Director Peter Harrison files initial Form 3 at Marsh & McLennan (NYSE: MMC)

Rhea-AI Filing Summary

MARSH & MCLENNAN COMPANIES, INC. filed an initial insider ownership report for director Peter Harrison on Form 3. The filing lists Harrison as a director and does not report any share purchases, sales, or other equity transactions, reflecting a purely administrative disclosure of his status.

SEC 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^*

Harrison Peter

(Last) (First) (Middle)

1166 AVENUE OF THE AMERICAS

(Street)

NEW YORK NY 10036

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/25/2026

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

5. 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 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)

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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/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.
* 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.
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FAQ

What does the Peter Harrison Form 3 filing mean for MMC?

The Form 3 for Peter Harrison at MMC is an initial insider ownership report. It identifies him as a director and provides a baseline disclosure of his equity position, without listing any share purchases, sales, or other transactions in the reported data.

Did Peter Harrison buy or sell Marsh & McLennan (MMC) shares in this Form 3?

The Form 3 for Peter Harrison does not show any share purchases or sales. The transaction summary reports zero buy, sell, acquire, or dispose transactions, indicating this filing serves only as an initial ownership disclosure for a company director.

What insider role does Peter Harrison have at Marsh & McLennan (MMC)?

Peter Harrison is identified as a director of Marsh & McLennan Companies, Inc. in the Form 3. He is not reported as an officer or ten percent owner, so the filing focuses on his status as a board member subject to insider reporting rules.

Does the Harrison Form 3 show any beneficial ownership changes at MMC?

The Harrison Form 3 does not show any changes in beneficial ownership. The transaction counts for buys, sells, acquisitions, and dispositions are all zero, meaning there were no reported equity movements tied to this director in the disclosed period.

Why is a Form 3 filed for a Marsh & McLennan (MMC) director?

A Form 3 is filed to establish an insider’s initial ownership position in MMC. For Peter Harrison, it records his status as a director and sets a reporting baseline, even though the summarized data show no share transactions or holdings changes in this filing.