AON CORP
10-Q, 1997-11-14
ACCIDENT & HEALTH INSURANCE
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q

            X    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
           ---                             -
                   OF THE SECURITIES AND EXCHANGE ACT OF 1934

                FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1997

                                       OR

                TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
           ---       OF THE SECURITIES EXCHANGE ACT OF 1934

                          Commission file number 1-7933

                                  Aon Corporation
                                  ---------------
             (Exact Name of Registrant as Specified in its Charter)

               DELAWARE                                   36-3051915
               --------                                   ----------
    (State or Other Jurisdiction of                   (IRS Employer
     Incorporation or Organization)                    Identification No.)



123 N. WACKER DR, CHICAGO, ILLINOIS                         60606
- -----------------------------------                         -----
(Address of Principal Executive Offices)                  (Zip Code)

         (312) 701-3000
         --------------
 (Registrant's Telephone Number)


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  and 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 
                                              ---    ---

Number of shares of common stock outstanding:

                                                         No. Outstanding
             Class                                        as of 9-30-97
             -----                                        -------------  

     $1.00 par value Common                                167,708,594




<PAGE>
<TABLE>
<CAPTION>
                                     Part 1
                              Financial Information
                                 Aon CORPORATION
             Condensed Consolidated Statements of Financial Position


                        (millions)                                   As of          As of
Assets                                                          Sept. 30, 1997   Dec. 31, 1996
                                                                --------------  --------------
                                                                  (Unaudited)
<S>                                                             <C>             <C>           
Investments
 Fixed maturities - available for sale                          $      3,027.4  $      2,826.1
 Equity securities at fair value
  Common stocks                                                          489.1           393.8
  Preferred stocks                                                       368.9           485.3
 Mortgage loans on real estate                                            22.2            29.0
 Real estate (net of accumulated depreciation)                            11.8            17.8
 Policy loans                                                             57.9            58.2
 Other long-term investments                                             150.3           136.2
 Short-term investments                                                1,399.0         1,266.3
                                                                --------------  --------------
   Total investments                                                   5,526.6         5,212.8


Cash                                                                   1,404.4           410.1

Receivables
 Insurance brokerage and consulting
  services                                                             4,511.6         3,565.9
 Premiums and other                                                    1,124.6           989.3
 Accrued investment income                                                70.7            69.2
                                                                --------------  --------------
   Total receivables                                                   5,706.9         4,624.4


Deferred Policy Acquisition Costs                                        560.2           598.8
Intangible Assets                                                      2,802.7         1,597.7
Property and Equipment at Cost (net of                                   443.9           323.2
 accumulated depreciation)
Assets Held Under Special Contracts                                       85.3            87.3
Other Assets                                                           1,302.1           868.4

                                                                --------------  --------------
   Total Assets                                                 $     17,832.1  $     13,722.7
                                                                ==============  ==============


Liabilities and Equity

Policy Liabilities
 Future policy benefits                                         $      1,083.3  $      1,079.4
 Policy and contract claims                                              834.4           840.9
 Unearned and advance premiums                                         2,015.1         1,925.2
 Other policyholder funds                                                694.8           514.1
                                                                --------------  --------------
   Total policy liabilities                                            4,627.6         4,359.6

General Liabilities
 Insurance premiums payable                                            5,772.6         4,143.7
 Commissions and general expenses                                      1,141.0           776.8
 Short-term borrowings                                                   592.6           213.4
 Notes payable                                                           646.0           475.1
 Debt guarantee of ESOP                                                   33.1            46.1
 Liabilities held under special contracts                                 85.3            87.3
 Other liabilities                                                     1,163.4           737.8
                                                                --------------  --------------
   Total Liabilities                                                  14,061.6        10,839.8

Commitments and Contingent Liabilities

Redeemable Preferred Stock                                                50.0            50.0

Company-obligated Mandatorily Redeemable
 Preferred Capital Securities of Subsidiary
 Trust holding solely the Company's Junior
 Subordinated Debentures                                                 800.0              --

Stockholders' Equity
 Preferred stock - $1 par value                                            5.5             5.5
 Common stock - $1 par value                                             171.5           114.1
 Paid-in additional capital                                              490.8           475.4
 Net unrealized investment gains                                         223.8           153.1
 Net foreign exchange gains/(losses)                                     (57.8)            1.0
 Retained earnings                                                     2,364.6         2,356.8
 Less - Treasury stock at cost                                           (97.8)         (121.5)
         Deferred compensation                                          (180.1)         (151.5)
                                                                --------------  --------------
   Total Stockholders' Equity                                          2,920.5         2,832.9

                                                                --------------  --------------
   Total Liabilities and Equity                                 $     17,832.1  $     13,722.7
                                                                ==============  ==============
<FN>
See the accompanying notes to the conconsolidated financial statements.
</FN>
</TABLE>

                                     - 2 -
<PAGE>
<TABLE>
<CAPTION>
                                 Aon CORPORATION
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)

(millions except per share data)

                                                                         Third Quarter Ended         Nine Months Ended
                                                                      ------------------------   ------------------------
                                                                       Sept. 30,     Sept. 30,    Sept. 30,     Sept. 30,
                                                                          1997          1996         1997         1996
                                                                      ----------    ----------   ----------    ----------
<S>                                                                   <C>           <C>          <C>           <C>       
Revenue
  Brokerage commissions and fees ................................     $    923.3    $    454.5   $  2,650.0    $  1,368.0
  Premiums earned ...............................................          398.2         382.1      1,191.5       1,141.4
  Net investment income .........................................          119.6          92.4        353.0         269.7
  Realized investment gains .....................................            2.7           3.1          5.1           3.1
  Other income ..................................................            7.2          12.2         30.2          36.6
                                                                      ----------    ----------   ----------    ----------
    Total revenue earned ........................................        1,451.0         944.3      4,229.8       2,818.8
                                                                      ----------    ----------   ----------    ----------

Benefits and Expenses
  Commissions and general expenses ..............................          966.5         537.2      2,778.2       1,591.2
  Benefits to policyholders .....................................          212.7         203.3        633.5         582.1
  Interest expense ..............................................           18.7           9.1         49.3          28.4
  Amortization of deferred policy acquisition costs .............           47.0          48.3        158.9         156.4
  Amortization of intangible assets .............................           28.3          18.4         93.0          55.6
  Special charges ...............................................             --            --        172.0          30.2
                                                                      ----------    ----------   ----------    ----------
    Total benefits and expenses .................................        1,273.2         816.3      3,884.9       2,443.9
                                                                      ----------    ----------   ----------    ----------

Income from Continuing Operations Before
  Income Tax and Minority Interest ..............................          177.8         128.0        344.9         374.9
    Provision for income tax ....................................           66.6          44.2        129.3         129.3
                                                                      ----------    ----------   ----------    ----------

Income from Continuing Operations Before
  Minority Interest .............................................     $    111.2    $     83.8   $    215.6    $    245.6
    Minority Interest - 8.205% mandatorily redeemable
      preferred capital securities ..............................          (10.2)           --        (29.7)           --
                                                                      ----------    ----------   ----------    ----------

Income from Continuing Operations ...............................          101.0          83.8        185.9         245.6

Discontinued Operations:
Income from discontinued operations, net of tax .................             --            --           --          22.4
Gain on disposal of discontinued operations, net of tax .........             --            --           --          21.0
                                                                      ----------    ----------   ----------    ----------
Net Income ......................................................     $    101.0    $     83.8   $    185.9    $    289.0
                                                                      ==========    ==========   ==========    ==========

Net Income Available for Common Stockholders (1) ................     $     97.6    $     78.8   $    175.8    $    273.8
                                                                      ==========    ==========   ==========    ==========

Per Share: (2)
Income from continuing operations (1) ...........................     $     0.57    $     0.48   $     1.03    $     1.40
Income from discontinued operations .............................             --            --           --          0.13
Gain on disposal of discontinued operations .....................             --            --           --          0.13
                                                                      ==========    ==========   ==========    ==========
Net income (1) ..................................................     $     0.57    $     0.48   $     1.03    $     1.66
                                                                      ==========    ==========   ==========    ==========

Cash dividends paid on common stock (2) .........................     $     0.26    $     0.24   $     0.76    $     0.71
                                                                      ==========    ==========   ==========    ==========

Average common and common equivalent shares outstanding (2) .....          170.8         164.1        170.0         164.6
                                                                      ==========    ==========   ==========    ==========

<FN>
(1)  Includes the effect of $3.4 million and $10.1 million of dividends incurred
     on the 8% and redeemable preferred stock and $5.0 million and $15.2 million
     of dividends  incurred on the 8%, 6.25% and redeemable  preferred  stock in
     third  quarter  and  nine  months  ended   September  30,  1997  and  1996,
     respectively.

(2)  Reflects the three-for-two stock split on May 14, 1997.

