Marex Group (MRX) launches leveraged buffered notes with 195% upside

Rhea-AI Filing Summary

Marex Group plc offers Leveraged Buffered Notes linked to the worst performing of EFA, EEM and IWM. The Notes have a $1,000 principal amount per Note, trade/pricing on March 31, 2026, original issue on April 6, 2026 and mature on April 5, 2028 with Final Valuation Date March 31, 2028.

Key economics: at least 195.00% Upside Participation, a -10.00% Buffer, and a Downside Leverage Factor of 111.11% (approx.). Estimated Initial Value is expected between $950.00 and $990.00 per Note. All payments are subject to Marex credit risk.

Insights

Structured-Product Analyst

Notes provide leveraged upside and amplified downside tied to the single worst-performing ETF.

The structure offers at least 195.00% participation in positive moves of the Worst Performing Underlying and protects the first 10.00% of downside, after which losses are leveraged ~111.11%. Payment depends solely on Closing Prices on the Final Valuation Date (March 31, 2028), not interim performance.

Primary dependencies are the final closing prices of EFA, EEM and IWM and Marex's creditworthiness; timing and valuation mechanics are described in the underlying supplement.

Fixed-Income Risk Specialist

Credit exposure to Marex is the investor’s principal counterparty risk.

The Notes are senior unsecured obligations of Marex; all payments are subject to Marex credit risk and are not insured. Estimated Initial Value will be set by Marex and is expected below the public offering price, reflecting internal funding and embedded derivative valuation.

Liquidity is uncertain: listing on the Vienna MTF is applied for, but a secondary market is not guaranteed.

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The information in this preliminary pricing supplement is not complete and may be changed. This preliminary pricing supplement and the accompanying underlying supplement, prospectus supplement and prospectus are not an offer to sell these securities and we are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Filed Pursuant to Rule 424(b)(2)​

Registration No. 333-289203​

Subject to Completion, Dated March 6, 2026

Pricing Supplement dated        , 2026
(To ETF Underlying Supplement dated August 4, 2025,
Prospectus Supplement dated August 4, 2025, and Prospectus dated August 4, 2025)

Marex Group plc

$      Leveraged Buffered Notes Linked to the Worst Performing of the iShares® MSCI EAFE ETF, the iShares® MSCI Emerging Markets ETF and the iShares® Russell 2000 ETF due April 5, 2028

​		​	​	At least 1.95x (to be determined on the Trade Date) upside exposure to any increases in the worst performing of the iShares® MSCI EAFE ETF, the iShares® MSCI Emerging Markets ETF and the iShares® Russell 2000 ETF (each, an “Underlying” and together the “Underlyings”)	​
​		​	​	Return of principal if the price of the Worst Performing Underlying does not change or decreases by no more than 10%	​
​		​	​	Approximately 1.1111-to-1 downside exposure to any decrease in the Worst Performing Underlying beyond a 10% decline, with up to 100% of the principal at risk.	​
​		​	​	Term: Approximately 2 years	​
​		​	​	All payments on the Notes are subject to the credit risk of Marex Group plc (“Marex”)	​

Application has been made for the Leveraged Buffered Notes (the “Notes”) offered hereunder to be admitted to listing and trading on the Vienna Multilateral 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 or passed upon the accuracy or the adequacy of this document or the accompanying prospectus, prospectus supplement or underlying supplement. Any representation 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 of the United Kingdom. Accordingly, no prospectus is required to be published in connection with such offering of the Notes in any member state of the European Economic Area (the “EEA”) or the United Kingdom (the “UK”). See page ii of the accompanying prospectus supplement for further restrictions on 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 page PS-7 of this document, page S-1 of the accompanying prospectus supplement and page S-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 to public. The market value of the Notes at any time will reflect many factors and cannot be predicted with accuracy. See “Summary—Estimated Initial Value” beginning on page PS-2 and “Risk Factors” beginning on page PS-7 of this document for additional information.

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Price to Public

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Underwriting Discount (1)

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Proceeds to Issuer

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Per Note

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$1,000.00

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Total

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(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 an underwriting discount of up to $5.00 per $1,000 Principal Amount for distribution to other registered broker-dealers or will offer the Notes directly to investors. MCMI will use the underwriting discount to pay selling concessions or fees (including custodial or clearing fees) to other registered broker-dealers. See “Supplemental Plan of Distribution (Conflicts of Interest)” on page PS-15 of this document.

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The Notes:

​ ​ Are Not FDIC Insured ​ ​ ​ Are Not Bank Guaranteed ​ ​ ​ May Lose Value ​ ​

Marex Capital Markets

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SUMMARY

The information in this “Summary” section is qualified by the more detailed information set forth in the underlying supplement, the prospectus supplement and the prospectus. See “General” in this document.

