InsiderTrades

Form 4 for AJG Arthur J. Gallagher & Co.

Accepted 2026-03-02 00:00:00 ET · period of report 2026-02-26 · accession 0000354190-26-000011 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
D 2026-03-02 2026-02-26 AJG GALLAGHER THOMAS JOSEPH Pres F - Tax $221.70 -17.6K 290.5K -6% -$3.89M
D 2026-03-02 2026-02-26 AJG GALLAGHER THOMAS JOSEPH Pres M - OptEx $75.59 +28.2K 318.7K +10% +$2.13M
D 2026-03-02 2026-02-26 AJG GALLAGHER THOMAS JOSEPH Pres M - OptEx $0.00 -28.2K 0 -100% $0
D 2026-03-02 2026-03-01 AJG GALLAGHER THOMAS JOSEPH Pres A - Grant $228.20 +22.2K 22.2K New +$5.07M

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-02-26 F D 17,555 $221.70 290,491.08 D — — (F1) Represents the number of shares withheld by the Company as a result of the net exercise of stock options and used to pay the exercise price and required tax withholdings.
2 Common Common Stock 2026-02-26 M A 28,200 $75.59 318,691.08 D — —
3 Derivative Non-qualified Stock Option 2026-02-26 M D 28,200 $0.00 0 D $79.59 · — to 2026-03-14 28,200 Common Stock (F4) One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.
4 Derivative Non-qualified Stock Option 2026-03-01 A A 22,219 $228.20 22,219 D $228.20 · — to 2033-03-01 22,219 Common Stock (F5) One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.