J
$ Value
$3K
Shares
2
Price
$2K
Filed
Apr 15
Insider
Name
Costanzo Brian J.
Title
Chief Financial Officer
CIK
0001873434
Roles
Officer
Transaction Details
Transaction Date
2026-03-31
Code
J
Table
Non-Derivative
Ownership
Direct
Equity Swap
No
Shares After
1,613
Footnotes
Shares acquired under the qualified component of the MKL 2020 Employee Stock Purchase Plan in a transaction exempt under Exchange Act Rule 16b-3(c). | Between December 31, 2025 and March 31, 2026, the reporting person acquired 2.487 shares under the MKL 401(k) plan. The information reported herein is based on the plan balance as of March 31, 2026.
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
|
— | — | 2026-02-24 |
|
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 |