Transaction · 0001873434-26-000010

Costanzo Brian J.

Costanzo Brian J., CFO, reported a transaction classified as other at MARKEL GROUP INC. involving 2.061000 shares for an estimated $2999.95. Reported holdings after the transaction were 1634.300400 shares. A 10b5-1 reference was not detected in the stored filing text.

otherSEC transaction code JCFO
MKLMARKEL GROUP INC.
Trade date
Sep 30, 2026
Filing date
Oct 16, 2026
View on SEC Insider profile
Estimated value$2.99kShares × reported price
Shares traded2$1,455.58 per share
Holdings after1.63kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Calculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Filing warnings

Notes recorded with this filing
2 warnings
delayed filingThe filing was reported 16 calendar days after the transaction date.
ambiguous transaction codeThe transaction code is missing or represents other activity; review the filing and footnotes.

MKL price since this filing

Daily closing prices, with the filing date and available return windows
MKL · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -2.2%1w ago +0.0%1d ago +0.0%
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
other
Code J
Identifier
0001873434-26-000010
Common Stock
Transaction date
Sep 30, 2026
Filed Oct 16, 2026, 08:50 PM · 16d delay
Shares
2.061 sh
$1,455.58 per share
Estimated value
$2.99k
Computed from shares × price
Holdings after
1,634.3004 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Delayed Filing Direct Ownership
Filing-only score

-4 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • ambiguous_code-4 points

    transaction_code = J

    Other/ambiguous code reduces confidence.
  • delayed_filing-6 points

    reporting_delay_days = 16

    Filing delay exceeds the configured threshold.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Financial Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. 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).

  2. F2

    Between June 30, 2026 and September 30, 2026, the reporting person acquired 2.229 shares under the MKL 401(k) plan. The information reported herein is based on the plan balance as of September 30, 202…

Original filing · 0001873434-26-000010
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