Aon Provides Update on World Trade Center Employees.

Business Editors

CHICAGO--(BUSINESS WIRE)--Sept. 14, 2001

Aon Corporation (NYSE: AOC) reported today that it continues to make every effort to locate the whereabouts of employees who may have been in lower Manhattan at the time of the World Trade Center attack.

Aon said it has determined that approximately 1,350 of its employees were potentially at risk during Tuesday's tragedy. This includes approximately 1,100 employees who were based in the Two World Trade Center offices and approximately 250 employees who were either traveling to New York City at that time or were located in Aon's other Lower Manhattan offices.

"It grieves me to report that at this time, despite all of our efforts, we have been unable to obtain information from any sources concerning the safety of approximately 200 Aon employees," said Aon Chairman and CEO Patrick G. Ryan.

"Gathering information about the safety of our employees has been a difficult and dynamic process, especially because so much of the early information about our employees' safety was collected during a very chaotic time. Therefore, we continue to work to reconfirm information regarding the status of all Aon employees who may have been involved."

Any Aon employee who has not had direct contact with our emergency hotline personnel is urged to call us immediately at 866.256.4154. In addition, anyone who might have information on the whereabouts of any Aon employee should call the hotline.

"We expect that it will be some time before we have a complete status of all of our employees. We are working with the hospitals, and have contacted federal, state, and local authorities to obtain information. We are doing everything we can to determine the whereabouts of each and every employee," Ryan said. "We thank everyone for their ongoing support and assistance."

Aon has established a Crisis Support Center at The Plaza Hotel at 59th Street and Fifth Avenue in New York City. Professional counselors will be on hand to provide group and individual counseling to employees and their friends and family, as well as provide employee benefits guidance. Additional Crisis Support Centers will be available beginning on Monday, September 17, at the following locations: Hyatt Regency Greenwich, 1800 East Putnam Ave., Greenwich, CT; Sheraton Hotel Parsippany, 199 Smith Road, Parsippany, NJ; Harrison Conference Center at Glen Cove, Dosoris Lane, Glen Cove, NY; and New York Marriott Brooklyn, 333 Adams Street, Brooklyn, New York. More information is available through our hotline at 866.256.4154.

An interfaith prayer service for Aon's employees, families and friends is scheduled for Monday, September 24, at 10:00 a.m. at St. Patrick's Cathedral in New York City. A service is also planned for Chicago on Tuesday, September 25. Details will be provided.

An Aon Assistance Fund has been established to provide help for Aon employees and family members affected by Tuesday's tragedy, and Aon will match contributions. Anyone wishing to donate should call 877.542.3301 or 312.381.3559. Information is also available on www.aon.com.

Aon's clients are also in serious need of assistance during this difficult time and require Aon's unique expertise. The Company has relocated many employees to alternative locations in the New York tri-state area and is working hard to establish a new main office in Manhattan. More information is expected to be available next week.

Aon Corporation (www.aon.com) is a holding company that is comprised of a family of insurance brokerage, consulting and insurance underwriting subsidiaries. Aon's common stock is listed on the New York, Chicago, Frankfurt and London stock exchanges.

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, the actual cost of resolution of contingent liabilities, the final form of the business transformation plan, the ultimate cost and timing of the implementation thereof, the actual cost savings and other benefits resulting therefrom, whether the Company ultimately implements the proposed spin-off of its underwriting operations, and the timing and terms associated therewith. 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.