AON CORP
10-K, 1999-03-29
ACCIDENT & HEALTH INSURANCE
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    FORM 10-K

 (Mark One)

  [X]         ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
                   For the fiscal year ended December 31, 1998
                                       OR
  [ ]       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE
                SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
                         Commission File Number: 1-7933
                                 Aon Corporation
             (Exact Name of Registrant as Specified in its Charter)

               DELAWARE
     (State or Other Jurisdiction of                           36-3051915
      Incorporation or Organization)                        (I.R.S. Employer
        123 NORTH WACKER DRIVE,                             Identification No.)
          CHICAGO, ILLINOIS                                       60606
(Address of Principal Executive Offices)                       (Zip Code)
           (312) 701-3000
          (Telephone Number)

           Securities registered pursuant to Section 12(b) of the Act:

                                                      Name of Each Exchange
          Title of Each Class                         on Which Registered
          -------------------                         -------------------

      Common Stock, $1 par value                     New York Stock Exchange*
        6.875% Notes Due 1999                        New York Stock Exchange
        7.40%  Notes Due 2002                        New York Stock Exchange

        Securities registered pursuant to Section 12(g) of the Act: NONE
*The Common  Stock of the  Registrant  is also listed for trading on the Chicago
          Stock Exchange and the International Stock Exchange London.


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

YES [X]         NO [ ]

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of Registrant's knowledge, in definitive proxy or  information  statements,
incorporated  by  reference  in Part III of this  Form  10-K or any amendment to
this Form 10-K. [ ]

Aggregate  market  value  of the  voting  stock  held by  non-affiliates  of the
Registrant as of February 24, 1999 was $8,787,962,898.

Number of shares of $1.00 par value Common Stock outstanding as of February
24, 1999:  170,793,734.

    Documents From Which Information is Incorporated By Reference:  
  Annual Report to Stockholders of the Registrant for the Year 1998
                        (Parts I, II and IV)
  Notice of Annual Meeting of Holders of Common Stock and Series C Preferred 
  Stock and Proxy Statement for Annual Meeting of Stockholders on April 16, 1999
                        of the Registrant (Part III)
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------


<PAGE>
                                     PART I

ITEM 1.  BUSINESS.

      The Registrant is a holding company whose operating  subsidiaries carry on
business in three distinct segments: (i) insurance brokerage and other services,
(ii) consulting,  and (iii) insurance underwriting.  Incorporated in 1979, it is
the parent corporation of long-established and more recently formed companies.

      Aon Group, Inc., its subsidiaries and certain other indirect  subsidiaries
of the Registrant (the "Aon Group") including Aon Risk Services Companies, Inc.;
Aon Holdings bv; Aon Consulting  Worldwide,  Inc.; Aon Services Group, Inc.; Aon
Re Worldwide, Inc.; Aon Group Limited; and Alternative Market Operations ("AMO")
provide reinsurance  intermediary  services,  benefits consulting and commercial
insurance  brokerage  services.  Aon Group revenues grew significantly in fiscal
1996, 1997, and 1998 when the Registrant acquired,  among other companies,  Bain
Hogg  Group plc ("Bain  Hogg") in 1996;  Alexander  &  Alexander  Services  Inc.
("A&A"),  The  Minet  Group,  and  Jauch &  Hubener  in  1997;  and Le  Blanc de
Nicolay, Gil y Carvajal and Auto Insurance Specialists, Inc. in 1998.

      Combined  Insurance Company of America ("Combined  Insurance")  engages in
the  marketing  and  underwriting  of life and  accident  and  health  insurance
products.  Virginia Surety Company,  Inc. and London General  Insurance  Company
Limited offer extended warranty and specialty insurance products.

      In second quarter 1996, the Registrant and Combined  Insurance sold two of
Combined  Insurance's  insurance  subsidiaries,  Union  Fidelity Life  Insurance
Company ("UFLIC") and the Life Insurance Company of Virginia ("LOV").

      The Registrant  hereby  incorporates  by reference  pages 6 through 12 and
pages 17 through 23 of the Annual Report to  Stockholders  of the Registrant for
the Year 1998 ("Annual Report").


COMPETITION AND INDUSTRY POSITION

(1)  INSURANCE BROKERAGE AND OTHER SERVICES

      Aon Group, Inc. ("Aon Group");  Aon Risk Services Companies,  Inc. ("Aon
Risk  Services  Companies");  Aon Holdings bv ("Aon  Holdings");  Aon Services
Group,  Inc. ("Aon Services  Group");  Aon Re Worldwide,  Inc. ("Aon Re"); Aon
Group Limited ("AGL"); Alternative Market Operations ("AMO").

      Aon Group is the holding company for the Registrant's commercial brokerage
and consulting operation.  Aon Group companies have 550 offices around the world
in  approximately  120  countries.  In 1998,  Aon  Group  employed  over  34,000
professionals and support personnel to serve the diverse needs of clients.

      Aon Risk Services Companies'  subsidiaries operate in a highly competitive
industry  and compete  with a large  number of retail  insurance  brokerage  and
agency  firms as well as  individual  brokers  and agents and direct  writers of
insurance  coverage.  Aon Risk  Services  Companies'  subsidiaries  provide risk
management  services,  including insurance  placement,  claims management,  loss
control and  administrative  services.  It has also developed certain specialist
niche  areas  such  as  marine,  aviation,  directors  and  officers  liability,
financial institutions,  construction, energy, media and entertainment. In 1998,
significant  investments  were made in professional  talent,  technology and the
development of  specialized  products and services to meet the evolving needs of
clients.

      Subsidiaries  of Aon Risk  Services  Companies  and Aon  Holdings  operate
through owned offices in North America and Europe,  as well as in South America,
Africa,  Australia and Asia. The acquisitions of A&A and Bain Hogg significantly
augmented  the  Registrant's  presence  in  Latin  America,   Asia,  Africa  and
Australia,  and the acquisitions of Jauch & Hubener, Le Blanc de Nicolay and Gil
y Carvajal strengthened the Registrant's presence throughout Europe.

      Aon Services Group addresses the highly specialized  product  development,
consulting and administrative needs of professional groups,  service businesses,
governments,   health-care  providers  and  commercial  organizations.

                                     - 2 -
<PAGE>
It also provides  underwriting  management  skills,  claims and risk  management
expertise,  and third-party  administration services to insurance companies. Aon
Services  Group  operating  subsidiaries  market and broker both the primary and
reinsurance  risks  of these  programs.  For  individuals  and  businesses,  Aon
Services Group provides affinity products for professional  liability,  life and
personal lines.  The acquisition of The Minet Group by the Registrant  augmented
Aon  Services  Group's  already  strong  expertise in  wholesale  brokerage  and
professional   liability  programs.  The  1998  acquisition  of  Auto  Insurance
Specialists,  Inc., an insurance  broker  specializing  in automobile  insurance
coverages,  gives Aon Services Group a significant  presence in that market with
opportunities for wide geographic application.

      Aon's reinsurance  brokerage  activities are organized under Aon Re in the
United States and AGL in the United Kingdom.  Aon Re is the largest  reinsurance
broker in the world, offering  reinsurance,  analytical services and alternative
risk financing  vehicles.  Aon Re serves the alternative market with reinsurance
placement,   alternative  risk  services,   captive   management   services  and
catastrophe information  forecasting.  AGL is a London-based Lloyd's broker that
places  wholesale  and  reinsurance  business  in the London  and  international
markets and serves the needs of a wide range of clients around the world.

      AMO was  established  by Aon in late  1997 and is a  leading  provider  of
custom-designed  products  and services  which  feature  specialty  underwriting
capabilities  that  produced an annual  premium  volume in excess of $1 billion.
Several  of  AMO's   specialties   include   entertainment,   public   entities,
professional liability,  workers compensation,  and media business and financial
institutions.


(2)  CONSULTING

Aon Consulting Worldwide, Inc. ("Aon Consulting")

      Subsidiaries of Aon Consulting and the European benefits operations of Aon
Holdings  serve the  employee  benefit  needs of clients  around the world.  Aon
Consulting is one of the world's largest  integrated human resources  consulting
organizations.  Focusing on the increasing demand for outsourcing solutions, Aon
Consulting  targets emerging  businesses,  IPOs, recent mergers and acquisitions
and corporations that are reengineering staff functions.

      In the United  States,  the  benefits  environment  continues to change as
companies  look for ways to manage their  benefits  costs while  increasing  the
choices offered to their  employees.  Aon Consulting,  with its expertise in all
areas of benefits and  compensation,  and its access to the  Registrant's  other
subsidiaries,   is   well-positioned   to  serve  this  market.  Aon  Consulting
subsidiaries offer services to clients including  organizational analysis and HR
strategic  planning,  recruitment and selection,  benefits design and management
training and development,  job design and competency modeling;  compensation and
reward systems;  human resources compliance and risk management;  and individual
and organizational  change management.  Benefits issues in foreign countries are
becoming  more  complicated,  and Aon  Holdings  and Aon  Consulting  anticipate
increased  demand for their services in these markets.  In particular,  the 1997
acquisitions of Sodarcan Inc. and Martineau Provencher & Associates strengthened
the Registrant's consulting expertise in Quebec.


                                     - 3 -
<PAGE>
(3)  INSURANCE UNDERWRITING

      Combined Insurance Company of America ("Combined  Insurance");  Combined
Life Insurance Company of New York ("CLICNY");  Virginia Surety Company,  Inc.
("VSC"); London General Insurance Company Limited ("London General");  and Aon
Warranty Group, Inc. ("Aon Warranty").

      The Registrant's insurance underwriting  subsidiaries are part of a highly
competitive industry that serves individual consumers in North America,  Europe,
Latin  America  and the  Pacific by  providing  accident  and  health  coverage,
traditional  life  insurance,   and  extended  warranties  through  distribution
networks most of which are directly owned by the Registrant's subsidiaries.

      The life, accident and health distribution  network encompasses  primarily
the agents of Combined  Insurance and CLICNY (which operates  exclusively in the
State  of New  York).  With  more  than  five  million  policyholders,  Combined
Insurance has more individual  accident  policies in force than any other United
States company.  Combined Insurance,  the Registrant's  principal life, accident
and health insurer,  has a direct sales force of several  thousand career agents
calling on individuals to sell a broad spectrum of accident and health products,
while it is one of the few  companies  with agents that call on customers  every
six  months  to  renew  coverage  and  to  sell  additional  coverage.  Combined
Insurance's  current product portfolio often allows  policyholders the option of
paying  premiums  monthly  through  a  pre-authorized  check  mechanism.   Those
policyholders  are  still  called  on by an  agent to add  additional  coverage.
Combined  Insurance  offers a wide  range  of  accident-only  and  sickness-only
insurance  products,  including  short-term  disability,  cancer  aid,  Medicare
supplement,  disability  income and long-term  care  coverage.  Most of Combined
Insurance's  products are primarily  fixed  indemnity  obligations,  thereby not
subject to escalating  medical  costs.  Combined  Insurance  offers a simplified
accident  and  sickness   long-term   disability  policy.  In  addition  to  its
traditional  business,  Combined Insurance has expanded its product distribution
through payroll deduction,  worksite marketing  programs.  Combined  Insurance's
business is  conducted  by the  Registrant's  operations  in the United  States,
Canada, Latin America, Europe and Asia Pacific.

      Combined  Insurance and CLICNY market whole life products  through  direct
sales career agents in the United States.  Combined  Insurance  ranked among the
top 140 life  insurance  companies  in the United  States in terms of total life
premiums in 1997.

      The  Registrant's  extended  warranty and  specialty  insurance  business,
conducted by VSC subsidiaries in North America,  South America, Asia Pacific and
London General in Europe, is composed  primarily of extended warranty  insurance
products,  professional liability insurance coverages, workers' compensation and
specialty financial institution coverages.  VSC and London General are among the
world's largest  underwriters of consumer  extended  warranties.  The automobile
warranty  products are sold in the United States,  Canada,  the United  Kingdom,
Ireland, France, The Netherlands,  Belgium, Spain, Argentina,  Brazil, Australia
and Japan.  Aon Warranty Group handles the  administration  of certain  extended
warranty  products on  automobiles,  electronic  goods,  personal  computers and
appliances.  It  serves  manufacturers,  distributors  and  retailers  of  major
worldwide consumer product and financial institutions, associations and affinity
groups in North America and in Europe.


                                     - 4 -
<PAGE>
(4)  DISCONTINUED OPERATIONS

      The Life Insurance  Company of Virginia  ("LOV") and Union Fidelity Life
Insurance Company ("UFLIC").

      In April 1996, the Registrant and Combined  Insurance  completed the sales
of Combined Insurance's subsidiaries, LOV and UFLIC. The business written by LOV
primarily included capital  accumulation  products and some other life products.
UFLIC operated in the United States in the highly  competitive  direct  response
life and  health  marketing  segment  of the  industry.  The  Registrant  hereby
incorporates  by  reference  note  3 of  the  Notes  to  Consolidated  Financial
Statements on page 40 of the Annual Report.


     A&A's Discontinued Operations

      The  Registrant  hereby  incorporates  by reference note 3 of the Notes to
Consolidated Financial Statements on page 40 of the Annual Report.


LICENSING AND REGULATION

      Regulatory  authorities  in the states or countries in which the operating
subsidiaries  of Aon Group  conduct  business may require  individual or company
licensing  to act as  brokers,  agents,  third  party  administrators,  managing
general agents,  reinsurance intermediaries or adjusters. Under the laws of most
states  in  the  United  States  and  in  most  foreign  countries,   regulatory
authorities have relatively broad discretion with respect to granting,  renewing
and revoking  brokers' and agents' licenses to transact business in the state or
country.  The manner of operating in  particular  states and  countries may vary
according to the  licensing  requirements  of the  particular  state or country,
which may  require,  among  other  things,  that a firm  operate in the state or
country through a local corporation. In a few states and countries, licenses are
issued only to individual residents or locally-owned  business entities. In such
cases,  Aon Group  subsidiaries  have  arrangements  with  residents or business
entities licensed to act in the state or country.

      Insurance   companies  must  comply  with  laws  and  regulations  of  the
jurisdictions in which they do business. These laws and regulations are designed
to ensure  financial  solvency of  insurance  companies  and to require fair and
adequate  service and  treatment  for  policyholders.  They are  enforced by the
states in the United States, by industry  self-regulating agencies in the United
Kingdom,  and by various  regulatory  agencies  in other  countries  through the
granting  and  revoking  of  licenses  to  do  business,  licensing  of  agents,
monitoring  of  trade  practices,  policy  form  approval,  minimum  loss  ratio
requirements,  limits on premium and commission  rates,  and minimum reserve and
capital requirements. Compliance is monitored by the state insurance departments
through periodic regulatory reporting procedures and periodic examinations.  The
quarterly and annual  financial  reports to the  regulators in the United States
utilize statutory  accounting  principles which are different from the generally
accepted  accounting  principles used in  stockholders'  reports.  The statutory
accounting  principles,  in keeping with the intent to assure the  protection of
policyholders,  are based, in general,  on a liquidation concept while generally
accepted accounting principles are based on a going-concern concept.

      The state insurance  regulators are members of the National Association of
Insurance  Commissioners  ("NAIC"). This Association seeks to promote uniformity
of, and to enhance the state  regulation  of,  insurance.  Both the NAIC and the
individual states continue to focus on the solvency of insurance companies. This
focus is reflected in additional regulatory oversight by the states and emphasis
on the  enactment  or  adoption  of a series of NAIC model laws and  regulations
designed to promote solvency. Any increase in any solvency-related  oversight by
the  states is not  expected  to have any  significant  impact on the  insurance
business of the Registrant.

      Several  years ago, the NAIC  developed a formula for  analyzing  insurers
called  risk-based  capital  ("RBC").  RBC is  intended to  establish  "minimum"
capital  threshold  levels  that  vary  with  the  size  and mix of a  company's
business.  It is designed to identify companies with the capital levels that may
require  regulatory  attention.  RBC does not have any significant impact on the
insurance business of the Registrant.

                                     - 5 -
<PAGE>
      The state  insurance  holding  company  laws  require  prior notice to and
approval of the domestic state insurance department of intracorporate  transfers
of assets  within  the  holding  company  structure,  including  the  payment of
dividends by insurance company  subsidiaries.  In addition,  the premium finance
loans by Cananwill, Inc., an indirect wholly-owned subsidiary of the Registrant,
are subject to one or more of truth-in-lending and credit regulations, insurance
premium finance acts,  retail  installment sales acts and other similar consumer
protection  legislation.  Failure to comply  with such laws or  regulations  can
result in the temporary  suspension or permanent  loss of the right to engage in
business in a particular jurisdiction as well as other penalties.

      In 1996 the federal Health Care Insurance  Portability and  Accountability
Act of 1996 ("HIPPA") was enacted. The Act requires the states to take action to
implement the requirements of the Act or to become subject to federal oversight.
HIPPA  implementation by the states has not materially  affected the business of
the Registrant's  subsidiaries.  In addition, recent federal laws and proposals,
mandating specific  practices by medical insurers,  and the health care industry
will  not,   because  of  the  nature  of  the  business  of  the   Registrant's
subsidiaries,  materially  affect  the  Registrant.  Numerous  states  have  had
legislation introduced to reform the health care system and such legislation has
passed in several states.  While it is impossible to forecast the precise nature
of future federal and state health care changes,  the Registrant does not expect
a major impact on its operations  because of the supplemental  nature of most of
the policies issued by its insurance  subsidiaries and because the coverages are
primarily purchased to provide, on a fixed-indemnity  basis,  protection against
loss-of-time  or  disability  benefits.   Congress  is  actively  considering  a
Financial  Services  Modernization  Act commonly known as H.R.10.  While H.R.10.
would make substantial changes in allowing financial organizations to diversify,
the  Registrant  does not believe the  enactment of H.R.10 would have a material
affect on the business of its insurance institutions.


CLIENTELE

      No significant part of the Registrant's or its  subsidiaries'  business is
dependent upon a single client or on a few clients, the loss of any one of which
would have a material adverse effect on the Registrant.


EMPLOYEES

      The Registrant's  subsidiaries had  approximately  44,000 employees at the
end of 1998 of whom  approximately  36,000 are salaried and hourly employees and
the remaining  8,000 are sales  representatives  who are  generally  compensated
wholly or primarily by commission.


ITEM 2.  PROPERTIES.

      The  Registrant's  subsidiaries  own and occupy office  buildings in seven
states and certain  foreign  countries,  and lease office space elsewhere in the
United  States and in various  foreign  cities.  Loss of the use of any owned or
leased property, while potentially disruptive,  would have no material impact on
the Registrant.


                                     - 6 -
<PAGE>
ITEM 3.  LEGAL PROCEEDINGS.

      The Registrant  hereby  incorporates  by reference note 12 of the Notes to
Consolidated Financial Statements on page 50 of the Annual Report.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

         None.

EXECUTIVE OFFICERS OF THE REGISTRANT

      Executive officers of the Registrant are regularly elected by its Board of
Directors at the annual meeting of the Board which is held following each annual
meeting of the  stockholders  of the Registrant.  The executive  officers of the
Registrant  were elected to their  current  positions on April 17, 1998 to serve
until the meeting of the Board  following the annual meeting of  stockholders on
April 16, 1999. Ages shown are as of December 31, 1998.

      For information concerning certain directors and executive officers of the
Registrant,  see item 10 below. As of March 31, 1999, the following  individuals
are also executive officers of the Registrant as defined in Rule 16a-1(f):

                                 Has
                             Continuously
                             Served as an
                               Officer
                           of Registrant or
      Name, Age, and        One or More of
      Current Office       its Subsidiaries          Business Experience
  or Principal Position         Since                   Past 5 years
  ---------------------         -----                   ------------

Harvey N. Medvin, 62             1972       Mr. Medvin became Vice President and
Executive  Vice  President and              Chief Financial Officer of the  
Chief Financial Officer                     Registrant in 1982 and was elected 
                                            to his  current  position in 1987.  
                                            He also  serves as a Director or 
                                            Officer of certain of the 
                                            Registrant's subsidiaries.

Daniel T. Cox, 52                1986       Mr. Cox was  elected  to his current
Executive Vice President                    position in 1991 and, prior to their
                                            sale in 1996, had served as Chairman
                                            and  Chief Executive Officer of 
                                            certain of the Registrant's  
                                            underwriting  subsidiaries.  Mr. Cox
                                            has headed the Registrant's benefits
                                            consulting operation since 1987.  He
                                            also serves as Director or Officer 
                                            of certain of the Registrant's 
                                            subsidiaries.

Michael A. Conway, 51            1990       Mr.  Conway  was  Vice  President of
Senior Vice President and                   Combined Insurance from 1980 to 
Senior Investment Officer                   1984. Following other employment, 
                                            Mr. Conway rejoined the Registrant 
                                            in 1990 as Senior Vice President of 
                                            Combined Insurance and was elected 
                                            to his current position in 1991. He 
                                            also serves as Director or Officer 
                                            of certain of the Registrant's 
                                            subsidiaries.

Michael D. O'Halleran, 48        1987       Mr. O'Halleran was appointed
President and Chief Operating               President and Chief Operating 
Officer of Aon Group, Inc.                  Officer of Aon Group, Inc. in 1995.
                                            Prior thereto, since joining the 
                                            Registrant in 1987, he held a 
                                            variety of senior positions in the 
                                            Registrant's insurance and 
                                            reinsurance brokerage operations. He
                                            also serves as a Director or Officer
                                            of certain of the Registrant's 
                                            subsidiaries.


                                     - 7 -
<PAGE>
                                     PART II


ITEM 5.  MARKET FOR THE  REGISTRANT'S  COMMON STOCK AND RELATED SECURITY HOLDER
         MATTERS.

      The  Registrant's  $1.00 par value  common  shares  ("Common  Shares") are
traded on the New York,  Chicago  and London  stock  exchanges.  The  Registrant
hereby  incorporates  by  reference  the  "Dividends  paid per share" and "Price
range" data on page 53 of the Annual Report.

      The  Registrant had  approximately  13,300 holders of record of its Common
Shares as of February 24, 1999.

      The  Registrant  hereby  incorporates  by reference note 8 of the Notes to
Consolidated Financial Statements on pages 43 and 44 of the Annual Report.


ITEM 6.  SELECTED FINANCIAL DATA.

      The Registrant  hereby  incorporates by reference the "Selected  Financial
Data" table on page 52 of the Annual Report.


ITEM 7.  MANAGEMENT'S  DISCUSSION  AND  ANALYSIS OF  FINANCIAL  CONDITION  AND
         RESULTS OF OPERATIONS.

      The Registrant hereby incorporates by reference  "Financial and Operations
Highlights -  Management's  Discussion  and Analysis" on pages 14 through 30 and
"Information Concerning Forward-Looking  Statements" on the inside back cover of
the Annual Report.


ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

      The Registrant hereby  incorporates by reference "Market Risk Exposure" on
page 29 of the Annual Report.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

      The Registrant hereby incorporates by reference the following  statements,
notes and data from the Annual Report.
                                                                      Page(s)
                                                                      -------
            Consolidated Financial Statements ......................  31 - 35
            Notes to  Consolidated  Financial  Statements ..........  36 - 50
            Report of Ernst & Young LLP, Independent Auditors ......     51
            Quarterly  Financial  Data .............................     53


ITEM 9.  CHANGES  IN AND  DISAGREEMENT  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
         FINANCIAL DISCLOSURE.

         Not Applicable.


                                     - 8 -
<PAGE>
                                    PART III


ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

      The Registrant hereby incorporates by reference the information on pages 3
and 7 of the Proxy Statement For Annual Meeting of the Stockholders on April 16,
1999, of the Registrant ("Proxy  Statement")  concerning the following Directors
of the  Registrant,  each of whom also  serves as an  executive  officer  of the
Registrant as defined in Rule 16a-1(f): Patrick G. Ryan and Raymond I. Skilling.
Information  concerning  additional  executive  officers  of the  Registrant  is
contained in Part I hereof, pursuant to General Instruction G(3) and Instruction
3 to Item 401(b) of Regulation S-K. The Registrant  also hereby  incorporates by
reference the information on pages 10 through 12 of the Proxy Statement.


ITEM 11.  EXECUTIVE COMPENSATION

      The Registrant hereby  incorporates by reference the information under the
headings "Executive  Compensation,"  "Aggregated Option Exercises in Last Fiscal
Year and Fiscal Year-End Option Values," "Option Grants in 1998 Fiscal Year" and
"Pension Plan Table" on pages 14 through 16 of the Proxy Statement.


ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

      The Registrant  hereby  incorporates by reference the share ownership data
contained on pages 2, 9 and 10 of the Proxy Statement.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

      The Registrant hereby  incorporates by reference the information under the
heading "Transactions With Management" on page 21 of the Proxy Statement.


                                     - 9 -
<PAGE>
                                     PART IV


ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

(a) (1) and (2). The  Registrant has  incorporated  by reference from the Annual
Report  (see Item 8) the  following  consolidated  financial  statements  of the
Registrant and subsidiaries:

                                                                         Annual
                                                                         Report
                                                                         Page(s)
                                                                         -------

Consolidated Statements of Income - Years Ended December 31, 1998,
     1997 and 1996                                                         31

Consolidated Statements of Financial Position - As of December 31,
     1998 and 1997                                                        32-33

Consolidated Statements of Stockholders' Equity - Years Ended 
     December 31, 1998, 1997 and 1996                                      34

Consolidated Statements of Cash Flows - Years Ended December 31,
     1998, 1997 and 1996                                                   35

Notes to Consolidated Financial Statements                                36-50

Report of Ernst & Young LLP, Independent Auditors                          51

Financial  statement  schedules of the Registrant and 
     consolidated subsidiaries not included in the Annual Report
     but filed herewith: 

          Consolidated Financial Statement Schedules -

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

                                                                        Schedule
                                                                        --------
     Condensed Financial Information of Registrant                          I
     Valuation and Qualifying Accounts                                     II

All other schedules for Aon Corporation and Subsidiaries have been omitted since
the  required  information  is not  present  in  amounts  sufficient  to require
submission of the schedules or because the  information  required is included in
the   respective   financial   statements  or  notes   thereto.   The  following
supplementary  schedules have been provided for Aon Corporation and Subsidiaries
as they relate to the insurance underwriting operations:


                                                                        Schedule
                                                                        --------
     Summary of Investments Other than Investments in Related Parties     II.1
     Reinsurance                                                          II.2


(a)(3).  EXHIBITS

      (a)   Second  Restated  Certificate  of  Incorporation of the Registrant -
            incorporated by reference to Exhibit 3(a) to the Registrant's Annual
            Report to the  Securities  and Exchange  Commission on Form 10-K for
            the year ended December 31, 1991 (the "1991 Form 10-K").

      (b)   Certificate  of  Amendment  of  the  Registrant's   Second  Restated
            Certificate of  Incorporation - incorporated by reference to Exhibit
            3 to the Registrant's  Quarterly Report on Form 10-Q for the quarter
            ended March 31, 1994 (the "First Quarter 1994 Form 10-Q").

                                     - 10 -
<PAGE>
      (c)   Bylaws of the Registrant - incorporated  by reference to Exhibit (d)
            to the  Registrant's  Annual Report to the  Securities  and Exchange
            Commission  on Form 10-K for the year ended  December  31, 1982 (the
            "1982 Form 10-K").

      (d)   Indenture  dated  September  15,  1992  between the  Registrant  and
            Continental   Bank   Corporation  (now  known  as  Bank  of  America
            Illinois), as Trustee - incorporated by reference to Exhibit 4(a) to
            the  Registrant's  Current  Report on Form 8-K dated  September  23,
            1992.

      (e)   Resolutions  establishing  terms of 6.875%  Notes Due 1999 and 7.40%
            Notes Due 2002 -  incorporated  by reference to Exhibits 4(d) to the
            Registrant's Annual Report to the Securities and Exchange Commission
            on Form 10-K for the year ended  December  31,  1992 (the "1992 Form
            10-K").

      (f)   Resolutions establishing the terms of 6.70% Notes Due 2003 and 6.30%
            Notes Due 2004  incorporated  by reference to Exhibits 4(c) and 4(d)
            of the  Registrant's  Annual Report to the  Securities  and Exchange
            Commission  on Form 10-K for the year ended  December  31, 1993 (the
            "1993 Form 10-K").

      (g)   Junior  Subordinated  Indenture dated as of January 13, 1997 between
            the  Registrant  and The Bank of New York, as trustee - incorporated
            by reference to Exhibit 4.1 of the  Registrant's  Amendment No. 1 to
            Registration  Statement  on Form S-4 No.  333-21237  dated March 27,
            1997 (the "Capital Securities Registration").

      (h)   First  Supplemental  Indenture  dated as of January 13, 1997 between
            the  Registrant  and the Bank of New York, as trustee - incorporated
            by reference to Exhibit 4.2 of the Capital Securities Registration.

      (i)   Certificate of Trust of Aon Capital A - incorporated by reference to
            Exhibit 4.3 of the Capital Securities Registration.

      (j)   Amended and  Restated  Trust  Agreement of Aon Capital A dated as of
            January 13, 1997 among the Registrant, as Depositor, The Bank of New
            York,  as  Property  Trustee,  The Bank of New York  (Delaware),  as
            Delaware Trustee, the Administrative  Trustees named therein and the
            holders, from time to time, of the Capital Securities - incorporated
            by reference to Exhibit 4.5 of the Capital Securities Registration.

      (k)   Capital Securities  Guarantee Agreement dated as of January 13, 1997
            between  the  Registrant  and the  Bank of New  York,  as  guarantee
            trustee -  incorporated  by  reference to Exhibit 4.8 of the Capital
            Securities Registration.

      (l)   Capital Securities  Exchange and Registration Rights Agreement dated
            as of January  13,  1997  among the  Registrant,  Aon  Capital A and
            Morgan  Stanley  & Co.  Incorporated  and  Goldman,  Sachs  & Co.  -
            incorporated by reference to Exhibit 4.10 of the Capital  Securities
            Registration.

      (m)   Debenture  Exchange and  Registration  Rights  Agreement dated as of
            January  13,  1997 among the  Registrant,  Aon  Capital A and Morgan
            Stanley & Co. Incorporated and Goldman, Sachs & Co.- incorporated by
            reference to Exhibit 4.11 of the Capital Securities Registration.

      (n)   Guarantee  Exchange and  Registration  Rights  Agreement dated as of
            January  13,  1997 among the  Registrant,  Aon  Capital A and Morgan
            Stanley & Co. Incorporated and Goldman, Sachs & Co.- incorporated by
            reference to Exhibit 4.12 of the Capital Securities Registration.

      (o)   Certificate of Designation for the Registrant's  Series C Cumulative
            Preferred  Stock -  incorporated  by reference to Exhibit 4.1 to the
            Registrant's Current Report on Form 8-K dated February 9, 1994.

                                     - 11 -
<PAGE>
      (p)   Registration  Rights Agreement dated November 2, 1992 by and between
            the  Registrant  and  Frank  B.  Hall & Co.,  Inc.  incorporated  by
            reference to Exhibit 4(c) to the Third Quarter 1992 Form 10-Q.

      (q)   Registration  rights  agreement  by and  among  the  Registrant  and
            certain affiliates of Ryan Insurance Group, Inc.  (including Patrick
            G. Ryan and  Andrew J.  McKenna)  -  incorporated  by  reference  to
            Exhibit (f) to the 1982 Form 10-K.

      (r)   Deferred  Compensation  Agreement  by and among the  Registrant  and
            Registrant's  directors who are not salaried employees of Registrant
            or  Registrant's  affiliates - incorporated  by reference to Exhibit
            10(i)  to the  Registrant's  Annual  Report  to the  Securities  and
            Exchange  Commission  on Form 10-K for the year ended  December  31,
            1987 (the "1987 Form 10-K").

      (s)   Amendment  and Waiver  Agreement  dated as of November 4, 1991 among
            the  Registrant  and each of  Patrick G. Ryan,  Shirley  Ryan,  Ryan
            Enterprises  Corporation  and  Harvey N.  Medvin -  incorporated  by
            reference to Exhibit 10(j) to the 1991 Form 10-K.

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

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

      (v)   Aon  Corporation  1994 Amended and Restated  Outside  Director Stock
            Award Plan - incorporated by reference to Exhibit 10(b) to the First
            Quarter 1994 Form 10-Q.

      (w)   Annual Report to  Stockholders  of the Registrant for the year ended
            December  31,  1998 (for  information,  and not to be deemed  filed,
            except for those  portions  specifically  incorporated  by reference
            herein).

      (x)   List of Subsidiaries of the Registrant.

      (y)   Consent of Ernst & Young LLP to the  incorporation by reference into
            Aon's Annual Report on Form 10-K of its report  included in the 1998
            Annual Report to Stockholders and into Aon's Registration  Statement
            Nos.   33-27984,   33-42575,   33-59037,  333-21237,  333-50607  and
            333-55773.

      (z)   Annual Report to the Securities and Exchange Commission on Form 11-K
            for the Aon Savings  Plan for the year ended  December 31, 1998 - to
            be filed by amendment as provided in Rule 15d- 21(b).

      (aa)  Executive Compensation Plans and Arrangements:

            (A)   Aon Stock Option Plan (as amended and restated through 1997) -
                  incorporated   by   reference   to   Exhibit  10  (a)  to  the
                  Registrant's  Quarterly  Report to the Securities and Exchange
                  Commission  on Form 10-Q for the Quarter  ended March 31, 1997
                  (the "First Quarter 1997 Form 10-Q").

            (B)   Aon Stock Award Plan (as amended and restated  through 1997) -
                  incorporated  by  reference  to  Exhibit  10(b)  to the  First
                  Quarter 1997 Form 10-Q.

            (C)   Aon  Corporation  1995 Senior Officer  Incentive  Compensation
                  Plan  incorporated  by  reference  to  Exhibit  10(p)  to  the
                  Registrant's  Annual  Report to the  Securities  and  Exchange
                  Commission  on Form 10-K for the year ended  December 31, 1995
                  (the "1995 Form 10-K").

            (D)   Aon Deferred  Compensation Plan and First Amendment to the Aon
                  Deferred  Compensation  Plan -  incorporated  by  reference to
                  Exhibit 10(q) of the 1995 Form 10-K.

                                     - 12 -
<PAGE>
            (E)   Employment  Agreement  dated  June 1,  1993 by and  among  the
                  Registrant, Aon Risk Services, Inc. and Michael D. O'Halleran.

            (F)   Aon Severance Plan -  incorporated  by reference to Exhibit 10
                  to the  Registrant's  Quarterly  Report to the  Securities and
                  Exchange  Commission  and Form 10-Q for the quarter ended June
                  30, 1997.

      (ab)  Asset Purchase  Agreement dated July 24, 1992 between the Registrant
            and Frank B. Hall & Co. Inc. - incorporated  by reference to Exhibit
            10(c) to the  Registrant's  Quarterly  Report  on Form 10-Q  for the
            period ended June 30, 1992.

      (ac)  Stock  Purchase  Agreement  by and  among the  Registrant,  Combined
            Insurance Company of America,  Union Fidelity Life Insurance Company
            and General  Electric Capital  Corporation  dated as of November 11,
            1995 -  incorporated  by reference to Exhibit 10(s) of the 1995 Form
            10-K.

      (ad)  Stock  Purchase  Agreement  by and  among the  Registrant;  Combined
            Insurance  Company  of  America;   The  Life  Insurance  Company  of
            Virginia; Forth Financial Resources,  Ltd.; Newco Properties,  Inc.;
            and General  Electric Capital  Corporation  dated as of December 22,
            1995 -  incorporated  by reference to Exhibit 10(t) of the 1995 Form
            10-K.

      (ae)  Agreement  and  Plan of  Merger  among  the  Registrant;  Subsidiary
            Corporation, Inc. ("Purchaser");  and Alexander & Alexander Services
            Inc.  ("A&A")  dated  as of  December  11,  1996 -  incorporated  by
            reference  to  Exhibit  (c)(1)  of  the  Registrant's  Tender  Offer
            Statement  on  Schedule  14D-1  filed  by the  Registrant  with  the
            Securities and Exchange Commission ("SEC") on December 16, 1996 (the
            "Schedule 14D-1").

      (af)  First Amendment to Agreement and Plan of Merger, dated as of January
            7, 1997,  among the  Registrant,  Purchaser and A&A  incorporated by
            reference  to  Exhibit  (c)(3) to the  Schedule  14D-1  filed by the
            Registrant with the SEC on January 9, 1997.

(b) Reports on Form 8-K.

            The Registrant  filed no Current Reports on Form 8-K during the last
            quarter of the Registrant's year ended December 31, 1998.


                                     - 13 -
<PAGE>
                                   SIGNATURES


      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the  undersigned,  thereunto duly  authorized,  on the 24th day of
March, 1999.

                                                Aon Corporation



                                                By:/s/ PATRICK G. RYAN          
                                                   -----------------------------
                                                   Patrick G. Ryan,
                                                   Chairman, President
                                                   and Chief Executive Officer


      Pursuant to the requirements of the Securities  Exchange Act of 1934, this
Report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant and in the capacities and on the dates indicated.

         Signature                    Title                          Date
         ---------                    -----                          ----

  /s/ PATRICK G. RYAN          Chairman, President, Chief         March 24, 1999
- - - - - - - - - - - - - - - - - --------------------------     Executive Officer and Director
      Patrick G. Ryan          (Principal Executive Officer)



 /s/ DANIEL T. CARROLL                Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
     Daniel T. Carroll


    /s/FRANKLIN A. COLE               Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
       Franklin A. Cole


   /s/EDGAR D. JANNOTTA               Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Edgar D. Jannotta


   /s/PERRY J. LEWIS                  Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Perry J. Lewis


   /s/ANDREW J. McKENNA               Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
     Andrew J. McKenna


    /s/NEWTON N. MINOW                Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Newton N. Minow


  /s/RICHARD C. NOTEBAERT             Director                    March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
   Richard C. Notebaert


                                     - 14 -
<PAGE>
         Signature                    Title                          Date
         ---------                    -----                          ----


   /s/DONALD S. PERKINS              Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
     Donald S. Perkins


  /s/JOHN W. ROGERS, JR.             Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
    John W. Rogers, Jr.


