NAC RE CORP
10-K405, 1998-03-24
FIRE, MARINE & CASUALTY INSURANCE
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                                 UNITED STATES
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                            WASHINGTON, D. C. 20549
                               -----------------
                                   FORM 10-K
 
(MARK ONE)
 
  /X/  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
       ACT OF 1934
     FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
 
                                       OR
 
  / /  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
       EXCHANGE ACT OF 1934
 
       FOR THE TRANSITION PERIOD FROM ________________________ TO
       ________________________
       COMMISSION FILE NUMBER 0-13891
                              -------------------
                                  NAC RE CORP.
 
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                            ------------------------
 
<TABLE>
<S>                                            <C>
                  DELAWARE                                      13-3297840
       (State or other jurisdiction of             (I.R.S. Employer Identification No.)
       incorporation or organization)
</TABLE>
 
                 ONE GREENWICH PLAZA, GREENWICH, CT 06836-2568
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (203) 622-5200
                              -------------------
 
          SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
 
<TABLE>
<S>                                                       <C>
                  TITLE OF EACH CLASS                            NAME OF EACH EXCHANGE ON WHICH REGISTERED
         Common Stock, par value $.10 per share                           New York Stock Exchange
 
            Preferred Stock Purchase Rights                               New York Stock Exchange
</TABLE>
 
          SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:
 
                                      None
                                (TITLE OF CLASS)
 
    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes /X/ No / /
 
    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. /X/
 
    The aggregate market value on March 3, 1998 of the voting stock held by
non-affiliates of the registrant was approximately $862 million.
 
    There were 18,369,389 shares outstanding of the Registrant's Common Stock,
$.10 par value as of March 3, 1998.
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
(1) Portions of the 1997 Annual Report to Shareholders, as indicated herein
    (Parts I and II).
 
(2) Proxy Statement involving the election of directors and other matters which
    the registrant intends to file with the Commission within 120 days after
    December 31, 1997 (Part III).
 
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<PAGE>
                         NAC RE CORP. AND SUBSIDIARIES
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                                   PAGE
ITEM                                                                                                              NUMBER
- ---------                                                                                                      -------------
<C>        <S>                                                                                                 <C>
 
                                                         PART I
 
       1.  Business..........................................................................................            1
 
       2.  Properties........................................................................................           14
 
       3.  Legal Proceedings.................................................................................           14
 
       4.  Submission of Matters to a Vote of Security Holders...............................................           14
 
                                                        PART II
 
       5.  Market for the Registrant's Common Stock and Related Stockholder Matters..........................           15
 
       6.  Selected Financial Data...........................................................................           15
 
       7.  Management's Discussion and Analysis of Financial Condition and Results of Operations.............           15
 
       8.  Financial Statements and Supplementary Data.......................................................           16
 
       9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosures.............           16
 
                                                        PART III
 
      10.  Directors and Executive Officers..................................................................           16
 
      11.  Executive Compensation............................................................................           16
 
      12.  Security Ownership of Certain Beneficial Owners and Management....................................           16
 
      13.  Certain Relationships and Related Transactions....................................................           16
 
                                                        PART IV
 
      14.  Exhibits, Financial Statement Schedules, and Reports on Form 8-K..................................           16
</TABLE>
<PAGE>
                                     PART I
 
ITEM 1. BUSINESS
 
HISTORY
 
    NAC Re Corp. ("NAC Re") is a Delaware corporation that was organized on June
27, 1985 for the purpose of holding all the outstanding shares of common stock
of NAC Reinsurance Corporation ("NAC"), a property and casualty reinsurance
company. Based on industry data published by the Reinsurance Association of
America ("RAA") as of December 31, 1997, NAC is the 8th largest reinsurance
company in the United States, ranked by statutory surplus. NAC is the parent
company of three subsidiaries: Greenwich Insurance Company, Indian Harbor
Insurance Company and NAC Re International Holdings Limited. NAC Re and its
subsidiaries are collectively referred to as the Company.
 
    NAC was incorporated in New York in 1929 and from 1939 until April 30, 1984,
NAC was a wholly-owned subsidiary of CIT Financial Corporation ("CIT"). On April
30, 1984, CIT transferred ownership of NAC to RCA Corporation ("RCA"), the then
parent corporation of CIT. On May 24, 1984, Kramer Capital Corporation ("KCC"),
through Grey Eagle Enterprises, Inc., a Delaware corporation owned 95% by KCC
and 5% by the former President and Chief Operating Officer of NAC, acquired NAC
from RCA. After completion of a public offering in October 1985, KCC controlled
approximately 51% of the Common Stock of NAC Re. On January 8, 1987, following
the approval of their respective stockholders, KCC was merged into NAC Re. As a
result of the merger, NAC Re became 100% publicly owned.
 
    NAC is licensed to write reinsurance in all 50 states, the District of
Columbia, Puerto Rico and all provinces of Canada. Prior to 1977, NAC wrote both
primary insurance and reinsurance business for a variety of risks. Because of
substantial losses incurred from such business, NAC discontinued writing any
significant new insurance or reinsurance and was operated as a run-off company
from 1977 to 1981. NAC's reserves, net of reinsurance recoverables, for business
written prior to 1977, which includes aircraft and marine risks, general
liability, medical, accountant's and attorney's malpractice, other professional
risks and foreign risks, are approximately $39.5 million or less than 3% of
total net claims and claims expense reserves as of December 31, 1997.
 
    In 1990, NAC acquired Greenwich Insurance Company ("Greenwich"), formerly
Harbor Insurance Company, from The Continental Corporation. All liabilities
incurred before the acquisition date, including insurance obligations under
expired as well as in-force business, remained with the previous owner and its
affiliates. Greenwich writes principally primary insurance and is licensed in
all 50 states to write primary insurance and reinsurance.
 
    In 1992, NAC received regulatory authorization for a newly formed insurance
subsidiary, Indian Harbor Insurance Company ("Indian Harbor"). As a surplus
lines carrier, Indian Harbor is licensed in only its state of domicile, North
Dakota, and writes primary business on a nonadmitted basis in selected states.
 
    In December 1993, NAC, through NAC Re International Holdings Limited, formed
and received U.S. and U.K. regulatory authorization for a new reinsurance
subsidiary, NAC Reinsurance International Limited ("NAC Re International"),
based in London, England. NAC Re International, capitalized as of December 31,
1997 with approximately $148.5 million, primarily writes non-U.S. international
property and casualty treaty and facultative reinsurance business. During 1997,
NAC Re International Holdings Limited formed a subsidiary, Stonebridge
Underwriting, Ltd., which is participating as a corporate capital vehicle on a
Lloyd's syndicate commencing with underwriting year 1998. See Note 10 of the
Notes to the Consolidated Financial Statements of NAC Re for further discussion.
 
                                       1
<PAGE>
GENERAL
 
    The Company, through NAC and its subsidiaries, is principally engaged in
providing treaty and facultative reinsurance to primary insurers of casualty
risks (principally general liability, professional liability, automobile and
workers' compensation) and commercial and personal property risks (including
fidelity/surety and ocean marine). In consideration for reinsuring risks, the
Company receives premiums from the primary insurer. In many cases, the Company
reinsures part of its risk with other reinsurers and pays a premium to such
reinsurers.
 
    Reinsurance provides primary insurers with three principal benefits:
reducing net exposure on individual risks, protecting against catastrophic
losses and maintaining acceptable capital ratios. Retrocessions provide
reinsurers with similar benefits. Reinsurance, including retrocessions, does not
legally discharge the reinsured from its liability with respect to its
obligations to the policyholder.
 
    The Company generally writes property and casualty treaty business through
reinsurance brokers, facultative business on a direct basis (directly with the
primary company), and fidelity/surety and ocean marine through both reinsurance
brokers and on a direct basis.
 
    Treaty reinsurance is a contractual arrangement that provides for the
automatic reinsuring by the Company of a specified type or category of risks
underwritten by the primary insurer. Typically, the primary insurer is required
to cede the agreed type or category of risks to the Company and the Company is
obligated to accept a specified portion of such risks. The Company determines
whether to write particular treaties based on many factors, including the
reinsured's risk management and underwriting practices. In treaty reinsurance,
the reinsurer typically does not separately evaluate each of the individual
risks assumed and, within prescribed parameters, is generally dependent on the
underwriting decisions made by the primary insurer. Such dependence subjects the
reinsurer to the risk that the primary insurer has not adequately determined the
risk to be reinsured and, accordingly, the premium ceded to the reinsurer in
connection therewith may not adequately compensate the reinsurer for the risk
assumed. Treaty reinsurance, including fidelity/surety business, constitutes
approximately 76% of the Company's business.
 
    Facultative reinsurance is the reinsurance of individual risks; rather than
an agreement to reinsure all or a portion of a class of risks, the reinsurer
separately rates and underwrites each risk. A portion of the Company's
facultative business is written on an "automatic" basis. Automatic facultative
agreements provide coverage on a blanket basis for risks which would otherwise
be reinsured on an individual basis. Eligible risks must be underwritten by the
cedant in accordance with agreement guidelines, which are generally more
restrictive than typical treaty arrangements. Traditionally, risks covered by
facultative reinsurance are those excluded from coverage by treaty reinsurance.
 
    Approximately 54% of the Company's business in 1997 was written on an excess
of loss basis, under which the Company indemnifies an insurer for a portion of
the losses on insurance policies in excess of a specified loss amount, generally
$1 million or more, and up to an amount per loss specified in the contract. The
balance of the Company's business is written on either a pro rata basis under
which the Company assumes from the primary insurer a percentage of loss
specified in the treaty of each risk in the reinsured class or on a primary
insurance basis as discussed below.
 
    Premiums that the primary insurer pays to the reinsurer for excess of loss
coverage are not directly proportional to the premiums that the primary insurer
receives because the reinsurer does not assume a proportionate risk. In most
instances, the reinsurer does not pay commissions to the primary insurer in
connection with excess of loss reinsurance. In pro rata reinsurance, premiums
that the primary insurer pays to the reinsurer are proportional to the premiums
that the primary insurer receives and the reinsurer generally pays the primary
insurer a ceding commission. Generally, the ceding commission is based on the
primary insurer's cost of obtaining the business being reinsured, such as
commission, local taxes, settlement costs and miscellaneous administrative
expenses.
 
                                       2
<PAGE>
    The amount of premium received by the reinsurer for reinsuring risks on a
pro rata basis is generally based on the primary insurer's initial underwriting
assumptions. Thus, if the primary insurer does not accurately estimate the
ultimate losses to be incurred on the risks insured, the reinsurer may also
incur an underwriting loss. Excess of loss reinsurance allows the flexibility to
negotiate a premium based on the reinsurer's own estimate of the actual amount
of losses to be incurred. However, as a practical matter, the rates charged by
primary insurers and the policy terms of primary insurance agreements may affect
the rates charged and the policy terms associated with reinsurance agreements.
 
    The Company also writes primary program insurance business through Greenwich
and Indian Harbor. The principle lines of primary business written include
automobile, auto warranty, aviation, multiple peril and inland marine. The
business is written principally through participation in underwriting pools and
contractual relationships with managing general agents and general agents. The
Company evaluates each business relationship based upon the underwriting
experience and operational expertise of each distribution channel selected, and
performs an analysis to evaluate financial security. The Company periodically
performs underwriting, claims and operational audits of each pool and agency
relationship.
 
    See "Management's Discussion and Analysis of Financial Condition and Results
of Operations" for a discussion of the Company's premium revenues.
 
COMPETITION
 
    The property and casualty reinsurance industry has been characterized by
severe price competition over the last few years. The Company competes with
numerous international and domestic reinsurance companies. These competitors,
several of which have far greater financial and other resources, include
independent reinsurance companies and subsidiaries or affiliates of established
worldwide insurance companies. They also include the reinsurance departments of
some primary insurance companies and underwriting syndicates in Lloyd's.
 
    Competition in the types of reinsurance business in which the Company is
engaged is based on many factors. These factors include perceived overall
financial strength, size, premiums charged, limits capacity, A.M. Best Company's
("A.M. Best") ratings (see Ratings discussion), services offered, underwriting
expertise and quality of claims management. The number of jurisdictions in which
a reinsurer is licensed to do business is also a factor. The Company believes
that the A.M. Best "A+" rating and the Standard and Poor's ("S&P") "AA-" rating
of NAC and its domestic subsidiaries, its nationwide licensing, its reputation
for prompt claims payment and a high level of client service, together with its
limits capacity and surplus size, put it in a favorable position to compete for
new reinsurance opportunities and retain its existing client base.
 
    See Industry Overview included in the "Management's Discussion and Analysis
of Financial Condition and Results of Operations" for a discussion of current
market conditions.
 
REGULATION
 
    See "Management's Discussion and Analysis of Financial Condition and Results
of Operations" and Note 11 of the Notes to the Consolidated Financial Statements
of NAC Re for a discussion of the regulatory issues that impact the Company.
 
MARKETING
 
    The Company obtains substantially all of its treaty business through
reinsurance brokers. The Company evaluates the financial condition of its
reinsurance brokers on a regular basis. The Company generally pays brokers from
1% to 2.5% of premiums ceded on pro rata business, 5% on "working layer" excess
of loss reinsurance (i.e., reinsurance attaching within the first $1 million of
coverage), and 10% on "non-working layer" excess of loss reinsurance (i.e.,
reinsurance attaching at or above the $1 million layer).
 
                                       3
<PAGE>
The reinsurance broker typically represents the primary insurer in negotiating
and purchasing reinsurance. The Company's facultative reinsurance generally is
written on a direct basis, with the exception of automatic agreements which may
be written through reinsurance brokers.
 
    See Note 10 of the Notes to the Consolidated Financial Statements of NAC Re
for information regarding the Company's major clients and brokers.
 
UNDERWRITING
 
    Underwriting opportunities presented to the Company are evaluated based upon
a number of factors, including the type and layer of risk to be assumed,
actuarial evaluation of premium adequacy, the primary insurer's underwriting and
claims experience, the primary insurer's financial condition and A.M. Best's
rating, the Company's exposure and experience with the primary insurer and the
line of business to be underwritten. The Company will also perform on-site
underwriting reviews of the primary insurers where deemed necessary to determine
the quality of a current or prospective client's underwriting operation.
 
CLAIMS
 
    Claims are managed by the Company's professional claims staff whose
responsibilities include reviewing initial loss reports and coverage issues,
monitoring claims handling activities of ceding companies, establishing and
adjusting proper case reserves and approving payment of claims. In addition to
claims assessment, processing and payment, the claims staff selectively conducts
comprehensive claims audits of both specific claims and overall claims
procedures at the offices of selected ceding companies.
 
RESERVES
 
    The Company establishes reserves to provide for the ultimate settlement and
administration of claims for losses, including both claims that have been
reported to the Company and claims for losses that have occurred but have not
been reported to the Company.
 
    The Company establishes reserves for reported claims when it first receives
notice of the claim and may change the reserve as new information becomes known.
It is the Company's policy not to establish a reserve less than the reserve
established by the primary insurer; in many cases, the Company sets up a reserve
higher than the reserve established by the ceding company based on its
evaluation of the claim. In the case of excess of loss reinsurance, reserves are
established on a case by case basis by evaluating several factors. These factors
include the type of claim involved, the circumstances surrounding such claim,
the severity of injury or damage, the Company's experience with the primary
insurer and the policy provisions relating to the type of claim. The Company
regularly adjusts its reserves to reflect newly reported claims, inflation and
other developments. The Company periodically conducts claims audits of its
ceding companies to determine if the amount recommended by the primary insurer
is sufficient or should be increased. Reserves for incurred but not reported
(IBNR) claims are established on the basis of actuarial analysis of statistical
loss information, which is utilized to project ultimate claims costs. Actuarial
reviews of the Company's reserves are conducted quarterly by actuaries employed
by the Company.
 
    Claims reserves are only estimates at a given point in time, based on facts
and circumstances then known, of the amount the insurer or reinsurer expects to
pay on claims. It is possible that the ultimate liability may exceed or be less
than such estimates. The estimates are not precise inasmuch as, among other
things, they are based on predictions of future events and estimates of future
trends in claims severity and frequency and other variable factors. As
additional facts become known during the claim settlement period, it often
becomes necessary to refine and adjust the estimates of liability on a claim
and, even then, the ultimate liability may exceed or be less than the revised
estimates. The estimation of reserves for reinsurers, particularly those that
have experienced recent substantial growth in premium revenues, such as the
Company, is inherently more difficult than the reserve estimations of primary
companies or reinsurers with a fairly stable volume of business and loss
history.
 
                                       4
<PAGE>
    The reserving process is intended to provide implicit recognition of the
impact of inflation and other factors affecting claims payments by taking into
account changes in historical payment patterns and perceived probable trends
(note additional consideration for workers' compensation case reserves as
described below). There is generally no precise method, however, for
subsequently evaluating the adequacy of the consideration given to inflation or
to any other specific factor, because the eventual deficiency or redundancy of
reserves is affected by many factors, some of which are interdependent.
 
    The Company's reserving process includes periodic evaluation of the
potential impact on claims liabilities from exposure to asbestos and
environmental claims, including related loss adjustment expenses. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and Note 4 of the Notes to the Consolidated Financial Statements of
NAC Re for a discussion of asbestos and environmental claims.
 
    The Company establishes claims expense reserves to provide for the ultimate
cost of investigating all claims, administering the claims payment process and
defending lawsuits arising from claims. Such claims expense reserves represent
estimates based on actual experience and historical data such as the ratio of
claims expenses to claims paid and other currently available information. Claims
expense reserves comprise "allocated expenses" (those directly attributable to
the specific risk being covered) and "unallocated expenses" (those expenses not
directly attributable to a given risk, such as overhead, administrative expenses
and salary).
 
    Except for certain workers' compensation case reserves, the Company does not
discount its reserves in an attempt to present-value the claims or claims
expenses. The Company utilizes tabular reserving for certain workers'
compensation case reserves that are considered fixed and determinable, and
discounts such reserves using a 7% interest rate for financial statements
prepared in accordance with generally accepted accounting principles (GAAP) and
a 5% interest rate for statutory accounting purposes. Tabular reserving
methodology results in applying uniform and consistent criteria for establishing
expected future indemnity and medical payments (including an explicit factor for
inflation) and the use of mortality tables to determine expected payment
periods.
 
    A reconciliation of the difference between the reserves for claims and
claims expenses determined in accordance with GAAP and those recorded for
statutory reporting purposes is as follows:
 
<TABLE>
<CAPTION>
                                                                                       (IN THOUSANDS)
                                                                          ----------------------------------------
<S>                                                                       <C>           <C>           <C>
                                                                              1997          1996          1995
                                                                          ------------  ------------  ------------
Domestic liability reported on a statutory basis, net of reinsurance....  $  1,319,908  $  1,036,227  $    914,045
International liability, net of reinsurance.............................        91,528        74,530        42,414
Difference in discount rate applied to workers' compensation case
  reserves, net.........................................................        (4,300)       (3,540)       (2,790)
Reinsurance recoverable.................................................       196,836       406,128       338,746
                                                                          ------------  ------------  ------------
Consolidated liability reported on a GAAP basis, gross of reinsurance...  $  1,603,972  $  1,513,345  $  1,292,415
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
</TABLE>
 
    Note 4 of the Notes to the Consolidated Financial Statements of NAC Re
provides a table which analyzes paid and unpaid claims and claims expenses and a
reconciliation of beginning and ending reserve balances for the years ended
December 31, 1997, 1996 and 1995. Included in such analysis is a discussion of
certain factors which impact both current and prior year claims activity.
 
    The following table on page 7 represents the development of GAAP balance
sheet reserves for 1987 through 1997. The top line of the table shows the
reserves, net of reinsurance recoverables, at the balance sheet date for each of
the indicated years. This represents the estimated amounts of net claims and
claims expenses arising in all prior years that are unpaid at the balance sheet
date, including IBNR. The reserve
 
                                       5
<PAGE>
for claims and claims expenses for 1988 and subsequent years is net of the 7%
discount related to workers' compensation tabular reserves. The upper portion of
the table shows the re-estimated amount of the previously recorded reserve based
on experience as of the end of each succeeding year. The estimate changes as
more information becomes known about the frequency and severity of claims for
individual years. The re-estimated reserve for each year reflects the 7%
discount related to workers' compensation tabular reserves. The "Cumulative
Redundancy (Deficiency)" represents the aggregate change in the estimates over
all prior years. The lower portion of the table shows the cumulative amounts
paid as of successive years with respect to that reserve liability. The table on
page 8 represents the claim development of the gross balance sheet reserves for
years 1992 through 1997.
 
    With respect to the information in the table below, it should be noted that
each amount includes the effects of all changes in amounts for prior periods.
For example, the amount of the deficiency related to claims settled in 1990, but
incurred in 1987, will be included in the cumulative deficiency amount for years
1987, 1988 and 1989. This table does not present accident or policy year
development data. Conditions and trends that have affected development of the
liability in the past may not necessarily occur in the future. Accordingly, it
may not be appropriate to extrapolate future reserve development based on these
tables. For further discussion of reserve and retrocessional activity see
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and Notes 4 and 6 of the Notes to the Consolidated Financial
Statements of NAC Re.
 
                                       6
<PAGE>
               DEVELOPMENT OF CLAIMS AND CLAIMS EXPENSE RESERVES
                        NET OF REINSURANCE RECOVERABLES
                                 (IN MILLIONS)
 
<TABLE>
<CAPTION>
                                                                                   YEAR ENDED DECEMBER 31,
                                                              ------------------------------------------------------------------
<S>                                                           <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>
                                                              1987  1988  1989  1990  1991  1992  1993  1994  1995  1996   1997
                                                              ----  ----  ----  ----  ----  ----  ----  ----  ----  ----  ------
RESERVE FOR CLAIMS AND CLAIMS EXPENSES, NET OF REINSURANCE
  RECOVERABLES..............................................  $201  $292* $388  $469  $529  $626  $697  $808  $954  $1,107 $1,407
RESERVE RE-ESTIMATED AS OF:
  One year later............................................   209*  293   384   460   494   602   653   788   921  1,068
  Two years later...........................................   214   289   376   427   464   548   648   755   882
  Three years later.........................................   214   281   350   407   423   549   630   724
  Four years later..........................................   213   258   336   379   424   531   606
  Five years later..........................................   199   253   321   392   417   531
  Six years later...........................................   203   245   331   391   425
  Seven years later.........................................   199   265   336   409
  Eight years later.........................................   226   273   352
  Nine years later..........................................   234   283
  Ten years later...........................................   239
CUMULATIVE REDUNDANCY (DEFICIENCY)..........................   (38)    9    36    60   104    95    91    84    72    39
PERCENTAGE..................................................   (19%)    3%    9%   13%   20%   15%   13%   10%    8%    4%
CUMULATIVE AMOUNT OF LIABILITY PAID, NET OF REINSURANCE
  RECOVERABLES, PAID THROUGH:
  One year later............................................   $23   $34   $60   $81   $65  $104  $119  $140  $146   $27
  Two years later...........................................    48    73   109   126   116   173   207   233   161
  Three years later.........................................    72   102   134   166   158   229   258   240
  Four years later..........................................    91   117   161   197   199   261   246
  Five years later..........................................   101   133   179   226   220   257
  Six years later...........................................   112   148   200   244   213
  Seven years later.........................................   125   163   213   240
  Eight years later.........................................   137   174   212
  Nine years later..........................................   148   176
  Ten years later...........................................   151
</TABLE>
 
- ------------------------
 
*   The reserve for claims and claims expense, net of reinsurance recoverables
    for 1988 and subsequent years is net of the 7% discount related to certain
    workers' compensation case reserves. The re-estimated reserve for each year
    includes the discount effect.
 
                                       7
<PAGE>
               DEVELOPMENT OF CLAIMS AND CLAIMS EXPENSE RESERVES
 
                       GROSS OF REINSURANCE RECOVERABLES
                                 (IN MILLIONS)
<TABLE>
<CAPTION>
                                                                                     YEAR ENDED DECEMBER 31,
                                                                      -----------------------------------------------------
<S>                                                                   <C>        <C>        <C>        <C>        <C>
                                                                        1992       1993       1994       1995       1996
                                                                      ---------  ---------  ---------  ---------  ---------
GROSS RESERVE FOR CLAIMS AND CLAIMS EXPENSES:.......................  $     808  $     909  $   1,086  $   1,292  $   1,513
Reserve re-estimated as of:
  One year later....................................................        798        873      1,097      1,280      1,446
  Two years later...................................................        755        882      1,093      1,208
  Three years later.................................................        773        888      1,028
  Four years later..................................................        774        832
  Five years later..................................................        742
CUMULATIVE REDUNDANCY (DEFICIENCY)..................................         66         77         58         84         67
PERCENTAGE..........................................................          8%         8%         5%         7%         4%
 
<CAPTION>
<S>                                                                   <C>
                                                                        1997
                                                                      ---------
GROSS RESERVE FOR CLAIMS AND CLAIMS EXPENSES:.......................  $   1,604
Reserve re-estimated as of:
  One year later....................................................
  Two years later...................................................
  Three years later.................................................
  Four years later..................................................
  Five years later..................................................
CUMULATIVE REDUNDANCY (DEFICIENCY)..................................
PERCENTAGE..........................................................
</TABLE>
 
RETROCESSION AGREEMENTS
 
    Reinsurance companies enter into retrocession arrangements to increase
aggregate premium capacity and to reduce the risk of loss on reinsurance
underwritten. Historically, the Company has obtained reinsurance for itself
primarily through excess of loss reinsurance agreements. The Company has also
obtained reinsurance protection against liability on a single event arising from
several different treaty obligations, and reinsurance protection against
liability arising from related losses involving more than one reinsured or
contract. The Company's retrocession agreements are generally structured on a
treaty basis, and cover both its treaty and facultative business. The Company
has occasionally purchased specific retrocessional protections for certain
business that may be specifically excluded from its retrocessional agreements.
 
    The Company retrocedes its risks to other reinsurers both through
reinsurance brokers and on a direct basis. The retrocession of risks
underwritten by the Company does not legally discharge the Company from
liability for any part of the risk reinsured. The Company would be required to
absorb the full amount of the loss associated with the reinsured risk if the
retrocessionnaire were unable to or failed to meet its reinsurance obligations
for any reason. The Company evaluates the financial condition of
retrocessionnaires prior to the commencement of underwriting activities and at
least annually thereafter. The Company utilizes financial guidelines to assess
the retrocessionnaires' ability to satisfy future claim obligations. The
Company's retrocessionnaires are subject to periodic evaluation to ensure that
there have been no significant adverse changes in their financial condition.
 
    In the case of retrocessionnaires that are unable to meet their obligation
under the retrocessional agreement or do not satisfy the Company's financial
guidelines, a reserve for actual and potential non-recovery is established,
which includes a provision for paid and unpaid claims and claims expenses,
inclusive of IBNR claims. The reserve for non-recoveries is continually reviewed
and updated to reflect current activity and developments. The Company evaluates
its exposure to reinsurance recoveries after considering the extent to which it
has collateralized the retrocessionnaires' balances by letters of credit, trust
accounts or funds withheld.
 
    At December 31, 1997, the Company had reinsurance recoverables, exclusive of
available offsets, in the form of letters of credit, trust accounts and funds
withheld, totaling $238.8 million, with approximately 165 domestic and 147
foreign retrocessionnaires. The Company had no amounts recoverable from a single
entity or group of entities that exceeded 5% of stockholders' equity as of
December 31, 1997.
 
                                       8
<PAGE>
    The Company evaluates its retrocessional requirements in relation to many
factors, including its surplus capacity, gross line capacity (amount of risk of
loss assumed on any one contract) and changing market conditions. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and Note 6 of the Notes to Consolidated Financial Statements for
information regarding the Company's retrocessional arrangements.
 
    The following discussion outlines the Company's gross lines and net
retentions for the years indicated.
 
1998
 
    The following table summarizes the Company's expected gross lines, initial
and maximum retentions on any one claim for 1998:
 
<TABLE>
<CAPTION>
                                                                                           (IN MILLIONS)
                                                                                  -------------------------------
<S>                                                                               <C>       <C>           <C>
                                                                                  GROSS      INITIAL      MAXIMUM
                                                                                   LINE     RETENTION     RETENTION
                                                                                  ------    ---------     -------
Casualty Treaty and Casualty Facultative Automatics.............................  $  7.5(1)   $5.0         $5.0(2)
Casualty Facultative (3)........................................................  $  7.5      $3.0         $3.0
Property Treaty.................................................................  $  7.5(1)   $3.0         $5.0(4)
Property Facultative............................................................  $100.0      $3.0         $3.0
Surety..........................................................................  $ 20.0(5)   $2.0         $4.0
Ocean Marine....................................................................  $ 25.0(6)   $1.0         $1.0
</TABLE>
 
- ------------------------
 
(1) The Company has reinsurance protection which provides additional per risk or
    per occurrence protection in excess of $7.5 million.
 
(2) The maximum retention could increase to $10 million in certain limited
    circumstances.
 
(3) Individual risk only.
 
(4) The maximum retention could increase to $6.2 million in certain limited
    circumstances.
 
(5) Per Principal.
 
(6) Per Event.
 
    The Company's 1998 reinsurance program for multiple claims arising from two
or more risks in a single occurrence or event is indicated below:
 
    PROPERTY--Property business is protected by two sets of retrocessional
agreements. The first set of agreements provides protection for a total of $97
million in excess of an initial retention of $5 million for loss events within
the United States and Canada. NAC's retention gradually increases up to an
additional $3 million should gross losses exceed $60 million. The second set of
agreements provides protection for loss events that occur outside of United
States and Canada for 100% of $65 million in excess of an initial retention of
$5 million. Both sets of agreements are on a first and second event basis.
 