 See the accompanying notes to the condensed consolidated financial statements.
</FN>
</TABLE>


                                     - 3 -
<PAGE>
<TABLE>
<CAPTION>
                                 Aon CORPORATION

                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)


                                                                                      Nine Months Ended
                                                                                ---------------------------
                                                                                  Sept. 30,      Sept. 30,
(millions)                                                                           1997           1996
                                                                                ------------   ------------

<S>                                                                             <C>            <C>        
Cash Provided by Operating Activities .......................................   $     472.0    $     375.6
                                                                                ------------   ------------

Cash Flows from Investing Activities:
   Sale (purchase) of short term investments-net ............................         190.0         (307.8)
   Sale or maturity of fixed maturities
   Available for sale -   Maturities ........................................          88.0          105.4
                          Calls and prepayments .............................         108.2          145.2
                          Sales .............................................       1,277.0          569.4
   Sale of equity  investments ..............................................       1,257.6          430.8
   Sale or maturities of other investments ..................................          21.6           40.7
   Purchase of fixed maturities - available for sale ........................      (1,661.6)      (1,276.6)
   Purchase of equity investments ...........................................      (1,139.5)        (469.4)
   Purchase of other investments ............................................         (57.6)        (160.8)
   Disposition (acquisition) of subsidiaries ................................      (1,344.7)       1,253.2
   Acquired fiduciary funds from Alexander & Alexander Services, Inc ........         734.0              -
   Property and equipment and other .........................................         (40.4)         (56.9)
                                                                                ------------   ------------
                          Cash Provided (Used) by Investing Activities ......        (567.4)         273.2
                                                                                ------------   ------------

Cash Flows from Financing Activities:
   Treasury stock transactions - net ........................................          23.7          (35.9)
   Issuance (repayment) of short-term borrowings - net ......................         370.0         (293.1)
   Sale of mandatorily redeemable preferred capital securities ..............         800.0              -
   Repayment of long-term debt ..............................................         (72.4)          (4.1)
   Interest sensitive life, annuity and investment contract deposits ........         167.7          371.0
   Interest sensitive life, annuity and investment contract withdrawals .....         (18.3)        (432.1)
   Retirement of preferred stock ............................................             -          (14.2)
   Cash dividends to stockholders ...........................................        (135.5)        (129.5)
                                                                                ------------   ------------
                          Cash Provided (Used) by Financing Activities ......       1,135.2         (537.9)
                                                                                ------------   ------------

Effect of Exchange Rate Changes on Cash .....................................         (45.5)           0.2
Increase in Cash ............................................................         994.3          111.1
Cash at Beginning of Period .................................................         410.1          115.3
                                                                                ------------   ------------
Cash at End of Period .......................................................   $   1,404.4    $     226.4
                                                                                ============   ============

<FN>
See the accompanying notes to condensed consolidated financial statements.
</FN>
</TABLE>


                                     - 4 -
<PAGE>

            NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1.       Statement of Accounting Principles
         ----------------------------------

         The financial  results included in this report are stated in conformity
         with  generally  accepted  accounting  principles and are unaudited but
         include all normal recurring  adjustments which the Registrant  ("Aon")
         considers  necessary  for a fair  presentation  of the results for such
         periods.  These  interim  figures  are not  necessarily  indicative  of
         results for a full year as further discussed below.

         Refer to the consolidated  financial statements and notes in the Annual
         Report  to  Stockholders  for the  year  ended  December  31,  1996 for
         additional  details  of  Aon's  financial   position,   as  well  as  a
         description  of the  accounting  policies  which  have  been  continued
         without  material  change.  The details  included in the notes have not
         changed  except as a result of normal  transactions  in the interim and
         the events mentioned in the footnotes below.

2.       Stock Split
         -----------
         
         On March 21, 1997, Aon's board of directors  authorized a three-for-two
         stock split on Aon's $1.00 par value  common  stock,  which was paid in
         the form of a stock dividend, of approximately 57 million shares on May
         14, 1997. The stock split has not been  retroactively  reflected in the
         December  31,  1996  condensed  statement  of  consolidated   financial
         position.  The effect of the stock split was to increase  common  stock
         and decrease additional  paid-in-capital by $57 million. All references
         in the accompanying financial statements to the number of common shares
         and per share amounts have been restated to reflect the stock split.

3.       Statements of Financial Accounting Standards (SFAS)
         ---------------------------------------------------

         In June 1997, the Financial  Accounting  Standards  Board (FASB) issued
         Statement No. 130  (Reporting  Comprehensive  Income) and Statement No.
         131   (Disclosures   about   Segments  of  an  Enterprise  and  Related
         Information). Statement No. 130 establishes standards for reporting and
         classifying   components  of  comprehensive  income  in  the  financial
         statements  and  requires  that  the   accumulated   balance  of  other
         comprehensive income be displayed separately from retained earnings and
         additional  paid-in  capital in the equity  section of a  statement  of
         financial  position.   Statement  No.  131  establishes  standards  for
         providing  disclosures  related to products  and  services,  geographic
         areas, and major customers. Aon will adopt these statements in its 1998
         financial statements as required. Implementation of these statements is
         not expected to have a material effect on Aon's financial statements.

         In February  1997,  the FASB issued  Statement  No. 128  (Earnings  per
         Share). This Statement changes the standards for computing earnings per
         share (EPS).  Under the new requirements for calculating basic EPS, the
         dilutive  effect of stock options will be excluded.  The  provisions of
         this  Statement are to be applied after  December 15, 1997, and require
         retroactive restatement of all prior periods presented.  Aon will adopt
         this  statement  in its  December  31,  1997  financial  statements  as
         required.  Implementation  of this  Statement is not expected to have a
         material effect on Aon's financial statements.

         In 1997, Aon adopted  Statement No. 125  (Accounting  for Transfers and
         Servicing of Financial  Assets and  Extinguishments  of Liabilities) in
         its financial statements as required.  Implementation of this Statement
         did not have a material effect on Aon's financial statements.


                                     - 5 -
<PAGE>
4.       Capital Stock
         -------------

         During nine months 1997,  Aon reissued  791,000  shares of common stock
         from treasury for employee  benefit plans.  Aon purchased 60,300 shares
         of its common stock at a total cost of $2.6 million  during nine months
         1997.  In addition,  Aon reissued  243,100  shares of common stock from
         treasury in  connection  with  business  combinations. There  were  3.8
         million shares of common stock held in treasury at September 30, 1997.

5.       Capital Securities
         ------------------

         In January 1997, Aon created Aon Capital A, a statutory business trust,
         for the purpose of issuing  mandatorily  redeemable  preferred  capital
         securities  (capital  securities).  The sole asset of Aon  Capital A is
         $824  million  aggregate   principal  amount  of  Aon's  8.205%  Junior
         Subordinated Deferrable Interest Debentures due January 1, 2027.

         Aon  Capital A issued  $800  million of 8.205%  capital  securities  in
         January 1997. The proceeds from the issuance of the capital  securities
         were used to finance a portion of Aon's  acquisition  of Alexander  and
         Alexander  Services Inc. (A&A).  The capital  securities are subject to
         mandatory redemption on January 1, 2027 or are redeemable in whole, but
         not in  part,  at the  option  of Aon upon the  occurrence  of  certain
         events.  The  capital  securities  are  categorized  on  the  condensed
         consolidated  statement  of  financial  position as  "Company-obligated
         Mandatorily Redeemable Preferred Capital Securities of Subsidiary Trust
         holding  solely the  Company's  Junior  Subordinated  Debentures."  The
         after-tax  interest  incurred on the capital  securities is reported as
         minority   interest  on  the  condensed   consolidated   statements  of
         operations.

6.       Business Combinations
         ---------------------

         Third quarter 1997  operating  results were impacted by the acquisition
         of The Minet Group (Minet) by certain insurance brokerage  subsidiaries
         of Aon.   This acquisition  was accounted  for by the  purchase method.
         The effect of the  acquisition  was not material to Aon's  consolidated
         financial statements.

         In early 1997,  Aon  completed  its  acquisition  of A&A for a purchase
         price  of  approximately  $1.2  billion.  The  acquisition  of A&A  was
         accounted  for by the purchase  method and was financed by the issuance
         of the  capital  securities,  commercial  paper,  and  internal  funds.
         Results have been included in Aon's consolidated  financial  statements
         since  January 1,  1997.  While A&A was  acquired  in early  1997,  the
         purchase  valuation has not yet been  completed.  Preliminary  purchase
         accounting  liabilities  of  approximately  $200 million were recorded,
         primarily   relating  to   severance   and  related   costs,   and  the
         consolidation of real estate space.  Preliminary  intangible  assets of
         approximately $1.2 billion were created by the acquisition.

         If the A&A  acquisition  had been  consummated  on January 1, 1996, the
         nine months 1996 unaudited proforma  consolidated results of operations
         would have resulted in total  revenues of  approximately  $3.8 billion,
         income from continuing operations of $258 million ($1.29 per share) and
         net income of $301 million ($1.55 per share).


