued operations
direct claim and claim adjustment expense reserves from December 31, 1987
through December 31, 1997.
 
 ANALYSIS OF DISCONTINUED OPERATIONS DIRECT CLAIM AND CLAIM ADJUSTMENT EXPENSE
                                  DEVELOPMENT
<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
                          -------------------------------------------------------------------------------------
                            1987       1988       1989       1990       1991       1992       1993       1994
                          --------   --------   --------   --------   --------   --------   --------   --------
                                                             (IN THOUSANDS)
<S>                       <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
Reserve for Direct
  Unpaid Claim and Claim
  Adjustment Expenses,
  Gross of Reinsurance
  Recoverables
  Reserve...............  $ 12,678   $ 25,935   $ 41,088   $ 56,735   $ 65,629   $ 66,532   $ 54,898   $ 36,410
Re-estimated as of:
  One Year Later........    19,879     32,395     56,093     73,295     83,770     73,298     56,041     54,855
  Two Years Later.......    25,865     43,160     60,679     89,336     91,453     73,067     75,073     55,622
  Three Years Later.....    30,455     43,585     72,860     98,206     90,717     96,531     76,079     60,849
  Four Years Later......    30,134     52,261     82,218    102,538    117,215     92,569     82,026
  Five Years Later......    34,215     61,539     84,304    126,431    113,084     99,009
  Six Years Later.......    38,051     63,072    103,326    123,722    119,112
  Seven Years Later.....    38,844     77,080    104,428    130,055
  Eight Years Later.....    44,129     78,938    108,897
  Nine Years Later......    44,866     80,906
  Ten Years Later.......    45,315
Cumulative
  (Deficiency)..........   (32,637)   (54,971)   (67,809)   (73,320)   (53,483)   (32,477)   (27,128)   (24,439)
Cumulative Amount of
  Reserve Paid Through
  One Year Later........  $  7,529   $ 13,754   $ 19,839   $ 27,397   $ 29,274   $ 26,473   $ 23,043   $ 14,329
  Two Years Later.......    13,146     15,301     26,399     35,278     29,165     23,483     16,203     16,765
  Three Years Later.....    15,900     19,844     32,188     39,203     28,136     18,380     19,649     11,857
  Four Years Later......    18,915     23,007     37,758     42,135     23,255     17,777     19,263
  Five Years Later......    22,329     28,609     38,798     41,835     22,047     18,276
  Six Years Later.......    26,129     31,715     37,585     42,943     23,104
  Seven Years Later.....    27,645     31,247     42,260     42,363
  Eight Years Later.....    27,791     37,394     40,796
  Nine Years Later......    27,780     41,325
  Ten Years Later.......    29,163
Gross Reserve -- December 31.............................................................   $ 54,898   $ 36,410
Reinsurance Recoverables.................................................................     (8,379)    (8,777)
                                                                                            --------   --------
Net Reserve -- December 31...............................................................   $ 46,519   $ 27,633
                                                                                            ========   ========
Gross Re-estimated Reserve...............................................................   $ 82,026   $ 60,849
Re-estimated Reinsurance Recoverables....................................................     21,249     18,210
                                                                                            --------   --------
Net Re-estimated Reserve.................................................................   $ 60,777   $ 42,639
                                                                                            ========   ========
Net Cumulative (Deficiency)..............................................................   $(14,258)  $(15,006)
                                                                                            ========   ========
 
<CAPTION>
                            YEAR ENDED DECEMBER 31,
                          ----------------------------
                            1995      1996      1997
                          --------   -------   -------
                                 (IN THOUSANDS)
<S>                       <C>        <C>       <C>
Reserve for Direct
  Unpaid Claim and Claim
  Adjustment Expenses,
  Gross of Reinsurance
  Recoverables
  Reserve...............  $ 40,526   $25,466   $18,686
Re-estimated as of:
  One Year Later........    41,293    30,693
  Two Years Later.......    46,520
  Three Years Later.....
  Four Years Later......
  Five Years Later......
  Six Years Later.......
  Seven Years Later.....
  Eight Years Later.....
  Nine Years Later......
  Ten Years Later.......
Cumulative
  (Deficiency)..........    (5,994)   (5,227)
Cumulative Amount of
  Reserve Paid Through
  One Year Later........  $ 15,827   $10,717
  Two Years Later.......    10,717
  Three Years Later.....
  Four Years Later......
  Five Years Later......
  Six Years Later.......
  Seven Years Later.....
  Eight Years Later.....
  Nine Years Later......
  Ten Years Later.......
Gross Reserve -- December 31.............................................................  $ 40,526   $25,466   $18,686
Reinsurance Recoverables.................................................................    (9,159)   (6,976)   (5,216)
                                                                                           --------   -------   -------
Net Reserve -- December 31...............................................................  $ 31,367   $18,490   $13,470
                                                                                           ========   =======   =======
Gross Re-estimated Reserve...............................................................  $ 46,520   $30,693
Re-estimated Reinsurance Recoverables....................................................    15,153    12,203
                                                                                           --------   -------
Net Re-estimated Reserve.................................................................  $ 31,367   $18,490
                                                                                           ========   =======
Net Cumulative (Deficiency)..............................................................  $     --   $    --
                                                                                           ========   =======














</TABLE>
 
     The first line of the preceding table depicts the estimated liability for
unpaid claim and claim adjustment expense for discontinued operations recorded
for each of the indicated periods. The table follows the form of the table
depicting workers' compensation reserve development in "Analysis of Direct Claim
and Claim Adjustment Expense Development," above.
 
                                       76
<PAGE>   79
 
     From 1987 to 1990, the increase in ultimate claim and claim adjustment
expense for discontinued operations was due to the lack of Company history, as
well as changes in economic and legal environments that prevented management
from reasonably estimating ultimate loss costs. Thereafter, a full actuarial
analysis has been performed semi-annually taking into account the Company's
history of reserve development, industry claim experience, and the effects of
litigation on future loss costs.
 
     The predominant number of the Company's pre-1991 discontinued operations
claims are attributable to construction defect claims associated with commercial
package policies sold to general contractors, developers, and artisan
contractors underwritten from 1986 to 1993. Other carriers writing these same
lines of business have also been negatively affected by the unfavorable increase
in claim frequency and severity that occurred as a result of changes in the
economic and legal environment during this time. At December 31, 1997,
approximately $16.8 million (approximately 90%) of the total $18.7 million of
direct reserves for discontinued operations was attributable to construction
defect claims.
 
     The Company began to monitor separately the effects of construction defect
claims beginning in 1993. Prior to 1993 the effects of construction defect
claims were combined with all other general liability business for reserve
valuation purposes. The frequency, severity, and time lag between the occurrence
and reporting dates of such claims vary significantly from the statistics
associated with all other lines and sublines of the Company's claim and claim
adjustment expense reserves for discontinued operations. Effective June 30,
1995, the Company recorded a pre-tax charge of approximately $15.0 million ($9.8
million net of tax) for discontinued P&C operations due principally to an
increase in management's estimates of IBNR construction defect claims.
 
     The frequency of newly reported construction defect claims increased
significantly in July 1995. Management believes the increase in new construction
defect claims was attributable to the California Supreme Court decision in
Montrose Chemical Corporation v. Admiral Insurance Company ("Montrose") handed
down in July 1995. The Montrose decision effectively broadened the definition of
"loss occurrence" to potentially include an extended period of time beginning
with the construction date and ending perhaps as late as the date of judgment
associated with defective construction. Since July 1995 the Company has received
notices of claims on allegedly defective construction projects where the
manifestation of the loss, the immediate cause of the loss, and the first report
of the loss, all fall outside of the Company's policy terms. Regardless of these
facts, under the California Supreme Court's ruling, the Company believes it is
compelled to defend the "insured" and to contribute appropriately to loss
settlements.
 
     Management cannot predict the volume of future Montrose-related claims, the
cost of handling the claims, or the ultimate severity of loss associated with
such claims, but believes its current reserves are adequate to cover this
increase in claims activity, depending on the length of time the recent
reporting trends continue. There can be no assurance, however, that further
upward development of ultimate loss costs associated with construction defect
claims will not occur.
 
     The Company has also experienced significant development with respect to
loss costs for components of discontinued operations other than construction
defect claims. While these other claims are generally more predictable than
construction defect claims, there can be no assurance that further upward
development of loss costs associated with such claims will not occur.
 
REINSURANCE
 
     Reinsurance is generally used to reduce the liability on individual risks
and to protect against individual risks or aggregate catastrophic losses.
Superior Pacific follows the industry practice of reinsuring a portion of its
risks. The availability and cost of reinsurance are subject to prevailing market
conditions and may affect Superior Pacific's profitability. Superior Pacific's
reinsurance program is based on the security of the reinsurers, coverage, and
price. Superior Pacific monitors its reinsurers' financial condition carefully
and recoverable losses are pursued aggressively. Occasionally, Superior Pacific
is involved in disputes with reinsurers, which, if not settled, may be resolved
in arbitration. At December 31, 1997, there were no disputes related to the
workers' compensation operations.
 
                                       77
<PAGE>   80
 
     Superior Pacific maintains excess of loss reinsurance contracts with
various reinsurers and a quota-share contract with ZRNA. Under its current
excess of loss contracts (with multiple reinsurers), various reinsurers
collectively assume liability on that portion of each loss that exceeds $500,000
on a per occurrence basis, up to a maximum of $150.0 million per occurrence.
 
     Effective January 1, 1994, SNIC entered into a quota-share reinsurance
contract (the "ZRNA Quota-Share") with ZRNA. Under the ZRNA Quota-Share, ZRNA
may provide Superior Pacific with an Assumption of Liability Endorsement ("ALE")
facility, or, effective January 1, 1997, Superior Pacific may write directly on
policy forms of ZC Insurance Company ("ZCIC"), an affiliate of Zurich (the "ZCIC
Underwriting Agreement"). The ceding rate under the contract was 20% for 1994,
and ZRNA and Superior Pacific mutually agreed to reduce the quota-share
participation to 5% for 1995 and 1996. Further, Superior Pacific received ceding
commissions ranging between 22.5% and 24.5% for premiums ceded to ZRNA under the
1994-1997 contracts. The purpose of the ceding commission is to cover Superior
Pacific's cost of acquiring new business and may be changed as a result of
changes in market conditions on a quarterly basis.
 
     Effective January 1, 1997, the terms of the ZRNA Quota-Share were amended
to increase ZRNA's participation from 5% of premiums written in 1996 to 6.5% in
1997. In exchange for the increased participation, ZRNA no longer received a
separate fee for policies written on ALEs, but received an additional 2% of
premiums written on ZCIC Underwriting Agreement policies only.
 
     Effective January 1, 1998, the terms of the ZRNA Quota-Share again were
amended to increase the ceding commission to 27.5% for non-ZCIC policies and on
ALE premium. The ceding commission on ZCIC policies remained at 20%. Further,
the additional 2% of premium paid to ZCIC for its underwriting was eliminated.
 
     Superior Pacific entered into a contract with Centre Re effective June 30,
1997, under which Centre Re assumed $10.0 million of reserves associated with
claims open for future medical payments from Superior Pacific in consideration
of $1.0 million in cash and assignment of of Superior Pacific's rights of
contribution and subrogation recoveries during the term of the contract. The
contract is accounted for as a deposit, and no gain will be recognized until net
cash payments from Centre Re are greater than Superior Pacific's $1.0 million
premium. See "Superior National -- Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Liquidity and Capital
Resources."
 
     Effective February 1, 1998, Superior Pacific entered into the unrelated
Quota-Share Arrangement with United States Life Insurance Company, rated "A+" by
A.M. Best, under which Superior Pacific ceded 100% of premiums and claim and
claim adjustment expenses associated with policies having $100,000 or more of
estimated annual premium. Superior Pacific received a 35.0% ceding commission on
premiums ceded under this contract. Effective May 1, 1998, the Quota-Share
Arrangement was amended so that the ceding level was reduced to $25,000 in
estimated annual premium at inception, and the ceding commission was adjusted to
33.5%. The term of the amended agreement is three years, with two one-year
extensions. As BlG has entered into a substantially identical Quota-Share
Arrangement with the same reinsurer, this contract plays an important role in
the Company's strategy going forward.
 
     Reinsurance makes the assuming reinsurer liable to the insurer to the
extent of the reinsurance ceded, but it generally does not legally discharge an
insurer of its primary liability for the full amount of the policy liability
(except for ALEs). If a reinsurer fails to meet its obligations under a
reinsurance agreement, the ceding company is required to pay the loss. With
respect to policies of Superior Pacific's with an ALE, however, in the event
that Superior Pacific is unable to meet its claim payment obligations, ZRNA
assumes all responsibility for the payment of losses related to the policy. All
of the excess of loss reinsurance is with non-affiliated reinsurers.
 
     Superior Pacific generally enters into its contracts on an annual basis.
Superior Pacific has maintained reinsurance contracts with many reinsurers for a
number of years. In general, Superior Pacific's reinsurance contracts cover
specified underwritten risks. Superior Pacific also from time to time purchases
reinsurance covering specific liabilities or policies underwritten. As of
December 31, 1997, ZRNA and General Reinsurance Corporation ("Gen Re") accounted
for 24.5% and 21.6%, respectively, of total amounts
 
                                       78
<PAGE>   81
 
recoverable by Superior Pacific from all reinsurers on paid and unpaid claims
and claim adjustment expenses, and were the only reinsurers that accounted for
more than 10% of such amounts.
 
INVESTMENTS
 
     The amount and types of investments that may be made by the Company are
regulated under the California Insurance Code and the rules and regulations
promulgated by the DOI. The Company's investments are primarily managed
externally, based upon guidelines and strategies approved by management. As of
December 31, 1997, the Company's consolidated portfolio consisted almost
entirely of fixed-income securities. The bond portfolio is heavily weighted
toward short- to intermediate-term, investment-grade securities rated "A" or
better, with approximately 91% rated "AA" or better.
 
     Funds withheld assets having carrying and market values of $114.9 million
and $117.1 million, respectively, at December 31, 1995, were withheld from
Centre Re as collateral under an excess of loss reinsurance contract. These
assets were carried as held to maturity until they were returned to Centre Re in
1996 upon the commutation of the reinsurance contract. All investment income and
market value risk associated with these assets was assumed by Centre Re.
Interest expense in the amount of $6.1 million and $8.8 million was paid to
Centre Re during 1996 and 1995, respectively. In November 1996, the Company
entered into a financing transaction involving Centre Re and Chase pursuant to
which Chase extended a $93.1 million term loan, net of transaction costs. The
Company used proceeds from the transaction to purchase from SNIC reinsurance
receivables due from Centre Re. On June 30, 1997, the Company reached an
agreement under which the Company agreed to transfer reinsurance receivables to
Chase in exchange for the cancellation of the Company's debt to Chase. As a
result of these transactions, the Company's investable assets increased by $93.1
million.
 
     The table below contains information concerning the composition of the
Company's investment portfolio at December 31, 1997:
 
<TABLE>
<CAPTION>
                                                                AS OF
                                                          DECEMBER 31, 1997
                                                        ----------------------
                                                         CARRYING      MARKET
                                                        AMOUNT (1)     VALUE
                  TYPE OF INVESTMENT                    ----------    --------
                                                            (IN THOUSANDS)
<S>                                                     <C>           <C>
Bonds: (2)
U.S. government and agencies (AAA/Aaa rated)..........   $165,273     $165,273
AA/Aa rated...........................................     21,127       21,127
A rated...............................................     12,584       12,584
BBB/Baa rated.........................................      2,150        2,150
BB/Ba rated...........................................      4,080        4,080
                                                         --------     --------
          Total Bonds.................................    205,214      205,214
Invested cash and short-term investments..............     35,376       35,376
Common stocks.........................................      1,526        1,526
                                                         --------     --------
          Total.......................................   $242,116     $242,116
                                                         ========     ========
</TABLE>
 
- ------------------------------
(1) Carrying amount is amortized cost for bonds held to maturity and short-term
    investments. Market value is used for bonds held for sale and common stocks.
 
(2) S&P defines "AAA" rated securities as "highest rating, extremely strong
    security," "AA" rated securities as "very strong security," "A" as "strong
    security," "BBB" as "adequate security," and "BB" as "low quality." Moody's
    Investor Services, Inc. ("Moody's") defines "Aaa" rated securities as "best
    quality," "Aa" as "high quality," "A" as "strong security," "Baa" as
    "adequate security," and "Ba" as "low quality."
 
                                       79
<PAGE>   82
 
     The table below reflects investments and interest earned thereon and
average annual yield on investments for each year in the five-year period ended
December 31, 1997.
 
<TABLE>
<CAPTION>
                                                        YEAR ENDED DECEMBER 31,
                                          ----------------------------------------------------
                                            1997       1996       1995       1994       1993
                                          --------   --------   --------   --------   --------
                                                             (IN THOUSANDS)
<S>                                       <C>        <C>        <C>        <C>        <C>
Total investments at end of period......  $242,116   $149,440   $163,951   $174,345   $144,778
Net investment income (before taxes)....  $ 12,674   $  7,769   $  9,784   $  9,049   $  9,550
Average annual yield on ending
  investment portfolio (before taxes)...      5.2%       5.2%       5.9%       5.2%       6.6%
</TABLE>
 
     The Company in monitoring its asset and liability match attempts to keep
the investment duration at the mid-point of the payout pattern. As of December
31, 1997, the investments under the Company's management (i.e., excluding funds
withheld) have a duration of 2.9 years.
 
     The table below sets forth the maturity profile of the Company's bond
portfolio at market value as of December 31, 1997:
 
<TABLE>
<CAPTION>
                                                     AS OF DECEMBER 31, 1997
                                    ----------------------------------------------------------
                                                          BONDS RATED(1)
                                    ----------------------------------------------------------
                                    AAA/AAA     AA/AA       A      BBB/BAA   BB/BA     TOTAL
                                    --------   -------   -------   -------   ------   --------
                                                          (IN THOUSANDS)
<S>                                 <C>        <C>       <C>       <C>       <C>      <C>
1 year or less....................  $ 25,086                                          $ 25,086
More than 1 year, through 3
  years...........................     9,038             $ 5,544                        14,582
More than 3 years, through 5
  years...........................    11,988   $15,120     3,020                        30,128
More than 5 years, through 10
  years...........................    26,519     6,007     4,020   $2,150    $4,080     42,776
More than 10 years, through 15
  years...........................     2,866                                             2,866
More than 15 years................    89,776                                            89,776
                                    --------   -------   -------   ------    ------   --------
          Total...................  $165,273   $21,127   $12,584   $2,150    $4,080   $205,214
                                    ========   =======   =======   ======    ======   ========
</TABLE>
 
- ------------------------------
(1) S&P defines "AAA" rated securities as "highest rating, extremely strong
    security," "AA" rated securities as "very strong security," "A" as "strong
    security," "BBB" as "adequate security," and "BB" as "low quality." Moody's
    defines "Aaa" rated securities as "best quality," "Aa" as "high quality,"
    "A" as "strong security," "Baa" as "adequate security," and "Ba" as "low
    quality."
 
     The Company intends to cause BIG to liquidate its investment portfolio
immediately prior to Closing. The bulk of the investable assets obtained as a
result of the Acquisition will be invested in accordance with the Company's
existing investment policies. The Company also intends to purchase a $110.0
million Federal National Mortgage Association security maturing in 2013. Such a
security would have a high investment grade rating, a higher yield coupon than
the Company's portfolio generally, and an approximately ten-year duration.
 
INFORMATION SERVICES
 
     Superior Pacific emphasizes the development of personal computer based
information and processing systems for use in all areas of its business and to
that end strives to maintain a creative, flexible, and dynamic data processing
capability that (i) enhances the effectiveness of its employees' underwriting,
policy administration, and claims activities, (ii) provides detailed, real-time,
and near real-time information to management for control and administration
purposes, and (iii) provides marketing benefits through improved customer
service. The Company believes that these systems give it a significant
competitive advantage over competitors that lack such systems. Superior Pacific
expensed or capitalized 3.7%, 4.2%, and 3.3% of direct written premium in 1997,
1996, 1995, respectively, for developing and upgrading its systems.
 
     Data Warehouse Decision Support System. In 1993 the Company developed
SWAMI(R), its proprietary "data warehouse decision support" system. Beginning
with the installation of SWAMI(R), Superior Pacific adjusted the Company's
monitor and feedback cycle to no less frequently than weekly, and, in many
respects,
 
                                       80
<PAGE>   83
 
to a daily basis. Management believes this monitoring and feedback system is
necessary due to the information intensive nature of the insurance business
because lack of information represents a major aspect of underwriting risk.
Accordingly, SWAMI(R) was developed to provide quality, detailed, real-time, and
near real-time information to management as needed to reduce the risk
represented by lack of information. The SWAMI(R) system has been constantly
enhanced since its implementation. Management believes that SWAMI(R) is the
first comprehensive "data warehouse decision support" system developed in the
insurance industry.
 
     Underwriting. The Company's underwriting system is a fully integrated,
computerized, rating, quoting, and policy issuance system for use both
internally and remotely from producers' offices. The system contains edit and
blocking features that prohibit underwriters from issuing policies associated
with business that is deemed inappropriate or undesirable by management, or that
may be inappropriately priced. Detailed information for each producer can be
instantaneously reviewed on an accident year, policy year, or calendar year
basis. The system provides analytical information as to producers, underwriters,
or branch operations, which management uses to take corrective action with
respect to unprofitable producers or ineffective staff. The system permits
management to evaluate commissions, in force business, collections activity, and
product pricing in detail, utilizing information that is no more than 24 hours
old.
 
     Policy Administration. The Company's policy administration, including
premium collection and audit activities, is fully automated. In addition to
traditional "agency" billing services, the Company's collections capabilities
also include direct bill, automatic withdrawals from policyholders' bank
accounts, and credit card billings, which, management believes, dramatically
improve credit experience and policy persistency.
 
     Claims Administration. The core of the claims system is a proprietary
document imaging system that, combined with sophisticated workflow protocols,
improves the productivity of the Company's claims staff.
 
     The Company has comprehensive physical and virtual safeguards for its
information and processing systems. Disaster recovery programs and back-up
procedures include nightly back-up storage of all transactions and changes to
the system's database. At the end of each business day, the Company transfers
this information to tapes that are stored off site. The Company maintains
back-up systems in the branch offices to use if the main system fails. Computer
access is restricted by use of codes and passwords.
 
     The Company does not believe that it will incur any material expenditures
or liabilities as a result of the Year 2000 problem in computer software. See
"Superior National -- Management's Discussion and Analysis of Financial
Condition and Results of Operations -- Year 2000 Strategy."
 
     The Company is developing a strategy to integrate BIG's policy and claims
functions into its system over time. The integration of policy functions would
be the first step, and could occur as new or renewal policies are issued after
the Acquisition. The claims functions of Superior Pacific and BIG would be
separate for some time.
 
COMPETITION
 
     California is the country's largest workers' compensation insurance market.
Competitive pressures in the California workers' compensation market increased
with the implementation of open rating in January 1995. As a result, total
direct written premium for the California market decreased from $9.0 billion in
1993 to $5.0 billion in 1996, the latest year for which data is available. More
recently, certain fundamentals of the workers' compensation market in California
have improved, as demonstrated by an actual improvement in premium pricing of
0.5% for the year ended December 31, 1997, as compared to the same period in
1996.
 
     The workers' compensation insurance industry in California is extremely
competitive. Many of Superior Pacific's competitors have been in business
longer, have a larger volume of business, offer more diversified types of
insurance coverage, have greater financial resources, and have greater
distribution capabilities than Superior Pacific. Of the approximately 300
companies that report to the WCIRB that they write workers' compensation
insurance, the Company believes that Liberty Mutual Insurance Companies,
CalComp, and American International Group are the largest private sector
underwriters of workers' compensation insurance in California. Superior Pacific
believes the dominant competitor in the California workers' compensation
                                       81
<PAGE>   84
 
industry is the State Fund. As a result of the Pac Rim Transaction, the Company
believes that, excluding the State Fund, it is the eighth largest California
workers' compensation insurer overall, based upon 1996 direct written premium.
On a pro forma basis, upon acquiring CalComp in the Acquisition, as well as the
other BIG Insurance Subsidiaries, the Company believes it will be the largest
California workers' compensation insurer overall, excluding the State Fund.
 
     The workers' compensation market is commodity-oriented, highly fragmented,
and reflective of intense price competition. Nevertheless, because each risk is
unique in terms of insurance exposure, different insurers can develop widely
divergent estimates of prospective losses. Most insurers attempt to segment
classes within markets so that they target the more profitable sub-classes with
lower, although adequate, rates given the estimated profitability of the
segment. In some cases, no statistics are available for the sub-classes
involved, and the insurer implements discounted rate structures based solely on
theoretical judgment. Finally, different insurers have widely divergent internal
expense positions, due to distribution methods, economies of scale, and
efficiency of operations. Therefore, although workers' compensation insurance is
a commodity, the price of insurance does not necessarily reflect commodity
pricing. Superior Pacific's existing and prospective customer bases are
vulnerable to competition, especially from larger insurers that at any time are
capable of penetrating Superior Pacific's markets with products priced at levels
substantially below Superior Pacific's.
 
RATINGS
 
     Superior Pacific is currently rated "BBB" by S&P, a claims paying rating it
has held since 1995. Insurance companies rated "BBB" are considered by S&P to
offer adequate financial security, but capacity to meet policyholder obligations
is susceptible to adverse economic and underwriting conditions. A.M. Best has
currently assigned a "B+" (Very Good) rating to Superior Pacific, a rating it
has held since 1995. A.M. Best has placed the Company's rating on a watch with
positive implications. A.M. Best's ratings are based upon an evaluation of a
company's: (i) financial strength (leverage/capitalization, capital
structure/holding company, quality, appropriateness of reinsurance program,
adequacy of loss/policy reserves, quality, diversification of assets, and
liquidity); (ii) operating performance (profitability, revenue composition, and
management experience and objectives); and (iii) market profile (market risk,
competitive market position, spread of risk, and event risk). A "B+" rating is
assigned to companies that have on balance, in A.M. Best's opinion, very good
financial strength, operating performance, and market profile when compared to
the standards established by A.M. Best, and have a good ability to meet their
ongoing obligations to policyholders. "B+" is A.M. Best's sixth highest rating
classification out of 15 ratings. A.M. Best's and S&P's ratings represent
independent opinions of a company's financial strength and ability to meet its
obligations to policyholders and are not based upon factors concerning
investors. Such ratings are subject to change and are not recommendations to
buy, sell, or hold securities. One factor in an insurer's ability to compete
effectively is its A.M. Best rating. The Company's A.M. Best rating is lower
than that of many of its competitors. There can be no assurance that such
ratings or future changes therein will not affect the Company's competitive
position.
 
     In addition, the Company currently maintains a facility that allows it to
offer certain policyholders insurance policies written by ZCIC, having an A.M.
Best "A" rating. As a result of the planned sale of BICO to Zurich Centre Group
LLC, and an underwriting arrangement created in connection therewith, the
Company expects to have the ability to offer certain policyholders policies with
Zurich's "A" rating.
 
REGULATION
 
     Superior National and its insurance subsidiaries are subject to extensive
governmental regulation and supervision. Regulations relate to such matters as
the filing of premium rates and policy forms, adequacy of reserves, types and
quality of investments, minimum capital and surplus requirements, deposits of
securities for the protection of policyholders, statutory financial reporting,
and restrictions on stockholder dividends. Superior National and its insurance
subsidiaries are also subject to periodic examination by the DOI. In addition,
assessments are made against Superior Pacific and other California insurers to
cover liabilities to policyholders of insolvent insurance companies. The
regulation and supervision of insurance companies by state agencies is designed
only for the benefit of policyholders, not stockholders. Superior National
believes
 
                                       82
<PAGE>   85
 
that it and its Subsidiaries are in material compliance with state regulatory
requirements that are relevant to their respective businesses.
 
     The DOI Triennial Examination of SNIC, which covered the three years ended
December 31, 1994, was completed in 1996 and indicated no material issues or
actions needed to be taken by SNIC in either its operations or financial
statements. SPCC's Triennial Examination, which was completed in 1996, resulted
in an additional $18.5 million of claim and claim adjustment expense reserves
being recorded as of December 31, 1996, and other significant adjustments
totalling $4.1 million in aggregate. An additional $12.0 million in claim and
claim adjustment expense was recorded by SPCC in the first quarter of 1997.
These events preceded SPCC's acquisition on April 11, 1997.
 
     The California Insurance Code requires the DOI to approve any proposed
change of control of the Company. For such purposes, "control" is presumed to
exist if any person, directly or indirectly, owns, controls, holds with the
power to vote, or holds proxies representing more than 10% of the voting
securities of the Company.
 
     The California Insurance Code also limits the amount of dividends or
distributions an insurance subsidiary may pay without DOI approval or
non-disapproval in any 12-month period to the extent it exceeds the greater of
(a) net income from operations for the preceding year or (b) 10% of statutory
policyholders' surplus as of the preceding December 31. Payments of greater
amounts require the approval of the DOI. The maximum dividends permitted under
the California Insurance Code are not necessarily indicative of an insurer's
actual ability to pay dividends or other distributions to a parent company,
which also may be constrained by business and regulatory considerations, such as
the impact of dividends on surplus, that could affect an insurer's competitive
position, the amount of premiums that can be written, and the ability to pay
future dividends. Further, the California Insurance Code requires that the
statutory surplus of an insurance company following any dividend or distribution
by such company be reasonable in relation to its outstanding liabilities and
adequate for its financial needs. Moreover, dividends may only be paid out of
"earned surplus" as defined in the California Insurance Code. New York and
Delaware, the respective domiciles of CCIC and BICO, also limit the amount of
dividends that may be paid by an insurance subsidiary.
 
     In 1989, 1991, 1993, and 1995, various workers' compensation reform laws
that were passed into law by the California legislature materially impacted the
Company's rates, claims experience, financial condition, and results of
operations.
 
     Under the last important measure, adopted in 1993 and declared effective as
of January 1995, California's minimum rate law was replaced by an open rating
system. Under this new rating system, individual insurance companies file rates
and rules not less than 30 days prior to their effective date, and such rates
and rules can only be disapproved by the DOI after a hearing and only on the
basis of solvency, market share, or improper filing. Superior Pacific cannot
predict the ultimate effect of open rating on its workers' compensation
business, but during the first three years of open rating, the intense price
competition that ensued led to lower average premiums per policy. Rates
stabilized in 1996 and appeared to increase slightly during 1997. Superior
Pacific believes the rates it has filed with the DOI are adequate, but it is
unable to predict the degree to which such rates are competitive in the
marketplace.
 
     In 1996, the California legislature implemented a set of workers'
compensation reforms, referred to as Assembly Bill 1913 ("AB 1913"), and the DOI
issued its guidelines with respect to their interpretation. AB 1913 causes,
among other things, the experience modification factor of a current workers'
compensation policy and the immediately preceding two policies regardless of
carrier to be subject to revision if a single claim used in a modification
closes on or after January 1, 1995, for a value of 60% or less of its highest
earlier reported value, if the highest reported incurred value was $10,000 or
more. AB 1913 was amended effective January 1, 1998 by Senate bill 1217 ("SB
1217"). Under the new guidelines of SB 1217, if the aggregate amount of incurred
claims (as opposed to a single claim) changes by the threshold amount, than the
WCIRB will calculate a new experience modification factor. Such a change in the
experience modification factor will require the current workers' compensation
carrier to return a portion of a policyholder's premium for the current and
preceding two policies' periods without regard to whether the current workers'
compensation insurance carrier was the insured's previous carrier. WCIRB
estimates the ultimate cost to California workers'
                                       83
<PAGE>   86
 
compensation underwriters will be less than 2.5% of 1996 premium; however, these
estimates are based upon broad industry estimates and could vary significantly
from company to company based upon the type of claims incurred, size of
employer, and employer industry group.
 
     Proposed federal legislation has been introduced from time to time in
recent years that would provide the federal government with substantial power to
regulate P&C insurers, including state workers' compensation systems, primarily
through the establishment of uniform solvency standards. Proposals also have
been discussed to modify or repeal the antitrust exemption for insurance
companies provided by the McCarran-Ferguson Act. The adoption of such proposals
could have a material adverse impact upon the operations of the Company.
 
     In order to enhance the regulation of insurer solvency, the NAIC has
adopted a formula and model law to implement risk-based capital ("RBC")
requirements for P&C (including workers' compensation) insurance companies
designed to assess minimum capital requirements and to raise the level of
protection that statutory surplus provides for policyholder obligations. The
NAIC model law has been incorporated into the California Insurance Code. The RBC
formula for P&C insurance companies measures four major areas of risk: (i)
underwriting, which encompasses the risk of adverse loss developments and
inadequate pricing, (ii) declines in asset values arising from credit risk,
(iii) declines in asset values arising from investment risks, and (iv)
off-balance sheet risk arising from adverse experience from non-controlled
assets, guarantees for affiliates, contingent liabilities, and reserve and
premium growth. Pursuant to the model law, insurers having less statutory
surplus than that required by the RBC calculation will be subject to varying
degrees of regulatory action, depending on the level of capital inadequacy.
 
     The RBC model law provides for four levels of regulatory action. The extent
of regulatory intervention and action increases as the level of surplus as a
percentage of the RBC amount falls. The first level, the Company Action Level
(as defined by the NAIC), requires an insurer to submit a plan of corrective
actions to the regulator if surplus falls below 200% of the RBC amount. The
Regulatory Action Level (as defined by the NAIC) requires an insurer to submit a
plan containing corrective actions and requires the relevant insurance
commissioner to perform an examination or other analysis and issue a corrective
order if surplus falls below 150% of the RBC amount. The Authorized Control
Level (as defined by the NAIC) gives the relevant insurance commissioner the
option either to take the aforementioned actions or to rehabilitate or liquidate
the insurer if surplus falls below 100% of the RBC amount. The fourth action
level is the Mandatory Control Level (as defined by the NAIC), which requires
the relevant insurance commissioner to rehabilitate or liquidate the insurer if
surplus falls below 70% of the RBC amount. Based on the foregoing formulae, as
of December 31, 1997, the RBC ratios of SNIC and SPCC were in excess of the
Company Action Level, the first trigger level that would require regulatory
action.
 
     The NAIC's Insurance Regulatory Information System ("IRIS") was developed
by a committee of state insurance regulators and is primarily intended to assist
state insurance departments in executing their statutory mandates to oversee the
financial condition of insurance companies operating in their respective states.
IRIS identifies eleven industry ratios and specifies "usual values" for each
ratio. Departure from the usual values on four or more of the ratios may lead to
increased regulatory oversight. Based on its 1997 statutory financial statement,
SNIC was within the usual range of all twelve IRIS tests, and SPCC fell outside
the usual range of three of the twelve IRIS tests. SPCC was outside of the usual
range of the tests measuring change in net writings, two-year overall operating
ratio, and two-year reserve development to surplus. The unusual values were the
result of 1996 claim and claim adjustment expense reserve increases, and the
runoff of SPCC's premium in force during 1997.
 
     The financial statements contained herein have been prepared in conformity
with GAAP, as opposed to SAP prescribed or permitted for insurance companies by
regulatory authorities. SAP differs from GAAP principally in the following
respects: (a) premium income is taken into operations over the periods covered
by the policies, whereas the related acquisition and commission costs are
expensed when incurred; (b) deferred income taxes are not recognized under SAP;
(c) certain assets such as agent's balances over ninety days due and prepaid
expenses are nonadmitted assets for statutory reporting purposes; (d)
policyholder dividends are accrued when declared; (e) the cash flow statement is
not consistent with classifications and the presentation
 
                                       84
<PAGE>   87
 
under GAAP; (f) bonds are recorded at amortized cost, regardless of trading
activities; (g) loss and loss adjustment expense reserves and unearned premium
reserves are stated net of reinsurance; and (h) minimum statutory reserves for
losses in excess of the Company's estimates are required.
 
     The NAIC recently approved the codification of SAP with an effective date
of January 1, 2001. Included in the codification is a change in the definition
of prescribed versus permitted policies that insurance companies use to prepare
their statutory financial statements. The Company has not yet determined the
impact of the adoption of the codification project.
 
     Although the Company has not received any claims made under policies
written in its P&C insurance business (discontinued in 1993) related to business
losses caused by Year 2000 malfunctions or costs incurred in connection with
prevention or correction of Year 2000 problems, it is conceivable that such
claims could be made. Published estimates of Year 2000 business losses and costs
are in the many billions of dollars. If P&C insurers were required by court
decision to pay claims on policies issued between 1985 and 1993 related to Year
2000 losses the Company may have to pay such claims. In such event, the Company
would likely have inadequate reserves in its discontinued operations and the
booking of additional reserves would have a material adverse effect on the
Company's results of operations.
 
     It is not possible to predict the future impact of changing state and
federal regulation on the Company's operations and there can be no assurance
that laws and regulations enacted in the future will not be more restrictive
than existing laws.
 
EMPLOYEES
 
     As of June 1, 1998, the Company had 262 employees, none of whom was covered
by a collective bargaining agreement.
 
BUSINESS PROPERTIES
 
     The Company's principal executive offices are located in Calabasas,
California and are subject to a lease that expires in 2000. The Company also
leases space for branch offices in Woodland Hills, Pleasanton, Sacramento, and
Fresno (all in California). Such leases expire in 2002, 2003, 2001, and 2000,
respectively. The Company's Phoenix, Arizona office is the subject of a lease
that expires in 2001.
 
     The Company's principal executive office is located at 26601 Agoura Road,
Calabasas, California 91302, and the telephone number is (818) 880-1600.
 
LEGAL PROCEEDINGS
 
     Superior National and its Subsidiaries are parties to various legal
proceedings, all of which are considered routine and incidental to the business
of the Company and are not material to the financial condition and operation of
the business. Neither Superior National nor any of its Subsidiaries is a party
to any litigation expected to have a material adverse effect upon the Company's
business or financial position.
 
     The Company is subject to class action litigation filed against all
workers' compensation insurers in California, related principally to claims
paying practices. Such litigation is being vigorously contested by the Company.
Although the likelihood of a material adverse result in such matters is regarded
by the defendants as low, there can be no assurance that, should a trial be
held, the class plaintiffs will not receive a substantial award.
 
                                       85
<PAGE>   88
 
                               SUPERIOR NATIONAL
                                   MANAGEMENT
 
DIRECTORS
 
     Information is set forth below concerning the directors of the Company and
the year in which each was first elected as a director of the Company.
 
<TABLE>
<CAPTION>
                                                                                         DIRECTOR
          DIRECTORS            AGE               POSITION WITH THE COMPANY                SINCE
- -----------------------------  ---   --------------------------------------------------  --------
<S>                            <C>   <C>                                                 <C>
C. Len Pecchenino(1).........  71    Director, Chairman of the Board                       1988
Steven D. Germain(2).........  45    Director                                              1995
Steven B. Gruber.............  40    Director                                              1997
Thomas J. Jamieson(1)(3).....  55    Director                                              1985
Gordon E. Noble(2)...........  70    Director                                              1990
Craig F. Schwarberg(1)(3)....  42    Director                                              1992
Robert A. Spass..............  42    Director                                              1992
Bradley E. Cooper(2)(3)......  31    Director                                              1992
William Gentz................  57    President, Chief Executive Officer and Director       1994
J. Chris Seaman(3)...........  43    Executive Vice President, Chief Financial Officer     1993
                                     and Director
Roger W. Gilbert.............  66    Director                                              1997
</TABLE>
 
- ------------------------------
(1) Member of Audit Committee
 
(2) Member of Compensation Committee
 
(3) Member of Investment Committee
 
     No arrangement or understanding exists between any nominee and any other
person or persons pursuant to which any nominee was or is to be selected as a
director or nominee, except that IP Delaware and IP Bermuda nominated Steven B.
Gruber to the Board of Directors in April 1997, pursuant to the terms of the
Stock Purchase Agreement dated September 17, 1996, as amended and restated
February 17, 1997, among IP Delaware, IP Bermuda, TJS, and members of management
(the "1996 Stock Purchase Agreement"). Under the 1996 Stock Purchase Agreement,
which will be reaffirmed upon the consummation of the Equity Financings, IP and
its Associates (as defined below) have agreed that they will nominate no more
than five directors to the eleven-member Board.
 
     C. Len Pecchenino became a director of the Company in May 1988 and was
elected as Chairman in June 1994. He served as the Company's Chief Executive
Officer from September 1991 to February 1992 and as the President and Chief
Executive Officer from February 1994 to May 1994. He also served as the Chairman
from September 1991 to August 1992. Until his retirement in 1986, Mr. Pecchenino
held various executive officer positions, including President and Chief
Operating Officer, with IC Industries, Inc. and Pneumo Corporation.
 
     Steven D. Germain was elected to the Board of Directors in April 1995. From
1988 to 1994 he served as General Counsel to the Centre Reinsurance Group of
Companies. Since 1994 he has served as General Counsel of Zurich Centre Group
L.L.C., a company that provides management services to the Centre Reinsurance
Group of Companies. Mr. Germain continues to serve as a Senior Vice President,
General Counsel and Secretary to Centre Re and as a director, Senior Vice
President, General Counsel and Secretary of CentreLine Reinsurance Limited, a
Bermuda corporation ("CentreLine"). Mr. Germain is also a director, President,
and Chief Executive Officer of Home Holdings, Inc. and a director of certain of
its subsidiaries.
 
     Steven B. Gruber became a director of the Company in April 1997. He was a
founder of, and since February 1994, has served as a Managing Partner of,
Insurance Partners Advisors, L.P. ("IPA") From May 1990 to present, Mr. Gruber
has served as a Managing Director of Oak Hill Partners, Inc. and from October
 
                                       86
<PAGE>   89
 
1992 to present, has served as a Vice President of Keystone, Inc. From 1981 to
April 1990 he was associated with Lehman Brothers Inc., most recently as
Managing Director and Co-Head of high-yield securities. From 1994 to 1997, he
served as a director of Unionamerica Holdings plc. From 1990 to 1996, he served
as a director of National Reinsurance Holding, Corp. He is also a director of
Reliant Building Products, Inc., Grove Worldwide L.L.C., and MVE Inc.
 
     Thomas J. Jamieson has been a director of the Company since December 1985.
Since 1971, he has served as President of Jaco Oil Company, and since 1993, he
has been a director of Berry Oil Co.
 
     Gordon E. Noble became a director of the Company in October 1990. Since
July 1990, he has been Chairman and Chief Executive Officer of Commodore
Insurance Services. Previously he served as Executive Vice President and as a
director and member of the Executive Committee of Sedgwick James, an
international insurance brokerage and risk management firm.
 
     Craig F. Schwarberg was appointed to the Board of Directors in March 1992.
From 1991 to 1997, Mr. Schwarberg worked for International Insurance Advisors,
Inc. ("IIA"), serving as a Managing Director through February 1994. From 1994 to
March 1996, Mr. Schwarberg was a director and Chairman of the Board of NACOLAH
Holding Corporation. Prior to 1991, he held various positions at Lehman Brothers
Inc., most recently as Senior Vice President.
 
     Robert A. Spass was appointed to the Board of Directors in March 1992.
Since 1990, Mr. Spass has served as President and Chief Executive Officer, and a
director, of IIA. From 1994 to the present, Mr. Spass has been a Managing
Partner of IPA. Prior to 1990, Mr. Spass held various positions at Salomon
Brothers Inc, most recently as a Director. Since January 1996, he has served as
a director of Highlands Insurance Group, Inc. Since January 1998, he has served
as a director of MMI Companies, Inc. From 1990 to 1996, he served as a director
of National Reinsurance Holdings Corp. From 1994 to 1997, he served as a
director of Unionamerica Holdings plc, and from 1994 to 1996 he served as a
director of NACOLAH Holding Corporation.
 
     Bradley E. Cooper became a director of the Company in May 1992. Currently,
Mr. Cooper is a Partner of IPA, joining at its formation in 1994. From May 1990
to February 1994, Mr. Cooper served as Vice President of IIA. Prior to 1990, Mr.
Cooper was an analyst with Salomon Brothers Inc. Since January 1996, he has
served as a director of Highlands Insurance Group, Inc.
 
     William Gentz became a director of the Company in June 1994. Mr. Gentz has
held the position of President and Chief Executive Officer since mid-1994. Mr.
Gentz joined the Company after seventeen years at Zenith Insurance Company,
where he was responsible for marketing, underwriting, loss control, and field
operations for Zenith's workers' compensation operations. Mr. Gentz began his
insurance career in 1958, and from 1958 to 1968 worked in the marketing and
underwriting departments of a variety of insurance companies in the mid-west and
California.
 
     J. Chris Seaman became a director of the Company in March 1993. Mr. Seaman
has held the positions of Executive Vice President since February 1995 and Chief
Financial Officer since July 1991. Prior to joining the Company, Mr. Seaman was
the Chief Financial Officer of a private company engaged in insurance company
acquisitions following ten years with Ernst & Whinney. Mr. Seaman previously
held staff and management positions at Industrial Indemnity Insurance Company
and Allianz of America Corporation, respectively.
 
     Roger W. Gilbert became a director of the Company in April 1997. From May
1988 until his retirement in June 1993, Mr. Gilbert served simultaneously as the
Chief Executive Officer and Chairman of the Board of TIC Indemnity Co., the
Chief Executive Officer of TMIC Insurance Co. Inc., and a California Special
Deputy Insurance Commissioner, a position to which he was appointed by the
California Insurance Commissioner. Prior to 1988, Mr. Gilbert served as Senior
Vice President and director of Great American Insurance Companies, and as
President of Great America West Inc.
 
                                       87
<PAGE>   90
 
COMMITTEES
 
     The standing committees of the Board of Directors are the Audit Committee,
the Compensation Committee, and the Investment Committee.
 
     The Audit Committee recommends to the Board of Directors the engagement or
discharge of the Company's independent auditors; reviews with the independent
auditors the scope, timing and plan for the annual audit, any non-audit
services, and the fees for audit and other services; reviews outstanding
accounting and auditing issues with the independent auditors; and supervises or
conducts such additional projects as may be relevant to its duties. The Audit
Committee is also responsible for reviewing and making recommendations with
respect to the Company's financial condition, its financial controls, and its
accounting practices and procedures. The Audit Committee, which presently
consists of Messrs. Pecchenino, Jamieson, and Schwarberg, held five meetings
during the fiscal year ended December 31, 1997.
 
     The Compensation Committee reviews and approves the Company's executive
compensation policies and bonus distributions to officers and key employees of
the Company. The Compensation Committee, which during the fiscal year ended
December 31, 1997 held four meetings, consists of Messrs. Noble, Cooper, and
Germain.
 
     The Investment Committee reviews the investment practices of the Company's
primary insurance subsidiaries, SNIC and SPCC, and oversees the relationship
between SNIC and SPCC and their investment manager. It carries out this function
through the fact that its members are the directors of SNIC and SPCC responsible
for the same oversight at SNIC and SPCC. The Investment Committee, which
presently consists of Messrs. Jamieson, Cooper, Seaman, and Schwarberg, held
five meetings during the fiscal year ended December 31, 1997.
 
REMUNERATION
 
     Each director is elected to hold office until the next annual meeting of
stockholders and until his respective successor is elected and qualified. Each
incumbent director who is not an officer of the Company is paid a fee of $4,000
for each regular Board of Directors meeting attended and $500 for each committee
meeting attended. The Board of Directors regularly meets once each quarter. All
directors are reimbursed for their out-of-pocket expenses in serving on the
Board.
 
     In May 1997, the Board of Directors approved the payment to C. Len
Pecchenino, the Chairman of the Board, of $50,000 per year so long as he remains
Chairman of the Board and serves on the Audit Committee. This amount is to be
paid in addition to the fees he normally receives for attendance at regularly
scheduled Board meetings. Mr. Pecchenino was paid $50,000 in September 1997 and
since then he has been paid this amount in four equal quarterly installments.
 
     Messrs. Spass and Cooper are employees of IIA and Mr. Schwarberg is a
former IIA employee. Mr. Spass is also an officer and director of IIA. Mr.
Germain is an officer and director of Centre Re and CentreLine, each of which
are affiliates of Zurich. Messrs. Spass and Gruber are executive officers of IPA
and of the ultimate general partner of each of IP Delaware and IP Bermuda. In
addition, Messrs. Spass and Cooper are officers of the general partner of IP II.
Each of IIA, Centre Re, CentreLine, Zurich, IP Delaware, IP Bermuda, IP II, IPA,
and Capital Z are parties to transactions with the Company described in "Certain
Relationships and Related Transactions." Additionally, Mr. Gentz and Mr. Seaman
have participated in transactions pursuant to which they acquired or are
acquiring Common Stock and/or warrants issued by the Company. See "Certain
Relationships and Related Transactions."
 
                                       88
<PAGE>   91
 
EXECUTIVE OFFICERS AND EXECUTIVE COMPENSATION
 
  Executive Officers
 
     Set forth in the table below are the names, ages, and current offices held
by all executive officers of the Company and Superior Pacific. Unless
specifically noted, the positions named are held at both the Company and at
Superior Pacific.
 
<TABLE>
<CAPTION>
                                                                                         EXECUTIVE
                                                                                          OFFICER
          NAME            AGE                  POSITION WITH THE COMPANY                   SINCE
          ----            ---                  -------------------------                 ---------
<S>                       <C>   <C>                                                      <C>
William L. Gentz          57    President and Chief Executive Officer                      1994
J. Chris Seaman           43    Executive Vice President and Chief Financial Officer       1991
Arnold J. Senter          56    Executive Vice President and Chief Operating Officer       1997
Thomas I. Boggs, Jr.      51    Senior Vice President -- Underwriting                      1995
Karl O. Johnson           66    Senior Vice President, Superior Pacific                    1989
Douglas R. Roche          58    Senior Vice President -- Management Information Systems    1990
Robert E. Nagle           49    Senior Vice President, General Counsel and Secretary       1996
James L. Cinney           57    Senior Vice President, Superior Pacific                    1994
Edward C. Shoop           54    Senior Vice President and Chief Actuary                    1997
Theresa A. Sealy          50    Senior Vice President -- California Operations             1998
Matthew Natalizio         43    Vice President -- Finance and Treasurer                    1994
</TABLE>
 
     Executive officers of the Company are elected by and serve at the
discretion of the Board. No arrangement exists between any executive officer and
any other person or persons pursuant to which any executive officer was or is to
be selected as an executive officer. None of the executive officers has any
family relationship to any director or to any other executive officer of the
Company. Set forth below is a brief description of the business experience for
at least the previous five years of all of the executive officers.
 
     William L. Gentz has held the positions of President and Chief Executive
Officer since mid-1994, and has served as a director of the Company since June
1994. Mr. Gentz joined the Company after seventeen years at Zenith Insurance
Company, where he was responsible for marketing, underwriting, loss control, and
field operations for Zenith's workers' compensation operations. Mr. Gentz began
his insurance career in 1958, and from 1958 to 1968 worked in the marketing and
underwriting departments of a variety of insurance companies in the mid-west and
California.
 
     J. Chris Seaman has held the positions of Executive Vice President since
February 1995 and Chief Financial Officer since July 1991, and has served as a
director of the Company since March 1993. Prior to joining the Company, Mr.
Seaman was the Chief Financial Officer of a private company engaged in insurance
company acquisitions, following ten years with Ernst & Whinney. Mr. Seaman
previously held staff and management positions at Industrial Indemnity Insurance
Company and Allianz of America Corporation, respectively.
 
     Arnold J. Senter has held the positions of Executive Vice President and
Chief Operating Officer since February 1997. Prior to joining the Company, Mr.
Senter most recently served as Senior Vice President, Southwest and Southeast
Operations at Zenith National Insurance Company, and had previously held various
operational positions in nearly every functional area for Zenith since 1981. Mr.
Senter has 30 years experience with both regional and national carriers.
 
     Thomas I. Boggs, Jr. was appointed Senior Vice President -- Underwriting
effective March 1995. From October 1993 to March 1995, he served as Assistant
Vice President of Fremont Compensation Insurance Company and from October 1991
to October 1993 served as Business Development Executive for the Southern
California Commercial Insurance Center for Fireman's Fund Insurance Company.
Prior to October 1991, Mr. Boggs held various underwriting and marketing
positions at Cypress Insurance Company, Industrial Indemnity Insurance Company,
and Safeco.
 
                                       89
<PAGE>   92
 
     Karl O. Johnson has been responsible for SNIC's Central California
Operations since 1989. He was promoted to Senior Vice President in 1994. Mr.
Johnson has served with various insurance organizations in loss control and
marketing capacities since 1955; he joined the Company in 1987.
 
     Douglas R. Roche was appointed Senior Vice President -- Management
Information Systems in 1994 and served in such position until January 1997 at
which point he was appointed Senior Vice President -- Claims. He served in such
position until September 1997 when he was reappointed Senior Vice President --
Management Information Systems. Before 1994, he served as Vice President of
Internal Operations from the time he joined the Company in 1990. From 1987 to
1990, Mr. Roche sold software and provided systems consulting services to the
insurance industry. From 1969 to 1987 he held a variety of management positions
in various insurance companies' systems analysis operations.
 
     Robert E. Nagle has held the positions of Senior Vice President, General
Counsel, and Secretary since January 1996. From 1986 until he joined the
Company, Mr. Nagle was corporate counsel and senior corporate counsel for
Farmers Group, Inc.
 
     James L. Cinney has been responsible for Superior Pacific's Woodland Hills
branch since 1997. Prior to that, he held the position of Senior Vice
President -- Loss Control of SNIC from 1994. Before joining the Company, Mr.
Cinney was self-employed in the hospitality industry for one year. Prior to
that, he was Vice President, responsible for loss control, at Industrial
Indemnity Insurance Company. Mr. Cinney has 30 years of workers' compensation
loss control experience in a variety of staff and management positions with
Industrial Indemnity Insurance Company, Zenith Insurance Company, Employee
Benefits Insurance Company, and Hanover Cal/Comp Insurance Company.
 
     Edward C. Shoop was appointed Senior Vice President and Chief Actuary in
October 1997. From April 1995 to August 1997 he served as Senior Vice President
and Actuary with Zenith Insurance Company, and from March 1994 to April 1995
served as Vice President and Actuary with Great States Insurance Company. Prior
to that, Mr. Shoop was Vice President and Actuary with the Workers' Compensation
Insurance Rating Bureau of Massachusetts from November 1991 to March 1994. Mr.
Shoop's 31 years of actuarial experience also includes working for Fireman's
Fund Insurance Company and Royal Insurance Company of Canada, as a Vice
President, and for Aetna Life and Casualty Company.
 
     Theresa A. Sealy was appointed Senior Vice President -- California
Operations in July 1998. From November 1997 to June 1998 she served as Vice
President of the Company. From June 1997 until she joined the Company, she
served as regional manager for CalComp and, prior to that, served as a Senior
Vice President of Allianz Insurance Company since February 1992.
 
     Matthew Natalizio has held the position of Vice President -- Finance and
Treasurer since 1994. From 1988 until he joined the Company, Mr. Natalizio was
employed by KPMG Peat Marwick LLP.
 
SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE
 
     Section 16(a) of the Exchange Act ("Section 16(a)") requires the Company's
directors and certain of its officers, and persons who own more than ten percent
of a registered class of the Company's equity securities (collectively,
"Insiders"), to file reports of ownership and changes in ownership with the SEC.
Insiders are required by SEC regulations to furnish the Company with copies of
all Section 16(a) forms they file.
 
     Based solely on its review of the copies of such forms received by it, or
written representations from certain reporting persons that no Forms 5 were
required for those persons, the Company believes that its Insiders complied with
all applicable Section 16(a) filing requirements for fiscal 1997, with the
exception of (i) Curtis H. Carson, an executive officer of the Company, who
filed a Form 5 to report one transaction that was not reported on a Form 4 on a
timely basis, and (ii) IIA and International Insurance Investors (Bermuda)
Limited, each of which filed a late Form 4 to report the same two transactions.
 
                                       90
<PAGE>   93
 
EXECUTIVE COMPENSATION
 
     The following table sets forth certain information concerning the
compensation for services in all capacities to the Company for the fiscal years
ended December 31, 1997, 1996, and 1995 of those persons who were, at December
31, 1997, (i) the chief executive officer and (ii) the other four most highly
compensated executive officers of the Company.
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                               ANNUAL COMPENSATION                LONG TERM COMPENSATION
                                         --------------------------------   -----------------------------------
                                                                                    AWARDS             PAYOUT
                                                                            -----------------------   ---------
                                                                  OTHER     RESTRICTED   SECURITIES
                                                                 ANNUAL       STOCK      UNDERLYING                ALL OTHER
                                                                 COMPEN-      AWARDS      OPTIONS/      LTIP        COMPEN-
  NAME AND PRINCIPAL POSITION     YEAR   SALARY(1)   BONUS(2)   SATION($)      (3)        SARS(#)     PAYOUT(#)    SATION(4)
- --------------------------------  ----   ---------   --------   ---------   ----------   ----------   ---------   ------------
<S>                               <C>    <C>         <C>        <C>         <C>          <C>          <C>         <C>
William L. Gentz................  1997   $293,830    $     --      --        $121,250(5)   18,800        --          $2,250
  President and Chief             1996    298,300     278,500      --          46,874      17,875        --           2,250
  Executive Officer               1995    294,508     203,500      --          53,690      19,175        --           2,250
J. Chris Seaman.................  1997    231,616          --      --         109,125(6)   17,500        --           2,250
  Executive Vice President        1996    235,298     128,500      --          36,223      13,813        --           2,250
  and Chief Financial Officer     1995    215,600     128,500      --          40,170      39,325        --           2,250
Arnold J. Senter(7).............  1997    229,335          --      --              --      25,000        --           2,250
  Executive Vice President        1996         --          --      --              --          --        --              --
  and Chief Operating Officer     1995         --          --      --              --          --        --              --
Matthew Natalizio...............  1997    183,292          --      --          18,188(8)    2,786        --           2,250
  Vice President --               1996    131,004      35,000      --          20,058       6,500        --           1,875
  Finance and Treasurer           1995    138,504      30,000      --           7,280       2,600        --           2,078
Thomas I. Boggs, Jr.............  1997    164,261          --      --          30,313(10)    4,643       --           2,250
  Senior Vice President --
    Underwriting(9)               1996    155,800      32,000      --          21,306       8,125        --           2,163
                                  1995    115,917       7,000      --          13,000      12,150        --           1,098
</TABLE>
 
- ------------------------------
 (1) The amounts set forth for fiscal year 1997 include salary and other cash
     compensation paid in that year, other than amounts listed in the column
     entitled "Bonus."
 
 (2) Bonus amounts represent cash payments and are presented in the year to
     which they apply, although payment typically is made in April of the
     subsequent year. No bonus payments were made for fiscal year 1997.
 
 (3) Represents the fair market value of the underlying shares on the date of
     grant.
 
 (4) Represents the employer's contribution under the Company's 401(k) Plan.
 
 (5) Represents a grant of 10,000 shares of Restricted Stock that vests in nine
     equal annual increments following the date of grant. As of December 31,
     1997, Mr. Gentz held an aggregate of 29,950 shares of Restricted Stock
     valued at $434,275, based upon the $14.50 per share fair market value of
     the Common Stock on such date.
 
 (6) Represents a grant of 9,000 shares of Restricted Stock that vests in nine
     equal annual increments following the date of grant. As of December 31,
     1997, Mr. Seaman held an aggregate of 24,163 shares of Restricted Stock
     valued at $350,364, based upon the $14.50 per share fair market value of
     the Common Stock on such date.
 
 (7) Mr. Senter began his employment with the Company in February 1997.
 
 (8) Represents a grant of 1,500 shares of Restricted Stock that vests in nine
     equal increments following the date of grant. As of December 31, 1997, Mr.
     Natalizio held an aggregate of 6,399 shares of Restricted Stock valued at
     $92,786, based upon the $14.50 per share fair market value of the Common
     Stock on such date.
 
 (9) Mr. Boggs began his employment with the Company in March 1995.
 
(10) Represents a grant of 2,500 shares of Restricted Stock that vests in nine
     equal annual increments following the date of grant. As of December 31,
     1997, Mr. Boggs held an aggregate of 9,375 shares of Restricted Stock
     valued at $135,938, based upon the $14.50 per share fair market value of
     the Common Stock on such date.
 
                                       91
<PAGE>   94
 
EMPLOYMENT AGREEMENTS
 
     The Company has in effect employment agreements with the following
officers:
 
     William L. Gentz, President and Chief Executive Officer. Mr. Gentz's
agreement expires on June 1, 1999, but is subject to automatic renewal in
one-year increments unless notification of non-renewal is given sixty days prior
to the expiration of the then-current term. His salary was set as of June 1,
1994 at $275,000 annually, plus benefits and incidentals generally provided to
officers of the Company, and is thereafter as determined by the Board. Mr.
Gentz's annual salary was increased to $287,500 effective August 1, 1995. If Mr.
Gentz's employment is terminated by the Company other than for cause, he is
entitled to payment of his salary and benefits for the then-remaining term of
his agreement. In the event of a change in control of the Company, Mr. Gentz
would be deemed terminated without cause and his employment agreement would be
deemed to have a three-year remaining term.
 
     Arnold J. Senter, Executive Vice President and Chief Operating Officer. Mr.
Senter's agreement expires on February 17, 1999, but is subject to automatic
renewal in one-year increments unless notification of non-renewal is given sixty
days prior to the expiration of the then-current term. His salary was set as of
February 17, 1997 at $200,000 annually, plus benefits and incidentals generally
provided to officers of the Company, and is thereafter as determined by the
Board. If Mr. Senter's employment is terminated by the Company other than for
cause, he is entitled to payment of his salary and benefits for the
then-remaining term of his agreement. In the event of a change in control of the
Company, Mr. Senter would be deemed terminated without cause and his employment
agreement would be deemed to have a three-year remaining term.
 
     J. Chris Seaman, Executive Vice President and Chief Financial Officer. Mr.
Seaman's agreement expires on June 1, 1999, but is subject to automatic renewal
in one-year increments unless notification of non-renewal is given sixty days
prior to the expiration of the then-current term. His annual salary under the
agreement is $200,000, plus benefits and incidentals generally provided to
officers of the Company, and is thereafter as determined by the Board. If Mr.
Seaman's employment is terminated by the Company other than for cause, he is
entitled to payment of his salary and benefits for the then-remaining term of
his agreement. In the event of a change in control of the Company, Mr. Seaman
would be deemed terminated without cause and his employment agreement would be
deemed to have a three-year remaining term.
 
     Edward C. Shoop, Senior Vice President and Chief Actuary. Mr. Shoop's
agreement expires on October 6, 1999 and provides that, if his employment with
the Company is terminated as a result of a change in control, he will be
entitled to his salary and benefits for two years from the date of his
termination.
 
     Each of Messrs. Gentz, Senter, Seaman, and Shoop have acknowledged that the
acquisition by IP of a majority of the outstanding Common Stock, should it occur
as a result of the Equity Financings, does not constitute a change in control
for purposes of their employment agreements.
 
     Matthew Natalizio, Vice President -- Finance and Treasurer. Mr. Natalizio's
agreement is open-ended. His compensation and benefits are determined by the
Board. If Mr. Natalizio's employment is terminated by the Company other than for
cause, he is entitled to payment of his salary and benefits for one year from
the date of the termination. Mr. Natalizio's agreement does not provide any
special rights in the event of a change in control.
 
CHANGE IN CONTROL ARRANGEMENTS
 
     In addition to the rights described above with respect to Messrs. Gentz,
Senter, Seaman, and Shoop, the only change in control arrangement in place is in
connection with the Company's stock incentive plans. Under the terms of the 1986
Non-Statutory Stock Option and 1986 Non-Statutory Stock Purchase Plan (the "1986
Plan"), upon a change of control of the Company, unless replacement options to
purchase stock in the new or recapitalized entity are offered, all option
holders will have thirty days to exercise their outstanding options, excluding
those that have then not yet vested. Under the terms of the 1995 Stock Incentive
Plan (the "1995 Plan"), under similar circumstances, the Compensation Committee
may, in its discretion, allow each person holding an option or Restricted Stock
who did not receive a replacement equity incentive grant to exercise that
                                       92
<PAGE>   95
 
option without regard to its vesting provisions, or to retain that Restricted
Stock without regard to the Company's repurchase right, as applicable.
 
EQUITY INCENTIVE GRANTS
 
     Officers, key employees, including directors who are key employees, and
consultants chosen by the Compensation Committee are eligible to participate in
the 1995 Plan.
 
     Under the 1995 Plan, officers, key employees, and consultants of the
Company or its subsidiaries may be granted Options to purchase shares of Common
Stock or they may be given the opportunity to purchase Restricted Stock of the
Company. The 1995 Plan permits the granting both of options that qualify for
treatment as Incentive Stock Options under Section 422 of the Code and those
that do not, referred to as Nonqualified Stock Options. The 1995 Plan also
allows for the issuance of Restricted Stock, which is subject to the Company's
right of repurchase, which expires over time.
 
     In 1986, the Company adopted the 1986 Plan, which allowed the Company to
issue to employees of the Company and its subsidiaries Nonqualified Stock
Options and rights to purchase Common Stock. The purchase right aspect of the
1986 Plan was terminated by the Board of Directors in 1989. Following the
adoption of the 1995 Plan, the Board of Directors determined to make no further
grants pursuant to the 1986 Plan.
 
OPTION GRANTS IN LAST FISCAL YEAR
 
     The following table sets forth information concerning Options granted
during fiscal 1997 to each of the executive officers named in the Summary
Compensation Table set forth above under "-- Executive Compensation."
 
<TABLE>
<CAPTION>
                                                  INDIVIDUAL GRANTS
                               -------------------------------------------------------   POTENTIAL REALIZABLE VALUE AT
                                               % OF TOTAL                                   ASSUMED ANNUAL RATES OF
                                NUMBER OF     OPTIONS/SARS     EXERCISE                   STOCK PRICE APPRECIATION FOR
                                SECURITIES     GRANTED TO         OR                              OPTION TERM
                                UNDERLYING     EMPLOYEES         BASE                    ------------------------------
                               OPTIONS/SARS    IN FISCAL        PRICE       EXPIRATION              5%          10%
            NAME                GRANTED(#)        YEAR        ($/SH)(1)        DATE      0%(2)    ($)(3)       ($)(3)
- -----------------------------  ------------   ------------   ------------   ----------   -----   ---------   ----------
<S>                            <C>            <C>            <C>            <C>          <C>     <C>         <C>
William L. Gentz.............   18,800(4)         14.9          12.125       3/31/07      --      143,414     363,294
J. Chris Seaman..............   17,500(4)         13.8          12.125       3/31/07      --      133,497     338,172
Arnold J. Senter.............   25,000(4)         19.8          11.380       2/17/07      --      178,920     453,419
Matthew Natalizio............    2,786(4)          2.2          12.125       3/31/07      --       21,244      53,837
Thomas I. Boggs, Jr..........    4,643(4)          3.7          12.125       3/31/07      --       35,419      89,722
</TABLE>
 
- ------------------------------
(1) Represents the fair market value of the underlying shares of Common Stock at
    the time of the grant.
 
(2) Unless the stock price increases, which will benefit all stockholders
    commensurately, an option holder will realize no gain.
 
(3) Represents the value of the shares of Common Stock issuable upon the
    exercise of the option, assuming the stated rates of price appreciation for
    ten years, compounded annually, with the aggregate exercise price deducted
    from the final appreciated value. The 5% and 10% rates are established by
    the SEC as examples only and are not intended to forecast future
    appreciation in the Common Stock price.
 
(4) Represents a ten-year, Incentive Stock Option grant, vesting at a rate of
    20% per year for five years from the date of grant, granted pursuant to the
    1995 Plan.
 
                                       93
<PAGE>   96
 
OPTION EXERCISES AND YEAR-END VALUE
 
     The following table sets forth information concerning the aggregate number
of options exercised during fiscal 1997 by each of the executive officers named
in the Summary Compensation Table set forth above under "-- Executive Officers
and Executive Compensation" and outstanding options held by each such officer as
of December 31, 1997.
 
<TABLE>
<CAPTION>
                                                                    NUMBER OF
                                                                    SECURITIES
                                                                    UNDERLYING
                                                                   UNEXERCISED
                                                                     OPTIONS/         VALUE OF UNEXERCISED
                                                                     SARS AT          IN-THE-MONEY OPTIONS/
                                                                   FISCAL YEAR-              SARS AT
                                                                      END(#)           FISCAL YEAR-END(1)
                                                                ------------------    ---------------------
                              SHARES ACQUIRED       VALUE          EXERCISABLE/           EXERCISABLE/
            NAME              ON EXERCISE(#)     REALIZED($)      UNEXERCISABLE           UNEXERCISABLE
- ----------------------------  ---------------    -----------    ------------------    ---------------------
<S>                           <C>                <C>            <C>                   <C>
William Gentz...............        --               --           29,995/57,105         $280,133/405,606
J. Chris Seaman.............        --               --           40,591/45,047          392,016/304,878
Arnold J. Senter............        --               --                0/25,000                 0/78,000
Matthew Natalizio...........        --               --            8,340/13,546           78,068/104,719
Thomas I. Boggs, Jr.........        --               --            6,485/18,433           60,847/141,419
</TABLE>
 
- ------------------------------
(1) Uses a fair market value at December 31, 1997 of $14.50 per share, with the
    aggregate exercise price deducted from the total value of the Common Stock
    underlying the options.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     The Compensation Committee during the fiscal year ended December 31, 1997
consisted of Messrs. Noble, Cooper, and Germain, each of whom was a non-employee
director. Mr. Cooper is an employee of IIA, which was paid $250,000 by the
Company in fiscal 1997 for investment banking and financial consulting services.
Mr. Germain is an officer and a director of Centre Re, which was involved in
several transactions with the Company during 1997 involving payments in excess
of $60,000. See "Certain Relationships and Related Transactions."
 
     During fiscal 1997, no officers participated in deliberations of the
Compensation Committee concerning executive officer compensation, except William
Gentz, the Company's President and Chief Executive Officer.
 
         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
 
     The table below sets forth certain information regarding the beneficial
ownership of the Company's voting securities as of June 30, 1998 by each person
who is known by the Company to be the beneficial owner of more than 5% of the
indicated classes of the Company's voting securities and the estimated
beneficial ownership of the Company's voting securities by each such person as
of October 30, 1998, the estimated date on which the Closing will occur (the
"Closing Date"), after giving effect to the consummation of the Equity
Financings. On March 31, 1992, the Company issued its 14.5% Senior Subordinated
Voting Notes due April 1, 2002 (the "Voting Notes") in connection with a
transaction wherein the Company issued its 14.5% Senior Subordinated Promissory
Notes (the "14.5% Notes") in an aggregate principal amount of $11.0 million,
together with warrants to purchase approximately 1,616,886 shares of Common
Stock. The Company redeemed all of the 14.5% Notes with a prepayment, effective
June 30, 1994, except for the Voting Notes, with respect to which prepayment is
prohibited. See "Certain Relationships and Related Transactions -- Transactions
with Affiliates of Zurich, Including Centre Re." The outstanding principal
amount of the Voting Notes is $30,000. The number of votes attaching to the
Voting Notes is equal to the number of shares of Common Stock that may be
purchased upon exercise of the warrants that were issued in that March 31, 1992
transaction and that remain outstanding and are unexercised as of the applicable
record date for a stockholder vote. As of June 30, 1998, the
 
                                       94
<PAGE>   97
 
number of votes held by III, the holder of the Voting Notes, was equivalent to
1,566,465 shares of Common Stock. The holder of the Voting Notes is permitted to
vote only in director elections, director removals, votes on amending that right
to vote, and changes to the number of authorized directors. As a result of the
cancellation of a portion of the relevant warrants, the number of Common Stock
equivalent votes held under the Voting Notes has decreased somewhat since March
31, 1992. The specific voting rights of the Voting Notes are set forth in the
Company's Certificate of Incorporation and Bylaws.
 
