Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>

Stock options: Exercise, Award, Grant, Conversion
Transaction Date |
Reported DateTime |
Exercisable Expiration |
Company | Symnbol | Insider Relationship |
Shares Traded |
Conversion Price |
Shares Owned |
Filing |
2025-03-31 Other |
2025-04-17 4:53 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,460 | 1,193 (Direct) |
View |
2025-02-18 Option Award |
2025-02-20 4:51 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
379 | $0 | 1,186 (Direct) |
View |
2024-12-31 Other |
2025-01-17 4:36 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,337 | 809 (Direct) |
View |
2024-12-05 Tax Withholding |
2024-12-09 4:50 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
21 | $1,759 | 804 (Direct) |
View |
2024-09-30 Other |
2024-10-16 4:33 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,333 | 827 (Direct) |
View |
2024-06-28 Other |
2024-07-17 4:35 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,282 | 823 (Direct) |
View |
2024-03-28 Other |
2024-04-18 4:43 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,221 | 817 (Direct) |
View |
2024-02-20 Option Award |
2024-02-27 4:38 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
108 | $0 | 810 (Direct) |
View |
2024-02-20 Option Award |
2024-02-22 4:38 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
94 | $0 | 702 (Direct) |
View |
2023-12-29 Other |
2024-01-17 4:36 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. Chief Financial Officer |
2 | $1,207 | 610 (Direct) |
View |
2023-12-05 Tax Withholding |
2023-12-06 4:37 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
15 | $1,401 | 603 (Direct) |
View |
2023-09-29 Other |
2023-10-17 4:33 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
2 | $1,165 | 621 (Direct) |
View |
2023-06-30 Other |
2023-07-14 6:01 pm |
N/A N/A |
MARKEL GROUP INC. | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
1 | $1,102 | 615 (Direct) |
View |
2023-05-16 Option Award |
2023-05-18 4:23 pm |
N/A N/A |
MARKEL CORP | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
29 | $0 | 610 (Direct) |
View |
2023-03-31 Other |
2023-04-28 4:36 pm |
N/A N/A |
MARKEL CORP | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
1 | $1,086 | 582 (Direct) |
View |
2023-02-14 Option Award |
2023-02-15 4:39 pm |
N/A N/A |
MARKEL CORP | MKL | Costanzo Brian J. SVP, Finance, CAO & Controller |
54 | $0 | 577 (Direct) |
View |
2022-02-15 Option Award |
2022-02-17 4:49 pm |
N/A N/A |
MARKEL CORP | MKL | Costanzo Brian J. CAO and Controller |
69 | $0 | 508 (Direct) |
View |
Ownership |
2021-08-23 5:12 pm |
N/A N/A |
MARKEL CORP | MKL | Costanzo Brian J. CAO and Controller |
0 | $0 | 431 (Direct) |
View |