<PAGE>
FILED PURSUANT RULE NO. 424(b)(3)
REGISTRATION NO. 333-49300
Prospectus
Aon Corporation
3,864,824 SHARES
COMMON STOCK
This prospectus relates to 3,864,824 shares of common stock of Aon
Corporation. The stockholders selling the shares in this offering have the
right to determine both the number of shares they will offer and the time or
times when they will offer the shares. They may sell the shares at the market
price at the time of sale or at such other prices as they may negotiate. All of
the shares covered by this prospectus were originally issued by the Company in
connection with the acquisition of ASA Acquisition Corp.
The selling stockholders will receive all of the net proceeds from the sale
of the shares offered hereby and will pay all underwriting discounts and
selling commissions, if any, applicable to the sale of the shares.
The common stock is traded on the New York Stock Exchange under the symbol
"AOC."
Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this prospectus is truthful or complete. Any representation to the contrary is
a criminal offense.
The date of this prospectus is November 15, 2000.
<PAGE>
TABLE OF CONTENTS
<TABLE>
<CAPTION>
Page
----
<S> <C>
Where You Can Find More Information........................................ 1
Special Note on Forward-Looking Statements................................. 2
Prospectus Summary......................................................... 3
The Offering............................................................... 3
Use of Proceeds............................................................ 4
Selling Stockholders....................................................... 4
Plan of Distribution....................................................... 17
Validity of Securities..................................................... 18
Experts.................................................................... 18
</TABLE>
<PAGE>
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
Securities and Exchange Commission at the SEC's Public Reference Room at 450
Fifth Street, N.W., Washington, D.C. 20549 or at the SEC's regional offices
located at Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661-2511 and 7 World Trade Center, Suite 1300, New York, New York
10048. You may obtain further information on the operation of the 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, the
Chicago Stock Exchange, 440 South LaSalle Street, Chicago, Illinois 60605 and
the London Stock Exchange, Old Broad Street, London, England EC2N1HP. You may
find additional information about Aon Corporation and its subsidiaries at our
Web site at http://www.aon.com.
This Prospectus constitutes a part of a registration statement on Form S-3
filed by the Company 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 and schedules we file
with the SEC. You may refer to the registration statement and the exhibits and
schedules for more information about us and our securities. The registration
statement and exhibits and schedules are also available at the SEC's Public
Reference Room or through its Web site.
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 file later with the SEC will automatically update and
supersede this information. We incorporate by reference the documents listed
below and any future filings we make with the SEC under Sections 13(a), 13(c),
14 or 15(d) of the Securities Exchange Act of 1934 until all of the securities
covered by this prospectus are sold by the selling stockholders.
. Annual Report on Form 10-K for the year ended December 31, 1999;
. Proxy Statement for the 2000 Annual Meeting of Stockholders filed March
6, 2000;
. Quarterly Report on Form 10-Q for the quarters ended March 31, 2000,
June 30, 2000 and September 30, 2000;
. Amendment to Quarterly Report on Form 10-Q/A for the quarter ended June
30, 2000;
. Current Report on Form 8-K dated May 9, 2000;
. Current Report on Form 8-K dated November 3, 2000; and
. The description of Aon Corporation's common stock contained in Item 12
of the registration statement on Form 10 filed on February 19, 1980
(when we were called Combined International Corporation), and any
amendment or report which we have filed (or will file after the date of
this Prospectus and prior to the termination of this offering) for the
purpose of updating such description, including Aon Corporation's
Current Report on Form 8-K dated April 23, 1987 and Current Report on
Form 8-K dated May 9, 2000.
You may obtain a copy of these filings, at no cost, by writing to or
telephoning us at the following address:
Aon Corporation
123 North Wacker Drive
Chicago, Illinois 60606
Telephone (312) 701-3000
Attention: Financial Relations Department
You should rely only on the information incorporated by reference or provided
in this Prospectus. We have not authorized anyone else to provide you with
different information. You should not assume that the information in this
Prospectus is accurate as of any date other than the date on the cover of the
applicable document. We are not making an offer of the securities in any state
where the offer or sale is not permitted.
<PAGE>
SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS
Some of the statements contained in or incorporated by reference in this
prospectus discuss our plans and strategies for our business or state other
forward-looking statements, as this term is defined in the Private Securities
Litigation Reform Act. The words "anticipates," "believes," "estimates,"
"expects," "plans," "intends" and similar expressions are intended to identify
these forward-looking statements, but are not the exclusive means of
identifying them. These forward-looking statements are subject to certain risks
and uncertainties that could cause actual results to differ materially from
historical results or those anticipated, depending on a variety of factors such
as general economic conditions in different countries around the world,
fluctuations in global equity and fixed income markets, downward commercial
property and casualty premium pressures, the competitive environment and the
actual cost of resolution of contingent liabilities.
In light of these risks, uncertainties and assumptions, the forward-looking
events discussed in or incorporated by reference in this prospectus might not
occur.
