MMC (NYSE: MMC) officer reports RSU vesting and tax share withholding

Rhea-AI Filing Summary

Marsh & McLennan Companies Vice President and Controller Stacy Mills had 2,723 restricted stock units vest and convert into common shares on a 1-for-1 basis. Of these, 1,277 shares were withheld by the company at $186.74 per share to cover taxes. Mills now directly holds 4,151.098 common shares and 2,916 restricted stock units.

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^*

Mills Stacy

(Last) (First) (Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK

(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)
	Vice President and Controller

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2026

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	02/28/2026		M(1)		2,723	A	$0	5,428.098	D
Common Stock	02/28/2026		F(1)		1,277	D	$186.74	4,151.098	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)	02/28/2026		M(1)			2,723	(3)	(3)	Common Stock	2,723	$0	2,916	D

Explanation of Responses:

1. Vesting and distribution to reporting person of 2,723 shares underlying restricted stock units of which 1,277 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 2,723 shares underlying restricted stock units relate to 508 restricted stock units that were granted on February 23, 2023, 457 restricted stock units that were granted on February 22, 2024, 416 restricted stock units that were granted on February 18, 2025 and 1,342 restricted stock units relating to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025.

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	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What did MMC insider Stacy Mills report in this Form 4 transaction?

Stacy Mills reported the vesting and conversion of 2,723 restricted stock units into common shares. A portion of these shares was withheld by Marsh & McLennan Companies to satisfy tax obligations associated with the vesting event.

How many Marsh & McLennan (MMC) RSUs vested for Stacy Mills?

Stacy Mills had 2,723 restricted stock units vest and convert into common stock. These RSUs came from multiple prior grants in 2023, 2024, and 2025, including both time-based and performance-based awards for the 2023-2025 performance period.

How many MMC shares were withheld for taxes in Stacy Mills’ Form 4?

Of the 2,723 vested shares, 1,277 common shares were withheld by Marsh & McLennan Companies to cover applicable taxes. The withholding price was $186.74 per share, reflecting a tax-withholding disposition rather than an open-market sale.

What is Stacy Mills’ MMC share ownership after these Form 4 transactions?

After the reported transactions, Stacy Mills directly holds 4,151.098 shares of Marsh & McLennan common stock. In addition, Mills directly holds 2,916 restricted stock units that can convert into common shares on a 1-for-1 basis under the company’s equity plans.

What types of equity awards were involved in Stacy Mills’ MMC Form 4?

The Form 4 involves restricted stock units and performance stock units that convert 1-for-1 into common stock. The 2,723 vested units came from RSU grants in 2023, 2024, 2025 and performance stock units granted in 2023 for the 2023-2025 period.