美国银行美股招股说明书(2025-12-05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 jurisdiction Linked tothe Common Stock of Apple Inc.• The Contingent Income Auto-Callable Yield Notes Linked to the Common Stock of Apple Inc., due January 22, 2027 (the “Notes”) are expected toprice onDecember 17, 2025 and expected to issue on December 22, 2025. Approximate 13 month term if not called prior to maturity. Payments on the Notes will depend on the performance ofthe common stock of Apple Inc. (the “Underlying Stock”). Contingent coupon rate of 10.70% per annum (0.8917% per month) payable monthly if the Observation Value of the Underlying Stock on the applicable ObservationDate is greater than or equal to 75.00% of its Starting Value, assuming the Notes have not been called. Beginning with the June 17, 2026 Call Observation Date, automatically callable monthly for an amount equal to the principal amount plus the relevant ContingentCoupon Payment, if the Observation Value of the Underlying Stock is greater than or equal to 100.00% of its Starting Value on any Call Observation Date. 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 theprincipal amount. At maturity you will also receive a final Contingent Coupon Payment if the Observation Value of the Underlying Stock on the final Observation Dateis greater than or equal to 75.00% 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 $940.00 and $990.00 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 predictedwith accuracy. See “Risk Factors” beginning on page PS-9 of this pricing supplement and “Structuring the Notes” on page PS-15of this pricing supplement for 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 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. Observation Dates, Contingent Payment Dates,Call Observation Dates * The Call Observation Dates are subject to postponement as set forth in “Description of the Notes—Certain Terms of the Notes—Events Relating to ObservationDates” on page PS-21 of theaccompanying product supplement, with references to “Observation Dates” being read as references to “Call Observation 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 Underlying Stock. Theeconomic terms of the Notes are based on BAC’s internal funding rate, which is the rate it would pay to borrow funds through the issuance of market-linkednotes, and the economic terms of certain related hedging arrangements BAC’s affiliates enter into. BAC’s internal funding rate is typically lower than the rate itwould pay when it issues conventional fixed or floating rate debt securities. This difference in funding rate, as well as the underwriting discount, if any, the referralfee and the hedging related charges described below (see “Risk Factors” beginning on page PS-9), will reduce the economic terms of the Notes to you and the The initial estimated value range of the Notes is set forth on the cover page of this pricing supplement. The final pricing supplement will set forth the initialestimated value of the Notes as of the pricing date. For more information about the initial estimated value and the structuring of the Notes, see “Risk Factors”beginning on page PS-9and “Structuring the Notes” on page PS-15. Contingent Coupon Payment and Redemption Amount Determination Total Contingent Coupon Payment Examples The table below illustrates the hypothetical total Contingent Coupon Payments per $1,000.00 in principal amount of Notes over the term of the Notes, based onthe Contingent Coupon Payment of $8.917, depending on how many Contingent Coupon Payments are payable prior to an Automatic Call or maturity. Dependingon the performance of the Underlying Stock, you may not receive any Contingent Coupon Payments during the term of the Notes. Hypothetical Payout Profile and Examples of Payment