   /s/GEORGE A. SCHAEFER             Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
    George A. Schaefer


  /s/RAYMOND I. SKILLING             Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
    Raymond I. Skilling


     /s/FRED L. TURNER               Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Fred L. Turner


    /s/ARNOLD R. WEBER               Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Arnold R. Weber


     /s/CAROLYN Y. WOO               Director                     March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------
      Carolyn Y. Woo


    /s/HARVEY N. MEDVIN         Executive Vice President          March 24, 1999
- - - - - - - - - - - - - - - - - ----------------------------   and Chief Financial Officer
     Harvey N. Medvin           (Principal Financial and
                                   Accounting Officer)


                                     - 15 -
<PAGE>
                                                                      SCHEDULE I
<TABLE>
<CAPTION>

                                 Aon Corporation
                                (Parent Company)
                    CONDENSED STATEMENTS OF FINANCIAL POSITION


                                                             As of December 31
                                                       ---------------------------
 (millions)                                                1998            1997
                                                       -----------     -----------
<S>                                                     <C>             <C>      
 ASSETS
       Investments in subsidiaries ...................  $ 5,305.4       $ 4,667.8
       Notes receivable - subsidiaries ...............      239.0           745.3
       Cash and cash equivalents .....................        5.5             9.5
       Other assets ..................................       46.1           166.2
                                                       -----------     -----------
            TOTAL ASSETS .............................  $ 5,596.0       $ 5,588.8
                                                       ===========     ===========

 LIABILITIES AND STOCKHOLDERS' EQUITY              

       LIABILITIES                                 
       Short-term borrowings .........................  $   436.2       $   764.2
       6.3% long-term debt securities ................       99.8            99.8
       7.4% long-term debt securities ................       99.9            99.9
       6.875% long-term debt securities ..............      100.0            99.9
       6.7% long-term debt securities ................      149.8           149.7
       Subordinated debt .............................      800.0           800.0
       Notes payable - subsidiaries ..................      588.1           488.8
       Notes payable - other .........................       70.0            70.0
       Debt guarantee of employee stock ownership plan       17.5            33.1
       Accrued expenses and other liabilities ........      168.0           111.3
                                                       -----------     -----------
            Total Liabilities ........................    2,529.3         2,716.7
                                                       -----------     -----------

       Redeemable Preferred Stock ....................       50.0            50.0

       STOCKHOLDERS' EQUITY .......................
       Common stock ..................................      171.5           171.5
       Paid-in additional capital ....................      450.4           377.0
       Accumulated other comprehensive income (loss) .     (116.1)          103.4
       Retained earnings .............................    2,782.0         2,463.4
       Less treasury stock at cost ...................      (58.5)          (93.2)
       Less deferred compensation ....................     (212.6)         (200.0)
                                                       -----------     -----------
            Total Stockholders' Equity ...............    3,016.7         2,822.1
                                                       -----------     -----------
            TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY  $ 5,596.0       $ 5,588.8
                                                       ===========     ===========
<FN>
See notes to condensed financial statements.
</FN>
</TABLE>

                                     - 16 -
<PAGE>
                                                                      SCHEDULE I
                                                                     (Continued)
<TABLE>
<CAPTION>

                                 Aon Corporation
                                (Parent Company)
                         CONDENSED STATEMENTS OF INCOME


                                                              Years ended December 31
                                                         ----------------------------------
(millions)                                                  1998         1997        1996
                                                         ---------   ----------  ----------
<S>                                                       <C>          <C>       <C>      
 REVENUE
       Dividends from subsidiaries ...................   $  351.2     $  179.6   $ 1,026.6
       Other investment income .......................       68.5         51.8        33.1
                                                         ----------------------------------
            TOTAL REVENUE ............................      419.7        231.4     1,059.7
                                                         ----------------------------------

 EXPENSES
       Operating and administrative ..................       20.0          6.3         5.7
       Interest - subsidiaries .......................       94.2         85.3        20.6
       Interest - other ..............................       75.6         61.7        43.2
                                                         ----------------------------------
            TOTAL EXPENSES (1) .......................      189.8        153.3        69.5
                                                         ----------------------------------


 INCOME BEFORE INCOME TAXES AND EQUITY IN                                        
       UNDISTRIBUTED INCOME OF SUBSIDIARIES ..........      229.9         78.1       990.2

 Income tax benefit ..................................       53.9         43.0         3.6
                                                         ----------------------------------
                                                            283.8        121.1       993.8

 EQUITY IN UNDISTRIBUTED INCOME OF SUBSIDIARIES ......      256.7        177.7      (658.6)
                                                         ----------------------------------

       NET INCOME ....................................   $  540.5     $  298.8   $   335.2
                                                         ==================================
<FN>
See notes to condensed financial statements.

(1)   Interest  expense - other  allocated  to  discontinued  operations  was $5
      million for the year ended December 31, 1996.
</FN>
</TABLE>

                                     - 17 -
<PAGE>
                                                                      SCHEDULE I
                                                                     (Continued)
<TABLE>
<CAPTION>

                                 Aon Corporation
                                (Parent Company)
                       CONDENSED STATEMENTS OF CASH FLOWS


                                                                Years Ended December 31
                                                            -------------------------------
 (millions)                                                    1998       1997       1996
                                                            ---------  ---------  ---------
<S>                                                         <C>        <C>        <C>     
 CASH FLOWS FROM OPERATING ACTIVITIES ....................  $  445.5   $  124.3   $1,016.9


 CASH FLOWS FROM INVESTING ACTIVITIES:                                          
     Investments in subsidiaries .........................     (93.3)  (1,354.8)    (319.3)
     Notes receivables from subsidiaries .................     (16.3)    (135.2)     (10.8)
                                                            ---------  ---------  ---------
          Cash Used by Investing Activities ..............    (109.6)  (1,490.0)    (330.1)
                                                            ---------  ---------  ---------


 CASH FLOWS FROM FINANCING ACTIVITIES:                                          
     Treasury stock transactions - net ...................     (18.4)      21.4      (40.1)
     Issuance (repayment) of short-term borrowings - net .    (328.1)     541.7     (139.2)
     Issuance of  company-obligated mandatorily redeemable
          preferred capital securities of subsidiary trust         -      800.0          -
     Issuance (repayment) of notes payable and long-term
          debt - net .....................................     200.3      113.5     (105.6)
     Retirement of preferred stock .......................         -     (136.2)     (14.2)
     Cash dividends to stockholders ......................    (193.7)    (182.1)    (172.9)
                                                            ---------  ---------  ---------
          CASH PROVIDED (USED) BY FINANCING ACTIVITIES ...    (339.9)   1,158.3     (472.0)
                                                            ---------  ---------  ---------


 INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS ........      (4.0)    (207.4)     214.8
 CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR ..........       9.5      216.9        2.1
                                                            ---------  ---------  ---------
 CASH AND CASH EQUIVALENTS AT END OF YEAR ................  $    5.5   $    9.5   $  216.9
                                                            =========  =========  =========
<FN>
See notes to condensed financial statements.
</FN>
</TABLE>

                                     - 18 -
<PAGE>

                                                                      SCHEDULE I
                                                                     (Continued)

                                 Aon Corporation
                                (Parent Company)
                     NOTES TO CONDENSED FINANCIAL STATEMENTS



(1)   See notes to consolidated  financial statements  incorporated by reference
      from  the  Annual  Report.  Certain  amounts  in  prior  years'  Condensed
      Statements  of  Income have  been  reclassified  to  conform  to  the 1998
      presentation.

(2)   Generally,  the net assets of Aon's insurance  subsidiaries  available for
      transfer  to the  parent  company  are  limited  to the  amounts  that the
      insurance  subsidiaries'  statutory  net assets exceed  minimum  statutory
      capital  requirements;  however,  payments of the amounts as  dividends in
      excess  of  $292  million  may  be  subject  to  approval  by   regulatory
      authorities.

(3)   Subsidiary Guarantees
      ---------------------
      In 1998,  Aon  guaranteed  a committed  bank credit  facility  under which
      certain  European  subsidiaries  can  borrow up to EUR 400  million  ($470
      million).  At December 31, 1998,  loans of EUR 348 million ($408  million)
      were outstanding under this facility.

      Aon Financial  Products,  Inc. ("AFP"), an investment banking affiliate of
      Aon Corporation ("Aon"),  manages an $80 million investment portfolio held
      in a collateral trust at Citibank related to catastrophe reinsurance notes
      issued by Pacific Re, Ltd., a Cayman  Islands based  reinsurance  company.
      AFP is obligated to produce specified investment returns for the portfolio
      and to back the losses  produced in the  portfolio.  Aon  Corporation  has
      unconditionally guaranteed the obligations of Aon Financial Products.

(4)   During 1998, Aon Corporation (Parent Company) reclassified $523 million of
      notes  receivables-subsidiaries  to investments in subsidiaries related to
      its brokerage operations.

(5)   Subsequent Event
      ----------------
      On March 19, 1999, Aon's directors  approved a three-for-two  stock split,
      payable  on May 17,  1999 in the form of a stock  dividend  of one  common
      share for every two shares held, to stockholders of record as of the close
      of  business  on May  4,  1999.  Because  the  stock  split  was  approved
      subsequent   to  the   distribution   of  Aon's  1998  Annual   Report  to
      Stockholders,  references  to common  stock and earnings per share data in
      the Annual Report to  Stockholders  and in this Annual Report on Form 10-K
      have  not  been  retroactively  adjusted.   Retroactively  adjusting  such
      information  to give  effect to the stock  split for 1998,  1997 and 1996,
      respectively,  would  result in  dilutive  net  income per share of $2.07,
      $1.12, and $1.27, basic net income per share of $2.11, $1.14 and $1.29 and
      dividends per share of $0.73, $0.68 and $0.63.

                                     - 19 -
<PAGE>
                                                                     SCHEDULE II


<TABLE>
<CAPTION>
                                                   Aon CORPORATION
                                          VALUATION AND QUALIFYING ACCOUNTS
                                    Years Ended December 31, 1998, 1997, and 1996


 (millions)                                                                  Additions
                                                                      -----------------------
                                                                                   Charged/
                                                           Balance at  Charged to  (credited)               Balance
                                                           beginning   cost and    to other     Deductions   at end
 Description                                               of year     expenses    accounts       (1)       of year
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------  ----------  -----------  ----------  ----------
<S>                                                           <C>           <C>       <C>            <C>       <C>  
 YEAR ENDED DECEMBER 31, 1998
 ----------------------------
   Reserve for losses (3)
   (deducted from mortgage loans on real estate)             $  0.3      $    -      $  (0.1)    $     -      $  0.2

   Reserve for losses (3)
   (deducted from other long-term investments)                  8.7           -          0.5           -         9.2

   Allowance for doubtful accounts (4)
   (deducted from insurance brokerage and consulting
     receivables)                                              81.5        20.5         (5.1)       (3.4)       93.5

   Allowance for doubtful accounts
   (deducted from premiums and other)                           5.0         0.4          0.1           -         5.5

 YEAR ENDED DECEMBER 31, 1997
 ----------------------------
   Reserve for losses (3)
   (deducted from mortgage loans on real estate)             $  0.7      $    -      $  (0.4)    $     -      $  0.3

   Reserve for losses (3)
   (deducted from other long-term investments)                  5.2           -          3.5           -         8.7     

   Allowance for doubtful accounts (4)
   (deducted from insurance brokerage and consulting
     receivables)                                              59.9         9.3         26.7       (14.4)       81.5

   Allowance for doubtful accounts
   (deducted from premiums and other)                           3.1         2.2            -        (0.3)        5.0


 YEAR ENDED DECEMBER 31, 1996
 ----------------------------
   Reserve for losses (2)
   (deducted from mortgage loans on real estate)             $ 25.6      $    -      $ (24.9)    $     -      $  0.7

   Reserve for losses
   (deducted from other long-term investments)                  5.2           -            -           -         5.2     

   Allowance for doubtful accounts (4)
   (deducted from insurance brokerage and consulting
     receivables)                                              47.4         9.5         13.4       (10.4)       59.9

   Allowance for doubtful accounts (2)
   (deducted from premiums and other)                           3.9         2.1         (2.9)          -         3.1     

<FN>
(1)   Amounts deemed to be uncollectible.
(2)   Amounts shown in additions credited to other accounts primarily  represent
      reductions due to sale of discontinued operations.
(3)   Amounts shown in additions  charged/(credited) to other accounts represent
      income (losses) on disposals.
(4)   Amounts shown in additions  charged/(credited) to other accounts represent
      reserves related to acquired business.
</FN>
</TABLE>

                                     - 20 -
<PAGE>
                                                                  SCHEDULE  II.1


<TABLE>
<CAPTION>
                              Aon Corporation and Subsidiaries
                            CONSOLIDATED SUMMARY OF INVESTMENTS -
                          OTHER THAN INVESTMENTS IN RELATED PARTIES
                                   AS OF DECEMBER 31, 1998

                                                                              Amount shown
                                                                              in Statement
                                                   Amortized       Fair       of Financial
 (millions)                                        Cost or Cost    Value       Position
                                                  ------------  -----------  -------------
<S>                                                <C>                          <C>      
 FIXED MATURITIES - AVAILABLE FOR SALE:
     U.S. government and agencies ................  $    95.5     $   101.0     $   101.0
     States and political subdivisions ...........      485.2         517.4         517.4
     Debt securities of foreign governments                                  
          not classified as loans ................      740.1         801.2         801.2
     Corporate securities ........................    1,534.0       1,539.0       1,539.0
     Public utilities ............................       62.0          64.8          64.8
     Mortgage-backed securities ..................       25.0          26.0          26.0
     Other fixed maturities ......................       53.3          53.5          53.5
                                                   -----------   -----------   -----------
          Total fixed maturities .................    2,995.1       3,102.9       3,102.9
                                                   -----------   -----------   -----------

 EQUITY SECURITIES - AVAILABLE FOR SALE:       
     Common stocks:                            
         Banks, trusts, and insurance companies ..      238.4         266.9         266.9
         Industrial, miscellaneous, and all other       112.3         102.0         102.0
     Non-redeemable preferred stocks .............      404.9         398.8         398.8
                                                   -----------   -----------   -----------
          Total equity securities ................      755.6         767.7         767.7
                                                   -----------   -----------   -----------

 Mortgage loans on real estate ...................        9.3  *                      9.1  *
 Real estate - net of depreciation ...............       10.9  *                     10.9  *
 Policy loans ....................................       58.7  *                     58.7  *
 Other long-term investments .....................      290.5  *                    281.3  *
 Short-term investments ..........................    2,221.3                     2,221.3
                                                   -----------                 -----------
          TOTAL INVESTMENTS ......................  $ 6,341.4                   $ 6,451.9
                                                   ===========                 ===========
<FN>
*     These   investment   categories  are  combined  and  are  shown  as  other
      investments  in the Statement of Financial Position.  Differences  between
      amortized  cost and amounts shown in the  Statement of Financial  Position
      for investments  other than fixed maturities and equity  securities result
      from certain valuation allowances.
</FN>
</TABLE>

                                     - 21 -
<PAGE>
                                                                  SCHEDULE  II.2

<TABLE>
<CAPTION>
                                              Aon Corporation and Subsidiaries
                                                        REINSURANCE


                                                                 Year Ended December 31, 1998
                                         -----------------------------------------------------------------------------------
                                                             Ceded to          Assumed                       Percentage of
                                                               other         from other                          amount
 (millions)                               Gross amount       companies        companies        Net amount    assumed to net
                                         -----------------------------------------------------------------------------------
<S>                      <C>                <C>                <C>              <C>              <C>                  <C>  
 LIFE INSURANCE IN FORCE (1) ...........    $ 10,653.0        $  9,813.0       $  5,509.9       $  6,349.9            86.8%
                                           ===========       ===========      ===========      ===========       ==========

 PREMIUMS AND POLICY FEES           
  Life Insurance .......................    $    235.1        $    103.5       $      7.2       $    138.8             5.2%
  A&H Insurance ........................       1,133.7             235.0             46.4            945.1             4.9%
  Specialty Property & Casualty (2) ....         734.6             241.0             95.6            589.2            16.2%
                                           ------------      ------------     -----------      -----------       ----------
    TOTAL PREMIUMS AND POLICY FEES (3) .    $  2,103.4        $    579.5       $    149.2       $  1,673.1             8.9%
                                           ============      ============     ===========      ===========       ==========




                                                                 Year Ended December 31, 1997
                                        ------------------------------------------------------------------------------------
                                                             Ceded to          Assumed                       Percentage of
                                                               other         from other                          amount
 (millions)                               Gross amount       companies        companies        Net amount    assumed to net
                                         -----------------------------------------------------------------------------------

 LIFE INSURANCE IN FORCE (1) ...........    $ 10,437.8        $ 12,514.9       $  8,822.7       $  6,745.6           130.8%
                                           ============      ============     ===========      ===========       ==========

 PREMIUMS AND POLICY FEES           
  Life Insurance .......................    $    214.0        $    153.5       $     85.8       $    146.3            58.6%
  A&H Insurance ........................       1,072.7             277.7            139.7            934.7            14.9%
  Specialty Property & Casualty (2) ....         634.2             178.3             72.0            527.9            13.6%
                                           ------------      ------------     -----------      -----------       ----------
    TOTAL PREMIUMS AND POLICY FEES (3) .    $  1,920.9        $    609.5       $    297.5       $  1,608.9            18.5%
                                           ============      ============     ===========      ===========       ==========




                                                                 Year Ended December 31, 1996
                                         -----------------------------------------------------------------------------------
                                                             Ceded to          Assumed                       Percentage of
                                                               other         from other                          amount
 (millions)                               Gross amount       companies        companies        Net amount    assumed to net
                                         -----------------------------------------------------------------------------------

 LIFE INSURANCE IN FORCE (1) ...........    $ 10,996.7        $ 12,749.8       $ 10,304.1       $  8,551.0           120.5%
                                           ============      ===========      ===========      ===========       ==========

 PREMIUMS AND POLICY FEES           
  Life Insurance .......................    $    206.5        $    133.0       $     87.7       $    161.2            54.4%
  A&H Insurance ........................       1,045.3             213.9            112.7            944.1            11.9%
  Specialty Property & Casualty (2) ....         490.3             160.8             91.9            421.4            21.8%
                                           ------------      -----------      -----------      -----------       ----------
    TOTAL PREMIUMS AND POLICY FEES (3) .    $  1,742.1        $    507.7       $    292.3       $  1,526.7            19.1%
                                           ============      ===========      ===========      ===========       ==========

<FN>
(1)   Includes credit life insurance.
(2)   Includes  mechanical  repair  insurance sold through  automobile  dealers,
      appliance warranty insurance and property liability insurance.
(3)   Insurance  underwriting  premiums written,  net of reinsurance ceded, were
      $1,667.6  million,  $1,596.2  million and  $1,581.6  million for the years
      ended December 31, 1998, 1997, and 1996, respectively.
</FN>
</TABLE>

                                     - 22 -
<PAGE>

                         Cross Reference Sheet, Pursuant
                           to General Instruction G(4)


ITEM IN FORM 10-K                            INCORPORATED BY REFERENCE TO
- - - - - - - - - - - - - - - - - -----------------                            ----------------------------

PART I

Item 1.  Business                            Annual Report to Stockholders of 
                                             the Registrant for the Year 1998 
                                             ("Annual Report") pages 6 through 
                                             12, 17 through 23 and 40.

Item 3.  Legal Proceedings                   Annual Report page 50 (note 12 of 
                                             Notes to Consolidated Financial 
                                             Statements).
PART II

Item 5.  Market for the  Registrant's        Annual Report pages 43 and 44 (note
         Common Stock and Related Security   8 of Notes to Consolidated 
         Holder Matters                      Financial Statements) and page 53
                                             ("Dividends paid per share"  and
                                             "Price range").

Item 6.  Selected Financial Data             Annual Report page 52.

Item 7.  Management's Discussion and         Annual  Report  pages 14 through 30
         Analysis of Financial Condition     and inside back cover ("Information
         and Results of Operations           Concerning Forward-Looking 
                                             Statements").


Item 7A. Quantitative and Qualitative        Annual Report page 29 ("Market Risk
         Disclosures about Market Risk       Exposure").

Item 8.  Financial Statements and            Annual  Report  pages 31 through 51
         Supplementary Data                  and 53.


PART III

Item 10. Directors and Executive             Proxy Statement For Annual  Meeting
         Officers of the Registrant          of Stockholders on April 16, 1999
                                             of the Registrant ("Proxy 
                                             Statement") pages 3, 7, and 10
                                             through 12.

Item 11. Executive Compensation              Proxy Statement pages 14 through 
                                             16.

Item 12. Security Ownership of               Proxy Statement pages 2, 9 and 10.
         Certain Beneficial
         Owners and Management

Item 13. Certain Relationships and           Proxy Statement page 21
         Related Transactions                ("Transactions With Management").

PART IV

Item 14. Exhibits, Financial Statement       Annual Report pages 31 through 51.
         Schedules, And Reports on 
         Form 8-K



                                     - 23 -
<PAGE>
                                  EXHIBIT INDEX

Exhibit Number                                                    Page Number of
Regulation                                                        Sequentially
S-K, Item 601                                                     Numbered Copy
- - - - - - - - - - - - - - - - - -------------                                                     -------------

(3)   Articles of incorporation and bylaws:

      (a)   Second  Restated Certificate   of  Incorporation of  the
            Registrant - incorporated by  reference to  Exhibit 3(a)
            to the 1991 Form 10-K.

      (b)   Certificate  of  Amendment of  the  Registrant's  Second
            Restated Certificate of Incorporation - incorporated  by
            reference to Exhibit 3 to the  First  Quarter 1994  Form
            10-Q.

      (c)   Bylaws of the Registrant - incorporated by  reference to
            Exhibit (d) to the 1982 Form 10-K.

      (d)   Certificate of Designation for the Registrant's Series C
            Cumulative Preferred Stock - incorporated  by  reference
            to  Exhibit  4.1 to  the  Registrant's Current Report on
            Form 8-K dated February 9, 1994.

(4) Instruments  defining  the rights of security holders, including
    indentures:

      (a)   Indenture dated September 15, 1992 between the Registrant
            and Continental  Bank  Corporation (now known as Bank  of
            America Illinois), as Trustee - incorporated by reference
            to Exhibit 4(a)  of the  Registrant's  Current  Report on
            Form 8-K dated September 23, 1992.

      (b)   Resolutions establishing  terms of 6.875% Notes Due 1999
            and 7.40% Notes Due 2002 - incorporated  by reference to
            Exhibit 4(d) to the 1992 Form 10-K.

      (c)   Resolutions   establishing   the  terms  of  6.70% Notes
            Due 2003 incorporated  by  reference to Exhibit 4(c)  to
            the 1993 Form 10-K.

      (d)   Resolutions   establishing   the  terms  of  6.30% Notes
            Due  2004 incorporated by  reference to  Exhibit 4(d) to
            the 1993 Form 10-K.

      (e)   Junior  Subordinated  Indenture  dated as of January 13,
            1997 between the Registrant and The Bank of New York, as
            trustee -  incorporated  by  reference to Exhibit 4.1 of
            the  Registrant's   Amendment  No.  1  to   Registration
            Statement on  Form  S-4 No. 333-21237  dated  March  27,
            1997 (the "Capital Securities Registration").

      (f)   First  Supplemental   Indenture  dated as of January 13, 
            1997 between  the  Registrant  and the Bank of New York,
            as trustee - incorporated by reference to Exhibit 4.2 of
            the Capital Securities Registration.

      (g)   Certificate  of Trust of Aon Capital A - incorporated by
            reference  to  Exhibit  4.3  of  the  Capital Securities
            Registration.

                                     - 24 -
<PAGE>
                                  EXHIBIT INDEX

Exhibit Number                                                    Page Number of
Regulation                                                        Sequentially
S-K, Item 601                                                     Numbered Copy
- - - - - - - - - - - - - - - - - -------------                                                     -------------

      (h)   Amended and  Restated  Trust  Agreement of Aon Capital A
            dated as of January 13, 1997  among  the  Registrant, as
            Depositor, The Bank of New York,  as  Property  Trustee,
            The Bank of New York  (Delaware),  as  Delaware Trustee,
            the   Administrative  Trustees  named  therein  and  the
            holders, from time to time, of the Capital  Securities -
            incorporated  by reference to Exhibit 4.5 of the Capital
            Securities Registration.

      (i)   Capital  Securities  Guarantee  Agreement  dated  as  of
            January 13, 1997 between  the  Registrant  and the  Bank
            of New  York,  as  guarantee trustee -  incorporated  by
            reference  to  Exhibit  4.8  of  the  Capital Securities
            Registration.

      (j)   Capital  Securities  Exchange  and  Registration  Rights
            Agreement  dated  as  of  January   13,  1997  among the
            Registrant,  Aon  Capital A and   Morgan  Stanley  & Co.
            Incorporated  and  Goldman,  Sachs  & Co. - incorporated
            by  reference to Exhibit 4.10 of the Capital  Securities
            Registration.

      (k)   Debenture  Exchange and  Registration  Rights  Agreement
            dated as of January  13, 1997 among the Registrant,  Aon
            Capital  A  and  Morgan Stanley & Co.  Incorporated  and
            Goldman,  Sachs & Co. -  incorporated  by  reference  to
            Exhibit 4.11 of the Capital Securities Registration.

      (l)   Guarantee  Exchange  and  Registration  Rights  Agreement
            dated as of January  13, 1997 among the  Registrant,  Aon
            Capital  A  and  Morgan  Stanley & Co.  Incorporated  and
            Goldman,  Sachs & Co.  - incorporated   by  reference  to
            Exhibit 4.12 of the Capital Securities Registration.


(10)  Material Contracts:

      (a)   Aon  Stock Option Plan (as amended and  restated  through
            1997) incorporated by reference  to  Exhibit 10(a) to the
            Registrant's  Quarterly  Report  to  the  Securities  and
            Exchange  Commission on  Form  10-Q for the quarter ended
            March 31, 1997 (the "First Quarter 1997 Form 10-Q").

      (b)   Registration Rights Agreement by and among the Registrant
            and  certain  affiliates  of  Ryan Insurance  Group, Inc.
            (Including  Patrick G. Ryan  and  Andrew  J.  McKenna)  - 
            incorporated  by  reference  to  Exhibit (f)  to the 1982
            Form 10-K.


      (c)   Deferred Compensation Agreement by and  among  Registrant
            and Registrant's directors who are not salaried employees
            of Registrant or  Registrant's  affiliates - incorporated
            by reference to Exhibit 10(i) to the 1987 Form 10-K.


                                     - 25 -
<PAGE>
                                  EXHIBIT INDEX

Exhibit Number                                                    Page Number of
Regulation                                                        Sequentially
S-K, Item 601                                                     Numbered Copy
- - - - - - - - - - - - - - - - - -------------                                                     -------------

      (d)   Aon  Stock  Award Plan (as amended and  restated  through 
            1997) incorporated by reference to  Exhibit 10(b)  to the
            First Quarter 1997 Form 10-Q.

      (e)   Amendment  and Waiver  Agreement  dated as of November 4,
            1991 among the  Registrant  and each of  Patrick G. Ryan,
            Shirley Ryan, Ryan Enterprises Corporation and  Harvey N.
            Medvin - incorporated by reference to  Exhibit  10(j)  to
            the 1991 Form 10-K.

      (f)   Registration  Rights Agreement dated November 2, 1992  by
            and between the  Registrant and Frank B. Hall & Co., Inc.
            - incorporated  by reference to Exhibit 4(c) to the Third
            Quarter 1992 Form 10-Q.

      (g)   Aon   Corporation  1994  Amended  and  Restated   Outside
            Director Stock  Award Plan - incorporated by reference to
            Exhibit 10(b) to the First Quarter 1994 Form 10-Q.

      (h)   Aon Corporation 1995 Senior Officer Incentive Compensation
            Plan -  incorporated by reference to Exhibit 10(p) to the
            1995 Form 10-K.

      (i)   Aon Deferred Compensation Plan  and  First  Amendment  to
            the  Aon Deferred  Compensation  Plan -  incorporated  by
            reference to Exhibit 10(q) to the 1995 Form 10-K.

      (j)   Aon Severance Plan - incorporated by reference to Exhibit
            10 to the Registrant's Quarterly Report to the Securities
            and  Exchange Commission  on  Form  10-Q  for the quarter
            ended June 30, 1997.

      (k)   Asset Purchase  Agreement dated July 24, 1992 between the
            Registrant and Frank B. Hall & Co. Inc. - incorporated by
            reference to Exhibit 10(c) to the Registrant's  Quarterly
            Report  on Form  10-Q for the period ended June 30, 1992.

      (l)   Stock  Purchase  Agreement  by and  among the Registrant,
            Combined  Insurance  Company of America,  Union  Fidelity
            Life  Insurance  Company  and  General  Electric  Capital
            Corporation dated as of November 11, 1995 -  incorporated
            by reference to Exhibit 10(s) of the 1995 Form 10-K.

      (m)   Stock  Purchase  Agreement  by and  among the Registrant;
            Combined Insurance Company of America; The Life Insurance
            Company  of Virginia;  Forth  Financial Resources,  Ltd.;
            Newco  Properties,  Inc.;   and General  Electric Capital
            Corporation  dated as of December 22, 1995 - incorporated
            by reference to Exhibit 10(t) to the 1995 Form 10-K.

                                     - 26 -
<PAGE>
                                  EXHIBIT INDEX

Exhibit Number                                                    Page Number of
Regulation                                                        Sequentially
S-K, Item 601                                                     Numbered Copy
- - - - - - - - - - - - - - - - - -------------                                                     -------------

      (n)   Agreement  and   Plan  of  Merger  among  the Registrant, 
            Purchaser  and  A&A  dated  as  of  December  11,  1996 -
            incorporated  by  reference  to Exhibit  (c) (1)  to  the
            Registrant's   Schedule  14D-1  filed  with  the  SEC  on 
            December 16, 1996.

      (o)   First  Amendment to Agreement and Plan of Merger dated as
            of  January 7, 1997  among  the Registrant, Purchaser and
            A&A  incorporated  by reference  to  Exhibit   (c)(3)  to
            Schedule  14D-1  filed  by  the  Registrant  with the SEC
            on January 9, 1997.

      (p)   Employment  Agreement dated June 1, 1993 by and among the
            Registrant,  Aon  Risk  Services,  Inc.  and  Michael  D.
            O'Halleran.

(12)  Statements regarding Computation of Ratios.

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

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

(13)  Annual  Report  to  Stockholders of the Registrant for the year
      ended December 31, 1998.

(21)  List of subsidiaries of the Registrant.


(23)  Consent  of Ernst & Young LLP to the incorporation by reference
      into Aon's Annual  Report on Form 10-K of their report included
      in the 1998  Annual  Report  to  Stockholders  and  into  Aon's
      Registration  Statement   Nos.  33-27984,  33-42575,  33-59037,
      333-21237, 333-50607 and 333-55773.

(99)  Annual Report to the Securities and Exchange Commission on Form
      11-K for the Aon  Savings  Plan for the year ended December 31,
      1998 - to be filed by  amendment as provided in Rule 15d-21(b).


                                     - 27 -
<PAGE>

                                                                   Exhibit 12(a)
<TABLE>
<CAPTION>

                  Aon CORPORATION AND CONSOLIDATED SUBSIDIARIES
                    COMBINED WITH UNCONSOLIDATED SUBSIDIARIES
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES



                                                             Years Ended December 31,
                                                 -------------------------------------------------
 (millions except ratios)                           1998      1997      1996      1995      1994
                                                 --------- --------- --------- --------- ---------
<S>                                               <C>       <C>       <C>       <C>         <C>  
 Income from continuing operations
    before provision for income taxes (1)        $  930.4  $  541.6  $  445.6  $  458.0  $  397.0

 ADD BACK FIXED CHARGES:

    Interest on indebtedness                         87.2      69.5      44.7      55.5      46.4

    Interest on ESOP                                  2.4       3.5       4.3       5.3       5.9

    Portion of rents representative of
      interest factor                                50.4      44.3      28.6      21.4      28.7

                                                 --------- --------- --------- --------- ---------
         INCOME AS ADJUSTED                      $1,070.4  $  658.9  $  523.2  $  540.2  $  478.0
                                                 ========= ========= ========= ========= =========


 FIXED CHARGES:

    Interest on indebtedness                     $   87.2  $   69.5  $   44.7  $   55.5  $   46.4

    Interest on ESOP                                  2.4       3.5       4.3       5.3       5.9

    Portion of rents representative of
       interest factor                               50.4      44.3      28.6      21.4      28.7

                                                 --------- --------- --------- --------- ---------
         TOTAL FIXED CHARGES                     $  140.0  $  117.3  $   77.6  $   82.2  $   81.0
                                                 ========= ========= ========= ========= =========

 RATIO OF EARNINGS TO FIXED CHARGES                   7.6       5.6       6.7       6.6       5.9
                                                 ========= ========= ========= ========= =========

 RATIO OF EARNINGS TO FIXED CHARGES (2)                         7.1       7.9
                                                           ========= =========

<FN>
(1)   Income from continuing  operations  before  provision for income taxes and
      minority interest includes special charges of $172 million and $90 million
      for the years ended December 31, 1997 and 1996, respectively.

(2)   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 years ended December
      31, 1997 and 1996, respectively.
</FN>
</TABLE>

                                                                   Exhibit 12(b)

<TABLE>
<CAPTION>
                                  Aon CORPORATION AND CONSOLIDATED SUBSIDIARIES
                                    COMBINED WITH UNCONSOLIDATED SUBSIDIARIES
                            COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES
                                          AND PREFERRED STOCK DIVIDENDS



                                                                  Years Ended December 31,
                                                 -------------------------------------------------------------
 (millions except ratios)                             1998        1997         1996        1995        1994
                                                 ----------- -----------  ----------- -----------  -----------
<S>                                                 <C>           <C>          <C>         <C>          <C>    
 Income from continuing operations
    before provision for income taxes (1)          $  930.4    $  541.6     $  445.6    $  458.0     $  397.0

 ADD BACK FIXED CHARGES:

    Interest on indebtedness                           87.2        69.5         44.7        55.5         46.4

    Interest on ESOP                                    2.4         3.5          4.3         5.3          5.9

    Portion of rents representative of
      interest factor                                  50.4        44.3         28.6        21.4         28.7

                                                   =========   =========    =========   =========    =========
         INCOME AS ADJUSTED                        $1,070.4    $  658.9     $  523.2    $  540.2     $  478.0
                                                   =========   =========    =========   =========    =========


 FIXED CHARGES AND PREFERRED STOCK DIVIDENDS:

    Interest on indebtedness                       $   87.2    $   69.5     $   44.7    $   55.5     $   46.4

    Preferred stock dividends                          69.7        82.1         28.7        37.5         48.4

                                                   ---------  ----------   ----------  ----------  ----------
         INTEREST AND DIVIDENDS                       156.9       151.6         73.4        93.0         94.8

    Interest on ESOP                                    2.4         3.5          4.3         5.3          5.9

    Portion of rents representative of
       interest factor                                 50.4        44.3         28.6        21.4         28.7

         TOTAL FIXED CHARGES AND PREFERRED         =========  =========    =========    =========    =========
             STOCK DIVIDENDS                       $  209.7    $ 199.4     $  106.3     $  119.7     $  129.4
                                                   =========  =========    =========    =========    =========

 RATIO OF EARNINGS TO COMBINED FIXED
   CHARGES AND PREFERRED STOCK DIVIDENDS (2)            5.1         3.3          4.9         4.5          3.7
                                                   =========   ========    =========   =========     =========

 RATIO OF EARNINGS TO COMBINED FIXED
   CHARGES AND PREFERRED STOCK DIVIDENDS (3)                        4.2          5.8
                                                               ========    =========

<FN>
(1)   Income from continuing  operations  before  provision for income taxes and
      minority interest includes special charges of $172 million and $90 million
      for the years ended December 31, 1997 and 1996, respectively.

(2)   Included in total fixed  charges and  preferred  stock  dividends  for the
      years ended  December  31, 1998 and 1997 are $66 million and $64  million,
      respectively, of pretax distributions on the 8.205% mandatorily redeemable
      preferred capital  securities which are classified as "minority  interest"
      on the condensed consolidated statements of operations.

(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 years ended December
      31, 1997 and 1996, respectively.
</FN>
</TABLE>


          NEED

                   OPPORTUNITY                CONCEPT

                                              STRATEGY   

                                     SOLUTION          

                                IMPLEMENT         

                            EXECUTE


                                    - 6 -
<PAGE>


GROWTH
Aon has evolved into a leading  global  provider of  brokerage,  consulting  and
consumer  insurance  services.  This dramatic growth in scale,  capabilities and
geographic  reach  has been  carefully  planned  and  executed  to  enhance  our
competitiveness and to create value for all of our stakeholders.

            Aon's  strategy  for  sustaining  long-term  profitable  growth  and
            creating stockholder value is twofold:  first, generate true organic
            growth from internal efficiencies and interdependent  services;  and
            second, expand our global distribution network and service offerings
            by acquisitions,  when they fit appropriately  with our strategy and
            our culture.

      Our organic growth stems from several efforts: developing new products and
      services;  establishing  long-term   relationships  with trusted insurance
      providers;  capitalizing  on  our  niche  specialties;  and  managing  our
      businesses more efficiently  through  initiatives such as segmentation and
      strategic account management.

We operate as a decentralized,  highly  responsive  organization and continue to
make efficiency  gains by eliminating  excess  administration  and  distribution
costs.  We are leaner,  more effective and have a greater  focus.  We do this in
part by increasing our investment in information  technology and taking the lead
in electronic commerce.

      Our goal is to have each  business  segment  be  number  one or two in its
      market;  to  diversify  our  products  and  services;  and to leverage our
      resources of expertise, technology and strategic partnerships.

Our  organization  has  been  put  to  the  test  in  integrating   acquisitions
effectively.  We rose to the occasion  and  assimilated  six major  acquisitions
smoothly  during the last 18 months.  We did this in an  environment  of ongoing
industry consolidation where we seized opportunities when they arose.

Recently,  we have acquired  Jauch & Hubener,  Germany's  premier  brokerage and
consulting  firm; Gil y Carvajal,  the largest retail and reinsurance  broker in
Spain; Le Blanc de Nicolay,  the foremost  reinsurance  broker in France;  Greig
Insurance,  Norway's largest broker;  and SGAP, a leading French broker.  In the
United States,  we acquired Auto  Insurance  Specialists,  which  specializes in
automobile insurance coverages.

            There is a growing need for large-scale  risk management  worldwide.
            In the United States, we are expanding our capital markets solutions
            and  risk-transfer  services.  Latin America and Europe  require new
            types of insurance  products,  and we are  confident  Asia will be a
            growing market in the years to come.


Aon in Action: AonLine

Aon is creating another competitive advantage through its innovative application
of  electronic  commerce  to  risk  management.  AonLine,  our  industry-leading
Extranet   service,   helps  risk  managers  save  time  and  resources  with  a
cost-effective network of interactive risk management tools.

AonLine  subscribers have  immediate  access to timely and accurate data, rating
services,  regulatory  information  and news of global  weather,  political  and
economic  conditions.  Clients can  customize  the secure  service with relevant
information  such as policies,  exposures,  bonds,  claims and  certificates  of
insurance.

AonLine not only automates transactions and processes,  it offers the collective
knowledge of Aon account teams and practice leaders. With the wide acceptance of
AonLine, Aon has established itself as the leading information resource for risk
managers while providing a new distribution channel for our services.


PICTURE OMITTED (Caption listed below)
Working to sustain  Aon's  long-term  growth are (from  left) Mike Rice,  Arlene
Hardy, Harvey Medvin, David Cole and Dennis Mahoney.


                                     - 7 -
<PAGE>

               RETAIL BROKERAGE

                                     PROGRAMS AND SERVICES

REINSURANCE                                                  WHOLESALE BROKERAGE

                                     CONSULTING   

PERSONAL LINES

               WARRANTY


                                     - 8 -
<PAGE>
OPPORTUNITIES
As the  pacesetter  in a dynamic  industry,  Aon has learned to  anticipate  and
maneuver the turns in our  ever-changing  business  landscape.  We have a proven
track record of meeting  challenges  head-on and turning them into opportunities
for growth and value creation. To stay competitive, we are always in the process
of changing the way we do business.

            To  optimize  our  leadership  in risk  management,  consulting  and
            global  distribution,  Aon has  reinvested  more than $3  billion in
            expanding our businesses during the last decade.

There is a convergence in the financial  services  industry.  Banks,  accounting
firms,  insurance  companies and brokerages are seeking a share of the market in
risk management services, consulting and global distribution. We are clearly the
leader in  providing  professional  insurance  and  consulting  services  and in
distributing  insurance  products.  We  intend  to stay in the  lead by  meeting
customer demands and by seizing  opportunities to market our innovative services
and distribution channels.

      Insurance  buyers need a knowledgeable  advocate to help them identify and
      manage risk effectively in these complex times. We fill that  intermediary
      role better than anyone else. We are adding real value by being  advocates
      -- not just suppliers -- for our clients.

      Aon is developing a new consumer products strategy that will capitalize on
      our  marketing  and  distribution  skills.  We have  given  the  broker  a
      reinvigorated role in the distribution of consumer insurance  products,  a
      market where we see tremendous opportunity. We also see great potential in
      being  the high  quality,  low cost  provider  of  group  and  association
      insurance  products.  We intend to expand our affinity services and create
      new ones to build an even  more  efficient  distribution  system  that can
      vertically  integrate  affinity  products  with life,  accident and health
      insurance.

            Aon Capital Markets,  our investment  banking unit, took steps early
            in  the  year  to  provide  more   integrated  risk  management  and
            investment  banking  services to Aon's  insurance,  reinsurance  and
            corporate clients. It has quickly become a leader in the transfer of
            insurance risk to the capital markets.

We do business around the world and our clients look to us for timely,  accurate
data and communications.  Our commitment to the innovative use of technology has
never  been  stronger  as we lead the  industry  in  effective  applications  of
electronic commerce and information technology.


Aon in Action: Managed Care

Rapid changes in the delivery and funding of healthcare services prompted Aon to
develop creative solutions for healthcare organizations. Aon Healthcare Alliance
was  created  to  bring  all of  Aon's  resources  together  to help  healthcare
providers  better  manage  their  risk.  The market for  managed  care stop loss
coverage is growing rapidly and is expected to reach $1.5 billion this year. Aon
is playing a lead role in providing solutions to this exciting sector.

