Marsh & McLennan Companies Announces Pricing of $750 Million Senior Notes Offering

Marsh & McLennan Companies, Inc. (the “Company”) announced today that it has priced $750 million aggregate principal amount of its 2.250% Senior Notes due 2030 (the “Notes”). The Company intends to use the net proceeds from the Notes offering for general corporate purposes, including paying down a portion of the borrowings under its revolving credit facility. The closing of the Notes offering is expected to occur on May 7, 2020, subject to certain customary closing conditions. BofA Securities, Inc., Citigroup Global Markets Inc., Barclays Capital Inc., Deutsche Bank Securities Inc., HSBC Securities (USA) Inc. and TD Securities (USA) LLC are acting as joint book-running managers for the Notes offering.

An effective shelf registration statement related to the Notes has previously been filed with the Securities and Exchange Commission (the “SEC”). 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. Before you invest, you should read the prospectus supplement and the base prospectus for more complete information about the issuer and this offering. You may obtain these documents for free by visiting EDGAR or the SEC website at www.sec.gov; alternatively, copies may be obtained from: (i) BofA Securities, Inc., Attn: Prospectus Department, NC1-004-03-43, 200 North College Street, 3rd floor, Charlotte, NC 28255, telephone: 1-800-294-1322 or by emailing [email protected], (ii) Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, telephone: 1-800-831-9146 or by emailing [email protected], (iii) Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, telephone: 1-800-603-5847 or by emailing [email protected], (iv) Deutsche Bank Securities Inc., Attn: Prospectus Department, 60 Wall Street, New York, NY 10005, telephone: 1-800-503-4611, or by emailing [email protected], (v) HSBC Securities (USA) Inc., Attn: Transaction Management Group, 452 Fifth Avenue, New York, NY 10018, telephone: 1-866-811-8049, or (vi) TD Securities (USA) LLC, Attn: Transaction Management Group, 31 W. 52nd Street, 2nd Floor, New York, NY 10019, telephone: 1-855-495-9846.

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 (NYSE: MMC) is the world’s leading professional services firm in the areas of risk, strategy and people. The Company’s 76,000 colleagues advise clients in over 130 countries. With annual revenue of $17 billion, Marsh & McLennan helps clients navigate an increasingly dynamic and complex environment through four market-leading businesses. Marsh advises individual and commercial clients of all sizes on insurance broking and innovative risk management solutions. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and pursue emerging opportunities. Mercer delivers advice and technology-driven solutions that help organizations redefine the world of work, reshape retirement and investment outcomes, and unlock health and wellbeing for a changing workforce. Oliver Wyman serves as a critical strategic, economic and brand advisor to private sector and governmental clients.

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