​	Issuer:	​	​	Marex Group plc	​
​	Principal Amount:	​	​	$1,000 per Note	​
​	Reference Asset:	​	​	The worst performing of the iShares® MSCI EAFE ETF (Bloomberg ticker: EFA) (the “EFA), the iShares® MSCI Emerging Markets ETF (Bloomberg ticker: EEM) (the “EEM”), and the iShares® Russell 2000 ETF (Bloomberg ticker: IWM) (the “IWM)	​
​	Trade Date:	​	​	March 31, 2026	​
​	Pricing Date:	​	​	March 31, 2026	​
​	Original Issue Date:	​	​	April 6, 2026	​
​	Final Valuation Date:	​	​	March 31, 2028, subject to adjustment as described under “Additional Terms of the Notes—Valuation Dates” in the accompanying underlying supplement.	​
​	Maturity Date:	​	​	April 5, 2028, subject to adjustment as described under “Additional Terms of the Notes—Interest Payment Dates, Coupon Payment Dates, Call Payment Dates and Maturity Date” in the accompanying underlying supplement.	​
​	Payment at Maturity:	​	​	For each $1,000 Principal Amount of the Notes, you will receive a cash payment on the Maturity Date, calculated as follows: If the Reference Return of the Worst Performing Underlying is greater than zero: $1,000 + ($1,000 × Reference Return of the Worst Performing Underlying × Upside Participation Rate) If the Reference Return of the Worst Performing Underlying is less than or equal to zero but greater than or equal to the Buffer Percentage: $1,000. If the Reference Return of the Worst Performing Underlying is less than the Buffer Percentage: $1,000 + [$1,000 × (Reference Return of the Worst Performing Underlying + Buffer Amount) × Downside Leverage Factor]. In this case, you will lose approximately 1.1111% of the Principal Amount for each 1.00% decrease in the price of the Worst Performing Underlying by more than 10%. Accordingly, you may lose up to 100% of the Principal Amount.	​
​	Upside Participation Rate:	​	​	At least 195.00% (1.95x) (to be determined on the Trade Date)	​
​	Buffer Percentage:	​	​	-10.00%	​
​	Buffer Amount:	​	​	10%	​
​	Downside Leverage Factor:	​	​	100/90, which equals approximately 111.11%	​
​	Worst Performing Underlying:	​	​	The Underlying with the lowest Reference Return.	​
​	Reference Return:	​	​	With respect to each Underlying, the quotient, expressed as a percentage, calculated as follows:	​
​	​	​	​	Final Value – Initial Value Initial Value	​
​	Initial Value:	​	​	With respect to each Underlying, its Closing Price on the Pricing Date, each subject to adjustment as described under “Additional Terms of the Notes—Anti-Dilution Adjustments” in the underlying supplement.	​
​	Final Value:	​	​	With respect to each Underlying, its Closing Price on the Final Valuation Date.	​
​	CUSIP / ISIN:	​	​	56653LAU9/US56653LAU98	​
​	Form of Notes:	​	​	Book-Entry	​
​	Listing:	​	​	Application has been made for the Notes to be admitted to listing and trading on the Vienna MTF, a multilateral trading facility operated by the Vienna Stock Exchange.	​
​	Estimated Initial Value:	​	​	The Estimated Initial Value of the Notes is expected to be less than the price you pay to purchase the Notes. The Estimated Initial Value does not represent a minimum price at which we or any of our affiliates would be	​

PS-2

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​	​	​	​	willing to purchase your Notes in the secondary market, if any, at any time. The Estimated Initial Value will be calculated on the Trade Date and will be set forth in the pricing supplement to which this document relates. See “Risk Factors—The Estimated Initial Value of the Notes, which will be determined by us on the Trade Date, is expected to be less than the price to public and may differ from the market value of the Notes in the secondary market, if any.”	​
​	Calculation Agent:	​	​	Marex Financial, one of our affiliates	​

The Trade Date, the Pricing Date and the other dates set forth above are subject to change, and will be set forth in the pricing supplement relating to the Notes.

PS-3

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GENERAL

This document relates to an offering of Notes linked to the Underlyings. The purchaser of a Note will acquire a senior unsecured debt security of Marex. We reserve the right to withdraw, cancel or modify this offering and to reject orders in whole or in part. Although the offering of Notes relates to the Underlyings, you should not construe that fact as a recommendation as to the merits of acquiring an investment linked to the Underlyings or any security held by any Underlying or as to the suitability of an investment in the Notes.

You should read this document together with the prospectus dated August 4, 2025 (the “prospectus”), the prospectus supplement dated August 4, 2025 (the “prospectus supplement”) and the ETF Underlying Supplement dated August 4, 2025 (the “underlying supplement”). If the terms of the Notes offered hereby are inconsistent with those described in the accompanying prospectus, prospectus supplement or underlying supplement, the terms described in this document shall control. You should carefully consider, among other things, the matters set forth in “Risk Factors” beginning on page PS-7 of this document, page S-1 of the prospectus supplement and page S-1 of the underlying supplement, as the Notes involve risks not associated with conventional debt securities. We urge you to consult your investment, legal, tax, accounting and other advisors before you invest in the Notes. As used herein, references to the “Issuer”, “Marex”, “we”, “us” and “our” are to Marex Group plc. References to “Fund” or “Worst Performing Fund” in the underlying supplement will be references to “Underlying” or “Worst Performing Underlying” in this document. Certain terms used but not defined herein will have the meanings set forth in the underlying supplement, the prospectus supplement or the prospectus.

You may access the underlying supplement, the prospectus supplement and the prospectus on the SEC website www.sec.gov as follows (or if such address has changed, by reviewing our filing for the relevant date on the SEC website):

​		​	​	The underlying supplement at: https://www.sec.gov/Archives/edgar/data/1997464/000119312525172158/d95057d424b2.htm	​
​		​	​	The prospectus supplement at: https://www.sec.gov/Archives/edgar/data/1997464/000119312525172136/d87748d424b2.htm	​
​		​	​	The prospectus at: https://www.sec.gov/Archives/edgar/data/1997464/000119312525172120/d87748d424b3.htm	​

We are using this document to solicit from you an offer to purchase the Notes. You may revoke your offer to purchase the Notes at any time prior to the time at which we accept your offer by notifying MCMI. We reserve the right to change the terms of, or reject any offer to purchase, the Notes prior to their issuance. In the event of any material changes to the terms of the Notes, we will notify you.

PS-4

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PAYMENT ON THE NOTES

On the Maturity Date, for each $1,000 Principal Amount of the Notes, we will pay you the Payment at Maturity, which is an amount in cash, calculated as follows:

If the Reference Return of the Worst Performing Underlying is greater than zero:

$1,000 + ($1,000 × Reference Return of the Worst Performing Underlying × Upside Participation Rate*);

*At least 195% (to be determined on the Trade Date)

If the Reference Return of the Worst Performing Underlying is less than or equal to zero but greater than or equal to the Buffer Percentage:

$1,000 (zero return).

