Arthur J. Gallagher (NYSE: AJG) officer plans $899,587 share sale

Rhea-AI Filing Summary

Arthur J. Gallagher & Co. (AJG) received a notice under Rule 144 that an officer, Christopher E. Mead, plans to sell 3,500 shares of common stock. The shares are to be acquired through a stock option exercise for cash and are expected to be sold on or about August 19, 2026 through Fidelity Brokerage Services LLC.

Key Figures

Planned shares to be sold: 3,500 shares Aggregate market value of planned sale: $899,587.50 Issuer common shares referenced: 256,300,000 shares +1 more

4 metrics

Planned shares to be sold 3,500 shares Common stock to be sold for the account of Christopher E. Mead under Rule 144

Aggregate market value of planned sale $899,587.50 Value associated with the 3,500 shares of Arthur J. Gallagher & Co. common stock

Issuer common shares referenced 256,300,000 shares Number of Arthur J. Gallagher & Co. common shares shown in the securities information section

Planned transaction date 08/19/2026 Date listed for both stock option exercise and anticipated sale of shares

Key Terms

Rule 144, stock option exercise, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

stock option exercise financial

"Common | 08/19/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher Mead"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What transaction is being reported for Arthur J. Gallagher & Co. (AJG)?

The filing reports a planned sale of 3,500 shares of Arthur J. Gallagher & Co. common stock under Rule 144 by officer Christopher E. Mead. The shares will be obtained via a stock option exercise for cash and then sold through Fidelity Brokerage Services LLC.

Who is selling shares of Arthur J. Gallagher & Co. (AJG) in this Form 144?

The notice covers proposed sales for the account of Christopher E. Mead, identified as an officer of Arthur J. Gallagher & Co. Fidelity Brokerage Services LLC is listed as the broker handling the planned transaction and signed as attorney-in-fact on Mead’s behalf.

How many AJG shares are planned to be sold and when?

The Form 144 indicates a planned sale of 3,500 shares of Arthur J. Gallagher & Co. common stock on or about August 19, 2026. The same date is listed both for the stock option exercise and the anticipated sale of the shares for cash.

What is the approximate market value of the AJG shares covered by this Form 144?

The filing lists an aggregate market value of $899,587.50 for the 3,500 Arthur J. Gallagher & Co. shares subject to the planned Rule 144 sale. This figure reflects the value used for disclosure in the notice, not necessarily final execution proceeds.

What are the outstanding AJG shares referenced in this Form 144 notice?

The securities information section references 256,300,000 shares of Arthur J. Gallagher & Co. common stock. This number is presented in the context of the issuer’s securities and provides scale relative to the 3,500 shares covered by the planned sale.

Which broker and market are involved in the planned AJG share sale?

The planned Rule 144 sale of 3,500 Arthur J. Gallagher & Co. shares will be handled by Fidelity Brokerage Services LLC, with the security identified as common stock listed on the NYSE. The broker’s representative signed as attorney-in-fact for Christopher E. Mead.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/19/2026 - 01:58 PM Accepted by SEC EDGAR 08/19/2026 - 01:58 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001737644
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Arthur J. Gallagher & Co.
SEC File Number	001-09761
Address of Issuer	2850 GOLF ROAD ROLLING MEADOWS ILLINOIS 60008-4050
Phone	630-773-3800
Name of Person for Whose Account the Securities are To Be Sold	Mead Christopher E
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	3500	899587.50	256300000	08/19/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/19/2026	Stock Option Exercise	Issuer			3500	08/19/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher Mead
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)