    WORKERS' COMPENSATION--100% of $195 million in excess of a $5 million
retention for any one occurrence.
 
    CASUALTY CONTINGENCY COVER--100% of $25 million in excess of $5 million for
any one occurrence.
 
    In addition to the above reinsurance protections, the Company has coverage
in the event the accident year claims and claims expense ratio exceeds a
predetermined amount.
 
                                       9
<PAGE>
1997
 
    The following table summarizes the Company's gross lines, initial and
maximum retentions on any one claim for 1997:
 
<TABLE>
<CAPTION>
                                                                                           (IN MILLIONS)
                                                                                  -------------------------------
<S>                                                                               <C>       <C>           <C>
                                                                                  GROSS      INITIAL      MAXIMUM
                                                                                   LINE     RETENTION     RETENTION
                                                                                  ------    ---------     -------
Casualty Treaty and Casualty Facultative Automatics.............................  $  7.5(1)   $5.0         $5.0(2)
Casualty Facultative (3)........................................................  $  7.5      $3.0         $3.0
Property Treaty.................................................................  $  7.5(1)   $3.0         $5.0(4)
Property Facultative............................................................  $100.0      $3.0         $3.0
Surety..........................................................................  $ 20.0(5)   $2.0         $4.0
Ocean Marine....................................................................  $ 20.0(6)   $1.0         $1.0
</TABLE>
 
- ------------------------
 
(1) The Company has reinsurance protection which provides additional per risk or
    per occurrence protection in excess of $7.5 million.
 
(2) The maximum retention could increase to $10 million in certain limited
    circumstances.
 
(3) Individual risk only.
 
(4) The maximum retention could increase to $6.2 million in certain limited
    circumstances.
 
(5) Per Principal.
 
(6) Per Event.
 
    The Company's 1997 reinsurance program for multiple claims arising from two
or more risks in a single occurrence or event is indicated below:
 
    PROPERTY--Property business is protected by a series of retrocessional
agreements which provide protection for 100% of $115 million in excess of $5
million on a first and second event. Within the Company's $115 million of
catastrophe protection, $25 million of protection in excess of the first $55
million of protection, is available only if industry-wide claims exceed certain
minimum levels.
 
    WORKERS' COMPENSATION--100% of $195 million in excess of a $5 million
retention for any one occurrence.
 
    CASUALTY CONTINGENCY COVER--100% of $25 million in excess of $5 million for
any one occurrence.
 
    In recognition of the Company's strong surplus position and financial
capacity, and the continued positive contribution of business written since
1986, the Company terminated two retrocessional programs effective January 1,
1997. The Company received total consideration of approximately $225 million
representing reinsurance recoverable balances for unpaid claims and claims
expenses of approximately the same amount. The termination of these programs has
resulted in an increase in net retention levels for the years 1996 and prior.
Particularly as the casualty book of business matures, the increase in net
retentions for these years may result in increased volatility in future years to
the extent the actual frequency and severity of claims differs from management's
current estimates. The Company believes its exposure to such volatility is
within acceptable levels. Refer to the following tables and discussion for the
impact of the termination on the Company's 1996 retrocessional programs.
 
                                       10
<PAGE>
1996
 
    The following table summarizes the Company's gross lines, initial and
maximum retention on any one claim for 1996:
<TABLE>
<CAPTION>
                                                                                    (IN MILLIONS)
                                                     ---------------------------------------------------------------------------
<S>                                                  <C>        <C>              <C>              <C>              <C>
                                                                       INITIAL RETENTION                MAXIMUM RETENTION
                                                                --------------------------------  ------------------------------
 
<CAPTION>
                                                       GROSS        BEFORE            AFTER           BEFORE           AFTER
                                                       LINE       TERMINATION      TERMINATION      TERMINATION     TERMINATION
                                                     ---------  ---------------  ---------------  ---------------  -------------
<S>                                                  <C>        <C>              <C>              <C>              <C>
Casualty Treaty and Casualty Facultative...........  $     7.5     $     2.0        $     7.5        $     5.0       $     7.5
Property Treaty....................................  $     7.5     $     2.0        $     7.5        $     4.0       $     7.5
Property Facultative...............................  $    75.0     $     2.0        $     5.0        $     3.7       $     5.0
Surety.............................................  $    20.0     $     2.0        $     7.5        $     4.0       $    12.5
</TABLE>
 
    The Company's 1996 reinsurance program for multiple claims arising from two
or more risks in a single occurrence or event is indicated below:
 
    PROPERTY--Property business is protected by a series of reinsurance
agreements which provide protection for 100% of $120 million in excess of $5
million on a first and second event. Certain of the Company's retrocessional
protection is available only if industry-wide claims exceed certain minimum
levels. Within the Company's $120 million of catastrophe protection, $30 million
of coverage, in excess of the first $60 million of coverage, is available only
if industry-wide claims exceed certain minimum levels. As a result of the
termination of the retrocessional programs, the protection has been reduced by
$10 million, increasing the Company's initial and maximum retentions to $10
million and $15 million, respectively. This coverage was not subject to an
industry-wide claims minimum. The Company is unaware of any property catastrophe
claim in excess of $5 million that would initiate this coverage.
 
    WORKERS' COMPENSATION--100% of $195 million in excess of a $5 million
retention for any one occurrence. This protection was not affected by the
termination of the retrocessional programs.
 
    CASUALTY CONTINGENCY COVER--100% of $25 million in excess of $5 million for
any one occurrence. As a result of the termination of the retrocessional
programs, the protection has been reduced by $10.8 million, increasing the
Company's initial and maximum retentions to $7.5 million and $15.8 million,
respectively. However, the maximum retention could exceed these retention levels
should the net loss from any one insured or reinsured exceed the casualty
contingency agreements' maximum net retention warranty. The maximum net
retention warranty for 1996 was $5 million for treaty and facultative automatics
and $3.7 million for individual risk facultative certificates.
 
INVESTMENTS
 
    The Finance and Investment Committee (the "Committee") of NAC Re's Board of
Directors is responsible for establishing investment policy and guidelines and
for overseeing their execution. The Company utilizes independent investment
advisors to manage its investment portfolio within the established guidelines.
These advisors are required to report investment transaction activities and
portfolio results on a periodic basis and to meet periodically with the
Committee to review and discuss portfolio structure, security selection and
performance results.
 
    The investment strategy, established by the Committee and management,
focuses on income predictability and asset value stability. Accordingly, the
Company emphasizes investment grade fixed maturity securities. For statutory
accounting purposes, investment grade securities are recorded at amortized cost
and, therefore, statutory surplus is not impacted by fluctuations in their
market value. For GAAP reporting purposes, all of the Company's fixed maturities
and equity securities are categorized as available for sale and are recorded at
their fair value. Periodic changes in fair value are recorded directly in the
Company's stockholders' equity, net of applicable deferred taxes.
 
                                       11
<PAGE>
    A summary of the Company's investment portfolio as of December 31, 1997 and
1996 is set forth below:
<TABLE>
<CAPTION>
                                                                                   (IN THOUSANDS)
                                                                                    DECEMBER 31,
                                                                 ---------------------------------------------------
<S>                                                              <C>           <C>          <C>           <C>
                                                                           1997                       1996
                                                                 -------------------------  ------------------------
 
<CAPTION>
                                                                   CARRYING       % OF        CARRYING       % OF
                                                                    VALUE       PORTFOLIO      VALUE      PORTFOLIO
                                                                 ------------  -----------  ------------  ----------
<S>                                                              <C>           <C>          <C>           <C>
Cash and short-term............................................  $    116,919         5.0%  $    100,746         5.1%
                                                                 ------------       -----   ------------  ----------
Fixed maturities:
  U.S. Treasury................................................        14,507         0.6         70,608         3.6
  Tax-exempt...................................................     1,250,973        53.3        848,390        42.8
  Foreign Government...........................................       172,321         7.3        161,988         8.1
  Corporate....................................................       425,857        18.1        376,826        19.0
  Mortgage-backed..............................................       216,845         9.2        189,748         9.6
  Subordinated convertibles....................................         8,085         0.4         55,977         2.8
                                                                 ------------       -----   ------------  ----------
  Subtotal.....................................................     2,088,588        88.9      1,703,537        85.9
                                                                 ------------       -----   ------------  ----------
Equity securities..............................................       142,527         6.1        179,619         9.0
                                                                 ------------       -----   ------------  ----------
  Total........................................................  $  2,348,034       100.0%  $  1,983,902       100.0%
                                                                 ------------       -----   ------------  ----------
                                                                 ------------       -----   ------------  ----------
</TABLE>
 
    Guidelines established by the Committee restrict the portion of the
portfolio that can be held in lower rated or non-investment grade securities.
Consistent with the Company's focus on asset quality, at December 31, 1997,
approximately 94% of the Company's fixed maturity investments were considered
"investment grade" by Moody's Investor Services, Inc., ("Moody's") or S&P.
 
    The guidelines also address portfolio diversification by establishing
certain restrictions regarding the portion of the investment portfolio that can
be invested in a particular security, issuer, an industry sector or, in the case
of tax-exempt securities, in a state or municipality. Such restrictions do not
apply to investments in direct or indirect obligations of the U.S. Government
(i.e., US Treasury and GNMA Securities), which comprised 3.2% of the Company's
cash and invested assets at December 31, 1997.
 
    The portfolio guidelines generally prohibit investment in derivative
products (i.e., products which include features such as futures, forwards,
swaps, options and other investments with similar characteristics), without
prior approval and written authorization by the Committee. Such authorization
would be provided only after obtaining regulatory approval and evaluating a
written plan submitted by the advisor which documents the strategy, the
objective, a description of the size and nature of each transaction, the
expected return, the costs/benefits, and the possible risk factors. The Company
did not own any derivative investment products as of December 31, 1997.
 
    The portfolio guidelines permit the purchase of certain securities which
derive their values or their contractually required cash flows from other
securities, such as mortgage-backed securities, where the underlying collateral
is a pool of residential or commercial real estate mortgages. These securities
are generally considered to have high credit quality since they are either
government or quasi-government agency-backed or are equivalent to a "AAA"
rating. The risks associated with mortgage-backed securities are interest rate
risk (as with all fixed-rate securities) and prepayment risk or extension risk
which may result in a decline in the expected return and/or value of the
security. Prepayment or extension of principal payments occur and can be
exacerbated depending upon the level of interest rates in the marketplace.
Mortgage-backed securities in the Company's investment portfolio totaled $216.8
million at December 31, 1997, of which 40.9% are collateralized mortgage
obligations (CMO's) which generally reduce the uncertainty concerning the
maturity of a mortgage-backed security.
 
                                       12
<PAGE>
    Uncertainties exist regarding interest rates and inflation and their
potential impact on the market values of the Company's fixed income securities.
The Company actively considers the risks and financial rewards associated with
the maturity distribution of its fixed income portfolio. In this regard, the
Company takes into consideration the pattern of expected claims payments and the
Company's future cash flow projections in evaluating its investment
opportunities. Consistent with the payment profile of the Company's claims
reserve liabilities, and based upon the expected maturity of fixed maturity
investments as of December 31, 1997, the Company's fixed maturity investments
which include mortgage-backed securities but exclude convertible securities, had
an expected average maturity of 7.9 years.
 
    A summary of expected maturities of the Company's fixed maturity investments
is set forth below:
 
<TABLE>
<CAPTION>
                                                                         (IN THOUSANDS)
                                                                        DECEMBER 31, 1997
                                                                 -------------------------------
<S>                                                              <C>             <C>
                                                                 CARRYING VALUE  % OF PORTFOLIO
                                                                 --------------  ---------------
Less than 1 year...............................................   $     22,553            1.1%
1-5 years......................................................        608,280           29.1
6-10 years.....................................................      1,020,735           48.8
11-15 years....................................................        337,877           16.2
16-20 years....................................................         18,775            0.9
More than 20 years.............................................         72,283            3.5
                                                                 --------------         -----
Subtotal.......................................................      2,080,503           99.6
Convertibles...................................................          8,085            0.4
                                                                 --------------         -----
      Total....................................................   $  2,088,588          100.0%
                                                                 --------------         -----
                                                                 --------------         -----
</TABLE>
 
    The balance of the Company's investment portfolio at December 31, 1997,
consisting of cash, short-term investments and equity securities, amounted to
$259.4 million. The Company's equity investment strategy is designed to build a
quality equity portfolio. As of December 31, 1997, the Company held $142.5
million or 6.1% of cash and invested assets in equity securities, representing
20.3% of statutory surplus. The Company does not hold any direct investments in
real estate. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations" for further discussion of the Company's investing
activities and results.
 
RATINGS
 
    NAC, Greenwich, Indian Harbor and NAC Re International, comprising the NAC
Re group of companies, have been assigned an "A+" (Superior) rating as
determined by A.M. Best, and published in A.M. Best Rating Service,
Property/Casualty Edition. An "A+", which is A.M. Best's second highest rating,
is assigned to companies which have demonstrated superior overall performance
when compared to established standards. Such companies are considered by A.M.
Best to have demonstrated a very strong ability to meet their obligations to
policyholders over a long period of time.
 
    NAC and its domestic subsidiaries, as well as NAC Re International, have
been assigned a "AA-" claims-paying rating from S&P, which is S&P's fourth
highest rating. A "AA-" is assigned to insurers that offer excellent financial
security. The Company's capacity to meet policyholder obligations is considered
strong under a variety of economic and underwriting conditions. NAC Re
International is supported by a Net Worth Maintenance Agreement with NAC
pursuant to which NAC has agreed to provide certain specified financial support
to NAC Re International in meeting its regulatory standards and liquidity needs,
subject to regulatory requirements on NAC.
 
    Both the A.M. Best rating and S&P claims-paying rating are based upon
factors of concern to policyholders and should not be considered an indication
of the degree or lack of risk involved in an equity investment in an insurance
or reinsurance company.
 
                                       13
<PAGE>
    NAC Re debt instruments have the following investment grade ratings from S&P
and Moody's:
 
<TABLE>
<CAPTION>
                                                                                                   S&P       MOODY'S
                                                                                                ---------  -----------
<S>                                                                                             <C>        <C>
$100 Million 8% Senior Notes due 1999.........................................................         A-        Baa1
$100 Million 7.15% Senior Notes due 2005......................................................         A-        Baa1
$100 Million 5.25% Convertible Subordinated Debentures due 2002...............................       BBB+        Baa2
</TABLE>
 
    Debt ratings are a current assessment of the credit-worthiness of an obligor
with respect to a specific obligation. A company with a debt rating of "A-" is
considered by S&P to have a strong capacity to pay interest and repay principal,
although it is somewhat more susceptible to the adverse effects of changes in
circumstances and economic conditions than debt in higher rated categories. A
company with a debt rating of "BBB+" by S&P and "Baa1" and "Baa2" by Moody's is
considered to have adequate capacity to pay interest and repay principal but
capacity to meet long-term obligations is susceptible to adverse economic
conditions or changing circumstances.
 
    All of the above-mentioned ratings are continually monitored and readjusted
by each of the rating agencies. While the Company believes that it will maintain
and could possibly improve its ratings over time, there is no assurance that it
will continue to receive these favorable ratings in the future.
 
EMPLOYEES
 
    At December 31, 1997, the Company had 315 full-time employees, including 43
employees in the Company's international operation. The Company's employees are
not represented by a labor union and the Company believes that its employee
relations are good.
 
ITEM 2. PROPERTIES
 
    The Company leases its present corporate and administrative offices in a
building located in Greenwich, Connecticut. The Company also has operating
leases for office space at regional branch locations and its international
subsidiary. See Note 7 of Notes to the Consolidated Financial Statements of NAC
Re for a schedule on future minimum rentals related to the Company's operating
leases.
 
ITEM 3. LEGAL PROCEEDINGS
 
    NAC, Greenwich and Indian Harbor are parties to various lawsuits generally
arising in the normal course of their business. The Company does not believe
that the eventual outcome of any of the litigations to which NAC, Greenwich or
Indian Harbor are a party will have a material effect on the Company's financial
condition. NAC has been fully indemnified by The Continental Corporation and its
successor, CNA Insurance, for any losses incurred by Greenwich from events
occurring prior to NAC's acquisition of Greenwich.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
    There were no matters submitted to a vote of security holders during the
fourth quarter of 1997.
 
                                       14
<PAGE>
                                    PART II
 
ITEM 5. MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS
 
MARKET INFORMATION
 
    The Common Stock ($.10 par value) of NAC Re is traded on the New York Stock
Exchange (NYSE) under the symbol NRC. For the periods presented below, the high
and low sales price and close prices of the Common Stock as reported by the NYSE
were as follows:
<TABLE>
<CAPTION>
                                                                         THREE MONTHS ENDED
                                                       ------------------------------------------------------
<S>                                                    <C>          <C>          <C>            <C>
                                                        MARCH 31,    JUNE 30,    SEPTEMBER 30,  DECEMBER 31,
                                                          1997         1997          1997           1997
                                                       -----------  -----------  -------------  -------------
High.................................................   $   39.88    $   49.00     $   51.56      $   52.88
Low..................................................   $   33.25    $   35.50     $   45.50      $   43.50
Close................................................   $   35.63    $   48.38     $   51.38      $   48.81
 
<CAPTION>
 
                                                                         THREE MONTHS ENDED
                                                       ------------------------------------------------------
                                                        MARCH 31,    JUNE 30,    SEPTEMBER 30,  DECEMBER 31,
                                                          1996         1996          1996           1996
                                                       -----------  -----------  -------------  -------------
<S>                                                    <C>          <C>          <C>            <C>
High.................................................   $   36.25    $   33.88     $   40.63      $   37.63
Low..................................................   $   31.75    $   28.50     $   30.25      $   32.63
Close................................................   $   32.63    $   33.50     $   36.00      $   33.88
</TABLE>
 
STOCKHOLDERS
 
    There were 392 holders of record of shares of Common Stock as of March 3,
1998. Cede & Company held over 97% of the outstanding shares as nominee for an
unknown number of beneficial stockholders.
 
DIVIDENDS
 
    The Company declared a quarterly cash dividend of $.05 per share for March
1996 and increased this to $.06 per share for June 1996 through March 1997. In
June 1997, the Company increased its quarterly dividend to $.075 per share. The
Company considers increasing the dividend on its Common Stock from time to time.
There is presently no intention to decrease the cash dividend in the foreseeable
future. Future dividends will be dependent upon, among other factors, the
earnings of the Company, its financial condition, its capital requirements,
general business conditions and the ability of NAC to pay dividends to NAC Re.
 
    For a description of restrictions on NAC's ability to pay dividends,
reference is made to Note 11 of Notes to the Consolidated Financial Statements
of NAC Re.
 
ITEM 6. SELECTED FINANCIAL DATA
 
    The selected financial data included in the "Eleven Year Financial Summary"
on pages 34 through 35 of NAC Re's 1997 Annual Report to Shareholders is
incorporated herein by reference.
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
  OF OPERATIONS
 
    Management's Discussion and Analysis of Financial Condition and Results of
Operations on pages 20 through 33 of NAC Re's 1997 Annual Report to Shareholders
is incorporated herein by reference.
 
                                       15
<PAGE>
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
    The following consolidated financial statements of NAC Re and its subsidiary
companies, included on pages 36 through 64 of NAC Re's 1997 Annual Report to
Shareholders, are incorporated herein by reference:
 
    --Consolidated Balance Sheet at December 31, 1997 and 1996.
 
    --Consolidated Statement of Income for the years ended December 31, 1997,
1996 and 1995.
 
    -- Consolidated Statement of Stockholders' Equity for the years ended
      December 31, 1997, 1996 and 1995.
 
    -- Consolidated Statement of Cash Flows for the years ended December 31,
      1997, 1996 and 1995.
 
    --Notes to Consolidated Financial Statements.
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
  FINANCIAL DISCLOSURES
 
    None.
 
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS
 
    Incorporated by reference to the caption "Directors and Executive Officers"
in the definitive proxy statement involving the election of directors and other
matters (the "Proxy Statement") which NAC Re intends to file with the Commission
pursuant to Regulation 14A under the Securities Exchange Act of 1934 not later
than 120 days after December 31, 1997.
 
ITEM 11. EXECUTIVE COMPENSATION
 
    Incorporated by reference to the caption "Compensation of Directors and
Executive Officers" in the Proxy Statement.
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    Incorporated by reference to the caption "Security Ownership of Certain
Beneficial Owners and Management" in the Proxy Statement.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    Incorporated by reference to the captions "Certain Relationships and Related
Transactions" and "Compensation Committee Interlocks and Insider Participation"
in the Proxy Statement.
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
 
FINANCIAL STATEMENTS AND SCHEDULES
 
    The Financial Statements and schedules listed in the accompanying Index to
Financial Statements and Schedules on page F-1 are filed as part of this report.
 
                                       16
<PAGE>
EXHIBITS
 
    The exhibits listed on the Index to Exhibits set forth below are filed as
part of this report.
 
<TABLE>
<CAPTION>
EXHIBIT NO.
- -----------
<C>          <C>        <S>
 
 (3)            --      Articles of incorporation and bylaws:
 
        3.1     --      Restated Certificate of Incorporation of NAC Re incorporated herein by reference to Exhibit 3.1 to
                        the Annual Report on Form 10-K of NAC Re for the year ended December 31, 1990
 
        3.2     --      Bylaws of NAC Re as amended through June 9, 1988 incorporated herein by reference to Exhibit 3.2 to
                        the Annual Report on Form 10-K of NAC Re for the year ended December 31, 1988 (the "1988 10-K")
 
 (4)            --      Instruments defining rights of security holders, including indentures:
 
        4.1     --      Rights Agreement dated as of June 9, 1988 by and between NAC Re Corporation and American Stock
                        Transfer and Trust Company (the "Rights Agreement") incorporated herein by reference to Exhibit A
                        to the Current Report on Form 8-K filed June 24, 1988
 
        4.2     --      First Amendment to the Rights Agreement dated as of March 28, 1990 incorporated herein by reference
                        to Exhibit A to the Current Report on Form 8-K filed April 2, 1990
 
        4.3     --      Second Amendment to the Rights Agreement dated as of September 13, 1990 incorporated herein by
                        reference to Exhibit 4.3 to the Current Report on Form 8-K filed September 21, 1990
 
 (10)           --      Material contracts:
 
       10.1     --      Lease of NAC Re's corporate and administrative offices in Greenwich, CT incorporated herein by
                        reference to Exhibit 10.11 to the Annual Report on Form 10-K for the year ended December 31, 1985
 
       10.2     --      Form of Sublease between NAC Re and NAC incorporated herein by reference to Exhibit 10.16 to the
                        Joint Proxy Statement/Prospectus on Form S-4 (No. 33-8836) of NAC Re and KCC
 
      *10.3     --      Amended 1985 Stock Option Plan of NAC Re incorporated herein by reference to Exhibit 10.6 to the
                        Registration Statement on Form S-1 (No. 2-99952)
 
      *10.4     --      1986 Incentive and Non-qualified Stock Option Plan of NAC Re incorporated herein by reference to
                        Exhibit 10.12 to the Registration Statement on Form S-1 (No. 33-5198)
 
      *10.5     --      NAC Re Corp. 1989 Stock Option Plan incorporated herein by reference to Exhibit 4.2 to the
                        Registration Statement on Form S-8 (No. 33-27745)
 
      *10.6     --      NAC Re Corp. 1993 Stock Option Plan incorporated herein by reference to Exhibit A to the definitive
                        Proxy Statement filed with the Securities and Exchange Commission on March 26, 1993 ("1993 Proxy
                        Statement")
 
      *10.7     --      Amended and Restated NAC Re Corp. Directors' Stock Option Plan incorporated herein by reference to
                        Exhibit B to the 1993 Proxy Statement
 
      *10.8     --      Amended and Restated NAC Re Corp. Benefits Equalization Plan incorporated herein by reference to
                        Exhibit 10.8 to the Annual Report on Form 10-K for the year ended December 31, 1993 (the "1993
                        10-K")
</TABLE>
 
                                       17
<PAGE>
<TABLE>
<CAPTION>
EXHIBIT NO.
- -----------
<C>          <C>        <S>
      *10.9     --      Amended and Restated NAC Re Corp. Excess Benefit Savings Plan incorporated herein by reference to
                        Exhibit 10.9 to the 1993 10-K
 
     *10.10     --      Form of Severance Contract between NAC Re Corp. and the executive officers of NAC Re incorporated
                        herein by reference to Exhibit 10.23 to the 1988 10-K
 
     *10.11     --      NAC Re Corp. Amended and Restated Annual Incentive Plan incorporated herein by reference to Exhibit
                        10.17 to the Annual Report on Form 10-K of NAC Re for the year ended December 31, 1991 (the "1991
                        10-K")
 
     *10.12     --      NAC Re Corp. Long-term Incentive Plan incorporated herein by reference to Exhibit 10.12 to the
                        Annual Report on Form 10-K of NAC Re for the year ended December 31, 1994 (the "1994 10-K")
 
     *10.13     --      Employment contract with Ronald L. Bornhuetter dated as of March 4, 1992 incorporated herein by
                        reference to Exhibit 10.19 to the 1991 10-K
 
     *10.14     --      Trust Agreement, dated as of July 1, 1989, between NAC Re and Marine Midland Bank, N.A. relating to
                        supplemental pension benefits for Ronald L. Bornhuetter incorporated herein by reference to Exhibit
                        10.22 to the Annual Report on Form 10-K of NAC Re for the year ended December 31, 1989 (the "1989
                        10-K")
 
     *10.15     --      NAC Re Corp. Directors' Deferred Compensation Agreement incorporated herein by reference to Exhibit
                        10.20 to the 1989 10-K
 
     *10.16     --      Consulting Agreement with Michael G. Fitt effective as of March 1, 1995 incorporated herein by
                        reference to Exhibit 10.17 to the 1994 10-K
 
     *10.17     --      Employment contract with Ronald L. Bornhuetter dated as of October 30, 1996 incorporated herein by
                        reference to Exhibit 10.17 to the Annual Report on Form 10-K for year ended December 31, 1996 (the
                        "1996 10-K")
 
     *10.18     --      Employment contract with Nicholas M. Brown, Jr., dated as of October 30, 1996 incorporated herein
                        by reference to Exhibit 10.18 to the 1996 10-K
 
     *10.19     --      Form of Employment contract with Executive Vice Presidents dated as of October 30, 1996
                        incorporated herein by reference to Exhibit 10.19 to the 1996 10-K
 
     *10.20     --      1997 Incentive and Capital Accumulation Plan incorporated herein by reference to Exhibit A to the
                        definitive Proxy Statement filed with The Securities and Exchange Commission on March 26, 1997
 
     *10.21     --      1997 Stock Retainer Plan For Nonemployee Directors
 
 (11)           --      Statement regarding computation of per share earnings incorporated herein by reference to Note 12
                        of the Notes to the Consolidated Financial Statements on page 62 of NAC Re's 1997 Annual Report to
                        Shareholders
 
 (12)           --      Statement regarding computation of ratios
 
 (13)           --      NAC Re's 1997 Annual Report to Shareholders only those portions thereof which are expressly
                        incorporated by reference in NAC Re's Annual Report on Form 10-K for 1997, are "filed" as part of
                        this Annual Report on Form 10-K
 
 (21)           --      Subsidiaries of the registrant
 
 (23)           --      Consents of experts and counsel
 
 (24)           --      Powers of attorney
</TABLE>
 
                                       18
<PAGE>
<TABLE>
<CAPTION>
EXHIBIT NO.
- -----------
<C>          <C>        <S>
 (27.1)         --      Financial Data Schedule fiscal year end 1997
 
 (27.2)         --      Financial Data Schedule fiscal year end 1995, 1996, and quarters 1, 2, 3, of 1996. Per share data
                        restated per SFAS No. 128
 
 (27.3)         --      Financial Data Schedule quarters 1, 2, 3, of 1997. Per share data restated per SFAS No. 128
</TABLE>
 
- ------------------------
 
*   Executive Compensation Plans or Arrangements
 
REPORTS ON FORM 8-K
 
    There were no reports on Form 8-K filed with the Securities and Exchange
Commission during the fourth quarter of 1997.
 
EXECUTIVE COMPENSATION PLANS OR ARRANGEMENTS
 
    Executive compensation plans or arrangements are indicated by an asterisk on
the Index to Exhibits set forth above.
 
                                       19
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of Section 13 or 15 (d) of the Securities Act
of 1934, the registrant has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.
 
                                                 NAC RE CORP.
                                                 (Registrant)
 
                                By              /s/ JEROME T. FADDEN
                                     -----------------------------------------
                                                  Jerome T. Fadden
                                          VICE PRESIDENT, CHIEF FINANCIAL
                                               OFFICER AND TREASURER
 
Dated: March 24, 1998
 
    Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
registrant and in the capacities and on the dates indicated.
 