If the Reference Return of the Worst Performing Underlying is less than the Buffer Percentage:

$1,000 + [$1,000 × (Reference Return of the Worst Performing Underlying + Buffer Amount) × Downside Leverage Factor].

In this case, you will lose approximately 1.1111% of the Principal Amount for each 1.00% decrease in the price of the Index by more than 10%. Accordingly, you may lose up to 100% of the Principal Amount.

Interest

The Notes will not pay interest.

PS-5

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INVESTOR SUITABILITY

The Notes may be suitable for you if:

​		​	​	You are a retail investor outside the EEA and the UK or an institutional buyer (for restrictions on offers or sales to retail investors in the EEA and the UK, please see page ii of the accompanying prospectus supplement).	​
​		​	​	You are an investor with the competence (either independently or with the support of a financial advisor) to assess the suitability of this investment based on your individual circumstances.	​
​		​	​	You have the necessary knowledge and/or experience with structured products and are prepared to accept the corresponding risks.	​
​		​	​	You seek an investment with an enhanced return linked to the potential positive performance of the Worst Performing Underlying and you believe that the value of the Worst Performing Underlying will increase moderately over the term of the Notes.	​
​		​	​	You are willing to make an investment that is exposed to the negative Reference Return on a leveraged basis for each percentage point that the Reference Return of the Worst Performing Underlying is below the Buffer Percentage,	​
​		​	​	You understand that the return on the Notes will depend solely on the performance of the Worst Performing Underlying and consequently, the Notes are riskier than alternative investments linked to only one of the Underlyings or linked to a basket composed of the Underlyings.	​
​		​	​	You are willing to lose all of the Principal Amount.	​
​		​	​	You are willing to forgo the dividends or other distributions paid on an Underlying or the stocks held by an Underlying.	​
​		​	​	You do not seek current income from your investment.	​
​		​	​	You are willing to hold the Notes to maturity.	​
​		​	​	You do not seek an investment for which there will be an active secondary market.	​
​		​	​	You are willing to accept the risk and return profile of the Notes versus a conventional debt security with a comparable maturity issued by Marex or another issuer with a similar credit rating.	​
​		​	​	You are comfortable with the creditworthiness of Marex, as Issuer of the Notes.	​

The Notes may not be suitable for you if:

​		​	​	You are a retail investor in the EEA or the UK (for restrictions on offers or sales to retail investors in the EEA and the UK, please see page ii of the accompanying prospectus supplement).	​
​		​	​	You are an investor without the competence (either independently or with the support of a financial advisor) to assess the suitability of this investment based on your individual circumstances.	​
​		​	​	You do not have the necessary knowledge and/or experience with structured products and are not prepared to accept the corresponding risks.	​
​		​	​	You believe that the Reference Return of the Worst Performing Underlying will be negative or that the Reference Return of the Worst Performing Underlying will not be sufficiently positive to provide you with your desired return.	​
​		​	​	You are unwilling to make an investment that is exposed to the negative Reference Return of the Worst Performing Underlying on a leveraged basis for each percentage point that the Reference Return of the Worst Performing Underlying is below the Buffer Percentage.	​
​		​	​	You seek exposure to a basket composed of the Underlyings or a similar investment in which the overall return is based on a blend of the performances of the Underlyings, rather than solely on the Worst Performing Underlying.	​
​		​	​	You seek an investment that provides full return of principal.	​
​		​	​	You prefer to receive the dividends or other distributions paid on an Underlying or the stocks held by an Underlying.	​
​		​	​	You seek current income from your investment.	​
​		​	​	You are unable or unwilling to hold the Notes to maturity.	​
​		​	​	You seek an investment for which there will be an active secondary market.	​
​		​	​	You prefer the lower risk, and therefore accept the potentially lower returns, of conventional debt securities with comparable maturities issued by Marex or another issuer with a similar credit rating.	​
​		​	​	You are not willing or are unable to assume the credit risk associated with Marex, as Issuer of the Notes.	​

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PS-6

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RISK FACTORS

We urge you to read the section “Risk Factors” beginning on page S-1 of the accompanying prospectus supplement and page S-1 of the accompanying underlying supplement. You should understand the risks of investing in the Notes and should reach an investment decision only after careful consideration, with your advisors, of the suitability of the Notes in light of your particular financial circumstances and the information set forth in this document and the accompanying prospectus, prospectus supplement and underlying supplement.

In addition to the risks discussed below, you should review “Risk Factors” in the accompanying prospectus supplement and underlying supplement including the explanation of risks relating to the Notes described in the following sections:

​		​	​	“—Risks Related to Note Issuances” in the prospectus supplement; and	​
​		​	​	“—General risks related to a Fund” in the underlying supplement.	​

You will be subject to significant risks not associated with conventional fixed-rate or floating-rate debt securities.

Risks Relating to the Structure or Features of the Notes

You may lose some or all of the principal at maturity.

The Notes do not guarantee any return of principal. You will be exposed to any decrease in the Final Value of the Worst Performing Underlying from its Initial Value beyond the Buffer Amount on a leveraged basis. Accordingly, if the Reference Return of the Worst Performing Underlying is less than the Buffer Percentage, your Payment at Maturity will be less than the Principal Amount of your Notes, and you will lose some or all of your investment at maturity.

The amount payable on the Notes is not linked to the value of the Worst Performing Underlying at any time other than on the Final Valuation Date.

The Final Value of the Worst Performing Underlying will be its Closing Price on the Final Valuation Date, subject to postponement for non-trading days and certain Market Disruption Events. Even if the value of the Worst Performing Underlying increases during the term of the Notes other than on the Final Valuation Date but then decreases on the Final Valuation Date to a value that is less than its Initial Value, the Payment at Maturity will be less, possibly significantly less, than it would have been had the Payment at Maturity been linked to the value of the Worst Performing Underlying prior to that decrease. Although the actual value of the Worst Performing Underlying on the Maturity Date or at other times during the term of the Notes may be higher than its Final Value, the Payment at Maturity will be based solely on the value of the Worst Performing Underlying on the Final Valuation Date.

