Markel CFO adds shares via employee stock plan

Q: What did Markel Group (MKL) CFO Brian J. Costanzo report in this Form 4?

Brian J. Costanzo reported small increases in his Markel Group common stock holdings. He acquired 2.1642 shares via the 2020 Employee Stock Purchase Plan and added 3.269 shares in the MKL 401(k) plan during the quarter ended June 30, 2026.

Q: How many MKL shares did the CFO acquire through the MKL 2020 Employee Stock Purchase Plan?

He acquired 2.1642 MKL common shares at $1,617.19 per share through the qualified component of the MKL 2020 Employee Stock Purchase Plan. This transaction was reported as exempt under Exchange Act Rule 16b-3(c).

Q: How many Markel Group (MKL) shares does the CFO hold in the MKL 401(k) plan?

As of June 30, 2026, Costanzo holds 229.5920 MKL shares indirectly through the MKL 401(k) plan. Between March 31 and June 30, 2026, he acquired 3.269 shares within this retirement plan, based on plan balance information.

Q: What is the role of Exchange Act Rule 16b-3(c) in this Markel (MKL) insider transaction?

The ESPP transaction is described as exempt under Exchange Act Rule 16b-3(c). This rule provides an exemption for certain equity grants or acquisitions made under approved employee benefit plans, so the reported purchase occurred within that exempt employee-plan framework.

Markel Group Inc. Chief Financial Officer Brian J. Costanzo reported modest increases in his equity holdings.

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Rhea-AI Filing Summary

Markel Group Inc. Chief Financial Officer Brian J. Costanzo reported modest increases in his equity holdings. On June 30, 2026 he acquired 2.1642 shares of common stock at $1,617.19 per share through the qualified component of the MKL 2020 Employee Stock Purchase Plan, bringing his direct holdings to 1,632.2394 shares. Between March 31 and June 30, 2026 he also acquired 3.269 shares in the MKL 401(k) plan, for an indirect balance of 229.5920 shares as of June 30, 2026.

Insider Trade Summary

Other: 2.1642 shares

Other 2 txns

Insider Costanzo Brian J.

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Other	Common Stock ^F1	2.1642	$1,617.19	$3K
holding	Common Stock ^F2	--	--	--

Holdings After Transaction: Common Stock — 1,632.2394 shares (Direct); Common Stock — 229.592 shares (Indirect, 401(k) Plan)

Footnotes (2)

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).
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.

Key Figures

ESPP shares acquired: 2.1642 shares ESPP purchase price: $1,617.19 per share Direct holdings after transaction: 1,632.2394 shares +2 more

5 metrics

ESPP shares acquired 2.1642 shares Common stock acquired on June 30, 2026 under MKL 2020 Employee Stock Purchase Plan

ESPP purchase price $1,617.19 per share Price for June 30, 2026 MKL Employee Stock Purchase Plan acquisition

Direct holdings after transaction 1,632.2394 shares Direct Markel Group common stock owned by Brian J. Costanzo after June 30, 2026

Indirect 401(k) holdings 229.5920 shares Common stock held through MKL 401(k) plan as of June 30, 2026

401(k) shares acquired in quarter 3.269 shares Shares acquired between March 31, 2026 and June 30, 2026 under MKL 401(k) plan

Key Terms

MKL 2020 Employee Stock Purchase Plan, Exchange Act Rule 16b-3(c), 401(k) plan

3 terms

MKL 2020 Employee Stock Purchase Plan financial

"Shares acquired under the qualified component of the MKL 2020 Employee Stock Purchase Plan"

Exchange Act Rule 16b-3(c) regulatory

"in a transaction exempt under Exchange Act Rule 16b-3(c)."

401(k) plan financial

"the reporting person acquired 3.269 shares under the MKL 401(k) plan."

A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Markel Group (MKL) CFO Brian J. Costanzo report in this Form 4?

Brian J. Costanzo reported small increases in his Markel Group common stock holdings. He acquired 2.1642 shares via the 2020 Employee Stock Purchase Plan and added 3.269 shares in the MKL 401(k) plan during the quarter ended June 30, 2026.

How many MKL shares did the CFO acquire through the MKL 2020 Employee Stock Purchase Plan?

He acquired 2.1642 MKL common shares at $1,617.19 per share through the qualified component of the MKL 2020 Employee Stock Purchase Plan. This transaction was reported as exempt under Exchange Act Rule 16b-3(c).

What are Brian J. Costanzo’s direct Markel Group (MKL) shareholdings after June 30, 2026?

After the June 30, 2026 transaction, Brian J. Costanzo directly owns 1,632.2394 shares of Markel Group common stock. This total reflects the addition of 2.1642 shares acquired through the MKL 2020 Employee Stock Purchase Plan.

How many Markel Group (MKL) shares does the CFO hold in the MKL 401(k) plan?

As of June 30, 2026, Costanzo holds 229.5920 MKL shares indirectly through the MKL 401(k) plan. Between March 31 and June 30, 2026, he acquired 3.269 shares within this retirement plan, based on plan balance information.

What is the role of Exchange Act Rule 16b-3(c) in this Markel (MKL) insider transaction?

The ESPP transaction is described as exempt under Exchange Act Rule 16b-3(c). This rule provides an exemption for certain equity grants or acquisitions made under approved employee benefit plans, so the reported purchase occurred within that exempt employee-plan framework.

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Accepted by SEC EDGAR 07/16/2026 - 04:55 PM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Costanzo Brian J.

(Last)

(First)

(Middle)

C/O MARKEL GROUP INC.

4521 HIGHWOODS PARKWAY

(Street)

GLEN ALLEN

VIRGINIA

23060

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MARKEL GROUP INC. [ MKL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/30/2026		J	V	2.1642⁽¹⁾	A	$1,617.19	1,632.2394	D
Common Stock								229.592	I	401(k) Plan⁽²⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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. 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.

Remarks:

	/s/ Karen O. Earls, Attorney-in-fact for Brian J. Costanzo	07/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR