Marex executive has 18,293 shares withheld for tax

MRX’s Chief Strategist and CEO, Capital Markets had shares withheld to cover taxes on vested equity awards, leaving over 1.28 million ordinary shares reported as held.

Rhea-AI Filing Summary

Marex Group Ltd (MRX) reported that Chief Strategist and CEO, Capital Markets Paolo Tonucci had 18,293 ordinary shares withheld on September 7, 2026 to satisfy a tax withholding obligation related to the vesting of equity awards under the 2022 Annual Long Term Incentive Plan.

The withholding price used was $78.27 per share, equal to the September 4, 2026 Nasdaq closing price for Marex ordinary shares. After this transaction, Tonucci directly holds 1,286,237 ordinary shares, including 20,628 shares underlying the 2022 Annual Long Term Incentive Plan and 220,746 shares underlying deferred bonus plan awards, each award representing a contingent right to receive one ordinary share upon vesting and settlement.

Insider Trade Summary

Tax Withholding: 18,293 shares

Tax Withholding 1 txn

Insider Tonucci Paolo

Role See Remarks

Type	Security	Shares	Price	Value
Tax Withholding	Ordinary Shares F1, F2, F3	18,293	$78.27	$1.43M

Holdings After Transaction: Ordinary Shares — 1,286,237 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) 20,628 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 220,746 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 taxes: 18,293 shares Withholding price per share: $78.27 per share Shares held after transaction: 1,286,237 shares +2 more

5 metrics

Shares withheld for taxes 18,293 shares Ordinary shares withheld September 7, 2026 to satisfy tax withholding obligation

Withholding price per share $78.27 per share Closing price of Marex ordinary shares on Nasdaq on September 4, 2026

Shares held after transaction 1,286,237 shares Direct ordinary share holdings of Paolo Tonucci following the reported transaction

2022 LTIP underlying shares 20,628 shares Shares underlying Marex’s 2022 Annual Long Term Incentive Plan included in reported holdings

Deferred bonus plan underlying shares 220,746 shares Shares underlying deferred bonus plan awards included 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

"in connection with the vesting of shares underlying the Issuer's 2022 Annual Long Term Incentive Plan"

deferred bonus plan awards financial

"220,746 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 transaction did MRX insider Paolo Tonucci report on this Form 4?

Paolo Tonucci reported that 18,293 ordinary shares of Marex Group Ltd were withheld to satisfy tax withholding obligations arising from vesting under the 2022 Annual Long Term Incentive Plan on September 7, 2026.

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

The withholding used a price of $78.27 per share, which the filing states is the closing price of Marex Group Ltd ordinary shares on the Nasdaq Stock Market on September 4, 2026.

How many MRX shares does Paolo Tonucci hold after the reported transaction?

After the tax-withholding transaction, Paolo Tonucci is reported to directly hold 1,286,237 ordinary shares of Marex Group Ltd, including shares underlying incentive and deferred bonus awards.

Does the MRX Form 4 indicate the transaction was under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as being under a plan, and there is no footnote stating that the tax-withholding transaction occurred pursuant to a Rule 10b5-1 trading plan.

What MRX equity awards are referenced in the Form 4 footnotes?

The footnotes state the reported holdings include 20,628 shares underlying the 2022 Annual Long Term Incentive Plan and 220,746 shares underlying deferred bonus plan awards, each award being a contingent right to receive one ordinary share upon vesting and settlement.

What is Paolo Tonucci’s role at Marex Group Ltd (MRX)?

The Form 4 identifies Paolo Tonucci as Chief Strategist and CEO, Capital Markets of Marex Group Ltd, indicating he is an officer of the company and the reporting person for this insider transaction.

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^*

Tonucci Paolo

(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)
	See Remarks

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		18,293(1)	D	$78.27(2)	1,286,237(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) 20,628 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 220,746 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.

Remarks:

Chief Strategist and CEO, Capital Markets

	/s/ Scott Linsley as Attorney-in-Fact, for Paolo Tonucci	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)