美国银行美股招股说明书(2025-09-29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 Digital Return Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index, due May 5, 2027 (the “Notes”) are expectedto price on October 31, 2025 and expected to issue on November 5, 2025. Approximate 18 month term. If the Ending Value of each Underlying is greater than or equal to 70% of its Starting Value, at maturity, you will receive a digital payment of $1,135.00 per $1,000.00 in principalamount of Notes. IfanyUnderlying declines by more than 30% from its Starting Value, at maturity your investment will be subject to 1:1 downside exposure to decreases in the value of the LeastPerforming Underlying, with up to 100% of the principal at risk. Any payment on the Notes is 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 initial estimated value of the Notes as of the pricing date is expected to be between $930.00 and $980.00 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-6of this pricing supplement and “Structuring the Notes” on page PS-21of 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-6of 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 ordetermined 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 $993.00 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 $7.00, resulting in proceeds, before expenses, to BofA Finance of as low as $993.00 per$1,000.00 in principal amount of Notes. (3)In addition to the underwriting discount above, if any, an affiliate of BofA Finance will pay a referral fee of up to $3.75 per $1,000.00 in principal amount of the Notes in connection withthe distribution of the Notes to other registered broker-dealers. Digital Return 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 Digital Return Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index accompanying prospectus, with respect to the Notes occurs and is continuing, the amount payable to a holder of the Notes upon any acceleration permittedunder the senior indenture will be equal to the amount described under the caption “Redemption Amount” above, calculated as though the date of accelerationwere the Maturity Date of the Notes and as though the Valuation Date were the third Trading Day prior to the date of acceleration. In case of a default in thepayment of the Notes, whether at their maturity or upon acceleration, the Notes will not bear a default interest rate. * Subject to change. Payment on the Notes depends on the credit risk of BofA Finance, as Issuer, and BAC, as Guarantor, and on the performance of each Underlying. 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 typically lower than the rate it would pay when it issues conventional fixed or floating rate debt securities. Thisdifference in funding rate, as well as the underwriting discount, if any, the refferal fee and the hedging related charges described below (see “Risk Factors” beginni