Markel Corporation (MKL) has 20 known insider and institutional holders on record. The largest holder is MARKEL STEVEN A with 60,368 shares. Other notable holders include GAYNER THOMAS SINNICKSON and KIRSHNER ALAN I.
Over the last 12 months, insiders have made 54 transactions in MKL stock — 36 buys (valued at $1.02M) and 9 sells (valued at $2.81M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
MKL Insider Ownership
Top Holder
MARKEL STEVEN A
60,368 shares
Buys (12 mo)
36
$1.02M value
Sells (12 mo)
9
$2.81M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Markel Steven A |
Director |
60,368 |
2025-12-15 |
|
| 2 |
Gayner Thomas Sinnickson |
Chief Executive Officer |
56,741 |
2026-02-26 |
|
| 3 |
Kirshner Alan I |
Executive Chairman |
20,453 |
2020-04-09 |
|
| 4 |
Markel Anthony F |
Director |
15,000 |
2025-02-25 |
|
| 5 |
Martin Darrell D |
Director |
11,540 |
2020-05-12 |
|
| 6 |
Whitt Richard R Iii |
Co-chief Executive Officer |
11,360 |
2022-12-07 |
|
| 7 |
Kiscaden Bradley James |
Pres/chief Admin Off-ins Ops |
8,090 |
2022-02-17 |
|
| 8 |
Schewel Michael Jay |
Director |
6,267 |
2020-01-17 |
|
| 9 |
Lewis Lemuel E |
Director |
5,741 |
2021-05-17 |
|
| 10 |
Noble Jeremy Andrew |
President, Insurance |
4,888 |
2025-02-20 |
|
| 11 |
Heaton Michael R |
EVP & Chief Operating Officer |
4,709 |
2025-12-03 |
|
| 12 |
Grinnan Richard Randolph |
SVP, Chief Legal Officer & Sec |
4,263 |
2026-02-26 |
|
| 13 |
Oreilly Michael |
Director |
3,756 |
2025-06-17 |
|
| 14 |
Wilson Debora J |
Director |
2,957 |
2020-05-04 |
|
| 15 |
Crowley Andrew G. |
EVP & Pres., Markel Ventures |
2,744 |
2026-02-26 |
|
| 16 |
Wilson Simon |
EVP and CEO, Markel Insurance |
2,497 |
2026-02-26 |
|
| 17 |
Cox Robert C |
Pres. & COO, Insur. Operations |
2,346 |
2022-12-07 |
|
| 18 |
Crouch Nora N |
Chief Accounting Officer |
2,250 |
2020-02-20 |
|
| 19 |
Connell K Bruce |
Director |
2,226 |
2023-07-14 |
|
| 20 |
Leopold Diane |
Director |
2,090 |
2025-06-17 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-02-26 |
Wilson Simon |
EVP and CEO, Markel Insurance |
Informative Sell |
100 |
$2,079.48 |
$207.95K |
| 2026-02-24 |
Wilson Simon |
EVP and CEO, Markel Insurance |
RSU Award |
868 |
- |
- |
| 2026-02-24 |
Grandis Meade P. |
CAO and Controller |
RSU Award |
70 |
- |
- |
| 2026-02-24 |
Crowley Andrew G. |
EVP & Pres., Markel Ventures |
RSU Award |
830 |
- |
- |
| 2026-02-24 |
Costanzo Brian J. |
Chief Financial Officer |
RSU Award |
655 |
- |
- |
| 2026-02-24 |
Grinnan Richard Randolph |
SVP, Chief Legal Officer & Sec |
RSU Award |
801 |
- |
- |
| 2026-02-24 |
Gayner Thomas Sinnickson |
Chief Executive Officer |
RSU Award |
4,484 |
- |
- |
| 2026-02-17 |
Wilson Simon |
CEO, Markel Insurance |
Tax Withholding of RSU |
47 |
$2,084.46 |
$97.97K |
| 2025-12-31 |
Costanzo Brian J. |
Chief Financial Officer |
Other (Buy) |
2 |
$1,602.62 |
$3.21K |
| 2025-12-11 |
Markel Steven A |
Director |
Informative Sell |
120 |
$2,129.98 |
$255.6K |
| 2025-12-02 |
Wilson Simon |
CEO, Markel Insurance |
Tax Withholding of RSU |
94 |
$2,060.83 |
$193.72K |
| 2025-12-02 |
Crowley Andrew G. |
President, Markel Ventures |
Tax Withholding of RSU |
65 |
$2,060.83 |
$133.95K |
| 2025-12-02 |
Costanzo Brian J. |
Chief Financial Officer |
Tax Withholding of RSU |
22 |
$2,060.83 |
$45.34K |
| 2025-12-02 |
Heaton Michael R |
EVP & Chief Operating Officer |
Tax Withholding of RSU |
217 |
$2,060.83 |
$447.2K |
| 2025-12-02 |
Grinnan Richard Randolph |
SVP, Chief Legal Officer & Sec |
Tax Withholding of RSU |
138 |
$2,060.83 |
$284.39K |
| 2025-12-02 |
Gayner Thomas Sinnickson |
Chief Executive Officer |
Tax Withholding of RSU |
37 |
$2,060.83 |
$76.25K |
| 2025-11-28 |
Markel Steven A |
Director |
Informative Sell |
100 |
$2,100.00 |
$210K |
| 2025-11-26 |
Markel Steven A |
Director |
Informative Sell |
70 |
$2,100.00 |
$147K |
| 2025-11-25 |
Wilson Simon |
CEO, Markel Insurance |
Informative Sell |
75 |
$2,072.94 |
$155.47K |
| 2025-11-17 |
Markel Steven A |
Director |
Gift (Given) |
500 |
- |
- |
| 2025-09-30 |
Costanzo Brian J. |
Chief Financial Officer |
Other (Buy) |
2 |
$1,624.66 |
$3.25K |
| 2025-08-25 |
Grandis Meade P. |
CAO and Controller |
Informative Sell |
75 |
$1,983.78 |
$148.78K |
| 2025-07-15 |
Crowley Andrew G. |
President, Markel Ventures |
Other (Buy) |
6 |
$1,779.25 |
$10.68K |
| 2025-06-30 |
Costanzo Brian J. |
Chief Financial Officer |
Other (Buy) |
2 |
$1,580.87 |
$3.16K |
| 2025-06-13 |
Crowley Andrew G. |
President, Markel Ventures |
Other (Buy) |
9 |
$1,735.89 |
$15.62K |
