Company / CIK 0001096343
MARKEL GROUP INC.
- Ticker
- MKL
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 17
- Members of Congress who traded it
- 2
- Federal contracts on record
- none matched
- Lobbying filings on record
- 3
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 30, 2026
MARKEL GROUP INC. (MKL) has 17 insiders on file who disclosed 70 transactions in the last 12 months (3 open-market buys, 34 sales, about $7.6M at reported prices), and 12 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 1 lobbying filing naming it as client report $50K in 2026.
MARKEL GROUP INC. 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 MARKEL GROUP INC. over the last 12 months; the most active is MARKEL STEVEN A with $3.2M.
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
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Costanzo Brian J. | Chief Financial Officer | 9 | 0 | 2 | October 16, 2026 |
| Leopold Diane | Director | 4 | 2 | 0 | July 20, 2026 |
| Crowley Andrew G. | President, Markel Ventures | 7 | 0 | 2 | July 16, 2026 |
| Puckett A. Lynne | Director | 3 | 1 | 0 | June 17, 2026 |
| Housel Morgan E. | Director | 2 | 0 | 0 | June 17, 2026 |
| OREILLY MICHAEL | Director | 2 | 0 | 0 | June 17, 2026 |
| Cunningham Lawrence A | Director | 2 | 0 | 0 | June 17, 2026 |
| Besca Mark | Director | 2 | 0 | 0 | June 17, 2026 |
| Morrison Harold Lawrence Jr. | Director | 2 | 0 | 0 | June 17, 2026 |
| MICHAEL JONATHAN E | Director | 2 | 0 | 0 | June 17, 2026 |
| Harris Greta J | Director | 4 | 0 | 3 | May 27, 2026 |
| Grinnan Richard Randolph | SVP, Chief Legal Officer & Sec | 3 | 0 | 2 | May 19, 2026 |
| GAYNER THOMAS SINNICKSON | Director | 3 | 0 | 2 | May 19, 2026 |
| Heaton Michael R | EVP & Chief Operating Officer | 1 | 0 | 1 | April 3, 2026 |
| Wilson Simon | CEO, Markel Insurance | 5 | 0 | 4 | February 26, 2026 |
| Grandis Meade P. | CAO and Controller | 1 | 0 | 0 | February 26, 2026 |
| MARKEL STEVEN A | Director | 19 | 0 | 18 | December 15, 2025 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded MKL
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the MKL page.
| 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 | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Costanzo Brian J. | MKL | Other J | September 30, 2026 | October 16, 2026 | 16d | 2 | $1,456 | $3,000 | late | Form 4 ↗ | |
| Costanzo Brian J. | MKL | Other J | June 30, 2026 | July 16, 2026 | 16d | 2 | $1,617 | $3,500 | late | Form 4 ↗ | |
| Crowley Andrew G. | MKL | Other J | July 15, 2026 | July 16, 2026 | 1d | 7 | $1,730 | $13K | Form 4 ↗ | ||
| Crowley Andrew G. | MKL | Other J | June 30, 2026 | July 16, 2026 | 16d | 3 | $1,617 | $4,555 | late | Form 4 ↗ | |
| Besca Mark | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 81 | $1,669 | $135K | Form 4 ↗ | ||
| Housel Morgan E. | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| Leopold Diane | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| MICHAEL JONATHAN E | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| Morrison Harold Lawrence Jr. | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 33 | $1,669 | $55K | Form 4 ↗ | ||
| Cunningham Lawrence A | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 33 | $1,669 | $55K | Form 4 ↗ | ||
| Puckett A. Lynne | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 66 | $1,669 | $110K | Form 4 ↗ | ||
| OREILLY MICHAEL | MKL | Other J | June 15, 2026 | June 17, 2026 | 2d | 90 | $1,669 | $150K | Form 4 ↗ | ||
| Harris Greta J | MKL | Sell S | May 22, 2026 | May 27, 2026 | 5d | 27 | $1,849 | $50K | late | Form 4 ↗ | |
| Harris Greta J | MKL | Sell S | May 22, 2026 | May 27, 2026 | 5d | 14 | $1,847 | $26K | late | Form 4 ↗ | |
| Harris Greta J | MKL | Sell S | May 22, 2026 | May 27, 2026 | 5d | 35 | $1,846 | $65K | late | Form 4 ↗ | |
| MICHAEL JONATHAN E | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Morrison Harold Lawrence Jr. | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Besca Mark | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Harris Greta J | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Cunningham Lawrence A | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| OREILLY MICHAEL | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Housel Morgan E. | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Puckett A. Lynne | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| Leopold Diane | MKL | Other A | May 20, 2026 | May 22, 2026 | 2d | 89 | — | — | Form 4 ↗ | ||
| GAYNER THOMAS SINNICKSON | MKL | Sell F | May 15, 2026 | May 19, 2026 | 4d | 482 | $1,844 | $888K | Form 4 ↗ | ||
| Grinnan Richard Randolph | MKL | Sell F | May 15, 2026 | May 19, 2026 | 4d | 116 | $1,844 | $215K | Form 4 ↗ | ||
| Crowley Andrew G. | MKL | Other J | May 15, 2026 | May 19, 2026 | 4d | 60 | $1,660 | $100K | Form 4 ↗ | ||
| Crowley Andrew G. | MKL | Sell F | May 15, 2026 | May 19, 2026 | 4d | 75 | $1,844 | $138K | Form 4 ↗ | ||
| Costanzo Brian J. | MKL | Other J | May 15, 2026 | May 19, 2026 | 4d | 30 | $1,660 | $50K | Form 4 ↗ | ||
| Costanzo Brian J. | MKL | Sell F | May 15, 2026 | May 19, 2026 | 4d | 13 | $1,844 | $24K | Form 4 ↗ | ||
| Leopold Diane | MKL | Buy P | May 7, 2026 | May 8, 2026 | 1d | 50 | $1,789 | $89K | indirect | Form 4 ↗ | |
