美国银行美股招股说明书(2025-10-17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 ofthe Class C Capital Stock of Alphabet Inc., the Common Stock ofAmazon.com, Inc., the Common Stock of Apple Inc. and the Common Stock of Microsoft Corporation •The Auto-Callable Notes Linked to the Least Performing ofthe Class C Capital Stock of Alphabet Inc., the Common Stock of Amazon.com, Inc., the Common Stockof Apple Inc. and the Common Stock of Microsoft Corporation, due October 27, 2028 (the “Notes”) are expected to price on October 24, 2025 and expected to issueon October 29, 2025. Approximate 3 year term if not called prior to maturity. •Payment on the Notes will depend on the individual performance ofthe Class C capital stock of Alphabet Inc., the common stock of Amazon.com, Inc., the commonstock of Apple Inc. and the common stock of Microsoft Corporation (each an “Underlying Stock”). •Beginning with the October 29, 2026 Call Observation Date, automatically callable semi-annually for an amount equal to the applicable Call Amount if, on theapplicable Call Observation Date, the Observation Value of each Underlying Stock is equal to or greater than its Call Value. The Call Observation Dates and CallAmounts are indicated on page PS-5. Assuming the Notes are not called prior to maturity, if the Ending Value of each Underlying Stock is greater than or equal to 100% of its Starting Value, at maturity,you will receive $1,862.50 per $1,000.00 in principal amount of your Notes. •However, assuming the Notes are not called prior to maturity, ifanyUnderlying Stock declines by more than 50% from its Starting Value, at maturity your investmentwill be subject to 1:1 downside exposure to decreases in the value of the Least Performing Underlying Stock, with up to 100% of the principal at risk. Otherwise, if theNotes are not called prior to maturity and the Ending Value of the Least Performing Underlying Stock is less than 100.00% of its Starting Value but greater than orequal to 50% of its Starting Value, at maturity you will receive the principalamount of your Notes.• 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 $902.50 and $942.50 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-9 of this pricing supplement and “Structuring the Notes” on page PS-18of 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-9of 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.Noneof 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 $997.50 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 $2.50, resulting in proceeds, before expenses, to BofA Finance ofas low as $997.50 per $1,000.00 in principal amount of Notes. Selling Agent Auto-Callable Notes Linked to the Least Performing of the Class C Capital Stock of Alphabet Inc., the Common Stock of Amazon.com, Inc., theCommon Stock of Apple Inc. and the Common Stock of Microsoft Corporation Terms of the Notes Auto-Callable Notes Linked to the Least Performing of the Class C Capital Stock of Alphabet Inc., the Common Stock of Amazon.com, Inc., theCommon Stock of Apple Inc. and the Common Stock of Microsoft Corporation Auto-Callable Notes Linked to the Least Performing of the Class C Capital Stock of Alphabet Inc., the Common Stock of Amazon.com, Inc., theCommon Stock of Appl