          SIGNATURE                        TITLE                    DATE
- ------------------------------  ---------------------------  -------------------
    RONALD L. BORNHUETTER*      Director, Chairman and
- ------------------------------    Chief Executive Officer      March 24, 1998
    RONALD L. BORNHUETTER
   NICHOLAS M. BROWN, JR.*      Director, President and
- ------------------------------    Chief Operating Officer      March 24, 1998
    NICHOLAS M. BROWN, JR.
      ROBERT A. BELFER*         Director
- ------------------------------                                 March 24, 1998
       ROBERT A. BELFER
      JOHN P. BIRKELUND*        Director
- ------------------------------                                 March 24, 1998
      JOHN P. BIRKELUND
      C. W. CARSON, JR.*        Director
- ------------------------------                                 March 24, 1998
      C. W. CARSON, JR.
         DAN CIAMPA*            Director
- ------------------------------                                 March 24, 1998
          DAN CIAMPA
        TODD G. COLE*           Director
- ------------------------------                                 March 24, 1998
         TODD G. COLE
       MICHAEL G. FITT*         Director
- ------------------------------                                 March 24, 1998
       MICHAEL G. FITT
     DANIEL J. MCNAMARA*        Director
- ------------------------------                                 March 24, 1998
      DANIEL J. MCNAMARA
       STEPHEN ROBERT*          Director
- ------------------------------                                 March 24, 1998
        STEPHEN ROBERT
   HERBERT S. WINOKUR, JR.*     Director
- ------------------------------                                 March 24, 1998
   HERBERT S. WINOKUR, JR.
     /s/ JEROME T. FADDEN       Vice President, Chief
- ------------------------------    Financial Officer and        March 24, 1998
       JEROME T. FADDEN           Treasurer
 
- ------------------------
 
*   By CELIA R. BROWN, his attorney-in-fact and agent, pursuant to a power of
    attorney, a copy of which has been filed with the Securities and Exchange
    Commission as Exhibit 24 hereto.
 
<TABLE>
<C>                                                   <S>        <C>
                                                      By:                         /s/ CELIA R. BROWN
                                                                      -----------------------------------------
                                                                                    Celia R. Brown
                                                                                      SECRETARY
</TABLE>
 
                                       20
<PAGE>
                  INDEX TO FINANCIAL STATEMENTS AND SCHEDULES
 
<TABLE>
<CAPTION>
NAC RE CORP.                                                                                PAGES
                                                                                          ---------
 
<S>        <C>                                                                            <C>
           Report of Independent Auditors on Financial Statements and Schedules.........        F-2
 
           Consolidated Balance Sheet at December 31, 1997 and 1996.....................          *
 
           Consolidated Statement of Income for the years ended December 31, 1997, 1996
             and 1995...................................................................          *
 
           Consolidated Statement of Stockholders' Equity for the years ended December
             31, 1997, 1996 and 1995....................................................          *
 
           Consolidated Statement of Cash Flows for the years ended December 1997, 1996
             and 1995...................................................................          *
 
           Notes to Consolidated Financial Statements...................................          *
 
SCHEDULES
 
I          Summary of Investments Other Than Investments in Related Parties at December
             31, 1997...................................................................        S-1
 
II         Condensed Financial Information of Registrant................................    S-2-S-4
 
III        Supplementary Insurance Information for the years ended December 31, 1997,
             1996, and 1995.............................................................        S-5
 
IV         Reinsurance for the years ended December 31, 1997, 1996 and 1995.............        S-6
 
VI         Supplementary Information Concerning Property-Casualty Insurance
             Operations.................................................................        S-7
 
           Schedules other than those listed above are omitted for the reason that they are not
             applicable.
</TABLE>
 
- ------------------------
 
*   Incorporated by reference to NAC Re's 1997 Annual Report to Shareholders.
 
                                      F-1
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors and Shareholders of
NAC RE CORPORATION:
 
    We have audited the consolidated balance sheet of NAC Re Corporation and
subsidiaries as of December 31, 1997 and 1996 and the related consolidated
statements of income, stockholders' equity and cash flows for each of the three
years in the period ended December 31, 1997 incorporated by reference at Item 8.
Our audits also included the financial statement schedules listed in the Index
at Item 14. These financial statements and schedules are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements and 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 consolidated financial position of
NAC Re Corporation and subsidiaries at December 31, 1997 and 1996, and the
consolidated results of their operations and cash flows for each of the three
years in the 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 financial
statements taken as a whole, present fairly in all material respects, the
information set forth therein.
 
                                          ERNST & YOUNG LLP
 
New York, New York
February 3, 1998
 
                                      F-2
<PAGE>
                                                                      SCHEDULE I
 
                         NAC RE CORP. AND SUBSIDIARIES
 
                   OTHER THAN INVESTMENTS IN RELATED PARTIES
                             SUMMARY OF INVESTMENTS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                     DECEMBER 31, 1997
                                                                         -----------------------------------------
<S>                                                                      <C>           <C>           <C>
                                                                                                       AMOUNT AT
                                                                                                         WHICH
                                                                          AMORTIZED       MARKET     SHOWN IN THE
                                                                             COST         VALUE      BALANCE SHEET
                                                                         ------------  ------------  -------------
Type of Investment:
FIXED MATURITY SECURITIES
  United States Government.............................................  $     13,957  $     14,507   $    14,507
  Foreign Governments..................................................       166,899       172,321       172,321
  Mortgage-backed securities...........................................       212,434       216,845       216,845
  States, municipalities and political subdivisions....................     1,200,314     1,250,973     1,250,973
  Corporate bonds......................................................       419,715       425,857       425,857
  Subordinated convertibles............................................         8,182         8,085         8,085
                                                                         ------------  ------------  -------------
      Total Fixed Maturities...........................................     2,021,501     2,088,588     2,088,588
EQUITY SECURITIES......................................................       124,999       142,527       142,527
CASH AND SHORT-TERM INVESTMENTS........................................       116,919       116,919       116,919
                                                                         ------------  ------------  -------------
      Total Investments................................................  $  2,263,419  $  2,348,034   $ 2,348,034
                                                                         ------------  ------------  -------------
                                                                         ------------  ------------  -------------
</TABLE>
 
                                      S-1
<PAGE>
                                                                     SCHEDULE II
                         NAC RE CORP. AND SUBSIDIARIES
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
 
                                  NAC RE CORP.
                                 BALANCE SHEET
                                (PARENT COMPANY)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                                    DECEMBER 31,
                                                                                               ----------------------
<S>                                                                                            <C>         <C>
                                                                                                  1997        1996
                                                                                               ----------  ----------
ASSETS
Fixed maturities.............................................................................  $   25,283  $   30,066
Short-term investments.......................................................................       1,657       5,377
Cash.........................................................................................       3,186         266
Accrued investment income....................................................................         353         444
Deferred expenses............................................................................       1,527       1,865
Federal income tax recoverable...............................................................      --             940
Investment in wholly-owned subsidiaries......................................................     934,124     825,283
Fixed assets.................................................................................       9,614       7,679
Intercompany receivable, net.................................................................       8,813      --
Other assets.................................................................................       1,037         876
                                                                                               ----------  ----------
    Total assets.............................................................................  $  985,594  $  872,796
                                                                                               ----------  ----------
                                                                                               ----------  ----------
LIABILITIES
8% Notes due 1999............................................................................  $  100,000  $  100,000
7.15% Notes due 2005.........................................................................      99,942      99,934
5.25% Convertible Subordinated Debentures due 2002...........................................     100,000     100,000
Revolving credit loan........................................................................      12,924      12,924
Federal income tax payable...................................................................       9,318      --
Interest payable.............................................................................       1,587       1,537
Intercompany payable, net....................................................................      --             974
Dividend payable.............................................................................       1,372       1,104
Accrued expenses and other liabilities.......................................................       3,390       3,054
                                                                                               ----------  ----------
    Total liabilities........................................................................     328,533     319,527
                                                                                               ----------  ----------
STOCKHOLDERS' EQUITY
Preferred stock, $1.00 par value: 1,000 shares authorized, none issued (includes 90 shares of
  Series A Junior Participating Preferred Stock).............................................      --          --
Common stock, $.10 par value: 25,000 shares authorized (1997, 21,707; 1996, 21,464 issued)          2,171       2,146
Additional paid-in capital...................................................................     255,424     248,662
Unrealized appreciation of investments, net of tax...........................................      55,000      31,700
Currency translation adjustments, net of tax.................................................       5,989       8,377
Retained earnings............................................................................     426,309     335,868
Less treasury stock, at cost (1997, 3,398 shares; 1996, 3,061 shares)........................     (87,832)    (73,484)
                                                                                               ----------  ----------
    Total stockholders' equity...............................................................     657,061     553,269
                                                                                               ----------  ----------
    Total liabilities and stockholders' equity...............................................  $  985,594  $  872,796
                                                                                               ----------  ----------
                                                                                               ----------  ----------
</TABLE>
 
                                      S-2
<PAGE>
                                                                     SCHEDULE II
 
                         NAC RE CORP. AND SUBSIDIARIES
           CONDENSED FINANCIAL INFORMATION OR REGISTRANT--(CONTINUED)
                                  NAC RE CORP.
                              STATEMENT OF INCOME
                                (PARENT COMPANY)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
<S>                                                                                <C>        <C>        <C>
                                                                                     1997       1996       1995
                                                                                   ---------  ---------  ---------
INCOME
  Dividend declared from insurance subsidiary....................................  $  22,500  $  38,000  $   7,500
  Net investment income..........................................................      2,097      2,815      3,193
  Net investment (losses) gains..................................................        (14)        87        126
  Rental and other income........................................................      2,312      1,559      1,164
                                                                                   ---------  ---------  ---------
                                                                                      26,895     42,461     11,983
                                                                                   ---------  ---------  ---------
EXPENSES
  Interest and amortization expense..............................................     21,697     22,284     15,610
  Other operating costs and expenses.............................................      4,656      2,672      2,104
                                                                                   ---------  ---------  ---------
                                                                                      26,353     24,956     17,714
                                                                                   ---------  ---------  ---------
Income (loss) before intercompany tax allocation and equity in net income of
  wholly-owned subsidiaries less dividend declared...............................        542     17,505     (5,731)
                                                                                   ---------  ---------  ---------
Current intercompany tax credit..................................................      7,702      6,778      4,711
Deferred tax benefit.............................................................        190        424         41
                                                                                   ---------  ---------  ---------
Total tax credit, net............................................................      7,892      7,202      4,752
                                                                                   ---------  ---------  ---------
Income (loss) before equity in net income of wholly-owned subsidiaries less
  dividend declared..............................................................      8,434     24,707       (979)
Equity in net income of wholly-owned subsidiaries less dividend declared.........     87,243     45,813     63,803
                                                                                   ---------  ---------  ---------
Net income.......................................................................  $  95,677  $  70,520  $  62,824
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
</TABLE>
 
                                      S-3
<PAGE>
                                                                     SCHEDULE II
 
                         NAC RE CORP. AND SUBSIDIARIES
           CONDENSED FINANCIAL INFORMATION OR REGISTRANT--(CONTINUED)
 
                                  NAC RE CORP.
                            STATEMENT OF CASH FLOWS
                                (PARENT COMPANY)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                     YEAR ENDED DECEMBER 31,
                                                                               -----------------------------------
<S>                                                                            <C>         <C>         <C>
                                                                                  1997        1996        1995
                                                                               ----------  ----------  -----------
OPERATING ACTIVITIES
  Net income.................................................................  $   95,677  $   70,520  $    62,824
  Less equity in net income of subsidiaries, less cash dividend ($22,500 in
    1997, $38,000 in 1996, $7,500 in 1995)...................................      87,243      45,813       63,803
                                                                               ----------  ----------  -----------
                                                                                    8,434      24,707         (979)
Adjustments to reconcile net income to net cash provided by operating
  activities.................................................................       3,328       2,482        1,866
                                                                               ----------  ----------  -----------
Net cash provided by operating activities....................................      11,762      27,189          887
                                                                               ----------  ----------  -----------
INVESTING ACTIVITIES
  Sales of fixed maturity investments........................................      10,489       8,844        9,722
  Maturities of fixed maturity investments...................................       3,000       7,000        4,700
  Purchases of fixed maturity investments....................................      (8,435)    (12,425)     (10,527)
  Net sales (purchases) of short-term investments............................       3,720       9,553       (7,285)
  Purchases of furniture and equipment.......................................      (4,164)     (4,648)      (1,290)
  Contribution to subsidiary.................................................      --          --         (146,556)
                                                                               ----------  ----------  -----------
Net cash provided (used) by investing activities.............................       4,610       8,324     (151,236)
                                                                               ----------  ----------  -----------
FINANCING ACTIVITIES
  Issuance of shares.........................................................       5,864       1,951       52,056
  Net proceeds from issuance of 7.15% Notes..................................      --          --           99,214
  Purchase of treasury shares, net of reissuance.............................     (14,348)    (30,886)        (204)
  Cash dividends paid to stockholders........................................      (4,968)     (4,163)      (3,260)
  Borrowings under revolving credit agreement................................      --           8,162      --
  Repayments under revolving credit agreement................................      --         (13,000)     --
                                                                               ----------  ----------  -----------
Net cash (used) provided by financing activities.............................     (13,452)    (37,936)     147,806
                                                                               ----------  ----------  -----------
Increase (decrease) in cash..................................................       2,920      (2,423)      (2,543)
Cash--beginning of year......................................................         266       2,689        5,232
                                                                               ----------  ----------  -----------
Cash--end of year............................................................  $    3,186  $      266  $     2,689
                                                                               ----------  ----------  -----------
                                                                               ----------  ----------  -----------
</TABLE>
 
                                      S-4
<PAGE>
                                  SCHEDULE III
                         NAC RE CORP. AND SUBSIDIARIES
 
                      SUPPLEMENTARY INSURANCE INFORMATION
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                     FUTURE
                                     POLICY
                                    BENEFITS,                                          BENEFITS,
                                     LOSSES,                                            CLAIMS,    AMORTIZATION
                        DEFERRED     CLAIMS                                             LOSSES     OF DEFERRED
                         POLICY        AND                                   NET          AND         POLICY        OTHER
                       ACQUISITION   CLAIMS     UNEARNED      PREMIUM    INVESTMENT   SETTLEMENT   ACQUISITION    OPERATING
                          COSTS     EXPENSES    PREMIUMS      REVENUE      INCOME      EXPENSES       COSTS       EXPENSES
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
<S>                    <C>          <C>        <C>          <C>          <C>          <C>          <C>           <C>
DECEMBER 31, 1997
Domestic:
 Property/Casualty...   $  89,072   $1,513,416  $ 285,217    $ 525,017    $ 109,545    $ 346,005    $  140,862    $  77,932
  Accident and
    Health...........      --            (462)       (219)      (1,386)        (458)      (1,697)       --             (326)
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Subtotal.......      89,072   1,512,954     284,998      523,631      109,087      344,308       140,862       77,606
International:
 Property/Casualty...       3,637      98,692      17,461       51,016       13,963       35,187        10,290        9,289
Intercompany
  elimination........      --          (7,674)       (748)      --           --           --            --           --
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Total..........   $  92,709   $1,603,972  $ 301,711    $ 574,647    $ 123,050    $ 379,495    $  151,152    $  86,895
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
DECEMBER 31, 1996
Domestic:
 Property/Casualty...   $  82,369   $1,434,429  $ 255,514    $ 474,025    $  93,062    $ 303,485    $  133,423    $  71,231
  Accident and
    Health...........      --           2,764         775        1,987          144         (950)       --              110
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Subtotal.......      82,369   1,437,193     256,289      476,012       93,206      302,535       133,423       71,341
International:
 Property/Casualty...       2,842      80,531      15,609       50,330       11,124       36,418         9,901        7,587
Intercompany
  elimination........      --          (4,379)     --           --           --           --            --           --
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Total..........   $  85,211   $1,513,345  $ 271,898    $ 526,342    $ 104,330    $ 338,953    $  143,324    $  78,928
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
DECEMBER 31, 1995
Domestic:
 Property/Casualty...   $  68,158   $1,246,187  $ 216,213    $ 450,068    $  80,875    $ 293,262    $  132,049    $  55,919
  Accident and
    Health...........      --           3,584       2,005        2,926          708        1,776        --              489
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Subtotal.......      68,158   1,249,771     218,218      452,994       81,583      295,038       132,049       56,408
International:
 Property/Casualty...       2,308      43,277      12,520       38,791        7,725       31,110         7,014        6,044
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
Intercompany
  elimination........      --            (633)     --           --           --           --            --           --
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
      Total..........   $  70,466   $1,292,415  $ 230,738    $ 491,785    $  89,308    $ 326,148    $  139,063    $  62,452
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
                       -----------  ---------  -----------  -----------  -----------  -----------  ------------  -----------
 
<CAPTION>
 
                        PREMIUMS
                         WRITTEN
                       -----------
<S>                    <C>
DECEMBER 31, 1997
Domestic:
 
 Property/Casualty...   $ 543,633
  Accident and
    Health...........      (2,271)
                       -----------
      Subtotal.......     541,362
International:
 
 Property/Casualty...      52,294
Intercompany
  elimination........      --
                       -----------
      Total..........   $ 593,656
                       -----------
                       -----------
DECEMBER 31, 1996
Domestic:
 
 Property/Casualty...   $ 521,072
  Accident and
    Health...........         804
                       -----------
      Subtotal.......     521,876
International:
 
 Property/Casualty...      52,128
Intercompany
  elimination........      --
                       -----------
      Total..........   $ 574,004
                       -----------
                       -----------
DECEMBER 31, 1995
Domestic:
 
 Property/Casualty...   $ 471,917
  Accident and
    Health...........       4,131
                       -----------
      Subtotal.......     476,048
International:
 
 Property/Casualty...      45,441
                       -----------
Intercompany
  elimination........      --
                       -----------
                       -----------
      Total..........   $ 521,489
                       -----------
                       -----------
</TABLE>
 
                                      S-5
<PAGE>
                                                                     SCHEDULE IV
 
                         NAC RE CORP. AND SUBSIDIARIES
 
                                  REINSURANCE
 
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                                         PERCENTAGE
                                                                     CEDED       ASSUMED                  OF AMOUNT
                                                         GROSS      TO OTHER   FROM OTHER      NET         ASSUMED
                                                         AMOUNT    COMPANIES    COMPANIES     AMOUNT       TO NET
                                                       ----------  ----------  -----------  ----------  -------------
<S>                                                    <C>         <C>         <C>          <C>         <C>
DECEMBER 31, 1997
Premiums Written:
  Property/casualty..................................  $  120,509  $  130,645   $ 606,063   $  595,927          102%
  Accident and health................................         (26)       (433)     (2,678)      (2,271)         118
                                                       ----------  ----------  -----------  ----------          ---
      Total..........................................  $  120,483  $  130,212   $ 603,385   $  593,656          102%
                                                       ----------  ----------  -----------  ----------          ---
                                                       ----------  ----------  -----------  ----------          ---
DECEMBER 31, 1996
Premiums Written:
  Property/casualty..................................  $   72,749  $  139,928   $ 640,379   $  573,200          112%
  Accident and health................................          61         148         891          804          111
                                                       ----------  ----------  -----------  ----------          ---
      Total..........................................  $   72,810  $  140,076   $ 641,270   $  574,004          112%
                                                       ----------  ----------  -----------  ----------          ---
                                                       ----------  ----------  -----------  ----------          ---
DECEMBER 31, 1995
Premiums Written:
  Property/casualty..................................  $   70,138  $  155,777   $ 602,997   $  517,358          117%
  Accident and health................................          45         672       4,758        4,131          115
                                                       ----------  ----------  -----------  ----------          ---
      Total..........................................  $   70,183  $  156,449   $ 607,755   $  521,489          117%
                                                       ----------  ----------  -----------  ----------          ---
                                                       ----------  ----------  -----------  ----------          ---
</TABLE>
 
                                      S-6
<PAGE>
                                                                     SCHEDULE VI
 
                         NAC RE CORP. AND SUBSIDIARIES
 
                      SUPPLEMENTARY INFORMATION CONCERNING
                     PROPERTY/CASUALTY INSURANCE OPERATIONS
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                           DEFERRED     RESERVE FOR
                                            POLICY     UNPAID CLAIMS   DISCOUNT                               NET
                                          ACQUISITION   AND CLAIMS      IF ANY,     UNEARNED     EARNED    INVESTMENT
      AFFILIATION WITH REGISTRANT            COSTS       EXPENSES     DEDUCTED(1)   PREMIUMS    PREMIUMS     INCOME
- ----------------------------------------  -----------  -------------  -----------  ----------  ----------  ----------
<S>                                       <C>          <C>            <C>          <C>         <C>         <C>
CONSOLIDATED SUBSIDIARIES
December 31, 1997.......................   $  92,709    $ 1,603,972    $  26,290   $  301,711  $  574,647  $  120,953
December 31, 1996.......................   $  85,211    $ 1,513,345    $  20,766   $  271,898  $  526,342  $  101,515
December 31, 1995.......................   $  70,466    $ 1,292,415    $  18,340   $  230,738  $  491,785  $   86,115
 
<CAPTION>
                                          CLAIMS AND
                                            CLAIMS
                                           EXPENSES     AMORTIZATION
                                           INCURRED          OF
                                        RELATED TO (2)    DEFERRED
                                        --------------     POLICY     PAID CLAIMS
                                        CURRENT   PRIOR ACQUISITION   AND CLAIMS    PREMIUMS
      AFFILIATION WITH REGISTRANT       YEAR   YEARS       COSTS       EXPENSES     WRITTEN
- ------------------------------------------  ----------  ------------  -----------  ----------
<S>                                         <C>         <C>           <C>          <C>
CONSOLIDATED SUBSIDIARIES
December 31, 1997.......................$418,091 ($  38,596)  $  151,152  $  78,918 $  593,656
December 31, 1996.......................$372,294 ($  33,341)  $  143,324  $ 190,424 $  574,004
December 31, 1995.......................$345,783 ($  19,635)  $  139,063  $ 180,386 $  521,489
</TABLE>
 
- ------------------------
 
(1) Relates to certain workers' compensation case reserves which are discounted
    for statutory accounting purposes utilizing a 5% interest rate, and a 7%
    interest rate for GAAP.
 
(2) Amounts are net of discount related to certain workers' compensation case
    reserves.
 
                                      S-7

<PAGE>

                                                     EXHIBIT 10.21


                                   NAC RE CORP.

                1997 STOCK RETAINER PLAN FOR NONEMPLOYEE DIRECTORS

     1.   Purpose.  The NAC Re Corp. Stock Retainer Plan for Nonemployee
Directors (the "Plan") is intended (i) to further align the identity of
interests of the directors of NAC Re Corp. (the "Company") who are neither
officers nor employees of the Company or its subsidiaries ("Nonemployee
Directors") with the interests of the Company's shareholders, and (ii) to
attract and retain services of the most highly qualified individuals to
serve as Nonemployee Directors of the Company.

     2.   Participants.  All Nonemployee Directors are eligible to
participate in the Plan and each such director will participate as
described in Section 4 hereof

     3.   Common Stock Available under the Plan.  The aggregate number of
shares of common stock, $.10 par value per share of the Company ("Common
Stock"), that may be issued under this Plan shall be 50,000 shares of
Common Stock, which may be authorized and unissued shares or treasury
shares, subject to any adjustments made in accordance with Section 5
hereof.  If any shares of Common Stock issued pursuant to a Stock Retainer
(as defined below) shall, after issuance, be reacquired by the Company for
any reason, such shares may again be issued pursuant to the Plan.

     4.   Stock Retainer.

     (a)  Except as provided herein, from and after the Effective Date (as
defined in Section 9 hereof), on June 30, September 30, December 31 and
March 31 of each fiscal year (each, a "Payment Date"), each person serving
as a Nonemployee Director on such Payment Date will, for service as such,
be issued a number of shares of Common Stock ("Stock Retainer") equal to
one-quarter (1/4) of the quotient obtained by dividing (i) seventy-five
percent (75%) of the annual retainer (the "Retainer Amount") by (ii) the
average of the closing prices, as reported on the New York Stock Exchange
Composite Tape, of Common Stock for the twenty consecutive trading days
beginning and including June 1 of such fiscal year (but if June 1 shall not
be a trading day, then the first trading day following June 1).  To the
extent that such calculation does not result in a whole number of shares,
the fractional share shall be rounded upwards to the next whole number so
that no fractional shares shall be issued.

     (b)  In the event that a Stock Retainer is to be paid on a Payment
Date to a Nonemployee Director who shall have commenced service as a
Nonemployee Director subsequent to the immediately preceding Payment Date,
the Stock Retainer shall be adjusted to reflect the percentage of the
quarter during which such Nonemployee Director served as such.

     (c)  In the event a Nonemployee Director shall cease to serve as a
director of the Company between Payment Dates, such person shall receive a
Stock Retainer equal to the Stock Retainer that would otherwise have been
paid on the immediately following Payment Date had such person continued to
serve, adjusted to reflect the percentage of the quarter during which such
person served as a Nonemployee Director, and such Stock Retainer shall be
paid as soon as practicable following the date the Nonemployee Director
ceases to serve as a director of the Company.

     (d)  The stock certificate representing the Stock Retainer shall be
delivered to each Nonemployee Director as soon as practicable following each
Payment Date.  After the delivery of the shares, each Nonemployee Director
shall have the rights of a shareholder with respect to such shares 




<PAGE>



(including the right to vote such shares and the right to receive all
dividends paid with respect to such shares); provided, however, shares of
Common Stock received pursuant to a Stock Retainer in respect of a Payment
Date may not be sold, transferred, assigned, pledged, hypothecated or
otherwise disposed of until at least six months and one day after such
Payment Date.

     (e)  Notwithstanding the  foregoing,  no  Stock  Retainer  will  be 
issued  to  a  Nonemployee
Director who is removed for cause.

     5.   Adjustment Provisions.

     (a)  In the event that any reclassification, split-up or consolidation
of the Common Stock shall be effected, or the outstanding shares of Common
Stock are, in connection with a merger or consolidation of the Company or a
sale by the Company of all or a part of its assets, exchanged for a different
number or class of shares of stock or other securities or property of the
Company or for shares of the stock or other securities or property of any
other corporation or person, or a record date for determination of holders of
Common Stock entitled to receive a dividend payable in Common Stock shall
occur, (i) the number and class of shares that may be issued pursuant to
Stock Retainers thereafter paid, and (ii) the. number and class of shares
that have not been issued under effective Stock Retainers, shall in each case
be equitably adjusted as determined by the Board of Directors.

     (b)  In the event that any spin-off or other distribution of assets of
the Company to its shareholders shall occur, the number and class of shares
that may be issued pursuant to Stock Retainers thereafter paid shall be
equitably adjusted as determined by the Board of Directors.

     6.   General Provisions.

     (a)  Nothing in this Plan or in any instrument executed pursuant hereto
shall confer upon any person any right to continue to serve as a Director of
the Company.

     (b)  No shares of Common Stock shall be issued pursuant to a Stock
Retainer unless and until all legal requirements applicable to the issuance
of such shares have been complied with in the opinion of counsel to the
Company.  In connection with any such issuance, the person acquiring the
shares shall, if requested by the Company, give assurances, satisfactory to
counsel to the Company, in respect of such matters as the Company may deem
desirable to assure compliance with all applicable legal requirements.

     (c)  No person (individually or as a member of a group), and no
beneficiary or other person claiming under or through him, shall have any
right, title or interest in or to any shares of Common Stock allocated or
reserved for the purposes of this Plan or subject to any Stock Retainer
except as to such shares of Common Stock, if any, as shall have been issued
to him.

     (d)  Nothing in this Plan is intended to be a substitute for, or shall
preclude or limit the establishment or continuation of, any other plan,
practice or arrangement for the payment of compensation or benefits to
Nonemployee Directors that the Company now has or may hereafter put into
effect.







<PAGE>



     (e)  It shall be a condition to the obligation of the Company to issue
shares of Common Stock hereunder, that the participant pay to the Company,
upon its demand, such amount as may be requested by the Company for the
purpose of satisfying any liability to withhold federal, state, local or
foreign income or other taxes.  If the amount requested is not paid, the
Company shall have no obligation to issue, and the participant shall have no
right to receive, shares of Common Stock.

     7.   Duration, Amendments and Termination.

     (a)  No Stock Retainers shall be paid under this Plan with respect to
any period beginning after June 1, 2001.  The Board of Directors may amend or
suspend the Plan from time to time or terminate the Plan at any time.

     (b)  No amendment, suspension or termination of this Plan shall
adversely affect any participant to whom a Stock Retainer has been issued.

     8.   Governing Law.  This Plan and actions taken in connection herewith
shall be governed and construed in accordance with the laws of the State of
Delaware (regardless of the law that might otherwise govern under applicable
Delaware principles of conflict of laws).

     9.   Effective Date.

     (a)  This Plan shaft be effective as of June 11, 1997 (the "effective
Date"), when the Plan was approved by the Board of Directors.

     (b)  This Plan shall terminate on June 1, 2002 (unless sooner terminated
by the Board of Directors).