                           CERTAIN BENEFICIAL OWNERS
 
<TABLE>
<CAPTION>
                                                                        COMMON STOCK
                                                                        AS ADJUSTED
                                                                       FOR THE EQUITY
                                             COMMON STOCK(1)           FINANCINGS(2)            VOTING NOTES
                                          ----------------------   ----------------------   --------------------
                                                                                              SHARES
            NAME AND ADDRESS               SHARES     PERCENT(3)    SHARES     PERCENT(4)   EQUIVALENT   PERCENT
- ----------------------------------------  ---------   ----------   ---------   ----------   ----------   -------
<S>                                       <C>         <C>          <C>         <C>          <C>          <C>
"III"...................................    217,942(5)    3.58%      435,884(5)    2.39%    1,566,465(5)   100%
International Insurance Investors, L.P.,
  a Bermuda limited partnership
  c/o International Insurance Investors
  (Bermuda) Limited, General Partner
  Cumberland House
  One Victoria Street
  Hamilton HM HX, Bermuda
"IP DELAWARE"...........................  1,375,547(6)   23.41%    3,361,928(6)   18.40%       --           --
Insurance Partners, L.P.
  201 Main Street
  Suite 2600
  Ft. Worth, Texas 76102
"IP II".................................         --        --      3,348,206(7)   18.35%       --           --
Insurance Partners II, L.P. and/or
Insurance Partners II Private Fund, L.P.
  One Chase Manhattan Plaza
  New York, New York 10005
"IIA"...................................  1,243,332(8)   17.46%    1,243,332(8)    6.49%       --           --
International Insurance Advisors, Inc.
  One Chase Manhattan Plaza
  44th Floor
  New York, New York 10005
"IP BERMUDA"............................    765,304(9)   13.02%    1,571,137(9)    8.67%       --           --
Insurance Partners Offshore (Bermuda),
  L.P.
  Cedar House
  41 Cedar Avenue
  P.O. Box HM 1179
  Hamilton HM HX, Bermuda
"CENTRELINE"............................    579,356(10)    8.97%   1,158,712(10)    6.22%      --           --
CentreLine Reinsurance Limited,
  a Bermuda corporation
  Cumberland House
  One Victoria Street
  Hamilton HM HX, Bermuda
"TJS"...................................    529,652(11)    9.01%   1,405,750(11)    7.72%      --           --
TJS Partners, L.P.
  52 Vanderbilt Avenue, 5th Floor
  New York, New York 10017
"CENTRE RE".............................    395,128(12)    6.30%     790,256(12)    4.29%      --           --
Centre Reinsurance Limited
  One Victoria Street
  Seventh Floor
  Hamilton HM HX, Bermuda
</TABLE>
 
                                       95
<PAGE>   98
 
<TABLE>
<CAPTION>
                                                                        COMMON STOCK
                                                                        AS ADJUSTED
                                                                       FOR THE EQUITY
                                             COMMON STOCK(1)           FINANCINGS(2)            VOTING NOTES
                                          ----------------------   ----------------------   --------------------
                                                                                              SHARES
            NAME AND ADDRESS               SHARES     PERCENT(3)    SHARES     PERCENT(4)   EQUIVALENT   PERCENT
- ----------------------------------------  ---------   ----------   ---------   ----------   ----------   -------
<S>                                       <C>         <C>          <C>         <C>          <C>          <C>
"BISHOP ESTATE".........................    326,552(13)    5.26%     653,104(13)    3.56%      --           --
Trustees of the Estate of Bernice P.
  Bishop
  567 South King Street
  Suite 200
  Honolulu, Hawaii 96813
</TABLE>
 
- ------------------------------
 (1) Includes warrants expiring on April 1, 2002 to purchase 1,566,465 shares of
     Common Stock and a warrant expiring on April 1, 2002 to purchase 579,356
     shares of Common Stock described more fully in footnote 10, below. All such
     warrants are subject to an agreement among all warrant holders, that
     prohibits the exercise or transfer of any such warrants until April 2000
     unless prior approval from the Board of Directors is obtained. Assuming
     that the Company's stockholders approve a proposal to remove certain
     transfer restrictions contained in the Company's Certificate of
     Incorporation at the Company's upcoming annual meeting of stockholders, it
     is anticipated that this agreement will terminate upon the consummation of
     the Equity Financings. Certain warrants were issued on March 31, 1992 in a
     transaction in which the Company issued (a) warrants to purchase
     approximately 1,616,886 shares of Common Stock and (b) promissory notes in
     the aggregate principal amount of $11.0 million to III and certain members
     of the Company's management. These warrants are exercisable at $4.00 per
     share. The warrants purchased by III, initially exercisable into 1,474,306
     shares of Common Stock, were originally issued to IIA, as agent for each of
     the limited partners and the general partner of III. These warrants have
     since been distributed to the partners of III; however, IIA's revocable
     agency relationship with such partners was reestablished after the
     distribution. Since the distribution, some of these partners sold their
     warrants to certain third parties that do not have such an agency
     relationship with IIA. See footnote 8 below. The Company has retired
     certain warrants issued to members of management no longer employed by the
     Company.
 
 (2) Assumes that the Rights issued in the Rights Offering to such person are
     exercised in full by that person and that the number of shares of Common
     Stock beneficially owned by that person on the Record Date and immediately
     prior to the consummation of the Equity Financings is the same number
     beneficially owned as of June 30, 1998.
 
 (3) Percent ownership is based on the number of shares outstanding as of June
     30, 1998, that number is 5,876,368 shares, plus any shares issuable
     pursuant to warrants held by the entity in question which may be exercised
     within 60 days after June 30, 1998. See footnote 1 regarding certain
     contractual provisions that restrict the ability of warrant holders to
     exercise such warrants.
 
 (4) Percent ownership is based on the number of shares estimated to be
     outstanding as of October 30, 1998, the estimated Closing Date, which
     number is 18,036,972 shares, plus any shares issuable pursuant to warrants
     held by the entity in question that may be exercised within 60 days
     thereof. See footnote 1 regarding certain contractual provisions that
     restrict the ability of warrant holders to exercise warrants.
 
 (5) Robert A. Spass, Craig F. Schwarberg, and Bradley E. Cooper, each of whom
     is a director of the Company, beneficially own limited partnership
     interests in III of 0.583%, 0.225%, and 0.075%, respectively. In addition,
     Mr. Spass has voting power over all of the voting capital stock of
     International Insurance Investors (Bermuda) Limited ("III (Bermuda)"), the
     general partner of III; however, pursuant to an agreement between the board
     of directors of III (Bermuda) and Mr. Spass, the board of directors (of
     which Mr. Spass is not a member) is entitled to make all voting and
     investment decisions with respect to the warrants held by III (Bermuda) and
     the Common Stock issuable upon the exercise thereof. III (Bermuda)
     beneficially owns warrants to purchase 13,183 shares of Common Stock that
     are held by IIA, as its agent. In addition, as contemplated by the terms of
     III's limited partnership agreement, the limited partners and III (Bermuda)
     transferred warrants to purchase an aggregate of 204,759 shares of Common
     Stock to III to be held by III (subject to IIA's revocable agency
     relationship) in reserve for the payment to III (Bermuda) of its incentive
     fee under such limited
 
                                       96
<PAGE>   99
 
     partnership agreement. Upon the occurrence of certain events, Messrs.
     Spass, Schwarberg, and Cooper, Centre Re and others will be entitled to a
     distribution of the warrants presently held by III (subject to IIA's
     revocable agency relationship) in amounts to be determined at the time of
     distribution. Each such party presently disclaims beneficial ownership (as
     defined in Rule 13d-3 under the Exchange Act) of all such warrants. See
     footnote 8 below. See also "Certain Relationships and Related
     Transactions -- 1996-97 Transactions with IP and Limitations on Related
     Party Control" and "-- Participation by IP in the Equity Financings and
     Limitations on Related Party Control," regarding restrictions on III's
     ability to acquire additional equity securities of the Company.
 
 (6) Represents shares of Common Stock held by IP Delaware. Robert A. Spass and
     Steven B. Gruber, directors of the Company, are the President and a Vice
     President, respectively, of Insurance GenPar MGP, Inc. ("GenPar Inc."), the
     general partner of Insurance GenPar MGP, L.P. ("GenPar MGP"), the general
     partner of Insurance GenPar, L.P. ("GenPar," and, together with GenPar MGP
     and IP Delaware, the "Delaware Partnerships"), which is the general partner
     of IP Delaware. Mr. Spass owns 40% and Messrs. Gruber and Daniel L.
     Doctoroff each own 30% of the voting capital stock of GenPar Inc. In
     addition, Messrs. Spass, Gruber, Doctoroff, and Cooper, own direct or
     indirect limited partnership interests in certain of the Delaware
     Partnerships. Each of Messrs. Spass, Gruber, Cooper, and Doctoroff
     disclaims beneficial ownership (as defined in Rule 13d-3 under the Exchange
     Act) of all shares of Common Stock held by IP Delaware. See "Certain
     Relationships and Related Transactions -- 1996-97 Transactions with IP and
     Limitations on Related Party Control" and "-- Participation by IP in the
     Equity Financings and Limitations on Related Party Control," regarding
     restrictions on IP Delaware's ability to acquire additional equity
     securities of the Company. Assuming no shares of Common Stock are purchased
     by IP Delaware under the Standby Commitment, then, upon consummation of the
     Equity Financings, IP Delaware would beneficially own 3,361,928 shares of
     Common Stock, which includes 229,754 shares of Common Stock issuable upon
     exercise of the Commitment Fee Warrants to be acquired by IP Delaware. In
     the unlikely event that IP Delaware is required to exercise the Standby
     Commitment in full, then IP Delaware would beneficially own 5,342,805
     shares of Common Stock, which includes 229,754 shares of Common Stock
     issuable upon exercise of the Commitment Fees Warrants to be acquired by IP
     Delaware, representing 29.24% of the Common Stock estimated to be then
     outstanding.
 
 (7) Represents shares of Common Stock to be purchased by IP II, pursuant to the
     IP Stock Issuance and 205,520 shares issuable upon exercise of the
     Commitment Fee Warrants to be acquired by IP II assuming that it is not
     required to purchase any shares of Common Stock under the Standby
     Commitment. In the unlikely event that IP II is required to exercise the
     Standby Commitment in full, then IP II would beneficially own 6,892,087
     shares of Common Stock, which includes 205,520 shares of Common Stock
     issuable upon exercise of the Commitment Fee Warrants to be acquired by IP
     II, representing 37.78% of the Common Stock estimated to be then
     outstanding.
 
 (8) Represents warrants to purchase shares of Common Stock that are held by
     IIA, as agent for each of the limited partners and for the general partner
     of III, as discussed in footnotes 1 and 5 above. As agent for such
     partners, IIA has the revocable authority to exercise rights set forth in
     the warrants and to vote any shares of Common Stock issuable upon exercise
     of the warrants. Robert A. Spass, a director of the Company, is an officer
     of IIA and as such, has the authority to exercise these rights. The
     partners who, upon revocation of IIA's authority, would be entitled to
     exercise warrants covering more than 5% of the Common Stock are Centre Re
     and Bishop Estate, in the share amounts and percentages stated. See
     "Certain Relationships and Related Transactions -- 1996-97 Transactions
     with IP and Limitations on Related Party Control" and "-- Participation by
     IP in the Equity Financings and Limitations on Related Party Control,"
     regarding restrictions on IIA's ability to acquire additional equity
     securities of the Company or exercise warrants to purchase Common Stock.
     Because IIA is not the record holder of the warrants it beneficially owns,
     IIA will not receive any Rights in the Rights Offering; as a result, its
     beneficial ownership will not change upon consummation of the Equity
     Financings.
 
 (9) Represents shares of Common Stock held by IP Bermuda. Robert A. Spass and
     Steven B. Gruber, directors of the Company, are the President and a Vice
     President, respectively, of Insurance GenPar (Bermuda) MGP, Ltd. ("GenPar
     (Bermuda) Ltd."), the general partner of Insurance GenPar
                                       97
<PAGE>   100
 
     (Bermuda) MGP, L.P. ("GenPar (Bermuda) MGP"), the general partner of
     Insurance GenPar (Bermuda), L.P. ("GenPar (Bermuda)" and, together with
     GenPar (Bermuda) MGP and IP Bermuda, the "Bermuda Partnerships"), which is
     the general partner of IP Bermuda. Robert A. Spass owns 40% and Messrs.
     Gruber and Doctoroff each own 30% of the voting capital stock of GenPar
     (Bermuda) Ltd. In addition, each of Messrs. Spass, Gruber, and Doctoroff
     and Bradley E. Cooper, a director of the Company, owns direct or indirect
     limited partnership interests in certain of the Bermuda Partnerships. Each
     of Messrs. Spass, Gruber, Cooper, and Doctoroff disclaims beneficial
     ownership (as defined in Rule 13d-3 under the Exchange Act) of all shares
     of Common Stock held by IP Bermuda. See "Certain Relationships and Related
     Transactions -- 1996-97 Transactions with IP and Limitations on Related
     Party Control" and "-- Participation by IP in the Equity Financings and
     Limitations on Related Party Control," regarding restrictions on IP
     Bermuda's ability to acquire additional equity securities of the Company.
     Assuming no shares of Common Stock are purchased by IP Bermuda under the
     Standby Commitment, then upon consummation of the Equity Financings, IP
     Bermuda would beneficially own 1,571,137 shares of Common Stock, which
     includes 93,206 shares of Common Stock issuable upon exercise of the
     Commitment Fee Warrants to be acquired by IP Bermuda. In the unlikely event
     that IP Bermuda is required to exercise the Standby Commitment in full,
     then IP Bermuda would beneficially own 2,374,737 shares of Common Stock,
     which includes 93,206 shares of Common Stock issuable upon exercise of the
     Commitment Fee Warrants to be acquired by IP Bermuda, representing 13.10%
     of the Common Stock estimated to be then outstanding.
 
(10) Represents a warrant to purchase 579,356 shares of Common Stock issued as
     of June 30, 1994 (the "CentreLine Warrant"). CentreLine is an affiliate of
     Centre Re. See footnote 12 below for information regarding Centre Re's
     beneficial ownership of securities of the Company. The CentreLine Warrant
     was issued in connection with a $20.0 million investment in the Company
     (and its affiliate, Superior National Capital, L.P.) by CentreLine and a
     second Centre Re affiliate, Centre Reinsurance Services (Bermuda) III
     Limited. The CentreLine Warrant is exercisable at $5.20 per share. Steven
     D. Germain, a director of the Company, is an officer and a director of both
     Centre Re and CentreLine. In addition to Mr. Germain, each of Steven M.
     Gluckstern, Michael D. Palm, and David A. Brown is an officer and/or
     director of both Centre Re and CentreLine. Messrs. Germain, Gluckstern,
     Palm and Brown disclaim any beneficial interest in the CentreLine Warrant
     and the Common Stock issuable upon its exercise, and in the warrants held
     by IIA, as agent for Centre Re (as described in footnote 12 below), and the
     shares of Common Stock issuable upon the exercise of such warrants.
     However, as officers and/or directors of both Centre Re and CentreLine,
     such persons share voting and/or investment power over such securities
     (subject to the agency appointment described in footnotes 1 and 8 above).
     See "Certain Relationships and Related Transactions -- 1996-97 Transactions
     with IP and Limitations on Related Party Control" and "-- Participation by
     IP in the Equity Financings and Limitations on Related Party Control,"
     regarding restrictions on CentreLine's ability to acquire additional equity
     securities of the Company.
 
(11) TJS Corporation and its controlling stockholder, sole director, and
     executive officer, Thomas J. Salvatore, are the general partners of TJS
     Management, L.P., the general partner of TJS; exercise voting control and
     dispositive power over all shares presently owned; and are the beneficial
     owners of all such shares. The information contained in this footnote is
     based, in part, on an Amendment No. 2 to Schedule 13D/A, filed with the SEC
     in May 1997. Does not include 173,223 shares issuable upon the exercise of
     warrants acquired since May 1997 that are subject to an agreement among all
     holders of warrants, which prohibits the exercise or transfer of these
     warrants until April 2000 unless prior approval from the Board of Directors
     is obtained. See footnote 1 above. Because of these restrictions, TJS, TJS
     Management, L.P., TJS Corporation, and Mr. Salvatore disclaim beneficial
     ownership (as defined in Rule 13d-3 under the Exchange Act) of such
     warrants. Upon consummation of the Equity Financings and assuming the
     Company's stockholders approve a proposal to remove certain transfer
     restrictions in the Company's Certificate of Incorporation at the Company's
     upcoming annual meeting of stockholders, it is anticipated the agreement
     containing these restrictions will terminate. As a result, the number of
     shares TJS will beneficially own, as adjusted for the Equity Financings,
     would include the 173,223 shares of Common Stock issuable upon such
     warrants.
 
                                       98
<PAGE>   101
 
(12) Represents warrants to purchase shares of Common Stock received upon the
     distribution by III to its partners of warrants, as described in footnote 1
     above. See footnote 8 above for information concerning Centre Re's agency
     relationship with IIA with respect to such warrants and see footnote 10
     above for information concerning Centre Re's relationships with Steven D.
     Germain and CentreLine. See also "Certain Relationships and Related
     Transactions -- 1996-97 Transactions with IP and Limitations on Related
     Party Control" and "-- Participation by IP in the Equity Financings and
     Limitations on Related Party Control," regarding restrictions on Centre
     Re's ability to acquire additional equity securities of the Company. The
     reported number of shares issuable upon exercise of warrants does not
     include warrants to purchase 75,262 shares of Common Stock held by III
     (subject to IIA's revocable agency relationship) in reserve for the payment
     to III (Bermuda) of its incentive fee under III's limited partnership
     agreement. See footnote 5 above.
 
(13) Represents warrants to purchase shares of Common Stock received upon the
     distribution by III to its partners of warrants, as described in footnote 1
     above. Richard S.H. Wong, Oswald K. Stender, Lokelani Lindsey, Gerard A.
     Jervis, and Henry H. Peters, the trustees of the Bishop Estate, share
     voting and/or investment power over securities held by the Bishop Estate.
     Mr. Peters is a director of IIA. The reported number of shares issuable
     upon exercise of warrants does not include warrants to purchase 62,200
     shares of Common Stock held by III (subject to IIA's revocable agency
     relationship) in reserve for the payment to III (Bermuda) of its incentive
     fee under III's limited partnership agreement. See footnote 5 above.
 
SECURITY OWNERSHIP OF MANAGEMENT
 
     The following table sets forth certain information regarding the beneficial
ownership of Common Stock as of June 30, 1998 and the estimated beneficial
ownership of Common Stock as of October 30, 1998, the estimated Closing Date,
after giving effect to the consummation of the Equity Financings, by (i) each
director and certain executive officers of the Company, individually, and (ii)
all directors and executive officers as a group:
 
                            OWNERSHIP OF MANAGEMENT
 
<TABLE>
<CAPTION>
                                                                                AS ADJUSTED
                                                                              FOR THE EQUITY
                                                                                FINANCINGS
                                                                         -------------------------
                                           SHARES                         SHARES
                  NAME                      OWNED        PERCENT(1)      OWNED(2)       PERCENT(3)
- ----------------------------------------  ---------      ----------      ---------      ----------
<S>                                       <C>            <C>             <C>            <C>
William L. Gentz........................    115,349(4)      1.94%          268,921(4)      1.49%
J. Chris Seaman.........................    183,209(5)      3.05%          395,899(5)      2.18%
Arnold J. Senter........................      7,000(6)         *            46,500(6)         *
Matthew Natalizio.......................     26,351(7)         *            62,862(7)         *
Douglas R. Roche........................     32,481(8)         *            75,034(8)         *
Thomas J. Jamieson......................        300(9)         *               600(9)         *
Gordon E. Noble.........................      6,000            *            12,000            *
C. Len Pecchenino.......................     14,250            *            28,500            *
Robert A. Spass.........................     15,216(10)        *            30,432(10)        *
Craig F. Schwarberg.....................      2,790(11)        *             5,580(11)        *
Bradley E. Cooper.......................      4,930(12)        *             9,860(12)        *
Steven D. Germain.......................    980,964(13)    14.32%        1,961,928(13)    10.32%
Steven B. Gruber........................         --(14)       --                --(14)       --
Roger W. Gilbert........................         --           --                --           --
Directors and Executive Officers as a
  Group (20 persons)....................  1,505,777(15)    20.95%        3,211,168(15)    16.59%
</TABLE>
 
- ------------------------------
  *  Less than 1%
 
 (1) Percent ownership is based on the number of shares outstanding as of June
     30, 1998, which number is 5,876,368 shares, plus any shares issuable
     pursuant to options or warrants held by the person in question that may be
     exercised within 60 days after June 30, 1998. See footnote 1 to the
     preceding "Certain
 
                                       99
<PAGE>   102
 
     Beneficial Owners" table regarding certain contractual provisions that
     restrict the ability of warrant holders to exercise warrants.
 
 (2) Assumes that the Rights issued in the Stock Offering to such person are
     exercised in full by that person and that the number of shares of Common
     Stock beneficially owned by that person on the Record Date and immediately
     prior to the consummation of the Equity Financings is the same number
     beneficially owned as of June 30, 1998.
 
 (3) Percent ownership is based on the number of shares estimated to be
     outstanding as of October 30, 1998, the estimated Closing Date, which
     number is 18,036,972 shares, plus any shares issuable pursuant to options
     or warrants held by the person in question that may be exercised within 60
     days thereof.
 
 (4) Includes 47,415 shares issuable upon exercise of options that are
     exercisable within 60 days of June 30, 1998, in addition to 29,950
     Restricted Stock grants awarded under the 1995 Plan, of which the
     restrictions have lapsed as to 6,698 shares. As adjusted for the Equity
     Financings, includes 47,415 shares issuable upon exercise of options, each
     of which are exercisable within 60 days of October 30, 1998, and 29,950
     Restricted Stock grants, of which the restrictions have lapsed as to 6,698
     shares.
 
 (5) Includes 58,795 shares issuable upon exercise of warrants and 57,619 shares
     issuable upon exercise of options, each of which is exercisable within 60
     days of June 30, 1998, in addition to 24,163 Restricted Stock grants
     awarded under the 1995 Plan, of which the restrictions have lapsed as to
     5,240 shares. As adjusted for the Equity Financings, includes 58,795 shares
     issuable upon exercise of warrants and 57,619 shares issuable upon exercise
     of options, each of which are exercisable within 60 days of October 30,
     1998, and 24,163 Restricted Stock grants, of which the restrictions have
     lapsed as to 5,240 shares.
 
 (6) Includes 5000 shares issuable upon exercise of options that are exercisable
     within 60 days of June 30, 1998. As adjusted for the Equity Financings,
     includes 5,000 shares issuable upon the exercise of options that are
     exercisable within 60 days of October 30, 1998.
 
 (7) Includes 12,726 shares issuable upon exercise of options that are
     exercisable within 60 days of June 30, 1998, in addition to 6,399
     Restricted Stock grants awarded under the 1995 Plan, of which the
     restrictions have lapsed as to 1,425 shares. As adjusted for the Equity
     Financings, includes 12,726 shares issuable upon exercise of options that
     are exercisable within 60 days of October 30, 1998 and 6,399 Restricted
     Stock grants, of which the restrictions have lapsed as to 1,425 shares.
 
 (8) Includes 11,471 shares issuable upon exercise of options that are
     exercisable within 60 days of June 30, 1998, in addition to 6,387
     Restricted Stock grants awarded under the 1995 Plan, of which the
     restrictions have lapsed as to 1,320 shares. As adjusted for the Equity
     Financings, includes 13,798 shares issuable upon exercise of options that
     are exercisable within 60 days of October 30, 1998 and 6,387 Restricted
     Stock grants, of which the restrictions have lapsed as to 1,320 shares.
 
 (9) Represents shares owned of record by Jaco Oil Company, an entity controlled
     by Mr. Jamieson.
 
(10) Includes 8,000 shares of Common Stock owned directly by Mr. Spass. Also
     includes warrants to purchase 7,216 shares of Common Stock held by IIA, as
     agent, as described in footnote 7 of the preceding "Certain Beneficial
     Owners." Mr. Spass disclaims beneficial ownership (as defined in Rule 13d-3
     under the Exchange Act) of warrants to purchase 13,183 shares of Common
     Stock held by III (Bermuda) (subject to IIA's revocable agency
     relationship) in reserve for the payment to III (Bermuda) of its incentive
     fee under III's limited partnership agreement. See footnotes 5 and 8 of the
     preceding "Certain Beneficial Owners" table. Mr. Spass is an officer of
     IIA, which holds, as agent for the partners of III, warrants to purchase
     1,243,332 shares of Common Stock. In addition, see footnote 5 to the
     preceding "Certain Beneficial Owners" table concerning Mr. Spass' voting
     power with respect to the Voting Notes. Separately, 1,375,547 shares of
     Common Stock are beneficially owned by IP Delaware and 765,304 shares of
     Common Stock are beneficially owned by IP Bermuda. As adjusted for the
     Equity Financings, IP Delaware and IP Bermuda will beneficially own
     3,361,928 and 1,571,137 shares of Common Stock, respectively, assuming no
     shares are purchased under the Standby Commitment. In the unlikely event
     that the Standby Commitment is exercised in full, then IP Delaware and IP
     Bermuda would beneficially own 5,342,805 and 2,374,737 shares of Common
     Stock, respectively. See footnotes 6 and 9 to the preceding "Certain
     Beneficial Owners" table. Mr. Spass is the President of
 
                                       100
<PAGE>   103
 
     GenPar Inc. and GenPar (Bermuda) Ltd., the ultimate general partners of IP
     Delaware and IP Bermuda, respectively. Mr. Spass disclaims beneficial
     ownership (as defined in Rule 13d-3 under the Exchange Act) of all shares
     of Common Stock that are held by IP Delaware and IP Bermuda. See footnotes
     6 and 9 to the preceding "Certain Beneficial Owners" table for information
     concerning such partnerships. In addition, Mr. Spass is an officer of
     Capital Z, the general partner of IP II. Upon consummation of the Equity
     Financings, IP II will beneficially own 3,348,206 shares of Common Stock,
     assuming no shares are purchased under the Standby Commitment. In the
     unlikely event that IP II is required to exercise the Standby Commitment in
     full, then IP II would beneficially own 6,892,087 shares of Common Stock.
     Mr. Spass disclaims beneficial ownership (as defined in Rule 13d-3 under
     the Exchange Act) of all shares of Common Stock and the Commitment Fee
     Warrants to be acquired by IP II in connection with the Equity Financings.
     See footnote 7 to the preceding "Certain Beneficial Owners" table for
     information concerning IP II.
 
(11) Represents warrants to purchase 2,790 shares of Common Stock held by IIA,
     as agent, as described in footnote 8 of the preceding "Certain Beneficial
     Owners" table.
 
(12) Includes 4,000 shares of Common Stock owned directly by Mr. Cooper. Also
     includes warrants to purchase 930 shares of Common Stock held by IIA, as
     agent, as described in footnote 8 of the preceding "Certain Beneficial
     Owners" table. Mr. Cooper is also an officer of Capital Z, the general
     partner of IP II. Upon consummation of the Equity Financings, IP II will
     beneficially own 3,348,206 shares of Common Stock, assuming no shares are
     purchased under the Standby Commitment. In the unlikely event that IP II is
     required to exercise the Standby Commitment in full, then IP II would
     beneficially own 6,892,087 shares of Common Stock. Mr. Cooper disclaims
     beneficial ownership (as defined in Rule 13d-3 under the Exchange Act) of
     all shares of Common Stock and the Commitment Fee Warrants to be acquired
     by IP II in connection with the Equity Financings. See footnote 7 to the
     preceding "Certain Beneficial Owners" table for information concerning IP
     II.
 
(13) Includes (i) 5,600 shares of Common Stock owned directly, (ii) 880 shares
     of Common Stock owned indirectly as custodian for the benefit of his
     children under the New York Uniform Gift to Minors Act, and (iii) warrants
     to purchase Common Stock, consisting of the CentreLine Warrant to purchase
     579,356 shares and the warrants to purchase 395,128 shares held by IIA as
     agent for Centre Re. See the preceding "Certain Beneficial Owners" table
     and footnotes 10 and 12 thereto. Mr. Germain is an officer and director of
     both Centre Re and CentreLine. As such, he shares voting and/or dispositive
     control over such securities (subject to the termination of the agency
     relationship with IIA by Centre Re). Mr. Germain disclaims any beneficial
     interest in the CentreLine Warrant, the warrants held by IIA as agent for
     Centre Re, and the Common Stock issuable upon their exercise.
 
(14) Mr. Gruber, a director of the Company, is a Vice President of each of
     GenPar Inc. and GenPar (Bermuda) Ltd., the ultimate general partners of IP
     Delaware and IP Bermuda, respectively. IP Delaware beneficially owns
     1,375,547 shares of Common Stock and IP Bermuda beneficially owns 765,304
     shares of Common Stock. As adjusted for the Equity Financings, IP Delaware
     and IP Bermuda will beneficially own 3,361,928 and 1,571,137 shares of
     Common Stock, respectively, assuming no shares are purchased under the
     Standby Commitment. In the unlikely event that the Standby Commitment is
     exercised in full, then IP Delaware and IP Bermuda would beneficially own
     5,342,805 and 2,374,737 shares of Common Stock, respectively. See footnotes
     6 and 9 to the preceding "Certain Beneficial Owners" table. Mr. Gruber
     disclaims beneficial ownership (as defined in Rule 13d-3 under the Exchange
     Act) of all shares of Common Stock held by IP Delaware and IP Bermuda. See
     footnotes 6 and 9 to the preceding "Certain Beneficial Owners" table for
     information concerning such partnerships.
 
(15) Includes (i) 1,048,477 shares issuable upon exercise of warrants and (ii)
     190,006 shares issuable upon exercise of options, each of which are
     exercisable within 60 days of June 30, 1998. Also includes 92,786
     Restricted Stock grants, of which the restrictions have lapsed as to 20,653
     shares. As adjusted for the Equity Financings, includes (i) 1,048,477
     shares issuable upon exercise of warrants and (ii) 195,026 shares issuable
     upon exercise of options, each of which are exercisable within 60 days of
     October 30, 1998. Also includes 92,786 Restricted Stock grants, of which
     the restrictions have lapsed as to 20,653 shares. Refer to footnotes 10
     through 13 for information regarding beneficial interests in warrants.
 
                                       101
<PAGE>   104
 
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
TRANSACTIONS WITH IIA
 
     Messrs. Spass and Cooper, directors of the Company, are employees of IIA.
Mr. Spass is also an officer and director of IIA. Mr. Schwarberg, a director of
the Company, is a former employee of IIA. IIA was paid $250,000 by the Company
during each of fiscal 1997, 1996, and 1995 for investment banking and financial
consulting services. Such payments were made pursuant to a consulting agreement
entered into in 1992 that continues through the end of 1998.
 
TRANSACTIONS WITH AFFILIATES OF ZURICH, INCLUDING CENTRE RE
 
     Zurich, Centre Re, and CentreLine are affiliates of each other. Mr.
Germain, a director of the Company, is an officer and director of Centre Re and
CentreLine and an officer of Zurich.
 
  Financing Transactions
 
     In December 1997, Centre Reinsurance (Bermuda) Ltd. purchased $10.0 million
of the Trust Preferred Securities.
 
     Effective June 11, 1998, ZRNA advanced to SNIC $5.5 million of a
reinsurance commutation amount to be paid to SNIC in July 1998. SNIC used the
proceeds of the advance to purchase Common Stock from a director of the Company,
and other investments. See "-- Purchase of Common Stock by SNIC from Thomas J.
Jamieson, Director." Until the commutation occurs, ZRNA will receive interest on
the funds advanced at current short term borrowings rates.
 
     As of June 30, 1994, the Company completed a $20.0 million financing
transaction (the "1994 Transaction") with CentreLine and another affiliate of
Centre Re. The 1994 Transaction resulted in Centre Re's affiliate owning
preferred securities issued by an entity controlled by the Company with a 9.7%
annual rate of return payable semi-annually, and in the issuance of the
CentreLine Warrant. Because no cash dividends were paid on the preferred
securities, additional preferred securities were issued. In December 1997, the
Company applied the proceeds from the issuance and sale of the Trust Preferred
Securities and the underlying Senior Subordinated Notes to redeem all of the
approximately $26.6 million in such preferred securities then outstanding.
 
     In March 1992, the Company engaged in an $11.0 million financing
transaction with III in which the Company issued its 14.5% Notes and detachable
warrants to purchase Common Stock. Substantially all the 14.5% Notes were repaid
in 1994 but the III warrants remain outstanding. Centre Re is a limited partner
of III. Messrs. Spass, Schwarberg, and Cooper, directors of the Company, are
each the beneficial owner of less than one percent of the limited partnership
interests in III. In addition, Mr. Spass has voting power over all of the voting
capital stock of III's general partner. Messrs. Seaman and Johnson, each of whom
is an officer of the Company (Mr. Seaman is also a director), Joseph Wolonsky
(an officer who resigned from the Company in June 1997), Richard Hotchkiss (an
officer who retired from the Company in June 1996), and Edwin Wilson (an officer
who resigned from the Company in May 1995) each received warrants in this 1992
transaction as a result of their purchase of 14.5% Notes.
 
     In addition to its interest in the 14.5% Notes, Centre Re, because of its
limited partnership position in III, was further interested because, under the
terms of the CentreLine Warrant, the exercise price thereof would have been
reduced from $5.20 to $4.00 had the 14.5% Notes not been refinanced prior to
December 31, 1994. If that reduction had occurred, the aggregate exercise price
that CentreLine would have had to pay to exercise the CentreLine Warrant in full
would have decreased by $695,228.
 
     Under the terms of the warrants issued to III and the CentreLine Warrant,
Centre Re and CentreLine, among other things, have preemptive rights on the
issuance by the Company of equity securities, including rights or warrants to
purchase equity securities.
 
                                       102
<PAGE>   105
 
  Reinsurance
 
     Effective January 1, 1993, SNIC entered into an aggregate excess of loss
reinsurance contract with Centre Re under which SNIC was required to cede not
less than $15.0 million and not more than $20.0 million of claim and claim
adjustment expense to Centre Re with respect to any covered accident year.
During 1995 the Company paid $15.0 million to Centre Re for reinsurance
services. Effective January 1, 1996, the Company cancelled certain reinsurance
services provided by Centre Re. The Company accrued a $5.3 million charge
related to the cancellation of such reinsurance services.
 
     Effective January 1, 1994, SNIC entered into the ZRNA Quota-Share with
ZRNA, an affiliate of Zurich, which also applies to business written by SPCC
since April 1, 1997. Under the ZRNA Quota-Share, ZRNA may provide Superior
Pacific with an ALE facility, or, effective January 1, 1997, Superior Pacific
may write directly on policy forms of ZCIC, an affiliate of ZRNA (the "ZCIC
Underwriting Agreement"). The ceding rate under the contract was 20% for 1994,
and ZRNA and Superior Pacific mutually agreed to reduce the quota-share
participation to 5% for 1995 and 1996. Further, Superior Pacific receives ceding
commissions ranging between 22.5% and 24.5% for premiums ceded to ZRNA. The
purpose of the ceding commission is to cover Superior Pacific's cost of
acquiring new business and may be changed as a result of changes in market
conditions on a quarterly basis.
 
     Effective January 1, 1997, the terms of the ZRNA Quota-Share were amended.
Under the amended terms of the ZRNA Quota-Share, ZRNA increased its
participation from 5% of premiums written in 1996 to 6.5% in 1997. In exchange
for the increased participation, ZRNA will no longer receive a separate fee for
policies written on ALEs, but will receive 2% of premiums written on ZCIC
Underwriting Agreement policies only.
 
     Superior Pacific entered into a reinsurance transaction with Centre Re
effective June 30, 1997 under which Centre Re assumed $10.0 million of reserves
associated with claims open for future medical payments only from Superior
Pacific in consideration of $1 million in cash and the assignment of the rights
of Superior Pacific's contribution and subrogation recoveries during the term of
the contract. The contract is accounted for as a deposit, and no gain or loss
will be recognized until net cash payments from (or to) Centre Re are either
greater (or less) than Superior Pacific's $1.0 million premium.
 
  Claim Severity Management Program
 
     Beginning December 31, 1997 the Company entered into agreements with REM
and 3CM to provide the Claim Severity Management Program. The total cost of the
CSMP to the Company is expected to be approximately the same cost as the
Company's regular claim management functions over the expected five-year life of
the program. The Company believes its costs would have been similar had it not
determined to pursue the program. See "Superior National -- Business -- Claim
Severity Management Program."
 
  Acquisition and Equity Financings
 
     In connection with the Acquisition and Equity Financings, Zurich Centre
Group LLC will purchase BICO from the Company immediately after the Closing, and
will cause BICO to enter into an underwriting arrangement with the Company. See
"Acquisition of Business Insurance Group, Inc. -- Disposition of BICO." In
addition, an affiliate of Zurich will receive 205,000 of the Commitment Fee
Warrants to be issued to IP for providing the Standby Commitment, in exchange
for certain financing commitments provided to IP II. Also, due to their status
as holders of warrants, Centre Re and CentreLine will be issued Rights in the
Rights Offering or will have the opportunity to exercise preemptive rights
arising out of the IP Stock Issuance.
 
1996-97 TRANSACTIONS WITH IP AND LIMITATIONS ON RELATED PARTY CONTROL
 
     Messrs. Spass and Gruber, directors of the Company, are executive officers
of the ultimate general partner of each of IP Delaware and IP Bermuda. In April
1997, IP Delaware and IP Bermuda purchased an aggregate of 2,124,834 shares of
Common Stock at $7.53 per share, for an aggregate purchase price of $16.0
million, pursuant to the 1996 Stock Purchase Agreement among the Company, IP
Delaware, IP
 
                                       103
<PAGE>   106
 
Bermuda, TJS, and certain members of the Company's management. The Company used
the proceeds to fund, in part, its acquisition of Pac Rim. The price of the
Common Stock was determined based on its per share price as quoted on Nasdaq
during a certain period preceding the September 17, 1996 announcement of the Pac
Rim Transaction, and represented, in April 1997, a significant discount to the
then-current market price of the Common Stock. Mr. Gruber's election as a
director of the Company was effective upon the consummation of the acquisition
of Pac Rim. The Board of Directors (without Messrs. Gentz, Seaman, Spass,
Germain, and Cooper, who disclosed their conflict of interest, withdrew from the
discussion, and abstained from the vote) unanimously approved the 1996 Stock
Purchase Agreement. The negotiations of the 1996 Stock Purchase Agreement were
conducted by Mr. Pecchenino on behalf of the Company.
 
     The 1996 Stock Purchase Agreement contains, in addition to customary terms
and provisions, certain covenants by IP Delaware and IP Bermuda that shall
remain effective so long as IP Delaware and IP Bermuda and their "Associates"
beneficially own an aggregate of 15% or more of the Common Stock on a fully
diluted basis. As used herein and for purposes of the 1996 Stock Purchase
Agreement, "Associates" means each of CentreLine, Centre Re, III, IIA, and any
person or entity that controls, is under common control with, or is controlled
by IP Delaware and IP Bermuda or such persons or entities, and all individuals
who are officers, directors, or control persons of any such entities, including
IP Delaware and IP Bermuda. One such covenant, with certain limited exceptions,
prohibits IP Delaware and IP Bermuda or any of their Associates from acquiring
any additional shares of Common Stock, entering into a merger or business
combination involving the Company, participating in any solicitation of proxies,
or participating in any group with respect to the foregoing, without a two-third
majority vote of (i) the non-Associate and non-employee directors or (ii) the
Company's stockholders (excluding those shares held by IP Delaware and IP
Bermuda and their Associates and by executive officers having to report
transactions in Common Stock under securities laws). Other covenants provide
that IP Delaware and IP Bermuda and their Associates would not elect more than
five directors (or the highest number that is less than a majority of the Board
of Directors) and that IP Delaware and IP Bermuda and their Associates would not
transfer any of their shares except in certain types of specified transactions.
Further, other than with respect to the election of directors of the Company, IP
Delaware and IP Bermuda and their Associates agreed that, with respect to any
vote of the stockholders of the Company on a particular matter, if the aggregate
number of all shares that are voted in like manner by IP Delaware and IP Bermuda
and their Associates shall be greater than 35% of the total number of shares
voted, then those votes that exceed such 35% threshold shall be voted in the
same proportion as the other stockholders voted their shares with respect to
such matter.
 
     In connection with the 1996 Stock Purchase Agreement, the Company entered
into an agreement with all holders of the Company's outstanding warrants
pursuant to which such holders are prohibited from exercising their warrants
until April 2000 unless prior approval of the Board of Directors is obtained.
This restriction was implemented in order to reduce the risk that the Company
would undergo an ownership change for purposes of Section 382 of the Code and
thus be limited in its ability to use its NOLs. It is anticipated that this
restriction will be terminated effective at the Closing.
 
     The relevant provisions of the 1996 Stock Purchase Agreement will be
superseded by the Stock Purchase Agreement effective upon the Closing. See
"-- Participation by IP in the Equity Financings and Limitations on Related
Party Control."
 
     In addition, each of Messrs. Spass and Gruber are executive officers of
IPA. On April 11, 1997, IPA received a transaction fee from the Company of
$625,000 representing a percentage of all of the funds raised in connection with
the Pac Rim Transaction.
 
PURCHASE OF COMMON STOCK BY SNIC FROM THOMAS J. JAMIESON, DIRECTOR
 
     Effective June 11, 1998, SNIC agreed to purchase an aggregate of 245,000
shares of Common Stock from Thomas J. Jamieson, a director of the Company, and
Jaco Oil Company, an entity controlled by Mr. Jamieson. The price per share paid
was $21.00, for total consideration of $5,145,000. The Common Stock purchased by
SNIC is held as an investment. The Board of Directors, with disclosure of the
conflicts of
 
                                       104
<PAGE>   107
 
interest of Mr. Jamieson, and also Mr. Germain (due to ZRNA's advance of funds
discussed above), unanimously approved SNIC's purchase of Mr. Jamieson's Common
Stock.
 
PARTICIPATION BY IP IN THE EQUITY FINANCINGS AND LIMITATIONS ON RELATED PARTY
CONTROL
 
     On May 3, 1998, in connection with the Acquisition of BIG and in accordance
with the terms of the 1996 Stock Purchase Agreement, the non-Associate and
non-employee directors of the Company unanimously approved the IP Stock Issuance
and the Standby Commitment. Under the IP Stock Issuance, concurrently with the
Acquisition, IP Delaware, IP Bermuda, and IP II, collectively, will purchase an
aggregate of 5,611,940 shares of Common Stock at a price of $16.75, for a total
of $94.0 million. Under the Standby Commitment, IP has agreed to purchase up to
an additional 6,328,358 shares of Common Stock in an amount of shares of Common
Stock necessary to bring the total proceeds of the Equity Financings to $200.0
million. Any shares purchased pursuant to the Standby Commitment will be
purchased privately at the Stock Offering's Subscription Price of $16.75. The
purchase of shares by IP under each of the IP Stock Issuance and, if necessary,
the Standby Commitment will be governed by the Stock Purchase Agreement. The
terms of the Stock Purchase Agreement, and the $16.75 Subscription Price, were
negotiated by independent directors on behalf of the Company. Because the $16.75
price equals the Subscription Price in the Stock Offering, and the Subscription
Price was set with the intention of inducing participation by the Company's
stockholders, at the time the price was determined, and at the date hereof, the
$16.75 price represents a discount to the market price of the Common Stock.
 
     As in the 1996 Stock Purchase Agreement, the Stock Purchase Agreement
contains, in addition to customary terms and provisions, including customary
representations and warranties, covenants, and reciprocal indemnification
provisions, certain covenants by IP that shall remain effective so long as IP
and its Associates beneficially own an aggregate of 15% or more of the
outstanding Common Stock on a diluted basis. One such covenant, with certain
limited exceptions, prohibits IP or any of its Associates from acquiring any
additional shares of Common Stock, entering into a merger or business
combination involving the Company, participating in any solicitation of proxies,
or participating in any group with respect to any of the foregoing, without a
two-third majority vote of (i) the directors not affiliated with IP or its
Associates, or (ii) the stockholders (other than IP and its Associates). Other
covenants provide that IP and its Associates will not elect more than five
directors (or the highest number that is less than a majority of the Board of
Directors) and that IP will not transfer any of its shares except in certain
types of specified transactions. Further, other than with respect to the
election of directors of the Company, IP has agreed that, with respect to any
vote of the stockholders of the Company on a particular matter, if the aggregate
number of all shares that are voted in like manner by IP and its Associates
shall be greater than 35% of the total number of shares voted, then those votes
that exceed such 35% threshold shall be voted in the same proportion as the
other stockholders voted their shares with respect to such matter.
 
     The Company has agreed to pay $3.9 million to affiliates of IP as a
transaction fee upon consummation of the IP Stock Issuance.
 
     In consideration of its agreement to provide the Standby Commitment, IP
will receive a commitment fee from the Company, regardless of whether the Stock
Offering and Standby Commitment are consummated, consisting of warrants to
purchase 734,000 shares of Common Stock at $16.75 per share. IP will transfer
205,520 of these Commitment Fee Warrants to an entity affiliated with Zurich in
consideration of certain financing commitments to IP II.
 
MANAGEMENT PURCHASE OF EQUITY IN 1997
 
     In April 1997, 30 members of the Company's management and TJS, at the time
a 10% or greater stockholder of the Company, purchased an aggregate of 265,604
shares of Company Common Stock at $7.53 per share for an aggregate purchase
price of $2.0 million under the 1996 Stock Purchase Agreement. As is its policy,
IP Delaware and IP Bermuda requested that management participate with IP
Delaware and IP Bermuda in their purchase of Common Stock under the 1996 Stock
Purchase Agreement. Of the 2,390,438 shares of Common Stock issued under the
1996 Stock Purchase Agreement, 2,124,834 shares were acquired
 
                                       105
<PAGE>   108
 
by IP Delaware and IP Bermuda, as discussed above, 132,802 shares were acquired
by TJS; 25,234 were acquired by William Gentz (a director and the President and
Chief Executive Officer of the Company); 25,232 were acquired by J. Chris Seaman
(a director, an Executive Vice President and the Chief Financial Officer of the
Company); 9,296 were acquired by Joseph P. Wolonsky (who was then a Senior Vice
President of the Company, but who subsequently resigned from the Company as of
June 30, 1997); 9,296 were acquired by Karl O. Johnson (a Senior Vice President
of Superior Pacific); 9,296 were acquired by Douglas R. Roche (a Senior Vice
President of the Company); and 54,448 were acquired by other members of
management.
 
PARTICIPATION BY MANAGEMENT IN THE STOCK OFFERING
 
     The Board of Directors has approved the opportunity to participate in the
Stock Offering for employees and consultants of the Company holding vested and
unvested stock options and grants of shares of Restricted Stock, all previously
issued under the terms of equity incentive plans approved by the Company's
stockholders. The opportunity to participate will be effected through the
issuance of the same form of Right issued pursuant to the Rights Offering
(bearing an identical $16.75 Subscription Price), except that each employee or
consultant, in order to participate, will be required to agree that his or her
Rights are non-transferable. In addition, the Board of Directors has approved
making certain financing arrangements available to the participating employees
and consultants and the Company will have the power to dispose of Common Stock
and Common Stock equivalents pledged as collateral. Up to approximately 700,000
shares of Common Stock will be issued pursuant to the Employee Participation
portion of the Stock Offering. Messrs. Gentz and Seaman, who are employees and
directors of the Company, and all other executive officers of the Company, will
be eligible to purchase Common Stock through the Employee Participation. It is
expected that several of these participants will incur obligations in excess of
$60,000 to the Company as a result of financing arrangements provided as part of
the Employee Participation.
 
     Those directors and executive officers who own Common Stock (whether
acquired through open market purchases, in private transactions, or through the
exercise of options or the lapse of restrictions on Restricted Stock), will, by
virtue of such holdings, have the opportunity to purchase shares of Common Stock
in the Rights Offering. See "Security Ownership of Certain Beneficial Owners and
Management."
 
                                       106
<PAGE>   109
 
                         BUSINESS INSURANCE GROUP, INC.
 
                                  INFORMATION
 
                        SELECTED COMBINED FINANCIAL DATA
                                 (IN THOUSANDS)
 
     The following selected combined financial data are qualified by reference
to and should be read in conjunction with the combined financial statements and
notes thereto included elsewhere in this document. The selected combined
financial data set forth below as of December 31, 1997 and 1996 and for the
years ended December 31, 1997, 1996, and 1995 have been derived from the audited
financial statements of BIG included in this document. The selected combined
financial data set forth below as of December 31, 1995, 1994, and 1993 and for
the years ended December 31, 1994 and 1993 have been derived from unaudited
combined financial statements of BIG not included in this document. The selected
combined financial data as of and for the three months ended March 31, 1998 and
1997 have been derived from unaudited combined financial statements of BIG, but
include all adjustments, including normally occurring accruals, that BIG
considers necessary for a fair presentation of the results of operations for the
periods presented. The results of operations for the three months ended March
31, 1998 are not necessarily indicative of the results that may be expected for
BIG's fiscal year ending December 31, 1998.
 
<TABLE>
<CAPTION>
                                               THREE MONTHS
                                              ENDED MARCH 31,                       YEAR ENDED DECEMBER 31,
                                          -----------------------   --------------------------------------------------------
                                             1998         1997         1997         1996        1995       1994       1993
                                          ----------   ----------   ----------   ----------   --------   --------   --------
<S>                                       <C>          <C>          <C>          <C>          <C>        <C>        <C>
REVENUES:
  Gross premiums written................  $  153,920   $  165,617   $  668,906   $  641,113   $421,422   $364,466   $332,772
  Net premiums written..................     147,021      135,961      526,925      490,367    397,077    343,006    240,991
  Net premiums earned...................     139,612      121,388      515,272      480,828    390,974    340,097    233,341
  Net investment income (excluding
    capital gains and losses)...........       9,627        9,574       37,548       33,317     24,005     16,146     13,711
  Net capital gain (loss)...............         226           --        7,176          892      1,667        (61)     2,539
  Other income, net.....................         166          853        3,512        2,823        248         96         --
                                          ----------   ----------   ----------   ----------   --------   --------   --------
         Total revenues.................     149,631      131,815      563,508      517,860    416,894    356,278    249,591
EXPENSES:
  Claim and claim adjustment expenses,
    net of reinsurance..................     114,286       83,967      443,204      381,897    245,522    218,240    169,828
  Underwriting and general and
    administrative expenses.............      42,132       32,105      168,187      107,640    114,918     75,364     49,262
  Policyholder dividends................         120           --          793       (5,250)     5,494     11,176     24,487
  Goodwill amortization.................         309           68        1,262          909        256        146        175
  Interest expense......................       2,359        2,128        8,326        4,330         --         --        946
                                          ----------   ----------   ----------   ----------   --------   --------   --------
         Total expenses.................     159,206      118,268      621,772      489,526    366,190    304,926    244,698
  Income from continuing operations.....      (9,575)      13,547      (58,264)      28,334     50,704     51,352      4,893
  Income tax benefit (expense)..........       5,394       (2,746)      28,847       (2,934)   (12,952)   (13,832)     1,461
                                          ----------   ----------   ----------   ----------   --------   --------   --------
         Net income (loss)..............  $   (4,181)  $   10,801   $  (29,417)  $   25,400   $ 37,752   $ 37,520   $  6,354
                                          ==========   ==========   ==========   ==========   ========   ========   ========
GAAP RATIOS:
  Claim and claim adjustment expense
    ratio...............................        81.9%        69.2%        86.0%        79.4%      62.8%      64.2%      72.8%
  Expense ratio.........................        30.3%        26.4%        32.8%        21.3%      30.8%      25.4%      31.6%
                                          ----------   ----------   ----------   ----------   --------   --------   --------
  Continuing operations combined ratios,
    net of reinsurance..................       112.2%        95.6%       118.8%       100.7%      93.6%      89.6%     104.4%
                                          ==========   ==========   ==========   ==========   ========   ========   ========
FINANCIAL POSITION:
  Total cash and investments
    Carrying value......................  $  791,826   $  764,521   $  763,171   $  754,652   $529,515   $419,943   $362,133
    Market value........................     791,986      764,296      763,339      754,745    529,650    419,053    370,437
  Total assets..........................   1,205,022    1,119,383    1,222,406    1,093,773    749,104    627,855    602,023
  Long-term debt........................     121,750      123,750      121,750      128,250         --         --         --
  Claim and claim adjustment expense
    liability...........................     713,473      611,105      728,421      590,595    443,600    412,666    386,194
  Total liabilities.....................     958,001      841,740      970,060      825,881    508,214    479,543    466,139
  Net stockholder's equity..............     247,021      277,643      252,346      267,892    240,890    148,312    135,884
</TABLE>
 
                                       107
<PAGE>   110
 
                         BUSINESS INSURANCE GROUP, INC.
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion and analysis provides information that BIG's
management believes to be relevant for an understanding of BIG's combined
results of operations and financial condition. The discussion should be read in
conjunction with the consolidated financial statements and the notes thereto.
 
THREE MONTHS ENDED MARCH 31, 1998 AS COMPARED TO THREE MONTHS ENDED MARCH 31,
1997
 
     Gross premiums written for the quarter ended March 31, 1998 and 1997 were
$153.9 million and $165.6 million, respectively. The $11.7 million decline in
gross premiums written was the result of a $15.0 million decline in gross
premiums written in the California marketplace. The premium reduction in the
California marketplace was precipitated by an underwriting and pricing criteria
change implemented effective January 1, 1998. The decrease in gross premiums
written in California was somewhat offset by a $3.3 million increase in gross
premiums written outside of California. Despite BIG's decline in gross premiums
written, its net premiums written increased $11.1 million. The increase in net
premiums written for the quarter ended March 31, 1998 was the result of the
expiration of an aggregate excess of loss reinsurance treaty on January 1, 1998,
and the cancellation of a quota-share reinsurance treaty on July 1, 1997. During
the quarter ended March 31, 1997, $15.0 million of premiums were ceded under the
aggregate excess of loss reinsurance treaty, and $11.3 million of premiums were
ceded under the 7.5% quota-share reinsurance treaty. As neither the aggregate
excess of loss reinsurance treaty or the quota-share reinsurance treaty were in
force during the quarter ended March 31, 1998, no such comparable cession
occurred.
 
     Net claim and claim adjustment expense increased $30.3 million or 36.1% to
$114.3 million for the quarter ended March 31, 1998, as compared to $84.0
million for the same period in 1997. The net claim and claim adjustment expense
ratio increased to 81.9% for the quarter ended March 31, 1998, from 69.2% for
the quarter ended March 31, 1997. The increase in claim and claim adjustment
expenses and expense ratio was primarily due to two factors. The first factor
was the expiration of BIG's aggregate excess of loss reinsurance treaty on
January 1, 1998. During the quarter ended March 31, 1997, BIG ceded $18.6
million of claims and claim adjustment expenses, while no comparable cession
occurred during the quarter ended March 31, 1998. The second factor is the
continued increase in the severity of BIG's California workers' compensation
claims. The increase in the California workers' compensation claim severity is
believed by BIG's management to be caused by two principal factors: first, legal
decisions in late 1996 that permit injured workers to provide greater direction
in their treatments; and second, increased claims and legal costs associated
with a change in the permanent disability rating schedules effective April 1997.
 
     Underwriting and general and administrative expenses, excluding
policyholder dividends, increased $7.6 million or 24.1% to $39.1 million for the
quarter ended March 31, 1998, as compared to the same period in 1997. The
expense increase is attributable to a $3.1 million decrease in ceding
commissions, which offset the expenses, as a result of the July 1, 1997
cancellation of the quota-share reinsurance treaty. The remaining $4.5 million
expense variation is due to increased general and administrative expenses in
order to provide policyholder services related to the 1996 and 1997 premium
growth of BIG's non-California operations and the associated cost of supporting
these operations.
 
     There were no material policyholder dividends recorded in either period.
 
     Net investment income was relatively unchanged between the first quarter of
1998 and the first quarter of 1997. Although BIG experienced an increase in
average assets available for investment from the first quarter of 1997 to the
first quarter of 1998, the increase in investments held was offset by an overall
decline in bond yields.
 
     Interest expense increased $0.2 million between the first quarter of 1998
and the first quarter of 1997 on reduced average principal balance. The
reduction in principal was offset during the first quarter of 1998 by a higher
interest rate charged BIG by FHC on its credit facility (the "FHC Credit
Facility"). FHC increased BIG's interest rate to 7.75% from 6.75% in 1997,
effective January 1, 1998.
                                       108
<PAGE>   111
 
YEAR ENDED DECEMBER 31, 1997 AS COMPARED TO YEAR ENDED DECEMBER 31, 1996
 
     Gross premiums written for the years ended December 31, 1997 and 1996 were
$668.9 million and $641.1 million, respectively. This increase in gross premiums
written represents an increase of $27.8 million or 4.3% for the 1997 calendar
year as compared to the 1996 calendar year. Gross premiums written relating to
states other than California increased $42.2 million or 28.8% to $188.5 million
in 1997, as BIG experienced premium growth through BICO's nationwide operations.
Offsetting this increase was a decline of $14.4 million, or 2.9% of premiums
written in California. The 2.9% decrease reflects the continued price
competition in the California workers' compensation insurance marketplace since
the advent of open rating in January 1995. Net premiums written increased $36.5
million or 7.4% to $526.9 million for the year ended December 31, 1997, as
compared to the year ended December 31, 1996. The increase in net premiums
reflects the increase in gross premiums and a decrease in the quota-share ceding
percentage from 30% for the second six months of 1996 to 7.5% for the first six
months of 1997. The decrease in the quota-share ceding percentage resulted in
$68.3 million in additional net premiums. Partially offsetting these increases
is a reinsurance charge of $93.5 million related to an aggregate excess of loss
treaty purchased by BIG in 1997. Net premiums earned increased $34.5 million or
7.2% to $515.3 million for the year ended December 31, 1997, as compared to the
year ended December 31, 1996.
 
     Net claim and claim adjustment expenses increased $61.3 million or 16.1% to
$443.2 million for the year ended December 31, 1997, as compared to $381.9
million for the year ended December 31, 1996. This increase is primarily
attributable to the increase in the claim and claim adjustment expense ratio to
86.0% in 1997 as compared to 79.4% in 1996. The 1997 increase is primarily due
to an increase in the estimates for accident year 1996 and prior loss and loss
adjustment expenses incurred, which estimates were increased by $75.2 million in
1997. The cause of the increase in the accident year 1996 and prior estimates
was in part due, BIG's management believes, to a 1996 court ruling that gave the
treating physician expanded authority in determining the level of disability of
the injured worker. The impact of this court ruling is believed to be the
primary cause of increased claim severity. In addition, changes to the
California permanent disability rating schedules in April 1997 adversely
affected average claim severity in California, thereby contributing to the
higher 1997 accident year claim and claim adjustment cost expense ratio compared
to 1996.
 
     Underwriting and general and administrative expenses, excluding
policyholder dividends, increased $60.6 million or 56.3% to $168.2 million for
the year ended December 31, 1997, as compared to the same period in 1996. The
underwriting expense ratio was 32.6% in calendar year 1997 as compared to 22.4%
in 1996. The expense increase is attributable to a $33.5 million decrease in
ceding commissions as a result of the reduced quota-share reinsurance ceding
percentage in 1997, and approximately $20 million of the expense increase
resulted from the growth in BIG's non-California operations as BIG fully
developed its expense infrastructure during 1997 to support the higher in force
premium levels for policies issued during 1995 and 1996.
 
     Policyholder dividends increased to $0.8 million for the year ended
December 31, 1997, as compared to a credit to expense of $5.2 million for the
same period in 1996. The increase primarily resulted from BIG's issuing
participating workers' compensation insurance policies in a limited number of
states where dividends play an important role in the marketing of policies, and
BIG's reduction of its California policyholder dividend liability by $6.0
million in 1996.
 
     Net investment income increased $4.2 million or 12.6% to $37.5 million for
the year ended December 31, 1997, as compared to 1996. BIG's average invested
assets increased to $758.9 million in 1997 from $642.1 million in 1996. The
investment income increase was due to higher investable assets as BIG borrowed
$130.0 million in mid-1996 under the FHC Credit Facility and contributed $120.0
million of the proceeds to the statutory policyholders' surplus of CalComp and
BICO.
 
     Net capital gains increased $6.3 million to $7.2 million for the year ended
December 31, 1997, from $0.9 million for 1996. The increase is due to BIG's
decision to take advantage of decreases in long-term interest rates throughout
1997 and increases in the market value of its bond portfolio. BIG sold $350.9
million of available-for-sale bonds in 1997, primarily during the fourth quarter
of 1997, realizing investment gains of $7.2 million.
                                       109
<PAGE>   112
 
     Interest expense increased 92.3% to $8.3 million for the year ended
December 31, 1997, as compared to the year ended December 31, 1996. The higher
interest expense is primarily due to incurring a full year of interest expense
on funds borrowed in mid-1996 from the FHC Credit Facility.
 
YEAR ENDED DECEMBER 31, 1996 AS COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
     Gross premiums written increased $219.7 million or 52.1% to $641.1 million
in 1996 from 1995. In California, BIG's premiums increased $102.2 million or
26.0% to $494.7 million. Additionally, in 1996, BIG experienced very strong
growth in its non-California operations. BIG's non-California gross premiums
written increased $117.5 million to $146.4 million. This level of growth was
consistent with BIG's change in its strategic plan regarding geographic
diversification. Net premium written increased $93.3 million or 23.5% to $490.4
million, reflecting the increase in gross premium written, partially off-set by
an increase in premium ceded to reinsurers. The increase in premium ceded was
the result of BIG entering into a 30% quota-share treaty effective July 1, 1996.
Net premium earned increased $89.8 million or 23.0% to $480.8 million in 1996
from 1995. The change in net premium earned is consistent with the changes
affecting net premium written.
 
     Net claim and claim adjustment expenses increased $136.4 million or 55.6%
to $381.9 million in 1996 from $245.5 million for the year ended December 31,
1995. The increase in claim and claim adjustment expenses occurred primarily due
to BIG's growth in gross premium written and a $20.1 reserve strengthening
recorded in 1996 for accident year 1995. However, BIG recorded a $26.9 million
decrease in claim and claim adjustment expense in 1995 for accident years 1994
and prior.
 
     Underwriting and general and administrative expenses, excluding
policyholder dividends, decreased $7.3 million or 6.4% to $107.6 million in 1996
as compared to $114.9 million in 1995. The underwriting expense ratio decreased
to 22.4% in calendar year 1996 as compared to 29.4% in 1995. The lower
underwriting and general and administrative expenses was due to ceding
commissions of $28.7 million recorded in 1996 under the quota-share reinsurance
treaty effective July 1, 1996. The other reason for the lower expense ratio was
due to an increase in gross premiums earned in states outside California, as BIG
did not have its operating infrastructure fully in place until 1997 to support
the higher premium volume of non-California policies issued in 1995 and 1996.
 
     Policyholder dividend expense decreased $10.7 million for the year ended
1996 as compared to the same period in 1995. This decrease is due primarily to
the fact that in California prior to open rating, policyholder dividends served
both as an economic incentive to employers for safe operations and as a means of
price differentiation. As a result of consumers' preference for the lowest price
at a policy's inception under open rating, dividends are no longer a significant
factor. Therefore, BIG discontinued its payment of dividends in the state of
California and reduced its outstanding policyholder dividend liability by $6.0
million in 1996.
 
     Net investment income increased $9.3 million or 38.8% to $33.3 million for
the year ended December 31, 1996 as compared to 1995. BIG's average invested
assets increased to $642.1 million in 1996 from $474.7 million in 1995. The
increased investment income in 1996 is due to higher invested assets produced
from net cash flows from operations during the year of $104.8 million and funds
borrowed under the FHC Credit Facility in May and August of 1996, totalling a
net amount of $128.2 million.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     BIG's cash inflows are generated from cash collected from policies sold,
investment income generated from its exiting portfolio, and sales and maturities
of investments. BIG's cash outflows consist primarily of payments for
policyholders' claims, operating expenses, and debt service. For its insurance
operations, BIG must have available cash and liquid assets to meet obligations
to policyholders and claimants in accordance with contractual obligations in
addition to meeting ordinary operating costs. Absent adverse material changes in
the workers' compensation insurance market, management believes BIG's present
cash resources are sufficient to meet its needs for the foreseeable future. BIG
believes that it has adequate short-term investments and readily marketable
investment-grade securities to cover both claim payments and expenses.
 
                                       110
<PAGE>   113
 
     During the year ended December 31, 1997, operating activities provided the
Company with $7.9 million of cash versus $104.8 million for the year ended
December 31, 1996. The decrease in cash generation is due primarily to
reinsurance payments of $93.5 million under an aggregate excess of loss
reinsurance treaty that commenced on January 1, 1997. At December 31, 1997, BIG
had total cash and cash equivalents of $98.1 million in an investable asset
portfolio of $763.2 million. Of the fixed income portfolio, 76.9% was rated "AA"
or better and 95.7% was rated "A" or better.
 
     BIG generated $65.7 million in cash from investing activities during the
year ended December 31, 1997, as compared to a use of cash of $237.2 million in
1996. The Company's cash and cash equivalents position increased in 1997 as a
result of the sales of bonds available for sale as BIG repositioned its
portfolio during the fourth quarter to take advantage of a decline in long-term
interest rates.
 
     BIG used $1.3 million in financing activities in 1997 with the repayment of
$6.5 million of debt to FHS and the excess of book value over net asset acquired
related to the purchase of Christania General Insurance Corporation (renamed
Commercial Compensation Insurance Company), offset by a $10.8 million dividend
received from BIG's non-insurance subsidiaries. The non-insurance subsidiaries
are not part of the Acquisition transaction with Superior National and will
remain subsidiaries of FHS.
 
     BIG is party to several leases principally associated with BIG's home and
regional office space. Such leases contain provisions for scheduled lease
charges and escalations in base rent over the lease term. BIG's minimum lease
commitment with respect to these leases in 1998 is $8.9 million. These leases
expire between 1998 and 2005.
 
     The effect of inflation on the revenues and net income of BIG during the
years ended December 31, 1997, 1996, and 1995 was not significant.
 
PRIMARY DIFFERENCES BETWEEN GAAP AND SAP
 
     The financial statements contained herein for BIG have been prepared in
conformity with GAAP as opposed to SAP prescribed or permitted for insurance
companies by regulatory authorities. For a discussion of the differences between
GAAP and SAP, see "Superior National -- Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Primary Differences Between
GAAP and SAP."
 
YEAR 2000 STRATEGY
 
     A significant percentage of the software that runs most of the computers in
the United States and the rest of the world relies on two-digit date codes to
perform computations and decision making functions. For insurance policies with
an expiration date of January 1, 2000 or later, these computer programs may fail
from an inability to interpret date codes properly, misinterpreting "00" as the
year 1900 rather than 2000. BIG is currently upgrading its computer software to
address the Year 2000 problem, which it believes will be completed by August
1998, prior to issuing policies with a Year 2000 expiration date. Upon the
completion of such upgrade, BIG believes that its computer systems will be fully
Year 2000 compliant; there can be no assurance, however, that BIG will complete
the computer upgrade before issuing policies with a Year 2000 expiration date or
that such upgrade will successfully prevent any Year 2000 problems from
occurring. BIG does not expect the cost associated with its Year 2000 project to
be material.
 
                                       111
<PAGE>   114
 
SUPPLEMENTARY DATA
 
     Summarized quarterly financial data for 1998, 1997, and 1996 is as follows:
 
<TABLE>
<CAPTION>
                                                                THREE MONTHS ENDED
                                                  ----------------------------------------------
                                                  MARCH 31,    JUNE 30,    SEPT. 30,    DEC. 31,
                                                  ---------    --------    ---------    --------
                                                                  (IN THOUSANDS)
<S>                                               <C>          <C>         <C>          <C>
1998
Earned premiums.................................  $139,612     $     --    $     --     $     --
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items.........................................  $ (9,575)    $     --    $     --     $     --
Net income (loss)...............................  $ (4,181)    $     --    $     --     $     --
1997
Earned premiums.................................  $121,388     $124,894    $127,084     $141,906
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items.........................................  $ 13,547     $  5,017    $ 10,571     $(87,399)
Net income (loss)...............................  $ 10,801     $  4,934    $  8,919     $(54,071)
1996
Earned premiums.................................  $126,212     $140,288    $109,475     $104,853
Income before income taxes, preferred securities
  dividends and accretion and extraordinary
  items.........................................  $ 19,718     $ 21,859    $ 23,251     $(36,494)
Net income (loss)...............................  $ 13,830     $ 15,877    $ 17,344     $(21,651)
</TABLE>
 
NEW ACCOUNTING STANDARDS
 
     The FASB has recently adopted a number of new standards. The impact of
these new standards did not have a material effect on BIG's results. BIG has not
yet determined the impact of SFAS 130. For a discussion of the new standards,
see "Superior National -- Management's Discussion and Analysis of Financial
Condition and Results of Operations -- New Accounting Standards."
 
                                       112
<PAGE>   115
 
                         BUSINESS INSURANCE GROUP, INC.
 
                                    BUSINESS
 
OVERVIEW
 
     BIG, a wholly owned indirect subsidiary of FHS, is an insurance holding
company that writes workers' compensation and group health insurance,
principally in California, with regional and branch operations throughout the
continental United States. BIG has four insurance subsidiaries: CalComp, BICO,
CBIC, and CCIC. Some members of BIG's current senior management team established
BIG, formerly Business Insurance Corporation, in 1987, and in 1988 purchased
CalComp from Hanover Insurance Company ("Hanover"). BIG was subsequently
acquired in 1993 by FHC. Based on available data on 1997 direct written premium,
BIG ranks as the largest private sector writer of workers' compensation
insurance in California.
 
     BIG currently conducts its insurance operations through its four wholly
owned subsidiaries. CalComp, a specialty workers' compensation carrier writing
business primarily in California, is the largest of these and is licensed in 12
states. BICO, acquired in February 1995, is licensed in 49 states and the
District of Columbia and writes workers' compensation insurance primarily in
states other than California. CBIC was acquired in January 1995 and writes
single source workers' compensation and employee group health insurance in
California. CCIC is licensed in 40 states and was acquired in May 1997 to create
a broader range of products and pricing plans.
 
     Of the $647.4 million of BIG's direct written premium in 1997, $465.0
million was written in California; $20.4 million, $19.4 million, $18.9 million,
$16.9 million, and $13.4 million in direct premium was written in Georgia,
Texas, Louisiana, Colorado, and Oregon, respectively; and the remaining 14.4% of
direct premium was written in other states. The premium outside of California
primarily was written through BICO.
 
MARKETING
 
     BIG has developed an extensive nationwide presence through 16 regional
offices and 21 branch offices, with eight regional offices and two branch
offices in California. BIG has historically expanded into a new region by
establishing a branch office with a few employees specializing in marketing,
underwriting, and loss control. As the branch office grew and there were
demonstrated needs for further infrastructure to support growth, resources were
added and certain branches became regional offices. Regional offices have
additional local management and support the growth of additional branch offices.
BIG's expanding presence outside of California is indicated by the growth in
direct written premium outside of California from $27.1 million in 1995 to
$182.4 million in 1997. As of June 1, 1998, BIG employed a staff of
approximately 270 outside California.
 
     BIG markets its products through a distribution network of approximately
1,700 producers. Of these, over 1,300 are located in California, and
approximately 400 are outside California.
 
     BIG markets its policies through major national brokers as well as through
small- to medium-sized producers focusing on regional customers. The top ten
producers accounted for 18.5% of direct written premium in fiscal 1997, and the
top 50 producers accounted for 42.9%. Of the top 50 producers for BIG in
California and Arizona, 8 are also among the top 50 producers for Superior
National.
 
