MRX Form 144: Insider Notice to Sell Common Shares

MRX: a Form 144 notice lists proposed sales of Common Stock by an issuer insider.

Rhea-AI Filing Summary

MRX: a Form 144 notice lists proposed sales of Common Stock by an issuer insider.

The filing shows proposed sell quantities tied to compensation grants: 29,769 shares with a 03/10/2025 grant date and 7,374 shares with a 05/19/2025. The broker listed is J.P. Morgan Securities LLC.

Insights

Corporate Counsel

Notice of planned Rule 144 sales tied to compensation grants.

The entry records proposed dispositions of Common Stock under Rule 144, with brokered handling by J.P. Morgan Securities LLC. The amounts correspond to compensation-related grants dated 03/10/2025 and 05/19/2025.

Timing and execution mechanics are not provided in the excerpt; subsequent filings will show settlement details and actual sale amounts.

Key Figures

Proposed sale (grant 1): 29,769 shares Proposed sale (grant 2): 7,374 shares Broker listed: J.P. Morgan Securities LLC +1 more

4 metrics

Proposed sale (grant 1) 29,769 shares grant date <date>03/10/2025</date>

Proposed sale (grant 2) 7,374 shares grant date <date>05/19/2025</date>

Broker listed J.P. Morgan Securities LLC 270 Park Avenue, 10th Floor, New York, NY

Exchange Nasdaq <date>06/12/2026</date>

Key Terms

Rule 144, Form 144, Compensation

3 terms

Rule 144 regulatory

"Securities To Be Sold entries reference rule-based resale restrictions"

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.

Form 144 regulatory

"Top of excerpt labels the filing as Form 144 for proposed sales"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Compensation financial

"Lines tie listed share quantities to 'Compensation' as the transaction reason"

FAQ

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

What does MRX's Form 144 disclose about planned insider sales?

It discloses proposed sales of Common Stock totaling specific grant-related amounts. The notice lists 29,769 shares (grant date 03/10/2025) and 7,374 shares (grant date 05/19/2025), with J.P. Morgan Securities LLC named as broker.

Do the Form 144 entries show who receives proceeds from the MRX share sales?

The excerpt does not state proceeds recipients explicitly. The entries are tied to compensation grants and list the issuer role and broker; cash‑flow treatment for the proposed sales is not provided in the excerpt.

Are the listed MRX share amounts already sold or only proposed?

They are proposed sales under Rule 144, not confirmations of completed trades. The form shows "Securities To Be Sold" items and a separate "Securities Sold During The Past 3 Months" section without completed totals in this excerpt.

Which broker is handling the proposed MRX sales?

The filing names J.P. Morgan Securities LLC at 270 Park Avenue, 10th Floor, New York. The broker is listed in the securities handling section of the Form 144 excerpt.

Do the Form 144 entries indicate these shares are related to compensation?

Yes. Each line ties the listed share amounts to Compensation as the transaction reason, with grant/award dates shown as 03/10/2025 and 05/19/2025 respectively.

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

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Accepted by SEC EDGAR 06/12/2026 - 04:00 PM EDT 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	0001379623
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 plc
SEC File Number	001-42020
Address of Issuer	155 Bishopsgate London UNITED KINGDOM EC2M 3TQ UNITED KINGDOM na
Phone	442076556000
Name of Person for Whose Account the Securities are To Be Sold	Ian Lowitt
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	CEO

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	J.P. Morgan Securities LLC 270 Park Avenue 10th Floor New York NY 10017	37143	2353380	71930870	06/12/2026	Nasdaq

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	03/10/2025	Compensation	Issuer			29769	03/10/2025	NA
Common	05/19/2025	Compensation	Issuer			7374	05/19/2025	NA

* 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 entered into on 12 March 2026 that is intended to comply with Rule 10b5-1
Date of Notice	06/12/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/12/2026
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	/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ian Lowitt
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)