                                     - 6 -
<PAGE>
         Pro forma financial information presented is not necessarily indicative
         either of  results of  operations  that  would  have  occurred  had the
         acquisition  been effective on January 1, 1996, or of future results of
         the  operations  of Aon.  In  addition,  the effect of special  charges
         related to the A&A  acquisition  are not reflected in the proforma 1996
         results above (see note 7).

7.       Special Charges
         ---------------

         In second  quarter 1997,  Aon recorded  pretax  special  charges of $27
         million  ($16.9  million  after-tax  or $.10 per  share)  to  recognize
         investment  losses  incurred  at  A&A  before  Aon  acquired  A&A.  Aon
         discovered  in the  second  quarter  that  A&A's  investment  portfolio
         contained   certain  highly   volatile   securities   with   previously
         unrecognized  losses.  These  charges  were  reflected  as  a  separate
         component of total benefits and expenses in the condensed  consolidated
         statements of operations.

         In first  quarter 1997,  Aon recorded  pretax  special  charges of $145
         million ($90.6 million after-tax or $0.54 per share), primarily related
         to  management's  commitment  to a formal plan of  restructuring  Aon's
         brokerage  operations  as a result  of the  acquisition  of A&A.  These
         charges were  reflected as a separate  component of total  benefits and
         expenses in the condensed  consolidated  statements of  operations.  In
         connection  with  the  first  quarter  1997  special  charges,  Aon had
         approximately  $90  million  reported  in the commissions  and  general
         expenses liability at  September 30, 1997, representing amounts related
         to the special charges that have not yet been paid.Pretax restructuring
         charges include   approximately  $105  million  associated   with  real
         estate activities including  the  closure, abandonment  and  downsizing
         of various offices around the world, and other consolidation costs. The
         restructuring charges related to  consolidating  real estate  space are
         expected  to  be  paid  out over  several  years.  Special  charges for
         severance and related costs were approximately $40 million.Terminations
         resulting  from  workforce  reductions are planned to take place within
         one year from the date of acquisition.

         Additional terminations resulting from workforce reductions are planned
         to take place  within one year from the date of acquisition.  Severance
         and  related  costs  associated  with  these workforce  reductions were
         included as part of the preliminary purchase accounting liabilities.

         In 1996, Aon recorded  pretax  special  charges of $90.5 million ($59.3
         million  after-tax  or $0.36 per share).  In  connection  with the 1996
         special  charges,  Aon  had  approximately   $40  million  reported  in
         the commissions  and general expenses liability  at  September 30, 1997
         representing  amounts related to the special  charges that have not yet
         been paid.

8.       A&A Discontinued Operations
         ---------------------------

         A&A discontinued its insurance underwriting operations in 1985 and sold
         Sphere Drake Insurance Group (Sphere Drake) in 1987. In connection with
         the sale of Sphere  Drake, A&A provided  indemnities  to the  purchaser
         for  various  potential  liabilities,  including  provisions   covering
         future  losses  on  certain  insurance  pooling  arrangements   between
         Sphere Drake and  The  Orion Insurance Company plc  (Orion), a UK based
         insurance company placed in provisional liquidation in 1994, and future
         losses  pursuant to a stop-loss  reinsurance  contract  between  Sphere
         Drake and Lloyd's Syndicate 701. The Sphere Drake  sales agreement also
         states that  A&A  assumes  any losses  in  respect  of the  actions  or
         omissions  by various underwriting agencies including  Swann &  Everett
         Underwriting  Agency, previously  managed  by a subsidiary of A&A.


                                     - 7 -
<PAGE>
         The  net   liabilities  of   discontinued   operations   shown  in  the
         accompanying  condensed  consolidated  statements of financial position
         include insurance  liabilities  associated with the above  indemnities,
         liabilities  of  its  insurance  underwriting   subsidiaries  that  are
         currently  in run-off and its  indemnification  of certain  liabilities
         relating to subsidiaries  sold.  Excluded from these liabilities is A&A
         long-term debt related to two finite risk reinsurance  contracts  which
         are associated with the financing of discontinued  operations. Included
         in   Aon's  September  30, 1997  condensed  consolidated  statement  of
         financial position and condensed consolidated statement  of  operations
         is long-term debt of $40 million and  related interest  expense of $3.3
         million,  respectively. The net liabilities for discontinued operations
         as of September 30, 1997 are composed of the following:

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

(millions)
- --------------------------------------------------------------------------------
Assets:
   Insurance liabilities recoverable under finite risk contracts         $   147
   Reinsurance recoverables                                                   59
   Cash and investments                                                       32
   Other                                                                       7
                                                                         -------
Total assets                                                             $   245
                                                                         -------
Liabilities:
   Insurance liabilities                                                 $   273
   Other                                                                      16
                                                                         -------
Total liabilities                                                            289
                                                                         -------
Total net liabilities of discontinued operations classified as
   other liabilities                                                     $    44
- --------------------------------------------------------------------------------

         The insurance liabilities represent estimates of future claims expected
         to be made under  occurrence-based  insurance  policies and reinsurance
         business  covering primarily  asbestos,  environmental  pollution,  and
         latent  disease  risks in the  United  States  which are  coupled  with
         substantial  litigation expenses.  These claims are expected to develop
         and be settled over the next twenty to thirty years.

         Liabilities  stemming  from  these  claims  cannot be  estimated  using
         conventional  actuarial reserving  techniques because of the inadequacy
         of available  historical  experience  to support such  techniques,  and
         because case law, and scientific standards  for measuring  the adequacy
         of  site  clean-up  are  still  evolving.  Therefore, A&A's independent
         actuaries  have  combined  available  exposure  information with  other
         relevant industry data  and  have  used  various  projection techniques
         to  estimate  the  insurance and reinsurance  liabilities,   consisting
         principally of incurred  but not reported  losses.  As noted above, A&A
         has  certain protection  against adverse  developments of the insurance
         liabilities  through  several finite  risk  contracts.  The recoverable
         amounts  under the finite risk  contracts represent the  excess of such
         liabilities over the retention levels.

         While the insurance  liabilities  set forth above  represent A&A's best
         estimate  of the  probable  liabilities  within a range of  independent
         actuarial  estimates of reasonably  probable loss amounts,  there is no
         assurance  that  further  adverse  developments  may  not occur  due to
         the nature of the information available to A&A, variables  inherent  in
         the  estimation  processes, and  other  matters  described above. Based
         on independent  actuarial  estimates of a range of reasonably  possible
         loss amounts,  liabilities  could exceed  recorded amounts,  subject to
         offset  in  the  event  of such  adverse  development by way of amounts
         recoverable  under  the  finite  risk  contracts  referenced above. Aon
         believes that, based on current  estimates,  the established  total net
         liabilities of  discontinued  operations  are sufficient to cover A&A's
         exposure.

                                     - 8 -
<PAGE>
9.       Contingencies
         -------------

         A&A Contingencies
         -----------------

         A  certain  pending  claim  asserted  against  A&A and  certain  of its
         subsidiaries   allege  that  certain   Alexander  Howden   subsidiaries
         accepted,  on behalf  of  certain  insurance  companies,  insurance  or
         reinsurance  at  premium  levels  not  commensurate  with the  level of
         underwriting risks assumed and retroceded or reinsured those risks with
         financially unsound reinsurance companies. In an action brought in 1988
         against A&A and certain  subsidiaries,  plaintiffs sought  compensatory
         and punitive damages, as well as treble damages under RICO totaling $36
         million.   The  defendants   counterclaimed   against  certain  of  the
         plaintiffs  for  contribution.   As  part  of  the  Lloyd's  of  London
         Reconstruction  and Renewal Plan ("R&R Plan"),  most of A&A's  exposure
         with  respect to this claim has been  extinguished  or  assigned to the
         reinsurance  entity  (Equitas)  created to effectuate the R&R Plan. The
         remainder of the exposure  relates to one  insurance  company which may
         shortly become a participant in the R&R Plan.  Notwithstanding  the R&R
         Plan, the management of Aon believes that A&A has valid defenses to all
         of the claims that have been made with respect to these  activities and
         should the pending action  continue  because the one insurance  company
         does not  participate  in the R&R Plan, A&A will continue to vigorously
         defend the  action.  This action is covered  under  A&A's  professional
         indemnity  program,   except  for  possible  damages  under  RICO.  Aon
         currently believes the reasonably  possible loss that might result from
         this action, if any, would not be material to Aon's financial  position
         or results of operations.

