MMC TO HOLD INVESTOR CALL ON FEBRUARY 14 TO DISCUSS FOURTH QUARTER AND YEAR-END 2005 RESULTS

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NEW YORK, NEW YORK, January 31, 2006 - Marsh & McLennan Companies, Inc. (MMC) plans to announce fourth quarter and year-end 2005 results on Tuesday, February 14, 2006 in a news release to be issued before the market opens. The release will also be available on MMC's website at www.mmc.com.

Michael G. Cherkasky, president and chief executive officer of MMC, and Sandra S. Wijnberg, senior vice president and chief financial officer, will lead a discussion with investors on financial results, including a question and answer period, at 10:00 a.m. Eastern Standard Time on February 14.

To participate in the teleconference, please dial (888) 208-1812. Callers from outside the United States should dial (719) 457-2654. The access code for both numbers is 4446190. The audio webcast (which will be listen-only) may be accessed at www.mmc.com. A replay of the webcast will be available beginning approximately two hours after the event at the same web address.

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 59,000 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.