The Filings Report

Markel Group Inc. insider trading

MKLfinancial statementsForm 4 filings on EDGAR184 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at Markel Group Inc. bought $0 of stock in the open market, and 0 sold $0. Officers and directors accounted for $0 of purchases and $0 of sales. The last reported transaction was an other by Costanzo Brian J. on September 30, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 16, 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.

MKL daily priceSplit-adjusted prices in US dollars

Bought $0Sold $0Aug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $1895.89 · H $1899.98 · L $1861.98 · C $1869.82Bought $0 (0)Sold $0 (0)
$1692$1749$1807$1865$19222026-08-04: open $1879.09, high $1910.00, low $1870.00, close $1887.652026-08-05: open $1896.86, high $1904.64, low $1868.00, close $1878.032026-08-06: open $1893.92, high $1893.92, low $1862.69, close $1871.332026-08-07: open $1866.13, high $1884.75, low $1861.50, close $1875.052026-08-10: open $1875.05, high $1888.67, low $1837.31, close $1840.082026-08-11: open $1841.00, high $1854.95, low $1835.00, close $1841.042026-08-12: open $1828.81, high $1854.83, low $1825.00, close $1842.462026-08-13: open $1850.48, high $1868.46, low $1827.12, close $1836.982026-08-14: open $1830.00, high $1849.86, low $1826.87, close $1847.242026-08-17: open $1844.60, high $1845.25, low $1795.01, close $1799.202026-08-18: open $1820.00, high $1832.87, low $1811.39, close $1815.092026-08-19: open $1808.19, high $1826.96, low $1793.66, close $1795.042026-08-20: open $1790.00, high $1798.81, low $1783.00, close $1788.292026-08-21: open $1792.71, high $1802.56, low $1785.88, close $1795.622026-08-24: open $1794.64, high $1820.75, low $1794.64, close $1817.302026-08-25: open $1818.67, high $1820.17, low $1802.99, close $1808.902026-08-26: open $1809.00, high $1831.03, low $1808.93, close $1815.572026-08-27: open $1832.90, high $1832.90, low $1791.00, close $1805.822026-08-28: open $1815.00, high $1824.03, low $1807.15, close $1818.692026-08-31: open $1810.31, high $1813.69, low $1798.00, close $1802.912026-09-01: open $1808.28, high $1820.00, low $1793.03, close $1797.282026-09-02: open $1817.02, high $1841.23, low $1800.50, close $1816.062026-09-03: open $1835.00, high $1849.11, low $1827.35, close $1842.982026-09-04: open $1826.91, high $1843.14, low $1826.00, close $1826.722026-09-08: open $1803.01, high $1812.99, low $1785.00, close $1785.712026-09-09: open $1782.29, high $1788.30, low $1773.00, close $1785.742026-09-10: open $1798.44, high $1803.60, low $1767.60, close $1781.712026-09-11: open $1793.00, high $1793.39, low $1769.43, close $1784.182026-09-14: open $1795.11, high $1807.00, low $1788.60, close $1798.462026-09-15: open $1798.46, high $1801.07, low $1779.58, close $1791.982026-09-16: open $1791.24, high $1800.00, low $1778.14, close $1787.652026-09-17: open $1800.00, high $1800.00, low $1781.24, close $1785.242026-09-18: open $1779.03, high $1791.74, low $1771.76, close $1776.332026-09-21: open $1776.47, high $1794.00, low $1772.83, close $1774.642026-09-22: open $1775.00, high $1780.54, low $1746.45, close $1763.362026-09-23: open $1756.30, high $1771.49, low $1739.01, close $1741.872026-09-24: open $1747.23, high $1762.96, low $1732.58, close $1735.232026-09-25: open $1739.61, high $1740.62, low $1716.00, close $1727.732026-09-28: open $1725.40, high $1741.46, low $1716.50, close $1740.402026-09-29: open $1735.85, high $1742.98, low $1726.72, close $1740.092026-09-30: open $1740.09, high $1741.74, low $1712.45, close $1712.452026-10-01: open $1710.00, high $1729.65, low $1704.17, close $1726.112026-10-02: open $1728.13, high $1739.16, low $1717.37, close $1737.182026-10-05: open $1745.53, high $1749.39, low $1722.83, close $1726.582026-10-06: open $1730.13, high $1749.18, low $1720.05, close $1738.332026-10-07: open $1722.70, high $1736.03, low $1720.71, close $1728.202026-10-08: open $1725.63, high $1778.67, low $1722.08, close $1767.822026-10-09: open $1764.83, high $1773.57, low $1759.02, close $1760.742026-10-12: open $1770.00, high $1793.95, low $1767.63, close $1790.322026-10-13: open $1801.47, high $1803.22, low $1785.00, close $1789.272026-10-14: open $1789.27, high $1797.73, low $1771.33, close $1797.102026-10-15: open $1818.18, high $1849.00, low $1813.69, close $1824.542026-10-16: open $1838.03, high $1858.63, low $1832.53, close $1850.132026-10-19: open $1843.30, high $1863.36, low $1843.30, close $1855.842026-10-20: open $1862.59, high $1884.68, low $1856.00, close $1884.102026-10-21: open $1885.06, high $1891.00, low $1866.51, close $1871.942026-10-22: open $1878.41, high $1909.28, low $1872.75, close $1905.392026-10-23: open $1900.00, high $1908.10, low $1866.60, close $1870.092026-10-26: open $1879.34, high $1899.32, low $1874.00, close $1874.002026-10-27: open $1866.08, high $1873.07, low $1855.65, close $1858.622026-10-28: open $1856.01, high $1863.16, low $1837.82, close $1844.762026-10-29: open $1873.74, high $1902.17, low $1838.20, close $1867.192026-10-30: open $1895.89, high $1899.98, low $1861.98, close $1869.82Insider purchases / sales · USD$0No open-market purchases or sales in this period.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