     BIG enters into brokerage contracts with producers as opposed to agency
relationships. Certain states require that all appointments be made through an
agency contract. No agent in these states has the ability to bind BIG to issue
policies, and the same basic contract that is used for brokerage appointments is
also used for agency appointments. BIG also has relationships with certain other
producers ("Program Administrators") that have the ability to bind BIG to issue
coverage to a customer based on its program administration agreement with BIG.
These agreements call for override commissions to be paid to the Program
Administrators and most of the Program Administrators' agreements provide for
direct premium billing to policyholders. These agreements may be cancelled by
BIG if the Program Administrator violates the terms of the agreement with no
recourse whatsoever. All new and renewal policyholder applications (other than
those handled under a program administration agreement) must be submitted to BIG
for approval. BIG is not committed to accept a
                                       113
<PAGE>   116
 
fixed portion of any producer's business, but must accept all policies written
consistent with the underwriting and pricing templates of the program
administration agreements. BIG also has in force a variety of override,
contingency, and profit-sharing commission agreements with certain of its
producers in order to encourage a certain level of pricing and profitability.
 
     CalComp focuses on the California workers' compensation market. The
regional offices and BIG's national account marketing group focus on accounts
with estimated annual premiums ("EAP") over $25,000. Overall, BIG's average
policy size of $16,165 generated $562.3 million in EAP as of December 31, 1997.
Within California, the average policy size of $15,708 generated $404.6 million
in EAP, and outside of California the average policy size was $17,471 and
generated an EAP of $157.7 million. Policies with over $25,000 in EAP at
inception as of March 31, 1998 accounted for 73.7% of BIG's combined EAP.
 
     Producer commissions are generally determined by negotiation and are
dependent on the size and profit potential of the producer's accounts. BIG's
average direct commission rate was 9.5% for the year ended December 31, 1997,
11.0% for the year ended December 31, 1996, and 14.0% for the year ended
December 31, 1995. The reduction in the average direct commission rate from 1995
to 1996 was due to policies issued with an expiration date after January 1,
1995, in which higher commissions were paid to brokers in an effort to increase
market share to position themselves for the start of open rating on January 1,
1995. The reduction from 1996 to 1997 was due to an increase in BIG's national
business, which has a lower commission rate than California, lowering the
average direct commission rate.
 
UNDERWRITING
 
     BIG's workers' compensation underwriting is conducted almost entirely
through regional and branch offices nationwide. As a policy matter, BIG does not
write policies in employment classifications that represent historically higher
risk exposure, particularly those risks in the classifications generally
considered specialized workers' compensation insurance.
 
     For new and renewal policies effective on or after January 1, 1998, BIG
filed a rate increase in California. In March 1998, BIG management implemented a
program to increase rates on policies with unacceptable hazard grade and loss
ratio combinations. In the first and the second quarters of 1998, BIG
experienced a substantial reduction in premium due to the non-renewal of these
accounts. Reduction in premium related in part to changes in pricing.
Additionally, a reduction by A.M. Best of BIG's rating and the uncertainty
related to the sale of BIG by FHS contributed to the loss of business in 1998.
See " -- Ratings." Following the execution of the Acquisition Agreement, BIG
modified the March 1998 pricing program to be more competitive and to stem the
loss of premium. BIG also implemented the Quota-Share Arrangement effective May
1, 1998.
 
     BIG offers a number of alternative pricing plans for its customers,
including retrospectively rated policies, deductible plans, contingent surcharge
plans, and, only outside of California, dividend plans for customers.
Retrospective rating results in a return of premium to customers if certain loss
criteria are achieved. Deductible plans offer customers lower premiums in
exchange for the customers' participating in the first layer of losses.
Contingent surcharge plans add additional premium at specified dates after
expiration of the policy if the account exceeds an expected loss ratio. The
surcharge premium is subject to return if the loss ratio is reduced in future
periods.
 
     In many states, workers' compensation insurers issue participating
policies, which allow the insurer to declare and pay dividends to a policyholder
after expiration of the policy. Although policyholder dividends are no longer an
important component of the workers' compensation insurance marketplace in
California, they remain a significant tool for BIG to obtain and retain business
outside of California. In 1997, BIG paid $1.2 million in policyholder dividends,
and participating policies represented 2.1% of BIG's workers' compensation
policies overall, 8.2% outside of California. Policyholder dividends may be
computed as a flat rebate to the policyholder upon achievement of certain loss
ratios or expense factors, or, more commonly, reflect an amount that is not
guaranteed but is determined based on the insurer's view of a number of related
factors including loss ratio, the class of business, geographic location and
premium payment history of the
 
                                       114
<PAGE>   117
 
policyholder, risk and expense factors, competition in the marketplace, and the
overall financial condition of the insurer.
 
LOSS CONTROL
 
     BIG has a loss control department that seeks to control claims before they
occur, and loss control has formed a key component of BIG's business strategy.
BIG has specialized employer and employee safety management schools that are
unique in the industry. In addition, BIG utilizes comprehensive reports to track
loss control results and key factors in reducing claims. The loss control unit
had approximately 100 employees at June 1, 1998. BIG requires that every
regional and branch office be staffed with a loss control specialist from the
time it is established. The employer safety management school involves
approximately 28 employees, and all but two of these specialists are based in
California.
 
CLAIM MANAGEMENT
 
     BIG's claims department is organized on the basis of claim supervisory
units consisting of four to six claims examiners, each responsible for 150 - 170
claims; one claims assistant for each claims examiner; one file clerk for each
supervisory unit; and one data entry clerk/processor for each supervisory unit.
A vocational rehabilitation specialist is utilized in each unit to evaluate
vocational rehabilitation plans and attend formal and informal rehabilitation
planning conferences. Claims examiners are responsible for vocational
rehabilitation plan approval and statutory filings. Each claims unit also
employs a specialist to handle settlement negotiations. BIG's claims handling
policy includes contacting the injured worker within 24 hours of notification of
the injury, obtaining a recorded statement during the initial claimant contact,
and maintaining monthly contact while the injured worker is receiving total
disability payments. BIG uses third party administrators for the handling of
claims and loss control services that are associated with captive programs,
representing approximately 5% of BIG's EAP as of December 31, 1997.
 
     Since 1992, BIG has maintained a Special Investigations Unit ("SIU") to
handle potentially fraudulent claims. The group consists of former law
enforcement officers and medical and claims experts, and provides training to
employees and customers in areas of fraud recognition, trends, and legal
updates. Through 1997, the SIU was responsible for 241 referrals to insurance
departments and district attorneys, 80 criminal cases filed, 23 arrests, and 14
convictions.
 
                                       115
<PAGE>   118
 
CLAIM AND CLAIM ADJUSTMENT EXPENSE RESERVES
 
     BIG's claim and claim adjustment expense reserves are established in a
manner similar to Superior National's. See "Superior National -- Business" and
"Risk Factors -- Uncertainty Associated with Estimating Reserves for Unpaid
Claim and Claim Adjustment Expense."
 
     The following table provides a reconciliation of the beginning and ending
claim and claim adjustment expense reserves of BIG for each of the years in the
three-year period ended December 31, 1997, computed in accordance with GAAP.
 
       RECONCILIATION OF LIABILITY FOR CLAIM AND CLAIM ADJUSTMENT EXPENSE
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,
                                                          -----------------------------------
                                                            1997         1996         1995
                                                          ---------    ---------    ---------
                                                                    (IN THOUSANDS)
<S>                                                       <C>          <C>          <C>
Beginning reserve, gross of reinsurance.................  $ 590,595    $ 443,600    $ 412,666
Less: Reinsurance recoverable on unpaid losses..........   (121,170)     (76,154)     (90,326)
                                                          ---------    ---------    ---------
Beginning reserve, net of reinsurance...................    469,425      367,446      322,340
Provision for net claim and claim adjustment expenses:
  For claims occurring in current year..................    367,971      361,750      272,388
  For claims occurring in prior years...................     75,233       20,147      (26,866)
                                                          ---------    ---------    ---------
  Total claim and claim adjustment expenses.............    443,204      381,897      245,522
                                                          ---------    ---------    ---------
Payments for net claim and claim adjustment expense:
  Attributable to insured events incurred in current
     year...............................................   (135,202)    (106,757)     (71,899)
  Attributable to insured events incurred in prior
     years..............................................   (255,877)    (173,161)    (128,517)
                                                          ---------    ---------    ---------
  Total claim and claim adjustment expense payments.....   (391,079)    (279,918)    (200,416)
                                                          ---------    ---------    ---------
Ending reserves, net of reinsurance.....................    521,550      469,425      367,446
Reinsurance recoverable on unpaid losses................    206,871      121,170       76,154
                                                          ---------    ---------    ---------
Ending reserves, gross of reinsurance...................  $ 728,421    $ 590,595    $ 443,600
                                                          =========    =========    =========
</TABLE>
 
     In 1997, claim and claim adjustment expenses incurred in prior years
increased by $75.2 million due primarily to unfavorable development of the 1996
and 1995 accident years. The cause of the increase in the accident year 1996 and
prior estimates was in part due, BIG's management believes, to a 1996 court
ruling that gave the treating physician expanded authority in determining the
level of disability of the injured worker. The impact of this court ruling is
believed to be the primary cause of increased claim severity. In addition,
changes to the California permanent disability rating schedules in April 1997
adversely affected average claim severity in California, thereby contributing to
the higher 1997 accident claim and claim adjustment cost expense ratio compared
to 1996.
 
     In 1996, BIG experienced adverse loss development related to accident year
1995. The increases for prior accident year claim and claim adjustment expense
reserves is primarily attributable to increases in BIG's average claim severity.
On a per claim basis, the average gross case loss reserve for the 1995 accident
year increased 55.2% from 1995 to 1996, and the average gross case loss paid for
the 1995 accident year increased 37.8% from 1995 to 1996.
 
     In 1995, BIG experienced favorable loss development on net claim and claim
adjustment expense reserves estimated on December 31, 1994. The decrease in
prior accident year claim and claim adjustment expense reserves is primarily
attributable to reductions in the estimates for the 1993 and 1994 accident
years. The favorable impact of the reforms passed by the California State
Legislature in 1993 related to fraudulent claims, as well as the impact from
BIG's continued use of managed care techniques, including network utilization
and medical case management, also contributed to the reduction in the prior year
loss estimates.
 
                                       116
<PAGE>   119
 
     The following table discloses the development of net workers' compensation
claim and claim adjustment expense reserves of BIG from December 31, 1987
through December 31, 1997.
 
         ANALYSIS OF NET CLAIM AND CLAIM ADJUSTMENT EXPENSE DEVELOPMENT
<TABLE>
<CAPTION>
                                                        YEAR ENDED DECEMBER 31,
                           ----------------------------------------------------------------------------------
                            1987      1988      1989       1990       1991       1992       1993       1994
                           -------   -------   -------   --------   --------   --------   --------   --------
                                                             (IN THOUSANDS)
<S>                        <C>       <C>       <C>       <C>        <C>        <C>        <C>        <C>
Liability for unpaid
  losses and loss
  adjustment expenses....  $53,170   $55,089   $76,296   $158,268   $206,993   $219,464   $268,191   $322,394
Paid (cumulative) as of:
  One year later.........   14,186    11,649    20,541     59,110    103,361    106,693    115,189    129,284
  Two years later........   21,998    20,780    36,151    106,334    167,932    191,397    184,304    204,245
  Three years later......   27,849    28,389    44,665    130,826    211,087    233,537    214,676    243,210
  Four years later.......   33,527    31,492    50,240    146,186    233,168    249,012    226,187
  Five years later.......   35,630    34,015    53,896    154,514    241,693    252,921
  Six years later........   37,448    35,975    56,301    161,152    244,308
  Seven years later......   39,121    37,374    58,577    164,606
  Eight years later......   40,346    38,970    59,858
  Nine years later.......   41,854    39,780
  Ten years later........   42,637
Liability re-estimated as
  of:
  One year later.........   53,321    51,147    75,988    160,141    218,747    251,012    262,032    295,856
  Two years later........   51,382    51,991    65,376    162,040    242,231    257,134    256,132    270,293
  Three years later......   54,349    43,651    61,098    172,981    242,533    262,582    250,238    296,016
  Four years later.......   47,241    41,513    66,135    172,269    245,877    268,031    254,791
  Five years later.......   46,116    44,701    66,174    173,581    249,220    270,478
  Six years later........   47,011    45,364    66,569    174,892    257,332
  Seven years later......   47,928    45,452    66,963    175,053
  Eight years later......   47,883    45,541    67,786
  Nine years later.......   47,839    46,906
  Ten years later........   49,371
Redundancy
  (deficiency)...........  $ 3,799   $ 8,183   $ 8,510   $(16,785)  $(50,339)  $(51,014)  $ 13,400   $ 26,378
Net reserve -- end of
  period..........................................................................................   $322,394
Reinsurance recoverable on
  unpaid losses and loss
  adjustment expenses.............................................................................     90,366
                                                                                                     --------
Gross reserve -- end of
  period..........................................................................................   $412,760
                                                                                                     ========
Net re-estimated reserve --
  end of period...................................................................................   $296,016
Re-estimated reinsurance
  recoverable.....................................................................................     91,848
                                                                                                     --------
Gross re-estimated
  reserve -- end of period........................................................................    387,864
                                                                                                     --------
Gross cumulative redundancy
  (deficiency)....................................................................................    $24,896
                                                                                                     ========
 
<CAPTION>
                                      YEAR ENDED DECEMBER 31,
                                   ------------------------------
                                     1995       1996       1997
                                   --------   --------   --------
                                           (IN THOUSANDS)
<S>                                <C>        <C>        <C>
Liability for unpaid
  losses and loss
  adjustment expenses..........    $367,061   $469,258   $521,550
Paid (cumulative) as of:
  One year later...............     173,161    255,856
  Two years later..............     288,885
  Three years later............
  Four years later.............
  Five years later.............
  Six years later..............
  Seven years later............
  Eight years later............
  Nine years later.............
  Ten years later..............
Liability re-estimated as
  of:
  One year later...............     387,426    544,491
  Two years later..............     410,082
  Three years later............
  Four years later.............
  Five years later.............
  Six years later..............
  Seven years later............
  Eight years later............
  Nine years later.............
  Ten years later..............
Redundancy
  (deficiency).................    $(43,021)  $(75,233)
Net reserve -- end of
  period.......................    $367,061   $469,258   $521,550
Reinsurance recoverable on
  unpaid losses and loss
  adjustment expenses..........      76,309    121,326    206,871
                                   --------   --------   --------
Gross reserve -- end of
  period.......................    $443,370   $590,584   $728,421
                                   ========   ========   ========
Net re-estimated reserve --
  end of period................    $410,082   $544,679
Re-estimated reinsurance
  recoverable..................      83,202    134,668
                                   --------   --------
Gross re-estimated
  reserve -- end of period.....     493,284    679,347
                                   --------   --------
Gross cumulative redundancy
  (deficiency).................    $(49,914)  $(88,763)
                                   ========   ========
</TABLE>
 
     The first line of the preceding table depicts the estimated liability for
unpaid claim and claim adjustment expense recorded on the balance sheets of BIG
at the indicated balance sheet dates. This liability represents the estimated
amount of claim and claim adjustment expense for claims arising during all years
prior to the indicated balance sheet date that are unpaid as of that balance
sheet date, net of reinsurance recoverables, including losses that have been
incurred but not yet reported. The table also shows the re-estimated liability
as of the end of each succeeding year through the latest balance sheet date, and
the cumulative payments made for such claims, at annual intervals after the
initial indicated balance sheet date. The claim and claim adjustment expense
liability estimates change as more information becomes known about the frequency
and severity of claims for each year. A net reserve redundancy or deficiency is
displayed for each balance sheet date in the center of the table when the
initial liability estimate is greater (or less) than the re-estimated liability
at the latest balance sheet date. A gross-of-reinsurance redundancy (deficiency)
is displayed for each of the years ended December 31, 1994, 1995, and 1996 at
the bottom of the table.
 
                                       117
<PAGE>   120
 
     The net reserve deficiencies associated with the years ended December 31,
1987, 1988, and 1989 were due to CalComp's reassessment of the outstanding
reserve liability of all open claims at December 31, 1988, after BIG acquired
CalComp from Hanover in December, 1988. The net deficiencies associated with
reserves as of December 31, 1990, 1991, and 1992 were due to unexpected
increases in claims costs resulting from increased litigation in the California
workers' compensation system, an economic recession in California, and workers'
compensation laws that at the time effectively encouraged workers to file
unwarranted psychiatric stress and fraudulent claims. The net redundancies
associated with the years ended December 31, 1993 and 1994 occurred as a result
of significant reforms in the California workers' compensation laws that became
effective January 1, 1993 and an improvement in the California economy that were
not anticipated when reserves were established. The net reserve deficiencies
associated with the years ended December 31, 1995 and 1996 occurred as a result
of unexpected increases in severity affecting claims occurring in 1995 and 1996.
 
     BIG's experience with net reserve deficiencies occurring for the years
ended December 31, 1990 through 1992, 1995, and 1996 and net redundancies
occurring for the years ended December 31, 1993 and 1994 is believed by BIG to
be consistent with the results experienced by the California workers'
compensation industry during the same time periods. The underlying improvement
in claims frequency and severity during the years ended December 31, 1993 and
1994 that caused BIG to develop net redundant reserves is also consistent with
industry experience. The net reserve deficiencies occurring for the years ended
December 31, 1995 and 1996 resulted from unexpected increases in claims
severity, consistent, BIG believes, with some California workers' compensation
insurers' experience. The direct net-of-reinsurance redundancies displayed at
the bottom of the table reflect BIG's per risk excess of loss, quota-share, and
aggregate excess of loss reinsurance, the effects of which were to reduce BIG's
net redundancies/deficiencies due to the cession of a portion of BIG's
development.
 
     Currently, BIG's management prepares on a monthly basis a comprehensive
analysis of workers' compensation experience, and the process of estimating
claim and claim adjustment expense liabilities is continually modified to
consider additional information regarding trends in pricing, frequency, and
severity. Further, conditions and trends that have historically affected BIG's
claims may not necessarily be indicative of conditions and trends that will
affect future claims, and it is not appropriate to extrapolate future reserve
redundancies or deficiencies based on the data set forth above.
 
     By frequently reviewing reserves, management is generally able to detect
trends in claim and claim adjustment expenses and take appropriate actions in a
timely manner to avoid having to increase reserves substantially at a later
date. See "Risk Factors -- Uncertainty Associated with Estimating Reserves for
Unpaid Claim and Claim Adjustment Expense."
 
REINSURANCE
 
     Under reinsurance agreements, BIG reinsures certain workers' compensation
risks with other insurance companies. Reinsurance contracts do not relieve BIG
from its obligations to policyholders, and failure of reinsurers to honor their
obligations could result in losses to BIG. See "Risk Factors -- Importance of
Reinsurance." BIG has regularly evaluated the financial condition of its
reinsurers. Based on that evaluation, BIG's management believes the reinsurers
are creditworthy and that any potential losses on these agreements will not have
a material impact on the consolidated financial statements. At December 31,
1997, there were no disputes related to BIG's reinsurance agreements.
 
     BIG has a treaty with Gen Re providing for an aggregate unsecured
recoverable for losses, paid and unpaid, including incurred but not reported
loss adjustment expense, and unearned premiums in excess of 3% of the Company's
surplus at December 31, 1996, of $122.2 million, and December 31, 1997, of
$194.5 million.
 
     BIG maintains specific excess of loss reinsurance on workers' compensation
policies, which provides coverage in excess of $1,000,000 per occurrence for
accident years 1996 through 1998, in excess of $500,000 per occurrence for
accident years 1994 and 1995, in excess of $350,000 per occurrence for accident
years 1992 and 1993, and in excess of $250,000 per occurrence for accident years
1989 through 1991. The agreements provide coverage up to a maximum of $200
million per occurrence, including BIG's retention.
 
                                       118
<PAGE>   121
 
     In addition, BIG also purchased several pro rata reinsurance agreements
wherein the reinsurer assumed a proportional amount of net premiums earned and
related losses. The quota-share percentage ranged from 5% to 40% (5% at June 30,
1994). As of July 1, 1994 the quota-share agreement was terminated, and this
treaty was commuted in 1997. Effective July 1, 1996, BIG entered into a 30%
quota-share treaty to cede a proportional amount of net premiums earned and
related loss and loss adjustment expenses incurred. The 30% ceding rate is
applicable from July 1, 1996 to December 31, 1996. Effective January 1, 1997,
the quota-share reinsurance ceding rate was reduced to 7.5% through June 30,
1997. The quota-share treaty contains a provisional ceding commission, which
adjusts based on actual reported loss experience on the subject business. BIG
stopped ceding under the quota share treaty effective July 1, 1997.
 
     BIG entered into an aggregate excess of loss reinsurance agreement ("First
Aggregate Treaty") with Gen Re effective January 1, 1997. Under the terms of the
First Aggregate Treaty, $32.0 million of premiums were ceded to Gen Re and $37.3
million of losses and allocated loss adjustment expenses were ceded to Gen Re.
Effective July 1, 1997 a second six-month Aggregate Treaty was entered into with
Gen Re ("Second Aggregate Treaty"). Under the terms of the Second Aggregate
Treaty, $61.5 million of premiums were ceded to Gen Re and $75.0 million of
losses and allocated loss adjustment expenses were ceded to Gen Re. The First
and the Second Aggregate Treaties are expected to be commuted at or prior to the
Closing.
 
     Effective May 1, 1998, BIG entered into two additional reinsurance
agreements. One is an excess of loss reinsurance arrangement whereby losses in
excess of $500,000, per occurrence, are ceded. The other is a Quota-Share
Arrangement identical to Superior Pacific's whereby all policies with estimated
annual premium at inception of $25,000 or more are ceded to the reinsurer. See
"Superior National -- Business -- Reinsurance."
 
     In connection with the Acquisition, FHC will fulfill the Loss Reserves
Guarantee by causing BIG to obtain a binding commitment for an aggregate excess
of loss reinsurance agreement with a third-party reinsurer. The agreement will
provide $150.0 million of adverse loss development indemnification on BIG's
December 31, 1997 claim and claim adjustment expense reserves. In addition, FHC
has caused BIG further to obtain a binding commitment for a second aggregate
excess of loss reinsurance agreement providing $25.0 million of adverse loss
development indemnification for claims that occur during the period from January
1, 1998 until the Closing.
 
COMBINED CARE BENEFITS
 
     BIG, through CBIC in California and through BICO in Utah, markets a program
of "24-hour care," providing the insureds' employees with workers' compensation
and group health benefits. The intent of the program is to provide the insured
with "one-stop shopping," so that the same medical provider who handles illness
off the job can treat workplace injuries as well. Additionally, the insureds
obtain centralized claims service on both health and workers' compensation
benefits. The combined care benefits product generated $7.5 million in premium
in 1997, or 1.2% of BIG's overall direct written premium.
 
INVESTMENTS
 
     After the close of the Acquisition, BIG's invested cash will be invested in
a manner consistent with Superior Pacific's investment guidelines described in
"Superior National -- Business -- Investments."
 
     The amount and types of investments that may be made by BIG are regulated
under the California Insurance Code and rules and regulations promulgated by the
DOI, and are similarly regulated by the States of Delaware and New York. As of
December 31, 1997, approximately 98% of BIG's investment portfolio was held in
fixed income securities, of which 93% are rated "A" or better and 89% are
invested in municipal securities. BIG maintains a minimum rating requirement of
"BBB." As of December 31, 1997, the average duration of BIG's portfolio was 3.88
years, the market value of the portfolio was $625.4 million, and its book value
was $617.7 million.
 
                                       119
<PAGE>   122
 
INFORMATION SERVICES
 
     BIG uses a proprietary policy and claims administration system that was
developed in 1990. The system issues multistate policies for most
non-monopolistic states. Policies are issued, billed, endorsed, and final
audited through the system. Agency and direct billing are also supported by the
system. All functions except for premium audit and credit and collections are
decentralized through the system and may be carried out in any office that has
proper authorization. The claims system enforces benefit limits and vocational
rehabilitation benefits, and automatically places claims on diaries and produces
required notices. BIG is currently upgrading its computer software to address
the Year 2000 problem, which BIG believes will be completed by August 1998,
prior to issuing policies with a Year 2000 expiration date. Upon the completion
of such upgrade, BIG believes that its computer systems will be 100% Year 2000
compliant; there can be no assurance, however, that BIG will complete the
computer upgrade before issuing policies with a Year 2000 expiration date or
that such upgrade will successfully prevent any Year 2000 problems from
occurring. See "Business Insurance Group, Inc. -- Management's Discussion and
Analysis of Financial Condition and Results of Operations."
 
     BIG operates a client/server wide area network ("WAN") in a Windows
environment. This system shares a similar technical background with the
Company's, which will make a conversion to the Company's computer system easier
than if BIG utilized a mainframe system.
 
COMPETITION
 
     Within California, BIG and Superior National compete for the same accounts
and face similar issues. See "Superior National Business -- Competition."
 
     Nationally, several of the largest and best known multi-line insurance
carriers seek to obtain accounts for their workers' compensation arms in direct
competition with BIG. These carriers include Liberty Mutual, American
International Group and the Travelers Group. Many competing carriers have higher
A.M. Best ratings, enhancing their competitive position. Thus, BIG competes with
better capitalized and higher rated insurance concerns to write workers'
compensation insurance for the nation's largest industrial and service
companies. Additionally, many large companies self-insure for workers'
compensation where permitted by local regulations.
 
     The workers' compensation market is commodity-oriented, highly fragmented,
and reflective of intense price competition. Nevertheless, because each risk is
unique in terms of insurance exposure, different insurers can develop widely
divergent estimates of prospective losses. Most insurers attempt to segment
classes within markets so that they target the more profitable sub-classes with
lower, although adequate, rates given the estimated profitability of the
segment. In some cases, no statistics are available for the sub-classes
involved, and the insurer implements discounted rate structures based solely on
theoretical judgment. Finally, different insurers have widely divergent internal
expense positions, due to distribution methods, economies of scale, and
efficiency of operations. Therefore, although workers' compensation insurance is
a commodity, the price of insurance does not necessarily reflect commodity
pricing. BIG's existing and prospective customer bases are vulnerable to
competition, especially from larger insurers that at any time are capable of
penetrating BIG's markets with products priced at levels substantially below
BIG's.
 
RATINGS
 
     A.M. Best has currently assigned a "B++" (Very Good) rating to BIG, a
rating it was assigned in February 1998. The "B++" rating marks a downgrade from
the "A-" (Excellent) rating BIG had held from 1993 through 1998. The following
factors were relevant in A.M. Best's decision to downgrade the rating: BIG's
projected 1997 underwriting loss and reduced capital position following the
announcement that it would increase its loss reserves in response to adverse
loss development on its most recent accident years, the continued uncertainty
related to the pricing environment in BIG's core California market, BIG's
aggressive premium growth over the past few years, the potential for further
adverse loss development impacting future earnings, the capital position of BIG,
and the uncertainty regarding BIG's future ownership. In February 1998, the
"B++" rating was placed under review by A.M. Best with negative implications. In
May 1998, however,
                                       120
<PAGE>   123
 
following announcement of the Acquisition, A.M. Best stated BIG's "B++" rating
was under review with developing (a change from negative) implications.
 
     A.M. Best's ratings are based upon an evaluation of an insurer's: (i)
financial strength (leverage/ capitalization, capital structure/holding company,
quality, appropriateness of reinsurance program, adequacy of loss/ policy
reserves, quality, diversification of assets, and liquidity); (ii) operating
performance (profitability, revenue composition, and management experience and
objectives); and (iii) market profile (market risk, competitive market position,
spread of risk, and event risk) subject to confirmation of A.M. Best procedure.
A rating of "B++" from A.M. Best is considered by A.M. Best to be a "secure
rating." BIG is currently rated "BBB" by S&P, a claims paying rating it has held
since 1995. Such ratings are subject to change and are not recommendations to
buy, sell, or hold securities.
 
     One factor in an insurer's ability to compete effectively is its A.M. Best
rating because some customers and insurance brokers require certain ratings as a
prerequisite for writing business with an insurance company. The reduction of
BIG's A.M. Best rating in February 1998 may have had an adverse effect on BIG's
competitive position in the nationwide workers' compensation insurance market.
 
     A.M. Best often follows a practice of assigning an equal rating to all
insurers within an affiliated group of companies. If this practice is followed
with respect to Superior National's insurance subsidiaries after the
Acquisition, there can be no assurance that Superior Pacific's "B+" A.M. Best
rating will not be assigned to the BIG Insurance Subsidiaries. Such a rating
would reflect a further downgrade of BIG's rating and would likely have a
material adverse effect on Superior National's competitive position and results
of operations.
 
REGULATION
 
     BIG and its insurance subsidiaries, like Superior National and its
insurance subsidiaries, are subject to extensive governmental regulation and
supervision. See "Superior National -- Business -- Regulation." Moreover,
outside of California, workers' compensation insurers may be required to
participate in assigned risk plans that provide coverage to individuals or
entities unable to obtain coverage from existing insurers in those states. The
net profit or loss incurred in administration of these plans is allocated back
to participant insurers based on each insurer's relative market share in each
state. In addition to DOI regulation, BICO is subject to regulation by the
Delaware Department of Insurance, and CCIC is subject to regulation by the New
York Department of Insurance.
 
     California law also limits the ability of the BIG Insurance Subsidiaries to
pay stockholder dividends to BIG. See "Superior
National -- Business -- Regulation." Based upon restrictions presently in
effect, the maximum amount available for payment of dividends by the BIG
Insurance Subsidiaries during 1998 without prior regulatory approval is
approximately $21.3 million. In ordinary circumstances, following a change in
control BIG's subsidiaries would have a two-year moratorium on payment of
dividends. Superior National expects to obtain a waiver of such restrictions.
 
     The NAIC's RBC formulae are also applied to BIG's subsidiaries. See
"Superior National -- Business -- Regulation." As of December 31, 1997, all of
the BIG Insurance Subsidiaries engaged in continuing operations that exceed all
RBC levels requiring any regulatory intervention.
 
     Like Superior National, based on its 1997 statutory financial statement,
CBIC was within the usual range of eleven of the twelve IRIS tests, CalComp and
CCIC were within the usual range of nine of the twelve IRIS tests, and BICO was
within the usual range of six of the twelve IRIS tests. CBIC was outside the
range of the one-year reserve development to surplus test. CalComp was outside
of the usual range of the tests measuring two-year overall operating ratio,
one-year reserve development to surplus, and two-year reserve development to
surplus. CCIC was outside the usual range of tests measuring change in net
writings, two-year overall operating ratio, and investment yield. BICO was
outside of the usual range of the tests measuring net premiums to surplus,
change in net writings, two-year overall operating ratio, change in surplus,
agents' balances to surplus, and one-year reserve development to surplus.
 
     As a result of the statutory financial results filed by BICO for the year
ended December 31, 1997, and BICO's only passing six of the twelve IRIS tests
for 1997, insurance regulators in certain states in which
                                       121
<PAGE>   124
 
BICO is licensed have requested an explanation for the 1997 financial results as
filed. Two states, Minnesota and North Carolina, accounting for $662,000 in
direct written premium in 1997 (representing 0.1% of BIG's total direct written
premium), summarily restricted BICO's issuance of new workers' compensation
policies based on BICO's reported financial results. In responding to the
various regulatory authorities, BICO has replied by stating that the reason for
the reduced 1997 income and policyholders' surplus result was due to BICO's
increased percentage of the BIG intercompany pooling reinsurance agreement
effective January 1, 1997. In 1996, BICO's reinsurance pooling percentage was
15%. In 1997, the percentage was increased to 25%. On a consolidated basis, BIG
reported an increase to its estimate for the 1996 accident year loss and loss
adjustment expenses by $53.2 million in its 1997 financial statements. BICO's
proportionate share of this adverse prior accident year development increased
BICO's 1997 calendar year loss before income taxes by $5.3 million. In addition,
the higher percentage of the 1997 accident year results accounted for another
$2.1 million of losses, for a total of $7.4 million on a pre-tax basis. BICO's
response to regulators also disclosed: the May 5, 1998 announcement of the sale
of BIG and its four insurance subsidiaries from FHC to Superior, and the Loss
Reserves Guarantee in favor of Superior National in the amount of $175.0
million, obtained at FHC's cost through the purchase of reinsurance (See
"-- Reinsurance"). In addition, effective May 1, 1998, BIG entered into two new
reinsurance treaties: the first is a specific excess of loss agreement for
losses between $0.5 million and $1.0 million, per occurrence; and the second is
the Quota-Share Arrangement whereby BIG will cede 100% of the gross premiums
earned on accounts with an estimated annual premium at inception greater than
$25,000, and 100% of the net losses and allocated loss adjustment expenses
incurred on those associated policies for claims with an accident date of May 1,
1998 and subsequent. BIG will also recognize a 33.5% ceded commission of
premiums ceded under this agreement. Pursuant to the Acquisition Agreement, BIG
and Superior National are jointly discussing these financial and regulatory
issues with regulators. Additionally, Zurich Centre Group LLC has agreed to
purchase BICO from Superior National after the Closing.
 
     The California DOI Triennial Examination for CalComp, which covered the
five years ended December 31, 1995, was completed in 1997. As of December 31,
1995, CalComp reported policyholders' surplus of $151.6 million. Based on the
Triennial Examination, the DOI reported CalComp's statutory surplus at $103.7
million, a difference of $47.9 million from the surplus reported by CalComp. The
entire difference between CalComp's reported surplus and the surplus balance per
the DOI exam was included and accounted for in CalComp's statutory financial
statements for the year ended December 31, 1996. Of the $47.9 million
difference, $10.0 million was due to the non-admission of a promissory note due
CalComp from FHC, $27.2 million was due to an increase to CalComp's claim and
claim adjustment expenses, including $6.8 million related to the statutory
excess liability, and $10.7 million was due to other miscellaneous adjustments.
During 1996, CalComp made the necessary adjustments to its internal control
structures and its policies and procedures to address the issues raised by the
DOI in connection with the Triennial Examination. Triennial Examinations as of
December 31, 1995 were also completed for BICO and CBIC by the Delaware
Department of Insurance and DOI, respectively. BICO's reported surplus at
December 31, 1995 of $7.2 million was reduced by $0.7 million by Delaware to
$6.5 million. The BICO surplus adjustment was primarily related to a federal
income tax recoverable of $0.5 million deemed to be non-admitted for statutory
accounting purposes. The DOI made no surplus adjustments to CBIC's reported
statutory policyholder surplus balance of $7.4 million at December 31, 1995.
 
                                       122
<PAGE>   125
 
MANAGEMENT
 
     As of the date hereof, the management of BIG is as follows:
 
<TABLE>
<CAPTION>
                                                                                         YEAR
                                                                                        JOINED
             NAME                AGE                       TITLE                          BIG
             ----                ---                       -----                      -----------
<S>                              <C>   <C>                                            <C>
Maurice A. Costa...............  50    Chairman, President and Chief Executive           1988
                                       Officer
Robert P. White................  51    Senior Vice President-Field Operations            1988
Dana P. Brown..................  53    Senior Vice President-Chief Information           1988
                                       Officer
Jacqueline Andersen-McAuley....  41    Senior Vice President-Underwriting                1997
Paul W. Souza..................  38    Vice President-Finance and Treasurer              1995
Gregory L. Johnson.............  50    Vice President-Marketing                          1988
Robert A. Kamrath..............  53    Vice President-Administration                     1996
Deborah Day, M.D., MPH.........  45    Medical Director                                  1997
Trecia M. Nienow, Esq. ........  37    Corporate Counsel and Secretary                   1997
</TABLE>
 
     Maurice A. Costa was a founder of the company that acquired CalComp from
Hanover in December 1988. He has been Chairman, President, and Chief Executive
Officer since November 1993, and has directed the operations of BIG since 1988.
Mr. Costa has more than 29 years of insurance industry experience having worked
for Industrial Indemnity Company from 1969 to 1988 in various claims,
underwriting, and management positions, including Division Manager from 1983 to
1988.
 
     Robert P. White was a founder of the company that acquired CalComp from
Hanover in December 1988. He has been Senior Vice President -- Field Operations
since 1993 and, since 1988, has held various management positions with BIG
including Southern California Division Manager and Division Manager of Special
Programs, and was responsible for the expansion into states outside of
California. He has more than 24 years of insurance industry marketing and
underwriting experience, having worked for Industrial Indemnity Company from
1977 to 1988, including as Division Manager from 1980 to 1988 and prior to that
with Royal Globe Insurance Company and Insurance Company of North America.
 
     Dana P. Brown was a founder of the company that acquired CalComp from
Hanover in December 1988. Mr. Brown has 21 years of insurance industry
information services and data processing experience having held similar
positions at Employee Benefits Insurance Company from 1976 to 1982. Following
the acquisition by the predecessor to FHS, Mr. Brown became Senior Vice
President of Information Technology for FHC in 1994 and subsequently returned to
BIG in his current position in 1996. Mr. Brown has a Doctorate in Physics from
the University of California.
 
     Jacqueline Andersen-McAuley joined BIG as Senior Vice
President -- Underwriting in July 1997, having most recently held the position
of Executive Vice President -- Workers' Compensation at Golden Eagle Insurance
Company, where she was employed from 1991 to 1997 and was responsible for
workers' compensation underwriting, loss control, and claims operations. Ms.
McAuley has more than 19 years of insurance industry experience in claims and
marketing with Guarantee National Insurance Company, Occidental Fire and
Casualty Insurance Company, National Farmers Union Insurance Company, and State
Farm Insurance Company. She also owned and operated a fire and casualty
insurance brokerage firm in California and Wyoming from 1985 to 1991.
 
     Paul W. Souza has been Vice President -- Finance and Treasurer since 1995
and had been previously employed as a Vice President and Controller from 1989 to
1991. Mr. Souza has 16 years of insurance accounting, finance, and premium
accounting/collection experience, having worked for Fireman's Fund Insurance
Company and Beaver Insurance Company. Mr. Souza was employed by Pac Rim, where
he was Vice President and Treasurer, from 1991 to 1995.
 
     Gregory L. Johnson has been employed by BIG since 1988 in various positions
including Regional Manager and Northern California Division Manager prior to
assuming the position of Vice President -- Marketing in 1995. Mr. Johnson has
more than 23 years of insurance industry experience, having worked for
 
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Industrial Indemnity Company from 1970 to 1973 and 1985 to 1988, which included
a Marketing Manager position. Mr. Johnson has held marketing positions with
Employee Benefits Insurance Company, Mission Insurance Company, and Insurance
Company of the West.
 
     Robert A. Kamrath joined BIG in 1996 as Vice President -- Administration.
Mr. Kamrath served in the U.S. Navy for 30 years in various command positions
including Captain of Submarines and Surface Ships. He also held the position of
Chief of Staff of the Naval Base of Charleston, South Carolina, where he
provided management oversight to a combined military and civilian workforce of
20,000. Prior to joining BIG, he worked for Tracor Applied Services as a
Director. Mr. Kamrath has a M.S. in Systems Engineering from George Mason and a
M.S. in Management from the Naval Post Graduate School.
 
     Deborah Day, M.D., MPH joined BIG in 1997 as Medical Director. Dr. Day has
over 13 years of experience in Occupational and Environmental Medicine as a
Clinician and as Medical Director for the UCLA self-insured workers'
compensation program from 1988 to 1992, where she was responsible for developing
treatment protocols and return-to-work programs. Prior to joining BIG, Dr. Day
was employed by Zenith National Insurance Company as Medical Director from 1992
to 1997, including a role in the management and development of their Single
Point product. Dr. Day is a member of the American College of Physicians and the
American College of Occupational and Environmental Medicine.
 
     Trecia M. Nienow, Esq. joined BIG as Corporate Counsel and Secretary in
1997 from FHS, where she had been employed in the corporate tax and law
departments since 1992. Since the Company's acquisition by FHS's predecessor in
1993, Ms. Nienow has provided compliance, licensing, and general corporate legal
support to BIG. Ms. Nienow is licensed by the State Bar of California and holds
a Master of Laws in Taxation.
 
EMPLOYEES
 
     As of June 1, 1998, BIG had approximately 1,225 employees, none of whom was
covered by a collective bargaining agreement.
 
BUSINESS PROPERTIES
 
     BIG's principal executive offices are located in Rancho Cordova, California
and are subject to a lease that expires in 2005. All of the facilities housing
BIG's 37 branch and regional offices in 42 states are leased, with lease
expiration dates ranging from 1998 to 2005. Nine of these facilities lease space
from FHS or its affiliates, and at nine facilities, Superior National has agreed
to provide FHS or its affiliates with subleases after the Closing.
 
     The address for BIG's principal executive office is 11171 Sun Center Drive,
Rancho Cordova, California 95670, and the telephone number is (916) 853-7540.
 
LEGAL PROCEEDINGS
 
     BIG and its subsidiaries are parties to various legal proceedings, all of
which are considered routine and incidental to the business of BIG and are not
material to the financial condition and operation of the business. Neither BIG
nor any of its subsidiaries is a party to any litigation expected to have a
material adverse effect upon BIG's business and financial position.
 
     BIG, like Superior National, is subject to class action litigation filed
against all workers' compensation insurers in California, related principally to
claims paying practices. Such litigation is being vigorously contested by BIG.
Although the likelihood of a material adverse result in such matters is regarded
by the defendants as low, there can be no assurance that, should a trial be
held, the class plaintiffs will not receive a substantial award.
 
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<PAGE>   127
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The following summary description of Superior National's capital stock does
not purport to be complete and is qualified in its entirety by reference to the
Company's Certificate of Incorporation, Bylaws, the forms of outstanding
warrants, the Registration Rights Agreement (as defined herein), and the Amended
Registration Rights Agreement (as defined herein), copies of which are
incorporated by reference as exhibits to the Registration Statement of which
this Prospectus is a part, and by provisions of applicable law.
 
AUTHORIZED AND ISSUED CAPITAL STOCK
 
     The authorized capital stock of the Company consists of 25 million shares
of Common Stock, par value $.01 per share. Assuming the stockholders approve an
amendment to increase the number of authorized shares of Common Stock at the
Company's upcoming annual meeting of stockholders, the number of authorized
shares of Common Stock will be 40 million.
 
     On June 30, 1998, there were 5,876,368 shares of Common Stock outstanding
held of record by 245 stockholders. Upon consummation of the Equity Financings,
and assuming full exercise of Rights and/or warrant holder preemptive rights,
there will be approximately 18,036,972 shares of Common Stock outstanding,
assuming no outstanding options or warrants are exercised.
 
COMMON STOCK
 
     Each share of Common Stock is entitled to one vote on all matters submitted
to a vote of the stockholders of the Company. In electing directors, subject to
complying with certain notice requirements, each stockholder is entitled to
cumulate such holder's votes and give one candidate a number of votes equal to
the number of directors to be elected multiplied by the number of shares of
Common Stock held, or to distribute such votes among as many candidates as the
holder sees fit. The holders of Voting Notes vote with holders of Common Stock
on elections of directors, as a single class. Generally, all matters to be voted
upon by stockholders must be approved by a majority of the votes cast or
entitled to be cast by all shares of Common Stock. Holders of Common Stock are
entitled to receive ratably dividends, if any, as may be declared by the Board
of Directors out of funds legally available therefor. See "Dividend Policy." In
the event of a liquidation, dissolution, or winding up of the Company, holders
of the Common Stock are entitled to share ratably in all assets remaining after
payment of liabilities and the liquidation preference of any then outstanding
class or series of stock ranking prior to the Common Stock. Holders of Common
Stock have no preemptive rights and no right to convert their Common Stock into
any other securities. There are no redemption or sinking fund provisions
applicable to the shares of Common Stock. All outstanding shares of Common Stock
are, and the Common Stock to be outstanding upon completion of the Stock
Offering will be, fully paid and nonassessable.
 
VOTING NOTES
 
     On March 31, 1992, the Company issued the Voting Notes in connection with a
transaction wherein the Company issued its 14.5% Notes in an aggregate principal
amount of $11.0 million, together with warrants to purchase approximately
1,616,886 shares of Common Stock. The Company redeemed all of its 14.5% Notes
with a prepayment, effective June 30, 1994, except for the Voting Notes, with
respect to which prepayment is prohibited. See "Certain Relationships and
Related Transactions -- Transactions with Affiliates of Zurich, Including Centre
Re." The outstanding principal amount of the Voting Notes is $30,000. The number
of votes attaching to the Voting Notes is equal to the number of shares of
Common Stock that may be purchased upon exercise of the warrants that were
issued in that March 31, 1992 transaction and that remain outstanding and are
unexercised as of the applicable record date for a stockholder vote. As of June
30, 1998, the number of votes held by III, the holder of the Voting Notes, was
equivalent to 1,566,465 shares of Common Stock. The holder of the Voting Notes
is permitted to vote only in director elections, director removals, votes on
amending that right to vote, and changes to the number of authorized directors.
As a result of the cancellation of a portion of the relevant warrants, the
number of Common Stock equivalent votes held under the Voting Notes has
decreased somewhat since March 31, 1992. The specific voting rights of the
Voting Notes are set forth in the Company's Certificate of Incorporation and
Bylaws.
 
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<PAGE>   128
 
WARRANTS
 
     The Company has issued warrants to purchase an aggregate of 2,145,821
shares of Common Stock, which expire on April 1, 2002. The exercise price of the
warrants range from $4.00 to $5.20 per share. The Company granted certain
registration rights to the holders of these warrants upon their issuance. See
"-- Registration Rights." These warrants also contain certain customary
preemptive rights, exercise price adjustments, and anti-dilutive provisions.
 
     In consideration of the commitment to provide the Standby Commitment, IP
and an affiliate of Zurich will receive a commitment fee, regardless of whether
the Stock Offering and Standby Commitment are consummated, consisting of the
Commitment Fee Warrants to purchase 734,000 shares of Common Stock at $16.75 per
share. The Commitment Fee Warrants expire five years after their date of
issuance. The Commitment Fee Warrants contain certain customary anti-dilutive
provisions and exercise price adjustments.
 
REGISTRATION RIGHTS
 
     The warrants (excluding the Commitment Fee Warrants, the holders of which
will have, upon the exercise thereof, the registration rights set forth in the
Amended Registration Rights Agreement) provide the holders thereof certain
rights with respect to registration of shares which could be received upon
exercise of the warrants. Under the terms of the warrants, under certain
conditions, the holders of the warrants may require the Company to register the
shares of Common Stock that could be issued upon exercise of the warrants.
Moreover, if the Company proposes to register any of its securities under the
Securities Act for its own account or for the account of others, the holders of
the warrants are entitled to elect to include in such registration the shares
issuable upon exercise of the warrants.
 
     The Registration Rights Agreement, dated as of April 11, 1997 (the
"Registration Rights Agreement"), by and among the Company, IP Delaware, and IP
Bermuda provides that, with respect to the approximately 2.2 million shares of
Common Stock purchased by IP Delaware and IP Bermuda under the 1996 Stock
Purchase Agreement, IP Delaware, IP Bermuda, and any affiliate thereof (as
defined in Rule 12b-2 promulgated pursuant to the Exchange Act) to whom or which
such shares have been transferred may, on not more than three occasions at any
time commencing after the date thereof, require the Company at its sole expense
to prepare and file with the SEC a registration statement under the Securities
Act covering the public offer and sale of such shares, in addition to other
shares requested to be so covered by other securities holders having similar,
preexisting registration rights, and use its best efforts to cause to be
declared effective and remain effective for up to the lesser of 180 days or the
period during which all of the shares requested to be so registered by IP
Delaware or IP Bermuda and any affiliate thereof have been sold (a "Demand
Registration"). IP Delaware, IP Bermuda, and their affiliates also have
customary "piggyback" registration rights allowing them to register shares in
the event the Company proposes to sell any of its Common Stock or other
securities to the public in a transaction registered under the Securities Act.
Notwithstanding the terms described above, the Company is not required to file a
registration statement in response to a Demand Registration if certain
conditions are not met, including the anticipated failure of a Demand
Registration to earn aggregate net offering proceeds of $7.5 million or more. In
addition, the ability of IP Delaware, IP Bermuda, and any affiliate thereof to
request three Demand Registrations shall be reduced to two requests if the
Company has registered shares of such Common Stock held by IP Delaware, IP
Bermuda, or any of its affiliates having an anticipated net offering proceeds of
not less than $5 million pursuant to an exercise of their "piggyback" rights.
The Common Rights Agreement contains additional customary terms and provisions,
including reciprocal indemnification and contribution provisions with respect to
information furnished or provided by the Company or IP Delaware and IP Bermuda
for inclusion in any such registration statement.
 
     The Amended and Restated Registration Rights Agreement to be entered into
by the Company and IP as a condition to the IP Stock Issuance ("Amended
Registration Rights Agreement") provides that IP and any affiliate thereof (as
defined in Rule 12b-2 promulgated pursuant to the Exchange Act) to whom or which
shares of Common Stock have been transferred by IP may, on not more than four
occasions at any time after the Closing Date, initiate a Demand Registration
covering the public offer and sale of shares of Common Stock they hold
(including shares issued in the IP Stock Issuance and upon exercise of the
Commitment Fee
 
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<PAGE>   129
 
Warrants), in addition to other shares requested to be so covered by other
securities holders having similar, preexisting registration rights.
Notwithstanding the terms described above, the Company is not required to file a
registration statement in response to a Demand Registration if certain
conditions are not met, including the anticipated failure of a Demand
Registration to achieve aggregate net offering proceeds of $7.5 million or more.
Under the Registration Rights Agreement, IP and its affiliates have customary
"piggyback" registration rights allowing them to register shares in the event
the Company proposes to sell any of its Common Stock or other securities to the
public in a transaction registered under the Securities Act. The Amended
Registration Rights Agreement contains additional customary terms and
provisions, including reciprocal indemnification and contribution provisions
with respect to information furnished or provided by the Company or IP for
inclusion in any such registration statement. Under the terms of the Stock
Purchase Agreement, the Amended Registration Rights Agreement will be executed
by the Company and IP at the Closing, at which point it will amend and supersede
in its entirety the Registration Rights Agreement.
 
DELAWARE ANTI-TAKEOVER LAW AND CERTAIN CHARTER PROVISIONS
 
  Transfer Restrictions
 
     On April 11, 1997, the Company, with Board of Director and stockholder
approval, adopted provisions (the "Transfer Restrictions") in its Certificate of
Incorporation that were designed to restrict, for a period of three years,
direct and indirect transfers of the Company's equity securities that could
result in the imposition of limitations on the use by the Company, for federal
income tax purposes, of NOLs and other tax attributes that were and will be
available to the Company. In general, NOLs can benefit the Company by offsetting
taxable income dollar-for-dollar by the amount of the NOLs, thereby eliminating
(subject to a relatively minor alternative minimum tax) the federal corporate
tax on such income. The Transfer Restrictions prohibit 4.9% or greater
stockholders from accumulating additional shares of Common Stock (or securities
exercisable into Common Stock) without prior approval from the Board of
Directors. The Board of Directors has waived the Transfer Restrictions for
purposes of approving the Equity Financings.
 
     The Board of Directors has also approved the removal of the Transfer
Restrictions from the Company's Certificate of Incorporation and anticipates
receiving stockholder approval for their removal at the Company's upcoming
annual meeting of stockholders. Assuming stockholder approval is obtained, the
removal of the Transfer Restrictions will be effective upon consummation of the
Acquisition. If the Acquisition is not consummated, the Transfer Restrictions
will remain in the Certificate of Incorporation.
 
     Because some corporate takeovers occur through an acquiror's purchase (in
the public market or otherwise) of sufficient stock to give it control of a
company, any provision that restricts the transferability of shares can have the
effect of preventing such a takeover. The Transfer Restrictions therefore may be
deemed to have an "antitakeover" effect because they restrict, up to April 2000,
the ability of a person or entity or group thereof from accumulating an
aggregate of 4.90% or more of the Common Stock or Voting Notes and the ability
of persons, entities or groups now owning 4.90% or more of the Common Stock or
Voting Notes from acquiring additional securities. Further, the Transfer
Restrictions discourage or prohibit accumulations of substantial blocks of
shares for which stockholders might receive a premium above market value.
 
  Section 203 of the Delaware General Corporation Law
 
     The Company is subject to the provisions of Section 203 of the Delaware
General Corporation Law, an anti-takeover law. In general, the statute prohibits
a publicly held Delaware corporation from engaging in a business combination
with an "interested stockholder" for a period of three years after the date of
the transaction in which the person became an interested stockholder, unless the
business combination is approved by the Board of Directors and the holders of at
least 66 2/3% of the outstanding voting stock of the corporation (excluding
shares held by the interested stockholder). A "business combination" includes a
merger, asset sale, or other transaction resulting in financial benefit to the
interested stockholder. An "interested stockholder" is a person who, together
with affiliates and associates, owns (or within the three prior years, did own)
15% or more of the corporation's voting stock. This statutory prohibition does
not apply if, upon consummation of the transaction in which any person becomes
an interested stockholder, the interested stockholder owns at least
 
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<PAGE>   130
 
85% of the outstanding voting stock of the corporation (excluding shares held by
persons who are both directors and officers or by certain stock option plans).
 
RIGHTS
 
     In connection with the Stock Offering, the Company is issuing Rights,
consisting of the right to subscribe for and purchase an aggregate of 6,548,664
shares of Common Stock at a Subscription Price of $16.75 per share. See "The
Stock Offering."
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for the Common Stock is U.S. Stock
Transfer Corporation. The Subscription Agent for the Rights is                .
The Information Agent for Rights is                .
 
LISTING
 
     The Common Stock is listed for trading under the symbol "SNTL" on Nasdaq.
The Rights will be listed for trading under the symbol "               " on
Nasdaq.
 
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<PAGE>   131
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
     As of June 30, 1998, the Company had outstanding 5,876,368 shares of Common
Stock. Upon completion of the Equity Financings, assuming full exercise of
Rights and/or warrant holder preemptive rights, the Company will have
outstanding approximately 18,036,972 shares of Common Stock, assuming no
exercise of outstanding options or warrants. Of these shares, approximately
8,835,980 shares of Common Stock will be tradeable without restriction or
further registration under the Securities Act, except for any shares purchased
by "affiliates" (as defined in Rule 144) of the Company, the resale of which
shall be subject to the volume limitations of Rule 144 promulgated under the
Securities Act ("Rule 144"). Shares to be issued in the Employee Participation,
due to certain contractual restrictions, will be non-transferable for a period
of one year.
 
     In general, under Rule 144, as currently in effect, a person (or persons
whose shares are aggregated) who has beneficially owned "restricted securities"
for at least one year, including an affiliate of the Company, would be entitled
to sell, within any three-month period, that number of shares that does not
exceed the greater of 1% of the then-outstanding shares of Common Stock and the
average weekly trading volume in the Common Stock during the four calendar weeks
immediately preceding the date on which the notice of sale is filed with the
SEC, provided certain manner of sale and notice requirements and requirements as
to the availability of current public information about the Company are
satisfied. Under Rule 144(k), a holder of "restricted securities" who is not
deemed an affiliate of the issuer and who has beneficially owned shares for at
least two years would be entitled to sell shares under Rule 144(k) without
regard to the limitations described above. As defined in Rule 144, an
"affiliate" of an issuer is a person who directly or indirectly through the use
of one or more intermediaries controls, or is controlled by, or is under common
control with, such issuer.
 
     The shares to be issued in the Rights Offering will be registered under the
Securities Act and immediately available for sale to the public. The shares
issued through the Employee Participation will be registered under the
Securities Act and will be available for sale to the public after restrictions
on transferability applicable to them under the terms of the Employee
Participation lapse, subject to restrictions on sales of Common Stock by
affiliates of the Company. Thus, if all the issued Rights are exercised, the
6,548,664 shares issued in the Stock Offering will be eligible for sale as
stated in this paragraph.
 
     The Company has registered approximately 1,605,350 shares of Common Stock
reserved for issuance pursuant to the 1986 Plan and the 1995 Plan, under which
options to purchase approximately 579,829 shares of Common Stock have been
granted as of June 30, 1998 and           shares of Restricted Stock have been
granted. Effective upon completion of the Acquisition, the Company intends,
subject to stockholder approval, to increase the total number of shares of
Common Stock reserved for issuance under the 1995 Plan to 3,000,000 shares of
Common Stock, to adopt a stock purchase plan with 500,000 shares reserved for
issuance, and to register the future issuance of all these shares on Form S-8.
 
     In addition, there are approximately 4.6 million shares of Common Stock
issuable or outstanding that are "restricted securities" within the meaning of
Rule 144 that were sold by the Company in private transactions and may be
publicly sold only if registered under the Securities Act or sold in accordance
with an applicable exemption from registration, such as Rule 144. These shares
include an aggregate of approximately 2.2 million shares issuable upon exercise
of outstanding warrants and approximately 2.4 million shares issued privately.
All of these warrants are subject to an agreement among all warrant holders that
prohibits the exercise or transfer of any such warrants until April 2000 unless
prior approval from the Board of Directors is obtained. Assuming that the
Company's stockholders approve a proposal to remove the Transfer Restrictions
contained in the Company's Certificate of Incorporation at the Company's
upcoming annual meeting of stockholders, it is anticipated that this agreement
will terminate upon the consummation of the Equity Financings. A significant
portion of these shares may be eligible for sale under Rule 144 immediately upon
exercise, subject to the volume limitations set forth in Rule 144. Additionally,
the Company has granted registration rights to each holder of these warrants.
These shares eligible for future sale also include approximately 2.4 million
shares issued to IP Delaware, IP Bermuda, TJS, and certain members of the
Company's management in April 1997 under the terms of the 1996 Stock Purchase
Agreement. These shares are now eligible for sale under Rule 144, subject to the
volume limitations thereof except that the shares by IP Delaware and IP Bermuda
are subject to certain restrictions on transfer. See "Certain Relationships and
Related Transactions -- 1996-97
                                       129
<PAGE>   132
 
Transactions with IP and Limitations on Related Party Control." Additionally,
the Company has granted registration rights to IP Delaware and IP Bermuda with
respect to the shares they acquired under the 1996 Stock Purchase Agreement. See
"Description of Capital Stock -- Registration Rights."
 
     The 5,611,940 shares to be purchased by IP in the IP Stock Issuance will be
issued in a private transaction and thus will be restricted from resale upon
issuance. Under Rule 144, these shares will be eligible for sale beginning one
year after their issuance, subject to the volume limitations set forth in Rule
144. Any shares purchased (i) by warrant holders exercising their preemptive
rights to purchase Common Stock under the terms of the IP Stock Issuance, or
(ii) under the Standby Commitment will be subject to identical treatment. In
addition, the Company has agreed to provide IP additional registration rights in
consideration of the transactions contemplated by the IP Stock Issuance. See
"Description of Capital Stock -- Registration Rights."
 
                   CERTAIN FEDERAL INCOME TAX CONSIDERATIONS
 
GENERAL
 
     The following is a general discussion of certain U.S. federal income tax
considerations applicable upon the issuance, exercise, disposition and lapse of
Rights issued to the existing stockholders and warrant holders pursuant to the
Rights Offering and to the employees and consultants of the Company pursuant to
the Employee Participation. This summary is based upon current provisions of the
Code, regulations of the Treasury Department, administrative rulings and
pronouncements of the Service, and judicial decisions currently in effect, all
of which are subject to change, possibly with retroactive effect. This
discussion does not deal with all aspects of federal income taxation that may be
relevant to particular holders of Common Stock, warrants and/or options in light
of their personal investment circumstances (for example, to persons holding
interests in the Company as part of a conversion transaction or as part of a
hedge or hedging transaction, or as a position in a straddle for tax purposes),
nor does it discuss federal income tax considerations applicable to certain
holders of interests in the Company subject to special treatment under the
federal income tax laws (for example, insurance companies, tax-exempt
organizations, financial institutions or broker-dealers, taxpayers subject to
the alternative minimum tax, or non-United States persons).
 
     This discussion does not address the treatment of holders of restricted
Common Stock with respect to which Rights will be issued pursuant to the
Employee Participation and only addresses the existing stockholders and the
warrant holders who will both hold their respective interests in the Company as
capital assets and will hold any Common Stock received upon exercise of the
Rights as capital assets (persons who may not be holding their interests in the
Company as capital assets might include, for example, securities dealers or
traders who do not hold their interests primarily for investment or who treat
their interests as inventory for federal income tax purposes). In addition, this
discussion does not consider the effect of any foreign, state, local, gift or
estate or other tax laws that may be applicable to a particular investor. No
ruling has been or will be sought from the Service concerning the tax issues
addressed herein, and such issues may be subject to substantial uncertainty
resulting from the lack of definitive judicial or administrative authority and
interpretations applicable thereto. THEREFORE, ALL HOLDERS OF COMMON STOCK,
WARRANTS AND OPTIONS ARE URGED TO CONSULT WITH THEIR TAX ADVISORS REGARDING THE
SPECIFIC TAX CONSEQUENCES TO THEM OF THE RIGHTS OFFERING AND EMPLOYEE
PARTICIPATION, AS APPLICABLE, INCLUDING THE EFFECTS OF FEDERAL, STATE, LOCAL,
FOREIGN, AND OTHER TAX LAWS.
 
TAX CONSEQUENCES TO HOLDERS OF COMMON STOCK
 
     Issuance of Rights. Existing law is not clear as to whether the
distribution of Rights to the existing stockholders would be characterized as a
distribution under Section 305(a) of the Code or, alternatively, as a
distribution under Sections 301 and 305(b) of the Code. The Company believes
that it is most likely that the Rights Offering to existing stockholders will be
properly characterized as a Section 305(a) distribution. Assuming that the
Rights Offering to existing stockholders is properly characterized as a Section
305(a) distribution, the distribution of Rights to holders of Common Stock would
be nontaxable without regard to the Company's earnings and profits. If the
distribution of Rights to the existing stockholders were treated as a Section
301 distribution, and provided the Company has current or accumulated earnings
and profits, the fair
 
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<PAGE>   133
 
market value of the Rights distributed would be treated as dividends (taxable as
ordinary income) to the extent of such earnings and profits. To the extent that
the amount of the distribution exceeded the earnings and profits of the Company,
it would be treated first as a tax-free return of capital to the extent of the
holder's tax basis in the underlying Common Stock, and thereafter as capital
gain.
 
     Basis and Holding Period. If, as is most likely, the Rights Offering to
existing stockholders is properly characterized as a nontaxable Section 305(a)
distribution and either (i) the fair market value of the Rights on the date of
distribution is equal to 15% or more of the fair market value on the date of
issuance of the Common Stock with respect to which they are received or (ii) the
stockholder elects, in his or her federal income tax return of the taxable year
in which the Rights are received, to allocate part of the tax basis of the
Common Stock to the Rights, then upon exercise or transfer of the Rights, the
stockholder's tax basis in the Common Stock will be allocated between the Common
Stock and the Rights in proportion to the fair market values of each on the date
of the issuance of the Rights. Otherwise, as a nontaxable Section 305(a)
distribution, the tax basis of Rights received by a stockholder as a
distribution with respect to the stockholder's Common Stock will be zero. If,
however, the distribution of Rights to the existing stockholders were treated as
a taxable Section 301 distribution, each existing stockholder would have a tax
basis in the Rights that such stockholder received equal to the fair market
value of the Rights on the date of distribution of the Rights and the holder's
tax basis in his or her Common Stock would be reduced by the nontaxable portion
of the distribution, if any (as discussed above).
 
     If, as is most likely, the Rights Offering to the existing stockholders is
treated as a nontaxable Section 305(a) distribution, the holding period of an
existing stockholder with respect to Rights received as a distribution on the
stockholder's Common Stock will include the stockholder's holding period for the
Common Stock with respect to which the Rights were issued. If, however, the
Rights Offering to the existing stockholders were treated as a taxable Section
301 distribution, the existing stockholders would have a holding period that
begins on the day following the date of distribution of the Rights.
 
     Transfer of Rights. An existing stockholder who sells Rights received in
the Rights Offering rather than exercising them will recognize capital gain or
loss equal to the difference between the sale proceeds and the stockholder's tax
basis, if any, in the Rights sold.
 
     Lapse of Rights. If, as is most likely, the Rights Offering to the existing
stockholders is treated as a nontaxable Section 305(a) distribution, an existing
stockholder who allows Rights received by him or her to lapse without exercising
or selling them will not recognize any gain or loss, and, as the Rights were
neither exercised nor sold, no adjustment will be made to the tax basis of the
Common Stock, if any, owned by the stockholder. If, however, the Rights Offering
to the existing stockholders were treated as a taxable Section 301 distribution,
an existing stockholder who allows the Rights to lapse would have a capital loss
in an amount equal to his or her tax basis in the Rights (as discussed above),
and no adjustment would be made to the tax basis of the Common Stock, if any,
owned by the stockholder.
 
     Exercise of Rights; Basis and Holding Period of Common Stock. An existing
stockholder will not recognize any gain or loss upon the exercise of Rights. The
tax basis of the Common Stock acquired through exercise of Rights will be equal
to the sum of the Subscription Price therefor and the holder's tax basis in the
Rights, if any. The holding period for the Common Stock acquired through
exercise of the Rights will begin on the day following the date the Rights are
considered exercised.
 
TAX CONSEQUENCES TO HOLDERS OF WARRANTS
 
     Exercise of Preemptive Rights. All warrant holders have preemptive rights
pursuant to the terms of their warrants. See "The Stock Offering -- Preemptive
Rights of Warrant Holders." The Company has the obligation to offer the warrant
holders the opportunity to exercise their preemptive rights in connection with
the Equity Financings. Pursuant to such preemptive rights, the warrant holders
will have the right to subscribe for Common Stock at the price of $16.75 per
share or the right to be issued Rights in the Rights Offering. Although not free
from doubt due to the lack of directly applicable authority, the Company
believes that the triggering and/or exercise of preemptive rights of warrant
holders who do not elect to receive Rights most likely will be treated as a
nontaxable purchase of Common Stock pursuant to a previously bargained for
                                       131
<PAGE>   134
 
contractual right. If the triggering and/or exercise of preemptive rights is not
treated as a nontaxable purchase of Common Stock, the transaction could be
treated as a taxable distribution of the right to acquire Common Stock.
Therefore, all warrant holders who exercise their preemptive rights should
consult and rely upon their own tax advisors as to the specific tax consequences
to them relating to the triggering and/or exercise of their preemptive rights.
 
     Issuance of Rights. The Company believes the distribution of Rights to
warrant holders pursuant to the Rights Offering most likely would be
characterized as a taxable distribution of the right to acquire Common Stock and
not as a nontaxable distribution under Section 305(a) of the Code nor as a
distribution under Sections 301 and 305(b) of the Code. Therefore, the holders
of warrants would recognize taxable income for federal income tax purposes in
connection with the receipt of Rights in an amount equal to the then-fair market
value of the Rights received on the date of their distribution.
 
     Basis and Holding Period. The tax basis of Rights received by a warrant
holder as a distribution in respect of the holder's warrants will equal the
Rights' fair market value when issued and his or her holding period will
commence on the day following the date of distribution of the Rights.
 
     Transfer of Rights. A warrant holder who sells Rights received in the
Rights Offering rather than exercising them will recognize capital gain or loss
in an amount equal to the difference between the sale proceeds and the holder's
basis in the Rights sold.
 
     Lapse of Rights. Warrant holders who allow Rights received by them pursuant
to the Rights Offering to lapse will recognize capital loss in an amount equal
to the holder's tax basis.
 
     Exercise of Rights; Basis and Holding Period of Common Stock. Warrant
holders will not recognize any gain or loss upon the exercise of Rights. The tax
basis of the Common Stock acquired through exercise of the Rights will be equal
to the sum of the Subscription Price therefor and the holder's tax basis in the
Rights. The holding period for the Common Stock acquired through exercise of the
Rights will begin on the day following the date the Rights are considered
exercised.
 
TAX CONSEQUENCES TO HOLDERS OF RIGHTS RECEIVED IN CONNECTION WITH EMPLOYEE
PARTICIPATION
 
     Issuance of Rights. The Company will grant an opportunity to participate in
the Employee Participation only to its current equity incentive plan
participants. Therefore, the Company believes that Rights issued pursuant to the
Employee Participation should be treated as issued in connection with the
performance of services for federal income tax purposes and, thus, the federal
income tax treatment resulting from the issuance of Rights to employees and
consultants pursuant to the Employee Participation should be governed by Section
83 of the Code. Accordingly, no gain or loss will be recognized by the employees
and consultants receiving Rights pursuant to the Employee Participation provided
that the Rights do not have a readily ascertainable fair market value within the
meaning of Treasury Regulation Section 1.83-7(b) when issued. The Company
believes that Rights issued pursuant to the Employee Participation should not be
treated as having a readily ascertainable fair market value at the time of grant
because the Rights issued pursuant to the Employee Participation are
non-transferable and, thus, will not be actively traded on an established market
and the fair market value of the rights otherwise cannot be measured with
reasonable accuracy, as required under the Treasury Regulations.
 
     Lapse of Rights. Employees and consultants who allow Rights received by
them pursuant to the Employee Participation to lapse will not recognize any gain
or loss, and no adjustment will be made to the basis, if any, of any other
ownership interest in the Company owned by the holders of the Rights.
 
     Exercise of Rights; Basis and Holding Period of Common Stock. If an
employee or consultant exercises Rights received pursuant to the Employee
Participation, with respect to the Common Stock so purchased, the holder will
recognize taxable income at the time the Common Stock is purchased in an amount
equal to the amount, if any, that the fair market value of the Common Stock
determined at the time of exercise exceeded the Subscription Price. Any income
so recognized would be taxed at ordinary income rates and any gain or loss
recognized on the subsequent disposition of the Common Stock so acquired would
be treated as a capital gain or loss.
                                       132
<PAGE>   135
 
     Under these, circumstances, the tax basis of the Common Stock acquired
through the exercise of Rights will be equal to the fair market value of the
Common Stock on the date of exercise and the holding period for the Common Stock
acquired through the exercise of the Rights generally begins on the day
following exercise.
 
     EMPLOYEES AND CONSULTANTS SHOULD CONSULT WITH THEIR OWN TAX ADVISORS
REGARDING THE SPECIFIC CONSEQUENCES TO THEM UPON THE EXERCISE OF RIGHTS.
 
                                 LEGAL MATTERS
 
     The validity of the Rights and the Common Stock offered hereby will be
passed upon for the Company by Riordan & McKinzie, a Professional Corporation,
Los Angeles, California. A principal of Riordan & McKinzie is the beneficial
owner of 3,000 shares of Common Stock of the Company. In addition, principals of
Riordan & McKinzie have made commitments to an investment fund that will, among
other investments, make a commitment of capital to IP II. It is anticipated that
as a result of IP II's investment in the Company the aggregate market value of
the indirect interests of the firm's principals in the Common Stock will exceed
$50,000.
 
                                    EXPERTS
 
     The consolidated financial statements of Superior National and Pac Rim as
of December 31, 1997 and 1996 and for each of the years in the three-year period
ended December 31, 1997, have been included herein and elsewhere in this
Prospectus and the Registration Statement in reliance upon the reports of KPMG
Peat Marwick LLP, independent certified public accountants, appearing elsewhere
herein and upon the authority of such firm as experts in accounting and
auditing.
 
     The combined financial statements of the insurance operations of BIG as of
December 31, 1997 and 1996 and for each of the three years in the period ended
December 31, 1997, included in this Prospectus and Registration Statement have
been audited by Deloitte & Touche LLP, independent auditors, as stated in their
reports appearing herein and elsewhere in the Registration Statement, and have
been so included in reliance upon the reports of such firm given upon their
authority as experts in accounting and auditing.
 