Through  Aon  Managed  Care,  a  business  unit of Aon  Healthcare,  we offer an
insurance product nationwide to hospital physicians and provider-owned HMOs that
are entering into capitated,  managed care  contracts.  Aon insures them against
catastrophic exposures with products developed jointly by several Aon units.

While helping  healthcare  providers contain costs and minimize  financial risk,
Aon has taken a commanding  lead in the U.S.  market and is  pioneering  managed
care stop loss coverage in Europe and Latin America.

PICTURE OMITTED (Caption listed below)
From left:  Kevann Cooke,  Richard  Ravin,  Paul Davies and Dick Riley  identify
opportunities to enhance Aon's leadership position.


                                     - 9 -
<PAGE>

               INTERDEPENDENCE

                                             CLIENT FOCUS

                         PARTNERSHIP

                                   ENTREPRENEURIAL SPIRIT

                                                  COLLECTIVE EXPERTISE

INNOVATION

                                     - 10 -
<PAGE>
CULTURE
Aon's culture is based on a core set of beliefs,  the most important of which is
a  commitment  to working  together for mutual  success.  We succeed by bringing
together different  companies and diverse people into a common culture dedicated
to excellence.

            The name Aon in Gaelic  connotes unity or oneness and signifies what
            we want our  company to always be:  united in purpose  and action to
            achieve  our  mission  of  being  the  premier  global  provider  of
            innovative insurance and consulting services.

      We are a service  organization  committed  to putting  our clients
      first.   We  provide   advice,   service  and  consulting  as  the
      industry's leading global  distribution  organization.  Everything
      we do is ultimately focused on  creating   value for our  clients,
      and we do it best  through  our  interdependence, another  primary
      value  of  our culture.  Interdependence,  as we define it,  means
      bringing  together two or more  business units of Aon to develop a
      holistic solution to our clients needs.

By pooling our  collective  expertise,  skills,  experience and  creativity,  we
foster dynamic decision making, innovative thinking and unbeatable results.

            We encourage grass-roots product development and an open exchange of
            ideas that makes the most of the collective knowledge and experience
            of the  individuals  that  make  up  Aon.  Operating  in  this  team
            environment  fosters a creative and  entrepreneurial  spirit. We are
            builders and innovators who have the competency to develop solutions
            for today's needs, the foresight to anticipate  future service needs
            and the tools it will take to deliver them.  Most  importantly,  the
            Aon  culture  gives us the  freedom  to express  ourselves,  to make
            decisions,  to develop our professional  skills and to become valued
            contributors.

Aon in Action: Aon University

As a premier  provider of innovative  insurance and  consulting  solutions,  Aon
needs  dynamic,  creative,  talented,  knowledgeable,  committed  and  competent
employees.  With 44,000 employees worldwide, the challenge is not just keeping a
diverse work force  informed but also  assimilating  thousands of employees from
recent acquisitions. Aon's new training and development unit, Aon University, is
helping employees to compete  successfully in an environment of explosive growth
and change.

Interactive  classes are conducted at various locations around the world and are
focused on  formalizing  the learning  process  about our  company,  culture and
vision.  Course work includes  programs in  leadership,  people  management  and
client service.  Through team  assignments,  participants  learn  experientially
about Aon's core value of  interdependence,  which brings  together  various Aon
resources to provide  clients the most  innovative  solutions and  comprehensive
services.

PICTURE OMITTED (Caption listed below)
From left: Ken LeStrange, Dan Cox, Kevin Callahan and Ricky Byrdsong share their
vision of Aon's entrepreneurial culture.

                                     - 11 -
<PAGE>
Aon's culture is based on a team spirit that empowers  individuals  to do better
so that as an organization we can do more. Our confidence and determination give
us that extra edge and will to succeed.

            We are constantly striving to be better, to provide greater service,
            to help  clients  manage  their  risk and to ensure  their  success.
            People  work at Aon and  clients  stay with Aon  because of a shared
            commitment to  excellence.  Acting as advocates for our clients,  we
            offer  them  our  specialized   skills,   industry   experience  and
            knowledge, innovative technology and professionalism. And, we do all
            this within an organization that is flexible and responsive.

While Aon's culture is based on unity, we also value  individuality,  diversity,
regional customs and local business  practices.  We respect each other and share
long-term goals and  commitments.  In all of our business  dealings,  we conduct
ourselves with integrity, fairness and ethical standards.

            More than 30% of Aon's stock is owned by employees who have a direct
            stake in the  company's  profitable  growth  and  share the goals of
            fellow stockholders.

            To achieve  our vision  and  sustain  success,  Aon  recognizes  the
            importance  of nurturing a corporate  culture that is  supportive of
            and is aligned with the organization's  business goals and strategy.
            Our shared values, experience and attitudes drive our organizational
            behavior,  client  service and  ultimate  success.  The Aon team has
            created a culture that not only reinforces its business  strategies,
            but  also is  continuously  learning,  adapting  and  responding  to
            changing markets and competitive environments.

"We  never  underestimate  our  competition,"  says Mike  O'Halleran,  Aon Group
President. "The way we differentiate ourselves is by learning together,  working
together  and  bringing the best of Aon together to build value for our clients.
By  doing  that,  we also  create  value  and  success  for each  other  and our
stockholders."

PICTURE OMITTED (Caption listed below)
Aon's commitment to employee training and personal development is a company-wide
objective  supported by (from left) Melody Jones,  Mike O'Halleran,  Mike Conway
and Dirk Verbeek.


                                     - 12 -
<PAGE>

                      ***** TABLE OF CONTENTS OMITTED *****

                                     - 13 -

<PAGE>
FINANCIAL AND OPERATIONS HIGHLIGHTS

MANAGEMENT'S DISCUSSION AND ANALYSIS

This annual report contains  forward-looking  statements as that term is defined
in the  Private  Securities  Litigation  Reform  Act of 1995.  See  "Information
Concerning  Forward-Looking  Statements" on the inside of the back cover of this
annual report.

Aon is a leading  provider of  professional  insurance  brokerage and consulting
services and a distributor  of insurance  products.  Aon serves  commercial  and
industrial businesses, associations and affinity groups, insurance organizations
and individual  policyholders  through nearly 44,000 employees in 550 offices in
120 countries.

Aon provides insurance, reinsurance, wholesale and specialty brokerage; employee
benefits and human resources consulting;  personal lines insurance; warranty and
credit insurance;  and niche insurance services. The company is a pioneer in the
development of new products and services for a wide range of applications,  from
the use of capital markets for catastrophe  risk financing to the development of
innovative long-term care coverages for senior citizens.

The  following  sections  provide a  discussion  of 1998  consolidated  results,
information on business segments and related financial data.


CONSOLIDATED RESULTS

GENERAL
In 1998, Aon invested approximately $374 million in business combinations in its
brokerage and consulting  businesses.  These business combinations were financed
primarily by bank loans,  internal funds and the reissuance of common stock from
treasury.  The major  1998  acquisitions  include:  Auto  Insurance  Specialists
(AIS)--an  insurance broker specializing in automobile  insurance  coverage;  Le
Blanc de Nicolay (Le Blanc)--the largest reinsurance broker in France; and Gil y
Carvajal--the  largest retail and reinsurance broker in Spain. AIS was accounted
for by the  pooling of  interests  method and Le Blanc and Gil y Carvajal by the
purchase method.

In 1997, Aon invested approximately $1.6 billion in business combinations in its
brokerage and consulting  businesses.  These business combinations were financed
primarily by the issuance of capital securities, internal funds and the issuance
of commercial paper. The major 1997 acquisitions include:  Alexander & Alexander
Services  Inc.  (A&A)--a  leading  global  insurance  brokerage  and  consulting
company;  Minet--a  worldwide  specialty  reinsurance  and  wholesale  brokerage
operation;  Sodarcan--a Canadian insurance brokerage and consulting company; and
Jauch & Hubener--the largest insurance brokerage and consulting firm in Germany.
In fourth  quarter 1996, Aon acquired Bain Hogg Group plc (Bain Hogg), a leading
insurance broker in the United Kingdom and Asia, for approximately $260 million.
These  business  combinations  were  accounted for using the purchase  method of
accounting. The resultant goodwill is being amortized principally over 40 years.

Because  of these  business  combinations,  all  brokerage  revenue  and  income
comparisons are significantly impacted.

In 1996, Aon sold two of its domestic insurance underwriting subsidiaries, Union
Fidelity  Life  Insurance  Company  (UFLIC)  and The Life  Insurance  Company of
Virginia  (LOV) (see note 3). The  after-tax  proceeds  from the sales were $1.2
billion. UFLIC and LOV results are classified in the consolidated  statements of
income as discontinued  operations in 1996. 

                                     - 14 -
<PAGE>
For  purposes of the 1997  compared  to 1996  consolidated  results  discussion,
comparisons against prior year results are based on continuing operations.

SPECIAL CHARGES
Special  charges  information  located  in  note  1 on  pages  36  and 37 is
incorporated herein by reference.

In  first  quarter  1999,   Aon   announced  the   consideration   of  potential
restructuring plans for its international operations, which would be designed to
create operating  efficiencies to help position Aon for continued growth despite
the challenging trading  environment.  Major elements of the restructuring plans
include European workforce  reductions related to organizational  restructuring,
closure and  consolidation  of  duplicate  facilities,  and other  consolidation
costs. The plans also include a voluntary early retirement plan for employees of
Aon's U.S. and Canadian operating subsidiaries. Aon anticipates that these plans
will require a first quarter 1999 pretax  special charge in the range of $100 to
$150 million.


REVENUE AND INCOME BEFORE INCOME TAX

CONSOLIDATED RESULTS FOR 1998 COMPARED TO 1997
For purposes of the following  consolidated results  discussions,  certain prior
period information has been restated to conform to the 1998 presentation.

Total  revenues  amounted to $6.5  billion,  an  increase  of 13% in 1998.  This
increase was largely  attributable  to growth in brokerage  commissions and fees
resulting from business  combination  activity.  Brokerage  commissions and fees
increased 16% to $4.2 billion.


CONSOLIDATED GEOGRAPHIC REVENUE
(millions)    Years ended December 31   1998     1997    1996
=============================================================
  United States                       $3,736   $3,413  $2,646
  United Kingdom                       1,244    1,158     535
  Europe                                 790      439     394
  Rest of World                          723      741     313
- - - - - - - - - - - - - - - - - -------------------------------------------------------------
Total revenue                         $6,493   $5,751  $3,888
=============================================================

U.S.  revenues  increased 9% in 1998  compared to 1997  primarily due to organic
growth.  European revenue increased 27% in 1998 to $2 billion, and rest of world
revenue of $723 million declined 2%. Revenue  increased in 1998 when compared to
1997 primarily due to 1998 and late 1997  acquisitions  and to internal  growth.
Approximately  43% of 1998 income before  income tax is derived from  operations
outside the U.S.

Premiums  and other  revenue  is  primarily  related to  insurance  underwriting
operations  and includes  premiums  earned and other income of $1.7 billion,  an
increase of 4% in 1998.  Extended warranty premiums earned increased $63 million
or 13% reflecting  continued  growth  primarily in the appliance and electronics
lines and, to a lesser extent,  the mechanical  extended  warranty line.  Direct
sales premiums earned  increased  modestly,  reflecting

                                     - 15 -
<PAGE>
changes in the consumer  insurance  market.  The run-off of North  American auto
credit business partially offset this growth in premiums earned.

Investment income of $590 million, which includes related expenses and income on
disposals,  increased  18% for the  year  primarily  attributable  to  brokerage
acquisitions,  income  received on certain  private equity and other  investment
holdings,  assets underlying capital accumulation  products and higher levels of
income on disposals. The investment portfolio yield remained stable.

General  expenses  increased  7% for the year  primarily  due to  growth  in the
brokerage  businesses.  Benefits to policyholders  increased 6% when compared to
1997,   reflecting  a  higher  volume  of  new  extended  warranty  and  capital
accumulation business. This increase was partially offset by the run-off of auto
credit  business  as  planned.  Interest  expense  increased  24% as a result of
acquisition financing. Amortization of intangibles increased slightly.

Total  expenses  increased  7% or $353 million  over 1997.  Total 1998  expenses
increased  over  prior  year  primarily  due  to  investments  in  new  business
initiatives,  technology and product development.  Restructuring liabilities for
recent  acquisitions  and 1997 special  charges have been reduced by payments as
planned.  Total expenses,  excluding the 1997 special charges,  increased 10% or
$525 million over 1997.

References to income before income tax are before minority  interest  related to
the  issuance of 8.205%  mandatorily  redeemable  preferred  capital  securities
(capital securities) (see note 8).

Income before income tax increased  $389 million or 72% in 1998 primarily due to
the inclusion of special  charges in 1997.  Excluding  special  charges,  income
before  income  tax  increased  30% or $217  million  largely  due to  brokerage
business combination activity, to the achievement of cost savings resulting from
the consolidation of brokerage  operations during 1998 and 1997, and to internal
growth.

Fourth  quarter  revenue  increased  12% to $1.7 billion  when  compared to 1997
primarily  reflecting brokerage business  combination  activity.  Total expenses
increased  11% to $1.5  billion for the quarter.  Pretax  income  increased  $41
million or 21% to $238 million.  The increase in pretax earnings reflects growth
in the insurance brokerage and other services and consulting segments related to
business combination activity and to internal growth.


CONSOLIDATED RESULTS FOR 1997 COMPARED TO 1996
Total revenue  amounted to $5.8 billion,  an increase of 48% in 1997.  Brokerage
commissions  and fees  increased  88% to $3.6 billion  resulting  from  business
combination  activity and internal  growth.  Premiums and other  revenue of $1.6
billion  increased  4% in 1997,  primarily  reflecting  continued  growth of new
business in the mechanical, appliance and electronics lines. The planned run-off
of North American auto credit business  partially offset this growth in premiums
earned.   Investment  income  of  $500  million  increased  28%  for  the  year,
attributable  primarily  to  brokerage  acquisitions  and to income  received on
certain private equity investment holdings.

General  expenses  increased 65% for the year primarily due to growth in the
brokerage businesses.  Benefits to policyholders  increased 7% when compared
to 1996  reflecting a higher volume of new extended  warranty  business,  as
well  as  growth  in  capital  accumulation  products.   This  increase  was
partially offset by the profitable  phase-out of certain specialty liability
programs and the run-off of auto credit business as planned. Interest

                                     - 16 -
<PAGE>
expense  increased 75% as a result of  acquisition  financing.  Amortization  of
intangibles increased $45 million or 59%, reflecting brokerage acquisitions.

Total expenses  increased 51% or $1.8 billion over 1996.  The increase  reflects
the  inclusion of 1997 and 1996 pretax  special  charges of $172 million and $90
million,  respectively.  Total  expenses,  excluding  the 1997 and 1996  special
charges,  increased 50% over 1996, primarily  reflecting  brokerage  acquisition
activity.

Income before  income tax increased $96 million or 22% in 1997  primarily due to
acquisition  activity.  Excluding  special  charges,  income  before  income tax
increased 33% or $178 million.


PIE CHART DESCRIBED BELOW

1998 REVENUE
BUSINESS SEGMENTS
   58% of 1998 Revenue was attributed to Insurance  Brokerage and Other Services
       Segment  
   10% of 1998 Revenue was attributed to Consulting Segment
   30% of 1998 Revenue was attributed to Insurance Underwriting Segment
   2%  of 1998 Revenue was attributed to Corporate and Other Segment            


BUSINESS SEGMENTS
In fourth quarter 1998, Aon adopted Financial  Accounting Standards Board (FASB)
Statement  No. 131  "Disclosures  about  Segments of an  Enterprise  and Related
Information." All prior period segment  information  presented has been restated
to conform to the current  period  presentation.  For  purposes of the  business
segments,  comparisons against 1997 results exclude discontinued  operations and
special charges.  A discussion of discontinued  operations  follows the Business
Segments section.

Aon's  operating  segments are identified as those for which separate  financial
information  is available  and that are evaluated on a regular basis in deciding
how to allocate resources and in assessing  performance.  Total revenue for each
of the major operating  segments is presented both by major line of business and
by  geographic  area.  Since Aon's  culture  fosters  interdependence  among its
operating  units,  the  segregation  of expenses  by line of  business  and on a
geographic  basis is  difficult  to  delineate.  While  revenue is  tracked  and
evaluated separately by management,  total expenses are allocated to major lines
of business within each of the business  segments.  In addition to revenue,  Aon
also measures a segment's financial performance based on business segment income
before income tax. The accounting policies of the business segments are the same
as those  described  in the summary of  significant  accounting  principles  and
practices (see note 1). Revenues are attributed to geographic areas based on the
location of the resources producing the revenues.

Aon classifies its businesses  into three major  operating  segments:  Insurance
Brokerage and Other Services,  Consulting and Insurance  Underwriting;  and into
one non-operating segment, Corporate and Other.

All intercompany revenues and expenses are eliminated in computing  consolidated
revenues and income before income tax. A description  of operations and a review
of financial performance for each of the four business segments follow.


INSURANCE BROKERAGE AND OTHER SERVICES
The Insurance Brokerage and Other Services segment consists principally of Aon's
retail  brokerage,  reinsurance,  specialty and wholesale  operations.  The four
major  operating  units are Aon Risk  Services,  Aon Re Worldwide,  Aon Services
Group and Alternative Market Operations.

AON RISK SERVICES  (ARS) is a leading  insurance  brokerage and risk  management
services organization. Companies of all kinds look to ARS for comprehensive risk
management solutions,  including exposure  identification,  insurance placement,
claims management,  loss control and administrative  services. 

                                     - 17 -
<PAGE>
PIE CHART DESCRIBED BELOW

1998 REVENUE
INSURANCE BROKERAGE AND OTHER SERVICES            
   50% of  Total Insurance Brokerage and Other Services 1998 Revenue was derived
       from United States
   21% of  Total Insurance Brokerage and Other Services 1998 Revenue was derived
       from United Kingdom
   17% of  Total Insurance Brokerage and Other Services 1998 Revenue was derived
       from Europe  
   12% of  Total Insurance Brokerage and Other Services 1998 Revenue was derived
       from Rest of World            


In 1998, ARS grew through acquisitions  principally in the United States, Europe
and Latin  America.  Significant  investments  also  were  made in  professional
talent,  technology and the development of specialized  products and services to
meet the  evolving  needs of clients.  Examples  include Aon  Enterprise,  which
focuses on the needs of small  commercial  companies,  and  Impact  Forecasting,
which provides computer-based catastrophe modeling.

The ARS strategy of industry specialization and product expertise, combined with
the  strategic  account  management  service  concept,  provide the  platform to
deliver  focused,  cost-effective  services on a global basis.  Due to its great
depth of intellectual capital,  proprietary services and strategic approach, Aon
Risk Services is the preferred choice in managing risk.

AON RE  WORLDWIDE  (AON RE) is the  largest  reinsurance  broker  in the  world,
offering  reinsurance  brokerage,   analytical  services  and  alternative  risk
financing vehicles.  Through its product and industry specialization,  Aon Group
Limited, headquartered in the United Kingdom, is a major contributor to Aon Re's
leadership   position  in  every  major  reinsurance   market.   Aon  Re  placed
approximately $10 billion in premium volume in 1998.

Most  importantly,  Aon Re offers a seamless  service network to its clients who
range from  multinational  insurance  companies to single parent captives.  This
network  provides  access to local  experts with global  solutions  for the most
appropriate  risk transfer and risk  financing.  Aon Re recruits the best people
from  inside  and  outside  the  industry.  We also  have  made the  investments
necessary to support geographic  technical  expertise and consultative  services
that are essential to long-term  success in the highly  competitive  reinsurance
environment.

Sister-company  Aon Capital  Markets is a leader in developing  capital  markets
risk  financing  through  insurance-linked  securities  and  provides  financial
advisory  services  to  clients  in need of risk  financing  beyond  traditional
insurance and reinsurance programs.

AON SERVICES GROUP (ASG) develops  specialized  insurance  products and provides
administrative support for associations and affinity groups, service businesses,
healthcare providers and commercial organizations. ASG's innovative products are
typically  delivered  through  distribution  systems that target specific market
segments. The major ASG operations include:

Affinity Insurance Services, with more than six million policyholders,  provides
personal  and  professional   insurance  for  such  diverse  groups  as  nurses,
accountants and lawyers.

The Healthcare  Alliance,  the largest provider of risk management and brokerage
services to the  healthcare  industry,  is a practice that  continues to grow in
response to the changing needs of healthcare providers.

Cambridge  Integrated  Services,  a third party claims  administrator,  provides
greater  efficiency and total loss cost  management by offering a broad range of
niche claims  specialties  under one banner.  Its expertise ranges from workers'
compensation to legal malpractice, from product  liability to toxic tort claims.

Wholesale  brokerage  companies,  including  such  well-respected  companies  as
Sherwood Insurance Services and Swett & Crawford, distribute specialty
insurance products.

ASG  continues  to  grow  by  enhancing  its  existing  distribution   networks,
leveraging  the  distribution  resources of other Aon companies and  continually
developing exciting alternatives to traditional insurance services.

ALTERNATIVE  MARKET OPERATIONS  (AMO),  established by Aon in 1997, is a leading
provider  of  custom-designed  products  and  services.  It  features  specialty
underwriting  capabilities that produce an annual premium volume in excess of $1
billion.

                                     - 18 -
<PAGE>
Utilizing the disciplines of underwriting,  risk financing,  risk management and
risk  syndication,   AMO  is  devoted  to  creating  specialty,   non-commodity,
value-added  products and services.  Active in diverse industry segments,  AMO's
specialties  include  entertainment,   sports  and  leisure,   public  entities,
professional liability, workers' compensation,  marine insurance, long-term care
facilities, media business and financial institutions.

AMO remains  committed to  anticipating  industry  trends while  maintaining its
position as a leading provider of innovative solutions.


The Insurance  Brokerage and Other Services segment includes service fee revenue
from Aon Warranty Group;  Aon Capital Markets;  and Aon Credit  Services,  which
provides   financing   services  for  insurance   premiums  and  auto  financing
receivables.

The  following  tables  and  commentary  provide  financial  information  on the
Insurance Brokerage and Other Services segment.


INSURANCE BROKERAGE AND OTHER SERVICES
(millions)           Years ended December 31          1998      1997      1996
==============================================================================
Revenue:
  Retail                                            $2,761    $2,327    $1,287
  Reinsurance and wholesale                          1,021       894       441
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total revenue                                        3,782     3,221     1,728
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Operating expenses                                   3,086     2,749     1,455
Amortization of intangibles                             33        36        37
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total expenses                                       3,119     2,785     1,492
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax excluding special charges     663       436       236
Special charges                                         --       132        74
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax                            $  663    $  304    $  162
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Identifiable assets at December 31                  $9,006    $8,382    $4,985
==============================================================================


Total 1998 Insurance  Brokerage and Other Services revenue was $3.8 billion,  up
17%. Acquisitions  accounted for the majority of this revenue growth.  Excluding
the impact of  acquisitions,  revenue  related to brokerage core businesses grew
approximately 4% in a very competitive environment.  Revenue includes investment
income allocated to this operating segment. See "Investment Operations."


INSURANCE BROKERAGE AND OTHER SERVICES
(millions)          Years ended December 31           1998      1997      1996
==============================================================================
Revenue:
  United States                                     $1,884    $1,670    $1,121
  United Kingdom                                       798       733       197
  Europe                                               626       317       301
  Rest of World                                        474       501       109
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total revenue                                       $3,782    $3,221    $1,728
==============================================================================

U.S.  revenue  of $1.9  billion  in 1998 was up 13% from  1997,  while  European
revenue of $1.4 billion  increased 36% from 1997,  primarily due to  acquisition
activity.  Rest of world revenue declined in 1998 primarily due to the impact of
foreign exchange rates.

                                     - 19 -
<PAGE>
Insurance  Brokerage and Other Services segment results were impacted positively
by acquisitions, in particular the inclusion of AIS, Le Blanc and Gil y Carvajal
in 1998 and Jauch & Hubener in late 1997.  Retail brokerage results continued to
reflect  competitive  property  and  casualty  pricing.  Pretax  income  growth,
excluding 1997 special  charges,  was slowed  primarily due to market  pressures
experienced  in  the  reinsurance   brokerage   business.   Investments  in  new
initiatives,  with little or no immediate revenue growth,  also impacted revenue
and pretax  income  results.  Pretax  margins in this segment  improved in 1998,
reflecting cost savings resulting from the consolidation of businesses  acquired
in 1997.


PIE CHART DESCRIBED BELOW
        
1998 REVENUE
CONSULTING            
   63% of Total Consulting 1998 Revenue was derived from United States
   22% of Total Consulting 1998 Revenue was derived from United Kingdom
   6%  of Total Consulting 1998 Revenue was derived from Europe
   9%  of Total Consulting 1998 Revenue was derived from Rest of World


CONSULTING
AON CONSULTING  WORLDWIDE (ACW) is a consulting  organization that helps clients
maximize  performance  and  financial  results by linking  people  strategies to
business  goals.  ACW's  primary  goal is to ensure our clients have access to a
wide range of integrated human resource  services designed to meet their diverse
needs and to help them attract, develop and retain the best people.

ACW  is  organized  into  four  consulting  groups:  Employee  Benefits,   Human
Resources,  Compensation, and Change Management. Within these groups, ACW offers
organizational  analysis and human resources strategic planning;  job design and
competency modeling; recruitment and selection; compensation and reward systems;
benefits  design and  management;  training  and  development;  human  resources
compliance  and  risk  management;  and  individual  and  organizational  change
management.

ACW provides some of Aon's  fast-growing  services,  expanding  through  organic
growth  and  strategic  acquisitions.   During  1998,  acquisitions  focused  on
outsourcing  and  compensation   initiatives.   Additionally,   Employment  Risk
Solutions,  a joint initiative with Aon Risk Services,  was developed to provide
comprehensive  solutions for  occupational and  non-occupational  disability and
healthcare  benefits.  ACW also developed a specialized mergers and acquisitions
team to work with its ARS  colleagues in providing due diligence  assistance and
advice on employee benefit plan design and funding.  In the future, ACW plans to
expand  its  range  of  services  to serve  the  changing  needs  of  healthcare
providers.

The  following  tables  and  commentary  provide  financial  information  on the
Consulting segment.

CONSULTING
(millions)          Years ended December 31           1998      1997      1996
==============================================================================
Total revenue                                         $615      $553      $274
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Operating expenses                                     544       491       250
Amortization of intangibles                              3         4         3
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total expenses                                         547       495       253
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax excluding special charges      68        58        21
Special charges                                         --        13         1
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax                              $ 68      $ 45      $ 20
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Identifiable assets at December 31                    $150      $141      $ 40
==============================================================================

In the Consulting segment,  1998 revenue increased 11% to $615 million.  Revenue
growth was influenced by acquisition  activity and expansion of integrated human
resources consulting activities. Revenue includes investment income allocated to
this operating segment. See "Investment Operations."

                                     - 20 -
<PAGE>
CONSULTING
(millions)          Years ended December 31           1998      1997      1996
==============================================================================
Revenue:
  United States                                       $387      $358      $170
  United Kingdom                                       134       131       100
  Europe                                                36        18         1
  Rest of World                                         58        46         3
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total revenue                                         $615      $553      $274
==============================================================================

U.S.  revenue of $387 million in 1998 was up 8% from 1997.  European revenue
of $170  million  increased  14%  from  1997  while  rest of  world  revenue
increased to $58 million.

INSURANCE UNDERWRITING
Aon's Insurance Underwriting  businesses provide a variety of insurance products
marketed  directly to individuals.  The principal  business  products are direct
sales life, health and accident  insurance,  underwritten by Combined  Insurance
Company of America  (Combined) and extended warranty  products,  underwritten by
Virginia Surety Company and London General Insurance Company.


PIE CHART DESCRIBED BELOW

1998 REVENUE
INSURANCE UNDERWRITING            
   70% of Total Insurance Underwriting 1998 Revenue was derived from United
       States
   15% of Total Insurance Underwriting 1998 Revenue was derived from United
       Kingdom
   6%  of Total Insurance Underwriting 1998 Revenue was derived from Europe
   9%  of Total Insurance Underwriting 1998 Revenue was derived from Rest of
        World

          

COMBINED  INSURANCE  COMPANY  OF  AMERICA  is a  market  leader  in the  sale of
supplemental  insurance  products.  Its  tradition  of  unique  product  mix and
expanding  global presence  produces strong  predictable  cash flows with steady
premium growth rates.

Combined has more than 8,000  dedicated  agents  worldwide.  They  specialize in
supplemental health, accident and life insurance coverage for individuals in all
stages of life, from childhood to retirement. This specialization has translated
into a  policyholder  base of nearly  five  million  insureds,  a highly  stable
management  team and a  flexible  sales  force  ready to  respond  to a  rapidly
changing marketplace.

Combined's  growth strategy is to strengthen  traditional  businesses to sustain
organic  growth  while  investing  in  new  opportunities   that  leverage  core
competencies.  Combined is partnering with other Aon companies to distribute its
products to affinity  groups and to develop new  applications  for  supplemental
coverages.  We also are introducing  several new policies with enhanced benefits
and products designed specifically for senior citizens.

THE  AON  WARRANTY   GROUP   provides   fee-based   services   such  as  premium
administration,  claims processing,  customer service,  customer care management
and value-added,  after-sale services. These services are provided in support of
warranty programs  underwritten by Virginia Surety or as independent adjuncts to
clients' customer care programs.

VIRGINIA  SURETY  COMPANY  and  its  UK-based  sister  company,  London  General
Insurance  Company,  are leading  underwriters of consumer extended  warranties,
with more than four million  policies issued in 1998. These warranties cover the
entire range of consumer  purchases  including new and used  automobiles,  major
household appliances, consumer electronics and computers.

Virginia Surety's expertise and proprietary data base of extended warranty claim
experience is second to none.  Coupled with its innovative  approach to customer
care, Virginia Surety is the leading choice among  manufacturers,  retailers and
consumer brand marketers.

1998 was marked by  expansion  outside the United  States,  where there is great
demand  for  consumer  protection  plans.  New  products  and  new  distribution
channels,  such as credit card  enhancement  programs,  have been  developed  to
further penetrate these markets.

                                     - 21 -
<PAGE>

The  following  tables  and  commentary  provide  financial  information  on the
Insurance Underwriting segment.


INSURANCE UNDERWRITING
(millions)          Years ended December 31           1998      1997      1996
==============================================================================
Revenue:
  Direct sales                                      $1,053    $1,035    $1,030
  Extended warranty                                    643       574       464
  Specialty and other                                  250       249       280
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total revenue                                        1,946     1,858     1,774
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Benefits to policyholders                              896       842       790
Operating expenses                                     551       530       512
Amortization of deferred acquisition costs             216       208       208
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total benefits and expenses                          1,663     1,580     1,510
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax excluding special charges     283       278       264
Special charges                                         --        --        12
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Income before income tax                            $  283    $  278    $  252
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Identifiable assets at December 31                  $5,213    $4,936    $4,786
==============================================================================

Revenue was $1.9 billion in 1998,  up 5% from 1997,  primarily  due to growth in
the worldwide mechanical extended warranty lines and in the U.S. electronics and
appliance lines.  Direct sales business had modest growth  reflecting  difficult
market  conditions  for  accident,  while life and health  grew  satisfactorily.
Direct sales  continued  to expand its product  distribution  through  work-site
marketing  programs.  The run-off of certain specialty liability programs is now
substantially complete, while auto credit business continues to run off. Revenue
includes investment income allocated to this operating segment.  See "Investment
Operations."


INSURANCE UNDERWRITING
(millions)          Years ended December 31           1998      1997      1996
==============================================================================
Revenue:
  United States                                     $1,366    $1,308    $1,287
  United Kingdom                                       290       274       223
  Europe                                               117       102        84
  Rest of World                                        173       174       180
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------------------
Total revenue                                       $1,946    $1,858    $1,774
==============================================================================


U.S.  revenue of $1.4 billion was up 4% in 1998 while  European  revenue of $407
million rose 8%, principally due to growth in revenues for capital  accumulation
and extended warranty  products.  In addition,  there was a higher volume of new
business  in  the  appliance  and  electronics  extended  warranty  lines,  both
domestically and internationally. Rest of world revenue declined slightly.

                                     - 22 -
<PAGE>
Pretax  income was $283  million  in 1998,  up 2% from $278  million  last year.
Extended  warranty  business  improved  its  pretax  margin  in part due to good
general expense  controls and to improved loss  experience,  particularly in the
U.S.  appliance and  electronics  lines.  Higher expense ratios  associated with
start-up costs in the direct sales worksite marketing initiative and investments
in new product  development in the extended  warranty  lines  contributed to the
modest improvement in pretax income results in 1998.


CORPORATE AND OTHER
Revenue consists  primarily of investment income (including income on disposals)
which  is  not  otherwise  allocated  to  operating  segments.  See  "Investment
Operations."  Corporate  operating  expenses include  administrative and certain
information technology costs.


CORPORATE AND OTHER
(millions)          Years ended December 31               1998      1997    1996
================================================================================
Total revenue                                           $  150    $  119  $  112
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Operating expenses                                          60        26      20
Interest expense                                            87        70      40
Amortization of intangibles                                 86        81      37
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Total expenses                                             233       177      97
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Income (loss) before income tax excluding
  special charges                                          (83)      (58)     15
Special charges                                             --        27       3
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Income (loss) before income tax                         $  (83)   $  (85) $   12
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Identifiable assets at December 31                      $5,319    $5,232  $3,912
================================================================================

Revenue  increased 26% or $31 million in 1998  primarily due to higher levels of
investment income from private equity and limited partnership  holdings.  Income
from these investments varies significantly  between periods and can result from
disposal of investments at the time they become public as well as  distributions
in the form of  securities  or cash.  The loss  before  income  tax and  special
charges  increased $25 million over 1997.  Contributing to the loss in 1998 were
financing  costs and goodwill  amortization  related to  acquisitions  and costs
related to investments in information technology.


DISCONTINUED OPERATIONS
Discontinued  operations  in 1998 and 1997 are  composed  of  certain  insurance
underwriting  subsidiaries  acquired  with A&A that are currently in run-off and
the indemnification by A&A of certain liabilities  relating to subsidiaries sold
by A&A prior to Aon's  acquisition.  Management  believes that, based on current
estimates,  these discontinued operations are adequately reserved. The liability
is included as a component of other  liabilities on the consolidated  statements
of financial position.

                                     - 23 -
<PAGE>
Discontinued  operations in 1996 were composed principally of U.S. based capital
accumulation  products and direct  response  insurance  products.  The after-tax
income on these  businesses  has been  segregated  as "Income From  Discontinued
Operations" in the consolidated statements of income. With the completion of the
sales of UFLIC and LOV on April 1, 1996,  there were no  operating  results from
these discontinued operations going forward.


INCOME TAX AND NET INCOME
The following discussion is on a dilutive basis. Basic net income on a per share
basis was $3.16 and $1.71 in 1998 and 1997, respectively.

Net income for 1998 was $541 million or $3.11 per share compared to $299 million
or $1.68 per share in 1997.  Net income for fourth quarter 1998 amounted to $139
million or $0.79 per share compared to $113 million or $0.65 per share for 1997.
The increase in the 1998 net income and related per share amount was  influenced
primarily  by the  after-tax  1997 special  charges of $108  million  ($0.64 per
share) with no comparable amount in 1998.  Dividends on the redeemable preferred
stock in 1998 and dividends on the 8% and  redeemable  preferred  stocks in 1997
have been  deducted  from net  income  to  compute  earnings  per  share.  Aon's
effective income tax rate was 37.5% in 1998 and 1997.

Dilutive average shares  outstanding for 1998 increased 1% when compared to 1997
due  primarily to the  reissuance  of common  shares from  treasury for employee
benefits and for business combinations.


LIQUIDITY
Consistent with financial  statement  presentation,  the following cash flow and
financial position discussion primarily is influenced by brokerage acquisitions.
In addition,  the sales of UFLIC and LOV in 1996 have significantly impacted the
consolidated statements of equity and cash flows.

Aon's operating subsidiaries anticipate that there will be adequate liquidity to
meet their needs in the foreseeable  future.  Aon's routine  liquidity needs are
primarily  for  servicing  its debt and for the  payment of  dividends  on stock
issues and the capital  securities.  Dividends from Aon's  subsidiaries  are the
primary  source for  meeting  these  requirements.  After  meeting  its  routine
dividend and debt servicing  requirements,  Aon used a majority of the remaining
dividends  received  throughout  the year to invest in  acquisitions  within the
operational   segments  of  its   businesses.   There  are  certain   regulatory
restrictions  relating to dividend  capacity of insurance  subsidiaries that are
discussed in note 8. Insurance  subsidiaries'  statutory  capital and surplus at
year-end 1998 again exceeded the  risk-based  capital target set by the National
Association of Insurance  Commissioners by a satisfactory level. At December 31,
1998, Aon had back-up lines of credit available of $1.1 billion to support Aon's
commercial paper borrowings which were $436 million at December 31, 1998.

The businesses of Aon's operating  subsidiaries  continue to provide substantial
positive cash flow.  Brokerage cash flow has been used primarily for acquisition
related activities.  Given Aon's fixed maturity  portfolio's average life of 5.2
years,  access to lines of credit, and an uninterrupted  trend in Aon's positive
cash  flow,  Aon  expects  sufficient  cash  flow to meet  both  short-term  and
long-term cash needs.

                                     - 24 -
<PAGE>
Cash flow from operations increased $80 million from 1997 to $864 million.  This
increase  primarily  reflects  1998  brokerage  acquisitions,  the timing of the
settlement  of  insurance  segment  receivables  and  payables,  and payments on
special charges and valuation adjustments relating to the acquisitions.

Investing activities used cash of $1.4 billion in 1998, which was made available
from financing and operating activities.  Investing activities used cash of $1.4
billion in 1997 primarily for brokerage acquisitions.

Cash  totaling $132 million was provided by financing  activities  in 1998.  The
decrease  from $1.3 billion in 1997 is  primarily a result of the proceeds  from
the sale of the Capital  Securities and  short-term  borrowings in 1997. The net
cash provided from capital  accumulation  product  deposits and  withdrawals was
$298 million in 1998.  Cash was used to pay  dividends of $192 million on common
stock and $2 million on redeemable preferred stock.

Total assets increased $997 million to $19.7 billion, primarily due to brokerage
acquisitions.  Invested  assets at December 31, 1998 increased $530 million from
year-end 1997 levels,  primarily due to higher levels of short-term  investments
relating to brokerage fiduciary funds.


YEAR 2000 READINESS DISCLOSURE

AON'S STATE OF READINESS
Aon is  affected  by both  its own  computer  information  systems  and by third
parties  with which it has business  relationships,  in the  processing  of data
relating to the Year 2000 and beyond.  Aon began work on the computer  Year 2000
issue in 1995 and expects to  complete  its efforts by  mid-1999.  In 1997,  Aon
designated a full-time Year 2000 project  coordinator who established Aon's Year
2000 project office to monitor the progress of and act as a central  contact for
its major business units worldwide. Year 2000 efforts under the direction of the
Aon Executive Vice President of Business Systems Solutions are focused primarily
on two areas: internal systems readiness and readiness of carriers with whom Aon
places insurance business on behalf of its clients.

INFORMATION TECHNOLOGY (IT)
In a  corporate-wide  Year 2000  readiness  analysis  completed  in early  1998,
individual  business units were required to formally  develop plans,  where they
had not already done so, to achieve Year 2000  compliance,  and to provide their
plans to the  project  office.  Each  plan  consisted  of an  evaluation  of the
compliance  status of  internal  IT systems  and an  identification  of specific
hardware and software compliance issues. As a result of this effort, the project
office is  currently  tracking  over 200  worldwide  business  unit plans.  Each
business  unit is required to report its progress  against its plan on a monthly
basis to the project office. It is each business unit's responsibility to ensure
that adequate testing of systems is performed to ensure Year 2000 functionality.

The original readiness target date to remediate or replace most mission critical
applications was December 31, 1998, with all business units expected to be fully
compliant by mid-1999.  Testing on some of these  systems will continue into the
first half of 1999. Business units have made good progress and are well along in
the process of replacing or modifying  applications  found to be  non-compliant.
During  January 1999, a business unit readiness  review and risk  assessment for
each business unit was  performed.  Dates were  established  for internal  audit
reviews of test  documentation for selected units.  Business units were put on a
watch list if any  mission  critical  application  replacement,  remediation  or
testing  appeared  to extend  into third  quarter  1999.  Contingency  plans are
required for business units with 

                                     - 25 -
<PAGE>
mission  critical  systems on the watch list. An analysis of all newly  acquired
business units is completed  immediately after acquisition and appropriate plans
are put into action.

