A
$ Value
$0
Shares
655
Price
$0
Filed
Feb 26
Insider
Name
Costanzo Brian J.
Title
Chief Financial Officer
CIK
0001873434
Roles
Officer
Transaction Details
Transaction Date
2026-02-24
Code
A
Table
Non-Derivative
Ownership
Direct
Equity Swap
No
Shares After
1,611
Footnotes
Restricted stock units (RSUs) awarded pursuant to the MKL 2024 Equity Incentive Compensation Plan. Subject to certain conditions, 539.739 RSUs will vest on December 31, 2028, and 114.902 RSUs will vest on February 24, 2029. | The information reported herein is based on MKL 401(k) plan balance as of December 31, 2025.
Filing Info
Costanzo Brian J.'s History
| Date | Ticker | Type | Value |
|---|---|---|---|
| 2026-03-31 | MKL | J | $3K |
| 2026-02-24 | MKL | A | $0 |
| 2025-12-31 | MKL | J | $4K |
| 2025-12-02 | MKL | F | $45K |
| 2025-09-30 | MKL | J | $3K |
| 2025-06-30 | MKL | J | $4K |
Other Insiders at MKL (90d)
| Insider | Bought | Sold | Last |
|---|---|---|---|
|
GAYNER THOMAS SINNICKSON
Chief Executive Officer
|
— | — | 2026-02-24 |
|
Grinnan Richard Randolph
SVP, Chief Legal Officer & Sec
|
— | — | 2026-02-24 |
|
Costanzo Brian J.
Chief Financial Officer
|
— | — | 2026-03-31 |
|
Crowley Andrew G.
EVP & Pres., Markel Ventures
|
— | — | 2026-03-31 |
|
Grandis Meade P.
CAO and Controller
|
— | — | 2026-02-24 |
|
Wilson Simon
CEO, Markel Insurance
|
— | — | 2026-02-17 |
|
Wilson Simon
EVP and CEO, Markel Insurance
|
— | $208K | 2026-02-26 |