         In 1987,  A&A sold  Shand  Morahan  &  Company  (Shand),  its  domestic
         underwriting  management  subsidiary.  Prior to the sale, Shand and its
         subsidiaries  had  provided  underwriting  management  services for and
         placed  insurance  and  reinsurance  with and on behalf of Mutual  Fire
         Marine & Inland Insurance Company (Mutual Fire). Mutual Fire was placed
         in rehabilitation in December 1986. In February 1991, the rehabilitator
         commenced  an action.  The  complaint,  which sought  compensatory  and
         punitive  damages,  alleged that Shand,  and in certain  respects  A&A,
         breached  duties to and agreements with Mutual Fire. On March 27, 1995,
         A&A, Shand and the  rehabilitator  entered into a settlement  agreement
         which  was   approved   by  the   courts  and  which   terminated   the
         rehabilitator's  litigation and released A&A and Shand from any further
         claims by the  rehabilitator.  Under the terms of the  settlement,  A&A
         paid $43.1 million.  Although A&A's professional liability underwriters
         have denied coverage for the Mutual Fire lawsuit,  A&A has instituted a
         declaratory judgment action attempting to validate coverage. On October
         16, 1996, the Court issued a decision  holding that A&A is not entitled
         to coverage for the rehabilitator's claims. A&A has appealed the ruling
         and a decision is pending from the appellate court.

         Under the 1987  agreement  with the  purchaser of Shand,  A&A agreed to
         indemnify the purchaser against certain contingencies, including, among
         others, (i) losses arising out of presale transactions between Shand or
         Shand's  subsidiaries,  on the one hand, and Mutual Fire, on the other,
         and (ii) losses  arising out of presale errors or omissions by Shand or
         Shand's  subsidiaries.  A&A's  obligations  under  the  indemnification
         provisions in the 1987 sales agreement were not limited as to amount or
         duration.

         Starting in late 1992,  the purchaser of Shand has asserted a number of
         claims  under both the Mutual Fire  indemnification  provision  and the
         errors and omissions  indemnification provision of the sales agreement.
         During  1995,  most of  those  claims  were  resolved  by a  series  of
         settlement agreements. Notwithstanding these settlements, which had the
         effect   of   limiting   certain   contractual


                                     - 9 -
<PAGE>
         obligations and the restructuring of the parties' relationship, some of
         A&A's indemnification  provisions under the 1987 agreement are still in
         effect.  As a result,  there  remains the  possibility  of  substantial
         exposure  to A&A  under  the  indemnification  provisions  of the  1987
         agreement,  although  Aon,  based on current  facts and  circumstances,
         believes that the  possibility  of a material loss resulting from these
         exposures is remote.

         Although the ultimate  outcome of these suits and  exposures  cannot be
         ascertained and liabilities in indeterminate  amounts may be imposed on
         A&A  or  its  subsidiaries,   on  the  basis  of  present  information,
         availability  of insurance  coverages and advice received from counsel,
         it is the  opinion  of  management  that the  disposition  or  ultimate
         determination  of such  claims  and  lawsuits  will not have a material
         adverse effect on the consolidated financial position of Aon.

         Other Contingencies
         -------------------

         Aon and its  subsidiaries  are subject to numerous  claims and lawsuits
         that arise in the ordinary course of business.  Some of these cases are
         being  litigated in  jurisdictions  which have judicial  precedents and
         evidentiary  rules which are  generally  believed  to favor  individual
         plaintiffs  against  corporate  defendants.  The  damages  that  may be
         claimed in these and other jurisdictions are substantial,  including in
         many instances claims for punitive or extraordinary  damages.  Accruals
         for these  lawsuits  have been  provided  to the extent that losses are
         deemed probable and are estimable.

10.      Derivatives and Market Risk Disclosure
         --------------------------------------

         In first quarter 1997,  the Securities  and Exchange  Commission  (SEC)
         issued new rules related to disclosure concerning derivative accounting
         policy  and market  risk  outside  the  financial  statements.  Aon has
         adopted the additional accounting policy disclosures as required, based
         on a review of current  derivatives and related accounting  policies as
         set forth in note 11 in the Annual  Report for the year ended  December
         31, 1996. The following additional  disclosure  references all material
         derivative activity that Aon is currently engaged in.

         In most cases,  derivatives  hedging the invested  asset  portfolio are
         hedging the portfolio as a whole. The sale,  maturity or extinguishment
         of a hedged  portfolio item would not affect the accounting  method for
         the  derivative.   The  only  time  the  accounting   relating  to  the
         termination  of  a  hedge  would  differ  from  the  company's  regular
         accounting  practices would be if the hedge ceases to meet the criteria
         for hedge accounting.

         The following criteria must be met in order for a derivative to qualify
         for hedge  accounting.  The derivative must be designated as a hedge at
         inception and be consistent with Aon's policy for risk management.  The
         hedged  portfolio item must have a reliably  measurable  fair value and
         changes  in fair  value  must  have  the  potential  to  affect  future
         earnings.  Changes in the fair value of the derivative must be expected
         to  substantially  offset  changes in the fair value of the  designated
         portfolio item attributable to the risk being hedged.

         If the criteria for hedge  accounting is not met, the resulting gain or
         loss from the  termination  of the hedge would be realized  through the
         statement of operations in the current period.


                                     - 10 -
<PAGE>
                                 Aon CORPORATION
                   MANAGEMENT'S ANALYSIS OF OPERATING RESULTS
                             AND FINANCIAL CONDITION

                      REVENUE AND INCOME BEFORE INCOME TAX
                     FOR THIRD QUARTER AND NINE MONTHS 1997


Consolidated Results
- --------------------

Brokerage  commissions  and fees  increased  $468.8  million  or 103.1% and $1.3
billion or 93.7% in third quarter and nine months 1997, respectively, reflecting
primarily  business  combination  activity related to the acquisitions of A&A in
first quarter 1997,  Bain Hogg Group plc (Bain Hogg) in fourth quarter 1996 and,
to a lesser extent, Minet and certain other 1997 brokerage acquisitions.

Premiums  earned  increased  $16.1  million or 4.2% and $50.1 million or 4.4% in
third quarter and nine months 1997, respectively, compared with the same periods
last year. Extended warranty premiums earned increased $28.3 million or 29.6% in
the quarter reflecting continued growth in both the mechanical and the appliance
and electronic  lines.  There was also  continued  modest growth in direct sales
business.  The planned runoff of North American auto credit  business  partially
offset this growth in premiums earned.

Net  investment  income  increased  $27.2  million or 29.4% and $83.3 million or
30.9% in the third quarter and nine months 1997, respectively,  when compared to
prior year.  Investment  income growth in nine months was  primarily  related to
brokerage  acquisitions,  and to  income  received  on  certain  private  equity
investment  holdings.   Net  investment  income  from  insurance  brokerage  and
consulting  operations,  primarily relating to fiduciary funds, increased to $43
million in third  quarter 1997 from $17 million in 1996,  and to $120 million in
nine  months  1997  from  $51  million  in  1996,  primarily  due  to  brokerage
acquisition activity.

Total revenue increased $506.7 million or 53.7% and $1.4 billion or 50.1% in the
third  quarter and nine  months  1997,  respectively,  largely  attributable  to
acquisition-related growth in brokerage commissions and fees.Realized investment
gains  were  $5.1  million  and  $3.1  million  in  nine  months  1997 and 1996,
respectively.  Nine months 1997 revenue,  excluding  realized  investment gains,
increased 50% when compared to prior year.

Benefits  to  policyholders  increased  4.6% or $9.4  million  and 8.8% or $51.4
million in third quarter and nine months 1997, respectively, reflecting a higher
volume of new extended warranty business.  This increase was partially offset by
lower claims paid on auto credit  business  that has been in runoff since second
quarter  1996. It is  anticipated  that this business will continue to runoff as
planned.

In second  quarter  1997,  Aon recorded  pretax  special  charges of $27 million
($16.9 million after-tax) to recognize  investment losses incurred at A&A before
Aon acquired  A&A. At Aon's  acquisition  date,  the  carrying  value of certain
securities in A&A's  portfolio was  overstated  by the  previously  unrecognized
investment losses.

In first  quarter  1997,  Aon recorded  pretax  special  charges of $145 million
($90.6  million   after-tax)  which  were  primarily   related  to  management's
commitment to a formal plan of  restructuring  Aon's  brokerage  operations as a
result of the acquisition of A&A.  Restructuring charges included  approximately
$105  million  associated  with real estate  activities  including  the closure,
abandonment  and  downsizing  of various  offices  around  the world,  and other
consolidation  costs. The  restructuring  charges related to consolidating  real
estate space are expected to be


                                     - 11 -
<PAGE>
paid out over several  years.  Special  charges for  severance and related costs
were approximately $40 million. Terminations resulting from workforce reductions
are planned to take place within one year from the date of acquisition.

Additional terminations resulting from workforce reductions are  planned to take
place  within  one year  from  the  date of  acquisition.  Severance and related
costs  associated  with these workforce reductions  were included as part of the
preliminary  purchase  accounting  liabilities (see note 6).

In nine months 1996, Aon reported pretax special charges of $30.2 million ($19.5
million after-tax) related to early retirement programs.  Both the 1997 and 1996
special  charges were  reflected  as a separate  component  of  commissions  and
general expenses in the condensed consolidated statements of operations.