Progress and concerns are reported to Aon's senior and business unit management.
A written  report is being  prepared for management for any business unit with a
mission  critical  application  on the watch list.  These  applications  will be
tracked by the Year 2000 program office and reported to management monthly.


NON-IT
With  respect to non-IT  issues,  a project  coordinator  is working  with Aon's
facilities  management  and third  party  leasing  management  company to ensure
premises  issues are addressed in Aon-owned and leased  properties in the United
States. Outside of the U.S., local chief financial officers have been instructed
to make similar  inquiries.  The results of these efforts were reviewed for U.S.
and European  locations as of December 31, 1998. Some relatively  minor problems
were uncovered and are in the process of being fixed. The majority of the issues
were with personal computer-based facility management systems.

Aon has some risk on a  location  by  location  basis  related  to the  possible
failure  of   government   agencies,   public   utilities   and   providers   of
telecommunication  and  transportation  services.  Due to  Aon's  dispersion  of
facilities,  the largest  concentrated  risks in this regard are in the Chicago,
New York and London locations.


THIRD PARTIES
Third parties having a material  relationship  with Aon have Year 2000 issues to
address and resolve.  Such third parties primarily include issuers of investment
securities,  financial  institutions,  governmental agencies,  telecommunication
companies and insurance carriers.  An aspect of the project is to identify these
third parties and contact them to seek written assurance as to the third party's
anticipation of being Year 2000 compliant. The nature of Aon's follow-up depends
upon its  assessment  of the  response and of the  materiality  of the effect of
non-compliance by third parties on Aon.  Significant third parties determined to
be at risk for Year 2000 failure will be reported to appropriate  Aon management
for possible  preemptive  action to minimize adverse impact on Aon's operations.
As of December 31, 1998, Aon is not aware of any significant  third party with a
Year 2000  issue that  would  materially  impact  Aon's  results of  operations,
liquidity or capital resources.  However, Aon has no means of ensuring that such
third  parties  will be Year 2000  ready.  The  inability  of third  parties  to
complete their Year 2000 resolution process in a timely fashion could materially
impact Aon. The effect of non-compliance by third parties is not determinable.

Aon is compiling information on and assessing the compliance status of insurance
carriers  with whom it places  business  on  behalf of its  clients.  Compliance
questionnaires  have been sent to  approximately  2,700 carriers  worldwide.  An
intensive  follow-up  effort,  focusing on U.S. carriers who receive the bulk of
insurance  placements by U.S.  business  units,  has produced a response rate of
close to 100%. A similar  follow-up  effort for  significant  non-U.S.  carriers
(being  executed in London)  continues  and is expected to be completed by March
31,  1999.  Further  follow-up  on  remaining  carriers  only doing  business in
specific countries is in process by the business units in those countries and is
expected to be completed by June 30, 1999.

                                     - 26 -
<PAGE>
COSTS TO ADDRESS AON'S YEAR 2000 ISSUES
As of December  31,  1998,  Aon's Year 2000  remediation  costs for all business
units is projected to be  approximately  $70 million through  December 31, 1999.
This projection includes an additional $5 million, from that previously reported
as of September 30, 1998, for fourth quarter 1998  acquisitions  where Year 2000
analysis is underway  but not  completed as of January 31, 1999 and for any 1999
acquisitions.  At  year-end  1997,  Aon  estimated  its  Year  2000  costs to be
approximately  $50 million.  The revised  estimate was  established as a part of
Aon's  comprehensive  1999 budget process which  identified $70 million in total
Year 2000 costs.  These costs are being funded  through  business unit operating
cash flows.

The increase  from $50 million to $70 million for Aon's total Year 2000 costs is
attributable to the following: (1) acquisitions which increased Year 2000 costs;
(2) analysis and testing of Year 2000 issues which had not been  anticipated  at
year-end 1997; and (3) the necessity in several instances to invoke  contingency
plans and remediate systems Aon originally  planned to replace.  Replacement was
not considered a Year 2000 cost.

As of December 31, 1998, Aon has incurred  approximately  $43 million related to
all  phases of the Year 2000  project.  Of the total  remaining  project  costs,
approximately $27 million will be incurred and expensed in 1999.


RISKS OF AON'S YEAR 2000 ISSUES
Aon's  management  believes it has an effective  program in place to resolve the
Year 2000 issue in a timely  manner.  As noted above,  Aon has not yet completed
all necessary Year 2000 program activities for all mission critical applications
for all 200 business units being tested. In addition,  disruption in the economy
generally resulting from Year 2000 issues could also materially adversely affect
Aon.  The  amount  of  potential  liability  and lost  revenue  related  to that
disruption  cannot  be  reasonably  estimated  at  this  time.  With  regard  to
non-compliance  resulting  from Aon's IT systems,  Aon will devote its financial
and personnel  resources to remediate problems as soon as detected.  With regard
to non-compliance  resulting from third party failure,  Aon is in the process of
determining,  through responses and other appropriate action, where there is any
material  likelihood of  non-compliance  having a potentially  material  impact;
however, the potential impact and related costs are not known at this time.


AON'S CONTINGENCY PLANS
Contingency  planning at Aon has two  distinct  components.  First,  where Aon's
planned  completion dates for IT system  replacement or remediation could extend
into the third quarter 1999,  contingency plans are required.  These contingency
issues are being developed on a business unit basis. Contingency plans have been
successfully  invoked  for a number of  business  units to date.  These  include
changing compliance  strategies from replacement to remediation (and vice versa)
and partial  remediation  to meet critical  dates prior to January 1, 2000.  The
latter will require completion of remediation in 1999. Second, preparations must
be made for IT software and hardware that have Year 2000 "bugs" and that are not
revealed  until after  December  31,  1999,  despite  testing.  Aon  anticipates
handling these situations with immediate program fixes,  swapped backup hardware
or process  work-around.  Aon does not  anticipate  that problems of this nature
will be significant due to thorough testing and the distributed  nature of Aon's
systems.

                                     - 27 -
<PAGE>
INVESTMENT OPERATIONS
Aon invests in broad asset  categories  related to its  diversified  operations.
Investments  are  managed  with  the  objective  of  maximizing  earnings  while
monitoring   asset  and  liability   durations,   and   considering   regulatory
requirements.

Aon maintains  well-capitalized  operating companies.  The financial strength of
these companies permits a diversified  investment  portfolio  including invested
cash, fixed income obligations, and public and private equities.

Investment  characteristics  mirror liability  characteristics of the respective
operating  units.  Aon's  insurance  brokerage and other services and consulting
businesses invest fiduciary funds in shorter term obligations and income derived
from these investments is allocated to the revenues of those operating segments.
Investments   underlying   interest-sensitive   capital  accumulation  insurance
products  are  fixed or  floating  rate  obligations  to match  the  appropriate
liability  characteristics.  Indemnity and other types of non-interest sensitive
insurance  liabilities  are  primarily  supported by  intermediate  to long-term
duration instruments.  Income from those fixed maturity investments is allocated
to revenues of the insurance underwriting segment.

Invested assets and related  investment  income not directly required to support
insurance brokerage, consulting and underwriting businesses are allocated to the
corporate segment. These assets, primarily  publicly-traded equities, as well as
longer-term, less liquid private placements and limited partnerships,  represent
a more aggressive  investment  strategy that provides an opportunity for greater
yields.  Seeking these  enhanced  returns is designed,  among other  things,  to
counter the additional  expenses  associated  with recent  acquisitions,  namely
goodwill  amortization and financing costs. The investment  strategy employed in
the corporate segment leads to greater  variability in investment income than is
the case of  investments  supporting  the insurance  brokerage,  consulting  and
underwriting businesses.

With a carrying value of $3.1 billion,  Aon's total fixed maturity  portfolio is
invested primarily in investment grade holdings (95%) and has a fair value which
is 104% of amortized cost.


INVESTED ASSETS
(millions)               As of December 31               1998      1997
=======================================================================
Short-term investments                                 $2,221    $1,698
Fixed maturities                                        3,103     3,144
Equity securities                                         768       806
Other                                                     360       274
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------
Total invested assets                                  $6,452    $5,922
=======================================================================



INVESTMENT INCOME
(millions)          Years ended December 31              1998    1997   1996
============================================================================
Insurance brokerage and other services 
  (primarily short-term investments)                     $194    $163   $ 80
Consulting                                                  6       6      3
Insurance underwriting (primarily fixed maturities)       240     214    197
Corporate and other                                       150     117    112
- - - - - - - - - - - - - - - - - ----------------------------------------------------------------------------
Investment income                                        $590    $500   $392
============================================================================

                                     - 28 -
<PAGE>
MARKET RISK EXPOSURE
Aon  is  subject  to  market  risk   exposures  of  varying   correlations   and
volatilities,  including  foreign  exchange  rate risk,  interest  rate risk and
equity  price  risk.  The  following  disclosure  reflects  estimates  of future
performance and economic conditions. Actual results may differ.

Aon is  subject  to  foreign  exchange  rate risk  associated  with  translating
financial   statements   of  its  foreign   subsidiaries   into  U.S.   dollars.
Additionally,   certain  of  Aon's  foreign  subsidiaries  receive  revenues  in
currencies that differ from the currency in which their  operating  expenses are
denominated.  Aon's primary  exposures are  associated  with the British  Pound,
other European  currencies,  the Canadian Dollar and the Australian  Dollar. Aon
uses forward  contracts and over the counter options,  as well as listed foreign
currency  futures and options on futures to protect against adverse  transaction
and  translation  effects  due to  exchange  rate  fluctuations.  The  potential
decrease to Aon's  consolidated  equity at December  31, 1998  resulting  from a
hypothetical  10% adverse change in quoted year-end  foreign  currency  exchange
rates  amounts to $130 million and $120 million,  respectively,  at December 31,
1998 and  1997.  The  impact  to 1998 and 1997  pretax  income in the event of a
hypothetical 10% adverse change in the respective quoted year-end exchange rates
would not be material after consideration of derivative positions.

Due to the  nature of Aon's  businesses,  operating  earnings  are  affected  by
changes in  international  and domestic  short-term  interest rates.  Aon hedges
against   fluctuations   in  short-term   interest  rates  with  Eurodollar  and
Eurosterling  futures  contracts,  interest rate swaps and interest rate caps. A
hypothetical  1%  decrease  in  interest  rates  would have a  decrease,  net of
derivative  positions,  of $24  million to 1998 and 1997  pretax  income.  Aon's
earnings  are also  affected  by  interest  rate  risks  related  to  short-term
borrowings.  A  hypothetical  1% decrease  in  short-term  interest  rates would
correspondingly decrease Aon's interest expense by $8 million for 1998 and 1997,
partially offsetting the loss of short-term investment income.

The valuation of Aon's fixed maturity portfolio is subject to long-term interest
rate risk.  Aon generally  uses  treasury  options and futures and interest rate
swaps to hedge the value of the fixed  maturity  portfolio.  A  hypothetical  1%
increase  in  long-term  interest  rates  would  decrease  the fair value of the
portfolio  at  December  31,  1998 and 1997,  net of  derivative  positions,  by
approximately  $133 million and $155  million,  respectively.  Aon has long-term
notes  payable  and  capital  securities  outstanding  with a fair value of $1.5
billion at December  31, 1998 and 1997.  Such fair value  exceeded  the carrying
value  by $125  million  and  $106  million  at  December  31,  1998  and  1997,
respectively.  A  hypothetical  1% decrease in interest rates would increase the
fair value by approximately 10% at December 31, 1998 and 1997.

The valuation of Aon's  marketable  equity  portfolio is subject to equity price
risk.  If market  prices  were to  decrease  10%,  the fair  value of the equity
portfolio  would have a  corresponding  decrease of $77 million  compared to $81
million at  December  31,  1997.  At December  31, 1998 and 1997,  there were no
outstanding derivatives hedging the price risk on the equity portfolio.

Aon has made adequate  plans to address the system  modifications  necessary for
full  conversion  to the euro.  The euro  conversion  is not  expected to have a
material impact on Aon's European operations.


                                     - 29 -
<PAGE>
CAPITAL RESOURCES
In order to achieve tax efficient  financing,  Aon Corporation  established,  in
June 1998,  a  committed  bank credit  facility  under  which  certain  European
subsidiaries  can borrow up to a maximum of $470 million on a revolving basis. A
total of $350 million is committed  for five years and $120 million is committed
for 364 days.  As of  December  31,  1998,  there were six loans  totaling  $408
million  outstanding  under the facility.  Short-term  borrowings  increased $80
million in 1998 when compared to 1997,  primarily  attributable  to  outstanding
loans  under the  European  bank credit  facility.  Short-term  borrowings  were
largely used for acquisition  activity.  Notes payable  decreased in 1998 by $57
million  when  compared to year-end  1997.  Aon's  6.875% debt  securities,  due
October 1, 1999, are anticipated to be redeemed at 100% of the principal  amount
plus accrued interest.

Aon Corporation borrows funds from and lends funds to its various  subsidiaries.
As of December 31, 1998, Aon Corporation held obligations to its subsidiaries of
approximately  $600  million.  Generally,  these  obligations  have  competitive
interest rates.

In 1998,  common  stockholders'  equity per share  increased to $17.74,  up from
$16.80 in 1997.  The  increase  consisted of net income  partially  offset by an
other  comprehensive  loss of $219 million and dividends to stockholders of $194
million.


                                     - 30 -
<PAGE>
CONSOLIDATED STATEMENTS OF INCOME

(millions except per share data) Years ended December 31   1998    1997    1996
===============================================================================
REVENUE
   Brokerage commissions and fees                        $4,197  $3,605  $1,919
   Premiums and other                                     1,706   1,646   1,577
   Investment income (note 4)                               590     500     392
                                                         ----------------------
      Total revenue                                       6,493   5,751   3,888
===============================================================================
EXPENSES
   General expenses                                       4,457   4,176   2,536
   Benefits to policyholders                                896     842     790
   Interest expense                                          87      70      40
   Amortization of intangible assets                        122     121      76
                                                         ----------------------
      Total expenses                                      5,562   5,209   3,442
===============================================================================
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAX AND
   MINORITY INTEREST                                        931     542     446
   Provision for income tax (note 6)                        349     203     154
                                                         ----------------------
INCOME FROM CONTINUING OPERATIONS BEFORE MINORITY INTEREST  582     339     292
   Minority interest, net of tax--Company-obligated 
      mandatorily redeemable preferred capital securities 
      (note 8)                                              (41)    (40      --
                                                         ----------------------
INCOME FROM CONTINUING OPERATIONS                           541     299     292

DISCONTINUED OPERATIONS (NOTE 3)
   Income from discontinued operations, net of tax           --      --      22
   Gain on sale of discontinued operations, net of tax       --      --      21
                                                         ----------------------
NET INCOME                                               $  541  $  299  $  335
===============================================================================
NET INCOME AVAILABLE FOR COMMON STOCKHOLDERS             $  538  $  287  $  316
===============================================================================
DILUTIVE PER SHARE
   Income from continuing operations                     $ 3.11  $ 1.68  $ 1.64
   Discontinued operations                                   --      --    0.26
                                                         ----------------------
   Net income                                              3.11    1.68    1.90
                                                         ----------------------
BASIC PER SHARE
   Income from continuing operations                       3.16    1.71    1.67
   Discontinued operations                                   --      --    0.26
                                                         ----------------------
   Net income                                              3.16    1.71    1.93
                                                         ----------------------

Cash Dividends Per Share Paid on Common Stock            $ 1.10  $ 1.02  $ 0.95
===============================================================================
DILUTIVE AVERAGE COMMON AND COMMON EQUIVALENT
   SHARES OUTSTANDING                                     172.9   170.5   168.9
===============================================================================
See accompanying notes to consolidated financial statements.


                                     - 31 -
<PAGE>
CONSOLIDATED STATEMENTS OF FINANCIAL POSITION

(millions)                        As of December 31                1998    1997
===============================================================================

ASSETS

INVESTMENTS
   Fixed maturities--at fair value                              $ 3,103 $ 3,144
   Equity securities--at fair value                                 768     806
   Short-term investments                                         2,221   1,698
   Other investments                                                360     274
                                                                 --------------
      Total investments                                           6,452   5,922

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


CASH                                                                723   1,085

RECEIVABLES
   Insurance brokerage and consulting                             5,423   5,320
   Premiums and other                                             1,120     863
   Accrued investment income                                         63      67
                                                                 --------------
      Total receivables (net of allowance for doubtful 
        accounts: 1998-$99; 1997-$86)                             6,606   6,250


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


DEFERRED INCOME TAXES                                               214     137

DEFERRED POLICY ACQUISITION COSTS                                   573     549

INTANGIBLE ASSETS
   (net of accumulated amortization: 1998-$1,101; 1997-$979)      3,500   3,094

OTHER ASSETS                                                      1,620   1,654

- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   TOTAL ASSETS                                                 $19,688 $18,691
===============================================================================
See accompanying notes to consolidated financial statements.


                                     - 32 -
<PAGE>

(millions)                        As of December 31                1998    1997
===============================================================================

LIABILITIES AND STOCKHOLDERS' EQUITY

INSURANCE PREMIUMS PAYABLE                                      $ 6,948 $ 6,380

POLICY LIABILITIES
   Future policy benefits                                           986     943
   Policy and contract claims                                       779     809
   Unearned and advance premiums                                  1,797   1,870
   Other policyholder funds                                       1,261     828
                                                                 --------------
      Total policy liabilities                                    4,823   4,450


GENERAL LIABILITIES
   General expenses                                               1,259   1,489
   Current income taxes                                             156     180
   Short-term borrowings                                            844     764
   Notes payable                                                    580     637
   Other liabilities                                              1,211   1,119
                                                                 --------------
   TOTAL LIABILITIES                                             15,821  15,019
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------


COMMITMENTS AND CONTINGENT LIABILITIES

REDEEMABLE PREFERRED STOCK                                           50      50

COMPANY-OBLIGATED MANDATORILY REDEEMABLE PREFERRED CAPITAL
   SECURITIES OF SUBSIDIARY TRUST HOLDING SOLELY THE COMPANY'S
   JUNIOR SUBORDINATED DEBENTURES                                   800     800

STOCKHOLDERS' EQUITY
   Common stock--$1 par value
      Authorized--300 shares; issued                                172     172
   Paid-in additional capital                                       450     377
   Accumulated other comprehensive income (loss)                   (116)    103
   Retained earnings                                              2,782   2,463
   Treasury stock at cost (shares: 1998-1.5; 1997-3.5)              (58)    (93)
   Deferred compensation                                           (213)   (200)
                                                                 --------------
   TOTAL STOCKHOLDERS' EQUITY                                     3,017   2,822
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                   $19,688 $18,691
===============================================================================

                                     - 33 -
                                     
<PAGE>
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(millions)                     Years ended December 31     1998    1997    1996
===============================================================================
PREFERRED STOCK  Balance at January 1                    $   --  $    5  $    8
   Retirement and conversion of preferred stock              --      (5)     (3)
                                                         ----------------------
                                                             --      --       5
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
COMMON STOCK  Balance at January 1                          172     114     111
   Effect of three-for-two stock split                       --      57      --
   Shares issued for business combinations                   --       1      --
   Conversion of preferred stock to common stock             --      --       3
                                                         ----------------------
                                                            172     172     114
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
PAID-IN ADDITIONAL CAPITAL  Balance at January 1            377     475     432
   Effect of three-for-two stock split                       --     (57)     --
   Stock awards                                              73      79      55
   Adjustment for business combinations                      --      11       2
   Retirement and conversion of preferred stock              --    (131)    (14)
                                                         ----------------------
                                                            450     377     475
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)  
     Balance at January 1                                   103     154     125 
   Net unrealized investment gains (losses)                (111)     36      30
   Net foreign exchange losses                              (12)    (87)     (1)
   Net additional minimum pension liability adjustment      (96)     --      --
                                                         ----------------------
   Other comprehensive income (loss)                       (219)    (51)     29
                                                         ----------------------
                                                           (116)    103     154
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
RETAINED EARNINGS  Balance at January 1                   2,463   2,357   2,212
   Net income                                               541     299     335
   Dividends to stockholders                               (194)   (180)   (172)
   Loss on treasury stock reissued                          (30)     (7)    (16)
   Adjustment for business combinations                       2      (6)     (2)
                                                         ----------------------
                                                          2,782   2,463   2,357
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
TREASURY STOCK  Balance at January 1                        (93)   (121)    (97)
   Cost of shares acquired                                  (44)    (12)    (66)
   Shares reissued at average cost                           79      40      42
                                                         ----------------------
                                                            (58)    (93)   (121)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
DEFERRED COMPENSATION  Balance at January 1                (200)   (151)   (117)
   Issuance of stock awards                                 (54)    (81)    (57)
   Debt guarantee of employee stock ownership plan           16      13      11
   Amortization of deferred compensation                     25      19      12
                                                         ----------------------
                                                           (213)   (200)   (151)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
STOCKHOLDERS' EQUITY AT DECEMBER 31                      $3,017  $2,822  $2,833
===============================================================================

COMPREHENSIVE INCOME
   NET INCOME                                            $  541  $  299  $  335
   OTHER COMPREHENSIVE INCOME (LOSS)                       (219)    (51)     29
                                                         ----------------------
   COMPREHENSIVE INCOME                                  $  322  $  248  $  364
                                                         ======================

See accompanying notes to consolidated financial statements.


                                     - 34 -
                                     
<PAGE>
CONSOLIDATED STATEMENTS OF CASH FLOWS

(millions)                     Years ended December 31     1998    1997    1996
===============================================================================
CASH FLOWS FROM OPERATING ACTIVITIES
   Net income                                            $  541   $ 299   $ 335
   Adjustments to reconcile net income to cash 
    provided by operating activities
      Policy liabilities                                     28    (155)    767
      Deferred policy acquisition costs                    (236)   (164)   (213)
      Amortization of deferred policy acquisition costs     216     208     236
      Amortization of intangible assets                     122     121      79
      Other amortization and depreciation                   146     121      65
      Other                                                  47     354    (893)
      Gain on sale of discontinued operations                --      --     (21)
                                                          ---------------------
         CASH PROVIDED BY OPERATING ACTIVITIES              864     784     355
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
CASH FLOWS FROM INVESTING ACTIVITIES
   Sale of investments
      Fixed maturities
         Maturities                                         107     105     135
         Calls and prepayments                              108     156     204
         Sales                                            2,062   2,175     980
      Equity securities                                   2,176   1,827     636
      Other investments                                      51      55     200
   Purchase of investments
      Short-term--net                                      (534)    (31)    (65)
      Fixed maturities                                   (2,257) (2,767) (1,843)
      Equity securities                                  (2,253) (1,724)   (661)
      Other investments                                    (141)   (111)   (302)
   Acquisition of subsidiaries                             (374) (1,649)   (342)
   Disposition of subsidiaries                               --      --   1,370
   Acquired fiduciary funds from acquisitions                --     734      --
   Property and equipment and other                        (300)   (146)    (75)
                                                          ---------------------
         CASH PROVIDED (USED) BY INVESTING ACTIVITIES    (1,355) (1,376)    237
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
CASH FLOWS FROM FINANCING ACTIVITIES
   Treasury stock transactions--net                         (18)     21     (40)
   Issuance (repayment) of short-term borrowings--net        80     542    (139)
   Issuance of mandatorily redeemable preferred capital
     securities                                              --     800      --
   Repayment of long-term debt                              (34)    (74)     (6)
   Interest sensitive life, annuity and investment contracts
      Deposits                                              435     373     508
      Withdrawals                                          (137)    (44)   (437)
   Retirement of preferred stock                             --    (136)    (14)
   Cash dividends to stockholders                          (194)   (182)   (173)
                                                          ---------------------
         CASH PROVIDED (USED) BY FINANCING ACTIVITIES       132   1,300    (301)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   EFFECT OF EXCHANGE RATE CHANGES ON CASH                   (3)    (33)      4
   INCREASE (DECREASE) IN CASH                             (362)    675     295
   CASH AT BEGINNING OF YEAR                              1,085     410     115
                                                          ---------------------
CASH AT END OF YEAR                                        $723  $1,085   $ 410
===============================================================================
See accompanying notes to consolidated financial statements.

                                     - 35 -
<PAGE>
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES AND PRACTICES

PRINCIPLES OF CONSOLIDATION
The  accompanying  consolidated  financial  statements  have  been  prepared  in
conformity  with  generally  accepted  accounting  principles  and  include  the
accounts  of  Aon  Corporation  and  its  operating  subsidiaries  (Aon).  These
statements  include  informed  estimates and assumptions that affect the amounts
reported.  Actual results could differ from the amounts  reported.  All material
intercompany accounts and transactions have been eliminated.


SEGMENT INFORMATION
Aon  classifies  its  business  into three major  segments  based on the type of
service or product and a fourth  nonoperating  segment.  The Insurance Brokerage
and Other Services  segment is comprised of retail,  reinsurance,  specialty and
wholesale  brokerage  operations.  The Consulting  segment is comprised of Aon's
human resource consulting  organization.  The Insurance  Underwriting segment is
comprised  of direct  sales life and  accident  and health,  extended  warranty,
specialty and other insurance products. The Corporate and Other segment revenues
consist  primarily  of  investment  income on capital.  The segment  information
located  in the  tables  on  pages  15  through  28 is  incorporated  herein  by
reference.

Amounts reported in the tables for the four segments, when aggregated,  total to
the amounts in the accompanying consolidated financial statements.  Revenues are
attributed to geographic areas based on the location of the resources  producing
the  revenues.  There are no  material  intersegment  amounts to be  eliminated.
Long-lived assets and related depreciation are not material.

The  foregoing  segment  information  is prepared in conformity  with  Financial
Accounting  Standards Board (FASB) Statement No. 131 "Disclosures about Segments
of an Enterprise and Related Information" that Aon adopted as required for 1998.
Previously reported segment information was restated.


BROKERAGE COMMISSIONS AND FEES
In  general,  commission  income is  recognized  at the later of the  billing or
effective  date  of the  related  insurance  policies.  Contingent  commissions,
certain life insurance  commissions  and commissions on premiums billed directly
by  insurance  companies  are  generally  recognized  as income  when  received.
Commissions  on  premium  adjustments,   including  policy  cancellations,   are
recognized  as they  occur.  Fees for  claim  administration  services,  benefit
consulting,  reinsurance  services and other  services are  recognized  when the
services are rendered.


PREMIUM REVENUE
In general,  for accident and health and extended  warranty  products,  premiums
collected are reported as earned in proportion to insurance  protection provided
over the  period  covered  by the  policies.  For life  products,  premiums  are
recognized as revenue when due.


REINSURANCE
Reinsurance  premiums,  commissions  and  expense  reimbursements  on  reinsured
business are accounted for on a basis  consistent  with those used in accounting
for the original  policies  issued and the terms of the  reinsurance  contracts.
Premiums and benefits ceded to other companies have been reported as a reduction
of premium revenue and benefits.  Expense reimbursements  received in connection
with  reinsurance  ceded have been  accounted  for as a reduction of the related
policy  acquisition  costs or, to the  extent  such  reimbursements  exceed  the
related acquisition costs, as other revenue. Reinsurance receivables and prepaid
reinsurance premium amounts are reported as assets.


STOCK COMPENSATION PLANS
Aon applies  Accounting  Principles Board Opinion No. 25,  "Accounting for Stock
Issued  to  Employees,"  and  related  interpretations  in  accounting  for  its
stock-based  compensation plans.  Accordingly,  no compensation expense has been
recognized  for its  stock  option  plan as the  exercise  price of the  options
equaled the market price of the stock at the date of grant. Compensation expense
has been  recognized  for the Aon Stock Award Plan based on the market  price at
the date of the award.


SPECIAL CHARGES
In first quarter 1997, Aon recorded  pretax special charges of $145 million ($91
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 Alexander and Alexander  Services Inc.  (A&A).  The
restructuring  charges  included  costs related to severance and other costs and
the  consolidation of systems and real estate space. The  restructuring  charges
related to real estate space are being paid out over  several  years as planned.
Special charges for severance and related costs involved 600 positions.

In second quarter 1997, Aon recorded  pretax special charges of $27 million ($17
million after-tax or $0.10 per share) to 

                                     - 36 -
<PAGE>
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 second  quarter 1996,  Aon recorded a $30 million  pretax charge ($19 million
after-tax or $0.12 per share) related to a voluntary  early  retirement  program
for all eligible employees of Aon's United States (U.S.) operating  subsidiaries
and similar  programs in parts of Europe.  Approximately  450 employees,  60% of
whom were in the U.S., participated in the early retirement program.

In  fourth  quarter  1996,  Aon's  management  committed  to a  formal  plan  of
restructuring  Aon's European brokerage  operations as a result of the Bain Hogg
Group plc (Bain Hogg)  acquisition  and recorded  pretax special  charges of $60
million ($40 million  after-tax or $0.24 per share)  primarily  relating to this
activity.   The   restructuring   charges   included  $32  million  relating  to
consolidation  activities,  $12 million for workforce  reductions  involving 300
positions,  and $11  million  relating to the  reconstruction  of the Lloyd's of
London insurance market.

All  of  Aon's  special  charges  are  reflected  in  general  expenses  in  the
consolidated  statements  of  income.  A  summary  of  restructuring  activities
included in the 1997 and 1996 special charges and the related amounts  remaining
unpaid in the general expenses  liability at December 31, 1996, 1997 and 1998 is
as follows:


                                          Termination   Consolidation
(millions)                                   Benefits     and Other       Total
===============================================================================
1996
Expense accrued                            $       42   $       48   $       90
Cash payments                                      30           --           30
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Balance at December 31, 1996                       12           48           60

1997
Expense accrued                                    40          132          172
Cash payments                                      48           37           85
Asset write-offs                                   --           37           37
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Balance at December 31, 1997                        4          106          110

1998
Cash payments                                       4           26           30
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Balance at December 31, 1998                $      --   $       80   $       80
===============================================================================



INCOME TAX
Deferred  income tax has been provided for the effects of temporary  differences
between financial reporting and tax bases of assets and liabilities and has been
measured  using the enacted  marginal  tax rates and laws that are  currently in
effect.


COMPREHENSIVE INCOME
In 1998, Aon adopted FASB Statement No. 130  "Reporting  Comprehensive  Income."
Statement No. 130 requires net  unrealized  investment  gains or losses on Aon's
available-for-sale   securities,   net  foreign  exchange  gains  or  losses  on
translation and minimum pension  liability  adjustments,  which  previously were
reported  directly in stockholders'  equity, to be included in accumulated other
comprehensive income in the consolidated statements of financial position and in
the disclosure of comprehensive income. The totals of other comprehensive income
items and  comprehensive  income  (which  includes  net income),  are  displayed
separately in the consolidated  statements of stockholders' equity. The adoption
of this  statement  had no effect on net  income or  stockholders'  equity.  The
components of other comprehensive income (loss), and the related tax effects are
as follows:

                                                            Income
                                               Amount          Tax       Amount
Year ended December 31, 1998                   Before     (Expense)         Net
(millions)                                      Taxes      Benefit     of Taxes
===============================================================================
Unrealized holding losses arising
   during the year                         $     (130)  $       49   $      (81)
Less: reclassification adjustment                  47          (17)          30
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net unrealized investment losses                 (177)          66         (111)
Net foreign exchange losses                       (18)           6          (12)
Net additional minimum pension
   liability adjustment                          (155)          59          (96)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total other comprehensive loss             $     (350)  $      131   $     (219)
===============================================================================

                                                            Income
                                               Amount          Tax       Amount
Year ended December 31, 1997                   Before     (Expense)         Net
(millions)                                      Taxes      Benefit     of Taxes
===============================================================================
Unrealized holding gains arising
   during the year                         $       86   $      (32)  $       54
Less: reclassification adjustment                  29          (11)          18
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net unrealized investment gains                    57          (21)          36
Net foreign exchange losses                      (138)          51          (87)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total other comprehensive loss             $      (81)  $       30   $      (51)
===============================================================================

                                                            Income
                                               Amount          Tax       Amount
Year ended December 31, 1996                   Before     (Expense)         Net
(millions)                                      Taxes      Benefit     of Taxes
===============================================================================
Unrealized holding gains arising
   during the year                         $       58   $      (21)  $       37
Less: reclassification adjustment                  11           (4)           7
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net unrealized investment gains                    47          (17)          30
Net foreign exchange losses                        (2)           1           (1)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total other comprehensive income           $       45   $      (16)  $       29
===============================================================================

                                     - 37 -
<PAGE>

The components of accumulated other comprehensive  income (loss), net of related
tax, as of December 31, 1998, 1997 and 1996 are as follows:

(millions)                                       1998         1997         1996
===============================================================================
Net unrealized investment gains            $       78   $      189   $      153
Net foreign exchange gains (losses)               (98)         (86)           1
Net additional minimum pension liability          (96)          --           --
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Accumulated other comprehensive
   income (loss)                           $     (116)  $      103   $      154
===============================================================================


INCOME PER SHARE
Basic  income per share is  computed  based on the  weighted  average  number of
common shares outstanding,  excluding any dilutive effect of options, awards and
convertible  securities.  Common shares  outstanding  include  3,970,000 shares,
4,230,000  shares and 4,520,000 shares held by the employee stock ownership plan
in  1998,  1997  and  1996,  respectively.   Net  income  available  for  common
stockholders  is net of all preferred  dividends.  Dilutive  income per share is
computed based on the weighted-average  number of common shares outstanding plus
the dilutive effect of options, awards and convertible securities.  The dilutive
effect of options and awards is calculated under the treasury stock method using
the  average  market price for the period.   Income per share is  calculated  as
follows:

(millions except per share data)                 1998         1997         1996
===============================================================================
Income from continuing operations          $      541   $      299   $      292
8% preferred stock dividends                       --           (9)         (11)
Redeemable preferred stock dividends               (3)          (3)          (2)
                                           ------------------------------------
Continuing income for dilutive                    538          287          279
6.25% preferred stock dividends                    --           --           (5)
                                           ------------------------------------
Continuing income for basic                $      538   $      287   $      274
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Basic shares outstanding                          170          168          164
Common stock equivalents                            3            3            2
6.25% convertible preferred shares                 --           --            3
                                           ------------------------------------
Dilutive potential common shares                  173          171          169
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Dilutive net income per share              $     3.11   $     1.68   $     1.64
Basic net income per share                 $     3.16   $     1.71   $     1.67
===============================================================================



INVESTMENTS
Fixed  maturities  are  available  for sale and are carried at fair  value.  The
amortized cost of fixed  maturities is adjusted for  amortization of premiums to
the first call date and the accretion of discounts to maturity that are included
in investment  income.  Equity securities are carried at fair value.  Unrealized
gains and temporary  unrealized losses on fixed maturities and equity securities
are excluded from income and are recorded  directly to  stockholders'  equity in
accumulated other  comprehensive  income,  net of related deferred income taxes.
Other  investments are carried  generally at cost. Income or loss on disposal is
computed  using  specific  costs of  securities  sold and reported as investment
income.

Investments  that have declines in fair value below cost, which are judged to be
other than  temporary,  are written down to estimated fair values.  Reserves for
certain  other  investments  are  established  based  on an  evaluation  of  the
respective investment portfolio and current economic conditions.  Writedowns and
changes in  reserves  are  included  in  investment  income in the  consolidated
statements of income.  In general,  Aon ceases to accrue investment income where
interest or dividend payments are in arrears.

Accounting policies relating to derivative  financial  instruments are discussed
in note 11.


DEFERRED POLICY ACQUISITION COSTS
Costs of acquiring new and renewal insurance underwriting business,  principally
the excess of new commissions over renewal  commissions,  underwriting and sales
expenses  that vary with and are  primarily  related  to the  production  of new
business, are deferred and reported as assets. For long-duration life and health
products,  amortization of deferred policy  acquisition  costs is related to and
based on the  expected  premium  revenues  of the  policies.  In  general,  such
amortization  is adjusted to reflect  current  withdrawal  experience.  Expected
premium  revenues are estimated by using the same assumptions used in estimating
future  policy  benefits.   For  extended  warranty  and  short-duration  health
insurance,  costs of acquiring and renewing  business,  which are deferred,  are
amortized as the related premium is earned.


OTHER INTANGIBLE ASSETS
In general,  the excess of cost over net assets  purchased  relating to business
acquisitions  is being amortized into income over periods not exceeding 40 years
using the  straight-line  method.  The cost of other intangible  assets is being
amortized over a range of 4 to 25 years.


PROPERTY AND EQUIPMENT
Property and  equipment,  reported in other assets,  are  generally  depreciated
using the  straight-line  method over their estimated useful lives.  Included in
this  category is internal  use  software,  which is software  that is acquired,
internally  developed or modified solely to meet internal needs, with no plan to
market externally. Costs related to directly obtaining,  developing or upgrading
internal use software are capitalized. These costs are generally amortized using
the straight-line method over the life of the software.


FAIR VALUE OF FINANCIAL INSTRUMENTS
The  following  methods and  assumptions  were used to estimate  fair values for
financial  instruments.  The carrying amounts in the consolidated  statements of
financial  position  for  cash  and  cash  equivalents,   including   short-term
investments,  approximate  their fair value.  Fair value for fixed  maturity and

                                     - 38 -
<PAGE>
equity  securities is based on quoted market prices or, if they are not actively
traded,  on estimated values obtained from independent  pricing  services.  Fair
value of derivatives is based on quoted prices for  exchange-traded  instruments
or the cost to terminate or offset with other contracts.

In general,  other  investments are comprised of mortgage  loans,  policy loans,
real estate joint ventures and limited partnerships. The fair value for mortgage
loans and policy loans is estimated using  discounted cash flow analyses,  using
interest  rates  currently  being  offered for similar  loans to borrowers  with
similar  credit  ratings.  It was not  practicable to estimate the fair value of
joint  ventures and limited  partnerships  because of the  inability to estimate
fair value without incurring excessive costs. In addition,  the determination of
the fair  value of  investment  commitments  was deemed  impractical  due to the
inability to estimate future cash flows.

Fair value for  liabilities  for  investment-type  contracts is estimated  using
discounted  cash flow  calculations  based on  interest  rates  currently  being
offered for similar  contracts with  maturities  consistent with those remaining
for the  contracts  being  valued.  The fair value for notes payable is based on
quoted  market  prices for the publicly  traded  portion and on estimates  using
discounted cash flow analyses based on current borrowing rates for similar types
of borrowing arrangements for the non-publicly traded portion.


FUTURE POLICY BENEFITS, UNEARNED PREMIUMS, AND POLICY AND CONTRACT CLAIMS 
Future policy benefit  liabilities on non-universal life and accident and health
products have been provided on the net level premium method. The liabilities are
calculated based on assumptions as to investment yield, mortality, morbidity and
withdrawal  rates that were  determined  at the date of issue,  and  provide for
possible adverse deviations.  Interest  assumptions are graded and range from 7%
to 4.5% at December 31, 1998.  Withdrawal  assumptions are based  principally on
insurance subsidiaries' experience and vary by plan, year of issue and duration.
Policyholder liabilities on universal life and investment products are generally
based on policy account values.

Unearned  premiums  generally are calculated  using the pro rata method based on
gross premiums. However, in the case of extended warranty products, the unearned
premiums  are  calculated  such that the  premiums are earned over the period of
risk in a reasonable relationship to anticipated claims.

Policy and contract claim liabilities  represent  estimates for reported claims,
as well as provisions  for losses  incurred,  but not yet reported.  These claim
liabilities are based on historical experience and are estimates of the ultimate
amount  to be paid  when  the  claims  are  settled.  Changes  in the  estimated
liability are reflected in income as the estimates are revised.


FOREIGN CURRENCY TRANSLATION
In general,  foreign  revenues and expenses are  translated at average  exchange
rates. Foreign assets and liabilities are translated at year-end exchange rates.
Net foreign  exchange gains and losses on translation are generally  reported in
stockholders' equity, in accumulated other comprehensive income, net of deferred
income tax.


