Insider txns (12m)
70
Stock / equity
MKL MARKEL GROUP INC.
- Company
- MARKEL GROUP INC.
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 17
- Members of Congress
- 2
- Latest trade on record
- September 30, 2026
MKL (MARKEL GROUP INC.) has 70 disclosed insider transactions from 17 insiders in the last 12 months (3 open-market buys, 34 sales, about $7.6M at reported prices) and 11 congressional trades from 2 members of Congress. The most recent disclosure was filed October 16, 2026.
Open-market buys / sales
3 / 34
Congress trades (12m)
11
Distinct filers (12m)
19
Share price
Price and chart by TradingView for MARKEL GROUP INC.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
MKL in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in MKL over the last 12 months; the most active is MARKEL STEVEN A with $3.2M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 26 open-market trades in MKL since Nov 25, 2025, at prices from $1,789 to $2,130; the most recent was a sale at $1,846 on May 22, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Costanzo Brian J.Crowley Andrew G.
Costanzo Brian J. reported 1,634 shares held after the latest filing, against 976 at the first on record.
Lobbying spend by quarter
How much has MARKEL GROUP INC. reported spending on federal lobbying?
MARKEL GROUP INC. reported $150K in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders trading MKL
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 17.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| MARKEL STEVEN A | Director | 19 | 0 | 18 | — | $3.2M | December 11, 2025 |
| Costanzo Brian J. | Chief Financial Officer | 9 | 0 | 2 | — | $69K | September 30, 2026 |
| Crowley Andrew G. | President, Markel Ventures | 7 | 0 | 2 | — | $272K | July 15, 2026 |
| Wilson Simon | CEO, Markel Insurance | 5 | 0 | 4 | — | $655K | February 26, 2026 |
| Leopold Diane | Director | 4 | 2 | 0 | $269K | — | June 15, 2026 |
| Harris Greta J | Director | 4 | 0 | 3 | — | $140K | May 22, 2026 |
| Puckett A. Lynne | Director | 3 | 1 | 0 | $102K | — | June 15, 2026 |
| GAYNER THOMAS SINNICKSON | Director | 3 | 0 | 2 | — | $964K | May 15, 2026 |
| Grinnan Richard Randolph | SVP, Chief Legal Officer & Sec | 3 | 0 | 2 | — | $499K | May 15, 2026 |
| Besca Mark | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
| Cunningham Lawrence A | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
| Housel Morgan E. | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
| MICHAEL JONATHAN E | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
| Morrison Harold Lawrence Jr. | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
| OREILLY MICHAEL | Director | 2 | 0 | 0 | — | — | June 15, 2026 |
What kind of transactions these are 6 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| S | Open-market sale | 23 | 1,751 | $3.7M |
| J | Other acquisition or disposal | 18 | 620 | $1.0M |
| A | Grant or award | 15 | 8,508 | — |
| F | Shares withheld for tax | 11 | 1,305 | $2.5M |
| P | Open-market purchase | 3 | 207 | $371K |
| G | Gift | 1 | 500 | — |
What each code means: Form 4 transaction codes.