Total benefits and expenses  increased $456.9 million or 56% and $1.4 billion or
59% in third quarter and nine months 1997, respectively,  when compared to prior
year.  The increase in the nine months  expenses  reflects the inclusion of 1997
and 1996 pretax special charges. Total benefits and expenses, excluding the 1997
and 1996 special  charges,  increased 53.8% for the nine months 1997,  primarily
reflecting brokerage  acquisition  activity.  Income before income tax increased
$49.8  million or 38.9% in third quarter 1997 and decreased $30 million or 8% in
the nine months 1997, respectively, when compared to prior year. The decrease in
nine months pretax  earnings  reflects the  inclusion of special  charges and is
offset,  in part, by growth in the insurance  brokerage and  consulting  segment
following the A&A, Bain Hogg,  Minet and certain other  brokerage  acquisitions.
Excluding special charges,  income before income tax increased 28% when compared
to nine months 1996.



Major Lines of Business
- -----------------------

General
- -------

For purposes of the following line of business discussions,  comparisons against
last year's results  exclude special  charges.  Cost savings at similar business
segments at Aon,  A&A  and  Bain Hogg  began to be realized starting  in  second
quarter 1997.  Management  anticipates that the full benefit of cost  savings on
operations  will be achieved starting in 1998. In addition, references to income
before  income tax exclude minority  interest related to the capital securities.

Insurance Brokerage and Consulting Services
- -------------------------------------------

In first  quarter 1997,  Aon acquired A&A for  approximately  $1.2  billion.  In
fourth  quarter 1996,  Aon acquired  Bain Hogg.  In addition,  Minet and certain
other brokerage  acquisitions were completed in third quarter 1997. As a result,
revenue and income  before  income tax results  between  third  quarter and nine
months 1997 and 1996 are not comparable.

"Insurance and other services"  (retail,  reinsurance  and wholesale  brokerage)
revenue  increased $428 million or 105.3% in the third quarter 1997 and $1,153.7
million or 95.3% for nine months 1997 when  compared  with the same periods last
year,  largely  due  to  acquisition  activity.  Insurance  and  other  services
continued to reflect  highly  competitive  property and casualty  pricing in the
domestic market.

                                     - 12 -
<PAGE>
"Consulting"  provides  a full  range  of  employee  benefits  and  compensation
consulting,   specialized   employee  assessment  and  training  programs,   and
administrative services. This business showed revenue growth of $67.3 million or
103.7% and $198.1  million or 95.5% for the third  quarter and nine months 1997,
respectively, when compared to prior year, primarily due to acquisition activity
and,  to a  lesser  extent,  expanding  integrated  human  resources  consulting
programs.

Overall,  revenue for the insurance  brokerage and consulting  services  segment
increased  $495.3  million or 105.1% and $1,351.7  million or 95.3% in the third
quarter and nine months 1997,  respectively.  Income before income tax increased
$67.2  million  or 120.6% and $160.8  million  or 81.2% when  compared  to third
quarter and nine months 1996,  respectively.  The brokerage segment continues to
be  impacted  by a  soft  property  and  casualty  market,  particularly  in the
reinsurance brokerage business.  Acquisitions accounted for the vast majority of
the above mentioned revenue growth in the nine months. However,  organic revenue
growth  represented  approximately  3-4%.  Excluding the impact of acquisitions,
revenue  and  pretax  income  results   related  to  brokerage  core  businesses
demonstrated modest growth in a very competitive environment.

U.S./International Results
- --------------------------

Third  quarter  U.S.  insurance   brokerage  and  consulting   services  revenue
represents  55% of the  worldwide  total  and  U.S.  income  before  income  tax
represents 58% of the worldwide total. International brokerage revenue of $435.3
million increased 207.2% for the third quarter, primarily reflecting the A&A and
Bain  Hogg  acquisitions.  International  brokerage  income  before  income  tax
increased  for the third  quarter  reflecting  the above  mentioned  acquisition
activity.  International  brokerage  revenues for risk  management and insurance
brokerage services generally are strongest during the first quarter of the year,
particularly for Continental Europe,  while expenses are incurred on a more even
basis throughout the year.

Insurance Underwriting
- ----------------------

The insurance underwriting line of business primarily provides direct sales life
and accident and health products, and extended warranty products to individuals.
Revenue  increased $15.9 million or 3.6% and $54.9 million or 4.2% for the third
quarter  and nine  months  1997,  respectively,  when  compared  to  prior  year
primarily due to growth in the worldwide  extended warranty lines.  Direct sales
business also continued to grow modestly.

Pretax income from insurance underwriting increased $1.9 million or 2.7% and $12
million or 6.1% in the third  quarter and nine months 1997,  respectively,  when
compared with last year.  Overall,  benefit and expense margins in third quarter
1997 did not suggest any  significant  shift in operating  trends.  Direct sales
accident  & health  business  improved  its  pretax  margin  in part due to good
general expense controls and good international  health product sales.  Extended
warranty  profits  suffered  slightly due to an increase in loss experience on a
closed  block of  mechanical  warranty  business.  Certain  specialty  liability
programs and auto credit business continued to be profitably run off.

U.S./International Results
- --------------------------

Third  quarter  U.S.  insurance  underwriting  revenue  represents  70%  of  the
worldwide  total  and  U.S.  income  before  income  tax  represents  69% of the
worldwide total. U.S. insurance  underwriting income before income tax increased
2.3% in the  quarter  when  compared  to its 1996  level.  Results  reflect  the
completed sale of the North American auto credit  underwriting  and distribution
operations in second  quarter 1996 and reflect the planned  continued  runoff of
those operations. International insurance underwriting revenue of $137.1 million
increased 8.9% in the quarter  principally  due to growth in premiums  earned in
both the direct sales and extended 


                                     - 13 -
<PAGE>
warranty  lines.  International  pretax  income  increased  2.8% in the quarter,
primarily due to improved health product sales.

Corporate and Other
- -------------------

Revenue in this category  consists  primarily of investment  income on insurance
underwriting  operations'  capital  and  realized  investment  gains.  Insurance
company investment income is allocated to the underwriting  segment based on the
invested assets which underlie policyholder liabilities.  Excess invested assets
and related  investment  income,  which do not underlie these  liabilities,  are
reported  in  this  segment.  Expenses  include  interest  and  other  financing
expenses,   goodwill  amortization   associated  with  insurance  brokerage  and
consulting acquisitions, and corporate administrative costs.


Alternative  uses  of corporate  capital contributed to a decrease in revenue of
15.1%  or  $4.5  million  in  the  third  quarter.   Higher levels of investment
income received on certain private equity investment holdings  contributed to an
increase  of  $4.4  million  or 5.7%  for  nine  months  1997.  Pretax  realized
investment  gains for the third  quarter and nine months 1997 and 1996 were $2.7
million and $3.1 million and $5.1 million and $3.1 million, respectively. Income
before income tax, excluding realized investment gains,  decreased $18.9 million
in the quarter and  decreased  $63 million in nine months over the same  periods
last year.  Contributing to the decrease in the quarter were financing costs and
goodwill amortization related to acquisitions,  in particular A&A and Bain Hogg,
and  additional  interest  expenses on  short-term  debt related to  acquisition
financing.


Discontinued Operations
- -----------------------

Discontinued  operations in nine months 1996 were composed  principally  of U.S.
based capital accumulation products and direct response products.  These amounts
have been segregated as "Income From  Discontinued  Operations" in the condensed
consolidated  statements of operations.  With the completion of the sales of The
Life  Insurance  Company of Virginia  (LOV) and Union  Fidelity  Life  Insurance
Company  (UFLIC) on April 1, 1996,  there were no  operating  results from these
discontinued  operations going forward. The sales of LOV and UFLIC resulted in a
$21 million  after-tax  gain on disposal  which was  recorded in second  quarter
1996.

Following  its  acquisition of A&A  in  first  quarter  1997, net liabilities of
certain  A&A  group  companies   related   to  acquired  insurance  underwriting
subsidiaries  that  are  currently  in  runoff, and  indemnification of  certain
liabilities  relating  to  subsidiaries  sold  by  A&A,  represent  discontinued
operations (see note 8 to the condensed consolidated  financial statements). Aon
believes  that  these  discontinued operations  are adequately reserved for. The
net  liability  is  included  as  a  component  of   other  liabilities  on  the
statement of financial position.