OTHER ACCOUNTING AND DISCLOSURE CHANGES
In 1998,  Aon adopted FASB  Statement No. 132  "Disclosures  About  Pensions and
Other  Postretirement  Benefit  Plans."  For  comparative  purposes,  prior year
financial statement disclosures have been restated.

In June 1998,  the FASB issued  Statement No. 133,  "Accounting  for  Derivative
Instruments and Hedging Activities." This statement is required to be adopted in
2000 with early adoption  permitted.  Aon has not yet decided when it will adopt
the new  statement.  Statement  No. 133  establishes  accounting  and  reporting
standards for derivative instruments and for hedging activities and will require
Aon to recognize all derivatives on the statement of financial  position at fair
value.  Aon has not yet  determined the effect this statement will have on Aon's
financial statements.


RECLASSIFICATION
Certain  amounts in prior  years  consolidated  financial  statements  have been
reclassified to conform to the 1998 presentation.


2. BUSINESS COMBINATIONS

PURCHASE METHOD
In 1998, Aon acquired Le Blanc de Nicolay (Le Blanc), Gil y Carvajal and certain
other operations for approximately $400 million in transactions accounted for on
a preliminary  basis by the purchase method.  The acquisitions  were financed by
internal funds and short-term  borrowings.  Intangible  assets of  approximately
$400  million  resulted  from  the  1998  acquisitions.  As  a  result  of  1998
acquisitions  and  the   finalization  of  purchase   accounting  for  the  1997
acquisition of Jauch & Hubener, Aon had established approximately $70 million of
purchase   accounting   liabilities   primarily   relating  to   severance   and
consolidation  of  real  estate.   In  connection  with  these  items,  Aon  had
approximately $50 million remaining unpaid in the general expenses  liability at
December 31, 1998.

In 1997,  Aon  acquired  A&A, the Minet Group  (Minet),  and Jauch & Hubener for
approximately $1.6 billion in transactions accounted for by the purchase method.
The 1997  

                                     - 39 -
<PAGE>
acquisitions were financed  primarily by the issuance of capital securities (see
note 8), issuance of commercial paper and internal funds.  Intangible  assets of
approximately  $1.5  billion  were  created by the 1997  acquisitions.  The 1997
consolidated statement of income included the operations of A&A since January 1,
1997.  If the A&A  acquisition  had been  consummated  on January  1, 1996,  the
unaudited pro forma  consolidated  results of operations  would have resulted in
total  revenues of $5.2  billion,  income  from  continuing  operations  of $258
million and net income of $291 million.

In October 1996,  Aon acquired Bain Hogg for  approximately  $260 million.  This
acquisition was financed by internal funds. The 1996  consolidated  statement of
income includes the operations of Bain Hogg since the date of acquisition. Aon's
1996  revenues  would  have been  approximately  $260  million  greater  had the
acquisition occurred on January 1, 1996.

As a result of the  acquisition of A&A, Aon had established  approximately  $200
million  of  purchase  accounting   liabilities   primarily  relating  to  costs
associated with the  consolidation of real estate and severance  liabilities for
approximately  2,000  positions.  In  addition,  as a result  of the  Bain  Hogg
acquisition,  approximately $85 million of purchase accounting  liabilities were
established   primarily   relating  to  both  the  costs   associated  with  the
consolidation of real estate and severance liabilities. In connection with these
items, Aon made payments and wrote off assets of $130 million and $80 million in
1997 and 1998,  respectively.  Approximately  $75 million remained unpaid in the
general  expenses  liability at December 31,  1998,  primarily  relating to real
estate.

In accordance  with a 1992 purchase  agreement,  securities  with a value of $48
million are being held in escrow. The escrowed  securities will be released on a
pre-determined schedule through 2007.


POOLING OF INTERESTS METHOD
In 1998, 1997 and 1996, Aon issued 1,543,000 shares,  274,000 shares and 819,000
shares of common stock,  respectively,  for mergers with insurance brokerage and
consulting  organizations.  In connection  with several of the mergers,  273,000
shares issued to sellers are being held in escrow at December 31, 1998,  pending
the resolution of  contingencies.  Aon's prior period financial  statements have
not been  restated for the mergers  because the effect of the above  mergers was
not material.

3. DISCONTINUED OPERATIONS
In April 1996, Aon completed the sales of its domestic  direct response life and
health subsidiary, Union Fidelity Life Insurance Company (UFLIC) and its capital
accumulation life insurance  subsidiary,  The Life Insurance Company of Virginia
(LOV) to General  Electric  Capital  Corporation  and received  after-tax  sales
proceeds  of  approximately  $1.2  billion.  The  gain on  sale of  discontinued
operations was $21 million, net of taxes.

For 1996, the discontinued operations had revenues of $293 million. The revenues
and  corresponding  expenses  were  reported on a net basis in the  consolidated
statements of income,  and were net of taxes of $12 million in 1996. Income from
discontinued operations that was earned subsequent to the commitment to the plan
to dispose was $22  million,  net of taxes,  in 1996.  Included in  discontinued
operations is pretax  interest  expense of $5 million in 1996. The allocation of
interest  expense  was based on the ratio of  discontinued  net  assets to total
consolidated equity and debt.


A&A DISCONTINUED OPERATIONS
A&A  discontinued its insurance  underwriting  operations in 1985, some of which
were then placed into run-off,  with the  remainder  sold in 1987. In connection
with  those  sales,  A&A  provided  indemnities  to the  purchaser  for  various
estimated and potential liabilities.

As  of  December  31,  1998,  the  liabilities  associated  with  the  foregoing
indemnities  and  liabilities of insurance  underwriting  subsidiaries  that are
currently  in run-off were  included in other  liabilities  in the  accompanying
statement of financial  position and amounted to $149 million.  Such liabilities
are net of reinsurance recoverables and other assets of $182 million.

The  insurance  liabilities  represent  estimates  of known  and  future  claims
expected to be made under  occurrence-based  insurance  policies and reinsurance
business.  Those  claims are expected to develop and be settled over the next 20
to 30 years.

The  insurance  liabilities  cannot be estimated  using  conventional  actuarial
reserving  techniques  because  of,  among  other  matters,  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,  independent  actuaries have combined  available  exposure
information with other relevant  industry data and have used various  projection
techniques  to estimate the insurance  liabilities,  which  liabilities  consist
principally of incurred but not reported losses.

Although these insurance  liabilities  represent a best estimate of the probable
liabilities, adverse developments may occur due to the nature of the information
available  and the  variables  inherent in the  estimation  processes.  Based on
current  estimates,  management  believes that the  established  liabilities  of
discontinued operations are sufficient.

                                     - 40 -
<PAGE>
4. INVESTMENTS
The components of investment income are as follows:

(millions)             Years ended December 31     1998        1997        1996
===============================================================================
Short-term investments                            $ 196       $ 178       $ 105
Fixed maturities
  Interest income                                   219         210         197
  Income on disposals                                37          27          13
  Losses on disposals                               (24)        (14)         (9)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   Fixed maturities                                 232         223         201
Equity securities
  Dividend income                                    80          95          61
  Income on disposals                                65          52          19
  Losses on disposals                               (27)        (32)         (7)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   Equity securities                                118         115          73
Other
  Interest and dividend income                       59          23          31
  Income (losses) on disposals                        1         (27)         (8)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
   Other                                             60          (4)         23
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Gross investment income                             606         512         402
Less investment expenses                             16          12          10
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Investment income                                 $ 590       $ 500       $ 392
===============================================================================


The components of net unrealized gains are as follows:

(millions)             Years ended December 31     1998        1997        1996
===============================================================================
Fixed maturities                                  $ 108       $ 130       $ 112
Equity securities                                    12         167         128
Deferred tax charge                                 (42)       (108)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net unrealized investment gains                   $  78       $ 189       $ 153
===============================================================================


The pretax changes in net unrealized investment gains (losses) are as follows:

(millions)             Years ended December 31     1998        1997        1996
===============================================================================
Fixed maturities--available for sale              $ (22)      $  18       $  (3)
Equity securities                                  (155)         39          50
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total                                             $(177)      $  57       $  47
===============================================================================


The amortized cost and fair value of investments in fixed  maturities and equity
securities are as follows:
<TABLE>
<CAPTION>

                                                 Gross         Gross
(millions)                     Amortized    Unrealized    Unrealized           Fair
As of December 31, 1998             Cost         Gains        Losses          Value
===================================================================================
<S>                          <C>           <C>           <C>            <C>        
U.S. government
  and agencies               $        96   $         6   $        (1)   $       101
States and political
  subdivisions                       485            32            --            517
Foreign governments                  740            65            (4)           801
Corporate securities               1,596            54           (46)         1,604
Mortgage-backed securities            25             1            --             26
Other fixed maturities                53             1            --             54
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Total fixed maturities             2,995           159           (51)         3,103
Total equity securities              756            49           (37)           768
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Total                        $     3,751   $       208   $       (88)   $     3,871
===================================================================================
</TABLE>




<PAGE>


<TABLE>
<CAPTION>

                                                 Gross         Gross
(millions)                     Amortized    Unrealized    Unrealized           Fair
As of December 31, 1997             Cost         Gains        Losses          Value
===================================================================================
<S>                          <C>           <C>           <C>            <C>        
U.S. government
  and agencies               $       209   $         4   $        --    $       213
States and political
  subdivisions                       524            31            --            555
Foreign governments                  842            51            (1)           892
Corporate securities               1,342            53           (10)         1,385
Mortgage-backed securities            42             2            --             44
Other fixed maturities                55             1            (1)            55
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Total fixed maturities             3,014           142           (12)         3,144
Total equity securities              639           175            (8)           806
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Total                        $     3,653   $       317   $       (20)   $     3,950
===================================================================================
</TABLE>


The amortized cost and fair value of fixed maturities,  by contractual  maturity
as of December 31, 1998 are shown below.  Expected  maturities  will differ from
contractual  maturities  because  borrowers may have the right to call or prepay
obligations with or without call or prepayment penalties.

                                           Amortized          Fair
(millions)                                      Cost         Value
==================================================================
Due in one year or less                  $       151   $       153
Due after one year through five years            821           856
Due after five years through ten years           957         1,009
Due after ten years                            1,041         1,059
Mortgage-backed securities                        25            26
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------
Total                                    $     2,995   $     3,103
==================================================================


Securities on deposit for regulatory  authorities as required by law amounted to
$274 million at December  31, 1998 and $309  million at December  31,  1997.  As
required  by the by-laws of Lloyd's  brokers,  cash and  short-term  investments
subject to floating charges for the benefit of insurance  creditors  amounted to
$1.3 billion and $1.1 billion at December 31, 1998 and 1997,  respectively.  Aon
maintains  premium trust bank accounts for premiums  collected from insureds but
not yet  remitted to  insurance  companies  of $1.3  billion and $1.4 billion at
December 31, 1998 and 1997, respectively.

At December 31, 1998 and 1997, respectively, Aon had $56 million and $96 million
of non-income producing investments.


5. DEBT AND LEASE COMMITMENTS

NOTES PAYABLE
The following is a summary of notes payable:

(millions)          As of December 31             1998          1997
====================================================================
6.3% debt securities, due January 2004        $    100      $    100
6.7% debt securities, due June 2003                150           150
6.875% debt securities, due October 1999           100           100
7.4% debt securities, due October 2002             100           100
Debt guarantee of employee stock
  ownership plan (ESOP)                             17            33
Notes payable, due in varying installments,
  with interest at 5% to 8%                        113           154
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------
Total notes payable                           $    580      $    637
====================================================================

                                     - 41 -
<PAGE>
Interest is payable semiannually on all debt securities.  In addition,  the debt
securities  are not  redeemable  by Aon prior to maturity and contain no sinking
fund  provisions.  Maturities of notes payable  excluding the debt  guarantee of
ESOP are $110 million, $3 million, $3 million,  $101 million and $150 million in
1999, 2000, 2001, 2002 and 2003, respectively.

In 1998, Aon entered into a committed  bank credit  facility under which certain
European  subsidiaries  can  borrow up to EUR 400  million  ($470  million).  At
December 31, 1998,  Aon had borrowed EUR 348 million ($408  million)  under this
facility.  Aon has $1.1 billion of other unused committed bank credit facilities
at December 31, 1998 to support its commercial  paper borrowings which were $436
million at December 31, 1998.

Information  related to notes payable (excluding the debt guarantee of ESOP) and
short-term borrowings is as follows:

Years ended December 31                            1998        1997        1996
===============================================================================
Interest paid (millions)                          $  87       $  70       $  45
Weighted average interest rates--
  short-term borrowings                             5.5%        5.6%        5.3%
===============================================================================



DEBT GUARANTEE OF ESOP
Aon's ESOP has entered into loan  agreements to purchase Aon common  stock.  The
loans are unconditionally  guaranteed by Aon and therefore the unpaid balance of
the loans is  classified  as notes  payable in the  accompanying  statements  of
financial position. An equivalent amount, representing deferred compensation, is
recorded as a deduction from  stockholders'  equity.  The ESOP paid $18 million,
$16  million  and $15  million  in 1998,  1997 and 1996,  respectively,  in loan
principal  and interest  from  contributions  made by Aon to the ESOP as well as
dividend  proceeds of common stock held by the ESOP.  The loans have an interest
rate of 8.35% and mature in 1999. The ESOP allocated 709,000 shares in 1998. The
remaining  unallocated  shares  at  December  31,  1998  will  be  released  for
allocation in 1999.

The following table details the shares held by the ESOP:

(thousands)        As of December 31            1998          1997
==================================================================
Allocated                                      3,240         2,787
Committed to be released                         734           709
Unallocated                                       --           734
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------
Total                                          3,974         4,230
==================================================================

LEASE COMMITMENTS
Aon has noncancelable  operating leases for certain office space,  equipment and
automobiles. Future minimum rental payments required under operating leases that
have  initial or  remaining  noncancelable  lease terms in excess of one year at
December 31, 1998 are:

(millions)
===========================================
1999                                 $  231
2000                                    211
2001                                    172
2002                                    151
2003                                    123
Later years                             541
- - - - - - - - - - - - - - - - - -------------------------------------------
Total minimum payments required      $1,429
===========================================


Rental expenses for all operating  leases for the years ended December 31, 1998,
1997 and  1996,  amounted  to $202  million,  $177  million  and  $114  million,
respectively.


6. INCOME TAX
Aon and its  principal  domestic  subsidiaries  are  included in a  consolidated
life-nonlife  federal income tax return. Aon's foreign subsidiaries file various
income tax  returns in their  foreign  jurisdictions.  A  reconciliation  of the
income tax  provisions  based on the U.S.  statutory  corporate  tax rate to the
provisions reflected in the consolidated financial statements is as follows:

Years ended December 31                            1998        1997        1996
===============================================================================
Statutory tax rate                                 35.0%       35.0%       35.0%
Tax-exempt investment income                       (1.8)       (3.1)       (3.7)
Amortization of intangible assets
  relating to acquired businesses                   1.9         3.3         0.4
State income taxes                                  1.6         2.8         3.5
Other--net                                          0.8        (0.5)       (0.7)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Effective tax rate                                 37.5%       37.5%       34.5%
===============================================================================


The provision for income tax is made up of the following components:

(millions)       Years ended December 31           1998        1997        1996
===============================================================================
Current:
  Federal                                         $ 184       $  21       $ 115
  Foreign                                            53          35          55
  State                                              23          18          25
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total current                                     $ 260       $  74       $ 195
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Deferred (credit):
  Federal                                         $   2       $ 100       $  (9)
  Foreign                                            87          24         (31)
  State                                              --           5          (1)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total deferred                                       89         129         (41)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Provision for income tax                          $ 349       $ 203       $ 154
===============================================================================


                                     - 42 -
<PAGE>
During 1998 and 1997,  Aon's  consolidated  statement  of income  reflects a tax
benefit of $25 million and $24 million, respectively, on the capital securities.

Significant  components  of Aon's  deferred  tax assets and  liabilities  are as
follows:

(millions)               As of December 31                   1998          1997
===============================================================================
Deferred tax assets:
  Policy liability amounts                            $       132   $       129
  Net operating loss and tax credit carry                      82            86
  Certain purchase accounting & restructuring liabilities      93           100
  Other--net                                                   79            83
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total deferred tax assets                                     386           398
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Deferred tax liabilities:
  Policy acquisition costs                                    (41)          (54)
  Unrealized investment gains                                 (42)         (108)
  Other--net                                                  (38)          (43)
Total deferred tax liabilities                               (121)         (205)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Valuation allowance                                           (51)          (56)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net deferred tax assets (liabilities)                  $      214   $       137
===============================================================================


As of December  31, 1998, a U.S.  subsidiary  of Aon (A&A) had U.S.  federal net
operating loss  carryforwards  of $76 million which expire in years 2008 through
2012, and federal foreign tax credit  carryforwards  of $13 million which expire
in years 1999 through 2000.

Internal  Revenue Code imposes  limitations  on the  utilization  of federal net
operating  loss  and  tax  credit  carryforwards  after  a  change  of  control,
consequently,  there will be annual  limitations on the realization of these tax
assets.  Accordingly,  in  connection  with the  purchase  of A&A, a $56 million
valuation  allowance was  established.  The valuation  allowance  changed to $51
million in 1998 corresponding to reductions in related deferred tax assets, with
no effect on income.  Subsequently recognized tax benefits for these items would
reduce  goodwill.  Although  future earnings cannot be predicted with certainty,
management  currently  believes that  realization  of the net deferred tax asset
after consideration of the valuation allowance is more likely than not.

Prior to 1984, the life insurance  companies were required to accumulate certain
untaxed amounts in a memorandum  "policyholders' surplus account." Under the Tax
Reform Act of 1984, the "policyholders'  surplus account" balances were "capped"
at  December  31,  1983  and the  balances  will  be  taxed  only to the  extent
distributed to stockholders or when they exceed certain prescribed limits. As of
December 31, 1998, the combined  "policyholders'  surplus account" of Aon's life
insurance   subsidiaries   approximates  $363  million.   Aon's  life  insurance
subsidiaries  do not  intend to make any  taxable  distributions  or exceed  the
prescribed limits in the foreseeable future;  therefore, no income tax provision
has been made. However, if such taxes were assessed, the amount of taxes payable
would be $127 million.

The amount of income taxes paid in 1998,  1997 and 1996 was $249  million,  $137
million and $387 million, respectively.


7. REINSURANCE AND CLAIM RESERVES
Aon's insurance  subsidiaries are involved in both the cession and assumption of
reinsurance  with other  companies.  Aon's  reinsurance  consists  primarily  of
short-duration   contracts  that  are  entered  into  with  numerous  automobile
dealerships  and insurers.  Aon's  insurance  subsidiaries  remain liable to the
extent that the reinsuring companies are unable to meet their obligations.

A summary of reinsurance activity is as follows:

(millions)     Years ended December 31      1998   1997   1996
==============================================================
Ceded premiums earned                       $580   $609   $508
Ceded premiums written                       528    713    667
Assumed premiums earned                      149    298    292
Assumed premiums written                     133    284    276
Ceded benefits to policyholders              325    286    220
==============================================================


Activity in the liability for policy contract claims is summarized as follows:

(millions)        Years ended December 31             1998     1997    1996
===========================================================================
Liabilities at beginning of year                     $ 520    $ 535   $ 715
Incurred losses:
  Continuing operations--current year                  807      814     774
  Continuing operations--prior years                   (19)     (50)    (36)
  Discontinued operations*                              --       --      90
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Total                                                  788      764     828
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Payment of claims:
  Current year                                        (539)    (538)   (552)
  Prior years                                         (286)    (241)   (283)
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Total                                                 (825)    (779)   (835)
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Liability for business sold                             --       --    (173)
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Liabilities at end of year
  (net of reinsurance recoverables:
  1998-$296, 1997-$289, 1996-$306)                   $ 483    $ 520   $ 535
===========================================================================
*Excludes A&A discontinued operations.


8. REDEEMABLE  PREFERRED  STOCK,  CAPITAL  SECURITIES AND  STOCKHOLDERS'  EQUITY

REDEEMABLE PREFERRED STOCK
At  December  31,  1998,  1,000,000  shares of  redeemable  preferred  stock are
outstanding.  Dividends are cumulative at an annual rate of $2.55 per share. The
shares of redeemable  preferred stock will be redeemable at the option of Aon or
the holders,  in whole or in part, at $50.00 per share  beginning one year after
the occurrence of certain future events.


CAPITAL SECURITIES
In January 1997,  Aon created Aon Capital A, a wholly-owned  statutory  business
trust,  for the  purpose of issuing  mandatorily  redeemable  preferred  capital
securities  (Capital  Securities).  The sole  asset of Aon  Capital A is an $824
million  aggregate   principal  amount  of  Aon's  8.205%  Junior


                                     - 43 -
<PAGE>
Subordinated  Deferrable  Interest  Debentures  due January 1, 2027. The back-up
guarantees, in the aggregate,  provide a full and unconditional guarantee of the
Trust's obligations under the Capital Securities.

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 the A&A acquisition.  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.  Interest is payable
semi-annually on the Capital Securities.  The Capital Securities are categorized
in the  consolidated  statements  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 in the
consolidated statements of income.


8% CUMULATIVE PERPETUAL PREFERRED STOCK
At December 31, 1996,  5,446,000  shares of 8%  cumulative  perpetual  preferred
stock were  outstanding.  Dividends were  cumulative at the annual rate of $2.00
per share.  In November  1997,  Aon  purchased  and retired all of the remaining
outstanding shares at a total cost of $136 million.


6.25% CUMULATIVE CONVERTIBLE EXCHANGEABLE PREFERRED STOCK 
In  November  1996,  each  outstanding  share  of 6.25%  cumulative  convertible
exchangeable  preferred  stock was  converted by the holders into 1.83 shares of
common stock for a total of 3,909,000  common shares.  Dividends were cumulative
at the annual rate of $3.125 per share.


COMMON STOCK
Aon repurchased  695,000,  202,000 and 1,931,000  shares in 1998, 1997 and 1996,
respectively,  of its  common  stock,  primarily  to  provide  shares  for stock
compensation plans and the conversion of preferred stock.


DIVIDENDS
A summary of dividends incurred is as follows:

(millions)           Years ended December 31       1998        1997        1996
===============================================================================
Redeemable preferred stock                        $   2       $   2       $   2
8% cumulative perpetual
  preferred stock                                    --           9          11
6.25% cumulative convertible
  exchangeable preferred stock                       --          --           5
Common stock                                        192         169         154
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Total dividends incurred                          $ 194       $ 180       $ 172
===============================================================================



STATUTORY CAPITAL AND SURPLUS
Generally, the capital and surplus of Aon's insurance subsidiaries available for
transfer to the parent  company are  limited to the amounts  that the  insurance
subsidiaries'  statutory  capital and surplus exceed minimum  statutory  capital
requirements;  however,  payments of the amounts as dividends  may be subject to
approval  by  regulatory  authorities.  See note 6 for  possible  tax effects of
distributions made out of untaxed earnings.

Net statutory income of the insurance subsidiaries (including the statutory gain
on the sale of LOV and UFLIC in 1996), is summarized as follows:

(millions)     Years ended December 31       1998    1997    1996
=================================================================
Life insurance                               $239    $265    $807
Property casualty                              62      66      71
=================================================================


Statutory  capital and surplus of the  insurance  subsidiaries  is summarized as
follows:

(millions)     As of December 31             1998    1997    1996
=================================================================
Life insurance                               $610    $724    $612
Property casualty                             446     438     364
=================================================================



9. EMPLOYEE BENEFITS

SAVINGS AND PROFIT SHARING PLANS
Certain  of Aon's  subsidiaries  maintain  contributory  savings  plans  for the
benefit of United States salaried and commissioned  employees and a contributory
profit  sharing  plan  for  the  benefit  of  Canadian  salaried  employees  and
commissioned  agents.  Provisions  made for these  plans were $22  million,  $22
million and $14 million in 1998, 1997 and 1996, respectively.

EMPLOYEE STOCK OWNERSHIP PLAN
Certain of Aon's  subsidiaries  maintain a leveraged ESOP for the benefit of the
United States salaried and certain commissioned employees.  Contributions to the
ESOP  amounted to $16  million,  $14  million and $12 million in 1998,  1997 and
1996, respectively.


PENSION AND OTHER POSTRETIREMENT BENEFITS
Aon sponsors defined benefit pension and postretirement health and welfare plans
which   provide   retirement,   medical  and  life   insurance   benefits.   The
postretirement  health care plans are contributory,  with retiree  contributions
adjusted annually; the life insurance and pension plans are noncontributory.


                                     - 44 -
<PAGE>
U.S. PENSION AND OTHER BENEFIT PLANS
The following tables provide a reconciliation  of the changes in obligations and
fair  value of assets  for the years  ending  December  31,  1998 and 1997 and a
statement of the funded status as of December 31, 1998 and 1997.
<TABLE>
<CAPTION>

                                     Pension Benefits             Other Benefits
(millions)                          1998          1997          1998           1997
===================================================================================
<S>                          <C>           <C>           <C>            <C>        
RECONCILIATION OF BENEFIT OBLIGATION
Obligation at January 1         $    692       $   305       $    61        $    40
Service cost                          32            32             1              2
Interest cost                         51            46             5              4
Participant contributions             --            --             4              4
Plan amendments                       (8)           --            --             --
Actuarial (gain) loss                (13)           12             7              3
Acquisitions                          11           310            --             17
Benefit payments                     (38)          (36)           (8)            (9)
Change in interest rate               29            23            --             --
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Obligation at December 31       $    756       $   692       $    70        $    61
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------

RECONCILIATION OF FAIR VALUE OF PLAN ASSETS
Fair value at January 1         $    853       $   317       $     7        $    --
Actual return on plan assets          60           159             1              1
Acquisitions                          16           393            --              6
Employer contributions                13            20            --             --
Benefit payments                     (38)          (36)           --             --
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Fair value at December 31       $    904       $   853       $     8        $     7
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------

FUNDED STATUS
Funded status at December 31    $    148       $   161       $   (62)       $   (54)
Unrecognized prior-service            (6)           (1)          (10)           (16)
Unrecognized gain                    (99)         (123)          (16)           (23)
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------
Prepaid (accrued) benefit
  cost                          $     43       $    37       $   (88)       $   (93)
===================================================================================
</TABLE>


Pension plan assets  include common stock issued by Aon with a fair value of $91
million  (1,639,000  shares) and $50 million  (1,083,000 shares) at December 31,
1998 and 1997,  respectively,  on which dividends of $1.1 million and $1 million
were received.

The  following  table  provides  the  components  of net  periodic  benefit cost
(credit) for the plans for the years ended December 31, 1998, 1997 and 1996:

(millions)     Pension Benefits                    1998        1997        1996
===============================================================================
Service cost                                      $  32       $  32       $  21
Interest cost                                        51          46          21
Expected return on plan assets                      (71)        (62)        (22)
Amortization of prior-service                        (1)         --          --
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net periodic benefit cost                         $  11       $  16       $  20
===============================================================================


(millions)     Other Benefits                      1998        1997        1996
===============================================================================
Service cost                                      $   1       $   2       $   1
Interest cost                                         5           4           3
Expected return on plan assets                       (1)         (1)         --
Amortization of prior-service                        (5)         (5)         (5)
Amortization of net gain                             (1)         (1)         (2)
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
Net periodic benefit credit                       $  (1)      $  (1)      $  (3)
===============================================================================


In April 1996, Aon established a limited time early retirement incentive program
that provided  benefits through the defined benefit pension plan. The additional
cost of termination  benefits applicable for 1996 resulting from the program was
$19 million.

The  weighted-average  assumptions as of  December 31 used in the measurement of
the U.S. benefit obligations are shown in the following table:

                                   Pension Benefits      Other Benefits
                                    1998       1997      1998      1997
=======================================================================
Discount rate                        7.2%       7.5%      7.2%      7.5%
Expected return on plan assets       9.0        9.0        --        --
Rate of compensation increase        5.0        5.0       5.0       5.0
=======================================================================

The employer's liability for future plan cost increase is limited in any year to
5% per annum. For measurement  purposes in 1998, 1997 and 1996, a 7.5%, 8.5% and
9.5%,  respectively,  annual  rate of increase in the per capita cost of covered
health  care  benefits  (trend  rate)  adjusted  for  actual  current  year cost
experience  was assumed,  decreasing  gradually to 6% in year 2003 and remaining
the same thereafter.  However, with the employer funding increase cap limited to
5% per year, net employer trend rates are effectively  limited to 5% per year in
the future.

Due to the employer  funding cap, a 1% change in assumed  healthcare  cost trend
rates has no effect on the service and interest cost  components of net periodic
postretirement  healthcare  benefit cost and on the  accumulated  postretirement
benefit obligation as of December 31, 1998.


INTERNATIONAL PENSION PLANS
The following tables provide a reconciliation  of the changes in obligations and
fair  value of assets  for the years  ending  December  31,  1998 and 1997 and a
statement  of the funded  status as of December  31, 1998 and 1997 for  material
international   plans,   which  are  located  in  the  United  Kingdom  and  The
Netherlands.


                                     - 45 -
<PAGE>
                                             International Pension
(millions)                                      1998          1997
==================================================================

RECONCILIATION OF BENEFIT OBLIGATION
Obligation at January 1                  $     1,623   $       753
Service cost                                      61            49
Interest cost                                    113            96
Participants contributions                         7             7
Acquisitions                                      --           640
Benefit payments                                 (73)          (47)
Change in interest rate                          375           202
Foreign exchange translation                      41           (77)
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------
Obligation at December 31                $     2,147   $     1,623
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------

RECONCILIATION OF FAIR VALUE OF PLAN ASSETS
Fair value at January 1                  $     1,752   $       845
Actual return on plan assets                     215           211
Acquisitions                                      --           790
Employer contributions                            33            33
Participants contributions                         7             7
Benefit payments                                 (73)          (47)
Foreign exchange translation                      42           (87)
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------
Fair value at December 31                $     1,976   $     1,752
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------

FUNDED STATUS
Funded status at December 31             $      (171)  $       129
Unrecognized prior-service                         1             1
Unrecognized loss                                430            89
Additional minimum pension liability            (155)           --
- - - - - - - - - - - - - - - - - ------------------------------------------------------------------
Prepaid benefit cost                     $       105   $       219
==================================================================


As of December  31, 1998,  plans with a projected  benefit  obligation  (PBO) in
excess  of the fair  value of plan  assets  had a PBO of $1.9  billion  and plan
assets with a fair value of $1.7 billion,  and plans with an accumulated benefit
obligation  (ABO) in excess of the fair  value of plan  assets  had an ABO of $1
billion and plan assets with a fair value of $908 million. Also, at December 31,
1998, the prepaid  benefit cost presented in the foregoing table is comprised of
plans with  prepaid  assets of $205  million  and  accrued  liabilities  of $100
million.

The following table provides the components of net periodic benefit cost for the
international  plans for  the years ended  December 31, 1998, 1997 and 1996:

(millions)                        1998       1997      1996
===========================================================
Service cost                     $  61      $  49      $ 15
Interest cost                      113         96        26
Expected return on plan assets    (172)      (141)      (33)
Amortization of net loss             2         --        --
- - - - - - - - - - - - - - - - - -----------------------------------------------------------
Net periodic benefit cost        $   4      $   4      $  8
===========================================================


The  weighted-average  assumptions as of December 31 used in the  measurement of
the international pension benefit  obligations are shown in the following table:

                                   1998        1997        1996
==================================================================
Discount rate                   6.0 - 7.0%        7.0%   7.0 - 8.0%
Expected return on plan assets  7.0 -10.0   7.0 -10.0    7.0 -10.0
Rate of compensation increase   4.0 - 4.5   4.0 - 5.5    4.0 - 5.5
==================================================================


10. STOCK COMPENSATION PLANS

STOCK AWARD PLAN
In 1997,  Aon's  stockholders  approved an amendment to the Aon Stock Award Plan
that  increased  the  aggregate  number of shares of common stock that Aon could
award up to 12,900,000  shares.  At December 31, 1998,  approximately  4,000,000
shares remain available for award. Generally,  the award plan requires employees
to complete three continuous years of service before the award begins to vest in
increments  until the completion of a ten-year period of continuous  employment.
In general,  most awarded shares are issued as they become vested.  With certain
limited exceptions,  any break in continuous employment will cause forfeiture of
all  unvested  awards.  The  compensation  cost  associated  with each  award is
deferred  and  amortized  over the  period of  continuous  employment  using the
straight-line method.

Aon common stock awards outstanding consist of the following:

(shares in thousands)
Years ended December 31                      1998        1997          1996
===========================================================================
Shares outstanding at beginning of year     6,414       5,210         3,914
Granted                                       786       1,869         1,793
Vested and exercised                         (803)       (570)         (398)
Canceled                                     (183)        (95)          (99)
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------
Shares outstanding at end of year           6,214       6,414         5,210
===========================================================================

STOCK OPTION PLAN
Under a nonqualified  stock option plan,  options to purchase  common stock were
granted to certain officers and employees of Aon and its subsidiaries at 100% of
market  value on the date of grant.  In 1997,  Aon's  stockholders  approved  an
amendment to the Aon Stock Option Plan that  increased the  aggregate  number of
common  shares  that Aon could issue up to  23,300,000  shares.  Generally,  the
option plan requires  employees to complete  three  continuous  years of service
before  the  options  begin to vest in  increments  until  the  completion  of a
seven-year period of continuous employment.


                                     - 46 -
<PAGE>
A summary of Aon's stock option activity and related information consists of the
following:

<TABLE>
<CAPTION>
Years ended December 31              1998                   1997                   1996
=======================================================================================
                                 Weighted               Weighted               Weighted
                                  Average                Average                Average
                                 Exercise               Exercise               Exercise
(shares in thousands)  Shares       Price     Shares       Price     Shares       Price
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------------------
<S>                     <C>      <C>           <C>      <C>           <C>      <C>     
Beginning
  outstanding           6,052    $     31      5,276    $     26      5,212    $     21
Granted                 1,587          65      1,646          48      1,535          35
Exercised                (658)         22       (579)         20       (732)         17
Canceled                 (116)         33       (291)         29       (739)         23
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------------------
Ending
  outstanding           6,865    $     39      6,052    $     31      5,276    $     26
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------------------
Exercisable at end
  of year                 841    $     23        696    $     21        465    $     19
- - - - - - - - - - - - - - - - - ---------------------------------------------------------------------------------------
Options available
  for grant             4,530                  6,001                  1,295
=======================================================================================
</TABLE>


A summary of options outstanding and options exercisable is as follows:

As of December 31, 1998
(shares in thousands)
===============================================================================
                        Options Outstanding                 Options Exercisable
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
                                   Weighted
                                    Average  Weighted                  Weighted
Range of                          Remaining   Average                   Average
Exercise            Shares      Contractual  Exercise         Shares   Exercise
Prices         Outstanding     Life (years)     Price    Exercisable      Price
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
$19.06-$22.29          381              1.9    $20.87            210     $20.19
 22.64- 22.64          861              2.2     22.64            297      22.64
 22.83- 23.83          890              3.1     23.78            198      23.71
 23.89- 32.58          282              1.8     24.78            136      24.84
 34.33- 34.33        1,232              4.2     34.33             --         --
 35.33- 43.38        1,482              7.9     42.94             --         --
 52.59- 71.81        1,737              9.1     62.98             --         --
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
$19.06-$71.81        6,865              5.6    $39.47            841     $22.63
===============================================================================


As of December 31, 1997
(shares in thousands)
===============================================================================
                        Options Outstanding                 Options Exercisable
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
                                   Weighted
                                    Average  Weighted                  Weighted
Range of                          Remaining   Average                   Average
Exercise            Shares      Contractual  Exercise         Shares   Exercise
Prices         Outstanding     Life (years)     Price    Exercisable      Price
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
$17.33-$22.29          651              2.2    $20.00            296     $18.92
 22.64- 22.64        1,070              3.2     22.64            251      22.64
 22.83- 22.83        1,052              3.2     23.41             23      23.07
 23.89- 32.58          382              2.7     24.57            126      24.47
 34.33- 54.97        2,897              8.0     44.95             --         --
- - - - - - - - - - - - - - - - - -------------------------------------------------------------------------------
$17.33-$54.97        6,052              5.2    $31.10            696     $21.41
===============================================================================



PRO FORMA INFORMATION
Pro forma information  regarding net income and net income per share is required
by FASB  Statement No. 123, and has been  determined as if Aon had accounted for
employee stock options and stock awards under the fair value method.

The pro forma net income and net income per share information is as follows:

Years ended December 31             1998      1997      1996
============================================================
NET INCOME (MILLIONS):
  As reported                    $   541   $   299   $   335
  Pro forma                          530       292       330

NET INCOME PER SHARE:
  Dilutive
   As reported                      3.11      1.68      1.90
   Pro forma                        3.05      1.64      1.87
  Basic
   As reported                      3.16      1.71      1.93
   Pro forma                        3.10      1.67      1.90
============================================================

The fair value per share of options and awards  granted is  estimated  as $16.51
and  $56.08  in 1998,  $8.97 and  $41.59  in 1997 and $8.19 and  $30.87 in 1996,
respectively,  on the grant date using the  Black-Scholes  option  pricing model
with the following weighted average assumptions:

     Dividend  yield                  2% 
     Expected  volatility            20%
     Risk-free  interest rate         6%
     Expected term life (in years):
        Stock options              1.35
        Stock awards                  0

The  compensation  cost as  generated  by the  Black-Scholes  model,  may not be
indicative  of the future  benefit,  if any,  that may be received by the option
holder.

The pro  forma  information  reflected  above may not be  representative  of the
amounts to be expected in future  years as the fair value  method of  accounting
contained  in FASB  Statement  No. 123 has not been  applied to options  granted
prior to January 1995.


EMPLOYEE STOCK PURCHASE PLAN
Effective  July 1, 1998,  Aon adopted an employee  stock  purchase  plan,  which
provides for the purchase of a maximum of 5,000,000 shares of Aon's common stock
by eligible U.S. employees.  Under the plan, shares of Aon's common stock may be
purchased at six-month intervals at 85% of the lower of the fair market value of
the  common  stock  on the  first  or the  last  day of each  six-month  period.
Approximately  222,000  shares  were first  purchased  under the plan in January
1999.


11. FINANCIAL INSTRUMENTS

FINANCIAL RISK MANAGEMENT
Aon is exposed to market risk from changes in foreign  currency  exchange rates,
interest rates and securities  prices. To manage the volatility related to these
exposures,  Aon enters into various derivative transactions that have the effect
of reducing these risks by creating offsetting market exposures.  If Aon did not
use derivative contracts, its exposure and market risk would be higher.

                                     - 47 -
<PAGE>
Derivative transactions are governed by a uniform set of policies and procedures
covering  areas  such  as  authorization,   counterparty  exposure  and  hedging
practices.  Positions are monitored  using  techniques  such as market value and
sensitivity analyses.

In  addition  to  creating  market  risks that  offset the  underlying  business
exposures,  certain  derivatives  also give rise to credit risks due to possible
non-performance by  counterparties.  The credit risk is generally limited to the
fair value of those  contracts  that are  favorable  to Aon. Aon has limited its
credit risk by  restricting  investments  in  derivative  contracts to a diverse
group of highly rated major financial  institutions and by using exchange-traded
instruments.  Aon closely monitors the  credit-worthiness of and exposure to its
counterparties and considers its credit risk to be minimal. At December 31, 1998
and 1997,  Aon  placed  securities  in escrow  amounting  to $8  million  and $6
million, respectively, relating to these derivative contracts.


FOREIGN EXCHANGE RISK MANAGEMENT
Aon manages a group of foreign  exchange and interest rate risks that  considers
the correlation among thirteen currency rates and two short-term interest rates.
Aon uses foreign currency listed futures and options on futures, as well as over
the  counter  options,  and forward  contracts  to manage the effects of foreign
currency  fluctuations on the  translation of the financial  statements of Aon's
foreign operations.  Generally,  related gains and losses on these contracts are
reflected as an adjustment to income when settled.  For contracts  designated as
hedges of a net investment in foreign subsidiary,  realized and unrealized gains
are recorded  directly to stockholders'  equity as a component of net unrealized
foreign exchange gains and losses.

Certain  of  Aon's  foreign  brokerage  subsidiaries,  primarily  in the  United
Kingdom,  receive  revenues in currencies that differ from the currency in which
their  operating  expenses are  denominated.  To reduce the  variability of cash
flows from these operations,  foreign exchange forward contracts and options are
used having  settlement  dates that are  primarily  less than one year.  Related
gains or losses on these contracts are reflected as an adjustment to income when
the currencies are exchanged to settle expense  commitments.  Forward  contracts
entered into  require no up-front  premium and settle at the  expiration  of the
related contract.


