Christopher E. Mead - 04 Mar 2026 Form 4 Insider Report for Arthur J. Gallagher & Co. (AJG)

Role: VICE PRESIDENT
Signature: /s/ Monica Norzagaray, by power of attorney
Issuer symbol: AJG
Transactions as of: 04 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 06 Mar 2026, 20:16:48 UTC
Previous filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mead Christopher E	VICE PRESIDENT	2850 GOLF ROAD, ROLLING MEADOWS	/s/ Monica Norzagaray, by power of attorney	06 Mar 2026	0001737644

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	AJG	Phantom Stock	Award		+1,542	+7.6%	$227.01^*	21,804	04 Mar 2026	Common Stock	1,542		Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Each share of phantom stock represents a right to receive one share of Gallagher common stock.
F2	These shares represent awards under the Age 62 Plan, a nonqualified deferred compensation plan of the Company, which have been deemed invested in Company common stock at the election of the reporting person. Participants vest in these awards when they attain age 62, or after a one-year period for participants who have attained age 61.