蒙特利尔银行美股招股说明书(2026-08-06版)

Subject To Completion, dated August 6, 2026PRICING SUPPLEMENT dated August, 2026(To Product Supplement No. WF1 dated March 25, 2025,Prospectus Supplement dated March 25, 2025and Prospectus dated March 25, 2025)Bank of Montreal Market Linked Securities—Contingent Fixed Return and Contingent DownsidePrincipal at Risk Securities Linked to the Common Stock of Oracle Corporation due August 26, 2027 Linked to the common stock of Oracle Corporation (the “Underlier”) Unlike ordinary debt securities, the securities do not pay interest or repay a fixed amount of principal at maturity.Instead, the securities provide for a maturity payment amount that may be greater than or less than the face amount of the securities, depending on the performance of the Underlier fromthe starting value to the ending value.The maturity payment amount will reflect the following terms:If the value of the Underlier increases, remains flat or decreases, but the decrease is not more than 40%, you will receive the face amount plus a contingent fixed return of at least 30.45% (to be determined on the pricing date) of the face amountIf the value of the Underlier decreases by more than 40%, you will have full downside exposure to the decrease in the value of the Underlier fromthe starting value, and you will lose more than 40%, and possibly all, of the face amount of your securitiesInvestors may lose a significant portion or all of the face amount Any positive return on the securities at maturity will be limited to the contingent fixed return, even if the ending value of the Underlier significantlyexceeds the starting value; you will not participate in any appreciation of the UnderlierAll payments on the securities are subject to the credit risk of Bank of Montreal, and you will have no ability to pursue the Underlier for payment; ifBank of Montreal defaults on its obligations, you could lose some or all of your investmentNo periodic interest payments or dividendsNo exchange listing; designed to be held to maturity On the date of this preliminary pricing supplement, the estimated initial value of the securities is $962.60 per security. The estimated initial value of the securities at pricing may differ from this value but will not be less than $910.00 per security. However, as discussed in more detail in this pricing supplement, the actual value ofthe securities at any time will reflect many factors and cannot be predicted with accuracy. See “Estimated Value of the Securities” in this pricing supplement.The securities have complex features and investing in the securities involves risks not associated with an investment in conventional debt securities. See “SelectedRisk Considerations” beginning on page PRS-8 herein and “Risk Factors” beginning on page PS-5 of the accompanying product supplement, page S-2 of theprospectus supplement and page 9 of the prospectus.The securities are the unsecured obligations of Bank of Montreal, and, accordingly, all payments on the securities are subject to the credit risk of Bank of Montreal. If Bank of Montreal defaults on its obligations, you could lose some or all of your investment. The securities are not insured by the Federal Deposit InsuranceCorporation, the Deposit Insurance Fund, the Canada Deposit Insurance Corporation or any other governmental agency.The securities are not bail-inable notes and are not subject to conversion into our common shares or the common shares of any of our affiliates under subsection Neither the Securities and Exchange Commission nor any state securities commission or other regulatory body has approved or disapproved of these securities orpassed upon the accuracy or adequacy of this pricing supplement or the accompanying product supplement, prospectus supplement and prospectus. Anyrepresentation to the contrary is a criminal offense. (1)Wells Fargo Securities, LLC is the agent for the distribution of the securities and is acting as principal. See “Terms of the Securities—Agent” and “EstimatedValue of the Securities” in this pricing supplement for further information.(2)In respect of certain securities sold in this offering, our affiliate, BMO Capital Markets Corp., may pay a fee of up to $2.00 per security to selected securitiesdealers in consideration for marketing and other services in connection with the distribution of the securities to other securities dealers.Wells Fargo Securities Principal at Risk Securities Linked to the Common Stock of Oracle Corporation due August 26, 2027 Market Linked Securities—Contingent Fixed Return andContingent Downside Principal at Risk Securities Linked to the Common Stock of Oracle Corporation due August 26, 2027 For a discussion of material U.S. federal income and certain estate tax consequences and Canadian federal income taxconsequences of the ownership and disposition of the securities, see “United States Federal Income Tax Considerations”below and the sections of the product supplement entitled “United States Fed