William F. Ziebell - 15 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
15 Mar 2026
Net transactions value
$0
Form type
4
Filing time
18 Mar 2026, 20:43:01 UTC
Previous filing
02 Apr 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ziebell William F VICE PRESIDENT 2850 GOLF ROAD, ROLLING MEADOWS /s/ Monica Norzagaray, by power of attorney 18 Mar 2026 0001695709

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AJG Common Stock (restricted) Award +6,930 $0.000000* 6,930 15 Mar 2026 Direct F1, F2
transaction AJG Common Stock (restricted) Options Exercise -6,930 -100% $0.000000* 0 15 Mar 2026 Direct
transaction AJG Common Stock Options Exercise +6,930 +16% $0.000000* 51,006 15 Mar 2026 Direct
transaction AJG Common Stock Tax liability -2,321 -4.6% $207.93* 48,685 15 Mar 2026 Direct
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 Phantom Stock 68,213 15 Mar 2026 Common Stock 68,213 Direct F3, F4
holding AJG Non-qualified Stock Option 23,510 15 Mar 2026 Common Stock 23,510 $86.17 Direct F5
holding AJG Non-qualified Stock Option 22,210 15 Mar 2026 Common Stock 22,210 $127.90 Direct F5
holding AJG Non-qualified Stock Option 11,100 15 Mar 2026 Common Stock 11,100 $158.56 Direct F5
holding AJG Non-qualified Stock Option 9,917 15 Mar 2026 Common Stock 9,917 $337.74 Direct F5, F6
holding AJG Non-qualified Stock Option 9,712 15 Mar 2026 Common Stock 9,712 $243.54 Direct F7
holding AJG Non-qualified Stock Option 9,240 15 Mar 2026 Common Stock 9,240 $177.09 Direct F8
holding AJG Notional Stock Units 6,034 15 Mar 2026 Common Stock 6,034 Direct F9, F10
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Filed one day late due to a technical filing issue.
F2 Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.
F3 Each share of phantom stock represents a right to receive one share of Gallagher common stock.
F4 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.
F5 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F6 Closing price of Gallagher common stock on February 28, 2025.
F7 One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
F8 One-third of this stock option becomes exercisable 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 The notional stock units become payable following the reporting person's separation from service with Gallagher.

Remarks:

Ex-24: Power of Attorney.