The Filings Report

Arthur J. Gallagher & Co. insider trading

AJGfinancial statementsForm 4 filings on EDGAR309 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at Arthur J. Gallagher & Co. bought $0 of stock in the open market, and 4 sold $8M. Officers and directors accounted for $0 of purchases and $8M of sales. The last reported transaction was an open-market sale by Cary Richard C on September 15, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through September 17, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

AJG daily priceSplit-adjusted prices in US dollars

Bought $0Sold $8MAug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $275.00 · H $277.45 · L $269.40 · C $276.07Bought $0 (0)Sold $0 (0)
$220$235$250$265$2812026-08-04: open $242.84, high $248.83, low $240.82, close $248.062026-08-05: open $249.83, high $252.29, low $247.57, close $251.032026-08-06: open $252.78, high $253.78, low $247.52, close $251.742026-08-07: open $247.96, high $252.04, low $246.29, close $248.122026-08-10: open $247.00, high $252.86, low $245.33, close $252.432026-08-11: open $248.98, high $256.20, low $247.00, close $253.512026-08-12: open $250.00, high $256.29, low $248.11, close $255.462026-08-13: open $256.35, high $257.12, low $250.00, close $253.492026-08-14: open $253.16, high $254.39, low $250.00, close $251.212026-08-17: open $248.99, high $253.57, low $246.88, close $247.972026-08-18: open $250.02, high $255.28, low $248.05, close $248.362026-08-19: open $249.44, high $260.28, low $249.11, close $257.452026-08-20: open $256.45, high $262.17, low $255.11, close $259.612026-08-21: open $259.44, high $264.21, low $257.68, close $263.812026-08-24: open $265.00, high $272.37, low $262.49, close $271.992026-08-25: open $269.84, high $272.79, low $266.96, close $268.512026-08-26: open $267.64, high $272.78, low $263.58, close $265.032026-08-27: open $260.60, high $264.08, low $259.26, close $260.152026-08-28: open $260.50, high $268.91, low $260.50, close $267.562026-08-31: open $264.13, high $267.07, low $261.06, close $262.152026-09-01: open $264.43, high $267.23, low $260.04, close $262.002026-09-02: open $263.50, high $266.21, low $261.32, close $264.462026-09-03: open $265.81, high $271.27, low $264.69, close $266.662026-09-04: open $263.33, high $266.71, low $261.97, close $262.692026-09-08: open $257.68, high $258.39, low $251.29, close $251.452026-09-09: open $250.20, high $251.34, low $243.41, close $244.282026-09-10: open $245.22, high $247.55, low $242.70, close $243.312026-09-11: open $245.95, high $246.82, low $240.32, close $240.322026-09-14: open $245.58, high $254.22, low $245.58, close $253.302026-09-15: open $251.18, high $254.59, low $247.87, close $248.042026-09-16: open $246.21, high $246.41, low $241.38, close $243.782026-09-17: open $243.18, high $244.73, low $240.08, close $241.412026-09-18: open $240.00, high $241.93, low $238.75, close $239.482026-09-21: open $239.72, high $240.71, low $236.58, close $236.612026-09-22: open $236.29, high $236.60, low $226.79, close $230.452026-09-23: open $228.70, high $231.31, low $227.91, close $229.642026-09-24: open $230.72, high $233.19, low $226.26, close $227.132026-09-25: open $226.73, high $232.23, low $225.87, close $231.102026-09-28: open $230.00, high $232.81, low $226.95, close $229.482026-09-29: open $227.32, high $229.35, low $225.11, close $227.752026-09-30: open $227.44, high $229.49, low $225.55, close $228.112026-10-01: open $229.43, high $234.13, low $229.29, close $231.822026-10-02: open $230.79, high $232.76, low $225.27, close $226.112026-10-05: open $225.00, high $227.54, low $222.83, close $227.242026-10-06: open $225.81, high $230.73, low $225.08, close $230.002026-10-07: open $228.93, high $231.67, low $226.39, close $227.102026-10-08: open $227.95, high $234.79, low $225.85, close $234.052026-10-09: open $233.74, high $235.94, low $231.50, close $232.702026-10-12: open $233.54, high $234.59, low $232.82, close $233.922026-10-13: open $234.51, high $235.85, low $232.09, close $232.902026-10-14: open $234.00, high $238.82, low $231.86, close $237.042026-10-15: open $243.59, high $252.76, low $242.44, close $250.102026-10-16: open $252.02, high $255.40, low $250.89, close $254.882026-10-19: open $252.12, high $254.16, low $249.73, close $253.012026-10-20: open $256.59, high $261.91, low $256.10, close $259.212026-10-21: open $259.81, high $259.81, low $256.91, close $258.372026-10-22: open $260.00, high $271.01, low $257.52, close $270.902026-10-23: open $269.45, high $272.80, low $267.45, close $268.042026-10-26: open $267.15, high $269.00, low $263.79, close $266.792026-10-27: open $261.94, high $266.20, low $255.75, close $259.012026-10-28: open $258.82, high $262.94, low $256.64, close $260.422026-10-29: open $262.53, high $270.53, low $262.53, close $268.202026-10-30: open $275.00, high $277.45, low $269.40, close $276.07Insider purchases / sales · USD$5M$0−$5M2026-08-19: 0 purchases ($0), 1 sales ($900K)2026-08-24: 0 purchases ($0), 1 sales ($3M)2026-09-02: 0 purchases ($0), 1 sales ($3M)2026-09-15: 0 purchases ($0), 1 sales ($253K)Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

