Christopher E. Mead - 23 Dec 2025 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
23 Dec 2025
Net transactions value
-$714,080
Form type
4
Filing time
29 Dec 2025, 20:59:18 UTC
Previous filing
25 Nov 2025
Next 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 29 Dec 2025 0001737644

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AJG Common Stock Options Exercise $318,360 +4,000 +23% $79.59 21,327 23 Dec 2025 Direct
transaction AJG Common Stock Sale $1,032,440 -4,000 -19% $258.11 17,327 23 Dec 2025 Direct F1
transaction AJG Common Stock Gift $0 -388 -2.2% $0.000000 16,939 23 Dec 2025 Direct F2
holding AJG Common Stock 419 23 Dec 2025 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 -4,000 -50% $0.000000 4,000 23 Dec 2025 Common Stock 4,000 $79.59 Direct F5
holding AJG Phantom Stock 20,126 23 Dec 2025 Common Stock 20,126 Direct F3, F4
holding AJG Non-qualified Stock Option 11,090 23 Dec 2025 Common Stock 11,090 $86.17 Direct F5
holding AJG Non-qualified Stock Option 11,725 23 Dec 2025 Common Stock 11,725 $127.90 Direct F5
holding AJG Non-qualified Stock Option 8,420 23 Dec 2025 Common Stock 8,420 $158.56 Direct F5
holding AJG Non-qualified Stock Option 7,009 23 Dec 2025 Common Stock 7,009 $177.09 Direct F6
holding AJG Non-qualified Stock Option 7,368 23 Dec 2025 Common Stock 7,368 $243.54 Direct F7
holding AJG Non-qualified Stock Option 8,264 23 Dec 2025 Common Stock 8,264 $337.74 Direct F5, F8
holding AJG Notional Stock Units 1,585 23 Dec 2025 Common Stock 1,585 Direct F9, F10
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The price reported is an average weighted price. The shares were sold in multiple transactions on 12/23/2025 at prices ranging from $258.000 to $258.600. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes to this Form 4.
F2 In the past, Common Stock and Common Stock (Restricted) were reported as two separate line items. In the future, they will be reported as a combined total as is stated on this Form.
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 One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
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 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:

Exhibit List: Ex-24: Power of Attorney.