Annual Meeting Webcast

Marsh & McLennan Co Inc
12 May 2005



News Release

Media Contacts:                                 Investor Contact:
Barbara Perlmutter   Jim Fingeroth              Mike Bischoff
MMC                  Kekst and Company          MMC
[phone]       [phone]             [phone]


                       MMC TO WEBCAST 2005 ANNUAL MEETING
                           OF SHAREHOLDERS ON MAY 19

NEW YORK, NEW YORK, May 12, 2005-Marsh & McLennan Companies, Inc. (MMC) will
webcast its 2005 annual meeting of shareholders on Thursday, May 19, 2005 at  
10:00 a.m. Eastern Daylight Time.

The live audio webcast (which will be listen-only) will include the remarks of
Michael G. Cherkasky, president and chief executive officer of MMC. The webcast
can be accessed at www.mmc.com. A replay will be available beginning
approximately two hours after the event.

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; Putnam
Investments, one of the largest investment management companies in the United
States; and Mercer, a major global provider of consulting services.
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.

                                                                 

This press release contains statements relating to future results, which are
forward-looking statements as that term is defined in the Private Securities
Litigation Reform Act of 1995. Forward-looking statements are based on available
current market and industry materials, experts' reports and opinions, and
long-term trends, as well as management's expectations concerning current and
future events impacting MMC. Forward-looking statements by their very nature
involve risks and uncertainties. Factors that may cause actual results to differ
materially from those contemplated by forward-looking statements that we make
include:

• the impact of litigation and regulatory proceedings brought by various
  state attorneys general and state insurance regulators;
• the impact of class actions, derivative actions and individual suits
  brought by policyholders and shareholders (including MMC employees)
  asserting various claims, including claims under U.S. securities laws,
  ERISA, RICO, unfair business practices and other common law or statutory
  claims;
• loss of producers or key managers;
• inability to negotiate satisfactory compensation arrangements with
  insurance carriers or clients;
• inability to reduce expenses to the extent necessary to achieve desired
  levels of profitability;
• inability to collect previously accrued MSA revenue;
• changes in the availability of, and the market conditions and the
  premiums insurance carriers charge for, insurance products;
• the impact of litigation and other regulatory matters stemming from
  market-timing issues at Putnam;
• changes in worldwide and national equity and fixed income markets;
• actual and relative investment performance of the Putnam mutual funds;
• the level of sales and redemptions of Putnam mutual fund shares;
• changes in the value of investments made in individual companies and
  investment funds; and
• changes in interest rates or the inability to access financial markets.

Forward-looking statements speak only as of the date on which they are made, and
MMC undertakes no obligation to update any forward-looking statement to reflect
events or circumstances after the date on which it is made or to reflect the
occurrence of unanticipated events.

MMC is committed to providing timely and materially accurate information to the
investing public, consistent with our legal and regulatory obligations. To that
end, MMC and its operating companies use their websites to convey meaningful
information about their businesses, including the anticipated release of
quarterly financial results and the posting of updates of assets under
management at Putnam. Monthly updates of total assets under management at Putnam
will be posted to the MMC website the first business day following the end of
each month. Putnam posts mutual fund and performance data to its website
regularly. Assets for most Putnam retail mutual funds are posted approximately
two weeks after each month-end. Mutual fund net asset value (NAV) is posted
daily. Historical performance and Lipper rankings are also provided. Investors
can link to MMC and its operating company websites through www.mmc.com.



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            The company news service from the London Stock Exchange