-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, RWtLlnIAE29sG8wlQah1gs5owN5+2L3p3XdopuVmxifLFoo7isFpNhgs2XbguOQi CFLX1YZSt0PGjCp/k9VQgA== 0001047469-03-008218.txt : 20030310 0001047469-03-008218.hdr.sgml : 20030310 20030310160600 ACCESSION NUMBER: 0001047469-03-008218 CONFORMED SUBMISSION TYPE: S-4 PUBLIC DOCUMENT COUNT: 12 FILED AS OF DATE: 20030310 FILER: COMPANY DATA: COMPANY CONFORMED NAME: AON CORP CENTRAL INDEX KEY: 0000315293 STANDARD INDUSTRIAL CLASSIFICATION: ACCIDENT & HEALTH INSURANCE [6321] IRS NUMBER: 363051915 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: S-4 SEC ACT: 1933 Act SEC FILE NUMBER: 333-103704 FILM NUMBER: 03598070 BUSINESS ADDRESS: STREET 1: 123 N WACKER DR CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3127013000 FORMER COMPANY: FORMER CONFORMED NAME: COMBINED INTERNATIONAL CORP DATE OF NAME CHANGE: 19870504 S-4 1 a2101105zs-4.htm S-4
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As filed with the Securities and Exchange Commission on March 10, 2003

Registration No. 333-

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM S-4
Registration Statement under the Securities Act of 1933

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

Delaware
(State or Other Jurisdiction
of Incorporation or Organization)

6321
(Primary Standard Industrial
Classification Code Number)

36-3051915
(I.R.S. Employer
Identification Number)

200 East Randolph Street
Chicago, Illinois 60601
(312) 381-1000
(Address, including zip code, and telephone number,
including area code, of Registrant's principal executive offices)

Raymond I. Skilling
Executive Vice President and Chief Counsel
Aon Corporation
200 East Randolph Street
Chicago, Illinois 60601
(312) 381-1000
(Name, address, including zip code, and telephone number,
including area code, of agent for service)

Copy of communications to:
Paul L. Choi
Frederick C. Lowinger
Sidley Austin Brown & Wood
Bank One Plaza
10 South Dearborn Street
Chicago, Illinois 60603
(312) 853-7000

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this Registration Statement.

If the securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. o

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. o

CALCULATION OF REGISTRATION FEE

Title Of Each Class Of Securities To Be Registered	Amount To Be Registered	Proposed Maximum Offering Price Per Unit(1)	Proposed Maximum Aggregate Offering Price(1)	Amount Of Registration Fee


7.375% Senior Notes due 2012	$225,000,000	100%	$225,000,000	$18,203

(1): Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended.

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. We may not exchange these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to exchange these securities and it is not soliciting an offer to exchange these securities in any state where the offer or exchange is not permitted.

Subject To Completion, Dated March 10, 2003

PROSPECTUS

Aon Corporation

Offer to Exchange Up to $225,000,000 Aggregate Principal Amount of
Our 7.375% Senior Notes due 2012 for Any and All of the $225,000,000 Aggregate
Principal Amount of Our Outstanding 7.375% Senior Notes due 2012

The registered exchange offer will expire at 5:00 p.m., New York City time,
on , 2003, unless extended.

We are offering to exchange up to $225,000,000 aggregate principal amount of our 7.375% senior notes due 2012 (which we refer to as the exchange notes) for $225,000,000 aggregate principal amount of our outstanding 7.375% senior notes due 2012 (which we refer to as the original notes). We sometimes refer to the exchange notes and the original notes collectively as the notes.

The terms of the exchange notes are substantially identical in all respects (including principal amount, interest rate and maturity) to the terms of the original notes for which they may be exchanged pursuant to this exchange offer, except that the exchange notes will be freely transferable by the holders (other than as described in this prospectus), are issued free of any covenant restricting transfer absent registration and will not have the right to earn additional interest in the event of a failure to register the exchange notes. The exchange notes will evidence the same debt as the original notes. Original notes that are accepted for exchange will be canceled and retired. For a description of the terms of the notes, see "Description of the Notes." Aon Corporation will not receive any cash proceeds from this exchange offer.

Interest on the exchange notes will accrue at a rate per annum of 7.375% from the most recent date to which interest has been paid on the original notes or, if no interest has been paid on the original notes, December 16, 2002 and will be payable semiannually in arrears on June 14 and December 14 of each year, beginning June 14, 2003. Holders whose original notes are accepted for exchange will not receive any payment in respect of interest on the original notes for which the record date occurs on or after completion of the exchange offer. See "The Exchange Offer—Terms of the Exchange Offer."

The original notes were sold on December 16, 2002 in a transaction that was not registered under the Securities Act of 1933. Accordingly, the original notes may not be offered or sold except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act and all other applicable securities laws. We are offering the exchange notes to satisfy our obligations under the registration rights agreement relating to the original notes. See "The Exchange Offer—Purposes and Effects of the Exchange Offer."

Each broker-dealer that receives exchange notes for its own account pursuant to the exchange offer must acknowledge that it will deliver a prospectus in connection with any resale of the exchange notes. The letter of transmittal states that by so acknowledging and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with any resales of exchange notes received in exchange for original notes where the original notes were acquired by the broker-dealer as a result of market-making activities or other trading activities. We have agreed that, for a period of 180 days after the expiration date (as defined in this prospectus), we will make this prospectus available to any broker-dealer for use in connection with any such resale. See "Plan of Distribution."

The notes are not listed and will not be listed on any national securities exchange.

Participating in the exchange offer involves risks. See "Risk Factors" beginning on page 9.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined that this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is , 2003.

TABLE OF CONTENTS

		Page
Summary		3
Risk Factors		9
Special Note on Forward-Looking Statements		19
Use of Proceeds		19
Ratios of Earnings to Fixed Charges		19
The Exchange Offer		20
Description of the Notes		29
Exchange Offer and Registration Rights		38
Certain United States Federal Income Tax Considerations		39
ERISA Considerations		40
Plan of Distribution		41
Legal Matters		42
Experts		42
Where You Can Find More Information		43

This prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, any notes offered hereby in any jurisdiction where, or to any person to whom, it is unlawful to make such offer or solicitation. The information contained in this prospectus speaks only as of the date of this prospectus unless the information specifically indicates that another date applies. No dealer, salesperson or other person has been authorized to give any information or to make any representations other than those contained or incorporated by reference in this prospectus in connection with the offer contained herein and, if given or made, such information or representations must not be relied upon as having been authorized by Aon Corporation. Neither the delivery of this prospectus nor any sale made hereunder shall under any circumstances create an implication that there has been no change in our affairs or that of our subsidiaries since the date hereof.

This prospectus incorporates by reference important business, financial and other information about Aon Corporation that is not included in or delivered with this prospectus. See "Where You Can Find More Information" on page 43 for a list of the documents that have been incorporated by reference in this prospectus. Requests for these documents may be directed to Aon Corporation at 200 East Randolph Street, Chicago, Illinois 60601, Attn: Corporate Secretary, telephone number (312) 381-1000.

If you would like to request copies of these documents, please do so by , 2003 in order to receive them before the expiration of the exchange offer. In the event the exchange offer is extended, you must submit your request at least five business days before the expiration date, as extended.

SUMMARY

This summary highlights selected information about Aon Corporation and the exchange offer. You should read carefully this entire prospectus together with the documents incorporated by reference herein. Unless otherwise indicated, all references in this prospectus to "Aon," "we," "our," or "us" refer to Aon Corporation together with its subsidiaries.

Overview of Aon Corporation

We are a holding company whose operating subsidiaries carry on business in three distinct operating segments: (i) insurance brokerage and other services; (ii) consulting; and (iii) insurance underwriting.

Our insurance brokerage and other services segment consists principally of retail, reinsurance and wholesale brokerage, as well as related insurance services, including claims services, underwriting management, captive insurance company management services and premium financing. These services are provided by subsidiaries of Aon Group, Inc. and certain of our other indirect subsidiaries, including: Aon Risk Services Companies, Inc.; Aon Holdings International bv; Aon Services Group, Inc.; Aon Re Worldwide, Inc.; Aon Limited (U.K.); Cananwill, Inc.; and Premier Auto Finance, Inc.

Our consulting segment provides a full range of human capital management services utilizing five practices: employee benefits, compensation, management consulting, outsourcing and communications. These services are provided primarily by subsidiaries and affiliates of Aon Consulting Worldwide, Inc., which is also a subsidiary of Aon Group.

Our insurance underwriting segment is comprised of supplemental accident and health and life insurance and extended warranty and casualty insurance products and services. Combined Insurance Company of America engages in the marketing and underwriting of accident and health and life insurance products. Our subsidiaries, Combined Specialty Insurance Company (formerly known as Virginia Surety Company, Inc.) and London General Insurance Company Limited, offer extended warranty and casualty insurance products and services.

We have 550 offices in over 125 countries and nearly 53,000 professionals and employees who serve millions of clients, policyholders and warrantyholders.

The mailing address of our principal executive offices is 200 East Randolph Street, Chicago, Illinois 60601, and the telephone number of our principal executive offices is (312) 381-1000.

The Exchange Offer

Purpose of Exchange		We sold the original notes in a private offering to qualified institutional buyers through Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc. (the "initial purchasers"). In connection with that offering, we and the initial purchasers entered into a registration rights agreement dated as of December 16, 2002 (the "registration rights agreement") for the benefit of the holders of the original notes providing for, among other things, the exchange offer. The exchange offer is intended to make the exchange notes freely transferable by the holders without further registration or any prospectus delivery requirements under the Securities Act. See "The Exchange Offer—Purposes and Effects of the Exchange Offer."
The Exchange Offer		We are offering to exchange, pursuant to the exchange offer, up to $225 million aggregate principal amount of our new 7.375% senior notes due 2012 (the "exchange notes") for $225 million aggregate principal amount of our outstanding 7.375% senior notes due 2012 (the "original notes"). We sometimes refer to the exchange notes and the original notes collectively as the notes. The terms of the exchange notes and original notes are identical in all material respects (including principal amount, interest rate and maturity), except that the exchange notes are freely transferable by the holders and are not subject to any covenant regarding registration under the Securities Act. See "The Exchange Offer—Terms of the Exchange Offer" and "—Procedures for Tendering." The exchange offer is not conditioned upon any minimum aggregate principal amount of original notes being tendered for exchange.
Expiration Date		The exchange offer will expire at 5:00 p.m., New York City time, on , 2003, unless extended (the "expiration date").
Conditions of the Exchange Offer		Our obligation to consummate the exchange offer is not subject to any conditions, other than that the exchange offer does not violate any applicable law or SEC staff interpretation. See "The Exchange Offer—Conditions of the Exchange Offer." We reserve the right to terminate or amend the exchange offer at any time prior to the expiration date if, among other things, there shall have been proposed, adopted or enacted any law, statute, rule, regulation or SEC staff interpretation which, in our judgment, could reasonably be expected to materially impair our ability to proceed with the exchange offer.

Procedures for Tendering Original Notes	Brokers, dealers, commercial banks, trust companies and other nominees who hold original notes through The Depository Trust Company ("DTC") may effect tenders by book-entry transfer in accordance with DTC's Automated Tender Offer Program ("ATOP"). To tender original notes for exchange by book-entry transfer, an agent's message (as defined under "The Exchange Offer—Procedures for Tendering") or a completed and signed letter of transmittal (or facsimile thereof), with any required signature guarantees and any other required documentation, must be delivered to the exchange agent at the address set forth in this prospectus on or prior to the expiration date, and the original notes must be tendered in accordance with DTC's ATOP procedures for transfer. To tender original notes for exchange by means other than book-entry transfer, you must complete, sign and date the letter of transmittal (or facsimile thereof) in accordance with the instructions in this prospectus and contained in the letter of transmittal and mail or otherwise deliver the letter of transmittal (or facsimile thereof), together with the original notes, any required signature guarantees and any other required documentation, to the exchange agent at the address set forth in this prospectus on or prior to the expiration date. By executing the letter of transmittal, you represent to us that:
	•	you are acquiring the exchange notes in the ordinary course of business;
	•	you are not engaged in, and do not intend to engage in, and have no arrangement or understanding with any person to participate in, the distribution of the original notes or the exchange notes within the meaning of the Securities Act; and
	•	you are not an "affiliate" of Aon (as defined under the Securities Act) or, if you are an affiliate, that you will comply with the registration and prospectus delivery requirements of the Securities Act to the extent applicable.
	In addition, each broker or dealer that receives exchange notes for its own account in exchange for any original notes that were acquired by the broker or dealer as a result of market-making activities or other trading activities must acknowledge that it will deliver a prospectus in connection with any resale of the exchange notes. See "The Exchange Offer—Procedures for Tendering" and "Plan of Distribution."

Special Procedures for Beneficial Owners		If you are a beneficial owner whose original notes are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and you wish to tender, you should contact the registered holder promptly and instruct the registered holder to tender on your behalf. If the original notes are in certificated form and you are a beneficial owner who wishes to tender on the registered holder's behalf, prior to completing and executing the letter of transmittal and delivering the original notes, you must either make appropriate arrangements to register ownership of the original notes in your name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time. See "The Exchange Offer—Procedures for Tendering."
Guaranteed Delivery Procedures		If you wish to tender your original notes in the exchange offer but your original notes are not immediately available for delivery or other documentation cannot be completed by the expiration date, or the procedures for book-entry transfer cannot be completed on a timely basis, you may still tender your original notes by completing, signing and delivering the letter of transmittal or, in the case of a book-entry transfer, an agent's message, with any required signature guarantees and any other documents required by the letter of transmittal, to the exchange agent prior to the expiration date and tendering your original notes according to the guaranteed delivery procedures set forth in "The Exchange Offer—Guaranteed Delivery Procedures."
Withdrawal Rights		You may withdraw your tender of original notes at any time prior to 5:00 p.m., New York City time, on the expiration date. See "The Exchange Offer—Withdrawal of Tenders."
Acceptance of Original Notes and Delivery of Exchange Notes		We will accept for exchange any and all original notes that are properly tendered to the exchange agent prior to 5:00 p.m., New York City time, on the expiration date. The exchange notes issued pursuant to the exchange offer will be delivered promptly following the expiration date. See "The Exchange Offer—Terms of the Exchange Offer."
Exchange Agent		The Bank of New York is serving as the exchange agent in connection with the exchange offer. See "The Exchange Offer—Exchange Agent."
Tax Consequences		For a summary of certain U.S. federal income tax consequences of ownership of the notes, the exchange of original notes for exchange notes and the disposition of notes, see "Certain United States Federal Income Tax Considerations."

Effect on Holders of the Original Notes		As a result of making this exchange offer, and upon acceptance for exchange of all validly tendered original notes pursuant to the terms thereof, we will have fulfilled some of our obligations under the registration rights agreement, and, accordingly, there will be no increase in the interest rate on the original notes pursuant to the registration rights agreement. Holders of original notes who do not tender their original notes will continue to be entitled to all of the rights and limitations applicable thereto under the indenture dated as of December 16, 2002 (the "indenture") between us and The Bank of New York, as trustee (the "trustee"), relating to the notes, except for any rights under the indenture or the registration rights agreement which by their terms terminate or cease to be effective as a result of our making and accepting for exchange all validly tendered original notes pursuant to the exchange offer (including the right to receive additional interest as described above). All original notes that remain outstanding will continue to be subject to the restrictions on transfer provided for in the original notes and the indenture. To the extent that original notes are tendered and accepted in the exchange offer, the trading market, if any, for original notes could be adversely affected.
Use of Proceeds		We will not receive any cash proceeds from the issuance of exchange notes pursuant to the exchange offer. We used the approximately $223 million net proceeds from the sale of the original notes to extend our debt maturities, to retire a portion of other indebtedness and preferred capital securities and for other general corporate purposes. See "Use of Proceeds."

Terms of the Notes

The exchange offer applies to the entire $225 million aggregate principal amount of original notes that are outstanding. The terms of the original notes and exchange notes are identical in all material respects, except for certain transfer restrictions and registration and other rights relating to the exchange of the original notes for exchange notes. The exchange notes will evidence the same debt as the original notes and will be governed by the same indenture under which the original notes were issued. See "Description of the Notes."

Securities offered		$225,000,000 aggregate principal amount of 7.375% senior notes due 2012.
Issuer		Aon Corporation, a Delaware corporation.
Maturity Date		December 14, 2012.
Interest Payment Dates		June 14 and December 14 of each year, beginning June 14, 2003.
Sinking Fund		None.
Ranking		The original notes are, and the exchange notes will be, our unsecured and unsubordinated obligations and will rank equally with all of our existing and future senior unsecured debt.
Covenants		The indenture contains a covenant limiting our ability to create liens on the present or future common stock of any of our significant subsidiaries.
Transfer Restrictions		The original notes have not been registered under the Securities Act and are subject to restrictions on transfer. The exchange notes have been registered under the Securities Act and are not subject to those restrictions.
Exchange Offer; Registration Rights		In the registration rights agreement, we agreed to file with the SEC one or more registration statements with respect to an offer to exchange the original notes for substantially similar notes that are registered under the Securities Act. Alternatively, if the exchange offer cannot be completed, we may file one or more registration statements to cover resales of the original notes. If we do not comply with these obligations, we will be required to pay liquidated damages to the holders of the original notes in the form of higher interest rates, but this provision does not apply to the exchange notes. This offering of exchange notes is being made to satisfy our obligations under the registration rights agreement. See "Exchange Offer and Registration Rights."
No Public Market		The original notes are, and the exchange notes will be, a new issue of securities and will not be listed on any securities exchange or included in any automated quotation system. The initial purchasers have advised us that they intend to make a market in the original notes and, if issued, the exchange notes, but they are not obligated to do so and may discontinue their market-making activities at any time without notice.

RISK FACTORS

An investment in the notes involves risks. You should consider carefully the information set forth in this section and all the other information provided to you or incorporated by reference in this prospectus before deciding whether to exchange your original notes for exchange notes.

Risks Related to Our Business and the Insurance Industry

Our results may fluctuate as a result of many factors, including cyclical changes in the insurance and reinsurance industries.

Our results historically have been subject to significant fluctuations arising from uncertainties in the insurance industry. Changes in premium rates affect not only the potential profitability of our underwriting businesses but also generally affect the commissions and fees payable to our brokerage businesses. In addition, insurance industry developments that can significantly affect our financial performance include factors such as:

•: rising levels of actual costs that are not known by companies at the time they price their products;
•: volatile and unpredictable developments, including weather-related and other natural and man-made catastrophes, including acts of terrorism;
•: changes in levels of capacity and demand, including reinsurance capacity; and
•: changes in reserves resulting from the general claims and legal environments as different types of claims arise and judicial interpretations relating to the scope of insurers' liabilities develop.

A further decline in the credit ratings of our senior debt and commercial paper may adversely affect our borrowing costs and financial flexibility.

On several occasions in recent months, the credit rating agencies have lowered the credit ratings of our senior debt and commercial paper. Most recently, on October 31, 2002, Moody's Investors Service lowered its rating of our senior debt to the current rating of "Baa2" from "Baa1." Moody's also placed the rating of our senior debt and the "P-2" rating of our commercial paper under review for possible future downgrade, which it subsequently removed without change. On October 31, 2002, Standard & Poor's Ratings Services placed its "A-" rating of our senior debt on CreditWatch with negative implications, which it subsequently removed without change. As a result of the actions taken by the rating agencies on October 31, 2002, we have been required, in lieu of our existing guarantees, to fund an aggregate of approximately $43 million with respect to our automobile finance securitizations. A further downgrade in the credit ratings of our senior debt and commercial paper will increase our borrowing costs and reduce our financial flexibility.

Any such further downgrade may trigger a further obligation of our company to fund an aggregate of up to $265 million with respect to our premium finance and automobile finance securitizations. We no longer securitize automobile finance amounts, and, as a result, we expect this amount will decline over time as the outstanding automobile finance securitizations run down. Moreover, some of our debt instruments, such as our 6.20% notes due January 2007 ($250 million of which are outstanding), expressly provide for interest rate increases in the case of certain ratings downgrades. Similarly, any such downgrade would increase our commercial paper interest rates or may result in our inability to access the commercial paper market altogether. If we cannot access the commercial paper market, although we have committed backup lines in excess of our currently outstanding commercial paper borrowings, we cannot assure you that it would not adversely affect our financial position. A downgrade in the credit ratings of our senior debt may also adversely affect the claims-paying ability or financial strength ratings of our insurance company subsidiaries. See "A decline in the financial strength or

claims-paying ability ratings of our insurance underwriting subsidiaries may increase policy cancellations and negatively impact new sales of insurance products" below.

We face significant competitive pressures in each of our businesses.

We believe that competition in our lines of business is based on service, product features, price, commission structure, financial strength, claims paying ability ratings and name recognition. In particular, we compete with a large number of national, regional and local insurance companies and other financial services providers, brokers and, with respect to our extended warranty business, third-party administrators, manufacturers and distributors.

Some of our underwriting competitors have penetrated more markets and offer a more extensive portfolio of products and services and have more competitive pricing than we do, which can adversely affect our ability to compete for business. Some underwriters also have higher claims paying ability ratings and greater financial resources with which to compete and are subject to less government regulation than our underwriting operations.

We encounter strong competition for both business and professional talent in our insurance brokerage and risk management services operations from other insurance brokerage firms which also operate on a nationwide or worldwide basis, from a large number of regional and local firms in the United States, the European Union and in other countries and regions, from insurance and reinsurance companies that market and service their insurance products without the assistance of brokers or agents and from other businesses, including commercial and investment banks, accounting firms and consultants that provide risk-related services and products. Our consulting operations compete with independent consulting firms and consulting organizations affiliated with accounting, information systems, technology and financial services firms around the world.

In addition, the increase in competition due to new legislative or industry developments could adversely affect us. These developments include:

•: an increase in capital-raising by insurance underwriting companies, which could result in new entrants to our markets and an influx of capital into the industry;
•: the selling of insurance by insurance companies directly to insureds;
•: the enactment of the Gramm-Leach-Bliley Act of 1999, which, among other things, permits financial institutions, such as banks and savings and loans, to sell insurance products, and also could result in new entrants to our markets;
•: the establishment of programs in which state-sponsored entities provide property insurance in catastrophe prone areas or other alternative markets types of coverage; and
•: changes in consumer buying practices caused by the Internet.

New competition as a result of these developments could cause the supply of and demand for our products and services to change, which could adversely affect our results of operations and financial condition.

A decline in the financial strength or claims-paying ability ratings of our insurance underwriting subsidiaries may increase policy cancellations and negatively impact new sales of insurance products.

Financial strength and claims-paying ability ratings have become increasingly important factors in establishing the competitive position of insurance companies. These ratings are based upon criteria established by the rating agencies for the purpose of rendering an opinion as to an insurance company's financial strength, operating performance, strategic position and ability to meet its obligations to policyholders. They are not evaluations directed toward the protection of investors, nor are they recommendations to buy, sell or hold specific securities. Periodically, the rating agencies

evaluate our insurance underwriting subsidiaries to confirm that they continue to meet the criteria of the ratings previously assigned to them. A downgrade, or the potential for a downgrade, of these ratings could, among other things, increase the number of policy cancellations, adversely affect relationships with brokers, retailers and other distributors of their products and services, negatively impact new sales and adversely affect their ability to compete.

Combined Specialty Insurance Company (formerly Virginia Surety Company, Inc.), our principal property and casualty insurance company subsidiary, is currently rated "A" (excellent; third highest of 16 rating levels) by A.M. Best Company. Combined Insurance Company of America, the principal insurance subsidiary that underwrites our specialty accident and health insurance business, is currently rated "A" (excellent; third highest of 16 rating levels) by A.M. Best Company, "BBB+" (good; fourth highest of nine rating levels and highest ranking within the level) for financial strength by Standard and Poor's Ratings Services and "Baa1" (adequate; fourth highest of nine rating levels and highest ranking within the level) for financial strength by Moody's Investors Service. We cannot assure you that one or more of the rating agencies will not downgrade or withdraw their financial strength or claims-paying ability ratings in the future.

Changes in interest rates and investment prices could reduce the value of our investment portfolio and adversely affect our financial condition or results.

Our insurance underwriting subsidiaries carry a substantial investment portfolio of fixed-maturity and equity and other long-term investments. As of December 31, 2002, our fixed-maturity investments (94% of which were investment grade) had a carrying value of $2.1 billion, our equity investments had a carrying value of $62 million and our other long-term investments and limited partnerships had a carrying value of $600 million. Accordingly, changes in interest rates and investment prices could reduce the value of our investment portfolio and adversely affect our financial condition or results.

For example, changes in domestic and international interest rates directly affect our income from, and the market value of, fixed-maturity investments. Similarly, general economic conditions, stock market conditions and other factors beyond our control affect the value of our equity investments. We monitor our portfolio for "other than temporary impairments" in carrying value. For securities judged to have an "other than temporary impairment," we recognize a realized loss through the statement of income to write down the value of those securities.

For 2002, we recognized impairment losses of $130 million, which includes $51 million to reflect other than temporary impairments existing with respect to prior years. We cannot assure you that we will not have to recognize additional impairment losses in the future, which would negatively affect our financial results.

On December 31, 2001, our two major insurance companies sold the vast majority of their limited partnership portfolio, valued at $450 million, to Private Equity Partnership Structures I, LLC, a qualifying special purpose entity. We utilized this qualifying special purpose entity following the guidance contained in Financial Accounting Standards Board Statement No. 140 (Statement No. 140) and other relevant accounting guidance. The common stock interest in Private Equity Partnership Structures I is held by a limited liability company which is owned by one of our subsidiaries (49%) and by a charitable trust, which is not controlled by us, established for victims of the September 11 attacks (51%). Approximately $171 million of investment grade fixed-maturity securities were sold by Private Equity Partnership Structures I to unaffiliated third parties. Private Equity Partnership Structures I then paid our insurance underwriting companies the $171 million in cash and issued to them an additional $279 million in fixed-maturity and preferred stock securities. The fixed-maturity securities our insurance underwriting companies received from Private Equity Partnership Structures I are rated as investment grade by Standard & Poor's Ratings Services. As part of this transaction, our insurance underwriting companies are required to purchase from Private Equity Partnership Structures I additional fixed-

maturity securities in an amount equal to the unfunded limited partnership commitments, as they are requested. As of December 31, 2002, these unfunded commitments amount to $100 million. Based on the actions taken by the ratings agencies on October 31, 2002, credit support arrangements were purchased on January 27, 2003. If our insurance underwriting companies fail to purchase additional fixed-maturity securities as commitments are drawn down, we have guaranteed their purchase.

Although the Private Equity Partnership Structures I transaction is expected to reduce the reported earnings volatility historically associated with directly owning limited partnership investments, it will not eliminate our risk of future losses. For instance, we must analyze our preferred stock and fixed-maturity interests in Private Equity Partnership Structures I for other than temporary impairment, based on the valuation of the limited partnership interests held by Private Equity Partnership Structures I and recognize an impairment loss if necessary. We cannot assure you that we will not have to recognize impairment losses with respect to our Private Equity Partnership Structures I interests in the future.

Our pension liabilities may continue to grow, which could adversely affect our stockholders' equity or require us to make additional cash contributions to the pension plans.

To the extent that the present value of the benefits incurred to date for pension obligations in the major countries in which we operate continue to exceed the market value of the assets supporting these obligations, our financial position and results of operations may be adversely affected. Primarily as a result of the decline in the equity markets, some of our defined benefit pension plans, particularly in the United Kingdom, have suffered significant valuation losses in the assets backing the related pension obligation. On February 12, 2003, we announced that we incurred an after-tax increase to the minimum pension liability and a commensurate reduction in 2002 year-end stockholders' equity of $552 million. Current projections indicate that our 2003 pension expense would increase by approximately $130 million compared with 2002 and incremental cash contributions of approximately $40 million would be required in 2003. These estimates are based on certain assumptions, including discount rates, interest rates, fair value of assets for some of our plans and expected return on plan assets. Changes in our pension benefit obligations and the related net periodic costs or credits may occur in the future due to any variance of actual results from our assumptions and changes in the number of participating employees. As a result, there can be no assurance that we will not experience future decreases in stockholders' equity or that we will not be required to make additional cash contributions in the future beyond those which have been announced.

We are subject to a number of contingencies and legal proceedings which, if determined adversely to us, would adversely affect our financial results.

We 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. The litigation naming us as a defendant ordinarily involves our activities as a broker or provider of insurance products or as an employer. It is possible that, if the outcomes of these contingencies and legal proceedings were not favorable to us, it could materially adversely affect our future financial results. In addition, our results of operations, financial condition or liquidity may be adversely affected if in the future our insurance coverage proves to be inadequate or unavailable or there is an increase in liabilities for which we self-insure.

Our success depends, in part, on the efforts of our senior management and our ability to attract and retain experienced and qualified personnel.

We believe that our continued success depends, in part, on the efforts of our senior management. The loss of the services of any of our executive officers for any reason could have a material adverse effect on our business, operating results and financial condition. In addition, our future success depends on our ability to attract and retain experienced underwriters, brokers and other professional personnel.

Competition for such experienced professional personnel is intense. If we cannot hire and retain talented personnel, our business, operating results and financial condition could be adversely affected.

We are subject to increasing costs arising from errors and omissions claims against us.

We have experienced an increase in the frequency and severity of errors and omissions claims against us, which has and will continue to substantially increase our risk management expenses. In our insurance brokerage business, we often assist our clients with matters which include the placement of insurance coverage and the handling of related claims. Errors and omissions claims against us may allege our potential liability for all or part of the amounts in question. Errors and omissions claims could include, for example, the failure of our employees or sub-agents, whether negligently or intentionally, to place coverage correctly or notify claims on behalf of clients or to provide insurance carriers with complete and accurate information relating to the risks being insured. It is not always possible to prevent and detect errors and omissions, and the precautions we take may not be effective in all cases. In addition, errors and omissions claims may harm our reputation or divert management resources away from operating our business.

Our businesses are subject to extensive governmental regulation which could reduce our profitability or limit our growth.

Our businesses are subject to extensive federal, state and foreign governmental regulation and supervision, which could reduce our profitability or limit our growth by increasing the costs of regulatory compliance, limiting or restricting the products or services we sell or the methods by which we sell our products and services or subjecting our businesses to the possibility of regulatory actions or proceedings. With respect to our insurance brokerage businesses, this supervision generally includes the licensing of insurance brokers and agents and third-party administrators and the regulation of the handling and investment of client funds held in a fiduciary capacity. Our continuing ability to provide insurance brokering and third-party administration in the jurisdictions in which we currently operate depends on our compliance with the rules and regulations promulgated from time to time by the regulatory authorities in each of these jurisdictions. Also, we can be affected indirectly by the governmental regulation and supervision of other insurance companies. For instance, if we are providing managing general underwriting services for an insurer we may have to contend with regulations affecting our client. Further, regulation affecting the insurance companies with whom our brokers place business can affect how we conduct those operations.

Most insurance regulations are designed to protect the interests of policyholders rather than stockholders and other investors. In the United States, this system of regulation, generally administered by a department of insurance in each state in which we do business, affects the way we can conduct our insurance underwriting business. Furthermore, state insurance departments conduct periodic examinations of the affairs of insurance companies and require the filing of annual and other reports relating to the financial condition of insurance companies, holding company issues and other matters.

Although the federal government does not directly regulate the insurance business, federal legislation and administrative policies in several areas, including employee benefit plan regulation, age, race, disability and sex discrimination, investment company regulation, financial services regulation, securities laws and federal taxation, do affect the insurance industry generally and our insurance underwriting subsidiaries in particular. For example, recently adopted federal financial services modernization legislation and privacy laws, such as the Health Insurance Portability and Accountability Act of 1996 and the Gramm-Leach-Bliley Act (as it relates to the use of medical and financial information by insurers), may result in additional regulatory compliance costs, limit the ability of our insurance underwriting subsidiaries to market their products or otherwise constrain the nature and scope of our operations. With respect to our international operations, we are subject to various regulations relating to, among other things, licensing, currency, policy language and terms, reserves and

the amount of local investment. These various regulations also add to our cost of doing business through increased compliance expenses, the financial impact of use of capital restrictions and increased training and employee expenses. Furthermore, the loss of a license in a particular jurisdiction could restrict or eliminate our ability to conduct business in that jurisdiction.

In all jurisdictions the applicable laws and regulations are subject to amendment or interpretation by regulatory authorities. Generally, such authorities are vested with relatively broad discretion to grant, renew and revoke licenses and approvals, and to implement regulations. Accordingly, we may be precluded or temporarily suspended from carrying on some or all of our activities or otherwise fined or penalized in a given jurisdiction. No assurances can be given that our businesses can continue to be conducted in any given jurisdiction as they have been in the past.

Our significant global operations expose us to various international risks that could adversely affect our business.

A significant portion of our operations is conducted outside the United States. Accordingly, we are subject to legal, economic and market risks associated with operating in foreign countries, including:

•: the general economic and political conditions existing in those countries;
•: imposition of limitations on conversion of foreign currencies or remittance of dividends and other payments by foreign subsidiaries;
•: imposition or increase of withholding and other taxes on remittances and other payments by subsidiaries;
•: hyperinflation in certain foreign countries;
•: imposition or increase of investment and other restrictions by foreign governments;
•: longer payment cycles;
•: greater difficulties in accounts receivables collection; and
•: the requirement of complying with a wide variety of foreign laws.

Some of our foreign brokerage subsidiaries receive revenues in currencies that differ from their functional currencies. We must also translate the financial results of our foreign subsidiaries into United States dollars. Although we use various derivative financial instruments to help protect against adverse transaction and translation effects due to exchange rate fluctuations, we cannot eliminate such risks, and significant changes in exchange rates may adversely affect our results.

Our financial results could be adversely affected if our underwriting reserves differ from actual experience.

We maintain reserves as an estimate of our liability under insurance policies issued by our insurance underwriting subsidiaries. The reserves that we maintain that could cause variability in our financial results consist of (1) unearned premium reserves, (2) policy and contract claim reserves and (3) future policy benefit reserves. Unearned premium reserves generally reflect our liability to return premiums we have collected under policies in the event of the lapse or cancellation of those policies. Under accounting principles generally accepted in the United States, premiums we have collected generally become "earned" over the life of a policy by means of a reduction in the amount of the unearned premium reserve associated with the policy. Unearned premium reserves are particularly significant with respect to our warranty business, given that the premiums we receive for warranty products generally cover an extended period of time. If there are significant lapses or cancellations of these types of policies, or expected losses for existing policies develop adversely and therefore premiums are not earned as expected, it may be necessary to accelerate the amortization of deferred

acquisition expenses associated with the policies because these deferred expenses are amortized over the projected life of the policies or establish additional reserves to cover premium deficiencies.

Policy and contract claim reserves reflect our estimated liability for unpaid claims and claims adjustment expenses, including legal and other fees and general expenses for administering the claims adjustment process, and for reported and unreported losses incurred as of the end of each accounting period. If the reserves originally established for future claims prove inadequate, we would be required to increase our liabilities, which could have an adverse effect on our business, results of operations and financial condition.

The obligation for policy and contract claims does not represent an exact calculation of liability. Rather, reserves represent our best estimate of what we expect the ultimate settlement and administration of claims will cost. These estimates represent informed judgments based on our assessment of currently available data, as well as estimates of future trends in claims severity, frequency, judicial theories of liability and other factors. Many of these factors are not quantifiable in advance and both internal and external events, such as changes in claims handling procedures, inflation, judicial and legal developments and legislative changes, can cause our estimates to vary. The inherent uncertainty of estimating reserves is greater for certain types of liabilities, where the variables affecting these types of claims are subject to change and long periods of time may elapse before a definitive determination of liability is made. Reserve estimates are periodically refined as experience develops and further losses are reported and settled. Adjustments to reserves are reflected in the results of the periods in which such estimates are changed. Because setting the level of reserves for policy and contract claims is inherently uncertain, we cannot assure you that our current reserves will prove adequate in light of subsequent events.

Future policy benefit reserves generally reflect our liability to provide future life insurance benefits and future accident and health insurance benefits on guaranteed renewable and non-cancelable policies. Future policy benefit reserves on accident and health and life products have been provided on the net level premium method. These reserves 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.

We may not realize all of the expected benefits from our business transformation plan.

In the fourth quarter of 2000, we began a comprehensive business transformation plan designed to enhance client service, improve productivity through process redesign and accelerate revenue growth. Outside of U.S. retail brokerage, the plan has been substantially implemented and has delivered the expected benefits, including improved revenue growth and enhanced productivity. Within U.S. retail brokerage, however, we experienced unexpected delays in implementing components of the plan, as well as higher than expected costs. As a result, we cannot assure you that we will realize all of the expected benefits associated with our business transformation plan. In addition, regardless of whether we are able to realize any of the benefits of the business transformation plan, we have incurred significant costs, which have been greater than those planned.

The perceived conflicts associated with our insurance brokerage and underwriting businesses could limit our growth.

Historically, we have not been able to fully exploit business opportunities due to the perceived conflicts associated with our insurance brokerage and underwriting businesses. For example, we have refrained from offering our extended warranty products and services through competing insurance brokers. Independent brokers have been reluctant to do business with our insurance underwriting business because they believed that any fees or information provided to us would ultimately benefit our competing brokerage business. These brokers also have been concerned that any information gleaned by our underwriting business regarding their clients and their clients' insurance needs would be shared

with our competing brokerage business to solicit new business from these clients. Similarly, competing underwriters have feared that our brokers could share information with our underwriting business in an effort to help secure desirable business or, alternatively, seek price quotes from them only for undesirable business. In the future, these perceived conflicts could limit our ability to expand our product and service offerings and seek new business through independent brokerage channels.

Each of our business lines may be adversely affected by an overall decline in economic activity.

The demand for property and casualty insurance generally rises as the overall level of economic activity increases and generally falls as such activity decreases, affecting both the commissions generated by our brokerage business and the premiums generated by our underwriting businesses. In particular, a growing number of insolvencies associated with an economic downturn, especially insolvencies in the insurance industry, could adversely affect our brokerage business through the loss of clients or by hampering our ability to place insurance and reinsurance business. Moreover, the results of our consulting business are generally affected by the level of business activity of our clients, which in turn is affected by the level of economic activity in the industries and markets these clients serve. As our clients become adversely affected by declining business conditions, they may choose to delay or forgo consulting engagements with us.

Recent and proposed accounting rule changes could negatively affect our financial position and results.

Recent accounting changes effected and proposals made could negatively affect our financial position or results of operations. Under Financial Accounting Standards Board Statement No. 142 (Statement No. 142), which we adopted on January 1, 2002, goodwill is no longer being amortized, but must instead be tested annually for impairment in its value. Goodwill is the excess of cost over net assets purchased relating to business acquisitions. As of December 31, 2002, we had approximately $4.1 billion of goodwill on our balance sheet. If an impairment exists, we must recognize a non-cash charge equal to the impairment, thereby reducing our net worth. Under our principal credit facility that supports our commercial paper program, we are required to maintain a minimum net worth of $2.5 billion. As of December 31, 2002, our net worth calculated for this purpose was $3.9 billion. In connection with our adoption of Statement No. 142 we tested our goodwill and found no impairment as of January 1, 2002. We have finalized our testing for 2002 and found no impairment. However, we cannot assure you that impairment will not exist when we perform testing in future periods, and any impairment charge we would be required to take would have a negative effect on our financial position and results.

We have substantial debt outstanding that could adversely affect our financial flexibility and prevent us from fulfilling our obligations under the notes.

We have substantial debt outstanding. As of December 31, 2002, we had total consolidated debt outstanding (including for this purpose our mandatorily redeemable preferred capital securities) of approximately $2.5 billion. This substantial amount of debt outstanding could adversely affect our financial flexibility and make it difficult for us to make interest payments under the notes.

We are a holding company and, therefore, may not be able to receive dividends in needed amounts.

Our principal assets are the shares of capital stock of our subsidiaries, including our insurance underwriting companies. We have to rely on dividends from these subsidiaries to meet our obligations for paying principal and interest on outstanding debt obligations, including the notes, and for paying dividends to stockholders and corporate expenses. Payments from our underwriting subsidiaries are limited by governmental regulation and will depend on the surplus and future earnings of these subsidiaries. In some circumstances, specific payments from our insurance underwriting subsidiaries may require prior regulatory approval, and we may not be able to receive dividends from these subsidiaries at times and in the amounts we anticipate or require.

The volume of premiums we write and our profitability are affected by the availability of reinsurance and the size and adequacy of our insurance company subsidiaries' capital base.

The level of business that our insurance underwriting subsidiaries are able to write depends on the size and adequacy of their capital base. Many state insurance laws to which they are subject impose risk-based capital requirements for purposes of regulating insurer solvency. Insurers having less statutory surplus than that required by the risk-based capital model formula generally are subject to varying degrees of regulatory scrutiny and intervention depending on the level of capital inadequacy. As of December 31, 2002, each of our insurance company subsidiaries met the risk-based statutory surplus requirements of every state in which it conducts business.

We purchase reinsurance for certain of the risks underwritten by our insurance company subsidiaries. Market conditions beyond our control determine the availability and cost of the reinsurance protection we purchase, which may affect the level of business we are able to write and our profitability. We cannot assure you that we will be able to maintain our current reinsurance facilities or that we can obtain other reinsurance facilities in adequate amounts and at favorable rates. If we are unable to renew our expiring facilities or to obtain new reinsurance facilities, either our net exposures would increase or, if we are unwilling to bear an increase in net exposures, we would have to reduce the level of our underwriting commitments. Either of these potential developments could adversely affect our underwriting business.

We cannot guarantee that our reinsurers will pay in a timely fashion, if at all.

