[Form 4] Arthur J. Gallagher & Co. Insider Trading Activity

Rhea-AI Filing Summary

Arthur J. Gallagher & Co. President Michael Robert Pesch reported insider trading activity on June 18, 2025. Key transaction details:

• Purchased 59 shares of Common Stock at $318.37 per share through child's account
• Current beneficial ownership positions:
  • Direct ownership: 38,186.66 shares
  • Indirect ownership through spouse's trust: 12,505 shares
  • 401(k) plan account: 418.70 shares
  • Child's account: 59 shares (newly reported)

Notable disclosure: The filing indicates a reporting change where Common Stock and Restricted Common Stock will now be reported as a combined total rather than separate line items. The transaction was executed under standard trading conditions with no 10b5-1 trading plan indicated.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Pesch Michael Robert

(Last) (First) (Middle)

2850 GOLF ROAD

(Street)

ROLLING MEADOWS IL 60008

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Arthur J. Gallagher & Co. [ AJG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President

3. Date of Earliest Transaction (Month/Day/Year)
06/18/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/18/2025		P		59	A	$318.37	59	I	By Child
Common Stock								38,186.6557(1)	D
Common Stock								12,505	I	By Spouse's Trust(2)
Common Stock								418.699	I	Gallagher 401(k) plan account

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. Shares held in irrevocable trust, of which his spouse is sole Trustee.

	/s/ Monica Norzagaray, by power of attorney	06/20/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did AJG's President Michael Robert Pesch report on June 18, 2025?

Michael Robert Pesch purchased 59 shares of AJG common stock at a price of $318.37 per share on June 18, 2025. The shares were acquired indirectly and are held by his child.

How many AJG shares does Michael Pesch directly own as of this Form 4 filing?

According to the Form 4, Michael Pesch directly owns 38,186.6557 shares of AJG common stock. This represents a combined total of Common Stock and Common Stock (Restricted) which were previously reported as separate line items.

What indirect holdings of AJG stock does Michael Pesch report?

Michael Pesch reports three indirect holdings: 59 shares held by his child, 12,505 shares held in his spouse's irrevocable trust, and 418.699 shares in his Gallagher 401(k) plan account.

When was this Form 4 for AJG filed and who signed it?

The Form 4 was filed on June 28, 2025, and was signed by Monica Norzagaray (via power of attorney) on June 20, 2025.