Marsh & McLennan Companies, Inc. 1166 Avenue of the Americas

NEWS RELEASE

MEDIA CONTACT:

Erick Gustafson Marsh & McLennan +1 202 263 7788erick.gustafson@mmc.com

New York, New York 10036-2774 212 345 5000www.mmc.com

INVESTOR CONTACT:

Sarah DeWitt Marsh & McLennan +1 212 345 6750sarah.dewitt@mmc.com

MARSH & McLENNAN TO HOST SECOND QUARTER EARNINGS INVESTOR CALL ON

JULY 30

NEW YORK, July 2, 2020 - Marsh & McLennan Companies, Inc. (NYSE: MMC), the world's leading professional services firm in the areas of risk, strategy and people, plans to announce second quarter financial results via news release on Thursday, July 30, 2020, before the market opens. The news release will also be available onmmc.com.

Following the news release, President and CEO Dan Glaser and CFO Mark McGivney will lead a teleconference with investors at 8:30 a.m. EDT. The discussion will include a question-and-answer session.

To participate in the teleconference, please dial +1 866-437-7574. Callers from outside the United States should dial +1 409-220-9376. The access code for both numbers is 1693114. The live audio webcast will be accessible onmmc.com,and a replay will be available approximately two hours after the event.

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.

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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. For more information, visitmmc.com,follow us onLinkedIn and Twitter@mmc_global or subscribe toBRINK.

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MMC - Marsh & McLennan Companies Inc. published this content on 02 July 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 02 July 2020 14:13:02 UTC