Marex Group (MRX) president trims stake in 13,265-share 10b5-1 sale

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Marex Group plc President Simon Van Den Born reported selling a total of 13,265 Ordinary Shares on April 20, 2026 in two open-market transactions. One sale covered 12,624 shares at a weighted average price of $50.9165 per share, and the other covered 641 shares at a weighted average price of $51.7098 per share.

The transactions were carried out under a pre-arranged Rule 10b5-1 trading plan that he entered into on December 12, 2025. After these sales, each line item shows he continued to hold more than 1.5 million Ordinary Shares directly. His reported holdings include 383,741 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: 13,265 shares ($675,916)

Net Sell 2 txns

Insider Van Den Born Simon

Role President

Sold 13,265 shs ($676K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	12,624	$50.9165	$643K
Sale	Ordinary Shares	641	$51.7098	$33K

Holdings After Transaction: Ordinary Shares — 1,509,605 shares (Direct, null)

Footnotes (1)

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on December 12, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $50.51 to $51.34 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. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $51.56 to $52.115 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. The number of ordinary shares reported herein includes 383,741 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 sold (larger block): 12,624 shares Shares sold (smaller block): 641 shares Total shares sold: 13,265 shares +3 more

6 metrics

Shares sold (larger block) 12,624 shares Open-market sale of Ordinary Shares on April 20, 2026 at $50.9165 weighted average

Shares sold (smaller block) 641 shares Open-market sale of Ordinary Shares on April 20, 2026 at $51.7098 weighted average

Total shares sold 13,265 shares Net Ordinary Shares sold according to transaction summary for April 20, 2026

Holdings after transaction (line 1) 1,509,605 shares Ordinary Shares directly owned after one reported sale transaction

Holdings after transaction (line 2) 1,508,964 shares Ordinary Shares directly owned after the other reported sale transaction

Deferred bonus plan awards 383,741 shares Ordinary Shares underlying deferred bonus plan awards, one share per award upon vesting

Key Terms

Rule 10b5-1 plan, weighted average price, Ordinary Shares, deferred bonus plan awards, +1 more

5 terms

Rule 10b5-1 plan financial

"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into..."

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. These shares were sold in transactions..."

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.

Ordinary Shares financial

"The number of ordinary shares reported herein includes 383,741 shares underlying deferred bonus plan awards..."

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

deferred bonus plan awards financial

"The number of ordinary shares reported herein includes 383,741 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.

contingent right financial

"Each award represents a contingent right to receive one (1) ordinary share of the Issuer upon vesting..."

Form 4 Insider Transactions: What Each Field Means →

04/22/2026 - 04:05 PM

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^*

Van Den Born Simon

(Last)

(First)

(Middle)

C/O MAREX GROUP PLC, 155 BISHOPSGATE

(Street)

LONDON

UNITED KINGDOM

EC2M 3TQ

(City)

(State)

(Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Marex Group plc [ 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)
04/20/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	04/20/2026		S⁽¹⁾		12,624	D	$50.9165⁽²⁾	1,509,605	D
Ordinary Shares	04/20/2026		S⁽¹⁾		641	D	$51.7098⁽³⁾	1,508,964⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 December 12, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $50.51 to $51.34 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 $51.56 to $52.115 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 383,741 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	04/22/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Marex Group (MRX) report for Simon Van Den Born?

Marex Group reported that President Simon Van Den Born sold 13,265 Ordinary Shares. The sales occurred in two open-market transactions on April 20, 2026, as disclosed in a Form 4 insider filing with detailed share counts and prices.

At what prices did Marex Group (MRX) president sell his Ordinary Shares?

He sold 12,624 Ordinary Shares at a weighted average price of $50.9165 and 641 Ordinary Shares at a weighted average price of $51.7098. Footnotes note these are averages across multiple trades within stated price ranges.

Was the Marex Group (MRX) insider sale by Simon Van Den Born pre-planned?

Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan entered into on December 12, 2025. Such plans pre-schedule trades, making the timing more routine and less discretionary.

How many Marex Group (MRX) shares does the president hold after the reported sales?

Each transaction line shows Simon Van Den Born continued to hold more than 1.5 million Ordinary Shares directly after the April 20, 2026 sales. This reported balance includes shares tied to deferred bonus plan awards.

What are the deferred bonus plan awards mentioned in the Marex Group (MRX) filing?

The filing notes 383,741 Ordinary Shares underlying deferred bonus plan awards previously granted to Simon Van Den Born. Each award represents a contingent right to receive one Ordinary Share upon vesting and settlement of the applicable award.

How many Marex Group (MRX) shares did the president sell in total on April 20, 2026?

According to the transaction summary, Simon Van Den Born sold a net total of 13,265 Ordinary Shares. This figure aggregates the two reported open-market sale transactions disclosed for that date in the Form 4.