2
<PAGE>
PROSPECTUS SUMMARY
Aon Corporation
Aon Corporation is an insurance services holding company for a family of
insurance brokerage, consulting and consumer insurance companies. Through its
insurance brokerage and other services and consulting operations, Aon offers
commercial insurance brokerage, alternative risk solutions, risk management,
employee benefit and human resources consulting and managing general
underwriting services. In addition, Aon Corporation's insurance underwriting
businesses provide a variety of insurance products, including accident and
health coverage, traditional life insurance and extended warranties. Aon's
revenues were $7 billion in 1999. Based on 1999 insurance brokerage and
consulting revenues, we believe that Aon is the second largest insurance
brokerage company in the world.
Address
Our executive offices are located at 123 North Wacker Drive, Chicago,
Illinois 60606, Telephone (312) 701-3000.
THE OFFERING
<TABLE>
<C> <S>
Common stock offered by selling stockholders............. 3,864,824 shares
Common stock outstanding as of November 2, 2000.......... 260,323,977 shares
New York Stock Exchange Symbol........................... AOC
Use of proceeds.......................................... We will not receive any
proceeds from the sale
of the common stock
being offered hereby.
</TABLE>
The purpose of this offering is to register the resale of the shares of
common stock received by the selling stockholders in connection with our
acquisition of ASA Acquisition Corp., a New Jersey corporation. On October 2,
2000, Aon acquired all of the issued and outstanding common stock of ASA,
through the merger of a wholly-owned subsidiary of Aon, with and into ASA. In
connection with the merger, Aon entered into a registration rights agreement,
which requires Aon to use its best efforts to file, and cause to be declared
effective, a registration statement for the shares issued in the merger and to
keep the registration statement continuously effective until the earlier of
. the date on which all of the shares have been sold by the selling
stockholders, and
. two years following the date on which such registration statement was
declared effective by the SEC.
3
<PAGE>
USE OF PROCEEDS
The selling stockholders will receive all of the proceeds from any sale of
our common stock offered under this prospectus. We will not receive any
proceeds from the sale of the common stock offered under this prospectus.
SELLING STOCKHOLDERS
The following table sets forth:
(1) the name of each selling stockholder,
(2) the nature of any position, office or other material relationship
which each such selling stockholder has had with us or any of our
affiliates within the last three years,
(3) the number of shares of common stock owned by each such selling
stockholder prior to the offering,
(4) the number of shares of common stock owned offered for each such
selling stockholder's account, and
(5) the number of shares of common stock owned by each such selling
stockholder after completion of the offering.
All of the selling stockholders were employees or representatives of ASA at
or prior to the date of the merger of ASA with and into a subsidiary of Aon. A
substantial majority of the selling stockholders are employed by subsidiaries
of Aon. No selling stockholders will own one percent or more of our common
stock following the offering.
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Ramanand Achanta 429 429 0
Darius Adams 85 85 0
Terry Adamson 1,891 1,891 0
John Albrecht 1,891 1,891 0
