Marex Group's Simon Van Den Born sells 15,272 shares

The president’s reported prices are weighted averages, and each sale covered transactions within a separate stated price range.

Rhea-AI Filing Summary

Marex Group Ltd President Simon Van Den Born reported selling 15,272 ordinary shares on October 12, 2026, in two transactions: 14,012 shares at a weighted average price of $71.9860 per share and 1,260 shares at $72.6308 per share. The first transaction covered prices from $71.35 to $72.34; the second, $72.355 to $72.98. The sales were effected under a Rule 10b5-1 plan entered into on June 12, 2026.

Insider Trade Summary 10b5-1

Net Seller: 15,272 shares

Net Sell 2 txns

Insider Van Den Born Simon

Role President

Sold 15,272 shs ($1.10M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F2	14,012	$71.986	$1.01M
Sale	Ordinary Shares F1, F3, F4	1,260	$72.6308	$92K

Holdings After Transaction: Ordinary Shares — 1,455,076 shares (Direct)

Footnotes (4)

1. F1. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on June 12, 2026
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $71.35 to $72.34 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 $72.355 to $72.98 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 (i) 20,367 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 272,659 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

Ordinary shares sold: 15,272 shares Ordinary shares sold: 14,012 shares Weighted average sale price: $71.9860 per share +2 more

5 metrics

Ordinary shares sold 15,272 shares Total reported sales on October 12, 2026

Ordinary shares sold 14,012 shares First reported sale on October 12, 2026

Weighted average sale price $71.9860 per share First reported sale on October 12, 2026

Ordinary shares sold 1,260 shares Second reported sale on October 12, 2026

Weighted average sale price $72.6308 per share Second reported sale on October 12, 2026

Key Terms

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

3 terms

Rule 10b5-1 plan regulatory

"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

"shares underlying deferred bonus plan awards previously granted"

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.

How many MRX shares did Simon Van Den Born sell?

Simon Van Den Born reported selling 15,272 ordinary shares on October 12, 2026. This comprised 14,012 shares in one transaction and 1,260 shares in a second transaction.

What prices did the MRX president receive for the shares?

The reported weighted average prices were $71.9860 per share for the 14,012-share transaction and $72.6308 per share for the 1,260-share transaction. The respective transaction price ranges were $71.35 to $72.34 and $72.355 to $72.98.

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

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Available on EDGAR 10/14/2026 - 04:05 PM EDT Accepted by SEC EDGAR 10/14/2026 - 04:05 PM EDT 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^*

Van Den Born Simon

(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)
	President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/12/2026

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	10/12/2026		S(1)		14,012	D	$71.986(2)	1,456,336	D
Ordinary Shares	10/12/2026		S(1)		1,260	D	$72.6308(3)	1,455,076(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 sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on June 12, 2026

2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $71.35 to $72.34 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 $72.355 to $72.98 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 (i) 20,367 shares underlying the Issuer's 2022 Annual Long Term Incentive Plan, and (ii) 272,659 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 Simon van den Born	10/14/2026
	** 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)