SEC FORM 3

SEC FORM 3SEC 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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1. Name and Address of Reporting Person^*

Moynihan Edward Francis

(Last)

(First)

(Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK

10036

(City)

(State)

(Zip)

UNITED STATES

(Country)

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 ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

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

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
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

Explanation of Responses:

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.

	/s/ Tessa Patti, Attorney-in-fact	04/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

SEC Form 3 filed by new insider Moynihan Edward Francis