Marex CEO has 36,587 shares withheld for tax

Rhea-AI Filing Summary

Marex Group Ltd (MRX) reported that Chief Executive Officer and director Ian T. Lowitt had 36,587 ordinary shares withheld on September 7, 2026 to satisfy a tax withholding obligation arising from the vesting of awards under the 2022 Annual Long Term Incentive Plan. The withholding was valued using a share price of $78.27, which reflects the closing price of Marex ordinary shares on September 4, 2026. Following this tax-related withholding, Lowitt holds 2,835,472 ordinary shares directly, including 41,256 shares underlying the 2022 Annual Long Term Incentive Plan and 194,411 shares underlying deferred bonus plan awards that each represent a contingent right to receive one ordinary share upon vesting and settlement. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Tax Withholding: 36,587 shares

Tax Withholding 1 txn

Insider Lowitt Ian T

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Tax Withholding	Ordinary Shares F1, F2, F3	36,587	$78.27	$2.86M

Holdings After Transaction: Ordinary Shares — 2,835,472 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) 41,256 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 194,411 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: 36,587 shares Reference share price: $78.27 per share Shares held after transaction: 2,835,472 shares +2 more

5 metrics

Shares withheld for tax 36,587 shares Ordinary shares withheld on September 7, 2026 to satisfy tax withholding obligation on vesting

Reference share price $78.27 per share Closing price of Marex ordinary shares on Nasdaq on September 4, 2026 used for the withholding valuation

Shares held after transaction 2,835,472 shares Total ordinary shares directly held by Ian T. Lowitt following the September 7, 2026 transaction

2022 LTIP underlying shares 41,256 shares Shares underlying Marex’s 2022 Annual Long Term Incentive Plan included in reported holdings

Deferred bonus plan underlying shares 194,411 shares Shares underlying deferred bonus plan awards included in Ian T. Lowitt’s 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

"vesting of shares 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 CEO Ian T. Lowitt report on September 7, 2026?

Ian T. Lowitt reported that 36,587 ordinary shares were withheld on September 7, 2026 to satisfy a tax withholding obligation related to vesting awards under Marex Group Ltd’s 2022 Annual Long Term Incentive Plan.

Was the Marex Group (MRX) Form 4 transaction an open-market sale?

No. The Form 4 states the transaction was a payment of tax liability by delivering or withholding securities, meaning 36,587 shares were withheld for taxes upon vesting rather than sold in an open-market transaction.

What share price was used for the MRX tax-withholding transaction?

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

How many Marex Group (MRX) shares does Ian T. Lowitt hold after the reported transaction?

After the tax-withholding transaction, Ian T. Lowitt directly holds 2,835,472 ordinary shares of Marex Group Ltd, including both currently held shares and specified incentive and deferred bonus awards.

What unvested or contingent MRX awards are included in Ian T. Lowitt’s reported holdings?

His reported holdings include 41,256 shares underlying Marex’s 2022 Annual Long Term Incentive Plan and 194,411 shares underlying deferred bonus plan awards, each representing 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 Form 4 indicates the Rule 10b5-1 checkbox is not marked, so there is no Rule 10b5-1 trading plan reported in connection with this tax-withholding transaction.

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

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Available on EDGAR 09/09/2026 - 04:05 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^*

Lowitt Ian T

(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)

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

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		36,587(1)	D	$78.27(2)	2,835,472(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) 41,256 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 194,411 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 Ian T. Lowitt	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)