                                       133
<PAGE>   136
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS OF SUPERIOR
  NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES...........  F-1
INDEPENDENT AUDITORS' REPORT................................  F-3
AUDITED CONSOLIDATED FINANCIAL STATEMENTS:
  Consolidated Balance Sheets as of December 31, 1997 and
     1996...................................................  F-4
  Consolidated Statements of Operations for the years ended
     December 31, 1997, 1996 and 1995.......................  F-5
  Consolidated Statements of Changes in Stockholders' Equity
     for the years ended December 31, 1997, 1996 and 1995...  F-6
  Consolidated Statements of Cash Flows for the years ended
     December 31, 1997, 1996 and 1995.......................  F-7
  Notes to Consolidated Financial Statements................  F-8
FINANCIAL STATEMENTS SCHEDULES:
  Schedule I:  Condensed Financial Information of the
               Registrant, Superior National Insurance
               Group, Inc...................................  F-29
  Schedule II:  Valuation and Qualifying Accounts and
                Reserves....................................  F-33
  Schedule V:  Supplemental Insurance Information,
               Reinsurance and Supplemental Property and
               Casualty Insurance Information...............  F-34
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS:
  Condensed Consolidated Balance Sheets as of March 31, 1998
     (unaudited) and December 31, 1997......................  F-37
  Condensed Consolidated Statements of Income for the three
     months ended March 31, 1998 (unaudited) and March 31,
     1997 (unaudited).......................................  F-38
  Condensed Consolidated Statement of Changes in
     Stockholders' Equity for the three months ended March
     31, 1998 (unaudited) and year ended December 31,
     1997...................................................  F-39
  Condensed Consolidated Statements of Cash Flows for the
     three months ended March 31, 1998 (unaudited) and March
     31, 1997 (unaudited)...................................  F-40
  Notes to Condensed Consolidated Financial Statements
     (unaudited)............................................  F-41
 
    THE INSURANCE OPERATIONS OF BUSINESS INSURANCE GROUP, INC
 
INDEX TO COMBINED FINANCIAL STATEMENTS OF THE INSURANCE
  OPERATIONS OF BUSINESS INSURANCE GROUP, INC...............  F-44
INDEPENDENT AUDITORS' REPORT................................  F-45
COMBINED FINANCIAL STATEMENTS:
  Combined Balance Sheets as of December 31, 1997 and
     1996...................................................  F-46
  Combined Statements of Operations for the years ended
     December 31, 1997, 1996 and 1995.......................  F-47
  Combined Statements of Stockholder's Equity for the years
     ended December 31, 1997, 1996 and 1995.................  F-48
  Combined Statements of Cash Flows for the years ended
     December 31, 1997, 1996 and 1995.......................  F-49
  Notes to Combined Financial Statements....................  F-50
UNAUDITED CONDENSED COMBINED FINANCIAL STATEMENTS:
  Condensed Combined Balance Sheets as of March 31, 1998
     (unaudited) and December 31,
     1997...................................................  F-65
  Condensed Combined Statement of Operations for the three
     months ended March 31, 1998 and 1997...................  F-66
  Condensed Combined Statement of Changes in Stockholder's
     Equity for the three months ended March 31, 1998
     (unaudited) and year ended December 31, 1997...........  F-67
  Condensed Combined Statements of Cash Flows for the three
     months ended March 31, 1998 (unaudited) and March 31,
     1997 (unaudited).......................................  F-68
  Notes to Condensed Combined Financial Statements..........  F-69
</TABLE>
 
                                       F-1
<PAGE>   137
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
                   PAC RIM HOLDING CORPORATION
 
CONSOLIDATED FINANCIAL STATEMENTS:
INDEPENDENT AUDITORS' REPORT................................  F-70
  Consolidated Balance Sheets as of December 31, 1996
     (restated) and 1995....................................  F-71
  Consolidated Statements of Operations for the years ended
     December 31, 1996 (restated), 1995, and 1994...........  F-72
  Consolidated Statements of Stockholders' Equity for the
     years ended December 31, 1996 (restated), 1995, and
     1994...................................................  F-73
  Consolidated Statements of Cash Flows for the years ended
     December 31, 1996 (restated), 1995, and 1994...........  F-74
  Notes to Consolidated Financial Statements................  F-75
</TABLE>
 
                                       F-2
<PAGE>   138
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
Superior National Insurance Group, Inc.:
 
     We have audited the consolidated financial statements of Superior National
Insurance Group, Inc. and subsidiaries as listed in the accompanying index. In
connection with our audits of the consolidated financial statements, we also
have audited the financial statement schedules as listed in the accompanying
index. These consolidated financial statements and financial statement schedules
are the responsibility of the Company's management. Our responsibility is to
express an opinion on these consolidated financial statements and financial
statement schedules based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Superior
National Insurance Group, Inc. and subsidiaries as of December 31, 1997 and
1996, and the results of their operations and their cash flows for each of the
years in the three-year period ended December 31, 1997, in conformity with
generally accepted accounting principles. Also, in our opinion, the related
financial statement schedules, when considered in relation to the basic
consolidated financial statements taken as a whole, present fairly, in all
material respects, the information set forth therein.
 
                                          KPMG PEAT MARWICK LLP
 
Los Angeles, California
March 27, 1998
 
                                       F-3
<PAGE>   139
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
                           DECEMBER 31, 1997 AND 1996
 
<TABLE>
<CAPTION>
                                                                1997         1996
                                                              ---------    ---------
                                                              (IN THOUSANDS, EXCEPT
                                                                   SHARE DATA)
<S>                                                           <C>          <C>
                                       ASSETS
Investments:
  Bonds and Notes
    Available-for-sale, at market (cost: 1997, $203,373;
     1996, $46,549).........................................  $205,214     $ 46,330
  Equity securities, at market
    Common stock (cost: 1997, $1,356; 1996, $1,199).........     1,526        1,173
  Cash and Invested cash (Restricted cash: 1997, $651; 1996,
    $297)...................................................    35,376      100,487
  Restricted investment.....................................        --        1,450
                                                              --------     --------
         TOTAL INVESTMENTS..................................   242,116      149,440
Reinsurance recoverable:
  Paid and unpaid claims and claim adjustment expenses......    53,082       25,274
  Premiums receivable (less allowance for doubtful accounts
    of $800 in 1997 and $300 in 1996).......................    24,364        9,390
  Earned but unbilled premiums receivable...................    12,524        5,251
  Accrued investment income.................................     2,661        1,035
  Deferred policy acquisition costs.........................     5,879        3,042
  Deferred income taxes.....................................    12,200        9,520
  Funds held by reinsurer...................................     5,152        1,948
  Receivable from reinsurer.................................        --       93,266
  Prepaid reinsurance premiums..............................     1,598        1,039
  Goodwill..................................................    35,887           --
  Prepaid and other.........................................    21,106        7,364
                                                              --------     --------
         TOTAL ASSETS.......................................  $416,569     $306,569
                                                              ========     ========
                        LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities:
  Claims and claim adjustment expenses......................  $201,255     $115,529
  Unearned premiums.........................................    12,913        9,702
  Reinsurance payable.......................................     3,412          874
  Long-term debt............................................        30       98,961
  Policyholder dividends....................................     1,370           --
  Capital lease obligation..................................     7,626           --
  Accounts payable and other liabilities....................    28,868       12,741
                                                              --------     --------
         TOTAL LIABILITIES..................................   255,474      237,807
1994 PREFERRED SECURITIES ISSUED BY AFFILIATE; authorized
  1,100,000 shares; issued and outstanding 1,013,753 shares
  in 1996...................................................        --       23,571
COMPANY-OBLIGATED TRUST PREFERRED SECURITIES OF SUBSIDIARY
  TRUST HOLDING SOLELY SENIOR SUBORDINATED NOTES OF SNIG;
  $1,000 face per share; issued and outstanding 105,000
  shares in 1997............................................   101,277           --
                                STOCKHOLDERS' EQUITY
Common stock, $0.01 par value; authorized 25,000,000 shares;
  issued and outstanding 5,871,279 shares in 1997 and
  3,446,492 shares in 1996..................................        59           34
Paid-in capital excess of par...............................    34,242       15,988
Unrealized (loss) gain on investments, net of taxes.........     1,327         (162)
Paid-in capital -- warrants.................................     2,206        2,206
Retained earnings...........................................    21,984       27,125
                                                              --------     --------
         NET STOCKHOLDERS' EQUITY...........................    59,818       45,191
                                                              --------     --------
         TOTAL LIABILITIES, PREFERRED SECURITIES AND NET
          STOCKHOLDERS' EQUITY..............................  $416,569     $306,569
                                                              ========     ========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
                                       F-4
<PAGE>   140
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                1997       1996       1995
                                                              --------    -------    -------
                                                                  (IN THOUSANDS, EXCEPT
                                                                     PER SHARE DATA)
<S>                                                           <C>         <C>        <C>
REVENUES:
  Premiums written, net of reinsurance ceded................  $136,929    $87,715    $89,139
  Net change in unearned premiums...........................     3,991        933        596
                                                              --------    -------    -------
  Net premiums earned.......................................   140,920     88,648     89,735
  Net investment income.....................................    12,674      7,769      9,784
                                                              --------    -------    -------
        TOTAL REVENUES......................................   153,594     96,417     99,519
                                                              --------    -------    -------
EXPENSES:
  Claims and claim adjustment, net of reinsurance recoveries
    of $32,383, $6,064 and $2,418 in 1997, 1996 and 1995
    respectively............................................    90,447     55,638     53,970
  Commissions, net of reinsurance ceding commissions of
    $4,868, $2,030 and $1,350 in 1997, 1996 and 1995
    respectively............................................    13,838     10,426     11,881
  Policyholder dividends....................................        --     (5,927)    (5,742)
  Interest..................................................     6,335      7,527      9,619
  General and administrative
    Underwriting............................................    23,857     23,712     17,566
    Other...................................................       817       (186)       536
    Goodwill................................................     1,039         --         --
                                                              --------    -------    -------
        TOTAL EXPENSES......................................   136,333     91,190     87,830
                                                              --------    -------    -------
Income before income taxes, preferred securities dividends
  and accretion, discontinued operations, and extraordinary
  items.....................................................    17,261      5,227     11,689
Income tax expense (benefit)................................     6,437      1,597        (12)
                                                              --------    -------    -------
Income before preferred securities dividends and accretion,
  discontinued operations and extraordinary items...........    10,824      3,630     11,701
Preferred Securities dividends and accretion, net of income
  tax benefit of $1,260, $858 and $767 in 1997, 1996 and
  1995 respectively.........................................    (2,445)    (1,667)    (1,488)
Trust Preferred Securities dividends and accretion, net of
  income tax benefit of $321 in 1997........................      (624)        --         --
Loss from operations of discontinued property and casualty
  operations, net of income tax benefit of $5,070 in 1995...        --         --     (9,842)
Extraordinary loss on retirement of long-term debt, net of
  income tax benefit of $5,315..............................   (10,317)        --         --
Extraordinary loss on retirement of long-term debt, net of
  income tax benefit of $785................................    (1,524)        --         --
Extraordinary loss on redemption of Pac Rim's outstanding
  debentures, net of income tax benefit of $327.............      (635)        --         --
Extraordinary loss on retirement of preferred securities,
  net of income tax benefit of $134.........................      (259)        --         --
Extraordinary loss on early retirement of Imperial Bank loan
  net of income tax benefit of $83..........................      (161)        --         --
                                                              --------    -------    -------
        NET (LOSS) INCOME...................................  $ (5,141)   $ 1,963    $   371
                                                              ========    =======    =======
BASIC EARNINGS PER SHARE:
  Income before preferred securities dividends and
    accretion, and extraordinary items......................  $   2.06    $  1.06    $  3.41
  Preferred securities dividends and accretion..............     (0.58)     (0.49)     (0.43)
  Discontinued operations...................................        --         --      (2.87)
  Extraordinary items.......................................     (2.46)        --         --
                                                              --------    -------    -------
        NET (LOSS) INCOME...................................  $  (0.98)   $  0.57    $  0.11
                                                              ========    =======    =======
DILUTED EARNINGS PER SHARE:
  Income before preferred securities dividends and
    accretion, and extraordinary items......................  $   1.54    $  0.75    $  2.97
  Preferred securities dividends and accretion..............     (0.44)     (0.34)     (0.38)
  Discontinued operations...................................        --         --      (2.50)
  Extraordinary items.......................................     (1.84)        --         --
                                                              --------    -------    -------
        NET INCOME..........................................  $  (0.74)   $  0.41    $  0.09
                                                              ========    =======    =======
</TABLE>
 
          See accompanying notes to consolidated financial statements.
                                       F-5
<PAGE>   141
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                      NET
                                                    UNREALIZED    UNREALIZED
                                 COMMON STOCK          GAIN       GAIN (LOSS)
                             --------------------     (LOSS)     ON AVAILABLE-    PAID IN                    TOTAL
                              SHARES     $.01 PAR   ON EQUITY      FOR-SALE      CAPITAL --   RETAINED   STOCKHOLDERS'
                              ISSUED      VALUE     SECURITIES    INVESTMENTS     WARRANTS    EARNINGS      EQUITY
                             ---------   --------   ----------   -------------   ----------   --------   -------------
                                                     (AMOUNTS IN THOUSANDS, EXCEPT SHARE DATA)
<S>                          <C>         <C>        <C>          <C>             <C>          <C>        <C>
Balance at December 31,
  1994.....................  3,429,873   $15,941         --         $(2,574)       $2,206     $24,791       $40,364
 
Net Income.................         --        --         --              --            --         371           371
Unrealized gain on equity
  securities...............         --        --          2              --            --          --             2
Change in unrealized loss
  on available-for-sale
  investments, net of
  taxes....................         --        --         --           2,741            --          --         2,741
Stock issued under stock
  option plan..............        500         2         --              --            --          --             2
                             ---------   -------       ----         -------        ------     -------       -------
Balance at December 31,
  1995.....................  3,430,373    15,943          2             167         2,206      25,162        43,480
                             ---------   -------       ----         -------        ------     -------       -------
 
Net Income.................         --        --         --              --            --       1,963         1,963
Unrealized gain on equity
  securities...............         --        --        (19)             --            --          --           (19)
Change in unrealized loss
  on available-for-sale
  investments, net of
  taxes....................         --        --         --            (312)           --          --          (312)
Stock issued under a stock
  option plan..............      3,100        12         --              --            --          --            12
Common stock issued under a
  stock incentive plan.....     13,019        67         --              --            --          --            67
                             ---------   -------       ----         -------        ------     -------       -------
Balance at December 31,
  1996.....................  3,446,492    16,022        (17)           (145)        2,206      27,125        45,191
                             ---------   -------       ----         -------        ------     -------       -------
 
Net Loss...................         --        --         --              --            --      (5,141)       (5,141)
Unrealized gain on equity
  securities...............         --        --        129              --            --          --           129
Change in unrealized gain
  on available-for-sale
  investments, net of
  taxes....................         --        --         --           1,360            --          --         1,360
Common stock issued........  2,390,438    18,000         --              --            --          --        18,000
Stock issued under a stock
  option plan..............     22,127       105         --              --            --          --           105
Common stock issued under a
  stock incentive plan.....     12,222       174         --              --            --          --           174
                             ---------   -------       ----         -------        ------     -------       -------
Balance at December 31,
  1997.....................  5,871,279   $34,301       $112         $ 1,215        $2,206     $21,984       $59,818
                             =========   =======       ====         =======        ======     =======       =======
</TABLE>
 
          See accompanying notes to consolidated financial statements.
                                       F-6
<PAGE>   142
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                1997       1996       1995
                                                              --------   --------   ---------
                                                                  (AMOUNTS IN THOUSANDS)
<S>                                                           <C>        <C>        <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net (loss) income.........................................  $ (5,141)  $  1,963   $     371
                                                              --------   --------   ---------
  Adjustments to reconcile net income to net cash provided
    by (used in) operating activities:
    Amortization of bonds and preferred stock...............    (1,073)    (1,581)     (3,575)
    Amortization of long-term debt..........................        68         --          --
    Loss/(gain) on sale of investments......................        98        (31)        525
    Gain on sale of Centre Re investments...................        --     (2,036)     (4,891)
    Amortization of goodwill................................     1,039         --          --
    Extraordinary loss......................................    12,896         --          --
    Interest expense on long-term debt......................     3,581         --          --
    Preferred securities dividends and accretion............     3,069      2,526       2,255
    (Increase) decrease in reinsurance balances
     receivable.............................................   (23,789)    14,339      28,516
    (Increase) decrease in premiums receivable..............    (1,848)     2,184       6,901
    (Increase) decrease in earned but unbilled premiums
     receivable.............................................    (3,131)    (2,101)      3,336
    (Increase) decrease in accrued investment income........      (986)       792        (491)
    (Increase) decrease in deferred policy acquisition
     costs..................................................    (2,837)      (262)        125
    Decrease in income taxes receivable.....................        --         --       1,721
    Decrease (increase) in deferred taxes...................     6,433        735      (5,853)
    Increase in funds held by reinsurer.....................    (3,204)      (976)       (972)
    Increase in prepaid reinsurance premiums................    (2,406)      (287)        (88)
    Decrease (increase) in other assets.....................     1,637     (1,287)     (1,413)
    Decrease in claims and claim adjustment expense
     reserves...............................................   (24,523)   (25,966)    (29,763)
    Decrease in unearned premium reserves...................    (3,648)      (645)       (508)
    Increase (decrease) in reinsurance payable..............     2,538        504      (2,835)
    Decrease in policyholder dividends payable..............        --     (8,094)    (10,970)
    Decrease in discontinued operations.....................        --         --      (4,223)
    (Decrease) increase in accounts payable and other
     liabilities............................................   (11,143)     5,321      (1,994)
                                                              --------   --------   ---------
    Total adjustments.......................................   (47,229)   (16,865)    (24,197)
                                                              --------   --------   ---------
        Net cash used in operating activities...............   (52,370)   (14,902)    (23,826)
                                                              --------   --------   ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Paid-in-capital -- stock options taken..................       279         79           2
    Proceeds from issuance of common stock..................    18,000         --          --
    Proceeds from Trust Preferred Securities net of $3.7
     million issuance.......................................   101,272         --          --
    Long-term debt -- Chase Manhattan Bank..................    41,257         --          --
    Retirement of long-term debt -- Chase Manhattan Bank....   (44,000)        --          --
    Retirement of 1994 Preferred Securities.................   (27,668)        --          --
    Retirement of long-term debt............................    (7,250)    (2,660)     (1,200)
    Prepayment penalty on long-term debt....................      (244)        --          --
    Funding of discontinued operations......................    (4,357)        --          --
    Proceeds from Chase Financing...........................        --     93,091          --
                                                              --------   --------   ---------
        Net cash provided by (used in) financing
        activities..........................................    77,289     90,510      (1,198)
                                                              --------   --------   ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of bonds and notes:
    Investments available-for-sale..........................  (226,749)   (43,257)     (4,611)
    Investment funds withheld from reinsurers...............        --    (88,568)   (204,577)
  Purchases of common stock.................................    (1,496)      (513)       (680)
  (Increase) in receivable from reinsurer...................        --    (93,266)         --
  Purchase of Pacific Rim Holding Company...................   (44,016)        --          --
  Investments and cash allocated to discontinued
    operations..............................................        --         --      (1,581)
  Sales of bonds and notes: Investments
    available-for-sale......................................   109,082     25,343      17,643
  Maturities of bonds and notes:
    Investments held-to-maturity............................        --         --       2,250
    Investments available-for-sale..........................    15,042     12,771       3,035
  Sales and maturities of funds withheld from reinsurers....        --    206,548     191,238
  Sales of equity securities................................     1,197         --          --
  Net decrease in invested cash.............................    55,460        983      26,062
                                                              --------   --------   ---------
  Net cash (used in) provided by investing activities.......   (91,480)    20,041      28,779
                                                              --------   --------   ---------
  Net (decrease) increase in cash...........................   (66,561)    95,649       3,755
  Cash and invested cash at beginning of period.............   101,937      6,288       2,533
                                                              --------   --------   ---------
  Cash and invested cash at end of period...................  $ 35,376   $101,937   $   6,288
                                                              ========   ========   =========
  Supplemental disclosure of cash flow information:
    Cash paid during the year for income taxes..............  $      4   $      4   $       4
                                                              ========   ========   =========
    Cash paid during the year for interest..................  $  2,803   $    641   $     808
                                                              ========   ========   =========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
                                       F-7
<PAGE>   143
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           DECEMBER 31, 1997 AND 1996
 
(1)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Principles of Consolidation
 
     The consolidated financial statements include the accounts of Superior
National Insurance Group, Inc. ("SNIG") and all subsidiaries (together with
SNIG, the "Company"). The Company's principal insurance subsidiaries
(collectively referred to as "Superior Pacific"), Superior National Insurance
Company ("SNIC") and Superior Pacific Casualty Company ("SPCC"), are licensed to
write workers' compensation insurance and commercial property and casualty
insurance in 20 states and the District of Columbia.
 
     During the third quarter of 1993, the Company adopted a plan to discontinue
underwriting commercial property and casualty risks. Earned premiums reported in
1997, 1996, and 1995 reflect workers' compensation premiums from policies that
were primarily located in California.
 
     The Company's consolidated financial statements have been prepared on the
basis of generally accepted accounting principles that vary in certain respects
from accounting practices prescribed or permitted by state insurance regulatory
authorities. The results of all significant intercompany transactions have been
eliminated.
 
     Certain reclassifications have been made to prior year financial statements
to conform to the 1997 presentation.
 
  Acquisition
 
     On April 11, 1997, the Company acquired all of the outstanding stock of Pac
Rim Holding Corporation ("Pac Rim") for aggregate consideration of $42.0 million
in cash. This consideration resulted in payments of $20.0 million to Pac Rim
stockholders, $20.0 million to Pac Rim's convertible debenture holders, and $2.0
million to Pac Rim's warrant and option holders. In addition, the Company
incurred $2.0 million in transaction fees and related expenses. The Company
financed the acquisition of Pac Rim through a $44.0 million term loan and the
sale of $18 million of newly issued shares of common stock. The term loan was
subsequently retired from funds raised from the sale of $105 million of 10.75%
Trust Preferred Securities. As a result of the term loan's being retired the
Company recorded an extraordinary loss, net of federal income taxes, of $1.5
million.
 
     The transaction resulted in $36.9 million in goodwill that is being
amortized on a straight line basis over 27.5 years. The transaction was
accounted for using the purchase method and the results of operations since the
date of the acquisition have been included in operations. The transaction's
designated accounting effective date is April 1, 1997.
 
     The balance sheet of Pac Rim at the acquisition date included the following
assets: investments of $105,913, cash of $2,627, receivables of $17,268, and
other assets of $22,272. Liabilities assumed in the acquisition included
unearned premiums of $6,859, claims and claim adjustment expense reserves of
$107,743, and other liabilities of $32,289.
 
                                       F-8
<PAGE>   144
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The unaudited pro forma condensed consolidated results of operations
presented below assume the transaction occurred had the acquisition taken place
at the beginning of each period presented.
 
<TABLE>
<CAPTION>
                                                              PRO FORMA RESULTS FOR THE YEAR
                                                                    ENDED DECEMBER 31,
                                                              -------------------------------
                                                                  1997               1996
                                                              ------------       ------------
                                                                   (IN THOUSANDS, EXCEPT
                                                                      PER SHARE DATA)
<S>                                                           <C>                <C>
Revenues....................................................    $174,550           $187,732
Loss before income taxes, preferred securities dividends and
  accretion, and extraordinary items........................    $   (253)          $(18,620)
Net (loss)..................................................    $(23,280)          $(23,226)
Basic earnings per share....................................    $  (4.43)          $  (3.01)
Diluted earnings per share..................................    $  (3.32)          $  (2.55)
</TABLE>
 
     These unaudited pro forma results are not necessarily indicative of the
results of operations that would have occurred had the acquisition taken place
at the beginning of each period or of future operations of the combined
companies.
 
  Reverse Stock Split
 
     Effective May 25, 1995, shareholders of SNIG approved a four-into-one
reverse split of SNIG's common stock. The purpose of the reverse split was to
increase the per-share price of the SNIG common stock in order to enhance public
trading of the common stock upon the effectiveness of the Company's registration
with the Securities and Exchange Commission. Consequently, the shares of common
stock and stock options information included in the accompanying consolidated
financial statements were prepared assuming the reverse stock split had been
outstanding at the beginning of all periods presented.
 
  Cash and Invested Cash
 
     Cash includes currency on hand and demand deposits with financial
institutions. Invested cash represents short-term, highly liquid investments,
readily convertible to known amounts of cash and near maturity such that there
is insignificant risk of changes in value because of changes in interest rates.
Invested cash is carried at cost, which approximates market.
 
  Investments
 
     Investments in debt instruments consist primarily of bonds and
collateralized mortgage obligations. Debt instruments and equities are
classified as (i) "held-to-maturity" (carried at amortized cost); (ii) "trading"
(carried at market with differences between cost and market being reflected in
the results of operations); or (iii) if not otherwise classified, as
"available-for-sale" (carried at market with differences between cost and market
being reflected as a separate component of stockholders' equity, net of
applicable income tax effect). The premiums and discounts on fixed maturities
and collateralized mortgage obligations are amortized using the scientific
method. Amortization and accretion of premiums and discounts on collateralized
mortgage obligations are adjusted for principal paydowns and changes in expected
maturities. Current market values of investments are obtained from published
sources. Declines in market value that are considered other than temporary are
charged to operations.
 
     The Company does not own any investments that qualify as derivatives as
defined by Statement of Financial Accounting Standard No. 119, "Disclosure About
Derivative Financial Investments and Fair Value of Financial Investments."
Securities not designated as held-to-maturity have been designated as available-
for-sale. The Company did not have any investments categorized as trading
securities. For determining realized gains or losses on securities sold, cost is
based on average cost.
 
                                       F-9
<PAGE>   145
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     Investments in equity securities are carried at fair value. Unrealized
gains or losses on equity securities are reflected, net of applicable tax, in
stockholders' equity.
 
  Premiums Receivable
 
     Superior Pacific records premiums receivable for both billed and unbilled
amounts. Unbilled premiums receivable, which are substantially all earned,
primarily represent Superior Pacific's estimate of the difference between
amounts billed on installment policies and the amount to be ultimately billed on
the policy. Unbilled premiums receivable also include estimated billings on
payroll reporting policies which were earned but not billed prior to year end.
Superior Pacific uses its historical experience to estimate earned but unbilled
amounts which are recorded as premiums receivable. These unbilled amounts are
estimates, and while the Company believes such amounts are reasonable, there can
be no assurance that the ultimate amounts received will equal the recorded
unbilled amounts.
 
     The ultimate collectability of the unbilled receivables can be affected to
a greater degree by general changes in the economy and the regulatory
environment than billed receivables due to the increased time required to
determine the billable amount. The Company attempts to consider these factors
when estimating the receivable for unbilled premiums.
 
  Deferred Policy Acquisition Costs
 
     Acquisition costs, consisting principally of commissions, premium taxes,
and certain marketing, policy issuance, and underwriting costs related to the
production of SNIC's workers' compensation business, are deferred and amortized
ratably over the terms of the policies. If recoverability of such costs is not
anticipated, the amounts not considered recoverable are charged to income. In
determining estimated recoverability, the computation gives effect to the
premium to be earned, related investment income, claims and claim adjustment
expenses, and certain other costs expected to be incurred as the premium is
earned.
 
     Policy acquisition costs incurred and amortized into income are as follows:
 
<TABLE>
<CAPTION>
                                                       1997        1996        1995
                                                     --------    --------    --------
<S>                                                  <C>         <C>         <C>
Balance at beginning of year.......................  $  3,042    $  2,780    $  2,905
Cost deferred during the year......................    22,814      17,132      18,163
Amortization charged to expense....................   (19,977)    (16,870)    (18,288)
                                                     --------    --------    --------
Balance at end of year.............................  $  5,879    $  3,042    $  2,780
                                                     ========    ========    ========
</TABLE>
 
  Claims and Claim Adjustment Expenses
 
     Claims and claim adjustment expenses are based on case-basis estimates of
reported claims and on estimates, based on experience and industry data, for
unreported claims and claim adjustment expenses. The provision for unpaid claims
and claim adjustment expenses, net of estimated salvage and subrogation, has
been established to cover the estimated net cost of incurred claims. The amounts
are necessarily based on estimates, and accordingly, there can be no assurance
the ultimate liability will not differ from such estimates.
 
     There is a high level of uncertainty inherent in the evaluation of the
required claims and claim adjustment expense reserves. Management has selected
ultimate claim and claim adjustment expenses that it believes will reasonably
reflect anticipated ultimate experience. The ultimate costs of such claims are
dependent upon future events, the outcomes of which are affected by many
factors. Claims reserving procedures and settlement philosophy, current and
perceived social and economic factors, inflation, current and future court
rulings and jury attitudes, and many other economic, scientific, legal,
political, and social factors all can have significant effects on the ultimate
costs of claims. Changes in Company operations and management philosophy also
may cause actual developments to vary from the past.
 
                                      F-10
<PAGE>   146
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
  Policyholder Dividends
 
     Prior to the inception of open rating in January 1995, policyholder
dividends served both as an economic incentive to employers for safe operations
and as a means of price differentiation; however, since open rating, the
consumer's preference has been for the lowest net price at a policy's inception.
This is evidenced by the decline in participating policies written by Superior
Pacific as a percent of total policies from 24% of workers' compensation
premiums in force at December 31, 1995 to 1% at December 31, 1996. A small
increase in the percentage of participating policies to 3% at December 31, 1997
is attributable to policies written in Arizona. In 1995, as a result of the
diminishing value of policyholder dividends, Superior Pacific's management
declared a moratorium in the payment of policyholder dividends. In December
1996, the Company discontinued policyholder dividend payments. Estimated amounts
to be returned to policyholders were accrued when the related premium was earned
by Superior Pacific. Dividends were paid to the extent that a surplus was
accumulated from premiums on workers' compensation policies.
 
  Premium Income Recognition
 
     Insurance premiums are earned ratably over the terms of the policies.
Unearned premiums are computed on a daily pro-rata basis.
 
  Income Taxes
 
     The Company files a consolidated Federal income tax return which includes
all qualifying subsidiaries.
 
     Deferred income taxes are provided for temporary differences between
financial statement and tax return bases using the asset and liability method,
in accordance with Statement of Financial Accounting Standard No. 109,
"Accounting for Income Taxes" ("SFAS 109"). Under the asset and liability
method, deferred taxes are measured using enacted tax rates in effect for the
year in which those temporary differences are expected to be settled. Tax rate
changes are accounted for in the year in which the tax law is enacted.
 
  Earnings per Share ("EPS")
 
     In February 1997, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standard No. 128, "Earnings per Share", which
requires presentation of basic and diluted earnings per share for all publicly
traded companies effective for fiscal years ending after December 15, 1997. Note
16 contains the required disclosures which make up the calculation of basic and
diluted earnings per share. The required restatement of prior years earnings per
share reflect an immaterial difference.
 
  Property, Equipment, Leasehold Improvements and Assets Under Capital Lease
 
     Property, equipment, and leasehold improvements are stated at cost, net of
accumulated depreciation and amortization. The accumulated depreciation and
amortization as of December 31, 1997 and 1996 was $2,207 and $4,289
respectively. Depreciation and amortization are provided principally on the
straight-line method over the estimated useful lives of the assets, or, if less,
the term of the lease. Property, equipment, and leasehold improvements are
included as a component of "Prepaid and other assets" on the consolidated
balance sheets.
 
  Use of Management Estimations
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts of assets, liabilities, and disclosures of
contingent assets and liabilities at the date of the financial statements. The
Company has provided such estimates for its workers' compensation claims and
claim adjustment expenses; discontinued operations; policyholder dividends;
earned but unbilled premiums; and deferred taxes balances in its financial
                                      F-11
<PAGE>   147
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
statements. While these estimates are based upon analyses performed by
management, outside consultants, and actuaries, the amounts the Company will
ultimately pay may differ materially from the amounts presently estimated.
 
  Stock-Based Compensation
 
     The Company has elected to follow Accounting Principles Board Opinion No.
25, "Accounting for Stock Issued to Employees" ("APB 25") and Related
Interpretations in accounting for its employee stock options.
 
  Business Relationships with Zurich
 
     Certain affiliates of Zurich Reinsurance Centre Holdings, Inc., a Delaware
corporation ("Zurich"), collectively own approximately 45% of SNIG's common
stock on a diluted basis, and approximately 36% of SNIG's issued and outstanding
common stock on a non-diluted basis.
 
     In March 1992, the Company issued warrants (the "Warrants") to purchase
1,616,886 shares of Common Stock in connection with the sale of its 14.5% Senior
Subordinated promissory notes in an aggregate principal amount of $11.0 million,
which notes have since been redeemed. The Warrants are exercisable at $4.00 per
share and expire April 1, 2002. International Insurance Investors, L.P. ("III"),
an affiliate of Zurich, originally purchased 1,474,306 of such Warrants (which
are held by International Insurance Advisers, Inc. pursuant to a revocable
agency relationship) with the remaining 142,580 Warrants being issued to
management. As of December 31, 1997 Warrants to purchase 1,566,465 shares of
Common Stock were outstanding, as Warrants to purchase 50,421 shares of Common
Stock held by management have since been retired upon the termination of their
employment with the Company.
 
     In June 1994 in connection with a $20.0 million investment in the Company
(and its affiliate, Superior National Capital, L.P.) by CentreLine Reinsurance
Limited ("CentreLine"), an affilate of Zurich, the Company issued to CentreLine
a warrant to purchase 579,356 shares of Common Stock at an exercise price of
$5.20 per share, which expires April 1, 2002.
 
(2)  INVESTMENTS
 
     The amortized cost and market values of bonds and notes classified as
available-for-sale at December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                         GROSS         GROSS
                                          AMORTIZED    UNREALIZED    UNREALIZED      FAIR
                                            COST         GAINS         LOSSES       VALUE
                                          ---------    ----------    ----------    --------
<S>                                       <C>          <C>           <C>           <C>
Available-for-sale:
  United States government agencies and
     authorities........................  $ 89,884       $  420        $(207)      $ 90,097
  Collateralized mortgage obligations...    72,478        1,100          (97)        73,481
  Corporate instruments.................    41,011          657          (32)        41,636
  State and political subdivisions......        --           --           --             --
                                          --------       ------        -----       --------
  Total available-for-sale..............  $203,373       $2,177        $(336)      $205,214
                                          ========       ======        =====       ========
</TABLE>
 
                                      F-12
<PAGE>   148
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The market values of equity securities as of December 31, 1997 are as
follows:
 
<TABLE>
<CAPTION>
                                                           GROSS         GROSS
                                            AMORTIZED    UNREALIZED    UNREALIZED     FAIR
                                              COST         GAINS         LOSSES      VALUE
                                            ---------    ----------    ----------    ------
<S>                                         <C>          <C>           <C>           <C>
Equity Securities:
  Corporate Instruments...................   $1,356         $171          $(1)       $1,526
                                             ------         ----          ---        ------
  Total Equity Securities.................   $1,356         $171          $(1)       $1,526
                                             ======         ====          ===        ======
</TABLE>
 
     The amortized cost and estimated market values of investments classified as
available for sale at December 31, 1997 by contractual maturity are shown below.
Expected maturities are likely to differ from contractual maturities because
borrowers may have the right to call or prepay obligations with or without
penalty. Mortgage-backed securities are included based upon the expected payout
pattern and duration of the fixed income security. Changes in interest rates,
investor expectations, and political agendas could cause the ultimate payout
pattern to differ.
 
<TABLE>
<CAPTION>
                                                               AVAILABLE FOR SALE
                                                              ---------------------
                                                              AMORTIZED      FAIR
                                                                COST        VALUE
                                                              ---------    --------
<S>                                                           <C>          <C>
Due in one year or less.....................................  $ 25,044     $ 25,086
Due after one year through five years.......................    44,254       44,710
Due after five years through ten years......................    42,101       42,776
Due after ten years.........................................    91,974       92,642
                                                              --------     --------
Total.......................................................  $203,373     $205,214
                                                              ========     ========
</TABLE>
 
     The amortized cost and market values of bonds and notes classified as
available for sale at December 31, 1996 are as follows:
 
<TABLE>
<CAPTION>
                                                          GROSS         GROSS
                                           AMORTIZED    UNREALIZED    UNREALIZED     FAIR
                                             COST         GAINS         LOSSES       VALUE
                                           ---------    ----------    ----------    -------
<S>                                        <C>          <C>           <C>           <C>
Available-for-sale:
  United States government agencies and
     authorities.........................   $22,596        $ 62         $(174)      $22,484
  Collateralized mortgage obligations....    12,989          --          (134)       12,855
  Corporate instruments..................     9,864          23           (20)        9,867
  State and political subdivisions.......     1,100          24            --         1,124
                                            -------        ----         -----       -------
  Total available-for-sale...............   $46,549        $109         $(328)      $46,330
                                            =======        ====         =====       =======
</TABLE>
 
     The market value of equity securities as of December 31, 1996 are as
follows:
 
<TABLE>
<CAPTION>
                                                           GROSS         GROSS
                                            AMORTIZED    UNREALIZED    UNREALIZED     FAIR
                                              COST         GAINS         LOSSES      VALUE
                                            ---------    ----------    ----------    ------
<S>                                         <C>          <C>           <C>           <C>
Equity Securities:
  Corporate Instruments...................   $1,199         $73           $(99)      $1,173
                                             ------         ---           ----       ------
  Total Equity Securities.................   $1,199         $73           $(99)      $1,173
                                             ======         ===           ====       ======
</TABLE>
 
                                      F-13
<PAGE>   149
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     A summary of net investment income for the years ended December 31, are as
follows:
 
<TABLE>
<CAPTION>
                                                          1997       1996      1995
                                                         -------    ------    -------
<S>                                                      <C>        <C>       <C>
Interest on bonds and notes............................  $ 9,124    $6,628    $ 9,310
Interest on invested cash..............................    4,068     1,609      1,297
Realized gains (losses)................................       44        31       (525)
Other..................................................      190        --         --
                                                         -------    ------    -------
Total investment income................................   13,426     8,268     10,082
Investment expense.....................................     (752)     (499)      (298)
                                                         -------    ------    -------
Net investment income..................................  $12,674    $7,769    $ 9,784
                                                         =======    ======    =======
</TABLE>
 
     Realized gains (losses) on investments for the years ended December 31, are
as follows:
 
<TABLE>
<CAPTION>
                                                              1997    1996    1995
                                                              ----    ----    -----
<S>                                                           <C>     <C>     <C>
Bonds and notes.............................................  $44     $31     $(525)
Equity securities...........................................   --      --        --
                                                              ---     ---     -----
Total.......................................................  $44     $31     $(525)
                                                              ===     ===     =====
</TABLE>
 
     The changes in unrealized gains (losses) on debt instruments held as
available-for-sale and equity security investments at December 31, are as
follows:
 
<TABLE>
<CAPTION>
                                                             1997     1996      1995
                                                            ------    -----    ------
<S>                                                         <C>       <C>      <C>
Bonds and notes...........................................  $2,060    $(472)   $4,154
Equity securities.........................................     196      (29)        2
                                                            ------    -----    ------
Total.....................................................  $2,256    $(501)   $4,156
                                                            ======    =====    ======
</TABLE>
 
     Proceeds from sales of bonds and notes held as available-for-sale for the
years ended December 31, 1997, 1996, and 1995 were $109,082, $25,343, and
$17,643, respectively. Gross gains of $176 and gross losses of $132 were
realized on those sales in 1997. Gross gains of $44 and gross losses of $13 were
realized on those sales in 1996. Gross gains of $4 and gross losses of $529 were
realized on those sales in 1995.
 
     Bonds and other securities with a market value of $180,447 at December 31,
1997, $127,112 at December 31, 1996 and $143,462 at December 31, 1995, were on
deposit with various insurance regulatory authorities. Additionally, see Note
(7) regarding investments held related to reinsurance contracts.
 
(3)  FAIR VALUE OF FINANCIAL INSTRUMENTS
 
     The following table represents the carrying amounts and estimated fair
values of the Company's financial liabilities at December 31, 1997 and 1996.
Statement of Financial Accounting Standard No. 107, "Disclosure about Fair Value
of Financial Instruments," ("SFAS 107") defines the fair value of a financial
instrument as the amount at which the instrument could be exchanged in a current
transaction between willing parties. Fair values with respect to investments are
presented in Note (2) and the fair value of all other investments approximates
their fair value.
 
                                      F-14
<PAGE>   150
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The carrying amounts shown in the table below are included in the
Consolidated Balance Sheet under the indicated options:
 
<TABLE>
<CAPTION>
                                                    1997                   1996
                                            --------------------    -------------------
                                            CARRYING      FAIR      CARRYING     FAIR
                                             AMOUNT      VALUE       AMOUNT      VALUE
                                            --------    --------    --------    -------
<S>                                         <C>         <C>         <C>         <C>
Financial liabilities:
Chase financing agreement.................  $     --    $     --    $91,681     $91,374
Imperial Bank debt........................  $     --    $     --    $ 7,250     $ 7,541
1994 Preferred Securities issued by
  affiliate...............................  $     --    $     --    $23,571     $19,998
Trust Preferred Securities issued by
  affiliate...............................  $101,277    $104,990    $    --     $    --
</TABLE>
 
     Fair value is estimated based on the quoted market prices for similar
issues or by discounting expected cash flows at the rates currently offered to
the Company for debt of the same remaining maturities. However, there can be no
assurances that in the event the assets and liabilities would be required to be
liquidated that the amounts received or due would be the amounts reflected
herein.
 
(4)  CLAIM AND CLAIM ADJUSTMENT EXPENSE RESERVES
 
     The activity in the claim and claim adjustment expense reserve account is
summarized as follows:
 
<TABLE>
<CAPTION>
                                                         YEARS ENDED DECEMBER 31,
                                                     --------------------------------
                                                       1997        1996        1995
                                                     --------    --------    --------
                                                          (AMOUNTS IN THOUSANDS)
<S>                                                  <C>         <C>         <C>
Beginning reserve, gross of reinsurance............  $115,529    $141,495    $171,258
Less: Reinsurance recoverable on unpaid losses.....    24,986      27,076      31,897
                                                     --------    --------    --------
Beginning reserve, net of reinsurance..............    90,543     114,419     139,361
Pac Rim reserves at acquisition....................   104,588          --          --
Provision for net claims and claim adjustment
  expenses
  For claims occurring in current year.............    95,826      57,614      58,842
  For claims occurring in prior years..............    (5,379)     (1,976)     (4,872)
                                                     --------    --------    --------
  Total claims and claim adjustment expenses.......    90,447      55,638      53,970
                                                     --------    --------    --------
Payments for net claims and claim adjustment
  expense:
  Attributable to insured events incurred in
     current year..................................   (37,945)    (19,816)    (19,732)
  Attributable to insured events incurred in prior
     years.........................................   (95,533)    (59,698)    (59,180)
                                                     --------    --------    --------
  Total claims and claim adjustment expense
     payments......................................  (133,478)    (79,514)    (78,912)
                                                     --------    --------    --------
Ending reserves, net of reinsurance................   152,100      90,543     114,419
Reinsurance recoverable on unpaid losses...........    49,155      24,986      27,076
                                                     --------    --------    --------
Ending reserves, gross of reinsurance..............  $201,255    $115,529    $141,495
                                                     ========    ========    ========
</TABLE>
 
     During 1997, the Company continued to experience decreased frequency of
claims and at the same time experienced an increase in claims severity for
accident years 1995 and thereafter. The Company's net claim and claim adjustment
expense ratio for accident year 1997 at the end of calendar year 1997 was 68.0%,
versus 65.0% and 65.6% for accident years 1996 and 1995, at their respective
calendar year ends.
 
     In 1997, the Company experienced approximately $5.4 million in favorable
development on net claim and claim adjustment expense reserves estimated at
December 31, 1996. This $5.4 million favorable development is the result of a
$10.8 million favorable development on ceded reserves for accident years 1996
and prior. The $10.8 million favorable development on ceded reserves is
attributable to SPCC and due to the post-acquisition
 
                                      F-15
<PAGE>   151
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
review of all open claim files and the subsequent adjustment to reserves, which
caused many claims to have incurred claim and claim adjustment expenses in
excess of the retention on SPCC's reinsurance treaties. The $10.8 million
favorable development is offset by a $5.4 million adverse development on direct
reserves attributable to the accident years 1995 and 1996.
 
     In 1996, the Company experienced approximately $2.0 million in favorable
development on net claims and claim adjustment expense reserves estimated at
December 31, 1995. This $2.0 million favorable development is the result of $8.4
million in favorable development on direct reserves for accident years 1994 and
prior. The favorable development was offset in part by $4.1 million adverse
development on direct reserves for accident year 1995, and $2.3 million adverse
development on ceded reserves for accident years 1995 and prior. The Company's
1995 accident year net claims and claim adjustment expense ratio for accident
year 1995 at the end of calendar year 1995 was 65.6%, verses 74.6% at the end of
the 1996 calendar year. Offsetting the favorable development in large part was
the re-estimation during 1995 of reinsurance receivables recorded at December
31, 1994, from approximately $66.2 million to approximately $59.9 million at
December 31, 1995.
 
     During 1995, the Company experienced approximately $8.6 million of
favorable development on direct claim and claim adjustment expense reserves
estimated at December 31, 1994. Management believes the favorable development
resulted from the Company's improved claims management controls and decreased
claim severity, particularly in the medical component of the workers'
compensation line.
 
(5)  DISCONTINUED OPERATIONS
 
     During the third quarter of 1993, the Company adopted a plan to discontinue
underwriting commercial property and casualty risks. As a result, the Company
recorded a pre-tax charge to income of $2,991 for estimated operating losses
during the phase-out period.
 
     During the second quarter of 1995, the Company increased its reserves by
approximately $15 million for discontinued operations for accident years 1994
and prior. This increase in claims and claim adjustment expense reserves from
the original estimate at the measurement date resulted from increased frequency
and severity of claims incurred from those years relative to previous
expectations, which in turn caused an increase in the estimated ultimate claims
and claim adjustment expense reserves related to 1994 and prior years.
 
     At December 31, 1997 and 1996, liabilities of discontinued operations
relating to unpaid claim and claim adjustment expenses, off-set by certain
assets, have been reclassified in the balance sheet. Management estimates the
discontinued operations will be "run off" by the year 2000. The assets and
liabilities of discontinued operations are summarized below.
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              ------------------
                                                               1997       1996
                                                              -------    -------
<S>                                                           <C>        <C>
Assets:
  Reinsurance recoverables..................................  $ 5,937    $ 8,604
  Deferred tax asset........................................   12,904         --
  Investments and other assets..............................       --     17,261
                                                              -------    -------
          Total Assets......................................  $18,841    $25,865
                                                              =======    =======
Liabilities:
  Claims and claim adjustment expense reserves..............  $18,686    $25,466
  Other liabilities.........................................      155        399
                                                              -------    -------
          Total Liabilities.................................  $18,841    $25,865
                                                              =======    =======
</TABLE>
 
                                      F-16
<PAGE>   152
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
(6)  INCOME TAXES
 
     Total income tax expense (benefit) for the years ended December 31, 1997,
1996, and 1995 was allocated as follows:
 
<TABLE>
<CAPTION>
                                                          1997       1996      1995
                                                         -------    ------    -------
<S>                                                      <C>        <C>       <C>
Continuing operations..................................  $ 6,437    $1,597    $   (12)
Dividend accrued on preferred securities...............   (1,581)     (858)      (767)
Discontinued operations................................       --        --     (5,070)
Extraordinary items....................................   (6,643)       --         --
                                                         -------    ------    -------
          Total........................................  $(1,787)   $  739    $(5,849)
                                                         =======    ======    =======
</TABLE>
 
     Income tax expense (benefit) from continuing operations for the years ended
December 31, 1997, 1996, and 1995 is composed of the following amounts:
 
<TABLE>
<CAPTION>
                                                              1997      1996     1995
                                                             ------    ------    ----
<S>                                                          <C>       <C>       <C>
Current....................................................  $    4    $    4    $  4
Deferred...................................................   6,433     1,593     (16)
                                                             ------    ------    ----
          Total............................................  $6,437    $1,597    $(12)
                                                             ======    ======    ====
</TABLE>
 
     Taxes computed at the statutory rate of 34% varied from the amounts
reported in the consolidated statements of income at December 31, as follows:
 
<TABLE>
<CAPTION>
                                                           1997      1996      1995
                                                          ------    ------    -------
<S>                                                       <C>       <C>       <C>
Income taxes at statutory rates.........................  $5,869    $1,777    $ 3,974
Effect of tax-exempt interest...........................     (10)      (22)       (15)
Effect of meals and entertainment.......................      42        38         38
Effect of goodwill amortization.........................     353        --         --
Research and development credit.........................     179      (200)        --
Change in valuation allowance for tax assets............      --        --     (4,013)
Other...................................................       4         4          4
                                                          ------    ------    -------
          Total.........................................  $6,437    $1,597    $   (12)
                                                          ======    ======    =======
</TABLE>
 
                                      F-17
<PAGE>   153
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The tax effects of temporary differences that give rise to significant
portions of the deferred tax assets and liabilities at December 31, are
presented below:
 
<TABLE>
<CAPTION>
                                                                1997        1996
                                                              --------    --------
<S>                                                           <C>         <C>
Deferred tax assets:
  Original issue discount...................................  $     --    $  5,764
  Net operating loss carryforward...........................    43,918      29,062
  Alternate minimum tax credit carryforward.................     1,035         701
  Loss reserve discounting..................................     7,787          --
  Unearned premium liability................................       878         660
  Policyholder dividends....................................       466          --
  Deferred gain on capital lease............................       546          --
  Unrealized loss on available-for-sale securities..........        --          84
  Research and development credit...........................        21         200
  Other.....................................................       403         281
                                                              --------    --------
  Total gross deferred tax assets...........................    55,054      36,752
  Less: Valuation allowance.................................    (8,129)         --
                                                              --------    --------
          Total.............................................    46,925      36,752
                                                              --------    --------
Deferred tax liabilities:
  Loss reserves.............................................        --      (9,139)
  Discontinued operations...................................    (3,039)     (1,245)
  Reinsurance experience refunds............................   (15,300)    (15,300)
  Deferred acquisition costs................................    (1,999)     (1,034)
  Direct collection allowance...............................      (799)       (510)
  Unrealized gain on available-for-sale investments.........      (684)         --
  Reinsurance payable.......................................        --          (4)
                                                              --------    --------
  Total gross deferred tax liabilities......................   (21,821)    (27,232)
                                                              --------    --------
     Net deferred tax asset.................................    25,104       9,520
  Net deferred tax asset allocated to discontinued
     operations.............................................   (12,904)         --
                                                              --------    --------
     Net deferred tax asset -- continuing operations........  $ 12,200    $  9,520
                                                              ========    ========
</TABLE>
 
     Management believes it is more likely than not that the existing net
deductible temporary differences will reverse during the periods in which the
Company generates net taxable income. However, there can be no assurance the
Company will generate any earnings or any specific level of continuing earnings
in future years. Certain tax planning strategies could be implemented to
supplement income from operations to fully realize recorded tax benefits.
 
     At December 31, 1997, the Company had a tax net operating loss carryforward
of $130.2 million that begins to expire in the year 2006.
 
(7)  REINSURANCE
 
     Superior Pacific cedes claims and claim adjustment expenses to reinsurers
under various contracts that cover individual risks, classes of business, or
claims that occur during specified periods of time. Reinsurance is ceded on
pro-rata, per-risk, excess-of-loss, and aggregate bases. These reinsurance
arrangements provide greater diversification of risk and limit SNIC's claims
arising from large risks or from hazards of an unusual nature. Superior Pacific
is contingently liable to the extent that any reinsurer becomes unable to meet
its
 
                                      F-18
<PAGE>   154
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
contractual obligations. Therefore, the Company evaluates the financial
condition of its reinsurers and monitors concentrations of credit risks arising
from reinsurance activities and economic characteristics to minimize its
exposure to significant losses from reinsurer insolvencies.
 
     As of December 31, 1997, SNIC was involved in a dispute with certain of its
reinsurers, which, if not settled, may be resolved in arbitration. SNIC's
dispute exists with its property and casualty reinsurers as to the existence of
coverage related to a claim in the amount of $456. Management expects to recover
the entire disputed amount from the reinsurers. At December 31, 1997, there were
no disputes related to the workers' compensation operations.
 
     Effective June 30, 1991, SNIC entered into an aggregate excess of loss
reinsurance contract ("1991 Contract") with Centre Reinsurance Limited ("Centre
Re"). Under the 1991 Contract, SNIC purchased for $50 million reinsurance for
claims and claim adjustment expenses incurred on or prior to June 30, 1991 to
the extent that these amounts were unpaid at June 30, 1991. The coverage
obtained amounted to $87.5 million in excess of SNIC's retention. Additionally,
SNIC ceded approximately $69.1 million of earned premiums to Centre Re through
December 31, 1992. Claims and claim adjustment expenses occurring prior to
December 31, 1992 were ceded to Centre Re in the amount of $165.6 million under
the 1991 Contract. Prospective cessions of premium and claims were terminated by
mutual consent of SNIC and Centre Re effective December 31, 1992; however, all
other terms of the 1991 Contract remained in effect until the treaty was
commuted in June 1997.
 
     In 1996, as a result of the transaction entered into between the Company,
Centre Re, and Chase Manhattan Bank (see Note 8), the reinsurance receivables
related to the 1991 Contract no longer qualify as reinsurance receivables under
the conditions established in SFAS 113. Therefore, in 1996 the receivables were
reclassified as receivables from reinsurer on the balance sheet.
 
     Effective January 1, 1993, SNIC entered into an aggregate excess of loss
reinsurance contract ("1993 Contract") with Centre Re. From SNIC's perspective,
the 1993 Contract substantively operated as a one-year contract with at least
four one-year options to renew that were exercisable solely at the Company's
election during the first five years of the contract. Subsequent to January 1,
1998, the 1993 Contract could have been terminated by either SNIC or Centre Re
upon 30 days notice. The 1993 Contract required the Company to cede not less
than $15 million and not more than $20 million of premium to Centre Re with
respect to any covered accident year. Claims and allocated claim adjustment
expenses occurring during the accident year are ceded to Centre Re in excess of
a variable percentage of earned premium (60%, 56.5%, and 57.5% for the 1995,
1994, and 1993 accident years, respectively) and are subject to a limit of 130%
of ceded earned premium, such limit not to exceed $26 million for any accident
year. Effective January 1, 1996, the 1993 Contract was canceled at the Company's
election. In 1997, the Company paid $5.3 million related to the cancellation of
the 1993 Contract.
 
     Effective January 1, 1994, SNIC entered into a quota-share reinsurance
contract ("Quota-Share Contract") with Zurich Reinsurance (North America), Inc.,
("ZRNA") an affiliate of Zurich. Under the Quota-Share Contract, ZRNA may
provide Superior Pacific with an Assumption of Liability Endorsement facility
("ALE"), or, effective January 1, 1997, Superior Pacific may write directly on
policy forms of ZC Insurance Company ("ZCIC"), an affiliate of Zurich (the "ZCIC
Front"). The ceding rate under the Quota-Share Contract was 20% for 1994, and
ZRNA and Superior Pacific mutually agreed to reduce the quota-share
participation to 5% for 1995 and 1996. Further, Superior Pacific receives ceding
commissions ranging between 22.5% and 24.5% for premiums ceded to ZRNA. The
purpose of the ceding commission is to cover Superior Pacific's cost of
acquiring new business and may be changed as a result of changes in market
conditions on a quarterly basis.
 
     Effective January 1, 1997, the terms of the Quota-Share Contract were
amended. Under the amended terms of the Quota-Share Contract, ZRNA increased its
participation from 5% of premiums written in 1996
 
                                      F-19
<PAGE>   155
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
to 6.5% in 1997. In exchange for the increased participation, ZRNA will no
longer receive a separate fee for policies written on ALEs, but will receive 2%
of premiums written on ZCIC Front policies only.
 
     Superior Pacific entered into a reinsurance contract with Centre Re
effective June 30, 1997, under which Centre Re assumed $10 million of reserves
associated with claims open for future medical payments from Superior Pacific in
consideration of $1 million in cash and the assignment of the rights of Superior
Pacific's contribution and subrogation recoveries during the term of the
contract. The contract is accounted for as a deposit, and no gain will be
recognized until net cash payments from Centre Re are greater than Superior
Pacific's $1 million premium.
 
     Superior Pacific's contracts are generally entered into on an annual basis.
Superior Pacific has maintained reinsurance treaties with many reinsurers for a
number of years. In general, Superior Pacific's reinsurance contracts are of the
treaty variety, and cover underwritten risks specified in the treaties. Superior
Pacific also from time to time purchases facultative reinsurance covering
specific liabilities or policies underwritten. As of December 31, 1997, ZRC,
General Reinsurance Corporation, and Allstate Insurance account for 24.5%,
21.6%, and 10.4%, respectively, of total amounts recoverable from all reinsurers
on paid and unpaid claims and claim adjustment expenses.
 
     Amounts included in the income and expense accounts in continuing
operations in connection with all ceded reinsurance at December 31, are as
follows:
 
<TABLE>
<CAPTION>
                                                        1997        1996       1995
                                                      --------    --------    -------
<S>                                                   <C>         <C>         <C>
Net Premiums written:
  Premiums written..................................  $159,352    $ 99,282    $97,084
  Premiums ceded....................................   (22,423)    (11,567)    (7,945)
                                                      --------    --------    -------
     Net premiums written...........................  $136,929    $ 87,715    $89,139
                                                      ========    ========    =======
Net change in unearned premiums:
  Direct............................................  $ (3,649)   $   (645)   $  (381)
  Ceded.............................................      (342)       (288)      (215)
                                                      --------    --------    -------
     Net change in unearned premiums................  $ (3,991)   $   (933)   $  (596)
                                                      ========    ========    =======
Net claims and claim adjustment expenses:
  Claims and claim adjustment expenses..............  $122,830    $ 61,702    $56,388
  Reinsurance recoveries............................   (32,383)     (6,064)    (2,418)
                                                      --------    --------    -------
     Net claims and claim adjustment expenses.......  $ 90,447    $ 55,638    $53,970
                                                      ========    ========    =======
</TABLE>
 
(8)  LONG-TERM DEBT
 
     The following is a summary of the Company's long-term debt balances at
December 31:
 
<TABLE>
<CAPTION>
                                                              1997     1996
                                                              ----    -------
<S>                                                           <C>     <C>
Chase Financing Agreement -- 6.87% due through 2004.........  $--     $91,681
Imperial Bank debt -- 8.25% due through 2001................   --       7,250
Voting Notes due 2002.......................................   30          30
                                                              ---     -------
Balance at end of period....................................  $30     $98,961
                                                              ===     =======
</TABLE>
 
     Effective June 30, 1994, the Company entered into a $10 million term loan
agreement ("1994 Loan") with Imperial Bank, which was used to retire
subordinated notes issued during 1992. This term loan was to be fully amortized
over seven years with quarterly payments of $300 plus interest per quarter for
years one and two, $350 plus interest per quarter for years three and four, and
$400 plus interest per quarter for years five, six
 
                                      F-20
<PAGE>   156
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
and seven. Effective July 1, 1995, the borrowing rate was changed from Imperial
Bank's prime rate plus one-half percent to a fixed rate of 8% per annum.
Additionally, under the amended terms of the 1994 Loan, the Company could not
prepay it until July 1, 1996.
 
     The Company adhered to certain requirements and provisions in compliance
with the terms of the 1994 Loan. The provisions required SNIC to maintain
certain financial ratios and SNIG to maintain Imperial Bank certificates of
deposit in an amount equal to 20% of the Company's outstanding balance under the
1994 Loan. At December 31, 1996, the Imperial Bank certificates of deposit were
$1.5 million, all of which was restricted. On April 11, 1997, the Company
retired its outstanding 1994 Loan with Imperial Bank. As a result of the early
extinguishment, the Company recognized an extraordinary loss of $0.2 million,
net of a tax benefit of $0.1 million.
 
     During 1996, the Company entered into a financing transaction involving
Centre Re and Chase. Chase extended a $93.1 million term loan (net of
transaction costs). The Company used the proceeds from the financing to purchase
from SNIC reinsurance receivables due from Centre Re. The principal balance of
the loan was collateralized by receivables due from the reinsurer and amortized
based upon the payout pattern of the underlying claims of the reinsurance
receivables. In June 1997, the $93.1 million term loan was retired, offsetting
the entire amount due against the reinsurance receivable balance. The retirement
of this collateralized financing resulted in the Company's recognizing a $10.3
million extraordinary loss, net of income taxes.
 
     Voting notes ("Voting Notes") in the amount of $30 related to SNIG's 14.5%
Senior Subordinated Series A and Series B Notes ("14.5% Senior Subordinated
Notes") were still outstanding as of December 31, 1997. The 14.5% Senior
Subordinated Notes were retired in 1994. The Voting Notes of $30 will mature in
the year 2002. Warrants related to the 14.5% Senior Subordinated Notes remain
outstanding and provide their holders the right to purchase 1,566,465 shares of
SNIG common stock at a strike price of $4 per share. These warrants, which are
currently exercisable and expire on April 1, 2002, are held by senior management
and a nominee for III.
 
     The Company has an agreement with a national brokerage house to allow it to
enter into $20 million of reverse repurchase transactions that must be secured
by either U.S. treasuries, government agency bonds, or corporate debt. There
were no outstanding transactions at December 31, 1997.
 
(9)  PREFERRED SECURITIES ISSUED BY AFFILIATES
 
     On June 30, 1994, SNIG completed the sale of $20 million of preferred
securities and warrants to affiliates of Centre Re in a transaction approved by
the shareholders and the California Department of Insurance ("DOI"). The
preferred securities were subordinate to the 1994 Loan. A special purpose
investment partnership, Superior National Capital, L.P. (the "Limited
Partnership"), was formed in Bermuda to issue $20 million face amount of 9.7%
redeemable preferred securities ("1994 Preferred Securities") to Centre
Reinsurance Services (Bermuda) III, Limited in exchange for $18 million.
CentreLine Reinsurance Limited paid the Company $2 million for warrants to
purchase 579,357 shares of SNIG's common shares at $5.20 per share, representing
a fully-diluted 10 percent interest in SNIG. The warrants may be exercised at
any time and expire in 2002.
 
     In December 1997, SNIG formed a trust, whose sole purpose was to issue
10 3/4% Trust Preferred Securities (the "Trust Preferred Securities"), having an
aggregate liquidation amount of $105 million, and to invest the proceeds thereof
in an equivalent amount of 10 3/4% Senior Subordinated Notes due 2017 of the
Company (the "Senior Subordinated Notes"). The Company owns directly all of the
common securities issued by the Trust, which it purchased for an aggregate
consideration of $3.25 million. The proceeds from the sale of the Trust
Preferred Securities were used solely to purchase SNIG's Senior Subordinated
Notes. In addition, the Company entered into several contractual undertakings,
that when taken together, guarantee to the holders of the Trust Preferred
securities an unconditional right to enforce the payment of the distributions
 
                                      F-21
<PAGE>   157
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
with respect to such securities. Holders of the Trust Preferred Securities are
entitled to receive cumulative cash distributions at an annual rate of 10 3/4%
of the stated liquidation amount of $1,000 per Trust Preferred Security,
accruing from the date of original issuance of the Trust Preferred Securities
and payable semi-annually, in arrears, commencing on June 1, 1998. The Company
has the right to defer payments at any time or from time to time for a period
not exceeding 10 consecutive semi-annual periods, provided that no extension
period may extend beyond the stated maturity date. In the event there is a
change in control, holders of the Trust Preferred Securities may redeem their
securities at 101% of the principal.
 
     The Company used the net proceeds from the sale of the 10 3/4% Senior
Subordinated Notes in the amount of approximately $101.2 million, (i) to repay
outstanding debt, consisting of $40.8 million of bank debt and interest incurred
in connection with the acquisition of Pac Rim that would have matured in April
2003, bearing an average effective interest rate of 10.2%, (ii) to redeem from
an affiliate of Zurich $27.7 million Preferred of principal and interest, with
an effective rate of 11.7%, of the 1994 Securities, and (iii) to make a $15
million capital contribution to SNIC. The remaining proceeds are invested in
short-term, income-generating, investment-grade securities.
 
     The difference between the face value and the carrying value of the Trust
Preferred Securities is amortized over their nineteen-year maturity using the
scientific method. The amortization, net of tax benefits and accrued dividends,
is charged to current year income after continuing operations, net of taxes.
 
     The following is a summary of the preferred securities balance as of
December 31:
 
<TABLE>
<CAPTION>
                                                                1997       1996
                                                              --------    -------
<S>                                                           <C>         <C>
Beginning balance...........................................  $ 23,571    $21,045
Dividends and accretion.....................................     3,709      2,526
Retirement of 1994 Preferred Securities.....................   (27,275)        --
Issuance of Trust Preferred Securities......................   101,272         --
                                                              --------    -------
Balance at end of period....................................  $101,277    $23,571
                                                              ========    =======
</TABLE>
 
(10)  STATUTORY SURPLUS AND DIVIDEND RESTRICTIONS
 
     SNIC and SPCC are domiciled in the State of California and prepare their
statutory financial statements in accordance with accounting practices
prescribed or permitted by the DOI. Prescribed statutory accounting practices
include a variety of publications of the National Association of Insurance
Commissioners ("NAIC"), as well as state laws, regulations, and general
administrative rules. Permitted statutory accounting practices encompass all
accounting practices not so prescribed.
 
     SNIC's statutory policyholders' surplus as reported to regulatory
authorities was $71,663 and $51,998 at December 31, 1997, and 1996,
respectively. SNIC's statutory net income, as reported to regulatory
authorities, was $2,888, $791 and $1,050 for the years ended December 31, 1997,
1996, and 1995 respectively.
 
     SPCC's statutory policyholders' surplus as reported to regulatory
authorities was $30,542 and $20,930 at December 31, 1997 and 1996, respectively.
SPCC's statutory net income, as reported to regulatory authorities, was
$(6,074), $(13,069), and $4,879 for the years ended December 31, 1997, 1996, and
1995 respectively.
 
     Insurance companies are subject to insurance laws and regulations
established by the states in which they transact business. The laws of various
states establish supervisory agencies with broad administrative and supervisory
powers. Most states have also enacted legislation regulating insurance holding
company systems, including acquisitions, extraordinary dividends, the terms of
affiliate transactions, and other related matters. The Company and Superior
Pacific have registered as holding company systems pursuant to such legislation
in California. The NAIC has formed committees and appointed advisory groups to
study and formulate regulatory proposals on such diverse issues as the use of
surplus debentures and accounting for reinsurance
 
                                      F-22
<PAGE>   158
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
transactions. It is not possible to predict the future impact of changing state
and federal regulation on the operations of the Company and Superior Pacific.
 
     The Risk Based Capital Model ("RBC") for property and casualty insurance
companies was adopted by the NAIC in December 1993, and starting in 1995,
companies were required to report their RBC ratios to the NAIC. SNIC and SPCC
have calculated and met their RBC requirements.
 
     Insurance companies are also subject to restrictions affecting the amount
of stockholder dividends and advances that may be paid within any one year
without the prior approval of the DOI. The California Insurance Code provides
that the maximum amount that may be paid as dividends on an annual noncumulative
basis without prior notice to, or approval by, the DOI is the greater of (1) net
income for the preceding year or (2) 10% of statutory surplus as regards
policyholders as of the preceding December 31. At December 31, 1997, SNIC and
SPCC could pay approximately $7.2 million and $3.1 million, respectively, in
dividends and advances to the Company without the DOI's prior approval based on
10% of reported statutory surplus.
 
     In 1995, after receiving prior approval from the DOI, SNIC made an
extraordinary dividend distribution to SNIG of 100% of its shares in Superior
(Bermuda) Limited, which represented $15 million of SNIC's statutory capital and
surplus.
 
(11)  EMPLOYEE BENEFIT PLANS
 
     SNIG has elected to follow Accounting Principles Board Opinion No. 25,
"Accounting for Stock Issued to Employees" ("APB 25") and related
Interpretations in accounting for its employee stock options. As discussed below
in management's opinion, the alternative fair value accounting provided for
under SFAS 123, requires use of option valuation models that were not developed
for use in valuing employee stock options. Under APB 25, because the exercise
price of the Company's employee stock options equals the market price of the
underlying stock on the date of the grant, no compensation expense is
recognized.
 
     SNIG has two equity option plans, the 1986 Stock Option Plan ("1986 Plan")
and the 1995 Stock Incentive Plan ("1995 Plan"). The terms of the 1986 Plan
permit SNIG, at the Board of Directors' discretion, to grant options to its
management to purchase up to 225,000 shares of common stock. Options granted
under the 1986 Plan are not intended to qualify as incentive stock options
within the meaning of Section 422 of the Internal Revenue Code ("Code"). The
1995 Plan permits the granting of both options that qualify for treatment as
incentive stock options under Section 422 of the Code and options that do not
qualify as incentive stock options. Under the 1995 Plan, officers and key
employees of the Company may be granted options to purchase shares of SNIG
common stock or may be given the opportunity to receive restricted stock of
SNIG. Under the 1995 Plan, the aggregate number of shares of common stock that
may be granted, either through the exercise of options or the issuance of
restricted stock, is 625,000 shares. Under both plans, the exercise price of
each option equals the market price of SNIG's stock on the date of grant and
options have a maximum term of ten years. The Board of Directors may grant
options at any point during a year and the options generally vest over five
years.
 
     Pro forma information regarding net income and earnings per share is
required by SFAS 123, and has been determined as if the Company had accounted
for its employee stock options under the fair value method of that Statement.
The fair value for these options was estimated at the date of grant using a
Black-Scholes option pricing model with the following weighted-average
assumptions. The risk free interest rate used in the calculation is the 10 year
Treasury Note rate on the date the options were granted. The risk free interest
rate range used for options granted during 1997, 1996, and 1995 was 5.8% to
6.9%, 6% to 6.79%, and 6% to 7.11%, respectively. The volatility factors for the
expected market price of the common stock of 65%, 70%, and 77% were used for
options granted in 1997, 1996, and 1995 respectively. A weighted average
expected life of ten years was used as the Company has little history of
options' being exercised prior to their expiration.
 
                                      F-23
<PAGE>   159
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The Black-Scholes option valuation model was developed for use in
estimating the fair value of traded options that do not have vesting
restrictions and are fully transferable. In addition, option valuation models
require the input of highly subjective assumptions including the expected stock
price volatility. Because the Company's stock options have characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially affect the value of an estimate, in
management's opinion the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.
 