Ian Alex 859 859 0
Vicken Alexanian 429 429 0
Anthony Allen 214 214 0
Michael J. Allen 1,074 1,074 0
Sandra Allende 515 515 0
David Alpert 6,876 6,876 0
Ruth Anderman-Lanza 644 644 0
Thomas P. Anderson 1,418 1,418 0
Irlande Andre-Johnson 42 42 0
Kristie L. Andresen 2,256 2,256 0
Ted Mark Andrews 10,744 10,744 0
Michael Andrews-Kulis 1,074 1,074 0
Robert Angelica 1,031 1,031 0
Mary Ann Arlt 43,057 43,057 0
Kevin R. Armant 9,670 9,670 0
Paulette Askew 85 85 0
Michelle Atchley 429 429 0
Bradley J. Au 3,438 3,438 0
Aleksander Ayerov 644 644 0
</TABLE>
4
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Suresh Babu 429 429 0
Thomas A. Bainbridge 859 859 0
Thomas G. Bainbridge 42,423 42,423 0
Cecilia Baita-Elhattab 644 644 0
John F. Balaban 6,876 6,876 0
Sofia Balios 644 644 0
Ricc Ballard 214 214 0
Brendon M. Banks 128 128 0
Laurie L. Banwart 214 214 0
Randall Barnett 1,117 1,117 0
Kalyan K. Basu 126,387 126,387 0
Bridget C. Bauer 85 85 0
Deborah Beatty 687 687 0
Art Beauchamp 6,876 6,876 0
Franklin B. Becker 164,777 164,777 0
Michele M. Becker 6,876 6,876 0
Michelle L. Belcaro 214 214 0
Debra Bellamy 429 429 0
Janet M. Bellis 429 429 0
June E. Benkiel 85 85 0
Nancy T. Bertram 429 429 0
Nimisha V. Bhatt 644 644 0
Ame R.T. Biggart 4,297 4,297 0
Amy Bigge 429 429 0
Gretchen Bilhardt 1,418 1,418 0
Leonard R. Billa 429 429 0
Ann Marie Black 773 773 0
Jennifer L. Black 429 429 0
Lori A. Black 85 85 0
Charles Blanchard 214 214 0
Jay E. Blumenreich 1,719 1,719 0
Luke Bodenstein 429 429 0
Carol A. Boettger 558 558 0
Christopher M. Bone 116,457 116,457 0
Larry Booth 85 85 0
Scott Borchers 429 429 0
Lewis Borgenicht 24,743 24,743 0
Lesley Bourne 515 515 0
Deborah Bowers 128 128 0
Stephen Boyar 12,893 12,893 0
Jo-Anne Bragg 1,074 1,074 0
Ben S. Brandon 2,041 2,041 0
Joseph Brechka 1,074 1,074 0
John Breitwieser 1,289 1,289 0
Mary Denise Bruton 988 988 0
Stephen Bryson 7,736 7,736 0
Mark Brzostowski 7,736 7,736 0
James F. Buchanan 429 429 0
Jeffrey Buchman 2,793 2,793 0
</TABLE>
5
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Ronald W. Buesser 1,289 1,289 0
Michael Bullard 12,356 12,356 0
Alexa R. Bullock 429 429 0
Carol D. Bunton 1,074 1,074 0
Victor Buonopane 1,891 1,891 0
Roger L. Burke 85 85 0
Thomas J. Burmester 988 988 0
Minh Byers 85 85 0
Jose R. Cadiz 85 85 0
Natalie A. Calello 214 214 0
Maria Victoria Calica 85 85 0
Leith S. Camden 85 85 0
John Cameron 214 214 0
Susan M. Cannata 214 214 0
Michelle A. Capetillo 85 85 0
Robert C. Capperella 1,289 1,289 0
Korin R. Cardinal 85 85 0
Linda M. Cardone 128 128 0
Sean A. Carpenter 644 644 0
William M. Carroll 8,595 8,595 0
Joseph Carter 1,289 1,289 0
Maria Carter 214 214 0
Jeff Chad 7,306 7,306 0
Louise Chambers 1,504 1,504 0
Jonathan L. Cheney 1,418 1,418 0
Andrew Cheung 429 429 0
Chin Il Choe 644 644 0
Susan Choe 1,289 1,289 0
Barbara Christie-Solomon 644 644 0
Charles J. Clark 13,287 13,287 0
John E. Clarkin 214 214 0
Nikki L. Cleaves 214 214 0
Pamela M. Cohen 2,793 2,793 0
Staci C. Coleman 85 85 0
Colin Condie 859 859 0
Luiza Console 1,074 1,074 0
Lawrence Cooney 214 214 0
Sharogerlene Cooper 85 85 0
Thomas A. Cooper 6,876 6,876 0
Mary Frances Copeland 773 773 0
Lynda G. Costello 601 601 0
Martina Cousin 429 429 0
Michele A. Craine 859 859 0
Anthony S. Crisci, Jr. 429 429 0
John D. Cronin 214 214 0
Christine M. Cukor 214 214 0
Darlene M. Culbertson 644 644 0
David B. Cullinan 1,418 1,418 0
Josie Darby 128 128 0
</TABLE>
6
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Normarie Davis 859 859 0
James C. Daw 1,332 1,332 0
Sherry A. Deen-Narain 128 128 0
