144 0001379623 XXXXXXXX LIVE 0001997464 Marex Group plc 001-42020 155 Bishopsgate London UNITED KINGDOM EC2M 3TQ X0 na 442076556000 Ian Lowitt CEO Common Stock J.P. Morgan Securities LLC 270 Park Avenue 10th Floor New York NY 10017 37143 2353380 71930870 06/12/2026 Nasdaq Common 03/10/2025 Compensation Issuer N 29769 03/10/2025 NA Common 05/19/2025 Compensation Issuer N 7374 05/19/2025 NA Y 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 06/12/2026 03/12/2026 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Ian Lowitt