     For purposes of pro forma disclosures, the estimated fair value of the
options is amortized into expense over the options' vesting period. The
Company's pro forma information follows (in thousands except for earnings per
share information):
 
<TABLE>
<CAPTION>
                                                               1997       1996
                                                              -------    ------
<S>                                                           <C>        <C>
Pro forma net income........................................  $(5,366)   $1,857
Pro forma earnings per share
  Basic.....................................................    (1.02)     0.54
  Diluted...................................................  $ (0.77)   $ 0.38
</TABLE>
 
     A summary of the Company's stock option activity, and related information
for the years ended December 31, follows:
 
<TABLE>
<CAPTION>
                                         1997                         1996                         1995
                              --------------------------   --------------------------   --------------------------
                                            WEIGHTED-                    WEIGHTED-                    WEIGHTED-
                               NUMBER        AVERAGE        NUMBER        AVERAGE        NUMBER        AVERAGE
                              OF SHARES   EXERCISE PRICE   OF SHARES   EXERCISE PRICE   OF SHARES   EXERCISE PRICE
                              ---------   --------------   ---------   --------------   ---------   --------------
<S>                           <C>         <C>              <C>         <C>              <C>         <C>
Stock options outstanding
  beginning of year.........   389,516        $ 5.13        252,500        $4.90         138,750        $4.47
Stock options granted.......   132,257         12.43        146,516         5.46         135,000         5.20
Stock options exercised.....   (22,127)         4.74         (3,100)        4.00            (500)        4.00
Stock options canceled......   (38,567)         5.94         (6,400)        4.61         (20,750)        4.00
                              --------                     --------                     --------
Stock options outstanding,
  end of year...............   461,079        $ 7.17        389,516        $5.13         252,500        $4.90
                              ========        ======       ========        =====        ========        =====
Exercisable at end of
  year......................   152,525            --        102,200           --          56,690           --
Weighted-average fair value
  of options granted during
  the year..................  $   9.76                     $   4.41                     $   4.40
</TABLE>
 
                                      F-24
<PAGE>   160
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     Exercise prices for options outstanding as of December 31, 1997 ranged from
$4 to $14.875. The weighted-average remaining contractual life of those options
is 8.3 years. Since the range of exercise prices is wide, the following is a
summary of information for each exercise price range:
 
<TABLE>
<CAPTION>
                                                                                        WEIGHTED-AVERAGE
                   NUMBER                         WEIGHTED-AVERAGE      NUMBER OF        EXERCISE PRICE
                 OF OPTIONS                          REMAINING       OPTIONS (SHARES)     OF CURRENTLY
EXERCISE PRICE    (SHARES)     WEIGHTED-AVERAGE   CONTRACTUAL LIFE      CURRENTLY         EXERCISABLE
     RANGE       OUTSTANDING    EXERCISE PRICE        (YEARS)          EXERCISABLE          OPTIONS
- ---------------  -----------   ----------------   ----------------   ----------------   ----------------
<S>              <C>           <C>                <C>                <C>                <C>
$ 4.00-$ 4.99      111,566          $ 4.54              7.56              48,261             $ 4.25
$ 5.00-$ 5.99      176,450            5.18              7.68              95,130               5.18
$ 6.00-$ 6.99       40,112            6.25              9.00               7,864               6.25
$ 7.00-$11.99       28,850           10.89              9.85                 770               7.70
$12.00-$12.99       81,851           12.16             10.00                 500              12.75
$13.00-$14.99       22,250           14.64             10.00                  --                 --
                   -------                                               -------
                   461,079          $ 7.17              8.30             152,525             $ 4.98
                   =======          ======             =====             =======             ======
</TABLE>
 
     The following is a summary of the transactions under the 1986 Plan for the
years ended December 31:
 
<TABLE>
<CAPTION>
                                  1997                      1996                      1995
                         -----------------------   -----------------------   -----------------------
                          NUMBER       OPTION       NUMBER       OPTION       NUMBER       OPTION
                         OF SHARES      PRICE      OF SHARES      PRICE      OF SHARES      PRICE
                         ---------   -----------   ---------   -----------   ---------   -----------
<S>                      <C>         <C>           <C>         <C>           <C>         <C>
Stock options
  outstanding beginning
  of year..............   120,000    $4.00-$5.20    127,500    $4.00-$5.20     138,750   $4.00-$5.20
Stock options
  granted..............        --             --         --             --      10,000          5.20
Stock options
  exercised............    (9,125)          4.00     (3,100)          4.00        (500)         4.00
Stock options
  canceled.............    (2,125)          4.00     (4,400)     4.00-5.20     (20,750)         4.00
                          -------                   -------                  ---------
Stock options
  outstanding, end of
  year.................   108,750    $4.00-$5.20    120,000    $4.00-$5.20     127,500   $4.00-$5.20
                          =======    ===========    =======    ===========   =========   ===========
</TABLE>
 
     At December 31, 1997, 72,475 vested options were exercisable under the 1986
Plan. No additional options or purchase rights will be granted under the 1986
Plan.
 
     The following is a summary of the transactions under the 1995 Plan for the
years ended December 31:
 
<TABLE>
<CAPTION>
                                 1997                       1996                    1995
                       -------------------------   -----------------------   ------------------
                        NUMBER        OPTION        NUMBER       OPTION       NUMBER     OPTION
                       OF SHARES       PRICE       OF SHARES      PRICE      OF SHARES   PRICE
                       ---------   -------------   ---------   -----------   ---------   ------
<S>                    <C>         <C>             <C>         <C>           <C>         <C>
Stock Options:
  Stock options
     outstanding
     beginning of
     year............   269,516      $5.20-$7.70    125,000          $5.20         --       --
  Stock options
     granted.........   132,257    11.375-14.875    146,516      5.20-7.70    125,000    $5.20
  Stock options
     exercised.......   (13,002)       4.87-7.70         --             --         --       --
  Stock options
     canceled........   (36,442)     4.87-12.125     (2,000)          5.20         --       --
                        -------                     -------                   -------
  Stock options
     outstanding end
     of year.........   352,329    $4.87-$14.875    269,516    $5.20-$7.70    125,000    $5.20
                        =======    =============    =======    ===========    =======    =====
</TABLE>
 
                                      F-25
<PAGE>   161
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                 1997                       1996                    1995
                       -------------------------   -----------------------   ------------------
                        NUMBER        OPTION        NUMBER       OPTION       NUMBER     OPTION
                       OF SHARES       PRICE       OF SHARES      PRICE      OF SHARES   PRICE
                       ---------   -------------   ---------   -----------   ---------   ------
<S>                    <C>         <C>             <C>         <C>           <C>         <C>
Restricted Options:
  Shares outstanding
     beginning of
     year............    69,265      $4.87-$6.25     36,350          $5.20         --      $--
  Shares granted.....    36,450           12.125     45,934      4.87-6.25     36,350     5.20
  Shares issued......   (12,222)     4.87-12.125    (13,019)     4.87-5.20         --       --
  Shares canceled....    (9,813)     4.87-12.125         --             --         --       --
                        -------                     -------                   -------
  Shares outstanding
     end of year.....    83,680    $4.87-$12.125     69,265    $4.87-$6.25     36,350    $5.20
                        =======    =============    =======    ===========    =======    =====
</TABLE>
 
     At December 31, 1997, 80,050 vested options were exercisable under the 1995
Plan. Shares available for future grants under the 1995 Plan at December 31,
1997 were 188,991.
 
     Effective January 1, 1990, the Company implemented a 401(k) Plan ("Company
Plan") which is available for substantially all employees and under which the
Company matches a percentage of the participant's compensation. The employer
contributions are discretionary and vest over a five year period. The employer
contributions for plan years 1997, 1996, and 1995 were $186, $170, and $150,
respectively.
 
     The Company has no formal post-employment retirement benefit plans;
however, the Company has entered into severance contracts with certain former
employees for which approximately $366, $48, and $322 of accrued expenses were
recorded at December 31, 1997, 1996, and 1995, respectively.
 
     The Pac Rim Assurance Company 401(k) Plan ("Pac Rim Plan") permits
employees of Pac Rim who attain the age of 21 and complete 30 days of employment
to elect to make tax-deferred contributions of a specified percentage of their
compensations during each year through payroll deductions. As of December 31,
1997, there were 38 participants in the Pac Rim Plan employed by the Company.
Under the Pac Rim Plan, the Company, as successor to Pac Rim, has discretion to
make additional contributions. The Company made a $200 discretionary employer
contribution to the Pac Rim Plan in April 1997. The Company plans to merge the
Pac Rim Plan into the Company Plan by the end of December 31, 1998.
 
(12)  COMMITMENTS
 
     The Company occupies offices under various operating leases and leases
substantially all of its fixed assets through a capital lease. The future
minimum lease payments at December 31, 1997, are as follows:
 
<TABLE>
<CAPTION>
                               OPERATING       CAPITAL      INTEREST ON CAPITAL    TOTAL LEASE
                              COMMITMENTS    COMMITMENTS        COMMITMENTS        COMMITMENTS
                              -----------    -----------    -------------------    -----------
<S>                           <C>            <C>            <C>                    <C>
1998........................    $ 4,655        $1,659             $  685             $ 6,999
1999........................      4,681         2,005                552               7,238
2000........................      3,414         2,232                325               5,971
2001........................      3,083         1,797                 16               4,896
2002........................      1,279            --                 --               1,279
                                -------        ------             ------             -------
                                $17,112        $7,693             $1,578             $26,383
                                =======        ======             ======             =======
</TABLE>
 
     Rental expenses totaled approximately $4,020, $1,918, and $1,772 for the
years ended December 31, 1997, 1996, and 1995 respectively.
 
     Effective December 1, 1997, the Company entered into an $8,000 capital
lease with BancBoston for substantially all of the property and equipment of
both SNIC and SPCC acquired on or before March 31, 1997. The transaction
resulted in a deferred gain of $1,651 that will be amortized over 36 months.
 
                                      F-26
<PAGE>   162
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     In a transaction associated with the sale of the 14.5% Senior Subordinated
Notes to III, the Company and SNIC agreed to pay International Insurance
Advisors, Inc., agent for each of the III limited partners and for the general
partner of III, a consulting fee in the amount of $250 beginning on April 1,
1993, and on each April 1 thereafter, to and including April 1, 1998. The
retirement of the 14.5% Senior Subordinated Notes in 1994 did not affect the
obligation of the Company and SNIC to pay the consulting fee.
 
(13)  LITIGATION
 
     The Company is subject to various litigation which arises in the ordinary
course of business. Management is of the opinion that such litigation will not
have a material adverse effect on the consolidated financial position of the
Company or its consolidated results of operations.
 
(14)  PREPAID AND OTHER ASSETS
 
     A summary of prepaid and other assets at December 31, are as follows:
 
<TABLE>
<CAPTION>
                                                               1997       1996
                                                              -------    ------
<S>                                                           <C>        <C>
Furniture and fixtures, net.................................  $ 7,970    $1,260
Data processing equipment, net..............................       71     3,560
Prepaid and advances........................................    2,178     1,091
Funds due from lender.......................................    8,000        --
Other.......................................................    2,887     1,453
                                                              -------    ------
                                                              $21,106    $7,364
                                                              =======    ======
</TABLE>
 
(15)  ACCOUNTS PAYABLE AND OTHER LIABILITIES
 
     A summary of accounts payable and other liabilities at December 31, are as
follows:
 
<TABLE>
<CAPTION>
                                                               1997       1996
                                                              -------    -------
<S>                                                           <C>        <C>
Escheatment payable.........................................  $ 1,401    $   333
Rent and lease liability....................................      371        527
Accounts payable............................................   15,526      8,683
Liabilities associated with Pac Rim acquisition.............    7,608         --
Other liabilities...........................................    3,962      3,198
                                                              -------    -------
                                                              $28,868    $12,741
                                                              =======    =======
</TABLE>
 
                                      F-27
<PAGE>   163
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
(16)  EARNINGS PER SHARE RECONCILIATION
 
     The following is an illustration of the reconciliation of the numerators
and denominators of the basic and diluted earnings per share (EPS) computations:
<TABLE>
<CAPTION>
                                    FOR THE YEAR ENDED 1997                      FOR THE YEAR ENDED 1996
                           ------------------------------------------   ------------------------------------------
                               INCOME          SHARES       PER SHARE       INCOME          SHARES       PER SHARE
                            (NUMERATOR)     (DENOMINATOR)    AMOUNT      (NUMERATOR)     (DENOMINATOR)    AMOUNT
                            -----------     -------------   ---------   --------------   -------------   ---------
                           (IN THOUSANDS)                               (IN THOUSANDS
<S>                        <C>              <C>             <C>         <C>              <C>             <C>
BASIC EPS
 Income before items
   below.................     $ 10,824        5,249,736      $ 2.06        $ 3,630         3,432,679      $ 1.06
 Preferred Securities....       (3,069)                       (0.58)        (1,667)                        (0.49)
 Discontinued
   Operations............           --                           --             --                            --
 Extraordinary Items.....      (12,896)                       (2.46)            --                            --
                              --------                       ------        -------                        ------
 Net Income..............     $ (5,141)                      $(0.98)       $ 1,963                        $ 0.57
                              ========                       ======        =======                        ======
EFFECT OF DILUTIVE
 SECURITIES
 Options.................                       295,065                                      266,183
 Warrants................                     1,471,364                                    1,167,178
DILUTED EPS
 Income before items
   below.................     $ 10,824        7,016,165      $ 1.54        $ 3,630         4,826,040      $ 0.75
 Preferred Securities....       (3,069)                       (0.44)        (1,667)                        (0.34)
 Discontinued
   Operations............           --                           --             --                            --
 Extraordinary Items.....      (12,896)                       (1.84)            --                            --
                              --------                       ------        -------                        ------
Net Income...............     $ (5,141)                      $(0.74)       $ 1,963                        $ 0.41
                              ========                       ======        =======                        ======
 
<CAPTION>
                                    FOR THE YEAR ENDED 1995
                           ------------------------------------------
                               INCOME          SHARES       PER SHARE
                            (NUMERATOR)     (DENOMINATOR)    AMOUNT
                           --------------   -------------   ---------
                           (IN THOUSANDS)
<S>                        <C>              <C>             <C>
BASIC EPS
 Income before items
   below.................     $11,701         3,429,915      $ 3.41
 Preferred Securities....      (1,488)                        (0.43)
 Discontinued
   Operations............      (9,842)                        (2.87)
 Extraordinary Items.....          --                            --
                              -------                        ------
 Net Income..............     $   371                        $ 0.11
                              =======                        ======
EFFECT OF DILUTIVE
 SECURITIES
 Options.................                        47,052
 Warrants................                       464,627
DILUTED EPS
 Income before items
   below.................     $11,701         3,941,594      $ 2.97
 Preferred Securities....      (1,488)                        (0.38)
 Discontinued
   Operations............      (9,842)                        (2.50)
 Extraordinary Items.....          --                            --
                              -------                        ------
Net Income...............     $   371                        $ 0.09
                              =======                        ======
</TABLE>
 
     Options to purchase 1,250 shares at $14.81, 12,500 shares at $14.875, 7,250
shares at $14.25, and 1,250 shares at $14.31 were outstanding during the last
quarter of 1997 but were not included in the computation of diluted EPS because
the options' exercise price was greater than the average market price of the
common shares. The options, which expire in 2002, were still outstanding at the
end of year 1997.
 
                                      F-28
<PAGE>   164
 
                                                                    SCHEDULE I.1
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                 BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              ----------------------
                                                                1997         1996
                                                              ---------    ---------
                                                              (AMOUNTS IN THOUSANDS,
                                                                EXCEPT SHARE DATA)
<S>                                                           <C>          <C>
                                ASSETS
INVESTMENTS
Bonds and Notes:
  Available-for-sale, at market (cost: 1997, $7,539)........  $  7,533     $     --
  Cash and short-term instruments (certificates of deposit
     and other short-term instruments)......................     5,404        1,787
                                                              --------     --------
          TOTAL INVESTMENTS.................................    12,937        1,787
  Accrued investment income.................................        38            1
  Receivable from reinsurer.................................        --      110,527
  Investment in subsidiaries................................   168,856       72,788
  Intercompany receivable...................................        91           91
  Deferred income taxes.....................................     1,884        4,957
  Other.....................................................       174        1,087
                                                              --------     --------
          TOTAL ASSETS......................................  $183,980     $191,238
                                                              ========     ========
                 LIABILITIES AND STOCKHOLDERS' EQUITY
LIABILITIES
Long-term debt..............................................  $     30     $ 98,961
Intercompany liability......................................    21,462       23,465
Accounts payable and other liabilities......................     1,393           50
                                                              --------     --------
          TOTAL LIABILITIES.................................    22,885      122,476
                                                              --------     --------
1997 PREFERRED SECURITIES ISSUED BY AFFILIATE;
  authorized 105,000 shares in 1997.........................   101,277           --
1994 PREFERRED SECURITIES ISSUED BY AFFILIATE;
  authorized 1,100,000 shares: issued and outstanding
  1,013,753 shares in 1996..................................        --       23,571
 
                         STOCKHOLDERS' EQUITY
Common stock, $0.01 par value; authorized 25,000,000 shares:
  issued and outstanding 5,871,279 shares in 1997 and
  3,446,492 shares in 1996..................................        59           34
Paid-in capital excess of par...............................    34,242       15,988
Paid in capital -- warrants.................................     2,206        2,206
Unrealized gain on equity securities, net of taxes..........       112          (17)
Unrealized gain (loss) on available-for-sale investments,
  net of income taxes.......................................     1,215         (145)
Retained earnings...........................................    21,984       27,125
                                                              --------     --------
          TOTAL STOCKHOLDERS' EQUITY........................    59,818       45,191
                                                              --------     --------
          TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY........  $183,980     $191,238
                                                              ========     ========
</TABLE>
 
                  See notes to condensed financial information
                                      F-29
<PAGE>   165
 
                                                                    SCHEDULE I.2
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                            STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                   TWELVE MONTHS ENDED
                                                                       DECEMBER 31,
                                                              ------------------------------
                                                                1997       1996       1995
                                                              --------    -------    -------
                                                                  (AMOUNTS IN THOUSANDS)
<S>                                                           <C>         <C>        <C>
REVENUES:
  Net investment income.....................................  $   (112)   $    89    $   330
                                                              --------    -------    -------
          TOTAL REVENUES....................................      (112)        89        330
EXPENSES:
  Interest expense..........................................     5,965      1,465        804
  Other operating expenses..................................       518       (446)       304
                                                              --------    -------    -------
          TOTAL EXPENSES....................................     6,483      1,019      1,108
                                                              --------    -------    -------
LOSS BEFORE INCOME TAXES, PREFERRED SECURITIES DIVIDENDS AND
  ACCRETION, AND EXTRAORDINARY ITEMS........................    (6,595)      (930)      (778)
Income tax expense..........................................     8,246        858        767
                                                              --------    -------    -------
INCOME BEFORE PREFERRED SECURITIES DIVIDENDS AND ACCRETION,
  AND EXTRAORDINARY ITEMS...................................   (14,841)    (1,788)    (1,545)
Equity in net income of subsidiaries........................    25,709      5,418      3,404
1994 Preferred securities dividends and accretion, net of
  income tax benefit of $1,260 and $858 in 1997 and 1996,
  respectively..............................................    (2,445)    (1,667)    (1,488)
1997 Preferred securities dividends and accretion, net of
  income tax benefit of $321 in 1997........................      (624)        --         --
Extraordinary loss on retirement of long-term debt, net of
  income tax benefit of $5,338 in 1997......................   (10,361)        --         --
Extraordinary loss on retirement of long-term debt, net of
  income tax benefit of $785 in 1997........................    (1,524)        --         --
Extraordinary loss on redemption of Pac Rim's outstanding
  debentures, net of income tax benefit of $327 in 1997.....      (635)        --         --
Extraordinary loss on retirement of preferred securities,
  net of income tax benefit of $134 in 1997.................      (259)        --         --
Extraordinary loss on early retirement of Imperial Bank Loan
  net of income tax benefit of $83 in 1997..................      (161)        --         --
                                                              --------    -------    -------
          NET INCOME (LOSS).................................  $ (5,141)   $ 1,963    $   371
                                                              ========    =======    =======
</TABLE>
 
                  See notes to condensed financial information
                                      F-30
<PAGE>   166
 
                                                                    SCHEDULE I.3
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                   TWELVE MONTHS ENDED
                                                                       DECEMBER 31,
                                                              ------------------------------
                                                                1997       1996       1995
                                                              --------   ---------   -------
                                                                  (AMOUNTS IN THOUSANDS)
<S>                                                           <C>        <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net (loss) income.........................................  $ (5,141)  $   1,963   $   371
                                                              --------   ---------   -------
  Adjustments to reconcile net (loss) income to net cash
    used in operating activities:
    Amortization of bonds and preferred stock...............        --          --        (1)
    Loss on sale of investment..............................         7           5        --
    Income from subsidiaries................................   (25,709)     (5,418)   (3,404)
    Extraordinary loss......................................    12,940          --        --
    Interest expense on long-term debt......................     3,581          --        --
    Preferred securities dividends and accretion............     3,069       2,525     2,255
    Increase in current income taxes........................        --          --     1,721
    (Increase) decrease in accrued investment income........       (37)          8         1
    Decrease in deferred income taxes.......................     8,247          --        --
    (Increase) decrease in other assets.....................     2,209        (994)      (11)
    Increase in accounts payable and other liabilities......       446      19,334        78
                                                              --------   ---------   -------
      Total adjustments.....................................     4,753      15,460       639
                                                              --------   ---------   -------
      Net cash (used in) provided by operating activities...      (388)     17,423     1,010
                                                              --------   ---------   -------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Paid-in-capital -- restricted stock.......................       279          78         2
  Proceeds from issuance of common stock....................    18,000          --        --
  Proceeds from 1997 Trust Preferred Securities.............   101,272          --        --
  Long-term debt -- Chase Manhattan Bank....................    41,257          --        --
  Retirement of long-term debt -- Chase Manhattan Bank......   (44,000)         --        --
  Retirement of 1994 Preferred Securities...................   (27,668)         --        --
  Retirement of long-term debt -- Imperial Bank.............    (7,250)     (1,250)   (1,200)
  Prepayment penalty on long-term debt......................      (244)         --        --
  Proceeds from Chase financing.............................        --      93,091        --
  Retirement of long-term debt -- Chase Financing...........        --      (1,410)       --
                                                              --------   ---------   -------
      Net cash provided by (used in) financing activities...    81,646      90,509    (1,198)
                                                              --------   ---------   -------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of bonds and notes:
    Investments available-for-sale..........................    (7,539)         --    (1,496)
    Increase in receivable from reinsurer...................        --    (110,527)       --
  Purchase of Pacific Rim Holding Company...................   (44,016)         --        --
  Investment in subsidiary..................................    (1,175)         --        --
  Sales of bonds and notes: Investments available for
    sale....................................................        --       1,493        --
  Capital contribution to subsidiaries......................   (25,000)         --    (1,500)
  Net decrease in invested cash.............................        89          --        --
                                                              --------   ---------   -------
      Net cash used in investing activities.................   (77,641)   (109,034)   (2,996)
                                                              --------   ---------   -------
      Net increase (decrease) in cash.......................     3,617      (1,102)   (3,184)
  Cash and invested cash at beginning of period.............     1,787       2,889     6,073
                                                              --------   ---------   -------
  Cash and invested cash at end of period...................  $  5,404   $   1,787   $ 2,889
                                                              ========   =========   =======
  Supplemental disclosure of cash flow information:
    Cash paid during the year for income taxes..............  $      1   $       1   $     1
                                                              ========   =========   =======
    Cash paid during the year for interest..................  $  2,433   $     641   $   808
                                                              ========   =========   =======
</TABLE>
 
                  See notes to condensed financial information
                                      F-31
<PAGE>   167
 
                                                                    SCHEDULE I.4
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                    NOTES TO CONDENSED FINANCIAL INFORMATION
 
1.  BASIS OF PRESENTATION
 
     In accordance with the requirements of Regulation S-X of the Securities and
Exchange Commission, the financial statements of the registrant are condensed
and omit many disclosures presented in the consolidated financial statements and
the notes thereto.
 
2.  LONG TERM DEBT
 
     The following is a summary of the long-term debt balances at December 31:
 
<TABLE>
<CAPTION>
                                                              1997     1996
                                                              ----    -------
<S>                                                           <C>     <C>
Chase Financing Agreement -- 6.87% due through 2004.........  $--     $91,681
Imperial Bank Debt -- 8.25% due through 2001................   --       7,250
Voting Notes due 2002.......................................   30          30
                                                              ---     -------
Balance at end of period....................................  $30     $98,961
                                                              ===     =======
</TABLE>
 
     The voting notes of $30 will mature in the year 2002.
 
3.  DIVIDENDS FROM SUBSIDIARIES
 
     During 1997, 1996, and 1995, there were no dividends paid to SNIG by its
consolidated subsidiaries; however SNIC paid SNIG $2.9 million for its current
income taxes.
 
4.  CONTINGENCIES
 
     The Company is subject to various litigation which arises in the ordinary
course of business. Based upon discussions with counsel, management is of the
opinion that such litigation will not have a material adverse effect on the
consolidated financial position of the Company or its consolidated results of
operations.
 
5.  RECONCILIATION -- RECEIVABLE FROM REINSURER
 
     The following is a reconciliation between the Condensed Financial
Information of Registrant Balance Sheet and the Consolidated Balance Sheet for
Receivable from reinsurer.
 
<TABLE>
<CAPTION>
                                                                RECEIVABLE FROM
                                                                   REINSURER
                                                                ----------------
                                                                1997      1996
                                                                ----    --------
<S>                                                             <C>     <C>
Balance per Consolidated Balance Sheet......................    $--     $ 93,266
Add: Elimination for Discontinued Operations................     --       17,261
                                                                ---     --------
Balance per Condensed Balance Sheet.........................    $--     $110,527
                                                                ===     ========
</TABLE>
 
                                      F-32
<PAGE>   168
 
                                                                     SCHEDULE II
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                 VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
 
<TABLE>
<CAPTION>
               COLUMN A                   COLUMN B            COLUMN C             COLUMN D    COLUMN E
               --------                  ----------   -------------------------   ----------   ---------
                                                              ADDITIONS
                                                      -------------------------
                                         BALANCE AT    CHARGED TO    CHARGED TO                 BALANCE
                                         BEGINNING       COSTS         OTHER                    AT END
                                         OF PERIOD    AND EXPENSES    ACCOUNTS    DEDUCTIONS   OF PERIOD
                                         ----------   ------------   ----------   ----------   ---------
                                                             (AMOUNTS IN THOUSANDS)
<S>                                      <C>          <C>            <C>          <C>          <C>
Year ended December 31, 1997
  Allowance for possible losses on
     premiums receivable...............     $300         $2,311           --       $(1,811)      $800
                                            ====         ======        =====       =======       ====
  Allowance for possible losses on
     reinsurance recoverable...........       --             --           --            --         --
                                            ====         ======        =====       =======       ====
Year ended December 31, 1996
  Allowance for possible losses on
     premiums receivable...............     $500         $1,369           --       $(1,569)      $300
                                            ====         ======        =====       =======       ====
  Allowance for possible losses on
     reinsurance recoverable...........       --             --           --            --         --
                                            ====         ======        =====       =======       ====
Year ended December 31, 1995
  Allowance for possible losses on
     premiums receivable...............     $900         $1,531           --       $(1,931)      $500
                                            ====         ======        =====       =======       ====
  Allowance for possible losses on
     reinsurance recoverable...........       --             --           --            --         --
                                            ====         ======        =====       =======       ====
</TABLE>
 
                                      F-33
<PAGE>   169
 
                                                                    SCHEDULE V.1
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                       SUPPLEMENTAL INSURANCE INFORMATION
<TABLE>
<CAPTION>
            COLUMN A                COLUMN B        COLUMN C      COLUMN D     COLUMN E     COLUMN F    COLUMN G     COLUMN H
            --------               -----------   --------------   --------   ------------   --------   ----------   ----------
                                                 FUTURE POLICY                                                      BENEFITS,
                                    DEFERRED       BENEFITS,                 OTHER POLICY                            CLAIMS,
                                     POLICY      LOSSES, CLAIMS               CLAIMS AND                  NET       LOSSES AND
                                   ACQUISITION      AND LOSS      UNEARNED     BENEFITS     PREMIUM    INVESTMENT   SETTLEMENT
                                      COSTS         EXPENSES      PREMIUM      PAYABLE      REVENUE      INCOME      EXPENSES
                                   -----------   --------------   --------   ------------   --------   ----------   ----------
                                                                     (AMOUNTS IN THOUSANDS)
<S>                                <C>           <C>              <C>        <C>            <C>        <C>          <C>
1997
  Workers' Compensation..........    $5,879         $201,255      $12,913       $   --      $140,920    $12,674      $90,447
                                     ======         ========      =======       ======      ========    =======      =======
1996
  Workers Compensation...........    $3,042         $115,529      $ 9,702       $   --      $ 88,648    $ 7,769      $55,638
                                     ======         ========      =======       ======      ========    =======      =======
1995
  Workers' Compensation..........    $2,780         $141,495      $10,347       $   --      $ 89,735    $ 9,784      $53,970
                                     ======         ========      =======       ======      ========    =======      =======
 
<CAPTION>
                                     COLUMN I     COLUMN J    COLUMN K
                                   ------------   ---------   --------
                                   AMORTIZATION
                                   OF DEFERRED
                                      POLICY        OTHER
                                   ACQUISITION    OPERATING   PREMIUMS
                                      COSTS       EXPENSES    WRITTEN
                                   ------------   ---------   --------
                                         (AMOUNTS IN THOUSANDS)
<S>                                <C>            <C>         <C>
1997
  Workers' Compensation..........    $19,977       $25,909    $136,929
                                     =======       =======    ========
1996
  Workers Compensation...........    $16,870       $24,609    $ 87,715
                                     =======       =======    ========
1995
  Workers' Compensation..........    $18,288       $21,314    $ 89,139
                                     =======       =======    ========
</TABLE>
 
                                      F-34
<PAGE>   170
 
                                                                    SCHEDULE V.2
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
                                  REINSURANCE
 
<TABLE>
<CAPTION>
              COLUMN A                COLUMN B   COLUMN C      COLUMN D     COLUMN E     COLUMN F
              --------                --------   ---------   ------------   --------   -------------
                                                                                       PERCENTAGE OF
                                                 CEDED TO    ASSUMED FROM                 AMOUNT
                                       GROSS       OTHER        OTHER         NET         ASSUMED
                                       AMOUNT    COMPANIES    COMPANIES      AMOUNT       TO NET
                                      --------   ---------   ------------   --------   -------------
                                                          (AMOUNTS IN THOUSANDS)
<S>                                   <C>        <C>         <C>            <C>        <C>
Year ended December 31, 1997
  Premiums:
  Workers' compensation insurance...  $152,253    $22,081      $10,748      $140,920        7.6%
                                      --------    -------      -------      --------        ---
     Total premiums.................  $152,253    $22,081      $10,748      $140,920        7.6%
                                      ========    =======      =======      ========        ===
Year ended December 31, 1996
  Premiums:
  Workers' compensation insurance...  $ 97,270    $11,280      $ 2,658      $ 88,648        3.0%
                                      --------    -------      -------      --------        ---
     Total Premiums.................  $ 97,270    $11,280      $ 2,658      $ 88,648        3.0%
                                      ========    =======      =======      ========        ===
Year ended December 31, 1995
  Premiums:
  Workers' compensation insurance...  $ 96,630    $ 7,730      $   835      $ 89,735        0.9%
                                      --------    -------      -------      --------        ---
     Total premiums.................  $ 96,630    $ 7,730      $   835      $ 89,735        0.9%
                                      ========    =======      =======      ========        ===
</TABLE>
 
                                      F-35
<PAGE>   171
 
                                                                    SCHEDULE V.3
 
            SUPERIOR NATIONAL INSURANCE GROUP, INC. AND SUBSIDIARIES
 
            SUPPLEMENTAL PROPERTY AND CASUALTY INSURANCE INFORMATION
 
<TABLE>
<CAPTION>
         COLUMN A             COLUMN B      COLUMN C     COLUMN D     COLUMN E   COLUMN F    COLUMN G          COLUMN H
         --------            -----------   ----------   -----------   --------   --------   ----------   ---------------------
                                                         DISCOUNT
                                                          IF ANY,
                                                         DEDUCTED
                                            RESERVES    IN RESERVES                                        CLAIMS AND CLAIM
                                           FOR UNPAID   FOR UNPAID                                        ADJUSTMENT EXPENSES
                              DEFERRED     CLAIMS AND   CLAIMS AND                                       INCURRED RELATED TO:
                               POLICY        CLAIMS        CLAIM                               NET       ---------------------
                             ACQUISITION   ADJUSTMENT   ADJUSTMENT    UNEARNED    EARNED    INVESTMENT    CURRENT      PRIOR
                                COSTS       EXPENSES     EXPENSES     PREMIUM    PREMIUM      INCOME       YEAR        YEAR
                             -----------   ----------   -----------   --------   --------   ----------   ---------   ---------
                                                                  (AMOUNTS IN THOUSANDS)
<S>                          <C>           <C>          <C>           <C>        <C>        <C>          <C>         <C>
1997
  Workers' Compensation....    $5,879       $201,255      $   --      $12,913    $140,920    $12,674      $95,826     $(5,379)
                               ======       ========      ======      =======    ========    =======      =======     =======
1996
  Workers' Compensation....    $3,042       $115,529      $   --      $ 9,702    $ 88,648    $ 7,769      $57,614     $(1,976)
                               ======       ========      ======      =======    ========    =======      =======     =======
1995
  Workers' Compensation....    $2,780       $141,495      $   --      $10,347    $ 89,735    $ 9,784      $58,842     $(4,872)
                               ======       ========      ======      =======    ========    =======      =======     =======
</TABLE>
 
                                      F-36
<PAGE>   172
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                               MARCH 31,     DECEMBER 31,
                                                                 1998            1997
                                                              -----------    ------------
                                                              (UNAUDITED)        (*)
<S>                                                           <C>            <C>
INVESTMENTS:
Bonds and notes:
  Available-for-sale, at market (cost: 1998, $208,077; 1997,
    $203,373)...............................................   $210,065        $205,214
Equity securities, at market (cost: 1998, $1,837; 1997,
  $1,356)...................................................      1,980           1,526
Cash and short-term instruments (Restricted cash: 1998,
  $159; 1997, $651).........................................     16,490          35,376
                                                               --------        --------
         Total investments..................................    228,535         242,116
Reinsurance recoverable:
  Paid claims and claim adjustment expense..................      2,295           3,927
  Unpaid claims and claim adjustment expense................     53,303          49,155
Premiums receivable (less allowance for doubtful accounts:
  1998 and 1997, $800)......................................     21,655          24,364
Earned but unbilled premiums receivable.....................     12,791          12,524
Accrued investment income...................................      2,331           2,661
Deferred policy acquisition costs...........................      5,987           5,879
Deferred income taxes (less valuation allowance of $8,129,
  1998 and 1997)............................................     12,428          12,200
Funds held by reinsurer.....................................      4,186           5,152
Prepaid reinsurance premiums................................      5,381           1,598
Goodwill....................................................     35,583          35,887
Prepaid and other...........................................     17,033          21,106
                                                               --------        --------
         Total assets.......................................   $401,508        $416,569
                                                               ========        ========
 
                          LIABILITIES AND STOCKHOLDERS' EQUITY
LIABILITIES:
Claims and claim adjustment expenses........................   $180,333        $201,255
Unearned premiums...........................................     14,610          12,913
Reinsurance payable.........................................      7,383           3,412
Long-term debt..............................................         30              30
Policyholder dividends......................................      1,370           1,370
Capital lease...............................................      7,191           7,626
Accounts payable and other liabilities......................     27,492          28,868
                                                               --------        --------
         Total liabilities..................................    238,409         255,474
Company-obligated Trust Preferred Securities of Subsidiary
  Trust Holding solely Senior Subordinated Notes of SNIG;
  $1,000 face per share; issued and outstanding 105,000
  shares in 1997 and 1998...................................    101,291         101,277
 
                                  STOCKHOLDERS' EQUITY
 
Common stock, $0.01 par value; authorized 25,000,000 shares:
  issued and outstanding 5,874,379 shares in 1998; 5,871,279
  shares in 1997............................................         59              59
  Paid-in capital excess of par.............................     34,257          34,242
Paid in capital -- warrants.................................      2,206           2,206
Accumulated other comprehensive income:
  Unrealized gain on investments, net of taxes..............      1,407           1,327
  Retained earnings.........................................     23,879          21,984
                                                               --------        --------
         Total stockholders' equity.........................     61,808          59,818
                                                               --------        --------
         Total liabilities and stockholders' equity.........   $401,508        $416,569
                                                               ========        ========
</TABLE>
 
- ---------------
* Derived from audited financial statements.
 
           See Notes to Condensed Consolidated Financial Statements.
                                      F-37
<PAGE>   173
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
                  CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                   THREE MONTHS ENDED MARCH 31, 1998 AND 1997
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                  THREE MONTHS ENDED
                                                                      MARCH 31,
                                                              --------------------------
                                                                 1998           1997
                                                              -----------    -----------
                                                              (UNAUDITED)    (UNAUDITED)
<S>                                                           <C>            <C>
REVENUES:
Premiums written, net of reinsurance ceded of $12,552 and
  $2,777 in 1998 and 1997, respectively.....................    $28,501        $20,003
Net change in unearned premiums.............................      2,086         (1,025)
                                                                -------        -------
Net premiums earned.........................................     30,587         18,978
Net investment income.......................................      4,253          2,086
                                                                -------        -------
          Total Revenues....................................     34,840         21,064
EXPENSES:
Claims and claim adjustment expenses, net of reinsurance
  recoveries of $7,694 and $2,768 in 1998 and 1997,
  respectively..............................................     18,288         10,271
Commissions, net of reinsurance ceding commissions of $3,252
  and $549 in 1998 and 1997, respectively...................      2,964          2,201
Interest expense............................................         --          1,727
General and administrative expenses
  Underwriting..............................................      7,027          4,803
  Other.....................................................        179            181
  Goodwill..................................................        304             --
                                                                -------        -------
          Total Expenses....................................     28,762         19,183
                                                                -------        -------
Income Before Income Taxes, Preferred Securities Dividends
  and Accretion.............................................      6,078          1,881
Income tax expense..........................................      2,311            671
                                                                -------        -------
Income Before Preferred Securities Dividends and
  Accretion.................................................      3,767          1,210
Preferred Securities dividends and accretion, net of income
  tax benefit of $234 in 1997...............................         --           (454)
Trust Preferred Securities dividends and accretion, net of
  income tax benefit of $964 in 1998........................     (1,872)            --
                                                                -------        -------
NET INCOME..................................................    $ 1,895        $   756
                                                                =======        =======
BASIC EARNINGS PER SHARE:
  Income Before Preferred Securities Dividends and
     Accretion..............................................    $  0.64        $  0.35
  Preferred securities dividends and accretion..............      (0.32)         (0.13)
                                                                =======        =======
NET INCOME..................................................    $  0.32        $  0.22
                                                                =======        =======
DILUTED EARNINGS PER SHARE:
  Income Before Preferred Securities Dividends and
     Accretion..............................................    $  0.48        $  0.23
Preferred securities dividends and accretion................      (0.24)         (0.09)
                                                                =======        =======
NET INCOME..................................................    $  0.24        $  0.14
                                                                =======        =======
</TABLE>
 
           See Notes to Condensed Consolidated Financial Statements.
                                      F-38
<PAGE>   174
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
      CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
 
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                            ACCUMULATED
                                                        OTHER COMPREHENSIVE
                                                              INCOME
                                                        -------------------
                                                            UNREALIZED
                                 NUMBER OF                  GAIN (LOSS)       PAID IN                                   TOTAL
                                  SHARES      COMMON            ON            CAPITAL    COMPREHENSIVE   RETAINED   STOCKHOLDERS'
                                OUTSTANDING    STOCK        INVESTMENTS       WARRANTS      INCOME       EARNINGS      EQUITY
                                -----------   -------   -------------------   --------   -------------   --------   -------------
<S>                             <C>           <C>       <C>                   <C>        <C>             <C>        <C>
Balance at December 31,
  1996........................   3,446,492    $16,022         $ (162)          $2,206                    $27,125       $45,191
Comprehensive income
  Net income..................          --         --             --               --        (5,141)      (5,141)       (5,141)
                                                                                            -------
  Other comprehensive income,
    net of tax change in
    unrealized gain (loss) on
    investments...............          --         --          1,489               --         1,489           --         1,489
                                                                                            -------
  Other comprehensive
    income....................                                                                1,489
                                                                                            -------
Comprehensive income..........                                                              $(3,652)
                                                                                            =======
Common stock issued...........   2,390,438     18,000             --               --                         --        18,000
Stock issued under stock
  option plan.................      22,127        105             --               --                         --           105
Common stock issued under
  stock incentive plan........      12,222        174             --               --                         --           174
                                 ---------    -------         ------           ------                    -------       -------
Balance at December 31,
  1997........................   5,871,279     34,301          1,327            2,206                     21,984        59,818
                                 ---------    -------         ------           ------                    -------       -------
Comprehensive income
  Net income..................          --         --             --               --         1,895        1,895         1,895
                                                                                            -------
  Other comprehensive income,
    net of tax change in
    unrealized gain (loss) on
    investments...............          --         --             80               --            80           --            80
                                                                                            -------
  Other comprehensive
    income....................                                                                   80
                                                                                            -------
Comprehensive income..........                                                              $ 1,975
                                                                                            =======
Common stock issued...........          --         --             --               --                         --            --
Stock issued under stock
  option plan.................       3,100         15             --               --                         --            15
Common stock issued under
  stock incentive plan........          --         --             --               --                         --            --
                                 ---------    -------         ------           ------                    -------       -------
Balance at March 31, 1998.....   5,874,379    $34,316         $1,407           $2,206                    $23,879       $61,808
                                 =========    =======         ======           ======                    =======       =======
</TABLE>
 
           See Notes to Condensed Consolidated Financial Statements.
                                      F-39
<PAGE>   175
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                               THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              --------------------
                                                                1998        1997
                                                              --------    --------
<S>                                                           <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income..................................................  $  1,895    $    756
                                                              --------    --------
Adjustments to reconcile net (loss) income to net cash used
  in operating activities:
  Discount (amortization) of bonds and preferred stock......         2        (161)
  Amortization of capital lease obligation..................      (435)         --
  Gain on sale of investments...............................      (400)         (9)
  Amortization of Goodwill..................................       304          --
  Preferred securities dividends and accretion..............     1,872         687
  Increase in reinsurance balances receivable...............    (2,516)       (700)
  Decrease in premiums receivable...........................     2,709          72
  (Increase) decrease in earned but unbilled premiums
    receivable..............................................      (267)        801
  Decrease (increase) in accrued investment income..........       330        (106)
  Increase in deferred policy acquisition costs.............      (108)     (1,206)
  Decrease in deferred income taxes.........................     2,180         433
  Decrease (increase) in funds held by reinsurer............       966        (372)
  (Increase) decrease in prepaid reinsurance premiums.......    (3,783)        281
  Increase in other assets..................................    (3,927)       (658)
  Decrease in claims and claim adjustment expense
    reserves................................................   (20,922)     (8,771)
  Increase in unearned premium reserves.....................     1,697         744
  Increase (decrease) in reinsurance payable................     3,971        (258)
  (Decrease) increase in accounts payable and other
    liabilities.............................................    (4,197)        494
                                                              --------    --------
         Total adjustments..................................   (22,524)     (8,729)
                                                              --------    --------
    Net cash used in operating activities...................   (20,629)     (7,973)
                                                              --------    --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Paid-in-capital -- restricted stock.......................        15          --
  Retirement of long-term debt -- Imperial Bank.............        --        (350)
  Funding of Discontinued Operations........................    (1,492)         --
  Retirement of long-term debt -- Chase Financing...........        --      (1,664)
                                                              --------    --------
    Net cash used in financing activities...................    (1,477)     (2,014)
                                                              --------    --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of bonds and notes:
    Investments available-for-sale..........................   (58,436)    (21,297)
  Purchase of equity security...............................      (477)       (145)
    Increase in receivable from reinsurer...................        --       1,627
  Sale of property, plant and equipment.....................     8,000          --
  Sales of bonds and notes: Investments
    available-for-sale......................................    51,344       9,919
  Maturities of bonds and notes:
    Investments available-for-sale..........................     2,709       2,683
  Net decrease in invested cash.............................        80         243
                                                              --------    --------
    Net cash provided by (used in) investing activities.....     3,220      (6,970)
                                                              --------    --------
    Net decrease in cash....................................   (18,886)    (16,957)
Cash and invested cash at Beginning of Period...............    35,376     101,937
                                                              --------    --------
Cash and invested cash at End of Period.....................  $ 16,490    $ 84,980
                                                              ========    ========
Supplemental disclosure of cash flow information:
Cash paid during the year for income taxes..................  $    131    $      4
                                                              ========    ========
Cash paid during the year for interest......................  $     --    $    141
                                                              ========    ========
</TABLE>
 
            See Notes to Condensed Consolidated Financial Statements
 
                                      F-40
<PAGE>   176
 
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                   FOR THE THREE MONTHS ENDED MARCH 31, 1998
                                  (UNAUDITED)
 
NOTE A. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
A.1  BASIS OF PRESENTATION
 
     Superior National Insurance Group, Inc. ("SNIG") is a holding company that
through its wholly-owned subsidiaries, Superior National Insurance Company
("SNIC") and Superior Pacific Casualty Company ("SPCC"), is engaged in writing
workers' compensation insurance principally in the States of California and
Arizona, and until September 30, 1993, was engaged in writing commercial
property and casualty insurance. The "Company" refers to SNIG and its
subsidiaries.
 
     The accompanying unaudited condensed consolidated financial statements of
the Company have been prepared in accordance with generally accepted accounting
principles for interim financial information and with the instructions to Form
10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of
the information and footnotes required by generally accepted accounting
principles for complete financial statements. In the opinion of management, all
adjustments, including normally occurring accruals, considered necessary for a
fair presentation have been included. Certain reclassifications of prior year
amounts have been made to conform with the 1998 presentation. Operating results
for the three months ended March 31, 1998 are not necessarily indicative of the
results to be expected for the year ending December 31, 1998. These consolidated
financial statements should be read in conjunction with the consolidated
financial statements and footnotes thereto contained in the Company's Annual
Report on Form 10-K for the year ended December 31, 1997.
 
A.2  ACQUISITION OF PAC RIM HOLDING CORPORATION
 
     On April 11, 1997, the Company completed its acquisition of Pac Rim Holding
Corporation ("Pac Rim") and its wholly-owned subsidiary, The Pacific Rim
Assurance Company, for total consideration of approximately $42.0 million in
cash. This consideration resulted in payments of approximately $20.0 million to
Pac Rim stockholders; $20.0 million to Pac Rim's convertible debenture holders;
and $2.0 million to Pac Rim's warrant and option holders. In addition, the
Company incurred $2.0 million in transaction fees and related expenses. The
Pacific Rim Assurance Company was renamed Superior Pacific Casualty Company upon
its acquisition by the Company. The Company financed the acquisition of Pac Rim
through a $44.0 million term loan and the sale of $18.0 million in newly issued
shares of common stock in a private transaction. Approximately $6.6 million of
the loan proceeds was used to prepay SNIG's previously outstanding long-term
debt, and approximately $10.0 million was contributed by SNIG to the capital of
SPCC. The $44.0 million term loan was subsequently retired from funds raised
from the sale of $105.0 million of 10.75% Trust Preferred Securities.
 
     The purchase of Pac Rim resulted in $36.9 million of goodwill that is being
amortized on a straight line basis over 27.5 years. The transaction was
accounted for using the purchase method and the results of operations since the
date of acquisition have been included in operations. The designated accounting
date of the purchase of Pac Rim is April 1, 1997.
 
     The balance sheet of Pac Rim at the acquisition date included the following
assets: investments of $105.9 million, cash of $2.6 million, receivables of
$17.3 million, and other assets of $22.3 million. Liabilities assumed in the
acquisition included unearned premiums of $6.9 million, claim and claim
adjustment expense reserves of $107.7 million and other liabilities of $32.3
million.
 
                                      F-41
<PAGE>   177
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                   FOR THE THREE MONTHS ENDED MARCH 31, 1998
                                  (UNAUDITED)
 
A.3  EARNINGS PER SHARE ("EPS"); COMPREHENSIVE INCOME
 
     In February 1997, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standard No. 128 ("FAS No. 128"), "Earnings Per Share",
which requires presentation of basic and diluted earnings per share for all
publicly traded companies effective for fiscal years after December 15, 1997.
 
     The following is an illustration of the reconciliation of the numerators
and denominators of the basic and diluted earnings per share (EPS) computations:
 
<TABLE>
<CAPTION>
                                  THREE MONTHS ENDED MARCH 31, 1998            THREE MONTHS ENDED MARCH 31, 1997
                              ------------------------------------------   ------------------------------------------
                                  INCOME          SHARES       PER SHARE       INCOME          SHARES       PER SHARE
                               (NUMERATOR)     (DENOMINATOR)    AMOUNT      (NUMERATOR)     (DENOMINATOR)    AMOUNT
                              --------------   -------------   ---------   --------------   -------------   ---------
                              (IN THOUSANDS)                               (IN THOUSANDS)
<S>                           <C>              <C>             <C>         <C>              <C>             <C>
BASIC EPS
  Income before items
    below...................     $ 3,767         5,874,054      $ 0.64         $1,210         3,446,735      $ 0.35
  Preferred Securities......      (1,872)                        (0.32)          (454)                        (0.13)
                                 -------                        ------         ------                        ------
  Net Income................     $ 1,895                        $ 0.32         $  756                        $ 0.22
                                 =======                        ======         ======                        ======
EFFECT OF DILUTIVE
  SECURITIES
  Options...................                       336,473                                      344,175
  Warrants..................                     1,571,087                                    1,455,609
DILUTED EPS
  Income before items
    below...................     $ 3,767         7,781,614      $ 0.48         $1,210         5,246,519      $ 0.23
  Preferred Securities......      (1,872)                        (0.24)          (454)                        (0.09)
                                 -------                        ------         ------                        ------
  Net Income................     $ 1,895                        $ 0.24         $  756                        $ 0.14
                                 =======                        ======         ======                        ======
</TABLE>
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard No. 130, "Reporting Comprehensive Income" ("SFAS
No. 130"). SFAS 130 is effective for periods ending after December 15, 1997,
including interim periods. SFAS No. 130 requires companies to report
comprehensive income and its components in a financial statement and display the
accumulated balance of other comprehensive income separately from retained
earnings and additional paid-in-capital. Comprehensive income includes all
changes in equity during a period except those resulting from investments by
stockholders and distributions to stockholders. The Company has included the
required disclosure of SFAS No. 130 in this filing.
 
A.4  CLAIM AND CLAIM ADJUSTMENT EXPENSE RESERVES
 
     The liability for unpaid claim and claim adjustment expenses is based on an
evaluation of reported losses and on estimates of incurred but unreported
losses. The reserve liabilities are determined using adjusters' individual case
estimates and statistical projections, which can be affected by many external
factors that are difficult to predict, including changes in the economy, trends
in medical treatments and litigation, changes in regulatory environment, medical
services, and employment rights. The liability is reported net of estimated
salvage and subrogation recoverables. Adjustments to the liability resulting
from subsequent developments or revisions to the estimate are reflected in
results of operations in the period in which such adjustments become known.
While there can be no assurance that reserves at any given date are adequate to
meet the Company's obligations, the amounts reported on the balance sheet are
management's best estimate of that amount.
 
                                      F-42
<PAGE>   178
                    SUPERIOR NATIONAL INSURANCE GROUP, INC.
                                AND SUBSIDIARIES
 
        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                   FOR THE THREE MONTHS ENDED MARCH 31, 1998
                                  (UNAUDITED)
 
A.5  TRUST PREFERRED SECURITIES
 
     In December 1997, SNIG formed a trust, whose sole purpose was to issue 10
3/4% Trust Preferred Securities (the "Trust Preferred Securities"), having an
aggregate liquidation amount of $105 million, and to invest the proceeds thereof
in an equivalent amount of 10 3/4% Senior Subordinated Notes due 2017 of the
Company (the "Senior Subordinated Notes"). The Company owns directly all of the
common securities issued by the Trust, which it purchased for an aggregate
consideration of $3.25 million. The proceeds from the sale of the Trust
Preferred Securities were used solely to purchase SNIG's Senior Subordinated
Notes in the aggregate principal amount of $108.25 million, which are the sole
assets of the trust. In addition, the Company entered into several contractual
undertakings, that when taken together, guarantee to the holders of the Trust
Preferred Securities an unconditional right to enforce the payment of the
distributions with respect to such securities.
 
NOTE B. DISCONTINUED OPERATIONS
 
     Outstanding discontinued operations claims and claim adjustment expense
reserves were $12.1 million at March 31, 1998, which was consistent with
management's expectations. Offsetting these liabilities are $11.4 million of
deferred tax assets and $0.7 million of reinsurance recoverable on paid claim
and claim adjustment expenses.
 
                                      F-43
<PAGE>   179
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
<S>                                                           <C>
INDEPENDENT AUDITORS' REPORT................................  F-45
COMBINED FINANCIAL STATEMENTS:
  Combined Balance Sheets as of December 31, 1997 and
     1996...................................................  F-46
  Combined Statements of Operations for Each of the Three
     Years Ended December 31, 1997..........................  F-47
  Combined Statements of Stockholder's Equity for Each of
     the Three Years
     Ended December 31, 1997................................  F-48
  Combined Statements of Cash Flows for Each of the Three
     Years Ended December 31, 1997..........................  F-49
  Notes to Combined Financial Statements....................  F-50
</TABLE>
 
                                      F-44
<PAGE>   180
 
                          INDEPENDENT AUDITORS' REPORT
 
To the Board of Directors of
  Business Insurance Group, Inc.:
 
     We have audited the accompanying combined balance sheets of the Insurance
Operations of Business Insurance Group, Inc. (the "Company") as of December 31,
1997 and 1996 and the related combined statements of operations, stockholder's
equity, and cash flows for each of the three years ended December 31, 1997.
These combined financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these combined
financial statements based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the combined financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.
 
     In our opinion, such combined financial statements present fairly, in all
material respects, the financial position of the Insurance Operations of
Business Insurance Group, Inc. at December 31, 1997 and 1996, and the results of
their operations and their cash flows for each of the three years ended December
31, 1997 in conformity with generally accepted accounting principles.
 
DELOITTE & TOUCHE LLP
San Francisco, California
June 19, 1998
 
                                      F-45
<PAGE>   181
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                            COMBINED BALANCE SHEETS
                           DECEMBER 31, 1997 AND 1996
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                 1997          1996
                                                              ----------    ----------
                                                                   (IN THOUSANDS)
<S>                                                           <C>           <C>
Invested Assets:
  Bonds, available-for-sale, at fair value..................  $  611,163    $  671,629
  Bonds, held-to-maturity, at amortized cost................      14,059        15,978
  Real estate...............................................      29,821        31,184
  Note from parent..........................................      10,000        10,000
  Cash and cash equivalents.................................      98,128        25,861
                                                              ----------    ----------
         TOTAL INVESTED ASSETS..............................     763,171       754,652
Reinsurance recoverable:
  Paid loss and loss adjustment expenses....................      18,518        14,939
  Unpaid loss and loss adjustment expenses..................     206,871       121,170
Premiums receivable -- Net..................................      80,008        84,575
Earned but unbilled premiums receivable.....................      24,401        17,876
Accrued investment income...................................      10,605        12,812
Receivable from reinsurer...................................       4,132            --
Deferred policy acquisition costs...........................      23,841        19,946
Income taxes receivable from parent.........................      40,857        19,933
Deferred income taxes.......................................      15,807        14,665
Prepaid reinsurance premiums................................          --        10,659
Goodwill....................................................      14,266         9,964
Property and equipment -- Net...............................      14,556         9,922
Prepaid expenses and other assets...........................       5,373         2,660
                                                              ----------    ----------
         TOTAL ASSETS.......................................  $1,222,406    $1,093,773
                                                              ==========    ==========
                         LIABILITIES AND STOCKHOLDER'S EQUITY
Liabilities:
  Loss and loss adjustment expenses.........................  $  728,421    $  590,595
  Unearned premiums.........................................      45,004        44,010
  Reinsurance payable.......................................      28,027        35,478
  Long-term debt due to parent..............................     121,750       128,250
  Policyholder dividends....................................       3,015         3,385
  Accounts payable and other liabilities....................      43,843        24,163
                                                              ----------    ----------
         TOTAL LIABILITIES..................................     970,060       825,881
                                                              ----------    ----------
                                STOCKHOLDER'S EQUITY:
Unrealized gains on investments, net of deferred taxes......       4,870         1,799
Invested capital............................................     247,476       266,093
                                                              ----------    ----------
         Total Stockholder's Equity.........................     252,346       267,892
                                                              ----------    ----------
         TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY.........  $1,222,406    $1,093,773
                                                              ==========    ==========
</TABLE>
 
                  See notes to combined financial statements.
                                      F-46
<PAGE>   182
 
           THE INSURANCE OPERATIONS OF BUSINESS INSURANCE GROUP, INC.
 
                       COMBINED STATEMENTS OF OPERATIONS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                               1997        1996        1995
                                                             --------    --------    --------
                                                                      (IN THOUSANDS)
<S>                                                          <C>         <C>         <C>
REVENUES:
  Net premiums earned......................................  $515,272    $480,828    $390,974
  Net investment income....................................    37,548      33,317      24,005
  Net realized gain on investments.........................     7,176         892       1,667
  Other income.............................................     3,512       2,823         248
                                                             --------    --------    --------
          TOTAL REVENUES...................................   563,508     517,860     416,894
                                                             --------    --------    --------
EXPENSES:
  Loss and loss adjustment, net of reinsurance
     recoveries............................................   443,204     381,897     245,522
  Underwriting expenses....................................   168,187     107,640     114,918
  Policyholder dividends...................................       793      (5,250)      5,494
  Interest.................................................     8,326       4,330          --
  Goodwill.................................................     1,262         909         256
                                                             --------    --------    --------
          TOTAL EXPENSES...................................   621,772     489,526     366,190
                                                             --------    --------    --------
Income (Loss) Before Income Taxes..........................   (58,264)     28,334      50,704
Income Tax Benefit (Expense)...............................    28,847      (2,934)    (12,952)
                                                             --------    --------    --------
          NET INCOME (LOSS)................................  $(29,417)   $ 25,400    $ 37,752
                                                             ========    ========    ========
</TABLE>
 
                  See notes to combined financial statements.
                                      F-47
<PAGE>   183
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                  COMBINED STATEMENTS OF STOCKHOLDER'S EQUITY
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                            NET UNREALIZED                  TOTAL
                                                             GAIN (LOSS)     INVESTED   STOCKHOLDER'S
                                                            ON INVESTMENTS   CAPITAL       EQUITY
                                                            --------------   --------   -------------
                                                                     (AMOUNTS IN THOUSANDS)
<S>                                                         <C>              <C>        <C>
Balance at December 31, 1994..............................     $(15,456)     $163,769     $148,313
Net income................................................                     37,752       37,752
Unrealized gain on available for sale investments, net of
  deferred taxes..........................................       16,791                     16,791
Capital contributions.....................................                     37,422       37,422
                                                               --------      --------     --------
Balance at December 31, 1995..............................        1,335       238,943      240,278
Net income................................................                     25,400       25,400
Capital contributions.....................................                      1,750        1,750
Unrealized gain on available for sale investments, net of
  deferred taxes..........................................          464                        464
                                                               --------      --------     --------
Balance at December 31, 1996..............................        1,799       266,093      267,892
Net loss..................................................                    (29,417)     (29,417)
Capital contributions.....................................                     10,800       10,800
Unrealized gain on available for sale investments, net of
  deferred taxes..........................................        3,071                      3,071
                                                               --------      --------     --------
Balance at December 31, 1997..............................     $  4,870      $247,476     $252,346
                                                               ========      ========     ========
</TABLE>
 
                  See notes to combined financial statements.
                                      F-48
<PAGE>   184
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                       COMBINED STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                1997       1996        1995
                                                              --------   ---------   ---------
                                                                   (AMOUNTS IN THOUSANDS)
<S>                                                           <C>        <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss).........................................  $(29,417)  $  25,400   $  37,752
                                                              --------   ---------   ---------
  Adjustments to reconcile net income to net cash provided
    by (used in) operating activities:
    Amortization of bond premium............................     1,813       4,261       4,933
    Depreciation of real estate.............................       658         813         323
    Depreciation on property, plant and equipment...........     2,876       2,558       1,129
    Loss (gain) on sale of investments......................    (7,256)       (597)     (1,228)
    Loss (gain) on sale of real estate......................        80        (295)       (439)
    Amortization of goodwill................................     1,262         909         256
    (Increase) decrease in reinsurance recoverables.........   (89,280)    (54,564)     23,028
    (Increase) decrease in premiums receivable..............     4,567     (28,118)    (11,408)
    (Increase) decrease in earned but unbilled
     receivables............................................    (6,525)     (2,289)     (9,865)
    (Increase) decrease in accrued investment income........     2,207       1,000      (7,178)
    (Increase) decrease in receivable from reinsurer........    (4,132)         --          --
    (Increase) decrease in deferred policy acquisition
     costs..................................................    (3,895)     (5,934)      1,222
    (Increase) decrease in income taxes receivable..........   (20,924)    (14,829)     (5,104)
    (Increase) decrease in deferred income taxes............    (2,808)      3,046        (973)
    (Increase) decrease in prepaid reinsurance premiums.....    10,659     (10,659)         11
    (Increase) decrease in prepaid and other assets.........    (2,713)     (5,286)      4,720
    Increase (decrease) in loss and loss adjustment
     expenses...............................................   137,826     147,146      30,783
    Increase (decrease) in unearned premium reserves........       994      20,198       6,103
    Increase (decrease) in reinsurance payable..............    (7,451)     33,192      (6,338)
    Increase (decrease) in policyholder dividend payable....      (370)     (6,086)    (12,086)
    Increase (decrease) in accounts payable and other
     liabilities............................................    19,680      (5,033)     10,209
                                                              --------   ---------   ---------
        Total adjustments...................................    37,268      79,433      28,098
                                                              --------   ---------   ---------
        Net cash provided by operating activities...........     7,851     104,833      65,850
                                                              --------   ---------   ---------
Cash flows from investing activities:
  Purchases of bonds available for sale.....................  (280,184)   (350,311)   (155,958)
  Sales of bonds available for sale.........................   350,947     119,334      57,569
  Maturities of bonds held to maturity......................     1,801       1,248       7,258
  Purchases of property, plant and equipment................    (7,509)     (6,353)     (4,064)
  Purchases of real estate..................................       (13)     (1,647)    (34,916)
  Sales of real estate......................................       638         487      10,570
                                                              --------   ---------   ---------
        Net cash provided by (used in) investing
        activities..........................................    65,680    (237,242)   (119,541)
                                                              --------   ---------   ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Proceeds from issuance of long-term debt................        --     130,000          --
    Principal payments on long-term debt....................    (6,500)     (1,750)         --
    Capital contributions...................................    10,800       1,750      37,422
    Excess of book value over net assets acquired...........    (5,564)         --      (6,109)
                                                              --------   ---------   ---------
        Net cash provided by (used in) financing
        activities..........................................    (1,264)    130,000      31,313
                                                              --------   ---------   ---------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS........    72,267      (2,409)    (22,378)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR..............    25,861      28,270      50,648
                                                              --------   ---------   ---------
CASH AND CASH EQUIVALENTS AT END OF YEAR....................  $ 98,128   $  25,861   $  28,270
                                                              ========   =========   =========
</TABLE>
 
                  See notes to combined financial statements.
                                      F-49
<PAGE>   185
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                     NOTES TO COMBINED FINANCIAL STATEMENTS
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
1. BASIS OF PRESENTATION
 
     Business Insurance Group, Inc. ("BIG"), is an insurance holding company and
ultimately a wholly owned subsidiary of Foundation Health Systems, Inc. ("FHS").
BIG serves as the immediate parent company for four workers' compensation
insurance subsidiary companies as well as certain non-insurance entities. On May
5, 1998, FHS entered into a definitive agreement to sell BIG and its four
insurance subsidiaries [California Compensation Insurance Company ("CalComp"),
Business Insurance Company ("BICO"), Combined Benefits Insurance Company
("CBIC"), and Commercial Compensation Insurance Company ("CCIC")] to Superior
National Insurance Group, Inc. ("Superior") of Calabasas, California. The
transaction, subject to customary closing conditions including regulatory
approvals and a favorable vote from Superior's shareholders, is expected to
close in the fourth quarter of 1998.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Principles of Combination -- The accompanying combined financial statements
include the accounts of BIG and its insurance subsidiaries, CalComp, BICO, CBIC
and CCIC (together with BIG, the "Company"). BIG is also the parent company of
Foundation Integrated Risk Management Solutions, Inc. ("FIRMS"), which is a
workers' compensation risk management and third party claims administrator, and
Foundation Health Medical Resources Management ("ReviewCo.") which provides bill
review, access to provider networks and other managed care service for workers'
compensation carriers and third party administrators. FIRMS and ReviewCo. are
not included in the sale to Superior. Therefore, for purposes of this report,
the operations, assets and liabilities of these non-insurance subsidiaries are
not included in the accompanying financial statements. Also, under the terms of
the agreement with Superior, certain assets and liabilities (including the note
from parent, long-term debt due to parent and other intercompany balances) will
be settled at or prior to the closing of the transaction. In addition,
investment real estate will be purchased by FHS at book value prior to or at the
closing date of the transaction.
 
     For the periods presented, certain revenues, costs and expenses reflected
in the combined financial statements include allocations to the Company by FHS
and amounts charged or received through various transactions with affiliates
(see Note 10). Management believes that the foregoing allocations and fees were
made on a reasonable basis; however, they do not necessarily equal the costs
which would have been incurred on a stand-alone basis.
 
     The financial information included herein does not necessarily reflect the
financial position and results of operations in the future or what the financial
position and results of operations would have been had the Company been a
separate, stand-alone entity during the periods presented.
 
     The Company's combined financial statements have been prepared on the basis
of generally accepted accounting principles. The results of all significant
intercompany transactions have been eliminated.
 
     Cash and Cash Equivalents -- Cash includes currency on hand and demand
deposits with financial institutions. Cash equivalents represent short-term,
highly liquid investments, readily convertible to known amounts of cash and near
maturity such that there is insignificant risk of changes in fair value because
of changes in interest rates. Cash equivalents are carried at cost, which
approximates fair value.
 
     Investments in debt instruments consist primarily of bonds. Debt
instruments are classified as (i) "available-for-sale" (carried at fair value
with differences between amortized cost and fair value being reflected as a
separate component of stockholder's equity, net of applicable income tax
effect); (ii) "held-to-maturity" (carried at amortized cost); or (iii) "trading"
(carried at fair value with differences between cost and fair value being
reflected in the results of operations). Securities not designated as
held-to-maturity have
                                      F-50
<PAGE>   186
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
been designated as available-for-sale. The Company did not have any investments
categorized as trading securities. For determining realized gains or losses on
securities sold, cost is determined using the specific identification method.
The premiums and discounts on fixed maturities are amortized using the effective
yield method. Current fair values of investments are obtained from published
sources. Declines in fair value that are considered other than temporary are
charged to operations.
 
     Investment real estate which the Company has held for the production of
income is carried at depreciated cost less any write-downs to fair value for
impairment losses. Depreciation on real estate is computed using the
straight-line method over the estimated lives of the properties.
 
     The Company does not own any investments that qualify as derivatives as
defined by Statement of Financial Accounting Standard No. 119, Disclosure About
Derivative Financial Investments and Fair Value of Financial Investments.
 
     Premiums Receivable -- The Company records premiums receivable for both
billed and unbilled amounts. Unbilled premiums receivable primarily represent
the Company's estimated billings on payroll reporting policies which were earned
but not billed prior to year end. Unbilled premiums receivable also include
estimates of the difference between amounts billed on installment policies and
the amounts estimated to be ultimately billed on the policy. The Company uses
its historical experience to estimate earned but unbilled amounts which are
recorded as premiums earned. These unbilled amounts are estimates, and while the
Company believes such amounts are reasonable, there can be no assurance that the
ultimate amounts collected will equal the recorded unbilled amounts.
 
     The ultimate collectibility of the unbilled receivables can be affected to
a significant degree by general changes in the economy and the regulatory
environment due to the increased time required to determine the billable amount.
The Company considers these factors when estimating the receivable for unbilled
premiums. The allowance for doubtful accounts was $13,841 and $11,488 as of
December 31, 1997 and 1996, respectively.
 
     Deferred Policy Acquisition Costs -- Acquisition costs, consisting
principally of commissions, premium taxes, and certain marketing, policy
issuance, and underwriting costs related to the production of the Company's
workers' compensation business, are deferred and amortized ratably over the
terms of the policies. If recoverability of such costs is not anticipated, the
amounts not considered recoverable are charged against income. In determining
estimated recoverability, the computation gives effect to the premium to be
earned, related investment income, claims and claim adjustment expenses, and
certain other costs expected to be incurred as the premium is earned.
 
     Policy acquisition costs incurred and amortized into income are as follows:
 
<TABLE>
<CAPTION>
                                                   1997       1996       1995
                                                 --------   --------   --------
<S>                                              <C>        <C>        <C>
Balance at beginning of year...................  $ 19,946   $ 14,012   $ 15,234
Cost deferred during the year..................    40,069     35,926     24,561
Amortization charged to expense................   (36,174)   (29,992)   (25,783)
                                                 --------   --------   --------
Balance at end of year.........................  $ 23,841   $ 19,946   $ 14,012
                                                 ========   ========   ========
</TABLE>
 
     Losses and loss adjustment expenses ("LAE") are estimates based on
case-basis amounts of reported claims and unreported losses and loss adjustment
expenses based on experience and industry data. The provision for unpaid losses
and loss adjustment expenses, net of estimated salvage and subrogation, has been
 
                                      F-51
<PAGE>   187
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
established to cover the estimated net cost of incurred claims. The amounts are
necessarily based on estimates, and accordingly, there can be no assurance the
ultimate liability will not differ from such estimates.
 
     There is a high level of uncertainty inherent in the evaluation of the
required losses and loss adjustment expense reserves. Management has selected
ultimate losses and loss adjustment expenses that it believes will reasonably
reflect anticipated ultimate experience. The ultimate costs of such claims are
dependent upon future events, the outcomes of which are affected by many
factors. Claims reserving procedures and settlement philosophy, current and
perceived social and economic factors, inflation, current and future court
rulings and jury attitudes, and many other economic, legal, political, and
social factors all can have significant effects on the ultimate cost of claims.
Changes in Company operations and management philosophy also may cause actual
experience to vary from the historical trends.
 
     Policyholder Dividends -- Prior to the inception of open rating in
California in January 1995, policyholder dividends served both as an economic
incentive to employers for safe operations and as a means of price
differentiation; however, since the start of open rating, the consumer's
preference has been for the lowest net price at a policy's inception. This is
evidenced by the decline in participating policies written by the Company as a
percent of total policies from 20.9% of workers' compensation premiums in force
at December 31, 1995 to 3.4% and 2.7% at December 31, 1996 and 1997,
respectively. In 1995, as a result of the diminishing value of policyholder
dividends, the Company's management declared a moratorium on the payment of
policyholder dividends on California policies expiring between March 1, 1994 and
December 31, 1995. In December 1996, the Company formally discontinued
policyholder dividend payments on California policies expiring between March 1,
1994 and December 31, 1996. Estimated amounts to be returned to policyholders
for non-California policies are accrued when the related premium is earned. For
non-California business, dividends are paid to the extent that a surplus is
accumulated from premiums on workers' compensation policies.
 
     Premium Income Recognition -- Insurance premiums are earned ratably over
the terms of the policies. Unearned premiums are computed on a daily pro-rata
basis.
 
     Income Taxes -- The Company files a consolidated federal income tax return
which includes all qualifying subsidiaries, with FHS.
 
     Pursuant to a tax allocation agreement with FHS, the Company reflects a
provision for income taxes under the liability method as if it were to file
separate federal tax returns. In fiscal years in which the Company incurs net
losses, FHS allocates a tax benefit to the Company based on an appropriate tax
rate.
 
     Property, Equipment and Leasehold Improvements -- Property, equipment, and
leasehold improvements are stated at cost, net of accumulated depreciation and
amortization. Depreciation is computed using the straight-line method over the
lesser of estimated useful lives of the various classes of assets or the lease
term lives of the assets which range from 3 to 7 years.
 
     Expenditures for maintenance and repairs are expensed as incurred.
Significant improvements which increase the estimated useful life of an asset
are capitalized. Upon the sale or retirement of assets recorded cost and related
accumulated depreciation are removed from the accounts, and any gain or loss on
disposal is reflected in operations.
 
     Acquisitions and Related Goodwill -- In May 1997, Christiania General
Insurance Corporation of New York (renamed Commercial Compensation Insurance
Company) was purchased by the Company for $12,813, including goodwill of $5,564.
 
     In February 1995, London Guarantee and Accident Company of New York
(renamed Business Insurance Company) was purchased by the Company for $13,201,
including goodwill of $4,590.
                                      F-52
<PAGE>   188
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     In January 1995, Foundation Health Benefit Life Insurance Company (renamed
Combined Benefits Insurance Company) was purchased at book value by the Company
for $7,950.
 
     Goodwill represents the excess of the cost of companies acquired over the
fair value of their net assets at dates of acquisition and is being amortized on
the straight-line method over a range of 20-40 years.
 
