美国银行美股招股说明书(2026-04-20版)

Preliminary Pricing Supplement - Subject to Completion(To Prospectus dated December 8, 2025,Series A Prospectus Supplement dated December 8, 2025 andProduct Supplement STOCK-1 dated December 8, 2025) Contingent Income (with Memory Feature) Auto-Callable Yield Notes Fully and Unconditionally Guaranteed by Bank of America Corporation Linked to the Common Shares of Cameco Corporation• The Contingent Income (with Memory Feature) Auto-Callable Yield Notes Linked to the Common Shares of Cameco Corporation, due May 3, 2029(the “Notes”) are expected to price on April 28, 2026 and expected to issue on April 30, 2026.•Approximate 3 year term if not called prior to maturity.•Payments on the Notes will depend on the performance of the common shares of Cameco Corporation (the “Underlying Stock”).•Contingent coupons payable quarterly if the Observation Value of the Underlying Stock on the applicable Observation Date is greater than or equalto 50.00% of its Starting Value, assuming the Notes have not been called. The coupon per $1,000.00 in principal amount of Notes payable on therelated Contingent Payment Date, if applicable, will equal (i) theproductof between [$34.375 and $36.875]timesthe number of ContingentPayment Dates that have occurred up to the relevant Contingent Payment Date (inclusive of the relevant Contingent Payment Date)minus(ii) thesum of all Contingent Coupon Payments previously paid. The actual contingent coupon rate will be determined on the pricing date.•Beginning with the October 28, 2026 Call Observation Date, automatically callable quarterly for an amount equal to the principal amount plus therelevant Contingent Coupon Payment, if the Observation Value of the Underlying Stock is greater than or equal to 100.00% of its Starting Value onany Call Observation Date.•Assuming the Notes are not called prior to maturity, if the Underlying Stock declines by more than 50% from its Starting Value, at maturity yourinvestment will be subject to 1:1 downside exposure to decreases in the value of the Underlying Stock, with up to 100% of the principal at risk;otherwise, at maturity, you will receive the principal amount. At maturity you will also receive a final Contingent Coupon Payment if the ObservationValue of the Underlying Stock on the final Observation Date is greater than or equal to 50.00% of its Starting Value.•All payments on the Notes are subject to the credit risk of BofA Finance LLC (“BofA Finance” or the “Issuer”), as issuer of the Notes, and Bank ofAmerica Corporation (“BAC” or the “Guarantor”), as guarantor of the Notes.•The Notes will not be listed on any securities exchange.•CUSIP No. 09711QLY7. The initial estimated value of the Notes as of the pricing date is expected to be between $920.00 and $970.00 per $1,000.00 in principal amountof Notes, which is less than the public offering price listed below.The actual value of your Notes at any time will reflect many factors and cannot bepredicted with accuracy. See “Risk Factors” beginning on page PS-10 of this pricing supplement and “Structuring the Notes” on page PS-16 of thispricing supplement for additional information. There are important differences between the Notes and a conventional debt security. Potential purchasers of the Notes should consider theinformation in “Risk Factors” beginning on page PS-10 of this pricing supplement, page PS-4 of the accompanying product supplement, pageS-7 of the accompanying prospectus supplement, and page 7 of the accompanying prospectus. None of the Securities and Exchange Commission (the “SEC”), any state securities commission, or any other regulatory body has approved ordisapproved of these securities or determined if this pricing supplement and the accompanying product supplement, prospectus supplement andprospectus is truthful or complete. Any representation to the contrary is a criminal offense. (1)Certain dealers who purchase the Notes for sale to certain fee-based advisory accounts may forgo some or all of their selling concessions, fees orcommissions. The public offering price for investors purchasing the Notes in these fee-based advisory accounts may be as low as $975.00 per$1,000.00 in principal amount of Notes.(2)The underwriting discount per $1,000.00 in principal amount of Notes may be as high as $25.00, resulting in proceeds, before expenses, to BofAFinance of as low as $975.00 per $1,000.00 in principal amount of Notes.The Notes and the related guarantee: Selling Agent Contingent Income (with Memory Feature) Auto-Callable Yield Notes Linked to the Common Shares of Cameco Corporation Terms of the Notes Contingent Income (with Memory Feature) Auto-Callable Yield Notes Linked to the Common Shares of Cameco Corporation Observation Dates, Contingent Payment Dates, Call Observation Datesand Call Payment Dates Contingent Income (with Memory Feature) Auto-Callable Yield Notes Linked to the Common Shares of Cameco Corporation * The Call Observation Dates are subject to postponement as