MMC CHIEF EXECUTIVE OFFICER MICHAEL CHERKASKY TO SPEAK AT KEEFE, BRUYETTE & WOODS 2005 INSURANCE CONFERENCE ON SEPTEMBER 7

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NEW YORK, NEW YORK, August 30, 2005 - Michael G. Cherkasky, president and chief executive officer of Marsh & McLennan Companies, Inc. (MMC), will speak at the Keefe, Bruyette & Woods 2005 Insurance Conference on Wednesday, September 7, 2005 at 10:30 a.m. Eastern Daylight Time.

The live audio webcast of Mr. Cherkasky's presentation can be accessed at http://www.mmc.com/conference.html. A replay will be available approximately two hours after the presentation.

MMC is a global professional services firm with annual revenues exceeding $12 billion. It is the parent company of Marsh, the world's leading risk and insurance services firm; Guy Carpenter, the world's leading risk and reinsurance specialist; Kroll, the world's leading risk consulting company; Mercer, a major global provider of human resource and specialty consulting services; and Putnam Investments, one of the largest investment management companies in the United States. Approximately 60,000 employees provide analysis, advice, and transactional capabilities to clients in over 100 countries. Its stock (ticker symbol: MMC) is listed on the New York, Chicago, Pacific, and London stock exchanges. MMC's website address is www.mmc.com.