<PAGE>
                                                            EXHIBIT 12
                           NAC RE CORP. AND SUBSIDIARIES
                 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                               (Dollars in Thousands)



<TABLE>
<CAPTION>


                                                       Year Ended December 31,
                                  --------------------------------------------------------------
                                      1997        1996         1995         1994         1993
                                  ----------    ---------    ---------   ---------     ---------

<S>                                <C>           <C>          <C>          <C>          <C>
Earnings:

Operating income before 
income taxes                       $122,830      $89,036      $78,821      $42,290      $49,497
                                  ----------    ---------    ---------   ---------     ---------

Add back fixed charges:

Interest expense                     21,390       21,976       15,381       14,196       13,324

Amortization of related 
debt expenses                           345          346          267          258          258

Assumed interest component 
of rent expenses                      1,551        1,311        1,235        1,099        1,194
                                  ----------    ---------    ---------   ---------     ---------

  Total fixed charges                23,286       23,633       16,883       15,553       14,776
                                  ----------    ---------    ---------   ---------     ---------

Adjusted earnings                  $146,116     $112,669      $95,704      $57,843      $64,273
                                  ----------    ---------    ---------   ---------     ---------
                                  ----------    ---------    ---------   ---------     ---------


Ratio of earnings to fixed 
charges                            6.3 to 1      4.8 to 1     5.7 to 1    3.7 to 1     4.3 to 1
                                  ----------    ---------    ---------   ---------    ---------
                                  ----------    ---------    ---------   ---------    ---------
</TABLE>






                                                                              
 

<PAGE>

                                                                     Exhibit 13

                   Management's Discussion and Analysis of 
                Financial Condition and Results of Operations

GENERAL
 
    NAC Re Corp. ("NAC Re") is the holding company for NAC Reinsurance
Corporation ("NAC"), which is engaged in the reinsurance and insurance business.
NAC Re, NAC and its subsidiaries are collectively referred to as the Company.
(This discussion and analysis should be read in conjunction with the
consolidated financial statements and notes thereto of NAC Re included elsewhere
herein.)
 
INDUSTRY OVERVIEW
 
    The domestic and international property and casualty reinsurance industry
has been characterized by severe price competition over the last few years.
Generally, these competitive conditions have prevailed across both treaty and
facultative reinsurance products and within most business lines, including
casualty, property, and specialty lines. While reinsurance product terms,
underwriting expertise, and service quality offered by particular reinsurance
companies are important factors that may influence the reinsurance purchasing
decisions of primary companies, overall market conditions affecting supply and
demand for reinsurance products have led to substantial pressure on reinsurance
pricing. In particular, the substantial level of capital maintained by
reinsurance companies, resulting from, among other things, earnings growth,
investment portfolio gains, and the access to additional capital from capital
markets have contributed to growing capacity in the reinsurance industry.
Notwithstanding the decrease in the number of active reinsurance companies due
to acquisitions and the decision by certain companies to exit the industry,
there continues to be a substantial number of industry participants. In
addition, as a result of earnings growth, investment portfolio gains, mergers
and other factors (including a relatively low level of catastrophic events),
remaining industry competitors, despite increased share repurchase and dividend
activity, are in many cases characterized by greater capital levels.
 
    The demand for reinsurance by primary property and casualty insurance
companies is influenced by prevailing economic and market conditions,
anticipated underwriting and investment results, capital levels and risk
tolerance. While certain primary property and casualty insurance companies may
be inclined to purchase more reinsurance protection as a result of the
prevailing pricing environment, overall reinsurance demand has been adversely
affected by several factors. Consolidation among primary insurance companies,
increased primary company capital levels, and continued access to capital
markets have contributed to competitive pricing pressure by primary companies.
In a number of instances, primary insurance companies have chosen to increase
their net retention levels, thereby purchasing less reinsurance protection
(albeit with a greater level of risk). In addition, a number of primary
companies have commenced reducing the number of reinsurers with whom they
conduct business, thereby fostering increased competition for such
opportunities.
 
    Other factors that have contributed to the prevailing competitive conditions
in the reinsurance industry include new entrants to the reinsurance market
(including certain specialized reinsurance operations) and the presence of
certain reinsurance companies which operate within tax-advantaged jurisdictions
(e.g., Bermuda, Cayman Islands) that benefit from higher after-tax investment
returns. In addition, concerns with respect to the financial security of Lloyds
of London that had adversely impacted the competitive position of that
marketplace have apparently been overcome by actions taken at Lloyds over the
last few years, thereby enhancing its competitive position.
 
    To the extent that primary insurance companies increasingly emphasize
underwriting expertise, financial security and service levels in their selection
of reinsurers, management believes that the Company is well positioned to
compete as compared to those competitors which do not have the personnel,
systems, controls, capital position and service capabilities enjoyed by the
Company.
 
                                       20

<PAGE>

    The primary insurance industry in which the Company conducts its program 
business is also characterized by substantial competitive pricing. Many 
primary property and casualty insurance companies have created operations or 
marketing initiatives to develop program business to utilize the underwriting 
operational capabilities already in existence. The program business, 
including large groups of insureds with substantially consistent 
underwriting, administration, and claims handling requirements, presents such 
primary insurance companies with the opportunity to leverage their 
underwriting, marketing, and claims handling capabilities. The Company writes 
primary program business through its wholly-owned subsidiaries, Greenwich 
Insurance Company (licensed in 50 states) and Indian Harbor Insurance Company 
(excess and surplus lines). Such business is written through both managing 
and general agents and includes certain specialty classes such as auto 
warranty business.
 
RESULTS OF OPERATIONS
 
    The Company's net operating income, excluding realized investment gains, was
$67.7 million for 1997, $57.8 million for 1996, and $45.9 million for 1995. On a
basic per share basis, operating income, excluding realized investment gains,
was $3.68, $3.07, and $2.59 for 1997, 1996, and 1995, respectively. On a diluted
per share basis, operating income, excluding realized investment gains, was
$3.42, $2.90, and $2.45 for 1997, 1996, and 1995, respectively.
 
    Net income was $95.7 million for 1997, $70.5 million for 1996, and $62.8
million for 1995. On a basic per share basis, net income was $5.21, $3.74, and
$3.55 for 1997, 1996, and 1995, respectively. On a diluted per share basis, net
income was $4.77, $3.51 and $3.30 for 1997, 1996, and 1995, respectively. Net
income for 1997 includes after-tax realized investment gains of $28.0 million or
$1.35 per diluted share compared to $12.7 million or $.61 per diluted share in
1996 and $17.0 million or $.84 per diluted share in 1995.
 
PREMIUM REVENUES
 
    The Company's premium revenue for its domestic and international operations
is as follows:
 
<TABLE>
<CAPTION>
                                                                      GROSS PREMIUMS WRITTEN             PERCENT CHANGE
                                                                  -------------------------------  --------------------------
<S>                                                               <C>        <C>        <C>        <C>          <C>
(DOLLARS IN MILLIONS)                                               1997       1996       1995      97 VS. 96     96 VS. 95
- ----------------------------------------------------------------  ---------  ---------  ---------  -----------  -------------
Domestic:
Casualty........................................................  $   340.1  $   364.1  $   354.8        (6.6)%         2.6%
Property........................................................      178.5      189.2      179.8        (5.7)          5.2
Specialty/other.................................................      148.6      102.1       92.3        45.5          10.7
                                                                  ---------  ---------  ---------  -----------  -------------
  Subtotal......................................................      667.2      655.4      626.9         1.8           4.6
                                                                  ---------  ---------  ---------  -----------  -------------
International:
Casualty........................................................       30.3       22.8       19.2        32.9          18.1
Property........................................................       32.2       38.9       33.9       (17.0)         14.7
                                                                  ---------  ---------  ---------  -----------  -------------
  Subtotal......................................................       62.5       61.7       53.1         1.4          15.9
                                                                  ---------  ---------  ---------  -----------  -------------
Intercompany transactions.......................................       (5.8)      (3.0)      (2.1)         --            --
                                                                  ---------  ---------  ---------  -----------  -------------
Total...........................................................  $   723.9  $   714.1  $   677.9         1.4%          5.3%
                                                                  ---------  ---------  ---------  -----------  -------------
</TABLE>

                                       21

<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS
 
<TABLE>
<CAPTION>
                                                                       NET PREMIUMS WRITTEN             PERCENT CHANGE
                                                                  -------------------------------  ------------------------
<S>                                                               <C>        <C>        <C>        <C>          <C>
(DOLLARS IN MILLIONS)                                               1997       1996       1995      97 VS. 96    96 VS. 95
- ----------------------------------------------------------------  ---------  ---------  ---------  -----------  -----------
Domestic:
Casualty........................................................  $   313.3  $   328.9  $   311.7        (4.8)%        5.5%
Property........................................................      122.6      121.1      111.1         1.3          9.0
Specialty/Other.................................................      105.5       71.9       53.3        46.7         35.0
                                                                  ---------  ---------  ---------  -----------  -------------
  Subtotal......................................................      541.4      521.9      476.1         3.7          9.6
                                                                  ---------  ---------  ---------  -----------  -------------
International:
Casualty........................................................       27.5       22.1       18.7        24.0         18.4
Property........................................................       24.8       30.0       26.7       (17.2)        12.1
                                                                  ---------  ---------  ---------  -----------  -------------
  Subtotal......................................................       52.3       52.1    45.4 .3        14.7
                                                                  ---------  ---------  ---------  -----------  -------------
Total...........................................................  $   593.7  $   574.0  $   521.5         3.4%        10.1%
                                                                  ---------  ---------  ---------  -----------  -------------
</TABLE>
 
    Worldwide gross premiums written were $723.9 million in 1997 compared to
$714.1 million in 1996 and $677.9 million in 1995. The 1.4% increase in 1997 was
primarily attributable to the increase in domestic gross premiums written,
specifically the specialty/other segment. The 5.3% increase in 1996 was
attributed to increases in all business lines: casualty, property, specialty,
and international. Worldwide net premiums written were $593.7 million in 1997
compared to $574.0 million in 1996 and $521.5 million in 1995. The increases in
1997 and 1996 were principally due to the reductions in ceded premium as
discussed below.
 
    Worldwide casualty gross premiums written in 1997 totaled $368.0 million, a
decrease of 4.7% compared to increases of 3.4% in 1996 and 21.5% in 1995.
Domestic casualty gross premiums written decreased 6.6% in 1997 compared to
increases of 2.6% in 1996 and 20.9% in 1995. Casualty business declined in 1997
due principally to NACs continued strong underwriting discipline amid prolonged
soft market conditions defined by a further decline in market rates. The decline
in the 1997 casualty treaty gross premiums offset the 28% increase in casualty
facultative premiums, principally attributable to the increase in facultative
automatic business. The rate of growth in 1996 casualty gross premiums was
diminished as a result of increased retentions by certain ceding companies,
particularly from one large account. Casualty growth in 1996 was attributed to
increased opportunities from existing facultative and treaty clients, which more
than offset the overall impact of increased retention levels of the Company's
clients. Casualty growth in 1995 was generated by increased participations with
existing treaty clients.
 
    Worldwide property gross premiums written were $207.3 million in 1997,
compared to $225.8 million in 1996 and $212.2 million in 1995. Domestic property
gross premiums written decreased 5.7% in 1997 compared to increases of 5.2% in
1996 and 18.5% in 1995. The 1997 decrease resulted from increased competitive
market conditions. Property facultative growth of 4.8% in 1997 was more than
offset by the decline in property treaty that contributed to the overall
decrease in property gross premiums written. The increase in property gross
premiums written in 1996 and 1995 was the result of growth in facultative
business.
 
    Worldwide specialty and other gross premiums written in 1997 totaled $148.6
million which included fidelity/surety, ocean marine, aviation business, and
certain primary program business. Fidelity/surety bond gross premiums were $37.8
million in 1997, $45.9 million in 1996, and $33.3 million in 1995. The lower
premium amount in 1997 was primarily due to the Company's strong underwriting 
and pricing 

                                       22

<PAGE>

standards in a heightened competitive environment. The growth in 1996 
fidelity/surety bond premiums was primarily attributable to one significant 
new account. The 1997, 1996, and 1995 fidelity/surety bond premiums were 
affected by the weak market conditions and increased retentions by primary 
companies. Specialty lines include a significant portion of the Company's 
primary program business. The balance of the program business is included in 
casualty and property business. The majority of the growth reported by the 
Company's primary companies in 1997 emanated from increased opportunities with 
an auto warranty program. Primary insurance business represented 
approximately 18% of total gross premiums written for the Company in 1997.
 
    Specialty lines were expanded to include ocean marine business in 1994.
Ocean marine gross premiums written totaled $18.8 million in 1997 compared to
$12.7 million in 1996. The 1997 increase reflects the benefits derived from
several new contracts. The Company's participation in aviation began in 1992 and
expanded in 1994 with participation in an industry aviation underwriting pool.
Net premiums written from aviation business totaled $14.9 million, $8.3 million,
and $10.9 million in 1997, 1996, and 1995, respectively. The increase in 1997
was principally due to the Company's participation in the aviation pool combined
with additional premiums in connection with providing reinsurance to the
aviation pool.
 
    International gross premiums written were $62.5 million, $61.7 million, and
$53.1 million for the years 1997, 1996, and 1995, respectively. The 1.4%
increase in 1997 was largely due to an increase in casualty business offset by a
decline in property business. The 15.9% increase in 1996 was due to the growth
of casualty and property treaty business.

    In 1998 the Company announced an agreement in principle to acquire the
managing agency assets of Morgan, Fentiman & Barber, a Lloyds managing agency,
which manages Denham Syndicate 990. In conjunction with this proposed
acquisition, the Company established a corporate capital vehicle, Stonebridge
Underwriting, Ltd., to participate on the Denham Syndicate commencing in 1998.
The acquisition is subject to the completion of due diligence and regulatory
approval. (See "Subsequent Event" for further explanation.)
 
    Worldwide ceded premiums recorded for retrocession agreements were $130.2
million, $140.1 million, and $156.4 million in 1997, 1996, and 1995,
respectively. The Company continually evaluates its retrocessional programs
based on market conditions, pricing, and its own risk tolerance. The 1997 and
1996 decreases in ceded premium were primarily due to improved pricing for the
Company's catastrophe and per risk retrocessional programs, partially offset in
1997 by growth in certain primary programs with specific reinsurance protection.
 
    The Company's underwriting philosophy of long-term partnerships with quality
core clients as well as further expansion of its client base continues to
underscore the Company's success. Insurers, rated A- or better by A.M. Best,
comprised the top 30 clients of the Company in 1997. However, no single client
generated more than 6% of premium volume in 1997, and the top 10 clients
represented 37% of premiums compared to 56% three years prior. Given this client
depth, the Company does not believe that any future reduction of business
assumed from any one client will have a materially adverse effect on its future
financial condition or results of operations due to the Company's competitive
position in the marketplace and the continuing availability of other sources of
business.

                                       23
 
<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS
 
OPERATING COSTS AND EXPENSES
 
CLAIMS AND CLAIMS ADJUSTMENT
 
    Generally, claims and claims expenses represent the Company's most
significant and uncertain costs. Claims and claims expense reserves are
estimates involving actuarial and statistical projections, at a given point in
time, of what the Company expects the ultimate settlement and administration of
claims to cost based on facts and circumstances then known. The reserves are
based on estimates of claims and claims expenses incurred and, therefore, the
amount ultimately paid may be more or less than such estimates. These expenses
are principally based on NACs analysis of reports and individual case estimates
received from ceding companies. A provision, on the basis of past experience,
claims audits, and other factors, is included for losses and loss adjustment
expenses incurred but not reported ("IBNR"). The Company expects to refine such
estimates in subsequent accounting periods based upon facts and circumstances
then known.
 
    The fact that the Company's exposure to claims generally begins excess of 
its clients exposure contributes to the uncertainty of its claims estimates. 
With this excess coverage, claims occur less frequently than coverages which 
attach within the primary insurance coverages, thereby providing less 
credible historical claims experience from which to estimate ultimate claims 
costs. Further, the Company writes coverage in certain volatile casualty 
lines of business, such as general liability, directors and officers 
liability and medical malpractice. Claims activity for these lines is 
characterized by lengthy litigation, the ultimate cost of which can be 
influenced significantly by future court rulings.
 
    Estimates of claims and claims expenses are based in part on a prediction 
of future events, estimates of future trends in claims severity and frequency 
and other variable factors. The Company's ability to predict future trends 
based solely upon its own historical claims experience is inherently 
difficult because of its substantial growth in premiums since 1985. 
Therefore, for purposes of evaluating future trends and providing an estimate 
of ultimate claims costs, the Company has supplemented its historical claims 
experience to a certain extent with claims experience derived from external 
sources, such as reinsurance industry data. As the Company's book of business 
continues to mature, its own historical claims experience achieves greater 
credibility and enhances its ability to evaluate future trends. Accordingly, 
the Company believes its reserving process improves as additional claims 
experience emerges.
 
    Claims and claims expenses incurred were $379.5 million in 1997 compared to
$339.0 million in 1996 and $326.1 million in 1995. The increase in 1997 was
principally attributable to growth in earned premium and a higher loss ratio.
The increase in 1996 was primarily due to growth in earned premium partially
offset by a lower loss ratio. Net claims and claims expenses expressed as a
percentage of net earned premiums (the claims and claims expense ratio)
increased to 65.9% in 1997 from 63.7% in 1996 on a domestic statutory basis. The
change in the 1997 ratio was primarily due to competitive market conditions. The
improvement in the 1996 ratio of 63.7% from the 1995 ratio of 65.1% was due to a
somewhat more favorable prior years claims and claims expense development in
1996.
 
    The Company's total net claims and claims expenses for each year reflect
favorable claims development from prior years of $38.6 million in 1997, $33.3
million in 1996, and $19.6 million in 1995.
 
    Claims payments were $78.9 million in 1997 compared to $190.4 million in
1996 and $180.4 million in 1995. The decrease in 1997 was due to the net impact
of the retrocessional termination discussed below, partially offset by several
commutations of assumed business during 1997.

                                       24

<PAGE>
 
    The Company's net favorable claims development for business written since
1986 continued to emerge during 1997, 1996, and 1995. This favorable development
is driven by several factors, some of which are interdependent. A principal
factor is the strength of the actuarial assumptions underlying the business
written, particularly with respect to social and economic inflation. These
actuarial assumptions are utilized to establish the initial expected target loss
ratio employed in the actuarial methodologies from which the reserves for claims
and claims expenses are derived. Such loss ratios are periodically adjusted to
reflect comparisons of actuarially-computed expected claims to actual claims and
claims expense development, inflation and other considerations. This favorable
development has offset certain unfavorable development on business written prior
to 1986, principally related to asbestos and environmental claims.
 
    An important area of focus in the reinsurance and insurance industries is
exposure to asbestos and environmental claims. The Company's reserving process
includes a supplemental evaluation of the potential impact on claims liabilities
from exposure to asbestos and environmental claims, including related loss
adjustment expenses. The Company recorded claims and claims expenses incurred
relating to asbestos and environmental claims of $8.1 million in 1997, $10.7
million in 1996, and $7.0 million in 1995, inclusive of paid claims of $3.8
million, $4.2 million, and $4.8 million, respectively. The Company's claims and
claims expense reserves for such exposures, net of reinsurance, as of December
31, 1997, 1996, and 1995 were $32.8 million, $28.5 million, and $22.0 million,
respectively. A reconciliation of the Company's gross and net liabilities for
such exposures for the three years ending December 31, 1997 is set forth in Note
4 of the Notes to Consolidated Financial Statements.
 
    The Company believes it has made a reasonable provision for its asbestos and
environmental exposures and is unaware of any specific issues which would
materially affect its claims and claims expense estimate. The estimation of
claims and claims expense liabilities for asbestos and environmental exposures
is subject to a much greater uncertainty than is normally associated with the
establishment of liabilities for certain other exposures due to several factors,
including: i) uncertain legal interpretation and application of insurance and
reinsurance coverage and liability; ii) the lack of reliability of available
historical claims data as an indicator of future claims development; iii) an
uncertain political climate which may impact, among other areas, the nature and
amount of costs for remediating waste sites; and iv) the potential of insurers
and policyholders to reach agreements in order to avoid further significant
legal costs. Due to the potential significance of these uncertainties, the
Company believes that no meaningful range of claims and claims expense
liabilities beyond recorded reserves can be established. The Company believes
that these issues are not likely to be resolved in the near future. However, as
they are resolved, additional reserve provisions, which could be material in
amount, may be necessary.
 
    The Company is aware of certain evolving potential exposures, generally
referred to as other mass tort liabilities, and to the extent appropriate, the
Company has considered these exposures in its claims and claims expense
reserves.
 
    The Company is unaware of any specific, unusual and significant
circumstances affecting claims reserve estimates, except to the extent
disclosed.

                                       25

<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS
 
REINSURANCE/CATASTROPHE MANAGEMENT
 
    The Company purchases reinsurance to increase premium capacity and to reduce
the risk of loss on reinsurance underwritten. Historically, the Company has
obtained reinsurance for itself primarily through excess of loss reinsurance
agreements. The Company has also obtained reinsurance protection against
liability on a single event arising from different treaty obligations or from
related losses involving more than one reinsured or contract. The Company
evaluates the financial condition of its retrocessionnaires periodically. Based
on this analysis, a reserve for potential and actual non-recovery from
retrocessionnaires unable to meet their obligation under the retrocession
agreement is included in claims and claims expenses. Charges to earnings for
potential and actual non-recovery amounted to $3.7 million, $1.2 million, and
$1.4 million for 1997, 1996, and 1995, respectively, and reflect a provision for
paid and unpaid claims, inclusive of IBNR claims. This 1997 charge and
substantially all such charges relate to reinsurance purchased prior to 1986.
 
    During 1997, the Company maintained catastrophe reinsurance protection of
$115 million in excess of the Company's initial retention of $5 million on a
first and second event. For 1998, the Company has obtained catastrophe
reinsurance protection of $97 million in excess of a $5 million initial net
retention, subject to a graduated increase of $3 million in net retention in the
event gross losses exceed $60 million. The Company evaluates its potential
catastrophe exposure, including both gross loss estimates and the impact of
available reinsurance protection. While the Company believes its management of
catastrophe exposures and underwriting guidelines are adequate, an extremely
large catastrophic event or multiple catastrophic events could have a material
adverse effect on the financial condition and results of operation of the
Company.
 
    In recognition of the Company's surplus position, financial capacity and
continued positive results from business written since 1986, the Company
terminated two retrocessional programs effective January 1, 1997. As a result,
the Company received total consideration of approximately $225 million,
representing reinsurance recoverable balances for unpaid claims and claims
expenses, with total cash and invested assets increasing by approximately $180
million. The termination of these programs resulted in an increase in the
Company's retention levels for the years 1996 and prior. As the casualty book of
business matures, the increase in net retentions for those years may result in
increased volatility in future years to the extent the actual frequency and
severity of claims differs from the Company's current estimates. The Company
believes its exposure to such volatility is within acceptable levels. See Note 6
of the Notes to Consolidated Financial Statements for the impact of this action
on 1997 and 1996 retention levels.
 
UNDERWRITING RESULTS
 
    One traditional means of measuring the underwriting performance of a
property/casualty insurer is the statutory composite ratio. This ratio, which is
based upon statutory accounting practices (which differ from generally accepted
accounting principles), reflects underwriting experience, but does not reflect
income from investments. A composite ratio of under 100% generally indicates
underwriting profitability while a composite ratio exceeding 100% generally
indicates an underwriting loss.
 
                                       26

<PAGE>

    The following chart sets forth statutory composite ratios for the Company's
domestic reinsurance subsidiary:
 
<TABLE>
<CAPTION>
                                                                                             1997       1996       1995
                                                                                           ---------  ---------  ---------
<S>                                                                                        <C>        <C>        <C>
Domestic Composite Ratio:
Claims and claims expenses...............................................................       65.9%      63.7%      65.1%
Commissions and brokerage................................................................       27.3       28.3       29.7
Other operating expenses.................................................................        9.9        9.1        8.3
                                                                                           ---------  ---------  ---------
Total....................................................................................      103.1%     101.1%     103.1%
                                                                                           ---------  ---------  ---------
</TABLE>
 
    The increase in the Company's domestic composite ratio for 1997 primarily
reflected the increase in the claims and claims expenses and other operating
expenses. The 1996 ratio indicated an improvement in underwriting results
compared to 1995. The claims and claims expense ratio increased in 1997 due to
the impact of competitive market conditions on pricing adequacy. Operating
expenses increased in 1997, 1996, and 1995 reflecting continued business
expansion, investment in technology and a continued investment in facultative
business. The Company continues to seek measures to contain operating expenses
that are not central to its underwriting activities and to better utilize its
resources.
 
    The 1997 statutory composite ratio for the Company's international
reinsurance subsidiary was 108.9% compared to 105.6% in 1996 and 111.7% in 1995.
A principal cause of these relatively high composite ratios was the contribution
of the operating expense ratios of 18.7%, 13.7%, and 13.0% for the years ended
December 31, 1997, 1996, and 1995, respectively. The Australian branch of the
international reinsurance subsidiary, although established in 1996, did not
commence writing premium until 1997 contributing to the increase in the
operating expense ratio in 1997 from 1996. The Company generally expects a
higher expense ratio in the start-up years of an operation. The expense ratio of
the international subsidiary is expected to decline over time to the extent that
it leverages its investment in infrastructure and marketing, broadens client
relationships, and generates increases in premium revenues.
 
    The pricing of the Company's reinsurance contracts incorporates many 
factors, including exposure to claims and the expenses of the client and the 
broker. Commissions and brokerage expenses, as a percentage of premium 
revenues, declined moderately in 1997 compared to 1996 and 1995. This 
decrease was principally due to the relative increase in 1997 of primary 
program business, where commission costs were significantly lower, partially 
offset by increases in pro rata contracts written in the Company's specialty 
lines of business, contracts which generally carry a higher commission rate. 
The Company's actuaries and underwriters evaluate the adequacy of premium 
revenue net of these expenses, thereby mitigating the effect of variations in 
these expenses to overall underwriting results.
 
INVESTMENTS
 
    Cash and invested assets were $2.3 billion at December 31, 1997 compared to
$2.0 billion at December 31, 1996, excluding net investment payables of $25.8
million and $24.9 million for 1997 and 1996, respectively.
 
    Net investment income increased 17.9% in 1997 compared to 16.8% in 1996 and
10.9% in 1995. The 1997 increase was principally attributable to the benefit
derived from investment of the proceeds of approximately $180 million resulting
from two retrocessional program terminations in early 1997. (See 

                                       27

<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS

Note 6 to the Notes to Consolidated Financial Statements.) Further, the 1997 
investment portfolio was repositioned during the year to maximize after-tax 
earnings. This portfolio shift consisted of increasing the Company's 
investment in tax-exempt securities to take advantage of the higher after-tax 
yields of these securities as well as extending the Company's fixed maturity 
duration to approximately 5.6 years to capture the yield benefit of a higher 
interest rate environment in early 1997. As such, the Company's after-tax 
investment yield was 4.7% in 1997 compared to 4.4% in 1996 and 4.6% in 1995. 
The Company anticipates continued growth in investment income during 1998 due 
to a higher invested asset base. However, this growth will be tempered by the 
decreasing yields available in the current interest rate environment.
 
    Realized investment gains, net of tax, were $1.35 per diluted share for
1997, $.61 per diluted share for 1996, and $.84 per diluted share for 1995.
Gains and losses on the sale of investments are recognized as a component of
operating income, but the timing and recognition of such gains and losses are
unpredictable and are not indicative of future operating results.
 
    The Company's investment strategy is focused principally on income 
predictability and asset value stability. The Company's emphasis on high 
quality, fixed maturity investments reflects this strategy. Tactical shifts 
between taxable and tax-exempt bonds may occur in order to maximize after-tax 
investment returns without compromising balance sheet integrity. At the end 
of 1997, the Company's fixed maturity investments amounted to $2.1 billion, 
which approximates 89% of cash and invested assets. Approximately 94% of such 
investments are rated investment grade with an average rating of Aa2/AA by 
Moodys Investor Services, Inc. or Standard & Poors.
 
    The balance of the Company's investment portfolio at December 31, 1997,
consisting of cash, short-term investments and equity securities, amounted to
$259.4 million. As of December 31, 1997, the Company held $142.5 million or 6.1%
of cash and invested assets in equity securities, representing 20.3% of
statutory surplus. This was compared to $179.6 million or 9.1% of invested
assets in equity securities at December 31, 1996, representing 27% of statutory
surplus.
 
    Changes in market interest rates in late 1997 resulted in an increase in the
market value of the Company's investment securities compared to 1996. Net
unrealized appreciation of investments, net of tax, was $55.0 million or $3.00
per share at December 31, 1997 compared to $31.7 million or $1.72 per share at
December 31, 1996. The unrealized appreciation was primarily attributable to the
market value fluctuations in the Company's fixed income securities, which are
recorded at their fair market values.
 
    Uncertainties exist regarding interest rates and inflation and their
potential impact on the market values of the Company's fixed income securities.
The Company actively considers the risks and financial rewards associated with
the maturity distribution of its fixed income portfolio. In this regard, the
Company takes into consideration the pattern of expected claims payments and the
Company's future cash flow projections in evaluating its investment
opportunities.
 
    Since the initial capitalization of the Company's international reinsurance
operation in London, England (NAC Re International) with $75 million in 1993 and
subsequent contributions in 1994 and 1995, the stockholders equity of NAC Re
International has grown to $148.5 million as of December 31, 1997. This capital,
a component of the invested assets described above, is being invested in
accordance with the 

                                       28

<PAGE>

Company's overall investment strategy. At December 31, 1997, NAC Re 
Internationals investment portfolio, which was primarily invested in U.K. 
Government securities, had an average duration of 4.4 years and an after-tax 
investment yield of 4.4%.
 
INCOME TAXES
 
    The Company's effective tax rate increased to 22.1% in 1997 compared to 
20.8% in 1996 and 20.3% in 1995. Excluding investment gains, the Company's 
1997 effective tax rate was 15.6% compared to 16.8% in 1996. This decrease 
reflects the shift to tax-exempt fixed maturities in 1997. The Company's 
effective tax rate increased in 1996 over 1995 principally due to improved 
underwriting results and a slightly higher effective tax rate on investment 
income. Note that the Company's future tax position is subject to changes in 
the tax laws.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    As a holding company, NAC Res assets consist primarily of its common 
stock investment in NAC. Cash flow within NAC Re consists of investment 
income, operating and interest expenses, dividends to stockholders, and 
dividends and tax reimbursements from NAC. These dividends are subject to 
statutory restrictions as described in Note 11 of the Notes to Consolidated 
Financial Statements.
 
