Marex files 6-K; Exhibit 99.1 on CEO ordinary share purchase

Rhea-AI Filing Summary

Marex Group plc filed a Form 6-K reporting that it furnished a press release titled “Marex announces purchase of shares by Chief Executive Officer.” The press release was issued on October 13, 2025.

The release is included as Exhibit 99.1. The filing was signed on the company’s behalf by Chief Financial Officer Robert Irvin on October 14, 2025.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO SECTION 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2025

Commission File Number: 001-42020

MAREX GROUP PLC

(Translation of registrant’s name into English)

155 Bishopsgate London EC2M 3TQ United Kingdom +44 20 7655 6000 140 East 45th Street, 10th Floor New York, New York 10017 (212) 618-2800

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

EXPLANATORY NOTE

Purchase of Ordinary Shares by Chief Executive Officer

On October 13, 2025, Marex Group plc (the “Company”) issued a press release titled “Marex announces purchase of shares by Chief Executive Officer”. A copy of the press release is furnished as Exhibit 99.1 herewith.

EXHIBIT INDEX

The following exhibit is furnished as part of this Form 6-K:

Exhibit No.		Description
99.1		Press release dated October 13, 2025 titled “Marex announces purchase of shares by Chief Executive Officer”

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

				Marex Group plc
Date: October 14, 2025				By:		/s/ Robert Irvin
						Robert Irvin
						Chief Financial Officer

FAQ

What did MRX announce in this Form 6-K?

It furnished a press release titled “Marex announces purchase of shares by Chief Executive Officer.”

When was the press release issued?

October 13, 2025.

Which exhibit contains the press release?

Exhibit 99.1 contains the press release.

What is the filing type for MRX?

Form 6-K (Report of Foreign Private Issuer).

Who signed the report for Marex Group plc?

Chief Financial Officer Robert Irvin signed the report on October 14, 2025.

What is the subject of the press release included in the filing?

The Chief Executive Officer’s purchase of ordinary shares.