Marex officer may sell $5.3M in company stock

An officer of Marex Group Ltd has filed a Rule 144 notice to sell up to 75,455 compensation-related shares under a Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Marex Group Ltd (MRX) received a Form 144 notice indicating that officer Simon Van Den Born may sell up to 75,455 shares of common stock through Goldman Sachs & Co. LLC under Rule 144. The shares relate to equity compensation awards.

The notice discloses that the shares were acquired as Restricted Stock Units granted on May 4, 2023, March 11, 2025, and May 17, 2024, all from the issuer as compensation. The sales are to be made pursuant to a selling plan dated June 12, 2026 intended to comply with Rule 10b5-1(c).

Key Figures

Shares proposed for sale: 75,455 shares Aggregate market value: $5,343,723.10 Shares outstanding: 72,937,470 shares +3 more

6 metrics

Shares proposed for sale 75,455 shares Maximum number of Marex Group Ltd common shares covered by the Form 144 notice

Aggregate market value $5,343,723.10 Aggregate market value of the shares covered by the Form 144 notice

Shares outstanding 72,937,470 shares Marex Group Ltd common shares outstanding as listed in the Form 144

RSU-related shares from 2025 grant 30,543 shares Shares to be sold acquired as compensation from Restricted Stock Units dated March 11, 2025

RSU-related shares from 2023 grant 35,982 shares Shares to be sold acquired as compensation from Restricted Stock Units dated May 4, 2023

RSU-related shares from 2024 grant 8,930 shares Shares to be sold acquired as compensation from Restricted Stock Units dated May 17, 2024

Key Terms

Rule 144, Restricted Stock Units, Rule 10b5-1(c)

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"Acquired as compensation -- Restricted Stock Units | The Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Rule 10b5-1(c) regulatory

"a selling plan dated 12 June 2026 that is intended to comply with Rule 10b5-1(c)."

Rule 10b5-1(c) is an SEC guideline that lets company insiders set up a written, pre-planned schedule to buy or sell their company stock when they are not in possession of material, nonpublic information. For investors, it matters because such plans can reduce the appearance of insider trading by separating decisions from inside knowledge—like putting your trades on autopilot—while also requiring scrutiny since pre-planned trades can still affect market confidence and share value.

FAQ

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

What does this Form 144 filing mean for Marex Group Ltd (MRX)?

The filing states that an officer, Simon Van Den Born, has notified of a potential sale of up to 75,455 shares of common stock under Rule 144. It is a required disclosure of planned resales by an affiliate, not a company-issued offering.

How many Marex Group Ltd (MRX) shares are covered by this Form 144?

The notice covers a proposed sale of 75,455 shares of Marex Group Ltd common stock. These shares originate from several Restricted Stock Unit compensation awards granted by the issuer.

What is the approximate market value of the Marex (MRX) shares in this Form 144?

The Form 144 lists an aggregate market value of about $5.34 million for the Marex Group Ltd shares covered by the notice. This value corresponds to the 75,455 shares proposed for sale.

How and when did the Marex (MRX) officer acquire the shares to be sold?

The filing reports the shares were acquired as compensation via Restricted Stock Units granted on May 4, 2023, March 11, 2025, and May 17, 2024, all from Marex Group Ltd as the issuer.

Is the Marex (MRX) Form 144 sale under a Rule 10b5-1 trading plan?

Yes. The remarks state that the sales are made in connection with a selling plan dated June 12, 2026 that is intended to comply with Rule 10b5-1(c), which governs pre-arranged trading plans.

How many Marex (MRX) shares are outstanding according to this notice?

The Form 144 lists 72,937,470 shares of common stock outstanding for Marex Group Ltd. This figure provides context and is separate from the 75,455 shares covered by the proposed sale.

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

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Available on EDGAR 09/14/2026 - 06:01 PM Accepted by SEC EDGAR 09/14/2026 - 06:00 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002057618
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Marex Group Limited
SEC File Number	001-42020
Address of Issuer	Crawford House, 50 Cedar Avenue Hamilton BERMUDA HM 11
Phone	1-441-295-6500
Name of Person for Whose Account the Securities are To Be Sold	Simon Van Den Born
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	75455	5343723.1	72937470	09/14/2026	NASD

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	03/11/2025	Acquired as compensation -- Restricted Stock Units	The Issuer			30543	03/11/2025	Compensation
Common Stock	05/04/2023	Acquired as compensation -- Restricted Stock Units	The Issuer			35982	05/04/2023	Compensation
Common Stock	05/17/2024	Acquired as compensation -- Restricted Stock Units	The issuer			8930	05/17/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	The sales of shares set forth herein are made in connection with a selling plan dated 12 June 2026 that is intended to comply with Rule 10b5-1(c).
Date of Notice	09/14/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/12/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Goldman Sachs & Co. LLC on behalf of Simon Van Den Born
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)