                                     - 14 -
<PAGE>
<TABLE>
<CAPTION>
                                 Aon CORPORATION
                             MAJOR LINES OF BUSINESS


                                                     Third Quarter Ended         Nine Months Ended
                                                -------------------------    --------------------------

                                                   Sept. 30,    Percent        Sept. 30,      Percent
(millions)                                             1997      Change          1997         Change
                                                ------------  -----------    ------------  ------------

Revenue

<S>                                             <C>                 <C>      <C>                   <C>  
Insurance brokerage and consulting services .   $      966.7        105.1%   $    2,770.4          95.3%

Insurance underwriting ......................          458.9          3.6         1,378.0           4.2

Corporate and other .........................           25.4        (15.1)           81.4           5.7
                                                ------------  -----------    ------------  ------------
   Total revenue ............................   $    1,451.0         53.7%   $    4,229.8          50.1%
                                                ============  ===========    ============  ============




Income Before Income Tax

Insurance brokerage and consulting services .   $      122.9        120.6%   $      358.9          81.2%
   Special charges ..........................             --           --          (145.0)          N/A
                                                ------------  -----------    ------------  ------------
   Including special charges ................          122.9        120.6           213.9          21.7

Insurance underwriting ......................           72.3          2.7           207.6           6.1
   Special charges ..........................             --           --              --            --
                                                ------------  -----------    ------------  ------------
   Including special charges ................           72.3          2.7           207.6           9.7

Corporate and other .........................          (17.4)         N/A           (49.6)          N/A
   Special charges ..........................             --           --           (27.0)          N/A
                                                ------------  -----------    ------------  ------------
   Including special charges ................          (17.4)         N/A           (76.6)          N/A
                                                ------------  -----------    ------------  ------------
   Total income before income tax............   $      177.8         38.9%   $      344.9          (8.0%)
                                                ============  ===========    ============  ============
</TABLE>

                                     - 15 -
<PAGE>
<TABLE>
<CAPTION>
                                 Aon CORPORATION
                          REVENUE BY MAJOR PRODUCT LINE





                                                         Third Quarter Ended               Nine Months Ended
                                                     ----------------------------    ----------------------------

                                                       Sept. 30,       Percent        Sept. 30,        Percent
(millions)                                                1997          Change           1997           Change
                                                     ------------    ------------    ------------    ------------

<S>                                                  <C>                    <C>      <C>                     <C>  
Insurance brokerage and consulting services
Insurance and other services ................        $      834.5           105.3%   $    2,364.9            95.2%
Consulting ..................................               132.2           103.7           405.5            95.5
                                                     ------------    ------------    ------------    ------------
   Total revenue ............................        $      966.7           105.1%   $    2,770.4            95.3%
                                                     ============    ============    ============    ============


Insurance underwriting
Direct sales - life, accident and health ....        $      258.5             1.1%   $      772.9             0.8%
Extended warranty ...........................               142.0            23.2           419.2            23.4
Other .......................................                58.4           (19.0)          185.9           (14.4)
                                                     ------------    ------------    ------------    ------------
   Total revenue ............................        $      458.9             3.6%   $    1,378.0             4.2%
                                                     ============    ============    ============    ============


Corporate and other
Investment income on capital and other ......        $       22.7           (15.3)%  $       76.3             3.2%
Realized investment gains ...................                 2.7           (12.9)            5.1            64.5
                                                     ------------    ------------    ------------    ------------
   Total revenue ............................        $       25.4           (15.1)%  $       81.4             5.7%
                                                     ============    ============    ============    ============
</TABLE>


                                     - 16 -
<PAGE>
                NET INCOME FOR THIRD QUARTER AND NINE MONTHS 1997

References to share data reflect the three-for-two  stock split on May 14, 1997.
Third  quarter net income was $101 million  ($0.57 per share)  compared to $83.8
million ($0.48 per share) in 1996. Net income for nine months was $185.9 million
($1.03 per share)  compared to $289 million ($1.66 per share).  Included in nine
months  1997 and 1996 net income  per share are  after-tax  realized  investment
gains of $0.02 per share and $0.01 per share, respectively. The decrease in nine
months 1997 net income and the related per share amount is primarily  influenced
by: (1)  after-tax  1997  special  charges of $107.5  million  ($0.64 per share)
compared to after-tax  1996 special  charges of $19.5 million ($0.12 per share);
(2) the 1997  deduction for after-tax  distributions  on the capital  securities
(reflected as "minority  interest" on the condensed  consolidated  statements of
operations);  (3) operating results from 1996 discontinued operations due to the
completion  of the sales of UFLIC  and LOV in second  quarter  1996  ($0.13  per
share);  and (4) after-tax gain on disposal of  discontinued  operations in 1996
($0.13 per share).

Operating income from continuing operations before special charges, and realized
investment  gains was $99.2 million  ($0.56 per share) and $290.2 million ($1.65
per share) in the third quarter and nine months 1997, respectively,  compared to
$81.8  million  ($0.47 per share)  and $263.3  million  ($1.51 per share) in the
third quarter and nine months 1996, respectively.

The effective  tax rate on continuing  operations  for operating  income,  which
excludes after-tax realized  investment gains, was 37.5%, up from 34.5% for nine
months 1997 and 1996,  respectively,  due to changes in business  mix.  Realized
gains were taxed at 37.5% and 36% for nine months  1997 and 1996,  respectively.
Average shares  outstanding  for third quarter 1997 increased 4.1% when compared
to 1996  primarily due to the  conversion of preferred  stock to common stock in
fourth quarter 1996.




                        CASH FLOW AND FINANCIAL POSITION
                         AT THE END OF NINE MONTHS 1997


General
- -------

Consistent  with  financial  statement  presentation,  the  following  cash flow
discussion reflects the acquisition of Minet in third quarter 1997, A&A in first
quarter  1997  and Bain  Hogg in  fourth  quarter  1996.  As a  result  of these
transactions,  the amounts contained in the condensed  consolidated statement of
cash flows for nine months 1997 are not comparable to the same period in 1996.

Cash flows from operating activities in nine months 1997 were $472.0 million, an
increase  of $96.4  million  from  nine months  1996.  This  increase  primarily
reflects the acquisitions noted above, the timing of the settlement of insurance
segment  receivables  and  payables,  and the  payments  on special  charges and
valuation adjustments relating to the acquisitions of A&A and Bain Hogg.

Investing  activities  used cash of $567.4 million which was made available from
financing and operating  activities.  Cash used for acquisition  activity during
nine months 1997 was $1.3 billion, primarily reflecting the A&A acquisition.


                                     - 17 -
<PAGE>
Cash  totaling  $1,135.2  million  was  provided  during  nine  months 1997 from
financing  activities.  The increase is primarily a result of funds  provided on
the issuance of the capital securities. Cash was used to pay dividends of $125.4
million on common  stock,  $8.2  million on 8%  cumulative  perpetual  preferred
stock, and $1.9 million on redeemable preferred stock.

Aon's operating subsidiaries anticipate that there will be adequate liquidity to
meet their needs in the foreseeable future.  Aon's liquidity needs are primarily
for  servicing  its debt and for the payment of  dividends  on stock  issues and
capital securities.  The businesses of Aon's operating  subsidiaries continue to
provide  substantial  positive  cash  flow.  Brokerage  cash  flow has been used
primarily  for  acquisition  financing.  Aon  anticipates  continuation  of  the
company's  positive  cash flow,  the  ability  of the  parent  company to access
adequate short-term lines of credit, and sufficient cash flow in the long-term.

Due to the contractual  nature of its insurance  policyholder  liabilities which
are  intermediate  to long-term in nature,  Aon has invested  primarily in fixed
maturities.  With a carrying  value of $3 billion,  Aon's  total fixed  maturity
portfolio is invested  primarily in investment  grade  holdings  (96%) and has a
fair value which is 105.1% of amortized cost.

Total  assets  increased  $4.1 billion to $17.8  billion  since  year-end  1996,
primarily due to the  acquisition of A&A.  Invested assets at September 30, 1997
increased $313.8 million from year-end levels, primarily due to higher levels of
short-term  investments.  The  amortized  cost  and  fair  value  of  less  than
investment grade fixed maturity  investments, at September 30, 1997, were $107.5
million and $115.8  million,  respectively.  The  carrying  value of  non-income
producing  investments  in Aon's  portfolio  at  September  30,  1997 was  $69.3
million, or 1.2% of total invested assets.

Aon uses derivative financial instruments  (primarily financial futures,  swaps,
options  and  foreign   exchange   forwards)  to:  (a)  hedge  foreign  currency
transaction risk and other business risks; (b) hedge asset price risk associated
with financial instruments whose change in value is reported under SFAS 115; and
(c) manage its overall asset/liability duration match. As of September 30, 1997,
Aon had  open  contracts  which  had  unrealized  gains  of  approximately  $1.6
million.

Insurance brokerage and consulting  services  receivables increased $946 million
and insurance premiums payable  increased $1.6 billion in nine months 1997  when
compared  to  year-end  1996,  primarily  reflecting  the  A&A acquisition. When
compared to 1996,  intangible  assets increased  approximately  $1.2 billion due
to the A&A acquisition (see note 6).

In first quarter 1997, Aon completed the  acquisition of A&A. The purchase price
of  approximately  $1.2 billion was funded by the issuance of commercial  paper,
internal  funds,  and  the  issuance  of  $800  million  of  8.205%  mandatorily
redeemable  preferred  capital  securities  (capital  securities).  The  capital
securities are designated on the condensed  consolidated  statement of financial
position  as   "Company-obligated   Mandatorily   Redeemable  Preferred  Capital
Securities of Subsidiary Trust holding solely the Company's Junior  Subordinated
Debentures." Short-term borrowings increased at the end of third quarter 1997 by
$379.2 million when compared to year-end 1996,  primarily due to the issuance of
commercial paper for acquisition  activity.  Notes  payable increased at the end
of third  quarter  1997 by  $170.9  million  when  compared  to  year-end  1996,
primarily due to  acquisition financing.  Included in notes payable at September
30, 1997 is  approximately  $25 million which represents the principal amount of
notes due within one year.


