Thomas Joseph Gallagher - 15 Mar 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
15 Mar 2026
Net transactions value
$0
Form type
4
Filing time
17 Mar 2026, 21:35:01 UTC
Previous 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 17 Mar 2026 0001589933

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AJG Common Stock (restricted) Award +9,560 $0.000000* 9,560 15 Mar 2026 Direct F1
transaction AJG Common Stock (restricted) Options Exercise -9,560 -100% $0.000000* 0 15 Mar 2026 Direct
transaction AJG Common Stock Options Exercise +9,560 +3% $0.000000* 328,251 15 Mar 2026 Direct
transaction AJG Common Stock Tax liability -4,068 -1.2% $207.93* 324,183 15 Mar 2026 Direct
holding AJG Common Stock 62,295 15 Mar 2026 By grantor retained annuity trust
holding AJG Common Stock 96,709 15 Mar 2026 By Irrevocable Trust
holding AJG Common Stock 32,428 15 Mar 2026 By wife
holding AJG Common Stock 119,175 15 Mar 2026 By wife as trustee F2, F3
holding AJG Common Stock 491 15 Mar 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
holding AJG Non-qualified Stock Option 32,895 15 Mar 2026 Common Stock 32,895 $127.90 Direct F4
holding AJG Non-qualified Stock Option 31,340 15 Mar 2026 Common Stock 31,340 $86.17 Direct F4
holding AJG Non-qualified Stock Option 22,219 15 Mar 2026 Common Stock 22,219 $228.20 Direct F5
holding AJG Phantom Stock 20,232 15 Mar 2026 Common Stock 20,232 Direct F6, F7
holding AJG Non-qualified Stock Option 15,310 15 Mar 2026 Common Stock 15,310 $158.56 Direct F4
holding AJG Non-qualified Stock Option 15,070 15 Mar 2026 Common Stock 15,070 $243.54 Direct F8
holding AJG Non-qualified Stock Option 14,876 15 Mar 2026 Common Stock 14,876 $337.74 Direct F4, F9
holding AJG Non-qualified Stock Option 12,744 15 Mar 2026 Common Stock 12,744 $177.09 Direct F10
holding AJG Notional Stock Units 11,446 15 Mar 2026 Common Stock 11,446 $0.000000 Direct F11, F12
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.
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 Each share of phantom stock represents a right to receive one share of Gallagher common stock.
F7 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.
F8 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F9 Closing price of Gallagher common stock on February 28, 2025.
F10 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F11 Each notional stock unit represents a right to receive one share of Gallagher common stock.
F12 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.