Members of Congress trading MKL
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| April McClain Delaney | Representative (MD, District 6), Democrat | 8 | 3 | 5 | $107K–$355K | August 25, 2026 |
| Thomas H. Kean, Jr. | Representative (NJ, District 7), Republican | 4 | 0 | 4 | $32K–$130K | June 29, 2026 |
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Costanzo Brian J. | Other J | September 30, 2026 | October 16, 2026 | 16d | 2 | $1,456 | $3,000 | late | Form 4 ↗ | |
| Costanzo Brian J. | Other J | June 30, 2026 | July 16, 2026 | 16d | 2 | $1,617 | $3,500 | late | Form 4 ↗ | |
| Crowley Andrew G. | Other J | July 15, 2026 | July 16, 2026 | 1d | 7 | $1,730 | $13K | Form 4 ↗ | ||
| Crowley Andrew G. | Other J | June 30, 2026 | July 16, 2026 | 16d | 3 | $1,617 | $4,555 | late | Form 4 ↗ | |
| Besca Mark | Other J | June 15, 2026 | June 17, 2026 | 2d | 81 | $1,669 | $135K | Form 4 ↗ | ||
| Housel Morgan E. | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| Leopold Diane | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| MICHAEL JONATHAN E | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| Morrison Harold Lawrence Jr. | Other J | June 15, 2026 | June 17, 2026 | 2d | 33 | $1,669 | $55K | Form 4 ↗ | ||
| Cunningham Lawrence A | Other J | June 15, 2026 | June 17, 2026 | 2d | 33 | $1,669 | $55K | Form 4 ↗ | ||
| Puckett A. Lynne | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| OREILLY MICHAEL | Other J | June 15, 2026 | June 17, 2026 | 2d | 90 | $1,669 | $150K | Form 4 ↗ | ||
| Harris Greta J | Sell S | May 22, 2026 | May 27, 2026 | 5d | 27 | $1,849 | $50K | late | Form 4 ↗ | |
| Harris Greta J | Sell S | May 22, 2026 | May 27, 2026 | 5d | 14 | $1,847 | $26K | late | Form 4 ↗ | |
| Harris Greta J | Sell S | May 22, 2026 | May 27, 2026 | 5d | 35 | $1,846 | $65K | late | Form 4 ↗ | |
| MICHAEL JONATHAN E | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Morrison Harold Lawrence Jr. | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Besca Mark | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Harris Greta J | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Cunningham Lawrence A | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| OREILLY MICHAEL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Housel Morgan E. | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Puckett A. Lynne | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Leopold Diane | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| GAYNER THOMAS SINNICKSON | Sell F | May 15, 2026 | May 19, 2026 | 4d | 482 | $1,844 | $888K | Form 4 ↗ | ||
| Grinnan Richard Randolph | Sell F | May 15, 2026 | May 19, 2026 | 4d | 116 | $1,844 | $215K | Form 4 ↗ | ||
| Crowley Andrew G. | Other J | May 15, 2026 | May 19, 2026 | 4d | 60 | $1,660 | $100K | Form 4 ↗ | ||
| Crowley Andrew G. | Sell F | May 15, 2026 | May 19, 2026 | 4d | 75 | $1,844 | $138K | Form 4 ↗ | ||
| Costanzo Brian J. | Other J | May 15, 2026 | May 19, 2026 | 4d | 30 | $1,660 | $50K | Form 4 ↗ | ||
| Costanzo Brian J. | Sell F | May 15, 2026 | May 19, 2026 | 4d | 13 | $1,844 | $24K | Form 4 ↗ | ||
| Leopold Diane | Buy P | May 7, 2026 | May 8, 2026 | 1d | 50 | $1,789 | $89K | indirect | Form 4 ↗ | |
| Leopold Diane | Buy P | May 6, 2026 | May 8, 2026 | 2d | 100 | $1,793 | $179K | Form 4 ↗ | ||
| Puckett A. Lynne | Buy P | May 1, 2026 | May 5, 2026 | 4d | 57 | $1,796 | $102K | indirect | Form 4 ↗ | |
| Crowley Andrew G. | Other J | March 31, 2026 | April 15, 2026 | 15d | 9 | $1,627 | $15K | late | Form 4 ↗ | |
| Costanzo Brian J. | Other J | March 31, 2026 | April 15, 2026 | 15d | 2 | $1,627 | $3,000 | late | Form 4 ↗ | |
| Costanzo Brian J. | Other A | February 24, 2026 | February 26, 2026 | 2d | 655 | — | — | Form 4 ↗ | ||
| Crowley Andrew G. | Other A | February 24, 2026 | February 26, 2026 | 2d | 830 | — | — | Form 4 ↗ | ||
| Grinnan Richard Randolph | Other A | February 24, 2026 | February 26, 2026 | 2d | 801 | — | — | Form 4 ↗ | ||
| Grandis Meade P. | Other A | February 24, 2026 | February 26, 2026 | 2d | 70 | — | — | Form 4 ↗ | ||
| GAYNER THOMAS SINNICKSON | Other A | February 24, 2026 | February 26, 2026 | 2d | 4,484 | — | — | Form 4 ↗ | ||
| Wilson Simon | Sell S | February 26, 2026 | February 26, 2026 | 0d | 100 | $2,079 | $208K | Form 4 ↗ | ||
| Wilson Simon | Other A | February 24, 2026 | February 26, 2026 | 2d | 868 | — | — | Form 4 ↗ | ||