                                     - 18 -
<PAGE>
At September 30, 1997,  5,446,000  shares of 8% Cumulative  Perpetual  Preferred
Stock (8% preferred stock) were outstanding.  On November 3, 1997, Aon exercised
its option to redeem all of the remaining outstanding shares of its 8% preferred
stock at a redemption price of $25.00 per share plus accrued dividends. The cost
of repurchasing these shares was approximately $136 million,  financed primarily
by short-term borrowings.

Stockholders'  equity  increased $87.6 million in nine months 1997 to $16.60 per
share,  an increase of $0.39 per share since  year-end  1996. In addition to net
income,  which is net of  $107.5  million  of  after-tax  special  charges,  the
principal factor  influencing this increase was net unrealized  investment gains
of $70.7 million.  Partially  offsetting this increase were net foreign exchange
losses of $58.8  million  and  dividends  to  stockholders  of  $168.9  million.
Included in the  reduction  for  dividends is an accrual for the fourth  quarter
1997 common stock dividend.

Review by Independent Auditors

The condensed  consolidated  financial statements at September 30, 1997, and for
the third  quarter  and nine  months  then  ended have been  reviewed,  prior to
filing,  by Ernst & Young LLP, Aon's independent  auditors,  and their report is
included herein.


                                     - 19 -
<PAGE>
INDEPENDENT ACCOUNTANTS' REVIEW REPORT



Board of Directors and Stockholders
Aon Corporation

We have reviewed the accompanying  condensed consolidated statement of financial
position of Aon Corporation as of September 30, 1997, and the related  condensed
consolidated statements of operations for the three-month and nine-month periods
ended September 30, 1997 and 1996, and the condensed consolidated  statements of
cash flows for the nine-month  periods ended September 30, 1997 and 1996.  These
financial statements are the responsibility of the Company's management.

We  conducted  our  reviews in  accordance  with  standards  established  by the
American  Institute  of  Certified  Public  Accountants.  A  review  of  interim
financial  information consists principally of applying analytical procedures to
financial  data, and making  inquiries of persons  responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted in
accordance with generally accepted auditing  standards,  which will be performed
for the full year with the  objective of  expressing  an opinion  regarding  the
financial  statements taken as a whole.  Accordingly,  we do not express such an
opinion.

Based on our reviews, we are not aware of any material modifications that should
be made to the accompanying condensed consolidated financial statements referred
to  above  for  them to be in  conformity  with  generally  accepted  accounting
principles.

We have  previously  audited,  in accordance  with generally  accepted  auditing
standards,  the consolidated  statement of financial position of Aon Corporation
as of December  31, 1996,  and the related  consolidated  statements  of income,
stockholders'  equity,  and cash flows for the year then  ended,  not  presented
herein,  and in our report dated  February 11, 1997, we expressed an unqualified
opinion  on  those  consolidated  financial  statements.  In  our  opinion,  the
information set forth in the accompanying  condensed  consolidated  statement of
financial  position as of December 31, 1996, is fairly  stated,  in all material
respects,  in relation to the consolidated  statement of financial position from
which it has been derived.


                                             ERNST & YOUNG LLP

Chicago, Illinois
November 4, 1997


                                     - 20 -
<PAGE>
                                     PART II

                                OTHER INFORMATION
                                -----------------

ITEM 6.   EXHIBITS AND REPORTS ON FORM 8-K

     (a)  Exhibits  - The  exhibits  filed  with this  report  are listed on the
          --------
          attached Exhibit Index.


     (b)  Reports  on Form 8-K - No  Current  Reports on Form 8-K were filed for
          --------------------
          the quarter ended September 30, 1997.



                                    SIGNATURE

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

                                    Aon Corporation
                                    (Registrant)

November 14, 1997                   /s/ Harvey N. Medvin
                                    --------------------
                                    HARVEY N. MEDVIN
                                    EXECUTIVE VICE PRESIDENT,
                                    CHIEF FINANCIAL OFFICER AND
                                    TREASURER
                                    (Principal Financial and Accounting Officer)


                                     - 21 -
<PAGE>
                                 Aon CORPORATION
                                 ---------------

                                  EXHIBIT INDEX
                                  -------------



Exhibit Number
In Regulation S-K
                                                                            Page
Item 601 Exhibit Table                                                       No.
- ----------------------                                                       ---

(11) Statement regarding Computation of Per Share Earnings.                    

(12) Statements regarding Computation of Ratios.                               

          (a)  Statement  regarding  Computation  of Ratio of  Earnings
               to Fixed Charges.                                               

          (b)  Statement regarding  Computation of Ratio of Earnings to
               Combined Fixed Charges and Preferred Stock Dividends.           

(15) Letter re: Unaudited Interim Financial Information                        

(27) Financial Data Schedule                                                   


                                     - 22 -
<PAGE>

<TABLE>
<CAPTION>
                                                                                              EXHIBIT 11
                        Aon Corporation and Subsidiaries
                  CONSOLIDATED NET INCOME PER SHARE COMPUTATION

(millions except per share data)
                                                           Third Quarter Ended       Nine Months Ended
                                                           --------------------     --------------------
                                                           Sept. 30,  Sept. 30,     Sept. 30,  Sept. 30,
                                                              1997       1996          1997       1996
                                                           ---------  ---------     ---------  ---------
<S>                                                        <C>        <C>           <C>        <C>      
EARNINGS PER SHARE (1)
  Net income ...........................................   $   101.0  $    83.8     $   185.9  $   289.0
  Preferred stock dividends ............................         3.4        5.0          10.1       15.2
                                                           ---------  ---------     ---------  ---------
   Net income available for common stockholders ........   $    97.6  $    78.8     $   175.8  $   273.8
                                                           =========  =========     =========  =========


  Average common shares issued .........................       171.5      167.3         171.5      167.3

  Net effect of treasury stock activity and dilutive stock
   compensation plans based on the treasury stock method        (0.7)      (3.2)         (1.5)      (2.7)
                                                           ---------  ---------     ---------  ---------

   Average common and common equivalent shares
       outstanding .....................................       170.8      164.1         170.0      164.6
                                                           ---------  ---------     ---------  ---------
Net income per share ...................................   $    0.57  $    0.48     $    1.03  $    1.66
                                                           =========  =========     =========  =========

<FN>
(1) Adjusted to reflect the three-for-two stock split on May 14, 1997
</FN>
</TABLE>

<TABLE>
<CAPTION>
                                                                                                 Exhibit 12(a)
                  Aon Corporation and Consolidated Subsidiaries
                    Combined With Unconsolidated Subsidiaries
                Computation of Ratio of Earnings to Fixed Charges


                                             Nine Months
                                            Ended Sept. 30,                Years Ended December 31,
                                           -----------------   -----------------------------------------------
(millions except ratios)                    1997      1996      1996      1995      1994      1993      1992(1)
                                           -------   -------   -------   -------   -------   -------   -------
<S>                                        <C>       <C>       <C>       <C>       <C>       <C>       <C>    
Income from continuing operations
  before provision for income taxes (2)    $ 344.9   $ 374.9   $ 445.6   $ 458.0   $ 397.0   $ 331.6   $ 179.1

Add back fixed charges:

Interest on indebtedness                      49.3      32.9      44.7      55.5      46.4      42.3      41.9

Interest on ESOP                               2.8       3.5       4.3       5.3       5.9       6.5       6.9

Portion of rents representative of
  interest factor                             44.2      20.0      28.6      21.4      28.7      26.1      19.2
                                           -------   -------   -------   -------   -------   -------   -------

Income as adjusted                         $ 441.2   $ 431.3   $ 523.2   $ 540.2   $ 478.0   $ 406.5   $ 247.1
                                           =======   =======   =======   =======   =======   =======   =======

Fixed charges:

Interest on indebtedness                   $  49.3   $  32.9   $  44.7   $  55.5   $  46.4   $  42.3   $  41.9

Interest on ESOP                               2.8       3.5       4.3       5.3       5.9       6.5       6.9

Portion of rents representative of
  interest factor                             44.2      20.0      28.6      21.4      28.7      26.1      19.2
                                           -------   -------   -------   -------   -------   -------   -------

Total fixed charges                        $  96.3   $  56.4   $  77.6   $  82.2   $  81.0   $  74.9   $  68.0
                                           =======   =======   =======   =======   =======   =======   =======

Ratio of earnings to fixed charges             4.6       7.6       6.7       6.6       5.9       5.4       3.6
                                           =======   =======   =======   =======   =======   =======   =======

Ratio of earnings to fixed charges (3)         6.4       8.2       7.9                                     4.9
                                           =======   =======   =======                                 =======

