Form4insider filings, from the source

Company · CIK 0000354190 · SIC 6411 — Insurance Agents, Brokers & Service · NYSE

Arthur J. Gallagher & Co. · AJG

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $7.6M · 4net −$7.6M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesMar 28Apr 27May 28Jun 28Jul 28Aug 28Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 15, 2026 SForm 4 →Sep 17, 4:46 pm EDTRichard C CaryController, CAO1,000$252.86$252,85846,819−2.09%
Sep 8, 2026 GForm 4 →Sep 10, 6:45 pm EDTPatrick Murphy GallagherChief Operating Officer49,988——148,093—
Sep 8, 2026 GForm 4 →Sep 10, 6:36 pm EDTJ Patrick Gallagher Jr.CEO, Director49,988——0—
Sep 2, 2026 SForm 4 →Sep 4, 5:25 pm EDTScott R HudsonVice President12,000$264.13$3,169,59690,262−11.7%
Sep 2, 2026 MForm 4 →Sep 4, 5:25 pm EDTScott R HudsonVice President12,000$86.17$1,034,040102,262—
Sep 1, 2026 AForm 4 →Sep 2, 5:54 pm EDTChristopher C. MiskelDirector153$262.00$40,00010,826—
Aug 24, 2026 SForm 4 →Aug 26, 7:34 pm EDTWalter D. BayGeneral Counsel12,000$270.08$3,240,97271,292−14.4%
Aug 19, 2026 SForm 4 →Aug 20, 7:12 pm EDTChristopher E MeadVICE PRESIDENT3,500$257.03$899,58722,223−13.6%
Aug 19, 2026 MForm 4 →Aug 20, 7:12 pm EDTChristopher E MeadVICE PRESIDENT3,500$86.17$301,59525,723—
Aug 16, 2026 FMForm 4 →Aug 18, 7:06 pm EDTMark H. BloomVice President1,887$251.21$152,4384,417—
Aug 5, 2026 GForm 4 →Aug 7, 5:47 pm EDTPatrick Murphy GallagherChief Operating Officer23,800——53,262—
Jul 1, 2026 MForm 4 →Jul 6, 8:21 pm EDTVishal JainVICE PRESIDENT2,163$229.57$496,49068,903—
Jul 1, 2026 MForm 4 →Jul 6, 8:18 pm EDTThomas Joseph GallagherPresident352$229.57$80,796323,743—
Jul 1, 2026 MForm 4 →Jul 6, 8:12 pm EDTMichael Robert PeschVice President356$229.57$81,68144,833—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 2, 2026 MForm 4 →Sep 4, 5:25 pm EDTScott R HudsonVice President12,000——12,370—
Aug 19, 2026 MForm 4 →Aug 20, 7:12 pm EDTChristopher E MeadVICE PRESIDENT3,500——7,590—
Aug 16, 2026 MForm 4 →Aug 18, 7:06 pm EDTMark H. BloomVice President1,280——6,017—
Jul 1, 2026 MForm 4 →Jul 6, 8:21 pm EDTVishal JainVICE PRESIDENT2,163——9,726—
Jul 1, 2026 MForm 4 →Jul 6, 8:18 pm EDTThomas Joseph GallagherPresident352——13,346—
Jul 1, 2026 MForm 4 →Jul 6, 8:12 pm EDTMichael Robert PeschVice President356——6,135—
Jun 22, 2026 IForm 4 →Jun 24, 6:45 pm EDTDouglas K HowellVP & Chief Financial Officer12,954$209.08$2,708,503185,954—