To better manage our portfolio of underwriting risk, we may, from time to time, purchase reinsurance by transferring part of the risk that we will assume (known as ceding) to a reinsurance company in exchange for part of the premium that we will receive in connection with the risk. Although reinsurance would make the reinsurer liable to us to the extent the risk were transferred (or ceded) to the reinsurer, it would not relieve us of our liability to our policyholders. Accordingly, we will bear credit risk with respect to our reinsurers, if any. Recently, due to industry and general economic conditions, there is an increasing risk of insolvency among reinsurance companies, resulting in a greater incidence of litigation and affecting the recoverability of claims. We cannot assure you that our reinsurers, if any, will pay the reinsurance recoverables owed to us or that they will pay these recoverables on a timely basis.

Risk Factors Relating to the Exchange Offer

You must carefully follow the required procedures in order to exchange your original notes.

The exchange notes will be issued in exchange for original notes only after timely receipt by the exchange agent of a duly executed letter of transmittal and all other required documents. Therefore, if you wish to tender your original notes, you must allow sufficient time to ensure timely delivery. Neither we nor the exchange agent has any duty to notify you of defects or irregularities with respect to tenders of original notes for exchange. Any holder of original notes who tenders in the exchange offer for the purpose of participating in a distribution of the exchange notes will be required to comply with the registration and prospectus delivery requirements of the Securities Act in connection with any resale transaction. Each broker or dealer that receives exchange notes for its own account in exchange for original notes that were acquired in market-making or other trading activities must acknowledge that it will deliver a prospectus in connection with any resale of the exchange notes. See "Plan of Distribution."

If you do not exchange original notes for exchange notes, transfer restrictions will continue and trading of the original notes may be adversely affected.

The original notes have not been registered under the Securities Act and are subject to substantial restrictions on transfer. Original notes that are not tendered for exchange for exchange notes or are tendered but are not accepted will, following completion of the exchange offer, continue to be subject to existing restrictions upon transfers. We do not currently expect to register the original notes under the Securities Act. To the extent that original notes are tendered and accepted in the exchange offer, the trading market for original notes, if any, could be adversely affected. See "The Exchange Offer—Consequences of Failure to Exchange."

Risk Factors Relating to an Investment in the Notes

The notes are effectively subordinated to the obligations of our subsidiaries.

Because we are a holding company, the holders of notes may not receive assets of our subsidiaries in a liquidation or recapitalization until the claims of subsidiaries' creditors and insurance policyholders (in the case of insurance subsidiaries) are paid, except to the extent that we may have recognized claims against such subsidiaries.

The original notes are subject to restrictions on transfer.

We relied on an exemption from the registration requirements of the Securities Act and applicable state securities laws in offering the original notes. Accordingly, the original notes may be transferred or resold only in transactions registered, or exempt from registration, under the Securities Act and applicable state securities laws. The exchange of the original notes for exchange notes has been registered under the Securities Act.

Investors may find it difficult to trade the notes.

There is currently no public market for the original notes. The exchange notes are a new issue of securities with no established trading market. We do not intend to apply for listing of the notes on any securities exchange or for inclusion in any automated quotation system. Although the initial purchasers have informed us that they intend to make a market in the original notes and, if issued, the exchange notes, they are under no obligation to do so and may discontinue any market-making activities at any time without notice. Any such market-making will be subject to the limitations imposed by the Securities Act and the Exchange Act and may be limited during the exchange offer.

We cannot assure you that you will be able to sell your original notes or exchange notes at a particular time or that the prices that you receive when you sell will be favorable. We also cannot assure you as to the level of liquidity of the trading market for the exchange notes or, in the case of any holders of original notes that do not participate in the exchange offer, the trading market for the original notes. Future trading prices of the original notes and exchange notes will depend on many factors, including:

•: our operating performance and financial condition;
•: our ability to complete the offer to exchange the original notes for the exchange notes;
•: the interest of securities dealers in making a market for the original notes and the exchange notes; and
•: the market for similar securities.

SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

This prospectus and the documents incorporated or deemed to be incorporated by reference herein contain statements concerning our future results and performance and other matters that are "forward-looking" statements within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934. The words "anticipates," "believes," "estimates," "expects," "plans," "intends" and similar expressions are intended, but are not the exclusive means, to identify these forward-looking statements. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from historical or anticipated results, depending on a variety of factors. Potential factors that could affect results include those described above under the caption "Risk Factors." In light of these risks, uncertainties and assumptions, the forward-looking events discussed in this prospectus or documents incorporated or deemed to be incorporated by reference herein might not occur. We will not update forward-looking statements even though our situation may change in the future.

USE OF PROCEEDS

The exchange offer is intended to satisfy certain agreements we made with the initial purchasers of the original notes. We will not receive any cash proceeds from the issuance of the exchange notes offered by this prospectus. In consideration for issuing the exchange notes contemplated by this prospectus, we will receive the original notes in like principal amount, the form and terms of which are substantially the same as the form and term of the exchange notes (which replace the original notes, except as otherwise described in this prospectus, and which represent the same indebtedness). The original notes surrendered in exchange for the exchange notes will be retired and canceled and cannot be reissued. Accordingly, the issuance of the exchange notes will not result in any increase or decrease in our indebtedness.

We received approximately $223 million of net proceeds from the offering of the original notes (after deducting the initial purchasers' discounts and offering expenses). We used all of the net proceeds from these offerings to extend our debt maturities, to retire a portion of other indebtedness and preferred capital securities and for other general corporate purposes.

RATIOS OF EARNINGS TO FIXED CHARGES

Our ratios of earnings to fixed charges for each of the periods indicated are as follows:

		Nine Months Ended September 30,				Year Ended December 31,
		2002		2001		2001		2000		1999		1998		1997
Ratio of earnings to fixed charges		4.2x		2.4x		2.3x		4.2x		3.7x		5.4x		4.3x

For purposes of calculating the ratio, earnings consist of income from continuing operations before provision for income taxes and minority interests and before fixed charges. Fixed charges include interest expense, interest credited on investment-type insurance contracts and that portion of rental expense we deem to represent interest. Our earnings and fixed charges include the earnings and fixed charges of Aon Corporation and its subsidiaries considered as one enterprise.

THE EXCHANGE OFFER

Purposes and Effects of the Exchange Offer

We sold the original notes on December 16, 2002 to the initial purchasers, who resold the original notes to "qualified institutional buyers" (as defined in Rule 144A under the Securities Act) in a private offering. In the registration rights agreement we agreed to file with the SEC a registration statement (the "exchange registration statement") with respect to an offer to exchange the original notes for exchange notes and to effect the exchange offer within 210 days following the sale of the original notes. A copy of the registration rights agreement has been filed as an exhibit to the registration statement of which this prospectus is a part.

The exchange offer is being made pursuant to the registration rights agreement to satisfy our obligations under that agreement. You are a "holder" with respect to the exchange offer if your original notes are registered in your name on our books or if you have obtained a properly completed bond power from the registered holder or any person whose original notes are held of record by DTC. Upon completion of the exchange offer, we will not be required to file any registration statement to register any outstanding original notes. If you do not tender your original notes, or if your original notes are tendered but not accepted, you generally will have to rely on exemptions to registration requirements under the securities laws, including the Securities Act, if you wish to sell your original notes.

Based on interpretations by the staff of the SEC set forth in no-action letters issued to third parties unrelated to Aon, we believe that you may offer for resale, resell or otherwise transfer the exchange notes issued to you, unless you are an "affiliate" of Aon within the meaning of Rule 405 under the Securities Act and except as set forth in the next paragraph, without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that you acquire the exchange notes in the ordinary course of business and you are not engaged, do not intend to engage, and have no arrangement or understanding with any person to engage, in the distribution of the exchange notes. If you participate in the exchange offer for the purpose of distributing securities in a manner not permitted by the SEC's interpretation, the position of the staff of the SEC enunciated in the interpretive letters is inapplicable to you and you are required to comply with the registration and prospectus delivery requirements of the Securities Act in connection with any resale transaction. Each broker-dealer that receives exchange notes for its own account as a result of market-making activities or other trading activities must acknowledge that it will deliver a prospectus in connection with any resale of the exchange notes. See "Plan of Distribution."

The exchange offer is not being made to you, and you may not participate in the exchange offer, in any jurisdiction in which the exchange offer or its acceptance would not be in compliance with the securities laws of that jurisdiction. Prior to the exchange offer, however, we will use our reasonable best efforts to register or qualify the exchange notes for offer and sale under the securities laws of any jurisdictions necessary to permit completion of the exchange offer and do any and all other acts or things necessary or advisable to enable the offer and sale of the exchange notes in those jurisdictions.

Terms of the Exchange Offer

Upon the terms and subject to the conditions set forth in this prospectus and in the accompanying letter of transmittal, we will accept any and all original notes validly tendered prior to 5:00 p.m., New York City time, on the expiration date. We will issue up to $225 million aggregate principal amount of exchange notes in exchange for a like principal amount of outstanding original notes that are validly tendered and accepted in the exchange offer. Subject to the conditions of the exchange offer described below, we will accept any and all original notes that are validly tendered. You may tender some or all of your original notes pursuant to the exchange offer.

The exchange offer is not conditioned upon any number or aggregate principal amount of original notes being tendered.

The form and terms of the exchange notes will be the same in all material respects as the form and terms of the original notes, except that the exchange notes will be registered under the Securities Act and hence will not bear legends restricting their transfer. The exchange notes will not represent additional indebtedness of Aon and will be entitled to the benefits of the indenture, which is the same indenture under which the original notes were issued. Original notes that are accepted for exchange will be cancelled and retired.

Interest on the exchange notes will accrue from the most recent date to which interest has been paid on the original notes or, if no interest has been paid on the original notes, December 16, 2002. Accordingly, registered holders of exchange notes on the relevant record date for the first interest payment date following the completion of the exchange offer will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid on the original notes, December 16, 2002. Original notes accepted for exchange will cease to accrue interest from and after the date the exchange offer closes. If your original notes are accepted for exchange, you will not receive any payment in respect of interest on the original notes for which the record date occurs on or after completion of the exchange offer.

You do not have any appraisal or dissenters' rights under the indenture in connection with the exchange offer. We intend to conduct the exchange offer in accordance with the provisions of the registration rights agreement. If you do not tender for exchange or if your tender is not accepted, the original notes will remain outstanding and you will be entitled to the benefits of the indenture, but will not be entitled to any registration rights under the registration rights agreement.

We will be deemed to have accepted validly tendered original notes when, as and if we have given oral or written notice of acceptance to the exchange agent for the exchange offer. The exchange agent will act as agent for the tendering holders for the purpose of receiving the exchange notes from us.

If any tendered original notes are not accepted for exchange because of an invalid tender, the occurrence of certain other events set forth in this prospectus or otherwise, we will return the certificates (if any) for the unaccepted original notes to the tendering holders of those notes, without expense, as promptly as practicable after the expiration date.

If you tender your original notes in the exchange offer, you will not be required to pay brokerage commissions or fees or, subject to the instructions in the letter of transmittal, transfer taxes with respect to the exchange of original notes pursuant to the exchange offer. We will pay all charges and expenses, other than certain applicable taxes described below, in connection with the exchange offer. See "—Fees and Expenses" below.

Conditions of the Exchange Offer

Our obligation to consummate the exchange offer is not subject to any conditions, other than that the exchange offer does not violate any applicable law or SEC staff interpretation. Accordingly, we will not be required to accept for exchange any original notes tendered and may terminate or amend the exchange offer as provided herein before the acceptance of any original notes if:

•: any action or proceeding is instituted or threatened in any court or by or before any governmental agency or regulatory authority with respect to the exchange offer which, in our judgment, could reasonably be expected to materially impair our ability to proceed with the exchange offer; or

•: there shall have been proposed, adopted or enacted any law, statute, rule, regulation, order or SEC staff interpretation which, in our judgment, could reasonably be expected to materially impair our ability to proceed with the exchange offer.

The foregoing conditions are for our sole benefit and may be asserted regardless of the circumstances giving rise to the conditions or may be waived by us in whole or in part at any time and from time to time in our sole discretion. If we waive or amend the foregoing conditions, we will, if required by applicable law, extend the exchange offer for a minimum of five business days from the date that we first give notice, by public announcement or otherwise, of such waiver or amendment, if the exchange offer would otherwise expire within that five business-day period. Our determination concerning the events described above will be final and binding upon all parties.

Expiration Date; Extension; Termination; Amendments

The exchange offer will expire at 5:00 p.m., New York City time, on , 2003, unless extended (the "expiration date"). We reserve the right to extend the exchange offer at our discretion, in which event the term "expiration date" shall mean the time and date on which the exchange offer as so extended shall expire. We will notify the exchange agent of any extension by oral or written notice and will make a public announcement to that effect, each prior to 9:00 a.m., New York City time, on the next business day after the previously scheduled expiration date. We reserve the right, in our sole discretion, to:

•: delay accepting for exchange any original notes for exchange notes or to extend or terminate the exchange offer and not accept for exchange any original notes for exchange notes if any of the events set forth below under "—Conditions of the Exchange Offer" occur and we do not waive the condition by giving oral or written notice of the delay or termination to the exchange agent; or
•: amend the terms of the exchange offer in any manner.

Any delay in acceptance for exchange, extension or amendment will be followed as promptly as practicable by a public announcement of the delay. If we amend the exchange offer in a manner we determine constitutes a material change, we will promptly disclose the amendment in a manner reasonably calculated to inform the holders of original notes of the amendment, and we will extend the exchange offer for a period of five to ten business days, depending upon the significance of the amendment and the manner of disclosure to the holders of the original notes, if the exchange offer would otherwise expire during that five to ten business day period. The rights we have reserved in this paragraph are in addition to our rights set forth below under "—Conditions of the Exchange Offer."

Procedures For Tendering

Only a holder of original notes may tender them in the exchange offer. To validly tender in the exchange offer by book-entry transfer, you must deliver an agent's message or a completed and signed letter of transmittal (or facsimile thereof), together with any required signature guarantees and any other required documents, to the exchange agent prior to 5:00 p.m., New York City time, on the expiration date, and the original notes must be tendered pursuant to the procedures for book-entry transfer set forth below. To validly tender by means other than book-entry transfer, you must deliver a completed and signed letter of transmittal (or facsimile thereof), together with any required signature guarantees and any other required documents and the original notes, to the exchange agent prior to 5:00 p.m., New York City time, on the expiration date.

Any financial institution that is a participant in DTC's Book-Entry Transfer Facility system may make book-entry delivery of the original notes by causing DTC to transfer the original notes into the exchange agent's account in accordance with DTC's ATOP procedures for transfer. However, although

delivery of original notes may be effected through book-entry transfer into the exchange agent's account at DTC, an agent's message or a completed and signed letter of transmittal (or facsimile thereof), with any required signature guarantees and any other required documents, must, in any case, be transmitted to and received or confirmed by the exchange agent at its addresses set forth below under "—Exchange Agent" prior to 5:00 p.m., New York City time, on the expiration date, or the guaranteed delivery procedure set forth below must be complied with. DELIVERY OF DOCUMENTS TO DTC IN ACCORDANCE WITH DTC'S PROCEDURES DOES NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.

The term "agent's message" means, with respect to any tendered original notes, a message transmitted by DTC to and received by the exchange agent and forming part of a book-entry confirmation, stating that DTC has received an express acknowledgment from each tendering participant to the effect that, with respect to those original notes, the participant has received and agrees to be bound by the letter of transmittal and that Aon may enforce the letter of transmittal against the participant. The term "book-entry confirmation" means a timely confirmation of a book-entry transfer of original notes into the exchange agent's account at DTC.

If you tender an original note, and do not validly withdraw your tender, your actions will constitute an agreement with us in accordance with the terms and subject to the conditions set forth in this prospectus and in the letter of transmittal.

The method of delivery of your original notes and the letter of transmittal and all other required documents to the exchange agent is at your election and risk. Instead of delivery by mail, we recommend that you use an overnight or hand delivery service. In all cases, you should allow sufficient time to assure delivery to the exchange agent before the expiration date. No letter of transmittal or original note should be sent to Aon; instead, they should be sent to the exchange agent. You may request that your broker, dealer, commercial bank, trust company or nominee effect the tender for you.

Signatures on a letter of transmittal or a notice of withdrawal, as the case may be, must be guaranteed by an eligible institution (as defined below) unless the original notes are being tendered:

•: by a registered holder who has not completed the box entitled "Special Issuance Instructions" or "Special Delivery Instructions" on the letter of transmittal; or
•: for the account of an eligible institution.

If signatures on a letter of transmittal or a notice of withdrawal, as the case may be, are required to be guaranteed, the guarantee must be by a member of a signature guarantee program within the meaning of Rule 17Ad-15 under the Exchange Act (an "eligible institution").

If the letter of transmittal or any original notes or bond powers are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, those persons should so indicate when signing, and unless we waive it, evidence satisfactory to us of their authority to act must be submitted with the letter of transmittal.

We will determine, in our sole discretion, all questions as to the validity, form, eligibility (including time of receipt) and acceptance and withdrawal of tendered original notes. Our determination will be final and binding. We reserve the absolute right to reject any and all original notes not properly tendered or any original notes our acceptance of which would, in the opinion of our counsel, be unlawful. We also reserve the right to waive any defects, irregularities or conditions of tender as to particular original notes. Our interpretation of the terms and conditions of the exchange offer (including the instructions in the letter of transmittal) will be final and binding on all parties.

Unless waived, you must cure any defects or irregularities in connection with tenders of your original notes within a time period we will determine. Although we intend to request that the exchange agent notify you of defects or irregularities with respect to your tender of original notes, we will not,

nor will the exchange agent or any other person, incur any liability for failure to give you any notification. Tenders of original notes will not be deemed to have been made until any defects or irregularities have been cured or waived. Any original notes received by the exchange agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the exchange agent to the tendering holders, unless otherwise provided in the letter of transmittal, as soon as practicable following the expiration date.

In addition, we reserve the right in our sole discretion (subject to the limitations contained in the indenture):

•: to purchase or make offers for any original notes that remain outstanding after the expiration date; and
•: to the extent permitted by applicable law, to purchase original notes in the open market, in privately negotiated transactions or otherwise.

The terms of any purchases or offers could differ from the terms of the exchange offer.

By tendering, you represent to us, among other things, that:

•: you are obtaining the exchange notes in the ordinary course of business whether or not you are the holder;
•: you do not have an arrangement or understanding with any person to participate in the distribution of the exchange notes; and
•: you are not an "affiliate," as defined in Rule 405 under the Securities Act, of Aon or, if you are an affiliate of Aon, that you will comply with the registration and prospectus delivery requirements of the Securities Act, to the extent applicable.

If you are a broker-dealer that will receive exchange notes for your own account in exchange for original notes that were acquired as a result of market-making activities or other trading activities, you must acknowledge that you will deliver a prospectus in connection with any resale of the exchange notes.

Guaranteed Delivery Procedures

If you wish to tender your original notes and either your original notes are not immediately available, or you cannot deliver your original notes and other required documents to the exchange agent, or cannot complete the procedure for book-entry transfer prior to the expiration date, you may effect a tender if:

•: you make a tender through an eligible institution;
•: prior to the expiration date, the exchange agent receives from the eligible institution a properly completed and duly executed notice of guaranteed delivery (by facsimile transmission, mail or hand delivery) setting forth your name and address, the certificate number(s) of the original notes (if available) and the principal amount of original notes tendered together with a duly executed letter of transmittal (or a facsimile thereof), stating that the tender is being made thereby and guaranteeing that, within three business days after the expiration date, the certificate(s) representing the original notes to be tendered, in proper form for transfer (or a confirmation of a book-entry transfer into the exchange agent's account at DTC of original notes delivered electronically) and any other documents required by the letter of transmittal, will be deposited by the eligible institution with the exchange agent; and
•: the certificate(s) representing all tendered original notes in proper form for transfer (or confirmation of a book-entry transfer into the exchange agent's account at DTC of original notes

delivered electronically) and all other documents required by the letter of transmittal are received by the exchange agent within three business days after the expiration date.

Upon request to the exchange agent, you will be sent a notice of guaranteed delivery if you wish to tender your original notes according to the guaranteed delivery procedures set forth above.

Withdrawal of Tenders

Except as otherwise provided in this prospectus, you may withdraw any tenders of original notes at any time prior to 5:00 p.m., New York City time, on the expiration date, unless previously accepted for exchange.

For your withdrawal to be effective, the exchange agent must receive a written or facsimile transmission notice of withdrawal at its address set forth herein prior to 5:00 p.m., New York City time, on the expiration date, and prior to acceptance for exchange by Aon. Any notice of withdrawal must:

•: specify the name of the person having tendered the original notes to be withdrawn;
•: identify the original notes to be withdrawn (including the certificate number or numbers, if applicable, and principal amount of the original notes);
•: be signed in the same manner as the original signature on the letter of transmittal by which the original notes were tendered (including any required signature guarantees) or be accompanied by documents of transfer sufficient to have the trustee with respect to the original notes register the transfer of the original notes into the name of the person withdrawing the tender; and
•: specify the name in which any original notes are to be registered, if different from that of the person having tendered the original notes.

We will determine all questions as to the validity, form and eligibility (including time of receipt) of withdrawal notices. This determination shall be final and binding on all parties. Any original notes so withdrawn will be deemed not to have been validly tendered for purposes of the exchange offer and no exchange notes will be issued with respect to them unless the original notes so withdrawn are validly re-tendered. Any original notes which have been tendered but which are not accepted for exchange or which are withdrawn will be returned to you, without cost, as soon as practicable after withdrawal, rejection of tender or termination of the exchange offer. You may re-tender properly withdrawn original notes by following one of the procedures described above under "—Procedures for Tendering" at any time prior to the expiration date.

Fees and Expenses

We will bear the expenses of soliciting tenders pursuant to the exchange offer. The principal solicitation for tenders pursuant to the exchange offer is being made by mail; however, additional solicitation may be made by telegraph, telephone, telecopy, in person or by other means by our officers and regular employees and by officers and employees of our affiliates.

We have not retained any dealer-manager in connection with the exchange offer and will not make any payments to brokers, dealers or others soliciting acceptances of the exchange offer. However, we will pay the exchange agent reasonable and customary fees for its services and will reimburse it for its reasonable out-of-pocket expenses. We may also pay brokerage houses and other custodians, nominees and fiduciaries the reasonable out-of-pocket expenses incurred by them in forwarding copies of this prospectus, letters of transmittal and related documents to the beneficial owners of the original notes and in handling or forwarding tenders for exchange. We will pay the other expenses incurred in connection with the exchange offer, including fees and expenses of the trustee, accounting and legal fees and printing costs.

We will pay all transfer taxes, if any, applicable to the exchange of original notes pursuant to the exchange offer. If, however, certificates representing exchange notes or original notes for principal amounts not tendered or accepted for exchange are to be delivered to, or are to be issued in the name of, any person other than the registered holder of the original notes tendered, or if tendered original notes are registered in the name of any person other than the person signing the letter of transmittal, or if a transfer tax is imposed for any reason other than the exchange of original notes pursuant to the exchange offer, then the amount of any transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence of payment of any taxes or exemption therefrom is not submitted with the letter of transmittal, the amount of any transfer taxes will be billed directly to the tendering holder.

Resale of Exchange Notes

Based on an interpretation by the staff of the SEC set forth in no-action letters issued to third parties, we believe that, unless you are a broker-dealer or an affiliate of Aon, you may offer for resale, resell or otherwise transfer the exchange notes issued to you pursuant to the exchange offer without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that you acquire the exchange notes in the ordinary course of business and you do not intend to participate and have no arrangement or understanding with any person to participate in the distribution of the exchange notes. If you are an affiliate of Aon or if you tender in the exchange offer with the intention to participate, or for the purpose of participating, in a distribution of the exchange notes, you may not rely on the position of the staff of the SEC enunciated in Exxon Capital Holdings Corporation (available May 13, 1988) and Morgan Stanley & Co., Incorporated (available June 5, 1991), or similar no-action letters, but rather must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any resale transaction. In addition, any such resale transaction should be covered by an effective registration statement containing the selling security holders information required by Item 507 of Regulation S-K of the Securities Act. Each broker-dealer that receives exchange notes for its own account in exchange for original notes, where the original notes were acquired by the broker-dealer as a result of market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of the exchange notes. See "Plan of Distribution."

By tendering in the exchange offer, you represent to us that, among other things:

•

you are obtaining the exchange notes in the ordinary course of business;

•

you do not have an arrangement or understanding with any person to participate in the distribution of the exchange notes; and

•

you acknowledge that if you participate in the exchange offer for the purpose of distributing the exchange notes:

•: you must, in the absence of an exemption therefrom, comply with the registration and prospectus delivery requirements of the Securities Act in connection with any resale of the exchange notes and you cannot rely on the no-action letters described above; and
•: your failure to comply with those requirements could result in you incurring liability under the Securities Act for which you are not indemnified by us.

Further, if you are an "affiliate" (as defined under Rule 405 of the Securities Act) of Aon, by tendering in the exchange offer you will represent to us that you understand and acknowledge that the exchange notes may not be offered for resale, resold or otherwise transferred by you without registration under the Securities Act or an exemption from registration.

Consequences of Failure to Exchange

As a result of making of this exchange offer, we will have fulfilled some of our obligations under the registration rights agreement. You generally will not have any further registration rights under the registration rights agreement or otherwise if you do not tender your original notes. Accordingly, if you do not exchange your original notes for exchange notes, you will continue to hold your untendered original notes and will be entitled to all the rights and limitations applicable thereto under the indenture, except to the extent of those rights or limitations that, by their terms, terminate or cease to have further effectiveness as a result of the exchange offer (including the right to receive additional interest as a result of our failure to consummate the exchange offer or to cause a registration statement covering resales of original notes to become effective on or prior to July 14, 2003, as described under "Exchange Offer and Registration Rights").

The original notes that are not exchanged for exchange notes pursuant to the exchange offer will remain restricted securities. Accordingly, you may only resell the original notes:

•: to us or any of our subsidiaries;
•: to a qualified institutional buyer within the meaning of Rule 144A under the Securities Act in compliance with Rule 144A;
•: pursuant to an exemption from registration provided by Rule 144 under the Securities Act (if available); or
•: pursuant to a registration statement which has been declared effective under the Securities Act (and which continues to be effective at the time of such resale).

To the extent that any original notes are tendered and accepted in the exchange offer, the trading market, if any, for the untendered original notes could be adversely affected. See "—Termination of Certain Rights."

Termination of Certain Rights

You will not be entitled to certain rights under the registration rights agreement following the completion of the exchange offer. The right that will terminate is the right to receive additional interest as a result of our failure to consummate the exchange offer or to cause a registration statement covering resales of original notes to become effective on or prior to July 14, 2003, as described under "Exchange Offer and Registration Rights."

Other

Participation in the exchange offer is voluntary and you should carefully consider whether to accept. You are urged to consult your financial and tax advisors in making your decision on what action to take.

No person has been authorized to give any information or to make any representations in connection with the exchange offer other than those contained in this prospectus. If given or made, that information or those representations should not be relied upon as having been authorized by us. Neither the delivery of this prospectus nor any exchange made pursuant to the exchange offer will, under any circumstances, create any implication that there has been no change in our affairs or those of our subsidiaries since the respective dates as of which the information contained in this prospectus is given. The exchange offer is not being made to (and tenders will not be accepted from or on behalf of) holders of original notes in any jurisdiction in which the making of the exchange offer or the acceptance thereof would not be in compliance with the laws of such jurisdiction. However, we intend to take any action we deem necessary to permit the completion of the exchange offer in any jurisdiction and to extend the exchange offer to holders of original notes in that jurisdiction.

We may in the future seek to acquire original notes in open market or privately negotiated transactions, through subsequent exchange offers or otherwise. We have no present plans to acquire any original notes that are not tendered in the exchange offer nor to file a registration statement to permit resales of any original notes.

Accounting Treatment

The exchange notes will be recorded at the same carrying value as the original notes, as reflected in our accounting records on the date of the exchange. Accordingly, we will not recognize any gain or loss for accounting purposes upon the completion of the exchange offer. The expenses of the exchange offer will be amortized over the term of the exchange notes under generally accepted accounting principles.

Exchange Agent

The Bank of New York has been appointed as exchange agent for the exchange offer. All correspondence in connection with the exchange offer and the letter of transmittal should be addressed to the exchange agent, as follows:

By Mail, Hand or Overnight Courier:		By Facsimile:
The Bank of New York Corporate Trust Reorganization Unit 101 Barclay Street 7 East New York, New York 10286		The Bank of New York Corporate Trust Reorganization Unit (212) 298-1915
For Information or Confirmation by Telephone: (212) 815-3738

Requests for additional copies of this prospectus or the letter of transmittal should be directed to the exchange agent.

DESCRIPTION OF THE NOTES

The original notes were, and the exchange notes will be, issued under an indenture dated as of December 16, 2002 between us and The Bank of New York, as trustee. The terms of the notes include those stated in the indenture and those made a part of the indenture by reference to the Trust Indenture Act of 1939, as amended.

The following summary of selected provisions of the indenture and the notes is not complete and is subject to, and is qualified in its entirety by reference to, all of the provisions of the indenture and the notes. A copy of the indenture, including the forms of certificates evidencing the notes, has been filed as an exhibit to the registration statement of which this prospectus is a part.

In this section, references to "Aon," "we," "our" and "us" mean Aon Corporation excluding, unless the context otherwise requires or otherwise expressly stated, its subsidiaries. Capitalized terms that are used in the following summary but not defined have the meanings given to those terms in the indenture.

General

The original notes are, and the exchange notes will be, our unsecured and unsubordinated obligations, initially limited to $225 million in aggregate principal amount. The notes are not obligations of or guaranteed by any of our subsidiaries. Under the indenture we may, without the consent of the holders of the notes, issue additional notes from time to time in the future.

The notes will mature on December 14, 2012. Interest on the notes will accrue from December 16, 2002 or from the most recent date to which interest has been paid or duly provided for at a per annum rate of 7.375% and will be payable semi-annually in arrears on June 14 and December 14 of each year, beginning June 14, 2003. Interest on the notes will be payable to the persons in whose names the notes are registered at the close of business on the fifteenth calendar day, whether or not a business day, immediately preceding the applicable interest payment date.

The notes will be issued in fully registered form without coupons in denominations of $1,000 and integral multiples of $1,000. The notes will be denominated and payable in U.S. dollars.

The original notes were, and the exchange notes will be, issued in book-entry form, evidenced by one or more registered global certificates without coupons, which we sometimes refer to as "global notes," registered in the name of The Depository Trust Company ("DTC") or its nominee. Holders of interests in global notes will not be entitled to receive notes in definitive certificated form registered in their names except in the limited circumstances described below and in the private offering memorandum under which the original notes were issued. See "—Global Notes; Book-Entry System" for a summary of selected provisions applicable to transfer or exchange of global notes.

Notes in certificated form may be presented for payment and surrendered for registration of transfer or exchange at our agency maintained for that purpose in the Borough of Manhattan, The City of New York, currently the office of the trustee located at 101 Barclay Street, Floor 8W, New York, New York 10286. Holders will not be required to pay any charge for the registration of transfer or exchange of notes, other than any tax or other governmental charge payable in connection with the transfer or exchange, but subject to the limitations provided in the indenture.

Payment of interest on global notes will be made to DTC or its nominee. Payment of interest on notes in certificated form will be made against presentation of those notes at the agency referred to in the preceding paragraph or, at our option, by mailing checks payable to the persons entitled to that interest to their addresses as they appear in the note register.

The notes are not entitled to the benefit of any sinking fund nor subject to repurchase by us at the option of the holders prior to maturity. Except to the limited extent described below under

"—Consolidation and Merger," the indenture does not contain any provisions that are intended to protect holders of notes in the event of a highly-leveraged or similar transaction affecting us. Except to the limited extent described below under "—Certain Restrictions—Limitation on Liens," the indenture also does not limit our ability or the ability of any of our subsidiaries to incur additional debt in the future.

Because we are a holding company, the holders of the notes may not receive assets of our subsidiaries in a liquidation or recapitalization until the claims of our subsidiaries' creditors and insurance policyholders (in the case of insurance subsidiaries) are paid, except to the extent that we may have recognized claims against such subsidiaries. In addition, certain regulatory laws limit some of our subsidiaries from making payments to us of dividends and on loans and other transfers of funds.

Interest

The notes will bear interest at a rate of 7.375% per annum, which will be paid semi-annually in arrears on June 14 and December 14 of each year, beginning June 14, 2003. Each date of payment with respect to the notes is referred to as an "interest payment date." If any interest payment date or the maturity date for the notes falls on a day that is not a business day, the payment of principal and interest will be made on the next succeeding business day as if made on the date such payment was due, and no interest will accrue on such payment for the period from and after the interest payment date or the maturity date, as the case may be, to the date of such payment on the next succeeding business day.

Interest on the notes will accrue from, and including, the most recent interest payment date to which interest has been paid or duly provided for or, if no interest has been paid on the notes, December 16, 2002 to, but excluding, the next interest payment date or the maturity date, as the case may be. Interest on the notes will be computed on the basis of a 360-day year consisting of twelve 30-day months.

We will pay the interest payable on any interest payment date to the persons in whose name the notes are registered at the close of business on the fifteenth calendar day, whether or not a business day, immediately preceding that interest payment date. However, we will pay interest on the maturity date to the persons to whom the principal will be payable.

When we use the term "business day," we mean any day except a Saturday, Sunday or legal holiday on which banking institutions in The City of New York are authorized or required by law, regulation or executive order to close.

Optional Redemption

The notes are not redeemable prior to their maturity date.

Certain Restrictions

The following restriction will apply to the notes.

Limitation on Liens

Under the indenture we have agreed, among other things, to not, directly or indirectly, create, issue, assume, incur or guarantee any indebtedness for money borrowed which is secured by a mortgage, pledge, lien, security interest or other encumbrance of any nature on any of the present or future common stock of any of our significant subsidiaries (or any company besides us having direct or indirect control of any of our significant subsidiaries). This restriction will not apply if we ensure that the notes (together with, if we decide, any other indebtedness for money borrowed by us then existing or thereafter created which is not subordinate to the notes) will be secured equally and proportionately

with (or, at our option, prior to) such other secured indebtedness for as long as such indebtedness is secured.

For purposes of this restriction, "significant subsidiary" means any of our subsidiaries that constitutes a "significant subsidiary" as defined in Rule 1-02(w) of Regulation S-X under the Exchange Act.

Events of Default

An event of default with respect to the notes will occur under the indenture if:

•: we fail to pay the principal of the notes when due;
•: we fail to pay the interest on the notes when due and such failure continues for 30 days;
•: we fail to comply with any of our other agreements contained in the indenture and such failure continues for 90 days after written notice of that failure is given to us from the trustee (or to us and the trustee from the holders of at least 25% in principal amount of the outstanding notes); or
•: certain events of bankruptcy, insolvency or reorganization relating to us have occurred and are continuing.

If there is a continuing event of default with respect to the notes, the trustee or the holders of at least 25% in principal amount of the outstanding notes may require us to pay immediately the principal of and accrued and unpaid interest, if any, on all of the notes. However, at any time after the trustee or the holders, as the case may be, declare such acceleration with respect to the notes, but before the applicable person has obtained a judgment or decree for payment of the money, the holders of a majority in principal amount of the outstanding notes may, under certain conditions, cancel such acceleration if:

•: we have deposited with the trustee an amount sufficient to pay expenses incurred by the trustee, all overdue interest, if any, on the notes and the principal of any notes that have become due and interest thereon; and
•: we have cured all events of default (other than the non-payment of accelerated principal and interest, if any) with respect to the notes or all such events of default have been waived as provided in the indenture.

The indenture provides that, subject to the duties of the trustee to act with the required standard of care if there is a continuing event of default, the trustee need not exercise any of its rights or powers under the indenture at the request or direction of any of the holders of the notes, unless such holders have offered to the trustee security or indemnity satisfactory to the trustee. Subject to such provisions for security or indemnification of the trustee and certain other conditions, the holders of the majority in principal amount of the outstanding notes will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power the trustee holds with respect to the notes.

No holder of notes will have any right to institute any proceeding with respect to the indenture or for any remedy under the indenture unless:

•: the holder has previously given the trustee written notice of a continuing event of default with respect to the notes;
•: the holders of at least 25% in principal amount of the outstanding notes have made written request to the trustee to pursue such remedy;

•: the holder or holders have offered reasonable security or indemnity to the trustee against any costs, liability or expense of the trustee;
•: the trustee has failed to comply with the request within 60 days after receipt of the request and offer of indemnity; and
•: the trustee has not received from the holders of a majority in principal amount of the outstanding notes a direction inconsistent with the request.

However, each holder of notes will have an absolute and unconditional right to receive payment of the principal of or interest on the notes on or after the date or dates it becomes due as expressed in the notes and to institute suit for the enforcement of any such payment.

We are required to furnish annually to the trustee a statement as to the existence or absence of certain defaults under the indenture. The indenture provides that the trustee need not provide to the holders of the notes notice of any default (other than the non-payment of principal or interest) if it considers it in the interest of the holders not to provide such notice.

Defeasance

Defeasance and Discharge of Indenture

We may be discharged from any and all obligations in respect of the notes (except for certain obligations to register the transfer or exchange of notes, to replace stolen, destroyed, lost or mutilated notes, to maintain paying agencies, to compensate and indemnify the trustee and to furnish the trustee with the names and addresses of holders of notes), which we refer to as defeasance, if:

•: we irrevocably deposit with the trustee, in trust, money and/or securities of the United States government, or securities of agencies of the United States government backed by the full faith and credit of the United States government, in an amount certified by a nationally recognized firm of independent public accountants to be sufficient to pay the principal of and interest on the notes on the applicable due dates for those payments in accordance with the terms of the notes;
•: we deliver to the trustee either (i) an opinion of counsel, based on a ruling of the United States Internal Revenue Service (unless there has been a change in the applicable United States federal income tax law), to the effect that the holders of the notes will not recognize income, gain or loss for United States federal income tax purposes as a result of such defeasance and will be subject to United States federal income tax on the same amounts and in the same manner and a the same times as would have been the case if the defeasance had not occurred or (ii) a ruling of the United States Internal Revenue Service directed to the trustee to the same effect as set forth in clause (i) above;
•: immediately after giving effect to the deposit specified in the first bullet point, on a pro forma basis, no event of default with respect to the notes shall have occurred and be continuing on the date of deposit or, with respect to defaults occurring upon certain events of bankruptcy, insolvency or reorganization relating to us, at any time during the period ending on the 91st day after the date of the deposit;
•: if the notes are then listed on a national securities exchange, we deliver to the trustee an opinion of counsel to the effect that the notes will not be delisted as a result of such defeasance; and
•: we deliver to the trustee an officers' certificate and an opinion of counsel each stating that we have complied with all of the above requirements.

In addition, we may also be discharged from our obligations under the notes and the indenture (except for certain obligations specified above) if we, among other things, deposit with the trustee, in trust, money and/or government securities in an amount certified by a nationally recognized firm of independent public accountants to be sufficient to pay the principal of and interest on the notes, so long as the notes mature within one year.

Defeasance of Certain Obligations

We may omit to comply with the covenants described under "—Certain Restrictions—Limitation on Liens" and "—Consolidation and Merger" with respect to the notes, and any such omission will not constitute an event of default with respect to the notes, which we refer to as covenant defeasance, if:

•: we irrevocably deposit with the trustee, in trust, money and/or securities of the United States government, or securities of agencies of the United States government backed by the full faith and credit of the United States government, in an amount certified by a nationally recognized firm of independent public accountants to be sufficient to pay the principal of and interest on the notes on the applicable due dates for those payments in accordance with the terms of the notes;
•: we deliver to the trustee an opinion of counsel to the effect that the holders of the notes will not recognize income, gain or loss for United States federal income tax purposes as a result of such covenant defeasance and will be subject to United States federal income tax on the same amounts and in the same manner and at the same times as would have been the case if the covenant defeasance had not occurred;
•: immediately after giving effect to the deposit specified in the first bullet point, on a pro forma basis, no event of default with respect to the notes shall have occurred and be continuing on the date of the deposit or, with respect to defaults occurring upon certain events of bankruptcy, insolvency or reorganization relating to us, at any time during the period ending on the 91st day after the date of the deposit;
•: if the notes are then listed on a national securities exchange, we deliver to the trustee an opinion of counsel to the effect that the notes will not be delisted as a result of such covenant defeasance; and
•: we deliver to the trustee an officers' certificate and an opinion of counsel each stating that we have complied with all of the above requirements.

If we exercise our option to effect a defeasance or covenant defeasance with respect to the notes, as described above, and the trustee or paying agent is unable to apply any money or securities that we have deposited because of any legal proceeding or any order or judgment of any court of governmental authority, in each case our obligations under the indenture and the notes will be revived and reinstated.

Modification of the Indenture

The indenture provides that we and the trustee may amend or supplement the indenture or the notes without notice to or the consent of any holder of the notes to, among other things:

•: cure any ambiguity, defect or inconsistency in the indenture;
•: document the fact that a successor corporation has assumed our obligations;
•: comply with any requirements of the SEC in connection with any qualification of the indenture under the Trust Indenture Act of 1939;
•: evidence and provide for the acceptance of appointment of a successor trustee;

•: provide for uncertificated notes in addition to or in place of certificated notes;
•: add to our covenants for the benefit of the holders of the notes, add any additional events of default with respect to the notes or to surrender any right or power conferred on us; or
•: make any change that, in the good faith opinion of our board of directors, does not materially and adversely affect the rights of any holder of the notes.

