Nicholas Mark Studer - 24 Feb 2026 Form 4 Insider Report for MARSH & MCLENNAN COMPANIES, INC. (MRSH)

Role: President and CEO of OWG
Signature: /s/ Tessa Patti, Attorney-in-fact
Issuer symbol: MRSH
Transactions as of: 24 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 26 Feb 2026, 16:15:29 UTC
Previous filing: 14 Mar 2025
Next filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Studer Nicholas Mark	President and CEO of OWG	1166 AVENUE OF THE AMERICAS, NEW YORK	/s/ Tessa Patti, Attorney-in-fact	26 Feb 2026	0001871327

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MRSH	Stock Options (Right to Buy)	Award	$0	+21,129		$0.000000	21,129	24 Feb 2026	Common Stock	21,129	$176.99	Direct	F1
transaction	MRSH	Restricted Stock Units	Award	$0	+8,044		$0.000000	8,044	24 Feb 2026	Common Stock	8,044		Direct	F2, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These options were granted on February 24, 2026 and vest in four equal annual installments on February 24th of 2027, 2028, 2029 and 2030.
F2	The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.
F3	These restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025. The performance factor for these performance stock units was determined on February 24, 2026.
F4	Not Applicable