Aon Launches Human Resources Portal.

Business Editors

Robust Portal Enables HR Departments to Easily,

Efficiently and Cost-Effectively Serve Employees

Aon (NYSE: AOC) today announced the launch of its HR Portal Solution(SM) - a technology platform designed to allow human resources professionals to manage their entire HR function easily and effectively. This solution can be customized for a variety of organizations and allows for many uses - all designed to optimize current HR systems and to provide maximum convenience for the end user.

"As we consult with companies on their human resources issues, we continue to see an HR department that is being asked to play a more strategic, bottom-line focused role within the global business community," said Donald C. Ingram, Chairman and CEO, Aon Consulting. "The HR Portal Solution from Aon will enable companies to tackle the complex administration of the human resource function, allowing the HR professional to provide value-added, yet still cost-effective service to the organization."

Aon's HR Portal Solution has been designed with the goal of providing a consistent user experience across the entire range of HR applications. The HR Portal Solution is unique in its ability to provide seamless integration between Aon's world-class technology and a company's existing HR platforms. The HR Portal Solution incorporates the best in what Aon can provide to a client, while also leveraging the client's current investment in technology and third party relationships. All applications will be customized for the end-user, providing one look and feel for client companies and their employees.

Additionally, the HR Portal Solution provides employees of Aon client companies with a range of tools to help provide harmony between their work and family life. Support tools include health care information, maps to providers, financial planning and product purchase assistance, and access to a number of elective benefit products.

"We realize that HR portals are important tools for the HR department," stated Bernard F. Reynolds, president of Aon Consulting's Human Resources Outsourcing Group. "The Aon HR Portal Solution goes a step further by providing seamless application integration regardless of underlying platforms, enhancing an employee's work experience and helping companies in their effort to become an employer of choice."

About Aon

Aon Corporation (www.aon.com) is a holding company that is comprised of a family of insurance brokerage, consulting and underwriting subsidiaries.

Aon Consulting is among the top five global human resources consulting firms, with 2001 revenues of $938 million and 7,400 employees in 140 offices throughout the world. Aon Consulting delivers integrated consulting solutions to help clients with employee benefits, human resources outsourcing, compensation, communication and management consulting.

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 either historical or anticipated results, depending on a variety of factors. Potential factors that could impact results include the 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 and other loss contingencies, the final execution 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, rating agency actions, any proposed capital raising and the timing and terms associated therewith, and events surrounding terrorist attacks of September 11, 2001, including the timing and resolution of related insurance and reinsurance issues.