Arthur J. Gallagher & Co.

AJG

Form 4 • Statement of Changes in Beneficial Ownership

SEC Accession Number: 0000354190-26-000034
Filing date: Mar 4, 2026
Earliest execution date: Mar 2, 2026
Reporting Owners: GALLAGHER J PATRICK JR (CEO)

Summary

Type

Sell

Net shares

-29,550

% of shares

-3.13%

Amount (USD)

$6,322,064

Insider confidence score

16.3 out of 100

Negative

  • Large discretionary sell (≥1% of shares)
  • Huge sell amount ($5M+)

Stock transactions

Transaction 1

Security

Common Stock

Action

Exercise

Date

2026-03-02

Code

M

Net shares

+44,050.0

Price per Share

$79.59

Amount (USD)

$3,505,939.50

Acquired/Disposed

Acquired

Shares Owned Before

79,854.9335

Shares Owned After

123,904.9335

Transaction 2

Security

Common Stock

Action

Sell

Date

2026-03-02

Code

S

Net shares

-27,450.0

Price per Share

$230.31

Amount (USD)

$6,322,064.40

Acquired/Disposed

Disposed

Shares Owned Before

123,904.9335

Shares Owned After

96,454.9335

Transaction 3

Security

Common Stock

Action

Grant

Date

2026-03-03

Code

G

Net shares

-1,350.0

Acquired/Disposed

Disposed

Shares Owned Before

96,454.9335

Shares Owned After

95,104.9335

Transaction 4

Security

Common Stock

Action

Grant

Date

2026-03-03

Code

G

Net shares

-1,350.0

Acquired/Disposed

Disposed

Shares Owned Before

271,525.0

Shares Owned After

270,175.0

Transaction 5

Security

Common Stock

Action

Grant

Date

2026-03-03

Code

G

Net shares

+600.0

Acquired/Disposed

Acquired

Shares Owned Before

219,355.0

Shares Owned After

219,955.0

Derivative Transactions

Transaction 1

Security

Notional Stock Units

Action

Buy

Date

2026-03-03

Code

I

Net shares

+91,769.428

Price per Share

$225.23

Amount (USD)

$20,669,228.27

Acquired/Disposed

Acquired

Shares Owned Before

61,303.526

Shares Owned After

153,072.954

Transaction 2

Security

Non-qualified Stock Option

Action

Exercise

Date

2026-03-02

Code

M

Net shares

-44,050.0

Acquired/Disposed

Disposed

Shares Owned Before

44,050.0

Shares Owned After

0.0

Filing's footnotes

1. Covers tax obligations and the exercise price relating to the exercise of expiring stock options.

2. The price reported is an average weighted price. The shares were sold in multiple transactions at prices ranging from $230.210 to $230.780. 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 range set forth in this footnote.

3. Shares held in revocable trust of which my spouse is sole Trustee and as to which I disclaim beneficial ownership.

4. Held in trust for benefit of children.

5. Shares held in trust for the benefit of my children of which I am sole Trustee.

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

7. The reporting person moved $20,669,228.36 in assets that he holds in the company's Supplemental Savings and Thrift Plan, a nonqualified deferred compensation plan, into the investment option representing Gallagher common stock, which is a discretionary transaction by the reporting person.

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

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

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

11. 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.

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

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

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

This page is for informational purposes only. While we strive for accuracy, the summary may contain inaccuracies or omissions. Please refer to the official SEC filing for authoritative information. Open the SEC filing.