In addition, we and the trustee may modify the indenture or the notes with the consent of the holders of at least a majority in principal amount of the outstanding notes. However, we may not modify the indenture or the notes without the consent of each holder affected to:

•: change the due date of the principal of or any installment of interest on any note;
•: reduce the principal amount of or interest rate on any note;
•: change any place or currency of payment of principal of or interest on any note;
•: impair the right to institute suit for the enforcement of any payment on or after it is due on any note;
•: reduce the percentage of principal amount of outstanding notes necessary to consent to the modification or amendment of the indenture or the notes or the waiver of compliance with certain provisions of or certain defaults under the indenture;
•: waive a default in the payment of principal of or interest on any note; or
•: amend any provision relating to modification of the indenture or the notes, except to increase the percentage of principal amount of outstanding notes necessary to consent to the modification or amendment of the indenture or the notes or to provide that certain other provisions of the indenture or the notes cannot be modified or waived without the consent of each holder affected.

The holders of a majority in aggregate principal amount of the notes may, on behalf of the holders of all of the notes, waive compliance by us with any provision of the indenture or the notes, including the restrictive covenant described above under "—Certain Restrictions—Limitation on Liens." The holders of at least a majority in principal amount of the outstanding notes, by notice to the trustee, may waive any existing default and its consequences under the indenture, except for a default in the payment of the principal of or any interest on the notes or in respect of a provision which under the indenture cannot be modified or amended without the consent of each holder of the outstanding notes affected.

Consolidation and Merger

The indenture provides that we may not consolidate with or merge into, or sell, convey, transfer or lease our properties and assets substantially as an entirety to, another person without the consent of noteholders unless, along with certain other conditions in the indenture:

•: the person (if other than us) formed by such consolidation or into which we merge or which acquires or leases our assets is a corporation organized and existing under the laws of the United States, any state thereof or the District of Columbia and expressly assumes our obligations on the notes and under the indenture;
•: after giving effect to such transaction, there is no event of default, and no event which, after notice or passage of time or both, would become an event of default;
•: if, as a result of any such consolidation, merger, sale, conveyance, transfer or lease our properties or assets would become subject to a mortgage, lien or other security interest that

would not be permitted under the indenture, we (or the person formed by such transaction, if other than us) take steps to secure the notes equally and ratably with all indebtedness secured thereby; and

•: we have delivered to the trustee an officers' certificate and an opinion of counsel each stating that such consolidation, merger, sale, conveyance, transfer or lease complies with these requirements.

Global Notes; Book-Entry System

Global Notes

Except as set forth below, the global original note and the global exchange note (collectively, the "global notes") may be transferred, in whole and not in part, only to DTC or another nominee of DTC or to a successor of DTC or its nominee. Beneficial interests in the global notes may not be exchanged for certificated notes except in the limited circumstances described below. The global original note, and any original notes issued in exchange therefor, will also be subject to certain restrictions on transfer set forth in this prospectus and in the offering memorandum under which the original notes were issued.

All interests in the global notes may be subject to the rules and procedures of DTC.

Certain Book-Entry Procedures for the Global Notes

The descriptions of the operations and procedures of DTC set forth below are provided solely as a matter of convenience. These operations and procedures are solely within the control of DTC and are subject to change by it from time to time. Neither we nor the initial purchasers take any responsibility for these operations or procedures, and investors are urged to contact DTC or its participants directly to discuss these matters.

DTC has advised us that it is:

•: a limited-purpose trust company organized under the laws of the State of New York;
•: a "banking organization" within the meaning of the New York Banking Law;
•: a member of the Federal Reserve System;
•: a "clearing corporation" within the meaning of the New York Uniform Commercial Code, as amended; and
•: a "clearing agency" registered pursuant to Section 17A of the Exchange Act.

DTC was created to hold securities for its participants (collectively, the "participants") and to facilitate the clearance and settlement of securities transactions between participants through electronic book-entry changes to the accounts of its participants, thereby eliminating the need for physical transfer and delivery of certificates. DTC's participants include securities brokers and dealers (including the initial purchasers), banks and trust companies, clearing corporations and certain other organizations. Indirect access to DTC's system is also available to other entities such as banks, brokers, dealers and trust companies (collectively, the "indirect participants") that clear through or maintain a custodial relationship with a participant, either directly or indirectly. Investors who are not participants may beneficially own securities held by or on behalf of DTC only through participants or indirect participants.

We expect that, pursuant to procedures established by DTC:

•: upon deposit of each global note, DTC will credit, on its book-entry registration and transfer system, the accounts of participants with an interest in the global note; and

•: ownership of beneficial interests in the global notes will be shown on, and the transfer of ownership of beneficial interests in the global notes will be effected only through, records maintained by DTC (with respect to the interests of participants) and the participants and the indirect participants (with respect to the interests of persons other than participants).

The laws of some jurisdictions may require that some purchasers of securities take physical delivery of those securities in definitive form. Accordingly, the ability to transfer beneficial interests in the notes represented by a global note to those persons may be limited. In addition, because DTC can act only on behalf of its participants, who in turn act on behalf of persons who hold interests through participants, the ability of a person holding a beneficial interest in a global note to pledge or transfer that interest to persons or entities that do not participate in DTC's system, or to otherwise take actions in respect of that interest, may be affected by the lack of a physical security in respect of that interest.

So long as DTC or its nominee is the registered owner of a global note, DTC or that nominee, as the case may be, will be considered the sole legal owner or holder of the notes represented by that global note for all purposes of the notes and the indenture. Except as provided below, owners of beneficial interests in a global note will not be entitled to have the notes represented by that global note registered in their names, will not receive or be entitled to receive physical delivery of certificated notes and will not be considered the owners or holders of the notes represented by that beneficial interest under the indenture for any purpose, including with respect to the giving of any direction, instruction or approval to the trustee. Accordingly, each holder owning a beneficial interest in a global note must rely on the procedures of DTC and, if that holder is not a participant or an indirect participant, on the procedures of the participant through which that holder owns its interest, to exercise any rights of a holder of notes under the indenture or that global note. We understand that under existing industry practice, in the event that we request any action of holders of notes, or a holder that is an owner of a beneficial interest in a global note desires to take any action that DTC, as the holder of that global note, is entitled to take, DTC would authorize the participants to take that action and the participants would authorize holders owning through those participants to take that action or would otherwise act upon the instruction of those holders. Neither we nor the trustee will have any responsibility or liability for any aspect of the records relating to or payments made on account of notes by DTC, or for maintaining, supervising or reviewing any records of DTC relating to the notes.

Payments with respect to the principal of and interest on a global note will be payable by the trustee to or at the direction of DTC or its nominee in its capacity as the registered holder of the global note under the indenture. Under the terms of the indenture, we and the trustee may treat the persons in whose names the notes, including the global notes, are registered as the owners thereof for the purpose of receiving payment thereon and for any and all other purposes whatsoever. Accordingly, neither we nor the trustee has or will have any responsibility or liability for the payment of those amounts to owners of beneficial interests in a global note. Payments by the participants and the indirect participants to the owners of beneficial interests in a global note will be governed by standing instructions and customary industry practice and will be the responsibility of the participants and indirect participants and not of DTC.

Transfers between participants in DTC will be effected in accordance with DTC's procedures and will be settled in same-day funds.

Although DTC has agreed to the foregoing procedures to facilitate transfers of interests in the global notes among participants in DTC, it is under no obligation to perform or to continue to perform those procedures, and those procedures may be discontinued at any time. Neither we nor the trustee will have any responsibility for the performance by DTC or its participants or indirect participants of their respective obligations under the rules and procedures governing DTC's operations.

We obtained the information in this section and elsewhere in this prospectus concerning DTC and its book-entry system from sources that we believe are reliable, but we take no responsibility for the accuracy of any of this information.

Certificated Notes

As described above, beneficial interests in the global notes generally may not be exchanged for certificated notes. However, the indenture provides that if:

•: the depositary for the global notes notifies us that it is unwilling or unable to continue as depositary for the global notes and we do not appoint a successor depositary within 90 days after we receive that notice of unwillingness or ineligibility; or
•: an event of default with respect to the notes has occurred and is continuing and the registrar for the notes has received a request from the depositary;

we will execute and the trustee will authenticate and deliver certificated notes in exchange for interests in the global notes. We anticipate that those certificated notes will be registered in such name or names as DTC instructs the trustee and that those instructions will be based upon directions received by DTC from its participants with respect to the ownership of beneficial interests in the global notes. Neither we nor the trustee shall be liable for any delay by DTC or any participant or indirect participant in identifying the owners of beneficial interests in the global notes and each of them may conclusively rely on, and will be protected in relying on, instructions from DTC for all purposes, including with respect to the registration and delivery, and the respective principal amounts, of the certificated notes to be issued.

Same-Day Payment

So long as DTC continues to make its settlement system available to us, all payments of principal of and interest on the global notes will be made by us in immediately available funds.

Applicable Law

The original notes and the indenture are, and the exchange notes will be, governed by and construed in accordance with the laws of the State of New York.

Concerning the Trustee

The Bank of New York is the trustee under the indenture. In the ordinary course of business, the trustee and its affiliates have provided and may in the future continue to provide investment banking, commercial banking and other financial services to us and our subsidiaries for which they have received and will receive compensation. The trustee is an affiliate of BNY Capital Markets, Inc., one of the initial purchasers. The Bank of New York is also serving as the exchange agent in the exchange offer.

EXCHANGE OFFER AND REGISTRATION RIGHTS

As a condition to the initial sale of the original notes, we entered into the registration rights agreement with the initial purchasers. In that agreement, we agreed to use our reasonable best efforts, at our cost, to file with the SEC and cause to become effective a registration statement (the "exchange registration statement") with respect to a registered offer (the "exchange offer") to exchange the original notes for the exchange notes.

The registration statement of which this prospectus is a part is the exchange registration statement described above, and the exchange offer described in this prospectus is the exchange offer referred to above. The terms of the exchange notes are substantially identical to the terms of the original notes, except that the exchange notes have been registered and the transfer restrictions, registration rights and provisions for additional interest in the event an exchange offer is not consummated within certain time periods relating to the original notes will not apply to the exchange notes.

If we determine that the exchange offer is not available or may not be consummated because it would violate applicable law or SEC staff interpretations, we may file after such determination a shelf registration statement (the "shelf registration statement") with respect to resales of the original notes. If we have determined to file and have caused the shelf registration statement to become effective, we will use our reasonable best efforts to keep the shelf registration statement effective until the expiration of the time period referred to in Rule 144(k) under the Securities Act with respect to the original notes, or such shorter period that will terminate when all original notes covered by the shelf registration statement have been sold pursuant to the shelf registration statement. We will, in the event of such an effective shelf registration statement, provide to each holder of original notes copies of the prospectus which is part of the shelf registration statement, notify such holders when the shelf registration statement becomes effective and take certain other actions as are required to permit resales of the original notes under the shelf registration statement. A holder that sells its original notes pursuant to the shelf registration statement:

•: generally will be required to be named as a selling securityholder in the related prospectus and to deliver a prospectus to the purchaser;
•: will be subject to certain of the civil liability provisions of the Securities Act in connection with such sales; and
•: will be bound by the provisions of the registration rights agreement that are applicable to such a holder (including indemnification obligations).

Under the registration rights agreement, if we do not consummate the exchange offer or cause a registration statement covering resales of original notes to become effective on or prior to July 14, 2003 (the date that is 210 days after the closing of the sale of the original notes), the annual interest rate on the original notes will be increased by 0.5% until we satisfy these obligations.

CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

The following summary describes certain U.S. federal income tax consequences of the ownership and disposition of the notes by an original purchaser of notes who acquired original notes at their issue price. This summary is based upon provisions of the Internal Revenue Code and regulations, rulings and judicial decisions as of the date hereof. Those authorities may be changed, possibly retroactively, so as to result in U.S. federal income tax consequences different from those summarized below. This summary discusses only notes held as capital assets within the meaning of Section 1221 of the Internal Revenue Code. This summary does not deal with holders that may be subject to special tax rules (including, but not limited to, insurance companies, dealers in securities or currencies, traders in securities who elect to apply the marked-to-market method of accounting, partnerships and other entities treated as pass-throughs for federal income tax purposes, expatriates, foreign persons, holders whose functional currency is not the U.S. dollar and holders of notes held as part of a "straddle," "hedge" or "conversion transaction" for federal income tax purposes, or as part of an integrated investment). This summary is for general information only and does not address all aspects of U.S. federal income taxation that may be relevant to holders of the notes in light of their particular circumstances, and it does not address any tax consequences arising under the laws of any state, local or foreign taxing jurisdiction. Accordingly, you should consult with your own tax advisor concerning the particular U.S. federal income tax consequences to you of the ownership of the notes, as well as the consequences to you arising under the laws of any other taxing jurisdiction.

Exchange of Original Notes for Exchange Notes

A holder will not recognize any taxable gain or loss on the exchange of original notes for exchange notes pursuant to the exchange offer, and a holder's tax basis and holding period in the exchange notes will be the same as in the original notes.

Interest

Interest on a note generally will be taxable to a holder as ordinary income as it accrues or is received in accordance with the holder's method of accounting for U.S. federal income tax purposes provided that the making of any payment of additional interest on the original notes due to our failure to satisfy certain of our obligations under the registration rights agreement (as described under "Exchange Offer and Registration Rights") was remote or incidental at the time the original notes were issued. We believe such likelihood was remote or incidental at such time within the meaning of applicable Treasury regulations.

If we fail to satisfy certain of our obligations under the registration rights agreement, additional interest will accrue on the original notes in the manner described under "Exchange Offer and Registration Rights." In the unlikely event that additional interest is paid on the original notes, we intend to take the position, which is not free from doubt, that holders of original notes would be required to report any such interest as ordinary income for U.S. federal income tax purposes when the payment is made. It is possible, however, that the Internal Revenue Service may take a different position, in which case the timing and amount may be different.

Disposition of Notes

Upon the sale, exchange, redemption, retirement or other disposition of a note, a holder generally will recognize gain or loss equal to the difference between the amount realized on the sale, exchange, redemption, retirement or other disposition (not including amounts attributable to accrued but unpaid interest, which will be taxable as ordinary income) and such holder's adjusted tax basis in the note. A holder's adjusted tax basis in a note will, in general, be the holder's cost thereof, less any principal payments received by such holder. Such gain or loss generally will be capital gain or loss, and will be

long-term capital gain or loss if, at the time of such sale, exchange, redemption, retirement or other disposition, the note has been held for more than one year. Long-term capital gain recognized by an individual investor will generally be taxed at a lower rate than ordinary income. Certain limitations may apply to the holder's use of capital losses.

Reporting and Withholding

Information reporting requirements apply to interest and principal payments made to, and to the proceeds of sale before maturity by, certain non-corporate owners of notes. In addition, a backup withholding tax at a rate equal to 30% (which rate is scheduled to be reduced in increments to 28% by 2006) applies to certain non-corporate holders who fail to provide a correct taxpayer identification number, certify, under penalties of perjury, that the holder is not subject to backup withholding tax or otherwise comply with applicable requirements of the backup withholding rules.

ERISA CONSIDERATIONS

We and certain of our affiliates may be considered a "party in interest" within the meaning of the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), or a "disqualified person" within the meaning of Section 4975 of the Internal Revenue Code with respect to many employee benefit plans. Prohibited transactions within the meaning of ERISA or the Internal Revenue Code may arise, for example, if the notes are acquired by or with the assets of a pension or other employee benefit plan with respect to which we or any of our affiliates is a service provider, unless the notes are acquired pursuant to an applicable exemption from the prohibited transaction rules.

Accordingly, by its acquisition and holding of the notes, each holder of the notes will be deemed to have represented that either (i) it has not used the assets of any benefit plan for purposes of acquiring the notes or (ii) if the assets of a benefit plan are used to acquire the notes, either directly or indirectly, the acquisition and holding of the notes do not constitute a non-exempt prohibited transaction under Section 406 of ERISA, Section 4975 of the Internal Revenue Code or any similar rules.

The sale of the notes to a plan is in no respect a representation by us that such an investment meets all relevant legal requirements with respect to investments by plans generally or any particular plan, or that such an investment is appropriate for plans generally or any particular plan.

Any party considering purchasing the notes on behalf of, or with the assets of, any benefit plan should consult with its counsel to confirm that such investment will not result in a prohibited transaction that is not subject to an exemption and will satisfy the other requirements of ERISA, the Internal Revenue Code and the Department of Labor regulations applicable to the plans.

PLAN OF DISTRIBUTION

Based on interpretations by SEC staff set forth in no-action letters issued to third parties, including the Exxon Capital and Morgan Stanley letters and similar letters, we believe that the exchange notes to be issued pursuant to the exchange offer in exchange for original notes may be offered for resale, resold, and otherwise transferred by any holder thereof (other than any holder which is an "affiliate" of Aon within the meaning of Rule 405 under Securities Act) without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that the exchange notes are acquired in the ordinary course of the holder's business and the holder has no arrangement with any person to participate in the distribution of the exchange notes. Accordingly, any holder using the exchange offer to participate in a distribution of the exchange notes will not be able to rely on these no-action letters. Notwithstanding the foregoing, each broker-dealer that receives exchange notes for its own account pursuant to the exchange offer must acknowledge that it will deliver a prospectus in connection with any resale of those exchange notes. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of exchange notes received in exchange for original notes where those original notes were acquired as a result of market-making activities or other trading activities. For a period of up to 180 days after the expiration date, we will promptly send additional copies of this prospectus and any amendment or supplement to this prospectus to any broker-dealer that requests these documents in the letter of transmittal. We have agreed to pay certain expenses incident to the exchange offer, other than commissions or concession of any brokers or dealers, and will indemnify the holders of the exchange notes (including any broker-dealers) against certain liabilities, including liabilities under the Securities Act.

We will not receive any proceeds from any sales of the exchange notes by broker-dealers. Exchange notes received by broker-dealers for their own account pursuant to the exchange offer may be sold from time to time in negotiated transactions, through the writing of options on the exchange notes or a combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to prevailing market prices or at negotiated prices. Any resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any broker-dealer and/or the purchasers of any exchange notes.

Any broker-dealer that resells the exchange notes that were received by it for its own account pursuant to the exchange offer and any broker or dealer that participates in a distribution of exchange notes may be deemed to be an "underwriter" within the meaning of the Securities Act, and any profit on any such resale of the exchange notes and any commissions or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act. The letter of transmittal states that by acknowledging that it will deliver and by delivering a prospectus a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

By acceptance of this exchange offer, each broker-dealer that receives exchange notes for its own account pursuant to the exchange offer agrees that, upon receipt of notice from us of the happening of any event which makes any statement in this prospectus untrue in any material respect or which requires the making of any changes in this prospectus in order to make the statements herein not misleading (which notice we agree to deliver promptly to such broker-dealer), such broker-dealer will suspend use of this prospectus until we have amended or supplemented this prospectus to correct such misstatement or omissions and have furnished copies of the amended or supplemented prospectus to such broker-dealer. If we give any notice to suspend the use of the prospectus, we will extend the period referred to above by the number of days during the period from and including the date of the giving of the notice to and including the date when broker-dealers shall have received copies of the supplemented or amended prospectus necessary to permit resales of the exchange notes.

LEGAL MATTERS

The validity of the notes offered by this prospectus have been passed upon for us by Richard E. Barry, our Senior Counsel and Assistant Secretary. As of January 28, 2003, Mr. Barry owned 5,117 shares of Aon Corporation common stock, held restricted stock awards of 24,600 shares and 1,980 vested and 24,020 unvested stock options. In addition, approximately 2,682 shares of Aon Corporation common stock held by our employee stock ownership plan and savings plan were attributable to Mr. Barry.

EXPERTS

The consolidated financial statements and the related financial statement schedules (as restated) of Aon Corporation included in Aon Corporation's Annual Report (Form 10-K/A) for the year ended December 31, 2001 have been audited by Ernst & Young LLP, independent auditors, as set forth in their report thereon included therein and incorporated herein by reference. Such consolidated financial statements and schedules are incorporated herein by reference in reliance upon such report given on the authority of such firm as experts in accounting and auditing.

With respect to the unaudited condensed consolidated interim financial information for the three-month periods ended March 31, 2002 and March 31, 2001, the three- and six-month periods ended June 30, 2002 and June 30, 2001, and the three- and nine-month periods ended September 30, 2002 and September 30, 2001, incorporated by reference in this prospectus, Ernst & Young LLP have reported that they have applied limited procedures in accordance with professional standards for a review of such information. However, their separate reports, included in Aon Corporation's Quarterly Reports on Form 10-Q/A for the quarter ended March 31, 2002 and Form 10-Q for the quarters ended June 30, 2002 and September 30, 2002, and incorporated herein by reference, state that they did not audit and they do not express an opinion on that interim financial information. Accordingly, the degree of reliance on their reports on such information should be restricted considering the limited nature of the review procedures applied. The independent auditors are not subject to the liability provisions of Section 11 of the Securities Act for their reports on the unaudited interim financial information because those reports are not a "report" or a "part" of the registration statement prepared or certified by the auditors within the meaning of Sections 7 and 11 of the Securities Act.

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and special reports, proxy statements, and other information with the SEC. You may read and copy any document we file with the SEC at the SEC's Public Reference Room at 450 Fifth Street, N.W., Washington, D.C. 20549. You may obtain further information on the operation of the SEC's Public Reference Room by calling the SEC at 1-800-SEC-0330. Our SEC filings are also available to the public over the Internet at the SEC's Web site at http://www.sec.gov. In addition, you may inspect our SEC filings at the offices of the New York Stock Exchange, 20 Broad Street, New York, New York 10005. You may find additional information about us at our Web site at http://www.aon.com. The information on our Web site is not a part of this prospectus.

The SEC allows us to "incorporate by reference" into this prospectus the information we file with the SEC, which means that we can disclose important information to you by referring you to those documents. Any information referenced this way is considered to be part of this prospectus, and any information that we later file with the SEC will automatically update and supercede this information. We incorporate by reference into this prospectus the following documents that we have previously filed with the SEC and any future filings that we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and before the termination of this offering:

•: Annual Report on Form 10-K for the year ended December 31, 2001, as amended by the Annual Report on Form 10-K/A filed on September 27, 2002;
•: Quarterly Report on Form 10-Q for the quarter ended March 31, 2002, as amended by the Quarterly Report on Form 10-Q/A filed on September 27, 2002;
•: Quarterly Reports on Form 10-Q for the quarters ended June 30, 2002 and September 30, 2002;
•: Current Reports on Form 8-K filed on April 5, 2002, May 30, 2002, August 8, 2002, August 14, 2002 (relating to our press release), October 4, 2002, October 31, 2002, November 4, 2002, November 8, 2002, December 12, 2002, January 9, 2003 and February 20, 2003; and
•: Proxy Statement for the 2002 Annual Meeting of Stockholders filed on March 11, 2002.

This prospectus is part of a registration statement we have filed with the SEC relating to the securities. As permitted by SEC rules, this prospectus does not contain all of the information included in the registration statement and the accompanying exhibits we file with the SEC. You may refer to the registration statement and the exhibits for more information about us and our securities. The registration statement and exhibits are also available through the SEC's Web site.

You may receive a copy of these filings, at no cost, by writing or telephoning us at the following address and phone number:

Aon Corporation
200 East Randolph Street
Chicago, Illinois 60601
Telephone: (312) 381-1000
Attention: Corporate Secretary

Aon Corporation

Offer to Exchange
Up to $225,000,000 Aggregate Principal Amount of
Our 7.375% Senior Notes Due 2012
For Any and All of
the $225,000,000 Aggregate Principal Amount of
Our Outstanding 7.375% Senior Notes Due 2012

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers.

The Registrant was organized under the laws of the State of Delaware and is subject to the Delaware General Corporation Law. Delaware law provides that officers and directors may receive indemnification from their corporations for certain actual or threatened lawsuits. Delaware law sets out the standard of conduct which the officers and directors must meet in order to be indemnified, the parties who are to determine whether the standard has been met and the types of expenditures which will be indemnified. Delaware law further provides that a corporation may purchase indemnification insurance, with such insurance providing indemnification for the officers or directors whether or not the corporation would have the power to indemnify them against such liability under the provisions of Delaware law.

The Registrant's Second Restated Certificate of Incorporation, as amended, provides that the Registrant will indemnify its officers and directors to the fullest extent permitted by Delaware law.

In addition, the Registrant maintains insurance coverage that provides reimbursement within the policy limits for amounts the Registrant is obligated to pay arising out of lawsuits involving officers and directors serving in such capacities in which the damages, judgments, settlements, costs, charges or expenses incurred in connection with the defense of the action, suit or proceeding are reimbursable pursuant to Delaware law and the Registrant's Second Restated Certificate of Incorporation, as amended.

Item 21. Exhibits.

Exhibits marked with an asterisk (*) are incorporated by reference to documents previously filed by the Registrant with the SEC, as indicated. All other documents listed are filed herewith.

Exhibit Number		Description
*3(a)		Second Restated Certificate of Incorporation of the Registrant—incorporated by reference to Exhibit 3(a) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 1991.
*3(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.
*3(c)		Certificate of Amendment of the Registrant's Second Restated Certificate of Incorporation—incorporated by reference to Exhibit 3 to the Registrant's Current Report on Form 8-K filed on May 9, 2000.
*3(d)		Amended By-laws of the Registrant—incorporated by reference to Exhibit 3.2 of the Registrant's Current Report on Form 8-K filed October 4, 2002.
4(a)		Indenture dated as of December 16, 2002 between the Registrant and The Bank of New York, as trustee (including form of note).
4(b)		Registration Rights Agreement dated as of December 16, 2002 between the Registrant and Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc.
5		Opinion of Richard E. Barry, Senior Counsel and Assistant Secretary of the Registrant.

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*12(a)		Statement re: computation of ratios of earnings to fixed charges for each year in the five-year period ended December 31, 2001—incorporated by reference to Exhibit 12(a) to the Registrant's Annual Report on Form 10-K/A for the year ended December 31, 2001.
*12(b)		Statement of computation of ratios of earnings to fixed charges—incorporated by reference to Exhibit 12(a) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002.
15		Letter re: unaudited interim financial statements.
23(a)		Consent of Richard E. Barry (included in Exhibit 5).
23(b)		Consent of Ernst & Young LLP.
24		Powers of Attorney.
25		Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939 of The Bank of New York.
99.1		Letter of Transmittal (including Guidelines For Certification of Taxpayer Identification Number on Substitute Form W-9).
99.2		Notice of Guaranteed Delivery.
99.3		Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
99.4		Form of Letter to Clients.

Item 22. Undertakings.

The undersigned Registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 that is incorporated by reference in the Registration Statement shall be deemed to be a new Registration Statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(5) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions described in Item 20, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

The undersigned Registrant hereby further undertakes (in accordance with the corresponding lettered undertakings in Item 22 of Form S-4):

(b) To respond to requests for information that is incorporated by reference into this prospectus pursuant to Items 4, 10(b), 11, or 13 of this Form, within one business day of receipt of such request, and to send the incorporated documents by first class mail or other equally prompt means. This includes information contained in documents filed subsequent to the effective date of the Registration Statement through the date of responding to the request.

(c) To supply by means of a post-effect amendment all information concerning a transaction, and the company being acquired involved therein, that was not the subject of and included in the Registration Statement when it became effective.

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SIGNATURES

Pursuant to the requirements of the Securities Act, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Chicago, State of Illinois, on March 7, 2003.

	Aon CORPORATION
	By:		/s/ PATRICK G. RYAN Patrick G. Ryan Chairman and Chief Executive Officer

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities indicated on March 7, 2003.

Name		Title
/s/ PATRICK G. RYAN Patrick G. Ryan		Chairman and Chief Executive Officer (Principal Executive Officer)
/s/ HARVEY N. MEDVIN Harvey N. Medvin		Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)
* Edgar D. Jannotta		Director
* Lester B. Knight		Director
* Perry J. Lewis		Director
* R. Eden Martin		Director
* Andrew J. McKenna		Director
* Robert S. Morrison		Director

II-4

* Richard C. Notebaert		Director
* Michael D. O'Halleran		President, Chief Operating Officer and Director
* John W. Rogers, Jr.		Director
* Patrick G. Ryan, Jr.		Director
* George A. Schaefer		Director
* Raymond I. Skilling		Executive Vice President, Chief Counsel and Director
* Carolyn Y. Woo		Director

*By:

/s/ PATRICK G. RYAN

Patrick G. Ryan
Attorney-in-Fact

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EXHIBIT INDEX

*3(a)		Second Restated Certificate of Incorporation of the Registrant—incorporated by reference to Exhibit 3(a) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 1991.
*3(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.
*3(c)		Certificate of Amendment of the Registrant's Second Restated Certificate of Incorporation—incorporated by reference to Exhibit 3 to the Registrant's Current Report on Form 8-K filed on May 9, 2000.
*3(d)		Amended By-laws of the Registrant—incorporated by reference to Exhibit 3.2 of the Registrant's Current Report on Form 8-K filed October 4, 2002.
4(a)		Indenture dated as of December 16, 2002 between the Registrant and The Bank of New York, as trustee (including form of note).
4(b)		Registration Rights Agreement dated as of December 16, 2002 between the Registrant and Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc.
5		Opinion of Richard E. Barry, Senior Counsel and Assistant Secretary of the Registrant.
*12(a)		Statement re: computation of ratios of earnings to fixed charges for each year in the five-year period ended December 31, 2001—incorporated by reference to Exhibit 12(a) to the Registrant's Annual Report on Form 10-K/A for the year ended December 31, 2001.
*12(b)		Statement of computation of ratios of earnings to fixed charges—incorporated by reference to Exhibit 12(a) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002.
15		Letter re: unaudited interim financial statements.
23(a)		Consent of Richard E. Barry (included in Exhibit 5).
23(b)		Consent of Ernst & Young LLP.
24		Powers of Attorney.
25		Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939 of The Bank of New York.
99.1		Letter of Transmittal (including Guidelines For Certification of Taxpayer Identification Number on Substitute Form W-9).
99.2		Notice of Guaranteed Delivery.
99.3		Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
99.4		Form of Letter to Clients.

*: Incorporated by reference to documents previously filed by the Registrant with the SEC, as indicated.

QuickLinks

TABLE OF CONTENTS
SUMMARY
RISK FACTORS
SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS
USE OF PROCEEDS
RATIOS OF EARNINGS TO FIXED CHARGES
THE EXCHANGE OFFER
DESCRIPTION OF THE NOTES
EXCHANGE OFFER AND REGISTRATION RIGHTS
CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
ERISA CONSIDERATIONS
PLAN OF DISTRIBUTION
LEGAL MATTERS
EXPERTS
WHERE YOU CAN FIND MORE INFORMATION
PART II INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers.

Item 21. Exhibits.

Item 22. Undertakings.

SIGNATURES
EXHIBIT INDEX
EX-4.A 3 a2101105zex-4_a.txt EX-4(A) EXHIBIT 4(a) EXECUTION COPY AON CORPORATION, ISSUER AND THE BANK OF NEW YORK, TRUSTEE --------------------- INDENTURE --------------------- DATED AS OF DECEMBER 16, 2002 7.375% SENIOR NOTES DUE 2012 TABLE OF CONTENTS

i SECTION 5.02. Successor Substituted............................................................... 17 ARTICLE SIX DEFAULT AND REMEDIES SECTION 6.01. Events of Default................................................................... 17 SECTION 6.02. Acceleration........................................................................ 18 SECTION 6.03. Other Remedies...................................................................... 19 SECTION 6.04. Waiver of Past Defaults............................................................. 19 SECTION 6.05. Control by Majority................................................................. 19 SECTION 6.06. Payment of Securities on Default; Suit Therefor..................................... 19 SECTION 6.07. Limitation on Suits................................................................. 20 SECTION 6.08. Rights of Holders to Receive Payment................................................ 20 SECTION 6.09. Collection Suit by Trustee.......................................................... 20 SECTION 6.10. Trustee May File Proofs of Claim.................................................... 21 SECTION 6.11. Priorities.......................................................................... 21 SECTION 6.12. Undertaking for Costs............................................................... 21 SECTION 6.13. Restoration of Rights and Remedies.................................................. 22 SECTION 6.14. Rights and Remedies Cumulative...................................................... 22 SECTION 6.15. Delay or Omission Not Waiver........................................................ 22 ARTICLE SEVEN TRUSTEE SECTION 7.01. General............................................................................. 22 SECTION 7.02. Certain Rights of Trustee........................................................... 22 SECTION 7.03. Individual Rights of Trustee........................................................ 24 SECTION 7.04. Trustee's Disclaimer................................................................ 24 SECTION 7.05. Notice of Default................................................................... 24 SECTION 7.06. Reports by Trustee to Holders....................................................... 24 SECTION 7.07. Compensation and Indemnity.......................................................... 24 SECTION 7.08. Replacement of Trustee.............................................................. 25 SECTION 7.09. Successor Trustee by Merger, Etc.................................................... 26 SECTION 7.10. Eligibility......................................................................... 26 SECTION 7.11. Money Held in Trust................................................................. 26 ARTICLE EIGHT DISCHARGE OF INDENTURE SECTION 8.01. Termination of Company's Obligations................................................ 27 SECTION 8.02. Defeasance and Discharge of Indenture............................................... 27 SECTION 8.03. Defeasance of Certain Obligations................................................... 29 SECTION 8.04. Application of Trust Money.......................................................... 30 SECTION 8.05. Repayment to Company................................................................ 30 SECTION 8.06. Reinstatement....................................................................... 30


For this type of account number	Give the SOCIAL SECURITY number of

1.	Individual	The individual
2.	Two or more individuals (joint account)	The actual owner of the account or, if combined funds, the first individual on the account(1)
3.	Custodian account of a minor (Uniform Gift to Minors Act)	The minor(2)
4.	a.	The usual revocable savings trust account (grantor is also trustee)	The grantor-trustee(1)
	b.	So-called trust account that is not a legal or valid trust under state law	The actual owner(1)

For this type of account number	Give the EMPLOYER IDENTIFICATION number of

5.	Sole proprietorship account	The owner(3)
6.	A valid trust, estate or pension trust	Legal entity (Do not furnish the identifying number of the personal representative or trustee unless the legal entity itself is not designated in the account title)(4)
7.	Corporate	The corporation
8.	Association, club, religious, charitable, educational or other tax-exempt organization	The organization
9.	Partnership	The partnership
10.	A broker or registered nominee	The broker or nominee
11.	Account with the Department of Agriculture in the name of a public entity (such as a State or local government, school district or person) that receives agricultural program payments	The public entity

ii ARTICLE NINE AMENDMENTS, SUPPLEMENTS AND WAIVERS SECTION 9.01. Without Consent of Holders.......................................................... 30 SECTION 9.02. With Consent of Holders............................................................. 31 SECTION 9.03. Action by Holders; Record Dates..................................................... 32 SECTION 9.04. Revocation and Effect of Consent.................................................... 33 SECTION 9.05. Notation on or Exchange of Notes.................................................... 33 SECTION 9.06. Trustee to Sign Amendments, Etc..................................................... 33 SECTION 9.07. Conformity with Trust Indenture Act................................................. 33 ARTICLE TEN MEETINGS OF THE HOLDERS SECTION 10.01. Purposes of Meetings................................................................ 34 SECTION 10.02. Call of Meetings by Trustee......................................................... 34 SECTION 10.03. Call of Meetings by Company or Holders.............................................. 34 SECTION 10.04. Qualification for Voting............................................................ 35 SECTION 10.05. Regulations......................................................................... 35 SECTION 10.06. Voting.............................................................................. 35 ARTICLE ELEVEN MISCELLANEOUS SECTION 11.01. Trust Indenture Act of 1939......................................................... 36 SECTION 11.02. Notices............................................................................. 36 SECTION 11.03. Certificate and Opinion as to Conditions Precedent.................................. 37 SECTION 11.04. Statements Required in Certificate or Opinion....................................... 37 SECTION 11.05. Rules by Trustee, Paying Agent or Registrar......................................... 38 SECTION 11.06. Payment Date Other Than a Business Day.............................................. 38 SECTION 11.07. Governing Law....................................................................... 38 SECTION 11.08. No Adverse Interpretation of Other Agreements....................................... 38 SECTION 11.09. No Recourse Against Others.......................................................... 38 SECTION 11.10. Successors.......................................................................... 38 SECTION 11.11. Duplicate Originals................................................................. 38 SECTION 11.12. Separability........................................................................ 38 SECTION 11.13. Table of Contents, Headings, Etc.................................................... 39 SECTION 11.14. Counterparts........................................................................ 39 EXHIBIT A Form of Note........................................................................A-1

