Investor Call on August 3

Marsh & McLennan Co Inc
21 July 2006


News Release

Media Contact:            Investor Contact:
Robin Liebowitz           Mike Bischoff
MMC                       MMC
212 345 3963              212 345 5470


                MMC TO HOLD INVESTOR CALL ON AUGUST 3 TO DISCUSS

                          SECOND QUARTER 2006 RESULTS

NEW YORK, NEW YORK, July 21, 2006-Marsh & McLennan Companies, Inc. (MMC) plans
to announce second quarter 2006 results on Thursday, August 3, 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 M.
Michele Burns, executive 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 Time on August 3.

To participate in the teleconference, please dial 800 240 8621. Callers from
outside the United States should dial 303 205 0033. The access code for both
numbers is 1634903. The audio webcast 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 of approximately
$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 55,000 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.




                      This information is provided by RNS
            The company news service from the London Stock Exchange