    The Company's debt-to-capital ratio improved to 32.3% in 1997 from 36.1% in
1996. In late 1995, the Company issued $100 million of 7.15% Notes due November
15, 2005 and raised approximately $49 million on the issuance of 1,530,000
shares of Common Stock. Previously, the Company had raised $200 million in 1992
through the issuance of $100 million of 5.25% Convertible Subordinated
Debentures due December 2002 and $100 million of 8% Notes due June 1999. As a
result of the transactions and borrowings described below, pretax interest
expense including amortization expense was $21.7 million in 1997, $22.3 million
in 1996, and $15.6 million in 1995.
 
    NAC Re maintains a revolving credit facility, under which it can borrow up
to $35 million. Outstanding borrowings as of December 31, 1997 and 1996 were
$12.9 million and were principally used to finance the Company's repurchase of
its Common Stock. The facility is scheduled to be reduced on a quarterly basis
beginning in July 1998. NAC has a $15 million line of credit which is available
for catastrophe claims payments or working capital purposes. There were no
outstanding borrowings on this facility at December 31, 1997. Interest costs on
borrowing facilities were approximately $1.0 million, $1.6 million, and $1.4
million in 1997, 1996, and 1995, respectively.
 
    During 1997, the Company repurchased approximately 345,400 shares of NAC Re
Common Stock under the stock repurchase program for an aggregate purchase price
of approximately $14.5 million. As of December 31, 1997, approximately 656,000
shares remain authorized for repurchase.
 
    The Company's quarterly dividend on its common stock was increased in June
1997 to $.075 per share from $.06 per share. It is anticipated that the cash
dividend level will leave sufficient retained earnings to meet the Company's
future financial needs.

                                       29

<PAGE>

Management's Discussion and Analysis
 
    Consolidated stockholders equity totaled $657.1 million or $35.89 per share
at December 31, 1997 compared to $553.3 million or $30.06 per share at December
31, 1996.
 
    Statutory surplus of the reinsurance subsidiary was approximately $702
million and $664 million at the end of 1997 and 1996, respectively. Indicative
of its strengthened capital position is NACs growth in surplus and its rank as
one of the 10 largest domestic reinsurers as measured on this basis. The Company
believes its surplus level enhances its ability to attract new business and
retain its existing client base.
 
    The Company's insurance operations create liquidity in that premiums are
received substantially in advance of the time claims are paid. Over the most
recent three years, cash flow provided by operating activities totaled over $654
million, including 1997 cash flow of $314 million. The cash flow for 1997
increased from 1996 principally due to the proceeds received from the
terminations of certain retrocessional agreements described above.
 
    Accounting Pronouncements 

    In June 1997, the Financial Accounting Standards Board issued Statement 
of Financial Accounting Standards No. 130, "Reporting Comprehensive Income," 
which is effective for years beginning after December 15, 1997. The Company 
will apply the provisions of this Statement beginning in the first quarter of 
1998.
 
    Also in June 1997, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 131, "Disclosures About Segments of an
Enterprise and Related Information," which is effective for years beginning
after December 15, 1997. The Company plans to adopt the Statement in the 1998
annual financial statements.
 
    For explanation of the requirements of each of these pronouncements, See
Note 2 of the Notes to the Consolidated Financial Statements.
 
    Subsequent Event On January 22, 1998, the Company announced an agreement 
in principle to acquire the managing agency assets of Morgan, Fentiman & 
Barber (MFB), a Lloyds managing agency. MFB currently manages Denham 
Syndicate 990 which underwrites a specialized book of business, concentrating 
on long-tail casualty lines and non-marine physical damage, including both 
direct and reinsurance business. In late 1997, the Company formed a 
subsidiary, Stonebridge Underwriting Ltd., which is participating as a 
corporate capital vehicle on the Denham Syndicate commencing with the 1998 
underwriting year. These transactions are intended to provide the Company 
access to Lloyds worldwide insurance capabilities.
 
    The acquisition is subject to the completion of due diligence and regulatory
approval and is expected to close during the second quarter of 1998, however,
there are no assurances that the acquisition discussed above will be
consummated. The transaction is not expected to have a material impact on the
financial condition or results of operations of the Company in 1998.
 
    IMPACT OF THE YEAR 2000 ISSUE 

    The Company began assessing the impact of the Year 2000 issue on its 
computer hardware and software systems in 1995. Certain systems have been 
identified for replacement before year-end 1999 due to normal business 
requirements. The replacement systems will be reviewed or designed to ensure 
they are 

                                       30

<PAGE>

Year 2000 compliant prior to implementation. Systems not identified 
for replacement are expected to be assessed and made Year 2000 compliant 
prior to year-end 1999 at a cost that is not expected to be material to the 
Company. Currently, management is conducting a review of all such systems. As 
of December 31, 1997, management had not identified any hardware or software 
computer system with a significant Year 2000 compliance problem that would be 
expected to have a materially adverse effect on its financial condition or 
results of operations.
 
    The Company has initiated a Year 2000 assessment of the Company's business
operations and products that could potentially be affected by the Year 2000
problem. The purpose of this review is to determine what impact, if any, the
Year 2000 issue may have on the Company and its significant customers,
suppliers, and other constituents, and whether that impact will be material to
the Company's financial condition or results of operations. The Company expects
to contact certain customers, retrocessionnaires, reinsurance intermediaries,
managing general agents, suppliers, and other constituents to determine the
nature and extent of their Year 2000 compliance efforts and to assess whether
their noncompliance would have a material adverse affect on the Company's
financial condition or results of operations. Based on this assessment,
management will establish a strategy responsive to any issues identified.
 
    The ability of the Company's customers, suppliers, and other constituents 
to achieve Year 2000 compliance, notwithstanding the Company's due diligence 
inquiries, presents inherent and unpredictable risks and uncertainties. The 
extent to which the Company's financial condition or results of operations 
may be materially affected by the Year 2000 problems of third parties depends 
on a variety of factors including, but not limited to, whether these third 
parties can achieve their own timely Year 2000 compliance objectives; whether 
their compliant systems remain compatible with the Company's systems; and the 
nature and extent to which the Company's systems may be affected by the third 
partys noncompliant systems. Unpredictable long-term failures of certain 
essential services including, but not limited to, the banking, securities, 
utility, telecommunications, and transportation industries, due to their own 
Year 2000 problems are generally beyond the Company's control and could have 
an adverse material impact on the Company's financial condition or results of 
operations.
 
    There is presently uncertainty as to whether Year 2000-related claims will
have a material affect on the industrys financial condition or results of
operations. Due to these uncertainties, the Company believes that no meaningful
range of claims and claims expense liabilities beyond recorded reserves can be
established. As these uncertainties are resolved, additional reserve provisions,
which could be material in amount, may be necessary.
 
    All predictions regarding the impact of the Year 2000 issue on the Company
and third parties and the attendant costs are inherently subject to risks and
uncertainties. The Company cautions that the factors and assumptions described
above, as well as unknown factors, may cause the Company's actual Year 2000
compliance costs, and the resultant impact on its business, operations, or
financial condition to differ materially from those discussed above.
 
REGULATORY INITIATIVES
 
    NAC Re and its domestic subsidiaries are subject to regulatory oversight
under the insurance statutes and regulations of the jurisdictions in which they
conduct business, including all states of the United States and Canada. NAC Res
international subsidiary is subject to the regulatory authority of the United
Kingdom 

                                       31

<PAGE>

Management's Discussion and Analysis

Department of Trade and Industry. The international subsidiarys
Australian branch office is also subject to the Australian Insurance and
Supervisory Commissions solvency and regulatory authority. These regulations
vary from jurisdiction to jurisdiction and are generally designed to protect
ceding insurance companies and policyholders by regulating the Company's
financial integrity and solvency in its business transactions and operations.
Many of the insurance statutes and regulations applicable to the Company relate
to reporting and disclosure standards which allow insurance regulators to
closely monitor the Company's performance. Typical required reports include
information concerning the Company's capital structure, ownership, financial
condition, and general business operations.

    In 1993, the National Association of Insurance Commissioners (the 
"NAIC"), by adopting a model risk-based capital act, intended to provide an 
additional tool for regulators to evaluate the capital of property and 
casualty insurers and reinsurers with respect to the risks assumed by them 
and determine whether there is a perceived need for corrective action. The 
nature of the corrective action depends upon the extent of the calculated 
risk-based capital deficiency and ranges from requiring the Company to submit 
a comprehensive plan to placing the insurer under regulatory control. While 
the model risk-based capital act has not yet been adopted in New York, NACs 
domicile, New York has issued a circular letter requiring the filing of 
risk-based capital reports by property and casualty insurers and reinsurers. 
The NAIC also adopted a proposal that requires property and casualty insurers 
and reinsurers to report the results of their risk-based capital calculations 
as part of the statutory annual statements filed with state regulatory 
authorities. Surplus (as calculated for statutory annual statement purposes) 
for each of the Company's domestic subsidiaries is well above the risk-based 
capital thresholds that would require either company or regulatory action.

    Various other legislative and regulatory initiatives have been proposed from
time-to-time that could impact the property/casualty insurance industry.
Congress is expected to consider bills targeting financial services
modernization, tax reform, Superfund and product liability reform, and natural
disaster protection. The NAIC continues to refine the risk-based capital formula
for property/casualty insurers as well as adopt model legislation and
regulations regarding insurer investments, accounting standards, and other
regulatory matters. While the Company cannot quantify the impact of any of these
legislative or regulatory measures on its operations, we believe the Company is
adequately positioned to compete in an environment of more stringent regulation.
To the extent that federal legislation, if passed, reduces litigation costs, it
would be a favorable development for the Company.

SAFE HARBOR DISCLOSURE FOR FORWARD-LOOKING STATEMENTS

    In connection with the "safe harbor" provisions of the Private Securities
Litigation Reform Act of 1995 (the "Act"), the Company sets forth below
cautionary statements identifying important factors that could cause the
Company's actual results to differ materially from those which might be
projected, forecasted, or estimated or otherwise implied in the Company's
forward-looking statements, as defined in the Act, made by or on behalf of the
Company in press releases, written statements or documents filed with the
Securities and Exchange Commission, or in its communications and discussions
with investors and analysts in the normal course of business through meetings,
telephone calls and conference calls. Such statements may include, but are not
limited to, projections of premium revenue, investment income, other revenue,
losses, expenses, earnings (including earnings per share), cash flows, plans for
future operations, common shareholders equity, financing needs, capital plans,
dividends, plans relating to products or services of the Company, and estimates
concerning the effects of litigation or other disputes, as well as assumptions
for any of the foregoing and are generally expressed with words such as
"believes," "estimates," "expects," "anticipates," "could have," "may have," and
similar expressions.

                                       32

<PAGE>

    Forward-looking statements are inherently subject to risks and
uncertainties. The Company cautions that factors which may cause the Company's
results to differ materially from such forward-looking statements include, but
are not limited to, the following:
 
    (1)  Changes in the level of competition in the reinsurance or primary 
         insurance markets that adversely affect the volume or profitability 
         of the Company's business. These changes include, but are not limited 
         to, the intensification of price competition, the entry of new 
         competitors, existing competitors exiting the market, and the 
         development of new products by new and existing competitors;
 
    (2)  Changes in the demand for reinsurance, including changes in ceding 
         companies retentions, and changes in the demand for primary and 
         excess and surplus lines insurance coverages;
 
    (3)  The ability of the Company to execute its business strategies;
 
    (4)  Changes in the frequency and severity of catastrophes which could 
         significantly impact the Company's business in terms of net income, 
         reinsurance costs, and cash flow;
 
    (5)  Adverse development on claims and claims expense liabilities related 
         to business written in prior years, including, but not limited to, 
         evolving case law and its effect on environmental and other latent 
         injury claims, changing government regulations, newly identified 
         toxins, newly reported claims, inflation, new theories of liability, 
         or new insurance and reinsurance contract interpretations;
 
    (6)  Changes in the Company's retrocessional arrangements;
 
    (7)  Lower than estimated retrocessional or reinsurance recoveries on 
         unpaid losses, including, but not limited to, losses due to a 
         decline in the creditworthiness of the Company's retrocessionnaires 
         or reinsurers;
 
    (8)  Increases in interest rates, which cause a reduction in the market 
         value of the Company's interest rate sensitive investments, 
         including, but not limited to, its fixed income investment 
         portfolio, and its common shareholders equity and decreases in 
         interest rates causing a reduction of income earned on new cash flow 
         from operations and the reinvestment of the proceeds from sales, 
         calls or maturities of existing investments;
 
    (9)  Declines in the value of the Company's common equity investments and 
         credit losses on the Company's investment portfolio; 

    (10) Gains or losses related to foreign currency exchange rate fluctuations;
         and 
      
    (11) Adverse results in litigation matters including, but not 
         limited to, litigation related to environmental, asbestos, other 
         potential mass tort claims, and claims related to the Year 2000.
 
    In addition to the factors outlined above that are directly related to the
Company's business, the Company is also subject to general business risks,
including, but not limited to, adverse state, federal or foreign legislation and
regulation, adverse publicity or news coverage, changes in general economic
factors, and the loss of key employees.
 
                                       33

<PAGE>

- -------------------------------------------------------------------------------
ELEVEN YEAR FINANCIAL SUMMARY

<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------------------
In Thousands, except per share amounts                                        1997            1996            1995            1994
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                    <C>             <C>             <C>             <C>
INCOME STATEMENT DATA
Gross premiums written ..............................................   $  723,868      $  714,080      $  677,938      $  575,037
Net premiums written ................................................      593,656         574,004         521,489         438,201
Premiums earned .....................................................      574,647         526,342         491,785         395,731
Net investment income ...............................................      123,050         104,330          89,308          80,504
Net investment gains (losses) .......................................       42,675          19,569          25,391           2,155
Total revenues ......................................................      740,372         650,241         606,484         478,390
Operating costs and expenses ........................................      617,542         561,205         527,663         436,100
Operating income ....................................................       95,677          70,520          62,824          35,612
Net income ..........................................................       95,677          70,520          62,824          35,612
Return on stockholders' equity (3)(4) ...............................        17.3%           13.8%           19.7%            9.5%
- -----------------------------------------------------------------------------------------------------------------------------------
PER SHARE DATA (5)
Basic: (6)
  Average shares outstanding ........................................       18,378          18,855          17,709          17,603
  Operating income ..................................................   $     5.21      $     3.74      $     3.55      $     2.02
  Net income ........................................................         5.21            3.74            3.55            2.02
Diluted (assuming conversion of dilutive convertible
 securities): (6)
  Average shares outstanding ........................................       20,809          21,115          20,115          19,915
  Net income ........................................................   $     4.77      $     3.51      $     3.30      $     1.96
Cash dividends declared per share ...................................         .285             .23             .19             .16
Stock prices:
    High ............................................................        52.88           40.63           39.00           34.00
    Low .............................................................        33.25           28.50           28.25           24.00
    Close ...........................................................        48.81           33.88           36.00           33.50
- -----------------------------------------------------------------------------------------------------------------------------------
BALANCE SHEET DATA
Total assets (4)(7) .................................................   $2,984,865      $2,745,631      $2,462,131      $1,916,768
Cash and invested assets (4) ........................................    2,348,034       1,983,902       1,863,526       1,414,527
Claims and claims expense reserves, gross (7) .......................    1,603,972       1,513,345       1,292,415       1,086,170
  Net of reinsurance recoverable ....................................    1,407,136       1,107,217         953,669         808,433
Long-term debt ......................................................      299,942         299,934         299,927         200,000
Unrealized appreciation (depreciation) of investments, 
  net of tax: (4)
    Fixed maturities ................................................       43,607          14,526          27,102         (44,204)
    Equity securities ...............................................       11,393          17,174           8,085          (1,826)
      Total reported ................................................       55,000          31,700          35,187         (46,030)
Stockholders' equity (4) ............................................      657,061         553,269         511,756         319,085
Stockholders' equity per share (4)(5) ...............................        35.89           30.06           26.65           18.23
- -----------------------------------------------------------------------------------------------------------------------------------
DOMESTIC STATUTORY DATA
Statutory composite ratio ...........................................       103.1%          101.1%          103.1%          105.7%
Statutory surplus ...................................................   $  702,222      $  663,867      $  615,433      $  407,024
- -----------------------------------------------------------------------------------------------------------------------------------

</TABLE>

(1) In 1992, the Company adopted SFAS No. 109, "Accounting for Income Taxes." 
    The cumulative effect from prior years increased net income by $12.1 
    million or $.68 per share.

(2) In 1988, the Company adopted the practice of discounting workers' 
    compensation tabular case reserves. The cumulative effect from prior 
    years increased net income by $1.9 million or $.12 per share. In 
    addition, 1988 income tax expense included a charge for the utilization 
    of an operating loss carry forward. The tax benefit of $1.2 million, or 
    $.08 per share, resulting from such utilization was recorded as an 
    extraordinary item.

(3) Based on net income divided by stockholders' equity as reported at the 
    beginning of each year.


34

<PAGE>

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

<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------------------
      1993             1992(1)          1991             1990             1989             1988(2)          1987          CAGR*
- -----------------------------------------------------------------------------------------------------------------------------------
<S>             <C>              <C>              <C>              <C>              <C>              <C>                 <C>
$  431,582       $  366,292       $  291,775       $  261,099       $  234,960       $  206,761       $  183,818          14.7%
   336,941          268,023          233,044          217,106          193,323          171,430          154,510          14.4
   306,379          250,533          229,358          215,085          190,657          161,978          137,376          15.4
    76,632           65,590           58,743           51,930           45,475           35,640           25,341          17.1
    19,095            9,081            5,533           (1,121)           3,236              142              878          47.5
   402,106          325,204          293,634          265,894          239,368          197,760          163,595          16.3
   352,609          321,598          251,916          236,464          209,883          177,830          151,945          15.1
    42,351           10,386           34,816           24,961           25,626           17,732           11,113          24.0
    42,351           22,443           34,816           24,961           25,626           20,827           11,113          24.0
     13.7%             9.3%            17.2%            13.4%            15.8%            14.0%             8.1%            --
- -----------------------------------------------------------------------------------------------------------------------------------

    17,895           17,789           15,403           15,630           15,623           15,762           16,304            --
$     2.37       $      .58        $    2.26       $     1.60       $     1.64       $     1.12       $      .68          22.6
      2.37             1.26             2.26             1.60             1.64             1.32              .68          22.6


    20,440           18,330           18,232           18,318           18,285           18,215           16,304            --
$     2.24       $     1.23        $    2.05       $     1.51       $     1.55       $     1.29       $      .68          21.5
       .16              .16              .14              .13              .10               --               --            --


     44.75            42.00            31.50            25.83            27.33            14.11            14.33            --
     28.00            21.75            19.33            17.00            13.78             8.22             7.78            --
     29.75            40.50            31.50            22.00            23.83            14.11             7.89            --
- -----------------------------------------------------------------------------------------------------------------------------------

$1,778,868       $1,596,209        $1,106,573      $  988,809       $  869,810       $  705,832       $  591,474          17.6
 1,412,624        1,258,016           892,581         781,591          689,481          544,304          423,286          18.7
   909,061          808,489           681,110         596,236          520,723          389,279          303,623          18.1
   697,221          626,090           528,521         468,637          387,767          291,531          201,051          21.5
   200,000          200,000            51,750          51,750           51,750           51,750           51,750          19.2


    30,865            2,402             2,374          (2,588)              --               --               --            --
     6,521            3,786             3,452          (2,958)            (323)            (158)              --            --
    37,386            6,188             5,826          (5,546)            (323)            (158)              --            --
   375,540          309,221           241,387         202,525          186,104          162,501          148,278          16.1
     21.13            17.35             15.70           12.98            11.92            10.38             9.10          14.7
- -----------------------------------------------------------------------------------------------------------------------------------

    110.9%           126.9%            108.2%          108.2%           108.5%           106.8%           107.8%            --
$  406,163       $  384,032        $  230,041      $  197,391       $  189,018       $  174,217       $  163,233          15.7
- -----------------------------------------------------------------------------------------------------------------------------------

</TABLE>

(4) The Company adopted SFAS No. 115 at December 31, 1993. As such, all of 
    the Company's fixed maturities and equity securities were classified as 
    "available for sale" and recorded at their fair values. The effect of 
    adopting SFAS No. 115 was to record in stockholders' equity unrealized 
    appreciation, net of deferred income taxes of $28.4 million, related to 
    fixed maturities that were previously recorded at amortized cost. 
    Retroactive application to prior periods is prohibited.

(5) Stock price and per share figures have been restated to reflect the 
    three-for-two stock splits effective in 1989 and 1991.

(6) Prior year data restated per SFAS No. 128. See Note 1 of the Notes of 
    Consolidated Financial Statements.

(7) Reclassified to reflect the adoption of SFAS No. 113 in 1993, which 
    requires reinsurance recoverables on claims and claims expenses 
    (including IBNR) and unearned premiums to be reported as assets.

*   Compound annual growth rate.

                                                                             35
<PAGE>

- -------------------------------------------------------------------------------
CONSOLIDATED BALANCE SHEET

<TABLE>
<CAPTION>
                                                            In Thousands
- -------------------------------------------------------------------------------
                                                              December 31,
                                                        -----------------------
                                                        1997              1996
- -------------------------------------------------------------------------------
<S>                                                     <C>              <C>
ASSETS
Investments:
Available for sale:
   Fixed maturities (amortized cost: 1997, 
     $2,021,501; 1996, $1,681,190..................... $2,088,588   $1,703,537
   Equity securities (cost: 1997, $124,999; 
     1996, $153,197)..................................    142,527      179,619
Short-term investments................................    108,489       81,893
- -------------------------------------------------------------------------------
     Total investments................................  2,339,604    1,965,049

Cash..................................................      8,430       18,853
Accrued investment income.............................     36,347       28,472
Premiums receivable...................................    227,569      200,036
Reinsurance recoverable balances, net.................    172,277      336,324
Reinsurance recoverable on unearned premiums..........     31,297       20,320
Deferred policy acquisition costs.....................     92,709       85,211
Excess of cost over net assets acquired...............      3,276        3,644
Deferred tax asset, net...............................     42,646       30,390
Other assets..........................................     30,710       57,332
- -------------------------------------------------------------------------------
     Total assets..................................... $2,984,865   $2,745,631
- -------------------------------------------------------------------------------
LIABILITIES
Claims and claims expenses............................ $1,603,972   $1,513,345
Unearned premiums.....................................    301,711      271,898
8% Notes due 1999.....................................    100,000      100,000
7.15% Notes due 2005..................................     99,942       99,934
5.25% Convertible Subordinated Debentures due 2002....    100,000      100,000
Investment accounts payable...........................     26,108       25,326
Revolving credit agreement............................     12,924       12,924
Other liabilities.....................................     83,147       68,935
- -------------------------------------------------------------------------------
     Total liabilities................................  2,327,804    2,192,362
- -------------------------------------------------------------------------------
STOCKHOLDERS' EQUITY
Preferred stock, $1.00 par value: 
   1,000 shares authorized, none issued 
   (includes 90 shares of Series A 
   Junior Participating Preferred Stock)..............       --           --
Common stock, $.10 par value: 25,000 shares
   authorized (1997, 21,707; 1996, 21,464
   shares issued)......................................     2,171        2,146
Additional paid-in capital.............................   255,424      248,662 
Unrealized appreciation of investments, net of tax.....    55,000       31,700 
Currency translation adjustments, net of tax...........     5,989        8,377 
Retained earnings......................................   426,309      335,868 
Treasury stock, at cost (1997, 3,398; 1996, 
  3,061 shares)........................................   (87,832)     (73,484)
- -------------------------------------------------------------------------------
     Total stockholders' equity........................   657,061      553,269
- -------------------------------------------------------------------------------
     Total liabilities and stockholders' equity........$2,984,865   $2,745,631
- -------------------------------------------------------------------------------
</TABLE>

See Notes to Consolidated Financial Statements.

36


<PAGE>

- ------------------------------------------------------------------------------
                                              CONSOLIDATED STATEMENT OF INCOME


<TABLE>
<CAPTION>
                                          In Thousands, except per share amounts
- --------------------------------------------------------------------------------
                                                  Year ended December 31,
                                             -----------------------------------
                                               1997         1996          1995
- --------------------------------------------------------------------------------
<S>                                          <C>          <C>          <C>      
Premiums and Other Revenues                                                     
Net premiums written......................   $593,656     $574,004     $521,489 
Increase in unearned premiums.............    (19,009)     (47,662)     (29,704)
- --------------------------------------------------------------------------------
Premiums earned...........................    574,647      526,342      491,785 
Net investment income.....................    123,050      104,330       89,308 
Net investment gains......................     42,675       19,569       25,391 
- --------------------------------------------------------------------------------
     Total revenues.......................    740,372      650,241      606,484 
- --------------------------------------------------------------------------------
                                                                                
Operating Costs and Expenses                                                    
Claims and claims expenses................    379,495      338,953      326,148 
Commissions and brokerage.................    151,152      143,324      139,063 
Other operating expenses..................     65,160       56,606       46,804 
Interest expense..........................     21,735       22,322       15,648 
- --------------------------------------------------------------------------------
     Total operating cost and expenses....    617,542      561,205      527,663 
- --------------------------------------------------------------------------------

Income
Operating income before income taxes......    122,830       89,036       78,821
Federal and foreign income taxes:
  Current.................................     50,556       23,310       18,779
  Deferred................................    (23,403)      (4,794)      (2,782)
- --------------------------------------------------------------------------------
Income tax expense (benefit)..............     27,153       18,516       15,997
- --------------------------------------------------------------------------------
Operating income/net income...............    $95,677      $70,520      $62,824
- --------------------------------------------------------------------------------

Per Share Data

Basic:*
  Average shares outstanding..............     18,378       18,855       17,709
  Operating income/net income.............      $5.21        $3.74        $3.55
- --------------------------------------------------------------------------------
Diluted (assuming conversion 
 of dilutive convertible securities):*
  Average shares outstanding..............     20,809       21,115       20,115
  Operating income/net income.............      $4.77        $3.51        $3.30
- --------------------------------------------------------------------------------
Cash dividends declared per share.........      $.285         $.23         $.19
- --------------------------------------------------------------------------------
</TABLE>

See Notes to Consolidated Financial Statements.
* Prior year data restated per SFAS No. 128.

                                                                              37

<PAGE>

- -------------------------------------------------------------------------------
CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                               In Thousands
- -------------------------------------------------------------------------------------------
                                                          Year ended December 31,
                                              ---------------------------------------------
                                                1997             1996           1995
- -------------------------------------------------------------------------------------------
<S>                                               <C>               <C>            <C>
Common Stock
  Balance at beginning of year                    $   2,146         $  2,134       $  1,964
  Issuance of shares                                     25               12            170
- -------------------------------------------------------------------------------------------
    Balance at end of year                            2,171            2,146          2,134
- -------------------------------------------------------------------------------------------

Additional Paid-Capital 
  Balance at beginning of year                      248,662          246,356        194,231
  Issuance of shares                                  6,762            2,306         52,125
- -------------------------------------------------------------------------------------------
    Balance at end of year                          255,424          248,662        246,356
- -------------------------------------------------------------------------------------------

Unrealized Appreciation (Depreciation) of
Investments, Net of Tax
  Balance at beginning of year                       31,700           35,187        (46,030)
  Unrealized appreciation (depreciation)             23,300           (3,487)        81,217
- -------------------------------------------------------------------------------------------
    Balance at end of year                           55,000           31,700         35,187
- -------------------------------------------------------------------------------------------

Currency Translation Adjustments, Net of Tax  
  Balance at beginning of year                        8,377            1,017          1,059
  Translation adjustments                            (2,388)           7,360            (42)
- -------------------------------------------------------------------------------------------
    Balance at end of year                            5,989            8,377          1,017
- -------------------------------------------------------------------------------------------

Retained Earnings
  Balance at beginning of year                      335,868          269,660        210,255
  Net income                                         95,677           70,520         62,824
  Dividends                                          (5,236)          (4,312)        (3,419)
- -------------------------------------------------------------------------------------------
    Balance at end of year                          426,309          335,868        269,660
- -------------------------------------------------------------------------------------------

Treasury Stock
  Balance at beginning of year                      (73,484)         (42,598)       (42,394)
  Purchase of treasury shares, net of reissuance    (14,348)         (30,886)          (204)
- -------------------------------------------------------------------------------------------
    Balance at end of year                          (87,832)         (73,484)       (42,598)
- -------------------------------------------------------------------------------------------

Total Stockholders' Equity                         
  Balance at beginning of year                      553,269          511,756        319,085
  Issuance of shares                                  6,787            2,318         52,295 
  Unrealized appreciation (depreciation)             23,300           (3,487)        81,217 
  Translation adjustments                            (2,388)           7,360            (42)
  Net income                                         95,677           70,520         62,824 
  Dividends                                          (5,236)          (4,312)        (3,419)
  Purchase of treasury shares, net of reissuance    (14,348)         (30,886)          (204)
- --------------------------------------------------------------------------------------------
    Balance at end of year                         $657,061         $553,269       $511,756
- --------------------------------------------------------------------------------------------
</TABLE>
See Notes to Consolidated Financial Statements.