iii INDENTURE, dated as of December 16, 2002, between Aon CORPORATION, a Delaware corporation (the "COMPANY"), and THE BANK OF NEW YORK, a New York banking corporation, as trustee (the "TRUSTEE"). RECITALS The Company has duly authorized the execution and delivery of this Indenture to provide for the issuance of the Company's 7.375% Senior Notes due 2012 (the "NOTES") issuable as provided in this Indenture. All things necessary to make this Indenture a valid agreement of the Company, in accordance with its terms, have been done, and the Company has done all things necessary to make the Notes, when executed by the Company and authenticated and delivered by the Trustee hereunder and duly issued by the Company, valid obligations of the Company as hereinafter provided. This Indenture is subject to, and shall be governed by, the provisions of the Trust Indenture Act of 1939, as amended, that are required to be a part of and to govern indentures qualified under the Trust Indenture Act of 1939, as amended. AND THIS INDENTURE FURTHER WITNESSETH For and in consideration of the premises and the purchase of the Notes by the Holders thereof, it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders, as follows. ARTICLE ONE DEFINITIONS AND INCORPORATION BY REFERENCE SECTION 1.01. DEFINITIONS. "AFFILIATE" has the meaning provided in Rule 405 of the Securities Act. "AGENT" means any Registrar, Co-Registrar, Paying Agent or authenticating agent. "AGENT MEMBERS" has the meaning provided in Section 2.07(a). "AUTHORIZED NEWSPAPER" means a newspaper in an official language of the country of publication of general circulation in the place in connection with which the term is used. If it shall be impractical in the opinion of the Trustee to make any publication of any notice required hereby in an Authorized Newspaper, any publication or other notice in lieu thereof which is made or given with the approval of the Trustee shall constitute a sufficient publication of such notice. "BOARD OF DIRECTORS" means the Board of Directors of the Company or any committee of such Board of Directors duly authorized to act under this Indenture. "BOARD RESOLUTION" means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on the date of such certification, and delivered to the Trustee. "BUSINESS DAY" means any day except a Saturday, Sunday or legal holiday on which banking institutions in The City of New York are authorized or required by law, regulation or executive order to close. "COMMISSION" means the Securities and Exchange Commission, as from time to time constituted, created under the Exchange Act or, if at any time after the execution of this instrument such Commission is not existing and performing the duties now assigned to it under the TIA, then the body performing such duties at such time. "COMPANY" means the party named as such in the first paragraph of this Indenture until a successor replaces it pursuant to Article Five of this Indenture and thereafter means the successor. "COMPANY ORDER" means a written request or order signed in the name of the Company (i) by its Chairman, a Vice Chairman, its President or a Vice President and (ii) by its Treasurer, an Assistant Treasurer, its Secretary or an Assistant Secretary and delivered to the Trustee; PROVIDED, HOWEVER, that such written request or order may be signed by any two of the officers or directors listed in clause (i) above in lieu of being signed by one of such officers or directors listed in such clause (i) and one of the officers listed in clause (ii) above. "CORPORATE TRUST OFFICE" means the office of the Trustee at which the corporate trust business of the Trustee shall, at any particular time, be principally administered, which office is, at the date of this Indenture, located at 101 Barclay Street, Floor 8W, New York, New York 10286, Attention: Corporate Trust Department. "DEFAULT" means an event or condition the occurrence of which is, or with the lapse of time or giving of notice or both would be, an Event of Default. "DEPOSITARY" means The Depository Trust Company, its nominees, and their respective successors. "EVENT OF DEFAULT" has the meaning provided in Section 6.01. "EXCHANGE ACT" means the Securities Exchange Act of 1934. "EXCHANGE NOTES" means any securities of the Company containing terms identical to the Notes (except that such Exchange Notes shall be registered under the Securities Act) that are issued and exchanged for the Notes pursuant to the Registration Rights Agreement and this Indenture. "GLOBAL NOTES" has the meaning provided in Section 2.01. "HOLDER" or "NOTEHOLDER" means the registered holder of any Note. 2 "INDENTURE" means this Indenture as originally executed or as it may be amended or supplemented from time to time by one or more indentures supplemental to this Indenture entered into pursuant to the applicable provisions of this Indenture. "INTEREST PAYMENT DATE" means June 14 and December 14 of each year, commencing June 14, 2003. "MATURITY DATE" means December 14, 2012. "NOTES" means any of the securities, as defined in the first paragraph of the recitals hereof, that are authenticated and delivered under this Indenture. For all purposes of this Indenture, the term "Notes" shall include the Notes initially issued on the Closing Date, any Exchange Notes to be issued and exchanged for any Notes pursuant to the Registration Rights Agreement and this Indenture and any other Notes issued after the Closing Date under this Indenture. For purposes of this Indenture, all Notes shall vote together as one series of Notes under this Indenture. "OFFICER" means, with respect to the Company, (i) the Chairman of the Board, the Chief Executive Officer, the President, any Vice President or the Chief Financial Officer, and (ii) the Treasurer or any Assistant Treasurer, or the Secretary or any Assistant Secretary. "OFFICERS' CERTIFICATE" means a certificate signed by one Officer listed in clause (i) of the definition thereof and one Officer listed in clause (ii) of the definition thereof or two officers listed in clause (i) of the definition thereof. Each Officers' Certificate (other than certificates provided pursuant to TIA Section 314(a)(4)) shall include the statements provided for in TIA Section 314(e). "OPINION OF COUNSEL" means a written opinion signed by legal counsel, who may be an employee of or counsel to the Company, that meets the requirements of Section 11.04 hereof. Each such Opinion of Counsel shall include the statements provided for in TIA Section 314(e). "PAYING AGENT" has the meaning provided in Section 2.04, except that, for the purposes of Article Eight, the Paying Agent shall not be the Company or a Subsidiary of the Company or an Affiliate of any of them. The term "Paying Agent" includes any additional Paying Agent. "PERSON" means an individual, a corporation, a partnership, a limited liability company, an association, a trust or any other entity or organization, including a government or political subdivision or an agency or instrumentality thereof. "PHYSICAL NOTES" means the Notes issued in the form of permanent certificated Notes in registered form. "PRINCIPAL" of a debt security, including the Notes, means the principal amount due on the Stated Maturity as shown on such debt security. "PRIVATE PLACEMENT LEGEND" means the legend initially set forth on the Notes in the form set forth in Section 2.02. 3 "QIB" means a "qualified institutional buyer" as defined in Rule 144A. "RECORD DATE" for the interest payable on any Interest Payment Date means the fifteenth calendar day (whether or not a Business Day) immediately preceding such Interest Payment Date. "REGISTRAR" has the meaning provided in Section 2.04. "REGISTRATION RIGHTS AGREEMENT" means the Registration Rights Agreement, dated as of December 16, 2002, between the Company and Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc. "REGISTRATION STATEMENT" means the Registration Statement as defined and described in the Registration Rights Agreement. "RESPONSIBLE OFFICER," when used with respect to the Trustee, means any officer within the corporate trust department of the trustee, including any vice president, any assistant vice president, any assistant treasurer, any trust officer or assistant trust officer or any other officer of the Trustee in its corporate trust department customarily performing functions similar to those performed by any of the above-designated officers and also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his or her knowledge of and familiarity with the particular subject. "RULE 144" means Rule 144 under the Securities Act. "RULE 144A" means Rule 144A under the Securities Act. "SECURITIES ACT" means the Securities Act of 1933. "SECURITY REGISTER" has the meaning provided in Section 2.04. "SHELF REGISTRATION STATEMENT" means the Shelf Registration Statement as defined in the Registration Rights Agreement. "SIGNIFICANT SUBSIDIARY" means, with respect to the Company, a "significant subsidiary" as defined in Rule 1-02(w) of Regulation S-X under the Exchange Act. "STATED MATURITY" means the date specified in the Notes as the fixed date on which the principal amount thereof or any installment of interest thereon is due and payable. "SUBSIDIARY" means, with respect to any Person, (i) any corporation of which at least a majority in interest of the outstanding capital stock having by the terms thereof voting power under ordinary circumstances to elect directors of such corporation, irrespective of whether or not at the time stock of any other class or classes of such corporation shall have or might have voting power by reason of the happening of any contingency, is at the time, directly or indirectly, owned or controlled by such Person, or by one or more other corporations a majority in interest of such stock of which is similarly owned or controlled or by such Person and one or more other corporations a majority in interest of such stock of which is similarly owned or controlled, or (ii) 4 any other Person (other than a corporation) in which such Person, directly or indirectly, at the date of determination thereof, has at least a majority equity ownership interest. "TIA" or "TRUST INDENTURE ACT" means the Trust Indenture Act of 1939 (15 U.S. Code Sections 77aaa-77bbbb), as in effect on the date this Indenture was executed, except as provided in Section 9.07. "TRUSTEE" means the party named as such in the first paragraph of this Indenture until a successor replaces it in accordance with the provisions of Article Seven of this Indenture and thereafter means such successor. "UNITED STATES BANKRUPTCY CODE" means the Bankruptcy Reform Act of 1978, as amended and as codified in Title 11 of the United States Code, as amended from time to time hereafter, or any successor federal bankruptcy law. "U.S. GOVERNMENT OBLIGATIONS" means securities that are (i) direct obligations of the United States of America for the payment of which its full faith and credit is pledged or (ii) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America the payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America, which, in either case, are not callable or redeemable at the option of the issuer thereof at any time prior to the Stated Maturity of the Notes, and shall also include a depository receipt issued by a bank or trust company as custodian with respect to any such U.S. Government Obligation or a specific payment of interest on or principal of any such U.S. Government Obligation held by such custodian for the account of the holder of a depository receipt; PROVIDED that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depository receipt from any amount received by the custodian in respect of the U.S. Government Obligation or the specific payment of interest on or principal of the U.S. Government Obligation evidenced by such depository receipt. SECTION 1.02. INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT. Whenever this Indenture refers to a provision of the TIA, the provision is incorporated by reference in and made a part of this Indenture. The following TIA terms used in this Indenture have the following meanings: "indenture securities" means the Notes; "indenture security holder" means a Holder or a Noteholder; "indenture to be qualified" means this Indenture; "indenture trustee" or "institutional trustee" means the Trustee; and "obligor" on the indenture securities means the Company or any other obligor on the Notes. 5 All other TIA terms used in this Indenture that are defined by the TIA, defined by TIA reference to another statute or defined by a rule of the Commission and not otherwise defined herein have the meanings assigned to them therein. SECTION 1.03. RULES OF CONSTRUCTION. Unless the context otherwise requires: (i) a term has the meaning assigned to it; (ii) an accounting term not otherwise defined has the meaning assigned to it in accordance with accounting principles generally accepted in the United States in effect on the date of this Indenture; (iii) "or" is not exclusive; (iv) words in the singular include the plural, and words in the plural include the singular; (v) provisions apply to successive events and transactions; (vi) "herein," "hereof" and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section or other subdivision; and (vii) all references to Sections or Articles refer to Sections or Articles of this Indenture unless otherwise indicated. ARTICLE TWO THE NOTES SECTION 2.01. FORM AND DATING. The Notes and the Trustee's certificate of authentication shall be substantially in the form annexed hereto as Exhibit A with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture. The Notes may have notations, legends or endorsements required by law, stock exchange agreements to which the Company is subject or usage. The Company shall approve the form of the Notes and any notation, legend or endorsement on the Notes. Each Note shall be dated the date of its authentication. The terms and provisions contained in the form of the Notes annexed hereto as Exhibit A shall constitute, and are hereby expressly made, a part of this Indenture. To the extent applicable, the Company and the Trustee, by their execution and delivery of this Indenture, expressly agree to such terms and provisions and to be bound thereby. Notes offered and sold in reliance on Rule 144A shall be issued initially in the form of one or more permanent global Notes in registered form, substantially in the form set forth in Exhibit A (the "GLOBAL NOTES"), registered in the name of the nominee of the Depositary, deposited with the Trustee, as custodian for the Depositary, duly executed by the Company and authenticated by the Trustee as hereinafter provided. The aggregate principal amount of the 6 Global Notes may from time to time be increased or decreased by adjustments made on the records of the Trustee, as custodian for the Depositary or its nominee, in accordance with the instructions given by the Holder thereof, as hereinafter provided. The definitive Notes shall be typed, printed, lithographed or engraved or produced by any combination of these methods or may be produced in any other manner permitted by the rules of any securities exchange on which the Notes may be listed, all as determined by the Officers executing such Notes, as evidenced by their execution of such Notes. SECTION 2.02. RESTRICTIVE LEGENDS. Unless and until a Note is exchanged for an Exchange Note or sold in connection with an effective Registration Statement pursuant to the Registration Rights Agreement, the Global Notes and any Physical Notes issued in exchange therefor shall bear the legend set forth below on the face thereof. THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT); (2) AGREES THAT IT WILL NOT, WITHIN THE TIME PERIOD REFERRED TO UNDER RULE 144(k) UNDER THE SECURITIES ACT AS IN EFFECT ON THE DATE OF TRANSFER OF THIS NOTE, RESELL OR OTHERWISE TRANSFER THIS NOTE EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (D) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS NOTE IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS NOTE WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO THE TRUSTEE. THE INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE FOREGOING RESTRICTIONS. Each Global Note, whether or not an Exchange Note, shall also bear the following legend on the face thereof: UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER ENTITY AS IS REQUESTED BY AN 7 AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE AND IS REGISTERED IN THE NAME OF CEDE & CO. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFERS OF THIS GLOBAL NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN NOMINEES OF CEDE & CO. OR A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN SECTION 2.08 OF THE INDENTURE. SECTION 2.03. EXECUTION, AUTHENTICATION AND DENOMINATIONS. Subject to Article Four and applicable law, the aggregate principal amount of Notes which may be authenticated and delivered under this Indenture is unlimited. The Notes shall be executed by two Officers of the Company. The signature of these Officers on the Notes may be by facsimile or manual signature in the name and on behalf of the Company. If an Officer whose signature is on a Note no longer holds that office at the time the Trustee or authenticating agent authenticates the Note, the Note shall be valid nevertheless. A Note shall not be valid until the Trustee or authenticating agent manually signs the certificate of authentication on the Note. The signature shall be conclusive evidence that the Note has been authenticated under this Indenture. At any time and from time to time after the execution of this Indenture, the Trustee or an authenticating agent shall upon receipt of a Company Order authenticate for original issue Notes in the aggregate principal amount specified in such Company Order; PROVIDED that the Trustee shall be entitled to receive an Officers' Certificate and an Opinion of Counsel of the Company in connection with such authentication of Notes. Such Company Order shall specify the amount of Notes to be authenticated and the date on which the original issue of Notes is to be authenticated and, in case of an issuance of Notes pursuant to Section 2.14, shall certify that such issuance is in compliance with Article Four. The Trustee may appoint an authenticating agent to authenticate Notes. An authenticating agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such authenticating agent. An authenticating agent has the same rights as an Agent to deal with the Company or an Affiliate of the Company. 8 The Notes shall be issuable only in registered form without coupons and only in denominations of $1,000 in principal amount and any integral multiple thereof. SECTION 2.04. REGISTRAR AND PAYING AGENT. The Company shall maintain an office or agency where Notes may be presented for registration of transfer or for exchange (the "REGISTRAR"), an office or agency where Notes may be presented for payment (the "PAYING AGENT") and an office or agency where notices and demands to or upon the Company in respect of the Notes and this Indenture may be served, which shall be in the Borough of Manhattan, The City of New York. The Company shall cause the Registrar to keep a register of the Notes and of their transfer and exchange (the "SECURITY REGISTER"). The Security Register shall be in written form or any other form capable of being converted into written form within a reasonable time. The Company may have one or more Co-Registrars and one or more additional Paying Agents. The Company shall enter into an appropriate agency agreement with any Agent not a party to this Indenture. The agreement shall implement the provisions of this Indenture that relate to such Agent. The Company shall give prompt written notice to the Trustee of the name and address of any such Agent and any change in the address of such Agent. If the Company fails to maintain a Registrar, Paying Agent and/or agent for service of notices and demands, the Trustee shall act as such Registrar, Paying Agent and/or agent for service of notices and demands. The Company may remove any Agent upon written notice to such Agent and the Trustee; PROVIDED that no such removal shall become effective until (i) the acceptance of an appointment by a successor Agent to such Agent as evidenced by an appropriate agency agreement entered into by the Company and such successor Agent and delivered to the Trustee or (ii) notification to the Trustee that the Trustee shall serve as such Agent until the appointment of a successor Agent in accordance with clause (i) of this proviso. The Company, any Subsidiary of the Company or any Affiliate of any of them may act as Paying Agent, Registrar or Co-Registrar, and/or agent for service of notice and demands. The Company initially appoints the Trustee as Registrar, Paying Agent, authenticating agent and agent for service of notice and demands. The Trustee shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of Holders and shall otherwise comply with TIA Section 312(a). If the Trustee is not the Registrar, the Company shall furnish to the Trustee as of each Record Date and at such other times as the Trustee may reasonably request the names and addresses of Holders as they appear in the Security Register, including the aggregate principal amount of Notes held by each Holder. SECTION 2.05. PAYING AGENT TO HOLD MONEY IN TRUST. Not later than 10:00 a.m. (New York City time) on each due date of any principal of or interest on any Notes, the Company shall deposit with the Paying Agent money in immediately available funds sufficient to pay such principal and interest so becoming due. The Company shall require each Paying Agent other than the Trustee to agree in writing that such Paying Agent shall hold in trust for the benefit of the Holders or the Trustee all money held by the Paying Agent for the payment of principal of and interest on the Notes (whether such money has been paid to it by the Company or any other obligor on the Notes), and such Paying Agent shall promptly notify the Trustee of any default by the Company (or any other obligor on the Notes) in making any such payment. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee and account for any funds disbursed, and the Trustee may at any time during the continuance of any payment 9 default, upon written request to a Paying Agent, require such Paying Agent to pay all money held by it to the Trustee and to account for any funds disbursed. Upon doing so, the Paying Agent shall have no further liability for the money so paid over to the Trustee. If the Company or any Subsidiary of the Company or any Affiliate of any of them acts as Paying Agent, it will, on or before each due date of any principal of or interest on the Notes, segregate and hold in a separate trust fund for the benefit of the Holders a sum of money sufficient to pay such principal or interest so becoming due until such sum of money shall be paid to such Holders or otherwise disposed of as provided in this Indenture, and will promptly notify the Trustee of its action or failure to act. SECTION 2.06. TRANSFER AND EXCHANGE. The Notes are issuable only in registered form. A Holder may transfer a Note only by written application to the Registrar stating the name of the proposed transferee and otherwise complying with the terms of this Indenture. No such transfer shall be effected until, and such transferee shall succeed to the rights of a Holder only upon, final acceptance and registration of the transfer by the Registrar in the Security Register. Prior to the registration of any transfer by a Holder as provided herein, the Company, the Trustee and any agent of the Company shall treat the person in whose name the Note is registered as the owner thereof for all purposes whether or not the Note shall be overdue, and none of the Company, the Trustee or any such agent shall be affected by notice to the contrary. Furthermore, any Holder of a Global Note shall, by acceptance of such Global Note, agree that transfers of beneficial interests in such Global Note may be effected only through a book entry system maintained by the Holder of such Global Note (or its agent) and that ownership of a beneficial interest in the Note shall be required to be reflected in a book entry. When Notes are presented to the Registrar or a Co-Registrar with a request to register the transfer or to exchange them for an equal principal amount of Notes of other authorized denominations (including an exchange of Notes for Exchange Notes), the Registrar shall register the transfer or make the exchange as requested if its requirements for such transactions are met (including that such Notes are duly endorsed or accompanied by a written instrument of transfer in form satisfactory to the Trustee and Registrar duly executed by the Holder thereof or by an attorney who is authorized in writing to act on behalf of the Holder); PROVIDED that no exchanges of Notes for Exchange Notes shall occur until a Registration Statement shall have been declared effective by the Commission and that any Notes that are exchanged for Exchange Notes shall be cancelled by the Trustee. To permit registrations of transfers and exchanges, the Company shall execute and the Trustee shall authenticate Notes at the Registrar's request. No service charge shall be made for any registration of transfer or exchange of the Notes, but the Company may require payment of a sum sufficient to cover any transfer tax or similar governmental charge payable in connection therewith (other than any such transfer taxes or other similar governmental charge payable upon exchanges pursuant to Section 2.11 or 9.05). SECTION 2.07. BOOK-ENTRY PROVISIONS FOR GLOBAL NOTES. (a) The Global Notes initially shall (i) be registered in the name of the Depositary for such Global Notes or the nominee of such Depositary, (ii) be delivered to the Trustee as custodian for such Depositary and (iii) bear legends as set forth in Section 2.02. Members of, or participants in, the Depositary ("AGENT MEMBERS") shall have no rights under this Indenture with respect to any Global Note held on their behalf by the Depositary, or 10 the Trustee as its custodian, or under such Global Note, and the Depositary may be treated by the Company, the Trustee and any agent of the Company or the Trustee as the absolute owner of such Global Note for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Company, the Trustee or any agent of the Company or the Trustee, from giving effect to any written certification, proxy or other authorization furnished by the Depositary or impair, as between the Depositary and its Agent Members, the operation of customary practices governing the exercise of the rights of a holder of any Note. (b) Transfers of a Global Note shall be limited to transfers of such Global Note in whole, but not in part, to the Depositary, its successors or their respective nominees. Interests of beneficial owners in Global Notes may be transferred in accordance with the rules and procedures of the Depositary and the provisions of Section 2.08. In addition, Physical Notes shall be transferred to all beneficial owners in exchange for their beneficial interests in the Global Notes if (i) the Depositary notifies the Company that it is unwilling or unable to continue as Depositary for the Global Notes and a successor depositary is not appointed by the Company within 90 days of such notice, (ii) an Event of Default has occurred and is continuing and the Registrar has received a request from the Depositary or (iii) in accordance with the rules and procedures of the Depositary and the provisions of Section 2.08. (c) In connection with any transfer of a portion of the beneficial interests in a Global Note to beneficial owners pursuant to paragraph (b) of this Section 2.07, the Registrar shall reflect on its books and records the date and a decrease in the principal amount of such Global Note in an amount equal to the principal amount of the beneficial interest in such Global Note to be transferred, and the Company shall execute, and the Trustee shall authenticate and deliver, one or more Physical Notes of like tenor and amount. (d) In connection with the transfer of the Global Notes, in whole, to beneficial owners pursuant to paragraph (b) of this Section 2.07, the Global Notes shall be deemed to be surrendered to the Trustee for cancellation, and the Company shall execute, and the Trustee shall authenticate and deliver, to each beneficial owner identified by the Depositary in exchange for its beneficial interest in the Global Notes an equal aggregate principal amount of Physical Notes of authorized denominations. (e) Any Physical Note delivered in exchange for an interest in the Global Notes pursuant to paragraph (b), (c) or (d) of this Section 2.07 shall, except as otherwise provided by paragraph (h) of Section 2.08, bear the legend regarding transfer restrictions applicable to the Physical Note set forth in Section 2.02. (f) The registered holder of a Global Note may grant proxies and otherwise authorize any person, including Agent Members and persons that may hold interests through Agent Members, to take any action which a Holder is entitled to take under this Indenture or the Notes. SECTION 2.08. SPECIAL TRANSFER PROVISIONS. Unless and until a Note is exchanged for an Exchange Note or sold in connection with an effective Registration Statement pursuant to the Registration Rights Agreement, the following provisions shall apply: 11 (a) TRANSFERS TO QIBS. The following provisions shall apply with respect to the registration of any proposed transfer of a Note to a QIB: (i) If the Note to be transferred consists of (x) Physical Notes, the Registrar shall register the transfer if such transfer is being made by a proposed transferor who has checked the box provided for on the form of Note stating, or has otherwise advised the Company and the Registrar in writing, that the sale has been made in compliance with the provisions of Rule 144A to a transferee who has signed the certification provided for on the form of Note stating, or has otherwise advised the Company and the Registrar in writing, that it is purchasing the Note for its own account or an account with respect to which it exercises sole investment discretion and that it and any such account is a QIB within the meaning of Rule 144A and is aware that the sale to it is being made in reliance on Rule 144A and acknowledges that it has received such information regarding the Company as it has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon its foregoing representations in order to claim the exemption from registration provided by Rule 144A or (y) an interest in the Global Notes, the transfer of such interest may be effected only through the book-entry system maintained by the Depositary. (ii) If the proposed transferee is an Agent Member, and the Note to be transferred consists of Physical Notes, upon receipt by the Registrar of the documents referred to in paragraph (i) above and instructions given in accordance with the Depositary's and the Registrar's procedures, the Registrar shall reflect on its books and records the date and an increase in the principal amount of Global Notes in an amount equal to the principal amount of the Physical Notes to be transferred, and the Trustee shall cancel the Physical Notes so transferred. (b) PRIVATE PLACEMENT LEGEND. Upon the transfer, exchange or replacement of Notes not bearing the Private Placement Legend, the Registrar shall deliver Notes that do not bear the Private Placement Legend. Upon the transfer, exchange or replacement of Notes bearing the Private Placement Legend, the Registrar shall deliver only Notes that bear the Private Placement Legend unless (i) the Private Placement Legend is no longer required by Section 2.02 or (ii) there is delivered to the Registrar an Opinion of Counsel reasonably satisfactory to the Company and the Trustee to the effect that neither such legend nor the related restrictions on transfer are required in order to maintain compliance with the provisions of the Securities Act. (c) GENERAL. By its acceptance of any Note bearing the Private Placement Legend, each Holder of such a Note acknowledges the restrictions on transfer of such Note set forth in this Indenture and in the Private Placement Legend and agrees that it will transfer such Note only as provided in this Indenture. The Registrar shall not register a transfer of any Note unless such transfer complies with the restrictions on transfer of such Note set forth in this Indenture. In connection with any transfer of Notes, each Holder agrees by its acceptance of the Notes to furnish the Registrar or the Company such certifications, legal opinions or other information as either of them may reasonably 12 require to confirm that such transfer is being made pursuant to an exemption from, or a transaction not subject to, the registration requirements of the Securities Act; PROVIDED that the Registrar shall not be required to determine (but may rely on a determination made by the Company with respect to) the sufficiency of any such certifications, legal opinions or other information. The Registrar shall retain copies of all letters, notices and other written communications received pursuant to Section 2.07 or this Section 2.08. The Company shall have the right to inspect and make copies of all such letters, notices or other written communications at any reasonable time upon the giving of reasonable written notice to the Registrar. SECTION 2.09. REPLACEMENT NOTES. If a mutilated Note is surrendered to the Trustee or if the Holder claims that the Note has been lost, destroyed or wrongfully taken, then, in the absence of notice to the Company or the Trustee that such Note has been acquired by a BONA FIDE purchaser, the Company shall issue and the Trustee shall authenticate a replacement Note of like tenor and principal amount and bearing a number not contemporaneously outstanding; PROVIDED that the requirements of this Section 2.09 are met. If required by the Trustee or the Company, an indemnity bond must be furnished that is sufficient in the judgment of both the Trustee and the Company to protect the Company, the Trustee or any Agent from any loss that any of them may suffer if a Note is replaced. The Company may charge such Holder for its expenses and the expenses of the Trustee in replacing a Note. In case any such mutilated, lost, destroyed or wrongfully taken Note has become or is about to become due and payable, the Company in its discretion may pay such Note instead of issuing a new Note in replacement thereof. Every replacement Note is an additional obligation of the Company and shall be entitled to the benefits of this Indenture. SECTION 2.10. OUTSTANDING NOTES. Notes outstanding at any time are all Notes that have been authenticated by the Trustee except for those cancelled by it, those delivered to it for cancellation and those described in this Section 2.10 as not outstanding. If a Note is replaced pursuant to Section 2.09, it ceases to be outstanding unless and until the Trustee and the Company receive proof satisfactory to them that the replaced Note is held by a BONA FIDE purchaser. If the Paying Agent (other than the Company or an Affiliate of the Company) holds on the Maturity Date money sufficient to pay Notes payable on that date, then on and after that date such Notes cease to be outstanding and interest on them shall cease to accrue. A Note does not cease to be outstanding because the Company or one of its Affiliates holds such Note, PROVIDED, HOWEVER, that in determining whether the Holders of the requisite principal amount of the outstanding Notes have given any request, demand, authorization, direction, notice, consent or waiver hereunder, Notes owned by the Company or any other obligor upon the Notes or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not to be outstanding, except that, in determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Notes which a Responsible Officer of the Trustee has actual knowledge 13 to be so owned shall be so disregarded. Notes so owned which have been pledged in good faith may be regarded as outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee's right so to act with respect to such Notes and that the pledgee is not the Company or any other obligor upon the Notes or any Affiliate of the Company or of such other obligor. SECTION 2.11. TEMPORARY NOTES. Until definitive Notes are ready for delivery, the Company may prepare and execute and the Trustee shall authenticate temporary Notes. Temporary Notes shall be substantially in the form of definitive Notes but may have insertions, substitutions, omissions and other variations determined to be appropriate by the Officers executing the temporary Notes, as evidenced by their execution of such temporary Notes. If temporary Notes are issued, the Company will cause definitive Notes to be prepared without unreasonable delay. After the preparation of definitive Notes, the temporary Notes shall be exchangeable for definitive Notes upon surrender of the temporary Notes at the office or agency of the Company designated for such purpose pursuant to Section 4.02, without charge to the Holder. Upon surrender for cancellation of any one or more temporary Notes the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a like principal amount of definitive Notes of authorized denominations. Until so exchanged, the temporary Notes shall be entitled to the same benefits under this Indenture as definitive Notes. SECTION 2.12. CANCELLATION. The Company at any time may deliver to the Trustee for cancellation any Notes previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever, and may deliver to the Trustee for cancellation any Notes previously authenticated hereunder which the Company has not issued and sold. The Registrar and the Paying Agent shall forward to the Trustee any Notes surrendered to them for transfer, exchange or payment. The Trustee shall cancel all Notes surrendered for transfer, exchange, payment or cancellation and shall dispose of them in accordance with its normal procedure. SECTION 2.13. CUSIP NUMBERS. The Company in issuing the Notes may use "CUSIP", "CINS" or "ISIN" numbers (if then generally in use), and the Company and the Trustee shall use CUSIP, CINS or ISIN numbers, as the case may be, in notices of exchange as a convenience to Holders; PROVIDED that any such notice shall state that no representation is made as to the correctness of such numbers either as printed on the Notes or as contained in any notice of exchange and that reliance may be placed only on the other identification numbers printed on the Notes. The Company shall promptly notify the Trustee of any change in "CUSIP", "CINS" or "ISIN" numbers for the Notes. SECTION 2.14. ISSUANCE OF ADDITIONAL NOTES. The Company may, subject to Article Four of this Indenture and applicable law, issue additional Notes under this Indenture. The Notes issued on the Closing Date and any additional Notes subsequently issued shall be treated as a single class for all purposes under this Indenture. 14 ARTICLE THREE REDEMPTION SECTION 3.01. RIGHT OF REDEMPTION. The Notes are not redeemable prior to the Maturity Date. ARTICLE FOUR COVENANTS SECTION 4.01. PAYMENT OF NOTES. The Company shall pay the principal of and interest on the Notes on the dates and in the manner provided in the Notes and this Indenture. An installment of principal or interest shall be considered paid on the date due if the Trustee or Paying Agent (other than the Company, a Subsidiary of the Company or any Affiliate of any of them) holds on that date money designated for and sufficient to pay the installment. If the Company or any Subsidiary of the Company or any Affiliate of any of them acts as Paying Agent, an installment of principal or interest shall be considered paid on the due date if the entity acting as Paying Agent complies with the last sentence of Section 2.05. As provided in Section 6.10, upon any bankruptcy or reorganization procedure relative to the Company, the Trustee shall serve as the Paying Agent, if any, for the Notes. SECTION 4.02. MAINTENANCE OF OFFICE OR AGENCY. So long as any of the Notes shall remain outstanding, the Company will maintain in the Borough of Manhattan, The City of New York an office or agency where Notes may be surrendered for registration of transfer or exchange or for presentation for payment and where notices and demands to or upon the Company in respect of the Notes and this Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the address of the Trustee set forth in Section 11.02. The Company may also from time to time designate one or more other offices or agencies where the Notes may be presented or surrendered for any or all such purposes and may from time to time rescind such designations; PROVIDED that no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency in the Borough of Manhattan, The City of New York for such purposes. The Company shall give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or agency. The Company hereby initially designates the Corporate Trust Office of the Trustee as such office of the Company in accordance with Section 2.04. SECTION 4.03. LIMITATION ON LIENS ON COMMON STOCK OF SIGNIFICANT SUBSIDIARY. So long as any of the Notes shall remain outstanding, the Company will not, directly or indirectly, create, issue, assume, incur or guarantee any indebtedness for money borrowed which is secured 15 by a mortgage, pledge, lien, security interest or other encumbrance of any nature on any of the present or future common stock of any Significant Subsidiary (or any company, other than the Company, having direct or indirect control of any Significant Subsidiary), which common stock is directly or indirectly owned by the Company, unless the Notes (together with, if the Company so determines, any other indebtedness for money borrowed of the Company then existing or thereafter created which is not subordinate to the Notes) shall be secured equally and ratably with (or, at the option of the Company, prior to) such other secured indebtedness for money borrowed so long as such indebtedness shall be secured. SECTION 4.04. COMPLIANCE CERTIFICATES. The Company shall deliver to the Trustee on or before a date not more than four months after the end of each fiscal year of the Company ending after the date hereof, an Officers' Certificate signed by the Company's chief financial officer, principal executive officer or principal accounting officer stating whether or not the signers have knowledge of any Default or Event of Default. If any of the Officers of the Company signing such certificate has knowledge of such a Default or Event of Default, the Officers' Certificate shall describe any such Default or Event of Default and the nature thereof. SECTION 4.05. WAIVER OF CERTAIN COVENANTS. The Company may omit in any particular instance to comply with any term, provision or condition set forth in Section 4.03 if before the time for such compliance the Holders of at least a majority in aggregate principal amount of the Notes shall, by action of such Holders, either waive such compliance in such instance or generally waive compliance with such term, provision or condition, but no such waiver shall extend to or affect such term, provision or condition, except to the extent so expressly waived, and, until such waiver shall become effective, the obligations of the Company and the duties of the Trustee in respect of any such term, provision or condition shall remain in full force and effect. ARTICLE FIVE SUCCESSOR CORPORATION SECTION 5.01. WHEN COMPANY MAY MERGE, ETC. So long as any Notes shall be outstanding, the Company shall not consolidate with or merge into any other Person or sell, convey, transfer or lease its properties and assets substantially as an entirety to any Person unless: (a) the corporation formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or transfer, or which leases, the properties and assets of the Company substantially as an entirety shall be a corporation organized and existing under the laws of the United States of America, any State thereof or the District of Columbia and shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, the due and punctual payment of the principal of and interest on the Notes and the performance of every covenant of this Indenture on the part of the Company to be performed or observed; 16 (b) immediately after giving effect to such transaction and treating any indebtedness which becomes an obligation of the Company as a result of such transaction as having been incurred by the Company at the time of such transaction, no Event of Default, and no event which, after notice or lapse of time or both, would become an Event of Default, shall have happened and be continuing; (c) if, as a result of any such consolidation or merger or such sale, conveyance, transfer, lease or other disposition, properties or assets of the Company would become subject to a mortgage, pledge, lien, security interest or other encumbrance of any nature which would not be permitted by this Indenture, the Company or such successor corporation or such Person, firm or corporation, as the case may be, shall take such steps as shall be necessary effectively to secure the Notes (together with, if the Company so determines, any other indebtedness for money borrowed of the Company then existing or thereafter created which is not subordinate to the Notes) equally and ratably with (or, at the option of the Company, prior to) all indebtedness secured thereby; and (d) the Company has delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, each stating that such consolidation, merger, sale, conveyance, transfer, lease or other disposition and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture comply with this Article Five and that all conditions precedent herein provided for relating to such transaction have been complied with. SECTION 5.02. SUCCESSOR SUBSTITUTED. Upon any consolidation or merger, or any sale, conveyance, transfer, lease or other disposition of all or substantially all of the property and assets of the Company in accordance with Section 5.01 of this Indenture, the successor Person formed by such consolidation or into which the Company is merged or to which such sale, conveyance, transfer, lease or other disposition is made shall succeed to, and be substituted for, and may exercise every right and power of, the Company under this Indenture with the same effect as if such successor Person had been named as the Company herein; PROVIDED that the Company shall not be released from its obligation to pay the principal of or interest on the Notes in the case of a lease of all or substantially all of its property and assets. ARTICLE SIX DEFAULT AND REMEDIES SECTION 6.01. EVENTS OF DEFAULT. Any of the following events shall constitute an "EVENT OF DEFAULT" hereunder: (a) default in the payment of the principal of any of the Notes as and when the same shall become due and payable either at maturity, by declaration or otherwise; or (b) default in the payment of any installment of interest on any of the Notes as and when the same shall become due and payable, and continuance of such default for a period of 30 days; or 17 (c) failure on the part of the Company duly to observe or perform any other of the covenants or agreements on the part of the Company in this Indenture applicable to the Notes for a period of 90 days after the date on which written notice of such failure, specifying such failure and requiring the Company to remedy the same and stating that such notice is a "Notice of Default" hereunder, shall have been given to the Company by the Trustee, or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of the Notes at the time outstanding; or (d) a court having jurisdiction in the premises shall enter a decree or order for relief in respect of the Company in an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or appointing a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of the Company or for any substantial part of its property, or ordering the winding-up or liquidation of its affairs and such decree or order shall remain unstayed and in effect for a period of 90 days; or (e) the Company shall commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or shall consent to the entry of any order for relief in an involuntary case under any such law, or shall consent to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or similar official) of the Company or for any substantial part of its property, or shall make any general assignment for the benefit of creditors. SECTION 6.02. ACCELERATION. If an Event of Default (other than an Event of Default specified in clause (d) or (e) of Section 6.01 that occurs with respect to the Company) occurs and is continuing under this Indenture, the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding, by written notice to the Company (and to the Trustee if such notice is given by the Holders), may, and the Trustee at the request of such Holders shall, declare the principal of and accrued and unpaid interest on all the Notes to be immediately due and payable, any provision of this Indenture or the Notes to the contrary notwithstanding. Upon a declaration of acceleration, such principal and accrued and unpaid interest shall be immediately due and payable. In the event of a declaration of acceleration because an Event of Default set forth in clause (c) of Section 6.01 has occurred and is continuing, such declaration of acceleration shall be automatically rescinded and annulled if the event of default triggering such Event of Default pursuant to clause (c) shall be remedied or cured by the Company or waived by the Holders within 60 days after the declaration of acceleration with respect thereto. If an Event of Default specified in clause (d) or (e) of Section 6.01 occurs with respect to the Company, the principal and accrued and unpaid interest on the Notes then outstanding shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holder. At any time after such declaration of acceleration, but before a judgment or decree for the payment of the money due has been obtained by the Trustee, the Holders of at least a majority in principal amount of the outstanding Notes by written notice to the Company and to the Trustee, may waive all past Defaults and rescind and annul a declaration of acceleration and its consequences if (a) the Company has paid or deposited with the Trustee a sum sufficient to pay (i) all sums paid or advanced by the Trustee hereunder and the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, (ii) all overdue 18 interest on all Notes, and (iii) the principal of any Notes that have become due otherwise than by such declaration or occurrence of acceleration and interest thereon at the rate prescribed therefor by such Notes, (b) all existing Events of Default, other than the non-payment of the principal of and accrued and unpaid interest on the Notes that have become due solely by such declaration of acceleration, have been cured or waived and (c) the rescission would not conflict with any judgment or decree of a court of competent jurisdiction. SECTION 6.03. OTHER REMEDIES. If an Event of Default occurs and is continuing, the Trustee may, and at the direction of the Holders of at least a majority in principal amount of the outstanding Notes shall, pursue any available remedy by proceeding at law or in equity to collect the payment of principal of or interest on the Notes or to enforce the performance of any provision of the Notes or this Indenture. The Trustee may maintain a proceeding even if it does not possess any of the Notes or does not produce any of them in the proceeding. SECTION 6.04. WAIVER OF PAST DEFAULTS. Subject to Sections 6.02, 6.08 and 9.02, the Holders of at least a majority in principal amount of the outstanding Notes, by notice to the Trustee, may waive an existing Default or Event of Default and its consequences, except a Default in the payment of principal of or interest on any Note as specified in clause (a) or (b) of Section 6.01 or in respect of a covenant or provision of this Indenture which cannot be modified or amended without the consent of the Holder of each outstanding Note affected. Upon any such waiver, such Default shall cease to exist, and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other Default or Event of Default or impair any right consequent thereto. SECTION 6.05. CONTROL BY MAJORITY. The Holders of at least a majority in aggregate principal amount of the outstanding Notes may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or exercising any trust or power conferred on the Trustee; PROVIDED that the Trustee may refuse to follow any direction if the Trustee, being advised by counsel, determines that the actions or proceedings so directed may not lawfully be taken or if the Trustee in good faith by its board of directors or executive committee or a trust committee of directors or trustees and/or responsible officers shall determine that the actions or proceedings so directed would involve the Trustee in personal liability; and PROVIDED FURTHER, that the Trustee may take any other action it deems proper that is not inconsistent with any such direction received from Holders of Notes. SECTION 6.06. PAYMENT OF SECURITIES ON DEFAULT; SUIT THEREFOR. The Company covenants that (a) in case default shall be made in the payment of any installment of interest on any of the Notes, as and when the same shall become due and payable, and such default shall have continued for a period of 30 days, or (b) in case default shall be made in the payment of principal of any of the Notes, as and when the same shall have become due and payable, whether upon maturity of the Notes or upon declaration or otherwise, then upon demand of the Trustee, the Company will pay to the Trustee, for the benefit of the Holders, the whole amount that then shall have become due and payable on all of the Notes, for principal or interest, if any, as the case may be, with interest upon the overdue principal and (to the extent that payment of such interest is enforceable under applicable law), upon overdue installments of interest, if any, at the 19 same rate as the rate of interest specified in the Notes; and, in addition thereto, such further amount as shall be sufficient to cover reasonable compensation to the Trustee, its agents, attorneys and counsel, and all other reasonable expenses and liabilities incurred, and all advances made, by the Trustee except as a result of its negligence or bad faith. SECTION 6.07. LIMITATION ON SUITS. A Holder may not institute any proceeding, judicial or otherwise, with respect to this Indenture or the Notes, or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless: (i) the Holder has previously given the Trustee written notice of a continuing Event of Default; (ii) the Holders of at least 25% in aggregate principal amount of outstanding Notes shall have made a written request to the Trustee to pursue such remedy; (iii) such Holder or Holders offer the Trustee indemnity satisfactory to the Trustee against any costs, liability or expense; (iv) the Trustee does not comply with the request within 60 days after receipt of the request and the offer of indemnity; and (v) during such 60-day period, the Holders of a majority in aggregate principal amount of the outstanding Notes do not give the Trustee a direction that is inconsistent with the request. For purposes of Section 6.05 of this Indenture and this Section 6.07, the Trustee shall comply with TIA Section 316(a) in making any determination of whether the Holders of the required aggregate principal amount of outstanding Notes have concurred in any request or direction of the Trustee to pursue any remedy available to the Trustee or the Holders with respect to this Indenture or the Notes or otherwise under the law. A Holder may not use this Indenture to prejudice the rights of another Holder or to obtain a preference or priority over such other Holder. SECTION 6.08. RIGHTS OF HOLDERS TO RECEIVE PAYMENT. Notwithstanding any other provision of this Indenture, the right of any Holder of a Note to receive payment of the principal of or interest on such Note or to bring suit for the enforcement of any such payment, on or after the due date expressed in the Notes, shall not be impaired or affected without the consent of such Holder. SECTION 6.09. COLLECTION SUIT BY TRUSTEE. If an Event of Default in payment of principal or interest specified in clause (a) or (b) of Section 6.01 occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company or any other obligor of the Notes for the whole amount of principal and accrued interest remaining unpaid, together with interest on overdue principal, and such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel. 20 SECTION 6.10. TRUSTEE MAY FILE PROOFS OF CLAIM. The Trustee may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07) and the Holders allowed in any judicial proceedings relative to the Company (or any other obligor of the Notes), its creditors or its property and shall be entitled and empowered to collect and receive any monies, securities or other property payable or deliverable upon conversion or exchange of the Notes or upon any such claims and to distribute the same, and any custodian, receiver, assignee, trustee, liquidator, sequestrator or other similar official in any such judicial proceeding is hereby authorized by each Holder to make such payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07. Nothing herein contained shall be deemed to empower the Trustee to authorize or consent to, or accept or adopt on behalf of any Holder, any plan of reorganization, arrangement, adjustment or composition affecting the Notes or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding. SECTION 6.11. PRIORITIES. If the Trustee collects any money pursuant to this Article Six, it shall pay out the money in the following order: First: to the payment of all reasonable costs and expenses applicable to such collection, reasonable compensation to the Trustee, its agents, attorneys and counsel, and all other reasonable expenses and liabilities incurred, and all advances made, by the Trustee except as a result of its negligence or bad faith; Second: to Holders for amounts then due and unpaid for principal of and interest on the Notes in respect of which or for the benefit of which such money has been collected, with interest upon the overdue installments of interest, to the extent lawful, at the same rate as the rate of interest on the Notes, ratably, without preference or priority of any kind, according to the amounts due and payable on such Notes for principal and interest, respectively; and Third: to the Company or any other obligors of the Notes, as their interests may appear, or as a court of competent jurisdiction may direct. The Trustee, upon prior written notice to the Company, may fix a record date and payment date for any payment to Holders pursuant to this Section 6.11. SECTION 6.12. UNDERTAKING FOR COSTS. In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as Trustee, a court may require any party litigant in such suit to file an undertaking to pay the costs of the suit, and the court may assess reasonable costs, including reasonable attorneys' fees, against any party litigant in the suit having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section 6.12 does not apply to a suit by the Trustee, 21 a suit by a Holder pursuant to Section 6.08, or a suit by Holders of more than 10% in principal amount of the outstanding Notes. SECTION 6.13. RESTORATION OF RIGHTS AND REMEDIES. If the Trustee or any Holder has instituted any proceeding to enforce any right or remedy under this Indenture and such proceeding has been discontinued or abandoned for any reason, or has been determined adversely to the Trustee or to such Holder, then, and in every such case, subject to any determination in such proceeding, the Company, the Trustee and the Holders shall be restored severally and respectively to their former positions hereunder and thereafter all rights and remedies of the Company, Trustee and the Holders shall continue as though no such proceeding had been instituted. SECTION 6.14. RIGHTS AND REMEDIES CUMULATIVE. No right or remedy herein conferred upon or reserved to the Trustee or to the Holders is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy. SECTION 6.15. DELAY OR OMISSION NOT WAIVER. No delay or omission of the Trustee or of any Holder to exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or an acquiescence therein. Every right and remedy given by this Article Six or by law to the Trustee or to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the Trustee or by the Holders, as the case may be. ARTICLE SEVEN TRUSTEE SECTION 7.01. GENERAL. The duties and responsibilities of the Trustee shall be as provided by the TIA and as set forth herein. Notwithstanding the foregoing, no provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder, or in the exercise of any of its rights or powers, if it shall have reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it. Whether or not herein expressly so provided, every provision of this Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Article Seven. SECTION 7.02. CERTAIN RIGHTS OF TRUSTEE. Subject to TIA Sections 315(a) through (d): (i) the Trustee may conclusively rely, and shall be protected in acting or refraining from acting, upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of 22 indebtedness or other paper or document believed by it to be genuine and to have been signed or presented by the proper person; (ii) before the Trustee acts or refrains from acting, it may require an Officers' Certificate or an Opinion of Counsel, which shall conform to Section 11.04. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on such certificate or opinion; (iii) the Trustee may act through its attorneys and agents and shall not be responsible for the misconduct or negligence of any attorney or agent appointed with due care by it hereunder; (iv) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to it against the costs, expenses and liabilities that might be incurred by it in compliance with such request or direction; (v) the Trustee shall not be liable for any action it takes or omits to take in good faith that it believes to be authorized or within its rights or powers, PROVIDED that the Trustee's conduct does not constitute negligence or bad faith; (vi) whenever in the administration of this Indenture the Trustee shall deem it desirable that a matter be proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, conclusively rely upon an Officers' Certificate; (vii) the Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document, but the Trustee, in its discretion, may make such further inquiry or investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company personally or by agent or attorney; (viii) the Trustee may consult with counsel of its selection and the advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by the Trustee hereunder in good faith and in reliance thereon; (ix) the Trustee shall not be deemed to have notice of any Default or Event of Default unless a Responsible Officer of the Trustee has actual knowledge thereof or unless written notice of any event which is in fact such a Default is received by the Trustee at the Corporate Trust Office of the Trustee, and such notice references the Notes and this Indenture; 23 (x) the rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent, custodian and other Person employed to act hereunder; and (xi) the Trustee may request that the Company deliver an Officers' Certificate setting forth the names of individuals and/or titles of Officers authorized at such time to take specified actions pursuant to this Indenture, which Officers' Certificate may be signed by any Person authorized to sign an Officers' Certificate, including any Person specified as so authorized in any such certificate previously delivered and not superseded. SECTION 7.03. INDIVIDUAL RIGHTS OF TRUSTEE. The Trustee, in its individual or any other capacity, may become the owner or pledgee of Notes and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not the Trustee. Any Agent may do the same with like rights. However, the Trustee is subject to TIA Sections 310(b) and 311. SECTION 7.04. TRUSTEE'S DISCLAIMER. The Trustee (i) makes no representation as to the validity or adequacy of this Indenture or the Notes, (ii) shall not be accountable for the Company's use or application of the proceeds from the Notes and (iii) shall not be responsible for any statement in the Notes other than its certificate of authentication. SECTION 7.05. NOTICE OF DEFAULT. If any Default or any Event of Default occurs and is continuing and if such Default or Event of Default is known to a Responsible Officer of the Trustee, the Trustee shall mail to each Holder in the manner and to the extent provided in TIA Section 313(c) notice of the Default or Event of Default within 45 days after it occurs, unless such Default or Event of Default has been cured; PROVIDED, HOWEVER, that, except in the case of a default in the payment of the principal of or interest on any Note, the Trustee shall be protected in withholding such notice if and so long as the board of directors, the executive committee or a trust committee of directors and/or Responsible Officers of the Trustee in good faith determine that the withholding of such notice is in the interest of the Holders. SECTION 7.06. REPORTS BY TRUSTEE TO HOLDERS. Within 60 days after each July 15, beginning with July 15, 2003, the Trustee shall mail to each Holder as provided in TIA Section 313(c) a brief report, if and as required by TIA Section 313(a), dated as of such July 15. A copy of each report at the time of its mailing to the Holders of Securities shall be mailed to the Company and filed with the Commission and each stock exchange on which the Securities are listed in accordance with TIA Section 313(d). The Company shall promptly notify the Trustee when the Securities are listed on any stock exchange or of any delisting thereof. SECTION 7.07. COMPENSATION AND INDEMNITY. The Company shall pay to the Trustee such compensation as shall be agreed upon in writing for its services hereunder. The compensation of the Trustee shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee upon request for all reasonable disbursements, expenses and advances incurred or made by the Trustee without negligence or bad faith on its part. Such expenses shall include the reasonable compensation and expenses of the Trustee's agents and counsel. 