INTEREST RATE RISK MANAGEMENT
Aon uses  interest  rate  derivative  contracts to manage the interest rate risk
associated with assets and liabilities underlying its insurance underwriting and
insurance brokerage  businesses.  Interest rate derivatives are also utilized to
manage the company's funding and other corporate risks.

Interest  rate swap  agreements  are being  used to manage  asset and  liability
durations.  Exchange-traded  Eurodollar futures,  used in conjunction with basis
rate swaps,  are used to manage  asset  liability  durations  related to various
other  crediting   arrangements  emanating  from  other  insurance  underwriting
businesses.  As of December 31, 1998 and 1997, these swap agreements had the net
effect of shortening asset  durations.  Variable rates received on interest rate
and  basis  rate  swap  agreements   correlate  with  crediting  rates  paid  on
outstanding liabilities. The net effect of swap payments is settled periodically
and reported in income. There is no settlement of underlying notional amounts.

Aon also  enters  into  interest  rate  swap and cap  agreements  and  purchases
exchange-traded  Eurodollar  and  Eurosterling  futures to limit its exposure to
decreasing short-term interest rates,  primarily relating to brokerage fiduciary
funds. Aon also enters into interest rate swap agreements, sells exchange-traded
interest  rate futures and  purchases  interest  rate caps to limit its interest
rate  exposure  to  financing  short-term  receivables.  The net  effect of swap
payments is settled  periodically and reported in income. There is no settlement
of underlying  notional  amounts.  Exchange-traded  Eurodollar and  Eurosterling
futures are valued and settled daily,  with amounts  reported in income when the
contract expires. The commission paid for these futures contracts represents the
cost basis of the position,  until it expires or is closed. The premium that Aon
pays for interest rate caps  represents  the cost basis of the position until it
expires or is closed.


SECURITY PRICE RISK MANAGEMENT
Exchange-traded  treasury and equity futures and options are used primarily as a
hedge against the value of Aon's  available  for sale fixed  maturity and equity
investments. Aon also uses exchange traded equity futures and options to protect
the value of its pension equity  investments.  Aon sells futures,  purchases put
options, and writes call options. Exchange-traded futures and options are valued
and settled daily. The premium that Aon pays for purchased  options and receives
for written options  represents the cost basis of the option until it expires or
is closed.

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

Realized gains and losses on derivatives that qualify as hedges are deferred and
reported as an adjustment of the cost basis of the hedged item.  Deferred  gains
and losses are amortized

                                     - 48 -
<PAGE>
into income over the remaining life of the hedged item. Outstanding  derivatives
that are hedges of items  carried at fair value are  reflected in the  financial
statements at fair value with changes in the  derivative  fair value reported as
unrealized gains and losses directly in stockholders' equity.

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  group of
invested  assets must have a reliably  measurable fair value and changes in fair
value must have the potential to affect future earnings.

Aon performs frequent  analyses to measure the degree of correlation  associated
with its  derivative  programs.  Aon assesses  the  adequacy of the  correlation
analyses  results in  determining  whether  the  derivatives  qualify  for hedge
accounting.  Changes in the fair value of the  derivative  must be  expected  to
substantially  offset  changes  in the fair value of the  designated  risk being
hedged.  If the criteria for hedge accounting are not met, the resulting gain or
loss from the hedge would be realized through the statement of operations in the
current period.


NOTIONAL AND OTHER DATA
The following are the notional amounts of Aon's outstanding  derivatives grouped
by the types of risks being managed reflecting various periods of exposure:

(millions)          As of December 31                    1998      1997
=======================================================================
Foreign currency management
  Forwards                                              $ 195     $ 208
  Futures                                                  69       102
  Call options                                             35        --
Interest rate and asset/liability duration management
  Eurodollar futures                                    1,730       639
  Eurosterling futures                                    900     1,092
  Treasury futures                                         15        --
  Call options                                             30         4
  Put options                                              10        60
  Interest rate caps                                       --       120
  Interest rate swaps--pay fixed                        1,192        93
  Interest rate swaps--receive fixed                      172       502
  Basis rate swaps--pay and receive variable              184       140
=======================================================================


Aon amortized $1 million in 1998 and $3 million in 1997 and 1996,  respectively,
of net deferred gains relating to derivatives into income.

The  interest  rates on Aon's  outstanding  swaps at December  31 are  presented
below:

                Receive           Pay          Pay           Receive
                  Fixed      Variable        Fixed          Variable
====================================================================
1998            4.0-8.1%      3.2-8.8%     4.8-9.7%          4.3-5.7%
1997            4.0-8.4%          5.8%     6.0-9.7%          5.6-6.5%
====================================================================


As of December  31,  1998,  swaps have  maturities  ranging from January 1999 to
August 2018. Aon receives variable rates based on the one-month commercial paper
and the three- and six-month U.S. London Interbank Offer Rate (LIBOR).  Aon pays
variable rates based on the three- and six-month U.S. LIBOR rates, the six-month
Dutch Guilder LIBOR rate, and the three-month  Australian Bank Bill rate.  Basis
rate  swaps have  maturities  ranging  from  December  2000 to January  2007 and
require payments based on the three-month LIBOR index, and the one-year constant
maturity  treasury  rate (CMT) and provide for  receipts  based on the  two-year
treasury  rate,  the daily Federal  Funds Rate and the one-year CMT rate.  Other
outstanding contracts generally have terms that are less than one year.


OTHER FINANCIAL INSTRUMENTS
Aon has certain investment commitments to provide capital  and  fixed-rate loans
as well as  certain  forward  contract  purchase  commitments.   The  investment
commitments,  which  would  be  collateralized  by  related  properties  of  the
underlying  investments,  involve  varying  elements  of credit and market risk.
Investment commitments outstanding at December 31, 1998 and 1997 totaled $283
million and $173 million, respectively.

Subsidiaries of Aon have entered into  agreements  with financial  institutions,
whereby the  subsidiaries  sold  certain  receivables,  with  limited  recourse.
Agreements  provide  for sales of  receivables  on a  continuing  basis  through
December  2002.  As of  December  31,  1998 and  1997,  the  maximum  commitment
contained in these  agreements was $2.8 billion and $2.0 billion,  respectively.
Aon's maximum  credit risk under  recourse  provisions of these  agreements  was
approximately  $202  million and $93  million,  at  December  31, 1998 and 1997,
respectively.

An Aon subsidiary issues fixed rate Guaranteed  Investment  Contracts (GICS) and
floating rate funding  agreements and invests the proceeds primarily in the U.S.
fixed income  markets.  The assets  backing the GICS and funding  agreements are
subject to varying elements of credit and market risk.


                                     - 49 -
<PAGE>
FAIR VALUE OF FINANCIAL INSTRUMENTS
Accounting standards require the disclosure of fair values for certain financial
instruments.  The fair value  disclosures  are not  intended  to  encompass  the
majority of policy liabilities, various other non-financial instruments or other
intangible  assets  related  to Aon's  business.  Accordingly,  care  should  be
exercised in deriving  conclusions  about Aon's business or financial  condition
based on the fair  value  disclosures.  The  carrying  value  and fair  value of
certain of Aon's financial instruments are as follows:

As of December 31                         1998                     1997
================================================================================
                                 Carrying       Fair       Carrying         Fair
(millions)                          Value      Value          Value        Value
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------
Assets:
  Fixed maturities and
   equity securities               $3,871      $3,871       $3,950        $3,950
  Other investments                   349         348          263           262
  Cash, receivables and
   short-term
   investments                      9,550       9,550        9,033         9,033
  Derivatives*                         --          (2)          --             8
Liabilities:
  Investment type
   insurance contracts              1,261       1,310          828           831
  Short-term borrowings,
   premium payables
   and general expenses             9,051       9,051        8,633         8,633
  Notes payable                       580         589          637           643
  Capital securities                  800         916          800           900
================================================================================
*Derivatives  with a carrying  value of $(2) million and $21 million and a  fair
value of $(2) million and $21 million are included in other asset  categories at
December 31, 1998 and 1997, respectively.


12. CONTINGENCIES
Aon and its  subsidiaries  are subject to numerous  claims,  tax assessments and
lawsuits that arise in the ordinary course of business.  The damages that may be
claimed are  substantial,  including  in many  instances  claims for punitive or
extraordinary damages. Accruals for these items have been provided to the extent
that losses are deemed probable and are estimable.

Certain U.K.  subsidiaries  of Aon are required by their  regulatory  body,  the
Personal  Investment  Authority,  to review  transactions  with,  and advice to,
clients in relation to the sale of certain  investments and insurance  products.
The  disclosure  and advice in  connection  with such sales has been called into
question by clients or by the Personal Investment  Authority on their behalf. In
certain cases,  these reviews can result in a requirement to pay compensation to
clients.  Subsidiaries  of Aon are in the process of  determining  the extent of
liabilities and recoverability of related indemnities from third parties.

In the fourth  quarter of 1998, Aon received an Internal  Revenue  Service (IRS)
revenue  agent`s  report (RAR)  proposing  adjustments to the tax of certain Aon
subsidiaries for the period 1990 through 1993. In the RAR, the IRS has contended
that retro-rated extended warranty contracts do not constitute insurance for tax
purposes.  Accordingly,  the IRS has  proposed  a  deferral  of  deductions  for
obligations  under  those  contracts.  The effect of such  deferral  would be to
increase  the  current  tax   obligations   of  certain  Aon   subsidiaries   by
approximately  $74  million,  $3  million,  $5  million  and $12  million  (plus
interest) in years 1990,  1991, 1992 and 1993,  respectively.  Aon believes that
the IRS's  position in the RAR is without merit and  inconsistent  with numerous
previous IRS private letter rulings. Aon has commenced an administrative  appeal
and intends to contest  vigorously  such  treatment.  Aon  believes  that if the
contracts  are  deemed  not to be  insurance  for tax  purposes,  they  would be
recharacterized in such a way that the increased taxes for the years in question
would be far less than the  proposed  assessments.  In the same RAR, a number of
additional  items were identified which would also increase the tax of other Aon
subsidiaries  for 1990 through 1993.  Aon believes that these  additional  items
should be resolved through factual substantiation of certain accounting matters.
Aon  further  believes  that  the  settlement  of these  issues  will not have a
material impact on its financial position.

Although  the  ultimate  outcome  of these  issues  cannot  be  ascertained  and
liabilities in indeterminate  amounts may be imposed on Aon 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 will not have a material
adverse effect on the consolidated financial position of Aon.


                                     - 50 -
<PAGE>
REPORTS BY INDEPENDENT AUDITORS AND MANAGEMENT


REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

BOARD OF DIRECTORS AND STOCKHOLDERS
AON CORPORATION

We have audited the accompanying  consolidated  statements of financial position
of  Aon  Corporation  as  of  December  31,  1998  and  1997,  and  the  related
consolidated statements of income, stockholders' equity, and cash flows for each
of the three  years in the period  ended  December  31,  1998.  These  financial
statements   are  the   responsibility   of  the   Company's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects, the consolidated financial position of Aon Corporation at
December 31, 1998 and 1997, and the  consolidated  results of its operations and
its cash flows for each of the three  years in the  period  ended  December  31,
1998, in conformity with generally accepted accounting principles.


                                                     /s/ ERNST & YOUNG LLP

Chicago, Illinois
February 9, 1999



REPORT BY MANAGEMENT

The  management  of  Aon  Corporation  is  responsible  for  the  integrity  and
objectivity of the financial  statements and other financial  information in the
annual report.  The statements  have been prepared in conformity  with generally
accepted accounting principles.  These statements include informed estimates and
judgments  for those  transactions  not yet  complete or for which the  ultimate
effects cannot be measured precisely.  Financial  information  elsewhere in this
report is consistent  with that in the financial  statements.  The  consolidated
financial statements have been audited by our independent  auditors.  Their role
is to render an independent professional opinion on Aon's financial statements.

Management  maintains  a  system  of  internal  control  designed  to  meet  its
responsibilities  for reliable financial  statements.  The system is designed to
provide reasonable assurance,  at appropriate costs, that assets are safeguarded
and that  transactions  are properly  recorded and executed in  accordance  with
management's  authorization.  Judgments  are  required to assess and balance the
relative  costs and  expected  benefits of those  controls.  It is  management's
opinion  that its  system of  internal  control as of  December  31,  1998,  was
effective in providing  reasonable  assurance that its financial statements were
free of material misstatement.  In addition, management supports and maintains a
professional  staff of internal  auditors who coordinate audit coverage with the
independent   auditors  and  conduct  an  extensive  program  of  financial  and
operational audits.

The Board of Directors  selects an Audit  Committee  from among its members.  No
member of the Audit  Committee  is an employee of Aon.  The Audit  Committee  is
responsible to the Board for reviewing the  accounting  and auditing  procedures
and  financial  practices  of  Aon  and  for  recommending  appointment  of  the
independent  auditors.  The Audit Committee meets  periodically with management,
internal  auditors  and  independent  auditors  to  review  the work of each and
satisfy   itself   that   those   parties   are   properly   discharging   their
responsibilities.  Both the independent  auditors and the internal auditors have
free access to the Audit  Committee,  without the  presence  of  management,  to
discuss the adequacy of internal  control and to review the quality of financial
reporting.


                                     - 51 -
<PAGE>
<TABLE>
<CAPTION>

SELECTED FINANCIAL DATA

(millions except common stock and per share data)           1998            1997            1996            1995            1994
================================================================================================================================
<S>                                                <C>             <C>             <C>             <C>          
<C<C>INCOME STATEMENT DATA                                                                                          
   Brokerage commissions and fees                  $       4,197   $       3,605   $       1,919   $       1,651   $       1,389
   Premiums and other                                      1,706           1,646           1,577           1,473           1,376
   Investment income                                         590             500             392             342             276
                                                   -----------------------------------------------------------------------------
      Total revenue                                        6,493           5,751           3,888           3,466           3,041
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------

   Income from continuing operations
      excluding special charges                    $         541   $         406   $         351   $         304   $         269
   Income from continuing operations                         541             299             292             304             269
   Discontinued operations                                    --              --              43              99              91
   Net income                                                541             299             335             403             360
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------

DILUTIVE PER SHARE DATA
   Income from continuing operations
      excluding special charges                    $        3.11   $        2.32   $        2.00   $        1.71   $        1.51
   Income from continuing operations                        3.11            1.68            1.64            1.71            1.51
   Discontinued operations                                    --              --            0.26            0.59            0.57
   Net income                                               3.11            1.68            1.90            2.30            2.08
BASIC PER SHARE DATA
   Income from continuing operations                        3.16            1.71            1.67            1.72            1.53
   Net income                                               3.16            1.71            1.93            2.33            2.12
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------

BALANCE SHEET DATA
ASSETS
   Investments                                     $       6,452   $       5,922   $       5,213   $      10,639   $       9,783
   Brokerage receivables                                   5,423           5,320           3,566           2,264           1,882
   Intangible assets                                       3,500           3,094           1,598           1,598           1,548
   Other                                                   4,313           4,355           3,346           5,235           4,709
                                                   -----------------------------------------------------------------------------
      Total assets                                 $      19,688   $      18,691   $      13,723   $      19,736   $      17,922
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------

LIABILITIES AND STOCKHOLDERS' EQUITY
   Insurance premiums payable                      $       6,948   $       6,380   $       4,144   $       2,723   $       2,409
   Policy liabilities                                      4,823           4,450           4,360           9,556           9,310
   Notes payable                                             580             637             521             554             561
   General liabilities                                     3,470           3,552           1,815           4,179           3,335
                                                   -----------------------------------------------------------------------------
      Total liabilities                                   15,821          15,019          10,840          17,012          15,615
   Redeemable preferred stock                                 50              50              50              50              50
   Capital securities                                        800             800              --              --              --
   Stockholders' equity                                    3,017           2,822           2,833           2,674           2,257
                                                   -----------------------------------------------------------------------------
      Total liabilities and stockholders' equity   $      19,688   $      18,691   $      13,723   $      19,736   $      17,922
- - - - - - - - - - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------

COMMON STOCK DATA
   Dividends paid per share                        $        1.10   $        1.02   $        0.95   $        0.89   $        0.84
   Stockholders' equity per share                          17.74           16.80           16.21           15.18           12.20
   Price range                                    75 9/16-48 1/4  58 7/8-40 3/16   43 1/8-31 5/8   33 7/8-20 7/8   23 7/8-19 1/2
   Market price at year-end                               55.375          58.625          41.375          33.250          21.375
   Common stockholders                                    12,294          12,698          13,030          13,520          14,163
   Shares outstanding (in millions)                        170.0           168.0           166.4           162.4           161.5
================================================================================================================================
</TABLE>

                                     - 52 -
<PAGE>

<TABLE>
<CAPTION>
QUARTERLY FINANCIAL DATA

(millions except common stock and per share data)               1Q               2Q              3Q              4Q            1998
===================================================================================================================================
<S>                                                  <C>              <C>             <C>             <C>             <C>          
INCOME STATEMENT DATA
   Brokerage commissions and fees                    $         996    $       1,060   $       1,023   $       1,118   $       4,197
   Premiums and other                                          417              423             431             435           1,706
   Investment income                                           148              140             153             149             590
                                                     ------------------------------------------------------------------------------
      Total revenue                                          1,561            1,623           1,607           1,702           6,493
                                                     ------------------------------------------------------------------------------
   Net income                                                  138              140             124             139             541
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------

DILUTIVE NET INCOME PER SHARE                        $        0.80    $        0.81   $        0.71   $        0.79   $        3.11
BASIC NET INCOME PER SHARE                                    0.82             0.82            0.72            0.81            3.16
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------
COMMON STOCK DATA
   Dividends paid per share                          $        0.26    $        0.28   $        0.28   $        0.28   $        1.10
   Stockholders' equity per share                            17.10            17.91           17.62           17.74           17.74
   Price range                                           67-54 1/8    72 1/4-61 1/2  75 9/16-58 7/8   64 1/8-48 1/4  75 9/16-48 1/4
   Shares outstanding (in millions)                          168.7            168.9           170.1           170.0           170.0
   Average monthly trading volume (in millions)                4.4              5.1             5.7             8.0             5.8
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>


(millions except common stock and per share data)               1Q               2Q              3Q              4Q            1997
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                  <C>              <C>             <C>             <C>             <C>          
INCOME STATEMENT DATA
   Brokerage commissions and fees                    $         842    $         885   $         923   $         955   $       3,605
   Premiums and other                                          394              422             406             424           1,646
   Investment income                                           118              118             122             142             500
                                                     ------------------------------------------------------------------------------
      Total revenue                                          1,354            1,425           1,451           1,521           5,751
                                                     ------------------------------------------------------------------------------
   Net income excluding special charges                         91              101             101             113             406
   Net income                                                    1               84             101             113             299
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------

DILUTIVE PER SHARE DATA
   Net income excluding special charges              $        0.52    $        0.58   $        0.57   $        0.65   $        2.32
   Net income (loss)                                         (0.02)            0.48            0.57            0.65            1.68
BASIC NET INCOME (LOSS) PER SHARE                            (0.02)            0.48            0.58            0.66            1.71
- - - - - - - - - - - - - - - - - -----------------------------------------------------------------------------------------------------------------------------------

COMMON STOCK DATA
   Dividends paid per share                          $        0.24    $        0.26   $        0.26   $        0.26   $        1.02
   Stockholders' equity per share                            15.34            16.04           16.60           16.80           16.80
   Price range                                       44 7/8-40 5/8   53 3/8-40 3/16  56 1/8-50 1/16   58 7/8-50 1/4  58 7/8-40 3/16
   Shares outstanding (in millions)                          166.9            167.2           167.7           168.0           168.0
   Average monthly trading volume (in millions)                3.3              3.7             3.9             4.1             3.8
===================================================================================================================================
</TABLE>
                                     - 53 -
<PAGE>
INFORMATION CONCERNING FORWARD-LOOKING STATEMENTS

This annual report contains forward-looking  statements relating to such matters
as future financial performance,  the business of Aon and Year 2000. The Private
Securities   Litigation   Reform  Act  of  1995   provides  a  safe  harbor  for
forward-looking  statements.  These  forward-looking  statements  are subject to
certain  risks and  uncertainties  that  could  cause  actual  results to differ
materially from historical results or those anticipated,  depending on a variety
of factors  such as changes  in  worldwide  and  national  economic  conditions,
fluctuations  in foreign  currencies,  changes in  securities  and fixed  income
markets,  unpredictability  of timing and  amounts of returns on private  equity
holdings,  downward commercial property and casualty premium pressures,  and the
competitive environment.  In addition, Aon notes that a variety of factors could
cause Aon's actual results and experience  relating to compliance with Year 2000
to  differ  materially  from  the  anticipated  results  or  other  expectations
expressed in Aon's forward-looking statements concerning Year 2000 issues. These
factors include (i) the  unanticipated  material impact of a system fault of Aon
relating to Year 2000, (ii) the failure to successfully  remediate,  in spite of
testing,  material  systems of Aon,  (iii) the time it may take to  successfully
remediate a failure once it occurs,  as well as the resulting  costs and loss of
revenues,  and (iv) the failure of third parties to properly  remediate material
Year 2000 problems.

                              - Inside Back Cover -       
<PAGE>

                                                                      Exhibit 21
<TABLE>
<CAPTION>
Aon CORPORATION AND ITS SUBSIDIARIES (AS OF DECEMBER 31, 1998)                                                      

<S>                                                                        <C>
Aon Corporation                                                            Delaware
120524 Canada Inc.                                                         Canada
1e Katharinastrase 29 Vermogensverwaltungsges mbH                          Germany
2e Katharinastrase 29 Vermogensverwaltungsges mbH                          Germany
A Morel & Cie Sa                                                           France
A&A (UK) Limited                                                           United Kingdom
A. J. Norcott & Company (Holdings) Limited                                 United Kingdom
A. J. Norcott & Partners (Northern) Limited                                United Kingdom
A. J. Norcott & Partners (Scotland) Limited                                United Kingdom
A. J. Norcott & Partners Limited                                           United Kingdom
A. J. Norcott Benefit Consultants Limited                                  United Kingdom
A.H. Laseur B.V.                                                           Netherlands
A.H.E. Alexander Howden de Espana S.A.                                     Spain
A.H.G. Far East Ltd.                                                       Hong Kong
A.H.O.H. (Bermuda) Limited                                                 Bermuda
A/S Assurance                                                              Norway
AA & JG Denison & Company Ltd.                                             United Kingdom
AARE Corporation                                                           New York
ABS Insurance Agency Ltd.                                                  United Kingdom
Acedale Co. Ltd.                                                           Hong Kong
ACGLRA Corp.                                                               Texas
ACGMGA Corp.                                                               Texas
ACN 006 278 226                                                            Australia
ACN 008 497 318                                                            Australia
ACN 051 158 984                                                            Australia
ACP Insurance Agency, Inc.                                                 Texas
Adam & Adam Limited                                                        New Zealand
Adams & Porter Financial Services, Inc.                                    Texas
Adams & Porter Services, Inc.                                              Texas
Advantage Plus Insurance Services, Inc.                                    Illinois
Adviser 151 Limited                                                        United Kingdom
Affinity Insurance Services of Washington, Inc.                            Washington
Affinity Insurance Services, Inc.                                          Pennsylvania
Agencia Interoceanica de Subscripcion y Administracion S.A.                Mexico
Agostini Insurance Brokers Ltd.                                            Trinidad
AGR Disposition Company Inc.                                               California
Agricola Training Limited                                                  United Kingdom
Agricola Underwriting Limited                                              United Kingdom
Agricola Underwriting Management Limited                                   New Zealand
Agricola Underwriting Management Pty Ltd.                                  Australia
Agricultural Risk Management Argentina S.A.                                Argentina
Agricultural Risk Management Chile                                         Chile
Agricultural Risk Management North America, Inc.                           Kansas
Agricultural Risk Management Pacific Limited                               New Zealand
Agricultural Risk Management Pty. Ltd.                                     Australia
Agricultural Risk Management, Limited                                      United Kingdom
Agte Gebruder GmbH                                                         Germany
Aidec Ciskei (Pty) Ltd.                                                    South Africa
Aidec Gazankulu (Pty) Limited                                              South Africa
Aidec Kangwane (Pty) Limited                                               South Africa

                                     - 1 -
<PAGE>
Aidec Kwandebele (Pty) Limited                                             South Africa
Aidec Lebowa (Pty) Limited                                                 South Africa
Aidec M.I.B. North West (Pty) Limited                                      South Africa
Aidec Venda (Pty) Limited                                                  South Africa
Aircrew Underwriting Agencies Ltd.                                         United Kingdom
Airscope Insurance Services Limited                                        United Kingdom
AIS Affinity Insurance Agency of New England, Inc.                         Massachusetts
AIS Affinity Insurance Agency, Inc.                                        California
AIV Beteiligungsgesellschaft mbh                                           Germany
Aldebaran S.R.L. Rome                                                      Italy
Alexander & Alexander (Asia) Holdings Pte. Ltd.                            Singapore
Alexander & Alexander (C.I.) Limited                                       Guernsey
Alexander & Alexander (Hong Kong) Holdings Limited                         Hong Kong
Alexander & Alexander (Ireland) Limited                                    Ireland
Alexander & Alexander (Isle of Man) Limited                                United Kingdom
Alexander & Alexander (Malaysia) Sdn. Bhd.                                 Malaysia
Alexander & Alexander (PNG) Pty. Ltd.                                      Papua New Guinea
Alexander & Alexander (Taiwan) Ltd.                                        Taiwan
Alexander & Alexander (Thailand) Ltd.                                      Thailand
Alexander & Alexander (UK) Ltd.                                            United Kingdom
Alexander & Alexander Australia Holdings Ltd.                              Australia
Alexander & Alexander B.V.                                                 Netherlands
Alexander & Alexander Benefits Services Inc.                               Virginia
Alexander & Alexander Benefits Services of Louisiana                       Louisiana
Alexander & Alexander Colombia Ltda.                                       Colombia
Alexander & Alexander Consultants S.A.                                     France
Alexander & Alexander Corretores e Consultores de Seguros Lda.             Portugal
Alexander & Alexander Europe B.V.                                          Netherlands
Alexander & Alexander Europe GmbH                                          Austria
Alexander & Alexander Europe Ltd.                                          United Kingdom
Alexander & Alexander Far East Inc.                                        California
Alexander & Alexander Far East Partners                                    Hong Kong
Alexander & Alexander Finance Limited                                      United Kingdom
Alexander & Alexander France S.A.                                          France
Alexander & Alexander Galicia, S.A.                                        Spain
Alexander & Alexander Holdings (NZ) Ltd.                                   New Zealand
Alexander & Alexander Holdings B.V.                                        Netherlands
Alexander & Alexander Insurance Agency Ltd.                                Taiwan
Alexander & Alexander Insurance Benefits Services Inc.                     Massachusetts
Alexander & Alexander Insurance Brokers - Hungary                          Hungary
Alexander & Alexander Insurance Brokers Ltd. Poland                        Poland
Alexander & Alexander International Inc.                                   Maryland
Alexander & Alexander Italia S.P.A.                                        Italy
Alexander & Alexander Korea Inc.                                           Korea
Alexander & Alexander Limited                                              Australia
Alexander & Alexander Limited                                              United Kingdom
Alexander & Alexander Ltd.                                                 Fiji
Alexander & Alexander Ltd.                                                 New Zealand
Alexander & Alexander Ltd. (Thailand)                                      Thailand
Alexander & Alexander Mexico Agente de Seguros y de Fianza S.A. de         Mexico
Alexander & Alexander Middle East Limited                                  Bermuda

                                     - 2 -
<PAGE>
Alexander & Alexander of Colombia Ltda.                                    Colombia
Alexander & Alexander of Kansas, Inc.                                      Kansas
Alexander & Alexander of Long Island Inc.                                  Connecticut
Alexander & Alexander of Mississippi Inc.                                  Mississippi
Alexander & Alexander of Missouri Inc.                                     Missouri
Alexander & Alexander of Virginia, Inc.                                    Virginia
Alexander & Alexander of Washington Inc.                                   Washington
Alexander & Alexander Pte. Ltd.                                            Singapore
Alexander & Alexander Risk Management Services, Inc.                       Taiwan
Alexander & Alexander S.R.O. (Czech. Republic)                             Czech Republic
Alexander & Alexander Scandinavia AB                                       Sweden
Alexander & Alexander Services (India) Pvt. Ltd.                           India
Alexander & Alexander Services Canada Inc.                                 Canada
Alexander & Alexander Services UK Limited                                  Scotland
Alexander & Alexander Sigorta Musavirlk Anomim Sirketi                     Turkey
Alexander & Alexander Spain Correduria de Seguros, S.A.                    Spain
Alexander & Alexander Telemarketing                                        Brazil
Alexander & Alexander Trustee Jersey Ltd.                                  Jersey, Channel Islands
Alexander & Alexander U.K. Pension Trustees Ltd.                           United Kingdom
Alexander & Alexander, Inc.                                                Oklahoma
Alexander & Alexander, Inc.                                                West Virginia
Alexander & Davidson de Colombia LTDA.                                     Colombia
Alexander Administration Services Ltd.                                     Isle of Man
Alexander Clay and Partners Consulting                                     United Kingdom
Alexander Clay Communications Limited                                      United Kingdom
Alexander Consulting Investment Services Inc.                              Maryland
Alexander Coyle Hamilton Ltd.                                              Ireland
Alexander Financial Services Ltd.                                          Scotland
Alexander Hellas E.P.E.                                                    Greece
Alexander Howden (Hellas) Ltd.                                             Guernsey
Alexander Howden (Kazakhstan) Ltd.                                         Kazakhstan
Alexander Howden Asia Pacific Ltd.                                         United Kingdom
Alexander Howden Canada Limited                                            Canada
Alexander Howden de Espana                                                 Spain
Alexander Howden Del Peru S.A. Reinsurance Brokers                         Peru
Alexander Howden Energy & Partners Scandinavia                             Norway
Alexander Howden Far East Ptd. Ltd.                                        Singapore
Alexander Howden Financial Services Limited                                United Kingdom
Alexander Howden Group (Asia) Pte. Ltd.                                    Singapore
Alexander Howden Group (Australia) Limited                                 Australia
Alexander Howden Group (Bermuda) Ltd.                                      Bermuda
Alexander Howden Group Agency Management Ltd.                              United Kingdom
Alexander Howden Group Limited                                             Bermuda
Alexander Howden Holdings Limited                                          United Kingdom
Alexander Howden Insurance Services of Texas, Inc.                         Texas
Alexander Howden International Limited                                     United Kingdom
Alexander Howden Leasing Ltd.                                              United Kingdom
Alexander Howden Limited                                                   United Kingdom
Alexander Howden North America, Inc.                                       Georgia
Alexander Howden North America, Inc.                                       Massachusetts
Alexander Howden North America, Inc.                                       New York

                                     - 3 -
<PAGE>
Alexander Howden North America, Inc.                                       Ohio
Alexander Howden North America, Inc.                                       Texas
Alexander Howden Ossa De Colombia SA                                       Colombia
Alexander Howden Previsionales y Personas Ltda.                            Colombia
Alexander Howden Reinsurance Brokers (Australia) Ltd.                      Australia
Alexander Howden Reinsurance Brokers (NZ) Ltd.                             New Zealand
Alexander Howden Reinsurance Intermediaries, Inc.                          New York
Alexander Howden UK Limited                                                United Kingdom
Alexander Howden Underwriting Limited                                      United Kingdom
Alexander Howden Y Asociados S.A. de C.V.                                  Mexico
Alexander Insurance Managers (Barbados) Ltd.                               Barbados
Alexander Insurance Managers (Cayman) Ltd.                                 Cayman Islands
Alexander Insurance Managers (Dublin) Ltd.                                 Ireland
Alexander Insurance Managers (Guernsey) Ltd.                               Guernsey
Alexander Insurance Managers (Holdings) Ltd.                               Guernsey
Alexander Insurance Managers (Isle of Man) Ltd.                            Isle of Man
Alexander Insurance Managers (Jersey) Ltd.                                 Jersey, Channel Islands
Alexander Insurance Managers (Luxembourg) S.A.                             Luxembourg
Alexander Insurance Managers Ltd.                                          Bermuda
Alexander Insurance Managers N.V.                                          Netherlands
Alexander Lippo (Hong Kong) Ltd.                                           Hong Kong
Alexander of Texas Inc.                                                    Texas
Alexander Portfolio Management Ltd.                                        New Zealand
Alexander R.M.C. Brown Partners Ltd.                                       Australia
Alexander Reinsurance Intermediaries, Inc.                                 New York
Alexander Risk Management and Consulting Services, Inc.                    Texas
Alexander Services, Inc.                                                   Illinois
Alexander Stenhouse & Partners Limited                                     Scotland
Alexander Stenhouse Belgium International                                  Belgium
Alexander Stenhouse Limited                                                United Kingdom
Alexander Stenhouse Magee Limited                                          Ireland
Alexander Stenhouse Management Services Ltd.                               Scotland
Alexander Stenhouse Nominees Ltd.                                          Australia
Alexander Stenhouse Risk Management S.A.                                   Spain
Alexander Stenhouse UK Ltd.                                                United Kingdom
Alexander Underwriting Agencies Limited                                    Bermuda
Alexander Underwriting Services Inc.                                       Maryland
Alexander Underwriting Services Limited                                    United Kingdom
Alexander Watkins S.A. de C.V.                                             Mexico
Alexander y Alexander Chile Ltda.                                          Chile
Alexander, Ayling, Barrios & Cia, S.A.                                     Argentina
Allen Insurance Associates                                                 California
Alpenbeck Limited                                                          United Kingdom
American Associates, Inc.                                                  Texas
American Insurance Brokers, Ltd.                                           Indiana
American Special Risk Insurance Company                                    Delaware
Anchor Reinsurance Company, Ltd.                                           Bermuda
Anchor Underwriting Managers, Ltd.                                         Bermuda
Anderson and Anderson Insurance Brokers, Inc.                              California
Anderson and Anderson of Los Angeles Insurance Brokers, Inc.               California
Anderson and Anderson of Orange County Insurance Brokers, Inc.             California

                                     - 4 -
<PAGE>
Anderson and Anderson/Benefits Insurance Brokers, Inc.                     California
Anderson and Anderson/D-K&S Insurance Brokers, Inc.                        California
Andrea Scagliarni Assicurazione                                            Italy
Anglo-Swiss Reinsurance Brokers Ltd.                                       Switzerland
Anistics Ltd.                                                              United Kingdom
Anscor Insurance Brokers Inc.                                              Philippines
Aon  WACUS Kreditversicherungsmakler GmbH & Co.                            Germany
Aon  WACUS Verwaltungs GmbH                                                Germany
Aon (Deutschland) GmbH                                                     Germany
Aon (Panama) Ltd. S.A.                                                     Panama
Aon Acquisition Corporation of Arkansas                                    Arkansas
Aon Acquisition Corporation of New Jersey                                  New Jersey
Aon Administrative Services Corp.                                          California
Aon Advisors (U.K.) Limited                                                United Kingdom
Aon Advisors, Inc.                                                         Virginia
Aon Alexander & Alexander N.V.                                             Belgium
Aon Annuity Group, Inc.                                                    Texas
Aon Antillen nv                                                            Netherland Antilles
Aon Artscope Kunstversicherungsmakler  GmbH                                Germany
Aon Aruba nv                                                               Netherland Antilles
Aon Asia Insurance Services bv                                             Netherlands
Aon Automotive Group, Inc.                                                 Illinois
Aon Aviation, Inc.                                                         Illinois
Aon Belgium nv                                                             Belgium
Aon Benefit Services, Inc.                                                 Massachusetts
Aon Benefits Corretores de Seguros Ltda.                                   Brazil
Aon Benefits Insurance Brokers (Singapore) Pte. Ltd.                       Singapore
Aon Boels & Begault S.A.                                                   Belgium
Aon Brazil Corretores de Seguros Ltda.                                     Brazil
Aon Broker Services, Inc.                                                  Illinois
Aon Broking Services S.A.                                                  Argentina
Aon bv                                                                     Netherlands
Aon Canada Inc.                                                            Canada
Aon Capital A                                                              Delaware
Aon Capital Management, Inc.                                               Delaware
Aon Captive Management, Ltd.                                               U.S. Virgin Islands
Aon Captive Services (Nederland) bv                                        Netherlands
Aon Captive Services Antillen nv                                           Netherland Antilles
Aon Captive Services Aruba nv                                              Netherland Antilles
Aon Ceska republika spol. s.r.o.                                           Czech Republic
Aon Claro Santa Cruz y Compania S.A., Corredores de Seguros                Chile
Aon Colombia Limitada Corredores de Seguros                                Colombia
Aon Compensation and Benefits Limited                                      United Kingdom
Aon Construction Services International Limited                            United Kingdom
Aon Consulting & Insurance Services                                        California
Aon Consulting Acquisition Corporation of California                       California
Aon Consulting Agency, Inc.                                                Texas
Aon Consulting Belgium S.A.                                                Belgium
Aon Consulting Consultores de Seguros Ltda.                                Brazil
Aon Consulting Denmark A/S                                                 Denmark
Aon Consulting Financial Services Limited                                  United Kingdom

                                     - 5 -
<PAGE>
Aon Consulting GmbH                                                        Germany
Aon Consulting Hong Kong Ltd.                                              Hong Kong
Aon Consulting Inc.                                                        Canada
Aon Consulting Limited                                                     United Kingdom
Aon Consulting Nederland cv                                                Netherlands
Aon Consulting of Maryland, Inc.                                           Maryland
Aon Consulting Pty Limited                                                 Australia
Aon Consulting South Africa (Pty) Ltd.                                     South Africa
Aon Consulting Thailand Ltd.                                               Thailand
Aon Consulting Worldwide, Inc.                                             Maryland
Aon Consulting, Inc.                                                       New York
Aon Consulting, Inc.                                                       New Jersey
Aon Consulting, Inc.                                                       Ohio
Aon Consulting, Inc.                                                       Texas
Aon Consulting, Inc.                                                       Florida
Aon Consulting, Inc. of Arizona                                            Arizona
Aon Consulting, Limited                                                    Quebec
Aon Consulting, S.A. de C.V.                                               Mexico
Aon Credit Services Corporation                                            Delaware
Aon CSC Corredores de Reaseguros Limitada                                  Chile
Aon Denmark A/S                                                            Denmark
Aon Direct Group Inc.                                                      Canada
Aon Direct Group Small Company Life and Health Agents                      Illinois
Aon Direct Research & Analytics Group Inc.                                 Canada
Aon Eesti AS                                                               Estland
Aon Employee Benefits of Ohio, Inc.                                        Ohio
Aon Enterprise Insurance Services, Inc.                                    Illinois
Aon Enterprise Insurance Services, Inc.                                    Texas
Aon Entertainment Risk Services Limited                                    United Kingdom
Aon European Investments Limited                                           United Kingdom
Aon Financial Institutions Services, Inc.                                  Illinois
Aon Financial Products, Inc.                                               Delaware
Aon Financial Services Group of Colorado, Inc.                             Colorado
Aon Financial Services Group of New York, Inc.                             New York
Aon Financial Services Group, Inc.                                         California
Aon Financial Services Group, Inc.                                         Illinois
Aon Financial Services Group, Inc.                                         Pennsylvania
Aon Financial Services Group, Inc.                                         Texas
Aon Finland OY                                                             Finland
Aon France S.A.                                                            France
Aon Funds                                                                  Delaware
Aon General Agency, Inc.                                                   Texas
Aon General Consulting Ltda.                                               Brazil
Aon GGI Acquisition Corporation, Inc.                                      Texas
Aon Groep Nederland bv                                                     Netherlands
Aon Group Corretagem, Administracao e Consultoria de Seguros Ltda          UK
Aon Group Limited                                                          United Kingdom
Aon Group Limited de Argentina S.A.                                        Argentina
Aon Group Limited de Mexico, Intermediario de Reaseguro, S.A. de C.V.      Mexico
Aon Group Ltd. Peru S.A.                                                   Peru
Aon Group Venezuela, Corretaje de Reaseguro, C.A.                          Venezuela

