Marex president has 13K shares withheld for tax

Marex Group’s president reported a routine tax-withholding share disposition tied to vesting of long-term incentive and deferred bonus awards.

Rhea-AI Filing Summary

Marex Group Ltd (MRX) reported that President Simon Van Den Born had 13,215 Ordinary Shares withheld on September 7, 2026 to satisfy a tax withholding obligation arising from vesting under the 2022 Annual Long Term Incentive Plan, valued at the September 4, 2026 closing price of $78.27 per share. Following this tax-withholding disposition, he directly holds 1,485,619 Ordinary Shares, including 20,367 shares underlying the 2022 Annual Long Term Incentive Plan and 272,659 shares underlying deferred bonus plan awards, each award representing a contingent right to receive one share upon vesting and settlement.

Insider Trade Summary

Tax Withholding: 13,215 shares

Tax Withholding 1 txn

Insider Van Den Born Simon

Role President

Type	Security	Shares	Price	Value
Tax Withholding	Ordinary Shares F1, F2, F3	13,215	$78.27	$1.03M

Holdings After Transaction: Ordinary Shares — 1,485,619 shares (Direct)

Footnotes (3)

1. F1. Represents the number of ordinary shares withheld to satisfy the tax withholding obligation in connection with the vesting of shares underlying the Issuer's 2022 Annual Long Term Incentive Plan.
2. F2. The price reported represents the closing price of the Issuer's ordinary shares on the Nasdaq Stock Market LLC on September 4, 2026.
3. F3. The number of ordinary shares reported herein includes (i) 20,367 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 272,659 shares underlying deferred bonus plan awards previously granted to the Reporting Person. Each award represents a contingent right to receive one (1) ordinary share of the Issuer upon vesting and settlement of the applicable award.

Key Figures

Shares withheld for tax: 13,215 shares Reference share price: $78.27 per share Direct holdings after transaction: 1,485,619 shares +2 more

5 metrics

Shares withheld for tax 13,215 shares Ordinary Shares withheld on September 7, 2026 to satisfy tax withholding obligation

Reference share price $78.27 per share Closing price on Nasdaq for Marex Group Ordinary Shares on September 4, 2026, used for tax-withholding valuation

Direct holdings after transaction 1,485,619 shares Total Ordinary Shares directly held by Simon Van Den Born following the tax-withholding disposition

Shares underlying 2022 LTIP 20,367 shares Ordinary Shares underlying Marex Group’s 2022 Annual Long Term Incentive Plan included in reported holdings

Deferred bonus plan underlying shares 272,659 shares Ordinary Shares underlying deferred bonus plan awards included as contingent rights in reported holdings

Key Terms

tax withholding obligation, 2022 Annual Long Term Incentive Plan, deferred bonus plan awards, contingent right

4 terms

tax withholding obligation financial

"shares withheld to satisfy the tax withholding obligation in connection with the vesting"

2022 Annual Long Term Incentive Plan financial

"underlying the Issuer's 2022 Annual Long Term Incentive Plan"

deferred bonus plan awards financial

"shares underlying deferred bonus plan awards previously granted to the Reporting Person"

Deferred bonus plan awards are payments promised to employees or executives that are earned now but paid out later, often only if certain performance goals are met or the employee remains with the company. For investors, they matter because they influence management’s incentives and company expenses over time—like a delayed paycheck that encourages someone to stay and meet targets—and can affect future cash needs, reported compensation costs, and potential share dilution.

contingent right financial

"Each award represents a contingent right to receive one (1) ordinary share"

FAQ

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

What insider transaction did MRX’s President Simon Van Den Born report?

He reported a tax-withholding disposition of 13,215 Ordinary Shares on September 7, 2026. The shares were withheld to satisfy tax obligations triggered by vesting under Marex Group’s 2022 Annual Long Term Incentive Plan.

At what price were the withheld MRX shares valued in this Form 4?

The withheld 13,215 Ordinary Shares were valued at $78.27 per share, which represents the closing price of Marex Group’s Ordinary Shares on the Nasdaq Stock Market LLC on September 4, 2026, as disclosed in the filing.

How many MRX shares does Simon Van Den Born hold after this transaction?

After the reported tax-withholding disposition, Simon Van Den Born directly holds 1,485,619 Ordinary Shares of Marex Group Ltd. This total includes both currently held shares and shares underlying certain incentive and deferred bonus awards described in the filing.

What MRX awards are included in the reported post-transaction share count?

The reported 1,485,619 Ordinary Shares include (i) 20,367 shares underlying Marex Group’s 2022 Annual Long Term Incentive Plan and (ii) 272,659 shares underlying deferred bonus plan awards, each award being a contingent right to receive one Ordinary Share upon vesting and settlement.

Was the MRX insider transaction made under a Rule 10b5-1 trading plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not marked, and the footnotes describe the event as shares withheld to satisfy tax withholding obligations rather than sales under a pre-arranged trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/09/2026 - 04:06 PM Accepted by SEC EDGAR 09/09/2026 - 04:05 PM Learn about SEC filing dates

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^*

Van Den Born Simon

(Last) (First) (Middle)

C/O MAREX GROUP LIMITED, 155 BISHOPSGATE

(Street)

LONDON EC2M 3TQ

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Marex Group Ltd [ MRX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/07/2026

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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	09/07/2026		F		13,215(1)	D	$78.27(2)	1,485,619(3)	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the number of ordinary shares withheld to satisfy the tax withholding obligation in connection with the vesting of shares underlying the Issuer's 2022 Annual Long Term Incentive Plan.

2. The price reported represents the closing price of the Issuer's ordinary shares on the Nasdaq Stock Market LLC on September 4, 2026.

3. The number of ordinary shares reported herein includes (i) 20,367 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 272,659 shares underlying deferred bonus plan awards previously granted to the Reporting Person. Each award represents a contingent right to receive one (1) ordinary share of the Issuer upon vesting and settlement of the applicable award.

	/s/ Scott Linsley as Attorney-in-Fact, for Simon van den Born	09/09/2026
	** 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)