Thomas Joseph Gallagher - 26 Feb 2026 Form 4 Insider Report for Arthur J. Gallagher & Co. (AJG)

Role
President
Signature
/s/ Monica Norzagaray, by power of attorney
Issuer symbol
AJG
Transactions as of
26 Feb 2026
Net transactions value
+$3,310,158
Form type
4
Filing time
02 Mar 2026, 21:11:37 UTC
Previous filing
22 Aug 2025
Next filing
06 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
GALLAGHER THOMAS JOSEPH President 2850 GOLF ROAD, ROLLING MEADOWS /s/ Monica Norzagaray, by power of attorney 02 Mar 2026 0001589933

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AJG Common Stock Options Exercise $2,131,638 +28,200 +9.7% $75.59 318,691 26 Feb 2026 Direct
transaction AJG Common Stock Tax liability $3,891,856 -17,555 -5.7% $221.70 290,491 26 Feb 2026 Direct F1
holding AJG Common Stock 119,175 26 Feb 2026 By wife as trustee F2, F3
holding AJG Common Stock 96,709 26 Feb 2026 By Irrevocable Trust
holding AJG Common Stock 62,295 26 Feb 2026 By grantor retained annuity trust
holding AJG Common Stock 32,428 26 Feb 2026 By wife
holding AJG Common Stock 419 26 Feb 2026 Gallagher 401(k) plan account

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 Non-qualified Stock Option Options Exercise $0 -28,200 -100% $0.000000 0 26 Feb 2026 Common Stock 28,200 $79.59 Direct F4
transaction AJG Non-qualified Stock Option Award $5,070,376 +22,219 $228.20 22,219 01 Mar 2026 Common Stock 22,219 $228.20 Direct F5
holding AJG Non-qualified Stock Option 32,895 26 Feb 2026 Common Stock 32,895 $127.90 Direct F4
holding AJG Non-qualified Stock Option 31,340 26 Feb 2026 Common Stock 31,340 $86.17 Direct F4
holding AJG Non-qualified Stock Option 15,310 26 Feb 2026 Common Stock 15,310 $158.56 Direct F4
holding AJG Non-qualified Stock Option 15,070 26 Feb 2026 Common Stock 15,070 $243.54 Direct F6
holding AJG Non-qualified Stock Option 14,876 26 Feb 2026 Common Stock 14,876 $337.74 Direct F4, F7
holding AJG Non-qualified Stock Option 12,744 26 Feb 2026 Common Stock 12,744 $177.09 Direct F8
holding AJG Notional Stock Units 11,110 26 Feb 2026 Common Stock 11,110 $0.000000 Direct F9, F10
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the number of shares withheld by the Company as a result of the net exercise of stock options and used to pay the exercise price and required tax withholdings.
F2 The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose.
F3 These shares are held in trusts, for the benefit of the reporting person's children, of which his wife is a trustee.
F4 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F5 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F6 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F7 Closing price of Gallagher common stock on February 28, 2025.
F8 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F9 Each notional stock unit represents a right to receive one share of Gallagher common stock.
F10 Portions of these notional stock units are payable to the reporting person in shares of common stock in July of 2025 and 2026 and following the reporting person's separation from service.

Remarks:

This filing reports the net exercise of stock options scheduled to expire on March 14, 2026 and a stock option award granted on March 1, 2026. Ex-24: Power of Attorney.