24 The Company shall indemnify the Trustee and any predecessor trustee for, and hold it harmless against, any and all loss or liability or expense incurred by it without negligence or bad faith on its part in connection with the acceptance or administration of this Indenture and its duties under this Indenture and the Notes, including the costs and expenses of defending itself against any claim or liability and of complying with any process served upon it or any of its officers in connection with the exercise or performance of any of its powers or duties under this Indenture and the Notes. The Trustee shall notify the Company promptly of any claim for which it may seek indemnity. Failure by the Trustee to so notify the Company shall not relieve the Company of its obligations hereunder, unless the Company is materially prejudiced thereby. The Company shall defend the claim and the Trustee shall cooperate in the defense. Unless otherwise set forth herein, the Trustee may have separate counsel and the Company shall pay the reasonable fees and expenses of such counsel. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld. To secure the Company's payment obligations in this Section 7.07, the Trustee shall have a lien prior to the Notes on all money or property held or collected by the Trustee, in its capacity as Trustee, except money or property held in trust to pay principal of and interest on particular Notes. If the Trustee incurs expenses or renders services after the occurrence of an Event of Default specified in clause (d) or (e) of Section 6.01, the expenses and the compensation for the services will be intended to constitute expenses of administration under Title 11 of the United States Bankruptcy Code or any applicable federal or state law for the relief of debtors. The provisions of this Section 7.07 shall survive the termination of this Indenture and the resignation and removal of the Trustee. The Trustee shall comply with the provisions of TIA Section 313(b)(2) to the extent applicable. SECTION 7.08. REPLACEMENT OF TRUSTEE. A resignation or removal of the Trustee and appointment of a successor Trustee shall become effective only upon the successor Trustee's acceptance of appointment as provided in this Section 7.08. The Trustee may resign at any time by so notifying the Company in writing at least 30 days prior to the date of the proposed resignation. The Holders of a majority in principal amount of the outstanding Notes may at any time remove the Trustee by so notifying the Trustee and may appoint a successor Trustee. The Company may remove the Trustee if: (i) the Trustee is no longer eligible under Section 7.10; (ii) the Trustee is adjudged a bankrupt or an insolvent; (iii) a receiver or other public officer takes charge of the Trustee or its property; or (iv) the Trustee becomes incapable of acting. If the Trustee resigns or is removed, or if a vacancy exists in the office of Trustee for any reason, the Company shall promptly appoint a successor Trustee. Within one year after the successor Trustee takes office, the Holders of a majority in principal amount of the outstanding Notes may appoint a successor Trustee to replace the successor Trustee appointed by the Company. If the successor Trustee does not deliver its written acceptance required by the next 25 succeeding paragraph of this Section 7.08 within 30 days after the retiring Trustee resigns or is removed, the retiring Trustee, the Company or the Holders of a majority in principal amount of the outstanding Notes may, at the expense of the Company, petition any court of competent jurisdiction for the appointment of a successor Trustee. A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company. Immediately after the delivery of such written acceptance, subject to the lien provided in Section 7.07, (i) the retiring Trustee shall transfer all property held by it as Trustee to the successor Trustee, (ii) the resignation or removal of the retiring Trustee shall become effective and (iii) the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. A successor Trustee shall mail notice of its succession to each Holder. No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible under this Article. If the Trustee is no longer eligible under Section 7.10 or shall fail to comply with TIA Section 310(b), any Holder who satisfies the requirements of TIA Section 310(b) may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee. If at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section 7.08, the Trustee shall resign immediately in the manner and with the effect provided in this Section. The Company shall give notice of any resignation and any removal of the Trustee and each appointment of a successor Trustee to all Holders. Each notice shall include the name of the successor Trustee and the address of its Corporate Trust Office. Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the Company's obligation under Section 7.07 shall continue for the benefit of the retiring Trustee. SECTION 7.09. SUCCESSOR TRUSTEE BY MERGER, ETC. If the Trustee consolidates with, merges or converts into, or transfers all or substantially all of its corporate trust business to, another corporation or national banking association, the resulting, surviving or transferee corporation or national banking association without any further act shall be the successor Trustee with the same effect as if the successor Trustee had been named as the Trustee herein, PROVIDED such corporation shall be otherwise qualified and eligible under this Article. SECTION 7.10. ELIGIBILITY. This Indenture shall always have a Trustee who satisfies the requirements of TIA Section 310(a)(1). The Trustee shall have a combined capital and surplus of at least $100 million as set forth in its most recent published annual report of condition that is subject to the requirements of applicable Federal or state supervising or examining authority. If at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section, the Trustee shall resign immediately in the manner and with the effect specified in this Article. SECTION 7.11. MONEY HELD IN TRUST. The Trustee shall not be liable for interest on any money received by it except as the Trustee may agree with the Company. Money held in trust by the Trustee need not be segregated from other funds except to the extent required by law and except for money held in trust under Article Eight of this Indenture. 26 ARTICLE EIGHT DISCHARGE OF INDENTURE SECTION 8.01. TERMINATION OF COMPANY'S OBLIGATIONS. Except as otherwise provided in this Section 8.01, the Company may terminate its obligations under the Notes and this Indenture if: (i) all Notes previously authenticated and delivered (other than destroyed, lost or stolen Notes that have been replaced or Notes that are paid pursuant to Section 4.01 or Notes for whose payment money or securities have theretofore been held in trust and thereafter repaid to the Company, as provided in Section 8.05) have been delivered to the Trustee for cancellation and the Company has paid all sums payable by it hereunder; or (ii) (A) the Notes mature within one year, (B) the Company irrevocably deposits in trust with the Trustee during such one-year period, under the terms of an irrevocable trust agreement in form and substance satisfactory to the Trustee, as trust funds solely for the benefit of the Holders for that purpose, money or U.S. Government Obligations sufficient (in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee), without consideration of any reinvestment of any interest thereon, to pay principal and interest on the Notes to maturity, and to pay all other sums payable by it hereunder, (C) no Default or Event of Default with respect to the Notes shall have occurred and be continuing on the date of such deposit, (D) such deposit will not result in a breach or violation of, or constitute a default under, this Indenture or any other agreement or instrument to which the Company is a party or by which it is bound and (E) the Company has delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, in each case stating that all conditions precedent provided for herein relating to the satisfaction and discharge of this Indenture have been complied with. With respect to the foregoing clause (i), the Company's obligations under Section 7.07 shall survive. With respect to the foregoing clause (ii), the Company's obligations in Sections 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09, 4.01, 4.02, 7.07, 7.08, 8.04, 8.05 and 8.06 shall survive until the Notes are no longer outstanding. Thereafter, only the Company's obligations in Sections 7.07, 8.04, 8.05 and 8.06 shall survive. After any such irrevocable deposit, the Trustee upon request shall acknowledge in writing the discharge of the Company's obligations under the Notes and this Indenture except for those surviving obligations specified above. SECTION 8.02. DEFEASANCE AND DISCHARGE OF INDENTURE. The Company will be deemed to have paid and will be discharged from any and all obligations in respect of the Notes on the 91st day after the date of the deposit referred to in clause (a) of this Section 8.02, and the provisions of this Indenture will no longer be in effect with respect to the Notes, and the Trustee, at the expense of the Company, shall execute proper instruments acknowledging the same if: (a) with reference to this Section 8.02, the Company has irrevocably deposited or caused to be irrevocably deposited with the Trustee (or another trustee satisfying the requirements of Section 7.10) and conveyed all right, title and interest to the Trustee for the 27 benefit of the Holders, under the terms of an irrevocable trust agreement in form and substance satisfactory to the Trustee as trust funds in trust, specifically pledged to the Trustee for the benefit of the Holders as security for payment of the principal of and interest, if any, on the Notes, and dedicated solely to, the benefit of the Holders, in and to (1) money in an amount, (2) U.S. Government Obligations that, through the payment of interest and principal in respect thereof in accordance with their terms, will provide, not later than one day before the due date of any payment referred to in this clause (a), money in an amount or (3) a combination thereof in an amount sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay and discharge, without consideration of the reinvestment of such interest and after payment of all federal, state and local taxes or other charges and assessments in respect thereof payable by the Trustee, the principal of and interest on the outstanding Notes on the Stated Maturity of such principal or interest; PROVIDED that the Trustee shall have been irrevocably instructed to apply such money or the proceeds of such U.S. Government Obligations to the payment of such principal and interest with respect to the Notes; (b) the Company has delivered to the Trustee either (x) an Opinion of Counsel to the effect that Holders will not recognize income, gain or loss for federal income tax purposes as a result of the Company's exercise of its option under this Section 8.02 and will be subject to federal income tax on the same amount and in the same manner and at the same times as would have been the case if such option had not been exercised, which Opinion of Counsel shall be based upon (and accompanied by a copy of) a ruling of the Internal Revenue Service to the same effect unless there has been a change in applicable federal income tax law after the Closing Date such that a ruling is no longer required or (y) a ruling directed to the Trustee received from the Internal Revenue Service to the same effect as the aforementioned Opinion of Counsel. (c) immediately after giving effect to such deposit, on a pro forma basis, no Default or Event of Default shall have occurred and be continuing on the date of such deposit or, insofar as Sections 6.01(d) and 6.01(e) are concerned, at any time during the period ending on the 91st day after such date of such deposit; (d) if the Notes are then listed on a national securities exchange, the Company has delivered to the Trustee an Opinion of Counsel to the effect that the Notes will not be delisted as a result of such deposit, defeasance and discharge; and (e) the Company has delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, in each case stating that all conditions precedent provided for herein relating to the defeasance contemplated by this Section 8.02 have been complied with. Notwithstanding the foregoing, prior to the end of the 91-day period referred to in clause (c) of this Section 8.02, none of the Company's obligations under this Indenture shall be discharged. Subsequent to the end of such 91-day period with respect to this Section 8.02, the Company's obligations in Sections 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09, 8.04, 8.05, 8.06 and the rights, powers, trusts, duties and immunities of the Trustee hereunder shall survive until the Notes are no longer outstanding. Thereafter, only the Company's obligations in Sections 7.07, 8.04, 8.05 and 8.06 shall survive. 28 After any such irrevocable deposit, the Trustee upon request shall acknowledge in writing the discharge of the Company's obligations under the Notes and this Indenture except for those surviving obligations in the immediately preceding paragraph. SECTION 8.03. DEFEASANCE OF CERTAIN OBLIGATIONS. The Company may omit to comply with any term, provision or condition set forth in Sections 4.03 and 5.01 and clause (c) of Section 6.01 with respect to Sections 4.03 and 5.01, and clause (c) of Section 6.01 shall be deemed not to be an Event of Default, in each case with respect to the outstanding Notes if: (i) with reference to this Section 8.03, the Company has irrevocably deposited or caused to be irrevocably deposited with the Trustee (or another trustee satisfying the requirements of Section 7.10) and conveyed all right, title and interest to the Trustee for the benefit of the Holders, under the terms of an irrevocable trust agreement in form and substance satisfactory to the Trustee as trust funds in trust, specifically pledged to the Trustee for the benefit of the Holders as security for payment of the principal of and interest, if any, on the Notes, and dedicated solely to, the benefit of the Holders, in and to (A) money in an amount, (B) U.S. Government Obligations that, through the payment of interest and principal in respect thereof in accordance with their terms, will provide, not later than one day before the due date of any payment referred to in this clause (i), money in an amount or (C) a combination thereof in an amount sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay and discharge, without consideration of the reinvestment of such interest and after payment of all federal, state and local taxes or other charges and assessments in respect thereof payable by the Trustee, the principal of and interest on the outstanding Notes on the Stated Maturity of such principal or interest; PROVIDED that the Trustee shall have been irrevocably instructed to apply such money or the proceeds of such U.S. Government Obligations to the payment of such principal and interest with respect to the Notes; (ii) the Company has delivered to the Trustee an Opinion of Counsel to the effect that the Holders will not recognize income, gain or loss for federal income tax purposes as a result of such deposit and defeasance of certain covenants and Events of Default and will be subject to federal income tax on the same amount and in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred; (iii) immediately after giving effect to such deposit on a pro forma basis, no Default or Event of Default shall have occurred and be continuing on the date of such deposit or, insofar as Sections 6.01(d) and 6.01(e) are concerned, at any time during the period ending on the 91st day after such date of such deposit; (iv) if the Notes are then listed on a national securities exchange, the Company has delivered to the Trustee an Opinion of Counsel to the effect that the Notes will not be delisted as a result of such deposit, defeasance and discharge; and 29 (v) the Company has delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, in each case stating that all conditions precedent provided for herein relating to the defeasance contemplated by this Section 8.03 have been complied with. SECTION 8.04. APPLICATION OF TRUST MONEY. Subject to Section 8.06, the Trustee or Paying Agent shall hold in trust money or U.S. Government Obligations deposited with it pursuant to Section 8.01, 8.02 or 8.03, as the case may be, and shall apply the deposited money and the money from U.S. Government Obligations in accordance with the Notes and this Indenture to the payment of principal of and interest on the Notes; but such money need not be segregated from other funds except to the extent required by law. SECTION 8.05. REPAYMENT TO COMPANY. Subject to Sections 7.07, 8.01, 8.02 and 8.03, the Trustee and the Paying Agent shall promptly pay to the Company upon request set forth in an Officers' Certificate any excess money held by them at any time and thereupon shall be relieved from all liability with respect to such money. The Trustee and the Paying Agent shall pay to the Company upon request any money held by them for the payment of principal or interest that remains unclaimed for two years; PROVIDED that the Trustee or Paying Agent before being required to make any payment may cause to be published at the expense of the Company once in a newspaper of general circulation in The City of New York or mail to each Holder entitled to such money at such Holder's address (as set forth in the Security Register) notice that such money remains unclaimed and that after a date specified therein (which shall be at least 30 days from the date of such publication or mailing) any unclaimed balance of such money then remaining will be repaid to the Company. After payment to the Company, Holders entitled to such money must look to the Company for payment as general creditors unless an applicable law designates another Person, and all liability of the Trustee and such Paying Agent with respect to such money shall cease. SECTION 8.06. REINSTATEMENT. If the Trustee or Paying Agent is unable to apply any money or U.S. Government Obligations in accordance with Section 8.01, 8.02 or 8.03, as the case may be, by reason of any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company's obligations under this Indenture and the Notes shall be revived and reinstated as though no deposit had occurred pursuant to Section 8.01, 8.02 or 8.03, as the case may be, until such time as the Trustee or Paying Agent is permitted to apply all such money or U.S. Government Obligations in accordance with Section 8.01, 8.02 or 8.03, as the case may be; PROVIDED that, if the Company has made any payment of principal of or interest on any Notes because of the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of such Notes to receive such payment from the money or U.S. Government Obligations held by the Trustee or Paying Agent. ARTICLE NINE AMENDMENTS, SUPPLEMENTS AND WAIVERS SECTION 9.01. WITHOUT CONSENT OF HOLDERS. The Company, when authorized by a resolution of its Board of Directors (as evidenced by a Board Resolution delivered to the 30 Trustee), and the Trustee may amend or supplement this Indenture or the Notes without notice to or the consent of any Holder: (i) to cure any ambiguity, defect or inconsistency in this Indenture; (ii) to comply with Article Five; (iii) to comply with any requirements of the Commission in connection with any qualification of this Indenture under the TIA; (iv) to evidence and provide for the acceptance of appointment hereunder by a successor Trustee; (v) to provide for uncertificated Notes in addition to or in place of certificated Notes; (vi) to add to the covenants of the Company for the protection of the Holders, to add any additional Events of Default with respect to the Notes, or to surrender any right or power conferred upon the Company; or (vii) to make any change that, in the good faith opinion of the Board of Directors as evidenced by a Board Resolution, does not materially and adversely affect the rights of any Holder. Any amendment described in clause (i) above made solely to conform this Indenture to the final offering memorandum provided to investors in connection with the initial offering of the Notes by the Company will not be deemed to materially and adversely affect the rights of Holders. SECTION 9.02. WITH CONSENT OF HOLDERS. Subject to Sections 6.04 and 6.08 and without prior notice to the Holders, the Company, when authorized by its Board of Directors (as evidenced by a Board Resolution delivered to the Trustee), and the Trustee may amend this Indenture and the Notes with the written consent of the Holders of a majority in aggregate principal amount of the Notes then outstanding, and the Holders of a majority in aggregate principal amount of the Notes then outstanding by written notice to the Trustee may waive future compliance by the Company with any provision of this Indenture or the Notes. Notwithstanding the provisions of this Section 9.02, without the consent of each Holder affected, an amendment or waiver, including a waiver pursuant to Section 6.04, may not: (i) change the Stated Maturity of the principal of, or any installment of interest on, any Note; (ii) reduce the principal amount of or interest on any Note; (iii) change any place or currency of payment of principal of or interest on any Note; 31 (iv) impair the right to institute suit for the enforcement of any payment on or after the Stated Maturity on any Note; (v) reduce the percentage or principal amount of outstanding Notes the consent of whose Holders is necessary to modify or amend this Indenture or to waive compliance with certain provisions of or certain Defaults under this Indenture; (vi) waive a default in the payment of principal of or interest on any Note; or (vii) modify any of the provisions of this Section 9.02, except to increase any such percentage or to provide that certain other provisions of this Indenture cannot be modified or waived without the consent of the Holder of each outstanding Note affected thereby. It shall not be necessary for the consent of the Holders under this Section 9.02 to approve the particular form of any proposed amendment, supplement or waiver, but it shall be sufficient if such consent approves the substance thereof. After an amendment, supplement or waiver under this Section 9.02 becomes effective, the Company shall mail to the Holders affected thereby a notice briefly describing the amendment, supplement or waiver. The Company will mail supplemental indentures to Holders upon request. Any failure of the Company to mail such notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such supplemental indenture or waiver. SECTION 9.03. ACTION BY HOLDERS; RECORD DATES. Whenever in this Indenture it is provided that the Holders of a specified aggregate principal amount of the outstanding Notes may take any action (including the making of any demand or request, the giving of any notice, consent or waiver or the taking of any other action), the fact that at the time of taking any such action the Holders of such specified amount have joined therein may be evidenced (a) by any instrument or any number of instruments of similar tenor executed by such Holders in person or by agent or proxy appointed in writing, or (b) the record of the Holders voting in favor thereof at any meeting of the Holders duly called and held in accordance with the provisions of Article Ten, or (c) any combination of such instrument or instruments and any such record of such a meeting of the Holders. Subject to the provisions of Sections 7.02 and 10.05, proof of the execution of any instrument by a Holder or its agent or proxy shall be sufficient if the ownership of the Notes shall be proved by (a) the Security Register or by a certificate of the Registrar; or (b) in accordance with such reasonable rules and regulations as may be prescribed by the Trustee or in any other manner which the Trustee may deem sufficient. The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Holders entitled to consent to any amendment, supplement or waiver. If a record date is fixed, then, notwithstanding the last two sentences of the immediately preceding paragraph, those persons who were Holders at such record date (or their duly designated proxies) and only those persons shall be entitled to consent to such amendment, supplement or waiver or to revoke any consent previously given, whether or not such persons continue to be Holders after 32 such record date. No such consent shall be valid or effective for more than 90 days after such record date. After an amendment, supplement or waiver becomes effective, it shall bind every Holder unless it is of the type described in the second paragraph of Section 9.02. In case of an amendment or waiver of the type described in the second paragraph of Section 9.02, the amendment or waiver shall bind each Holder who has consented to it and every subsequent Holder of a Note that evidences the same indebtedness as the Note of the consenting Holder. SECTION 9.04. REVOCATION AND EFFECT OF CONSENT. Until an amendment or waiver becomes effective, a consent to it by a Holder is a continuing consent by the Holder and every subsequent Holder of a Note or portion of a Note that evidences the same debt as the Note of the consenting Holder, even if notation of the consent is not made on any Note. However, any such Holder or subsequent Holder may revoke the consent as to its Note or portion of its Note. Such revocation shall be effective only if the Trustee receives the notice of revocation before the date the amendment, supplement or waiver becomes effective. An amendment, supplement or waiver shall become effective on receipt by the Trustee of written consents from the Holders of the requisite percentage in principal amount of the outstanding Notes. SECTION 9.05. NOTATION ON OR EXCHANGE OF NOTES. If an amendment, supplement or waiver changes the terms of a Note, the Trustee may require the Holder to deliver such Note to the Trustee. At the Company's expense, the Trustee may place an appropriate notation on the Note about the changed terms and return it to the Holder, and the Trustee may place an appropriate notation on any Note thereafter authenticated. Alternatively, if the Company or the Trustee so determines, the Company in exchange for the Note shall issue and the Trustee shall authenticate a new Note that reflects the changed terms. Failure to make the appropriate notation, or issue a new Note, shall not affect the validity and effect of such amendment, supplement or waiver. SECTION 9.06. TRUSTEE TO SIGN AMENDMENTS, ETC. The Trustee shall be entitled to receive, and shall be fully protected in relying upon, an Opinion of Counsel stating that the execution of any amendment, supplement or waiver authorized pursuant to this Article Nine is authorized or permitted by this Indenture and that it will be valid and binding upon the Company. Subject to the preceding sentence, the Trustee shall sign such amendment, supplement or waiver if the same does not adversely affect the rights, duties, liabilities or immunities of the Trustee. The Trustee may, but shall not be obligated to, execute any such amendment, supplement or waiver that affects the Trustee's own rights, duties or immunities under this Indenture or otherwise. SECTION 9.07. CONFORMITY WITH TRUST INDENTURE ACT. Every supplemental indenture executed pursuant to this Article Nine shall conform to the requirements of the TIA as then in effect. 33 ARTICLE TEN MEETINGS OF THE HOLDERS SECTION 10.01. PURPOSES OF MEETINGS. A meeting of the Holders may be called at any time and from time to time pursuant to the provisions of this Article Ten for any of the following purposes: (i) to give any notice to the Company or to the Trustee, or to give any directions to the Trustee, or to waive any Default hereunder and its consequences, or to take any other action authorized to be taken by the Holders pursuant to any of the provisions of Article Six; (ii) to remove the Trustee and appoint a successor trustee pursuant to the provisions of Article Seven; (iii) to consent to any amendment, supplement or waiver pursuant to the provisions of Section 9.02; or (iv) to take any other action authorized to be taken by or on behalf of the Holders of any specified aggregate principal amount of the outstanding Notes under any other provision of this Indenture or under applicable law. SECTION 10.02. CALL OF MEETINGS BY TRUSTEE. The Trustee may at any time call a meeting of the Holders to take any action specified in Section 10.01, to be held at such time and at such place in the Borough of Manhattan, The City of New York, as the Trustee shall determine. Notice of every meeting of the Holders, setting forth the time and place of such meeting and in general terms the action proposed to be taken at such meeting, shall be given (a) to all Holders of Notes then outstanding, by publication at least twice in an Authorized Newspaper in the Borough of Manhattan, The City of New York prior to the date fixed for the meeting, the first publication, in each case, to be not less than 20 nor more than 180 days prior to the date fixed for the meeting and the last publication to be not more than five days prior to the date fixed for the meeting and (b) to all Holders of Notes then outstanding who have filed their names and addresses with the Trustee, by mailing such notice to such Holders at such addresses, not less than 20 nor more than 180 days prior to the date fixed for the meeting. Failure of any Holder or Holders to receive such notice or any defect therein shall in no case affect the validity of any action taken at such meeting. Any meeting of the Holders shall be valid without notice if the Holders of all Notes then outstanding, the Company and the Trustee are present in person or by proxy or shall have waived notice thereof before or after the meeting. SECTION 10.03. CALL OF MEETINGS BY COMPANY OR HOLDERS. In case at any time the Company, pursuant to a Board Resolution, or the Holders of at least 10% in aggregate principal amount of the Notes then outstanding, as the case may be, shall have requested the Trustee to call a meeting of the Holders to take any action authorized in Section 10.01, by written request setting forth in reasonable detail the action proposed to be taken at the meeting, the Trustee shall not have mailed or published as provided in Section 10.02, the notice of such meeting within 30 days after receipt of such request, then the Company or the Holders in the amount above 34 specified may determine the time and the place in said Borough of Manhattan for such meeting and may call such meeting to take any action authorized in Section 10.01, by mailing or publishing notice thereof as provided in Section 10.02. SECTION 10.04. QUALIFICATION FOR VOTING. To be entitled to vote at any meeting of the Holders a person shall be a Holder of the Notes or a person appointed by an instrument in writing as proxy by such Holder. The only persons who shall be entitled to be present or to speak at any meeting of the Holders shall be the persons entitled to vote at such meeting and their counsel and any representatives of the Trustee and its counsel and any representatives of the Company and its counsel. SECTION 10.05. REGULATIONS. Notwithstanding any other provisions of this Indenture, the Trustee may make such reasonable regulations as it may deem advisable for any meeting of the Holders, in regard to proof of the holding of Notes and of the appointment of proxies, and in regard to the appointment and duties of inspectors of votes, the submission and examination of proxies, certificates and other evidence of the right to vote, and such other matters concerning the conduct of the meeting as the Trustee shall think fit. The Trustee shall, by an instrument in writing, appoint a temporary chairman of the meeting, unless the meeting shall have been called by the Company or by the Holders as provided in Section 10.03, in which case the Company or the Holders calling the meeting, as the case may be, shall in like manner appoint a temporary chairman. A permanent chairman and a permanent secretary of the meeting shall be elected by vote of the Holders of a majority in principal amount of the Notes represented at the meeting and entitled to vote. Subject to the provisions of Section 9.03, at any meeting of the Holders, each Holder or proxy shall be entitled to one vote for each $1,000 principal amount at maturity of outstanding Notes held or represented by such Holder; PROVIDED, HOWEVER, that no vote shall be cast or counted at any meeting in respect of any Note challenged as not outstanding and ruled by the chairman of the meeting not to be outstanding. The chairman of the meeting shall have no right to vote except as a Holder or proxy. Any meeting of the Holders duly called pursuant to the provisions of Section 10.02 or 10.03 may be adjourned from time to time, and the meeting may be held as so adjourned without further notice. SECTION 10.06. VOTING. The vote upon any resolution submitted to any meeting of the Holders shall be by written ballot on which shall be subscribed the signatures of the Holders or proxies and on which shall be inscribed the identifying number or numbers or to which shall be attached a list of identifying numbers of the Notes held or represented by them. The permanent chairman of the meeting shall appoint two inspectors of votes who shall count all votes cast at the meeting for or against any resolution and who shall make and file with the secretary of the meeting their verified reports in duplicate of all votes cast at the meeting. A record in duplicate of the proceedings of each meeting of the Holders shall be prepared by the secretary of the meeting and there shall be attached to said record the original reports of the inspectors of votes on any vote by ballot taken thereat and affidavits by one or more persons having knowledge of the facts setting forth a copy of the notice of the meeting and showing that said notice was mailed as provided in Section 10.02. The record shall be signed and verified by the permanent chairman and secretary of the meeting and one of the duplicates shall be delivered to the 35 Company and the other to the Trustee to be preserved by the Trustee, the latter to have attached hereto the ballots voted at the meeting. Any record so signed and verified shall be conclusive evidence of the matters therein stated. ARTICLE ELEVEN MISCELLANEOUS SECTION 11.01. TRUST INDENTURE ACT OF 1939. Prior to the effectiveness of the Registration Statement, this Indenture shall incorporate and be governed by the provisions of the TIA that are required to be part of and to govern indentures qualified under the TIA. After the effectiveness of the Registration Statement, this Indenture shall be subject to the provisions of the TIA that are required to be part of this Indenture and shall, to the extent applicable, be governed by such provisions. SECTION 11.02. NOTICES. Any notice or communication shall be sufficiently given if in writing and delivered in person, mailed by first-class mail or sent by telecopier transmission addressed as follows: if to the Company: Aon Corporation 200 East Randolph Street Chicago, Illinois 60601 Telecopier No.: (312) 381-6060 Attention: Treasurer if to the Trustee: The Bank of New York c/o BNY Midwest Trust Company 2 North LaSalle Street, Suite 1020 Chicago, Illinois 60602 Attention: Corporate Trust Administration The Company or the Trustee by notice to the other may designate additional or different addresses for subsequent notices or communications. Any notice or communication mailed to a Holder shall be mailed to it at its address as it appears on the Security Register by first-class mail and shall be sufficiently given to him if so mailed within the time prescribed. Any notice or communication shall also be so mailed to any Person described in TIA Section 313(c), to the extent required by the TIA. Copies of any such communication or notice to a Holder shall also be mailed to the Trustee and each Agent at the same time. Failure to mail a notice or communication to a Holder as provided herein or any defect in any such notice or communication shall not affect its sufficiency with respect to other Holders. 36 Except for a notice to the Trustee, which is deemed given only when received, and except as otherwise provided in this Indenture, if a notice or communication is mailed in the manner provided in this Section 11.02, it is duly given, whether or not the addressee receives it. Where this Indenture provides for notice in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver. In case by reason of the suspension of regular mail service or by reason of any other cause it shall be impracticable to give such notice by mail, then such notification as shall be made with the approval of the Trustee shall constitute a sufficient notification for every purpose hereunder. Holders may communicate pursuant to TIA Section 312(b) with other Holders with respect to their rights under this Indenture or the Notes. The Company, the Trustee, the Registrar and anyone else shall have the protection of TIA Section 312(c). SECTION 11.03. CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT. Upon any request or application by the Company to the Trustee to take any action under this Indenture, the Company shall furnish to the Trustee: (i) an Officers' Certificate stating that, in the opinion of the signers, all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with; and (ii) an Opinion of Counsel stating that, in the opinion of such Counsel, all such conditions precedent have been complied with. SECTION 11.04. STATEMENTS REQUIRED IN CERTIFICATE OR OPINION. Each certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture shall include: (i) a statement that each person signing such certificate or opinion has read such covenant or condition and the definitions herein relating thereto; (ii) a brief statement as to the nature and scope of the examination or investigation upon which the statement or opinion contained in such certificate or opinion is based; (iii) a statement that, in the opinion of each such person, such person has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with; and (iv) a statement as to whether or not, in the opinion of each such person, such condition or covenant has been complied with; PROVIDED, HOWEVER, that, with respect to 37 matters of fact, an Opinion of Counsel may rely on an Officers' Certificate or certificates of public officials. SECTION 11.05. RULES BY TRUSTEE, PAYING AGENT OR REGISTRAR. The Trustee may make reasonable rules for action by or at a meeting of Holders. The Paying Agent or Registrar may make reasonable rules for its functions. SECTION 11.06. PAYMENT DATE OTHER THAN A BUSINESS DAY. If any Interest Payment Date or the Maturity Date shall not be a Business Day, then payment of principal of or interest on the Notes will be made on the next succeeding Business Day with the same force and effect as if made on the date such payment was due, and no interest will accrue on such payment for the period from and after such Interest Payment Date or the Maturity Date to the date of such payment on the next succeeding Business Day. SECTION 11.07. GOVERNING LAW. This Indenture and the Notes shall be governed by the laws of the State of New York. The Trustee, the Company and the Holders agree to submit to the jurisdiction of the courts of the State of New York in any action or proceeding arising out of or relating to this Indenture or the Notes. SECTION 11.08. NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS. This Indenture may not be used to interpret another indenture, loan or debt agreement of the Company or any Subsidiary of the Company. Any such indenture, loan or debt agreement may not be used to interpret this Indenture. SECTION 11.09. NO RECOURSE AGAINST OTHERS. No recourse for the payment of the principal of or interest on any of the Notes, or for any claim based thereon or otherwise in respect thereof, and no recourse under or upon any obligation, covenant or agreement of the Company contained in this Indenture or in any of the Notes, or because of the creation of any indebtedness represented thereby, shall be had against any incorporator or against any past, present or future partner, stockholder, other equityholder, officer, director, employee or controlling person, as such, of the Company or of any successor Person, either directly or through the Company or any successor Person, whether by virtue of any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise; it being expressly understood that all such liability is hereby expressly waived and released as a condition of, and as a consideration for, the execution of this Indenture and the issue of the Notes. SECTION 11.10. SUCCESSORS. All agreements of the Company in this Indenture and the Notes shall bind its successors. All agreements of the Trustee in this Indenture shall bind its successor. SECTION 11.11. DUPLICATE ORIGINALS. The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. SECTION 11.12. SEPARABILITY. In case any provision in this Indenture or in the Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 38 SECTION 11.13. TABLE OF CONTENTS, HEADINGS, ETC. The Table of Contents and headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not to be considered a part hereof and shall in no way modify or restrict any of the terms and provisions hereof. SECTION 11.14. COUNTERPARTS. This Indenture may be executed in any number of counterparts, each of which shall be an original and all of which taken together shall constitute one and the same instrument. 39 SIGNATURES IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as of the date first written above. Aon CORPORATION By: /s/ Harvey N. Medvin --------------------------------- Name: Title: THE BANK OF NEW YORK By: /s/ Mary Beth Lewicki --------------------------------- Name: Mary Beth Lewicki Title: Vice President 40 EXHIBIT A FORM OF NOTE [UNLESS AND UNTIL A NOTE IS EXCHANGED FOR AN EXCHANGE NOTE OR SOLD IN CONNECTION WITH AN EFFECTIVE REGISTRATION STATEMENT PURSUANT TO THE REGISTRATION RIGHTS AGREEMENT, THE GLOBAL NOTES AND PHYSICAL NOTES SHALL BEAR THE LEGEND SET FORTH BELOW. THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT); (2) AGREES THAT IT WILL NOT, WITHIN THE TIME PERIOD REFERRED TO UNDER RULE 144(k) UNDER THE SECURITIES ACT AS IN EFFECT ON THE DATE OF TRANSFER OF THIS NOTE, RESELL OR OTHERWISE TRANSFER THIS NOTE EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (D) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS NOTE IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS NOTE WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO THE TRUSTEE. THE INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE FOREGOING RESTRICTIONS.] [EACH GLOBAL NOTE, WHETHER OR NOT AN EXCHANGE NOTE, SHALL ALSO BEAR THE FOLLOWING LEGEND. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE AND IS REGISTERED IN THE NAME OF CEDE & CO. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFERS OF THIS GLOBAL NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN NOMINEES OF CEDE & CO. OR A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN SECTION 2.08 OF THE INDENTURE.] A-2 [FACE OF NOTE] AON CORPORATION 7.375% SENIOR NOTE DUE 2012 [CUSIP] [CINS] [ISIN] [__________] No. ____ Principal Amount $__________ Aon CORPORATION, a Delaware corporation (the "Company", which term includes any successor under the Indenture hereinafter referred to), for value received, promises to pay to _____________, or its registered assigns, the principal sum of ____________ ($_________) on December 14, 2012. Interest Payment Dates: June 14 and December 14 of each year, commencing June 14, 2003. Record Dates: The fifteenth calendar day, whether or not a Business Day, immediately preceding each Interest Payment Date. Reference is hereby made to the further provisions of this Note set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Additional provisions of this Note are set forth on the other side of this Note. A-3 IN WITNESS WHEREOF, the Company has caused this Note to be signed manually or by facsimile by its duly authorized officers. Aon CORPORATION By: ---------------------------------- Name: Title: By: ---------------------------------- Name: Title: TRUSTEE'S CERTIFICATE OF AUTHENTICATION This is one of the 7.375% Senior Notes due 2012 described in the within-mentioned Indenture. Date: December 16, 2002 THE BANK OF NEW YORK, as Trustee By: ------------------------------------- Authorized Signatory A-4 [REVERSE SIDE OF NOTE] AON CORPORATION 7.375% SENIOR NOTE DUE 2012 1. PRINCIPAL AND INTEREST. The Company will pay the principal of this Note on December 14, 2012. The Company promises to pay interest on the principal amount of this Note on each Interest Payment Date, as set forth below, at the rate per annum shown above, subject to adjustment as described below. Interest will be payable semiannually in arrears (to the Holders of record of the Notes at the close of business on the fifteenth calendar day, whether or not a Business Day, immediately preceding the relevant Interest Payment Date) on each Interest Payment Date of each year, commencing June 14, 2003; PROVIDED that no interest shall accrue on the principal amount of this Note prior to December 16, 2002. Interest on the Notes will be computed on the basis of a 360-day year of twelve 30-day months. If an exchange offer (the "EXCHANGE OFFER") registered under the Securities Act is not consummated or a Shelf Registration Statement under the Securities Act with respect to resales of the Notes is not declared effective by the Commission, on or before the date that is 210 days after the date on which the Notes are originally issued under this Indenture (the "REGISTRATION DATE") in accordance with the terms of the Registration Rights Agreement, dated as of December 16, 2002, between the Company and Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc., the annual interest rate payable on the Notes shall be increased by 0.5% from the rate shown above accruing from the Registration Date, payable in cash semiannually, in arrears, on each Interest Payment Date until the Exchange Offer is consummated or the Shelf Registration Statement is declared effective. The Holder of this Note is entitled to the benefits of such Registration Rights Agreement. Interest on the Notes will accrue from, and including, December 16, 2002 to, and excluding, the first Interest Payment Date and then from, and including, the immediately preceding Interest Payment Date to which interest has been paid or duly provided for to, but excluding, the next Interest Payment Date or the Maturity Date, as the case may be; PROVIDED that, if there is no existing default in the payment of interest and this Note is authenticated between a Record Date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such Interest Payment Date. Interest will be computed on the basis of a 360-day year of twelve 30-day months. 2. METHOD OF PAYMENT. The Company will pay interest on the principal amount of the Notes as provided above on each June 14 and December 14, commencing June 14, 2003 to the persons who are Holders (as reflected in the Security Register at the close of business on the fifteenth calendar day, whether or not a Business Day, immediately preceding the Interest Payment Date), in each case, A-5 even if the Note is cancelled on registration of transfer or registration of exchange after such Record Date; PROVIDED that, with respect to the payment of principal, the Company will make payment to the Holder that surrenders this Note to a Paying Agent on or after December 14, 2012. The Company will pay principal and, as provided above, interest in money of the United States that at the time of payment is legal tender for payment of public and private debts. However, the Company may pay principal and interest by its check payable in such money. It may mail an interest check to a Holder's registered address (as reflected in the Security Register). If any Interest Payment Date or the Maturity Date falls on a day that is not a Business Day, the payment of principal and interest will be made on the next succeeding Business Day as if made on the date such payment was due, and no interest will accrue on such payment for the period from and after the Maturity Date to the date of such payment on the next succeeding Business Day. 3. PAYING AGENT AND REGISTRAR. Initially, the Trustee will act as authenticating agent, Paying Agent and Registrar. The Company may change any authenticating agent, Paying Agent or Registrar without notice. The Company, any Subsidiary or any Affiliate of any of them may act as Paying Agent, Registrar or Co-Registrar. 4. INDENTURE; LIMITATIONS. The Company issued the Notes under an Indenture, dated as of December 16, 2002 (the "Indenture"), between the Company and The Bank of New York, as trustee (the "Trustee"). Capitalized terms herein are used as defined in the Indenture unless otherwise indicated. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act. The Notes are subject to all such terms, and Holders are referred to the Indenture and the Trust Indenture Act for a statement of all such terms. To the extent permitted by applicable law, in the event of any inconsistency between the terms of this Note and the terms of the Indenture, the terms of the Indenture shall control. The Notes are general unsecured obligations of the Company. The Company may, subject to Article Four of the Indenture and applicable law, issue additional Notes under the Indenture. 5. REDEMPTION. The Notes are not redeemable prior to the Maturity Date. 6. DENOMINATIONS; TRANSFER; EXCHANGE. The Notes are in registered form without coupons in denominations of $1,000 of principal amount and multiples of $1,000 in excess thereof. A Holder may register the transfer or exchange of Notes in accordance with the Indenture. The Registrar may require a Holder, A-6 among other things, to furnish appropriate endorsements and transfer documents and to pay any taxes and fees required by law or permitted by the Indenture. 7. PERSONS DEEMED OWNERS. A Holder shall be treated as the owner of a Note for all purposes. 8. UNCLAIMED MONEY. If money for the payment of principal or interest remains unclaimed for two years, the Trustee and the Paying Agent will pay the money back to the Company at its request. After that, Holders entitled to the money must look to the Company for payment, unless an abandoned property law designates another Person, and all liability of the Trustee and such Paying Agent with respect to such money shall cease. In no event will interest accrue on such unclaimed monies. 9. DISCHARGE PRIOR TO MATURITY. If the Company deposits with the Trustee money or U.S. Government Obligations sufficient to pay the then outstanding principal of and accrued and unpaid interest on the Notes (a) to maturity, the Company will be discharged from the Indenture and the Notes, except in certain circumstances for certain provisions thereof, and (b) to the Stated Maturity, the Company will be discharged from certain covenants set forth in the Indenture. 10. AMENDMENT; SUPPLEMENT; WAIVER. Subject to certain exceptions, (a) the Indenture or the Notes may be amended or supplemented with the consent of the Holders of at least a majority in principal amount of the Notes then outstanding and (b) any existing default or compliance with any provision may be waived with the consent of the Holders of at least a majority in principal amount of the Notes then outstanding. Without notice to or the consent of any Holder, the parties thereto may amend or supplement the Indenture or the Notes to, among other things, cure any ambiguity, defect or inconsistency and make any change that does not materially and adversely affect the rights of any Holder. 11. RESTRICTIVE COVENANTS. The Indenture imposes certain limitations on the ability of the Company, among other things, to (a) create security interests in the common stock of any Significant Subsidiary to secure debt or (b) merge, consolidate or transfer or lease substantially all of its assets. On or before a date not more than four months after the end of each fiscal year, the Company shall deliver to the Trustee an Officers' Certificate stating whether or not the signers thereof know of any Default or Event of Default under such restrictive covenants. A-7 12. SUCCESSOR PERSONS. When a successor Person or other entity assumes all the obligations of its predecessor under the Notes and the Indenture, the predecessor person will be released from those obligations. 13. DEFAULTS AND REMEDIES. Any of the following events constitutes an "Event of Default" under the Indenture: (a) default in the payment of the principal of any of the Notes as and when the same shall become due and payable either at maturity, by declaration or otherwise; or (b) default in the payment of any installment of interest on any of the Notes as and when the same shall become due and payable, and continuance of such default for a period of 30 days; or (c) failure on the part of the Company duly to observe or perform any other of the covenants or agreements on the part of the Company in this Indenture applicable to the Notes for a period of 90 days after the date on which written notice of such failure, specifying such failure and requiring the Company to remedy the same and stating that such notice is a "Notice of Default" hereunder, shall have been given to the Company by the Trustee, or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of the Notes at the time outstanding; or (d) a court having jurisdiction in the premises shall enter a decree or order for relief in respect of the Company in an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or appointing a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of the Company or for any substantial part of its property, or ordering the winding-up or liquidation of its affairs and such decree or order shall remain unstayed and in effect for a period of 90 days; or (e) the Company shall commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or shall consent to the entry of any order for relief in an involuntary case under any such law, or shall consent to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or similar official) of the Company or for any substantial part of its property, or shall make any general assignment for the benefit of creditors. If an Event of Default, as defined in the Indenture, occurs and is continuing, the Trustee may, and at the direction of the Holders of at least 25% in aggregate principal amount of the Notes then outstanding shall, declare all the Notes to be due and payable. If a bankruptcy or insolvency default with respect to the Company occurs and is continuing, the Notes automatically become due and payable. Holders may not enforce the Indenture or the Notes except as provided in the Indenture. The Trustee may require indemnity satisfactory to it before it enforces the Indenture or the Notes. Subject to certain limitations, Holders of at least a majority in principal amount of the Notes then outstanding may direct the Trustee in its exercise of any trust or power. A-8 14. TRUSTEE DEALINGS WITH THE COMPANY. The Trustee under the Indenture, in its individual or any other capacity, may make loans to, accept deposits from and perform services for the Company or its Affiliates and may otherwise deal with the Company or its Affiliates as if it were not the Trustee. 15. NO RECOURSE AGAINST OTHERS. No incorporator or any past, present or future partner, stockholder, other equityholder, officer, director, employee or controlling person, as such, of the Company or of any successor Person shall have any liability for any obligations of the Company under the Notes or the Indenture or for any claim based on, in respect of or by reason of, such obligations or their creation. Each Holder by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Notes. 16. AUTHENTICATION. This Note shall not be valid until the Trustee or authenticating agent signs the certificate of authentication on the other side of this Note. 17. ABBREVIATIONS. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian) and U/G/M/A (= Uniform Gifts to Minors Act). 18. GOVERNING LAW. This Note shall be governed by, and construed in accordance with, the laws of the State of New York. The Trustee, the Company and the Holders agree to submit to the jurisdiction of the courts of the State of New York in any action or proceeding arising out of or relating to the Notes. The Company will furnish a copy of the Indenture to any Holder upon written request and without charge. Requests may be made to Aon Corporation, 200 East Randolph Street, Chicago, Illinois 60601; Attention: Treasurer. A-9 [FORM OF TRANSFER NOTICE] FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and transfer(s) unto:_________________________________________________ Insert Taxpayer Identification No. ________________________________________________________________________________ Please print or typewrite name and address including zip code of assignee ________________________________________________________________________________ ________________________________________________________________________________ the within Note and all rights thereunder, hereby irrevocably constituting and appointing attorney to transfer said Note on the books of the Company with full power of substitution in the premises. [THE FOLLOWING PROVISION TO BE INCLUDED ON ALL NOTES OTHER THAN EXCHANGE NOTES] In connection with any transfer of this Note occurring prior to the date which is the end of the period referred to in Rule 144(k) under the Securities Act, the undersigned confirms that without utilizing any general solicitation or general advertising that: [Check One] [ ](a) this Note is being transferred in compliance with the exemption from registration under the Securities Act of 1933 provided by Rule 144A thereunder. or [ ](b) this Note is being transferred other than in accordance with (a) above and documents are being furnished which comply with the conditions of transfer set forth in this Note and the Indenture. A-10 If none of the foregoing boxes is checked, the Trustee or other Registrar shall not be obligated to register this Note in the name of any Person other than the Holder hereof unless and until the conditions to any such transfer of registration set forth herein and in Section 2.08 of the Indenture shall have been satisfied. Date: ---------------- ------------------------------------- NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within-mentioned instrument in every particular, without alteration or any change whatsoever. [TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED. The undersigned represents and warrants that it is purchasing this Note for its own account or an account with respect to which it exercises sole investment discretion and that it and any such account is a "qualified institutional buyer" within the meaning of Rule 144A under the Securities Act of 1933 and is aware that the sale to it is being made in reliance on Rule 144A and acknowledges that it has received such information regarding the Company as the undersigned has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon the undersigned's foregoing representations in order to claim the exemption from registration provided by Rule 144A. Date: ---------------- ------------------------------------- NOTICE: To be executed by an executive officer] A-11 [TO BE INCLUDED ON EXCHANGE NOTES] ASSIGNMENT FORM I or we assign and transfer this Note to:_______________________________________ Insert social security or other identifying number of assignee ________________________________________________________________________________ Print or type name, address and zip code of assignee ________________________________________________________________________________ ________________________________________________________________________________ and irrevocably appoint ____________________________________, as agent, to transfer this Note on the books of the Company. The agent may substitute another to act for him. Date: ----------------- Signed ------------------------------ (Sign exactly as name appears on the other side of this Note) Signature Guarantee*: --------------------------------------- * The Holder's signature must be guaranteed by a member firm of a registered national securities exchange or of the National Association of Securities Dealers, Inc., a commercial bank or trust company having an office or correspondent in the United States or an "eligible guarantor institution" as defined by Rule 17Ad-15 under the Exchange Act. A-12 EX-4.B 4 a2101105zex-4_b.txt EX-4(B) EXHIBIT 4(b) EXECUTION COPY - -------------------------------------------------------------------------------- REGISTRATION RIGHTS AGREEMENT Dated December 16, 2002 between AON CORPORATION and SALOMON SMITH BARNEY INC. CREDIT SUISSE FIRST BOSTON CORPORATION BNY CAPITAL MARKETS, INC. and WACHOVIA SECURITIES, INC. - -------------------------------------------------------------------------------- REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (the "AGREEMENT") is made and entered into on December 16, 2002 between Corporation, a Delaware corporation (the "COMPANY"), and Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc. (the "PURCHASERS"). This Agreement is made pursuant to the Purchase Agreement dated December 11, 2002 between the Company and the Purchasers (the "PURCHASE AGREEMENT"), which provides for the sale by the Company to the Purchasers of $225,000,000 aggregate principal amount of the Company's 7.375% Senior Notes due 2012 (the "SECURITIES"). In order to induce the Purchasers to enter into the Purchase Agreement, the Company has agreed to provide to the Purchasers and their direct and indirect transferees the registration rights set forth in this Agreement. The execution of this Agreement is a condition to the closing under the Purchase Agreement. In consideration of the foregoing, the parties hereto agree as follows: 1. DEFINITIONS As used in this Agreement, the following capitalized defined terms shall have the following meanings: "1933 ACT" shall mean the Securities Act of 1933, as amended from time to time. "1934 ACT" shall mean the Securities Exchange Act of 1934, as amended from time to time. "CLOSING DATE" shall mean the Closing Date as defined in the Purchase Agreement. "COMPANY" shall have the meaning set forth in the preamble and shall also include the Company's successors. "EXCHANGE OFFER" shall mean the exchange offer by the Company of Exchange Securities for Registrable Securities pursuant to Section 2(a) hereof. "EXCHANGE OFFER REGISTRATION" shall mean a registration under the 1933 Act effected pursuant to Section 2(a) hereof. "EXCHANGE OFFER REGISTRATION STATEMENT" shall mean an exchange offer registration statement on Form S-4 (or, if applicable, on another appropriate form) under the 1933 Act and all amendments and supplements to such registration statement, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein. "EXCHANGE SECURITIES" shall mean securities issued by the Company under the Indenture containing terms identical to the Securities (except that (i) interest thereon shall accrue from the last date on which interest was paid on the Securities or, if no such interest has been paid, from December 16, 2002 and (ii) the Exchange Securities generally will not contain restrictions on transfer) and to be offered to Holders of Securities in exchange for Securities pursuant to the Exchange Offer. "HOLDER" shall mean each Purchaser, for so long as it owns any Registrable Securities, and each of its successors, assigns and direct and indirect transferees who become registered owners of Registrable Securities under the Indenture. "INDENTURE" shall mean the Indenture relating to the Securities dated as of December 16, 2002 between the Company and The Bank of New York, as trustee, and as the same may be amended from time to time in accordance with the terms thereof. "MAJORITY HOLDERS" shall mean the Holders of a majority of the aggregate principal amount of outstanding Registrable Securities; provided that, whenever the consent or approval of Holders of a specified percentage of Registrable Securities is required hereunder, Registrable Securities held by the Company or any of its affiliates (as such term is defined in Rule 405 under the 1933 Act) (other than the Purchasers or subsequent Holders of Registrable Securities if such subsequent Holders are deemed to be such affiliates solely by reason of their holding of such Registrable Securities) shall not be counted in determining whether such consent or approval was given by the Holders of such required percentage or amount. "PARTICIPATING BROKER-DEALER" shall have the meaning set forth in Section 4(a). "PERSON" shall mean an individual, partnership, limited liability company, corporation, trust or unincorporated organization, or a government or agency or political subdivision thereof. "PURCHASERS" shall have the meaning set forth in the preamble. "PURCHASE AGREEMENT" shall have the meaning set forth in the preamble. 