  38

<PAGE>

- -------------------------------------------------------------------------------
                                           CONSOLIDATED STATEMENT OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                                          In Thousands
- ------------------------------------------------------------------------------------------------------------------
                                                                                      Year ended December 31,
                                                                                 ---------------------------------
                                                                                   1997        1996        1995
- ------------------------------------------------------------------------------------------------------------------
<S>                                                                              <C>         <C>         <C>
Operating Activities                                                                                     
  Net income...................................................................  $  95,677   $  70,520   $  62,824
  Adjustments to reconcile net income to net cash provided by operating                                  
    activities:                                                                                          
      Reserve for claims and claims expenses, net..............................    300,609     147,927     145,404
      Unearned premiums, net...................................................     19,025      47,703      29,584
      Premiums receivable......................................................    (27,692)    (43,512)    (34,415)
      Accrued investment income................................................     (7,903)     (1,266)     (6,916)
      Reinsurance balances, net................................................    (33,637)    (18,063)      6,976
      Deferred policy acquisition costs........................................     (7,522)    (14,518)    (10,523)
      Net investment gains.....................................................    (42,678)    (19,577)    (25,386)
      Deferred tax asset, net..................................................    (24,499)     (4,980)     (2,781)
      Other liabilities........................................................     12,937       6,447         950
      Other items, net.........................................................     30,055      (4,564)      8,194
- ------------------------------------------------------------------------------------------------------------------
Net Cash Provided By Operating Activities......................................    314,372     166,117     173,911
- ------------------------------------------------------------------------------------------------------------------

Investing Activities                                                                                     
    Sales of fixed maturity investments........................................  1,469,950   1,336,125   1,479,415
    Maturities of fixed maturity investments...................................     31,680      31,094      31,099
    Purchases of fixed maturity investments.................................... (1,839,020) (1,508,258) (1,849,492)
    Net (purchases) sales of short-term investments............................    (27,212)     53,646       3,072
    Sales of equity securities.................................................    154,196      79,569     101,918
    Purchases of equity securities.............................................    (94,681)   (104,917)    (84,910)
    Purchases of furniture and equipment.......................................     (5,634)     (6,775)     (2,365)
- ------------------------------------------------------------------------------------------------------------------
Net Cash Used By Investing Activities..........................................   (310,721)   (119,516)   (321,263)
- ------------------------------------------------------------------------------------------------------------------
Financing Activities                                                                                     
    Issuance of shares.........................................................      5,864       1,951      52,056
    Net proceeds from issuance of 7.15% Notes..................................         --          --      99,214
    Purchase of treasury shares, net of reissuance.............................    (14,348)    (30,886)       (204)
    Cash dividends paid to stockholders........................................     (4,968)     (4,163)     (3,260)
    Borrowings under revolving credit agreement................................         --       8,162          --
    Repayments under revolving credit agreement...............................          --     (13,000)         --
- ------------------------------------------------------------------------------------------------------------------
Net Cash (Used) Provided By Financing Activities...............................    (13,452)    (37,936)    147,806
- ------------------------------------------------------------------------------------------------------------------
Effects of exchange rate changes on cash.......................................       (622)       (132)        242
- ------------------------------------------------------------------------------------------------------------------
(Decrease) increase in cash....................................................    (10,423)      8,533         696
Cash -- beginning of year......................................................     18,853      10,320       9,624
- ------------------------------------------------------------------------------------------------------------------
Cash -- end of year............................................................  $   8,430   $  18,853   $  10,320
- ------------------------------------------------------------------------------------------------------------------
</TABLE>
 
See Notes to Consolidated Financial Statements.


                                                                             39

<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
BASIS OF PRESENTATION
 
    The consolidated financial statements have been prepared on the basis of
generally accepted accounting principles ("GAAP") and include the accounts of
NAC Re Corp. ("NAC Re") and its insurance and reinsurance subsidiaries NAC
Reinsurance Corporation ("NAC"), Greenwich Insurance Company, Indian Harbor
Insurance Company and NAC Re International Holdings Limited and its
subsidiaries. NAC Re and its subsidiaries are collectively referred to herein as
the Company. All intercompany transactions and balances have been eliminated in
consolidation.
 
    The preparation of the financial statements in conformity with GAAP requires
the use of estimates and assumptions that affect amounts reported in the
financial statements and the accompanying notes. Actual results could differ
from such estimates.
 
PREMIUM REVENUES AND RELATED EXPENSES
 
    Property/casualty premiums are recognized as income over the terms of the
related reinsurance contracts and policies. Unearned premium reserves represent
the portion of premiums written that relate to the unexpired terms of contracts
and policies in force. Such reserves are computed by pro rata methods based on
statistical data or reports received from ceding companies. Certain of the
Company's assumed and retrocession agreements include provisions that adjust
premium payments based upon the experience under the contracts. Premiums are
recorded based upon the expected ultimate experience under the agreements.
 
    Acquisition costs, consisting principally of commissions and brokerage
expenses incurred at the time a contract or policy is issued, are deferred and
amortized over the period in which the related premiums are earned. Deferred
policy acquisition costs are limited to their estimated realizable value based
on the related unearned premiums and take into account anticipated claims and
claims expenses, based on historical and current experience, and anticipated
investment income.
 
INVESTMENTS
 
    Fixed maturities, which include bonds, notes and redeemable preferred stocks
and equity securities, including common and non-redeemable preferred stocks have
been categorized as "available for sale" and recorded at their fair value. The
fair value of fixed maturities and equity securities is estimated using quoted
market prices or dealer quotes. Short-term investments, which have an original
maturity of one year or less, are carried at cost, which approximates fair
value.
 
    The Company categorizes all of its fixed maturities and equity securities as
available for sale in order to provide the Company the flexibility to respond to
various factors, including changes in market conditions and tax planning
considerations. Unrealized appreciation or depreciation of the securities
available for sale, net of applicable deferred income taxes, is excluded from
income, and recorded as a separate component of stockholders equity.
 
    Realized investment gains or losses on the sale or maturity of investments
are determined by the specific identification method. Net investment income,
consisting of dividends and interest, net of investment expenses, is recognized
when earned. The amortization of premium and accretion of discount for fixed
maturities is computed utilizing the interest method. The effective yield
utilized in the interest method is adjusted when sufficient information exists
to estimate the probability and timing of prepayments.
 
                                       40
<PAGE>

CLAIMS AND CLAIMS EXPENSES
 
    The reserves for claims and claims expenses are based on the Company's
analysis of reports and individual case estimates received from ceding
companies. An amount is included for claims and claims expenses incurred but not
reported on the basis of past experience of the Company and the reinsurance
industry. These estimates are reviewed regularly and, as claims develop and new
information becomes known, the reserves are adjusted as necessary. Such
adjustments, if any, are reflected in results of operations in the period in
which they become known and are accounted for as changes in estimates. Reserves
are generally recorded without consideration of potential salvage or subrogation
recoveries which are estimated to be immaterial; such recoveries, when realized,
are reflected as a reduction of claims incurred. Certain workers compensation
case reserves are considered fixed and determinable and are subject to tabular
reserving. Such tabular reserves are discounted using an interest rate of 7%.
 
INCOME TAXES
 
    The Company utilizes the liability method of accounting for income taxes.
Under the liability method, 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. A
valuation allowance is established for any portion of a deferred tax asset that
management believes will not be realized.
 
STOCK PLANS
 
    The Company accounts for stock compensation plans in accordance with
Accounting Principals Board ("APB") Opinion No. 25, "Accounting for Stock Issued
to Employees." Accordingly, compensation expense for stock option grants and
stock appreciation rights ("SARs") is recognized to the extent that the fair
value of the stock exceeds the exercise price of the option at the measurement
date.
 
PER SHARE DATA
 
    In 1997, the Financial Accounting Standards Board ("FASB") issued Statement
of Financial Accounting Standards ("SFAS") No. 128, "Earnings per Share." This
Statement replaced the historical presentation of primary and fully diluted
earnings per share with basic and diluted earnings per share. Basic earnings per
share is based on weighted average common shares and excludes any dilutive
effects of options and convertible securities. Diluted earnings per share
assumes the conversion of dilutive convertible securities and the exercise of
all dilutive stock options. All earnings per share amounts for all periods have
been presented, and where appropriate, restated to conform to the Statement No.
128 requirements. See Note 12 for information with respect to the computation of
earnings per share.
 
FURNITURE, EQUIPMENT AND LEASEHOLD IMPROVEMENTS
 
    The costs of furniture and equipment are charged against income over their
estimated service lives. Leasehold improvements are amortized over the remaining
terms of the office leases. Depreciation and amortization are computed using the
straight-line method. Maintenance and repairs are charged to expense as
incurred. Depreciation and amortization expense was approximately $3.5 million,
$3.0 million and $2.2 million for the years ended December 31, 1997, 1996 and
1995, respectively.

                                         41
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


FOREIGN EXCHANGE
 
    The assets and liabilities of foreign operations are translated at the 
rate of exchange in effect at the balance sheet date. Revenues and expenses 
of foreign operations are translated at the average exchange rates during the 
year. The effect of the translation adjustments for foreign operations is 
recorded as a cumulative translation adjustment in a separate component of 
stockholders equity, net of applicable deferred income taxes. Foreign 
currency transaction gains and losses are included in net income and are not 
material.
 
COST IN EXCESS OF NET ASSETS ACQUIRED
 
    The excess of cost over net assets acquired is amortized on a straight-line
basis over a period of twenty years. Amortization charged to operating expenses
was approximately $368,000 for each of the years ended December 31, 1997, 1996
and 1995.
 
2. ACCOUNTING PRONOUNCEMENTS
 
    In June 1997, the FASB issued SFAS No. 130, "Reporting Comprehensive
Income," which is effective for years beginning after December 15, 1997.
Statement No. 130 requires that a company classify items that meet the
definition of components of other comprehensive income in a financial statement
and display the accumulated balance of other comprehensive income in the equity
section of the statement of financial position. Comprehensive income includes
all changes in equity during a period resulting from transactions and other
events from nonowner sources. Reclassification of prior period financial
statements is required for comparative purposes. The Company will apply the
provisions of this Statement beginning in the first quarter of 1998.
 
    If the Company adopted Statement No. 130 for the year ended December 31,
1997, comprehensive income would be as follows:

<TABLE>
<CAPTION>
                                                                                          IN THOUSANDS
                                                                                    ------------------------
                                                                                     YEAR ENDED DECEMBER 31,
                                                                                    ------------------------
                                                                                        1997        1996
                                                                                    -----------  -----------
<S>                                                                                 <C>         <C>
Net income........................................................................  $    95,677  $    70,520
Change in unrealized appreciation (depreciation), net of tax......................       23,300       (3,487)
Change in foreign currency translation adjustments, net of tax....................       (2,388)       7,360
                                                                                    -----------  -----------
Comprehensive income..............................................................  $   116,589  $    74,393
                                                                                    -----------  -----------
                                                                                    -----------  -----------

</TABLE>
 
    Accumulated other comprehensive income for the Company would include
unrealized appreciation or depreciation of investments, net of tax, and foreign
currency translation adjustments, net of tax, and would total $61 million at
December 31, 1997.
 
    Also in June 1997, the FASB issued SFAS No. 131, "Disclosures about Segments
of an Enterprise and Related Information," which is effective for years
beginning after December 15, 1997. Statement No. 131 establishes standards for
the way that companies report information about operating segments in annual
financial statements and requires that those companies report selected
information about operating segments in interim financial reports. It also
establishes standards for related disclosures about products and services,
geographic areas, and major customers. The Company plans to adopt the Statement
in the 

                                       42

<PAGE>

1998 annual financial statements. The Company has not completed its
analysis of all matters associated with the implementation, but the effect of
adopting this Statement will not be material to the Company's financial 
position. 
 
3. INVESTMENT INFORMATION

INVESTMENT INCOME

The components of net investment income were as follows:

<TABLE>
<CAPTION>
                                                                                           IN THOUSANDS
                                                                                 ---------------------------------
                                                                                      YEAR ENDED DECEMBER 31,
                                                                                 ---------------------------------
                                                                                    1997        1996       1995
                                                                                 ----------  ----------  ---------
<S>                                                                              <C>         <C>         <C>
Fixed maturities...............................................................  $  112,738  $   97,048  $  81,485
Equity securities..............................................................       6,373       5,228      4,371
Cash and short-term investments................................................       7,110       7,271      8,341
                                                                                 ----------  ----------  ---------
Gross investment income........................................................     126,221     109,547     94,197
Interest (benefit) expense.....................................................      (1,646)        472        685
Investment expenses............................................................       4,817       4,745      4,204
                                                                                 ----------  ----------  ---------
Net investment income..........................................................  $  123,050  $  104,330  $  89,308
                                                                                 ----------  ----------  ---------
                                                                                 ----------  ----------  ---------
</TABLE>
 
Investment Gains (Losses) 

Realized and unrealized investment gains (losses) were as follows:

<TABLE>
<CAPTION>
                                                                                            IN THOUSANDS
                                                                                   -------------------------------
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
Net realized investment gains:                                                       1997       1996       1995
- ---------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
  Fixed maturities...............................................................  $  10,345  $   7,243  $  17,868
  Equity securities..............................................................     32,330     12,326      7,523
                                                                                   ---------  ---------  ---------
  Subtotal.......................................................................     42,675     19,569     25,391
  Tax expense....................................................................     14,682      6,861      8,422
                                                                                   ---------  ---------  ---------
  Net realized investment gains, net of tax......................................  $  27,993  $  12,708  $  16,969
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
Change in unrealized appreciation (depreciation) of investments:
                                                                                    
  Fixed maturities...............................................................   $ 44,742   $(19,348)  $ 85,899
  Equity securities..............................................................     (8,894)    13,983     14,265
                                                                                   ---------  ---------  ---------
  Subtotal.......................................................................     35,848     (5,365)   100,164
  Increase (decrease) in deferred income tax liability...........................     12,548     (1,878)    18,947
                                                                                   ---------  ---------  ---------
  Net change reflected in stockholders equity....................................   $ 23,300    $(3,487)  $ 81,217
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
</TABLE>
 
                                       43
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


    The following tables reconcile amortized cost to the estimated fair value
(which equals carrying value) of fixed maturity securities and equity
securities.

<TABLE>
<CAPTION>
                                                                                   IN THOUSANDS
                                                               ---------------------------------------------------
                                                                                 DECEMBER 31, 1997
                                                               ---------------------------------------------------
                                                                                GROSS        GROSS
                                                                AMORTIZED    UNREALIZED    UNREALIZED      FAIR
                                                                   COST         GAINS        LOSSES       VALUE
                                                               ------------  -----------  ------------  ----------
<S>                                                            <C>           <C>          <C>           <C>
Available for Sale:
  U.S. Treasury..............................................  $     13,957   $     550        --       $   14,507
  Tax-exempt.................................................     1,200,314      51,892        $(1,233)  1,250,973
  Foreign Government.........................................       166,899       5,624           (202)    172,321
  Corporate..................................................       419,715       8,826         (2,684)    425,857
  Mortgage-backed............................................       212,434       4,686           (275)    216,845
  Subordinated convertibles..................................         8,182         434           (531)      8,085
                                                               ------------  -----------  ------------  ----------
  Total fixed maturities.....................................     2,021,501      72,012         (4,925)  2,088,588
  Equity securities..........................................       124,999      19,122         (1,594)    142,527
                                                               ------------  -----------  ------------  ----------
                                                                              
  Total......................................................  $  2,146,500    $ 91,134        $(6,519) $2,231,115
                                                               ------------  -----------  ------------  ----------
                                                               ------------  -----------  ------------  ----------
</TABLE>

<TABLE>
<CAPTION>
                                                                                   IN THOUSANDS
                                                               ---------------------------------------------------
                                                                                 DECEMBER 31, 1996
                                                               ---------------------------------------------------
                                                                                GROSS        GROSS
                                                                AMORTIZED    UNREALIZED    UNREALIZED      FAIR
                                                                   COST         GAINS        LOSSES       VALUE
                                                               ------------  -----------  ------------  ----------
<S>                                                            <C>           <C>          <C>           <C>
Available for Sale:
  U.S. Treasury..............................................  $     71,354        $431        $(1,177)    $70,608
  Tax-exempt.................................................       828,501      21,853         (1,964)    848,390
  Foreign Government.........................................       160,490       2,452           (954)    161,988
  Corporate..................................................       377,294       4,456         (4,924)    376,826
  Mortgage-backed............................................       191,467         734         (2,453)    189,748
  Subordinated convertibles..................................        52,084       5,030         (1,137)     55,977
                                                               ------------  -----------  ------------  ----------
  Total fixed maturities.....................................     1,681,190      34,956        (12,609)  1,703,537
  Equity securities..........................................       153,197      29,918         (3,496)    179,619
                                                               ------------  -----------  ------------  ----------
                                                                               
  Total......................................................  $  1,834,387    $ 64,874       $(16,105) $1,883,156
                                                               ------------  -----------  ------------  ----------
                                                               ------------  -----------  ------------  ----------
</TABLE>
 
                                       44

<PAGE>

    Contractual maturities of fixed maturity securities are shown below.
Expected maturities, which are best estimates, will differ from contractual
maturities because borrowers may have the right to call or prepay obligations
with or without call or prepayment penalties.

<TABLE>
<CAPTION>
                                                                                               IN THOUSANDS
                                                                                        --------------------------
                                                                                            DECEMBER 31, 1997
                                                                                        --------------------------
                                                                                         AMORTIZED        FAIR
                                                                                            COST         VALUE
                                                                                        ------------  ------------
<S>                                                                                     <C>           <C>
Available for Sale:
  Due in one year or less.............................................................  $      6,136  $      6,239
  Due after one year through five years...............................................       274,723       281,087
  Due after five years through ten years..............................................       799,247       826,608
  Due after ten years.................................................................       728,961       757,809
                                                                                        ------------  ------------
  Subtotal............................................................................     1,809,067     1,871,743
  Mortage-backed securities...........................................................       212,434       216,845
                                                                                        ------------  ------------
  Total...............................................................................  $  2,021,501  $  2,088,588
                                                                                        ------------  ------------
</TABLE>
 
    The weighted average contractual and expected maturities, based on fair
value, of the fixed maturity investments excluding convertible securities, as of
December 31, 1997 were 11.4 years and 7.9 years, respectively.
 
    Proceeds from the sales of fixed maturity securities during 1997, 1996 and
1995 were $1,470.0 million, $1,336.1 million and $1,479.4 million, respectively.
Gross gains of $20.7 million, $16.3 million and $25.3 million were realized on
those sales during 1997, 1996 and 1995, respectively. Gross losses of $10.3
million, $9.1 million and $7.4 million were realized during 1997, 1996 and 1995,
respectively.
 
    Approximately 94% of all fixed maturity investments held at December 31,
1997, were considered investment grade by Standard and Poors or Moodys Investor
Services, Inc.
 
Securities on Deposit 
Securities with a face amount of $68.6 million at December 31, 1997, were on 
deposit with various state or governmental insurance departments in order to 
comply with insurance laws.
 
Assets Held in Escrow 
Included in NAC Res cash and invested assets at December 31, 1997 is 
approximately $23.8 million of assets held in a "holding company" escrow 
account arising from a tax allocation agreement between NAC Re and its 
domestic subsidiaries. The agreement provides that each subsidiary must remit 
to NAC Re its tax liability based upon its separate return. The excess of the 
taxes paid by the subsidiaries to NAC Re over the consolidated groups tax 
liability are restricted for current operating use, but may become available 
for unrestricted use two years following the filing of the consolidated tax 
return that generated the asset. Approximately $9 million of the escrow 
balance will become available for use in 1998.
 
                                       45
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


4. CLAIMS AND CLAIMS EXPENSES
 
    The following table represents an analysis of paid and unpaid claims and
claims expenses and a reconciliation of beginning and ending reserve balances
for the years indicated.
 
<TABLE>
<CAPTION>
                                                                                        IN THOUSANDS
                                                                                  YEAR ENDED DECEMBER 31,
                                                                          ----------------------------------------
                                                                              1997          1996          1995
                                                                          ------------  ------------  ------------
<S>                                                                       <C>           <C>           <C>
Reserves for claims and claims expenses, at beginning of year...........  $  1,513,345  $  1,292,415  $  1,086,170
Reinsurance recoverables, at beginning of year..........................       406,128       338,746       277,737
Reserves for claims and claims expenses, net of reinsurance
  recoverables, at beginning of year....................................     1,107,217       953,669       808,433
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
Provision for claims and claims expenses, net of reinsurance, occurring
  in the current year...................................................       418,091       372,294       345,783
Decrease in estimated claims and claims expenses, net of reinsurance,
  occurring in prior years..............................................       (38,596)      (33,341)      (19,635)
                                                                          ------------  ------------  ------------
Total incurred claims and claims expenses, net of reinsurance...........       379,495       338,953       326,148
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
Less payments for claims and claims expenses, net of reinsurance,
  occurring during:
  The current year......................................................        52,370        44,025        40,123
  Prior years...........................................................        26,548       146,399       140,263
                                                                          ------------  ------------  ------------
    Total...............................................................        78,918       190,424       180,386
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
Effects of exchange rate changes on reserves............................          (658)        5,019          (526)
                                                                          ------------  ------------  ------------
Reserves for claims and claims expenses, net of reinsurance
  recoverables, at end of year..........................................     1,407,136     1,107,217       953,669
Reinsurance recoverables, at end of year................................       196,836       406,128       338,746
                                                                          ------------  ------------  ------------
Reserves for claims and claims expenses, at end of year.................  $  1,603,972  $  1,513,345  $  1,292,415
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
</TABLE>
 
    Estimates of claims and claims expenses are based in part on a prediction 
of future events, estimates of future trends in claims severity and frequency 
and other variable factors. The Company's ability to predict future trends 
based upon its own historical claims experience is inherently difficult 
because of its substantial growth in premiums since 1985. Therefore, the 
Company has supplemented its historical claims experience to a certain extent 
with claims experience derived from external sources, such as reinsurance 
industry data, for purposes of evaluating future trends and providing an 
estimate of ultimate claims costs. As the Company's book of business 
continues to mature, its own historical claims experience achieves greater 
credibility and enhances its ability to evaluate future trends. Accordingly, 
the Company believes its reserving process improves as additional claims 
experience emerges. 

                                     46

<PAGE>
 
    Claims and claims expenses reflect favorable claims development from prior
years. Net favorable claims development for business written since 1986
continued to emerge during 1997, 1996 and 1995. This favorable development is
affected by several factors, some of which are interdependent. A principal
factor is the strength of the actuarial assumptions underlying the business
written, particularly with respect to the consideration given to social and
economic inflation. These actuarial assumptions are utilized to establish the
expected loss ratio employed in the actuarial methodologies used to establish
the reserves for claims and claims expenses. Such loss ratios are periodically
adjusted to reflect comparisons of actuarially computed expected to actual
claims and claims expense development, inflation and other considerations. This
favorable development has offset certain unfavorable development for business
written prior to 1986, principally related to asbestos and environmental 
claims. 
 
    The Company's incurred claims and claims expenses include a provision of 
$3.7 million, $1.2 million and $1.4 million in 1997, 1996 and 1995, 
respectively, for estimates of actual and potential non-recoveries from 
retrocessionnaires. Included in claims and claims expense reserves at 
December 31, 1997, 1996 and 1995 is a reserve for potential non-recoveries 
from retrocessionnaires of $13.8 million, $12.7 million and $10.7 million, 
respectively. Such charges for non-recoveries relate principally to 
retrocessional contracts for business written prior to 1986. See Note 
6--Retrocession Agreements.
 
    Except for certain workers compensation case reserves, the Company does 
not discount its claims and claims expense reserves. The Company utilizes 
tabular reserving for workers compensation case reserves that are considered 
fixed and determinable and discounts such reserves using an interest rate of 
7% for financial statements prepared in accordance with GAAP and a 5% 
interest rate for statutory accounting purposes. The tabular reserving 
methology results in applying a uniform and consistent criteria for 
establishing expected future indemnity and medical payments (including an 
explicit factor for inflation) and the use of mortality tables to determine 
expected payment periods.
 
    Tabular reserves, net of reinsurance, reflected in the GAAP financial
statements for the years ending December 31, 1997, 1996 and 1995 were $42.4
million, $35.8 million and $29 million, respectively. The related discounted
case reserves, net of reinsurance, were $16.1 million, $15 million and $10.6
million as of December 31, 1997, 1996 and 1995, respectively.
 
Asbestos and Environmental Related Claims 
The Company's reserving process includes a continuing evaluation of the 
potential impact on claims liabilities from exposure to asbestos and 
environmental claims, including related loss adjustment expenses. Liabilities 
are established to cover both known and incurred but not reported claims.

                                        47

<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

    A reconciliation of the beginning and ending reserves related to asbestos
and environmental exposure claims for the years indicated is as follows:
 
<TABLE>
<CAPTION>
                                                                                            IN THOUSANDS
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
                                                                                     1997       1996       1995
                                                                                   ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Reserves for claims and claims expenses, net of reinsurance recoverables, at
  beginning of year..............................................................  $  28,500  $  22,029  $  19,849
Provisions for claims and claims expenses, net of reinsurance....................      8,067     10,683      6,989
Less payments for claims and claims expenses, net of reinsurance.................      3,800      4,212      4,809
                                                                                   ---------  ---------  ---------
Reserves for claims and claims expenses, net of reinsurance recoverables, at end
  of year........................................................................     32,767     28,500     22,029
Reinsurance recoverables, at end of year.........................................     37,905     32,584     35,135
                                                                                   ---------  ---------  ---------
Reserves for claims and claims expenses, gross of reinsurance recoverables, at
  year end.......................................................................  $  70,672  $  61,084  $  57,164
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
</TABLE>
 
    Incurred but not reported claims and claims expense reserves (IBNR), net of
reinsurance, included in the above table totaled $16.6 million in 1997, $13.4
million in 1996 and $10.3 million in 1995. Ceded liabilities reflect amounts
expected to be recoverable from retrocessionnaires, after reduction for
potential uncollectible amounts.
 
    As of December 31, 1997 and 1996, the Company had approximately 380 and 300
open claim files, respectively, for potential asbestos exposures and 840 and 800
open claim files, respectively, for potential environmental exposures.
Approximately 49% and 53% of the total open claim files for 1997 and 1996,
respectively, are due to precautionary claim notices. Precautionary claim
notices are submitted by the ceding company in order to preserve their right to
receive coverage under the reinsurance contract. Such notices do not contain an
incurred loss amount to the Company. The Company actively evaluates potential
exposure to asbestos and environmental claims and records claims and claims
expense reserves as appropriate.
 
    The Company believes it has made a reasonable provision for its asbestos and
environmental exposures and is unaware of any specific issues which would
materially affect its claims and claims expense estimate. The estimation of
claims and claims expense liabilities for asbestos and environmental exposures
is subject to a much greater uncertainty than is normally associated with the
establishment of liabilities for certain other exposures due to several factors,
including: i) uncertain legal interpretation and application of insurance and
reinsurance coverage and liability; ii) the lack of reliability of available
historical claims data as an indicator of future claims development; iii) an
uncertain political climate which may impact, among other areas, the nature and
amount of costs for remediating waste sites; and iv) the potential of insurers
and policyholders to reach agreements in order to avoid further significant
legal costs. Due to the potential significance of these uncertainties, the
Company believes that no meaningful range of claims and claims expense
liabilities beyond recorded reserves can be established. As these uncertainties
are resolved, additional reserve provisions, which could be material in amount,
may be necessary.

                                           48

<PAGE>

5. INCOME TAXES
 
    The provision for federal income taxes has been determined on the basis of a
consolidated tax return consisting of NAC Re and its subsidiaries.
 
    The income tax provision in the consolidated statement of income gives
effect to permanent differences between financial and taxable income. Due to the
contribution of tax-exempt income and other factors as noted below, the 
Company's
effective income tax rate is less than the statutory rate on operating income.
An analysis of the Company's effective tax rate is as follows: 

<TABLE>
<CAPTION>
                                                                                     IN THOUSANDS
                                                                                 YEAR ENDED DECEMBER 31,
                                                                   ---------------------------------------------------
                                                                        1997              1996              1995
                                                                   ---------------   ---------------   ---------------
                                                                             % OF              % OF              % OF
                                                                            PRETAX            PRETAX            PRETAX
                                                                   AMOUNT   INCOME   AMOUNT   INCOME   AMOUNT   INCOME
                                                                   -------  ------   -------  ------   -------  ------
<S>                                                                <C>      <C>      <C>      <C>      <C>      <C>
Income taxes computed on pretax operating income.................  $42,991    35%    $31,163    35%    $27,587    35%
(Reduction) increase in taxes resulting from:
    Tax-exempt investment income.................................  (16,680)  (14)    (12,272)  (14)    (10,150)  (13)
    Dividend received deduction..................................   (1,219)   (1)       (895)   (1)       (822)   (1)
    Other, net...................................................    2,061     2         520     1        (618)   (1)
                                                                   -------  ------   -------  ------   -------  ------
Tax expense on operating income..................................  $27,153    22%    $18,516    21%    $15,997    20%
                                                                   -------  ------   -------  ------   -------  ------
</TABLE>
 
    Significant components of the provision for income taxes attributable to
operations were as follows:
 
<TABLE>
<CAPTION>
                                                                                            IN THOUSANDS
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
                                                                                     1997       1996       1995
                                                                                   ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Current expense:
    Federal......................................................................  $  43,754  $  19,879  $  17,809
    Foreign......................................................................      6,802      3,431        970
                                                                                   ---------  ---------  ---------
Total current expense............................................................     50,556     23,310     18,779
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
Deferred (benefit) expense:
    Federal......................................................................    (23,205)    (4,845)    (3,245)
    Foreign......................................................................       (198)        51        463
                                                                                   ---------  ---------  ---------
Total deferred benefit...........................................................    (23,403)    (4,794)    (2,782)
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
Total tax expense................................................................  $  27,153  $  18,516  $  15,997
                                                                                   ---------  ---------  ---------
</TABLE>
 
    The Company's current federal tax expense for the years 1997, 1996 and 1995
was based on regular taxable income. Federal and foreign taxes paid in the years
1997, 1996 and 1995 were $35 million, $22 million and $19 million, respectively.
 
