UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________


FORM			8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


Date of report (Date of earliest event reported)			October 16, 2025


Marsh & McLennan Companies, Inc.
(Exact Name of Registrant as Specified in its Charter)


Delaware	1-5998	36-2668272
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

1166 Avenue of the Americas,

New York,

10036

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code

(212)

345-5000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


			☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


			☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


			☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


			☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading symbol(s)

Name of exchange on which registered

Common Stock, par value $1.00 per share

MMC

New York Stock Exchange

NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).


			Emerging growth company			☐
			If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.			☐

Item 2.02 Results of Operations and Financial Condition

On October 16, 2025, Marsh & McLennan Companies, Inc. issued a press release reporting financial results for the third quarter ended September 30, 2025, and announcing that a conference call to discuss such results will be held at 8:00 a.m. Eastern time on October 16, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. For purposes of Section 18 of the Securities Exchange Act of 1934, the press release is deemed furnished not filed.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

99.1 Press release issued by Marsh & McLennan Companies, Inc. on October 16, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


			MARSH & McLENNAN COMPANIES, INC.

			By:			/s/ Connor Kuratek
			Name:			Connor Kuratek
			Title:			Deputy General Counsel & Corporate Secretary

Date: October 16, 2025

EXHIBIT INDEX

Exhibit No. Exhibit


99.1			Press release issued by Marsh & McLennan Companies, Inc. on October 16, 2025

MARSH & MCLENNAN COMPANIES, INC. 8-K