     Concentrations of Credit Risk -- Financial instruments that potentially
subject the Company to concentrations of credit risk consist primarily of cash
equivalents, investments and premium receivables. All cash equivalents and
investments are managed within established guidelines which limit the amounts
which may be invested with one issuer. Concentrations of credit risk with
respect to premium receivables are limited due to the large number of payers
comprising the Company's customer base. The Company's ten largest employer
groups accounted for 3.7% and 3.2% of receivables as of December 31, 1997 and
1996, respectively, and 1.9%, 2.5% and 5.4% of premium revenue for the years
ended December 31, 1997, 1996 and 1995, respectively.
 
     Recently Issued Accounting Pronouncements -- During 1997, the Financial
Accounting Standards Board issued SFAS No. 130, Reporting Comprehensive Income,
which requires that an enterprise report, by major components and as a single
total, the change in its net assets during the period from non-owner sources;
SFAS No. 131, Disclosures About Segments of an Enterprise and Related
Information, which establishes annual and interim reporting standards for an
enterprise's business segments and related disclosures about its products,
services, geographic areas, and major customers; and SFAS No. 132, Employers'
Disclosures About Pensions and Other Postretirement Benefits, which revises and
standardizes pension and other benefit plan disclosures. Adoption of these
statements will not impact the Company's combined financial position, results of
operations or cash flows. These statements are effective for fiscal years
beginning after December 15, 1997.
 
     Use of Management Estimates -- The preparation of financial statements in
conformity with generally accepted accounting principles requires management to
make estimates and assumptions that affect the amounts of assets, liabilities,
and disclosures of contingent assets and liabilities at the date of the
financial statements. The Company has provided such estimates for its loss and
loss adjustment expenses; policyholder dividends; allowance for doubtful
accounts; deferred policy acquisition costs; earned but unbilled premiums; and
deferred taxes balances in its financial statements. While these estimates are
based upon analyses performed by management and outside actuaries, the amounts
the Company will ultimately pay or collect may differ materially from the
amounts presently estimated.
 
3. INVESTMENTS
 
     The amortized cost and fair values of bonds classified as
available-for-sale and held-to-maturity at December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                              GROSS        GROSS
                                                AMORTIZED   UNREALIZED   UNREALIZED     FAIR
                                                  COST        GAINS        LOSSES      VALUE
                                                ---------   ----------   ----------   --------
<S>                                             <C>         <C>          <C>          <C>
Available-for-sale:
  United States government agencies and
     authorities..............................  $ 43,454      $  233       $(102)     $ 43,585
  Collateralized mortgage obligations.........     2,999           1          --         3,000
  Corporate instruments.......................    16,263          52          --        16,315
  State and political subdivisions............   540,812       8,120        (779)      548,153
  Certificates of deposit.....................       110          --          --           110
                                                --------      ------       -----      --------
          Total available-for-sale............  $603,638      $8,406       $(881)     $611,163
                                                ========      ======       =====      ========
</TABLE>
 
                                      F-53
<PAGE>   189
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                       GROSS        GROSS
                                                         AMORTIZED   UNREALIZED   UNREALIZED    FAIR
                                                           COST        GAINS        LOSSES      VALUE
                                                         ---------   ----------   ----------   -------
<S>                                                      <C>         <C>          <C>          <C>
Held-to-maturity:
  United States government agencies and authorities....   $   763       $ --         $ (2)     $   761
  Corporate instruments................................        24         --           --           24
  State and political subdivisions.....................    12,847        198          (28)      13,017
  Certificates of deposit..............................       425         --           --          425
                                                          -------       ----         ----      -------
          Total held-to-maturity.......................   $14,059       $198         $(30)     $14,227
                                                          =======       ====         ====      =======
</TABLE>
 
     The amortized cost and estimated fair values of investments classified as
available-for-sale and held-to-maturity at December 1, 1997 by contractual
maturity are shown below. Expected maturities are likely to differ from
contractual maturities because borrowers may have the right to call or prepay
obligations with or without penalty. Mortgage-backed securities are included
based upon the expected payout pattern and duration of the fixed income
security.
 
<TABLE>
<CAPTION>
                                                          AVAILABLE-FOR-SALE
                                                         ---------------------
                                                         AMORTIZED      FAIR
                                                           COST        VALUE
                                                         ---------    --------
<S>                                                      <C>          <C>
Due in one year or less................................  $ 37,396     $ 37,426
Due after one year through five years..................   199,568      201,745
Due after five years through ten years.................   190,820      193,574
Due after ten years....................................   175,854      178,418
                                                         --------     --------
          Total........................................  $603,638     $611,163
                                                         ========     ========
</TABLE>
 
<TABLE>
<CAPTION>
                                                            HELD-TO-MATURITY
                                                          --------------------
                                                          AMORTIZED     FAIR
                                                            COST        VALUE
                                                          ---------    -------
<S>                                                       <C>          <C>
Due in one year or less.................................   $ 2,749     $ 2,756
Due after one year through five years...................     6,402       6,437
Due after five years through ten years..................     3,508       3,590
Due after ten years.....................................     1,400       1,444
                                                           -------     -------
          Total.........................................   $14,059     $14,227
                                                           =======     =======
</TABLE>
 
     The amortized cost and fair values of bonds classified as
available-for-sale and held-to-maturity at December 31, 1996 are as follows:
 
<TABLE>
<CAPTION>
                                                              GROSS        GROSS
                                                AMORTIZED   UNREALIZED   UNREALIZED     FAIR
                                                  COST        GAINS        LOSSES      VALUE
                                                ---------   ----------   ----------   --------
<S>                                             <C>         <C>          <C>          <C>
Available-for-sale:
  United States government agencies and
     authorities..............................  $ 60,679      $   41      $  (828)    $ 59,892
  State and political subdivisions............   608,051       5,952       (2,376)     611,627
  Certificates of deposit.....................       110          --           --          110
                                                --------      ------      -------     --------
          Total available-for-sale............  $668,840      $5,993      $(3,204)    $671,629
                                                ========      ======      =======     ========
</TABLE>
 
                                      F-54
<PAGE>   190
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                               GROSS        GROSS
                                                 AMORTIZED   UNREALIZED   UNREALIZED    FAIR
                                                   COST        GAINS        LOSSES      VALUE
                                                 ---------   ----------   ----------   -------
<S>                                              <C>         <C>          <C>          <C>
Held-to-maturity:
  United States government agencies
     and authorities...........................   $   766       $ --         $(16)     $   750
  State and political subdivisions.............    14,787        151          (42)      14,896
  Certificates of deposit......................       425         --           --          425
                                                  -------       ----         ----      -------
          Total held-to-maturity...............   $15,978       $151         $(58)     $16,071
                                                  =======       ====         ====      =======
</TABLE>
 
     A summary of net investment income for the years ended December 31 is as
follows:
 
<TABLE>
<CAPTION>
                                                         1997       1996       1995
                                                        -------    -------    -------
<S>                                                     <C>        <C>        <C>
Interest on bonds and notes...........................  $35,009    $29,303    $20,492
Interest on cash and cash equivalents.................    2,791      2,681      3,478
Real estate rental income.............................    1,959      2,774        757
                                                        -------    -------    -------
          Total investment income.....................   39,759     34,758     24,727
Investment expense....................................   (2,211)    (1,441)      (722)
                                                        -------    -------    -------
Net investment income.................................  $37,548    $33,317    $24,005
                                                        =======    =======    =======
</TABLE>
 
     Realized gains (losses) on investments for the years ended December 31 are
as follows:
 
<TABLE>
<CAPTION>
                                                              1997     1996     1995
                                                             ------    ----    ------
<S>                                                          <C>       <C>     <C>
Bonds......................................................  $7,256    $597    $1,228
Real estate................................................     (80)    295       439
                                                             ------    ----    ------
          Total............................................  $7,176    $892    $1,667
                                                             ======    ====    ======
</TABLE>
 
     The Company's investment real estate of $29,821 and $31,184 at December 31,
1997 and 1996, respectively, is held through direct ownership. The Company's
investment real estate consists of commercial properties, land and construction
in progress. In connection with the sale of the Company to Superior, FHS has
agreed to purchase the investment real estate at current book value prior to or
at the closing of the transaction.
 
     Proceeds from sales of bonds held as available-for-sale for the years ended
December 31, 1997, 1996, and 1995 were $350,947, $119,334 and $57,569,
respectively. Gross gains of $7,262 and gross losses of $6 were realized on
those sales in 1997. Gross gains of $689 and gross losses of $92 were realized
on those sales in 1996. Gross gains of $1,858 and gross losses of $630 were
realized on those sales in 1995.
 
     Bonds and other securities with a fair value of $480,584, $405,167 and
$340,676 at December 31, 1997, 1996 and 1995, respectively, were on deposit with
various insurance regulatory authorities.
 
4. FAIR VALUE OF FINANCIAL INSTRUMENTS
 
     The estimated fair value of cash equivalents, investments
available-for-sale, note from parent and long-term debt due to parent
approximate their carrying amounts in the financial statements and have been
determined by the Company using available market information and appropriate
valuation methodologies. The carrying amount of cash equivalents approximate
fair value due to the short-term maturity of those instruments. The fair values
of investments available-for-sale are estimated based upon quoted market prices
 
                                      F-55
<PAGE>   191
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
for the same or similar investments. In connection with the sale of the Company
to Superior, the note from parent and the long-term debt due to parent will be
settled at current book value; therefore, carrying amounts approximate fair
values. Considerable judgment is required to develop the estimates of fair
value. Accordingly, the estimates are not necessarily indicative of the amounts
the Company could have realized in a current market exchange. The use of
different market assumptions and/or estimation methodologies may have a material
effect on the estimated fair value amounts.
 
     The fair value estimates are based on pertinent information available to
management as of December 31, 1997 and 1996. Although management is not aware of
any factors that would significantly affect the estimated fair value amounts,
such amounts have not been comprehensively revalued for purposes of these
financial statements since that date and, therefore, current estimates of fair
value may differ significantly.
 
5. LOSSES AND LOSS ADJUSTMENT EXPENSE RESERVES
 
     The activity in the losses and loss adjustment expense reserve account is
summarized as follows:
 
<TABLE>
<CAPTION>
                                                        YEAR ENDED DECEMBER 31,
                                                  -----------------------------------
                                                    1997         1996         1995
                                                  ---------    ---------    ---------
<S>                                               <C>          <C>          <C>
Beginning reserve, gross of reinsurance.........  $ 590,595    $ 443,600    $ 412,666
Less reinsurance recoverable on unpaid losses
  and LAE.......................................   (121,170)     (76,154)     (90,326)
                                                  ---------    ---------    ---------
     Beginning reserve, net of reinsurance......    469,425      367,446      322,340
                                                  ---------    ---------    ---------
Provision for net losses and loss adjustment
  expenses:
  For losses occurring in current year..........    367,971      361,750      272,388
  For losses occurring in prior years...........     75,233       20,147      (26,866)
                                                  ---------    ---------    ---------
          Total losses and loss adjustment
            expenses............................    443,204      381,897      245,522
                                                  ---------    ---------    ---------
Payments for net losses and loss adjustment
  expenses:
  Attributable to insured events incurred in
     current year...............................   (135,202)    (106,757)     (71,899)
  Attributable to insured events incurred in
     prior years................................   (255,877)    (173,161)    (128,517)
                                                  ---------    ---------    ---------
          Total loss and loss adjustment expense
            payments............................   (391,079)    (279,918)    (200,416)
                                                  ---------    ---------    ---------
Ending reserves, net of reinsurance.............    521,550      469,425      367,446
Reinsurance recoverable on unpaid losses and
  LAE...........................................    206,871      121,170       76,154
                                                  ---------    ---------    ---------
Ending reserves, gross of reinsurance...........  $ 728,421    $ 590,595    $ 443,600
                                                  =========    =========    =========
</TABLE>
 
     In 1997, loss and LAE incurred in prior years increased by $75,233 due
primarily to unfavorable development of the 1996 and 1995 accident years. This
increase is primarily a result of a court ruling in late 1996 which expanded the
presumption of the treating physician related to California workers'
compensation workplace injuries in determining the disability of the injured
worker. This has led to increased severity on partial permanent disability
injuries.
 
     In 1996, the Company experienced $20,147 in adverse loss development on net
loss and LAE reserves estimated at December 31, 1995. The increase for prior
accident year loss and LAE reserves is primarily attributable to increases in
the estimates for the 1995 accident year, primarily due to changes in the
Company's average claim severity. On a per claim basis, the average gross case
loss reserve for the 1995 accident year increased 55.2% from 1995 to 1996, and
the average gross case loss paid for the 1995 accident year increased 37.8% from
1995 to 1996.
 
                                      F-56
<PAGE>   192
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     In 1995, the Company experienced $26,866 in favorable loss development on
net loss and LAE reserves estimated at December 31, 1994. The decrease in prior
accident year loss and LAE reserves is primarily attributable to reductions in
the estimates for the 1993 and 1994 accident years. The favorable impact of the
reforms passed by the California State Legislature in 1993 related to fraudulent
claims, as well as the impact from the Company's continued use of managed care
techniques, including network utilization and medical case management, also
contributed to the reduction in the prior year loss estimates.
 
6. INCOME TAXES
 
     Income tax expense (benefit) for the years ended December 31, 1997, 1996,
and 1995 is composed of the following amounts:
 
<TABLE>
<CAPTION>
                                                  1997       1996      1995
                                                --------    ------    -------
<S>                                             <C>         <C>       <C>
Current.......................................  $(26,039)   $ (112)   $16,619
Deferred......................................    (2,808)    3,046     (3,667)
                                                --------    ------    -------
          Total...............................  $(28,847)   $2,934    $12,952
                                                ========    ======    =======
</TABLE>
 
     A reconciliation of the statutory federal income tax rate and the effective
income tax rate is as follows for the years ended December'31:
 
<TABLE>
<CAPTION>
                                                       1997     1996     1995
                                                       -----    -----    ----
<S>                                                    <C>      <C>      <C>
Income taxes at statutory rates......................  (35.0)%   35.0%   35.0%
Effect of tax-exempt interest........................  (16.1)   (24.8)   (9.6)
Other................................................    1.6      0.2     0.1
                                                       -----    -----    ----
          Total......................................  (49.5)%   10.4%   25.5%
                                                       =====    =====    ====
</TABLE>
 
                                      F-57
<PAGE>   193
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     The tax effect of temporary differences that give rise to significant
portions of the deferred tax assets and liabilities at December 31 are presented
below:
 
<TABLE>
<CAPTION>
                                                           1997        1996
                                                         --------    --------
<S>                                                      <C>         <C>
Deferred tax assets:
  Allowance for doubtful accounts......................  $  4,844    $  4,021
  Accrued compensation.................................       794         376
  Accrued expenses.....................................       577         512
  Loss reserve discounting.............................    27,678      23,745
  Unearned premium liability...........................     3,150       2,335
  Policyholder dividends...............................       912         984
  Other, net...........................................        40          11
                                                         --------    --------
          Total deferred tax assets....................    37,995      31,984
                                                         ========    ========
Deferred tax liabilities:
  Bond discount........................................      (453)       (752)
  Depreciable and amortizable property.................   (10,735)     (8,597)
  Policy acquisition costs.............................    (8,344)     (6,981)
  Unrealized gain on available-for-sale investments....    (2,656)       (989)
                                                         --------    --------
          Total deferred tax liabilities...............   (22,188)    (17,319)
                                                         --------    --------
Net deferred tax assets................................  $ 15,807    $ 14,665
                                                         ========    ========
</TABLE>
 
7. REINSURANCE
 
     Under reinsurance agreements, the Company cedes various amounts of risk to
other insurance companies. A contingent liability exists with respect to
reinsured losses which would become an actual liability of the Company in the
event that the reinsurers should be unable to meet the obligations assumed by
them under the reinsurance agreements. The Company regularly evaluates the
financial condition of its reinsurers. Based on this evaluation, management
believes the reinsurers are creditworthy and that any potential losses on these
arrangements will not have a material impact on the Company.
 
     Effective January 1, 1996, the Company's insurance subsidiaries, CalComp,
BICO and CBIC, entered into a reinsurance pooling agreement. The agreement
applies to calendar year 1996 and subsequent net premiums earned, accident year
1996 and subsequent net loss and loss adjustment expenses incurred, and
underwriting expenses. Effective January 1, 1997, an additional affiliate, CCIC,
became a member of the agreement. The pooling percentages at December 31 were as
follows:
 
<TABLE>
<CAPTION>
                                                              1997     1996
                                                              -----    -----
<S>                                                           <C>      <C>
CalComp.....................................................   72.0%    83.5%
BICO........................................................   25.0     15.0
CBIC........................................................    1.5      1.5
CCIC........................................................    1.5       --
                                                              -----    -----
          Total.............................................  100.0%   100.0%
                                                              =====    =====
</TABLE>
 
                                      F-58
<PAGE>   194
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     CalComp acts as the lead company and assumes all gross business of the
pooling participants, and cedes to the participants their percentage of the
combined results. All authorized lines and types of business are subject to the
pooling arrangement.
 
     Effective July 1, 1996, the Company entered into a quota share reinsurance
agreement with General Reinsurance Corporation ("Gen Re") wherein Gen Re assumed
a 30% share of net premiums and related losses and allocated loss adjustment
expenses. Effective January 1, 1997, the quota share percentage on this
agreement was reduced to 7.5%, and effective July 1, 1997, this agreement was
terminated. Effective June 30, 1997, the Company commuted its 1990 - 1994 quota
share reinsurance agreement with Gen Re. Under terms of the commutation, Gen Re
paid $7,581 for ceded loss reserves of $7,259 and ceded loss adjustment expense
reserves of $570 offset by a $248 return of ceded commissions.
 
     Effective January 1, 1997, the Company entered into a six-month aggregate
excess of loss reinsurance agreement with Gen Re which provides coverage in
excess of $1,000 per occurrence. The agreement contains two layers of coverage,
the first, with a maximum of $37,250 in excess of the Company's retention of
$153,500 and the second, with a maximum of $5,500 in excess of the Company's
retention of $235,000. Premium for this coverage is based on the loss ratio and
consists of a fixed premium of $2,000 plus a variable reinsurance premium equal
to 14.6% of net loss sustained by the Company with a minimum of $28,000 and a
maximum of $31,500.
 
     Effective July 1, 1997, a second six-month aggregate excess of loss
agreement was entered into with Gen Re which provides coverage in excess of
$1,000 per occurrence. The agreement also contains two layers of coverage, the
first, with a maximum of $75,000 in excess of the Company's retention of
$150,977 and the second, with a maximum of $13,000 in excess of the Company's
retention of $251,251. Premium for this coverage is based on the loss ratio and
consists of a fixed premium of $4,000 plus a variable reinsurance premium equal
to 24.77% of net loss sustained by the Company with a minimum of $56,000 and a
maximum of $60,500.
 
     The Company maintains specific excess reinsurance with various reinsurers
which provides coverage in excess of $1,000 per occurrence for 1997 and 1996.
The agreements provide coverage up to a maximum of $200,000 per occurrence,
including the Company's retention for 1997 and 1996.
 
     In addition, effective April 1, 1995, the Company entered into an excess of
loss treaty with FH Assurance Company ("FHAC"), an affiliated reinsurer. The
treaty provides coverage for $100 in excess of $400 per occurrence for those
policies written in California through December 31, 1996, and, nationwide,
thereafter. Effective January 1, 1998, the treaty with FHAC was terminated.
 
                                      F-59
<PAGE>   195
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     The effect of reinsurance on premiums written, change in unearned premiums
and losses and LAE for each of the years ended December 31, are shown in the
following tables.
 
<TABLE>
<CAPTION>
                                             1997         1996         1995
                                           ---------    ---------    --------
<S>                                        <C>          <C>          <C>
Premiums written:
  Gross..................................  $ 668,906    $ 641,113    $421,422
  Ceded..................................   (141,981)    (150,746)    (24,345)
                                           ---------    ---------    --------
Net premiums written.....................  $ 526,925    $ 490,367    $397,077
                                           =========    =========    ========
Change in unearned premiums:
  Gross..................................  $     994    $  20,198    $  6,103
  Ceded..................................     10,659      (10,659)         --
                                           ---------    ---------    --------
Net change in unearned premiums..........  $  11,653    $   9,539    $  6,103
                                           =========    =========    ========
Losses and loss adjustment expenses:
  Losses and loss adjustment expenses....  $ 601,688    $ 468,533    $254,401
  Reinsurance recoveries.................   (158,484)     (86,636)     (8,879)
                                           ---------    ---------    --------
Net loss and loss adjustment expenses....  $ 443,204    $ 381,897    $245,522
                                           =========    =========    ========
</TABLE>
 
     The Company has an aggregate unsecured recoverable for losses, paid and
unpaid, including incurred but not reported, LAE and unearned premiums from
individual reinsurers in excess of 3% of the Company's surplus at December 31 as
follows:
 
<TABLE>
<CAPTION>
                                                           1997        1996
                                                         --------    --------
<S>                                                      <C>         <C>
General Reinsurance Corporation........................  $194,462    $122,205
                                                         ========    ========
</TABLE>
 
     In connection with the sale of the Company to Superior, the Company has
obtained a binding commitment for an Aggregate Excess of Loss reinsurance
agreement with a third-party reinsurer. The agreement will provide $150,000 of
adverse loss development indemnification on the Company's December 31, 1997 loss
and LAE reserves.
 
     In addition, the Company has obtained a binding commitment for a second
Aggregate Excess of Loss reinsurance agreement providing $25,000 of adverse loss
development indemnification for claims which have occurred during the period
from January 1, 1998 until the date at which the sale transaction closes.
 
8. PROPERTY AND EQUIPMENT
 
<TABLE>
<CAPTION>
                                                            1997       1996
                                                           -------    -------
<S>                                                        <C>        <C>
Property and equipment...................................  $20,826    $13,483
Leasehold improvements...................................    2,875      2,708
Accumulated depreciation.................................   (9,145)    (6,269)
                                                           -------    -------
Net property and equipment...............................  $14,556    $ 9,922
                                                           =======    =======
</TABLE>
 
                                      F-60
<PAGE>   196
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
9. STATUTORY SURPLUS AND DIVIDEND RESTRICTIONS
 
     CalComp and CBIC are domiciled in the State of California, BICO is
domiciled in the State of Delaware and CCIC is domiciled in the State of New
York. Each entity prepares its statutory financial statements in accordance with
accounting practices prescribed or permitted by the respective Departments of
Insurance ("DOI"). Prescribed statutory accounting practices include a variety
of publications of the National Association of Insurance Commissioners ("NAIC"),
as well as state laws, regulations and general administrative rules. Permitted
statutory accounting practices encompass all accounting practices not so
prescribed.
 
     CalComp's statutory policyholders' surplus as reported to regulatory
authorities was $204,330 and $223,964 at December 31, 1997, and 1996,
respectively. CalComp's statutory net income (loss), as reported to regulatory
authorities, was $(17,607), $17,642, and $30,087 for the years ended December
31, 1997, 1996 and 1995, respectively.
 
     BICO's statutory policyholders' surplus as reported to regulatory
authorities was $38,644 and $54,142 at December 31, 1997, and 1996,
respectively. BICO's statutory net income (loss), as reported to regulatory
authorities, was $(11,842), $1,180, and $(751) for the years ended December 31,
1997, 1996 and 1995, respectively.
 
     CBIC's statutory policyholders' surplus as reported to regulatory
authorities was $8,402 and $7,942 at December 31, 1997, and 1996, respectively.
CBIC's statutory net income, as reported to regulatory authorities, was $350,
$925 and $ 59 for the years ended December 31, 1997, 1996 and 1995 respectively.
 
     CCIC's statutory policyholders' surplus as reported to regulatory
authorities was $6,734 and $7,462 at December 31, 1997, and 1996, respectively.
CCIC's statutory net income (loss), as reported to regulatory authorities, was
$(918), $2,059, and $(2,286) for the years ended December 31, 1997, 1996 and
1995, respectively.
 
     Insurance companies are subject to insurance laws and regulations
established by the states in which they transact business. The laws of various
states establish supervisory agencies with broad administrative and supervisory
powers. Most states have also enacted legislation regulating insurance holding
company systems, including acquisitions, extraordinary dividends, the terms of
affiliate transactions, and other related matters. CalComp, CBIC, BICO and CCIC
have registered as holding company systems pursuant to such legislation in
California, Delaware and New York. The NAIC has formed committees and appointed
advisory groups to study and formulate regulatory proposals on such diverse
issues as the use of surplus debentures and accounting for reinsurance
transactions. It is not possible to predict the future impact of changing state
and federal regulation on the operations of insurance entities.
 
     The Risk Based Capital Model ("RBC") for property and casualty insurance
companies was adopted by the NAIC in December of 1993, and, starting in 1995,
companies were required to report their RBC ratios to the NAIC. CalComp, BICO,
CBIC and CCIC have calculated and met their RBC requirements.
 
     Insurance companies are also subject to restrictions affecting the amount
of stockholder dividends and advances that may be paid within any one year
without DOI prior approval. The California Insurance Code provides that the
maximum amount that may be paid as dividends on an annual non-cumulative basis
without prior notice to, or approval by, the DOI is the greater of (1) net
income for the preceding year or (2) 10% of statutory surplus as of the
preceding December 31. At December 31, 1997, CalComp and CBIC could pay
stockholder dividends in 1998 of $20,433 and $840, respectively. The Delaware
Insurance Code provides that an insurer may not declare or pay a dividend or
other distribution from any source other than earned surplus, without DOI prior
approval. At December 31, 1997, BICO had negative unassigned funds and as such,
cannot
 
                                      F-61
<PAGE>   197
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
declare and pay any stockholders dividends in 1998 without the prior approval of
the Delaware Commissioner of Insurance. The maximum amount of dividends which
can be paid by State of New York insurance companies to stockholders without
prior approval is subject to restrictions relating to statutory earned surplus.
CCIC's statutory surplus at December 31, 1997, was $6,734. At December 31, 1997,
CCIC had negative earned surplus and, as such, cannot declare and pay any
stockholders dividends in 1998 without the prior approval of the New York
Commissioner of Insurance. In May 1998, CCIC received a capital contribution of
$1,500 from BIG.
 
10. TRANSACTIONS WITH AFFILIATES
 
     ReviewCo. (a non-insurance subsidiary) paid stockholder dividends which
have been accounted for as capital contributions to BIG of $10,800, $1,750 and
$0 in 1997, 1996 and 1995, respectively. ReviewCo. also paid BIG $57 under an
Administrative Services Agreement effective in 1997.
 
     BIG's insurance subsidiaries entered into various agreements for Medical
Bill Review Services with ReviewCo. wherein the companies utilize the services
of ReviewCo. to provide managed care services and review of medical bills for
duplicate, unauthorized and excessive charges. The amounts paid to ReviewCo.
totaled $14,429, $12,263 and $6,010 in 1997, 1996 and 1995, respectively.
 
     CBIC entered into a Letter of Agreement by and on behalf of FHC and
ReviewCo., effective July 1, 1995, wherein CBIC and FHC provide network access
to their provider network to ReviewCo. in return for administrative services
performed by ReviewCo. The net amounts paid by ReviewCo. totaled $1,590, $701
and $247 in 1997, 1996 and 1995, respectively.
 
     Effective October 1, 1997, BIG entered into an Administrative Services
Agreement with FHS wherein FHS provides administrative and financial services to
BIG and its subsidiaries. The amount paid to FHS in 1997 totaled $2,146.
 
     CalComp entered into a Loan Agreement with Foundation Health Corporation
("FHC"), the Company's immediate parent and a wholly-owned subsidiary of FHS,
effective August 23, 1994, wherein it loaned FHC $10,000. The amounts paid for
interest by FHC to CalComp were $775, $774 and $777 in 1997, 1996 and 1995,
respectively.
 
     FHC made capital contributions of $35,000 and $2,422 to the Company in
1995.
 
     CalComp entered into an administrative services agreement with Foundation
Health, a California Health Plan ("FHCA"), and affiliate, effective September 1,
1994, wherein the company provides certain non-discretionary support services to
each other with regard to coverage issued under a jointly written Combined Care
program. This agreement was superseded by an administrative services agreement
between BIG, FHS and FHCA, effective October 1, 1997.
 
     BIG's insurance subsidiaries utilize the services of FIRMS to provide
claims adjusting and administration services on some of its policies. The
amounts paid to FIRMS totaled $512, $508 and $45 in 1997, 1996 and 1995,
respectively.
 
     BIG utilizes the services of Axis Integrated Resources, Inc. ("AXIS")
(formerly Claims Technical Services, Inc.), an affiliate, to provide temporary
employment services. The amounts paid to AXIS totaled $660, $149 and $242 in
1997, 1996 and 1995, respectively.
 
     Foundation Health Corporation made loans to BIG totaling $130,000 in May
($75,000) and August ($55,000) of 1996. The notes accrue interest at an annual
rate of 6.75% per annum. Interest paid on the notes
 
                                      F-62
<PAGE>   198
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
totaled $8,363 and $3,423 in 1997 and 1996, respectively. Principal payments
were made on the notes in the amounts of $1,750, $4,500 and $2,000 in June 1996,
February 1997 and June 1997, respectively. The balance of the two notes at
December 31, 1997 and 1996 were $121,750 and $128,250, respectively. Interest
payable on the notes at December 31, 1997 and 1996 was $870 and $907,
respectively. Effective January 1, 1998, the annual interest rate on the notes
was increased to 7.75%.
 
     CalComp purchased four health care centers and land from Foundation Health
Medical Services ("FHMS") for $31,114 in 1995. Subsequent to the purchase, as of
September 29, 1995, CalComp leased the care centers to Foundation Health Medical
Group. Rental income earned on these properties from affiliates at December 31,
1997, 1996 and 1995 was $0, $2,773, and $755, respectively. In November 1996, in
conjunction with the sale of FHC's physician practices and medical management
company to FPA Medical Management, Inc. ("FPA"), an unaffiliated company, three
properties previously leased to FHC were leased to FPA.
 
11. EMPLOYEE BENEFIT PLANS
 
     The Company's employees participated in the FHC 401(k) Plan (the "Plan"), a
qualified plan under Sections 401(a) and 401(k) of the Internal Revenue Code,
until August 31, 1997. Effective September 1, 1997, the FHC Plan was merged into
the FHS 401(k) Plan. Substantially all of the Company's employees are eligible
to participate in the Plan. Under the Plan, the Company makes matching
contributions equal to 50% of a participant's salary deferral up to a maximum of
6%, which is equal to a maximum of 3% of each participating employee's
compensation. The Company's contribution to the Plan totaled $929, $742 and $608
for the years ended December 31, 1997, 1996 and 1995, respectively.
 
     Certain members of management and highly compensated employees participate
in a deferred compensation plan which allows the participants to defer payment
of up to 90% of their compensation. In connection with the FHC and Health
Systems International, Inc. 1997 merger, the plan was frozen in May 1997, at
which time each participant's account was credited with three times the 1996
Company match (or a lesser amount for certain prior participants) and each
participant became 100% vested in all such contributions. The current provisions
with respect to the form and timing of payments under the plan remain unchanged.
The Company's expense relating to these benefits totaled $795, $652 and $605 for
the years ended December 31, 1997, 1996 and 1995, respectively.
 
12. COMMITMENTS
 
     The Company is obligated under several non-cancellable operating leases for
office facilities and certain equipment. These leases contain rent adjustment
provisions to compensate the lessor for increases in operating costs.
 
     Future minimum lease payments under the operating leases are as follows:
 
<TABLE>
<S>                                                          <C>
1998.......................................................  $ 8,874
1999.......................................................    7,245
2000.......................................................    6,392
2001.......................................................    5,299
2002.......................................................    1,591
Thereafter.................................................    1,675
                                                             -------
          Total minimum lease payments.....................  $31,076
                                                             =======
</TABLE>
 
                                      F-63
<PAGE>   199
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
               NOTES TO COMBINED FINANCIAL STATEMENTS (CONTINUED)
                  YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                             (DOLLARS IN THOUSANDS)
 
     Rental expenses totaled approximately $8,696, $8,389, and $7,333 for the
years ended December 31, 1997, 1996 and 1995 respectively.
 
13. LITIGATION
 
     In the ordinary course of its business, the Company is a party to claims
and legal actions. The Company also undergoes regulatory audits with respect to
operations. After consulting with legal counsel, management is of the opinion
that any liability that may ultimately be incurred as a result of these claims,
legal actions or audits will not have a material adverse effect on the financial
position or results of operations of the Company.
 
14. PREPAID EXPENSES AND OTHER ASSETS
 
     A summary of prepaid and other assets at December 31 is as follows:
 
<TABLE>
<CAPTION>
                                                          1997         1996
                                                         -------      -------
<S>                                                      <C>          <C>
Deposits...............................................  $ 1,652      $ 1,193
Notes receivable.......................................    1,258           --
Prepaid expenses.......................................      681        1,448
Other..................................................    1,782           19
                                                         -------      -------
          Total........................................  $ 5,373      $ 2,660
                                                         =======      =======
</TABLE>
 
15. ACCOUNTS PAYABLE AND OTHER LIABILITIES
 
     A summary of accounts payable and other liabilities at December 31 is as
follows:
 
<TABLE>
<CAPTION>
                                                          1997         1996
                                                         -------      -------
<S>                                                      <C>          <C>
Premium taxes, regulatory and assessment fees..........  $ 8,905      $ 9,172
Payables to affiliates.................................   10,443        3,019
Accrued expenses and other payables....................   10,562        6,617
Payable for investments................................   10,430        3,049
Salary and related expenses............................    3,503        2,306
                                                         -------      -------
          Total........................................  $43,843      $24,163
                                                         =======      =======
</TABLE>
 
                                      F-64
<PAGE>   200
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
                       CONDENSED COMBINED BALANCE SHEETS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                               MARCH 31,     DECEMBER 31,
                                                                 1998            1997
                                                              -----------    ------------
                                                              (UNAUDITED)
<S>                                                           <C>            <C>
ASSETS
INVESTMENTS:
Fixed maturities:
  Available for sale........................................  $  656,829      $  611,163
  Held to maturity..........................................      14,020          14,059
Real estate.................................................      29,658          29,821
Promissory note.............................................      10,000          10,000
Short-term investments......................................      96,649          68,558
                                                              ----------      ----------
          TOTAL INVESTMENTS.................................     807,156         733,601
Cash and cash equivalents...................................     (15,330)         29,570
Reinsurance receivable......................................     216,101         229,521
Premiums receivable.........................................      91,592          94,944
Less: Allowance.............................................     (15,686)        (14,936)
Earned but unbilled premiums................................      22,155          24,401
Accrued investment income...................................      11,092          10,605
Deferred policy acquisition costs...........................      24,681          23,841
Property & equipment, net...................................      15,557          14,556
Goodwill and other intangible assets, net...................      13,951          14,266
Deferred income taxes.......................................      17,793          15,807
Income taxes receivable.....................................      10,506          40,857
Other assets................................................       5,454           5,373
                                                              ----------      ----------
          TOTAL ASSETS......................................  $1,205,022      $1,222,406
                                                              ==========      ==========
LIABILITIES AND STOCKHOLDER'S EQUITY
LIABILITIES
Reserves for losses and loss expenses.......................  $  713,473      $  728,421
Unearned premium reserve....................................      49,469          45,004
Notes payable...............................................     121,750         121,750
Reinsurance payable.........................................      24,571          28,027
Accrued expenses and accounts payable.......................      30,307          30,900
Accrued dividends to policyholders..........................       2,823           3,015
Other liabilities...........................................      15,608          12,943
                                                              ----------      ----------
          TOTAL LIABILITIES.................................     958,001         970,060
STOCKHOLDER'S EQUITY:
Common stock and Invested capital...........................     167,416         167,416
Retained earnings...........................................      75,879          80,060
Unrealized investment holding gains (losses)................       3,726           4,870
                                                              ----------      ----------
          TOTAL STOCKHOLDER'S EQUITY........................     247,021         252,346
                                                              ==========      ==========
          TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY........  $1,205,022      $1,222,406
                                                              ==========      ==========
</TABLE>
 
                                      F-65
<PAGE>   201
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                   CONDENSED COMBINED STATEMENT OF OPERATIONS
                   THREE MONTHS ENDED MARCH 31, 1998 AND 1997
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                  THREE MONTHS ENDED
                                                                      MARCH 31,
                                                              --------------------------
                                                                 1998           1997
                                                              (UNAUDITED)    (UNAUDITED)
<S>                                                           <C>            <C>
REVENUES:
  Gross premiums earned.....................................   $146,512       $158,473
  Ceded premiums earned.....................................     (6,900)       (37,085)
                                                               --------       --------
          Net premiums earned...............................    139,612        121,388
  Net investment income.....................................      9,627          9,574
  Realized capital gains....................................        226             --
  Other income..............................................        166            853
                                                               --------       --------
          TOTAL REVENUE.....................................    149,631        131,815
EXPENSES:
  Losses and loss adjustment expenses incurred..............    114,286         83,967
  Other underwriting expenses...............................     39,055         31,406
  Dividends to policyholders................................        120             --
  Depreciation..............................................        883            699
  Amortization..............................................        309             68
  Interest expense..........................................      2,359          2,128
  Administrative expense....................................      2,194             --
                                                               --------       --------
          TOTAL COSTS AND EXPENSES..........................    159,206        118,268
INCOME BEFORE INCOME TAXES..................................     (9,575)        13,547
Provision for federal income tax expense....................     (5,394)         2,746
                                                               --------       --------
          NET INCOME........................................   $ (4,181)      $ 10,801
                                                               ========       ========
RATIOS TO NET PREMIUMS EARNED:
  Losses and loss adjustment expenses incurred..............       81.9%          69.2%
  Other underwriting expenses...............................       28.0%          25.9%
  Dividends to policyholders................................        0.1%           0.0%
  Depreciation..............................................        0.6%           0.6%
                                                               --------       --------
                                                                  110.6%          95.7%
                                                               ========       ========
</TABLE>
 
                                      F-66
<PAGE>   202
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
        CONDENSED COMBINED STATEMENT OF CHANGES IN STOCKHOLDER'S EQUITY
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                              NET
                                                           UNREALIZED                            TOTAL
                                                           GAIN(LOSS)                        STOCKHOLDER'S
                                                         ON INVESTMENTS   INVESTED CAPITAL      EQUITY
<S>                                                      <C>              <C>                <C>
Balance as at December 31, 1996........................       1,799            266,093          267,892
Net income (loss)......................................                        (29,417)         (29,417)
Capital contributions..................................                         10,800           10,800
Unrealized gain on available for sale investments, net
  of deferred taxes....................................       3,071                               3,071
                                                            -------           --------         --------
Balance as at December 1997............................     $ 4,870           $247,476         $252,346
                                                            -------           --------         --------
Net income (loss)......................................                         (4,181)          (4,181)
Unrealized gain (loss) on available for sale
  investments, net of deferred taxes...................      (1,144)                             (1,144)
                                                            -------           --------         --------
Balance as at March 31, 1998...........................     $ 3,726           $243,295         $247,021
                                                            =======           ========         ========
</TABLE>
 
                                      F-67
<PAGE>   203
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                  CONDENSED COMBINED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED MARCH 31,
                                                              ----------------------------
                                                                 1998              1997
                                                              ----------        ----------
<S>                                                           <C>               <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss).........................................   $ (4,181)         $ 10,801
  Adjustments to reconcile net income to net cash provided
     by (used in) operating activities:
     Amortization of bonds..................................      1,189             1,035
     Depreciation on real estate............................        163               149
     Depreciation on property, plant & equipment............        883               699
     Loss (gain) on sale of investments.....................       (226)               --
     Amortization of goodwill and intangible assets.........        315               193
     (Increase) decrease in reinsurance recoverables........      9,288           (22,398)
     (Increase) decrease in premiums receivable.............      4,102             1,315
     (Increase) decrease in earned but unbilled
      receivables...........................................      2,246             1,795
     (Increase) decrease in accrued investment income.......       (487)            1,367
     (Increase) decrease in receivable from insurer.........      4,132                --
     (Increase) decrease in deferred policy acquisition
      costs.................................................       (840)           (3,618)
     (Increase) decrease in income taxes receivable.........     30,351              (576)
     (Increase) decrease in prepaid reinsurance premiums....         --             7,328
     (Increase) decrease in deferred income taxes...........     (1,354)              989
     (Increase) decrease in prepaid and other assets........        (81)              561
     (Increase) decrease in loss and loss adjustment
      expenses..............................................    (14,948)           21,467
     (Increase) decrease in unearned premium reserves.......      4,465             5,451
     (Increase) decrease in reinsurance payable.............     (3,456)           (2,228)
     (Increase) decrease in policyholder dividend payable...       (192)               --
     (Increase) decrease in accounts payable and other
      liabilities...........................................      2,072            (4,331)
                                                               --------          --------
          Total adjustments.................................     37,622             9,198
                                                               --------          --------
          Net cash provided by (used in) operating
            activities......................................     33,441            19,999
                                                               --------          --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of bonds available for sale.....................    (89,024)          (39,887)
  Sales of bonds available for sale.........................     40,620            23,314
  Maturities of bonds:
     Bonds held to maturity.................................         39                40
  Purchases of property, plant & equipment..................     (1,884)             (379)
  Purchases of real estate..................................          0            (1,287)
                                                               --------          --------
          Net cash provided by (used in) investing
            activities......................................    (50,249)          (18,199)
                                                               --------          --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Principal payments on long-term debt......................         --            (4,500)
  Capital contributions.....................................         --             4,500
                                                               --------          --------
          Net cash provided by (used in) financing
            activities......................................         --                --
                                                               --------          --------
Net Increase (Decrease) in Cash and Cash Equivalents........    (16,808)            1,800
Cash and Cash Equivalents at Beginning of Quarter...........     98,128            25,861
                                                               --------          --------
Cash and Cash Equivalents at End of Quarter.................   $ 81,320          $ 27,661
                                                               ========          ========
</TABLE>
 
                                      F-68
<PAGE>   204
 
                          THE INSURANCE OPERATIONS OF
                         BUSINESS INSURANCE GROUP, INC.
 
                NOTES TO CONDENSED COMBINED FINANCIAL STATEMENTS
                   THREE MONTHS ENDED MARCH 31, 1998 AND 1997
                                  (UNAUDITED)
 
NOTES A.1 SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES AND BASIS OF PRESENTATION
 
     Business Insurance Group, Inc. ("BIG"), is an insurance holding company and
ultimately a wholly owned subsidiary of Foundation Health Systems, Inc. ("FHS").
BIG serves as the immediate parent company for four workers' compensation
insurance subsidiary companies, as well as certain non-insurance entities. On
May 5, 1998, FHS entered into a definitive agreement to sell BIG and its four
insurance subsidiaries [California Compensation Insurance Company ("CalComp"),
Business Insurance Company ("BICO"), Combined Benefits Insurance Company
("CBIC"), and Commercial Compensation Insurance Company ("CCIC")] to Superior
Insurance Group, Inc. ("Superior") of Calabasas, California. The transaction,
subject to customary closing conditions including regulatory approvals and a
favorable vote from Superior's shareholders, is expected to close in the fourth
quarter of 1998.
 
     The accompanying combined financial statements include the accounts of BIG
and its insurance subsidiaries, CalComp, BICO, CBIC and CCIC. BIG is also the
parent company of Foundation Integrated Risk Management Solutions, Inc.
("FIRMS"), which is a workers' compensation risk management and third party
claims administrator, and Foundation Health Medical Resources Management
("ReviewCo."), which provides bill review, access to provider networks and other
managed care service for workers' compensation carriers and third party
administrators. FIRMS and ReviewCo. are not included in the sale to Superior.
Therefore, for the purposes of this report, the operations, assets and
liabilities of these non-insurance subsidiaries are not included in the
accompanying financial statements. Also, under the terms of the agreement with
Superior, certain assets and liabilities (including the note from parent,
long-term debt due to parent and other intercompany balances), will be settled
at or prior to the closing of the transaction. In addition, investment real
estate will be purchased by FHS at book value prior to or at the closing date of
the transaction.
 
NOTE A.2 LOSSES AND LOSS ADJUSTMENT EXPENSES ("LAE")
 
     Losses and LAE are estimates on case-basis amounts of reported claims and
unreported losses and loss adjustment expenses based on experience and industry
data. The provision for unpaid losses and loss adjustment expenses, net of
estimated salvage and subrogation, has been established to cover the estimated
net cost of incurred claims. The amounts are necessarily based on estimates, and
accordingly, there can be no assurance the ultimate liability will not differ
from such estimates.
 
                                      F-69
<PAGE>   205
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
Superior National Insurance Group, Inc.:
 
We have audited the accompanying consolidated balance sheets of Pac Rim Holding
Corporation and subsidiaries as of December 31, 1996 (as restated -- see Note 2)
and 1995, and the related consolidated statements of operations, stockholders'
equity, and cash flows for each of the years in the three-year period ended
December 31, 1996 (restated as to 1996 -- see Note 2). These consolidated
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these consolidated financial
statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audits to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Pac Rim Holding
Corporation and subsidiaries as of December 31, 1996 and 1995, and the results
of their operations and their cash flows for each of the years in the three-year
period ended December 31, 1996 in conformity with generally accepted accounting
principles.
 
                                          KPMG Peat Marwick, LLP
 
Los Angeles, California
August 28, 1997
 
                                      F-70
<PAGE>   206
 
                  PAC RIM HOLDING CORPORATION AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
            (AMOUNTS IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              ----------------------
                                                                 1996         1995
                                                              ----------    --------
                                                              (RESTATED)
<S>                                                           <C>           <C>
Investments:
  Bonds, available-for-sale at fair value (amortized cost
     $55,245 and $119,314)..................................   $ 54,759     $121,771
  Short-term investments (at cost, which approximates fair
     value).................................................     56,794        7,260
                                                               --------     --------
          Total investments.................................    111,553      129,031
Cash........................................................      1,731          773
Reinsurance recoverable on outstanding losses...............      3,124        3,884
Reinsurance receivable on paid losses.......................        785          184
Premiums receivable, less allowance for doubtful accounts of
  $2,516 (Restated) and $1,221..............................     14,278       11,616
Earned but unbilled premiums................................      4,142        4,880
Investment income receivable................................        609        2,207
Deferred policy acquisition costs...........................      1,065          974
Property and equipment, less accumulated depreciation and
  amortization of $4,978 and $3,803.........................      4,411        2,434
Unamortized debenture issue costs...........................      1,063        1,468
Federal income taxes recoverable............................         --        1,456
Deferred federal income taxes, net..........................      8,745        8,348
Prepaid reinsurance premiums................................        198          227
Other assets................................................      3,731        1,569
                                                               --------     --------
          Total Assets......................................   $155,435     $169,051
                                                               ========     ========
                        LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities:
Reserve for losses and loss adjustment expenses.............   $100,588     $ 96,525
Convertible debentures payable, less unamortized discount of
  $1,059 and $1,393.........................................     18,941       18,607
Unearned premiums...........................................      6,917        5,715
Reserve for policyholder dividends..........................        364          381
Obligation under capital lease..............................      1,203           --
Accrued expenses and accounts payable.......................      8,148        3,668
                                                               --------     --------
          Total Liabilities.................................    136,161      124,896
Commitments and contingencies
Stockholders' Equity:
  Preferred Stock:
     $.01 par value -- shares authorized 500,000; none
      issued and outstanding................................         --           --
  Common Stock:
     $.01 par value -- shares authorized 35,000,000 issued
      and outstanding 9,528,200.............................         95           95
Additional paid-in capital..................................     29,624       29,624
Warrants....................................................      1,800        1,800
Unrealized gain (loss) on available-for-sale securities,
  net.......................................................       (324)       1,622
Retained earnings (deficit).................................    (11,921)      11,014
                                                               --------     --------
Net Stockholders' Equity....................................     19,274       44,155
                                                               --------     --------
          Total Liabilities and Stockholders' Equity........   $155,435     $169,051
                                                               ========     ========
</TABLE>
 
                See notes to consolidated financial statements.
                                      F-71
<PAGE>   207
 
                  PAC RIM HOLDING CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                 (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31,
                                                             --------------------------------
                                                                1996        1995       1994
                                                             ----------    -------    -------
                                                             (RESTATED)
<S>                                                          <C>           <C>        <C>
REVENUES:
  Net premiums earned......................................   $ 82,654     $76,016    $92,894
  Net investment income....................................      7,013       8,089      6,514
  Realized capital gains...................................      1,640         453         --
  A&H commission income....................................          8          --         --
                                                              --------     -------    -------
          Total revenue....................................     91,315      84,558     99,408
COSTS AND EXPENSES:
  Losses and loss adjustment expenses......................     79,890      50,957     63,788
  Amortization of policy acquisition costs -- net..........     14,672      18,647     19,565
  Administrative, general, and other.......................     16,752      11,662     11,927
  Policyholder dividends...................................        (11)        132      1,301
  Interest expense.........................................      2,341       2,306        857
                                                              --------     -------    -------
          Total costs and expenses.........................    113,644      83,704     97,438
                                                              --------     -------    -------
Income (loss) before income taxes..........................    (22,329)        854      1,970
Income tax expense.........................................        606         279        812
                                                              --------     -------    -------
NET INCOME (LOSS)..........................................   $(22,935)    $   575    $ 1,158
                                                              ========     =======    =======
PER SHARE DATA:
  NET INCOME (LOSS) PRIMARY AND FULLY DILUTED..............   $  (2.41)    $   .06    $  0.12
                                                              ========     =======    =======
</TABLE>
 
                See notes to consolidated financial statements.
                                      F-72
<PAGE>   208
 
                  PAC RIM HOLDING CORPORATION AND SUBSIDIARIES
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
              (AMOUNTS IN THOUSANDS, EXCEPT FOR NUMBER OF SHARES)
 
<TABLE>
<CAPTION>
                                                                                  UNREALIZED
                                                                                  GAIN (LOSS)
                                        COMMON STOCK                                  ON
                                     ------------------                           AVAILABLE-
                                      NUMBER              ADDITIONAL               FOR-SALE     RETAINED
                                        OF                 PAID-IN                SECURITIES,   EARNINGS
                                      SHARES     AMOUNT    CAPITAL     WARRANTS       NET       (DEFICIT)    TOTAL
                                     ---------   ------   ----------   --------   -----------   ---------   -------
<S>                                  <C>         <C>      <C>          <C>        <C>           <C>         <C>
Balance at January 1, 1994.........  9,528,200    $95      $29,624          --           --     $  9,281    $39,000
Unrealized gain on
  available-for-sale securities at
  January 1, 1994, net.............         --     --           --          --      $    96           --         96
Additional paid in
  capital-warrants.................         --     --           --      $1,800           --           --      1,800
Net income.........................         --     --           --          --           --        1,158      1,158
Change in unrealized loss of
  available-for-sale securities,
  net..............................         --     --           --          --       (4,877)          --     (4,877)
                                     ---------    ---      -------      ------      -------     --------    -------
Balance at December 31, 1994.......  9,528,200     95       29,624       1,800       (4,781)      10,439     37,177
                                     ---------    ---      -------      ------      -------     --------    -------
  Net income.......................         --     --           --          --           --          575        575
  Change in unrealized gain of
    available-for-sale securities,
    net............................         --     --           --          --        6,403           --      6,403
                                     ---------    ---      -------      ------      -------     --------    -------
Balance at December 31, 1995.......  9,528,200     95       29,624       1,800        1,622       11,014     44,155
                                     ---------    ---      -------      ------      -------     --------    -------
Net loss (Restated)................         --     --           --          --           --      (22,935)   (22,935)
Change in unrealized loss of
  available-for-sale securities,
  net..............................         --     --           --          --       (1,946)          --     (1,946)
                                     ---------    ---      -------      ------      -------     --------    -------
Balance at December 31, 1996,
  (Restated).......................  9,528,200    $95      $29,624      $1,800      $  (324)    $(11,921)   $19,274
                                     =========    ===      =======      ======      =======     ========    =======
</TABLE>
 
                See notes to consolidated financial statements.
                                      F-73
<PAGE>   209
 
                  PAC RIM HOLDING CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (AMOUNTS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31,
                                                              ---------------------------------
                                                                 1996         1995       1994
                                                              ----------    --------    -------
                                                              (RESTATED)
<S>                                                           <C>           <C>         <C>
OPERATING ACTIVITIES
  Net Income (loss).........................................   $(22,935)    $    575    $ 1,158
  Adjustments to reconcile net income (loss) to net cash
     provided (used) by operating activities:
     Depreciation and amortization..........................       2,001       1,421        930
     Provision for losses on premiums receivable............       1,295         150       (143)
     Provision for deferred income taxes....................         606       1,340      1,188
     Realized capital gains.................................     (1,640)        (453)        --
     Changes in:
       Reserve for losses and loss adjustment expenses......       4,063     (20,104)   (19,336)
       Unearned premiums....................................       1,202      (4,202)     1,655
       Reserve for policyholder dividends...................        (17)        (609)    (1,539)
       Ceded reinsurance payable............................          --          --       (252)
       Premiums receivable..................................     (3,219)         255      5,413
       Reinsurance recoverable..............................         159      (1,936)    13,044
       Aggregate excess of loss reinsurance recoverable.....          --          --     10,812
       Prepaid reinsurance premiums.........................          29         153      2,435
       Deferred policy acquisition costs....................        (91)       1,111       (953)
       Income taxes recoverable.............................       1,456      (1,013)     1,916
       Accrued expenses and accounts payable................       4,466         116        319
       Investment income receivable.........................       1,598         148     (1,372)
       Other assets.........................................     (2,162)         229        630
                                                              ----------    --------    -------
          NET CASH PROVIDED (USED) BY OPERATING
            ACTIVITIES......................................    (13,189)     (22,819)    15,905
                                                              ----------    --------    -------
INVESTING ACTIVITIES
  Purchase of investments -- bonds..........................    (47,622)     (40,524)   (67,788)
  Sales of investments -- bonds.............................     104,172      61,343         --
  Maturity and calls of investments -- bonds................       9,080       1,028      7,228
  Additions to property and equipment.......................     (1,949)        (836)      (918)
                                                              ----------    --------    -------
     NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES.......      63,681      21,011    (61,478)
                                                              ----------    --------    -------
FINANCING ACTIVITIES
  Proceeds from issuance of convertible debentures..........          --          --     20,000
  Debenture issuance costs..................................          --          --     (2,025)
                                                              ----------    --------    -------
     NET CASH PROVIDED BY FINANCING ACTIVITIES..............          --          --     17,975
                                                              ----------    --------    -------
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS............      50,492      (1,808)   (27,598)
Cash and cash equivalents at beginning of period............       8,033       9,841     37,439
                                                              ----------    --------    -------
     CASH AND CASH EQUIVALENTS AT END OF PERIOD.............     $58,525    $  8,033    $ 9,841
                                                              ==========    ========    =======
SUPPLEMENTAL DISCLOSURE:
  Interest paid.............................................      $1,600    $  1,615    $   -0-
                                                              ==========    ========    =======
  Income taxes paid.........................................        $-0-    $     37    $   -0-
                                                              ==========    ========    =======
</TABLE>
 
     The Company entered into a capital lease during 1996, to acquire certain
operating system hardware and software; the lease obligation at December 31,
1996 was $1,203,000.
 
                See notes to consolidated financial statements.
                                      F-74
<PAGE>   210
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                  PAC RIM HOLDING CORPORATION AND SUBSIDIARIES
                               DECEMBER 31, 1996
                                   (RESTATED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Organization: Pac Rim Holding Corporation ("Pac Rim Holding") is a holding
company that was incorporated in 1987 in Delaware. The accompanying consolidated
financial statements include the accounts and operations of the holding company
and its subsidiary, The Pacific Rim Assurance Company ("Pacific Rim Assurance")
and its subsidiary, Regional Benefits Insurance Services, Inc., (collectively
referred to herein as "the Company"). All significant intercompany transactions
and balances are eliminated in consolidation. Pacific Rim Assurance is engaged
exclusively in the business of writing workers' compensation insurance in
California, Arizona, Georgia, Alabama and Texas. Regional Benefits Insurance,
Inc. ("RBIS") is an insurance agency.
 
     Sale of Pac Rim Holding: The previously announced acquisition of Pac Rim
Holding by Superior National Insurance Group, Inc. ("SNTL") was completed on
April 11, 1997. Pac Rim Holding was acquired for aggregate consideration of $42
million in cash. The $42 million payment by SNTL resulted in the payment of
approximately $20 million ($2.105 per share) to Pac Rim Holding's common
stockholders, $20 million to Pac Rim Holding's convertible debenture holders,
and $2 million to Pac Rim Holding's warrant and option holders.
 
     Accounting Principles: The accompanying consolidated financial statements
are presented on the basis of generally accepted accounting principles ("GAAP"),
which differ in some respects from prescribed and permitted statutory accounting
practices followed in reports to the Insurance Departments. Prescribed statutory
accounting practices include a variety of publications of the National
Association of Insurance Commissioners, as well as state laws, regulations, and
general administrative rules. Permitted statutory accounting practices encompass
all accounting practices not so prescribed. The principal differences relate to
the non-admission of certain assets, examples are, deferred income taxes,
deferred policy acquisition costs, earned but unbilled premiums, premiums
receivable, and software.
 
     Earned Premiums: Earned premiums and the liability for unearned premiums
are calculated by formula such that the premium written is earned pro rata over
the term of the policy. The insurance policies currently written by the Company
are for a period of one year or less. Premiums earned include an estimate for
earned but unbilled premiums.
 
     Reserve for Losses and Loss Adjustment Expenses: The reserve for losses and
loss adjustment expenses ("LAE") is based on the accumulation of cost estimates
for each loss reported prior to the close of the accounting periods and
provision for the probable cost of losses that have occurred but have not yet
been reported. The Company does not discount such reserves for financial
reporting purposes. The methods for making such estimates and for establishing
the resulting liabilities are continually reviewed and updated and any
adjustments resulting therefrom are included in current operations when
determined. While the ultimate amount of losses incurred and the related expense
is dependent on future developments, management is of the opinion that, given
the inherent variability in any such estimates, the reserve for unpaid losses,
and LAE is within a reasonable range of adequacy.
 
     Policy Acquisition Costs: Policy acquisition costs, such as commissions,
premium taxes, and other underwriting costs related to the production and
retention of business, are deferred and amortized as the related premiums are
earned. Anticipated investment income is considered in determining the
recoverability of this asset. Other policy acquisition costs that do not vary
with the production of new business are expensed when incurred and are included
in administrative, general, and other expenses.
 
     Policyholder Dividends: Certain policies written by the Company are
eligible for policyholder dividends. An estimated provision for policyholder
dividends is accrued as the related premiums are earned. Such
                                      F-75
<PAGE>   211
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
dividends do not become a legal liability of Pacific Rim Assurance unless, and
until, declared by the board of directors.
 
     Investments: The Company has designated all of its portfolio as
"available-for-sale" and accordingly, bonds are carried at market with the
unrealized gain (loss) reflected in equity, net of the applicable income taxes.
The cost of investments sold is determined by specific identification.
 
     Property and Equipment: Property and equipment is stated at cost.
Depreciation of property and equipment is computed using the straight-line
method over an estimated useful life of five years for financial reporting
purposes. Leasehold improvements are amortized on the straight-line method over
the life of the lease.
 
     Taxes: The Company recognizes deferred tax assets and liabilities based on
the expected future tax consequences of existing differences between financial
reporting and tax reporting bases of assets and liabilities and operating loss
and tax credit carry forwards for tax purposes. The insurance subsidiary pays
premium taxes on gross premiums written in California in lieu of state income
taxes.
 
     Cash and Cash Equivalents: For purposes of the statements of cash flows,
certificates of deposit and short-term investments with an original maturity of
three months or less, at date of purchase, are considered to be cash
equivalents.
 
     Stockholders' Equity: The issuance of the convertible debentures included
issuing detachable warrants to purchase common stock (See Note 6). The value of
these warrants was $1,800,000, which was recorded as warrants in the
Consolidated Balance Sheets.
 
     Earnings Per Share: Net income (loss) per share is computed on the basis of
the weighted average shares of common stock, plus common stock equivalent shares
arising from the effect of the stock options, warrants, and convertible
debentures to the extent they are dilutive. (See Notes 6 and 7). The number of
shares used in the computation of primary and fully diluted earnings per share
for the years ended December 31, 1996, 1995 and 1994 was 9,528,200.
 
     New Accounting Standards: In October 1995, FASB issued Statement No. 123,
"Accounting For Stock-Based Compensation" which established a fair value based
method of accounting for stock-based compensation plans. This statement is
effective for financial statements with fiscal years beginning after December
15, 1995. The Company elected to continue accounting for stock-based
compensation based on Accounting Principles Board (APB) No. 25; and thus, the
Company adopted only the disclosure provision of FASB Statement No. 123.
 
     Fair Values of Financial Instruments: The carrying amounts of financial
instruments, other than investment securities, approximate their fair values.
For investment securities, the fair values for fixed maturity securities are
based on quoted market prices. The carrying amounts and fair values for all
investment securities are disclosed in Note 3.
 
     Reclassifications: Certain prior year amounts in the accompanying financial
statements have been reclassified to conform with the 1996 presentation.
 
                                      F-76
<PAGE>   212
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
NOTE 2 -- RESTATEMENT OF 1996 FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                        NET
                                                                   STOCKHOLDERS'
                                                       NET LOSS       EQUITY
                                                       --------    -------------
                                                        (AMOUNTS IN THOUSANDS)
<S>                                                    <C>         <C>
As originally stated at December 31, 1996............  $(15,900)      $26,309
Change in EBUB.......................................    (3,385)       (3,385)
Change in allowance for doubtful accounts............    (1,460)       (1,460)
Write-off of deferred merger expenses................      (479)         (479)
Additional accrued expenses and accounts payable.....    (1,278)       (1,278)
Write-off of gain contingencies......................      (433)         (433)
                                                       --------       -------
As restated at December 31, 1996.....................  $(22,935)      $19,274
                                                       ========       =======
</TABLE>
 
     Earned But Unbilled Premiums: Earned but unbilled premiums ("EBUB")
represent management's estimate of future additional or return premiums
generated by interim and final audits of payroll and rate classification data
associated with the Company's expired and inforce workers' compensation
policies. EBUB is generally based upon estimated and actual payrolls and rates
provided by policyholders, and historical billing patterns adjusted for changes
in regulations, pricing, and billing practices and procedures. The Company's
former management recorded $7.9 million in EBUB at December 31, 1996.
 
     Current management attempted to reconcile its estimates with that of prior
management's recorded EBUB, and found prior management's methodology to be
fundamentally flawed. In light of the flawed methodology used by prior
management, current management reduced EBUB by $3.385 million.
 
     Premiums receivable:  At December 31, 1996, the Company had recorded
premiums receivable of $15.7 million, net of an allowance of doubtful accounts
of $1.1 million. Further, included in the $15.7 million premiums receivable, net
of the allowance for doubtful accounts were $1.6 million in premiums receivable
that had been turned over to an attorney for collection.
 
     Based upon information contained in the December 31, 1996, 10-(K) and other
sources available to prior management, it was apparent to current management
that an additional allowance was required.
 
     Deferred merger expenses:  GAAP provides that certain costs related to an
acquisition of another company may be deferred by the acquiring Company. Costs
related to the acquisition of the company being acquired may not be deferred.
Pac Rim Holdings at December 31, 1996, had improperly deferred $0.479 million in
legal and investment banking costs related to its acquisition by SNTL.
 
     Accrued expenses and accounts payable:  At December 31, 1996, former
management estimated it had unpaid liabilities of $7.3 million. The current
management identified an additional $1.278 million in accrued liabilities and
accounts payable relating to legal, commissions, and miscellaneous general and
administrative expenses that were substantially known at year-end.
 
     Gain contingencies:  GAAP does not provide for the recognition of a gain
prior to its realization. At December 31, 1996, the Company recorded $433,000 in
such contingent gains. These gains related to anticipated legal actions that had
not gone to trial or had not been settled at December 31, 1996. Therefore, in
accordance with GAAP these contingent gains were eliminated from the
Consolidated Statements of Operations.
 
                                      F-77
<PAGE>   213
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
NOTE 3 -- INVESTMENTS
 
     Major categories of investment income, net of investment expenses, for
1996, 1995 and 1994 are summarized as follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                                                    YEAR ENDED DECEMBER 31,
                                                   --------------------------
                                                    1996      1995      1994
                                                   ------    ------    ------
<S>                                                <C>       <C>       <C>
Investment Income:
  U.S. Treasury and Other Governmental Agency
     Securities..................................  $4,065    $5,365    $5,508
  Money Market Funds.............................     418       309       291
  Funds Held by Reinsurer........................      --        --       169
  Corporate Bonds................................   2,762     2,655       700
  Tax-Exempt Bonds...............................      --         4       102
  Certificates of Deposit........................      31        22         9
                                                   ------    ------    ------
  Investment Income..............................   7,276     8,355     6,779
  Less: Investment Expenses......................     263       266       265
                                                   ------    ------    ------
Net Investment Income............................  $7,013    $8,089    $6,514
                                                   ======    ======    ======
</TABLE>
 
     Proceeds from the sales of investments in bonds during 1996 were
$104,172,000; gross gains of $1,888,000 and gross losses of $248,000 were
realized on those sales. Proceeds from the sales of investments in bonds during
1995 were $61,343,000; gross gains of $657,000 and gross losses of $204,000 were
realized on those sales. There were no sales of investments in bonds during
1994.
 
     The amortized cost and fair values of investments in debt securities are
summarized as follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                                                         GROSS         GROSS
                                          AMORTIZED    UNREALIZED    UNREALIZED      FAIR
                                            COST         GAINS        (LOSSES)      VALUE
                                          ---------    ----------    ----------    --------
<S>                                       <C>          <C>           <C>           <C>
1996
U.S. Treasury and other governmental      $ 28,808       $    5        $(184)      $ 28,629
  agencies..............................
Corporates..............................    13,765            2         (204)        13,563
U.S. agencies...........................    12,341            8         (118)        12,231
Asset backed............................       331            5           --            336
                                          --------       ------        -----       --------
          Total.........................  $ 55,245       $   20        $(506)      $ 54,759
                                          ========       ======        =====       ========
1995
U.S. Treasury and other governmental      $ 68,963       $   17        $(157)      $ 68,823
  agencies..............................
Corporates..............................    33,793        1,886           --         35,679
U.S. agencies...........................    10,546          418           --         10,964
Asset backed............................     6,012          293           --          6,305
                                          --------       ------        -----       --------
          Total.........................  $119,314       $2,614        $(157)      $121,771
                                          ========       ======        =====       ========
</TABLE>
 
                                      F-78
<PAGE>   214
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     The amortized cost and fair value of debt securities at December 31, 1996,
by contractual maturity are summarized as follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                                                          AMORTIZED     FAIR
                                                            COST        VALUE
                                                          ---------    -------
    <S>                                                   <C>          <C>
    Due in 1997.......................................     $10,701     $10,696
    Due 1998 - 2001...................................      44,544      44,063
                                                           -------     -------
                                                           $55,245     $54,759
                                                           =======     =======
</TABLE>
 
     The expected maturities will differ from contractual maturities in the
preceding table, because borrowers have the right to call or prepay certain
obligations with or without call or prepayment penalties. At December 31, 1996,
debt securities and short-term investments with a fair value of $105,301,000
were on deposit to meet the Company's statutory obligation under insurance
department regulations.
 
NOTE 4 -- RESERVE FOR LOSSES AND LOSS ADJUSTMENT EXPENSES
 
     The Company recognized adverse development during 1996, for the accident
years 1995 and prior. Despite experiencing favorable trends in the overall
frequency and severity of claims for the 1995 and 1996 accident years, the
Company and its internal and independent actuaries observed development patterns
in the 1990-1994 accident years that were volatile when compared to previous
historical patterns. In particular, 1990-1992, were very difficult accident
years to predict, due to the impact of fraud and stress claims from adverse
economic conditions. The 1993-1994 accident years were very favorable transition
years, following legislative reforms to the workers' compensation benefits
system. Nevertheless, it was unclear how each of those years ultimately would
develop, and how subsequent accident year patterns would thus be affected, given
paid loss and case reserve activity during 1996.
 
                                      F-79
<PAGE>   215
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     The following table provides a reconciliation of beginning and ending loss
and LAE reserves for the years 1996, 1995, and 1994. All reserve totals are net
of reinsurance deductions. There are no material differences between the
Company's reserves for losses and LAE calculated in accordance with GAAP and
those reserves calculated based on statutory accounting practices.
 
       RECONCILIATION OF RESERVE FOR LOSSES AND LOSS ADJUSTMENT EXPENSES
 
<TABLE>
<CAPTION>
                                                YEAR ENDED DECEMBER 31,
                                           ----------------------------------
                                              1996         1995        1994
                                           ----------    --------    --------
                                           (RESTATED)
                                                 (AMOUNTS IN THOUSANDS)
<S>                                        <C>           <C>         <C>
Liability for losses and LAE, net of
  reinsurance recoverables on unpaid
  losses, at beginning of year...........   $ 92,641     $114,709    $111,109
Provisions for losses and LAE, net of
  reinsurance recoverable:
  Current accident year..................     62,244       49,962      60,989
  Prior accident years...................     17,646          995       2,799
                                            --------     --------    --------
Incurred losses during the current year,
  net of reinsurance recoverable.........     79,890       50,957      63,788
Losses and LAE payment for claims, net of
  reinsurance recoverable, occurring
  during:
  Current year...........................     16,398       13,473      13,641
  Prior years............................     58,669       59,552      46,547
                                            --------     --------    --------
                                              75,067       73,025      60,188
                                            --------     --------    --------
Liability for losses and LAE, net of
  reinsurance recoverable on unpaid
  losses, at end of year.................     97,464       92,641     114,709
Reinsurance recoverable, at end of
  year...................................      3,909        4,068       2,132
Less reinsurance recoverable on paid
  losses.................................       (785)        (184)       (212)
                                            --------     --------    --------
Reinsurance recoverable on unpaid losses,
  at end of year.........................      3,124        3,884       1,920
                                            --------     --------    --------
Liability for losses and LAE, gross of
  reinsurance recoverable on unpaid
  losses, at end of year.................   $100,588     $ 96,525    $116,629
                                            ========     ========    ========
</TABLE>
 
     During 1991 through 1994, the Company, and the workers' compensation
industry in California in general, went through a dramatically changing
experience in losses and LAE incurred. During 1991 and 1992, the Company
experienced a substantial number of claims related to adverse economic
conditions, particularly for the 1990 and 1991 accident years.
 
     In addition, there were "stress and strain" claims that did not involve
traumatic physical loss or injury, many of which were suspected by the Company
to be fraudulently submitted.
 
     Throughout 1994, 1995 and 1996, the Company continued to experience a
favorable trend in the frequency of new claims. The positive trends and
experience related to new claims since the second half of 1992 have been
consistent with favorable experience of other workers' compensation insurance
specialty companies in California. In addition, the level of claims closed was
in excess of the level of new claims reported during 1994 and 1995. As a result,
the Company's estimate of loss and LAE reserves for the 1993, 1994, 1995 and
1996 accident years is based on substantially lower loss ratios than the 1991
and prior accident years. Nevertheless, despite improved frequency and lower
overall loss and LAE ratios in those years, the volatile changes in legislative,
economic, managed medical care, and litigation expense factors, affecting
historical paid loss and case reserve development patterns, have made it more
difficult to estimate the ultimate
                                      F-80
<PAGE>   216
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
dollar cost of those reported claims. Thus, the inherent variability has
increased, and recognition of adverse development of prior years' estimates has
occurred.
 
NOTE 5 -- REINSURANCE
 
     Under the Company's specific excess of loss reinsurance treaty, the
reinsurers assume the liability on that portion of workers' compensation claims
between $350,000 and $80,000,000 per occurrence.
 