Amy DeLorenzo 687 687 0
Freddie L. Dennis 773 773 0
Doreen Devine 4,297 4,297 0
Karim Dhanani 1,719 1,719 0
Sherry Dineen 644 644 0
Lucas DiPalermo 429 429 0
Lynn W. Dippold 8,595 8,595 0
Thomas J. Dolan 14,474 14,474 0
Thomas P. Dolan 5,587 5,587 0
Ronald J. Dolecki 31,869 31,869 0
Dee Dominick Bradley 1,418 1,418 0
Linda M. Downing 128 128 0
Gertrude E. Downs 644 644 0
Patricia Dowse 128 128 0
Nathan J. Drapkin 752 752 0
Carol Droppa 558 558 0
Babu Dukkipati 257 257 0
Swarna Dukkipati 214 214 0
Douglass S. Dunbar 8,488 8,488 0
Sharon L. Duronio
Kophamel 2,256 2,256 0
Melissa M. Dutcher 429 429 0
Tracy E. Eaton 257 257 0
Steven H. Ellner 4,297 4,297 0
David Engelhaupt 214 214 0
Marybeth Eppig 429 429 0
Christian Eyert 128 128 0
Robert J. Fallon 1,289 1,289 0
Robert B. Fane 1,289 1,289 0
Karen M. Fanis 85 85 0
Leonard Farrell 429 429 0
Anthony V. Ferraro 5,802 5,802 0
Karen E. Fischer 1,891 1,891 0
Franklin L. Fisher 10,959 10,959 0
Morris Fishman 8,058 8,058 0
Teresa Fitzsimmons 214 214 0
Mary P. Flynn 85 85 0
Edward W. Fox 14,196 14,196 0
Mark David Frankel 3,438 3,438 0
Frank Fratoni 322 322 0
Dee Ann Frawley 1,074 1,074 0
David Freeman 1,676 1,676 0
Thomas Freiler 214 214 0
Eddie J. French 85 85 0
CindyLou Fresas 1,074 1,074 0
Kevin W. Fuller 257 257 0
Kathleen Gail 1,504 1,504 0
</TABLE>
7
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Matthew T. Gallardo 85 85 0
Gerald Gallimore 214 214 0
JoAnn Gallimore 816 816 0
Kimberly Gambles 773 773 0
Felix I. Garcia 322 322 0
Samuel Garcia 85 85 0
Sondra Gardiner 644 644 0
Sherilynn Gardner-Pitre 1,074 1,074 0
Deanna Gee 945 945 0
Jeanette R. Gibson 1,418 1,418 0
Dena R. Giovingo 85 85 0
John J. Gish 150,896 150,896 0
Lane L. Glasgow 1,869 1,869 0
William T. Gleason 214 214 0
Lawrence Golden 21,715 21,715 0
Raja Gopalan 257 257 0
G. Hart Gordon 1,289 1,289 0
Douglas Gore 214 214 0
Michelle M. Graham 515 515 0
Barbara Gross 730 730 0
Linda Grosso 10,744 10,744 0
Robert Grotyohann 10,271 10,271 0
Joann Gryn 85 85 0
Stephen W. Grywalski 42 42 0
John Grywalski, Jr. 29,547 29,547 0
Michael J. Gulotta 456,719 456,719 0
Michael J. Gulotta Jr. 859 859 0
Eric Haensgen 85 85 0
Daniel A. Hajjar 21,381 21,381 0
Linda E. Hakala 644 644 0
Andrea M. Hall 8,380 8,380 0
Sandra Hallman 1,504 1,504 0
Nancy Halloran 214 214 0
Rodney G. Hannah 644 644 0
Donald P. Harrington 106,168 106,168 0
Michael E. Harris 85 85 0
Roger C. Harris 4,297 4,297 0
Sherman Harris 214 214 0
James B. Harvey 85 85 0
Diann Z. Hatcher 773 773 0
Diane L. Hauschild 472 472 0
Don Hawes 1,289 1,289 0
Jane Hawes 85 85 0
Terry W. Hayes 85 85 0
John A. Hebenstreit 1,826 1,826 0
Frederick N. Heidorn 12,893 12,893 0
Lenard Henley 85 85 0
Ellen Hennessy 80,046 80,046 0
Diane K. Herwehe 85 85 0
</TABLE>
8
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
James L. Hess 112,679 112,679 0
Scott Himmelspach 214 214 0
Mindy S. Hintelmann 730 730 0
Dennis T. Hirata 1,719 1,719 0
Kevin Ho 859 859 0
Stephen Hoeffner 17,938 17,938 0
Mark A. Hollis 1,418 1,418 0
Kathleen Holness 20,610 20,610 0
Donna Holt 128 128 0
Wendy W. Hom 5,587 5,587 0
Tsochih Hong 2,578 2,578 0
Thomas C. Hoskins 1,418 1,418 0
Bi-Hwa Huang 644 644 0
Matthew Hucher 429 429 0
Cyrus W. Huneycutt 1,891 1,891 0
Chi Heng Hung 2,901 2,901 0
Mandy Hussey 214 214 0
Colin Hwang 343 343 0
Jeannie Hwang 7,306 7,306 0
Dennis Hyland 2,578 2,578 0
Pina Infusini 1,246 1,246 0
Gregory Ingle 1,074 1,074 0
Barbara Iocca 214 214 0
Sheree Jaeck 1,289 1,289 0
Richard Jaffke 2,578 2,578 0
Alexander J. Jaloway 752 752 0
