Marex Group plc Ordinary Shares (MRX) F-1 Registration statement (foreign)

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form F-1 of our report dated 26 March 2024, relating to the financial statements of Marex Group plc. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ Deloitte LLP

London, United Kingdom

October 15, 2024