Marex Group (MRX) officer discloses 1,380,023-share stake on Form 3

Rhea-AI Filing Summary

Marex Group plc officer Paolo Tonucci has filed an initial ownership report showing a direct holding of 1,380,023 ordinary shares. This total includes 286,871 shares underlying deferred bonus plan awards, each representing a right to receive one ordinary share upon vesting and settlement of the respective award.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Tonucci Paolo

Role See Remarks

Type	Security	Shares	Price	Value
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Ordinary Shares — 1,380,023 shares (Direct)

Footnotes (1)

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Understanding Insider Trading Forms →

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^*

Tonucci Paolo

(Last) (First) (Middle)

C/O MAREX GROUP PLC

155 BISHOPSGATE

(Street)

LONDON EC2M 3TQ

(City) (State) (Zip)

UNITED STATES

(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)

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

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	1,380,023(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 286,871 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 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 Paolo Tonucci’s Form 3 for MRX disclose?

The Form 3 discloses that officer Paolo Tonucci beneficially owns 1,380,023 Marex Group ordinary shares. This figure includes both currently held shares and shares underlying previously granted deferred bonus plan awards that may convert into ordinary shares when they vest.

How many Marex Group (MRX) shares does Paolo Tonucci report owning?

He reports beneficial ownership of 1,380,023 ordinary shares of Marex Group plc. This number reflects his direct holdings plus 286,871 shares that are tied to deferred bonus plan awards, which can become ordinary shares after vesting and settlement conditions are met.

What are the 286,871 deferred bonus plan awards in the MRX Form 3?

The 286,871 units are deferred bonus plan awards previously granted to Tonucci. Each award represents a contingent right to receive one Marex Group ordinary share upon vesting and settlement, so they are counted within his reported 1,380,023-share beneficial ownership total.

Does Paolo Tonucci’s MRX Form 3 show any recent share purchases or sales?

The Form 3 functions as an initial statement of beneficial ownership and lists Tonucci’s existing stake in Marex Group. It records 1,380,023 ordinary shares, including deferred awards, but does not identify any specific buy or sell transactions in this disclosure.

Is all of Paolo Tonucci’s MRX ownership held directly in his name?

Yes. The reported 1,380,023 Marex Group ordinary shares are listed as directly owned by Tonucci. This total includes 286,871 shares underlying deferred bonus plan awards, which are also attributed to him as contingent, share-settled compensation once vesting requirements are satisfied.