Allen James 3,438 3,438 0
John Jarka 8,595 8,595 0
John T. Jarusiewicz 1,719 1,719 0
Thomas H. Jarusiewicz 429 429 0
Raymond A. Jasinski 773 773 0
Tyler A. Jayroe 644 644 0
George H. Jelinski 429 429 0
Elaine E. Jennings 12,893 12,893 0
Sujatha Jeyaraman 214 214 0
Steven G. Johnson 816 816 0
Eleanor Jones 429 429 0
Kenneth S. Jones 1,031 1,031 0
Monique Jones 472 472 0
Patricia Jones 85 85 0
Shirley Jones 773 773 0
John Joynes 644 644 0
Kathleen A. Jurs 644 644 0
Janice M. Karlson 214 214 0
Suzanne R. Katambwe 429 429 0
Andrea Katz 6,876 6,876 0
Raymond Keane 773 773 0
Marytherese Kedzie 214 214 0
Adele Kellman 8,595 8,595 0
</TABLE>
9
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Cynthia F. Kelly 429 429 0
Kathleen Kelly 730 730 0
Allyson Kemka 214 214 0
Joseph M. Kemka 34,424 34,424 0
Julia Kent 429 429 0
Abdul S. Kerim 85 85 0
Zaid F. Khalil 429 429 0
Mohammad Z. Khan 128 128 0
Karen W. Khan Curley 2,793 2,793 0
Elizabeth Khazzam 214 214 0
Richard Kiehn 214 214 0
Thomas P. Kilroy 85 85 0
Kristine A. Klepper 4,297 4,297 0
Bradford Klinck 32,278 32,278 0
Edward Klos 25,249 25,249 0
Erin A. Knoell 429 429 0
Paul L. Koch 2,901 2,901 0
Michael Konarski 214 214 0
Joanna Kostrzewa 644 644 0
Patricia A. Kowall 429 429 0
Cheryl J. Kramer Rothman 4,297 4,297 0
Ramraj Krishnan 1,074 1,074 0
Linda Kruse 1,289 1,289 0
Hazel Judith Kuffer 128 128 0
Hui-Lin Kuo 988 988 0
Janice C. Kupka 85 85 0
Scott P. Kutcher 1,074 1,074 0
Mandy R. Laesch 214 214 0
Louis A. Laffin 429 429 0
Beverly G. Landstrom 171,470 171,470 0
Vanessa Lannert 558 558 0
Troy M. LaRue 902 902 0
Ky T. Le 1,719 1,719 0
Martha G. Leahy 85 85 0
James T. Lecher 644 644 0
Paul Lee 859 859 0
Dawn R. Lemke 85 85 0
Helen Leung 1,074 1,074 0
Paula F. Lewin 85 85 0
Debbie S. Liebeskind 1,289 1,289 0
Wei-Liang Lin 2,148 2,148 0
Mary Liscoumb 343 343 0
Henry Lo 128 128 0
Rita L. Lo 2,578 2,578 0
Malaika Lock 85 85 0
Amy L. Loether 8,595 8,595 0
Lynn Lombardo 429 429 0
Lisa Lombardo-Claus 1,074 1,074 0
Kimberly C. Lorenz 214 214 0
</TABLE>
10
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Patricia M. Losey 214 214 0
Amy J. Lucks 644 644 0
Thomas E. Luther 644 644 0
James L. Lutrell 322 322 0
Scott J. Macey 98,650 98,650 0
Katie J. Maldonado 128 128 0
Sandra D. Malebranche 472 472 0
Robert Malone 1,289 1,289 0
Anthony N. Manganello 85 85 0
Gary Mann 4,297 4,297 0
Melissa R. Manza 429 429 0
Scott Margolin 1,375 1,375 0
Paul F. Marmora 2,148 2,148 0
Susan D. Marsh 6,016 6,016 0
Marjorie R. Martin 4,297 4,297 0
Michele Mastropolo 214 214 0
Arliss Matich 85 85 0
Shea D. Maultsby 8,595 8,595 0
Michael J. Maxwell 15,848 15,848 0
Kenneth Mayda 7,521 7,521 0
Michael Mayhew 214 214 0
Geraldine Mazalewski 214 214 0
Mary E. Mazurek 558 558 0
John McCarthy 859 859 0
Dorothy McFarland 558 558 0
Eileen McGee 902 902 0
Eileen McGrath 1,074 1,074 0
William David McKinnie,
III 38,808 38,808 0
Daniel R. McMonagle 1,719 1,719 0
Martin Meadow 644 644 0
Thomas W. Meagher 65,258 65,258 0
Christopher Mealin 128 128 0
Henry J. Mealin 39,381 39,381 0
John Mealin 33,743 33,743 0
Jillian Medoff 1,074 1,074 0
Paula Melendez 773 773 0
Elizabeth A. Mendola 472 472 0
Carmen Metcalfe 1,074 1,074 0
Nancy J. Mienhardt 1,418 1,418 0
Alice Miller 429 429 0
Daniel Miller 6,876 6,876 0
David C. Miller 16,414 16,414 0
John J. Miller 44,482 44,482 0
Monika Minor 214 214 0
Lawrence A. Moellers 85 85 0
Theresa A. Mohr 902 902 0
Stacey Montgomery 128 128 0
Kenneth C. Morgan 24,239 24,239 0
Nancy K. Mueller 85 85 0
</TABLE>
11
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Arthur Murphy 7,736 7,736 0