                                       49


<PAGE>


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Significant components of the Company's deferred tax assets and liabilities
as of December 31, 1997 and 1996 were as follows:


<TABLE>
<CAPTION>
                                                                                IN THOUSANDS
                                                                            --------------------
                                                                                DECEMBER 31,
                                                                            --------------------
                                                                              1997       1996
                                                                            ---------  ---------
<S>                                                                         <C>        <C>
Deferred tax asset:
  Net claims reserve discount.............................................  $  87,704  $  62,629
  Net unearned premiums...................................................     18,854     17,524
  Compensation liabilities................................................      6,195      4,756
  Other...................................................................      2,631      2,129
                                                                            ---------  ---------
Deferred tax asset........................................................    115,384     87,038
                                                                            ---------  ---------
Deferred tax liability:
  Deferred policy acquisition costs.......................................     32,375     29,766
  Unrealized appreciation of investments..................................     29,616     17,068
  Currency translation adjustments........................................      3,225      4,511
  Other...................................................................      7,522      5,303
                                                                            ---------  ---------
Deferred tax liability....................................................     72,738     56,648
                                                                            ---------  ---------
Net deferred tax asset....................................................  $  42,646  $  30,390
                                                                            ---------  ---------
</TABLE>


Stockholders equity at December 31, 1997 and 1996 reflects tax benefits of
$4.5 million and $3.1 million, respectively, related to compensation expense
deductions for stock options exercised.

    As a result of the merger of its previously existing parent into NAC Re in
January 1987, $12 million of tax loss carryforwards are currently available for
use to offset future taxable income of NAC Re under the separate return
limitation year rules, with the following expiration dates: $1.8 million
expiring in 1998, $6.2 million expiring in 1999, $3.9 million expiring in 2000
and $.1 million expiring in 2001. A deferred tax asset was not recorded for
these loss carryforwards, as the Company does not expect to utilize these
carryforwards in future years.


6. RETROCESSION AGREEMENTS

The Company utilizes retrocession agreements principally to increase
aggregate premium capacity and to reduce the risk of loss on reinsurance
underwritten. In addition, the Company maintains catastrophe reinsurance
programs for the purpose of limiting its exposure with respect to multiple
claims arising from a single occurrence or event. The Company's retrocession
agreements provide for recovery of a portion of claims and claims expenses from
retrocessionnaires. Reinsurance recoverables are recorded as assets, predicated
on the retrocessionnaires ability to meet their obligations under the
retrocession agreements. If the retrocessionnaires are unable to satisfy their
obligation under the agreements, the Company would be liable for such defaulted
amounts.


                                        50

<PAGE>


The effect of retrocessional activity on premiums written and earned is set
forth below:

<TABLE>
<CAPTION>
                                                                       IN THOUSANDS
                                      --------------------------------------------------------------------------------
                                                  PREMIUMS WRITTEN                           PREMIUMS EARNED
                                      --------------------------------------   ----------------------------------------
                                               YEAR ENDED DECEMBER 31,                   YEAR ENDED DECEMBER 31,
                                      --------------------------------------   ----------------------------------------
                                         1997          1996          1995          1997          1996         1995
                                      -----------  ------------  ------------  ------------  ------------  ------------
<S>                                   <C>           <C>           <C>           <C>           <C>           <C>
Direct..............................  $  120,483    $   72,810    $   70,183    $   88,622    $   65,667    $   58,475
Assumed.............................     603,385       641,270       607,755       604,512       608,542       583,764
Ceded...............................    (130,212)     (140,076)     (156,449)     (118,487)     (147,867)     (150,454)
                                      -----------  ------------  ------------  ------------  ------------  ------------
Net.................................  $  593,656    $  574,004    $  521,489    $  574,647    $  526,342    $  491,785

</TABLE>


The Company recorded ceded claims and claims expenses incurred of $51
million, $123.2 million and $120.4 million for the years ended December 31,
1997, 1996 and 1995, respectively. The decrease from 1996 is due to the
terminations of two retrocessional programs discussed later in this Note.

The Company's balance sheet as of December 31, 1997 and 1996 reflects
reinsurance recoverables as assets, net of available offsets, as follows:

<TABLE>
<CAPTION>
                                                                                                   IN THOUSANDS
                                                                                            ------------------------
                                                                                                   DECEMBER 31,
                                                                                            ------------------------
                                                                                               1997          1996
                                                                                            ----------    ----------
<S>                                                                                         <C>           <C>
Reinsurance recoverable balances:
  Paid claims.............................................................................  $   10,646    $   15,457
  Unpaid claims and claims expenses.......................................................     196,836       406,128
  Ceded balances payable..................................................................     (34,305)      (38,205)
  Funds held liability....................................................................        (900)      (47,056)
                                                                                            -----------   -----------
Reinsurance recoverable balances, net.....................................................  $  172,277    $  336,324
                                                                                            -----------   -----------
Reinsurance recoverable on unearned premiums..............................................  $   31,297    $   20,320
                                                                                            -----------   -----------

</TABLE>

The Company is the beneficiary of letters of credit, trust accounts and
funds withheld in the aggregate amount of $68 million at December 31, 1997,
collateralizing reinsurance recoverables with respect to certain
retrocessionnaires.

In recognition of the Company's strong surplus position and financial
capacity, and the continued positive contribution of business written since
1986, the Company terminated two retrocessional programs effective January 1,
1997. The Company received total consideration of approximately $225 million,
representing reinsurance recoverable balances for unpaid claims and claims
expenses of approximately the same amount. As a result, at December 31, 1997,
the Company's reinsurance recoverables, exclusive of available offsets in the
form of letters of credit, trust accounts and funds withheld, were $238.8
million, with approximately 165 domestic and 147 foreign retrocessionnaires. The
Company had no amounts recoverable from a single entity or group of entities
that exceeded 5% of stockholders equity as of December 31, 1997.


                                        51

<PAGE>


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


The Company's maximum retention on any one claim for non-catastrophe 
property/casualty losses for 1998 and 1997 is generally $5 million ($10 
million in certain limited circumstances), compared to $7.5 million for 1996. 
The Company's maximum retention for surety losses for 1998 and 1997 is $4 
million per principal, compared to $12.5 million per principal for 1996. 
Further, the Company's retention level for property catastrophe claims in 1998 
remains the same as 1997 at $5 million per event compared to $15 million for 
1996. For 1998, the Company has obtained $97 million of catastrophe protection 
($65 million with respect to claims outside the U.S. and Canada). If claims 
within the U.S. and Canada exceed $60 million, the agreements provide an 
increase to the Company's net retention of up to an additional $3 million.

7. LEASE AGREEMENTS

The Company leases office space under noncancellable, and in most instances
renewable, operating leases. As a result of a recent extension, these leases
expire at various dates through 2016. The following is a schedule of future 
minimum rental payments, exclusive of escalation clauses and rental income, 
as of December 31, 1997:

<TABLE>
<CAPTION>

    YEAR                                                                              IN THOUSANDS
    --------------------------------------------------------------------------------  -------------
    <S>                                                                               <C>
    1998............................................................................   $     4,152
    1999............................................................................         4,067
    2000............................................................................         3,894
    2001............................................................................         3,059
    2002 and thereafter.............................................................        25,730
                                                                                      --------------
    Total...........................................................................   $    40,902
                                                                                      --------------

</TABLE>

Rental expense, net of sublease rental income, was approximately $4.4
million for 1997, $3.9 million for 1996 and $3.5 million for 1995.


8. LONG-TERM DEBT AND FINANCING ARRANGEMENTS

The Company's $100 million of 7.15% Senior Notes due November 15, 2005, were
issued in November 1995 through a public offering at a price of $99.9 million.
The expenses incurred in the offering of approximately $.8 million were deferred
and are being amortized over the life of the Notes. Interest and amortization
costs were $7.2 million for 1997 and 1996 and $.8 million for 1995. The fair
value of the Notes, estimated based on quoted market prices, was approximately
$102.3 million as of December 31, 1997. The Company contributed the net proceeds
of $99.1 million to NAC in 1995.

The Company's $100 million of 5.25% Convertible Subordinated Debentures due
December 15, 2002, were issued in December 1992 through a private offering. The
Debentures are callable as of January 15, 1996 and are convertible into
approximately 2 million shares of the Company's Common Stock at a conversion
price of $49.50 per share. The expenses incurred in the offering of
approximately $1.4 million were deferred and are being amortized over the life
of the Debentures. Interest and amortization costs were $5.4 million annually
for 1997, 1996 and 1995. The fair value of the Debentures, estimated based on
quoted market prices, was approximately $106.5 million as of December 31, 1997.
The Company contributed $85 million of the net proceeds of the offering to NAC
in 1992.


                                        52

<PAGE>


The Company's $100 million of 8% Senior Notes due June 15, 1999 were issued
in June 1992 through a public offering. The expenses incurred in the offering of
approximately $.8 million were deferred and are being amortized over the life of
the Notes. Interest and amortization costs were $8.1 million annually for 1997,
1996 and 1995. The fair value of the Notes, estimated based on quoted market
prices, was approximately $102.3 million as of December 31, 1997. The Company
contributed $80 million of the net proceeds of the offering to NAC in 1992.

NAC Re has a revolving credit agreement and term loan bank facility under
which it can borrow up to $35 million. A commitment fee of 3/8 of 1% per year is
paid on the unused credit line. Borrowings of $12.9 million were outstanding at
December 31, 1997 and were principally used in connection with repurchases of
the Company's Common Stock. The facility is scheduled to be reduced on a
quarterly basis beginning in July 1998. NAC has a $15 million line of credit
which is available for catastrophe claim payments or working capital purposes. A
commitment fee of 1/4 of 1% per year is paid on the unused credit line. There
were no outstanding borrowings on this facility at December 31, 1997. Interest
costs on borrowing facilities were approximately $1.0 million, $1.6 million and
$1.4 million in 1997, 1996 and 1995, respectively.

Total interest expense paid in connection with the Company's long-term debt
and financing arrangements was $21.3 million, $22 million and $14.6 million for
the years ended December 31, 1997, 1996 and 1995, respectively.


9. EMPLOYEE BENEFITS AND COMPENSATION ARRANGEMENTS

STOCK PLANS

The Company accounts for stock compensation plans in accordance with APB
Opinion No. 25, "Accounting for Stock Issued to Employees." Accordingly,
compensation expense for stock option grants and SARs is recognized to the
extent that the fair value of the stock exceeds the exercise price of the option
at the measurement date.

The Company maintains stock option plans which provide for the granting of
options and SARs to purchase shares of Common Stock to certain officers of the
Company. Under such plans, the Company had the authority to grant up to
3,569,000 options at December 31, 1997, of which 1,194,000 options related to a
plan implemented during 1997. Options and SARs have generally been granted with
a five or six-year vesting schedule. The majority of the options expire 10 years
from the date of grant; the remainder of the options have no expiration.
Outstanding SARs are generally converted by the Company to options prior to
vesting.

The Company also maintains a stock option plan for non-employee directors
that provides for automatic annual grants of options to eligible directors.
Under such plan, the Company had the authority to grant up to 375,000 options at
December 31, 1997. Options expire 10 years from the date of grant and are fully
exercisable six months after their grant date.


                                        53

<PAGE>


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Information concerning stock options (including SARs) for all of the
Company's stock option plans is as follows:

<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31,
                                               --------------------------------------------------------------------------------
                                                         1997                      1996                        1995
                                               ------------------------  ------------------------  ----------------------------
                                                NUMBER OF     AVERAGE     NUMBER OF     AVERAGE     NUMBER OF       AVERAGE 
                                                 OPTIONS     EXERCISE      OPTIONS     EXERCISE      OPTIONS        EXERCISE
                                                 (000S)        PRICE       (000S)        PRICE       (000S)          PRICE  
                                               -----------  -----------  -----------  -----------  -----------     ----------
<S>                                            <C>          <C>          <C>          <C>          <C>             <C> 
Outstanding, beginning of year...............       2,380    $   30.51        1,772    $   28.27        1,548      $   25.11
Granted......................................         307        43.12          713        35.93          412          38.02
Exercised....................................        (163)       22.33          (33)       19.79         (102)         17.97
Cancelled....................................         (62)       37.56          (72)       33.73          (86)         30.24
                                               -----------  -----------  -----------  -----------  -----------     ----------
Outstanding, end of year.....................       2,462    $   32.45        2,380    $   30.51        1,772      $   28.27
                                               -----------  -----------  -----------  -----------  -----------     ----------
Exercisable, end of year.....................       1,119    $   26.93          931    $   23.59          738      $   21.66
                                               -----------  -----------  -----------  -----------  -----------     ----------
Available for grant, end of year.............       1,077        --             139        --             784           --         
                                               -----------  -----------  -----------  -----------  -----------     ----------

</TABLE>


The following table summarizes information about the Company's stock options
(including SARs) for options outstanding as of December 31, 1997:

<TABLE>
<CAPTION>
                                                                     OPTIONS OUTSTANDING               OPTIONS EXERCISABLE
                                                           ----------------------------------------  ------------------------
                                                                                        AVERAGE
                                                           NUMBER OF     AVERAGE       REMAINING      NUMBER OF     AVERAGE
RANGE OF                                                    OPTIONS     EXERCISE      CONTRACTUAL      OPTIONS     EXERCISE
EXERCISE PRICES                                             (000S)        PRICE      LIFE (YEARS)      (000S)        PRICE
- --------------------------------------------------------  -----------  -----------  ---------------  -----------  -----------
<S>                                                       <C>          <C>          <C>              <C>          <C>
$13.61--$18.83..........................................         270    $   15.29            4.8            270    $   15.29
$21.83--$29.63..........................................         471    $   24.97            6.1            344    $   24.38
$30.13--$39.75..........................................       1,427    $   35.96            8.4            504    $   34.88
$40.38--$47.44..........................................         294    $   43.13            9.4              1    $   40.38
$13.61--$47.44..........................................       2,462    $   32.45            7.7          1,119    $   26.93

</TABLE>

The Company has an Employee Stock Purchase Plan through which all employees
have the option, subject to certain limitations, to purchase NAC Res Common
Stock, at the end of each offering period at a discounted price. The discounted
price is based on 85% of the lesser of the stocks market price at the beginning
of the period and the market price at the end of the period. During the 1997,
1996 and 1995 plan years, employees purchased approximately 46,400, 28,400 and
21,200 shares of Common Stock, respectively. The Company's stock purchase plan
qualifies as a non-compensatory plan under APB 25.

The Company has restricted stock plans, pursuant to which employees have
been granted approximately 71,100, 57,600 and 44,500 shares of Common Stock
during 1997, 1996 and 1995, respectively. Vesting for such shares generally
occurs over a five or six-year period. In 1996, the Company also granted 20,000
shares of restricted stock to an executive in connection with his employment
contract, the majority of which have vested due to the attainment of the stock
appreciation performance measures; the remainder 


                                        54

<PAGE>

of the shares vest over a five year period. The Company incurred compensation 
expense, under APB 25, for the years ended December 31, 1997, 1996 and 1995 of 
approximately $1,983,000, $974,000 and $613,000, respectively, in connection 
with restricted stock grants.

Supplemental and Pro Forma Disclosures 

In October 1995, the FASB issued SFAS No. 123, "Accounting for Stock-Based 
Compensation." This Statement, if adopted, requires companies to recognize 
compensation expense for grants of stock, stock options and other equity 
instruments to employees based on their respective fair values on the date 
of grant. Companies that choose not to adopt the new rules will continue to 
apply the existing accounting rules contained in APB No. 25, but are required 
to disclose the pro forma effects of net income and earnings per share, as if 
the fair value based method of accounting had been applied.

The following pro forma information regarding net income and earnings per
share required by Statement No. 123 has been determined as if the Company had
accounted for its employee stock plans under the fair value method described in
that Statement. The fair value of options and other awards granted under the
Company's stock-based compensation plans was estimated on the date of grant 
using a Black-Scholes option valuation model. The Black-Scholes option model 
was developed for use in estimating the fair value of traded options which 
have no vesting restrictions and are fully transferable. In addition, option 
valuation models require the input of highly subjective assumptions including 
the expected dividend yield, the expected life of the options, the expected 
stock price volatility and the risk-free interest rate.

The weighted average assumptions for the stock option grants were as
follows:

<TABLE>
<CAPTION>
                                                                            1997       1996       1995
                                                                          ---------  ---------  ---------
<S>                                                                       <C>        <C>        <C>
Expected life...........................................................  7.5 yrs    7.5 yrs    7.5 yrs
Volatility..............................................................      30%        28%        28%
Dividend yield                                                               .70%       .67%       .63%
Risk-free interest rate.................................................     6.6%       6.3%       6.3%
Grant date fair value...................................................   $19.20     $15.32     $16.24

</TABLE>

The assumptions for the stock purchase plan were as follows:


<TABLE>
<CAPTION>
                                                                           1997         1996        1995
                                                                         ---------    ---------   ---------
<S>                                                                      <C>          <C>         <C>
Expected life..........................................................    1 yr         1 yr        1 yr
Volatility.............................................................     30%          28%         28%
Dividend yield                                                             .87%         .72%        .72%
Risk-free interest rate................................................    5.3%         5.3%        5.3%
Grant date fair value..................................................  $ 9.14       $ 8.75      $ 8.69

</TABLE>


                                        55

<PAGE>


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


For purposes of pro forma disclosures, the estimated fair value of each
option is amortized to expense over the options vesting period and does not
include grants prior to January 1, 1995. As such, the pro forma net income and
earnings per share are not indicative of future years. The Company's pro forma
information is as follows:

<TABLE>
<CAPTION>
                                                                   THOUSANDS, EXCEPT PER SHARE AMOUNTS
                                                 ----------------------------------------------------------------------
                                                                         YEAR ENDED DECEMBER 31,
                                                 ----------------------------------------------------------------------
                                                          1997                    1996                    1995
                                                 ----------------------  ----------------------  ----------------------
                                                 REPORTED    PRO FORMA   REPORTED    PRO FORMA   REPORTED    PRO FORMA
                                                 ---------  -----------  ---------  -----------  ---------  -----------
<S>                                              <C>        <C>          <C>        <C>          <C>        <C>
Net income.....................................  $  95,677   $  93,047   $  70,520   $  69,111   $  62,824   $  62,322
Earnings per share* 
  Basic........................................  $    5.21   $    5.06   $    3.74   $    3.67   $    3.55   $    3.52
  Diluted......................................  $    4.77   $    4.66   $    3.51   $    3.44   $    3.30   $    3.27

</TABLE>

- ------------------------
*   Prior year data restated per SFAS No. 128.


INCENTIVE COMPENSATION PLANS

The Company maintains two incentive compensation plans. The Long-term
Incentive Plan provides for cash awards to eligible officers based on
achievement of certain corporate goals over a three-year performance cycle. The
Annual Incentive Plan for all employees (which was amended in 1996 to
incorporate a previously separate plan for non-officers) provides for annual
cash awards based on individual and corporate performance. Based on estimated
performance levels, the Company expensed $10.4 million, $8.5 million and $6.4
million for the years ended December 31, 1997, 1996 and 1995, respectively,
related to these plans.


SEVERANCE PROGRAM

The Company has severance agreements with officers and a severance program
for non-officers to provide for severance payments and continuation of benefits
in the event of employment termination resulting from a change in control. The
extent of the severance payments and when they are triggered vary depending upon
the position of the employee and, in the case of non-officers, the length of
tenure of the employee.


EMPLOYMENT CONTRACTS

The Company has employment contracts with certain officers, the terms of
which expire at various times through December 31, 2001. Such agreements provide
for minimum salary levels, incentive bonuses payable in accordance with bonus
plans and, in two contracts, supplemental retirement benefits.


RETIREMENT PLANS

The Company maintains a qualified non-contributory defined benefit pension
plan covering substantially all U.S. employees. Pension benefits generally vest
after five years of service. Benefits are based on years of service and
compensation, as defined in the plan, during the highest consecutive three years
of the employees last ten years of employment.


                                        56

<PAGE>


The Company's policy is to make annual contributions to the plan that are
deductible for federal income tax purposes and that meet the minimum funding
standards required by law. This contribution level is determined by utilizing
the entry age cost method and different actuarial assumptions than those used
for pension expense purposes.

The Company also maintains a non-qualified unfunded supplemental defined
benefit plan designed to compensate individuals to the extent their benefits
under the Company's qualified plan are curtailed due to Internal Revenue Code
limitations.

The following tables set forth the amounts recognized in the Company's
financial statements with respect to the qualified and non-qualified pension
plans.

<TABLE>
<CAPTION>
                                                                                       IN THOUSANDS
                                                         -------------------------------------------------------------------------
                                                                 DECEMBER 31, 1997                      DECEMBER 31, 1996
                                                         -----------------------------------  ------------------------------------
                                                                         NON-                                 NON- 
                                                          QUALIFIED    QUALIFIED               QUALIFIED    QUALIFIED
                                                            PLAN         PLAN        TOTAL       PLAN         PLAN        TOTAL 
                                                         -----------  -----------  ---------  -----------  -----------  ----------
<S>                                                      <C>          <C>          <C>        <C>          <C>         <C>
Actuarial present value of benefit obligations: 
  Accumulated benefit obligation:              
    Vested...............................................$   5,176    $   2,013   $   7,189   $   3,676    $   1,422    $  5,098 
    Nonvested............................................      864          126         990         769          141         910 
                                                         -----------  -----------  ---------  -----------  -----------  ---------
  Accumulated benefit obligation.........................    6,040        2,139       8,179       4,445        1,563       6,008 
  Effect of projected salary increases...................    3,947        1,988       5,935       3,174        1,330       4,504 
                                                         -----------  -----------  ---------  -----------  -----------  ---------
  Projected benefit obligation...........................    9,987        4,127      14,114       7,619        2,893      10,512 
  Plan assets at market value......................          8,442       --           8,442       6,461       --           6,461 
                                                         -----------  -----------  ---------  -----------  -----------  ---------
  Projected benefit obligation in excess of plan assets..    1,545        4,127       5,672       1,158        2,893       4,051 
  Unrecognized net gain (loss)...........................    1,944          (49)      1,895       1,866          608       2,474 
  Unrecognized net transition obligation.................      (85)      --             (85)        (96)      --             (96)
  Unrecognized net prior service costs...................      (70)        (243)       (313)        (72)        (255)       (327)
                                                         -----------  -----------  ---------  -----------  -----------  ---------
Pension liability, end of year...........................    3,334        3,835       7,169       2,856        3,246       6,102 
  Pension liability, beginning of year...................   (2,856)      (3,246)     (6,102)     (2,338)      (2,716)     (5,054)
  Company contributions..................................      679       --             679         557       --             557 
                                                         -----------  -----------  ---------  -----------  -----------  ---------
Net pension cost.........................................$   1,157    $     589   $   1,746   $   1,075    $     530    $  1,605 
                                                         -----------  -----------  ---------  -----------  -----------  ---------

</TABLE>


<TABLE>
<CAPTION>
                                                                                        IN THOUSANDS
                                                                             ----------------------------------
                                                                                 YEAR ENDED DECEMBER 31,
                                                                             ----------------------------------
                                                                               1997         1996         1995
                                                                             ---------    ---------   ---------
<S>                                                                          <C>          <C>         <C>
Net pension cost included the following components:
  Service costs--benefits earned during the year.............................$  1,333     $  1,247    $  1,111
  Interest cost on projected benefit obligations.............................     898          741         660
  Net amortization and deferral..............................................  (1,376)        (807)        751
  Actual return on plan assets...............................................     891          424      (1,076)
                                                                             ---------    ---------   ---------
  Net pension cost...........................................................$  1,746     $  1,605    $  1,446
                                                                             ---------    ---------   ---------

</TABLE>


                                        57
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
    The discount rates used in determining the actuarial present value of
benefit obligations were 6.75% and 7.25% for 1997 and 1996, respectively. The
rate of increase for future compensation levels was 5.5% and 6% for 1997 and
1996, respectively. The assumed rate of return on plan assets was 8.5% for 1997,
1996 and 1995. Assets of the qualified plan are invested principally in equity
securities and fixed maturities. Plan assets include approximately $700,000 and
$486,000 of NAC Re Common Stock as of December 31, 1997 and 1996, respectively.
 
    The Company maintains a qualified contributory defined contribution plan for
substantially all U.S. employees. Under this plan, the Company makes a matching
contribution equal to 50% of each participants eligible elective contributions,
which may be up to 6% of the participants compensation. The Company may make an
additional annual discretionary matching contribution. The Company also
maintains a non-qualified unfunded supplemental defined contribution plan
designed to compensate individuals to the extent the Company's contributions
under the qualified plan are curtailed due to Internal Revenue Code limitations.
The Company expensed $2.2 million for 1997, $2.0 million for 1996 and $1.6
million for 1995, related to these plans. Contributions to the qualified plan
are invested, at the election of the participant, in several funds, including a
NAC Re Common Stock fund. The fund held approximately 111,000 and 137,000 shares
of NAC Re Common Stock as of December 31, 1997 and 1996, respectively.
 
    The Company maintains a qualified non-contributory defined contribution plan
covering substantially all U.K. employees. Contributions under this plan are
determined on the basis of salary, age and position within the organization. The
Company also maintains an unfunded supplemental defined contribution plan
designed to compensate individuals to the extent their benefits under the
qualified plan are curtailed due to U.K. Inland Revenue limitations. The Company
incurred expenses of $563,000, $436,000 and $375,000 for the years ended
December 31, 1997, 1996 and 1995, respectively, related to these plans.
 
10. Domestic and International Financial Information 
The Company's principal business segment, for both its domestic and 
international operations, is the reinsurance of property and casualty lines 
of business, including general liability, automobile liability, aviation, 
fidelity/surety and commercial and personal property. The Company's domestic 
operation includes business written in the United States and Canada. 
International property and casualty reinsurance is conducted through a 
wholly-owned subsidiary, NAC Re International Holdings Limited, which 
established a fully licensed property and casualty reinsurance subsidiary, 
NAC Reinsurance International Limited, located in London, England in December 
1993. The subsidiary was initially capitalized with L50 million, or 
approximately $75 million, and, subsequent to contributions by the Company in 
1994 and 1995, its statutory surplus level was approximately L83.3 million or 
$139.4 million at December 31, 1997. During 1997, NAC Re International 
Holdings Limited formed a subsidiary, Stonebridge Underwriting, Ltd, which is 
participating as a corporate capital vehicle on a Lloyds syndicate commencing 
with underwriting year 1998. See Subsequent Event Note 15 for further details.
 
                                       58
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
    The following is a summary of financial information related to the Company's
domestic and international operations:
 
<TABLE>
<CAPTION>
                                                                                         IN THOUSANDS
                                                                          ------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31, 1997
                                                                          ------------------------------------------
                                                                         DOMESTIC       INTERNATIONAL      TOTAL
                                                                       ------------     -------------  -------------
<S>                                                                    <C>              <C>           <C>
Net premiums written.................................................  $    541,362(1)   $   52,294   $      593,656
                                                                       ------------     ------------  --------------
Premiums earned......................................................       523,631          51,016          574,647
Net investment income................................................       109,087          13,963          123,050
Net investment gains.................................................        37,556           5,119           42,675
                                                                       ------------     ------------  --------------
   Total revenues....................................................       670,274          70,098          740,372
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Claims and claims expense............................................       344,308          35,187          379,495
Commissions and brokerage............................................       140,862          10,290          151,152
Other operating expenses.............................................        55,871           9,289           65,160
Interest expense.....................................................        21,735            --             21,735
                                                                       ------------     ------------  --------------
   Total expenses....................................................       562,776          54,766          617,542
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Pretax operating income..............................................       107,498          15,332          122,830
                                                                       ------------     ------------  --------------
Net income...........................................................  $     85,626      $   10,051   $       95,677
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Identifiable assets..................................................  $  2,870,280      $  277,219   $    2,984,865(2)
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Statutory composite ratio............................................         103.1%          108.9%           103.6%
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
</TABLE>
 
- ------------------------
(1) Includes approximately $5.8 million of business assumed from our
    international subsidiary.
(2) The total is net of intercompany transactions of $162.6 million.
 