The Notes are subject to the full risks of the Worst Performing Underlying and will be negatively affected if any Underlying performs poorly, even if the other Underlyings perform favorably.

You are subject to the full risks of the Worst Performing Underlying. If the Worst Performing Underlying performs poorly, you will be negatively affected, even if the other Underlyings perform favorably. The Notes are not linked to a basket composed of the Underlyings, where the better performance of one Underlying could offset the poor performance of the others. Instead, you are subject to the full risks of the Worst Performing Underlying on the Final Valuation Date. As a result, the Notes are riskier than an alternative investment linked to only one of the Underlyings or linked to a basket composed of the Underlyings. You should not invest in the Notes unless you understand and are willing to accept the full downside risks of the Worst Performing Underlying.

The Notes will not bear interest.

As a holder of the Notes, you will not receive interest payments.

Risks Relating to the Reference Asset

The Notes are subject to risks associated with non-U.S. companies.

The value of the EFA or the EEM depends upon the stocks of non-U.S. companies, and thus involves risks associated with the home countries of those non-U.S. companies. The prices of these non-U.S. stocks may be affected by political, economic, financial and social factors in the home country of each applicable company, including changes in that country’s government, economic and fiscal policies, currency exchange laws or other laws or restrictions, which could affect the value of the Notes. These foreign securities may have less liquidity and could be more volatile than many of the securities traded in U.S. or other securities markets. Direct or indirect government intervention to stabilize the relevant foreign securities markets, as well as cross shareholdings in foreign companies, may affect trading levels or prices and volumes in those markets. The other special risks associated with foreign securities may include, but are not limited to: less liquidity and smaller market capitalizations; less rigorous regulation of securities markets; different accounting and disclosure standards; governmental interference; currency fluctuations; higher inflation; and social, economic and political uncertainties. These factors may adversely affect the performance of the EFA or the EEM and, as a result, the value of the Notes.

PS-7

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The Notes are subject to currency exchange risk.

The prices of the securities held by the EFA or the EEM are converted into U.S. dollars for purposes of calculating the NAV of the EFA or the EEM. As a result, your Notes will be exposed to currency exchange rate risk with respect to each of the currencies in which the equity securities held by the EFA or the EEM trade. Your net exposure will depend on the extent to which such currencies strengthen or weaken against the U.S. dollar and the relative weight of the equity securities held by the EFA or the EEM denominated in each such currency. If, taking into account such weighting, the U.S. dollar strengthens against such currencies, the value of the EFA or the EEM will be adversely affected and the return on the Notes may be reduced.

The Notes are subject to small-capitalization risk.

The IWM tracks companies that may be considered small-capitalization companies. These companies often have greater stock price volatility, lower trading volume and less liquidity than large-capitalization companies and therefore the price of the IWM may be more volatile than an investment in stocks issued by large-capitalization companies. Stock prices of small-capitalization companies may also be more vulnerable than those of large-capitalization companies to adverse business and economic developments, and the stocks of small-capitalization companies may be thinly traded, making it difficult for the IWM to track them. In addition, small-capitalization companies are often less stable financially than large-capitalization companies and may depend on a small number of key personnel, making them more vulnerable to loss of personnel. Small-capitalization companies are often subject to less analyst coverage and may be in early, and less predictable, periods of their corporate existences. These companies tend to have smaller revenues, less diverse product lines, smaller shares of their product or service markets, fewer financial resources and less competitive strengths than large-capitalization companies, and are more susceptible to adverse developments related to their products or services.

The performance of an Underlying may not correlate with the performance of its underlying assets as well as the net asset value per share of that Underlying, especially during periods of market volatility.

The performance of an Underlying and that of its underlying assets generally will vary due to, for example, transaction costs, management fees, certain corporate actions, and timing variances. Moreover, it is also possible that the performance of an Underlying may not fully replicate or may, in certain circumstances, diverge significantly from the performance of its underlying assets. This could be due to, for example, an Underlying holding assets that are not related to the underlying assets, the temporary unavailability of certain assets in the secondary market, the performance of any derivative instruments held by an Underlying, differences in trading hours between an Underlying and the underlying assets, or due to other circumstances. This variation in performance is called the “tracking error,” and, at times, the tracking error may be significant.

In addition, because the shares of an Underlying are traded on a securities exchange and are subject to market supply and investor demand, the market price of one share of that Underlying may differ from its net asset value (“NAV”) per share; shares of an Underlying may trade at, above, or below its NAV per share.

During periods of market volatility, certain assets held by an Underlying may be unavailable in the secondary market, market participants may be unable to calculate accurately the NAV per share of that Underlying and the liquidity of that Underlying may be adversely affected. This kind of market volatility may also disrupt the ability of market participants to create and redeem shares of an Underlying. Further, market volatility may adversely affect, sometimes materially, the prices at which market participants are willing to buy and sell shares of an Underlying. As a result, under these circumstances, the market value of shares of an Underlying may vary substantially from the NAV per share of an Underlying.

For the foregoing reasons, the performance of an Underlying may not match the performance of its underlying assets over the same period. Because of this variance, the return on the Notes, to the extent dependent on the performance of an Underlying, may not be the same as an investment directly in the securities, commodities, or other assets held by an Underlying or the same as a debt security with a return linked to the performance of such underlying assets.

General Risk Factors

The Notes are subject to our credit risk.