John Murphy 2,148 2,148 0
Sandra B. Murray 644 644 0
David Myles 128 128 0
Sujatha Nampalli 85 85 0
Christopher A. Narcisco 85 85 0
Wendy A. Neal 1,117 1,117 0
Glen C. Nebel 3,653 3,653 0
Paul M. Nelson 85 85 0
Jonathan Nemeth 50,439 50,439 0
John Nestico 8,595 8,595 0
Khanh Nguyen 214 214 0
Andrzej T. Niewiadomski 1,719 1,719 0
Mien H. Niu 2,578 2,578 0
Thomas E. Norton 46,405 46,405 0
Maritza L. Nowakowski 2,041 2,041 0
Denise B. O'Bara 773 773 0
Jessica M. Occhino 644 644 0
George F. O'Donnell 18,056 18,056 0
Florence O. Odufu 85 85 0
Femi O. Odulana 1,289 1,289 0
Christine M. Olhava-Ablin 42 42 0
Elizabeth A. Olson 1,719 1,719 0
Linda Orr 558 558 0
Alan Oskowsky 15,250 15,250 0
John O'Sullivan 8,058 8,058 0
Dorothy M. Ott 257 257 0
Stanislaw Pade 1,611 1,611 0
Joseph J. Pagano 1,418 1,418 0
Brenda Page 128 128 0
Denise Page 85 85 0
Janna M. Paolino 85 85 0
Thomas J. Parciak 17,191 17,191 0
Madonna Parker 429 429 0
John C. Parr 3,008 3,008 0
Timothy Parris 214 214 0
Raymount Paschal 85 85 0
Rodney Paschal 558 558 0
Ankita M. Patel 85 85 0
Margi Patel 85 85 0
Joseph Paterno 429 429 0
Dean Pedretti 1,074 1,074 0
Maria L. Perez 429 429 0
Auburn Perkins 257 257 0
Raymond Perry 945 945 0
Robert Perry 128 128 0
Shannon Perry-Tucker 730 730 0
Meggen Peterson 429 429 0
Gina Petrone-Mumolie 1,289 1,289 0
</TABLE>
12
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Stephanie Pfeiffer 42 42 0
Thi M. Pham 128 128 0
Linda S. Phillips 558 558 0
Marklyn W. Pierre 85 85 0
Vinita Pilani 257 257 0
Luc Pomerleau 1,891 1,891 0
Khuzema Poonawala 85 85 0
Dylan Porter 3,438 3,438 0
David P. Previte 1,719 1,719 0
Doug L. Pryor 2,793 2,793 0
Amin Purshottam 429 429 0
Ann Rachel Quesada 33,542 33,542 0
Antonio P. Quesada 1,611 1,611 0
Kathleen A. Quinn 42 42 0
Vivian V. Quintanilla 42 42 0
Hugh R. Raines 429 429 0
Jennifer Rambusch 429 429 0
Neela K. Ranade 35,746 35,746 0
Joi Randall 214 214 0
Christine Randle 1,719 1,719 0
Otis C. Ray 17,168 17,168 0
Nancy A. Reach 1,332 1,332 0
Mary Elizabeth Redding 7,521 7,521 0
Robert Reddington 68,764 68,764 0
Rebecca W. Redman 1,934 1,934 0
Susan M. Rees 644 644 0
W. Mitchell Rees 7,521 7,521 0
Anne M. Reminger 214 214 0
Leslie H. Richmond 21,265 21,265 0
Nicole A. Rickmond 472 472 0
Judith Ringlein-Dunn 257 257 0
Calvin R. Roberson 85 85 0
Trish A. Roberts 1,418 1,418 0
Elizabeth Robinson 257 257 0
Jeffrey Robinson 4,297 4,297 0
John T. Rock 429 429 0
Mary C. Romash 644 644 0
Beverly S. Rose 10,744 10,744 0
Donna L. Rose 644 644 0
Mark Rosenberg 4,297 4,297 0
Rachel Rosengard 902 902 0
Lester J. Rosensaft 183,229 183,229 0
Randall Roth 902 902 0
Allen J. Rothman 35,853 35,853 0
Wanda Russell 7,521 7,521 0
Gordon Rutledge 3,438 3,438 0
Jack Sabley 257 257 0
Sylvia Sae 558 558 0
Rafael Sanchez 1,289 1,289 0
</TABLE>
13
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Benjamin J. Sandborg 429 429 0
Antonietta Sartor 107 107 0
Ingalill Saxena 1,891 1,891 0
John Scala 1,891 1,891 0
Cheryllee Schachel 644 644 0
Andrew F. Schifler 902 902 0
Rita L. Schmieder 85 85 0
Clarin S. Schwartz 40,184 40,184 0
Barry K. Schwebs 1,461 1,461 0
Karen A. Sefcik 4,942 4,942 0
Frank B. Senese 988 988 0
Deborah J. Sessoms 1,504 1,504 0
Kelly Shah 6,876 6,876 0
Amy Sham 1,891 1,891 0
Sherry Shaw-Kobee 429 429 0
Yelena Shchekina 214 214 0
Brian R. Shepherd 85 85 0
Donna Sherratt-Bado 322 322 0
Mary-Catherine Shiflett 1,719 1,719 0
Stephen H. Shub 6,446 6,446 0
Jefferson T. Simmons 128 128 0
Michelle M. Sims 214 214 0
Scott B. Singhass 214 214 0
Richard C. Skibinski 85 85 0