     The components of net premiums written are summarized as follows (amounts
in thousands):
 
<TABLE>
<CAPTION>
                                                 YEAR ENDED DECEMBER 31,
                                            ---------------------------------
                                               1996        1995        1994
                                            ----------    -------    --------
                                            (RESTATED)
<S>                                         <C>           <C>        <C>
Direct....................................   $85,796      $75,553    $101,661
Assumed...................................     2,568          375         112
Ceded.....................................    (4,479)      (3,962)     (4,789)
                                             -------      -------    --------
Net premiums written......................   $83,885      $71,966    $ 96,984
                                             -------      -------    --------
</TABLE>
 
     The components of net premiums earned are summarized as follows (amounts in
thousands):
 
<TABLE>
<CAPTION>
                                                 YEAR ENDED DECEMBER 31,
                                            ---------------------------------
                                               1996        1995        1994
                                            ----------    -------    --------
                                            (RESTATED)
<S>                                         <C>           <C>        <C>
Direct....................................   $84,916      $79,920    $100,008
Assumed...................................     2,247          209         110
Ceded.....................................    (4,509)      (4,113)     (7,224)
                                             -------      -------    --------
Net premiums earned.......................   $82,654      $76,016    $ 92,894
                                             -------      -------    --------
</TABLE>
 
     The components of net losses and loss adjustment expenses are summarized as
follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                               ------------------------------
                                                1996        1995       1994
                                               -------    --------    -------
<S>                                            <C>        <C>         <C>
Direct.......................................  $79,840    $ 54,454    $64,700
Assumed......................................    1,559         188        149
Ceded........................................   (1,509)     (3,685)    (1,061)
                                               -------    --------    -------
Net losses and loss adjustment expenses......  $79,890    $ 50,957    $63,788
                                               -------    --------    -------
</TABLE>
 
     A contingent liability exists to the extent that losses recoverable under a
reinsurance treaty are not paid to the Company by the reinsurer.
 
NOTE 6 -- LONG TERM DEBT
 
     The Company had $20,000,000 in principal outstanding on its August 16,
1994, issue of Series A Convertible Debentures, with detachable warrants to
purchase 3,800,000 shares of the Company's common stock, of which 90% were owned
by PRAC, Ltd., a Nevada limited partnership. PRAC, Ltd. is controlled by Mr.
Richard Pickup, a former director. Mr. Pickup controlled approximately 26% of
the outstanding shares of the Company through various investment entities, which
together were the Company's largest stockholder. The remaining 10% were held by
the Company's primary reinsurer.
 
                                      F-81
<PAGE>   217
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     The Debentures carried an 8% rate of interest, payable semi-annually and
were due on August 16, 1999. The Debentures were convertible at the holder's
option, into shares of common stock at a conversion price of $2.75 per share.
The Debentures were subject to automatic conversion if, after three years from
issuance, the price of the Common Stock exceeds 150% of the conversion price for
a period of 20 out of 30 consecutive trading days.
 
     The Debenture Agreement also provided for the issuance to the Investor of
detachable warrants (the "Warrants") to acquire 1,500,000 shares of the
Company's common stock at an exercise of $2.50 per share (the "Series 1
Warrants"), 1,500,000 shares at an exercise price of $3.00 per share (the
"Series 2 Warrants"), and 800,000 shares at an exercise price of $3.50 per share
(the "Series 3 Warrants"). The Warrants expired on August 16, 1999, and the
exercise price of the Warrants was subject to downward adjustment in the event
of adverse development in the Company's December 31, 1993 loss and allocated
adjustment expense reserves related to the 1992 and 1993 accident years,
measured as of June 30, 1997. Under the terms of the Debenture Agreement, the
maximum adverse development that would impact the exercise price of the Warrants
is $20,000,000. In the event that the adverse development of reserves for those
periods exceeds $20,000,000, the exercise price of Series 1 Warrants would be
reduced to $0.01, and the exercise price of the Series 2 Warrants would be
reduced to $1.39 per share.
 
     The Debenture Agreement includes covenants, which provide, among other
things, the Company maintain at least $32,200,000 in total stockholders' equity.
At December 31, 1996, the Company was not in compliance with certain of the
covenants. In April 1997, the debentures were repaid and the warrants purchased
in connection with the acquisition of the Company by SNTL.
 
     The Debentures are carried on the balance sheet net of unamortized discount
of $1,059,000 at December 31, 1996. The effective average interest rate of this
debt after consideration of debt issuance costs and discount was 13.3%.
 
     During 1996, the Company completed design and implementation of an
enhancement to it's electronic data processing system. That system created
electronic files of claim and policyholder information, which substantially
decreases the need to access paper files and allows for more efficient handling
of claims and other underwriting activities. The project included an investment
in electronic data processing equipment, as well as software. The investment was
financed through a capital lease obligation covering a period of 36 months. The
lease contains a bargain purchase option at the end of the lease term. The total
cost of the equipment and software, $1,203,000, has been included in property
and equipment, and the present value of the capital lease obligation has been
recorded as a liability. Minimum lease payments are as follows (amounts in
thousands):
 
<TABLE>
<CAPTION>
                        YEAR                          AMOUNT
                        ----                          ------
<S>                                                   <C>
1997................................................   $504
1998................................................    504
1999................................................    307
</TABLE>
 
NOTE 7 -- STOCK OPTIONS
 
     The Company has stock option plans that provide for options to purchase Pac
Rim Holding common stock at a price not less than fair values as of the date of
the grant. The options under those plans are
 
                                      F-82
<PAGE>   218
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
exercisable over a period of up to ten years, at which time they expire. A
summary of the activity in the stock option plans is as follows:
 
<TABLE>
<CAPTION>
                                                            STOCK OPTIONS
                                                   --------------------------------
                                                    SHARES          PRICE RANGE
                                                   ---------        -----------
<S>                                                <C>          <C>     <C>  <C>
Outstanding at January 1, 1994...................  1,214,000    $1.00    -   $11.41
  Granted........................................    500,000     2.75    -     5.50
  Exercised......................................         --
  Cancelled......................................   (736,375)    2.50    -    11.41
                                                   ---------
Outstanding at December 31, 1994.................    977,625     1.00    -     8.50
  Granted........................................     65,000     2.50    -     3.19
  Exercised......................................         --
  Cancelled......................................    (85,000)    3.25    -     8.50
                                                   ---------
Outstanding at December 31, 1995.................    957,625     1.00    -     8.50
  Granted........................................         --       --            --
  Exercised......................................         --       --            --
  Cancelled......................................    (52,750)    2.50    -     8.50
                                                   ---------
Outstanding at December 31, 1996.................    904,875     1.00    -     8.50
                                                   =========
</TABLE>
 
     Under the 1988 stock option plan, 510,125 shares of common stock are
available for future grants of options. As of December 31, 1996, options to
purchase 676,000 shares of the Company's common stock at a price range of $1.00
to $8.50 were vested and were exercisable under the Company's stock option plan.
Subject to certain conditions, such as continued employment, the exercise of the
options is not restricted. The options expire at various dates through 2003. The
Company accounts for these plans under APB Opinion No. 25, under which no
compensation cost has been recognized. Had compensation cost for these plans
been determined consistent with SFAS No. 123, the Company's net income (loss)
and earnings (loss) per share would not have been materially different from that
reported.
 
     Certain current officers and directors of the Company purchased as
aggregate of 136,000 shares of common stock at a purchase price of $1.00 per
share pursuant to the Pac Rim Holding 1987 Stock Purchase Plan (the "Stock
Purchase Plan"). The Stock Purchase Plan was terminated in 1988. Shares
purchased pursuant to the Stock Purchase Plan may be repurchased by Pac Rim
Holding in the event that the purchaser's service to the Company terminates
prior to specified points of time.
 
NOTE 8 - COMMITMENT AND CONTINGENCIES
 
     The Company currently leases office facilities in Woodland Hills, and
Fresno, California as well as Phoenix, Arizona under noncancellable operating
leases that are subject to escalation clauses. Minimum rental commitments on the
operating leases are as follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                        YEAR                          AMOUNT
                        ----                          ------
<S>                                                   <C>
1997................................................  2,430
1998................................................  2,381
1999................................................  2,297
2000................................................  2,269
2001................................................  2,226
All Years Thereafter................................    742
</TABLE>
 
     Rent expense for 1996, 1995 and 1994, was $2,468,000, $2,461,000 and
$2,491,000, respectively.
 
                                      F-83
<PAGE>   219
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     The Company is a party to two industrywide lawsuits, involving two medical
facilities. This litigation claims the insurance industry conspired to delay
payments of claims. While the ultimate outcome of this litigation is uncertain,
management believes that such litigation will not have a material adverse
financial effect on the Company's financial position and results of operations.
 
     In addition, in the ordinary course of business, the Company is named as a
defendant in legal proceedings relating to policies of insurance that have been
issued and other incidental matters. Management does not believe that any such
litigation, taken as a whole, will have a material adverse financial effect on
the Company's financial position and results of operations.
 
NOTE 9 -- REGULATORY MATTERS
 
     Under regulatory restrictions the ability of Pacific Rim Assurance to pay
dividends to its stockholders is limited. Generally, dividends payable during a
twelve month period, without prior regulatory approval, is limited to the
greater of net income for the preceding year or 10% of policyholders' surplus as
of the preceding December 31. The payment of dividends without prior California
Insurance Department ("DOI") approval can only be paid out of "earned surplus".
Under these provisions, Pacific Rim Assurance paid $1,100,000 in dividends in
1996 to Pac Rim Holding.
 
     As reported to insurance regulatory authorities, statutory-basis capital
and surplus of Pacific Rim Assurance at December 31, 1996 and 1995, was
$27,216,000 and $46,549,000, respectively, and the net income (loss) amounted to
$(13,069,000), $4,879,000, and $(2,878,000) for 1996, 1995, and 1994,
respectively. At December 31, 1996, Pacific Rim Assurance had a deficit balance
of $(17,202,000) in its earned surplus account. Accordingly, Pacific Rim
Assurance cannot pay dividends to its parent during 1997, without prior DOI
approval.
 
     Subsequent to Pacific Rim Assurance filing its 1995 annual statement with
regulatory authorities, the DOI issued its triennial report for the three years
ended December 31, 1995. As a result of the DOI's triennial report the Company
was required to reduce its statutory surplus by $27 million, leaving Pacific Rim
Assurance with a statutory surplus of $19 million at December 31, 1995. Pacific
Rim Assurance did not reflect or only partially reflected the DOI required
adjustments in their 1996 annual statement. The following table summarizes the
amounts required to be recorded and the amounts reflected in the Pacific Rim
Assurance 1996 annual statement. As the table reflects, Pacific Rim Assurance's
statutory surplus would have been reduced by an additional $4.626 million.
 
<TABLE>
<CAPTION>
                                                                   REDUCTION IN
                                                                 SURPLUS RECORDED
                                        REDUCTION IN SURPLUS      IN THE ANNUAL            UNRECORDED
                                          PER EXAMINATION           STATEMENT         REDUCTIONS IN SURPLUS
                                        --------------------    ------------------    ---------------------
<S>                                     <C>                     <C>                   <C>
Premiums and agents' balances due in
  the course of collections...........        $ 2,918                $ 2,918                     --
Federal income tax recoverable........          1,318                  1,318                     --
Electronic data processing
  equipment...........................          1,626                     --                 $1,626
Loss and Loss Adjustment Expense......         21,500                 18,500                  3,000
                                              -------                -------                 ------
Total.................................        $27,362                $22,736                 $4,626
                                              =======                =======                 ======
</TABLE>
 
     The Risk Based Capital Model (RBC) for property and casualty companies was
adopted by the National Association of Insurance Commissioners in December 1993,
requiring companies to calculate and report their RBC ratios annually. RBC is a
company's statutory surplus adjusted through a formula for trends in premiums
written and claims activities, credit risk, asset risk, and underwriting risk.
The Company's total adjusted capital is compared to its authorized control
level. Pacific Rim Assurance previously reported that it had met its RBC
requirements for 1996.
 
                                      F-84
<PAGE>   220
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     As a result of the adjustments discussed in Note 2 that have been recorded
as part of this restatement and adjustments indicated to be recorded as a result
of the DOI's triennial examination not reflected in its 1996 annual statement
filed with the DOI and other regulatory bodies, the RBC level of Pacific Rim
Assurance would have placed it in an action level. Depending upon the action
level that Pacific Rim Assurance would be categorized as, the DOI could have
required it to develop a rehabilitation plan, restrict or eliminate its ability
to write additional premiums, require additional surplus to be raised or take
other actions considered necessary. As a result of SNTL's acquisition of Pacific
Rim Assurance with the DOI's approval and SNTL's contribution of $10 million to
its surplus, Pacific Rim Assurance's adjusted statutory capital exceeds the
minimal RBC level.
 
NOTE 10 -- INCOME TAXES
 
     The components of the provision for total income tax expense are summarized
as follows (amount in thousands):
 
<TABLE>
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                              -------------------------------
                                                 1996        1995       1994
                                              ----------    -------    ------
                                              (RESTATED)
<S>                                           <C>           <C>        <C>
Current.....................................     $  0       $(1,061)   $ (376)
Deferred....................................      606         1,340     1,188
                                                 ----       -------    ------
          Total.............................     $606       $   279    $  812
                                                 ----       -------    ------
</TABLE>
 
     A reconciliation of income tax computed at the U.S. federal statutory tax
rates to total income tax expense is as follows (amounts in thousands):
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                                     -----------------------
                                                      1996      1995    1994
                                                      ----      ----    ----
                                                     (RESTATED)
<S>                                                  <C>        <C>     <C>
Federal statutory rate.............................  $(7,592)   $290    $670
Increase (decrease) in taxes resulting from:
  Valuation allowance..............................    8,129      --      --
  Tax-exempt interest..............................       --      (1)    (30)
  Other............................................       69     (10)    172
                                                     -------    ----    ----
          Total tax expense........................  $   606    $279    $812
                                                     =======    ====    ====
</TABLE>
 
     At December 31, 1996, the Company has an alternative minimum tax credit of
$334,000 for tax purposes. Alternative minimum tax credits may be carried
forward indefinitely to offset future regular tax liabilities. At December 31,
1996, the Company has a tax net operating loss of $23,403,000 (restated) which
can be used to offset taxable income in future years, of which $2,676,000
expires in 2010 and $20,727,000 (restated) expires in 2011.
 
                                      F-85
<PAGE>   221
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     Deferred income taxes reflect the net tax effect of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and the amounts used for income tax purposes. Significant components of
the Company's deferred tax assets and liabilities are summarized as follows
(amounts in thousands):
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,
                                                            -----------------
                                                             1996       1995
                                                            -------    ------
                                                            (RESTATED)
<S>                                                         <C>        <C>
Deferred tax assets
  Discounting of loss reserves..........................    $ 7,273    $7,189
  Unearned premiums.....................................        470       373
  Allowance for doubtful accounts.......................        855       415
  Rental expense........................................        512       518
  Unrealized loss of securities.........................        167        --
  Net operating loss carry forward......................      7,957       910
  Alternative minimum tax credit carry forward..........        334       334
  Policyholder dividends................................        121        --
  Other -- net..........................................         21        93
                                                            -------    ------
Total deferred tax assets...............................     17,710     9,832
Less: Valuation allowance...............................      8,129        --
Deferred tax liabilities:
  Deferred policy acquisition...........................        362       331
  Earned but unbilled premiums..........................        282       165
  Prepaid insurance.....................................         56        86
  Unrealized gain on securities.........................         --       835
  Other -- net..........................................        136        67
                                                            -------    ------
Total deferred tax liabilities..........................    $   836    $1,484
                                                            -------    ------
Net deferred tax assets.................................    $ 8,745    $8,348
                                                            =======    ======
</TABLE>
 
     There were no taxes paid in 1995 and 1996.
 
     Because of the significant operating loss during 1996, management believed
that it was prudent to record a valuation allowance of $8.1 million. Management
believes that it is more likely than not the net deductible temporary
differences not supported by the valuation allowance will reverse during periods
in which the Company generates net taxable income. However, there can be no
assurance the Company will generate any earnings or any specific level of
continuing earnings in future years. Certain tax planning strategies could be
implemented to supplement income from operations to fully realize recorded
benefits.
 
NOTE 11 -- DISCLOSURE OF CERTAIN SIGNIFICANT RISKS AND UNCERTAINTIES
 
  Nature of Operations
 
     During the year ended December 31, 1996, the Company wrote 88% of its
business in the state of California. The workers' compensation industry in the
state of California has seen many changes to regulations in the past few years
including the adoption of open rating. The Company cannot predict what
regulatory changes will be made in the future; therefore, the Company cannot
with certainty predict what material effects any potential changes will have on
the Company.
 
                                      F-86
<PAGE>   222
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     At December 31, 1996, 35% of the Company's premiums in force had been
generated by its five highest producing agencies and brokerage firms, two of
which accounted for 17% of total premiums in force at that date.
 
  Use of Estimates
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reporting amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
  Loss and Loss Adjustment Expenses
 
     Loss and loss adjustment expenses are based on case-basis estimates of
reported claims and on estimates, based on experience and industry data, for
unreported loss and loss adjustment expenses. The provision for unpaid loss and
loss adjustment expenses, net of estimated salvage and subrogation, has been
established to cover the estimated net cost of incurred claims. The amounts are
necessarily based on estimates, and accordingly, there can be no assurance the
ultimate liability will not differ from such estimates.
 
     There is a high level of uncertainty inherent in the evaluation of the
required loss and loss adjustment expense reserves. Management has selected
ultimate loss and loss adjustment expense that it believes will reasonably
reflect anticipated ultimate experience. The ultimate costs of such claims are
dependent upon future events, the outcomes of which are affected by many
factors. Claims reserving procedures and settlement philosophy, current and
perceived social and economic factors, inflation, current and future court
rulings and jury attitudes, and many other economic, scientific, legal,
political, and social factors all can have significant effects on the ultimate
costs of claims. Changes in Company operations and management philosophy also
may cause actual developments to vary from the past.
 
NOTE 12 -- RELATED PARTY TRANSACTIONS
 
     The Company had a five-year employment contract with its former president
that expired on August 16, 1997. Under the provisions of the contract, the
President received annual compensation of $400,000 and a possible bonus, based
on achievement by the Company of various earnings-based performance criteria.
The agreement also provided for the payment of certain other fringe benefits.
 
     The Company loaned to the former President $150,000 annually in 1991, 1992,
1993. As of December 31, 1996 and 1995, the loan balance was $450,000. The loan
bore interest at 6.3% on the principal amount, which was secured by the
President's pledge of shares of the Company's common stock, and payable in full
by February 16, 1998. As of December 31, 1996, the loan was secured by shares of
the Company's common stock with a market value equal to 100% of the principal
balance. The loan was eliminated on April 11, 1997, in conjunction with the
purchase of Pac Rim Holding.
 
     The Company granted the former President options to purchase 250,000 shares
of the Company's common stock at an exercise price of $2.75 per share and
250,000 shares at $5.50 per share.
 
     The Company used the law firm of Barger & Wolen for legal services. Dennis
W. Harwood was a member of the Company's Board of Directors, and Richard D.
Barger was a member of Pacific Rim Assurance's Board of Directors, as well as
being a partner with Barger & Wolen. During 1996, the Company paid Barger &
Wolen $711,000 for legal services. The fees paid for these services were charged
to the Company at the normal rates charged to the firm's other clients.
 
                                      F-87
<PAGE>   223
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
            PAC RIM HOLDING CORPORATION AND SUBSIDIARIES (CONTINUED)
 
     The Company also used the legal services of The Busch Firm. Timothy R.
Busch, former Chairman of the Company's Board of Directors, is a partner in The
Busch Firm. During 1996, the Company paid the Busch Firm $20,000 for legal
services. The fees paid for these services are charged to the Company at the
normal rates charged to the firm's other clients.
 
NOTE 13 -- 401(K) PLAN
 
     The Pacific Rim Assurance Company 401(K) Plan (the "Plan") permits
employees of the Company who attain the age of 21 and complete 30 days of
employment to elect to make tax-deferred contributions of a specified percentage
of their compensations during each year through payroll deductions. Under the
Plan, the Company has discretion to make additional contributions. The Company
has not yet made any discretionary employer contributions to the plan.
 
                                      F-88
<PAGE>   224
 
                                    GLOSSARY
 
DEFINED TERMS AND SELECTED INSURANCE TERMS
 
Acquisition...................   The acquisition of BIG and its insurance
                                 subsidiaries by the Company pursuant to the
                                 Acquisition Agreement.
 
Acquisition Agreement.........   The Purchase Agreement dated as of May 5, 1998
                                 between the Company and FHC.
 
Admitted assets...............   Assets recognized and accepted by state
                                 insurance regulatory authorities for their
                                 purposes in determining the financial condition
                                 of an insurance company.
 
ALE...........................   Assumption of Liability Endorsement
 
A.M. Best.....................   A.M. Best Company, Inc.
 
Associate.....................   A person or entity that controls, is under
                                 common control with, or is controlled by
                                 another person, and all individuals who are
                                 officers, directors, or control persons of any
                                 of such entities. IP's Associates include
                                 CentreLine, Centre Re, III, and IIA.
 
BICO..........................   Business Insurance Company, a wholly owned
                                 insurance subsidiary of BIG.
 
BIG...........................   Business Insurance Group, Inc., a Delaware
                                 corporation, and, where the context indicates,
                                 its wholly owned insurance subsidiaries.
 
BIG Insurance Subsidiaries....   BICO, CalComp, CCIC, and CBIC.
 
Bishop Estate.................   Estate of Bernice P. Bishop, a limited partner
                                 of III.
 
Board or Board of Directors...   Board of directors of the Company.
 
CalComp.......................   California Compensation Insurance Company, a
                                 wholly owned insurance subsidiary of BIG.
 
CBIC..........................   Combined Benefits Insurance Company, a wholly
                                 owned
                                 subsidiary of BIG.
 
CCIC..........................   Commercial Compensation Insurance Company, a
                                 wholly owned insurance subsidiary of BIG.
 
Centre Re.....................   Centre Reinsurance Limited.
 
CentreLine....................   CentreLine Reinsurance Limited, a Bermuda
                                 Corporation.
 
CentreLine Warrant............   A warrant exercisable to purchase 579,356
                                 shares of Common Stock at $5.20 per share that
                                 was issued in connection with a $20.0 million
                                 investment in the Company (and its affiliate,
                                 Superior National Capital, L.P.) by CentreLine
                                 and a second Centre Re affiliate, Centre
                                 Reinsurance Services (Bermuda) III Limited.
 
Chase.........................   The Chase Manhattan Bank.
 
Claim and claim adjustment
expenses......................   The estimated ultimate cost of claims, whether
                                 reported or unreported, charged against
                                 earnings when claims occur, including the
                                 estimated expenses of settling claims (claim
                                 adjustment expenses).
 
                                       G-1
<PAGE>   225
 
Closing.......................   Consummation of the Acquisition, the Equity
                                 Financings, and the Senior Notes Offering,
                                 which are conditioned on each other and are to
                                 occur simultaneously.
 
Closing Date..................   Date on which the Stock Offering, the Senior
                                 Notes Offering, the IP Stock Issuance, and the
                                 Acquisition all will be consummated.
 
Code..........................   Internal Revenue Code of 1986, as amended.
 
Combined ratio................   The sum of the expense ratio, the loss ratio,
                                 and the policyholder dividend ratio. A combined
                                 ratio under 100% generally indicates an
                                 underwriting profit, and a combined ratio over
                                 100% generally indicates an underwriting loss.
 
Commission....................   Securities and Exchange Commission (also
                                 referred to as the "SEC").
 
Commitment Fee Warrants.......   Warrants to purchase 734,000 shares of Common
                                 Stock at $16.75 per share that will be issued
                                 to IP and an affiliate of Zurich as payment for
                                 the Standby Commitment
 
Common Stock..................   Common Stock of the Company.
 
Company.......................   Superior National Insurance Group, Inc., a
                                 Delaware corporation and its subsidiaries (also
                                 referred to as "Superior National").
 
CSMP..........................   Claim Severity Management Program.
 
DOI...........................   California Department of Insurance.
 
EBITDA........................   Earnings before interest, taxes, minority
                                 interest, depreciation, and amortization.
 
Employee Participation........   The offering of non-transferable Rights to
                                 holders of options and grants of Restricted
                                 Stock as part of the Stock Offering.
 
Employee Participation
Agreement.....................   Agreement between the Company and each employee
                                 and consultant electing to receive Rights under
                                 the Employee Participation that contains
                                 restrictions on transferability of such Rights.
 
Equity Financings.............   The Stock Offering, the Standby Commitment, and
                                 the IP Stock Issuance.
 
Exchange Act..................   Securities Exchange Act of 1934, as amended.
 
Expense ratio.................   The ratio of underwriting expenses to net
                                 premiums earned.
 
Expiration Date...............               , 1998
 
FASB..........................   Financial Accounting Standards Board.
 
FHC...........................   Foundation Health Corporation, a Delaware
                                 corporation, a subsidiary of FHS and the
                                 immediate parent of BIG.
 
FHS...........................   Foundation Health Systems, Inc., the insurance
                                 holding company that is the ultimate parent of
                                 BIG.
 
GAAP..........................   Generally accepted accounting principles.
 
Gen Re........................   General Reinsurance Corporation.
 
IBNR..........................   A reserve for incurred but not yet reported
                                 claims.
 
                                       G-2
<PAGE>   226
 
IIA...........................   International Insurance Advisors, Inc., a New
                                 York corporation, investment advisors to III.
 
III...........................   International Insurance Investors, L.P., a
                                 Bermuda limited partnership.
 
IP............................   IP Bermuda, IP Delaware, and IP II,
                                 collectively.
 
IP Bermuda....................   Insurance Partners Offshore (Bermuda), L.P., a
                                 Bermuda limited partnership.
 
IP Delaware...................   Insurance Partners, L.P., a Delaware limited
                                 partnership.
 
IP II.........................   Insurance Partners II, L.P., a Delaware limited
                                 partnership, and/or Insurance Partners II
                                 Private Fund, L.P., a Delaware limited
                                 partnership, collectively.
 
IP Stock Issuance.............   The Company's issuance and sale of 5,611,940
                                 shares of Common Stock for $16.75 per share,
                                 aggregating approximately $94.0 million, in a
                                 private transaction pursuant to the Stock
                                 Purchase Agreement.
 
IPA...........................   Insurance Partners Advisors, L.P.
 
IRIS..........................   The NAIC's Insurance Regulatory Information
                                 System, developed to assist state insurance
                                 departments in assessing the financial health
                                 of insurance companies through application of
                                 financial ratios.
 
Loss ratio....................   The ratio of claims and claim adjustment
                                 expenses to net premiums earned.
 
Loss Reserves Guarantee.......   FHC's guarantee of BIG's claim and claim
                                 adjustment expense reserves, covering $150.0
                                 million in reserves for losses incurred prior
                                 to December 31, 1997 and an additional $25.0
                                 million for losses incurred through the
                                 Closing.
 
Moody's.......................   Moody's Investor Services, Inc.
 
NAIC..........................   National Association of Insurance
                                 Commissioners.
 
Nasdaq........................   The Nasdaq National Market.
 
Net Premiums Earned...........   The portion of net premiums written applicable
                                 to the insurance coverage provided in any
                                 particular accounting period.
 
Net Premiums Written..........   Premiums retained by an insurance company after
                                 deducting premiums on business reinsured with
                                 others.
 
1996 Stock Purchase
Agreement.....................   The Stock Purchase Agreement dated September
                                 17, 1996, as amended and restated February 17,
                                 1997, pursuant to which IP Delaware, IP
                                 Bermuda, TJS and members of the Company's
                                 management purchased Common Stock in connection
                                 with the Company's acquisition of Pac Rim.
 
NOLs..........................   Net Operating Loss Carryforwards under the
                                 Code.
 
Open rating...................   The elimination of required minimum workers'
                                 compensation premium rates in California,
                                 instituted in January 1993.
 
P&C...........................   Property and casualty insurance.
 
                                       G-3
<PAGE>   227
 
Pac Rim.......................   Pac Rim Holding Corporation, and where the
                                 context requires, its subsidiaries including
                                 The Pacific Rim Assurance Company.
 
Pac Rim Transaction...........   The Company's April 1997 acquisition of Pac Rim
                                 and its subsidiary, The Pacific Rim Assurance
                                 Company (subsequently renamed Superior Pacific
                                 Casualty Company).
 
Participating policies........   Policies that provide for the discretionary
                                 payment of dividends to policyholders (as a
                                 refund of premiums).
 
Participation Note............   Secured promissory note delivered by an
                                 employee or consultant as payment for all or a
                                 portion of the Subscription Price for shares of
                                 Common Stock purchased in the Employee
                                 Participation.
 
Persistency risk..............   The risk that insureds will not renew upon
                                 expiration of a policy and will select a
                                 different carrier.
 
Policy acquisition costs......   Agents' or brokers' commissions, premium taxes,
                                 marketing, underwriting, and other expenses
                                 associated with the production of business.
 
Policyholder dividend ratio...   The ratio of policyholder dividends incurred to
                                 net premiums earned. Policyholder dividends are
                                 amounts refunded by an insurance company to
                                 policyholders.
 
Policyholders' surplus........   The amount remaining after all liabilities are
                                 subtracted from all admitted assets, applying
                                 statutory accounting principles. This sum is
                                 regarded as financial protection to
                                 policyholders in the event an insurance company
                                 suffers unexpected or catastrophic losses.
 
Quota-Share Arrangement.......   Either of the substantially identical
                                 three-year quota-share reinsurance treaties
                                 entered into by the Company and BIG.
 
RBC...........................   Risk-based capital.
 
Record Date...................               , 1998, the Record Date for the
                                 Stock Offering.
 
Reinsurance...................   An agreement whereby an insurer transfers
                                 ("cedes") a portion of the insurance risk to a
                                 reinsurer in exchange for the payment of a
                                 premium. Reinsurance can be effected by
                                 "treaties," which automatically cover all risks
                                 of a defined category, amount, and type, or by
                                 "facultative reinsurance," which is negotiated
                                 between an original insurer and the reinsurer
                                 on an individual, contract-by-contract basis.
 
REM...........................   Risk Enterprise Management Limited, a Zurich
                                 affiliate, which provides claim severity
                                 management services to Superior Pacific.
 
Restricted Stock..............   Restricted Common Stock issued pursuant to the
                                 Company's stock incentive plans.
 
Rights........................   Subscription rights granted in respect of each
                                 share of Common Stock, option or warrant held,
                                 with each Right entitling the holder thereof to
                                 purchase one share of Common Stock for $16.75.
 
Rights Offering...............   The Company's distribution to existing
                                 stockholders (excluding IP Delaware and IP
                                 Bermuda) and warrant holders (excluding those
                                 exercising their preemptive rights to purchase
                                 shares under the terms of the IP Stock
                                 Issuance) of transferable Rights, the proceeds
                                 of which, upon exercise, will be used to
                                 acquire BIG.
 
                                       G-4
<PAGE>   228
 
S&P...........................   Standard & Poor's Corporation.
 
SAP...........................   Statutory Accounting Practices. An accounting
                                 method prescribed or permitted by state
                                 insurance regulators, which differs from GAAP
                                 principally in the following respects: (a)
                                 premium income is taken into operations over
                                 the periods covered by the policies, whereas
                                 the related acquisition and commission costs
                                 are expensed when incurred; (b) deferred income
                                 taxes are not recognized under SAP; (c) certain
                                 assets such as agents' balances over ninety
                                 days due and prepaid expenses are nonadmitted
                                 assets for statutory reporting purposes; (d)
                                 policyholder dividends are accrued when
                                 declared; (e) the cash flow statement is not
                                 consistent with classifications and the
                                 presentation under GAAP; (f) bonds are recorded
                                 at amortized cost, regardless of trading
                                 activities; (g) loss and loss adjustment
                                 expense reserves and unearned premium reserves
                                 are stated net of reinsurance; and (h) minimum
                                 statutory reserves for losses in excess of
                                 Company's estimates are required.
 
SEC...........................   Securities and Exchange Commission (also
                                 referred to as the "Commission").
 
Securities Act................   Securities Act of 1933, as amended.
 
Securities Pledge Agreement...   Agreement by which securities (which may
                                 include Common Stock already owned or purchased
                                 in the Employee Participation, options, or
                                 warrants) will be pledged by an employee or
                                 consultant to the Company as security for a
                                 Participation Note.
 
Senior Notes..................   The Company's   % Senior Notes due      .
 
Senior Notes Indenture........   The indenture pursuant to which the Senior
                                 Notes will be issued.
 
Senior Notes Offering.........   The Company's offering of its Senior Notes in
                                 the aggregate principal amount of $110.0
                                 million, the net proceeds of which will be
                                 used, among other things, to acquire BIG.
 
Senior Subordinated Notes.....   The Senior Subordinated Notes issued by the
                                 Company to the Trust, in exchange for the
                                 proceeds of the Trust's issuance of the Trust
                                 Preferred Securities.
 
Service.......................   Internal Revenue Service.
 
Service Agreements............   Long-term agreements that the Company and BIG
                                 will enter into with various subsidiaries of
                                 FHC that are not being purchased in the
                                 Acquisition, covering such services as medical
                                 bill review, PPO utilization, certain managed
                                 care services, claim negotiation and review,
                                 recruitment of employees, placement of
                                 temporary workers, and transitional corporate
                                 administrative services.
 
SNIC..........................   Superior National Insurance Company, a wholly
                                 owned insurance subsidiary of the Company.
 
SPCC..........................   Superior Pacific Casualty Company, a wholly
                                 owned insurance subsidiary of the Company.
 
Standby Commitment............   Commitment of IP to purchase at the
                                 Subscription Price up to 6,328,358 shares of
                                 Common Stock in an amount equal to the
 
                                       G-5
<PAGE>   229
 
                                 number of shares of Common Stock necessary to
                                 bring the total proceeds of the Equity
                                 Financings to $200.0 million.
 
State Fund....................   California State Compensation Insurance Fund, a
                                 quasi-public insurer required to provide
                                 insurance to all applicants.
 
Stock Offering................   The Company's offering of approximately $107.9
                                 million of Common Stock, consisting of the
                                 Rights Offering and the Employee Participation.
 
Stock Purchase Agreement......   The Stock Purchase Agreement dated as of May 5,
                                 1998 among the Company, IP Delaware, IP
                                 Bermuda, and Capital Z Partners Ltd., general
                                 partner of IP II (which subsequently assigned
                                 its interest to IP II).
 
Stock Subscription
Agreement.....................   Agreement under which purchases of Common Stock
                                 by participants in the Employee Participation
                                 will take place, which will restrict transfer
                                 of the shares purchased for one year.
 
Subordinated Indenture........   Indenture relating to the Senior Subordinated
                                 Notes.
 
Subscription Certificates.....   Certificates representing Rights to be
                                 delivered by the Subscription Agent to
                                 participants in the Stock Offering, which, in
                                 the case of the Rights Offering, will be
                                 transferable, and, in the case of the Employee
                                 Participation, will not be transferable.
 
Subscription Price............   $16.75 per share.
 
Subsidiaries..................   The direct and indirect subsidiaries of the
                                 Company, including, after the Acquisition, BIG.
 
Superior National.............   Superior National Insurance Group, Inc., a
                                 Delaware corporation, and its subsidiaries
                                 (also referred to as the "Company").
 
Superior Pacific..............   SNIC and SPCC, together.
 
TJS...........................   TJS Partners, L.P., a New York limited
                                 partnership.
 
Treaty........................   A reinsurance agreement. See "Reinsurance,"
                                 above.
 
Triennial Examination.........   A regularly scheduled triennial review of the
                                 operations and financial condition of a
                                 regulated California insurance company by the
                                 DOI as required under various provisions of the
                                 California Insurance Code.
 
Trust.........................   Superior National Capital Trust I, a subsidiary
                                 of the Company.
 
Trust Preferred Securities....   $105 million in 10 3/4% Trust Preferred
                                 Securities issued by the Trust on December 3,
                                 1997. Superior National simultaneously issued
                                 the Senior Subordinated Notes which were
                                 purchased by the Trust with the proceeds of the
                                 Offering, and provided certain guarantees in
                                 favor of the holders of the Trust Preferred
                                 Securities.
 
Underwriting..................   The process whereby an insurer reviews
                                 applications submitted for insurance coverage,
                                 determines whether it will accept all or part
                                 of the coverage requested, and determines the
                                 premiums to be charged.
 
Underwriting expenses.........   The aggregate of commissions and other policy
                                 acquisition costs, as well as the portion of
                                 administrative, general, and other expenses
                                 attributable to the underwriting operations.
 
                                       G-6
<PAGE>   230
 
Underwriting profit (loss)....   The excess (deficiency) resulting from the
                                 difference between net premiums earned and the
                                 sum of claims and claims adjustment expenses,
                                 underwriting expenses, and policyholder
                                 dividends.
 
Unpaid claim and claim
adjustment expenses...........   An estimate of claims that have occurred, both
                                 reported and unreported (including claim
                                 adjustment expenses), and have been charged
                                 against earnings but remain unpaid.
 
Voting Notes..................   14.5% Senior Subordinated Voting Notes issued
                                 by the Company on March 31, 1992, and due April
                                 1, 2002.
 
WCIRB.........................   California Workers' Compensation Insurance
                                 Rating Bureau.
 
Zurich........................   Zurich Centre Group Holdings, Limited, a
                                 Bermuda corporation.
 
ZRNA..........................   Zurich Reinsurance (North America), Inc. a
                                 Zurich affiliate.
 
1986 Plan.....................   The Company's 1986 Non-Statutory Stock Option
                                 and 1986 Non-Statutory Stock Purchase Plan.
 
1995 Plan.....................   The Company's 1995 Stock Incentive Plan.
 
14.5% Notes...................   14.5% Senior Subordinated Promissory Notes
                                 issued by the Company in 1992 and redeemed in
                                 1994.
 
                                       G-7
<PAGE>   231
 
- ------------------------------------------------------
- ------------------------------------------------------
 
  NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR THE DEALER MANAGER.
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY THE SHARES BY ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR
SOLICITATION IS NOT AUTHORIZED, OR IN WHICH THE PERSON MAKING THE OFFER OR
SOLICITATION IS NOT QUALIFIED TO DO SO, OR TO ANY PERSON TO WHOM IT IS UNLAWFUL
TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR
ANY SALE MADE HEREUNDER SHALL CREATE ANY IMPLICATION THAT THE INFORMATION
CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                              PAGE
<S>                                           <C>
Available Information.......................    2
Prospectus Summary..........................    3
Risk Factors................................   18
Use of Proceeds.............................   30
Capitalization..............................   31
Market Price of and Dividends on the Common
  Stock.....................................   32
Dilution....................................   33
Acquisition of Business Insurance Group,
  Inc.......................................   34
Unaudited Pro Forma Financial Information...   37
The Stock Offering..........................   43
Superior National Information Selected
  Consolidated Financial Data...............   52
Superior National Management's Discussion
  and Analysis of Financial Condition and
  Results of Operations.....................   55
Superior National Business..................   64
Superior National Management................   86
Security Ownership of Certain Beneficial
  Owners and Management.....................   94
Certain Relationships and Related
  Transactions..............................  102
Business Insurance Group, Inc. Information
  Selected Combined Financial Data..........  107
Business Insurance Group, Inc. Management's
  Discussion and Analysis of Financial
  Condition and Results of Operations.......  108
Business Insurance Group, Inc. Business.....  113
Description of Capital Stock................  125
Shares Eligible for Future Sale.............  129
Certain Federal Income Tax Considerations...  130
Legal Matters...............................  133
Experts.....................................  133
Index to Consolidated Financial
  Statements................................  F-1
Glossary....................................  G-1
</TABLE>
 
- ------------------------------------------------------
- ------------------------------------------------------
- ------------------------------------------------------
- ------------------------------------------------------
 
                                6,548,664 SHARES
 
                               SUPERIOR NATIONAL
                             INSURANCE GROUP, INC.
 
                                  COMMON STOCK
 
                                     [LOGO]
                            ------------------------
 
                                   PROSPECTUS
                            ------------------------
                                DEALER MANAGER:
 
                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
                                          , 1998
 
- ------------------------------------------------------
- ------------------------------------------------------
<PAGE>   232
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
     The following table sets forth the various expenses and costs expected to
be incurred in connection with the sale and distribution of the securities being
registered hereby. In the case of printing, legal and accounting fees, the
expenses and costs reflect estimates of the amount of such expenses attributable
to this Stock Offering, and not to the Acquisition or other related financing
transactions. All of the amounts shown are estimated except the registration fee
of the Securities and Exchange Commission, the NASD filing fee and the Nasdaq
National Market listing fee.
 
<TABLE>
<CAPTION>
                            ITEM                               AMOUNT
                            ----                              --------
<S>                                                           <C>
Securities and Exchange Commission registration fee.........  $ 32,359
NASD filing fee.............................................    11,469
Nasdaq National Market listing fee..........................    35,000
Blue Sky fees and expenses..................................     5,000
Printing expenses...........................................   100,000
Legal fees and expenses.....................................   250,000
Accounting fees and expenses................................   125,000
Subscription Agent, Transfer Agent, and Custodian fees......    20,000
Miscellaneous...............................................    46,172
                                                              --------
          Total.............................................  $625,000
                                                              ========
</TABLE>
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     Pursuant to Section 145 of the General Corporation Law of the State of
Delaware (the "Delaware Corporation Law"), Article VI of the By-laws of the
Company, a copy of which is incorporated by reference as Exhibit 3.2 to this
Registration Statement (the "By-laws"), provides that the Company shall
indemnify and hold harmless to the fullest extent authorized by applicable law,
including the Delaware Corporation Law, any person made a party or threatened to
be made a party to or involved in any action, suit or proceeding, whether civil,
criminal, administrative or investigative (provided that any such party shall
only be so indemnified in connection with any such action, suit or proceeding
commenced by such party if such commencement was authorized by the Board of
Directors of the Company) by reason of the fact that he, or a person for whom he
is the legal representative, is or was a director or officer of the Company or,
while a director or officer of the Company, is or was serving at the request of
the Company as a director, officer, employee or agent of another corporation or
of a partnership, joint venture, trust, enterprise or nonprofit entity,
including service with respect to employee benefit plans, against all expense,
liability and loss (including attorneys' fees) reasonably incurred or suffered
by such person in connection therewith. If a claim under the foregoing provision
of the By-laws is not paid in full by the Company within sixty days after its
receipt of a written claim, the claimant may bring suit against the Company to
recover the unpaid amount of the claim, and if successful, in whole or in part,
the claimant is entitled to the expenses of prosecuting such claim. In any such
action, the Company shall have the burden of proving that the claimant is not
entitled to the requested indemnification under applicable law.
 
     Pursuant to Section 102(b)(7) of the Delaware Corporation Law, Article
Eleventh of the Certificate of Incorporation of the Company (the "Certificate of
Incorporation") provides that no director of the Company shall be liable to the
Company or its stockholders for monetary damages for a breach of his duty as a
director, except for liability (i) for any breach of the director's duty of
loyalty to the Company or its stockholders, (ii) for acts or omissions not in
good faith or which involve intentional misconduct or a knowing violation of
law, (iii) under Section 174 of the Delaware Corporation Law or (iv) for any
transaction from which the director derived an improper personal benefit.
 
                                      II-1
<PAGE>   233
 
     The foregoing discussion of the By-laws, Certificate of Incorporation and
the Delaware Corporation Law is not intended to be exhaustive and is qualified
in its entirety by the By-laws, Certificate of Incorporation and the relevant
provisions of applicable law, including the Delaware Corporation Law.
 
     Reference is made to the Dealer Manager Agreement (attached as Exhibit 99.7
to this Registration Statement), pursuant to which the Dealer Manager has agreed
to indemnify the directors and officers of the Company against certain
liabilities, including those arising under the Securities Act, with respect to
the Preliminary Prospectus and the Prospectus relating to the Stock Offering.
 
     Reference also is made to the Acquisition Agreement (incorporated by
reference herein as Exhibit 2.2), the 1996 Stock Purchase Agreement
(incorporated by reference herein as Exhibit 10.22), the Stock Purchase
Agreement (incorporated by reference herein as Exhibit 10.56), the Registration
Rights Agreement (incorporated by reference herein as Exhibit 10.23 to this
Registration Statement) and the Registration Rights Agreement (incorporated by
reference herein as Exhibit 10.24 to this Registration Statement), each of which
provides for indemnification by certain parties thereto of the directors and
officers of the Company, against certain liabilities, including those arising
under the Securities Act, with respect to the subject matter thereof.
 
     The directors and officers of the Company and its subsidiaries are insured
under certain insurance policies against claims made during the period of the
policies against liabilities arising out of claims for certain acts in their
capacities as directors and officers of the Company and its subsidiaries.
 
     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted with respect to directors, officers or persons controlling the
Company pursuant to the foregoing provisions, the Company has been informed
that, in the opinion of the Securities and Exchange Commission, such
indemnification is against public policy as expressed in the Securities Act and
is therefore unenforceable.
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
     All securities of the Company sold by the Company within the past three
years that were not registered under the Securities Act have previously been
disclosed.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     (a) EXHIBITS
 
     The following Exhibits are attached to, or incorporated by reference in,
this Registration Statement.
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION
<S>      <C>
2.1      Amended and Restated Agreement and Plan of Merger, dated as
         of February 17, 1997, among the Company, SNTL Acquisition
         Corp., and Pac Rim Holding Corporation****
2.2      Purchase Agreement dated as of May 5, 1998 by and between
         FHC and the Company(6)
3.1      Certificate of Incorporation of the Company, as currently in
         effect++
3.2      Bylaws of the Company, as currently in effect++
4.1      Amended and Restated Declaration of Trust of the Trust,
         dated as of December 3, 1997, including the Trust's
         Certificate of Trust and the forms of Trust Common
         Securities, Trust Preferred Securities, and Exchange Trust
         Preferred Securities(4)
4.3      Senior Subordinated Indenture, including forms of the Senior
         Subordinated Notes and Exchange Senior Subordinated Notes,
         dated as of December 3, 1997, between the Company and
         Wilmington Trust Company, as trustee, providing for the sale
         by the Company to the Trust of the Senior Subordinated
         Notes(4)
4.4      Guarantee Agreement, dated as of December 3, 1997, between
         the Company and Wilmington Trust Company, as trustee, with
         respect to the Trust Preferred Securities(4)
4.5      Guarantee Agreement with Respect to Common Securities, dated
         as of December 3, 1997, by the Company(4)
4.6      Form of Exchange Guarantee Agreement between the Company and
         Wilmington Trust Company, as trustee, with respect to the
         Exchange Trust Preferred Securities(4)
</TABLE>
 
                                      II-2
<PAGE>   234
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION
<S>      <C>
4.7      Indenture, including forms of the Senior Notes, dated as of
                     , 1998, between the Company and           , as
         Trustee(8)
5        Opinion of Riordan & McKinzie as to legality of the
         securities being offered
10.1     Employment Agreement, dated June 1, 1997, by and between Mr.
         William L. Gentz, President and Chief Executive Officer of
         the Company, and the Company+++++
10.2     Employment Agreement, dated February 17, 1997, by and
         between Mr. Arnold J. Senter, Executive Vice President and
         Chief Operating Officer of the Company, and the Company+
10.3     Employment Agreement, dated June 1, 1997, by and between Mr.
         J. Chris Seaman, Executive Vice President and Chief
         Financial Officer of the Company, and the Company+++++
10.4     1986 Non-Statutory Stock Option and 1986 Non-Statutory Stock
         Purchase Plan***
10.5     1995 Stock Incentive Plan***
10.6     Aggregate Excess of Loss Cover entered into on the 30th day
         of August 1991, between Centre Reinsurance Limited (Centre
         Re) and the Company, as amended*
10.7     Multi-year Prospective Accident Year Stop Loss Reinsurance
         Contract effective the 1st of January 1993, between Centre
         Reinsurance International Company and the Company (the "1993
         Centre Re Contract")*
10.8     Letter dated March 28, 1996 from the Company canceling the
         1993 Centre Re Contract effective January 1, 1996***
10.9     Workers' Compensation and Employers' Liability Quota Share
         Insurance Contract No. 30006A, effective January 1, 1994,
         between the Company and Zurich Reinsurance Centre, as
         amended (the "ZRC Contract")*
10.10    Addendum No. 4 to the ZRC Contract effective as of January
         1, 1996***
10.11    Addendum No. 1 to the Retrocession Agreement (an ancillary
         agreement to the ZRC Contract) effective as of January 1,
         1996***
10.12    Lease, dated 27th day of October 1988, by and between
         Corporate Center at Malibu Canyon, a California Limited
         Partnership and the Company, relating to the lease of the
         Company's home office and Calabasas Branch Facilities*
10.13    Lease, dated 27th of July 1993, by and between TOMOE
         Investment and Development, Inc. and the Company, relating
         to the lease of its South San Francisco Facility*
10.14    Lease, dated 14th of November 1991, by and between Dean
         Witter Reynolds and the Company relating to the lease of its
         Fresno Facilities*
10.15    Lease, dated 23rd of February 1993, by and between Shaw
         Avenue Associates, a California Limited Partnership, and the
         Company relating to the lease of its Fresno Facilities*
10.16    Lease, dated 14th of February 1994, by and between Contra
         Costa County Employees Retirement Association and the
         Company relating to its Sacramento Facility*
10.17    Agreement in Principle, dated 29th of March 1994, by and
         between the Company and Centre Reinsurance Limited or one of
         its affiliates*
10.18    Limited Partnership Agreement of Superior National Capital,
         L.P. with certificate of Limited Partnership and Certificate
         of Exempted Partnership, all as filed on the 28th of June
         1994, with the Registrar of Companies of Bermuda*
10.19    Termination and Release Agreement, dated as of December 3,
         1997, among the Company, Superior Pacific Insurance Group,
         Inc., the subsidiaries of the Company signatories thereto,
         The Chase Manhattan Bank, and certain financial institutions
         with respect to the Credit Agreement dated as of April 11,
         1997(4)
10.20    Purchase warrant, dated as of the 30th of June 1994,
         entitling Centreline Reinsurance Limited to purchase 579,356
         shares of Common Stock*
10.21    Form of Common Stock Purchase Warrant, held by those members
         of the Company's management and other parties set forth on
         the schedule attached thereto, to purchase an aggregate of
         1,566,465 shares of the Company common stock(4)
10.22    Stock Purchase Agreement, dated as of September 17, 1996, as
         amended and restated effective as of February 17, 1997,
         among the Company, Insurance Partners, L.P., Insurance
         Partners Offshore (Bermuda), L.P., TJS Partners, L.P., and
         certain members of the Company's management****
10.23    Registration Rights Agreement, dated as of April 11, 1997,
         among the Company, Insurance Partners, L.P., and Insurance
         Partners Offshore (Bermuda), L.P.+++
</TABLE>
 
                                      II-3
<PAGE>   235
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION
<S>      <C>
10.24    Registration Rights Agreement, dated as of December 3, 1997,
         among the Company, the Trust, and the Initial Purchasers
         named therein(4)
10.25    Letter Agreement, dated November 25, 1996, among the Company
         and the shareholders and holders of warrants party thereto,
         relating to such warrants and certain registration rights+++
10.26    Agreement with Prime Advisors regarding investment
         Management Services provided to the Company dated April 12,
         1997+++
10.27    Addendum No. 2 to the Retrocession Agreement between
         Superior National Insurance Company and Zurich Reinsurance
         Centre, Inc. effective January 1, 1997(4)
10.28    State of California Department of Insurance Amended
         Certificate of Authority+++++
10.29    The Pacific Rim Assurance Company 401(k) Plan (incorporated
         by reference from Exhibit 10.11 of Pac Rim Holding
         Corporation's Registration Statement on Form S-1)(1)
10.33    Office Space Lease, dated February 11, 1991, between Rancon
         Realty Fund V and The Pacific Rim Assurance Company(1)
10.34    Office building lease, dated January 21, 1992, between The
         Pacific Rim Assurance Company and Trizec Warner, Inc. for
         office space in Woodland Hills, California, and related
         Guaranty of Pac Rim Holding Corporation(1)
10.35    Addendum No. 2, dated as of September 2, 1992, of Office
         Building Lease between The Pacific Rim Assurance Company and
         Trizec Warner, Inc.(1)
10.36    Office Building Lease, dated October 2, 1992, between The
         Pacific Rim Assurance Company and Richard V. Gunner & George
         Andros, for office space in Fresno, California(1)
10.37    Sublease, dated February 3, 1994, between The Pacific Rim
         Assurance Company and the Federal Emergency Management
         Agency, for office space in Woodland Hills, California(1)
10.38    Sublease, dated February 25, 1994, between The Pacific Rim
         Assurance Company and The Money Store, for office space in
         Woodland Hills, California(1)
10.39    Lease Amendment #1, dated April 1, 1993, to the Office
         Property Lease between Rancon Realty Fund V and The Pacific
         Rim Assurance Company(1)
10.40    Sublease, dated May 1, 1994, between The Pacific Rim
         Assurance Company and Group Data Services, Incorporated(1)
         10.41 Office lease between L.A.X. Business Center and Pac
         Rim Holding Corporation dated June 1, 1995(1)
10.42    Certificate of Authority from Department of Insurance, State
         of Arizona to transact the business of Casualty With
         Workers' Compensation Insurance(1)
10.43    Certificate of Authority from Department of Insurance, State
         of Texas to transact the business of casualty with workers'
         compensation insurance(1)
10.44    Sublease, dated August 15, 1995, between The Pacific Rim
         Assurance Company and the General Services Administration(1)
10.45    Sales, License and Service Agreement, dated November 14,
         1995, between Macess Corporation and The Pacific Rim
         Assurance Company for equipment purchases, software license,
         and professional prepaid support and software maintenance(1)
10.47    Certificate of Authority from the State of Georgia Office of
         Commissioner of Insurance, to transact the business of
         Property and Casualty (including Workers' Compensation)(1)
10.48    Producer agreement, dated May 15, 1996, between Regional
         Benefits Insurance Services, a subsidiary of Superior
         Pacific Casualty Company, and Hull & Co., Inc.(2)
10.49    Producer agreement, dated May 15, 1996, between Regional
         Benefits Insurance Services, and Gulf Atlantic Management
         Group, Inc.(2)
10.50    Office lease, dated May 20, 1996, between Gulf Atlantic
         Investment Group, Inc. and Regional Benefits Insurance
         Services, Inc.(2)
10.51    Employment Agreement between Pac Rim Holding Corporation and
         Stanley Braun, dated April 15, 1994, as amended March 27,
         1995, and March 30, 1996(3)
10.52    Third Amendment to Employment Agreement, dated as of April
         10, 1997, between Pac Rim Holding Corporation and Stanley
         Braun.++++
10.53    Agreement for Services between REM and SNIC, relating to the
         Claim Severity Management Program(5)
10.54    Average Existing Claim Severity Agreement, effective
         December 31, 1997, between ZRNA and Superior Pacific(5)
</TABLE>
 
                                      II-4
<PAGE>   236
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION
<S>      <C>
10.55    Lease, dated October 29, 1997, between Property California
         OB One Corporation and SNIC, relating to the lease of its
         Pleasanton, California, facility(5)
10.56    Stock Purchase Agreement, dated as of May 5, 1998, among the
         Company, IP Delaware, IP Bermuda, and Capital Z Partners
         Ltd., with forms of a Registration Rights Agreement and
         Common Stock Purchase Warrant exercisable to purchase an
         aggregate of 734,000 shares of Common Stock attached as
         exhibits thereto(6)
10.57    Voting Agreement, dated as of May 5, 1998, between FHC and
         Insurance Partners, L.P.(6)
10.58    Voting Agreement, dated as of May 5, 1998, between FHC and
         Insurance Partners Offshore (Bermuda), L.P.(6)
10.59    Voting Agreement, dated as of May 5, 1998, between FHC and
         Mr. Thomas J. Jamieson(6)
10.60    Voting Agreement, dated as of May 5, 1998, between FHC and
         Jaco Oil Company(6)
10.61    Form of Voting Agreement, dated as of May 5, 1998, between
         FHC and the other parties set forth on the schedule attached
         thereto(6)
10.62    Retainer and Consulting Agreement dated as of December 31,
         1997 between the Company, SNIC, SPCC, and REM
10.63    Workers' Compensation Quota Share Large Account Business
         Reinsurance Contract, effective February 1, 1998, issued to
         the Company
12       Computation of Ratio of Earnings to Fixed Charges and
         Preferred Dividends and EBITDA calculations
21       Subsidiaries of the Company(4)
23.1     Consent of KPMG Peat Marwick LLP
23.2     Consent of Deloitte & Touche LLP
24       Power of Attorney (filed on page II-4 hereof).
27.1     Financial Data Schedule -- Company -- Fiscal Year ended
         December 31, 1997(5)
27.2     Financial Data Schedule -- Company -- Quarter ended March
         31, 1997(6)
27.3     Financial Data Schedule -- BIG -- Fiscal Year ended December
         31, 1997
27.4     Financial Data Schedule -- BIG -- Quarter ended March 31,
         1998
27.5     Financial Data Schedule -- Pac Rim -- Fiscal Year ended
         December 31, 1996(7)
99.1     Form of Subscription Certificate to be used in the Rights
         Offering(8)
99.2     Subscription Certificate to be used in the Employee
         Participation(8)
99.3     Form of Employee Participation Agreement to be used in the
         Employee Participation(8)
99.4     Form of Stock Subscription Agreement to be used in the
         Employee Participation(8)
99.5     Form of Securities Pledge Agreement to be used in the
         Employee Participation(8)
99.6     Form of Promissory Note to be used in the Employee
         Participation(8)
99.7     Dealer Manager Agreement(8)
</TABLE>
 
- ------------------------------
*      Previously filed as an exhibit to the Company's Registration Statement on
       Form 10, as filed with the Securities and Exchange Commission ("SEC") on
       May 1, 1995 (File No. 0-25984).
 
**    Previously filed as an exhibit to Amendment No. 2 to the Company's
      Registration Statement on Form 10/A, as filed with the SEC on November 1,
      1995 (File No. 0-25984).
 
***   Previously filed as an exhibit to the Company's Annual Report on Form 10-K
      for the fiscal year ended December 31, 1995, as filed with the SEC on
      March 29, 1996.
 
**** Previously filed as an exhibit to the Company's statement on Schedule 13D,
     as filed with the SEC on February 27, 1997.
 
+      Previously filed as an exhibit to the Company's Annual Report on Form
       10-K for the fiscal year ended December 31, 1996, as filed with the SEC
       on March 10, 1997.
 
++    Previously filed as an exhibit to the Company's Current Report on Form
      8-K, as filed with the SEC on April 24, 1997.
 
                                      II-5
<PAGE>   237
 
+++   Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended March 31, 1997, as filed with the SEC on May
      15, 1997.
 
++++  Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended June 30, 1997, as filed with the SEC on August
      14, 1997.
 
+++++ Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended September 30, 1997, as filed with the SEC on
      November 13, 1997.
 
(1)   Incorporated by reference from the Exhibits to the Annual Report on Form
      10-K of Pac Rim Holding Corporation for the year ended December 31, 1995.
 
(2)   Previously filed with the Quarterly Report on Form 10-Q of Pac Rim Holding
      Corporation, for the quarter ended June 30, 1996.
 
(3)   Previously filed as Exhibit K to Annex C of the Company's Proxy Statement
      on Schedule 14A dated March 10, 1997.
 
(4)   Previously filed as an exhibit to the Company's and the Trust's
      Registration Statement on Form S-4 (Registration No. 333-43505) on
      December 30, 1997.
 
(5)   Previously filed as an exhibit to the Company's Annual Report on Form 10-K
      for the fiscal year ended December 31, 1997, as filed with the SEC on
      March 31, 1998.
 
(6)   Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended March 31, 1998, as filed with the SEC on May
      15, 1998.
 
(7)   Previously filed as an exhibit to the Company's Current Report on Form
      8-K/A, as filed with the SEC on September 5, 1997.
 
(8)   To be filed by amendment.
 
     (b) FINANCIAL STATEMENT SCHEDULES
 
     Schedule I:  Condensed Financial Information of Registrant, Superior
                  National Insurance Group, Inc.
 
     Schedule II: Valuation and Qualifying Accounts and Reserves
 
     Schedule V:  Supplemental Insurance Information, Reinsurance and
                  Supplemental Property and Casualty Insurance Information
 
     Schedules other than those referred to above have been omitted because they
are not applicable or not required or because the information is included
elsewhere in the Financial Statements or the notes thereto.
 
                                      II-6
<PAGE>   238
 
ITEM 17. UNDERTAKINGS
 
     1. Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the undersigned Registrant pursuant to the foregoing provisions, or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.
 
     2. The undersigned Registrant hereby undertakes that:
 
          (a) For purposes of determining any liability under the Securities Act
     of 1933, the information omitted from the form of prospectus filed as part
     of this registration statement in reliance upon Rule 430A and contained in
     a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or
     (4) or 497(h) under the Securities Act shall be deemed to be part of this
     registration statement as of the time is was declared effective.
 
          (b) For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.
 
     3. The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-7
<PAGE>   239
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Calabasas, State of
California, on the 6th day of July, 1998.
 
                                          SUPERIOR NATIONAL INSURANCE
                                          GROUP, INC.
 
                                          By: /s/ J. CHRIS SEAMAN
 
                                            ------------------------------------
                                            J. Chris Seaman
                                            Executive Vice President and
                                            Chief Financial Officer
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints J. Chris Seaman and William L. Gentz, and each of
them, his true and lawful attorneys-in-fact and agents, each with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments, including post-effective
amendments, to this Registration Statement, and any registration statement
relating to the offering covered by this Registration Statement and filed
pursuant to Rule 462(b) under the Securities Act of 1993, and to file the same,
with exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents
and purposes as he might or could do in person, hereby ratifying and confirming
all that each of said attorneys-in-fact and agents or their substitute or
substitutes may lawfully do or cause to be done by virtue hereof.
 
     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.
 
<TABLE>
<CAPTION>
                        NAME                                          TITLE                   DATE
<C>                                                      <S>                              <C>
 
                  /s/ WILLIAM GENTZ                      Director, President and Chief     July 6, 1998
- -----------------------------------------------------    Executive Officer (Principal
                    William Gentz                        Executive Officer)
 
                 /s/ J. CHRIS SEAMAN                     Director, Executive Vice          July 6, 1998
- -----------------------------------------------------    President and Chief Financial
                   J. Chris Seaman                       Officer (Principal Financial
                                                         Officer and Principal
                                                         Accounting Officer)
 
                /s/ STEVEN D. GERMAIN                    Director                          July 6, 1998
- -----------------------------------------------------
                  Steven D. Germain
 
               /s/ CRAIG F. SCHWARBERG                   Director                          July 6, 1998
- -----------------------------------------------------
                 Craig F. Schwarberg
 
               /s/ THOMAS J. JAMIESON                    Director                          July 6, 1998
- -----------------------------------------------------
                 Thomas J. Jamieson
</TABLE>
 
                                      II-8
<PAGE>   240
 
<TABLE>
<CAPTION>
                        NAME                                          TITLE                   DATE
<C>                                                      <S>                              <C>
                 /s/ GORDON E. NOBLE                     Director                          July 6, 1998
- -----------------------------------------------------
                   Gordon E. Noble
 
                /s/ C. LEN PECCHENINO                    Director                          July 6, 1998
- -----------------------------------------------------
                  C. Len Pecchenino
 
                 /s/ ROBERT A. SPASS                     Director                          July 6, 1998
- -----------------------------------------------------
                   Robert A. Spass
 
                /s/ BRADLEY E. COOPER                    Director                          July 6, 1998
- -----------------------------------------------------
                  Bradley E. Cooper
 
                /s/ STEVEN B. GRUBER                     Director                          July 6, 1998
- -----------------------------------------------------
                  Steven B. Gruber
 
                /s/ ROGER W. GILBERT                     Director                          July 6, 1998
- -----------------------------------------------------
                  Roger W. Gilbert
</TABLE>
 
                                      II-9
<PAGE>   241
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
                                                                           SEQUENTIALLY
EXHIBIT                                                                      NUMBERED
NUMBER                       DESCRIPTION OF DOCUMENT                           PAGE
<C>        <S>                                                             <C>
   2.1     Amended and Restated Agreement and Plan of Merger, dated as
           of February 17, 1997, among the Company, SNTL Acquisition
           Corp., and Pac Rim Holding Corporation****..................
   2.2     Purchase Agreement dated as of May 5, 1998 by and between
           FHC and the Company(6)......................................
   3.1     Certificate of Incorporation of the Company, as currently in
           effect++....................................................
   3.2     Bylaws of the Company, as currently in effect++.............
   4.1     Amended and Restated Declaration of Trust of the Trust,
           dated as of December 3, 1997, including the Trust's
           Certificate of Trust and the forms of Trust Common
           Securities, Trust Preferred Securities, and Exchange Trust
           Preferred Securities(4).....................................
   4.3     Senior Subordinated Indenture, including forms of the Senior
           Subordinated Notes and Exchange Senior Subordinated Notes,
           dated as of December 3, 1997, between the Company and
           Wilmington Trust Company, as trustee, providing for the sale
           by the Company to the Trust of the Senior Subordinated
           Notes(4)....................................................
   4.4     Guarantee Agreement, dated as of December 3, 1997, between
           the Company and Wilmington Trust Company, as trustee, with
           respect to the Trust Preferred Securities(4)................
   4.5     Guarantee Agreement with Respect to Common Securities, dated
           as of December 3, 1997, by the Company(4)...................
   4.6     Form of Exchange Guarantee Agreement between the Company and
           Wilmington Trust Company, as trustee, with respect to the
           Exchange Trust Preferred Securities(4)......................
   4.7     Indenture, including forms of the Senior Notes, dated as of
                       , 1998, between the Company and           , as
           Trustee(8)..................................................
   5       Opinion of Riordan & McKinzie as to legality of the
           securities being offered....................................
  10.1     Employment Agreement, dated June 1, 1997, by and between Mr.
           William L. Gentz, President and Chief Executive Officer of
           the Company, and the Company+++++...........................
  10.2     Employment Agreement, dated February 17, 1997, by and
           between Mr. Arnold J. Senter, Executive Vice President and
           Chief Operating Officer of the Company, and the Company+....
  10.3     Employment Agreement, dated June 1, 1997, by and between Mr.
           J. Chris Seaman, Executive Vice President and Chief
           Financial Officer of the Company, and the Company+++++......
  10.4     1986 Non-Statutory Stock Option and 1986 Non-Statutory Stock
           Purchase Plan***............................................
  10.5     1995 Stock Incentive Plan***................................
  10.6     Aggregate Excess of Loss Cover entered into on the 30th day
           of August 1991, between Centre Reinsurance Limited (Centre
           Re) and the Company, as amended*............................
  10.7     Multi-year Prospective Accident Year Stop Loss Reinsurance
           Contract effective the 1st of January 1993, between Centre
           Reinsurance International Company and the Company (the "1993
           Centre Re Contract")*.......................................
  10.8     Letter dated March 28, 1996 from the Company canceling the
           1993 Centre Re Contract effective January 1, 1996***........
  10.9     Workers' Compensation and Employers' Liability Quota Share
           Insurance Contract No. 30006A, effective January 1, 1994,
           between the Company and Zurich Reinsurance Centre, as
           amended (the "ZRC Contract")*...............................
</TABLE>
<PAGE>   242
 
<TABLE>
<CAPTION>
                                                                           SEQUENTIALLY
EXHIBIT                                                                      NUMBERED
NUMBER                       DESCRIPTION OF DOCUMENT                           PAGE
<C>        <S>                                                             <C>
  10.10    Addendum No. 4 to the ZRC Contract effective as of January
           1, 1996***..................................................
  10.11    Addendum No. 1 to the Retrocession Agreement (an ancillary
           agreement to the ZRC Contract) effective as of January 1,
           1996***.....................................................
  10.12    Lease, dated 27th day of October 1988, by and between
           Corporate Center at Malibu Canyon, a California Limited
           Partnership and the Company, relating to the lease of the
           Company's home office and Calabasas Branch Facilities*......
  10.13    Lease, dated 27th of July 1993, by and between TOMOE
           Investment and Development, Inc. and the Company, relating
           to the lease of its South San Francisco Facility*...........
  10.14    Lease, dated 14th of November 1991, by and between Dean
           Witter Reynolds and the Company relating to the lease of its
           Fresno Facilities*..........................................
  10.15    Lease, dated 23rd of February 1993, by and between Shaw
           Avenue Associates, a California Limited Partnership, and the
           Company relating to the lease of its Fresno Facilities*.....
  10.16    Lease, dated 14th of February 1994, by and between Contra
           Costa County Employees Retirement Association and the
           Company relating to its Sacramento Facility*................
  10.17    Agreement in Principle, dated 29th of March 1994, by and
           between the Company and Centre Reinsurance Limited or one of
           its affiliates*.............................................
  10.18    Limited Partnership Agreement of Superior National Capital,
           L.P. with certificate of Limited Partnership and Certificate
           of Exempted Partnership, all as filed on the 28th of June
           1994, with the Registrar of Companies of Bermuda*...........
  10.19    Termination and Release Agreement, dated as of December 3,
           1997, among the Company, Superior Pacific Insurance Group,
           Inc., the subsidiaries of the Company signatories thereto,
           The Chase Manhattan Bank, and certain financial institutions
           with respect to the Credit Agreement dated as of April 11,
           1997(4).....................................................
  10.20    Purchase warrant, dated as of the 30th of June 1994,
           entitling Centreline Reinsurance Limited to purchase 579,356
           shares of Common Stock*.....................................
  10.21    Form of Common Stock Purchase Warrant, held by those members
           of the Company's management and other parties set forth on
           the schedule attached thereto, to purchase an aggregate of
           1,566,465 shares of the Company common stock(4).............
  10.22    Stock Purchase Agreement, dated as of September 17, 1996, as
           amended and restated effective as of February 17, 1997,
           among the Company, Insurance Partners, L.P., Insurance
           Partners Offshore (Bermuda), L.P., TJS Partners, L.P., and
           certain members of the Company's management****.............
  10.23    Registration Rights Agreement, dated as of April 11, 1997,
           among the Company, Insurance Partners, L.P., and Insurance
           Partners Offshore (Bermuda), L.P.+++........................
  10.24    Registration Rights Agreement, dated as of December 3, 1997,
           among the Company, the Trust, and the Initial Purchasers
           named therein(4)............................................
  10.25    Letter Agreement, dated November 25, 1996, among the Company
           and the shareholders and holders of warrants party thereto,
           relating to such warrants and certain registration
           rights+++...................................................
  10.26    Agreement with Prime Advisors regarding investment
           Management Services provided to the Company dated April 12,
           1997+++.....................................................
  10.27    Addendum No. 2 to the Retrocession Agreement between
           Superior National Insurance Company and Zurich Reinsurance
           Centre, Inc. effective January 1, 1997(4)...................
  10.28    State of California Department of Insurance Amended
           Certificate of Authority+++++...............................
</TABLE>
<PAGE>   243
 
<TABLE>
<CAPTION>
                                                                           SEQUENTIALLY
EXHIBIT                                                                      NUMBERED
NUMBER                       DESCRIPTION OF DOCUMENT                           PAGE
<C>        <S>                                                             <C>
  10.29    The Pacific Rim Assurance Company 401(k) Plan (incorporated
           by reference from Exhibit 10.11 of Pac Rim Holding
           Corporation's Registration Statement on Form S-1)(1)........
  10.33    Office Space Lease, dated February 11, 1991, between Rancon
           Realty Fund V and The Pacific Rim Assurance Company(1)......
  10.34    Office building lease, dated January 21, 1992, between The
           Pacific Rim Assurance Company and Trizec Warner, Inc. for
           office space in Woodland Hills, California, and related
           Guaranty of Pac Rim Holding Corporation(1)..................
  10.35    Addendum No. 2, dated as of September 2, 1992, of Office
           Building Lease between The Pacific Rim Assurance Company and
           Trizec Warner, Inc.(1)......................................
  10.36    Office Building Lease, dated October 2, 1992, between The
           Pacific Rim Assurance Company and Richard V. Gunner & George
           Andros, for office space in Fresno, California(1)...........
  10.37    Sublease, dated February 3, 1994, between The Pacific Rim
           Assurance Company and the Federal Emergency Management
           Agency, for office space in Woodland Hills, California(1)...
  10.38    Sublease, dated February 25, 1994, between The Pacific Rim
           Assurance Company and The Money Store, for office space in
           Woodland Hills, California(1)...............................
  10.39    Lease Amendment #1, dated April 1, 1993, to the Office
           Property Lease between Rancon Realty Fund V and The Pacific
           Rim Assurance Company(1)....................................
  10.40    Sublease, dated May 1, 1994, between The Pacific Rim
           Assurance Company and Group Data Services, Incorporated(1)
           10.41 Office lease between L.A.X. Business Center and Pac
           Rim Holding Corporation dated June 1, 1995(1)...............
  10.42    Certificate of Authority from Department of Insurance, State
           of Arizona to transact the business of Casualty With
           Workers' Compensation Insurance(1)..........................
  10.43    Certificate of Authority from Department of Insurance, State
           of Texas to transact the business of casualty with workers'
           compensation insurance(1)...................................
  10.44    Sublease, dated August 15, 1995, between The Pacific Rim
           Assurance Company and the General Services
           Administration(1)...........................................
  10.45    Sales, License and Service Agreement, dated November 14,
           1995, between Macess Corporation and The Pacific Rim
           Assurance Company for equipment purchases, software license,
           and professional prepaid support and software
           maintenance(1)..............................................
  10.47    Certificate of Authority from the State of Georgia Office of
           Commissioner of Insurance, to transact the business of
           Property and Casualty (including Workers'
           Compensation)(1)............................................
  10.48    Producer agreement, dated May 15, 1996, between Regional
           Benefits Insurance Services, a subsidiary of Superior
           Pacific Casualty Company, and Hull & Co., Inc.(2)...........
  10.49    Producer agreement, dated May 15, 1996, between Regional
           Benefits Insurance Services, and Gulf Atlantic Management
           Group, Inc.(2)..............................................
  10.50    Office lease, dated May 20, 1996, between Gulf Atlantic
           Investment Group, Inc. and Regional Benefits Insurance
           Services, Inc.(2)...........................................
  10.51    Employment Agreement between Pac Rim Holding Corporation and
           Stanley Braun, dated April 15, 1994, as amended March 27,
           1995, and March 30, 1996(3).................................
  10.52    Third Amendment to Employment Agreement, dated as of April
           10, 1997, between Pac Rim Holding Corporation and Stanley
           Braun.++++..................................................
  10.53    Agreement for Services between REM and SNIC, relating to the
           Claim Severity Management Program(5)........................
  10.54    Average Existing Claim Severity Agreement, effective
           December 31, 1997, between ZRNA and Superior Pacific(5).....
</TABLE>
<PAGE>   244
 
<TABLE>
<CAPTION>
                                                                           SEQUENTIALLY
EXHIBIT                                                                      NUMBERED
NUMBER                       DESCRIPTION OF DOCUMENT                           PAGE
<C>        <S>                                                             <C>
  10.55    Lease, dated October 29, 1997, between Property California
           OB One Corporation and SNIC, relating to the lease of its
           Pleasanton, California, facility(5).........................
  10.56    Stock Purchase Agreement, dated as of May 5, 1998, among the
           Company, IP Delaware, IP Bermuda, and Capital Z Partners
           Ltd., with forms of a Registration Rights Agreement and
           Common Stock Purchase Warrant exercisable to purchase an
           aggregate of 734,000 shares of Common Stock attached as
           exhibits thereto(6).........................................
  10.57    Voting Agreement, dated as of May 5, 1998, between FHC and
           Insurance Partners, L.P.(6).................................
  10.58    Voting Agreement, dated as of May 5, 1998, between FHC and
           Insurance Partners Offshore (Bermuda), L.P.(6)..............
  10.59    Voting Agreement, dated as of May 5, 1998, between FHC and
           Mr. Thomas J. Jamieson(6)...................................
  10.60    Voting Agreement, dated as of May 5, 1998, between FHC and
           Jaco Oil Company(6).........................................
  10.61    Form of Voting Agreement, dated as of May 5, 1998, between
           FHC and the other parties set forth on the schedule attached
           thereto(6)..................................................
  10.62    Retainer and Consulting Agreement dated as of December 31,
           1997 between the Company, SNIC, SPCC, and REM...............
  10.63    Workers' Compensation Quota Share Large Account Business
           Reinsurance Contract, effective February 1, 1998, issued to
           the Company.................................................
  12       Computation of Ratio of Earnings to Fixed Charges and
           Preferred Dividends and EBITDA calculations.................
  21       Subsidiaries of the Company(4)..............................
  23.1     Consent of KPMG Peat Marwick LLP
  23.2     Consent of Deloitte & Touche LLP
  24       Power of Attorney (filed on page II-4 hereof)...............
  27.1     Financial Data Schedule -- Company -- Fiscal Year ended
           December 31, 1997(5)........................................
  27.2     Financial Data Schedule -- Company -- Quarter ended March
           31, 1997(6).................................................
  27.3     Financial Data Schedule -- BIG -- Fiscal Year ended December
           31, 1997....................................................
  27.4     Financial Data Schedule -- BIG -- Quarter ended March 31,
           1998........................................................
  27.5     Financial Data Schedule -- Pac Rim -- Fiscal Year ended
           December 31, 1996(7)........................................
  99.1     Form of Subscription Certificate to be used in the Rights
           Offering(8).................................................
  99.2     Subscription Certificate to be used in the Employee
           Participation(8)............................................
  99.3     Form of Employee Participation Agreement to be used in the
           Employee Participation(8)...................................
  99.4     Form of Stock Subscription Agreement to be used in the
           Employee Participation(8)...................................
  99.5     Form of Securities Pledge Agreement to be used in the
           Employee Participation(8)...................................
  99.6     Form of Promissory Note to be used in the Employee
           Participation(8)............................................
  99.7     Dealer Manager Agreement(8).................................
</TABLE>
 
- ------------------------------
*      Previously filed as an exhibit to the Company's Registration Statement on
       Form 10, as filed with the Securities and Exchange Commission ("SEC") on
       May 1, 1995 (File No. 0-25984).
 
