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 April 2025

Commission File Number: 001-42020

MAREX GROUP PLC

(Translation of registrant’s name into English)

155 Bishopsgate

London EC2M 3TQ

United Kingdom

(Address of Principal Executive Office)

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

Earnings Results

On April 2, 2025, Marex Group plc (the “Company”) issued a press release titled “Marex Group plc provides preliminary Q1 results range and hosts investor day in New York”. 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 April 2, 2025 titled “Marex Group plc provides preliminary Q1 results range and hosts investor day in New York”

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: April 2, 2025	By:	/s/ Robert Irvin
		Robert Irvin
		Chief Financial Officer