Leigh Ann Smargiassi 644 644 0
Craig S. Smith 214 214 0
Gerald Smith 1,289 1,289 0
Kenyata Smith 85 85 0
Lisa M. Smith 214 214 0
Ricardo Smith 85 85 0
James M. Smitreski 15,790 15,790 0
Nicole Sojka 429 429 0
Martha Solorzano 472 472 0
Leslie K. Soo Hoo 6,876 6,876 0
Maribel Soto 214 214 0
Matthew Spicer 214 214 0
Vicki Squire-Hall 257 257 0
Vincent Stesner 2,578 2,578 0
William F. Stopa 1,160 1,160 0
Ellen Stuckey 214 214 0
Stephanie L. Sturm 85 85 0
Alene Styles-Glover 1,246 1,246 0
Lisa Stylianou 214 214 0
Warren P. Suggs 12,893 12,893 0
Bretta S. Summerour 85 85 0
Eric Summers 1,418 1,418 0
Ying Loi Sung 2,578 2,578 0
Jon D. Sutcliffe 6,016 6,016 0
John Swaney 429 429 0
</TABLE>
14
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Jill A. Syftestad 128 128 0
Rezzelline Tan 128 128 0
Nancy M. Tartaro 14,082 14,082 0
Chris D. Taylor 214 214 0
Valencia Taylor 214 214 0
James Teasley 429 429 0
Nancy Thacker 859 859 0
Juna Thelemaque 429 429 0
Evelyn E. Thomas 429 429 0
Jenean D. Thomas 85 85 0
Raymond N. Thomas 21,301 21,301 0
Andrew W. Thompson 3,438 3,438 0
Barbara Thurman 558 558 0
Sani Timbadia 429 429 0
Sharon Tomita 1,289 1,289 0
Pamela Y. Toussaint 26,898 26,898 0
Ollie Treadway 5,587 5,587 0
Louis Tremblay 1,246 1,246 0
Marie Frances Trometer 429 429 0
Thau-Yung Tsao 429 429 0
Alan Turetz 25,795 25,795 0
Andrzej Tyminski 773 773 0
Christine J. Ubertaccio 4,297 4,297 0
Richard Vair 21,488 21,488 0
April H. Valerio 214 214 0
Lynda Van Hoorn 214 214 0
Douglas Varga 1,418 1,418 0
Pamela S. Vaughn 214 214 0
Vinod Vedvyas 2,148 2,148 0
Ada C. Villahermosa 214 214 0
Lucretia Benee Vinson 85 85 0
Aimee L. Viola 22,603 22,603 0
Marie Vladic 85 85 0
F. Randy Vogenberg 8,595 8,595 0
Shawn C. Vollmann 429 429 0
Robert Wagner 1,160 1,160 0
Elaine Walsh 859 859 0
Augustine Wan 1,375 1,375 0
Bor-Sing Wang 2,578 2,578 0
Edward D. Ward 429 429 0
Mary M. Ward 6,876 6,876 0
Kimberly C. Warwick 1,160 1,160 0
Eddie R. Watson II 472 472 0
James W. Wells 1,869 1,869 0
Kenneth R. Wells 6,876 6,876 0
Vernetta S. Wells 1,504 1,504 0
Michael J. Whalen 214 214 0
Amie D. White 214 214 0
Wanda White 558 558 0
</TABLE>
15
<PAGE>
<TABLE>
<CAPTION>
Number of Number of Number of
Shares Owned Shares to Shares Owned
Selling Stockholder Prior to Offering be Sold After Offering
------------------- ----------------- --------- --------------
<S> <C> <C> <C>
Jeanne Whitmore 214 214 0
James R. Wiggins 1,074 1,074 0
Jennifer J. Wikstrom 128 128 0
Henry B. Wilantewicz III 644 644 0
B. Jill Wilkinson 214 214 0
Thomas J. Will 17,282 17,282 0
Jacqueline Williams 85 85 0
Patricia I. Wilner 1,074 1,074 0
Lawrence F. Wilson 6,446 6,446 0
Hoi Shun Wong 128 128 0
Christopher R. Wood 214 214 0
Michael G. Worthen 214 214 0
Hugh L. Worthington 257 257 0
Harry Wright 25,249 25,249 0
Philip Wright 16,670 16,670 0
Suzanne C. Wyatt 1,418 1,418 0
Charlotte Yankowski 429 429 0
Maryann Yim 1,289 1,289 0
David P. York 1,074 1,074 0
Gretchen K. Young 5,501 5,501 0
Gloria Zanders 85 85 0
Thomas M. Zavist 3,438 3,438 0
Kelley Zittinger 214 214 0
John Zolecki 429 429 0
---------
3,864,824
=========
</TABLE>
16
<PAGE>
PLAN OF DISTRIBUTION
We will receive no part of the proceeds of any sales made hereunder. We will
pay all expenses of registration incurred in connection with this offering and
in connection with the offering and sale of the shares, other than commissions,
discounts and fees of underwriters, dealers or agents. All selling and other
expenses incurred by the selling stockholders will be borne by the selling
stockholders.
