Marsh & McLennan Companies Announces Pricin...

Marsh & McLennan Companies Announces Pricing of $250 Million Senior Notes Offering

Marsh & McLennan Companies

Marsh & McLennan Companies, Inc. (the “Company”) announced today that it has priced $250 million of 2.30% senior notes due 2017 (the “Notes”) The Company intends to use the net proceeds for the repayment of its existing $250 million aggregate principal amount of 6.25% senior notes due March 2012. The closing of the Notes offering is expected to occur on March 12, 2012, subject to certain customary conditions. Barclays Capital and HSBC are acting as joint book-running managers for the offering. BofA Merrill Lynch, Citigroup, Deutsche Bank Securities, Goldman, Sachs & Co., J.P. Morgan, Morgan Stanley and Wells Fargo Securities are acting as co-managers for the offering.

An effective shelf registration statement related to the Notes has previously been filed with the Securities and Exchange Commission. The offering and sale of the Notes are being made by means of a prospectus supplement and an accompanying base prospectus related to the offering, copies of which may be obtained from: (i) Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, by phone (toll free): 1-888-603-5847 or by e-mail: [e-mail], and/or (ii) HSBC Securities (USA) Inc., by phone (toll free): 1-866-811-8049.

This press release does not constitute an offer to sell or a solicitation of an offer to buy any securities, nor does it constitute an offer, solicitation or sale in any jurisdiction in which such offer, solicitation or sale is unlawful.

ABOUT MARSH & MCLENNAN COMPANIES

MARSH & McLENNAN COMPANIES (NYSE: MMC) is a global team of professional services companies offering clients advice and solutions in the areas of risk, strategy and human capital. MARSH is a global leader in insurance broking and risk management; GUY CARPENTER is a global leader in providing risk and reinsurance intermediary services; MERCER is a global leader in human resource consulting and related services; and OLIVER WYMAN is a global leader in management consulting. Marsh & McLennan Companies’ 52,000 colleagues worldwide provide analysis, advice and transactional capabilities to clients in more than 100 countries. The Company prides itself on being a responsible corporate citizen and making a positive impact in the communities in which it operates.

Media:

Marsh & McLennan Companies

Jeremy Lehrman, [phone]

[e-mail]

or

Investors:

Marsh & McLennan Companies

Scott Douglas, [phone]

[e-mail]

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