Marsh McLennan (NYSE:MMC), a global leader in risk, strategy and people, announced today that it will be changing its New York Stock Exchange (NYSE) ticker symbol from "MMC" to "MRSH" in connection with the Company's upcoming brand change to Marsh. Trading under the new brand name and stock ticker symbol will take effect on January 14, 2026.

There is no action required by the Company's shareholders with respect to the ticker symbol change. The Company's common stock will continue to be listed on the NYSE, and its legal name and CUSIP will remain unchanged.

Additionally, the Company will announce fourth quarter financial results via news release on Thursday, January 29, 2026, before the market opens. The news release will be available on the Company's website.

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

The live audio webcast will be accessible on the Company's website, and a replay will be available approximately two hours after the event. The webcast is listen-only. Those interested in participating in the question-and-answer session may register here to receive the dial-in numbers and unique PIN to access the call.

About Marsh

Marsh (NYSE:MMC) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of over $24 billion and more than 90,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit marshmclennan.com, or follow us on LinkedIn and X.

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Media contact:

Erick Gustafson

+1 202 263 7788

Erick.Gustafson@mmc.com

Investor contact:

Jay Gelb

+1 212 345 5411

Jay.Gelb@mmc.com

Marsh McLennan to Change Its NYSE Symbol to "MRSH" on January 14; Hosts Fourth Quarter Earnings Investor Call on January 29