                                     - 6 -
<PAGE>
Aon Group, Inc.                                                            Maryland
Aon Hamond & Regine, Inc.                                                  New York
Aon Hazard Limited                                                         United Kingdom
Aon Health Services Inc.                                                   Texas
Aon Healthcare Risk, Inc.                                                  Florida
Aon Holdings (Scandinavia) A/S                                             Denmark
Aon Holdings Antillen nv                                                   Netherland Antilles
Aon Holdings Asia bv                                                       Netherlands
Aon Holdings Asia Ltd.                                                     Hong Kong
Aon Holdings Australia Ltd.                                                Australia
Aon Holdings bv                                                            Netherlands
Aon Holdings Deutschland GmbH                                              Germany
Aon Holdings New Zealand Pty. Ltd.                                         New Zealand
Aon Home Warranty Services, Inc.                                           Delaware
Aon Hudig cv                                                               Netherlands
Aon Hudig Groningen bv                                                     Netherlands
Aon Hudig Hengelo bv                                                       Netherlands
Aon Hudig Nijmegen bv                                                      Netherlands
Aon Hudig Noordwijk bv                                                     Netherlands
Aon Hudig Tilburg bv                                                       Netherlands
Aon Hudig Venlo bv                                                         Netherlands
Aon Hudig-Schreinemacher V.O.F.                                            Netherlands
Aon Iberia, Correduria de Seguros, S.A.                                    Spain
Aon India Limited                                                          United Kingdom
Aon Innovative Solutions, Inc.                                             Missouri
Aon Insurance Management of Texas, Inc.                                    Texas
Aon Insurance Management Services - Virgin Islands, Inc.                   U.S. Virgin Islands
Aon Insurance Management Services, Inc.                                    Delaware
Aon Insurance Managers (Singapore) Pte. Ltd.                               Singapore
Aon Insurance Managers (USA) Inc.                                          Vermont
Aon Insurance Services                                                     California
Aon Insurance Services, Inc.                                               Pennsylvania
Aon Intermediaries (Bermuda) Ltd.                                          Bermuda
Aon International bv                                                       Netherlands
Aon Investment Consulting Inc.                                             Florida
Aon Investment Holdings, Inc.                                              Delaware
Aon Investor Strategies, Inc.                                              Delaware
Aon ISI, Inc.                                                              Colorado
Aon Italia SpA                                                             Italy
Aon Life Agency of Texas, Inc.                                             Texas
Aon Lumley Consulting (Pty) Ltd.                                           South Africa
Aon Lumley South Africa (Pty) Ltd.                                         South Africa
Aon Magyarorszag Alkusz Kft.                                               Hungary
Aon makelaars in assurantien bv                                            Netherlands
Aon Managed Care Risk & Insurance Services, Inc.                           California
Aon Management Hong Kong Ltd.                                              Hong Kong
Aon Management Institute, Inc.                                             Connecticut
Aon Manzitti S.p.A.                                                        Italy
Aon Medical Consultants, Inc.                                              Delaware
Aon Mibrag Versicherungsvermittlungs GmbH                                  Germany
Aon Natural Resources Ltd.                                                 Labuan

                                     - 7 -
<PAGE>
Aon Nominees Limited                                                       United Kingdom
Aon Norway A/S                                                             Norway
Aon Ossa Ltda, Corredores de Reaseguros                                    UK
Aon Overseas Holdings Limited                                              United Kingdom
Aon OWA Insurance Services GmbH & Co.                                      Germany
Aon OWA Verwaltungs GmbH                                                   Germany
Aon Partnership Limited                                                    United Kingdom
Aon Paulista Corretores de Seguros Ltda.                                   Brazil
Aon Pension Trustees Limited                                               United Kingdom
Aon Pilar Corretora E Servicos de Seguros S/C Ltda.                        Brazil
Aon Polska sp.z.o.o.                                                       Poland
Aon Portugal, Corretores de Seguros, S.A.                                  Portugal
Aon Previsonals y Personas Ltda, Corredores de Reaseguros y Consultor      UK
Aon Private Risk Management Insurance Agency, Inc.                         Illinois
Aon Properties Limited                                                     United Kingdom
Aon Pyramid International Limited                                          United Kingdom
Aon Re (Bermuda) Ltd.                                                      Bermuda
Aon Re (Thailand) Ltd.                                                     Thailand
Aon Re Accident & Health Limited                                           United Kingdom
Aon Re Asia Ltd.                                                           Singapore
Aon Re Aviation Limited                                                    United Kingdom
Aon Re Canada Inc.                                                         Canada
Aon Re China Ltd.                                                          Hong Kong
Aon Re Inc.                                                                Illinois
Aon Re International Limited                                               United Kingdom
Aon Re Latinoamericana, S.A.                                               Mexico
Aon Re Limited                                                             United Kingdom
Aon Re Netherlands cv                                                      Netherlands
Aon Re Non-Marine Limited                                                  United Kingdom
Aon Re North American Limited                                              United Kingdom
Aon Re Panama, S.A.                                                        Panama
Aon Re Special Risks Limited                                               United Kingdom
Aon Re UK Limited                                                          United Kingdom
Aon Re Worldwide Limited                                                   United Kingdom
Aon Re Worldwide, Inc.                                                     Delaware
Aon Real Estate Services, Inc.                                             New York
Aon Reed Stenhouse Inc.                                                    Canada
Aon Resource, Inc.                                                         Delaware
Aon Risconcept Inc.                                                        Canada
Aon Risk Consultants (Bermuda ) Ltd.                                       Bermuda
Aon Risk Consultants (Europe) Limited                                      United Kingdom
Aon Risk Consultants BV                                                    Netherlands
Aon Risk Consultants, Inc.                                                 Illinois
Aon Risk Management Services Italia srl.                                   Italy
Aon Risk Management Services Scandinavia A/S                               Denmark
Aon Risk Managers, Inc.                                                    Illinois
Aon Risk Resources Insurance Agency, Inc.                                  Illinois
Aon Risk Resources Limited                                                 United Kingdom
Aon Risk Resources, Inc.                                                   Delaware
Aon Risk Services (Antilles) nv                                            Netherland Antilles
Aon Risk Services (Barbados) Ltd.                                          Barbados

                                     - 8 -
<PAGE>
Aon Risk Services (Bermuda) Ltd.                                           Bermuda
Aon Risk Services (Cayman) Ltd.                                            Cayman Islands
Aon Risk Services (Europe) S.A.                                            Luxembourg
Aon Risk Services (Holdings) of Latin America, Inc.                        Delaware
Aon Risk Services (Holdings) of the Americas, Inc.                         Illinois
Aon Risk Services (Ireland) Limited                                        Ireland
Aon Risk Services Agente de Seguros y de Fianzas, S.A. de C.V.             Mexico
Aon Risk Services Argentina SA                                             Argentina
Aon Risk Services Australia Ltd.                                           Australia
Aon Risk Services Companies, Inc.                                          Maryland
Aon Risk Services Do Brazil Corretores de Seguros Ltda.                    Brazil
Aon Risk Services France S.A.                                              France
Aon Risk Services Holdings UK Limited                                      United Kingdom
Aon Risk Services Hong Kong Ltd.                                           Hong Kong
Aon Risk Services Inc. U.S.                                                Maryland
Aon Risk Services International (Holdings) Inc.                            Delaware
Aon Risk Services Japan Ltd.                                               Japan
Aon Risk Services Korea Ltd.                                               Korea
Aon Risk Services Limited                                                  United Kingdom
Aon Risk Services New Zealand Pty. Ltd.                                    New Zealand
Aon Risk Services of Texas, Inc.                                           Texas
Aon Risk Services Singapore (Insurance Brokers) Pte. Ltd.                  Singapore
Aon Risk Services Taiwan Ltd.                                              Taiwan
Aon Risk Services Thailand Ltd.                                            Thailand
Aon Risk Services UK Limited                                               United Kingdom
Aon Risk Services, Inc.                                                    Delaware
Aon Risk Services, Inc. (Pacific)                                          Hawaii
Aon Risk Services, Inc. of Alabama                                         Alabama
Aon Risk Services, Inc. of Arizona                                         Arizona
Aon Risk Services, Inc. of Arkansas                                        Arkansas
Aon Risk Services, Inc. of Central California Insurance Services           California
Aon Risk Services, Inc. of Colorado                                        Colorado
Aon Risk Services, Inc. of Connecticut                                     Connecticut
Aon Risk Services, Inc. of Florida                                         Florida
Aon Risk Services, Inc. of Hawaii                                          Hawaii
Aon Risk Services, Inc. of Idaho                                           Idaho
Aon Risk Services, Inc. of Indiana                                         Indiana
Aon Risk Services, Inc. of Kentucky                                        Kentucky
Aon Risk Services, Inc. of Louisiana                                       Louisiana
Aon Risk Services, Inc. of Massachusetts                                   Massachusetts
Aon Risk Services, Inc. of Michigan                                        Michigan
Aon Risk Services, Inc. of Montana                                         Montana
Aon Risk Services, Inc. of Nevada                                          Nevada
Aon Risk Services, Inc. of New York                                        New York
Aon Risk Services, Inc. of Northern California Insurance Services          California
Aon Risk Services, Inc. of Ohio                                            Ohio
Aon Risk Services, Inc. of Oklahoma                                        Oklahoma
Aon Risk Services, Inc. of Rhode Island                                    Rhode Island
Aon Risk Services, Inc. of Southern California Insurance Services          California
Aon Risk Services, Inc. of Tennessee                                       Tennessee
Aon Risk Services, Inc. of the Carolinas                                   North Carolina

                                     - 9 -
<PAGE>
Aon Risk Services, Inc. of Utah                                            Utah
Aon Risk Services, Inc. of Virginia                                        Virginia
Aon Risk Services, Inc. of Washington                                      Washington
Aon Risk Services, Inc. of Wyoming                                         Wyoming
Aon Risk Services, Inc. U.S.A.                                             New York
Aon Risk Strategies, Inc.                                                  Delaware
Aon Risk Technologies, Inc.                                                Delaware
Aon Securities Corporation                                                 New York
Aon Select, Inc.                                                           Pennsylvania
Aon Service Corporation                                                    Illinois
Aon Services Group Limited                                                 United Kingdom
Aon Services Group of Tennessee, Inc.                                      Tennessee
Aon Services Group, Inc.                                                   Delaware
Aon Sigorta Brokerlik ve Musavirlik AS                                     Turkey
Aon Slovensko spol.s r.o.                                                  Slovak Republic
Aon South Africa (Pty) Ltd.                                                South Africa
Aon Space SA                                                               France
Aon Special Risks, Inc.                                                    Illinois
Aon Specialty  Denmark A/S                                                 Denmark
Aon Specialty Re, Inc.                                                     Illinois
Aon Stockholm AB                                                           Sweden
Aon Superannuation Pty Limited                                             Australia
Aon Surety & Guarantee Limited                                             United Kingdom
Aon Sweden AB                                                              Sweden
Aon Sweden Syd AB                                                          Sweden
Aon Technical Insurance Services, Inc.                                     Illinois
Aon Telecom, Inc.                                                          Illinois
Aon Trade Credit Insurance Services, Inc.                                  California
Aon Trade Credit, Inc.                                                     New York
Aon Trade Credit, Inc.                                                     Illinois
Aon UK Holdings Limited                                                    United Kingdom
Aon UK Limited                                                             United Kingdom
Aon Vietnam                                                                Vietnam
Aon Wardon Corretora de Seguros Ltda.                                      Brazil
Aon Warranty Group Limited (UK)                                            United Kingdom
Aon Warranty Group, Inc.                                                   Illinois
Aon Warranty Services do Brazil Ltda.                                      Brazil
Aon Warranty Services, Inc.                                                Illinois
Aon Worldwide Resources, Inc.                                              Illinois
Aon/Albert G. Ruben Company (New York) Inc.                                New York
Aon/Albert G. Ruben Insurance Services, Inc.                               California
Aon/Brockinton Agency of Texas, Inc.                                       Texas
Aon/Saiz Consulting S.A.                                                   Colombia
Aon/Saiz Limitada Barranquilla Corredores de Seguros                       Colombia
AOPA Insurance Agency, Inc.                                                Maryland
AOPA Insurance Agency, Inc.                                                Texas
APM Services Limited                                                       Hong Kong
Aporia Leasing Limited                                                     United Kingdom
APS International Limited                                                  United Kingdom
APS Life & Pensions Limited                                                United Kingdom
APS Overseas Investments Limited                                           United Kingdom

                                     - 10 -
<PAGE>
ARM COVERAGE INC                                                           New York
ARS Holdings, Inc.                                                         Illinois
ARS Holdings, Inc.                                                         Louisiana
Artscope Insurance Services Limited                                        United Kingdom
Artscope International Insurance Services Limited                          United Kingdom
Ascom Nijmegen B.V.                                                        Netherlands
ASCOMIN S.A.                                                               Belgium
Asesores Kennedy Agente de Seguros y de Fianzas, S.A. de C.V.              Mexico
Asesores y Corredores De Seguros, S.A.                                     Republica Dominica
Asia Area Underwriters Ltd.                                                Hong Kong
Asian American Finance Limited                                             Bermuda
Asian Reinsurance Underwriters Ltd.                                        Hong Kong
Assekurazkontor fur Industrie und Verkehr GmbH                             Germany
Assistance Au Management Et A La Prevention Des Risques De L'Entrep        France
Associated Brokers International                                           Zimbabwe
Associated Fund Adminstrators Botswana (Pty) Limited                       Botswana
Associated Ins. Broker of Botswana                                         Botswana
Assuco Holdings Ltd.                                                       Guernsey
Assurantie Groep Langeveldt c.v.                                           Netherlands
ATJ Capital Forsakringsmakleri AB                                          Sweden
Atkins Kroll Insurance Inc.                                                Guam
Atlanta International Insurance Company                                    New York
Atlanta International Insurance Company                                    New York
Attorneys' Advantage Insurance Agency, Inc.                                Illinois
AUSCO, Inc.                                                                Illinois
Auto Conduit Corporation, The                                              Delaware
Auto Insurance Specialists - Bay Area, Inc.                                California
Auto Insurance Specialists - Inland Empire, Inc.                           California
Auto Insurance Specialists - Long Beach, Inc.                              California
Auto Insurance Specialists - Los Angeles, Inc.                             California
Auto Insurance Specialists - Newport, Inc.                                 California
Auto Insurance Specialists - San Gabriel Valley, Inc.                      California
Auto Insurance Specialists - Santa Monica, Inc.                            California
Auto Insurance Specialists - Valley, Inc.                                  California
Auto Insurance Specialists, Incorporated                                   California
Automotive Development Centers, Inc.                                       Illinois
Automotive Warranty Services of Florida, Inc.                              Florida
Automotive Warranty Services, Inc.                                         Delaware
AV Agrar Versicherungsdienst GmbH                                          Germany
Ayala-Bain Insurance Company                                               Philippines
B E P International (Canada) Holding Inc.                                  Canada
B E P International Corp.                                                  New Jersey
B E P International Holding Inc.                                           Canada
B E P International US Inc.                                                Delaware
B.L. Carnie Hogg Robinson Ltd.                                             United Kingdom
B.N. Shepp  Associates Ltd.                                                Alberta
B.N.H. Group Ltd.                                                          United Kingdom
B.V. Assurantiekantoor Langeveldt-Schroder                                 Netherlands
Bailiwick Consultancy & Management Co. Ltd.                                Guernsey
Bain Clarkson (HK) Ltd.                                                    Hong Kong
Bain Clarkson Forsakringskonsult AB, Stockholm                             Sweden

                                     - 11 -
<PAGE>
Bain Clarkson Limited                                                      United Kingdom
Bain Clarkson Members Underwriting Agency Ltd.                             United Kingdom
Bain Clarkson R.B. Ltd.                                                    United Kingdom
Bain Clarkson Sweden A.B.                                                  Sweden
Bain Clarkson Underwriting Management Ltd.                                 United Kingdom
Bain Dawes (London) Ltd.                                                   United Kingdom
Bain Dawes Services Ltd.                                                   United Kingdom
Bain Hogg (Americas), Inc.                                                 Florida
Bain Hogg (Fiji) LTd                                                       Fiji
Bain Hogg (Vanuatu) Ltd.                                                   Vanuatu
Bain Hogg Australia (Holdings) Ltd.                                        Australia
Bain Hogg Australia (Investments) Pty Ltd.                                 Australia
Bain Hogg Australia Ltd.                                                   Australia
Bain Hogg Chile S.A. Corredoros de Reasguro                                Chile
Bain Hogg Colombiana Ltd.                                                  Colombia
Bain Hogg Group Limited                                                    United Kingdom
Bain Hogg Hellas Ltd.                                                      United Kingdom
Bain Hogg Holdings Limited                                                 United Kingdom
Bain Hogg Insurance Management (Guernsey) Ltd.                             Guernsey
Bain Hogg Insurance Management (Isle of Man) Ltd.                          Isle of Man
Bain Hogg Intermediaro de Reaseguro SA de CV                               Mexico
Bain Hogg International Holdings Ltd.                                      United Kingdom
Bain Hogg International Ltd.                                               United Kingdom
Bain Hogg Ltd.                                                             United Kingdom
Bain Hogg Malawi Ltd.                                                      Malawi
Bain Hogg Management Ltd.                                                  United Kingdom
Bain Hogg New Zealand Ltd.                                                 New Zealand
Bain Hogg Pensions Pty Ltd.                                                Australia
Bain Hogg Robinson Pty Ltd.                                                Australia
Bain Hogg Russian Insurance Brokers Ltd.                                   Russia
Bain Hogg Solomon Islands Ltd.                                             Solomon Islands
Bain Hogg Trustees Ltd.                                                    United Kingdom
Bain Hogg Uganda Ltd.                                                      Uganda
Bain Insurance Brokers Kenya Ltd.                                          Kenya
Bankers Insurance Service Corp.                                            Illinois
Baoviet Inchcape Insurance Brokers Ltd.                                    Vietnam
Barros & Carrion, Inc.                                                     Puerto Rico
BEC Insurance Services Limited                                             United Kingdom
Beck Kudlich Pacific Associates, Inc.                                      Hawaii
Bekouw Mendes C.V.                                                         Netherlands
Bekouw Mendes Reinsurance B.V.                                             Netherlands
Bekouw Mendes Risk Management B.V.                                         Netherlands
Bell Nicholson Henderson (Holdings) Ltd.                                   United Kingdom
Bell Nicholson Henderson Ltd.                                              United Kingdom
Bene-Fund Administrative Services Ltd.                                     Canada
BenefitsMedia, Inc.                                                        Tennessee
Benoit & Borg (Europe) Limited                                             Ireland
Berkely Agency Ltd.                                                        New York
Berkely Coverage Corporation                                               New York
Berkely-ARM, Inc.                                                          New York
BerkelyCare, LTD                                                           New York

                                     - 12 -
<PAGE>
BH No. 1 Ltd.                                                              United Kingdom
BHR, Inc.                                                                  Delaware
Black Portch & Swain (Financial Services) Ltd.                             United Kingdom
Black Portch & Swain Ltd.                                                  United Kingdom
Bloemers & Co. Herverzekering bv                                           Netherlands
Blom & Van der Aa BV                                                       Netherlands
Blom & Van der Aa Holding BV                                               Netherlands
Boels & Begault France S.A.                                                France
Boels & Begault Luxembourg S.a.r.l.                                        Luxembourg
Boels & Begault Re S.A.                                                    Belgium
Boels & Begault Vlaanderen S.A.                                            Belgium
Boels Begault Holding SA                                                   Belgium
Bonnor & Company A/S                                                       Denmark
Bowes & Company, Inc., of New York                                         New York
Bowes Holdings, Inc.                                                       Illinois
Bowring and Minet (Swaziland) (Pty) Ltd.                                   Swaziland
Brennan Group, Inc., The                                                   Delaware
BRIC, Inc.                                                                 North Carolina
British Continental and Overseas Agencies (BCOA) SA                        France
Broadgate Holdings Ltd.                                                    United Kingdom
Brons Orobio Groep B.V.                                                    Netherlands
Brons Van Lennep B.V.                                                      Netherlands
Brons Van Lennep Den Haag B.V.                                             Netherlands
Bruno Sforni S.p.A.                                                        Italy
Bruns Ten Brink & Co. b.v.                                                 Netherlands
Bruns Ten Brink Groep b.v.                                                 Netherlands
Bruns Ten Brink Herverzekeringen b.v.                                      Netherlands
Bryson Associates Incorporated                                             Pennsylvania
Bryson Associates Incorporated                                             Ohio
Bryson Associates Incorporated of Georgia                                  Georgia
Bureau d'Assurances Pirrotte GmbH                                          Luxembourg
Bureau d'Assurances Pirrotte GmbH & Co. KG                                 Luxembourg
Burlington Insurance Services Ltd.                                         United Kingdom
Burnio Enterprises Pty. Ltd.                                               Papua New Guinea
C A Robinson & Partners Ltd.                                               United Kingdom
C.I.C. Realty, Inc.                                                        Illinois
C.V. 'T Huys Ter Merwe                                                     Netherlands
California Group Services                                                  California
Cambridge Integrated Services Group, Inc.                                  New Jersey
Cambridge Professional Liability Services, Inc.                            Illinois
Cambridge Professional Liability Services, Inc.                            Pennsylvania
Cambridge Professional Liability Services, Inc.                            Florida
Cambridge Settlement Services, Inc.                                        Minnesota
Campbell & Co., Inc.                                                       Idaho
Camperdown 100 Limited                                                     United Kingdom
Camperdown 101 Limited                                                     United Kingdom
Cananwill Canada Limited                                                   Ontario
Cananwill Corporation                                                      Delaware
Cananwill Receivables Purchase Facility, L.L.C.                            Delaware
Cananwill UK Limited                                                       United Kingdom
Cananwill UK Limited                                                       United Kingdom

                                     - 13 -
<PAGE>
Cananwill, Inc.                                                            California
Cananwill, Inc.                                                            Pennsylvania
Cananwill, Inc.                                                            U.S. Virgin Islands
CAP Managers Ltd.                                                          Bermuda
Captive Assurance Partners                                                 California
Carl D. Jacobs & Associates, Inc.                                          California
Carstens & Schues GmbH & Co.                                               Germany
Carstens & Schues Poland Ltd.                                              Poland
Carstens & Schues Verwaltungs GmbH                                         Germany
Catz & Lips B.V.                                                           Netherlands
CCC Agency, Inc. of Illinois                                               Illinois
CCM McGrath Berrigan Ltd.                                                  Ireland
CD Benefit, Inc.                                                           Texas
CECAR - Compagnie Europeene de Courtage d'Assurances et de Reassu          France
CECAR Deutschland GmbH                                                     Germany
CECAR Inchcape Asia Ltd.                                                   Hong Kong
CECAR Portugal                                                             Portugal
Centris Services Limited                                                   United Kingdom
Centurion, Agente de Seguros, S.A. de C.V.                                 Mexico
Chemical & Oil Insurance Brokers (Pty) Ltd.                                South Africa
Christopher Paul Insurance Services Ltd.                                   United Kingdom
CIA Deutschland Kreditversicherungsmakler und Beratungs GmbH               Germany
CIA Italia S.R.L.                                                          Italy
CIA Link Ltd.                                                              United Kingdom
CIA Supplier Finance Ltd.                                                  United Kingdom
CIA USA Holdings, Inc.                                                     Delaware
CIC - Hilldale, Inc.                                                       Illinois
CIC - Wells, Inc.                                                          Illinois
CIC - Westmont, Inc.                                                       Illinois
CICA - Court, Inc.                                                         Illinois
CICA Realty Corporation                                                    Illinois
CICA Superannuation Nominees Pty. Ltd.                                     Australia
Cinema Completions International, Inc.                                     Delaware
Citadel Insurance Company                                                  Texas
City and County Purchasing Group                                           Unknown
Citytrust Insurance Brokers Association                                    Philippines
CJP, Inc.                                                                  Delaware
Claims Control Ltd.                                                        New Zealand
Clarkson Bain Japan Ltd.                                                   United Kingdom
Clarkson LMS Ltd.                                                          United Kingdom
Clarkson Puckle Group, Ltd.                                                Unknown
Clarkson Puckle Holdings Ltd.                                              United Kingdom
Clarkson Puckle Ibex Ltd.                                                  United Kingdom
Clarkson Puckle Ltd.                                                       United Kingdom
Clarkson Puckle Marine Holdings Ltd.                                       United Kingdom
Clarkson Puckle Overseas Holdings Ltd.                                     United Kingdom
Clay & Partners (1987) Limited                                             United Kingdom
Clay & Partners Independent Trust Corporation Ltd.                         United Kingdom
Clay & Partners Ltd.                                                       United Kingdom
Clay & Partners Pension Trustees Limited                                   United Kingdom
Claytime Ltd.                                                              United Kingdom

                                     - 14 -
<PAGE>
Clinton, Curtis, Melling Ltd.                                              Ireland
Cogrup Correduria de Seguros, S.A.                                         Spain
Cogrup, S.L.                                                               Spain
Cole Booth Potter of New Jersey, Inc.                                      New Jersey
Cole, Booth, Potter, Inc.                                                  Pennsylvania
Columbia Automotive Services, Inc.                                         Illinois
Combined Administrative Services Corp.                                     Illinois
Combined Insurance Company de Argentina S.A. Compania de Seguros           Argentina
Combined Insurance Company of America                                      Illinois
Combined Insurance Company of Ireland Limited                              Ireland
Combined Insurance Company of New Zealand Limited                          New Zealand
Combined Life Assurance Company Limited                                    United Kingdom
Combined Life Assurance Company of Europe Limited                          Ireland
Combined Life Insurance Company of Australia Limited                       Australia
Combined Life Insurance Company of New York                                New York
Combined Seguros Mexico, S.A. de C.V.                                      Mexico
Commercial and Political Risk Consultants Ltd.                             United Kingdom
Commercial and Political Risk Services Ltd.                                United Kingdom
Commercial Credit Corporation                                              United Kingdom
Compagnie Franco-Belge d'Investissement et de Placement                    Belgium
CompLogic, Inc.                                                            Rhode Island
Consumer Program Administrators, Inc.                                      Illinois
Contract & Investment Recoveries Ltd.                                      United Kingdom
Corks Bay & Fisher Ltd.                                                    United Kingdom
Corks Bays & Fisher (Life & Pensions) Ltd.                                 United Kingdom
Corporacion Gil y Carvajal, SA                                             Spain
Corporation Long Island CA                                                 Venezuela
Coughlan General Insurances Limited                                        Ireland
Couparey Nominees Ltd.                                                     United Kingdom
Cranebox Ltd.                                                              United Kingdom
Credit & Political Insurance Services Ltd.                                 United Kingdom
Credit & Political Risks Reinsurance Consultants Ltd.                      United Kingdom
Credit Indemnity & Financial Services Ltd.                                 United Kingdom
Credit Insurance Research Unit Ltd.                                        United Kingdom
CRiON nv                                                                   Belgium
Crotty MacRedmond Insurance Limited                                        Ireland
Custom Risk Solutions, Inc.                                                Illinois
Customer Loyalty Institute, Inc.                                           Michigan
D. Hudig & Co. b.v.                                                        Netherlands
DA&A Insurance Agency, Inc.                                                Texas
Dale Intermediaries Ltd. / Les Intermediaires Dale Ltee                    Canada
Dale-Parizeau International Inc.                                           Canada
Dale-Parizeau Management Ltd.                                              Bermuda
Dealer Development Services, Ltd.                                          United Kingdom
Deanborne Limited                                                          United Kingdom
Denison Pension Trustees Ltd.                                              United Kingdom
Diot Minet (France) SA                                                     France
Dobson Park L. G. Limited                                                  Guernsey
Document Risk Management Limited                                           United Kingdom
Dominion Mutual Insurance Brokers Ltd.                                     Canada
Don Flower Aviation Underwriters, Inc.                                     Kansas

                                     - 15 -
<PAGE>
Dormante Holdings Limited                                                  United Kingdom
Downes & Burke (Special Risks) Ltd.                                        United Kingdom
Dreadnaught Insurance Company Limited                                      Bermuda
Duggan Insurances Limited                                                  Ireland
Dunn-Parizeau (1995) Inc.                                                  Quebec
DUO A/S                                                                    Norway
Duoband Enterprises Ltd.                                                   United Kingdom
DuPage Care Administrators, Inc.                                           Illinois
Durin Financial Corporation                                                Wisconsin
E. Lillie & Co. Limited                                                    United Kingdom
Eastaf Holdings Ltd.                                                       United Kingdom
Eastward Insurance Services Limited                                        Unknown
EBRM Risk Management & Consulting, L.L.C.                                  Delaware
ECCO Services, Inc.                                                        Texas
Edgar Ward Ltd.                                                            United Kingdom
Edmundo Claro y Compania S.A. Vida y Beneficios                            Chile
Edward Lumley & Sons (Underwriting Agencies) Ltd.                          United Kingdom
EIA Risk Management Center, Inc.                                           California
Elektrorisk Beheer bv                                                      Netherlands
Elm Lane Limited                                                           United Kingdom
Employee Benefit Communications, Inc.                                      Florida
Energy Insurance Brokers & Risk Management Consultants Ltd.                United Kingdom
ENTAB Insurance Services Ltd.                                              United Kingdom
Entertainment Managers Insurance Agency of New York, Inc.                  New York
Entertainment Managers Insurance Services, Inc.                            California
Entertainment Managers Insurance Services, Inc.                            Ontario
ERAS (International) Ltd.                                                  United Kingdom
Ernest A. Notcutt & Co. Ltd.                                               United Kingdom
Ernest A. Notcutt (Overseas) Ltd.                                          United Kingdom
Ernest Notcutt Insurance Services Ltd.                                     United Kingdom
Essar Insurance Consultants Ltd.                                           Taiwan
Essar Insurance Services Ltd.                                              Hong Kong
Europa Services Ltd.                                                       Malta
Ewbar Limited                                                              United Kingdom
ExcelNet (Guernsey) Ltd.                                                   Guernsey
ExcelNet Ltd.                                                              United Kingdom
Excess Underwriters Agency, Inc.                                           New York
Excess Versicherungsagentur GmbH                                           Germany
EXKO Excess Versicherungsagentur GmbH                                      Germany
Expatriate Consultancy Limited, The                                        United Kingdom
Fabels-Versteeg b.v.                                                       Netherlands
Far East Agency                                                            Korea
Fides Alexander (A.G.) Switzerland                                         Switzerland
Figurecheck Ltd.                                                           United Kingdom
Finance Associates, Inc.                                                   Texas
Financial Solutions Insurance Services, Inc.                               Illinois
Firma A.J.  Driessen C.V.                                                  Netherlands
Forsakringsmaklarna Syd KB                                                 Sweden
France Cote D'Afrique                                                      France
France Fenwick Limited                                                     United Kingdom
Frank B. Hall & Co. (N.S.W.) Pty. Ltd.                                     Australia

                                     - 16 -
<PAGE>
Frank B. Hall & Co. Holdings (N.Z.) Limited                                New Zealand
Frank B. Hall (Ireland) Limited                                            Ireland
Frank B. Hall (Reinsurance) France S.A.                                    France
Frank B. Hall (Underwriting Managers) Ltd.                                 Bermuda
Frank B. Hall Insurance Brokers (S) Pte. Ltd.                              Singapore
Frank B. Hall Re (Latin America) Inc.                                      Panama
Friis & Company, Inc.                                                      California
FS Insurance Agency of California, Inc.                                    California
FS Insurance Agency, Inc.                                                  Ohio
Futuro 3000 S.R.L                                                          Italy
G.E.F. Insurance Ltd.                                                      U.S. Virgin Islands
Galaher Settlements and Insurance Services Company, Inc.                   California
Galaher Settlements Company of New York, Inc.                              New York
Garantie Europeene de Publication S.A.                                     France
Gardner Mountain Barr, Inc.                                                New York
Gardner Mountain Financial Services Ltd.                                   United Kingdom
Gardner Mountain Management Services Ltd.                                  United Kingdom
Gardner Mountain Trustees Ltd.                                             United Kingdom
Gateway Alternatives, L.L.C.                                               Delaware
Gateway Insurance Company, Ltd.                                            Bermuda
Gestas (1995) Inc.                                                         Canada
Gil y Carvajal Chile Ltda. Corredores de Seguros                           Chile
Gil y Carvajal Reasseguros, SA                                             Spain
Gil y Carvajal Seguros, SA                                                 Spain
Gilliland & McReynolds, Inc.                                               Texas
Gilman Swire Willis Ltd.                                                   Hong Kong
Gilroy Broome & Scrini (Trustees) Ltd.                                     United Kingdom
Global Entertainment & Media Insurance Agency, L.L.C.                      California
Global Entertainment & Media Insurance Agency, L.L.C.                      Illinois
Global Entertainment & Media Insurance Agency, L.L.C.                      New York
Go Pro Agency, Inc. of San Antonio                                         Texas
Go Pro Life Agency, Inc. of San Antonio                                    Texas
Go Pro Underwriting Managers of Virginia, Inc.                             Virginia
Go Pro Underwriting Managers, Inc.                                         Texas
Godwins (Overseas) Limited                                                 United Kingdom
Godwins (Trustees) Limited                                                 United Kingdom
Godwins Acquisition Co.                                                    North Carolina
Godwins Group Limited                                                      United Kingdom
Godwins Limited                                                            United Kingdom
Gotuaco del Rosario & Associates, Inc.                                     Philippines
Gras Savoye Rumania                                                        Romania
Greville Baylis Parry & Associates Ltd.                                    United Kingdom
Greyfriars Marketing Services Pty Ltd.                                     Australia
Group Le Blanc de Nicolay SA                                               France
Groupe DPI Inc.                                                            Quebec
Groupement Europeen d'Assurances Generales                                 France
Growth Enterprises Ltd.                                                    Bahamas
Guardrisk Insurance Company Limited                                        South Africa
Guernsey Nominees (Pty) Limited                                            Guernsey
Gwelforth Ltd.                                                             United Kingdom
H.A.R.B. Ltd.                                                              United Kingdom

                                     - 17 -
<PAGE>
H.L. Puckle (Underwriting) Ltd.                                            United Kingdom
H.Z. Financial, L.P.                                                       Illinois
Hadenmead Ltd.                                                             United Kingdom
Halford, Shead & Co. Limited                                               United Kingdom
Hall & Company (Overseas) Ltd.                                             United Kingdom
Hall & Company (UK) Ltd.                                                   United Kingdom
Hamburger Gesellschaft zur Forderung des Versicherungswesen mbH            Germany
Hamburger Ruckversicherungs - Agentur GmbH                                 Germany
Hanse Assekuranz-Vermittlungs GmbH                                         Germany
Hanseatische Assekuranz Kontor GmbH                                        Germany
Hanseatische Assekuranz Vermittlungs AG                                    Germany
Harbour Pacific  Holdings Pty., Ltd.                                       Australia
Harbour Pacific Underwriting Management Pty Limited                        Australia
Heath Hudig Langeveldt Sdn. Bhd                                            Malaysia
Heiland Versicherungs-Service GmbH                                         Germany
Heli Agency                                                                Korea
Hellenic Bain Hogg S.A.                                                    Greece
Hemisphere Marine & General Assurance Ltd.                                 Bermuda
HHL (Taiwan) Ltd.                                                          Taiwan
HHL Reinsurance Brokers Inc.                                               Philippines
HHL Reinsurance Brokers Pte. Ltd.                                          Singapore
HHL Reinsurance Services Sdn. Bhd                                          Malaysia
Highplain Limited                                                          United Kingdom
Hobbs & Partners Ltd.                                                      United Kingdom
Hodgson McCreery & Company Limited                                         United Kingdom
Hogg Automotive Insurance Services Ltd.                                    United Kingdom
Hogg Group Overseas Ltd.                                                   United Kingdom
Hogg Group plc                                                             United Kingdom
Hogg Robinson & Gardner Mountain (Insurance) Ltd.                          United Kingdom
Hogg Robinson (Nigeria) Unlimited                                          Nigeria
Hogg Robinson (Scotland) Ltd.                                              Scotland
Hogg Robinson Holdings (Pty) Ltd.                                          South Africa
Hogg Robinson North America, Inc.                                          Delaware
Hogg Robinson Services (Kenya) Ltd.                                        Kenya
Howden Chile Consultores Ltda.                                             Chile
Howden Chile Reaseguros Ltda                                               Chile
Howden Cover Hispanoamericana (Bermuda) Ltd.                               Bermuda
Howden Dastur Reinsurance Brokers (Private) Ltd.                           India
Howden Management & Data Services Ltd.                                     United Kingdom
Howden Sterling Asia Limited                                               Hong Kong
Howell King & Company Ltd.                                                 United Kingdom
HRGM 1989 Ltd.                                                             United Kingdom
HRGM Cargo Ltd.                                                            United Kingdom
HRGM Ltd.                                                                  United Kingdom
HRGM Management Services Ltd.                                              United Kingdom
HRGM Marine Ltd.                                                           United Kingdom
Hudig Langeveldt Pte Ltd.                                                  Singapore
Hudig-Langeveldt Coens N.V.                                                Belgium
Hudig-Langeveldt Janson Elffers B.V.                                       Netherlands
Hudig-Langeveldt Kyoritsu Ltd.                                             Japan
Hudig-Langeveldt Makelaardij in Assurantien bv                             Netherlands

                                     - 18 -
<PAGE>
Hudig-Langeveldt Pensioenbureau B.V.                                       Netherlands
Hudig-Langeveldt Reinsurance B.V.                                          Netherlands
Hudig-Langeveldt Saat B.V.                                                 Netherlands
Human Relations Strategies Limited                                         United Kingdom
Huntington T. Block Insurance Agency, Inc.                                 District of Columbia
Huntington T. Block Insurance Agency, Inc.                                 Ohio
Hydrocarbon Risk Consultants Ltd.                                          United Kingdom
Ibex Managers Ltd.                                                         Kenya
Impact Forecasting, L.L.C.                                                 Illinois
Inchcape Continental Insurance Holdings (Eastern Europe) Ltd.              Cyprus
Inchcape Continental Insurance Holdings BV                                 Netherlands
Inchcape H.R. (Asia) Ltd.                                                  Hong Kong
Inchcape Insurance Agencies (HK) Ltd.                                      Hong Kong
Inchcape Insurance Agencies Pte Ltd.                                       Singapore
Inchcape Insurance Brokers (HK) Ltd.                                       Hong Kong
Inchcape Insurance Brokers (M) Sdn Bhd                                     Malaysia
Inchcape Insurance Brokers (Thailand ) Ltd.                                Thailand
Inchcape Insurance Holdings (HK) Ltd.                                      Hong Kong
Inchcape Insurances (Macau) Ltd.                                           Macau
Indemnity Insurance Services (Pty) Limited                                 South Africa
Independent Engineering Services Ltd.                                      United Kingdom
Industrie Assekuranz Gmbh                                                  Germany
Inmobiliaria Ramos Rosada, S.A. de C.V.                                    Mexico
Innovative Services International Limited                                  United Kingdom
Innovative Services International, L.L.C.                                  Delaware
Insurance Administrators Inc.                                              Texas
Insurance Brokers Service, Inc.                                            Illinois
Insurance Broking Services (Pty) Limited                                   Guernsey
Insurance Holdings Africa Ltd.                                             Kenya
Insurance Planning, Inc.                                                   Nevada
Insurance Underwriters Agency, Inc.                                        Arizona
Integrated Risk Finance Limited                                            United Kingdom
Integrated Risk Resources Limited                                          United Kingdom
Interbroke Ltd.                                                            Switzerland
Interglobe Management AG                                                   Switzerland
Interims Limited                                                           United Kingdom
International Aviation Brokers SA                                          France
International Industrial Insurances Limited                                Ireland
International Insurance Brokers Ltd.                                       Jamaica
International Insurance Brokers Ltd.                                       New Zealand
International Shipowners Mutual Insurance Association Limited              Bermuda
International Space Brokers Inc.                                           Virginia
Interocean (Italia) S.p.A                                                  Italy
Interocean Reinsurance Company, S.A.                                       Panama
Investment Facility Company Four One Two (Pty) Ltd.                        South Africa
Investment Insurance International (Managers) Ltd.                         United Kingdom
IOC Reinsurance Brokers Ltd.                                               Canada
IRBJ Disposition Company                                                   United Kingdom
IRISC Claims Management Limited                                            United Kingdom
IRISC L.L.C.                                                               Delaware
IRISC Limited                                                              United Kingdom

