美国银行美股招股说明书(2025-11-12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 pricing supplement and theaccompanying product supplement, prospectus supplement and prospectus are not an offer to sell these Notes in any country or jurisdiction where such an offer would not be permitted. Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index The Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index, due May 17, 2029 (the“Notes”) are expected to price on November 14, 2025 and expected to issue on November 19, 2025. ••Approximate 3.5 year term if not called prior to maturity.•Payments on the Notes will depend on the individual performance of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index (each an “Underlying”).•A fixed coupon rate of 6.40% per annum (0.5334% per month) payable monthly, assuming the Notes have not been called.•Beginning on May 19, 2026, callable monthly at our option for an amount equal to the principal amount plus the Fixed Coupon Payment.•Assuming the Notes are not called prior to maturity, ifanyUnderlying declines by more than 30% from its Starting Value, at maturity your investment will be subject to 1:1 downsideexposure to decreases in the value of the Least Performing Underlying, with up to 100% of the principal at risk; otherwise, at maturity, you will receive the principal amount. Atmaturity you will also receive the final Fixed Coupon Payment regardless of the performance of the Least Performing Underlying.•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 America Corporation (“BAC” or the“Guarantor”), as guarantor of the Notes.•The Notes will not be listed on any securities exchange.•CUSIP No. 09711KX50. The initial estimated value of the Notes as of the pricing date is expected to be between $910.00 and $960.00 per $1,000.00 in principal amount of Notes, which is less than thepublic 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-10 of this pricing supplement and “Structuring the Notes” on page PS-25of this pricing supplement for additional 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-10of this pricing supplement, page PS-5 of the accompanying product supplement, page S-6 of the accompanying prospectus supplement, and page 7of 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 or complete. Any representation to the contrary is acriminal offense. (1)Certain dealers who purchase the Notes for sale to certainfee-based advisory accounts may forgo some or all of their selling concessions, fees or commissions. The public offeringprice for investors purchasing the Notes in these fee-based advisory accounts may be as low as $970.00 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 $30.00, resulting in proceeds, before expenses, to BofA Finance of as low as $970.00 per$1,000.00 in principal amount of Notes. Selling Agent Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Terms of the Notes Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Fixed Payment Dates and Call Payment Dates Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Call Payment Dates Any payments on the Notes depend on the credit risk of BofA Finance, as Issuer, and BAC, as Guarantor, and on the performance of the Underlyings. The economic terms of the Notes arebased on BAC’s internal funding rate, which is the rate it would pay to borrow funds through the issuance of market-linked notes, and the economic terms of certain related hedgingarrangements BAC’s affiliates enter into. BAC’s internal funding rate is ty