Marex may partially or wholly fail to meet their obligations under the Notes. Investors should therefore take the creditworthiness of Marex and its subsidiaries into account in their investment decision. Credit risk means the risk of insolvency or illiquidity of an issuer, i.e. a potential, temporary or final inability to fulfil their interest and repayment obligations on time. An increased insolvency risk is typical of issuers that have a low creditworthiness. The payment of any amount due on the Notes is subject to the credit risk of Marex. The Notes are senior unsecured debt obligations of Marex, and are not, either directly or indirectly, an obligation of any third party. Investors are dependent on Marex’s ability to pay all amounts due on the Notes, and therefore investors are subject to the credit risk of Marex and to changes in the market’s view of its creditworthiness

PS-8

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The Notes are not bank deposits and are not insured or guaranteed by the U.S. Federal Deposit Insurance Corporation, the UK Financial Services Compensation Scheme or any other government or governmental or private agency or deposit protection scheme in any jurisdiction. Investors are dependent on Marex’s ability to pay all amounts due on the Notes, and therefore investors are subject to Marex’s credit risk and to changes in the market’s view of Marex’s creditworthiness. The payment of any amount due on the Notes is not guaranteed by any entity.

The Notes are not insured against loss by any third parties; you can depend only on our earnings and assets for any payment on the Notes.

The Notes will be solely our obligations, and no other entity will have any obligation, contingent or otherwise, to make any payments in respect of the Notes.

The Estimated Initial Value of the Notes, which will be determined by us on the Trade Date, is expected to be less than the price to public and may differ from the market value of the Notes in the secondary market, if any.

The Estimated Initial Value of the Notes will be calculated by us on the Trade Date and is expected to be less than the price to public. The Estimated Initial Value will reflect our and our affiliates’ internal funding rate, which is the borrowing rate paid to issue market-linked securities, as well as the mid-market value of the embedded derivatives in the Notes. This internal funding rate is typically lower than the rate we would use when we issue conventional fixed or floating rate debt securities. As a result of the difference between our internal funding rate and the rate we would use when we issue conventional fixed or floating rate debt securities, the Estimated Initial Value of the Notes may be lower if it were based on the prices at which our fixed or floating rate debt securities trade in the secondary market. In addition, if we were to use the rate we use for our conventional fixed or floating rate debt issuances, we would expect the economic terms of the Notes to be more favorable to you. We will determine the value of the embedded derivatives in the Notes by reference to our or our affiliates’ internal pricing models. These pricing models consider certain assumptions and variables, which can include volatility and interest rates. Different pricing models and assumptions could provide valuations for the Notes that are different from our Estimated Initial Value. These pricing models rely in part on certain forecasts about future events, which may prove to be incorrect. The Estimated Initial Value does not represent a minimum price at which we or any of our affiliates would be willing to purchase your Notes in the secondary market (if any exists) at any time.

The price of your Notes in the secondary market, if any, immediately after the Trade Date is expected to be less than the price to public.

The price to public takes into account certain costs. These costs include our affiliates’ projected hedging profits (which may or may not be realized) for assuming risks inherent in hedging our obligations under the Notes, the underwriting discount and the costs associated with structuring and hedging our obligations under the Notes. These costs will be used or retained by us or one of our affiliates, except for underwriting discounts paid to unaffiliated distributors. If you were to sell your Notes in the secondary market, if any, the price you would receive for your Notes may be less than the price you paid for them because secondary market prices will not take into account these costs. The price of your Notes in the secondary market, if any, at any time after issuance will vary based on many factors, including the values of the Underlyings and changes in market conditions, and cannot be predicted with accuracy. The Notes are not designed to be short-term trading instruments, and you should, therefore, be able and willing to hold the Notes to maturity. Any sale of the Notes prior to maturity could result in a loss to you.

If we were to repurchase your Notes immediately after the Original Issue Date, the price you receive may be higher than the Estimated Initial Value of the Notes.

Assuming that all relevant factors remain constant after the Original Issue Date, the price at which MCMI may initially buy or sell the Notes in the secondary market, if any, and the value that may initially be used for customer account statements, if any, may exceed the Estimated Initial Value on the Trade Date for a temporary period expected to be approximately 6 months after the Original Issue Date. This temporary price difference may exist because, in our discretion, we may elect to effectively reimburse to investors a portion of the estimated cost of hedging our obligations under the Notes and other costs in connection with the Notes that we will no longer expect to incur over the term of the Notes. We will make such discretionary election and determine this temporary reimbursement period on the basis of a number of factors, including the tenor of the Notes and any agreement we may have with the distributors of the Notes. The amount of our estimated costs which we effectively reimburse to investors in this way may not be allocated ratably throughout the reimbursement period, and we may discontinue such reimbursement at any time or revise the duration of the reimbursement period after the Original Issue Date of the Notes based on changes in market conditions and other factors that cannot be predicted.

You will not have any ownership interest in any Underlying or any stocks held by any Underlying.

As a holder of the Notes, you will not have any ownership interest in any Underlying or any stocks held by any Underlying, such as rights to vote, dividend payments or other distributions. Because the return on the Notes will not reflect any dividends on any Underlying or any

PS-9

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stocks held by any Underlying, the Notes may underperform an investment in one or more Underlyings or the stocks held by any Underlying.

The Notes lack liquidity.

The Notes are a new issue of securities for which there is no established market. Although we will apply for the Notes to be listed for trading on the Vienna MTF, we cannot provide you with any assurance regarding whether the Notes will become or remain listed or whether a trading market for the Notes will develop or as to the liquidity or sustainability of any such market, the ability of holders of the Notes to sell their Notes or the price at which holders may be able to sell their Notes. The listing application will be subject to approval by the Vienna Stock Exchange. There can be no assurance that application for listing and admission to trading will be granted or than an active trading market in the Notes will develop. If such a listing is obtained, we have no obligation to maintain such listing, and we may delist the Notes at any time. In addition, MCMI is not required to offer to purchase the Notes in the secondary market. Even if a secondary market were to develop, it may not provide enough liquidity to allow you to trade or sell the Notes easily. Because other dealers are not likely to make a secondary market for the Notes, the price at which you may be able to trade your Notes is likely to depend on the price, if any, at which MCMI is willing to buy the Notes.