                                     - 19 -
<PAGE>
IRISC Specialty, Inc.                                                      Delaware
IRISC Technical Services (Hong Kong) Limited                               Hong Kong
IRM France S.A.                                                            France
ISPP Purchasing Group                                                      Missouri
ITA Insurance, Inc.                                                        Utah
ItalCECAR S.p.A.                                                           Italy
J H  Minet (Insurance) Ltd.                                                Ireland
J H Minet & Company  (Tanzania) Ltd.                                       Tanzania
J H Minet (Inter-Gremium) AG                                               Switzerland
J H Minet Agencies Ltd.                                                    United Kingdom
J H Minet Puerto Rico Inc.                                                 Puerto Rico
J H Minet Reinsurance Brokers Ltd.                                         United Kingdom
J&H Risk Management Consultants GmbH                                       Germany
J&H Unison Holdings BV                                                     Netherlands
J&H Vorsorgefonds                                                          Switzerland
J.H. Blades & Co. (Agency), Inc.                                           Texas
J.H. Blades & Co., Inc.                                                    Texas
J.H. Blades Insurance Services                                             California
J.H. Blades, Inc.                                                          Oklahoma
J.H. Lea & Company, Inc.                                                   Illinois
J.S. Johnson & Co. Ltd.                                                    Bahamas
James F. Caird, Inc.                                                       California
James S. Kemper & Co. International Ltd.                                   Bermuda
Jaspers Industrie Assekuranz GmbH & Co. KG                                 Germany
Jauch & Hubener (KG)                                                       Austria
Jauch & Hubener AG                                                         Switzerland
Jauch & Hubener Beratungs AG                                               Switzerland
Jauch & Hubener CSFR Spol s.r.o.                                           Slovak Republic
Jauch & Hubener d.o.o.                                                     Slovak Republic
Jauch & Hubener do Brasil Ltda.                                            Brazil
Jauch & Hubener Ges mbH & Co. KG                                           Austria
Jauch & Hubener GmbH                                                       Austria
Jauch & Hubener Kft.                                                       Hungary
Jauch & Hubener KGaA                                                       Germany
Jauch & Hubener Management betriebliche Versorgungen                       Germany
Jauch & Hubener Personalvorsorgestiftung                                   Switzerland
Jauch & Hubener Privates Vorsorgemanagement GmbH                           Germany
Jauch & Hubener Reinsurance Brokers Ltd.                                   United Kingdom
Jauch & Hubener Reinsurance Inter. Services of North America               New Jersey
Jauch & Hubener Ruckversicherungs-Vermittlungsges mbH                      Germany
Jauch & Hubener spol sro                                                   Czech Republic
Jauch & Hubener Vergutungs-und Vorsorgemanagement GmbH                     Germany
Jauch & Hubener Verwaltungs- GmbH                                          Germany
Jenner Fenton Slade (Special Risks) Limited                                United Kingdom
Jenner Fenton Slade Group Limited                                          United Kingdom
Jenner Fenton Slade Limited                                                United Kingdom
Jenner Fenton Slade Political Risks Limited                                United Kingdom
Jenner Fenton Slade Reinsurance Brokers Limited                            United Kingdom
Jenner Fenton Slade Surety and Specie Limited                              United Kingdom
JFC Consulting, Inc.                                                       Delaware
JFS (Sudamerica) SA                                                        Uruguay

                                     - 20 -
<PAGE>
JFS Fenchurch Limited                                                      United Kingdom
JFS Greig Fester Limited                                                   United Kingdom
JML-Minet A.G.                                                             Switzerland
John C. Lloyd Reinsurance Brokers Ltd.                                     Australia
John Scott Insurance Brokers Limited                                       United Kingdom
Johnson & Higgins PB Co.                                                   Thailand
Joost & Preuss GmbH                                                        Germany
Joseph U. Moore, Inc.                                                      Florida
Jover Prevision Correduria de Seguros                                      Spain
K & K Insurance Brokers, Inc. Canada                                       Ontario
K & K Insurance Group of Florida, Inc.                                     Florida
K & K Insurance Group, Inc.                                                Indiana
K & K Insurance Specialties, Inc.                                          Indiana
K & K of California Insurance Services, Inc.                               California
K & K of Nevada, Inc.                                                      Nevada
K & K Specialties, Inc.                                                    Indiana
Karl Alt & Co. GmbH                                                        Germany
Keeling & Company                                                          California
Keith Rayment & Associates Ltd.                                            United Kingdom
Key-Royal Automotive Company, Inc.                                         Alabama
Keyaction Ltd.                                                             United Kingdom
Kininmonth Limited                                                         Ireland
Kroller Holdings B.V.                                                      Netherlands
L & G LMX Limited                                                          United Kingdom
L & G Seascope Insurance Holdings Limited                                  United Kingdom
L. & F. Longobardi SRL                                                     Italy
La Societe de Courtage Meloche Alexander Inc.                              Canada
Langeveldt de Vos b.v.                                                     Netherlands
Langeveldt Groep B.V.                                                      Netherlands
Laurila, Kauriala & Grig Ltd.                                              Russia
Laverack & Haines, Inc.                                                    New York
Le Blanc & de Nicolay U.S., Inc.                                           Delaware
Le Blanc de Nicolay Asia                                                   Hong Kong
Le Blanc de Nicolay Assurance SA                                           France
Le Blanc de Nicolay Brazil                                                 Brazil
Le Blanc de Nicolay Courtage SA                                            France
Le Blanc de Nicolay Iberica                                                Spain
Le Blanc de Nicolay Reassurances SA                                        France
Le Blanc de Nicolay Riassicurazione                                        Italy
Le Blanc de Nicolay Ruck                                                   Germany
Le Blanc de Nicolay Zurich                                                 Switzerland
Les Intermediaires Dale-Parizeau Itee                                      Canada
Lescorp Limited                                                            United Kingdom
Leslie & Godwin (C.I.) Limited                                             Guernsey
Leslie & Godwin (Reinsurance) Copenhagen A/S                               Denmark
Leslie & Godwin (Scotland) Limited                                         Scotland
Leslie & Godwin (U.K.) Limited                                             United Kingdom
Leslie & Godwin (WFG) Limited                                              United Kingdom
Leslie & Godwin Aviation Holdings Limited                                  United Kingdom
Leslie & Godwin Aviation Limited                                           United Kingdom
Leslie & Godwin Aviation Reinsurance Services Limited                      United Kingdom

                                     - 21 -
<PAGE>
Leslie & Godwin AXL Limited                                                United Kingdom
Leslie & Godwin Financial Risks Limited                                    United Kingdom
Leslie & Godwin GmbH                                                       Germany
Leslie & Godwin Group Limited                                              United Kingdom
Leslie & Godwin Insurance Brokers Ltd.                                     Ontario
Leslie & Godwin Insurance Brokers, Inc.                                    New York
Leslie & Godwin International Limited                                      United Kingdom
Leslie & Godwin Investments Limited                                        United Kingdom
Leslie & Godwin Limited                                                    United Kingdom
Leslie & Godwin Marine Holdings Limited                                    United Kingdom
Leslie & Godwin Non-Marine Limited                                         United Kingdom
Leslie & Godwin Overseas Reinsurance Holdings Limited                      United Kingdom
Leslie & Godwin Reinsurance Holdings Limited                               United Kingdom
LIB Financial Services Ltd.                                                United Kingdom
LIB Ltd.                                                                   United Kingdom
Lloyd Paulista Corretores de Seguros e Reaseguros S.A.                     Brazil
London General Holdings Limited                                            United Kingdom
London General Insurance Company Limited                                   United Kingdom
Loss Management Group Ltd.                                                 United Kingdom
Lowndes Lambert Insurance Limited                                          Ireland
Lumley Insurance Brokers (Pty) Ltd.                                        South Africa
Lumley JFS Limited                                                         United Kingdom
Lumley Municipal & General Insurance Brokers (Natal) (Pty) Ltd.            South Africa
Lumley Municipal & General Insurance Brokers (Orange Free State) (Pty)     South Africa
Lumley Municipal & General Insurance Brokers (Pty) Ltd.                    South Africa
Lumley Municipal & General Insurance Brokers (Transvaal) (Pty) Ltd.        South Africa
Lumley Petro-Energy Insurance Brokers (Pty) Ltd.                           South Africa
Lynn & Schaller Insurance Brokers, Inc.                                    California
M Y A Ltda. Asesorias Integrales                                           Colombia
M Y A Salud Ltda Agentes De Medicina Prepagada                             Colombia
M&M Insurance Agency, Inc.                                                 Texas
M.I. B. Healthcare Services (Pty) Limited                                  South Africa
M.I.B. Aidec (Pty) Limited                                                 South Africa
M.I.B. Border (Pty) Limited                                                South Africa
M.I.B. Employee Benefits (Pty) Limited                                     South Africa
M.I.B. Group (Pty) Limited                                                 South Africa
M.I.B. Holdings Co. Ltd.                                                   Malta
M.I.B. House Investment (Pty) Limited                                      South Africa
M.I.B. Property Holdings (Pty) Limited                                     South Africa
M.I.B. Reinsurance Brokers (Namibia) (Pty) Limited                         Namibia
M.I.B. Reinsurance Brokers (Pty) Limited                                   South Africa
MAB Insurance Services Ltd.                                                United Kingdom
MacDonagh & Boland Group Limited                                           Ireland
MacDonagh Boland Beech Hill Limited                                        Ireland
MacDonagh Boland Crotty MacRedmond Limited                                 Ireland
MacDonagh Boland Cullen Duggan Limited                                     Ireland
MacDonagh Boland Foley Woollam Limited                                     Ireland
Macey Clifton Walters Limited                                              United Kingdom
Macey Williams Insurance Services Limited                                  United Kingdom
Macey Williams Limited                                                     United Kingdom
Madison Intermediaries Pty. Limited                                        Australia

                                     - 22 -
<PAGE>
Madison Reinsurance Holdings, Inc.                                         Illinois
Mahamy Company plc (Rollins Hudig Hall Iran)                               Iran
Management and Regulator Services, Inc.                                    New York
Mansell Investments Ltd.                                                   Gibraltar
Mansfeld, Hubener & Partners Gmbh                                          Germany
Maritime Underwriters, Ltd.                                                Bermuda
Marketing and Training Resources, Inc.                                     Illinois
Martec Australia Pty Limited                                               Australia
Martec Finance Pty Limited                                                 Australia
Martin Boyer Company, Inc.                                                 Illinois
Marvyn Hughes International Ltd.                                           United Kingdom
Max Mattiessen AB                                                          Sweden
MC Brokers Co. Ltd.                                                        Thailand
Media/Professional Insurance Agency Limited                                United Kingdom
Media/Professional Insurance Agency, Inc.                                  Missouri
Mediterranean Insurance Brokers Ltd.                                       Malta
Mediterranean Insurance Training Centre                                    Malta
MIB UK (Holdings) Ltd.                                                     United Kingdom
Mibsa Investments (Namibia) (Pty) Limited                                  Namibia
Minahan Reinsurance Management Limited                                     United Kingdom
Minerva Holdings (Pvt) Limited                                             Zimbabwe
Minet (Singapore) Pte. Ltd.                                                Singapore
Minet (Taiwan) Ltd.                                                        Taiwan
Minet a.s.                                                                 Czech Republic
Minet AB                                                                   Sweden
Minet Africa Holdings Ltd.                                                 United Kingdom
Minet Agricultural Insurance Brokers Pty. Ltd.                             Australia
Minet Airport Insurance Services Ltd.                                      United Kingdom
Minet Archer Ltd.                                                          New Zealand
Minet AS                                                                   Norway
Minet Australia Holdings Pty. Ltd.                                         Australia
Minet Australia Ltd.                                                       Australia
Minet Benefit Services (International) Ltd.                                Guernsey
Minet Botswana (Pty) Ltd.                                                  Botswana
Minet Burn & Roche Pty. Ltd.                                               Australia
Minet China Ltd.                                                           Hong Kong
Minet Commercial Ltd.                                                      United Kingdom
Minet Consultancy Services Ltd. (Kenya)                                    Kenya
Minet Consultancy Services Ltd. (UK)                                       United Kingdom
Minet Denison Financial Services Ltd.                                      United Kingdom
Minet Denison Insurance Services Ltd.                                      United Kingdom
Minet Direct Marketing Services Ltd.                                       United Kingdom
Minet Duncan Insurance Brokers Ltd.                                        United Kingdom
Minet Employees' Trust Company Ltd.                                        United Kingdom
Minet Europe Holdings Ltd.                                                 United Kingdom
Minet Financial Services Ltd.                                              United Kingdom
Minet Firstbrokers Oy                                                      Finland
Minet Group Holdings                                                       United Kingdom
Minet Group PLC                                                            United Kingdom
Minet Group Services Ltd.                                                  United Kingdom
Minet Holdings Guernsey Limited                                            Guernsey

                                     - 23 -
<PAGE>
Minet Holdings Inc.                                                        New York
Minet Hong Kong Ltd.                                                       Hong Kong
Minet ICDC Insurance Brokers Ltd.                                          Kenya
Minet Inc. (Canada)                                                        Canada
Minet Ins. Brokers (Holdings) (NZ) Ltd.                                    New Zealand
Minet Ins. Brokers (Zimbabwe) (Pvt) Ltd.                                   Zimbabwe
Minet Insurance Brokers (Holdings) Ltd.                                    United Kingdom
Minet Insurance Brokers (Thailand) Ltd.                                    Thailand
Minet Insurance Brokers (Uganda) Limited                                   Uganda
Minet Insurance Brokers, Inc.                                              Unknown
Minet Insurance Services (UK) Ltd.                                         United Kingdom
Minet Insurance Services, Inc.                                             California
Minet Insurance Services, Inc. of Texas                                    Texas
Minet International (Holdings) Ltd.                                        United Kingdom
Minet Italia & Partners SpA                                                Italy
Minet Italia srl                                                           Italy
Minet Kingsway (Lesotho) (Pty) Ltd.                                        Lesotho
Minet Limited                                                              Uganda
Minet Limited (Bermuda)                                                    Bermuda
Minet Lindgren i Helsingborg                                               Sweden
Minet Ltd.                                                                 United Kingdom
Minet Members Agency Holdings Ltd.                                         United Kingdom
Minet New Zealand Ltd.                                                     New Zealand
Minet Nigeria                                                              Nigeria
Minet Nominees Ltd.                                                        United Kingdom
Minet Professional Services (Europe) Ltd.                                  United Kingdom
Minet Professional Services Ltd. (Australia)                               Australia
Minet Professional Services Ltd. (UK)                                      United Kingdom
Minet Properties (1989) Ltd.                                               United Kingdom
Minet Properties Ltd.                                                      United Kingdom
Minet RAIA Insurance Brokers Limited                                       Hong Kong
Minet Re (Bermuda) Limited                                                 Bermuda
Minet Re GmbH                                                              Germany
Minet Re International Ltd.                                                United Kingdom
Minet Re North America, Inc.                                               Georgia
Minet Risk Services (Barbados) Ltd.                                        Barbados
Minet Risk Services (Bermuda) Ltd.                                         Bermuda
Minet Risk Services (Guernsey) Ltd.                                        Guernsey
Minet Risk Services (Jersey) Ltd.                                          Jersey, Channel Islands
Minet Risk Services (Singapore) Ltd.                                       Singapore
Minet Risk Services (Vermont), Inc. (USA)                                  Vermont
Minet S.A. de C.V.                                                         Mexico
Minet Trans Risk Services Ltd.                                             United Kingdom
Minet Trustees Ltd.                                                        United Kingdom
Minet West Africa Ltd.                                                     United Kingdom
Minet Zambia Limited                                                       Zambia
Minet Zimbabwe (Pvt) Ltd.                                                  Zimbabwe
Minken Properties Ltd.                                                     Kenya
MLH & A (Canada) Inc.                                                      Canada
MLH International Inc.                                                     Ontario
Montgomery General Agency of New Jersey, Inc.                              New Jersey

                                     - 24 -
<PAGE>
Morency, Weible & Sapa, Inc.                                               Illinois
Motorists Service Corporation                                              Delaware
Motorplan Limited                                                          United Kingdom
Mt. Franklin General Agency                                                Texas
MTF Insurance Agency, Inc.                                                 Texas
Muirfield Underwriters, Ltd.                                               Delaware
N.V. Verzekering Maatschappij Van 1890                                     Netherlands
National Care Provider Insurance, Inc.                                     California
National Product Care Company                                              Illinois
National Sports Underwriters, Inc.                                         Indiana
National Transportation Adjusters, Inc.                                    Nebraska
NB Life Agents, Inc.                                                       New York
Needler Heath (UK) Ltd.                                                    United Kingdom
Needler Heath Dixon Ltd.                                                   United Kingdom
New Co. #1 L.L.C.                                                          Delaware
Nicholson Chamberlain Colls Australia Limited                              Australia
Nicholson Chamberlain Colls Group Limited                                  United Kingdom
Nicholson Chamberlain Colls Marine Limited                                 United Kingdom
Nicholson Jenner Leslie Group Limited                                      United Kingdom
Nicholson Leslie (North America) Limited                                   United Kingdom
Nicholson Leslie Accident & Health Limited                                 United Kingdom
Nicholson Leslie Agencies Limited                                          United Kingdom
Nicholson Leslie Asia Pte Ltd                                              Singapore
Nicholson Leslie Australia Holdings Limited                                Australia
Nicholson Leslie Aviation Limited                                          United Kingdom
Nicholson Leslie Aviation Reinsurance Brokers                              United Kingdom
Nicholson Leslie BankAssure Limited                                        United Kingdom
Nicholson Leslie Bankscope Insurance Services Limited                      United Kingdom
Nicholson Leslie Bankscope Marine Insurance Consultants                    United Kingdom
Nicholson Leslie Energy Resources Limited                                  United Kingdom
Nicholson Leslie Financial Institutions Limited                            United Kingdom
Nicholson Leslie International  (Reinsurance Brokers) Limited              United Kingdom
Nicholson Leslie International Limited                                     United Kingdom
Nicholson Leslie Investments Limited                                       United Kingdom
Nicholson Leslie Italia S.P.A.                                             Italy
Nicholson Leslie Limited                                                   United Kingdom
Nicholson Leslie Management Services Limited                               United Kingdom
Nicholson Leslie Marine Limited                                            United Kingdom
Nicholson Leslie Nederland Reinsurance brokers cv                          Netherlands
Nicholson Leslie Non-Marine Reinsurance Brokers Limited                    United Kingdom
Nicholson Leslie North American Reinsurance Brokers, Limited               United Kingdom
Nicholson Leslie Property Limited                                          United Kingdom
Nicholson Leslie Special Risks Limited                                     United Kingdom
Nicholson Leslie Special Risks Limited                                     United Kingdom
Nicholson Stewart-Brown Limited                                            United Kingdom
Nissho Iwai (Japan)                                                        Japan
Nixon Constable & Company Ltd.                                             United Kingdom
North Derbyshire Finance Company Limited, The                              United Kingdom
Norwegian Insurance Partners A/S                                           Norway
Norwegian Insurance Partners as (Non-Marine)                               Norway
Nova Reinsurance Brokers, Inc.                                             Illinois

                                     - 25 -
<PAGE>
NRC Reinsurance Company Ltd.                                               Bermuda
NSU Benefit Corporation                                                    Indiana
nv Insurance Louis Delhaize (en abrege INSURDEL)                           Belgium
Oak Brook Holding, Inc.                                                    Delaware
Oak Brook Life Insurance Company                                           Arizona
Ohio Cap Insurance Company, Inc.                                           Unknown
OHM Insurance Agency, Inc.                                                 Ohio
OHM Services of Texas, Inc.                                                Texas
Ohrinsoo Agency                                                            Korea
Olarescu & B. I. Davis Asesores y Corredores de Seguros S.A.               Peru
Old ARS LRA Corp.                                                          Texas
Old-ARS-MGA Corp.                                                          Texas
Olympic Financial Holding Corporation                                      Washington
Olympic Health Management Services, Inc.                                   Washington
Olympic Health Management Systems, Inc.                                    Washington
Orobio Mees Herman B.V.                                                    Netherlands
OUM & Associates of California, A Corporation                              California
OUM & Associates of New York, A Corporation                                New York
OUM & Associates of Ohio, A Corporation                                    Ohio
OWA Hoken (UK) Limited                                                     United Kingdom
OWA Insurance Services (France) SA                                         France
OWA Insurance Services Austria Gesellschaft mbH                            Austria
OWA Insurance Services Austria GmbH & Co. KG                               Austria
P I Insurance Brokers (Pty) Limited                                        South Africa
P.I. Consultants Ltd.                                                      Hong Kong
P.T. Alexander Lippo Indonesia                                             Indonesia
Pacific Wholesale Insurance Brokers Pty Limited                            Australia
Paladin Reinsurance Corporation                                            New York
Pandimar Consultants, Inc.                                                 New York
Paribas Assurantien B.V.                                                   Netherlands
Parker Risk Management (Barbados) Ltd.                                     Barbados
Parker Risk Management (Bermuda) Ltd.                                      Bermuda
Parker Risk Management (Cayman) Ltd.                                       Cayman Islands
Parker Risk Management (Guernsey) Ltd.                                     Guernsey
Parker Risk Management (S) Pte Ltd                                         Singapore
Parker Risk Management, Inc.                                               Colorado
Pat Ryan & Associates, B.V.                                                Netherlands
Paul J.F. Schultz oHG                                                      Germany
PBA Inc.                                                                   Minnesota
PBG Pensions Beratungs-Gesellschaft mbH (Partnership)                      Germany
Pecus                                                                      Brazil
Pernas HHL Insurance Brokers Sdn Bhd                                       Malaysia
Pernas HHL Reinsurance Brokers Sdn. Bhd                                    Malaysia
PHH Insurance Associates Corporation                                       Maryland
Pilots International Association                                           North Dakota
Pinerich Limited                                                           Ireland
Poitras, Lavigueur (1995) Inc.                                             Quebec
Poland Puckle Insurance Brokers Ltd.                                       United Kingdom
Premier Auto Finance, Inc.                                                 Delaware
Premier Auto Finance, L.P.                                                 Illinois
Premier Receivables Purchase Facility, LLC                                 Delaware

                                     - 26 -
<PAGE>
Prescot Insurance Holdings Ltd.                                            United Kingdom
Private Client Trustees Ltd.                                               Ireland
Product Care, Inc.                                                         Illinois
Professional & General Ins. Company (Bermuda) Ltd.                         Bermuda
Professional Liability Services Limited                                    United Kingdom
Professional Sports Insurance Co. Ltd.                                     Bermuda
Progressive Ideal Sdn Bhd.                                                 Malaysia
Promotora Zircon S.A. de C.V.                                              Mexico
Property Owners Database Limited                                           United Kingdom
Proruck Ruckversicherungs - AG                                             Germany
PROVIA Gesselschaft fur betriebliche Risicoanalyse mbH                     Germany
Provider Services, Ltd.                                                    Bermuda
PT RNJ Ratna Nusa Jaya                                                     Indonesia
R&M Reinsurance Intermediaries Ltd.                                        Trinidad
R.E.I. (NSW) Insurance Brokers Pty. Ltd.                                   Australia
R.E.I.A. Insurance Brokers Pty. Ltd.                                       Australia
R.G. Reis (Management Services) Ltd.                                       United Kingdom
R.G. Reis Life Consultants Ltd.                                            United Kingdom
R.G. Reis Pension Fund Trustees Ltd.                                       United Kingdom
Ralph S. Harris (Insurance) Pty. Ltd.                                      Zimbabwe
RAMRO y Asociados, S.C.                                                    Mexico
Rath & Strong, Inc.                                                        Massachusetts
RBH Acquisition Co.                                                        Delaware
RBH General Agencies (Canada) Inc.                                         Quebec
RDG Resource Dealer Group (Canada) Inc.                                    Canada
Reed Stenhouse Asia Pacific Ltd.                                           Scotland
Reed Stenhouse Europe Holdings B.V.                                        Netherlands
Reed Stenhouse Gmbh                                                        Germany
Reed Stenhouse Netherlands B.V.                                            Netherlands
Reed Stenhouse Underwriting Management Ltd.                                Scotland
REISA Insurance Brokers Pty. Ltd.                                          Australia
REIV Insurance Brokers (Pty) Ltd.                                          Australia
Resource Insurance Services, Inc.                                          Indiana
Resource Life Insurance Company                                            Nebraska
Revasa S.p.A.                                                              Italy
RHH Surety & Guarantee Limited                                             United Kingdom
RIP Services Limited                                                       Guernsey
Risk Funding Services (Pty) Limited                                        South Africa
Risk Management Consultants Ltd.                                           United Kingdom
Risk Management Consultants of Canada Limited                              Canada
RiskNet Worldwide, Inc.                                                    Oregon
Risque et Finance SA                                                       France
Rollins Heath (Japan) Ltd.                                                 Japan
Rollins Heath Korea Co. Ltd.                                               Korea
Rollins Hudig Hall & Co. (N.S.W.) Pty. Ltd.                                Australia
Rollins Hudig Hall (Hong Kong) Ltd.                                        Hong Kong
Rollins Hudig Hall (Nederland) Limited                                     United Kingdom
Rollins Hudig Hall (Scandinavia) A/S                                       Norway
Rollins Hudig Hall Associates B.V.                                         Netherlands
Rollins Hudig Hall Finance bv                                              Netherlands
Rollins Hudig Hall Mexico Agente De Seguros Y De Fianzas, S.A. De C.       Mexico

                                     - 27 -
<PAGE>
Rollins Hudig Hall Middle East                                             United Arab Emirates
Rollins Hudig Hall Netherlands b.v.                                        Netherlands
Rollins Hudig Hall of Alaska, Inc.                                         Alaska
Rollins Hudig Hall of the Americas, Inc. Chile Limitada                    Chile
Rollins Hudig Hall Services Limited                                        United Kingdom
Rollins Hudig Hall Sweden AB                                               Sweden
Rollins Hudig Hall Versicherungsmakler Gesellschaft m.b.H                  Austria
Rollins Technical Services Co.                                             Illinois
Ropeco Pty Ltd.                                                            Australia
Rostron Hancock Ltd.                                                       United Kingdom
Roundwise Limited                                                          United Kingdom
Royal Home Protection Plan, Inc.                                           Delaware
Ruben Entertainment Insurance Services                                     United Kingdom
Ryan Insurance Group France S.A.R.L.                                       France
Ryan Insurance Group, Inc.                                                 Delaware
Ryan Warranty Services Canada, Inc.                                        Canada
Ryan Warranty Services Quebec, Inc.                                        Ontario
Ryan/CSI, Inc.                                                             Illinois
Rydata Limited                                                             United Kingdom
S A Credit & Insurance Brokers (Pty) Limited                               South Africa
S W Holdings (SA) (Pty) Limited                                            South Africa
S W Insurance Brokers (Pty) Limited                                        South Africa
S. Hammond Story Agency, Inc.                                              Georgia
S. Mark Brockinton & Associates of Texas, Inc.                             Texas
Saat Van Marwijk Beheer B.V.                                               Netherlands
Saat Van Marwijk Noordwijk B.V.                                            Netherlands
Sang Woon Agency                                                           Korea
Santos da Cunha, Abreu & Associados, Lda.                                  Portugal
SASE France Societe Des Assures Du Sud Set                                 France
Savoy Insurance Brokers Ltd.                                               United Kingdom
Saxonbeech Ltd.                                                            United Kingdom
Scarborough & Company, Inc.                                                Delaware
Sceptre Agency, Inc.                                                       Texas
Schinasi Athesina                                                          Italy
Schinasi Insurance Broker                                                  Italy
Schinasi Veneto                                                            Italy
Scottish & Commonwealth Insurance Co. Ltd.                                 Bermuda
Seascope Cargo Insurance Services Limited                                  United Kingdom
Seascope Insurance Holdings Limited                                        United Kingdom
Seascope Insurance Services Limited                                        United Kingdom
Seascope Marine Insurance Services Limited                                 United Kingdom
Seascope Marine Limited                                                    United Kingdom
Seascope Reinsurance Services Limited                                      United Kingdom
Securities Guarantee Company Limited                                       United Kingdom
Select Direct Limited                                                      Scotland
Self-Insurers Service, Inc.                                                Delaware
Service Protection, Inc.                                                   Illinois
Service Saver, Incorporated                                                Florida
ServicePlan of Florida, Inc.                                               Florida
ServicePlan, Inc.                                                          Illinois
Servicios A.B.S., S.A.                                                     Mexico

                                     - 28 -
<PAGE>
Servicios Inmoboliarios Guadalajara, S.C.                                  Mexico
Servicios Y Garantias Ryan S.L.                                            Spain
Sherwood Insurance Services                                                California
Sherwood Insurance Services of Washington, Inc.                            Washington
SHL Pacific Regional Holdings Inc.                                         California
Shoreline Insurance Agency, Inc.                                           Rhode Island
Simco Insurance Brokers Pte                                                Singapore
Singer Group, Inc., The                                                    Texas
Singer Plan, Inc.                                                          Delaware
SIS Services of New York, Inc.                                             New York
SLE Worldwide Australia Pty Limited                                        Australia
SLE Worldwide Limited                                                      United Kingdom
SLE Worldwide Mexico, Agente de Seguros, S.A. de C.V.                      Mexico
SLE Worldwide, Inc.                                                        Delaware
Societe canadienne de gestion de reassurance, inc                          Quebec
Societe Generale de Courtage d'Assurances                                  France
Sodarcan Inc.                                                              Canada
Sodartec Inc.                                                              Canada
Soriero & Company, Inc.                                                    Texas
Sorim (1987) Ltd.                                                          United Kingdom
Sorim Services (1987) Ltd.                                                 United Kingdom
Southern Cross Underwriting Pty. Limited                                   Australia
Special Risk Services Limited                                              United Kingdom
Special Risk Services, Inc.                                                New Jersey
Spicafab Limited                                                           United Kingdom
Square One, Inc.                                                           Texas
SRA, Inc.                                                                  Texas
SRS General Insurance Services, Inc.                                       California
SRS Insurance Services, Inc.                                               California
Steetley Leslie & Godwin Limited                                           Guernsey
Steeves Lumley Ltd.                                                        Australia
Stenhouse (South East Asia) Pte. Ltd.                                      Singapore
Stenhouse Marketing Services (London) Ltd.                                 United Kingdom
Stenhouse Marketing Services, Inc.                                         Delaware
Stenhouse Reed Shaw Africa (Pty) Ltd.                                      South Africa
Sterling Life Insurance Company                                            Arizona
Stichting Employee Fund Aon                                                Netherlands
Stichting Werknemerscertificaten HLG                                       Netherlands
Structured Compensation Ltd.                                               United Kingdom
Sumner & McMillan                                                          United Kingdom
Sumner & McMillan Limited (Ireland)                                        Ireland
Superannuation Fund (CICNZ) Limited                                        New Zealand
Surety & Guarantee Consultants Limited                                     United Kingdom
Surveyors Claims Services Ltd.                                             United Kingdom
Suys & Janssens                                                            Belgium
Swaziland Construction Insurance Brokers (Pty) Ltd.                        Swaziland
Swaziland Corporate Risk Management (Pty) Ltd.                             Swaziland
Swaziland Employee Benefit Consultants (Pty) Ltd.                          Swaziland
Swaziland Insurance Brokers (Pty) Ltd.                                     Swaziland
Swaziland Reinsurance Brokers (Pty) Ltd.                                   Swaziland
Swett & Crawford                                                           California

                                     - 29 -
<PAGE>
Swett & Crawford Ins. Agency of Massachusetts, Inc.                        Massachusetts
Swett & Crawford of Arizona, Inc.                                          Arizona
Swett & Crawford of Colorado, Inc.                                         Colorado
Swett & Crawford of Connecticut, Inc.                                      Connecticut
Swett & Crawford of Hawaii, Inc.                                           Hawaii
Swett & Crawford of Idaho, Inc.                                            Idaho
Swett & Crawford of Maine, Inc.                                            Maine
Swett & Crawford of Nevada, Inc.                                           Nevada
Swett & Crawford of Pennsylvania, Inc.                                     Pennsylvania
Swett & Crawford of Texas, Inc.                                            Texas
Swett Insurance Managers of California, Inc.                               California
Swett Insurance Managers of Pennsylvania, Inc.                             Pennsylvania
T M Insurance Brokers (Pty) Limited                                        South Africa
Tabma-Hall Insurance Services Pty. Limited                                 Australia
Tethercrest Ltd.                                                           United Kingdom
Texas Star Insurance Agency                                                Not Applicable
Texecur Versicherungs Vermittlungs GmbH                                    Germany
The Alexander Consulting Group Ltd.                                        Canada
The Alexander Consulting Group Ltd.                                        New Zealand
The Alexander Consulting Group Ltd.                                        Scotland
The Alliance Group, LLC                                                    Colorado
The Credit Insurance Association France SA                                 France
The Credit Insurance Association Ltd.                                      United Kingdom
The Entertainment Coalition                                                Not Applicable
The National Senior Membership Group Association                           Washington
The Olympic Senior Membership Group, Inc.                                  Washington
The Swett & Crawford Group, Inc.                                           California
Tholwana MIB Pty Limited                                                   South Africa
Trans Caribbean Insurance Services, Inc.                                   American Samoa
Travellers Club International Ltd.                                         United Kingdom
Trent Insurance Company Ltd.                                               Bermuda
TREV Properties Corporation                                                Delaware
TTF Insurance Services Ltd.                                                United Kingdom
U.S. Rating Bureau, Inc.                                                   Delaware
Underwriters Marine Services Limited                                       United Kingdom
Underwriters Marine Services of Texas, Inc.                                Texas
Underwriters Marine Services, Inc.                                         Louisiana
Union Centurion, S.A.de C.V.                                               Mexico
Unison Consultants Europe E.E.I.G                                          Belgium
Unison GEIE                                                                Belgium
Unison SA                                                                  Belgium
Unison Technical Services                                                  Belgium
United Car & Van Rental Ltd.                                               United Kingdom
United Iranian Insurance Services plc Tehran                               Iran
Uzbeksugurta Howden Lihou                                                  Republic of Uzbekistan
Valex Insurance Agency, Inc.                                               Texas
Varity Risk Management Services Ltd.                                       United Kingdom
Vassal Properties (Pty) Ltd.                                               Botswana
VECCI Insurance Services Ltd.                                              Australia
Verband der Jauch & Hubener Unterstutzungskassen                           Germany
Vesselforward Ltd.                                                         United Kingdom

                                     - 30 -
<PAGE>
Virginia Surety Company, Inc.                                              Illinois
Virginia Surety Company, Inc.                                              New Zealand
VOL Mortgage Corporation                                                   Delaware
VOL Properties Corporation                                                 Delaware
Wackerbarth H. Limited                                                     United Kingdom
Wackerbarth Hardman (Holdings) Limited                                     United Kingdom
Wackerbarth International Holdings Bv                                      Netherlands
WACUS Kreditversicherungsmakler GmbH                                       Austria
WACUS Magyarorszag Hitelbitzositasi Tanacsado es Kozvetito Kft.            Hungary
WAS Betriebsfuhrungs-GmbH                                                  Germany
WAVECA CA                                                                  Venezuela
Wexford Underwriting Managers, Inc.                                        Delaware
Whitehouse Moorman Holdings Ltd.                                           United Kingdom
Wilfredo Armstrong S.A.                                                    Argentina
William Gallagher Associates of California, Inc.                           California
William Gallagher Associates of Maryland, Inc.                             Maryland
William Gallagher Associates of New Jersey, Inc.                           New Jersey
Willis Corroon (PVT) Ltd.                                                  Zimbabwe
Winchester Financial Services (Pty) Limited                                South Africa
Windhock Insurance Brokers (Pty) Limited                                   Namibia
WMD Underwriting Agencies Ltd.                                             United Kingdom
World Insurance Network Ltd.                                               Cardiff
Worldwide Insurance Network Limited                                        United Kingdom
Worldwide Integrated Services Company                                      Texas
Wyrm Systems Pty Limited                                                   South Africa
XB-Lumley Insurance Brokers (Pty) Ltd.                                     South Africa
Y&D Properties Ltd.                                                        Canada
ZAO Aon Insurance Brokers                                                  Russia
Zimbabwe Risk Managers (Pvt) Ltd.                                          Zimbabwe
</TABLE>

                                     - 31 -
<PAGE>

                                                                      Exhibit 23




              CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



We consent to the  incorporation  by reference in this Annual Report (Form 10-K)
of Aon  Corporation of our report dated  February 9, 1999,  included in the 1998
Annual Report to Stockholders of Aon Corporation.

Our audits also included the financial  statement  schedules of Aon  Corporation
listed in Item 14(a).  These schedules are the  responsibility  of the Company's
management.  Our responsibility is to express an opinion based on our audits. In
our opinion, with respect to which the date is February 9, 1999 (except for Note
5 to  Schedule  I, as to which  the  date is  March  19,  1999),  the  financial
statement  schedules referred to above, when considered in relation to the basic
financial  statements taken as a whole,  present fairly in all material respects
the information set forth therein.

We also consent to the incorporation by reference in the Registration Statements
pertaining to the employer's  savings,  stock option,  stock award, and employee
stock purchase plans (Form S-8 Nos. 33-27984, 33-42575, 33-59037 and 333-55773),
the offer to exchange Capital Securities (Form S-4 No. 333-21237) of Aon Capital
A, and the  registration  of  369,000  shares  of  common  stock  (Form  S-3 No.
333-50607)  of  our  report  dated  February  9,  1999,   with  respect  to  the
consolidated  financial  statements  incorporated  herein by reference,  and our
report,  included  in the  preceding  paragraph  with  respect to the  financial
statement   schedules  included  in  this  Annual  Report  (Form  10-K)  of  Aon
Corporation.


                                     /s/ ERNST & YOUNG LLP


Chicago, Illinois
March 24, 1999

<TABLE> <S> <C>
                             
<ARTICLE>                          5
<LEGEND>                     
     This  schedule  contains  summary  financial   information  extracted  from
     Consolidated  Statements of Financial Position and  Consolidated Statements
     of  Income and is qualified in its entirety  by reference to such financial
     statements.
</LEGEND>                    
<MULTIPLIER>                      1,000,000
<CURRENCY>                         USD
                                   
<S>                                <C>
<PERIOD-TYPE>                      12-MOS
<FISCAL-YEAR-END>                  DEC-31-1998
<PERIOD-START>                     JAN-01-1998
<PERIOD-END>                       DEC-31-1998
<EXCHANGE-RATE>                            1.0
<CASH>                                   2,944 <F1>
<SECURITIES>                             3,871 <F2>
<RECEIVABLES>                            6,705
<ALLOWANCES>                                99
<INVENTORY>                                  0
<CURRENT-ASSETS>                             0 <F3>
<PP&E>                                   1,406
<DEPRECIATION>                             732
<TOTAL-ASSETS>                          19,688
<CURRENT-LIABILITIES>                        0 <F3>
<BONDS>                                    580 <F4>
                      850 <F5>
                                  0
<COMMON>                                   172
<OTHER-SE>                               2,845
<TOTAL-LIABILITY-AND-EQUITY>            19,688
<SALES>                                      0
<TOTAL-REVENUES>                         6,493
<CGS>                                        0
<TOTAL-COSTS>                                0
<OTHER-EXPENSES>                         5,562 <F6>
<LOSS-PROVISION>                             0
<INTEREST-EXPENSE>                          87
<INCOME-PRETAX>                            931
<INCOME-TAX>                               349
<INCOME-CONTINUING>                        582
<DISCONTINUED>                               0
<EXTRAORDINARY>                              0
<CHANGES>                                    0
<NET-INCOME>                               541
<EPS-PRIMARY>                             3.16
<EPS-DILUTED>                             3.11
        
<FN>
<F1>  Includes short-term investments.
<F2>  Includes fixed maturities and equity securities at fair value.
<F3>  Not applicable based on current reporting format.
<F4>  Represents notes payable.
<F5>  Redeemable  preferred  stock.  Includes  Company-obligated  Mandatorily
      Redeemable  Preferred  Capital  Securities  of Subsidiary Trust Holding
      Solely the Company's Junior Subordinated Debentures.
<F6>  Represents total expenses.
</FN>

</TABLE>


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