 
<TABLE>
<CAPTION>
                                                                                         IN THOUSANDS
                                                                          ------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31, 1996
                                                                          ------------------------------------------
                                                                         DOMESTIC       INTERNATIONAL     TOTAL
                                                                       ------------     ------------- --------------
<S>                                                                    <C>              <C>           <C>
Net premiums written.................................................  $    521,876(1)   $   52,128   $      574,004
                                                                       ------------     ------------  --------------
Premiums earned......................................................       476,012          50,330          526,342
Net investment income................................................        93,206          11,124          104,330
Net investment gains (losses)........................................        19,603             (34)          19,569
                                                                       ------------     ------------  --------------
Total revenues.......................................................       588,821          61,420          650,241
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Claims and claims expense............................................       302,535          36,418          338,953
Commissions and brokerage............................................       133,423           9,901          143,324
Other operating expenses.............................................        49,019           7,587           56,606
Interest expense.....................................................        22,322            --             22,322
                                                                       ------------     ------------  --------------
  Total expenses.....................................................       507,299          53,906          561,205
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Pretax operating income..............................................        81,522           7,514           89,036
                                                                       ------------     ------------  --------------
Net income...........................................................  $     65,566      $    4,954   $       70,520
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Identifiable assets..................................................  $  2,640,727      $  252,043   $    2,745,631(2)
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
Statutory composite ratio............................................         101.1%          105.6%           101.6%
                                                                       ------------     ------------  --------------
                                                                       ------------     ------------  --------------
</TABLE>
 
- ------------------------
(1) Includes approximately $3.0 million of business assumed from our
    international subsidiary.
(2) The total is net of intercompany transactions of $147.1 million.
 
                                       59
<PAGE>
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                         IN THOUSANDS
                                                                       ---------------------------------------------
                                                                                 YEAR ENDED DECEMBER 31, 1995
                                                                       ---------------------------------------------
                                                                         DOMESTIC       INTERNATIONAL     TOTAL
                                                                       ------------     ------------- --------------
<S>                                                                    <C>              <C>           <C>
Net premiums written.................................................  $    476,048(1)     $   45,441   $      521,489
                                                                       ------------     -----------   --------------
Premiums earned......................................................       452,994          38,791          491,785
Net investment income................................................        81,583           7,725           89,308
Net investment gains.................................................        24,063           1,328           25,391
                                                                       ------------     -----------   --------------
  Total revenues.....................................................       558,640          47,844          606,484
                                                                       ------------     -----------   --------------
                                                                       ------------     -----------   --------------
Claims and claims expense............................................       295,038          31,110          326,148
Commissions and brokerage............................................       132,049           7,014          139,063
Other operating expenses.............................................        40,760           6,044           46,804
Interest expense.....................................................        15,648            --             15,648
                                                                       ------------     -----------   --------------
  Total expenses.....................................................       483,495          44,168          527,663
                                                                       ------------     -----------   --------------
                                                                       ------------     -----------   --------------
Pretax operating income..............................................        75,145           3,676           78,821
                                                                       ------------     -----------   --------------
Net income...........................................................  $     60,449      $    2,375   $       62,824
                                                                       ------------     -----------   --------------
                                                                       ------------     -----------   --------------
Identifiable assets..................................................  $  2,405,051      $  180,060   $    2,462,131(2)
                                                                       ------------     -----------   --------------
                                                                       ------------     -----------   --------------
Statutory composite ratio............................................         103.1%          111.7%           103.7%
                                                                       ------------     -----------   --------------
                                                                       ------------     -----------   --------------
</TABLE>
 
- ------------------------
(1) Includes approximately $2.1 million of business assumed from our
    international subsidiary.
(2) The total is net of intercompany transactions of $123 million.
 
    During 1997, three reinsurance brokers, AON Reinsurance Agency, Guy 
Carpenter and Company, Inc., and E.W. Blanch, Inc., generated 24%, 17% and 
11%, respectively, of the Company's premiums assumed from client companies. 
These same reinsurance brokers generated 23%, 13% and 8%, respectively, 
during 1996, and 16%, 16% and 9%, respectively, during 1995, of the Company's 
assumed premiums. The Company does not believe that the reduction of business 
assumed from any one client or broker will have a materially adverse effect 
on the Company due to its competitive position in the marketplace and the 
continuing availability of other sources of business.
 
11. Statutory Financial Information 

Consolidated statutory net income and surplus of NAC, as reported to the 
insurance regulatory authorities, differs in certain respects from the 
amounts as prepared in accordance with generally accepted accounting 
principles (GAAP). The following schedules identify the significant 
reconciling differences:
 
<TABLE>
<CAPTION>
                                                                                             IN THOUSANDS
                                                                                   -------------------------------
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
                                                                                     1997       1996       1995
                                                                                   ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Net Income:
Domestic statutory net income....................................................  $  70,292  $  59,827  $  57,670
Domestic GAAP adjustments:
  Deferred acquisition costs.....................................................      6,703     14,211      9,128
  Deferred income taxes..........................................................     23,257      4,421      3,204
  Other, net.....................................................................       (560)       401     (1,074)
                                                                                   ---------  ---------  ---------
  Domestic GAAP net income.......................................................     99,692     78,860     68,928
International operation..........................................................     10,051      4,954      2,375
Parent company operations........................................................    (14,066)   (13,294)    (8,479)
                                                                                   ---------  ---------  ---------
Consolidated GAAP net income.....................................................  $  95,677  $  70,520  $  62,824
                                                                                   ---------  ---------  ---------
</TABLE>

                                       60

<PAGE>

<TABLE>
<CAPTION>
                                                                                          IN THOUSANDS
                                                                               ----------------------------------
                                                                                    YEAR ENDED DECEMBER 31,
                                                                               ----------------------------------
                                                                                  1997        1996        1995
                                                                               ----------  ----------  ----------
<S>                                                                            <C>         <C>         <C>
Stockholders Equity:
Consolidated statutory surplus...............................................  $  702,222  $  663,867  $  615,433
Consolidated GAAP adjustments:
  Deferred acquisition costs.................................................      92,709      85,211      70,466
  Deferred income tax asset, net.............................................      41,795      29,599      27,492
  Excess of cost over net assets acquired....................................       3,276       3,644       4,011
  Unrealized appreciation of investments.....................................      71,846      25,537      46,783
  Unauthorized/authorized reinsurance charges................................      15,452      12,730       6,814
  Other, net.................................................................       6,824       4,695       4,101
                                                                               ----------  ----------  ----------
Investment in insurance subsidiaries, GAAP...................................     934,124     825,283     775,100
Parent company:
  Other net assets...........................................................      22,879      27,920      36,583
  Long-term debt.............................................................    (299,942)   (299,934)   (299,927)
                                                                               ----------  ----------  ----------
Consolidated stockholders equity, GAAP.......................................  $  657,061  $  553,269  $  511,756
                                                                               ----------  ----------  ----------
                                                                               ----------  ----------  ----------
</TABLE>
 
    Under the holding company structure, NAC Re is dependent upon the ability of
its principal operating subsidiary, NAC, for the transfer of funds principally
in the form of cash dividends and tax reimbursements. Such transactions,
including the payment of cash dividends, are subject to restrictions imposed by
New York insurance law. Generally, NAC may pay cash dividends only out of its
statutory earned surplus which was $190.8 million at December 31, 1997. However,
the maximum amount of dividends that may be paid in any twelve-month period
without the prior approval of the New York Insurance Department is the lesser of
net investment income or 10% of statutory surplus as such terms are defined in
the New York insurance law. The maximum amount of cash dividends that NAC could
pay without such regulatory approval, based on 10% of statutory surplus as of
December 31, 1997, is approximately $70.2 million. During 1997, 1996 and 1995,
NAC declared dividends of $22.5 million, $38 million and $7.5 million,
respectively, to NAC Re.
 
    In 1993, the National Association of Insurance Commissioners (the 
"NAIC"), by adopting a model risk-based capital act, intended to provide an 
additional tool for regulators to evaluate the capital of property and 
casualty insurers and reinsurers with respect to the risks assumed by them 
and to determine whether there is a perceived need for corrective action. The 
nature of the corrective action depends upon the extent of the calculated 
risk-based capital deficiency and ranges from requiring the company to submit 
a comprehensive plan to placing the insurer under regulatory control. While 
the model risk-based capital act has not yet been adopted in New York, NACs 
domicile, New York has issued a circular letter requiring the filing of 
risk-based capital reports by property and casualty insurers and reinsurers. 
The NAIC also adopted a proposal that requires property and casualty insurers 
and reinsurers to report the results of their risk-based capital calculations 
as part of the statutory annual statements filed with state regulatory 
authorities. Surplus (as calculated for statutory annual statement purposes) 
for each of the Company's domestic subsidiaries is well above the risk-based 
capital thresholds that would require either company or regulatory action.
 
                                       61
<PAGE>
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
12. EARNINGS PER SHARE
 
    The following table sets forth the computation of basic and diluted earnings
per share:
 
<TABLE>
<CAPTION>
                                                                                            IN THOUSANDS
                                                                                   -------------------------------
                                                                                       YEAR ENDED DECEMBER 31,
                                                                                   -------------------------------
                                                                                            IN THOUSANDS
                                                                                     1997       1996       1995
                                                                                   ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Basic Earnings Per Share:
  Net income.....................................................................  $  95,677  $  70,520  $  62,824
  Weighted average shares........................................................     18,378     18,855     17,709
  Basic earnings per share.......................................................  $    5.21  $    3.74  $    3.55
                                                                                   ---------  ---------  ---------
Diluted Earnings Per Share:
  Net income.....................................................................  $  95,677  $  70,520  $  62,824
  Add back after tax interest on convertible debentures..........................      3,504      3,504      3,504
                                                                                   ---------  ---------  ---------
  Adjusted net income............................................................  $  99,181  $  74,024  $  66,328

  Weighted average shares........................................................     18,378     18,855     17,709
  Assumed exercise of dilutive stock options (1).................................        411        240        386
  Assumed conversion of convertible debentures (2)...............................      2,020      2,020      2,020
                                                                                   ---------  ---------  ---------
  Weighted average shares and dilutive securities................................     20,809     21,115     20,115
  Diluted earnings per share.....................................................  $    4.77  $    3.51  $    3.30
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
</TABLE>
 
- ------------------------
(1) Computed utilizing the average market price of the Common Stock for the
    period.
(2) Reflects the assumed conversion of the Company's 5.25% Convertible
    Subordinated Debentures due 2002.
 
13. CAPITAL STOCK
 
Changes in Common Stock outstanding were as follows:
 
<TABLE>
<CAPTION>
                                                                                  YEAR ENDED DECEMBER 31,
                                                                          ----------------------------------------
                                                                              1997          1996          1995
                                                                          ------------  ------------  ------------
<S>                                                                       <C>           <C>           <C>
Common Stock:
  Balance, beginning of year............................................    21,463,982    21,341,053    19,638,865
  Shares issued.........................................................       243,241       122,929     1,702,188
                                                                          ------------  ------------  ------------
Balance, end of year....................................................    21,707,223    21,463,982    21,341,053
                                                                            ------------  ------------  ------------
                                                                          ------------  ------------  ------------
Treasury Stock:
  Balance, beginning of year............................................     3,060,543     2,137,501     2,131,633
  Purchases.............................................................       345,375       943,042         5,868
  Shares reissued.......................................................        (7,432)      (20,000)        --
                                                                          ------------  ------------  ------------
  Balance, end of year..................................................     3,398,486     3,060,543     2,137,501
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
Total Common Stock outstanding..........................................    18,308,737    18,403,439    19,203,552
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
</TABLE>
 
                                      62
<PAGE>

 
13. CAPITAL STOCK (CONTINUED)

EQUITY OFFERING
 The Company issued 1,530,000 shares of Common Stock through a secondary
public offering in November 1995. Approximately $47.5 million of the net
proceeds was contributed to the statutory surplus of NAC.
 
STOCK REPURCHASE
The Company maintains a stock repurchase program pursuant to which the Board
of Directors has authorized the repurchase of approximately 4,082,000 shares of
Common Stock. Since January 1, 1997, the Company repurchased approximately
345,000 shares of Common Stock, at an average cost of $42.05 per share. From its
inception in 1988 through December 31, 1997, approximately 3,426,000 shares were
repurchased at a cost of approximately $88.5 million or an average price of
$25.82 per share. As of December 31, 1997, approximately 656,000 shares remain
authorized for repurchase under the program.
 
RIGHTS PLAN
In June 1988, the Company declared a dividend of one Preferred Stock
Purchase Right (a "Right") for each outstanding share of NAC Re Common Stock.
Pursuant to the related Rights Plan, as amended in 1990, the Rights will become
exercisable only in the event, with certain exceptions, a person or group
becomes the beneficial owner of 15% or more of NAC Re voting stock. The Rights
Plan provides, however, that the Rights will not become exercisable due to the
beneficial ownership by The Equitable Life Assurance Society of the United
States and its affiliates of up to 28.5% of such stock. Each Right currently
entitles the holder to purchase from the Company, for a price of $37.78 (the
"Exercise Price"), 1/225 of a share of Series A Junior Participating Preferred
Stock (the "Series A Stock") or that number of shares of Series A Stock having a
market value equal to two times the Exercise Price.
 
In addition, upon the occurrence of certain events, holders of the Rights
will be entitled to purchase the shares of Series A Stock or shares in an
acquiring entity, whichever is applicable, having a market value of two times
the Exercise Price.
 
NAC Re will generally be entitled to redeem the Rights at $.0222 per Right
following a public announcement that a person or group has become the beneficial
owner of 15% of the NAC Re voting stock. The Rights will expire on June 21,
1998.
 
At December 31, 1997, there were 18,308,737 Rights outstanding which, if
exercised, would result in the issuance of approximately 81,400 shares of Series
A Stock.
 
 
                                       63
<PAGE>
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
14. Quarterly Financial Information (Unaudited)
The following is a summary of quarterly financial data, in thousands, except
per share data and stock prices:
 
<TABLE>
<CAPTION>
                                                                   THREE MONTHS ENDED
                             ----------------------------------------------------------------------------------------------
                                  DECEMBER 31,           SEPTEMBER 30,              JUNE 30,               MARCH 31,
                             ----------------------  ----------------------  ----------------------  ----------------------
                                1997        1996        1997        1996        1997        1996        1997        1996
                             ----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------
<S>                          <C>         <C>         <C>         <C>         <C>         <C>         <C>         <C>
Income Statement Data:
Gross premiums written.....  $  186,806  $  197,964  $  188,002  $  183,052  $  180,518  $  172,718  $  168,542  $  160,346
Net premiums written.......     155,174     159,332     153,657     150,681     148,654     140,852     136,171     123,139
Premiums earned............     152,575     140,060     147,884     139,115     142,078     130,346     132,110     116,821
Net investment income......      32,253      26,831      31,917      26,140      30,308      25,616      28,572      25,743
Net investment gains.......      14,217       4,915       5,641       2,122      17,684       2,715       5,133       9,817
Operating costs and
  expenses.................     164,012     149,668     159,901     147,432     152,561     138,676     141,068     125,429
Operating income/net
  income...................      26,571      17,296      20,670      16,038      28,582      16,414      19,854      20,772
                             ----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------
Per Share Data:
Basic:*
  Operating/net income.....  $     1.45  $      .93  $     1.13  $      .86  $     1.56  $      .87  $     1.08  $     1.08
Diluted:*
  Operating/net income.....        1.32         .87        1.03         .80        1.42         .81        1.00        1.00
Stockholders equity per
  share....................       35.89       30.06       34.15       28.18       32.30       26.96       29.96       26.54
Cash dividends declared per
  share                            .075         .06        .075         .06        .075         .06         .06         .05
                             ----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------
Stock Prices:
High.......................  $    52.88  $    37.63  $    51.56  $    40.63  $    49.00  $    33.88  $    39.88  $    36.25
Low........................       43.50       32.63       45.50       30.25       35.50       28.50       33.25       31.75
Close......................       48.81       33.88       51.38       36.00       48.38       33.50       35.63       32.63
                             ----------  ----------  ----------  ----------  ----------  ----------  ----------  ----------
</TABLE>
 
- ------------------------
*   The 1996 and first three quarters of 1997 earnings per share amounts have
    been restated to comply with SFAS No. 128.
 
15. Subsequent Event 
On January 22, 1998, the Company announced an agreement in principle to 
acquire the managing agency assets of a Lloyds agency currently managing 
non-marine Syndicate 990 (Denham). Denham underwrites a specialized book of 
business on both a direct and reinsurance basis, concentrating on long-tail 
casualty lines and non-marine physical damage. In late 1997, the Company 
formed a subsidiary, Stonebridge Underwriting Ltd., which is participating as 
a corporate capital vehicle on the Denham Syndicate commencing with 
underwriting year 1998.
 
    The acquisition is subject to the completion of due diligence and regulatory
approval and is expected to close during the second quarter of 1998; however,
there are no assurances that the acquisition will be consummated. The
transaction is not expected to have a material impact on the financial condition
or results of operations of the Company in 1998.
 
                                      64


<PAGE>

                                                                     Exhibit 21


                                       
                          SUBSIDIARIES OF NAC Re CORP.


<TABLE>
<CAPTION>

                                                                 Jurisdiction
Name                                                           of Incorporation
- ----                                                           ----------------
<S>                                                            <C>

NAC Reinsurance Corporation                                      New York

 -  Greenwich Insurance Company                                  California

 -  Indian Harbor Insurance Company                              North Dakota

 -  NAC Re International Holdings Limited                        United Kingdom

    -- NAC Re International Services
       Company Limited                                           United Kingdom

    -- NAC Reinsurance International Limited                     United Kingdom

    -- Stonebridge Underwriting, Ltd.                            United Kingdom

NAC Re Financial Services, Inc.                                  Delaware

</TABLE>

                                                           

<PAGE>

                                                                      EXHIBIT 23
                                          
                                          
                          CONSENT OF INDEPENDENT AUDITORS



We consent to the incorporation by reference in the Registration Statements
(Form S-8 No. 33-25585 and Form S-8 No. 33-77494) pertaining to the NAC Re Corp.
Employee Stock Purchase Plan, in the Registration Statement (Form S-8 No.
33-27745) pertaining to the NAC Re Corp. 1989 Stock Option Plan, in the
Registration Statement (Form S-8 No. 7813) pertaining to the NAC Re Corp. 1985
and 1986 Stock Option Plans, in the Registration Statements (Form S-8 No.
33-22841 and Form S-8 No. 333-03935) pertaining to the NAC Re Corp. Employee
Savings Plan, in the Registration Statement (Form S-8 No. 33-34516) pertaining
to the NAC Re Corp. Director's Stock Option Plan, in the Registration Statement
(Form S-8 No. 33-77492) pertaining to the NAC Re Corp. Director's Stock Option
Plan, and in the Registration Statement (Form S-8 No. 33-77114) pertaining to
the NAC Re Corp. 1993 Stock Option Plan of our report dated February 4, 1998,
with respect to the consolidated financial statements and schedules of NAC Re
Corporation and subsidiaries included and/or incorporated by reference in the
Annual Report (Form 10-K) for the year ended December 31, 1997.










New York, New York                                             ERNST & YOUNG LLP
March 20, 1998


<PAGE>

                                                                 EXHIBIT 24

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Ronald L. Bornhuetter 
                                          ------------------------ 
                                          Ronald L. Bornhuetter
                                          Director


Dated:  March 11, 1998
 

<PAGE>


                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Martha G. Bannerman and Celia R. Brown and each and any one of
them, his true and lawful attorney-in-fact and agent, for him and in his
name, place and stead, to sign the name of the undersigned in the Report of
NAC Re Corp. on Form 10-K for 1997 and any and all amendments thereto, and
to file the same, with all 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 in connection therewith, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming
all that said attorneys-in-fact and agents, or any one of them, may do or
cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Nicholas M. Brown, Jr.
                                          -------------------------
                                          Nicholas M. Brown, Jr.
                                          Director


Dated:  March 11, 1998
 

<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr. Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Robert A. Belfer
                                          -------------------------
                                          Robert A. Belfer
                                          Director

Dated:  March 11, 1998
 

<PAGE>


                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/John P. Birkelund
                                          -------------------------
                                          John P. Birkelund
                                          Director


Dated:  March 11, 1998

 

<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/C. W. Carson, Jr.
                                          -------------------------
                                          C. W. Carson, Jr.
                                          Director


Dated:  March 11, 1998
 


<PAGE>


                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Dan Ciampa
                                          -------------------------
                                          Dan Ciampa
                                          Director


Dated:  March 11, 1998



<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Todd G. Cole
                                          -------------------------
                                          Todd G. Cole
                                          Director


Dated:  March 11, 1998

<PAGE> 


                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman, and Celia R.
Brown and each and any one of them, his true and lawful attorney-in-fact
and agent, for him and in his name, place and stead, to sign the name of
the undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any
and all amendments thereto, and to file the same, with all 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 in connection therewith,
as fully to all intents and purposes as he might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents,
or any of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Michael G. Fitt
                                          -------------------------
                                          Michael G. Fitt
                                          Director


Dated:  March 11, 1998

 

<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Daniel J. McNamara
                                          -------------------------
                                          Daniel J. McNamara
                                          Director


Dated:  March 11, 1998

 

<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Stephen Robert
                                          -------------------------
                                          Stephen Robert
                                          Director


Dated:  March 11, 1998

 

<PAGE>



                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Nicholas M. Brown, Jr., Martha G. Bannerman and Celia R. Brown
and each and any one of them, his true and lawful attorney-in-fact and
agent, for him and in his name, place and stead, to sign the name of the
undersigned in the Report of NAC Re Corp. on Form 10-K for 1997 and any and
all amendments thereto, and to file the same, with all 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 in connection therewith, as
fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any
one of them, may do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has hereto set his hand.



                                          /s/Herbert S. Winokur, Jr.
                                          -------------------------
                                          Herbert S. Winokur, Jr.
                                          Director


Dated:  March 11, 1998


<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<DEBT-HELD-FOR-SALE>                        $2,088,588
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                     142,527
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                               2,339,604
<CASH>                                           8,430
<RECOVER-REINSURE>                              10,646
<DEFERRED-ACQUISITION>                          92,709
<TOTAL-ASSETS>                               2,984,865
<POLICY-LOSSES>                              1,603,972
<UNEARNED-PREMIUMS>                            301,711
<POLICY-OTHER>                                  11,380
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                                299,942
                                0
                                          0
<COMMON>                                         2,171
<OTHER-SE>                                     654,890
<TOTAL-LIABILITY-AND-EQUITY>                 2,984,865
                                     574,647
<INVESTMENT-INCOME>                            123,050
<INVESTMENT-GAINS>                              42,675
<OTHER-INCOME>                                       0
<BENEFITS>                                     379,495
<UNDERWRITING-AMORTIZATION>                    216,312
<UNDERWRITING-OTHER>                            21,735
<INCOME-PRETAX>                                122,830
<INCOME-TAX>                                    27,153
<INCOME-CONTINUING>                             95,677
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    95,677
<EPS-PRIMARY>                                     5.21
<EPS-DILUTED>                                     4.77
<RESERVE-OPEN>                               1,513,345
<PROVISION-CURRENT>                            418,091
<PROVISION-PRIOR>                             (38,596)
<PAYMENTS-CURRENT>                              52,370
<PAYMENTS-PRIOR>                                26,548
<RESERVE-CLOSE>                              1,603,972
<CUMULATIVE-DEFICIENCY>                              0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<RESTATED>
       
<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   12-MOS                   12-MOS                   3-MOS                   6-MOS
9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             MAR-31-1996             JUN-30-1996
             SEP-30-1996
<PERIOD-END>                               DEC-31-1995             DEC-31-1996             MAR-31-1996             JUN-30-1996
             SEP-30-1996
<DEBT-HELD-FOR-SALE>                         1,593,543               1,703,537               1,600,344               1,605,320
               1,658,278
<DEBT-CARRYING-VALUE>                                0                       0                       0                       0
                       0
<DEBT-MARKET-VALUE>                                  0                       0                       0                       0
                       0
<EQUITIES>                                     127,257                 179,619                 124,307                 138,548
                 152,419
<MORTGAGE>                                           0                       0                       0                       0
                       0
<REAL-ESTATE>                                        0                       0                       0                       0
                       0
<TOTAL-INVEST>                               1,853,206               1,985,049               1,858,566               1,857,415
               1,922,352
<CASH>                                          10,320                  18,853                  20,446                  15,306
                   7,668
<RECOVER-REINSURE>                              19,051                  15,457                  17,374                  18,952
                  13,567
<DEFERRED-ACQUISITION>                          70,466                  85,211                  72,308                  75,856
                  79,399
<TOTAL-ASSETS>                               2,462,131               2,745,631               2,536,678               2,573,793
               2,662,154
<POLICY-LOSSES>                              1,292,415               1,513,345               1,328,438               1,382,739
               1,443,686
<UNEARNED-PREMIUMS>                            230,738                 271,898                 235,828                 242,978
                 251,774
<POLICY-OTHER>                                   5,262                   8,271                  11,579                  11,903
                   5,819
<POLICY-HOLDER-FUNDS>                                0                       0                       0                       0
                       0
<NOTES-PAYABLE>                                299,927                 299,934                 299,929                 299,930
                 299,932
                                0                       0                       0                       0
                       0
                                          0                       0                       0                       0
                       0
<COMMON>                                         2,134                   2,146                   2,139                   2,142
                   2,145
<OTHER-SE>                                     509,822                 551,123                 506,460                 503,404
                 526,253
<TOTAL-LIABILITY-AND-EQUITY>                 2,462,131               2,745,631               2,536,578               2,573,793
               2,662,154
                                     491,785                 526,342                 116,821                 247,167
                 386,282
<INVESTMENT-INCOME>                             89,308                 104,330                  25,743                  51,359
                  77,499
<INVESTMENT-GAINS>                              25,391                  19,569                   9,817                  12,532
                  14,654
<OTHER-INCOME>                                       0                       0                       0                       0
                       0
<BENEFITS>                                     326,148                 338,953                  73,689                 158,214
                 248,710
<UNDERWRITING-AMORTIZATION>                    185,867                 199,930                  46,169                  94,700
                 145,931
<UNDERWRITING-OTHER>                            15,648                  22,322                   5,571                  11,191
                  16,896
<INCOME-PRETAX>                                 78,821                  89,036                  26,952                  46,953
                  66,898
<INCOME-TAX>                                    15,997                  18,516                   6,180                   9,767
                  13,674
<INCOME-CONTINUING>                             62,824                  70,520                  20,772                  37,186
                  53,224
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                    62,824                  70,520                  20,772                  37,186
                  53,224
<EPS-PRIMARY>                                     3.55                    3.74                    1.08                    1.95
                    2.81
<EPS-DILUTED>                                     3.30                    3.51                    1.00                    1.82
                    2.62
<RESERVE-OPEN>                               1,086,170               1,292,415                       0                       0
                       0
<PROVISION-CURRENT>                            345,783                 372,294                       0                       0
                       0
<PROVISION-PRIOR>                             (19,635)                (33,341)                       0                       0
                       0
<PAYMENTS-CURRENT>                              40,123                  44,025                       0                       0
                       0
<PAYMENTS-PRIOR>                               140,263                 146,399                       0                       0
                       0
<RESERVE-CLOSE>                              1,292,415               1,513,345                       0                       0
                       0
<CUMULATIVE-DEFICIENCY>                              0                       0                       0                       0
                       0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<RESTATED>
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-30-1997             DEC-30-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<DEBT-HELD-FOR-SALE>                         1,764,015               1,998,929               2,034,211
<DEBT-CARRYING-VALUE>                                0                       0                       0
<DEBT-MARKET-VALUE>                                  0                       0                       0
<EQUITIES>                                     183,889                 136,158                 144,813
<MORTGAGE>                                           0                       0                       0
<REAL-ESTATE>                                        0                       0                       0
<TOTAL-INVEST>                               2,139,044               2,193,460               2,307,738
<CASH>                                          30,535                  18,581                  13,370
<RECOVER-REINSURE>                              10,407                  13,183                   9,677
<DEFERRED-ACQUISITION>                          87,150                  89,228                  91,389
<TOTAL-ASSETS>                               2,808,484               2,886,189               2,986,719
<POLICY-LOSSES>                              1,537,772               1,567,771               1,599,482
<UNEARNED-PREMIUMS>                            277,838                 287,748                 295,408
<POLICY-OTHER>                                  14,051                  19,470                  23,124
<POLICY-HOLDER-FUNDS>                                0                       0                       0
<NOTES-PAYABLE>                                299,938                 299,938                 299,940
                                0                       0                       0
                                          0                       0                       0
<COMMON>                                         2,155                   2,161                   2,168
<OTHER-SE>                                     548,845                 593,022                 625,358
<TOTAL-LIABILITY-AND-EQUITY>                 2,808,484               2,886,189               2,986,719
                                     132,110                 274,188                 422,072
<INVESTMENT-INCOME>                             28,572                  58,880                  90,797
<INVESTMENT-GAINS>                               5,133                  22,817                  28,458
<OTHER-INCOME>                                       0                       0                       0
<BENEFITS>                                      87,531                 181,084                 276,388
<UNDERWRITING-AMORTIZATION>                     48,063                 101,663                 158,834
<UNDERWRITING-OTHER>                             5,474                  10,882                  16,308
<INCOME-PRETAX>                                 24,747                  62,256                  87,797
<INCOME-TAX>                                     4,893                  13,820                  18,691
<INCOME-CONTINUING>                             19,854                  48,436                  69,106
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    19,854                  48,436                  69,106
<EPS-PRIMARY>                                     1.08                    2.83                    3.76
<EPS-DILUTED>                                     1.00                    2.42                    3.45
<RESERVE-OPEN>                                       0                       0                       0
<PROVISION-CURRENT>                                  0                       0                       0
<PROVISION-PRIOR>                                    0                       0                       0
<PAYMENTS-CURRENT>                                   0                       0                       0
<PAYMENTS-PRIOR>                                     0                       0                       0
<RESERVE-CLOSE>                                      0                       0                       0
<CUMULATIVE-DEFICIENCY>                              0                       0                       0
        


</TABLE>


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