| Leopold Diane | MKL | Buy P | May 6, 2026 | May 8, 2026 | 2d | 100 | $1,793 | $179K | Form 4 ↗ | ||
| Puckett A. Lynne | MKL | Buy P | May 1, 2026 | May 5, 2026 | 4d | 57 | $1,796 | $102K | indirect | Form 4 ↗ | |
| Crowley Andrew G. | MKL | Other J | March 31, 2026 | April 15, 2026 | 15d | 9 | $1,627 | $15K | late | Form 4 ↗ | |
| Costanzo Brian J. | MKL | Other J | March 31, 2026 | April 15, 2026 | 15d | 2 | $1,627 | $3,000 | late | Form 4 ↗ | |
| Costanzo Brian J. | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 655 | — | — | Form 4 ↗ | ||
| Crowley Andrew G. | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 830 | — | — | Form 4 ↗ | ||
| Grinnan Richard Randolph | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 801 | — | — | Form 4 ↗ | ||
| Grandis Meade P. | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 70 | — | — | Form 4 ↗ | ||
| GAYNER THOMAS SINNICKSON | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 4,484 | — | — | Form 4 ↗ | ||
| Wilson Simon | MKL | Sell S | February 26, 2026 | February 26, 2026 | 0d | 100 | $2,079 | $208K | Form 4 ↗ | ||
| Wilson Simon | MKL | Other A | February 24, 2026 | February 26, 2026 | 2d | 868 | — | — | Form 4 ↗ | ||
| Wilson Simon | MKL | Sell F | February 17, 2026 | February 19, 2026 | 2d | 47 | $2,084 | $98K | Form 4 ↗ | ||
| Costanzo Brian J. | MKL | Other J | December 31, 2025 | January 20, 2026 | 20d | 2 | $1,603 | $3,500 | late | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 120 | $2,130 | $256K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 10 | $2,128 | $21K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 190 | $2,127 | $404K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 75 | $2,126 | $159K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 32 | $2,125 | $68K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 10 | $2,123 | $21K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 173 | $2,122 | $367K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 51 | $2,121 | $108K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 24 | $2,118 | $51K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 201 | $2,117 | $426K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 100 | $2,116 | $212K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 120 | $2,115 | $254K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 40 | $2,112 | $84K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 70 | $2,108 | $148K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 50 | $2,104 | $105K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | December 11, 2025 | December 15, 2025 | 4d | 64 | $2,100 | $134K | 10b5-1 plan | Form 4 ↗ | |
| GAYNER THOMAS SINNICKSON | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 37 | $2,061 | $75K | Form 4 ↗ | ||
| Wilson Simon | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 94 | $2,061 | $194K | Form 4 ↗ | ||
| Heaton Michael R | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 217 | $2,061 | $448K | Form 4 ↗ | ||
| Grinnan Richard Randolph | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 138 | $2,061 | $284K | Form 4 ↗ | ||
| Crowley Andrew G. | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 65 | $2,061 | $133K | Form 4 ↗ | ||
| Costanzo Brian J. | MKL | Sell F | December 2, 2025 | December 3, 2025 | 1d | 22 | $2,061 | $45K | Form 4 ↗ | ||
| MARKEL STEVEN A | MKL | Sell S | November 28, 2025 | December 1, 2025 | 3d | 100 | $2,100 | $210K | 10b5-1 plan | Form 4 ↗ | |
| MARKEL STEVEN A | MKL | Sell S | November 26, 2025 | December 1, 2025 | 5d | 70 | $2,100 | $147K | late10b5-1 plan | Form 4 ↗ | |
| Wilson Simon | MKL | Sell S | November 25, 2025 | November 25, 2025 | 0d | 75 | $2,073 | $155K | Form 4 ↗ | ||
| MARKEL STEVEN A | MKL | Other G | November 17, 2025 | November 18, 2025 | 1d | 500 | — | — | Form 4 ↗ | ||
| Costanzo Brian J. | MKL | Other J | September 30, 2025 | October 16, 2025 | 16d | 2 | $1,625 | $2,999 | late | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "MARKEL GROUP INC.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q1 | ALIGNMENT GOVERNMENT STRATEGIES | Financial Institutions/Investments/Securities | $50,000 | LDA ↗ |
| 2025 Q4 | ALIGNMENT GOVERNMENT STRATEGIES | Financial Institutions/Investments/Securities | $50,000 | LDA ↗ |
| 2025 Q3 | ALIGNMENT GOVERNMENT STRATEGIES | Financial Institutions/Investments/Securities | $50,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded MKL, by number of filers in common. It shows overlap in public filings and nothing else.
- nVent Electric plc NVT 2 filers in common
- TransDigm Group INC TDG 1 filer in common
- Alphabet Inc. GOOGL 1 filer in common
- AMAZON COM INC AMZN 1 filer in common
- Toast, Inc. TOST 1 filer in common
- ANALOG DEVICES INC ADI 1 filer in common
- Morningstar, Inc. MORN 1 filer in common
- JOHNSON & JOHNSON JNJ 1 filer in common
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.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
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 |
| Lobbying disclosure filings | 3 filings | — | — | — | LDA.gov search |
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.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.