Aon Acquires ARM Tech, Publisher of Practical Risk Management
Aon Acquires ARM Tech, Publisher of Practical Risk Management Chicago (July 10, 2000) - Aon today announced that it has acquired Advanced Risk Management Techniques, Inc. (ARM Tech), a risk management, actuarial and insurance consulting firm with more than $3 million in annual revenues. Terms of the transaction were not disclosed.

ARM Tech specializes in risk management consulting in the health care, construction, utility, association/pool and public entity industries. In addition, the firm publishes Practical Risk Management, a comprehensive risk management reference guide published since 1974. Aon will continue to publish this handbook in addition to maintaining its quarterly updates, and an online version at www.pracrisk.com.

"In addition to its expertise in risk management and consulting, ARM Tech is a respected source of key industry information," said Michael D. O'Halleran, president and chief operating officer of Aon. "We are pleased to have ARM Tech's valuable skills on Aon's team."

"Aon leads the industry in developing and providing timely news, information and risk management services to its clients," said Steven P. Kahn, a principal at ARM Tech. "We are all extremely excited about the opportunity to combine the broad resources Aon offers, with our own focused industry expertise."

In addition to Kahn, ARM Tech's principals are Michael M. Kaddatz and Steven A. Glicksman. The firm employs 18 people at its Lake Forest, California, offices. The transaction is subject to requisite regulatory approvals.

Aon Corporation is a holding company that comprises a family of insurance brokerage, consulting, and underwriting subsidiaries. Aon common stock (Symbol AOC) is listed on the Chicago, Frankfurt, London and New York stock exchanges. Visit www.aon.com for more information.

This press release may contain certain statements relating to future results, which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. 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, changes in commercial property and casualty premium rates, the competitive environment and the actual cost of resolution of contingent liabilities. Further information concerning the company and its business, including factors that potentially could materially affect the company's financial results are contained in the company's filings with the Securities and Exchange Commission.