InsiderTrades

Form 4 for AJG Arthur J. Gallagher & Co.

Accepted 2026-03-17 00:00:00 ET · period of report 2026-03-15 · accession 0000354190-26-000085 · 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
2026-03-17 2026-03-15 AJG GALLAGHER THOMAS JOSEPH Pres A - Grant $0.00 +9,560 9,560 New $0
M 2026-03-17 2026-03-15 AJG GALLAGHER THOMAS JOSEPH Pres M - OptEx $0.00 0 328.3K New $0
2026-03-17 2026-03-15 AJG GALLAGHER THOMAS JOSEPH Pres F - Tax $207.93 -4,068 324.2K -1% -$845.9K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock (restricted) 2026-03-15 A A 9,560 $0.00 9,560 D — — (F1) Performance share units (awarded on March 15, 2023) earned and vested as of March 15, 2026.
2 Common Common Stock (restricted) 2026-03-15 M D 9,560 $0.00 0 D — —
3 Common Common Stock 2026-03-15 M A 9,560 $0.00 328,251.08 D — —
4 Common Common Stock 2026-03-15 F D 4,068 $207.93 324,183.08 D — —