MMC to Hold Investor Call on August 6 to Discus...

Marsh & McLennan
                  

Marsh & McLennan Companies, Inc. (MMC) plans to announce second quarter 2008
results on Wednesday, August 6, 2008 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.

Brian Duperreault, president and chief executive officer of MMC, and Matthew B.
Bartley, executive vice president and chief financial officer, will lead a
discussion with investors on financial results at 8:30 a.m. Eastern Time on
August 6. The discussion will include a question-and-answer period.

To participate in the teleconference, please dial 877 852 6583. Callers from
outside the United States should dial 719 325 4824. The access code for both
numbers is 4956552. The live audio webcast may be accessed at www.mmc.com. A
replay of the webcast will be available approximately two hours after the event
at the same web address.

MMC is a global professional services firm providing advice and solutions in the
areas of risk, strategy and human capital. It is the parent company of a number
of the world's leading risk experts and specialty consultants, including Marsh,
the insurance broker and risk advisor; Guy Carpenter, the risk and reinsurance
specialist; Mercer, the provider of HR and related financial advice and
services; Oliver Wyman, the management consultancy; and Kroll, the risk
consulting firm. With more than 55,000 employees worldwide and annual revenue
exceeding $11 billion, MMC provides analysis, advice and transactional
capabilities to clients in more than 100 countries. Its stock (ticker symbol:
MMC) is listed on the New York, Chicago, and London stock exchanges. MMC's
website address is www.mmc.com.

Contact: MMC
Media:
Christine Walton, 212-345-0675
[e-mail]
or
Investors:
Mike Bischoff, 212-345-5470
[e-mail]