Marex (MRX) president has 43,712 shares withheld for tax obligations

Rhea-AI Filing Summary

Marex Group plc President Simon Van Den Born reported a tax-related share disposition tied to deferred bonus awards. On the vesting of previously granted deferred bonus plan awards, 43,712 ordinary shares were withheld to satisfy his tax withholding obligation, using a reference price of $54.45 per share, the closing price on May 21, 2026. After this withholding, he beneficially owns 1,465,252 ordinary shares, which the filing notes includes 272,659 shares underlying deferred bonus plan awards that represent contingent rights to receive one ordinary share per award upon future vesting and settlement.

Insider Trade Summary

Net Seller: 43,712 shares

Net Sell 1 txn

Insider Van Den Born Simon

Role President

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Ordinary Shares	43,712	$54.45	$2.38M

Holdings After Transaction: Ordinary Shares — 1,465,252 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 certain previously reported shares underlying deferred bonus plan awards.
2. F2. The price reported represents the closing price of the Issuer's ordinary shares on the Nasdaq Stock Market LLC on May 21, 2026.
3. F3. The number of ordinary shares reported herein includes 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: 43,712 shares Reference share price: $54.45 per share Shares owned after transaction: 1,465,252 shares +1 more

4 metrics

Shares withheld for tax 43,712 shares Tax-withholding disposition on vesting of deferred bonus awards

Reference share price $54.45 per share Closing price on May 21, 2026 used for tax withholding

Shares owned after transaction 1,465,252 shares Total Marex ordinary shares beneficially owned after withholding

Deferred bonus plan underlying shares 272,659 shares Contingent rights to receive one ordinary share per award upon vesting

Key Terms

tax withholding obligation, deferred bonus plan awards, contingent right, vesting

4 terms

tax withholding obligation financial

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

deferred bonus plan awards financial

"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"

vesting financial

"in connection with the vesting of certain previously reported shares underlying"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 05/27/2026 - 04:05 PM Learn about SEC filing dates

FAQ

What insider transaction did Marex Group (MRX) report for Simon Van Den Born?

Marex Group reported that President Simon Van Den Born had 43,712 ordinary shares withheld to cover tax obligations from vesting deferred bonus awards. This is a tax-withholding disposition, not an open-market share sale, and reflects routine handling of equity-based compensation.

Was the Marex (MRX) insider transaction an open-market sale of shares?

No, the Marex transaction was not an open-market sale. The 43,712 shares were withheld by the company to satisfy tax obligations on vesting deferred bonus plan awards, a common administrative step with equity compensation rather than a discretionary sale in the market.

How many Marex (MRX) shares does Simon Van Den Born hold after the Form 4 transaction?

Following the tax-withholding disposition, Simon Van Den Born beneficially owns 1,465,252 ordinary shares of Marex Group. This total includes 272,659 shares tied to deferred bonus plan awards, each representing a contingent right to receive one ordinary share upon vesting and settlement.

What price per share was used in the Marex (MRX) tax-withholding entry?

The filing reports a price of $54.45 per ordinary share, which is identified as the Nasdaq closing price of Marex Group’s ordinary shares on May 21, 2026. This price is used as the reference value for the 43,712 shares withheld for tax obligations.

What are the deferred bonus plan awards mentioned in the Marex (MRX) Form 4?

Deferred bonus plan awards are equity-based incentives that vest over time. The filing notes 272,659 shares underlying such awards for Simon Van Den Born, with each award giving a contingent right to receive one Marex ordinary share when the award vests and is settled.

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 PLC, 155 BISHOPSGATE

(Street)

LONDON UNITED KINGDOM EC2M 3TQ

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Marex Group plc [ 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)
05/22/2026

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	05/22/2026		F		43,712(1)	D	$54.45(2)	1,465,252(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 certain previously reported shares underlying deferred bonus plan awards.

2. The price reported represents the closing price of the Issuer's ordinary shares on the Nasdaq Stock Market LLC on May 21, 2026.

3. The number of ordinary shares reported herein includes 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	05/27/2026
	** 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)