| Wilson Simon | Sell F | February 17, 2026 | February 19, 2026 | 2d | 47 | $2,084 | $98K | Form 4 ↗ | ||
| Costanzo Brian J. | Other J | December 31, 2025 | January 20, 2026 | 20d | 2 | $1,603 | $3,500 | late | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 120 | $2,130 | $256K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 10 | $2,128 | $21K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 190 | $2,127 | $404K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 75 | $2,126 | $159K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 32 | $2,125 | $68K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 10 | $2,123 | $21K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 173 | $2,122 | $367K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 51 | $2,121 | $108K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 24 | $2,118 | $51K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 201 | $2,117 | $426K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 100 | $2,116 | $212K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 120 | $2,115 | $254K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 40 | $2,112 | $84K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 70 | $2,108 | $148K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 50 | $2,104 | $105K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | December 11, 2025 | December 15, 2025 | 4d | 64 | $2,100 | $134K | 10b5-1 plan | Form 4 ↗ | |
| GAYNER THOMAS SINNICKSON | Sell F | December 2, 2025 | December 3, 2025 | 1d | 37 | $2,061 | $75K | Form 4 ↗ | ||
| Wilson Simon | Sell F | December 2, 2025 | December 3, 2025 | 1d | 94 | $2,061 | $194K | Form 4 ↗ | ||
| Heaton Michael R | Sell F | December 2, 2025 | December 3, 2025 | 1d | 217 | $2,061 | $448K | Form 4 ↗ | ||
| Grinnan Richard Randolph | Sell F | December 2, 2025 | December 3, 2025 | 1d | 138 | $2,061 | $284K | Form 4 ↗ | ||
| Crowley Andrew G. | Sell F | December 2, 2025 | December 3, 2025 | 1d | 65 | $2,061 | $133K | Form 4 ↗ | ||
| Costanzo Brian J. | Sell F | December 2, 2025 | December 3, 2025 | 1d | 22 | $2,061 | $45K | Form 4 ↗ | ||
| MARKEL STEVEN A | Sell S | November 28, 2025 | December 1, 2025 | 3d | 100 | $2,100 | $210K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | Sell S | November 26, 2025 | December 1, 2025 | 5d | 70 | $2,100 | $147K | late10b5-1 plan | Form 4 ↗ | |
| Wilson Simon | Sell S | November 25, 2025 | November 25, 2025 | 0d | 75 | $2,073 | $155K | Form 4 ↗ | ||
| MARKEL STEVEN A | Other G | November 17, 2025 | November 18, 2025 | 1d | 500 | — | — | Form 4 ↗ | ||
| Costanzo Brian J. | Other J | September 30, 2025 | October 16, 2025 | 16d | 2 | $1,625 | $2,999 | late | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| April McClain Delaney | Sell | August 25, 2026 | September 9, 2026 | 15d | — | — | $100K–$250K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | July 28, 2026 | August 3, 2026 | 6d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | July 29, 2026 | August 3, 2026 | 5d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | July 24, 2026 | August 3, 2026 | 10d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | July 27, 2026 | August 3, 2026 | 7d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Thomas H. Kean, Jr. | Sell | June 29, 2026 | July 15, 2026 | 16d | — | — | $1,001–$15K | House PTR ↗ | ||
| Thomas H. Kean, Jr. | Sell | June 2, 2026 | July 15, 2026 | 43d | — | — | $1,001–$15K | House PTR ↗ | ||
| April McClain Delaney | Buy | May 1, 2026 | June 5, 2026 | 35d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | April 30, 2026 | May 6, 2026 | 6d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Thomas H. Kean, Jr. | Sell | January 23, 2026 | February 19, 2026 | 27d | — | — | $15K–$50K | House PTR ↗ | ||
| April McClain Delaney | Buy | November 3, 2025 | December 8, 2025 | 35d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Thomas H. Kean, Jr. | Sell | September 12, 2025 | October 14, 2025 | 32d | — | — | $15K–$50K | House PTR ↗ |
Related stocks
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Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 8 | 12 | October 14, 2025 | September 9, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 48 | 71 | October 16, 2025 | October 16, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.