Michael Robert Pesch - 01 Jul 2026 Form 4 Insider Report for Arthur J. Gallagher & Co. (AJG)

Reporting relationship: Vice President
Issuer ticker: AJG
Reported as of: 01 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Jul 2026, 20:12:26 UTC
Prior SEC filing: 18 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Monica Norzagaray, by power of attorney

Key filing fact

Michael Robert Pesch filed Form 4 for Arthur J. Gallagher & Co. (AJG) on 06 Jul 2026.

Key facts

This page summarizes Michael Robert Pesch's Form 4 filing for Arthur J. Gallagher & Co. (AJG).
2 reported transactions and 7 derivative rows are listed below.
Accepted by SEC: 06 Jul 2026, 20:12.

Change

Previous filing in this sequence was filed on 18 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002022545 Primary reporting owner

Pesch Michael Robert

Relationship: Vice President
Address: 2850 GOLF ROAD, ROLLING MEADOWS
Signature: /s/ Monica Norzagaray, by power of attorney
Signature date: 06 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AJG transaction

Common Stock

Options Exercise

Transaction value
Shares: +356
Change %: +0.8%
Price: $229.57^*
Shares after: 44,833
Date: 01 Jul 2026
Ownership: Direct

AJG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 59
Date: 01 Jul 2026
Ownership: By Child

AJG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 12,505
Date: 01 Jul 2026
Ownership: By Spouse's Trust
Footnotes: F1

AJG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 491
Date: 01 Jul 2026
Ownership: Gallagher 401(k) plan account

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AJG transaction Derivative

Notional Stock Units

Options Exercise

Transaction value
Shares: -356
Change %: -5.5%
Price: $0.000000^*
Shares after: 6,135
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 356
Exercise price: $0.000000
Footnotes: F2, F3, F4

AJG holding Derivative

Phantom Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 49,546
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 49,546
Exercise price
Footnotes: F5, F6

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 13,167
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 13,167
Exercise price: $228.20
Footnotes: F7

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 7,520
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,520
Exercise price: $86.17
Footnotes: F8, F9

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 7,255
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,255
Exercise price: $127.90
Footnotes: F9, F10

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,900
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,900
Exercise price: $158.56
Footnotes: F9, F11

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,823
Date: 01 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,823
Exercise price: $177.09
Footnotes: F9, F12

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 12 footnotes

Footnote F1

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

Footnote F2

Each notional stock unit represents a right to receive one share of Gallagher common stock.

Footnote F3

Portions of these notional stock units are payable to the reporting person in shares of common stock in July of 2026, 2027 and 2028 and following the reporting person's separation from service.

Footnote F4

Portions of these notional stock units are payable to the reporting person in shares of common stock in July of 2026, 2027 and 2028 and following the reporting person's separation from service.

Footnote F5

Each share of phantom stock represents a right to receive one share of Gallagher common stock.

Footnote F6

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.

Footnote F7

One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Footnote F8

Grant date of 3/12/2020.

Footnote F9

One-third of this stock option becomes exercisable on each of the 3rd, 4th, and 5th anniversaries of the grant date.

Footnote F10

Grant date of 3/16/2021.

Footnote F11

Grant date of 3/15/2022.

Footnote F12

Grant date of 3/15/2023.

SEC remarks

This report discloses the distribution of notional stock units (representing compensation previously deferred by the reporting person in the Arthur J. Gallagher & Co. Supplemental Savings and Thrift Plan) in the form of Gallagher common stock. The timing of this distribution in July 2026 is in accordance with the terms of the Supplemental Savings and Thrift Plan and the reporting person's election at the time of deferral.