美国银行美股招股说明书(2026-04-27版)

Preliminary Pricing SupplementSubject To Completion, dated April 27, 2026 (To Prospectus dated December 8, 2025,Series A Prospectus Supplement dated December 8, 2025 andProduct Supplement No. WF-1 dated December 8, 2025) BofA Finance LLC Fully and Unconditionally Guaranteed by Bank of America CorporationMarket Linked Securities—Auto-Callable with Contingent Coupon andContingent Downside Principal at Risk Securities Linked to the Lowest Performing of the S&P 500®Index, theState Street®SPDR®S&P®MidCap 400®ETF Trust and the iShares®Expanded Tech-Software Sector ETF due November 16, 2029Linked to the Lowest Performing of the S&P 500®Index, the State Street®SPDR®S&P®MidCap 400® ETF Trust and theiShares®Expanded Tech-Software Sector ETF (each referred to as an “Underlying”)■Unlike ordinary debt securities, the Securities do not provide for fixed payments of interest, do not repay a fixed amount of principal on the Maturity Date and are subject to potential automatic call prior to the Maturity Date upon the terms describedbelow.Whether the Securities pay a Contingent Coupon, whether the Securities are automatically called prior to the Maturity Dateand, if they are not automatically called, whether you receive the principal amount of your Securities on the Maturity Date willdepend, in each case, on the closing value of the Lowest Performing Underlying on the relevant Calculation Day.The LowestPerforming Underlying on any Calculation Day is the Underlying that has the lowest closing value on that Calculation Day as apercentage of its Starting ValueContingent Coupon.The Securities will pay a Contingent Coupon Payment on a monthly basis until the earlier of the Maturity Date or automatic call if,and only if, the closing value of the Lowest Performing Underlying on the Calculation Day for that month isgreater than or equal to its Coupon Barrier. However, if the closing value of the Lowest Performing Underlying on a Calculation Dayis less than its Coupon Barrier, you will not receive any Contingent Coupon Payment for the relevant month. If the closing value ofthe Lowest Performing Underlying is less than its Coupon Barrier on every Calculation Day, you will not receive any ContingentCoupon Payments throughout the entire term of the Securities. The Coupon Barrier for each Underlying is equal to 65% of itsStarting Value. The Contingent Coupon Rate will be determined on the Pricing Date and will be at least 11.00% per annum■Automatic Call.If the closing value of the Lowest Performing Underlying on any of the Calculation Days from November 2026 to October 2029, inclusive, is greater than or equal to its Starting Value, the Securities will be automatically called for the principalamount plus a final Contingent Coupon PaymentPotential Loss of Principal.If the Securities are not automatically called prior to the Maturity Date, you will receive the principal amount on the Maturity Date if,and only if, the closing value of the Lowest Performing Underlying on the Final Calculation Day isgreater than or equal to its Threshold Value.If the closing value of the Lowest Performing Underlying on the Final Calculation Dayis less than its Threshold Value, you will lose more than 35%, and possibly all, of the principal amount of your Securities. TheThreshold Valuefor each Underlying is equal to 65% of its Starting Value If the Securities are not automatically called prior to the Maturity Date, you will have full downside exposure to the LowestPerforming Underlying from its Starting Value if its closing value on the Final Calculation Day is less than its Threshold Value, butyou will not participate in any appreciation of any Underlying and will not receive any dividends on shares of the Funds or thesecurities held by or included in any UnderlyingYour return on the Securities will dependsolelyon the performance of the Underlying that is the Lowest Performing Underlying on each Calculation Day.You will not benefit in any way from the performance of the better performing Underlyings.Therefore, youwill be adversely affected ifany Underlyingperforms poorly, even if the other Underlyings perform favorablyAll payments on the Securities are subject to the credit risk of BofA Finance LLC (“BofA Finance”), as issuer of the Securities,and Bank of America Corporation (“BAC” or the “Guarantor”), as guarantor of the SecuritiesSecurities will not be listed on any securities exchange The initial estimated value of the Securities as of the Pricing Date is expected to be between $906.75 and $966.75 per Security, which isless than the public offering price listed below.The actual value of your Securities at any time will reflect many factors and cannot be predictedwith accuracy. See “Selected Risk Considerations” beginning on page PS-9 of this pricing supplement and “Structuring the Securities” on page PS-31 ofthis pricing supplement for additional information.The Securities have complex features and investing in the Securities involves ri