<FN>
(1)  Income  from  continuing  operations  before  provision  for  income  taxes
     excludes the cumulative effect of changes in accounting principles.
(2)  Income from  continuing  operations  before  provision for income taxes and
     minority  interest  includes  special  charges  of $172  million  and $30.2
     million for nine months ended  September 30, 1997 and 1996,   respectively,
     and $90.5  million and $86.5  million in the years ended  December 31, 1996
     and 1992, respectively.
(3)  The  calculation  of this ratio of earnings to fixed  charges  reflects the
     exclusion  of special  charges from the income from  continuing  operations
     before  provision  for income  taxes  component  for the nine months  ended
     September 30, 1997 and 1996, respectively, and the years ended December 31,
     1996 and 1992, respectively.
</FN>
</TABLE>

<TABLE>
<CAPTION>
                                                                                                       Exhibit 12(b)
                  Aon Corporation and Consolidated Subsidiaries
                    Combined With Unconsolidated Subsidiaries
           Computation of Ratio of Earnings to Combined Fixed Charges
                          and Preferred Stock Dividends


                                                    Nine Months
                                                  Ended Sept. 30,                Years Ended December 31,
                                                 -----------------   -----------------------------------------------

(millions except ratios)                          1997      1996      1996      1995      1994      1993      1992(1)
                                                 -------   -------   -------   -------   -------   -------   -------
<S>                                              <C>       <C>       <C>       <C>       <C>       <C>       <C>    
Income from continuing operations
  before provision for income taxes (2)          $ 344.9   $ 374.9   $ 445.6   $ 458.0   $ 397.0   $ 331.6   $ 179.1


Add back fixed charges:

Interest on indebtedness                            49.3      32.9      44.7      55.5      46.4      42.3      41.9

Interest on ESOP                                     2.8       3.5       4.3       5.3       5.9       6.5       6.9

Portion of rents representative of
  interest factor                                   44.2      20.0      28.6      21.4      28.7      26.1      19.2
                                                 -------   -------   -------   -------   -------   -------   -------

Income as adjusted                               $ 441.2   $ 431.3   $ 523.2   $ 540.2   $ 478.0   $ 406.5   $ 247.1
                                                 =======   =======   =======   =======   =======   =======   =======

Fixed charges and preferred stock dividends:

Interest on indebtedness                         $  49.3   $  32.9   $  44.7   $  55.5   $  46.4   $  42.3   $  41.9

Preferred stock dividends                           63.6      23.2      28.7      37.5      48.4      47.5      20.3
                                                 -------   -------   -------   -------   -------   -------   -------

Interest and dividends                             112.9      56.1      73.4      93.0      94.8      89.8      62.2

Interest on ESOP                                     2.8       3.5       4.3       5.3       5.9       6.5       6.9

Portion of rents representative of
  interest factor                                   44.2      20.0      28.6      21.4      28.7      26.1      19.2
                                                 -------   -------   -------   -------   -------   -------   -------

Total fixed charges and preferred
  stock dividends                                $ 159.9   $  79.6   $ 106.3   $ 119.7   $ 129.4   $ 122.4   $  88.3
                                                 =======   =======   =======   =======   =======   =======   =======

Ratio of earnings to combined fixed
  charges and preferred stock dividends (3)          2.8       5.4       4.9       4.5       3.7       3.3       2.8
                                                 =======   =======   =======   =======   =======   =======   =======

Ratio of earnings to combined fixed
  charges and preferred stock dividends (4)          3.8       5.8       5.8                                     3.8
                                                 =======   =======   =======                                 =======

<FN>
(1)  Income  from  continuing  operations  before  provision  for  income  taxes
     excludes the cumulative effect of changes in accounting principles.
(2)  Income from  continuing  operations  before  provision for income taxes and
     minority  interest  includes  special  charges  of $172  million  and $30.2
     million for nine months ended  September 30, 1997 and 1996,   respectively,
     and $90.5  million and $86.5  million in the years ended  December 31, 1996
     and 1992, respectively.
(3)  Included in total fixed charges and preferred  stock dividends for the nine
     months ended  September 30, 1997 are $47.6 million of pretax  distributions
     on the 8.205% trust preferred  capital  securities  which are classified as
     "minority interest" on the condensed consolidated statements of operations.
(4)  The  calculation  of this ratio of earnings to fixed  charges  reflects the
     exclusion  of special  charges from the income from  continuing  operations
     before  provision  for income  taxes  component  for the nine months  ended
     September 30, 1997 and 1996, respectively, and the years ended December 31,
     1996 and 1992, respectively.
</FN>
</TABLE>

                                                                      Exhibit 15




Board of Directors and Stockholders
Aon Corporation


We are aware of the incorporation by reference in the Registration Statements of
Aon  Corporation  ("Aon")  described in the following  table of our report dated
November  4, 1997  relating  to the  unaudited  condensed  consolidated  interim
financial  statements of Aon Corporation  that are included in its Form 10-Q for
the quarter ended September 30, 1997:

Registration Statement
- ----------------------
   Form     Number            Purpose
   ----     ------            -------           

   S-8     33-27984   Pertaining to Aon's savings plan
   S-8     33-42575   Pertaining to Aon's stock award plan and stock option plan
   S-8     33-59037   Pertaining to Aon's stock award plan and stock option plan
   S-3     33-57562   Registration  of Aon's 8% cumulative  perpetual  preferred
                        stock and 6 1/4% cumulative convertible exchangeable 
                        preferred stock
   S-4     333-21237  Offer to exchange Capital Securities of Aon Capital A

Pursuant to Rule 436(c) of the  Securities Act of 1933, our report is not a part
of the registration  statements  prepared or certified by accountants within the
meaning of Section 7 or 11 of the Securities Act of 1933.



                                                  ERNST & YOUNG LLP



Chicago, Illinois
November 4, 1997

<TABLE> <S> <C>

<ARTICLE>                               7
<LEGEND>
     This  schedule  contains  summary  financial   information  extracted  from
     Condensed  Consolidated  Statements  of Financial  Position  and  Condensed
     Consolidated  Statements  of Income and is  qualified  in its  entirety  by
     reference to such financial statements.
</LEGEND>
<MULTIPLIER>                            1,000,000
       
<S>                                     <C>
<PERIOD-TYPE>                                 9-MOS
<FISCAL-YEAR-END>                       DEC-31-1997
<PERIOD-START>                          JAN-01-1997
<PERIOD-END>                            SEP-30-1997
<DEBT-HELD-FOR-SALE>                          3,027
<DEBT-CARRYING-VALUE>                             0
<DEBT-MARKET-VALUE>                               0
<EQUITIES>                                      858
<MORTGAGE>                                       22
<REAL-ESTATE>                                    12
<TOTAL-INVEST>                                5,527
<CASH>                                        1,404
<RECOVER-REINSURE>                                0 <F1>
<DEFERRED-ACQUISITION>                          560
<TOTAL-ASSETS>                               17,832
<POLICY-LOSSES>                               1,083
<UNEARNED-PREMIUMS>                           2,015
<POLICY-OTHER>                                  834
<POLICY-HOLDER-FUNDS>                           695
<NOTES-PAYABLE>                               1,272 <F2>
                            50
                                       6 <F4> <F5>
<COMMON>                                        171 <F3>
<OTHER-SE>                                    2,744
<TOTAL-LIABILITY-AND-EQUITY>                 17,832
                                    1,192
<INVESTMENT-INCOME>                             353
<INVESTMENT-GAINS>                                5
<OTHER-INCOME>                                2,680 <F6>
<BENEFITS>                                      634
<UNDERWRITING-AMORTIZATION>                     159
<UNDERWRITING-OTHER>                          2,921
<INCOME-PRETAX>                                 345
<INCOME-TAX>                                    129
<INCOME-CONTINUING>                             186
<DISCONTINUED>                                    0
<EXTRAORDINARY>                                   0
<CHANGES>                                         0
<NET-INCOME>                                    186
<EPS-PRIMARY>                                  1.03
<EPS-DILUTED>                                  0.00
<RESERVE-OPEN>                                  715
<PROVISION-CURRENT>                               0 <F1>
<PROVISION-PRIOR>                                 0 <F1>
<PAYMENTS-CURRENT>                                0 <F1>
<PAYMENTS-PRIOR>                                  0 <F1>
<RESERVE-CLOSE>                                   0 <F1>
<CUMULATIVE-DEFICIENCY>                           0 <F1>
<FN>
<F1>  Available on an annual basis only.
<F2>  Includes short-term borrowings and debt guarantee of ESOP.
<F3> Common stock at par value; adjusted to reflect three-for-two
         stock split on May 14, 1997.
<F4>  Preferred stock at par value.
<F5>      Does not incude  Company-obligated  Mandatorily  Redeemable  Preferred
          Capital  Securities  of Subsidiary  Trust holding  solely to Company's
          Junior Subordinated Debentures.
<F6>  Includes brokerage commissions and fees  and other income.
</FN>
        

</TABLE>


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