Potential conflicts of interest may exist.

Marex and its affiliates play a variety of roles in connection with the issuance of the Notes, including acting as calculation agent and hedging our obligations under the Notes. Following the occurrence of certain events—relating to the Issuer, the Issuer’s hedging arrangements, the Underlying(s), taxation, the relevant currency or other matters—outside of the Issuer’s control, the calculation agent may determine in its discretion to take one of the actions available to it in order to deal with the impact of such event on the Notes or the Issuer or both. These actions may include (i) adjustment to the terms and conditions of the Notes, (ii) substitution of the Underlying(s) and/or (iii) early redemption or exercise of the Notes. In performing these duties, the economic interests of the calculation agent and other affiliates of ours are potentially adverse to your interests as an investor in the Notes. Any such discretionary determination by the Issuer or the calculation agent could have a negative impact on the value of the Notes. We will not have any obligation to consider your interests as a holder of the Notes in taking any action that might adversely affect the value of your Notes.

Uncertain tax treatment.

For a discussion of the U.S. federal income tax consequences of your investment in a Note, please see the discussion under “U.S. Federal Income Tax Considerations” herein, the discussion under “U.S. Federal Income Tax Considerations” in the accompanying prospectus supplement and the discussion under “Material Tax Considerations—Material U.S. Federal Income Tax Considerations” in the accompanying prospectus.

PS-10

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ILLUSTRATIVE EXAMPLES

The following table and examples are provided for illustrative purposes only and are hypothetical. They do not purport to be representative of every possible scenario concerning increases or decreases in the Final Value of any Underlying relative to its Initial Value. We cannot predict the Closing Price of any Underlying at any time during the term of the Notes, including the Final Valuation Date. The assumptions we have made in connection with the illustrations set forth below may not reflect actual events. You should not take this illustration or these examples as an indication or assurance of the expected performance of any Underlying or the return on your Notes. The numbers appearing in the table below and following examples have been rounded for ease of analysis.

The table and examples below illustrate the Payment at Maturity on a $1,000 investment in the Notes for a hypothetical range of Reference Returns of the Worst Performing Underlying from -100% to +100%. The following results are based solely on the assumptions outlined below. The “Hypothetical Return on the Notes” as used below is the number, expressed as a percentage, that results from comparing the Payment at Maturity per $1,000 Principal Amount to $1,000. The potential returns described below assume that the Notes are held to maturity. The following table and examples assume the following:

​	Principal Amount:	​	​	$1,000	​
​	Hypothetical Initial Value of the Worst Performing Underlying:	​	​	$100.00	​
​	Hypothetical Upside Participation Rate:	​	​	195.00%	​
​	Downside Leverage Factor:	​	​	100/90, which equal approximately 111.11%	​
​	Buffer Percentage:	​	​	-10.00%	​
​	Buffer Amount:	​	​	10.00%	​

​

​

Hypothetical Final Value of the Worst Performing Underlying

​

​

​

Hypothetical Reference Return of the Worst Performing Underlying

​

​

​

Hypothetical Payment at Maturity

​

​

​

Hypothetical Return on the Notes

​

​

​

​

$200.00

​

​

​

100.00%

​

​

​

$2,950.00

​

​

​

195.00%

​

​

​

​

$180.00

​

​

​

80.00%

​

​

​

$2,560.00

​

​

​

156.00%

​

​

​

​

$160.00

​

​

​

60.00%

​

​

​

$2,170.00

​

​

​

117.00%

​

​

​

​

$140.00

​

​

​

40.00%

​

​

​

$1,780.00

​

​

​

78.00%

​

​

​

​

$120.00

​

​

​

20.00%

​

​

​

$1,390.00

​

​

​

39.00%

​

​

​

​

$110.00

​

​

​

10.00%

​

​

​

$1,195.00

​

​

​

19.50%

​

​

​

​

$105.00

​

​

​

5.00%

​

​

​

$1,097.50

​

​

​

9.75%

​

​

​

​

$102.00

​

​

​

2.00%

​

​

​

$1,039.00

​

​

​

3.90%

​

​

​

​

$100.00(1)

​

​

​

0.00%

​

​

​

$1,000.00

​

​

​

0.00%

​

​

​

​

$95.00

​

​

​

-5.00%

​

​

​

$1,000.00

​

​

​

0.00%

​

​

​

​

$92.00

​

​

​

-8.00%

​

​

​

$1,000.00

​

​

​

0.00%

​

​

​

​

$90.00

​

​

​

-10.00%(2)

​

​

​

$1,000.00

​

​

​

0.00%

​

​

​

​

$85.00

​

​

​

-15.00%

​

​

​

$944.44

​

​

​

-5.56%

​

​

​

​

$80.00

​

​

​

-20.00%

​

​

​

$888.89

​

​

​

-11.11%

​

​

​

​

$60.00

​

​

​

-40.00%

​

​

​

$666.67

​

​

​

-33.33%

​

​

​

​

$40.00

​

​

​

-60.00%

​

​

​

$444.44

​

​

​

-55.56%

​

​

​

​

$20.00

​

​

​

-80.00%

​

​

​

$222.22

​

​

​

-77.78%

​

​

​

​

$0.00

​

​

​

-100.00%

​

​

​

$0.00

​

​

​

-100.00%

​

​

​

(1)

The hypothetical Initial Value of $100.00 used in these examples has been chosen for illustrative purposes only, and does not represent a likely actual Initial Value of any Underlying.

​

(2)

This is the Buffer Percentage.

​

PS-11

​

The following examples indicate how the Payment at Maturity would be calculated with respect to a hypothetical $1,000 investment in the Notes assuming that the Notes are held to maturity.

Example 1: The Reference Return of the Worst Performing Underlying Is 2.00%.

