Marex Group (NASDAQ: MRX) CFO reports 3,358-share tax withholding event

Rhea-AI Filing Summary

Marex Group plc Chief Financial Officer Rob Irvin reported an automatic tax-related share disposition tied to deferred bonus awards. On the vesting of previously reported deferred bonus plan awards, 3,358 ordinary shares were withheld to satisfy the associated tax withholding obligation, using a reference price of $54.45 per share.

After this withholding, Irvin holds 34,746 ordinary shares directly, including 25,300 shares underlying deferred bonus plan awards that represent contingent rights to receive one ordinary share each upon future vesting and settlement.

Insider Trade Summary

Net Seller: 3,358 shares

Net Sell 1 txn

Insider Irvin Rob

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Ordinary Shares	3,358	$54.45	$183K

Holdings After Transaction: Ordinary Shares — 34,746 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 25,300 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: 3,358 shares Reference share price: $54.45 per share Shares held after transaction: 34,746 shares +1 more

4 metrics

Shares withheld for tax 3,358 shares Ordinary shares withheld to satisfy tax withholding obligation on vesting

Reference share price $54.45 per share Closing price of ordinary shares on Nasdaq on May 21, 2026

Shares held after transaction 34,746 shares Ordinary shares reported as owned following the tax-withholding disposition

Deferred bonus underlying shares 25,300 shares Shares underlying deferred bonus plan awards included in reported holdings

Key Terms

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

4 terms

tax withholding obligation financial

"Represents the number of ordinary shares withheld to satisfy the tax withholding obligation in connection with the vesting"

deferred bonus plan awards financial

"vesting of certain previously reported shares underlying deferred bonus plan awards"

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.

vesting financial

"withheld to satisfy the tax withholding obligation in connection with the vesting of certain previously reported shares"

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.

contingent right financial

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

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) disclose for its CFO?

Marex Group disclosed that CFO Rob Irvin had 3,358 ordinary shares withheld to cover tax obligations on vesting deferred bonus plan awards. This was a tax-withholding disposition, not an open-market purchase or sale, and reflects routine compensation-related activity.

How many Marex Group (MRX) shares were withheld for taxes in this Form 4?

The filing shows 3,358 ordinary shares were withheld to satisfy tax withholding obligations. The price reference used was $54.45 per share, corresponding to the closing price of Marex’s ordinary shares on Nasdaq on May 21, 2026, as noted in the footnotes.

How many Marex Group (MRX) shares does the CFO hold after this transaction?

Following the tax-withholding disposition, CFO Rob Irvin reports ownership of 34,746 ordinary shares. This figure includes 25,300 shares underlying deferred bonus plan awards, which are contingent rights to receive one ordinary share each upon future vesting and settlement events.

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

Deferred bonus plan awards are equity-based compensation where each award represents a contingent right to receive one ordinary share upon vesting and settlement. In this filing, 25,300 such underlying shares are included in the CFO’s reported holdings after the tax-related share withholding.

Was the Marex (MRX) CFO’s Form 4 transaction an open-market sale or purchase?

The transaction was not an open-market trade. It was coded as an F transaction, meaning shares were delivered to satisfy a tax liability. Specifically, 3,358 ordinary shares were withheld automatically in connection with the vesting of previously reported deferred bonus plan awards.

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^*

Irvin Rob

(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)

X	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)
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		3,358(1)	D	$54.45(2)	34,746(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 25,300 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 Rob Irvin	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)