309 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Sep 15, 2026Cary Richard CController, CAOopen-market sale1,000$252.86$253K46,819Sep 17, 2026
Sep 8, 2026Gallagher Patrick MurphyChief Operating Officergiftindirect49,988$0.00—148,093Sep 10, 2026
Sep 8, 2026Gallagher J Patrick JRCEO, Directorgiftindirect49,988$0.00—0Sep 10, 2026
Sep 2, 2026Hudson Scott RVice Presidentoption exercise12,000$86.17$1M102,262Sep 4, 2026
Sep 2, 2026Hudson Scott RVice Presidentopen-market sale12,000$264.13$3M90,262Sep 4, 2026
Sep 1, 2026Miskel Christopher C.Directoraward153$262.00$40K10,826Sep 2, 2026
Aug 24, 2026Bay Walter D.General Counselopen-market sale12,000$270.08$3M71,292Aug 26, 2026
Aug 19, 2026Mead Christopher EVICE PRESIDENToption exercise3,500$86.17$302K25,723Aug 20, 2026
Aug 19, 2026Mead Christopher EVICE PRESIDENTopen-market sale3,500$257.02$900K22,223Aug 20, 2026
Aug 16, 2026Bloom Mark H.Vice Presidentoption exercise1,280$0.00—5,023Aug 18, 2026
Aug 16, 2026Bloom Mark H.Vice Presidenttax withholding607$251.21$152K4,417Aug 18, 2026
Aug 5, 2026Gallagher Patrick MurphyChief Operating Officergiftindirect23,800$0.00—53,262Aug 7, 2026
Jul 1, 2026Jain VishalVICE PRESIDENToption exercise2,163$229.57$496K68,903Jul 6, 2026
Jul 1, 2026Gallagher Thomas JosephPresidentoption exercise352$229.57$81K323,743Jul 6, 2026
Jul 1, 2026Pesch Michael RobertVice Presidentoption exercise356$229.57$82K44,833Jul 6, 2026
Jun 2, 2026Cary Richard CController, CAOopen-market sale3,000$206.00$618K47,819Jun 2, 2026
Jun 1, 2026Johnson David SDirectoraward237$206.10$49K47,387Jun 2, 2026
Jun 1, 2026Miskel Christopher C.Directoraward194$206.10$40K10,642Jun 2, 2026
May 26, 2026Gallagher Patrick MurphyChief Operating Officergiftindirect14,698$0.00—98,105May 28, 2026
May 26, 2026Gallagher J Patrick JRCEO, Directorgift14,698$0.00—109,417May 28, 2026
May 12, 2026Caplan Deborah HDirectoraward1,110$0.00—2,650May 13, 2026
May 12, 2026Clarke Teresa HillaryDirectoraward1,110$0.00—5,567May 13, 2026
May 12, 2026Coldman David JohnDirectoraward1,110$0.00—16,344May 13, 2026
May 12, 2026Harries Richard de Winton WilkinDirectoraward1,110$0.00—2,413May 13, 2026
May 12, 2026Johnson David SDirectoraward1,110$0.00—47,150May 13, 2026
May 12, 2026Miskel Christopher C.Directoraward1,110$0.00—10,448May 13, 2026
May 12, 2026Nicoletti Ralph JDirectoraward1,110$0.00—18,414May 13, 2026
May 12, 2026Rosenthal Norman LDirectoraward1,110$0.00—43,327May 13, 2026
Mar 31, 2026Gallagher Thomas JosephPresidentoption exercise76$215.95$16K323,467Apr 2, 2026
Mar 31, 2026Gallagher Thomas JosephPresidenttax withholding76$215.95$16K323,391Apr 2, 2026
Mar 31, 2026Howell Douglas KVP & Chief Financial Officeroption exercise76$215.95$16K106,786Apr 2, 2026
Mar 31, 2026Howell Douglas KVP & Chief Financial Officertax withholding76$215.95$16K106,710Apr 2, 2026
Mar 31, 2026Hudson Scott RVice Presidentoption exercise64$215.95$14K90,326Apr 2, 2026
Mar 31, 2026Hudson Scott RVice Presidenttax withholding64$215.95$14K90,262Apr 2, 2026
Mar 31, 2026Jain VishalVICE PRESIDENToption exercise51$215.95$11K66,792Apr 2, 2026
Mar 31, 2026Jain VishalVICE PRESIDENTtax withholding51$215.95$11K66,741Apr 2, 2026
Mar 31, 2026Ziebell William FVICE PRESIDENToption exercise51$215.95$11K48,736Apr 2, 2026
Mar 31, 2026Ziebell William FVICE PRESIDENTtax withholding51$215.95$11K48,685Apr 2, 2026
