Susan E. Pietrucha - 15 Mar 2026 Form 4 Insider Report for Arthur J. Gallagher & Co. (AJG)

Role
Chief Human Resources Officer
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, 21:56:46 UTC
Previous filing
06 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Pietrucha Susan E Chief Human Resources Officer 2850 GOLF ROAD, ROLLING MEADOWS /s/ Monica Norzagaray, by power of attorney 17 Mar 2026 0001386997

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AJG Common Stock (restricted) Award +6,612 $0.000000* 6,612 15 Mar 2026 Direct F1
transaction AJG Common Stock (restricted) Options Exercise -6,612 -100% $0.000000* 0 15 Mar 2026 Direct
transaction AJG Common Stock Options Exercise +6,612 +55% $0.000000* 18,583 15 Mar 2026 Direct
transaction AJG Common Stock Tax liability -2,186 -12% $207.93* 16,397 15 Mar 2026 Direct
holding AJG Common Stock 367 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 Phantom Stock 100,638 15 Mar 2026 Common Stock 100,638 Direct F2, F3
holding AJG Non-qualified Stock Option 21,210 15 Mar 2026 Common Stock 21,210 $127.90 Direct F4
holding AJG Notional Stock Units 15,324 15 Mar 2026 Common Stock 15,324 $0.000000 Direct F5, F6
holding AJG Non-qualified Stock Option 15,020 15 Mar 2026 Common Stock 15,020 $86.17 Direct F4
holding AJG Non-qualified Stock Option 14,977 15 Mar 2026 Common Stock 14,977 $228.20 Direct F7
holding AJG Non-qualified Stock Option 10,028 15 Mar 2026 Common Stock 10,028 $337.74 Direct F4, F8
holding AJG Non-qualified Stock Option 9,875 15 Mar 2026 Common Stock 9,875 $158.56 Direct F4
holding AJG Non-qualified Stock Option 9,210 15 Mar 2026 Common Stock 9,210 $243.54 Direct F9
holding AJG Non-qualified Stock Option 8,815 15 Mar 2026 Common Stock 8,815 $177.09 Direct F10
* 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 Each share of phantom stock represents a right to receive one share of Gallagher common stock.
F3 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.
F4 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F5 Each notional stock unit represents a right to receive one share of Gallagher common stock.
F6 The notional stock units become payable following the reporting person's separation from service with Gallagher.
F7 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F8 Closing price of Gallagher common stock on February 28, 2025.
F9 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F10 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.