184 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 30, 2026Costanzo Brian J.Chief Financial Officerother2$1455.58$3K1,634Oct 16, 2026
Sep 11, 2026Markel Group INC.10% ownerconversion8M——11MSep 14, 2026
Jul 15, 2026Crowley Andrew G.EVP & Pres., Markel Venturesother7$1730.49$13K2,749Jul 16, 2026
Jun 30, 2026Costanzo Brian J.Chief Financial Officerother2$1617.19$4K1,632Jul 16, 2026
Jun 30, 2026Crowley Andrew G.EVP & Pres., Markel Venturesother3$1617.19$5K2,741Jul 16, 2026
Jun 15, 2026Besca MarkDirectorother81$1668.65$135K1,222Jun 17, 2026
Jun 15, 2026Housel Morgan E.Directorother66$1668.65$110K1,029Jun 17, 2026
Jun 15, 2026Leopold DianeDirectorother66$1668.65$110K2,345Jun 17, 2026
Jun 15, 2026Michael Jonathan EDirectorother66$1668.65$110K333Jun 17, 2026
Jun 15, 2026Morrison Harold Lawrence Jr.Directorother33$1668.65$55K1,127Jun 17, 2026
Jun 15, 2026Cunningham Lawrence ADirectorother33$1668.65$55K1,042Jun 17, 2026
Jun 15, 2026Puckett A. LynneDirectorother66$1668.65$110K507Jun 17, 2026
Jun 15, 2026Oreilly MichaelDirectorother90$1668.65$150K3,935Jun 17, 2026
May 22, 2026Harris Greta JDirectoropen-market sale35$1846.12$65K686May 27, 2026
May 22, 2026Harris Greta JDirectoropen-market sale14$1847.36$26K672May 27, 2026
May 22, 2026Harris Greta JDirectoropen-market sale27$1848.83$50K645May 27, 2026
May 20, 2026Michael Jonathan EDirectoraward89$0.00—267May 22, 2026
May 20, 2026Morrison Harold Lawrence Jr.Directoraward89$0.00—1,094May 22, 2026
May 20, 2026Besca MarkDirectoraward89$0.00—1,141May 22, 2026
May 20, 2026Harris Greta JDirectoraward89$0.00—721May 22, 2026
May 20, 2026Cunningham Lawrence ADirectoraward89$0.00—1,009May 22, 2026
May 20, 2026Oreilly MichaelDirectoraward89$0.00—3,845May 22, 2026
May 20, 2026Housel Morgan E.Directoraward89$0.00—963May 22, 2026
May 20, 2026Puckett A. LynneDirectoraward89$0.00—441May 22, 2026
May 20, 2026Leopold DianeDirectoraward89$0.00—2,279May 22, 2026
May 15, 2026Gayner Thomas SinnicksonChief Executive Officer, Directortax withholding482$1844.00$888K56,260May 19, 2026
May 15, 2026Grinnan Richard RandolphSVP, Chief Legal Officer & Sectax withholding116$1844.00$215K4,147May 19, 2026
May 15, 2026Crowley Andrew G.EVP & Pres., Markel Venturestax withholding75$1844.00$138K2,678May 19, 2026
May 15, 2026Crowley Andrew G.EVP & Pres., Markel Venturesother60$1659.60$100K2,738May 19, 2026
May 15, 2026Costanzo Brian J.Chief Financial Officertax withholding13$1844.00$24K1,600May 19, 2026
May 15, 2026Costanzo Brian J.Chief Financial Officerother30$1659.60$50K1,630May 19, 2026
May 7, 2026Leopold DianeDirectoropen-market buyindirect50$1789.19$89K550May 8, 2026
May 6, 2026Leopold DianeDirectoropen-market buy100$1792.61$179K2,190May 8, 2026
May 1, 2026Puckett A. LynneDirectoropen-market buyindirect57$1795.53$102K1,463May 5, 2026
Mar 31, 2026Crowley Andrew G.EVP & Pres., Markel Venturesother9$1626.96$15K2,753Apr 15, 2026
Mar 31, 2026Costanzo Brian J.Chief Financial Officerother2$1626.96$3K1,613Apr 15, 2026
Feb 26, 2026Wilson SimonEVP and CEO, Markel Insuranceopen-market sale100$2079.48$208K2,397Feb 26, 2026
Feb 24, 2026Costanzo Brian J.Chief Financial Officeraward655$0.00—1,611Feb 26, 2026
Feb 24, 2026Crowley Andrew G.EVP & Pres., Markel Venturesaward830$0.00—2,744Feb 26, 2026
Feb 24, 2026Grinnan Richard RandolphSVP, Chief Legal Officer & Secaward801$0.00—4,263Feb 26, 2026
Feb 24, 2026Grandis Meade P.CAO and Controlleraward70$0.00—294Feb 26, 2026
Feb 24, 2026Gayner Thomas SinnicksonChief Executive Officer, Directoraward4,484$0.00—56,741Feb 26, 2026
Feb 24, 2026Wilson SimonEVP and CEO, Markel Insuranceaward868$0.00—2,497Feb 26, 2026
Feb 17, 2026Wilson SimonCEO, Markel Insurancetax withholding47$2084.46$98K1,629Feb 19, 2026
Dec 31, 2025Costanzo Brian J.Chief Financial Officerother2$1602.62$3K957Jan 20, 2026
Dec 11, 2025Markel Steven ADirectoropen-market sale10b5-140$2112.03$84K61,474Dec 15, 2025
Dec 11, 2025Markel Steven ADirectoropen-market sale10b5-1120$2114.99$254K61,354Dec 15, 2025
Dec 11, 2025Markel Steven ADirectoropen-market sale10b5-1100$2116.18$212K61,254Dec 15, 2025
Dec 11, 2025Markel Steven ADirectoropen-market sale10b5-1201$2117.37$426K61,053Dec 15, 2025
Dec 11, 2025Markel Steven ADirectoropen-market sale10b5-124$2118.37$51K61,029Dec 15, 2025

