InsiderTrades

Form 4 for AJG Arthur J. Gallagher & Co.

Accepted 2026-03-17 00:00:00 ET · period of report 2026-03-13 · accession 0000354190-26-000087 · 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
DM 2026-03-17 2026-03-13+ AJG HOWELL DOUGLAS K VP, CFO F - Tax $207.93 -12.5K 101.5K -11% -$2.60M
DM 2026-03-17 2026-03-13+ AJG HOWELL DOUGLAS K VP, CFO M - OptEx $34.78 +14.1K 110.6K +15% +$490.4K
D 2026-03-17 2026-03-15 AJG HOWELL DOUGLAS K VP, CFO A - Grant $0.00 +9,082 9,082 New $0
D 2026-03-17 2026-03-13 AJG HOWELL DOUGLAS K VP, CFO M - OptEx $0.00 -14.1K 0 -100% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-03-15 F D 3,865 $207.93 106,709.76 D — —
2 Common Common Stock 2026-03-13 M A 14,100 $79.59 110,130.76 D — —
3 Common Common Stock 2026-03-13 F D 8,638 $207.93 101,492.76 D — —
4 Common Common Stock (restricted) 2026-03-15 A A 9,082 $0.00 9,082 D — — (F1) Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.
5 Common Common Stock (restricted) 2026-03-15 M D 9,082 $0.00 0 D — —
6 Common Common Stock 2026-03-15 M A 9,082 $0.00 110,574.76 D — —
7 Derivative Non-qualified Stock Option 2026-03-13 M D 14,100 $0.00 0 D $79.59 · — to 2026-03-14 14,100 Common Stock (F3) Expiring stock options auto-exercised under the terms of the Long-Term Incentive Plan. (F4) One-third of this stock option becomes exerciseable on each of the 3rd, 4th, and 5th anniversaries of the grant date.