2 "PROSPECTUS" shall mean the prospectus included in a Registration Statement, including any preliminary prospectus, and any such prospectus as amended or supplemented by any prospectus supplement, including a prospectus supplement with respect to the terms of the offering of any portion of the Registrable Securities covered by a Shelf Registration Statement, and by all other amendments and supplements to such prospectus, and in each case including all material incorporated by reference therein. "REGISTRABLE SECURITIES" shall mean the Securities; provided, however, that the Securities shall cease to be Registrable Securities (i) when a Registration Statement with respect to such Securities shall have been declared effective under the 1933 Act and such Securities shall have been disposed of pursuant to such Registration Statement, (ii) when such Securities have been sold to the public pursuant to Rule 144(k) (or any similar provision then in force, but not Rule 144A) under the 1933 Act, (iii) when such Securities shall have ceased to be outstanding or (iv) when such Securities have been exchanged for Exchange Securities unless, in the case of any Exchange Securities referred to in this clause (iv), such Exchange Securities are held by Participating Broker-Dealers (in which case such Exchange Securities will be deemed to be Registrable Securities until such time as such Exchange Securities are sold to a purchaser in whose hands such Exchange Securities are freely tradable in accordance with the provisions of Section 4). "REGISTRATION EXPENSES" shall mean any and all expenses incident to performance of or compliance by the Company with this Agreement, including without limitation: (i) all SEC, stock exchange or National Association of Securities Dealers, Inc. registration and filing fees, (ii) all fees and expenses incurred in connection with compliance with state securities or blue sky laws (including reasonable fees and disbursements of counsel for any underwriters or Holders in connection with blue sky qualification of any of the Exchange Securities or Registrable Securities), (iii) all expenses of any Persons in preparing or assisting in preparing, word processing, printing and distributing any Registration Statement, any Prospectus, any amendments or supplements thereto, any underwriting agreements, securities sales agreements and other documents relating to the performance of and compliance with this Agreement, (iv) all rating agency fees, (v) all fees and disbursements relating to the qualification of the Indenture under applicable securities laws, (vi) the fees and disbursements of the Trustee and its counsel, (vii) the fees and disbursements of counsel for the Company and, in the event the Company determines to file a Shelf Registration Statement, the reasonable fees and disbursements of one counsel for the Holders (which counsel shall be selected by the Majority Holders and which counsel may also be counsel for the Purchasers) and (viii) the fees and disbursements of the independent public accountants of the Company, including the expenses of any special audits or "COLD COMFORT" letters required by or incident to such performance and compliance, but excluding fees and expenses of counsel to the 3 underwriters (other than fees and expenses set forth in clause (ii) above) or the Holders and underwriting discounts and commissions and transfer taxes, if any, relating to the sale or disposition of Registrable Securities by a Holder. "REGISTRATION STATEMENT" shall mean any registration statement of the Company that covers any of the Exchange Securities or Registrable Securities pursuant to the provisions of this Agreement and all amendments and supplements to any such Registration Statement, including post-effective amendments, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein. "SEC" shall mean the Securities and Exchange Commission. "SHELF REGISTRATION" shall mean a registration effected pursuant to Section 2(b) hereof. "SHELF REGISTRATION STATEMENT" shall mean a "SHELF" registration statement of the Company pursuant to the provisions of Section 2(b) of this Agreement which covers all of the Registrable Securities but no other securities unless approved by the Holders whose Registrable Securities are covered by such Shelf Registration Statement on an appropriate form under Rule 415 under the 1933 Act, or any similar rule that may be adopted by the SEC, and all amendments and supplements to such registration statement, including post-effective amendments, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein. "TRUSTEE" shall mean the trustee with respect to the Securities under the Indenture. "UNDERWRITER" shall have the meaning set forth in Section 3 hereof. "UNDERWRITTEN REGISTRATION" or "UNDERWRITTEN OFFERING" shall mean a registration in which Registrable Securities are sold to an Underwriter for reoffering to the public. 2. REGISTRATION UNDER THE 1933 ACT. (a) To the extent not prohibited by any applicable law or applicable interpretation of the Staff of the SEC, the Company shall use its reasonable best efforts to cause to be filed an Exchange Offer Registration Statement covering the offer by the Company to the Holders to exchange all of the Registrable Securities for Exchange Securities and to have such Registration Statement remain effective until the closing of the Exchange Offer. The Company shall commence the Exchange Offer promptly after the Exchange Offer Registration Statement has been declared effective by 4 the SEC and use its reasonable best efforts to have the Exchange Offer consummated not later than 60 days after such effective date. The Company shall commence the Exchange Offer by mailing the related exchange offer Prospectus and accompanying documents to each Holder stating, in addition to such other disclosures as are required by applicable law: (i) that the Exchange Offer is being made pursuant to this Agreement and that all Registrable Securities validly tendered and not withdrawn will be accepted for exchange; (ii) the dates of acceptance for exchange (which shall be a period of at least 20 business days from the date such notice is mailed) (the "EXCHANGE DATES"); (iii) that any Registrable Security not tendered will remain outstanding and continue to accrue interest, but will not retain any rights under this Agreement; (iv) that Holders electing to have a Registrable Security exchanged pursuant to the Exchange Offer will be required to surrender such Registrable Security, together with the enclosed letters of transmittal, to the institution and at the address (located in the Borough of Manhattan, The City of New York) specified in the notice prior to the close of business on the last Exchange Date; and (v) that Holders will be entitled to withdraw their election, not later than the close of business on the last Exchange Date, by sending to the institution and at the address (located in the Borough of Manhattan, The City of New York) specified in the notice a telegram, telex, facsimile transmission or letter setting forth, among other things, the name of such Holder, the principal amount of Registrable Securities delivered for exchange and a statement that such Holder is withdrawing his election to have such Securities exchanged. As soon as practicable after the last Exchange Date, the Company shall: (i) accept for exchange Registrable Securities or portions thereof validly tendered and not withdrawn pursuant to the Exchange Offer; and (ii) deliver, or cause to be delivered, to the Trustee for cancellation all Registrable Securities or portions thereof so 5 accepted for exchange by the Company and issue, and cause the Trustee to promptly authenticate and mail to each Holder, an Exchange Security equal in principal amount to the principal amount of the Registrable Securities surrendered by such Holder. The Company shall use its reasonable best efforts to complete the Exchange Offer as provided above and shall comply with the applicable requirements of the 1933 Act, the 1934 Act and other applicable laws and regulations in connection with the Exchange Offer. The Exchange Offer shall not be subject to any conditions, other than that the Exchange Offer does not violate applicable law or any applicable interpretation of the Staff of the SEC. The Company shall inform the Purchasers of the names and addresses of the Holders to whom the Exchange Offer is made, and the Purchasers shall have the right, subject to applicable law, to contact such Holders and otherwise facilitate the tender of Registrable Securities in the Exchange Offer. (b) In the event that (i) the Company determines that the Exchange Offer Registration provided for in Section 2(a) above is not available or may not be consummated as soon as practicable after the last Exchange Date because it would violate applicable law or the applicable interpretations of the Staff of the SEC or (ii) the Exchange Offer has been completed and in the opinion of counsel for the Purchasers a Registration Statement must be filed and a Prospectus must be delivered by any Purchaser in connection with any offering or sale of Registrable Securities, the Company may cause to be filed after such determination or notice of such opinion of counsel is given to the Company, as the case may be, a Shelf Registration Statement providing for the sale by the Holders of all of the Registrable Securities and to have such Shelf Registration Statement declared effective by the SEC. In the event the Company files a Shelf Registration Statement solely as a result of the matters referred to in clause (ii) of the preceding sentence, the Company shall use its reasonable best efforts to file and have declared effective by the SEC both an Exchange Offer Registration Statement pursuant to Section 2(a) with respect to all Registrable Securities and a Shelf Registration Statement (which may be a combined Registration Statement with the Exchange Offer Registration Statement) with respect to offers and sales of Registrable Securities held by the Purchasers after completion of the Exchange Offer. If the Company has determined to file and use its reasonable best efforts to have the Shelf Registration Statement declared effective, the Company agrees to use its reasonable best efforts to keep the Shelf Registration Statement continuously effective until the expiration of the period referred to in Rule 144(k) with respect to the Registrable Securities or such shorter period that will terminate when all of the Registrable Securities covered by the Shelf Registration Statement have been sold pursuant to the Shelf Registration Statement. The Company further agrees to supplement or amend the Shelf 6 Registration Statement if required by the rules, regulations or instructions applicable to the registration form used by the Company for such Shelf Registration Statement or by the 1933 Act or by any other rules and regulations thereunder for shelf registration or if reasonably requested by a Holder with respect to information relating to such Holder, and to use its reasonable best efforts to cause any such amendment to become effective and such Shelf Registration Statement to become usable as soon as thereafter practicable. The Company agrees to furnish to the Holders of Registrable Securities copies of any such supplement or amendment promptly after its being used or filed with the SEC. (c) The Company shall pay all Registration Expenses in connection with the registration pursuant to Section 2(a) and Section 2(b). Each Holder shall pay all underwriting discounts and commissions and transfer taxes, if any, relating to the sale or disposition of such Holder's Registrable Securities pursuant to the Shelf Registration Statement. (d) An Exchange Offer Registration Statement pursuant to Section 2(a) hereof or a Shelf Registration Statement pursuant to Section 2(b) hereof will not be deemed to have become effective unless it has been declared effective by the SEC; provided, however, that, if, after it has been declared effective, the offering of Registrable Securities pursuant to a Shelf Registration Statement is interfered with by any stop order, injunction or other order or requirement of the SEC or any other governmental agency or court, such Registration Statement will be deemed not to have become effective during the period of such interference until the offering of Registrable Securities pursuant to such Registration Statement may legally resume. In the event the Exchange Offer is not consummated and the Shelf Registration Statement is not declared effective on or prior to July 14, 2003, the interest rate on the Securities will be increased by 0.5% per annum until (i) the Exchange Offer is consummated, (ii) the Shelf Registration Statement is declared effective by the SEC, or (iii) the Securities shall have ceased to be outstanding. (e) Without limiting the remedies available to the Purchasers and the Holders, the Company acknowledges that any failure by the Company to comply with its obligations under Section 2(a) and Section 2(b) hereof may result in material irreparable injury to the Purchasers or the Holders for which there is no adequate remedy at law, that it will not be possible to measure damages for such injuries precisely and that, in the event of any such failure, the Purchasers or any Holder may obtain such relief as may be required to specifically enforce the Company's obligations under Section 2(a) and Section 2(b) hereof. 3. REGISTRATION PROCEDURES. 7 In connection with the obligations of the Company with respect to the Registration Statements pursuant to Section 2(a) and Section 2(b) (if the Company has determined to file a Shelf Registration Statement and use its reasonable best efforts to have such Shelf Registration Statement declared effective) hereof, the Company shall as expeditiously as possible: (a) prepare and file with the SEC a Registration Statement on the appropriate form under the 1933 Act, which form (x) shall be selected by the Company and (y) shall, in the case of a Shelf Registration, be available for the sale of the Registrable Securities by the selling Holders thereof and (z) shall comply as to form in all material respects with the requirements of the applicable form and include all financial statements required by the SEC to be filed therewith, and use its reasonable best efforts to have such Registration Statement become effective and remain effective in accordance with Section 2 hereof; (b) prepare and file with the SEC such amendments and post-effective amendments to each Registration Statement as may be necessary to keep such Registration Statement effective for the applicable period and cause each Prospectus to be supplemented by any required prospectus supplement and, as so supplemented, to be filed pursuant to Rule 424 under the 1933 Act; (c) in the case of a Shelf Registration, furnish to each Holder of Registrable Securities, to counsel for the Purchasers, to counsel for the Holders and to each Underwriter of an Underwritten Offering of Registrable Securities, if any, without charge, as many copies of each Prospectus, including each preliminary Prospectus, and any amendment or supplement thereto and such other documents as such Holder or Underwriter may reasonably request, in order to facilitate the public sale or other disposition of the Registrable Securities; and the Company consents to the use of such Prospectus and any amendment or supplement thereto in accordance with applicable law by each of the selling Holders of Registrable Securities and any such Underwriters in connection with the offering and sale of the Registrable Securities covered by and in the manner described in such Prospectus or any amendment or supplement thereto in accordance with applicable law; (d) use its reasonable best efforts to register or qualify the Registrable Securities under all applicable state securities or "BLUE SKY" laws of such jurisdictions as any Holder of Registrable Securities covered by a Registration Statement shall reasonably request in writing by the time the applicable Registration Statement is declared effective by the SEC, to cooperate with such Holders in connection with any filings required to be 8 made with the National Association of Securities Dealers, Inc. and do any and all other acts and things which may be reasonably necessary or advisable to enable such Holder to consummate the disposition in each such jurisdiction of such Registrable Securities owned by such Holder; provided, however, that the Company shall not be required to (i) qualify as a foreign corporation or as a dealer in securities in any jurisdiction where it would not otherwise be required to qualify but for this Section 3(d), (ii) file any general consent to service of process or (iii) subject itself to taxation in any such jurisdiction if it is not so subject; (e) in the case of a Shelf Registration, notify each Holder of Registrable Securities, counsel for the Holders and counsel for the Purchasers promptly and, if requested by any such Holder or counsel, confirm such advice in writing (i) when a Registration Statement has become effective and when any post-effective amendment thereto has been filed and becomes effective, (ii) of any request by the SEC or any state securities authority for amendments and supplements to a Registration Statement and Prospectus or for additional information after the Registration Statement has become effective, (iii) of the issuance by the SEC or any state securities authority of any stop order suspending the effectiveness of a Registration Statement or the initiation of any proceedings for that purpose, (iv) if, between the effective date of a Registration Statement and the closing of any sale of Registrable Securities covered thereby, the representations and warranties of the Company contained in any underwriting agreement, securities sales agreement or other similar agreement, if any, relating to the offering cease to be true and correct in all material respects or if the Company receives any notification with respect to the suspension of the qualification of the Registrable Securities for sale in any jurisdiction or the initiation of any proceeding for such purpose, (v) of the happening of any event during the period a Shelf Registration Statement is effective which makes any statement made in such Registration Statement or the related Prospectus untrue in any material respect or which requires the making of any changes in such Registration Statement or Prospectus in order to make the statements therein not misleading and (vi) of any determination by the Company that a post-effective amendment to a Registration Statement would be appropriate; (f) make every reasonable effort to obtain the withdrawal of any order suspending the effectiveness of a Registration Statement at the earliest possible moment and provide immediate notice to each Holder of the withdrawal of any such order; (g) in the case of a Shelf Registration, furnish to each Holder of Registrable Securities, without charge, at least one conformed copy of 9 each Registration Statement and any post-effective amendment thereto (without documents incorporated therein by reference or exhibits thereto, unless requested), unless such documents are available on the SEC's EDGAR Website; (h) in the case of a Shelf Registration, cooperate with the selling Holders of Registrable Securities to facilitate the timely preparation and delivery of certificates representing Registrable Securities to be sold and not bearing any restrictive legends and enable such Registrable Securities to be in such denominations (consistent with the provisions of the Indenture) and registered in such names as the selling Holders may reasonably request at least one business day prior to the closing of any sale of Registrable Securities; (i) in the case of a Shelf Registration, upon the occurrence of any event contemplated by Section 3(e)(v) hereof, use its reasonable best efforts to prepare and file with the SEC a supplement or post-effective amendment to a Registration Statement or the related Prospectus or any document incorporated therein by reference or file any other required document so that, as thereafter delivered to the purchasers of the Registrable Securities, such Prospectus will not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in light of the circumstances under which they were made, not misleading. The Company agrees to notify the Holders to suspend use of the Prospectus as promptly as practicable after the occurrence of such an event, and the Holders hereby agree to suspend use of the Prospectus until the Company has amended or supplemented the Prospectus to correct such misstatement or omission; (j) a reasonable time prior to the filing of any Registration Statement, any Prospectus, any amendment to a Registration Statement or amendment or supplement to a Prospectus or any document which is to be incorporated by reference into a Registration Statement or a Prospectus after the initial filing of a Registration Statement, provide the Purchasers and its counsel (and, in the case of a Shelf Registration Statement, the counsel to the Holders) a reasonable opportunity to comment on such document; (k) obtain a CUSIP number for all Exchange Securities or Registrable Securities, as the case may be, not later than the effective date of a Registration Statement; (l) cause the Indenture to be qualified under the Trust Indenture Act of 1939, as amended (the "TIA"), in connection with the registration of the Exchange Securities or Registrable Securities, as the case may be, 10 cooperate with the Trustee and the Holders to effect such changes to the Indenture as may be required for the Indenture to be so qualified in accordance with the terms of the TIA and execute, and use its reasonable best efforts to cause the Trustee to execute, all documents as may be required to effect such changes and all other forms and documents required to be filed with the SEC to enable the Indenture to be so qualified in a timely manner; (m) in the case of a Shelf Registration, make available for inspection by the Holders of the Registrable Securities, any Underwriter participating in any disposition pursuant to such Shelf Registration Statement, and attorneys and accountants designated by the Holders, at reasonable times and in a reasonable manner, all financial and other records, pertinent documents and properties of the Company, and cause the respective officers, directors and employees of the Company to supply all information reasonably requested by any such representative, Underwriter, attorney or accountant in connection with a Shelf Registration Statement; provided, however, that the foregoing inspection and gathering of information shall be coordinated, on behalf of any Underwriter, by such Underwriter and, on behalf of the other parties, by one counsel designated by and on behalf of such other parties; and provided further that such persons shall first agree in writing with the Company that any information that is reasonably and in good faith designated by the Company as confidential at the time of delivery of such information shall be kept confidential by such persons unless (i) disclosure of such information is required by court or administrative order or is necessary to respond to inquiries of regulatory authorities, (ii) disclosure of such information is required by law (including any disclosure requirements pursuant to Federal securities laws in connection with the filing of the Shelf Registration Statement or the use of any Prospectus thereunder), (iii) such information becomes generally available to the public other than as a result of disclosure, directly or indirectly, or failure to safeguard by any such person, or (iv) such information becomes available to any such person on a non-confidential basis from a source other than the Company and such source is not bound by a confidentiality agreement or other obligation not to disclose such information; (n) in the case of a Shelf Registration, use its reasonable best efforts to cause all Registrable Securities to be listed on any securities exchange or any automated quotation system on which similar securities issued by the Company are then listed if requested by the Majority Holders, to the extent such Registrable Securities satisfy applicable listing requirements; (o) use its reasonable best efforts to cause the Exchange 11 Securities or Registrable Securities, as the case may be, to be rated by two nationally recognized statistical rating organizations (as such term is defined in Rule 436(g)(2) under the 1933 Act); (p) if reasonably requested by any Holder of Registrable Securities covered by a Registration Statement, (i) promptly incorporate in a Prospectus supplement or post-effective amendment such information with respect to such Holder as such Holder reasonably requests to be included therein and (ii) make all required filings of such Prospectus supplement or such post-effective amendment as soon as the Company has received notification of the matters to be incorporated in such filing; and (q) in the case of a Shelf Registration, use its reasonable best efforts to enter into such customary agreements and take all such other actions in connection therewith (including those requested by the Holders of a majority of the Registrable Securities being sold) in order to expedite or facilitate the disposition of such Registrable Securities in an Underwritten Offering and in such connection, (i) to the extent possible, make such representations and warranties to the Holders and any Underwriters of such Registrable Securities with respect to the business of the Company and its subsidiaries, the Registration Statement, Prospectus and documents incorporated by reference or deemed incorporated by reference, if any, in each case, in form, substance and scope as are customarily made by issuers to underwriters in underwritten offerings, (ii) obtain opinions of counsel to the Company (which counsel and opinions, in form, scope and substance, shall be reasonably satisfactory to the Holders and such Underwriters and their respective counsel) addressed to each selling Holder and Underwriter of Registrable Securities, covering the matters customarily covered in opinions requested in underwritten offerings, (iii) obtain "COLD COMFORT" letters from the independent certified public accountants of the Company (and, if necessary, any other certified public accountant of any subsidiary of the Company, or of any business acquired by the Company for which financial statements and financial data are or are required to be included in the Registration Statement) addressed to each selling Holder and Underwriter of Registrable Securities, such letters to be in customary form and covering matters of the type customarily covered in "COLD COMFORT" letters in connection with underwritten offerings, and (iv) deliver such documents and certificates as may be reasonably requested by the Holders of a majority in principal amount of the Registrable Securities being sold or the Underwriters, and which are customarily delivered in underwritten offerings, to evidence the continued validity of the representations and warranties of the Company made pursuant to clause (i) above and to evidence compliance with any customary conditions contained in an underwriting agreement. 12 In the case of a Shelf Registration Statement, the Company may require each Holder of Registrable Securities to furnish to the Company such information regarding the Holder and the proposed distribution by such Holder of such Registrable Securities as the Company may from time to time reasonably request in writing. Each Holder agrees to provide such information to the Company. In the case of a Shelf Registration Statement, each Holder agrees that, upon receipt of any notice from the Company of the happening of any event of the kind described in Section 3(e)(v) hereof, such Holder will forthwith discontinue disposition of Registrable Securities pursuant to a Registration Statement until such Holder's receipt of the copies of the supplemented or amended Prospectus contemplated by Section 3(i) hereof, and, if so directed by the Company, such Holder will deliver to the Company (at its expense) all copies in its possession, other than permanent file copies then in such Holder's possession, of the Prospectus covering such Registrable Securities current at the time of receipt of such notice. If the Company shall give any such notice to suspend the disposition of Registrable Securities pursuant to a Registration Statement, the Company shall extend the period during which the Registration Statement shall be maintained effective pursuant to this Agreement by the number of days during the period from and including the date of the giving of such notice to and including the date when the Holders shall have received copies of the supplemented or amended Prospectus necessary to resume such dispositions and any such suspensions may not exceed 90 days in the aggregate during any 365 day period. The Holders of Registrable Securities covered by a Shelf Registration Statement who desire to do so may sell such Registrable Securities in an Underwritten Offering. In any such Underwritten Offering, the investment banker or investment bankers and manager or managers (the "UNDERWRITERS") that will administer the offering will be selected by the Majority Holders of the Registrable Securities included in such offering. 4. PARTICIPATION OF BROKER-DEALERS IN EXCHANGE OFFER. (a) The parties hereto understand that the Staff of the SEC has taken the position that any broker-dealer that receives Exchange Securities for its own account in the Exchange Offer in exchange for Securities that were acquired by such broker-dealer as a result of market-making or other trading activities (a "Participating Broker-Dealer"), may be deemed to be an "underwriter" within the meaning of the 1933 Act and must deliver a prospectus meeting the requirements of the 1933 Act in connection with any resale of such Exchange Securities. The Company understands that it is currently the Staff's position that if the Prospectus contained in the Exchange Offer Registration Statement includes a plan of distribution containing a statement to the above effect and the means by 13 which Participating Broker-Dealers may resell the Exchange Securities, without naming the Participating Broker-Dealers or specifying the amount of Exchange Securities owned by them, such Prospectus may be delivered by Participating Broker-Dealers to satisfy their prospectus delivery obligation under the 1933 Act in connection with resales of Exchange Securities for their own accounts, so long as the Prospectus otherwise meets the requirements of the 1933 Act. (b) In light of the above, notwithstanding the other provisions of this Agreement, the Company agrees that the provisions of this Agreement as they relate to a Shelf Registration shall also apply to an Exchange Offer Registration to the extent, and with such reasonable modifications thereto, as may be reasonably requested by the Purchasers or by one or more Participating Broker-Dealers, in each case as provided in clause (ii) below, in order to expedite or facilitate the disposition of any Exchange Securities by Participating Broker-Dealers consistent with the positions of the Staff recited in Section 4(a) above; PROVIDED that: (i) the Company shall not be required to amend or supplement the Prospectus contained in the Exchange Offer Registration Statement, as would otherwise be contemplated by Section 3(i), for a period exceeding 180 days after the last Exchange Date (as such period may be extended pursuant to the penultimate paragraph of Section 3 of this Agreement) and Participating Broker-Dealers shall not be authorized by the Company to deliver and shall not deliver such Prospectus after such period in connection with the resales contemplated by this Section 4; and (ii) the application of the Shelf Registration procedures set forth in Section 3 of this Agreement to an Exchange Offer Registration, to the extent not required by the positions of the Staff of the SEC or the 1933 Act and the rules and regulations thereunder, will be in conformity with the reasonable request in writing to the Company by the Purchasers or with the reasonable request in writing to the Company by one or more broker-dealers who certify to the Purchasers and the Company in writing that they anticipate that they will be Participating Broker-Dealers; and PROVIDED FURTHER that, in connection with such application of the Shelf Registration procedures set forth in Section 3 to an Exchange Offer Registration, the Company shall be obligated (x) to deal only with one entity representing the Participating Broker-Dealers, which shall be Salomon Smith Barney Inc. unless it elects not to act as such representative, (y) to pay the fees and expenses of only one counsel representing the Participating Broker-Dealers, which shall be counsel to the Purchasers unless such counsel elects not to 14 so act and (z) to cause to be delivered only one, if any, "cold comfort" letter with respect to the Prospectus in the form existing on the last Exchange Date and with respect to each subsequent amendment or supplement, if any, effected during the period specified in clause (i) above. For purposes of this Section 4(b), all references in Section 3 to the "Majority Holders" shall be deemed to mean, solely insofar as relates to this Section 4(b), the Participating Broker-Dealers who are the Holders of the majority in aggregate principal amount of the Exchange Securities which are Registrable Securities (c) The Purchasers shall have no liability to the Company, other than as Holders in accordance with the terms hereof, or to any other Holder with respect to any request that they may make pursuant to Section 4(b) above. 5. INDEMNIFICATION AND CONTRIBUTION. (a) The Company agrees to indemnify and hold harmless each Purchaser, each Holder and each Person, if any, who controls any Purchaser or any such Holder within the meaning of either Section 15 of the 1933 Act or Section 20 of the 1934 Act, from and against all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement (or any amendment thereto) pursuant to which Exchange Securities or Registrable Securities were registered under the 1933 Act, including all documents incorporated therein by reference, or caused by any omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein not misleading, or caused by any untrue statement or alleged untrue statement of a material fact contained in any Prospectus (as amended or supplemented if the Company shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state a material fact necessary to make the statements therein in light of the circumstances under which they were made not misleading, except insofar as such losses, claims, damages or liabilities are caused by any such untrue statement or omission or alleged untrue statement or omission based upon information relating to any Purchaser or any Holder furnished to the Company in writing by such Purchaser or any selling Holder expressly for use therein, provided, however, that the foregoing indemnity with respect to any such Registration Statement or Prospectus, including any document incorporated therein by reference, shall not inure to the benefit of any 15 Purchaser or any Holder (or to the benefit of any Person controlling such Holder) from whom the Person asserting any such losses, claims, damages or liabilities purchased the Registrable Securities if such untrue statement or omission or alleged untrue statement or alleged omission made in any such Registration Statement or Prospectus, including any document incorporated therein by reference, is eliminated or remedied in an amendment or supplement thereto and a copy of the amended or supplemented Registration Statement or Prospectus has not been furnished to such person on or prior to the written confirmation of the sale of such Registrable Securities to such Person. In connection with any Underwritten Offering permitted by Section 3, the Company will also indemnify the Underwriters, if any, selling brokers, dealers and similar securities industry professionals participating in the distribution, their officers and directors and each Person who controls such Persons (within the meaning of the 1933 Act and the 1934 Act) to the same extent as provided above with respect to the indemnification of the Holders, if requested in connection with any Registration Statement. (b) Each Holder agrees, severally and not jointly, to indemnify and hold harmless the Company, the Purchasers and the other selling Holders, and each of their respective directors, officers of the Company who sign the Registration Statement and each Person, if any, who controls the Company, the Purchasers and any other selling Holder within the meaning of either Section 15 of the 1933 Act or Section 20 of the 1934 Act to the same extent as the foregoing indemnity from the Company to the Purchasers and the Holders, but only with reference to information relating to such Holder furnished to the Company in writing by such Holder expressly for use in any Registration Statement (or any amendment thereto) or any Prospectus (or any amendment or supplement thereto). (c) In case any proceeding (including any governmental investigation) shall be instituted involving any Person in respect of which indemnity may be sought pursuant to either paragraph (a) or paragraph (b) of this Section 5, such Person (the "INDEMNIFIED PARTY") shall promptly notify the Person against whom such indemnity may be sought (the "INDEMNIFYING PARTY") in writing and the indemnifying party, upon request of the indemnified party, shall retain counsel reasonably satisfactory to the indemnified party to represent the indemnified party and any others the indemnifying party may designate in such proceeding and shall pay the fees and disbursements of such counsel related to such proceeding. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified party unless (i) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel or (ii) the named parties to any such 16 proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood that the indemnifying party shall not, in connection with any proceeding or related proceedings in the same jurisdiction, be liable for (A) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Purchasers and all Persons, if any, who control any Purchaser within the meaning of either Section 15 of the 1933 Act or Section 20 of the 1934 Act, (B) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Company, its directors, its officers who sign the Registration Statement and each Person, if any, who controls the Company within the meaning of either such Section and (C) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Holders and all Persons, if any, who control any Holders within the meaning of either such Section, and that all such fees and expenses shall be reimbursed as they are incurred. In such case involving the Purchasers and Persons who control any Purchaser, such firm shall be designated in writing by such Purchaser. In such case involving the Holders and such Persons who control any Holder, such firm shall be designated in writing by the Majority Holders. In all other cases, such firm shall be designated by the Company. The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent but, if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel as contemplated by the second and third sentences of this paragraph, the indemnifying party agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by such indemnifying party of the aforesaid request and (ii) such indemnifying party shall not have reimbursed the indemnified party for such fees and expenses of counsel in accordance with such request prior to the date of such settlement. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened proceeding in respect of which such indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party, unless such settlement includes an unconditional release of such indemnified party from all liability on claims that are the subject matter of such proceeding. (d) If the indemnification provided for in paragraph (a) or paragraph (b) of this Section 5 is unavailable to an indemnified party or 17 insufficient in respect of any losses, claims, damages or liabilities referred to therein, then each indemnifying party under such paragraph, in lieu of indemnifying such indemnified party thereunder, shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities in such proportion as is appropriate to reflect the relative fault of the indemnifying party or parties on the one hand and of the indemnified party or parties on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant considerations. The relative fault of the Company, the Holders and the Underwriters, if any, shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or by the Holders or the Underwriters, if any, and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Holders' respective obligations to contribute pursuant to this Section 5(d) are several in proportion to the respective principal amount of Registrable Securities of such Holder that were registered pursuant to a Registration Statement. (e) The Company and each Holder agree that it would not be just or equitable if contribution pursuant to this Section 5 were determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in paragraph (d) above. The amount paid or payable by an indemnified party as a result of the losses, claims, damages and liabilities referred to in paragraph (d) above shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 5, no Holder shall be required to indemnify or contribute any amount in excess of the amount by which the total price at which Registrable Securities were sold by such Holder exceeds the amount of any damages that such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation. The remedies provided for in this Section 5 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any indemnified party at law or in equity. The indemnity and contribution provisions contained in this Section 5 shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of the Purchasers, 18 any Holder or any Person controlling any Purchaser or any Holder, or by or on behalf of the Company, its officers or directors or any Person controlling the Company, (iii) acceptance of any of the Exchange Securities and (iv) any sale of Registrable Securities pursuant to a Shelf Registration Statement. 6. MISCELLANEOUS. (a) No Inconsistent Agreements. The Company has not entered into, and on or after the date of this Agreement will not enter into, any agreement which breaches the rights granted to the Holders of Registrable Securities in this Agreement or the provisions hereof. The rights granted to the Holders hereunder do not breach the rights granted to the holders of the Company's other issued and outstanding securities under any such agreements. (b) Amendments and Waivers. The provisions of this Agreement, including the provisions of this sentence, may not be amended, modified or supplemented, and waivers or consents to departures from the provisions hereof may not be given unless the Company has obtained the written consent of Holders of at least a majority in aggregate principal amount of the outstanding Registrable Securities affected by such amendment, modification, supplement, waiver or consent; provided, however, that no amendment, modification, supplement, waiver or consent to any departure from the provisions of Section 5 hereof shall be effective as against any Holder of Registrable Securities unless consented to in writing by such Holder. (c) Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand-delivery, registered first-class mail, telex, telecopier, or any courier guaranteeing overnight delivery (i) if to a Holder, at the most current address given by such Holder to the Company by means of a notice given in accordance with the provisions of this Section 6(c), which address initially is, the address of the representatives of the Purchasers set forth in the Purchase Agreement; and (ii) if to the Company, initially at the Company's address set forth in the Purchase Agreement and thereafter at such other address, notice of which is given in accordance with the provisions of this Section 6(c). All such notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five business days after being deposited in the mail, postage prepaid, if mailed; when answered back, if telexed; when receipt is acknowledged, if telecopied; and on the next business day if timely delivered to an air courier guaranteeing overnight delivery. 19 Copies of all such notices, demands, or other communications shall be concurrently delivered by the Person giving the same to the Trustee, at the address specified in the Indenture. (d) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors, assigns and transferees of each of the parties, including, without limitation and without the need for an express assignment, subsequent Holders; provided that nothing herein shall be deemed to permit any assignment, transfer or other disposition of Registrable Securities in violation of the terms of the Purchase Agreement. If any transferee of any Holder shall acquire Registrable Securities, in any manner, whether by operation of law or otherwise, such Registrable Securities shall be held subject to all of the terms of this Agreement, and by taking and holding such Registrable Securities such Person shall be conclusively deemed to have agreed to be bound by and to perform all of the terms and provisions of this Agreement and such Person shall be entitled to receive the benefits hereof. Each Purchaser (in its capacity as Purchaser) shall have no liability or obligation to the Company with respect to any failure by a Holder to comply with, or any breach by any Holder of, any of the obligations of such Holder under this Agreement. (e) Purchases and Sales of Securities. The Company shall not, and shall use its reasonable best efforts to cause its affiliates (as defined in Rule 405 under the 1933 Act) not to, purchase and then resell or otherwise transfer any Securities (other than to another affiliate of the Company). (f) Third Party Beneficiary. The Holders shall be third party beneficiaries to the agreements made hereunder between the Company, on the one hand, and the Purchasers, on the other hand, and shall have the right to enforce such agreements directly to the extent it deems such enforcement necessary or advisable to protect its rights or the rights of Holders hereunder. (g) Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. (h) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof. (i) Governing Law. This Agreement shall be governed by the laws of the State of New York. 20 (j) Severability. In the event that any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions contained herein shall not be affected or impaired thereby. 21 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above. AON CORPORATION By: /s/ Harvey N. Medvin ---------------------------- Name: Title: Confirmed and accepted as of the date first above written: Salomon Smith Barney Inc. Credit Suisse First Boston Corporation For themselves and on behalf of the several purchasers named in Schedule I hereto. SALOMON SMITH BARNEY INC. By: /s/ Anne Kronenberg ------------------------------- Name: Title: CREDIT SUISSE FIRST BOSTON CORPORATION By: /s/ Sharon Harrison ------------------------------- Name: Sharon Harrison Title: Director 22 SCHEDULE I PURCHASER Salomon Smith Barney Inc. Credit Suisse First Boston Corporation BNY Capital Markets, Inc. Wachovia Securities, Inc. 23 24 EX-5 5 a2101105zex-5.txt EX-5 EXHIBIT 5 OPINION OF RICHARD E. BARRY March 7, 2003 Aon Corporation 200 East Randolph Street Chicago, Illinois 60601 Re: $225,000,000 Aggregate Principal Amount of 7.375% Senior Notes due 2012 ----------------------------------------------------------------------- Ladies and Gentlemen: I am Senior Counsel and Assistant Secretary of Aon Corporation (the "Company"). I refer to the Registration Statement on Form S-4 (the "Registration Statement") being filed by the Company with the Securities and Exchange Commission (the "SEC") under the Securities Act of 1933, as amended (the "Securities Act"), to register up to $225,000,000 aggregate principal amount of the Company's 7.375% Senior Notes due 2012 (the "Exchange Notes") to be issued in an exchange offer for the $225,000,000 aggregate principal amount of the Company's outstanding 7.375% Senior Notes due 2012 (the "Original Notes"). The Original Notes and the Exchange Notes are referred to herein collectively as the "Notes." Original Notes that are accepted for exchange for Exchange Notes will be cancelled and retired. The Original Notes were and the Exchange Notes will be issued pursuant to an Indenture dated as of December 16, 2002 (the "Indenture") between the Company and The Bank of New York, as trustee. The Original Notes were issued and sold on December 16, 2002 to Salomon Smith Barney Inc., Credit Suisse First Boston Corporation, BNY Capital Markets, Inc. and Wachovia Securities, Inc., the initial purchasers thereof (the "Initial Purchasers"), without registration under the Securities Act, and were offered and sold by the Initial Purchasers to qualified institutional buyers in reliance on Rule 144A under the Securities Act. In connection with the offer and sale of the Original Notes, the Company entered into a Registration Rights Agreement dated as of December 16, 2002 (the "Registration Rights Agreement") with the Initial Purchasers, providing for the registration or exchange of the Original Notes. The Registration Statement is being filed pursuant to the Registration Rights Agreement. I am familiar with the proceedings to date with respect to the proposed issuance of the Exchange Notes and have examined such records, documents and questions of law, and satisfied myself as to such matters of fact, as I have considered relevant and necessary as a basis for this opinion. In rendering the opinions expressed below, I have assumed the authenticity of all documents submitted to me as originals and the conformity to the originals of all documents submitted to me as copies. In addition, I have assumed and have not verified the accuracy as to factual matters of each document I reviewed. Based on the foregoing, I am of the opinion that: 1. The Company is duly incorporated and validly existing under the laws of the State of Delaware. 2. The Original Notes have been duly authorized and legally issued and constitute valid and binding obligations of the Company (except to the extent enforceability may be limited by Aon Corporation March 7, 2003 Page 2 applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer or other similar laws affecting the enforcement of creditors' rights generally and by the effect of general principles of equity, regardless of whether enforceability is considered in a proceeding in equity or at law). 3. The Exchange Notes have been duly authorized and, when executed, authenticated and delivered pursuant to the Indenture and the Registration Rights Agreement, will be legally issued and will constitute valid and binding obligations of the Company (except to the extent enforceability may be limited by applicable bankruptcy, insolvency, moratorium, fraudulent transfer or other similar laws affecting the enforcement of creditors' rights generally and by the effect of general principles of equity, regardless of whether enforceability is considered in a proceeding in equity or at law). This opinion letter is limited to the General Corporation Law of the State of Delaware and the laws of the State of Illinois. I note that the Indenture, the Original Notes and the Exchange Notes are expressly governed by the laws of the State of New York, and I have assumed, without investigation, that the substantive laws of the State of Illinois are substantially identical to those of the State of New York. I do not find it necessary for the purposes of this opinion letter to cover, and accordingly I express no opinion as to, the application of the securities or blue sky laws of the various states or the District of Columbia to the issuance of the Exchange Notes in exchange for the Original Notes. I hereby consent to the filing of this opinion letter as an Exhibit to the Registration Statement and to all references to me under the caption "Legal Matters" in the Prospectus forming a part of the Registration Statement. In giving such consent, I do not thereby admit that I am within the category of persons whose consent is required by Section 7 of the Securities Act or the related rules and regulations promulgated by the SEC. Very truly yours, /s/ Richard E. Barry EX-15 6 a2101105zex-15.txt EX-15 EXHIBIT 15 March 6, 2003 Board of Directors and Stockholders Aon Corporation We are aware of the incorporation by reference in this Registration Statement (Form S-4) and related Prospectus of Aon Corporation for the registration of $225,000,000 of 7.375% senior notes due 2012 of our reports dated April 29, 2002 (except for Note 2, as to which the date is August 14, 2002), August 14, 2002 and November 11, 2002 relating to the unaudited condensed consolidated interim financial statements of Aon Corporation which are included in its Form 10-Q/A for the quarter ended March 31, 2002 and Form 10-Q for the quarters ended June 30, 2002 and September 30, 2002. /s/ Ernst & Young LLP EX-23.B 7 a2101105zex-23_b.txt EX-23(B) EXHIBIT 23(b) CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the reference to our firm under the caption "Experts" in this Registration Statement (Form S-4) and related Prospectus of Aon Corporation for the registration of $225,000,000 of 7.375% senior notes due 2012 and to the incorporation by reference therein of our report dated February 12, 2002 (except for Note 1, as to which the date is August 14, 2002), with respect to the consolidated financial statements and the related financial statement schedules (as restated) of Aon Corporation included in its Annual Report (Form 10-K/A) for the year ended December 31, 2001 filed with the Securities and Exchange Commission. /s/ Ernst & Young LLP Chicago, Illinois March 6, 2003 EX-24 8 a2101105zex-24.txt EX-24 EXHIBIT 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Edgar D. Jannotta --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Lester B. Knight --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Perry J. Lewis --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ R. Eden Martin --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Andrew J. McKenna --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Robert S. Morrison --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the ("Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Richard C. Notebaert -------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Michael D. O'Halleran -------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ John W. Rogers, Jr. --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Patrick G. Ryan ---------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Patrick G. Ryan, Jr. --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ George A. Schaefer ----------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran and Harvey N. Medvin, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and all post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Raymond I. Skilling --------------------------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below constitutes and appoints Patrick G. Ryan, Michael D. O'Halleran, Harvey N. Medvin and Raymond I. Skilling, and each of them, with full power to act without the others, his true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution for the undersigned and in the undersigned's name, place and stead, in any and all capacities, to sign a Registration Statement on Form S-4 (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), for the registration of up to $225,000,000 aggregate principal amount of 7.375% senior notes due 2012 and any and all amendments and supplements thereto or to the prospectus contained therein (including all pre-effective and post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and any and all documents relating to the qualification or registration under state Blue Sky or securities laws of such securities, granting unto such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has signed his/her name effective as of January 17, 2003. /s/ Carolyn Y. Woo --------------------------- EX-25 9 a2101105zex-25.txt EX-25 EXHIBIT 25 ================================================================================ FORM T-1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) |__| ---------------- THE BANK OF NEW YORK (Exact name of trustee as specified in its charter) New York 13-5160382 (State of incorporation (I.R.S. employer if not a U.S. national bank) identification no.) One Wall Street, New York, N.Y. 10286 (Address of principal executive offices) (Zip code) ---------------- Aon CORPORATION (Exact name of obligor as specified in its charter) Delaware 36-3051915 (State or other jurisdiction of (I.R.S. employer incorporation or organization) identification no.) 200 East Randolph Street Chicago, Illinois 60601 (Address of principal executive offices) (Zip code) ---------------- 7.375% Senior Notes Due 2012 (Title of the indenture securities) ================================================================================ 1. GENERAL INFORMATION. FURNISH THE FOLLOWING INFORMATION AS TO THE TRUSTEE: (a) NAME AND ADDRESS OF EACH EXAMINING OR SUPERVISING AUTHORITY TO WHICH IT IS SUBJECT.
--------------------------------------------------------------------------- Name Address --------------------------------------------------------------------------- Superintendent of Banks of the State of 2 Rector Street, New York, New York N.Y. 10006, and Albany, N.Y. 12203 Federal Reserve Bank of New York 33 Liberty Plaza, New York, N.Y. 10045 Federal Deposit Insurance Corporation Washington, D.C. 20429 New York Clearing House Association New York, New York 10005
(b) WHETHER IT IS AUTHORIZED TO EXERCISE CORPORATE TRUST POWERS. Yes. 2. AFFILIATIONS WITH OBLIGOR. IF THE OBLIGOR IS AN AFFILIATE OF THE TRUSTEE, DESCRIBE EACH SUCH AFFILIATION. None. 16. LIST OF EXHIBITS. EXHIBITS IDENTIFIED IN PARENTHESES BELOW, ON FILE WITH THE COMMISSION, ARE INCORPORATED HEREIN BY REFERENCE AS AN EXHIBIT HERETO, PURSUANT TO RULE 7a-29 UNDER THE TRUST INDENTURE ACT OF 1939 (THE "ACT") AND 17 C.F.R. 229.10(d). 1. A copy of the Organization Certificate of The Bank of New York (formerly Irving Trust Company) as now in effect, which contains the authority to commence business and a grant of powers to exercise corporate trust powers. (Exhibit 1 to Amendment No. 1 to Form T-1 filed with Registration Statement No. 33-6215, Exhibits 1a and 1b to Form T-1 filed with Registration Statement No. 33-21672 and Exhibit 1 to Form T-1 filed with Registration Statement No. 33-29637.) 4. A copy of the existing By-laws of the Trustee. (Exhibit 4 to Form T-1 filed with Registration Statement No. 33-31019.) 6. The consent of the Trustee required by Section 321(b) of the Act. (Exhibit 6 to Form T-1 filed with Registration Statement No. 33-44051.) 7. A copy of the latest report of condition of the Trustee published pursuant to law or to the requirements of its supervising or examining authority. 2 SIGNATURE Pursuant to the requirements of the Act, the Trustee, The Bank of New York, a corporation organized and existing under the laws of the State of New York, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in The City of New York, and State of New York, on the 16th day of January, 2003. THE BANK OF NEW YORK By: /s/ Robert A. Massimillo ------------------------ Name: ROBERT A. MASSIMILLO Title: VICE PRESIDENT 3 EXHIBIT 7 - -------------------------------------------------------------------------------- Consolidated Report of Condition of THE BANK OF NEW YORK of One Wall Street, New York, N.Y. 10286 And Foreign and Domestic Subsidiaries, a member of the Federal Reserve System, at the close of business September 30, 2002, published in accordance with a call made by the Federal Reserve Bank of this District pursuant to the provisions of the Federal Reserve Act.
Dollar Amounts In Thousands ASSETS Cash and balances due from depository institutions: Noninterest-bearing balances and currency and coin.. $ 3,735,469 Interest-bearing balances........................... 3,791,026 Securities: Held-to-maturity securities......................... 1,140,688 Available-for-sale securities....................... 15,232,384 Federal funds sold in domestic offices................. 1,286,657 Securities purchased under agreements to resell.............................................. 1,035,718 Loans and lease financing receivables: Loans and leases held for sale...................... 869,285 Loans and leases, net of unearned income............................................ 34,695,130 LESS: Allowance for loan and lease losses...................................... 645,382 Loans and leases, net of unearned income and allowance.............................. 34,049,748 Trading Assets......................................... 9,044,881 Premises and fixed assets (including capitalized leases)............................................. 823,722 Other real estate owned................................ 778 Investments in unconsolidated subsidiaries and associated companies................................ 226,274 Customers' liability to this bank on acceptances outstanding......................................... 249,803 Intangible assets...................................... Goodwill............................................ 1,852,232 Other intangible assets............................. 54,714 Other assets........................................... 4,961,572 ----------- Total assets........................................... $78,354,951 =========== LIABILITIES Deposits: In domestic offices................................. $32,962,289 Noninterest-bearing................................. 12,792,415 Interest-bearing.................................... 20,169,874 In foreign offices, Edge and Agreement subsidiaries, and IBFs............................ 24,148,516 Noninterest-bearing................................. 445,725 Interest-bearing.................................... 23,702,791 Federal funds purchased in domestic offices.............................................. 959,287 Securities sold under agreements to repurchase......... 491,806 Trading liabilities.................................... 2,916,377 Other borrowed money: (includes mortgage indebtedness and obligations under capitalized leases)........................... 1,691,634 Bank's liability on acceptances executed and outstanding......................................... 251,701 Subordinated notes and debentures...................... 2,090,000 Other liabilities...................................... 5,815,688 ----------- Total liabilities...................................... $71,327,298 =========== Minority interest in consolidated subsidiaries........................................ 500,019 EQUITY CAPITAL Perpetual preferred stock and related surplus............................................. 0 Common stock........................................... 1,135,284 Surplus................................................ 1,056,724 Retained earnings...................................... 4,218,003 Accumulated other comprehensive income................. (117,623) Other equity capital components........................ 0 - ------------------------------------------------------------------------------- Total equity capital................................... 6,527,634 ----------- Total liabilities minority interest and equity capital............................................. $78,354,951 ===========
I, Thomas J. Mastro, Senior Vice President and Comptroller of the above-named bank do hereby declare that this Report of Condition is true and correct to the best of my knowledge and belief. Thomas J. Mastro, Senior Vice President and Comptroller We, the undersigned directors, attest to the correctness of this statement of resources and liabilities. We declare that it has been examined by us, and to the best of our knowledge and belief has been prepared in conformance with the instructions and is true and correct. Thomas A. Renyi ] Gerald L. Hassell ] Directors Alan R. Griffith ] - -------------------------------------------------------------------------------- EX-99.1 10 a2101105zex-99_1.htm EX-99.1
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Exhibit 99.1