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
Markel Steven ADirectorDec 11, 2025open-market sale61,474—$3M (18)18 of 18
Wilson SimonEVP and CEO, Markel InsuranceFeb 26, 2026open-market sale2,397—$363K (2)0 of 2
Leopold DianeDirectorJun 15, 2026other2,345$269K (2)——
Harris Greta JDirectorMay 22, 2026open-market sale686—$140K (3)0 of 3
Puckett A. LynneDirectorJun 15, 2026other507$102K (1)——
Crowley Andrew G.EVP & Pres., Markel VenturesJul 15, 2026other2,749———
Costanzo Brian J.Chief Financial OfficerSep 30, 2026other1,634———
Gayner Thomas SinnicksonChief Executive Officer, DirectorMay 15, 2026tax withholding56,260———
Michael Jonathan EDirectorJun 15, 2026other333———
Cunningham Lawrence ADirectorJun 15, 2026other1,042———
Grinnan Richard RandolphSVP, Chief Legal Officer & SecMay 15, 2026tax withholding4,147———
Grandis Meade P.CAO and ControllerFeb 24, 2026award294———
Heaton Michael REVP & Chief Operating OfficerDec 2, 2025tax withholding4,709———
Noble Jeremy AndrewPresident, InsuranceFeb 18, 2025award4,888———
Housel Morgan E.DirectorJun 15, 2026other1,029———
Morrison Harold Lawrence Jr.DirectorJun 15, 2026other1,127———
Oreilly MichaelDirectorJun 15, 2026other3,935———
Besca MarkDirectorJun 15, 2026other1,222———
Markel Anthony FDirectorFeb 24, 2025gift15,000———
Markel Group INC.10% ownerSep 11, 2026conversion11M———

Questions

Are Markel Group Inc. insiders buying or selling?

Over the twelve months to November 1, 2026, 3 insiders at Markel Group Inc. sold $4M of stock in the open market, all by officers and directors, and 2 insiders bought $371K, all by officers and directors. Net, insiders sold $3M. Only open-market purchases and sales are counted.

Who sold the most Markel Group Inc. stock in the last year?

Markel Steven A (Director) sold $3M in 18 open-market sales over the twelve months to November 1, 2026.

Do Markel Group Inc. executives sell under 10b5-1 plans?

18 of the 23 open-market sales in the last twelve months (78%) 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 Markel Group Inc.

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