Because the Reference Return of the Worst Performing Underlying is greater than zero, the Payment at Maturity would be $1,039.00 per $1,000 Principal Amount, calculated as follows:

$1,000 + ($1,000 × Reference Return of the Worst Performing Underlying × Upside Participation Rate)

= $1,000 + ($1,000 × 2.00% × 195%)

= $1,039.00

Example 1 shows that the Notes provide a leveraged return if the Reference Return of the Worst Performing Underlying is positive.

Example 2: The Reference Return of the Worst Performing Underlying Is -5.00%.

Because the Reference Return of the Worst Performing Underlying is less than or equal to zero but greater than or equal to the Buffer Percentage, the Payment at Maturity would be $1,000.00 per $1,000 Principal Amount.

Example 2 shows that the Payment at Maturity will equal the Principal Amount if the Reference Return of the Worst Performing Underlying is less than or equal to zero but greater than or equal to the Buffer Percentage, although the value of the Worst Performing Underlying has decreased moderately.

Example 3: The Reference Return of the Worst Performing Underlying Is -80.00%.

Because the Reference Return of the Worst Performing Underlying is less than the Buffer Percentage, the Payment at Maturity would be $222.22 per $1,000 Principal Amount, calculated as follows:

$1,000 + [$1,000 × (Reference Return of the Worst Performing Underlying + Buffer Amount) × Downside Leverage Factor]

= $1,000 + [$1,000 × (-80.00% + 10.00%) × 100/90]

= $222.22

Example 3 shows that you are exposed on a leveraged basis to any decrease in the value of the Worst Performing Underlying by more than the Buffer Amount. You may lose up to 100% of your Principal Amount.

PS-12

​

DESCRIPTION OF THE REFERENCE ASSET

Description of the EFA

The EFA seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the MSCI EAFE Index, which is designed to captures large- and mid-cap representation across certain developed markets countries, excluding the United States and Canada. Shares of this Underlying are listed and trade on the NYSE Arca, Inc. (the “NYSE Arca”) under the ticker symbol “EFA.”

For more information about this Underlying, see “Reference Sponsors and Funds—The iShares® MSCI EAFE ETF” beginning on page S-52 of the accompanying underlying supplement.

Historical Performance of the EFA

The following graph sets forth the historical performance of the EFA based on the daily historical closing prices from February 27, 2021 through February 27, 2026. We obtained the closing prices below from Bloomberg L.P. (“Bloomberg”). We have not undertaken any independent review of, or made any due diligence inquiry with respect to, the information obtained from Bloomberg.

​

The historical values of this Underlying should not be taken as an indication of its future performance, and no assurance can be given as to the Closing Price of this Underlying on the Final Valuation Date.

Description of the EEM

The EEM seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the MSCI Emerging Markets Index, which is designed to captures large- and mid-cap representation across certain developing markets countries. Shares of this Underlying are listed and trade on the NYSE Arca under the ticker symbol “EEM.”

For more information about this Underlying, see “Reference Sponsors and Funds—The iShares® MSCI Emerging Markets ETF” beginning on page S-57 of the accompanying underlying supplement.

Historical Performance of the EEM

The following graph sets forth the historical performance of the EEM based on the daily historical closing prices from February 27, 2021 through February 27, 2026. We obtained the closing prices below from Bloomberg. We have not undertaken any independent review of, or made any due diligence inquiry with respect to, the information obtained from Bloomberg.

​

The historical values of this Underlying should not be taken as an indication of its future performance, and no assurance can be given as to the Closing Price of this Underlying on the Final Valuation Date.

PS-13

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Description of the IWM

The IWM seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the Russell 2000® Index, which is designed to measures the performance of the small-cap segment of the U.S. equity universe. The Russell 2000® Index is a subset of the Russell 3000® Index, which is designed to represent approximately 98% of the investable U.S. equity market. Shares of this Underlying are listed and trade on the NYSE Arca under the ticker symbol “IWM.”

For more information about this Underlying, see “Reference Sponsors and Funds—The iShares® Russell 2000 ETF” beginning on page S-66 of the accompanying underlying supplement.

Historical Performance of the IWM

The following graph sets forth the historical performance of the IWM based on the daily historical closing prices from February 27, 2021 through February 27, 2026. We obtained the closing prices below from Bloomberg. We have not undertaken any independent review of, or made any due diligence inquiry with respect to, the information obtained from Bloomberg.

​

The historical values of this Underlying should not be taken as an indication of its future performance, and no assurance can be given as to the Closing Price of this Underlying on the Final Valuation Date.

PS-14

​

SUPPLEMENTAL PLAN OF DISTRIBUTION (CONFLICTS OF INTEREST)

We have appointed MCMI, an affiliate of Marex, as the agent for the sale of the Notes. Pursuant to the terms of a distribution agreement, MCMI will purchase the Notes from Marex at the price to public less the underwriting discount set forth on the cover page of the pricing supplement to which this document relates, for distribution to other registered broker-dealers or will offer the Notes directly to investors. MCMI proposes to offer the Notes at the price to public set forth on the cover page of this document. MCMI will use the underwriting discount to pay selling concessions or fees (including custodial or clearing fees) to other registered broker-dealers.

An affiliate of Marex has paid or may pay in the future an amount to broker-dealers in connection with the costs of the continuing implementation of systems to support the Notes. We or one of our affiliates may pay a fee to one or more broker dealers for providing certain services with respect to this offering, which may reduce the economic terms of the Notes to you.

In addition, MCMI or another of our affiliates or agents may use the pricing supplement to which this document relates in market-making transactions after the initial sale of the Notes, but is under no obligation to make a market in the Notes and may discontinue any market-making activities at any time without notice.

See “Supplemental Plan of Distribution (Conflicts of Interest)” on page S-61 in the prospectus supplement.