Aon CORPORATION

LETTER OF TRANSMITTAL

Offer for All Outstanding
7.375% Senior Notes Due 2012
CUSIP No. 037389 AR 4
in Exchange for
7.375% Senior Notes Due 2012
CUSIP No. 037389 AS 2
Which Have Been Registered Under the Securities Act of 1933, as Amended

Pursuant to the Prospectus dated                    , 2003

The Registered Exchange Offer and Withdrawal Period Will Expire at 5:00 p.m., New York City Time, on                    , 2003, Unless Extended (the "Expiration Date")

The Exchange Agent (the "Exchange Agent") for the Exchange Offer is:

The Bank of New York

By Mail, Hand or Overnight Courier: By Facsimile:

The Bank of New York
Corporate Trust Reorganization Unit
101 Barclay 7 East
New York, New York 10286

The Bank of New York
Corporate Trust Reorganization Unit
(212) 298-1915

For Information or Confirmation by Telephone:
(212) 815-3738

        Delivery of this Letter of Transmittal to an address other than as set forth above will not constitute valid delivery.

        This Letter of Transmittal is being furnished by Aon Corporation (the "Company") in connection with its offer to exchange its 7.375% Senior Notes due 2012 (the "Original Notes"), that were issued and sold in a transaction exempt from registration under the Securities Act of 1933, as amended, under that certain Indenture dated as of December 16, 2002 (the "Indenture") between the Company and The Bank of New York, as trustee (the "Trustee"), for a like amount of its newly issued 7.375% Senior Notes due 2012 (the "Exchange Notes") that have been registered under the Securities Act. The Company has prepared and delivered to holders of the Original Notes a prospectus dated                        , 2003 (the "Prospectus"). The Prospectus and this Letter of Transmittal and related materials together constitute the Company's offer (the "Exchange Offer").

        For each Original Note accepted for exchange, the holder will receive an Exchange Note having a principal amount equal to that of the surrendered Original Note. The Exchange Notes will bear interest from the most recent date to which interest has been paid on the Original Notes, or if no interest has been paid, from December 16, 2002. Accordingly, registered holders of Exchange Notes on the relevant record date for the first interest payment date following completion of the exchange offer will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from December 16, 2002. Original notes accepted for exchange will cease to accrue interest from and after the date of completion of the exchange offer. Holders whose Original Notes are accepted for exchange will not receive any payment of interest on the Original Notes otherwise payable on any interest payment date the record date for which occurs after completion of the exchange offer.

        The exchange offer will expire at 5:00 p.m., New York City time, on                        , 2003 (the "Expiration Date') unless extended, in which case the term "Expiration Date" shall mean the last time and date to which the exchange offer is extended.

        This Letter of Transmittal is to be completed by a holder (a) if certificates representing Original Notes are to be physically delivered to the Exchange Agent herewith by the holder, (b) if tender of Original Notes is to be made by book-entry transfer to the Exchange Agent's account at The Depository Trust Company ("DTC") through the DTC Automated Tender Offer Program ("ATOP"), and an Agent's Message (as defined below) is not delivered as provided in the next paragraph, or (c) if tenders are to be made according to the guaranteed delivery procedures set forth in the prospectus under "The Exchange Offer—Guaranteed Delivery Procedures."

        Holders of Original Notes who wish to tender but whose certificates are not immediately available, or who are unable to deliver their certificates (or confirmation of the book-entry transfer of their Original Notes into the Exchange Agent's account at DTC) and all other documents required hereby to the Exchange Agent before the Expiration Date, must tender their Original Notes according to the guaranteed delivery procedures set forth in "The Exchange Offer—Guaranteed Delivery Procedures" in the prospectus. See Instructions 1 and 4. Holders of Original Notes who are tendering by book-entry transfer to the Exchange Agent's account at DTC can execute their tender through ATOP. DTC participants that are accepting the exchange offer must transmit their acceptance to DTC, which will verify the acceptance and execute a book-entry delivery to the Exchange Agent's account at DTC. DTC will then send an Agent's Message (as defined below) to the Exchange Agent for its acceptance. Delivery of the Agent's Message by DTC will satisfy the terms of the exchange offer in lieu of execution and delivery of a Letter of Transmittal by the participant(s) identified in the Agent's Message. Accordingly, this Letter of Transmittal need not be completed by a holder tendering through ATOP. As used herein, the term "Agent's Message" means, with respect to any tendered Original Notes, a message transmitted by DTC to and received by the Exchange Agent and forming part of a book-entry confirmation, stating that DTC has received an express acknowledgment from each tendering participant to the effect that, with respect to those Original Notes, the participant has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against the participant. Delivery of documents to DTC does not constitute delivery to the Exchange Agent.

        PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL CAREFULLY BEFORE COMPLETING ANY BOX BELOW. THE INSTRUCTIONS INCLUDED WITH THIS LETTER OF TRANSMITTAL MUST BE FOLLOWED. QUESTIONS AND REQUESTS FOR ASSISTANCE OR FOR ADDITIONAL COPIES OF THE PROSPECTUS AND LETTER OF TRANSMITTAL SHOULD BE DIRECTED TO THE EXCHANGE AGENT AT (212) 815-3738 OR AT ITS ADDRESS SET FORTH ABOVE.

        Holders who wish to tender their Original Notes must complete Box 1, Box 2 and Box 4 and must sign this Letter of Transmittal in Box 4.

2

BOX 1
TENDER OF ORIGINAL NOTES

o CHECK HERE IF CERTIFICATES REPRESENTING THE TENDERED ORIGINAL NOTES ARE ENCLOSED WITH THIS LETTER OF TRANSMITTAL.

o

CHECK HERE IF TENDERED ORIGINAL NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:

Name of Tendering Institution:



Account Number:



Transaction Code Number:



o

CHECK HERE IF TENDERED ORIGINAL NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY SENT TO THE EXCHANGE AGENT PRIOR TO THE DATE HEREOF AND COMPLETE THE FOLLOWING:

Name(s) of Registered Owner(s):



Date of Execution of Notice of Guaranteed Delivery:



Name of Eligible Institution which Guaranteed Delivery:



IF DELIVERED BY BOOK-ENTRY TRANSFER, COMPLETE THE FOLLOWING:

Account Number:



Transaction Code Number:



        List below the Original Notes being tendered herewith. If the space provided is inadequate, list the certificate numbers and principal amounts on a separately executed schedule and affix the schedule to this Letter of Transmittal. Tenders of Original Notes will be accepted only in principal amounts equal to $1,000 or integral multiples thereof. No alternative, conditional or contingent tenders will be accepted.

3

BOX 2
DESCRIPTION OF ORIGINAL NOTES TENDERED

Name(s) and address(es) of registered holder(s),
exactly as name(s) appear(s) on Original Notes,
or on a security position
Certificate
number(s) of
Original Notes*
Aggregate
principal amount
represented by
certificate(s)
Aggregate
principal amount
tendered**















*
DOES NOT need to be completed if Original Notes are tendered by book-entry transfer.

**
Unless otherwise indicated, the holder will be deemed to have tendered the entire face amount of all Original Notes represented by tendered certificates. See Instruction 4.

        If not already printed above, the name(s) and address(es) of the registered holder(s) should be printed exactly as they appear on the certificate(s) representing the Original Notes tendered hereby or, if tendered by a participant in DTC, exactly as such participant's name appears on a security position listing as the owner of those Original Notes.

4

BOX 3
SPECIAL ISSUANCE/DELIVERY INSTRUCTIONS
(SEE INSTRUCTIONS 1 AND 2)

        Complete the information in the blanks below this paragraph ONLY if (1) either (a) the Exchange Notes issued in exchange for Original Notes tendered hereby, or (b) Original Notes in a principal amount not tendered or not accepted for exchange, are to be issued or reissued in the name of someone other than the person(s) whose signature(s) appear(s) within this Letter of Transmittal or sent to an address different from that shown in Box 2 entitled "Description of Original Notes Tendered" within this Letter of Transmittal, or if (2) either (a) the Exchange Notes that are delivered by book-entry transfer or (b) the Original Notes delivered by book-entry transfer which are not accepted for exchange, are to be returned by credit to an account maintained by DTC other than the account indicated in Box 1 above entitled "Tender of Original Notes."

Issue Exchange Notes or return unexchanged Original Notes to:

Name:

Address:



(Include Zip Code)


(Tax Identification or Social Security Number)

o

Credit Exchange Notes or unexchanged Original Notes delivered by book-entry transfer to the DTC account set forth below:







        Complete the following only if certificates for Exchange Notes or for unexchanged Original Notes are to be sent to someone other that the person named above or to that person at an address other than that shown in Box 2 entitled "Description of Original Notes Tendered."

Name:

Address:



(Include Zip Code)


(Tax Identification or Social Security Number)

(See Substitute Form W-9 herein)

5

NOTE: SIGNATURES MUST BE PROVIDED BELOW.
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.

Ladies and Gentlemen:

        The undersigned is a holder of 7.375% Senior Notes due 2012 (the "Original Notes") issued by Aon Corporation (the "Company") under that certain Indenture dated as of December 16, 2002 (the "Indenture") between the Company and The Bank of New York, as trustee (the "Trustee").

        The undersigned acknowledges receipt of the prospectus dated                        , 2003 (the "Prospectus") and this Letter of Transmittal, which together constitute the Company's offer (the "Exchange Offer") to exchange an aggregate principal amount of up to $225 million of its newly issued 7.375% Senior Notes due 2012 (the "Exchange Notes") that have been registered under the Securities Act of 1933, as amended (the "Securities Act"), for a like amount of its Original Notes that were issued and sold in a transaction exempt from registration under the Securities Act.

        The undersigned hereby tenders to the Company, upon the terms and subject to the conditions set forth in the Prospectus, and in accordance with this Letter of Transmittal, the principal amount of Original Notes indicated in Box 2 above entitled "Description of Original Notes Tendered" under the column heading "Principal Amount Tendered" (or, if nothing is indicated therein, with respect to the entire aggregate principal amount represented by the Original Notes described in that table). The undersigned acknowledges and agrees that Original Notes may not be tendered except in accordance with the procedures set forth in the Prospectus and this Letter of Transmittal.

        Subject to, and effective upon, the acceptance for exchange of the Original Notes tendered herewith in accordance with the terms and subject to the conditions of the Exchange Offer, the undersigned hereby exchanges, assigns and transfers to, or upon the order of, the Company, all right, title, and interest in and to all of the Original Notes that are being tendered hereby and that are being accepted for exchange pursuant to the Exchange Offer. By executing this Letter of Transmittal, and subject to and effective upon acceptance for exchange of the Original Notes tendered therewith, the undersigned hereby irrevocably constitutes and appoints the Exchange Agent the true and lawful agent and attorney-in-fact of the undersigned (with full knowledge that the Exchange Agent also acts as the agent of the Company) with respect to such Original Notes, with full powers of substitution and revocation (such powers of attorney being deemed to be an irrevocable power coupled with an interest), to (i) present such Original Notes and all evidences of transfer and authenticity to, or transfer ownership of such Original Notes on the account books maintained by DTC to, or upon the order of, the Company, (ii) present such Original Notes for transfer of ownership on the books of the Company, and (iii) receive all benefits and otherwise exercise all rights of beneficial ownership of such Original Notes, all in accordance with the terms and conditions of the Exchange Offer.

        If the undersigned is not the registered holder of the Original Notes listed in Box 2 above labeled "Description of Original Notes Tendered" under the column heading "Principal Amount Tendered" or such registered holder's legal representative or attorney-in-fact, then in order to validly consent, the undersigned has obtained a properly completed irrevocable proxy that authorizes the undersigned (or the undersigned's legal representative or attorney-in-fact) to deliver a Letter of Transmittal in respect of such Original Notes on behalf of the registered holder thereof, and that proxy is being delivered with this Letter of Transmittal. The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, exchange, assign and transfer the Original Notes tendered hereby, and that when those Original Notes are accepted for exchange by the Company, the Company will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances, and those Original Notes will not be subject to any adverse claims. The undersigned will, upon request, execute and deliver any additional documents deemed by the Exchange Agent or the Company to be necessary or desirable to complete the exchange, assignment and transfer of the Original Notes tendered hereby.

6

        The undersigned acknowledges and agrees that a tender of Original Notes pursuant to any of the procedures described in the Prospectus and in this Letter of Transmittal and an acceptance of such Original Notes by the Company will constitute a binding agreement between the undersigned and the Company upon the terms and subject to the conditions of the Exchange Offer.

        The undersigned understands that the Exchange Offer will expire at 5:00 p.m., New York City time, on            , 2003, unless extended by the Company in its sole discretion or earlier terminated (the "Expiration Date").

        No authority conferred or agreed to be conferred by this Letter of Transmittal shall be affected by, and all such authority shall survive, the death or incapacity of the undersigned, and any obligation of the undersigned hereunder shall be binding upon the heirs, executors, administrators, trustees in bankruptcy, personal and legal representatives, successors and assigns of the undersigned. This tender of Original Notes may be withdrawn at any time prior to the Expiration Date. See "The Exchange Offer—Withdrawal of Tenders" in the Prospectus.

        The undersigned hereby represents and warrants that: (i) the undersigned is acquiring the Exchange Notes in the ordinary course of its business; (ii) the undersigned is not engaged in, and does not intend to engage in, a distribution of the Exchange Notes; (iii) the undersigned has no arrangement or understanding with any person to participate in the distribution of the Exchange Notes; and (iv) neither the undersigned nor any other such person is an affiliate of the Company. If the undersigned is a broker-dealer, it acknowledges that it will deliver a copy of the Prospectus in connection with any resale of the Exchange Notes; however, by so acknowledging and by delivering a Prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

        The undersigned also acknowledges that this Exchange Offer is being made in reliance upon interpretations by the staff of the SEC, as set forth in no-action letters issued to third parties, that the Exchange Notes issued in exchange for Original Notes pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof (other than any holder that is an "affiliate" of the Company within the meaning of Rule 405 under the Securities Act), without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that such Exchange Notes are acquired in the ordinary course of such holders' business and the holders have no arrangement with any person to participate in the distribution of the Exchange Notes. However, the Company has not obtained a no-action letter specifically for this Exchange Offer, and there can be no assurance that the staff of the SEC would make a similar determination with respect to the Exchange Offer as in other circumstances. If any holder is an affiliate of the Company, or is engaged in or intends to engage in or has any arrangement or understanding with respect to the distribution of the Exchange Notes to be acquired pursuant to the Exchange Offer, that holder (a) cannot rely on the applicable interpretations of the staff of the SEC and (b) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any resale transaction.

        Original notes properly tendered and not withdrawn will be accepted as soon as practicable after the satisfaction or waiver of all conditions to the Exchange Offer. The undersigned understands that the Company will deliver the Exchange Notes as promptly as practicable following acceptance of the tendered Original Notes. The Exchange Offer is subject to a number of conditions, as more particularly set forth in the Prospectus. See "The Exchange Offer—Conditions of the Exchange Offer" in the Prospectus. The undersigned recognizes that as a result of these conditions the Company may not be required to accept any of the Original Notes tendered hereby. In that event, the Original Notes not accepted for exchange will be returned to the undersigned at the address shown in Box 2, "Description of Original Notes Tendered," unless otherwise indicated in Box 3, "Special Issuance/Delivery Instructions."

7

        Unless otherwise indicated in Box 3, "Special Issuance/Delivery Instructions," the undersigned hereby request(s) that any Original Notes representing principal amounts not tendered or not accepted for exchange, and that the Exchange Notes with respect to Original Notes accepted for exchange, be issued in the name(s) of, and delivered to, the undersigned (and in the case of Original Notes tendered by book-entry transfer, by credit to the account of DTC indicated therein).

        In the event that Box 3, "Special Issuance/Delivery Instructions," is completed, the undersigned hereby request(s) that any Original Notes representing principal amounts not tendered or not accepted for exchange, and that the Exchange Notes with respect to Original Notes accepted for exchange, be issued in the name(s) of, and be delivered to, the person(s) at the address(es) therein indicated, or in the case of a book-entry delivery of Original Notes, please credit the account indicated therein maintained at DTC. The undersigned recognizes that the Company has no obligation pursuant to the "Special Issuance/Delivery Instructions" box to transfer any Original Notes from the names of the registered holder(s) thereof or to issue any Exchange Notes in the name(s) of anyone other than the name(s) of the Original Notes in respect of which those Exchange Notes are issued, if the Company does not accept for exchange any of the principal amount of such Original Notes so tendered. The undersigned recognizes that the undersigned must comply with all of the terms and conditions of the Indenture as amended or supplemented from time to time in accordance with its terms to transfer Original Notes either not tendered for exchange or not accepted for exchange from the name of the registered holder(s).

        For purposes of the Exchange Offer, the undersigned understands that the Company will be deemed to have accepted for exchange validly tendered Original Notes (or defectively tendered Original Notes with respect to which the Company has waived the defect) if, as and when the Company gives oral (confirmed in writing) or written notice thereof to the Exchange Agent.

        The undersigned understands that the delivery and surrender of the Original Notes is not effective, and the risk of loss of the Original Notes does not pass to the Company, until receipt by the Exchange Agent of this Letter of Transmittal, or a facsimile hereof, properly completed and duly executed (or, in the case of a book-entry transfer, an Agent's Message, if applicable, in lieu of the Letter of Transmittal), together with all accompanying evidences of authority and any other required documents in a form satisfactory to the Company. All questions as to the form of all documents and the validity (including time of receipt) and acceptance of tenders and withdrawals of Original Notes will be determined by the Company in its sole discretion, which determination shall be final and binding. The undersigned has completed the appropriate boxes and signed this Letter of Transmittal to indicate the action the undersigned desires to take with respect to the Exchange Offer.

o
CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

Name:

Address:


(Include Zip Code)

        If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of Exchange Notes. If the undersigned is a broker-dealer that will receive Exchange Notes for its own account in exchange for securities that were acquired as a result of market-making activities or other trading activities, it acknowledges that it will deliver a prospectus in connection with any resale of such Exchange Notes; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

8

BOX 4
PLEASE SIGN HERE
(To be completed by all tendering
holders of Original Notes regardless of whether Original Notes
are being physically delivered herewith)

        By completing, executing and delivering this Letter of Transmittal, the undersigned hereby tenders the principal amount of the Original Notes listed in Box 2 above labeled "Description of Original Notes Tendered" under the column heading "Principal Amount Tendered" (or if nothing is indicated therein, with respect to the entire aggregate principal amount represented by the Original Notes described in that box).

This Letter of Transmittal must be signed by the registered holder(s) exactly as the name(s) appear(s) on the certificate(s) representing Original Notes or, if tendered by a participant in DTC, exactly as such participant's name appears on a security position listing as the owner of those Original Notes. If signature is by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, please set forth the full title and see Instruction 2.




SIGNATURE OF REGISTERED HOLDER(S) OR AUTHORIZED SIGNATORY
(SEE GUARANTEE REQUIREMENT BELOW)

Dated



Name(s)


(Please Print)

Capacity (full title)



Area Code and Telephone No.



Tax Identification or Social Security No.



MEDALLION SIGNATURE GUARANTEE
(IF REQUIRED—SEE INSTRUCTIONS 1 AND 2)

Authorized Signature:



Name of Firm:



(Place Seal Here)

COMPLETE ACCOMPANYING SUBSTITUTE FORM W-9

9

INSTRUCTIONS
FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER

        1.    Signature Guarantees.    Signatures on this Letter of Transmittal must be guaranteed by a recognized participant in the Securities Exchange Agents Medallion Program or the Stock Exchange Medallion Program (a "Medallion Signature Guarantor") (generally, a member of a registered national securities exchange or the National Association of Securities Dealers, Inc., or a commercial bank or trust company having an office in the United States (each, an "Eligible Institution")), unless (a) the Original Notes tendered hereby are tendered by a registered holder (or by a participant in DTC whose name appears on a security position listing as the owner of the Original Notes) that has not completed Box 3 entitled "Special Issuance/Delivery Instructions" in this Letter of Transmittal, or (b) the Original Notes are tendered for the account of an eligible institution. If the Original Notes are registered in the name of a person other than the signer of this Letter of Transmittal, if Original Notes not accepted for exchange or not tendered are to be returned to a person other than the registered holder or if Exchange Notes are to be issued to someone other than the signatory of this Letter of Transmittal, then the signatures on this Letter of Transmittal accompanying the tendered Original Notes must be guaranteed by a Medallion Signature Guarantor as described above. See Instruction 2.

        2.    Signatures on Letter of Transmittal, Instruments of Transfer and Endorsements.    If the registered holders of the Original Notes tendered hereby sign this Letter of Transmittal, the signatures must correspond with the name(s) as written on the face of the certificate(s) without alteration, enlargement or any change whatsoever. If this Letter of Transmittal is signed by a participant in DTC whose name is shown on a security position listing as the owner of the Original Notes tendered hereby, the signature must correspond with the name shown on the security position listing as the owner of the Original Notes.

        If any of the Original Notes tendered hereby are registered in the name of two or more holders, all registered holders must sign this Letter of Transmittal. If any of the Original Notes tendered hereby are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate Letters of Transmittal as there are different registrations of certificates.

        If this Letter of Transmittal or any Original Note or instrument of transfer is signed by a trustee, executor, administrator, guardian, attorney-in-fact, agent, officer of a corporation or other person acting in a fiduciary or representative capacity, such person should so indicate when signing, and proper evidence satisfactory to the Company of such person's authority to so act must be submitted.

