Marex Group (MRX) director reports 24,095 ordinary shares held

Rhea-AI Filing Summary

Marex Group plc director files initial ownership report showing beneficial ownership of 24,095 Ordinary Shares. This total includes 2,787 shares underlying restricted share awards previously granted, each award representing a contingent right to receive one Ordinary Share upon vesting and settlement.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Schweinitz Konstantin Graf von

(Last) (First) (Middle)

C/O MAREX GROUP PLC

155 BISHOPSGATE

(Street)

LONDON UNITED KINGDOM EC2M 3TQ

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Marex Group plc [ MRX ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

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

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

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	24,095(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The number of ordinary shares reported herein includes 2,787 shares underlying restricted share 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:

Exhibit 24 - Power of Attorney

	/s/ Scott Linsley, as Attorney-in-Fact	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does the Marex Group (MRX) Form 3 filing show?

The Form 3 shows director Schweinitz Konstantin Graf von beneficially owns 24,095 Ordinary Shares of Marex Group plc, including restricted share awards that may convert into shares upon vesting and settlement.

How many Marex Group (MRX) shares does the director report owning?

The director reports beneficial ownership of 24,095 Ordinary Shares. This figure reflects both currently held shares and restricted share awards that can convert into shares when vesting conditions are met.

What are the 2,787 restricted share awards in the Marex (MRX) filing?

The filing states 2,787 shares are underlying restricted share awards. Each award represents a contingent right to receive one Ordinary Share upon vesting and settlement of the applicable award.

Is the Marex Group (MRX) Form 3 a buy or sell transaction?

The Form 3 is an initial ownership statement, not a buy or sell report. It discloses the director’s existing beneficial ownership, including restricted share awards, rather than recording a new market transaction.

Who is the reporting person in the Marex Group (MRX) Form 3?

The reporting person is Schweinitz Konstantin Graf von, identified as a director of Marex Group plc. The Form 3 discloses his beneficial ownership position in the company’s Ordinary Shares.