MMC SVP and General Counsel granted 5,963 RSUs

Brennan Katherine reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Brennan Katherine reported acquisition or exercise transactions in this Form 4 filing.

MARSH & MCLENNAN COMPANIES, INC. reported that SVP and General Counsel Katherine Brennan received a grant of 5,963 Restricted Stock Units. Each unit is convertible into one share of Marsh & McLennan common stock on a 1-for-1 basis.

The RSUs vest in three equal annual installments on May 15, 2027, May 15, 2028, and May 15, 2029, tying the award to multi-year service and performance with the company.

Insider Trade Summary

Grant/Award: 5,963 shares

Grant/Award 1 txn

Insider Brennan Katherine

Role SVP and General Counsel

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	5,963	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 5,963 contracts (Direct)

Footnotes (3)

1. F1. The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.
2. F2. These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.
3. F3. Not Applicable

Key Figures

RSUs granted: 5,963 units Conversion ratio: 1-for-1 First vesting date: May 15, 2027 +2 more

5 metrics

RSUs granted 5,963 units Restricted Stock Units granted to SVP and General Counsel

Conversion ratio 1-for-1 Each RSU converts into one share of common stock

First vesting date May 15, 2027 First of three equal annual RSU vesting installments

Second vesting date May 15, 2028 Second of three equal annual RSU vesting installments

Third vesting date May 15, 2029 Final RSU vesting installment

Key Terms

Restricted Stock Units, 1-for-1 basis, vest, Grant, award, or other acquisition

4 terms

Restricted Stock Units financial

"reported that SVP and General Counsel Katherine Brennan received a grant of 5,963 Restricted Stock Units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

1-for-1 basis financial

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

vest financial

"These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MMC report for Katherine Brennan on this Form 4?

MMC reported that SVP and General Counsel Katherine Brennan received a grant of 5,963 Restricted Stock Units. These RSUs represent stock-based compensation and are not an open-market purchase or sale of Marsh & McLennan common shares.

How many Marsh & McLennan RSUs were granted to Katherine Brennan?

Katherine Brennan was granted 5,963 Restricted Stock Units. Each unit is tied to Marsh & McLennan common stock and will convert into common shares as they vest over time, subject to the disclosed vesting schedule.

What is the conversion ratio for Katherine Brennan’s MMC Restricted Stock Units?

Each Restricted Stock Unit converts into Marsh & McLennan common stock on a 1-for-1 basis. This means every RSU, once vested and settled, becomes one share of MMC common stock for the reporting person.

When do Katherine Brennan’s MMC Restricted Stock Units vest?

The RSUs vest in three equal annual installments on May 15, 2027, May 15, 2028, and May 15, 2029. This staggered vesting schedule is designed to align the award with ongoing service over several years.

Is Katherine Brennan’s MMC Form 4 transaction a stock sale or purchase?

The Form 4 reports a grant of Restricted Stock Units, coded as a grant or award acquisition. It is not an open-market stock purchase or sale but part of her equity-based compensation from Marsh & McLennan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/01/2026 - 04:01 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Brennan Katherine

(Last) (First) (Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK NEW YORK 10036

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	SVP and General Counsel

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/01/2026

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

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

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

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

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	(1)	05/01/2026		A(2)		5,963		(3)	(3)	Common Stock	5,963	$0	5,963	D

Explanation of Responses:

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

2. These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

3. Not Applicable

	/s/ Tessa Patti, Attorney-in-fact	05/01/2026
	** 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).
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 4: SEC 1474 (03-26)