The selling stockholders and any broker-dealers participating in the
distribution of the shares may be deemed to be "underwriters" within the
meaning of the Securities Act of 1933, and any commissions or discounts given
to any such broker-dealer may be regarded as underwriting commissions or
discounts under that Act.
The selling stockholders may from time to time sell all or a portion of the
shares on the New York Stock Exchange or on any national securities exchange on
which our common stock may be listed or traded, in negotiated transactions or
otherwise, at prices then prevailing or related to the then current market
price or at negotiated prices. The shares will not be sold in an underwritten
public offering. The shares may be sold directly or through brokers or dealers.
The methods by which the shares may be sold include:
(1) a block trade (which may involve crosses) in which the broker or
dealer so engaged will attempt to sell the shares as agent but may position
and resell a portion of the block as principal to facilitate the
transaction;
(2) purchases by a broker or dealer as principal and resale by such
broker or dealer for its account pursuant to this prospectus;
(3) ordinary brokerage transactions and transactions in which the broker
solicits purchasers; and
(4) privately negotiated transactions.
In effecting sales, brokers and dealers engaged by the selling stockholders
may arrange for other brokers or dealers to participate. Brokers or dealers may
receive commissions or discounts from the selling stockholders (or, if any such
broker-dealer acts as agent for the purchaser of such shares, from such
purchaser) in amounts to be negotiated which are not expected to exceed those
customary in the types of transactions involved. Broker-dealers may agree with
the selling stockholders to sell a specified number of such shares at a
stipulated price per share, and, to the extent such broker-dealer is unable to
do so acting as agent for a selling stockholder, to purchase as principal any
unsold shares at the price required to fulfill the broker-dealer commitment to
such selling stockholder. Broker-dealers who acquire shares as principal may
thereafter resell such shares from time to time in transactions (which may
involve crosses and block transactions and sales to and through other broker-
dealers, including transactions of the nature described above) in the over-the-
counter market or otherwise at prices and on terms then prevailing at the time
of sale, at prices then related to the then-current market price or in
negotiated transactions and, in connection with such resales, may receive from
the purchasers of such shares commissions as described above.
In connection with the distribution of the shares, the selling stockholders
may enter into hedging transactions with broker-dealers. In connection with
such transactions, broker-dealers may engage in short sales of the shares in
the course of hedging the positions they assume with the selling stockholders.
The selling stockholders may also sell the shares short and redeliver the
shares to close out the short positions. The selling stockholders may also
enter into option or other transactions with broker-dealers, which require the
delivery to the broker-dealer of the shares. The selling stockholders may also
loan or pledge the shares to a broker-dealer and the broker-dealer may sell the
shares so loaned or upon a default the broker-dealer may effect sales of the
pledged shares. In addition to the foregoing, the selling stockholders may
enter into, from time to time, other types of hedging transactions.
The selling stockholders and any broker-dealers participating in the
distributions of the shares may be deemed to be "underwriters" within the
meaning of Section 2(11) of the Securities Act of 1933 and any profit
17
<PAGE>
on the sale of shares by the selling stockholders and any commissions or
discounts given to any such broker-dealer may be deemed to be underwriting
commissions or discounts under that Act.
In addition, any shares covered by this Prospectus that qualify for sale
pursuant to Rule 144 may be sold under Rule 144 under the Securities Act rather
than pursuant to this Prospectus.
VALIDITY OF SECURITIES
The validity of the securities will be passed upon for us by Richard E.
Barry, our Senior Counsel and Assistant Secretary. As of October 27, 2000, Mr.
Barry owned 2,744 shares of Aon Corporation common stock, held restricted stock
awards of 33,970 shares and 6,000 unvested stock options. In addition, 3,633
shares of Aon Corporation common stock held by its employee stock ownership
plan and savings plan were attributable to Mr. Barry.
EXPERTS
The consolidated financial statements of Aon Corporation incorporated by
reference in Aon Corporation's Annual Report (Form 10-K) for the year ended
December 31, 1999 and the related financial statement schedules included
therein have been audited by Ernst & Young LLP, independent auditors, as set
forth in their reports thereon included or incorporated by reference therein
and incorporated herein by reference. Such consolidated financial statements
and schedules are incorporated herein by reference in reliance upon such
reports 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, 2000 and March 31,
1999, the six-month periods ended June 30, 2000 and June 30, 1999, and the
nine-month periods ended September 30, 2000 and September 30, 1999,
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 Forms 10-Q for the quarters
ended March 31, 2000, June 30, 2000 and September 30, 2000, 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
of 1933 (the "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 Act.
18
