Marex Group plc美股招股说明书(2026-01-13版)

The information in this preliminary pricing supplement is not complete and may be changed. This preliminary pricing supplement and theaccompanying underlying supplement, prospectus supplement and prospectus are not an offer to sell these securities and we are not solicitingan offer to buy these securities in any jurisdiction where the offer or sale is not permitted. Subject to Completion Amendment No.1 Dated January13, 2026 to Preliminary Pricing Supplement Dated January12, 2026 Pricing Supplement dated, 2026(To ETF Underlying Supplement dated August4, 2025,Prospectus Supplement dated August4, 2025, and Prospectus dated August4, 2025) Marex Group plc$Autocallable Buffered Notes Linked to the Worst Performing of the VanEck®Gold Miners ETF and the iShares®Silver Trust due January22, 2031 ▶Callable annually in the first year and monthly thereafter during the term of the Notes at the Principal Amount plus the applicable Call Premium onany Call Observation Date on or after January15, 2027 if the Closing Price of each of the VanEck®Gold Miners ETF and the iShares®Silver Trust(each, an “Underlying” and together the “Underlyings”) is at or above its Call Threshold (100% of its Initial Value)▶The Call Premium Rate will be 20.00% per annum or 1.667% per month▶If the Notes are not called, 1-to-1 downside exposure to any decrease in the Worst Performing Underlying beyond a 30.00% decline, with up to70.00% of your Principal Amount at risk▶Term: Approximately 5 years, if not called▶All payments on the Notes are subject to the credit risk of Marex Group plc (“Marex”) Application has been made for the Autocallable Buffered Notes (the “Notes”) offered hereunder to be admitted to listing and trading on the ViennaMultilateral Trading Facility (“Vienna MTF”) of the Vienna Stock Exchange. The Vienna MTF is not a regulated market as defined by Directive 2014/65/EU(as amended, “MiFID II”). It is, however, a multilateral trading facility (MTF) for purposes of MiFID II. Neither the U.S. Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of the Notes orpassed upon the accuracy or the adequacy of this document or the accompanying prospectus, prospectus supplement or underlying supplement. Anyrepresentation to the contrary is a criminal offense. Any offering of the Notes will be made pursuant to Article 1(4) of Regulation (EU) 2017/1129 (as amended), including as it forms part of domestic law ofthe United Kingdom. Accordingly, no prospectus is required to be published in connection with such offering of the Notes in any member state of theEuropean Economic Area (the “EEA”) or the United Kingdom (the “UK”). See page ii of the accompanying prospectus supplement for further restrictionson offers and sales of the Notes in the EEA and the UK. Investment in the Notes involves certain risks. You should refer to “Risk Factors” beginning on pagePS-8 of this document, pageS-1 of theaccompanying prospectus supplement and pageS-1 of the accompanying underlying supplement. The Estimated Initial Value of the Notes on the Pricing Date is expected to be between $950.00 and $990.00 per Note, which will be less than the price topublic. The market value of the Notes at any time will reflect many factors and cannot be predicted with accuracy. See “Summary—Estimated InitialValue” on pagePS-4 and “Risk Factors” beginning on page PS-8 of this document for additional information. (1)Marex Capital Markets Inc. (“MCMI”), an affiliate of ours, will act as the agent for the sale of the Notes. MCMI will purchase the Notes from us at anunderwriting discount of up to $4.00 per $1,000 Principal Amount for distribution to other registered broker-dealers or will offer the Notes directly toinvestors. MCMI will use the underwriting discount to pay selling concessions or fees (including custodial or clearing fees) to other registeredbroker-dealers. See “Supplemental Plan of Distribution (Conflicts of Interest)” on pagePS-17 of this document. The Notes: SUMMARY The information in this “Summary” section is qualified by the more detailed information set forth in the underlying supplement, the prospectus supplementand the prospectus. See “General” in this document. January14, 2031, subject to adjustment as described under “Additional Terms of the Notes—Valuation Dates”in the accompanying underlying supplement. January22, 2031, subject to adjustment as described under “Additional Terms of the Notes—Interest PaymentDates, Coupon Payment Dates, Call Payment Dates and Maturity Date” in the accompanying underlyingsupplement. If the Closing Price of each Underlying is at or above its Call Threshold on any Call Observation Date, theNotes will be automatically called, and you will receive a cash payment (the “Call Amount”), per $1,000Principal Amount, equal to the Principal Amount plus the applicable Call Premium on the corresponding CallPayment Date, as specified in the table below. If the Notes are auto