Initial Statement of Beneficial Ownership (Form 3)

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Moynihan Edward Francis 2. Date of Event Requiring Statement (Month/Day/Year) 04/01/2026 3. Issuer Name and Ticker or Trading Symbol MARSH & MCLENNAN COMPANIES, INC. [MRSH] (Last) (First) (Middle) 1166 AVENUE OF THE AMERICAS 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO, Oliver Wyman 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) NEW YORK, NY 10036 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 9,121 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	(1)	Common Stock	8,867	(2)	D
Stock Options (Right to Buy)	(3)	02/21/2027	Common Stock	9,161	$73.2	D
Stock Options (Right to Buy)	(4)	02/20/2028	Common Stock	6,151	$83.05	D
Stock Options (Right to Buy)	(5)	02/18/2029	Common Stock	5,609	$90.79	D
Stock Options (Right to Buy)	(6)	02/18/2030	Common Stock	4,328	$118.87	D
Stock Options (Right to Buy)	(7)	02/21/2031	Common Stock	4,832	$117.53	D
Stock Options (Right to Buy)	(8)	02/22/2032	Common Stock	3,785	$151.37	D
Stock Options (Right to Buy)	(9)	02/22/2033	Common Stock	2,982	$164.15	D
Stock Options (Right to Buy)	(10)	02/21/2034	Common Stock	2,385	$200.47	D
Stock Options (Right to Buy)	(11)	02/17/2035	Common Stock	2,617	$230.29	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Moynihan Edward Francis 1166 AVENUE OF THE AMERICAS NEW YORK, NY 10036			President & CEO, Oliver Wyman

Signatures

/s/ Tessa Patti, Attorney-in-fact		04/10/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Not applicable.
(2)	The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.
(3)	These options were granted on February 22, 2017 and vested in four equal annual installments on February 22nd of 2018, 2019, 2020 and 2021.
(4)	These options were granted on February 21, 2018 and vested in four equal annual installments on February 21st of 2019, 2020, 2021 and 2022.
(5)	These options were granted on February 19, 2019 and vested in four equal annual installments on February 19th of 2020, 2021, 2022 and 2023.
(6)	These options were granted on February 19, 2020 and vested in four equal annual installments on February 19th of 2021, 2022, 2023 and 2024.
(7)	These options were granted on February 22, 2021 and vested in four equal annual installments on February 22nd of 2022, 2023, 2024 and 2025.
(8)	These options were granted on February 23, 2022 and vested in four equal annual installments on February 23rd of 2023, 2024, 2025 and 2026.
(9)	These options were granted on February 23 2023 and vested in four equal annual installments on February 23rd of 2024, 2025, 2026 and 2027.
(10)	These options were granted on February 22, 2024 and vest in four equal annual installments on February 22nd of 2025, 2026, 2027 and 2028.
(11)	These options were granted on February 18, 2025 and vest in four equal annual installments on February 18th of 2026, 2027, 2028 and 2029.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.