Mar 31, 2026Bay Walter D.General Counseloption exercise1,415$215.95$306K83,919Apr 1, 2026
Mar 31, 2026Bay Walter D.General Counseltax withholding627$215.95$135K83,292Apr 1, 2026
Mar 31, 2026Cary Richard CController, CAOoption exercise472$215.95$102K50,958Apr 1, 2026
Mar 31, 2026Cary Richard CController, CAOtax withholding139$215.95$30K50,819Apr 1, 2026
Mar 31, 2026Gallagher J Patrick JRCEO, Directoroption exercise5,346$215.95$1M126,331Apr 1, 2026
Mar 31, 2026Gallagher J Patrick JRCEO, Directortax withholding2,369$215.95$512K123,962Apr 1, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgiftindirect176$0.00—31,988Mar 24, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgift264$0.00—323,919Mar 24, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgiftindirect264$0.00—119,439Mar 24, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgift528$0.00—323,391Mar 24, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgiftindirect264$0.00—119,703Mar 24, 2026
Mar 23, 2026Gallagher Thomas JosephPresidentgiftindirect264$0.00—32,164Mar 24, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Bay Walter D.General CounselAug 24, 2026open-market sale71,292—$7M (2)0 of 2
Gallagher J Patrick JRCEO, DirectorSep 8, 2026gift109,417—$6M (1)0 of 1
Hudson Scott RVice PresidentSep 2, 2026option exercise102,262—$4M (2)0 of 2
Mead Christopher EVICE PRESIDENTAug 19, 2026option exercise25,723—$3M (4)0 of 4
Cary Richard CController, CAOSep 15, 2026open-market sale46,819—$2M (3)0 of 3
Howell Douglas KVP & Chief Financial OfficerMar 31, 2026option exercise106,786—$1M (1)0 of 1
Pesch Michael RobertVice PresidentJul 1, 2026option exercise44,833$988K (4)——
Gallagher Patrick MurphyChief Operating OfficerSep 8, 2026gift14,072———
Gallagher Thomas JosephPresidentJul 1, 2026option exercise323,743———
Jain VishalVICE PRESIDENTJul 1, 2026option exercise68,903———
Ziebell William FVICE PRESIDENTMar 31, 2026option exercise48,736———
Pietrucha Susan EChief Human Resources OfficerMar 15, 2026award6,612———
Johnson David SDirectorJun 1, 2026award47,387———
Miskel Christopher C.DirectorSep 1, 2026award10,826———
Bloom Mark H.Vice PresidentAug 16, 2026option exercise5,023———
Barrat Sherry SDirectorMay 13, 2025award18,073———
Harries Richard de Winton WilkinDirectorMay 12, 2026award2,413———
Caplan Deborah HDirectorMay 12, 2026award2,650———
Clarke Teresa HillaryDirectorMay 12, 2026award5,567———
Coldman David JohnDirectorMay 12, 2026award16,344———
Nicoletti Ralph JDirectorMay 12, 2026award18,414———
Rosenthal Norman LDirectorMay 12, 2026award43,327———

Questions

Are Arthur J. Gallagher & Co. insiders buying or selling?

Over the twelve months to November 1, 2026, 6 insiders at Arthur J. Gallagher & Co. sold $25M of stock in the open market, all by officers and directors, and 1 insider bought $988K, all by officers and directors. Net, insiders sold $24M. Only open-market purchases and sales are counted.

Who sold the most Arthur J. Gallagher & Co. stock in the last year?

Bay Walter D. (General Counsel) sold $7M in 2 open-market sales over the twelve months to November 1, 2026.

Do Arthur J. Gallagher & Co. executives sell under 10b5-1 plans?

0 of the 13 open-market sales in the last twelve months (0%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Arthur J. Gallagher & Co.

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.