Marex officer Paolo Tonucci sells 16,666 shares

Marex Group Ltd (MRX) reported that officer Paolo Tonucci, Chief Strategist and CEO, Capital Markets, sold 16,666 Ordinary Shares on September 14, 2026 in two open-market transactions under a Rule 10b5-1 plan entered into on October 22, 2025.

Rhea-AI Filing Summary

Marex Group Ltd (MRX) reported that officer Paolo Tonucci, Chief Strategist and CEO, Capital Markets, sold 16,666 Ordinary Shares on September 14, 2026 in two open-market transactions under a Rule 10b5-1 plan entered into on October 22, 2025.

The sales were executed at weighted average prices of $70.77 and $71.35 per share across specified price ranges. Remaining holdings include 220,746 shares underlying deferred bonus plan awards, each representing a contingent right to receive one ordinary share upon vesting and settlement.

Insider Trade Summary 10b5-1

Net Seller: 16,666 shares

Net Sell 2 txns

Insider Tonucci Paolo

Role See Remarks

Sold 16,666 shs ($1.18M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F2	13,714	$70.7692	$971K
Sale	Ordinary Shares F1, F3, F4	2,952	$71.3544	$211K

Holdings After Transaction: Ordinary Shares — 1,269,571 shares (Direct)

Footnotes (4)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on October 22, 2025.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $70.21 to $71.2075, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $71.21 to $71.6, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
4. F4. The number of ordinary shares reported herein includes 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

Total shares sold: 16,666 shares First sale size: 13,714 shares First sale weighted average price: $70.7692 per share +4 more

7 metrics

Total shares sold 16,666 shares Ordinary Shares sold by officer on September 14, 2026

First sale size 13,714 shares Ordinary Shares sold in first transaction on September 14, 2026

First sale weighted average price $70.7692 per share Weighted average for 13,714-share sale, price range $70.21–$71.2075

Second sale size 2,952 shares Ordinary Shares sold in second transaction on September 14, 2026

Second sale weighted average price $71.3544 per share Weighted average for 2,952-share sale, price range $71.21–$71.60

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

Rule 10b5-1 plan adoption date October 22, 2025 Date insider entered into the trading plan used for these sales

Key Terms

Rule 10b5-1 plan, weighted average price, deferred bonus plan awards

3 terms

Rule 10b5-1 plan regulatory

"The sales reported ... were effected pursuant to a Rule 10b5-1 plan"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

deferred bonus plan awards financial

"includes 220,746 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MRX report for Paolo Tonucci on September 14, 2026?

MRX reported that officer Paolo Tonucci sold a total of 16,666 Ordinary Shares on September 14, 2026 in two open-market transactions at weighted average prices of $70.77 and $71.35 per share.

Were the MRX insider share sales made under a Rule 10b5-1 plan?

Yes. The sales by Paolo Tonucci were effected under a Rule 10b5-1 plan that he entered into on October 22, 2025, according to the transaction footnotes.

How many MRX shares did the insider sell in each transaction and at what prices?

Paolo Tonucci sold 13,714 Ordinary Shares at a weighted average price of $70.7692, and 2,952 Ordinary Shares at a weighted average price of $71.3544, all on September 14, 2026.

What price ranges applied to the MRX insider’s weighted average sale prices?

For the 13,714-share sale, prices ranged from $70.21 to $71.2075. For the 2,952-share sale, prices ranged from $71.21 to $71.60, with each transaction’s reported price being a weighted average across those ranges.

What deferred bonus-related MRX share interests does the insider still have?

The insider’s reported ordinary share position includes 220,746 shares underlying deferred bonus plan awards. Each award represents a contingent right to receive one MRX ordinary share upon vesting and settlement of the applicable award.

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

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Available on EDGAR 09/16/2026 - 04:05 PM Accepted by SEC EDGAR 09/16/2026 - 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).

X

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)
09/14/2026

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	09/14/2026		S(1)		13,714	D	$70.7692(2)	1,272,523	D
Ordinary Shares	09/14/2026		S(1)		2,952	D	$71.3544(3)	1,269,571(4)	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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on October 22, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $70.21 to $71.2075, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $71.21 to $71.6, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The number of ordinary shares reported herein includes 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	09/16/2026
	** 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)