Marsh & McLennan (MMC) leader vests 1,228 RSUs, 627 shares withheld

Rhea-AI Filing Summary

Marsh & McLennan Companies executive Patrick Tomlinson, President and CEO of Mercer, reported the vesting and conversion of restricted stock units into common stock. On March 15, 2026, 1,228 RSUs converted into 1,228 shares of common stock on a 1-for-1 basis. Of these, 627 shares were withheld by the company at $172.15 per share to cover applicable taxes, leaving Tomlinson with additional net shares and 4,256 common shares held directly after the transactions. No remaining derivative positions are shown in this filing, indicating a routine compensation-related vesting with tax withholding rather than an open-market trade.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tomlinson Patrick

(Last) (First) (Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK NY 10036

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MARSH & MCLENNAN COMPANIES, INC. [ MRSH ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO, Mercer

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2026

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

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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/15/2026		M(1)		1,228	A	$0	4,883	D
Common Stock	03/15/2026		F(1)		627	D	$172.15	4,256	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(2)	03/15/2026		M(1)			1,228	(3)	(3)	Common Stock	1,228	$0	4,854	D

Explanation of Responses:

1. Vesting and distribution to reporting person of 1,228 shares underlying restricted stock units of which 627 shares were withheld by Marsh & McLennan Companies to cover applicable taxes. These 1,228 shares underlying restricted stock units were granted on March 1, 2023.

2. The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

3. Not Applicable.

	/s/ Tessa Patti, Attorney-in-fact	03/17/2026
	** 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 4 (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).
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FAQ

What insider transaction did Patrick Tomlinson report for Marsh & McLennan (MMC)?

Patrick Tomlinson reported a vesting of restricted stock units into common shares. On March 15, 2026, 1,228 RSUs converted into 1,228 shares of Marsh & McLennan common stock as part of his compensation, with a portion withheld to cover taxes.

How many Marsh & McLennan (MMC) RSUs vested for Patrick Tomlinson?

A total of 1,228 restricted stock units vested and converted into 1,228 shares of Marsh & McLennan common stock. These RSUs were originally granted on March 1, 2023 and converted on a 1-for-1 basis into common shares upon vesting.

How many MMC shares were withheld for taxes in Patrick Tomlinson’s Form 4?

The company withheld 627 shares of Marsh & McLennan common stock to cover applicable taxes. These shares were valued at $172.15 per share for tax purposes, leaving Tomlinson with the remaining vested shares as part of his equity compensation.

What is Patrick Tomlinson’s direct MMC common stock holding after this Form 4?

After the reported transactions, Patrick Tomlinson directly holds 4,256 shares of Marsh & McLennan common stock. This figure reflects the vesting of 1,228 RSUs and the withholding of 627 shares for tax obligations on March 15, 2026.

Were Patrick Tomlinson’s MMC transactions open-market buys or sells?

The transactions were not open-market buys or sells. They involved the exercise and conversion of restricted stock units into common stock, with 627 shares withheld by Marsh & McLennan to satisfy tax liabilities, reflecting routine compensation and tax treatment.