Brian J. Costanzo - 30 Jun 2026 Form 4 Insider Report for MARKEL GROUP INC. (MKL)

Reporting relationship: Chief Financial Officer
Issuer ticker: MKL
Reported as of: 30 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 16 Jul 2026, 16:55:52 UTC
Prior SEC filing: 19 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Karen O. Earls, Attorney-in-fact for Brian J. Costanzo

Key filing fact

Brian J. Costanzo filed Form 4 for MARKEL GROUP INC. (MKL) on 16 Jul 2026.

Key facts

This page summarizes Brian J. Costanzo's Form 4 filing for MARKEL GROUP INC. (MKL).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 16 Jul 2026, 16:55.

Change

Previous filing in this sequence was filed on 19 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001873434 Primary reporting owner

Costanzo Brian J.

Relationship: Chief Financial Officer
Address: C/O MARKEL GROUP INC., 4521 HIGHWOODS PARKWAY, GLEN ALLEN
Signature: /s/ Karen O. Earls, Attorney-in-fact for Brian J. Costanzo
Signature date: 16 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MKL transaction

Common Stock

Other

Transaction value
Shares: +2
Change %: +0.13%
Price: $1617.19^*
Shares after: 1,632
Date: 30 Jun 2026
Ownership: Direct
Footnotes: F1

MKL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 230
Date: 30 Jun 2026
Ownership: 401(k) Plan
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

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).

Footnote F2

Between March 31, 2026 and June 30, 2026, the reporting person acquired 3.269 shares under the MKL 401(k) plan. The information reported herein is based on the plan balance as of June 30, 2026.