**    Previously filed as an exhibit to Amendment No. 2 to the Company's
      Registration Statement on Form 10/A, as filed with the SEC on November 1,
      1995 (File No. 0-25984).
 
***   Previously filed as an exhibit to the Company's Annual Report on Form 10-K
      for the fiscal year ended December 31, 1995, as filed with the SEC on
      March 29, 1996.
<PAGE>   245
 
**** Previously filed as an exhibit to the Company's statement on Schedule 13D,
     as filed with the SEC on February 27, 1997.
 
+      Previously filed as an exhibit to the Company's Annual Report on Form
       10-K for the fiscal year ended December 31, 1996, as filed with the SEC
       on March 10, 1997.
 
++    Previously filed as an exhibit to the Company's Current Report on Form
      8-K, as filed with the SEC on April 24, 1997.
 
+++   Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended March 31, 1997, as filed with the SEC on May
      15, 1997.
 
++++  Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended June 30, 1997, as filed with the SEC on August
      14, 1997.
 
+++++ Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended September 30, 1997, as filed with the SEC on
      November 13, 1997.
 
(1)   Incorporated by reference from the Exhibits to the Annual Report on Form
      10-K of Pac Rim Holding Corporation for the year ended December 31, 1995.
 
(2)   Previously filed with the Quarterly Report on Form 10-Q of Pac Rim Holding
      Corporation, for the quarter ended June 30, 1996.
 
(3)   Previously filed as Exhibit K to Annex C of the Company's Proxy Statement
      on Schedule 14A dated March 10, 1997.
 
(4)   Previously filed as an exhibit to the Company's and the Trust's
      Registration Statement on Form S-4 (Registration No. 333-43505) on
      December 30, 1997.
 
(5)   Previously filed as an exhibit to the Company's Annual Report on Form 10-K
      for the fiscal year ended December 31, 1997, as filed with the SEC on
      March 31, 1998.
 
(6)   Previously filed as an exhibit to the Company's Quarterly Report on Form
      10-Q for the quarter ended March 31, 1998, as filed with the SEC on May
      15, 1998.
 
(7)   Previously filed as an exhibit to the Company's Current Report on Form
      8-K/A, as filed with the SEC on September 5, 1997.
 
(8)   To be filed by amendment.

<PAGE>   1
                                                                       Exhibit 5

                         (Riordan & McKinzie Letterhead)

                                  July 6, 1998

Superior National Insurance Group, Inc.
26601 Agoura Road
Calabasas, CA 91302

Ladies and Gentlemen:

         We have acted as counsel to Superior National Insurance Group, Inc., a
Delaware corporation (the "Company"), in connection with the registration under
the Securities Act of 1933, as amended, of the issuance and sale of 6,548,664
shares of the Company's common stock, par value $.01 per share (the "Common
Stock"), and 6,548,664 transferable subscription rights to purchase shares of
Common Stock (the "Rights"), pursuant to a Registration Statement on Form S-1
(Registration No. 333-_________), including the prospectus and all amendments,
exhibits and documents related thereto (collectively, the "Registration
Statement"), in accordance with the terms of the Registration Statement.

         Based upon our examination of the originals or copies of such
documents, corporate records, certificates of officers of the Company and other
instruments as we have deemed necessary and upon the laws as presently in
effect, we are of the opinion that (i) the Common Stock has been duly authorized
for issuance by the Company and, upon issuance, delivery and subscription and
payment in accordance with the terms of the Registration Statement, the Common
Stock will be validly issued, fully paid and nonassessable and (ii) the Rights
have been duly authorized for issuance by the Company and, upon issuance and
delivery in accordance with the terms of the Registration Statement, will be
legal, valid and binding obligations of the Company, subject to the effect of
applicable bankruptcy, insolvency, reorganization, moratorium and other laws
relating to, or affecting, creditors' rights and remedies generally and general
principles of equity (regardless of whether considered in a proceeding at law or
in equity.)

         We hereby consent to the incorporation by reference of this opinion as
an exhibit to the Registration Statement. We also consent to the reference to
Riordan & McKinzie under the caption "Legal Matters" in the Registration
Statement.

                                        Very truly yours,



                                        /s/ Riordan & McKinzie



<PAGE>   1
                                                                   EXHIBIT 10.62

                        RETAINER AND CONSULTING AGREEMENT


        Retainer and Consulting Agreement (this "Agreement") dated as of
December 31, 1997 between SUPERIOR NATIONAL INSURANCE GROUP, INC. ("Superior
Group"), a Delaware corporation having its principal place of business at 26601
Agoura Road, Calabasas, California 91302, SUPERIOR NATIONAL INSURANCE COMPANY
("Superior National"), a California corporation having its principal place of
business at 26601 Agoura Road, Calabasas, California 91302, and SUPERIOR PACIFIC
CASUALTY COMPANY ("Superior Pacific"), a California corporation having its
principal place of business at 6200 Canoga Avenue, Woodland Hills, California
91367-2402, on the one hand (Superior Group, Superior National and Superior
Pacific shall be referred to collectively as "SUPERIOR"), and RISK ENTERPRISE
MANAGEMENT LIMITED ("REM"), a Delaware corporation, having its principal place
of business at 59 Maiden Lane, New York, NY 10038, on the other hand. All of the
parties hereto shall be referred to individually as a "party" and collectively
as "parties."

                                   WITNESSETH:

        WHEREAS, SUPERIOR wishes to engage REM to provide certain consulting
services ("Services") in connection with the ownership and formation of a new
stock Delaware corporation formed exclusively for the purpose of administering
certain insurance claims of Superior, which company shall be named Comprehensive
Compensation Claims Management, Inc. ("3CM"), and REM is willing to perform such
Services for SUPERIOR, subject to the terms and conditions of this Agreement;
and

        WHEREAS, in consideration of the payment by SUPERIOR to REM of the fee
specified in this Agreement and the indemnification of REM under the Stock
Purchase, Indemnification, and Securityholders' Agreement (the "Stock Purchase
and Indemnification Agreement"), a copy of which is attached hereto as Exhibit
A, REM has agreed to hold seventy-five percent (75%) of the issued and
outstanding common stock of 3CM and to appoint directors of 3CM.

        NOW THEREFORE, in consideration of the foregoing recitals, payment of
the fees due hereunder, and the mutual promises and covenants contained herein,
the parties hereby agree as follows:


 
                                        
<PAGE>   2

                                    ARTICLE I
                                   ENGAGEMENT

        SUPERIOR hereby engages REM to provide Services to SUPERIOR, and REM
hereby accepts such engagement, all subject to and in accordance with the terms
and provisions of this Agreement.

        Neither this Agreement nor any transaction contemplated hereunder shall
be deemed to create any direct or indirect contractual or other relationship
between SUPERIOR and REM except as set forth herein or to create a partnership
or joint venture, affiliate, agency or similar relationship between SUPERIOR and
REM.

        REM and SUPERIOR reserve absolutely and without limitation their
respective rights to acquire, develop and engage, directly or indirectly, in any
business undertakings and opportunities for themselves or as agent for any
other.

                                   ARTICLE II
                               NATURE OF SERVICES

        The Services to be performed by REM under this Agreement at any time or
for any time period shall include any services performed by REM for SUPERIOR in
connection with 3CM and described in the Stock Purchase and Indemnification
Agreement and additional services performed by REM at the request of SUPERIOR.

                                   ARTICLE III
                            COMPENSATION AND EXPENSES

        3.1    Compensation and Expenses

        3.1.1 Simultaneously with execution of this Agreement, SUPERIOR shall
pay REM $507,500 in cash by wire transfer in accordance with the wire
instructions attached hereto as Exhibit B; and thereafter, on or before each
December 31 during the term of this Agreement, SUPERIOR shall pay an additional
$500,000 to REM without notice, demand or setoff of any kind. Such sums shall be
deemed fully earned by REM, not refundable and payable on these dates specified.

        3.1.2 ln addition to the amounts specified in paragraph 3.1.1, REM shall
invoice SUPERIOR at its then current hourly rates attributable to Services
performed under this Agreement plus Reimbursable Expenses, as defined herein.
Services shall include only those activities related to REM acting as
shareholder or its designees acting as directors of 3CM. For purposes of this
paragraph, REM hourly rates are total employee costs per hour, including salary,
benefits and overhead multiplied by 17.65%, the product of which is added to
employee costs per hour. Overhead includes rent, the costs of forms, supplies,
telephone,

 
                                        2

<PAGE>   3

postage and other corporate or administrative expenses relating to the services
so provided. "Reimbursable Expenses" are those which would normally be incurred
in the rendering or performance of Services. They include, but are not limited
to, any applicable data processing or telecommunications charges, temporary
personnel, hotel, travel, living and out-of-pocket expenses incurred by REM in
rendering services pursuant to this Agreement. The total amount of Services plus
Reimbursable Expenses charged under this paragraph shall not exceed $250,000 in
any calendar year unless SUPERIOR authorizes a higher amount in advance of such
costs being incurred.

        3.1.3 Additionally, If Superior requests REM to perform any of the
services described on Exhibit C attached hereto (the "Additional Services"),
SUPERIOR shall pay REM for any such Additional Services at the rates specified
on Exhibit C plus Reimbursable Expenses.

        3.2    Reporting: Timing of Payments

For Services performed by REM pursuant to paragraphs 3.1.2 and 3.1.3, REM shall
deliver a statement of services to SUPERIOR for such fees and Reimbursable
Expenses which shall describe, in reasonable detail, the nature of the Services
or the Additional Services provided and the Reimbursable Expenses incurred in
connection therewith. Superior shall make payment to REM pursuant to any such
statement of services within 30 days of receipt.

        3.3    Taxes

SUPERIOR shall be responsible to pay directly to the applicable taxing authority
or to REM, if imposed on REM, all federal, state and local taxes (other than net
income taxes) which REM may be required to pay or collect or which may be
incurred or assessed against REM, under any existing or future law, relating to
the sale, delivery, rendering or provision of Services or Additional Services by
REM.

                                   ARTICLE IV
                                 INDEMNIFICATION

        In connection with Services rendered by REM hereunder, SUPERIOR agrees
to hold harmless, defend, release and indemnify REM and REM lndemnitees (as
defined in and pursuant to Article VIII of the Stock Purchase and
Indemnification Agreement) and in the same manner as provided therein, which
indemnification is incorporated herein and made part hereof. The provisions of
this Section shall survive the termination of this Agreement.


 
                                        3

<PAGE>   4

                                    ARTICLE V
                              TERM AND TERMINATION

        5.1 Term. This Agreement shall commence on December 31, 1997 and shall
be valid for an indefinite period of time and may be terminated by either party
only in accordance with subsection 5.2 below.

        5.2    Termination.

        5.2.1 Superior may terminate this Agreement at any time upon 90 days
prior written notice to REM. The date of such termination shall be the date as
specified in such notice.

        5.2.2 REM may terminate this Agreement effective at any December 31 upon
90 days prior written notice to Superior. The date of such termination shall be
the December 31 date specified in such notice.

                                   ARTICLE VI
                                  MISCELLANEOUS

        6.1 Governing Law. This Agreement, its validity, formation and
interpretation and the rights and obligations of the parties arising under or in
connection with it shall be governed by, and construed and enforced in
accordance with, the laws of the State of New York, without regard to its
conflict of laws rules. Each party hereby irrevocably and unconditionally
consents to submit to the exclusive jurisdiction of the courts of the State of
New York and of the United States of America, in each case located in the County
of New York, for any litigation arising out of or relating to this Agreement
(and agrees not to commence any litigation relating thereto except in such
courts), and further agrees that service of any process, summons, notice or
document by United States registered mail to its respective address set forth in
the Agreement shall be effective service of process for any litigation brought
against it in any such court. Each party hereby irrevocably and unconditionally
waives any objection to the laying of venue of any litigation arising out of
this Agreement in the state of federal courts in the State of New York, and
hereby further irrevocably and unconditionally waives and agrees not to plead or
claim in any such court that any such litigation brought in any such court has
been brought in an inconvenient forum.

        6.2 Currency. All payments hereunder shall be made in United States
Dollars.

        6.3 Assignment. This Agreement may not be assigned by either party
without the prior written consent of the other party hereto except that SUPERIOR
may add as an additional party any regulated insurance subsidiary of Superior
National Insurance Group, Inc.

        6.4 Notices. Wherever under this Agreement one party is required or
permitted to give notice to the other, such notice shall be effected either by
personal delivery in writing or

 
                                              4

<PAGE>   5


by mail, registered or certified, postage prepaid, return receipt requested, to
the following addresses:

               If to SUPERIOR:      Superior National Insurance Company
                                    26601 Agoura Road
                                    Calabasas CA
                                    Attention: General Counsel

               If to REM:           Risk Enterprise Management Limited
                                    59 Maiden Lane
                                    New York, New York 10038
                                    Attention: General Counsel

        Each party to this Agreement may from time to time change the address to
which notices may be given by giving the other party written notice, in the
manner provided in this Subsection, of the new address and the date upon which
it will become effective. Notices delivered personally shall be deemed given
upon receipt; mailed notices shall be deemed given three business days after
mailing.

        6.5 Severability. If any provision of this Agreement is held to be void,
illegal or unenforceable under present or future laws effective during the term
hereof, such provision shall be fully severable and this Agreement shall be
construed and enforced as if such illegal, invalid or unenforceable provision
never comprised a part hereof, and the remaining provisions of this Agreement
shall remain in full force and effect and shall not be affected in any way by
the void, illegal or unenforceable provision or by its severance. Furthermore,
in lieu of such severed provision, there shall be added automatically as part of
this Agreement a provision as similar in its terms to such severed provision as
may be possible and be valid, legal and enforceable.

        6.6 Captions. The Section and Subsection captions contained in this
Agreement are for the convenience of reference only; such captions doe not
constitute any part of the agreement between the parties and shall not be
considered in the interpretation or construction of it.

        6.7 Entire Agreement: Amendments. This Agreement constitutes the entire
agreement between the parties with respect to its subject matter and supersedes
all prior written or oral agreements pertaining to such subject matter. This
Agreement may be modified or amended only by a written instrument signed by both
of the parties hereto.

        6.8 No third party rights. This Agreement shall be binding upon the
parties executing this Agreement and their respective successors. Nothing in
this Agreement is intended or shall be construed to give any person, other than
the persons referred to in this

 
                                        5

<PAGE>   6

Subsection 6.8, any legal or equitable right, remedy or claim under or in
respect of this Agreement or any provision contained herein.

        6.9 Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be considered an original, but all of which
taken together shall constitute one single agreement between the parties.

Executed and entered into as of the date first above written.

                                    SUPERIOR NATIONAL INSURANCE GROUP, INC.

                                    BY:   /s/ Chris Seaman
                                        ----------------------------------------

                                    ITS:  Chief Financial Officer
                                        ----------------------------------------

                                    SUPERIOR PACIFIC CASUALTY COMPANY

                                    BY:   /s/ Chris Seaman
                                        ----------------------------------------

                                    ITS:  Chief Financial Officer
                                        ----------------------------------------

                                    SUPERIOR NATIONAL INSURANCE COMPANY

                                    BY:   /s/ Chris Seaman
                                       -----------------------------------------

                                    ITS:  Chief Financial Officer
                                        ----------------------------------------

                                    RISK ENTERPRISE MANAGEMENT LIMITED

                                    BY:   /s/ Michael Riney
                                        ----------------------------------------

                                    ITS:  Executive Vice President
                                        ----------------------------------------


                                        6

<PAGE>   7

                                    EXHIBIT B

                           WIRE TRANSFER INSTRUCTIONS

        Bank:                       Risk Enterprise Management
                                    Citibank, NA
                                    399 Park Avenue
                                    New York, NY

        ABA#:                       021000089

        For the account of:         Risk Enterprise Management
        Account#:                   4067-5336

        Reference:                  Superior (National?) (Pacific?)

        Attention:                  S. Marcketta


 
                                        7

<PAGE>   8


                                    EXHIBIT C

                               ADDITIONAL SERVICES


Utilization of any of the following services shall be at the sole option of
Superior, provided however that Superior agrees that to the extent it acquires
such services, REM shall be its exclusive provider:

        1. Leakage Assessment Services, at $110 per hour including on-site
        evaluation and report time;

        2. Leakage Management Training Services, at $150.00 per hour;

        3. Managed Care Services, other than those outsourced to Prudential or
        other vendors currently under contract to Superior:



<TABLE>
<CAPTION>
                                                          Rate
                                                          ----
<S>                                                       <C>
         Early Intervention Nursing/Telephonic Case
           Management                                     $75 Per Hour

         Field Case Management Services                   $80 Per Hour

         Hospital Precertification                        $100 Per Assignment

         Utilization Review                               $100 Per Assignment
</TABLE>



                                        8



<PAGE>   1
                                                                   EXHIBIT 10.63

================================================================================



                        WORKERS' COMPENSATION QUOTA SHARE
                             LARGE ACCOUNT BUSINESS
                              REINSURANCE CONTRACT
                           EFFECTIVE: FEBRUARY 1, 1998

                                    issued to

                        Superior National Insurance Group
                              Calabasas, California














                                 E.W Blanch Co.

                              Reinsurance Services

                             3500 West 80th Street

                          Minneapolis, Minnesota 55431



================================================================================

<PAGE>   2

================================================================================



                        WORKERS' COMPENSATION QUOTA SHARE
                             LARGE ACCOUNT BUSINESS
                              REINSURANCE CONTRACT
                           EFFECTIVE: FEBRUARY 1, 1998

                                    issued to

                        Superior National Insurance Group
                              Calabasas, California





<TABLE>
<CAPTION>

              REINSURER                                           PARTICIPATION

<S>                                                               <C>   
WEB Management LLC (for and on behalf of
  All American Life Insurance Company)                                100.0%

TOTAL                                                                 100.0%
</TABLE>





                                E. W. Blanch Co.

                              Reinsurance Services

                              3500 West 80th Street

                          Minneapolis, Minnesota 55431



================================================================================

<PAGE>   3

================================================================================



                       INTERESTS AND LIABILITIES AGREEMENT

                                       of

                       All American Life Insurance Company
                                Chicago, Illinois
                                       by
                               WEB Management LLC
                             Bloomfield, Connecticut
            (hereinafter referred to as the "Subscribing Reinsurer")

                               with respect to the

                        WORKERS' COMPENSATION QUOTA SHARE
                             LARGE ACCOUNT BUSINESS
                              REINSURANCE CONTRACT
                           EFFECTIVE: FEBRUARY 1, 1998

                         issued to and duly executed by

                        Superior National Insurance Group
                              Calabasas, California



The Subscribing Reinsurer hereby accepts a 100.0% share in the interests and
liabilities of the "Reinsurer" as set forth in the attached Contract captioned
above.

This Agreement shall become effective at 12:01 a.m., Local Standard Time at the
location of the risk, February 1, 1998, and shall continue in force until 12:01
a.m., Local Standard Time at the location of the risk, February 1, 1999.

The Subscribing Reinsurer's share in the attached Contract shall be separate and
apart from the shares of the other reinsurers, and shall not be joint with the
shares of the other reinsurers, it being understood that the Subscribing
Reinsurer shall in no event participate in the interests and liabilities of the
other reinsurers.

IN WITNESS WHEREOF, the Subscribing Reinsurer by its duly authorized
representative has executed this Agreement as of the date undermentioned at:

Bloomfield, Connecticut,this _______ day of _____________________________199___.

                             ---------------------------------------------------
                             WEB Management LLC (for and on behalf of All 
                             American Life Insurance Company)


                                                                 E.W. BLANCH CO.
================================================================================
                                                            Reinsurance Services
<PAGE>   4

================================================================================



                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

ARTICLE                                                                     PAGE
- -------                                                                     ----

<S>                                                                          <C>
            Preamble                                                          1
     I      Classes of Business Reinsured                                     1
    II      Term                                                              2
   III      Territory                                                         2
    IV      Exclusions                                                        2
     V      Retention and Limit                                               5
    VI      Loss in Excess of Policy Limits/ECO                               5
   VII      Definitions                                                       6
  VIII      Losses and Loss Adjustment Expense                                6
    IX      Salvage and Subrogation                                           7
     X      Original Conditions                                               7
    XI      Ceding Commission                                                 7
   XII      Contingent Commission                                             7
  XIII      Reports and Remittances                                           8
   XIV      Loss Reporting (Sunset Clause)                                    9
    XV      Offset (BRMA 36C)                                                 9
   XVI      Access to Records  (BRMA 1C)                                      9
  XVII      Errors and Omissions                                             10
 XVIII      Taxes (BRMA 50B)                                                 10
   XIX      Federal Excise Tax (BRMA 17A)                                    10
    XX      Currency (BRMA 12A)                                              10
   XXI      Unauthorized Reinsurance                                         10
  XXII      Insolvency                                                       12
 XXIII      Arbitration (BRMA 6J)                                            13
  XXIV      Controlling Law                                                  14
   XXV      Service of Suit (BRMA 49C)                                       14
  XXVI      Savings Clause                                                   15
 XXVII      Intermediary (BRMA 23A)                                          15
</TABLE>



                                                                 E.W. BLANCH CO.
================================================================================
                                                            Reinsurance Services

<PAGE>   5

================================================================================



                        WORKERS' COMPENSATION QUOTA SHARE
                             LARGE ACCOUNT BUSINESS
                              REINSURANCE CONTRACT
                           EFFECTIVE: FEBRUARY 1, 1998

                                    issued to

                        Superior National Insurance Group
                              Calabasas, California
                   (hereinafter referred to as the "Company")

                                       by

                   The Subscribing Reinsurer(s) Executing the
                     Interests and Liabilities Agreement(s)
                                Attached Hereto
                  (hereinafter referred to as the "Reinsurer")



PREAMBLE

The Superior National Insurance Group shall refer collectively to Superior
National Insurance Company and Superior Pacific Casualty Company, both of
Calabasas, California (and any member companies of the Superior National
Insurance Group which may hereafter be added).


ARTICLE I - CLASSES OF BUSINESS REINSURED

A.    By this Contract the Company obligates itself to cede to the Reinsurer and
      the Reinsurer obligates itself to accept quota share reinsurance of the
      Company's net liability under policies, contracts and binders of insurance
      or reinsurance (hereinafter called "policies") in force at the effective
      date hereof or issued or renewed on or after that date, and classified by
      the Company as Large Account Business (as defined in Article VII) covering
      all business written and classified by the Company as Workers'
      Compensation Insurance for statutory limits as required by the States of
      Arizona and California.

B.    The liability of the Reinsurer with respect to each cession hereunder
      shall commence obligatorily and simultaneously with that of the Company,
      subject to the terms, conditions and limitations hereinafter set forth.



                                                                 E.W. BLANCH CO.
================================================================================
                                                            Reinsurance Services
                                                                          Page 1

<PAGE>   6

================================================================================



ARTICLE II - TERM

A.    This Contract shall become effective at 12:01 a.m., Local Standard Time at
      the location of the risk, February 1, 1998, with respect to losses arising
      out of occurrences commencing on or after that time and date, and shall
      remain in force until 12:01 a.m., Local Standard Time at the location of
      the risk, February 1, 1999.

B.    Unless the Company elects to reassume the ceded unearned premium in force
      on the effective date of expiration, and so notifies the Reinsurer prior
      to or as promptly as possible after the effective date of expiration,
      reinsurance hereunder on business in force on the effective date of
      expiration shall remain in full force and effect until expiration,
      cancellation or next premium anniversary of such business, whichever first
      occurs, but in no event beyond 12 months plus odd time (not exceeding 18
      months in all) following the effective date of expiration.

C.    Notwithstanding the expiration of this Contract as provided herein, the
      provisions of this Contract shall continue to apply to all unfinished
      business hereunder to the end that all obligations and liabilities
      incurred by each party hereunder prior to such expiration shall be fully
      performed and discharged.


ARTICLE III - TERRITORY

This Contract shall apply to policies issued in the United States of America
covering risks written in the States of Arizona and California.


ARTICLE IV - EXCLUSIONS

A.    This Contract does not apply to and specifically excludes the following
      business or risks, regardless of the type of policy issued by the Company:

      1.    Aggregate Excess Workers' Compensation.

      2.    Risks of which the flying hazard is the major part.

      3.    All reinsurance assumed other than reinsurance which covers business
            underwritten by the Company.

      4.    Policies issued through ZC Insurance Company, and policies issued
            with a Zurich Re (or affiliate) Assumption of Liability Endorsement.

      5.    Any loss or liability accruing to the Company directly or indirectly
            from any insurance written by or through any pool or association,
            including pools or associations in which membership by the Company
            is required under any statutes or regulations and including 



                                                                 E.W. BLANCH CO.
================================================================================
                                                            Reinsurance Services
                                                                          Page 2

<PAGE>   7

================================================================================



            voluntary or involuntary market assistance programs; however, this
            exclusion shall not apply to the Company's involuntary participation
            in assigned risk plans insofar as the line of business is one
            written by the Company.

      6.    All liability of the Company arising by contract, operation of law,
            or otherwise, from its participation or membership, whether
            voluntary or involuntary, in any insolvency fund. "Insolvency fund"
            includes any guaranty fund, insolvency fund, plan, pool,
            association, fund or other arrangement, however denominated,
            established or governed, which provides for any assessment of or
            payment or assumption by the Company of part or all of any claim,
            debt, charge, fee or other obligation of an insurer, or its
            successors or assigns, which has been declared by any competent
            authority to be insolvent, or which is otherwise deemed unable to
            meet any claim, debt, charge, fee or other obligation in whole or in
            part.

      7.    War risks as excluded by War Risks Exclusion Clause appearing in
            subject original policies.

      8.    Operations employing the process of nuclear fission or fusion or
            handling radioactive material, which operations include but are not
            limited to:

            a.    The use of nuclear reactors such as atomic piles, particle
                  accelerators or generators; or

            b.    The use, handling or transportation of radioactive materials;
                  or

            c.    The use, handling or transportation of any weapon of war or
                  explosive device employing nuclear fission or fusion.

            The preceding exclusions (a), (b) and (c) do not apply to:

                  i.    The exclusive use of particle accelerators incidental to
                        ordinary industrial or educational research pursuits; or

                  ii.   The exclusive use, handling or transportation of radio
                        isotopes for medical or industrial use; or

                  iii.  Radium or radium compounds.

      9.    Insurance covering the following:

            a.    Commercial airlines;

            b.    Employers Liability.


                                                                 E.W. BLANCH CO.
================================================================================
                                                            Reinsurance Services
                                                                          Page 3

<PAGE>   8

================================================================================



B.    This Contract does not apply to and specifically excludes the following
      operations when carried on as the principal operation of the original
      insured:

      1.    Wrecking or demolition of buildings.

      2.    Underground mining operations.

      3.    Subway construction.

      4.    Subaqueous work.

      5.    Construction of tunnels or construction of new bridges and dams in
            excess of 100 feet in length.

      6.    Offshore and onshore gas and oil drilling operations, except for
            operations conducted in Kern County, California.

      7.    Manufacture, production, refining or processing of natural or
            artificial fuel gases, butane, propane or liquefied petroleum gases
            or gasoline.

      8.    Manufacture (or the loading into containers) of any explosive
            substance intended for use as an explosive and any product in which
            any explosive substance is an ingredient, and the handling,
            transportation or storage thereof.

            (Note: An "explosive" is defined as any substance manufactured for
            the express purpose of exploding as differentiated from other
            commodities used industrially and which are only incidentally
            explosive, such as gasoline, fuel gases and dyestuffs.)

      9.    Storage, mining, handling, manufacturing, transport, distribution,
            sale, installation or removal of asbestos products.

C.    The above exclusions shall not apply as respects any liability of the
      Company resulting from the assignment of individual policies from an
      Assigned Risk Plan or similar facility. In no event, however, shall the
      above Assigned Risk provision apply to the exclusions in paragraph A of
      this Article.

D.    In the event of the Company being bound without its knowledge on a risk
      excluded from the protection of this Contract either by an existing
      insured extending its operations or by an inadvertent acceptance or
      otherwise, it is agreed that the Company shall be reinsured to the same
      extent as if there were no exclusion, but only until discovery by a member
      of the Company's Home Office Underwriting Department and for 30 days
      thereafter. In no event, however, shall the above binder provision apply
      to the exclusions in paragraph A of this Article.



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E.    Notwithstanding the foregoing, any reinsurance falling within the scope of
      one or more of the exclusions set forth above that is specially accepted
      by the Reinsurer from the Company shall be covered under this Contract and
      be subject to the terms hereof, except as such terms shall be modified by
      the special acceptance.


ARTICLE V - RETENTION AND LIMIT

A.    As respects business subject to this Contract, the Company shall cede to
      the Reinsurer and the Reinsurer agrees to accept 100% of the Company's net
      liability.

B.    The Company shall purchase or be deemed to have purchased inuring
      reinsurance to limit its loss subject hereto from any one occurrence
      (inclusive of loss in excess of policy limits, extra contractual
      obligations and loss adjustment expense) to $500,000.


ARTICLE VI - LOSS IN EXCESS OF POLICY LIMITS/ECO

A.    In the event the Company pays or is held liable to pay an amount of loss
      in excess of its policy limit, but otherwise within the terms of its
      policy (hereinafter called "loss in excess of policy limits") or any
      punitive, exemplary, compensatory or consequential damages, other than
      loss in excess of policy limits (hereinafter called "extra contractual
      obligations") because of alleged or actual bad faith or negligence on its
      part in rejecting a settlement within policy limits, or in discharging its
      duty to defend or prepare the defense in the trial of an action against
      its policyholder, or in discharging its duty to prepare or prosecute an
      appeal consequent upon such an action, or in otherwise handling a claim
      under a policy subject to this Contract, the loss in excess of policy
      limits and/or the extra contractual obligations shall be added to the
      Company's loss, if any, under the policy involved, and the sum thereof
      shall be subject to the provisions of Article V. However, the extra
      contractual obligations coverage afforded hereunder shall not apply unless
      the Company counsels with the Reinsurer and secures the Reinsurer's
      written concurrence with respect to the actions to be taken to defend or
      control the action against the Company prior to or at the time of the
      trial which results in the loss in excess of policy limits or, if there is
      no claim for loss in excess of policy limits, promptly following the
      Company's first knowledge of an action against it alleging negligence or
      bad faith.

B.    An extra contractual obligation shall be deemed to have occurred on the
      same date as the loss covered or alleged to be covered under the policy.

C.    Notwithstanding anything stated herein, this Contract shall not apply to
      any loss in excess of policy limits or any extra contractual obligation
      incurred by the Company as a result of any fraudulent and/or criminal act
      by any officer or director of the Company acting individually or
      collectively or in collusion with any individual or corporation or any
      other organization or party involved in the presentation, defense or
      settlement of any claim covered hereunder.



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D.    Recoveries from any form of insurance or reinsurance which protects the
      Company against claims the subject matter of this Article shall inure to
      the benefit of this Contract.


ARTICLE VII - DEFINITIONS

A.    The term "net liability" as used herein means the remaining portion of the
      Company's gross liability on each risk reinsured under this Contract after
      deducting recoveries from all reinsurance, other than the reinsurance
      provided hereunder.

B.    The term "large account business" as used herein means policies of the
      Company generating an estimated annualized premium volume at the inception
      of the original policy of $100,000 or greater as calculated by the
      Company.

C.    The term "policies" as used herein means the Company's binders, policies
      and contract providing insurance and reinsurance on the business covered
      under this Contract. A policy written on an installment premium, reporting
      form or continuous basis shall be considered renewed as of the end of each
      annual period commencing with the inception date of the policy.

D.    The term "loss adjustment expense" means all costs and expenses assignable
      to a specific claim that are incurred by the Company in the investigation,
      appraisal, adjustment, settlement, litigation, defense or appeal of a
      specific claim, including court costs and costs of supersedeas and appeal
      bonds, regardless of how such expenses are classified for statutory
      reporting purposes. Loss adjustment expense shall include 1) prejudgment
      interest, unless included as part of the award or judgment; 2)
      postjudgment interest; 3) legal expenses and costs incurred in connection
      with coverage questions and legal actions connected thereto; and 4) a pro
      rata share of salaries and expenses of Company field employees, and
      expenses of other Company employees who have been temporarily diverted
      from their normal and customary duties and assigned to the field
      adjustment of losses covered by this Contract. Loss adjustment expense
      does not include salaries and expenses of employees, other than (4) above,
      and office and other overhead expenses.


ARTICLE VIII - LOSSES AND LOSS ADJUSTMENT EXPENSE

A.    Losses shall be reported by the Company in summary form as mutually
      agreed. The Reinsurer shall have the right to participate, at its own
      expense, in the defense or control of any claim or suit or proceeding
      involving this reinsurance.

B.    All loss settlements made by the Company, whether under strict policy
      conditions or by way of compromise, shall be unconditionally binding upon
      the Reinsurer, and the Reinsurer agrees to pay or allow, as the case may
      be, its proportion of each such settlement in accordance with Article
      XIII.



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C.    In the event of payment of a claim under a policy subject hereto, the
      Reinsurer shall be liable for its proportionate share of loss adjustment
      expense incurred by or on behalf of the Company in connection therewith
      and shall be credited with its proportionate share of any recoveries of
      such expense.


ARTICLE IX - SALVAGE AND SUBROGATION

The Reinsurer shall be credited with its proportionate share of salvage (i.e.,
reimbursement obtained or recovery made by the Company, less the actual cost,
excluding salaries of officials and employees of the Company and sums paid to
attorneys as retainer, of obtaining such reimbursement or making such recovery)
on account of claims and settlements involving reinsurance hereunder. The
Company hereby agrees to enforce its rights to salvage or subrogation relating
to any loss, a part of which loss was sustained by the Reinsurer, and to
prosecute all claims arising out of such rights.


ARTICLE X - ORIGINAL CONDITIONS

A.    All reinsurance under this Contract shall be subject to the same rates,
      terms, conditions, waivers and interpretations and to the same
      modifications and alterations as the respective policies of the Company.
      However, in no event shall this be construed in any way to provide
      coverage outside the terms and conditions set forth in this Contract. The
      Reinsurer shall be credited with its exact proportion of the gross
      premiums received by the Company, including disbursement of any dividends
      and return premiums, if any.

B.    Nothing herein shall in any manner create any obligations or establish any
      rights against the Reinsurer in favor of any third party or any persons
      not parties to this Contract.


ARTICLE XI - CEDING COMMISSION

A.    The Reinsurer shall allow the Company a 35.0% commission on all original
      gross premiums ceded to the Reinsurer hereunder. The Company shall allow
      the Reinsurer return commission on return premiums at the same rate.

B.    It is expressly agreed that the ceding commission allowed the Company
      includes provision for all commissions, taxes, assessments, and all other
      expenses of whatever nature, except loss adjustment expense.


ARTICLE XII - CONTINGENT COMMISSION

A.    The Reinsurer shall pay the Company a contingent commission equal to 25.0%
      of the net profit, if any, accruing to the Reinsurer under this Contract.
      The Reinsurer's net profit under 



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      this Contract shall be calculated in accordance with the following
      formula, it being understood that a positive balance equals net profit and
      a negative balance equals net loss:

      1.    Premiums earned for the term of this Contract; less

      2.    Ceding commission allowed on (1) above; less

      3.    Expenses incurred by the Reinsurer at 17.5% of premiums earned for
            the term of this Contract period; less

      4.    Losses incurred for the term of this Contract.

B.    The Company shall calculate and report the Reinsurer's net profit within
      60 days after the expiration of this Contract, and within 60 days after
      the end of each 12-month period thereafter until all losses subject hereto
      have been finally settled. Each such calculation for the term of this
      Contract shall be based on cumulative transactions hereunder from
      effective date of this Contract through the date of calculation. As
      respects the initial calculation referred to above, any contingent
      commission shown to be due the Company shall be paid by the Reinsurer as
      promptly as possible after receipt and verification of the Company's
      report. As respects each recalculation, any additional contingent
      commission shown to be due the Company shall be paid by the Reinsurer as
      promptly as possible after receipt and verification of the Company's
      report. Any return contingent commission shown to be due the Reinsurer
      shall be paid by the Company with its report.

C.    "Premiums earned" as used herein shall mean ceded unearned premiums at the
      effective date of this Contract, plus ceded net written premiums during
      the term of this Contract, less ceded unearned premiums at the expiration
      of this Contract.

D.    "Losses incurred" as used herein shall mean ceded losses and loss
      adjustment expense paid as of the effective date of calculation, plus the
      ceded reserves for losses and loss adjustment expense outstanding as of
      the same date, all as respects losses arising out of occurrences
      commencing during the term of this Contract.


ARTICLE XIII - REPORTS AND REMITTANCES

A.    As promptly as possible after the effective date of this Contract, the
      Company shall remit the Reinsurer's share of the unearned premium (less
      commission thereon) applicable to subject business in force at the
      effective date of this Contract.

B.    Within 60 days after the end of each month, the Company shall report to
      the Reinsurer:

      1.    Ceded gross premiums for the month, including disbursement of
            dividends and return premiums, if any;



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      2.    Ceding commission thereon;

      3.    Cost of inuring reinsurance;

      4.    Ceded losses and loss adjustment expense paid during the month;

      5.    Ceded unearned premium and ceded outstanding loss reserves as of the
            end of the month.

      The positive balance of (1) less (2) less (3) less (4) shall be remitted
      by the Company with its report. Any balance shown to be due the Company
      shall be remitted by the Reinsurer as promptly as possible after receipt
      and verification of the Company's report. It is understood that premium
      hereunder is payable as received by the Company on monthly billed
      policies.

C.    Annually, the Company shall furnish the Reinsurer with such information as
      the Reinsurer may require to complete its Annual Convention Statement.


ARTICLE XIV - LOSS REPORTING (SUNSET CLAUSE)

Within ten years after the expiration of this Contract (or after the expiration
of the final original policy, if the Company has purchased runoff coverage), the
Company shall advise the Reinsurer of any outstanding claims and/or occurrences
(hereinafter referred to as "Claim") hereunder which have not been finally
settled and which may cause a recovery under this Contract, and no liability
shall attach hereunder for any claim not reported to the Reinsurer within this
ten-year period.

ARTICLE XV - OFFSET (BRMA 36C)

The Company and the Reinsurer shall have the right to offset any balance or
amounts due from one party to the other under the terms of this Contract. The
party asserting the right of offset may exercise such right any time whether the
balances due are on account of premiums or losses or otherwise.


ARTICLE XVI - ACCESS TO RECORDS  (BRMA 1C)

The Company shall place at the disposal of the Reinsurer at all reasonable
times, and the Reinsurer shall have the right to inspect through its designated
representatives, during the term of this Contract and thereafter, all books,
records and papers of the Company in connection with any reinsurance hereunder,
or the subject matter hereof.



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ARTICLE XVII - ERRORS AND OMISSIONS

Except for the "sunset" provisions of Article XIV, inadvertent delays, errors or
omissions made in connection with this Contract or any transaction hereunder
shall not relieve either party from any liability which would have attached had
such delay, error or omission not occurred, provided always that such error or
omission is rectified as soon as possible after discovery.


ARTICLE XVIII - TAXES (BRMA 50B)

In consideration of the terms under which this Contract is issued, the Company
will not claim a deduction in respect of the premium hereon when making tax
returns, other than income or profits tax returns, to any state or territory of
the United States of America or the District of Columbia.


ARTICLE XIX - FEDERAL EXCISE TAX (BRMA 17A)

(Applicable to those reinsurers, excepting Underwriters at Lloyd's London and
other reinsurers exempt from Federal Excise Tax, who are domiciled outside the
United States of America.)

A.    The Reinsurer has agreed to allow for the purpose of paying the Federal
      Excise Tax the applicable percentage of the premium payable hereon (as
      imposed under Section 4371 of the Internal Revenue Code) to the extent
      such premium is subject to the Federal Excise Tax.

B.    In the event of any return of premium becoming due hereunder the Reinsurer
      will deduct the applicable percentage from the return premium payable
      hereon and the Company or its agent should take steps to recover the tax
      from the United States Government.


ARTICLE XX - CURRENCY (BRMA 12A)

A.    Whenever the word "Dollars" or the "$" sign appears in this Contract, they
      shall be construed to mean United States Dollars and all transactions
      under this Contract shall be in United States Dollars.

B.    Amounts paid or received by the Company in any other currency shall be
      converted to United States Dollars at the rate of exchange at the date
      such transaction is entered on the books of the Company.


ARTICLE XXI - UNAUTHORIZED REINSURANCE

A.    As regards policies or bonds issued by the Company coming within the scope
      of this Contract, the Company agrees that when it shall file with the
      insurance regulatory authority or set up on its books reserves for
      unearned premium and losses covered hereunder which it 



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      shall be required by law to set up, it will forward to the Reinsurer a
      statement showing the proportion of such reserves which is applicable to
      the Reinsurer. The Reinsurer hereby agrees to fund such reserves in
      respect of unearned premium, known outstanding losses that have been
      reported to the Reinsurer and loss adjustment expense relating thereto,
      losses and loss adjustment expense paid by the Company but not recovered
      from the Reinsurer, plus reserves for losses incurred but not reported, as
      shown in the statement prepared by the Company (hereinafter referred to as
      "Reinsurer's Obligations") by funds withheld, cash advances, funds on
      deposit or a Letter of Credit as required by the applicable insurance
      regulatory authorities to comply with state licensing requirements,
      including California Special Schedule P. The Reinsurer shall have the
      option of determining the method of funding provided it is acceptable to
      the insurance regulatory authorities having jurisdiction over the
      Company's reserves.

B.    When funding by a Letter of Credit, the Reinsurer agrees to apply for and
      secure timely delivery to the Company of a clean, irrevocable and
      unconditional Letter of Credit issued by a bank and containing provisions
      acceptable to the insurance regulatory authorities having jurisdiction
      over the Company's reserves in an amount equal to the Reinsurer's
      proportion of said reserves. Such Letter of Credit shall be issued for a
      period of not less than one year, and shall be automatically extended for
      one year from its date of expiration or any future expiration date unless
      30 days (60 days where required by insurance regulatory authorities) prior
      to any expiration date the issuing bank shall notify the Company by
      certified or registered mail that the issuing bank elects not to consider
      the Letter of Credit extended for any additional period.

C.    The Reinsurer and Company agree that the Letters of Credit provided by the
      Reinsurer pursuant to the provisions of this Contract may be drawn upon at
      any time, notwithstanding any other provision of this Contract, and be
      utilized by the Company or any successor, by operation of law, of the
      Company including, without limitation, any liquidator, rehabilitator,
      receiver or conservator of the Company for the following purposes, unless
      otherwise provided for in a separate Trust Contract:

      1.    To reimburse the Company for the Reinsurer's Obligations, the
            payment of which is due under the terms of this Contract and which
            has not been otherwise paid;

      2.    To make refund of any sum which is in excess of the actual amount
            required to pay the Reinsurer's Obligations under this Contract;

      3.    To fund an account with the Company for the Reinsurer's Obligations.
            Such cash deposit shall be held in an interest bearing account
            separate from the Company's other assets, and interest thereon not
            in excess of the prime rate shall accrue to the benefit of the
            Reinsurer;

      4.    To pay the Reinsurer's share of any other amounts the Company claims
            are due under this Contract.



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      In the event the amount drawn by the Company on any Letter of Credit is in
      excess of the actual amount required for (1) or (3), or in the case of
      (4), the actual amount determined to be due, the Company shall promptly
      return to the Reinsurer the excess amount so drawn. All of the foregoing
      shall be applied without diminution because of insolvency on the part of
      the Company or the Reinsurer.

D.    The issuing bank shall have no responsibility whatsoever in connection
      with the propriety of withdrawals made by the Company or the disposition
      of funds withdrawn, except to ensure that withdrawals are made only upon
      the order of properly authorized representatives of the Company.

E.    At annual intervals, or more frequently as agreed but never more
      frequently than quarterly, the Company shall prepare a specific statement
      of the Reinsurer's Obligations, for the sole purpose of amending the
      Letter of Credit, in the following manner:

      1.    If the statement shows that the Reinsurer's Obligations exceed the
            balance of credit as of the statement date, the Reinsurer shall,
            within 30 days after receipt of notice of such excess, secure
            delivery to the Company of an amendment to the Letter of Credit
            increasing the amount of credit by the amount of such difference.

      2.    If, however, the statement shows that the Reinsurer's Obligations
            are less than the balance of credit as of the statement date, the
            Company shall, within 30 days after receipt of written request from
            the Reinsurer, release such excess credit by agreeing to secure an
            amendment to the Letter of Credit reducing the amount of credit
            available by the amount of such excess credit.


ARTICLE XXII - INSOLVENCY

A.    In the event of the insolvency of one or more of the reinsured companies,
      this reinsurance shall be payable directly to the company or to its
      liquidator, receiver, conservator or statutory successor immediately upon
      demand, with reasonable provision for verification, on the basis of the
      liability of the company without diminution because of the insolvency of
      the company or because the liquidator, receiver, conservator or statutory
      successor of the company has failed to pay all or a portion of any claim.
      It is agreed, however, that the liquidator, receiver, conservator or
      statutory successor of the company shall give written notice to the
      Reinsurer of the pendency of a claim against the company indicating the
      policy or bond reinsured which claim would involve a possible liability on
      the part of the Reinsurer within a reasonable time after such claim is
      filed in the conservation or liquidation proceeding or in the
      receivership, and that during the pendency of such claim, the Reinsurer
      may investigate such claim and interpose, at its own expense, in the
      proceeding where such claim is to be adjudicated, any defense or defenses
      that it may deem available to the company or its liquidator, receiver,
      conservator or statutory successor. The expense thus incurred by the
      Reinsurer shall be chargeable, subject to the approval of the Court,
      against the company as part of the expense



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      of conservation or liquidation to the extent of a pro rata share of the
      benefit which may accrue to the company solely as a result of the defense
      undertaken by the Reinsurer.

B.    Where two or more reinsurers are involved in the same claim and a majority
      in interest elect to interpose defense to such claim, the expense shall be
      apportioned in accordance with the terms of this Contract as though such
      expense had been incurred by the company.

C.    It is further understood and agreed that, in the event of the insolvency
      of one or more of the reinsured companies, the reinsurance under this
      Contract shall be payable directly by the Reinsurer to the company or to
      its liquidator, receiver or statutory successor, except as provided by
      Section 4118(a) of the New York Insurance Law or except (1) where this
      Contract specifically provides another payee of such reinsurance in the
      event of the insolvency of the company or (2) where the Reinsurer with the
      consent of the direct insured or insureds has assumed such policy
      obligations of the company as direct obligations of the Reinsurer to the
      payees under such policies and in substitution for the obligations of the
      company to such payees.


ARTICLE XXIII - ARBITRATION (BRMA 6J)

A.    As a condition precedent to any right of action hereunder, in the event of
      any dispute or difference of opinion hereafter arising with respect to
      this Contract, it is hereby mutually agreed that such dispute or
      difference of opinion shall be submitted to arbitration. One Arbiter shall
      be chosen by the Company, the other by the Reinsurer, and an Umpire shall
      be chosen by the two Arbiters before they enter upon arbitration, all of
      whom shall be active or retired disinterested executive officers of
      insurance or reinsurance companies or Lloyd's London Underwriters. In the
      event that either party should fail to choose an Arbiter within 30 days
      following a written request by the other party to do so, the requesting
      party may choose two Arbiters who shall in turn choose an Umpire before
      entering upon arbitration. If the two Arbiters fail to agree upon the
      selection of an Umpire within 30 days following their appointment, each
      Arbiter shall nominate three candidates within 10 days thereafter, two of
      whom the other shall decline, and the decision shall be made by drawing
      lots.

B.    Each party shall present its case to the Arbiters within 30 days following
      the date of appointment of the Umpire. The Arbiters shall consider this
      Contract as an honorable engagement rather than merely as a legal
      obligation and they are relieved of all judicial formalities and may
      abstain from following the strict rules of law. The decision of the
      Arbiters shall be final and binding on both parties; but failing to agree,
      they shall call in the Umpire and the decision of the majority shall be
      final and binding upon both parties. Judgment upon the final decision of
      the Arbiters may be entered in any court of competent jurisdiction.

C.    If more than one reinsurer is involved in the same dispute, all such
      reinsurers shall constitute and act as one party for purposes of this
      Article and communications shall be made by the Company to each of the
      reinsurers constituting one party, provided, however, that nothing 



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      herein shall impair the rights of such reinsurers to assert several,
      rather than joint, defenses or claims, nor be construed as changing the
      liability of the reinsurers participating under the terms of this Contract
      from several to joint.

D.    Each party shall bear the expense of its own Arbiter, and shall jointly
      and equally bear with the other the expense of the Umpire and of the
      arbitration. In the event that the two Arbiters are chosen by one party,
      as above provided, the expense of the Arbiters, the Umpire and the
      arbitration shall be equally divided between the two parties.

E.    Any arbitration proceedings shall take place at a location mutually agreed
      upon by the parties to this Contract, but notwithstanding the location of
      the arbitration, all proceedings pursuant hereto shall be governed by the
      law of the state in which the Company has its principal office.


ARTICLE XXIV - CONTROLLING LAW

This Contract shall be interpreted in all respects in accordance with the laws
of the State of California.


ARTICLE XXV - SERVICE OF SUIT (BRMA 49C)

(Applicable if the Reinsurer is not domiciled in the United States of America,
and/or is not authorized in any State, Territory or District of the United
States where authorization is required by insurance regulatory authorities)

A.    It is agreed that in the event the Reinsurer fails to pay any amount
      claimed to be due hereunder, the Reinsurer, at the request of the Company,
      will submit to the jurisdiction of a court of competent jurisdiction
      within the United States. Nothing in this Article constitutes or should be
      understood to constitute a waiver of the Reinsurer's rights to commence an
      action in any court of competent jurisdiction in the United States, to
      remove an action to a United States District Court, or to seek a transfer
      of a case to another court as permitted by the laws of the United States
      or of any state in the United States.

B.    Further, pursuant to any statute of any state, territory or district of
      the United States which makes provision therefor, the Reinsurer hereby
      designates the party named in its Interests and Liabilities Agreement, or
      if no party is named therein, the Superintendent, Commissioner or Director
      of Insurance or other officer specified for that purpose in the statute,
      or his successor or successors in office, as its true and lawful attorney
      upon whom may be served any lawful process in any action, suit or
      proceeding instituted by or on behalf of the Company or any beneficiary
      hereunder arising out of this Contract.



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ARTICLE XXVI - SAVINGS CLAUSE

If any law or regulation of the federal, state or local government of any
jurisdiction in which the Company is doing business shall render illegal any of
the arrangements made in this Contract, that portion of this Contract is hereby
terminated insofar as it applies to such jurisdiction.


ARTICLE XXVII - INTERMEDIARY (BRMA 23A)

E. W. Blanch Co. is hereby recognized as the Intermediary negotiating this
Contract for all business hereunder. All communications (including but not
limited to notices, statements, premium, return premium, commissions, taxes,
losses, loss adjustment expense, salvages and loss settlements) relating thereto
shall be transmitted to the Company or the Reinsurer through E. W. Blanch Co.,
Reinsurance Services, 3500 West 80th Street, Minneapolis, Minnesota 55431.
Payments by the Company to the Intermediary shall be deemed to constitute
payment to the Reinsurer. Payments by the Reinsurer to the Intermediary shall be
deemed to constitute payment to the Company only to the extent that such
payments are actually received by the Company.


IN WITNESS WHEREOF, the Company by its duly authorized representative has
executed this Contract as of the date undermentioned at:

Calabasas, California, this 28th day of May 1998.

                               /s/ MATTHEW NATALIZIO
                             ---------------------------------------------------
                             Superior National Insurance Group



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<PAGE>   1
                                                                      EXHIBIT 12

                              SNIG and Subsidiaries
    Computation of ratio of earnings to fixed charges and preferred dividends
                          (Dollar amounts in thousands)


<TABLE>
<CAPTION>
                                                     March 31   March 31                   Year ended December 31,           
                                                     --------   --------     ---------------------------------------------------
                                                         1998       1997     1997     1996      1995      1994     1993    1992
                                                         ----       ----     ----     ----      ----      ----     ----    ----
<S>                                                  <C>        <C>        <C>       <C>       <C>        <C>      <C>     <C>      
Income from continuing operations before                                                                                            
   provision for income taxes                            $6,078    $1,881  $17,261   $ 5,227   $11,689   $ 4,997   $2,204   $15,855 
Add:                                                                                                                                
       Portion of rents representative of                                                                                           
         the interest factor                                634       184    1,340       639       614       570      469       518 
       Interest on indebtedness                               1     1,727    6,335     7,527     9,619     8,726    6,221     1,258 
       Amortization of debt expense and premium                                                                                     
        or discount (related to indebtedness)                --        --       --        --        --     1,151       86        -- 
                                                                                                                                    
Income as adjusted                                       $6,713    $3,792  $24,936   $13,393   $21,922   $15,444   $8,980   $17,631 
                                                         ======    ======  =======   =======   =======   =======   ======   ======= 
                                                                                                                                    
Preferred dividend requirements                          $1,872    $  454  $ 3,069   $ 1,667   $ 1,488   $   683   $   --   $    -- 
Ratio of income before provision for income
   taxes to net income*                                     161%      155%     159%      144%      100%      139%      81%      150%
Preferred dividend factor on pretax basis                $3,020    $  706  $ 4,894   $ 2,400   $ 1,486   $   948   $   --   $    -- 
                                                                                                                                    
Fixed charges:                                                                                                                      
       Interest on indebtedness (exp or capitalized)          1     1,727    6,335     7,527     9,619     8,726    6,221     1,258 
       Amortization of debt expense and premium                                                                                     
         or discount                                         --        --       --        --        --     1,151       86        -- 
       Capitalized Interest                                  --        --       --        --        --        --       --        -- 
       Portion of rents representative of the                                                                                       
         interest factor                                    634       184    1,340       639       614       570      469       518 
                                                         ------    ------  -------   -------   -------   -------   ------   ------- 
            Fixed charges and preferred dividends        $3,655    $2,617  $12,569   $10,566   $11,719   $11,395   $6,776   $ 1,776 
                                                         ======    ======  =======   =======   =======   =======   ======   ======= 

Ratio of earnings to fixed charges
   and preferred dividends                                 1.84      1.45     1.98      1.27      1.87      1.36     1.33      9.93 

Income from continuing operations after                                                                                             
   provision for income taxes and before x-items          3,767     1,210   10,824     3,630    11,701     3,599    2,734    10,549 
                                                                                                                               

<CAPTION>
                                                                         Pro Forma
                                                                -------------------------
                                                                Mar. 1998   December 1997
                                                                ---------   -------------
<S>                                                             <C>         <C>
Income from continuing operations before
   provision for income taxes                                     $3,489    ($ 7,532)
Add:
            Portion of rents representative of
              the interest factor                                  1,359       4,239
            Interest on indebtedness                               2,338      16,274
            Amortization of debt expense and premium
             or discount (related to indebtedness)                    --          --
                                                                  ------    --------
Income as adjusted                                                $7,186    $ 12,981
                                                                  ======    ========

Preferred dividend requirements                                   $1,872    $  3,069
Ratio of income before provision for income taxes to
   net income *                                                       50%        231%
Preferred dividend factor on pretax basis                         $  935    $  7,080

Fixed charges:
            Interest on indebtedness (exp or capitalized)          2,338      16,274
            Amortization of debt expense and premium
              or discount                                             --          --
            Capitalized Interest                                      --          --
            Portion of rents representative of the
              interest factor                                      1,359       4,239
                                                                  ------    --------
                 Fixed charges and preferred dividends            $4,632    $ 27,593
                                                                  ======    ========

Ratio of earnings to fixed charges and preferred dividends          1.55        0.47
Income from continuing operations after
   provision for income taxes and before x-items                   6,989      (3,265)
</TABLE>


* Represents income from continuing operations before provision for income taxes
divided by income from continuing operations, which adjusts dividends on
preferred stock to a pre-tax basis.


<PAGE>   2

Superior National Insurance Group, Inc.
and Business Insurance Group
Summary of Historical and Pro-Forma Financial Data
EBITDA Calculation

<TABLE>
<CAPTION>
                                         Three Months Ended March 31,
                                         ----------------------------
                                                                     
                                                                     
                                                                     
EBITDA                                        1998           1997    
                                              ----           ----    
<S>                                          <C>         <C>         

Net Income                                    1,895          756     
Extraordinary loss retirement                    --          453     
Preferred Security Accretion                  1,872          454     
Discontinued Ops                             10,300        2,991     
Cumulative change in accounting              (2,297)
O/S Loss Debentures                             635           --     
Loss on early Imperial Loan redemption                               
                                             ------      -------     
                                              3,767        1,210     

Income Tax Expense
[added back in]                               2,311          671     
                                             ------      -------     
                                              6,078        1,881     

Interest Expense                                  1        1,727     
                                             ------      -------     
                                              6,079        3,608     

Goodwill Amortization                           304           --     
Dep'n & Amortization                            326          545     
Change in DAC                                  (108)      (1,206)    
                                             ------      -------     

                                  EBITDA      6,601      $ 2,947     
                                             ======      =======     

                         Ratio of EBITDA     352.43%      135.12%    

Ratio of Preferred Securities to EBITDA         n/a          n/a     

Depreciation Exp - Capitalized Items            204          473     
WSSC Depreciation                                50           50     
Amortization - Leasehold Items                   72           22     
                                             ------      -------     
                                                326          545     
                                             ======      =======     

BALANCE OF P/S ISSUED                                                




SNIC
Depreciation Exp - Capitalized Items                                 
WSSC Depreciation                                                    
Amortization - Leasehold Items                                       
                                                                     
                                                                     
                                                                     

BIG
Depreciation Exp - Capitalized Items                                 
WSSC Depreciation                                                    
Amortization - Leasehold Items                                       
                                                                     
                                                                     
                                                                     



<CAPTION>
                                                                Year Ended December 31,
                                                                -----------------------
                                                                                                                 PRO           PRO
                                                                                                                FORMA         FORMA
                                                                                                                31-Mar        31-Dec
EBITDA                                        1992      1993      1994       1995        1996       1997         1998         1997
                                              ----      ----      ----       ----        ----       ----         ----         ----
<S>                                        <C>         <C>       <C>        <C>        <C>        <C>          <C>          <C>

Net Income                                      249      1,587       894        371      1,963     (5,141)       1,617      (23,497)
Extraordinary loss retirement                 2,022     12,100        --     12,100
Preferred Security Accretion                    683      1,488     1,667      3,069      1,872      3,069
Discontinued Ops                              9,842
Cumulative change in accounting            
O/S Loss Debentures                             635
Loss on early Imperial Loan redemption                                                                161           --          161
                                           --------    -------   -------    -------    -------    -------      -------      -------
                                             10,549      2,734     3,599     11,701      3,630     10,824        3,489       (7,532)

Income Tax Expense
[added back in]                               5,306       (530)    1,398        (12)     1,597      6,437        1,684       (4,424)
                                           --------    -------   -------    -------    -------    -------      -------      -------
                                             15,855      2,204     4,997     11,689      5,227     17,261        5,173      (11,956)

Interest Expense                              1,258      6,221     8,726      9,619      7,527      6,335        2,338       16,274
                                           --------    -------   -------    -------    -------    -------      -------      -------
                                             17,113      8,425    13,723     21,308     12,754     23,596        7,511        4,318

Goodwill Amortization                                                                               1,039          (24)        (274)
Dep'n & Amortization                            294        997     1,107      1,219      2,110      2,951        1,209        6,479
Change in DAC                                  (635)      (122)      446        125       (137)    (2,837)        (948)      (6,732)
                                           --------    -------   -------    -------    -------    -------      -------      -------

                                  EBITDA   $ 16,772    $ 9,300   $15,276    $22,652    $14,727    $24,749      $ 7,748      $ 3,791
                                           ========    =======   =======    =======    =======    =======      =======      =======

                         Ratio of EBITDA    1333.23%    149.49%   162.36%    203.94%    160.18%    263.18%      184.04%       19.60%

Ratio of Preferred Securities to EBITDA         n/a        n/a       n/a        n/a        n/a        n/a      1307.14%     2671.88%

Depreciation Exp - Capitalized Items            212        814       828        945      1,832      2,530        1,087        6,058
WSSC Depreciation                                --        150       200        200        200        200           50          200
Amortization - Leasehold Items                   82         33        79         74         78        221           72          221
                                           --------    -------   -------    -------    -------    -------      -------      -------
                                                294        997     1,107      1,219      2,110      2,951        1,209        6,479
                                           ========    =======   =======    =======    =======    =======      =======      =======

BALANCE OF P/S ISSUED                                                                                          101,277      101,291




SNIC
Depreciation Exp - Capitalized Items                                                                               204        2,530
WSSC Depreciation                                                                                                   50          200
Amortization - Leasehold Items                                                                                      72          221
                                                                                                               -------      -------
                                                                                                                   326        2,951
                                                                                                               =======      =======

BIG
Depreciation Exp - Capitalized Items                                                                               883        3,528
WSSC Depreciation                                                                                                  -            -
Amortization - Leasehold Items                                                                                     -            -
                                                                                                               -------      -------
                                                                                                                   883        3,528
                                                                                                               =======      =======
</TABLE>

<PAGE>   1
                                                                    EXHIBIT 23.1


                         INDEPENDENT AUDITORS' CONSENT


The Board of Directors
Superior National Insurance Group, Inc.:


We consent to the use of our reports included herein and to the reference to
our firm under the heading "Experts" in the prospectus.


                                    KPMG Peat Marwick LLP


Los Angeles, California
July 6, 1998

<PAGE>   1
                                                                    EXHIBIT 23.2


INDEPENDENT AUDITORS' CONSENT


We consent to the use in this Registration Statement (No. 333-_____) of Superior
National Insurance Group, Inc. on Form S-1 of our report dated June 19, 1998 on
the combined financial statements of the Insurance Operations of Business
Insurance Group, Inc. as of December 31, 1997 and 1996 and for the three years
ended December 31, 1997 appearing in the Prospectus, which is part of this
Registration Statement.

We also consent to the reference to us under the heading "Experts" in such
Prospectus.


/s/ Deloitte & Touche LLP

July 6, 1998

<TABLE> <S> <C>

<ARTICLE> 7
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<DEBT-HELD-FOR-SALE>                           611,163
<DEBT-CARRYING-VALUE>                           14,059
<DEBT-MARKET-VALUE>                             14,227
<EQUITIES>                                           0
<MORTGAGE>                                           0
<REAL-ESTATE>                                   29,821
<TOTAL-INVEST>                                 763,171
<CASH>                                          98,128
<RECOVER-REINSURE>                              18,518<F1>
<DEFERRED-ACQUISITION>                          23,841
<TOTAL-ASSETS>                               1,222,406
<POLICY-LOSSES>                                728,421
<UNEARNED-PREMIUMS>                             45,004
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                            3,015
<NOTES-PAYABLE>                                121,750
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                     252,346
<TOTAL-LIABILITY-AND-EQUITY>                 1,222,406
                                     515,272
<INVESTMENT-INCOME>                             37,548
<INVESTMENT-GAINS>                               7,176
<OTHER-INCOME>                                   3,512
<BENEFITS>                                     443,204
<UNDERWRITING-AMORTIZATION>                     36,174
<UNDERWRITING-OTHER>                           132,013<F2>
<INCOME-PRETAX>                               (58,264)
<INCOME-TAX>                                  (28,847)
<INCOME-CONTINUING>                           (29,417)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (29,417)
<EPS-PRIMARY>                                        0<F3>
<EPS-DILUTED>                                        0<F3>
<RESERVE-OPEN>                                 469,425
<PROVISION-CURRENT>                            367,971
<PROVISION-PRIOR>                               75,233
<PAYMENTS-CURRENT>                           (135,202)
<PAYMENTS-PRIOR>                             (255,877)
<RESERVE-CLOSE>                                521,550
<CUMULATIVE-DEFICIENCY>                         75,233
<FN>
<F1>REINSURANCE RECOVERABLE ON PAID LOSSES.
<F2>EXCLUDES INTEREST, GOODWILL AND DIVIDENDS.
<F3>EPS INFORMATION NOT APPLICABLE AS BIG WAS A WHOLLY
    OWNED SUBSIDIARY OF FHC.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 7
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<DEBT-HELD-FOR-SALE>                           656,829
<DEBT-CARRYING-VALUE>                           14,020
<DEBT-MARKET-VALUE>                             14,180
<EQUITIES>                                           0
<MORTGAGE>                                           0
<REAL-ESTATE>                                   29,658
<TOTAL-INVEST>                                 791,826
<CASH>                                          81,319
<RECOVER-REINSURE>                              16,040<F1>
<DEFERRED-ACQUISITION>                          24,681
<TOTAL-ASSETS>                               1,205,022
<POLICY-LOSSES>                                713,473
<UNEARNED-PREMIUMS>                             49,469
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                            2,823
<NOTES-PAYABLE>                                121,750
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                     247,021
<TOTAL-LIABILITY-AND-EQUITY>                 1,205,022
                                     139,612
<INVESTMENT-INCOME>                              9,627
<INVESTMENT-GAINS>                                 226
<OTHER-INCOME>                                     166
<BENEFITS>                                     114,286
<UNDERWRITING-AMORTIZATION>                      8,218
<UNDERWRITING-OTHER>                            33,914<F2>
<INCOME-PRETAX>                                (9,575)
<INCOME-TAX>                                   (5,394)
<INCOME-CONTINUING>                            (4,181)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (4,181)
<EPS-PRIMARY>                                        0<F3>
<EPS-DILUTED>                                        0<F3>
<RESERVE-OPEN>                                 521,550
<PROVISION-CURRENT>                            114,888
<PROVISION-PRIOR>                                (602)
<PAYMENTS-CURRENT>                            (11,980)
<PAYMENTS-PRIOR>                             (106,473)
<RESERVE-CLOSE>                                517,383
<CUMULATIVE-DEFICIENCY>                          (602)
<FN>
<F1>REINSURANCE RECOVERABLE ON PAID LOSSES.
<F2>EXCLUDES INTEREST, GOODWILL AND DIVIDENDS.
<F3>EPS INFORMATION NOT APPLICABLE AS BIG WAS A WHOLLY
    OWNED SUBSIDIARY OF FHC.
</FN>
        

</TABLE>


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