We expect that delivery of the Notes will be made against payment for the Notes on or about the Original Issue Date set forth on the inside cover page of this document, which is more than one business day following the Trade Date. Under Rule 15c6-1 under the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in one business day, unless the parties to that trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes more than one business day prior to the Original Issue Date will be required to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement, and should consult their own advisors.

U.S. FEDERAL INCOME TAX CONSIDERATIONS

The U.S. federal income tax consequences of each holder’s investment in the Notes are uncertain. There are no Treasury Regulations, published rulings or judicial decisions addressing the treatment for U.S. federal income tax purposes of securities with terms that are substantially the same as the Notes. By purchasing the Notes, each holder agrees (in the absence of a change in law, an administrative determination or a judicial ruling to the contrary) to treat each Note as a pre-paid executory contract for U.S. federal income tax purposes. In the opinion of our counsel, Mayer Brown LLP, it would generally be reasonable to treat the Notes as pre-paid executory contracts in respect of the Underlyings for U.S. federal income tax purposes.

In addition, subject to the discussion in the accompanying prospectus supplement regarding section 1260 of the Code, a U.S. Holder should generally recognize capital gain or loss upon redemption, sale or maturity or other taxable disposition of such holder’s Notes in an amount equal to the difference between the amount realized at such time and such holder’s tax basis in such Notes. In general, a U.S. Holder’s tax basis in the Notes will equal the holder’s cost for the Notes. Such gain or loss should generally be long-term capital gain or loss if a U.S. Holder has held the Notes for more than one year (otherwise such gain or loss should be short-term capital gain or loss if held for one year or less). The deductibility of capital losses is subject to limitations. U.S. Holders should consult their tax advisors regarding this risk.

The U.S. federal income tax consequences of a U.S. Holder’s investment in the Notes are uncertain and the Internal Revenue Service could assert that the Notes should be taxed in a manner that is different from that described above. Please see the discussion in the accompanying prospectus supplement under “U.S. Federal Income Tax Considerations” and in particular the discussion under “U.S. Federal Income Tax Considerations—U.S. Holders—Certain Notes Treated as a Put Option and a Deposit or an Executory Contract—Certain Notes Treated as Executory Contracts” and the discussion in the accompanying prospectus under “Material Tax Considerations—Material U.S. Federal Income Tax Considerations”.

Non-U.S. Holders should review the discussion in the accompanying prospectus supplement under “U.S. Federal Income Tax Considerations—Non-U.S. Holders” for a discussion of the U.S. federal income tax consequences applicable to Non-U.S. Holders.

A “dividend equivalent” payment is treated as a dividend from sources within the United States and such payments generally would be subject to a 30% U.S. withholding tax if paid to a Non-U.S. Holder. Under Treasury Regulations, payments (including deemed payments) with respect to equity-linked instruments (“ELIs”) that are “specified ELIs” may be treated as dividend equivalents if such specified ELIs reference an interest in an “underlying security,” which is generally any interest in an entity taxable as a corporation for U.S. federal income tax purposes if a payment with respect to such interest could give rise to a U.S. source dividend. However, IRS guidance provides that withholding on dividend equivalent payments will not apply to specified ELIs that are not delta-one instruments and that are issued before January 1, 2027. We expect that the delta of the Notes will not be one, and therefore, we expect that Non-U.S. Holders should not be subject to withholding on dividend equivalent payments, if any, under the Notes. However, it is possible that the Notes could be treated as deemed reissued for U.S. federal income tax purposes upon the occurrence of certain events affecting an Underlying or the Notes, and following such occurrence the Notes could be treated as subject to withholding on dividend equivalent payments. Non-U.S. Holders that enter, or have entered, into other transactions in respect of an Underlying or the Notes should consult their tax advisors as to the application

PS-15

​

of the dividend equivalent withholding tax in the context of the Notes and their other transactions. If any payments are treated as dividend equivalents subject to withholding, we (or an applicable withholding agent) would be entitled to withhold taxes without being required to pay any additional amounts with respect to amounts so withheld.

PROSPECTIVE PURCHASERS OF THE NOTES SHOULD CONSULT THEIR TAX ADVISORS AS TO THE TAX CONSEQUENCES OF THE ABOVE DESCRIBED CHARACTERIZATION OF THE NOTES AND ANY POSSIBLE ALTERNATIVE CHARACTERIZATIONS OF THE NOTES FOR U.S. FEDERAL INCOME TAX PURPOSES. PROSPECTIVE PURCHASERS OF NOTES SHOULD CONSULT THEIR TAX ADVISORS AS TO THE FEDERAL, STATE, LOCAL, AND OTHER TAX CONSEQUENCES TO THEM OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF NOTES.

PS-16

FAQ

What are the key terms of MRX Leveraged Buffered Notes?

The Notes have a $1,000 principal amount, trade/pricing on March 31, 2026, original issue April 6, 2026, and maturity on April 5, 2028. Final Valuation Date is March 31, 2028.

How is my Payment at Maturity determined for MRX notes?

Payment at Maturity depends on the Reference Return of the Worst Performing Underlying on the Final Valuation Date. Upside uses at least 195.00% participation; downside beyond -10.00% is leveraged by ~111.11%.

What is the Estimated Initial Value and how does it relate to price for MRX notes?

The Estimated Initial Value is expected between $950.00 and $990.00 per Note and will be less than the public offering price. It reflects Marex’s internal funding rate and embedded derivative valuation.

What risks should MRX note investors be aware of?

Investors face credit risk of Marex, leveraged downside beyond the 10% buffer (up to 100% principal loss), lack of interest payments, and uncertain secondary market liquidity if listing on Vienna MTF is not active.

Which ETFs serve as the reference assets for MRX notes?

The Notes reference the worst performing of three ETFs: EFA (iShares MSCI EAFE), EEM (iShares MSCI Emerging Markets), and IWM (iShares Russell 2000). The Worst Performing Underlying is the one with the lowest Reference Return on the Final Valuation Date.