美国银行美股招股说明书(2025-09-16版)

This pricing supplement, which is not complete and may be changed, relates to an effective Registration Statement under the Securities Act of 1933. This pricingsupplement and the accompanying product supplement, prospectus supplement and prospectus are not an offer to sell these Notes in any country or jurisdictionwhere such an offer would not be permitted. Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities SelectSector SPDR®Fund and the VanEck®Semiconductor ETF •The Contingent Income Auto-Callable Yield Notes Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities Select Sector SPDR®Fundand the VanEck®Semiconductor ETF, due September 24, 2030 (the “Notes”) are expected to price on September 19, 2025 and expected to issue on September 24,2025.• Approximate 5 year term if not called prior to maturity. Payments on the Notes will depend on the individual performance of the SPDR®S&P Regional Banking ETF, the Utilities Select Sector SPDR®Fund and theSemiconductor ETF (each an “Underlying”). •Contingent coupon rate of 9.50% per annum (0.7917% per month) payable monthly if the Observation Value ofeachUnderlying on the applicable Observation Dateis greater than or equal to 70.00% of its Starting Value, assuming the Notes have not been called. •Beginning with the September 21, 2026 Call Observation Date, automatically callable monthly for an amount equal to the principal amount plus the relevantContingent Coupon Payment, if the Observation Value of each Underlying is greater than or equal to 100.00% of its Starting Value on any Call Observation Date. •Assuming the Notes are not called prior to maturity, ifanyUnderlying declines by more than 40% from its Starting Value, at maturity your investment will be subject to1:1 downside exposure to decreases in the value of the Least Performing Underlying, with up to 100% of the principal at risk; otherwise, at maturity, you will receivethe principal amount. At maturity you will also receive a final Contingent Coupon Payment if the Observation Value ofeachUnderlying on the final Observation Dateis greater than or equal to 70.00% 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 of AmericaCorporation (“BAC” or the “Guarantor”), as guarantor of the Notes. The initial estimated value of the Notes as of the pricing date is expected to be between $900.00 and $950.00 per $1,000.00 in principal amount ofNotes, 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 be predicted with accuracy. See “Risk Factors” beginning on page PS-11 of this pricing supplement and “Structuring the Notes” on page PS-29of this pricing supplement foradditional information.There are important differences between the Notes and a conventional debt security. Potential purchasers of the Notes should consider the information in “Risk Factors” beginning on page PS-11of this pricing supplement,page PS-5 of the accompanying product supplement, page S-6 ofthe 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 or disapproved of these securities or determined if this pricing supplement and the accompanying product supplement, prospectus supplement and prospectus is truthful orcomplete. 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 $958.75 per $1,000.00 inprincipal amount of Notes. (2)The underwriting discount per $1,000.00 in principal amount of Notes may be as high as $41.25, resulting in proceeds, before expenses, to BofA Finance ofas low as $958.75 per $1,000.00 in principal amount of Notes. Selling Agent Contingent Income Auto-Callable Yield Notes Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities SelectSector SPDR®Fund and the VanEck®Semiconductor ETF Terms of the Notes Contingent Income Auto-Callable Yield Notes Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities SelectSector SPDR®Fund and the VanEck®Semiconductor ETF Observation Dates, Contingent Payment Dates, Call Observation Dates andCall Payment Dates Contingent Income Auto-Callable Yield Notes Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities SelectSector SPDR®Fund and the VanEck®Semiconductor ETF Contingent Income Auto-Callable Yield Notes Linked to the Least Performing of the SPDR®S&P Regional Banking ETF, the Utilities SelectSector SPDR®