        When this Letter of Transmittal is signed by the registered holders of the Original Notes tendered hereby, no endorsements of the Original Notes or separate instruments of transfer are required unless payment is to be made, or Original Notes not tendered or exchanged are to be issued to a person other than the registered holders, in which case signatures on the Original Notes or instruments of transfer must be guaranteed by a Medallion Signature Guarantor.

        This Letter of Transmittal and Original Notes should be sent only to the Exchange Agent, and not to the Company or DTC.

        If this Letter of Transmittal is signed other than by the registered holder(s) of the Original Notes tendered hereby, such Original Notes must be endorsed or accompanied by appropriate instruments of transfer, and a duly completed proxy entitling the signer to tender those Original Notes on behalf of the registered holders, in any case signed exactly as the name or names of the registered holders appear on the Original Notes and signatures on those Original Notes or instruments of transfer and proxy are required and must be guaranteed by a Medallion Signature Guarantor, unless the signature is that of an eligible institution.

10

        3.    Transfer Taxes.    Except as set forth in this Instruction 3, the Company will pay or cause to be paid any transfer taxes with respect to the transfer of Original Notes to it, or to its order, pursuant to the Exchange Offer. If Exchange Notes are to be issued or delivered to, or if Original Notes not tendered or exchanged are to be registered in the name of, any persons other than the registered owners, or if tendered Original Notes are registered in the name of any persons other than the persons signing this Letter of Transmittal, the amount of transfer taxes (whether imposed on the registered holder or such other person) payable on account of the transfer to such other person will be billed to the holder unless satisfactory evidence of the payment of such taxes or exemption therefrom is submitted.

        4.    Delivery of this Letter of Transmittal and Certificates; Guaranteed Delivery Procedures.    This Letter of Transmittal is to be used if (a) certificates for Original Notes are to be physically delivered to the Exchange Agent herewith, (b) tenders are to be made according to the guaranteed delivery procedures or (c) tenders are to be made pursuant to the procedures for delivery by book-entry transfer, all as set forth in the Prospectus. For holders whose Original Notes are being delivered by book-entry transfer, delivery of an Agent's Message by DTC will satisfy the terms of the Exchange Offer in lieu of execution and delivery of a Letter of Transmittal by the participant(s) identified in the Agent's Message.

        To validly tender Original Notes pursuant to the Exchange Offer, either (a) the Exchange Agent must receive a properly completed and duly executed copy of this Letter of Transmittal (or facsimile hereof) with any required signature guarantees, together with either a properly completed and duly executed Notice of Guaranteed Delivery or certificates for the Original Notes, or an Agent's Message, as the case may be, and any other documents required by this Letter of Transmittal, or (b) a holder of Original Notes must comply with the guaranteed delivery procedures set forth below.

        Holders of Original Notes who desire to tender them pursuant to the Exchange Offer and whose certificates representing the Original Notes are not lost but are not immediately available, or time will not permit all required documents to reach the Exchange Agent prior to 5:00 p.m., New York City time, on the Expiration Date, or who cannot complete the procedure for book-entry transfer on a timely basis, may tender their Original Notes pursuant to the guaranteed delivery procedures set forth in the Prospectus under "The Exchange Offer—Guaranteed Delivery Procedures." Pursuant to those procedures, (a) tender must be made by a firm that is a member of a registered national securities exchange or of the National Association of Securities Dealers, Inc. or by a commercial bank or trust company having an office or correspondent in the United States and, in each instance, that is a participant in the Securities Transfer Agent Medallion Program ("STAMP") or similar program (an "eligible institution"), (b) the Exchange Agent must have received from the eligible institution, prior to 5:00 p.m., New York City time, on the Expiration Date, a properly completed and duly executed Notice of Guaranteed Delivery (by mail, hand delivery, telegram, facsimile transmission or otherwise), and (c) the certificates for all physically delivered Original Notes in proper form for transfer or an Agent's Message as the case may be, together with a properly completed and duly executed Letter of Transmittal (or facsimile hereof) and all other documents required by this Letter of Transmittal, must be received by the Exchange Agent within three New York Stock Exchange trading days after the Expiration Date, all as provided in the Prospectus under the caption "The Exchange Offer—Guaranteed Delivery Procedures."

        THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, THE CERTIFICATES FOR ORIGINAL NOTES AND OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE TENDERING HOLDER. EXCEPT AS OTHERWISE PROVIDED HEREIN AND IN THE PROSPECTUS, DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE EXCHANGE AGENT. IF DELIVERY IS BY MAIL, WE RECOMMEND THAT THE HOLDER USE PROPERLY INSURED, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, AND THAT THE MAILING BE MADE

11

SUFFICIENTLY IN ADVANCE OF THE EXPIRATION DATE TO PERMIT DELIVERY TO THE EXCHANGE AGENT PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.

        All questions as to the validity, form, eligibility (including time of receipt), acceptance, withdrawal and revocation of Original Notes tendered for exchange will be determined by the Company in its sole discretion, whose determination will be final and binding. The Company reserves the right to waive any defects or irregularities in the tender or conditions of the Exchange Offer as to any particular Original Notes. The interpretation of the Company of the terms and conditions of the Exchange Offer (including these Instructions) will be final and binding. Unless waived, any defects or irregularities in connection with tenders must be cured within the time determined by the Company. No alternative, conditional or contingent tenders will be accepted. Neither the Company, the Exchange Agent or any other person will be under any duty to give notice of any defects or irregularities in any tender or will incur any liability for failure to give any notice. Tenders of Original Notes will not be deemed to have been made until irregularities have been cured or waived. Any certificates constituting Original Notes received by the Exchange Agent that are not properly tendered or as to which irregularities have not been cured or waived will be returned by the Exchange Agent to the tendering holders, unless otherwise provided in this Letter of Transmittal, as soon as practicable following the Expiration Date.

        5.    Withdrawal Rights.    Original notes tendered pursuant to the Exchange Offer may be withdrawn, as provided below, at any time prior to 5:00 p.m., New York City time, on the Expiration Date. For the withdrawal of a tender to be effective, a written, telegraphic or facsimile transmitted notice of withdrawal must be received by the Exchange Agent at the address or number set forth above prior to the Expiration Date. Any notice of withdrawal must (a) specify the name of the person who tendered the Original Notes, (b) identify the Original Notes to be withdrawn (including the certificate number or numbers of any physically delivered Original Notes and the principal amount of the Original Notes), and (c) be signed in the same manner required by the Letter of Transmittal by which the Original Notes were tendered (including any required signature guarantees, endorsements and/or powers). All questions as to the validity, form and eligibility (including time of receipt) of notices of withdrawal will be determined by the Company, whose determination will be final and binding on all parties. The Original Notes so withdrawn, if any, will be deemed not to have been validly tendered for exchange for purposes of the Exchange Offer. Any Original Notes which have been tendered for exchange but which are withdrawn will be returned to the holder without cost to the holder as soon as practicable after withdrawal. Properly withdrawn Original Notes may be retendered on or prior to 5:00 p.m., New York City time, on the Expiration Date by following the procedures for tender described in this Letter of Transmittal.

        Neither the Company, the Exchange Agent nor any other person will be under any duty to give notice of any defects or irregularities in any notice of withdrawal or will incur any liability for failure to give such a notice.

        6.    Substitute Form W-9.    Each tendering holder (or other recipient of any Exchange Notes) is required to provide the Exchange Agent with a correct taxpayer identification number ("TIN"), generally the holder's Social Security or Federal Employer Identification Number, and with certain other information, on Substitute Form W-9, which is provided under "Important Tax Information" below, and to certify that the holder (or other person) is not subject to backup withholding. Failure to provide the information on the Substitute Form W-9 may subject the tendering holder (or other person) to a $50 penalty imposed by the Internal Revenue Service and 30% federal income tax backup withholding on any payment. The box in Part 3 of the Substitute Form W-9 may be checked if the tendering holder (or other person) has not been issued a TIN and has applied for a TIN or intends to apply for a TIN in the near future. If the box in Part 3 is checked and the Exchange Agent is not provided with a TIN by the time of payment, the Exchange Agent will withhold 30% on all reportable payments, if any, until a TIN is provided to the Exchange Agent.

12

        7.    Requests for Assistance or Additional Copies.    Any questions or requests for assistance or additional copies of the Prospectus or this Letter of Transmittal may be directed to the Exchange Agent at its telephone number set forth below.

IMPORTANT TAX INFORMATION

        Under federal income tax law, a holder whose tendered Original Notes are accepted for payment is required to provide the Exchange Agent with the holder's current TIN on Substitute Form W-9 below, or, alternatively, to establish another basis for an exemption from backup withholding. If the holder is an individual, the TIN is his or her Social Security number. If the Exchange Agent is not provided with the correct TIN, the holder may be subject to a $50 penalty imposed by the Internal Revenue Service. In addition, any payment made to the holder or other payee with respect to Original Notes exchanged pursuant to the Exchange Offer or to Exchange Notes may be subject to a 30% back-up withholding tax.

        Certain holders (including, among others, all corporations and certain foreign individuals) are not subject to these backup withholding and reporting requirements. In order for a foreign individual to qualify as an exempt recipient, that holder must submit to the Exchange Agent a properly completed Internal Revenue Service Form W-8BEN or other appropriate Form W-8 (a "Form W-8"), signed under penalties of perjury, attesting to that individual's exempt status. A Form W-8 can be obtained from the Exchange Agent. See the enclosed "Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9" for additional instructions.

        If backup withholding applies, the Exchange Agent is required to withhold 30% of any payment made to the holder or other payee. Backup withholding is not an additional tax. Rather, the federal income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may be obtained from the Internal Revenue Service.

Purpose of Substitute Form W-9

        To prevent backup withholding on any payment made to a holder or other payee with respect to Original Notes exchanged pursuant to the Exchange Offer or to Exchange Notes, the holder is required to notify the Exchange Agent of the holder's current TIN (or the TIN of any other payee) by completing the form below, certifying that the TIN provided on Substitute Form W-9 is correct (or that the holder is awaiting a TIN), and that (i) the holder has not been notified by the Internal Revenue Service that the holder is subject to backup withholding as a result of failure to report all interest or dividends or (ii) the Internal Revenue Service has notified the holder that the holder is no longer subject to backup withholding.

What Number to Give the Exchange Agent

        The holder is required to give the Exchange Agent the TIN (e.g. Social Security number or Federal Employer Identification Number) of the registered owner of the Original Notes. If the Original Notes are registered in more than one name or are not registered in the name of the actual owner, consult the enclosed "Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9" for additional guidance on which number to report.

13

PAYER'S NAME: Aon CORPORATION

SUBSTITUTE FORM W-9

DEPARTMENT OF THE TREASURY
INTERNAL REVENUE SERVICE

PAYER'S REQUEST FOR TAXPAYER IDENTIFICATION NUMBER ("TIN")
AND CERTIFICATIONS

PART 1—PLEASE PROVIDE YOUR TIN IN THE BOX AT RIGHT AND CERTIFY BY SIGNING AND DATING BELOW

Social Security Number(s)
OR
Federal Employer Identification Number(s)

PART 2—CERTIFICATION—Under penalties of perjury, I certify that:

(1)
The number shown on this form is my correct taxpayer identification number (or I am waiting for a number to be issued for me);

(2)
I am not subject to backup withholding because: (a) I am exempt from backup withholding, or (b) I have not been notified by the Internal Revenue Service (IRS) that I am subject to backup withholding as a result of a failure to report all interest or dividends, or (c) the IRS has notified me that I am no longer subject to backup withholding;

(3)
I am a U.S. person (including a U.S. resident alien).

PART 3—AWAITING TIN—o

CERTIFICATION INSTRUCTIONS—You must cross out item (2) above if you have been notified by the IRS that you are currently subject to backup withholding because of underreporting interest or dividends on your tax return.

Name

Address

(include zip code)

Signature

Date

NOTE:

FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN A $50 PENALTY IMPOSED BY THE INTERNAL REVENUE SERVICE AND BACKUP WITHHOLDING OF 30% OF ANY PAYMENTS MADE TO YOU PURSUANT TO AN OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

NOTE:

YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF THE SUBSTITUTE FORM W-9.

14

CERTIFICATION OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (1) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration office or (2) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number by the time of payment, 30% of all reportable payments payable to me thereafter will be withheld until I provide a taxpayer identification number to the payer and that, if I do not provide my taxpayer identification number within sixty days, such retained amounts shall be remitted to the IRS as backup withholding.

Signature
Date

In order to tender, a holder should send or deliver a properly completed and signed Letter of Transmittal, certificates for the Original Notes and any other required documents to the Exchange Agent at the address set forth below or tender pursuant to DTC's Automated Tender Offer Program. The Exchange Agent for the Exchange Offer is:

The Bank of New York

By Mail, Hand or Overnight Courier: By Facsimile:

The Bank of New York
Corporate Trust Reorganization Unit
101 Barclay Street 7 East
New York, New York 10286

The Bank of New York
Corporate Trust Reorganization Unit
(212) 298-1915

For Information or Confirmation by Telephone:
(212) 815-3738

15

GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER
ON SUBSTITUTE FORM W-9

Guidelines for Determining the Proper Identification Number to Give the Payer.

        Social Security numbers have nine digits separated by two hyphens: i.e. 000-00-0000. Employer identification number have nine digits separated by only one hyphen: i.e. 00-0000000. The table below will help determine the number to give the payer.

For this type of account number
Give the SOCIAL SECURITY number of

1. Individual The individual

2.

Two or more individuals (joint account)

The actual owner of the account or, if combined funds, the first individual on the account(1)

3.

Custodian account of a minor (Uniform Gift to Minors Act)

The minor(2)

4.

a.

The usual revocable savings trust account (grantor is also trustee)

The grantor-trustee(1)

b.

So-called trust account that is not a legal or valid trust under state law

The actual owner(1)

For this type of account number

Give the EMPLOYER IDENTIFICATION number of

5. Sole proprietorship account The owner(3)

6.

A valid trust, estate or pension trust

Legal entity (Do not furnish the identifying number of the personal representative or trustee unless the legal entity itself is not designated in the account title)(4)

7.

Corporate

The corporation

8.

Association, club, religious, charitable, educational or other tax-exempt organization

The organization

9.

Partnership

The partnership

10.

A broker or registered nominee

The broker or nominee

11.

Account with the Department of Agriculture in the name of a public entity (such as a State or local government, school district or person) that receives agricultural program payments

The public entity

(1)
List first and circle the name of the person whose number you furnish.

(2)
Circle the minor's name and furnish the minor's social security number.

(3)
You must show your individual name, but you may also enter your business or "doing business as" name. You may use either your SSN or EIN.

(4)
List first and circle the name of the legal trust, estate, or pension trust.

Note: If no name is circled when there is more than one name, the number will be considered to be that of the first name issued.

16

        Section references are to the Internal Revenue Code.

        Purpose of Form.—A person who is required to file an information return with the IRS must get your correct TIN to report income paid to you, real estate transactions, mortgage interest you paid, the acquisition or abandonment of secured property, cancellation of debt, or contributions you made to an IRA. Use Form W-9 to give your correct TIN to the requester (the person requesting your TIN) and, when applicable, (1) to certify the TIN you are giving is correct (or you are waiting for a number to be issued), (2) to certify you are not subject to backup withholding, or (3) to claim exemption from backup withholding if you are an exempt payee. Giving your correct TIN and making the appropriate certifications will prevent certain payments from being subject to backup withholding.

        What is Backup Withholding?—Persons making certain payments to you must withhold and pay to the IRS 30% of such payments under certain conditions. This is called "backup withholding." Payments that could be subject to backup withholding include interest, dividends, broker and barter exchange transactions, rents, royalties, nonemployee pay, and certain payments from fishing boat operators. Real estate transactions are not subject to backup withholding.

        If you give the requester your correct TIN, make the proper certifications, and report all your taxable interest and dividends on your tax return, your payments will not be subject to backup withholding. Payments you receive will be subject to backup withholding if:

1.
You do not furnish your TIN to the requester; or

2.
The IRS tells the requester that you furnished an incorrect TIN; or

3.
The IRS tells you that you are subject to backup withholding because you did not report all your interest and dividends on your tax return (for reportable interest and dividends only); or

4.
You do not certify to the requester that you are not subject to backup withholding under 3 above (for reportable interest and dividend accounts opened after 1983 only); or

5.
You do not certify your TIN. See the Part III Instructions for exceptions.

        Certain payees and payments are exempt from backup withholding and information reporting. See the Part II Instructions and the separate Instructions for the Requester of Form W-9.

        How to Get a TIN.—If you do not have a TIN, apply for one immediately. To apply, get Form SS-5, Application for a Social Security Number Card (for individuals), from your local office of the Social Security Administration, or Form SS-4, Application for Employer Identification Number (for businesses and all other entities), from your local IRS office.

        If you do not have a TIN, write "Applied For" in the space for the TIN in Part I, sign and date the form, and give it to the requester. Generally, you will then have 60 days to get a TIN and give it to the requester. If the requester does not receive your TIN within 60 days, backup withholding, if applicable, will begin and continue until you furnish your TIN.

Note: Writing "Applied For" on the form means that you have already applied for a TIN OR that you intend to apply for one soon.

        As soon as you receive your TIN, complete another Form W-9, include your TIN, sign and date the form, and give it to the requester.

Penalties

        Failure To Furnish TIN.—If you fail to furnish your correct TIN to a requester, you are subject to a penalty of $50 for each such failure unless your failure is due to reasonable cause and not to willful neglect.

17

        Civil Penalty for False Information With Respect to Withholding.—If you make a false statement with no reasonable basis that results in no backup withholding, you are subject to a $500 penalty.

        Criminal Penalty for Falsifying Information.—Willfully falsifying certifications or affirmations may subject you to criminal penalties including fines and/or imprisonment.

        Misuse of TINs.—If the requester discloses or uses TINs in violation of Federal law, the requester may be subject to civil and criminal penalties.

Specific Instructions

        Name.—If you are an individual, you must generally enter the name shown on your social security card. However, if you have changed your last name, for instance, due to marriage, without informing the Social Security Administration of the name change, please enter your name, the last name shown on your social security card and your new last name.

        Sole Proprietor.—You must enter your individual name. (Enter either your SSN or EIN in Part I). You may also enter your business name or "doing business as" name on the business name line. Enter your name as shown on your social security card and business name as it was used to apply for your EIN on Form SS-4.

Part I—Taxpayer Identification Number (TIN)

        You must enter your TIN in the appropriate box. If you are a sole proprietor, you may enter your SSN or EIN. Also see the chart on page 16 for further clarification of name and TIN combinations. If you do not have a TIN, follow the instructions under How To Get A TIN on page 17.

Part II—For Payees Exempt From Backup Withholding

        Individuals (including sole proprietors) are not exempt from backup withholding. Corporations are exempt from backup withholding for certain payments, such as interest and dividends.

        If you are exempt from backup withholding, you should still complete this form to avoid possible erroneous backup withholding. Enter your correct TIN in Part I, write "Exempt" in Part II, and sign and date the form. If you are a nonresident alien or a foreign entity not subject to backup withholding, give the requester the appropriate completed Form W-8, Certificate of Foreign Status.

Part III—Certification

        For a joint account, only the person whose TIN is shown in Part I should sign.

        1.    Interest, Dividend, and Barter Exchange Accounts Opened Before 1984 and Broker Accounts Considered Active During 1983. You must give your correct TIN, but you do not have to sign the certification.

        2.    Interest, Dividend, Broker, and Barter Exchange Accounts Opened After 1983 and Broker Accounts Considered Inactive During 1983. You must sign the certification or backup withholding will apply. If you are subject to backup withholding and you are merely providing your correct TIN to the requester, you must cross out Item 2 in the certification before signing the form.

        3.    Real Estate Transactions. You must sign the certification. You may cross out Item 2 of the certification.

        4.    Other Payments. You must give your correct TIN, but you do not have to sign the certification unless you have been notified of an incorrect TIN. Other payments include payments made in the course of the requester's trade or business for rents, royalties, goods (other than bills for merchandise),

18

medical and health care services, payments to a nonemployee for services (including attorney and accounting fees), and payments to certain fishing boat crew members.

        5.    Mortgage Interest Paid by You, Acquisitions or Abandonment of Secured Property, Cancellation of Debt, or IRA Contributions. You must give your correct TIN, but you do not have to sign the certification.

Privacy Act Notice

        Section 6109 requires you to give your correct TIN to persons who must file information returns with the IRS to report interest, dividends, and certain other income paid to you, mortgage interest you paid, the acquisition or abandonment of secured property, cancellation of debt, or contributions you made to an IRA. The IRS uses the numbers for identification purposes and to help verify the accuracy of your tax return. You must provide your TIN whether or not you are required to file a tax return. Payers must generally withhold 30% of taxable interest, dividend, and certain other payments to a payee who does not give a TIN to a payer. Certain penalties may also apply.

19

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Exhibit 99.1

EX-99.2 11 a2101105zex-99_2.htm EX-99.2
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Exhibit 99.2

NOTICE OF GUARANTEED DELIVERY
for Tender of
7.375% Senior Notes due 2012
of Aon Corporation

        As set forth in the Exchange Offer (as defined below), this Notice of Guaranteed Delivery (or a facsimile hereof) or one substantially equivalent hereto or the electronic form used by The Depository Trust Company ("DTC") for this purpose must be used to accept the Exchange Offer if certificates for 7.375% Senior Notes due 2012 (the "Original Notes") of Aon Corporation, a Delaware corporation (the "Company"), are not immediately available to the registered holder of such Original Notes, or if a participant in DTC is unable to complete the procedures for book-entry transfer on a timely basis of Original Notes to the account maintained by The Bank of New York (the "Exchange Agent") at DTC, or if time will not permit all documents required by the Exchange Offer to reach the Exchange Agent prior to 5:00 p.m., New York City time, on                         , 2003, unless extended (the "Expiration Date"). This Notice of Guaranteed Delivery (or a facsimile hereof) or one substantially equivalent hereto may be delivered by mail (registered or certified mail is recommended), by facsimile transmission, by hand or overnight carrier to the Exchange Agent. See "The Exchange Offer—Procedures for Tendering Original Notes." Capitalized terms used herein and not defined herein have the meanings assigned to them in the Exchange Offer.

The Exchange Agent (the "Exchange Agent") for the Exchange Offer is:

The Bank of New York

By Mail, Hand or Overnight Courier: By Facsimile:

The Bank of New York

The Bank of New York

Corporate Trust Reorganization Unit Corporate Trust Reorganization Unit

101 Barclay Street 7 East (212) 298-1915

New York, New York 10286

For Information or Confirmation by Telephone:
(212) 815-3738

        Delivery of this Notice of Guaranteed Delivery to an address other than as set forth above or transmission of this Notice of Guaranteed Delivery via a facsimile number other than the number listed above will not constitute a valid delivery.

        This Notice of Guaranteed Delivery is not to be used to guarantee signatures. If a signature on a Letter of Transmittal is required to be guaranteed by an Eligible Institution (as defined therein) under the instructions thereto, such signature guarantee must appear in the applicable space provided in the signature box on the Letter of Transmittal.

Ladies and Gentlemen:

        The undersigned hereby tenders to Aon Corporation, a Delaware corporation (the "Company"), the aggregate principal amount of Original Notes indicated below pursuant to the guaranteed delivery procedures and upon the terms and subject to the conditions set forth in the accompanying Prospectus dated                         , 2003 (as the same may be amended or supplemented from time to time, the "Prospectus") and in the related Letter of Transmittal (which together with the Prospectus constitute the "Exchange Offer"), receipt of which is hereby acknowledged.

        The undersigned hereby represents, warrants and agrees that the undersigned has full power and authority to tender, exchange, sell, assign, and transfer the tendered Original Notes and that the Company will acquire good, marketable and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances when the tendered Original Notes are acquired by the Company as contemplated herein, and the tendered Original Notes are not subject to any adverse claims or proxies. The undersigned warrants and agrees that the undersigned and each Beneficial Owner will, upon request, execute and deliver any additional documents deemed by the Company or the Exchange Agent to be necessary or desirable to complete the tender, exchange, sale, assignment and transfer of the tendered Original Notes, and that the undersigned will comply with its obligations under the Registration Rights Agreement. The undersigned has read and agrees to all of the terms of the Exchange Offer.

        BY TENDERING ORIGINAL NOTES AND EXECUTING THIS NOTICE OF GUARANTEED DELIVERY, THE UNDERSIGNED HEREBY REPRESENTS AND WARRANTS THAT (i) NEITHER THE UNDERSIGNED NOR ANY BENEFICIAL OWNER(S) IS AN "AFFILIATE" OF THE COMPANY, (ii) ANY EXCHANGE NOTES TO BE RECEIVED BY THE UNDERSIGNED AND ANY BENEFICIAL OWNER(S) ARE BEING ACQUIRED BY THE UNDERSIGNED AND ANY BENEFICIAL OWNER(S) IN THE ORDINARY COURSE OF BUSINESS OF THE UNDERSIGNED AND ANY BENEFICIAL OWNER(S), (iii) THE UNDERSIGNED AND EACH BENEFICIAL OWNER HAVE NO ARRANGEMENT OR UNDERSTANDING WITH ANY PERSON TO PARTICIPATE IN A DISTRIBUTION (WITHIN THE MEANING OF THE SECURITIES ACT) OF EXCHANGE NOTES TO BE RECEIVED IN THE EXCHANGE OFFER, AND (iv) THE UNDERSIGNED OR ANY SUCH BENEFICIAL OWNER IS NOT ENGAGED IN, AND DOES NOT INTEND TO ENGAGE IN, A DISTRIBUTION (WITHIN THE MEANING OF THE SECURITIES ACT) OF SUCH EXCHANGE NOTES. IF THE UNDERSIGNED IS A BROKER-DEALER, IT ACKNOWLEDGES THAT IT WILL DELIVER A COPY OF THE PROSPECTUS IN CONNECTION WITH ANY RESALE OF THE EXCHANGE NOTES; HOWEVER, BY SO ACKNOWLEDGING AND BY DELIVERING A PROSPECTUS, THE UNDERSIGNED WILL NOT BE DEEMED TO ADMIT THAT IT IS AN "UNDERWRITER" WITHIN THE MEANING OF THE SECURITIES ACT.

        All questions as to the form of documents, validity, eligibility (including time of receipt) and acceptance for exchange of tendered Original Notes will be determined by the Company, in its sole discretion, whose determination shall be final and binding on all parties. The Company reserves the absolute right, in its sole and absolute discretion, to reject any and all tenders determined by the Company not to be in proper form or the acceptance of which, or exchange for, may, in the view of the Company or its counsel, be unlawful.

        All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned and every obligation of the undersigned hereunder shall be binding upon the heirs, executors, administrators, personal representatives, trustees in bankruptcy, legal representatives, successors and assigns of the undersigned.

2

Name(s) of Registered Holder(s):


Please Print

Address(es):




Area Code and Tel. No(s):


x



x



Signature(s) of Owner(s) or Authorized Signatory

        Must be signed by the registered holder(s) of the tendered Original Notes as their name(s) appear(s) on certificates for such tendered Original Notes, or on a security position listing, or by person(s) authorized to become registered holder(s) by endorsement and documents transmitted with this Notice of Guaranteed Delivery. If signature is by a trustee, executor, administrator, guardian, attorney-in-fact, officer or other person acting in a fiduciary or representative capacity, such person must set forth his or her full title below.

Certificate No(s)
(if available) Aggregate Principal
Amount Represented
by Certificate Aggregate Principal
Amount Tendered

        If Original Notes will be delivered by book-entry transfer to The Depository Trust Company, provide the following information:

Signature:

Account Number:

Date:

THE GUARANTEE ON THE REVERSE SIDE MUST BE COMPLETED

3

GUARANTEE
(Not to be used for signature guarantee)

        The undersigned, a firm or other entity identified in Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended, as an "eligible guarantor institution," including (as such terms are defined therein): (i) a bank; (ii) a broker, dealer, municipal securities broker, municipal securities dealer, government securities broker, government securities dealer; (iii) a credit union; (iv) a national securities exchange, registered securities association or clearing agency; or (v) a savings association that is a participant in a Securities Transfer Association recognized program (each of the foregoing being referred to as an "Eligible Institution"), hereby guarantees delivery to the Exchange Agent, at one of its addresses set forth above, either certificates for the Original Notes tendered hereby, in proper form for transfer, or confirmation of the book-entry transfer of such Original Notes to the Exchange Agent's account at The Depository Trust Company ("DTC"), pursuant to the procedures for book-entry transfer set forth in the Prospectus, in either case together with one or more properly completed and duly executed Letter(s) of Transmittal (or facsimile thereof or an Agent's Message in lieu thereof) and any other documents required by the Letter of Transmittal, all within three (3) business days after the date of execution of this Notice of Guaranteed Delivery.

        The undersigned acknowledges that it must communicate the guarantee to the Exchange Agent and must deliver the Letter of Transmittal and certificates for the Original Notes tendered hereby to the Exchange Agent within the time period shown hereon and that failure to do so could result in a financial loss to the undersigned.

Firm Authorized Signature



Name


Address (Please Type or Print)



Title


Zip Code

Dated                                                                , 2003

Area Code and Tel. No.:

        DO NOT SEND CERTIFICATES FOR ORIGINAL NOTES WITH THIS NOTICE OF GUARANTEED DELIVERY. ACTUAL SURRENDER OF ORIGINAL NOTES MUST BE MADE PURSUANT TO, AND BE ACCOMPANIED BY, A PROPERLY COMPLETED AND DULY EXECUTED LETTER OF TRANSMITTAL AND ANY OTHER REQUIRED DOCUMENTS.

4

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Exhibit 99.2

EX-99.3 12 a2101105zex-99_3.htm EX-99.3
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Exhibit 99.3

Aon CORPORATION

OFFER TO EXCHANGE
Its
7.375% Senior Notes due 2012
Which Have Been Registered Under the Securities Act of 1933
for Any and All of Its Outstanding
7.375% Senior Notes due 2012

                        , 2003

To Brokers, Dealers, Commercial Banks,
Trust Companies and Other Nominees:

        We are enclosing herewith an offer by Aon Corporation, a Delaware corporation (the "Company"), to exchange the Company's new 7.375% Senior Notes due 2012 (the "Exchange Notes") which have been registered under the Securities Act of 1933, as amended (the "Securities Act"), for any and all of the Company's outstanding 7.375% Senior Notes due 2012 (the "Original Notes"), upon the terms and subject to the conditions set forth in the accompanying Prospectus, dated                         , 2003 (as the same amended and supplemented from time to time, the "Prospectus"), and related Letter of Transmittal (which together with the Prospectus constitutes the "Exchange Offer").

        The Exchange Offer provides a procedure for holders to tender the Original Notes by means of guaranteed delivery.

        The Exchange Offer will expire at 5:00 p.m., New York City time, on                         , 2003, unless extended (the "Expiration Date"). Tendered Original Notes may be withdrawn at any time prior to 5:00 p.m., New York City time, on the Expiration Date, if such Original Notes have not previously been accepted for exchange pursuant to the Exchange Offer.

        Based on an interpretation by the staff of the Division of Corporation Finance of the Securities and Exchange Commission (the "SEC") as set forth in certain interpretive letters addressed to third parties in other transactions, Exchange Notes issued pursuant to the Exchange Offer in exchange for Original Notes may be offered for resale, resold and otherwise transferred by a holder thereof (other than a holder that is an "affiliate" of the Company within the meaning of Rule 405 under the Securities Act or a "broker" or "dealer" registered under the Securities Exchange Act of 1934, as amended (the "Exchange Act")), without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that such Exchange Notes are acquired in the ordinary course of such holder's business and such holder is not engaging, does not intend to engage, and has no arrangement or understanding with any person to participate, in the distribution of such Exchange Notes. See "Shearman & Sterling," SEC No-Action Letter (available July 2, 1993), "Morgan Stanley & Co., Inc.," SEC No-Action Letter (available June 5, 1991) and "Exxon Capital Holding Corporation," SEC No-Action Letter (available May 13, 1988). Accordingly, each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a Prospectus in connection with any resale of those Exchange Notes.

        The Exchange Offer is not conditioned on any minimum aggregate principal amount of Original Notes being tendered, except that Original Notes may be tendered only in an aggregate principal amount of $100,000 and integral multiples of $1,000 in excess thereof.

        Notwithstanding any other provisions of the Exchange Offer, or any extension of the Exchange Offer, the Company will not be required to accept for exchange, or to exchange any Exchange Notes for, any Original Notes and may terminate the Exchange Offer (whether or not any Original Notes have been accepted for exchange) or may waive any conditions to or amend the Exchange Offer, if any of the conditions described in the Prospectus under "The Exchange Offer—Conditions of the Exchange Offer" have occurred or exist or have not been satisfied.

        For your information and for forwarding to your clients for whom you hold Original Notes registered in your name or in the name of your nominee, we are enclosing the following documents:

1.
A Prospectus, dated                         , 2003.

2.
A Letter of Transmittal for your use and for the information of your clients.

3.
A printed form of letter which may be sent to your clients for whose accounts you hold Original Notes registered in your name or in the name of your nominee, with space provided for obtaining such clients' instructions with regard to the Exchange Offer.

4.
Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9 of the Internal Revenue Service (included in the Letter of Transmittal after the instructions thereto).

        WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE.

        Any inquiries you may have with respect to the Exchange Offer may be addressed to, and additional copies of the enclosed materials may be obtained from, the Exchange Agent at the following telephone number: (212) 815-3738.

Very truly yours,

Aon Corporation

        NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU AS THE AGENT OF THE COMPANY, THE EXCHANGE AGENT OR ANY OTHER PERSON, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE EXCHANGE OFFER OTHER THAN THE DOCUMENTS ENCLOSED HEREWITH AND THE STATEMENTS CONTAINED THEREIN.

2

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Exhibit 99.3

EX-99.4 13 a2101105zex-99_4.htm EX-99.4
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Exhibit 99.4

Aon CORPORATION

OFFER TO EXCHANGE
Its
7.375% Senior Notes due 2012
Which Have Been Registered Under the Securities Act of 1933
for Any and All of Its Outstanding
7.375% Senior Notes due 2012

                               , 2003

To Our Clients:

        Enclosed for your consideration are the Prospectus, dated                       , 2003 (as the same may be amended and supplemented from time to time, the "Prospectus"), and the related Letter of Transmittal (which together with the Prospectus constitute the "Exchange Offer"), in connection with the offer by Aon Corporation, a Delaware corporation (the "Company"), to exchange the Company's 7.375% Senior Notes due 2012 (the "Exchange Notes") which have been registered under the Securities Act of 1933, as amended (the "Securities Act"), for any and all of the Company's outstanding 7.375% Senior Notes due 2012 (the "Original Notes"), upon the terms and subject to the conditions set forth in the Exchange Offer. The Exchange Offer will expire at 5:00 p.m., New York City time, on                       , 2003, unless extended (the "Expiration Date").

        We are holding Original Notes for your account. An exchange of the Original Notes can be made only by us and pursuant to your instructions. The Letter of Transmittal is furnished to you for your information only and cannot be used by you to exchange the Original Notes held by us for your account. The Exchange Offer provides a procedure for holders to tender by means of guaranteed delivery.

        We request information as to whether you wish us to exchange any or all of the Original Notes held by us for your account upon the terms and subject to the conditions of the Exchange Offer.

        Your attention is directed to the following:

1.
The forms and terms of the Exchange Notes are the same in all material respects as the forms and terms of the Original Notes (which they replace), except that the Exchange Notes have been registered under the Securities Act. Interest on the Exchange Notes will accrue from the most recent June 14 or December 14 on which interest was paid or provided for on the Original Notes, or, if no interest has been paid or provided for on the Original Notes, from December 16, 2002.

2.
Based on an interpretation by the staff of the Division of Corporation Finance of the Securities and Exchange Commission (the "SEC"), as set forth in certain interpretive letters addressed to third parties in other transactions, Exchange Notes issued pursuant to the Exchange Offer in exchange for Original Notes may be offered for resale, resold and otherwise transferred by a holder thereof (other than a holder which is an "affiliate" of the Company within the meaning of Rule 405 under the Securities Act or a "broker" or "dealer" registered under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that such Exchange Notes are acquired in the ordinary course of such holder's business and such holder is not engaging, does not intend to engage, and has no arrangement or understanding with any person to participate, in the distribution of such Exchange Notes. See "Shearman & Sterling," SEC No-Action Letter (available July 2, 1993), "Morgan Stanley & Co., Inc.," SEC No-Action Letter (available June 5, 1991) and "Exxon Capital Holdings Corporation," SEC No-Action Letter (available May 13, 1988). Accordingly, each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange

Offer must acknowledge that it will deliver a Prospectus in connection with any resale of those Exchange Notes.

3.
The Exchange Offer is not conditioned on any minimum aggregate principal amount of Original Notes being tendered. The Exchange Notes will be exchanged for the Original Notes at the rate of $1,000 principal amount of Exchange Notes for $1,000 principal amount of Original Notes.

4.
Notwithstanding any other provisions of the Exchange Offer, or any extension of the Exchange Offer, the Company will not be required to accept for exchange, or to exchange any Exchange Notes for, any Original Notes and may terminate the Exchange Offer (whether or not any Original Notes have been accepted for exchange) or may waive any conditions to or amend the Exchange Offer, if any of the conditions described in the Prospectus under "The Exchange Offer—Conditions of the Exchange Offer" have occurred or exist or have not been satisfied.

5.
Tendered Original Notes may be withdrawn at any time prior to 5:00 p.m., New York City time, on the Expiration Date, if such Original Notes have not previously been accepted for exchange pursuant to the Exchange Offer.

6.
Any transfer taxes applicable to the exchange of Original Notes pursuant to the Exchange Offer will be paid by the Company, except as otherwise provided in Instruction 9 of the Letter of Transmittal.

        If you wish to have us tender any or all of your Original Notes, please so instruct us by completing, detaching and returning to us the instruction form attached hereto. An envelope to return your instructions is enclosed. If you authorize a tender of your Original Notes, the entire principal amount of Original Notes held for your account will be tendered unless otherwise specified on the instruction form. Your instructions should be forwarded to us in ample time to permit us to submit a tender on your behalf by the Expiration Date.

        The Exchange Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of the Original Notes in any jurisdiction in which the making of the Exchange Offer or acceptance thereof would not be in compliance with the laws of such jurisdiction or would otherwise not be in compliance with any provision of any applicable securities law.

2

Aon CORPORATION

OFFER TO EXCHANGE
Its
7.375% Senior Notes due 2012
Which Have Been Registered Under the Securities Act of 1933
for Any and All of Its Outstanding
7.375% Senior Notes due 2012

Instructions from Beneficial Owner

        The undersigned acknowledge(s) receipt of your letter and the enclosed Prospectus and the related Letter of Transmittal in connection with the offer by the Company to exchange Exchange Notes for Original Notes.

        This will instruct you to tender the principal amount of Original Notes indicated below held by you for the account of the undersigned, upon the terms and subject to the conditions set forth in the Prospectus and the related Letter of Transmittal.

        The undersigned represents that (i) the Exchange Notes acquired pursuant to the Exchange Offer are being obtained in the ordinary course of the undersigned's business, (ii) the undersigned is not engaging, does not intend to engage, and has no arrangement or understanding with any person to participate, in the distribution of such Exchange Notes, and (iii) the undersigned is not an "affiliate," as defined under Rule 405 of the Securities Act, of the Company. If the undersigned is a broker-dealer, it acknowledges that it will deliver a copy of the prospectus in connection with any resale of the Exchange Notes; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

Sign Here

Signature(s)

3

Securities which are to be tendered:

Tender all of the Original Notes

Aggregate Principal Amount*

o    Original Notes

Name(s) (Please Print)

Address

Zip Code

Area Code and Telephone No.

Dated:                                           , 2003

*
Unless otherwise indicated, it will be assumed that all of the Original Notes listed are to be tendered.

4

QuickLinks

Exhibit 99.4

~~-----END PRIVACY-ENHANCED MESSAGE-----~~

o		CHECK HERE IF CERTIFICATES REPRESENTING THE TENDERED ORIGINAL NOTES ARE ENCLOSED WITH THIS LETTER OF TRANSMITTAL.
o		CHECK HERE IF TENDERED ORIGINAL NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:


Name(s) and address(es) of registered holder(s), exactly as name(s) appear(s) on Original Notes, or on a security position	Certificate number(s) of Original Notes*	Aggregate principal amount represented by certificate(s)	Aggregate principal amount tendered**

		Name:
		Address:
		(Include Zip Code)
		(Tax Identification or Social Security Number)

o		Credit Exchange Notes or unexchanged Original Notes delivered by book-entry transfer to the DTC account set forth below:


SIGNATURE OF REGISTERED HOLDER(S) OR AUTHORIZED SIGNATORY (SEE GUARANTEE REQUIREMENT BELOW)
Dated
Name(s)
(Please Print)


Social Security Number(s) OR Federal Employer Identification Number(s)

NOTE:		FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN A $50 PENALTY IMPOSED BY THE INTERNAL REVENUE SERVICE AND BACKUP WITHHOLDING OF 30% OF ANY PAYMENTS MADE TO YOU PURSUANT TO AN OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
NOTE:		YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF THE SUBSTITUTE FORM W-9.

By Mail, Hand or Overnight Courier:		By Facsimile:
The Bank of New York		The Bank of New York
Corporate Trust Reorganization Unit		Corporate Trust Reorganization Unit
101 Barclay Street 7 East		(212) 298-1915
New York, New York 10286


Certificate No(s) (if available)	Aggregate Principal Amount Represented by Certificate	Aggregate Principal Amount Tendered


Firm		Authorized Signature
	Name
Address		(Please Type or Print)
	Title
Zip Code
	Dated , 2003

Securities which are to be tendered:
Tender all of the Original Notes
Aggregate Principal Amount*
o Original Notes
Name(s) (Please Print)
Address
Zip Code
Area Code and Telephone No.
Dated: , 2003