Douglas K. Howell - 13 Mar 2026 Form 4 Insider Report for Arthur J. Gallagher & Co. (AJG)

Reporting relationship: VP & Chief Financial Officer
Issuer ticker: AJG
Reported as of: 13 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Mar 2026, 21:39:57 UTC
Prior SEC filing: 06 Mar 2026
Next SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Monica Norzagaray, by power of attorney

Key filing fact

Douglas K. Howell filed Form 4 for Arthur J. Gallagher & Co. (AJG) on 17 Mar 2026.

Key facts

This page summarizes Douglas K. Howell's Form 4 filing for Arthur J. Gallagher & Co. (AJG).
7 reported transactions and 11 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 21:39.

Change

Previous filing in this sequence was filed on 06 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 0001222374 Primary reporting owner

HOWELL DOUGLAS K

Relationship: VP & Chief Financial Officer
Address: 2850 GOLF ROAD, ROLLING MEADOWS
Signature: /s/ Monica Norzagaray, by power of attorney
Signature date: 17 Mar 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: +14,100
Change %: +15%
Price: $79.59^*
Shares after: 110,131
Date: 13 Mar 2026
Ownership: Direct

AJG transaction

Common Stock

Tax liability

Transaction value
Shares: -8,638
Change %: -7.8%
Price: $207.93^*
Shares after: 101,493
Date: 13 Mar 2026
Ownership: Direct

AJG transaction

Common Stock (restricted)

Award

Transaction value
Shares: +9,082
Change %
Price: $0.000000^*
Shares after: 9,082
Date: 15 Mar 2026
Ownership: Direct
Footnotes: F1

AJG transaction

Common Stock (restricted)

Options Exercise

Transaction value
Shares: -9,082
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Mar 2026
Ownership: Direct

AJG transaction

Common Stock

Options Exercise

Transaction value
Shares: +9,082
Change %: +8.9%
Price: $0.000000^*
Shares after: 110,575
Date: 15 Mar 2026
Ownership: Direct

AJG transaction

Common Stock

Tax liability

Transaction value
Shares: -3,865
Change %: -3.5%
Price: $207.93^*
Shares after: 106,710
Date: 15 Mar 2026
Ownership: Direct

AJG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,165
Date: 13 Mar 2026
Ownership: By Spouse
Footnotes: F2

AJG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 491
Date: 13 Mar 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

Non-qualified Stock Option

Options Exercise

Transaction value
Shares: -14,100
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 14,100
Exercise price: $79.59
Footnotes: F3, F4

AJG holding Derivative

Notional Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 208,342
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 208,342
Exercise price: $0.000000
Footnotes: F5, F6

AJG holding Derivative

Notional Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 192,204
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 192,204
Exercise price: $0.000000
Footnotes: F5, F7

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 31,265
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 31,265
Exercise price: $127.90
Footnotes: F4

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 20,737
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 20,737
Exercise price: $228.20
Footnotes: F8

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 17,130
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 17,130
Exercise price: $86.17
Footnotes: F4

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 14,545
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 14,545
Exercise price: $158.56
Footnotes: F4

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 13,884
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 13,884
Exercise price: $337.74
Footnotes: F4, F9

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 12,726
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,726
Exercise price: $243.54
Footnotes: F10

AJG holding Derivative

Non-qualified Stock Option

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 12,107
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,107
Exercise price: $177.09
Footnotes: F11

AJG holding Derivative

Phantom Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 6,929
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 6,929
Exercise price
Footnotes: F12, F13

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 13 footnotes

Footnote F1

Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.

Footnote F2

The reporting person has no voting or invesment power over these shares and disclaims beneficial ownership.

Footnote F3

Expiring stock options auto-exercised under the terms of the Long-Term Incentive Plan.

Footnote F4

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

Footnote F5

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

Footnote F6

The notional stock units become payable following the reporting person's separation from service with Gallagher.

Footnote F7

Portions of these notional stock units are payable to the reporting person in shares of common stock in July of 2026, 2028 and 2029 and following the reporting person's separation from service.

Footnote F8

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

Footnote F9

Closing price of Gallagher common stock on February 28, 2025.

Footnote F10

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

Footnote F11

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

Footnote F12

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

Footnote F13

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.