Marsh McLennan (NYSE: MMC) (the “Company”) announced today that it has priced $600,000,000 aggregate principal amount of its 5.400% Senior Notes due 2033 (the “2033 Notes”) and $1,000,000,000 aggregate principal amount of its 5.700% Senior Notes due 2053 (the “2053 Notes” and, together with the 2033 Notes, the “Notes”). The Company intends to use the net proceeds from the Notes offering for general corporate purposes. The closing of the Notes offering is expected to occur on September 11, 2023, subject to the satisfaction of certain customary closing conditions.

BofA Securities, Inc., Citigroup Global Markets Inc. and J.P. Morgan Securities LLC are acting as joint book-running managers for the 2033 Notes, and BofA Securities, Inc., Citigroup Global Markets Inc. and Deutsche Bank Securities Inc. are acting as joint book-running managers for the 2053 Notes.

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 the SEC website at www.sec.gov. Alternatively, copies may be obtained from any of the underwriters at (i) BofA Securities, Inc., NC1-022-02-25, 201 North Tryon Street, Charlotte, NC 28255, Attn: Prospectus Department or by email at dg.prospectus_requests@bofa.com or by telephone at 1-800-294-1322; (ii) Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717 or by email at prospectus@citi.com or by telephone at 1-800-831-9146; (iii) Deutsche Bank Securities Inc., Attn: Debt Capital Market Syndicate, 1 Columbus Circle, New York, New York 10019, telephone: 1-800-503-4611 or (iv) J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, Attn: Prospectus Department, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone: 1-866-803-9204.

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

Marsh McLennan (NYSE: MMC) is the world’s leading professional services firm in the areas of risk, strategy and people. The Company’s more than 85,000 colleagues advise clients in 130 countries. With annual revenue of over $20 billion, Marsh McLennan helps clients navigate an increasingly dynamic and complex environment through four market-leading businesses. Marsh provides data-driven risk advisory services and insurance solutions to commercial and consumer clients. 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 well being 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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