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) ~~February~~March 2510, 2026


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

MRSH

New York Stock Exchange

NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in 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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

~~(d)~~ On ~~February~~March 2510, 2026, ~~the board of directors (the “Board”) of~~ Marsh & McLennan Companies, Inc. (the “Company”) ~~appointed~~announced ~~Peter~~that ~~Harrison~~Nick Studer, ~~age~~will ~~59,~~succeed Martin South as anPresident ~~independent~~and ~~member~~Chief Executive Officer of ~~the~~Marsh ~~Board~~Risk, effective ~~immediately~~April 1, 2026. Mr. ~~Harrison’s~~Studer ~~Board~~has ~~committee~~served ~~assignments~~as ~~have~~Chief ~~not~~Executive ~~yet~~Officer ~~been~~of ~~determined~~Oliver Wyman and Marsh Management Consulting since July 2021. ~~The~~He first joined the Company ~~expects~~in to1997 ~~disclose~~and ~~such~~has ~~assignments~~held invarious ~~its~~senior ~~definitive~~positions ~~proxy~~at ~~statement~~Oliver ~~for~~Wyman, ~~its~~including ~~2026~~Managing ~~Annual~~Partner ~~Meeting~~of the Financial Services Practice Group, Head of ~~Stockholders~~the European Finance and Risk Practice and Global Head of the Corporate and Institutional Banking practice.

AsThe aCompany ~~non-management~~also ~~director,~~announced ~~Mr.~~that ~~Harrison~~Martin South will bebecome ~~compensated~~the asSenior ~~described~~Vice inPresident ~~“Description~~and Chief Client Officer of ~~Compensation~~the ~~Arrangements~~Company, ~~for~~effective ~~Independent~~April ~~Directors”~~1, ~~which~~2026. ~~was~~Both ~~filed~~Mr. asSouth ~~Exhibit~~and 10Mr.2 Studer will continue to serve as members of the Company’s ~~Quarterly~~Executive ~~Report~~Committee onand ~~Form~~report ~~10-Q~~to ~~for~~John ~~the~~Doyle, ~~quarter~~President ~~ended~~and ~~June~~Chief ~~30,~~Executive ~~2025~~Officer of the Company.

AOn ~~copy~~March 5, 2026, the Compensation Committee of the Company'’s ~~press~~Board ~~release~~of Directors approved an amendment to the terms of Mr. South’s employment in conjunction with his new appointment. The amendment provides that Mr. South will continue to receive his current base salary. Mr. South will be eligible for an annual bonus with a target of $1,500,000 ~~dated~~commencing with the 2026 performance year (awarded in February 252027). Mr. South will also be eligible for a long-term incentive award with a target value of $1,750,000 commencing with the award to be made in 2027. In addition, beginning on April 1, 2026, ~~announcing~~for ~~the~~a ~~appointment~~period of 12 months, in the event Mr. ~~Harrison~~South’s employment is ~~attached~~involuntarily ~~hereto~~terminated by the Company without “Cause” or he terminates his employment for any reason, Mr. South will receive the severance benefits that he is entitled to under the Marsh & McLennan Companies, Inc. Senior Executive Severance Pay Plan as ~~Exhibit~~though 99he was involuntarily terminated without Cause as of April 1, 2026. Beginning on April 1, ~~and~~2027, ~~incorporated~~Mr. ~~herein~~South bywill ~~reference~~be eligible to participate in the Severance Plan on the same terms as all other eligible employees.

A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

99.1 Press release issued by Marsh & McLennan Companies, Inc. on ~~February~~March 2510, 2026

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 and Corporate Secretary

Date: ~~February~~March 2510, 2026

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