Company: BCDRF
Filing Date: 2025-10-31
Form Type: 424B5
Source: 0001193125-25-260533
Chunk: 40

Company: Banco Santander, S.A.
Filing Date: 2025-10-31
Form: 424B5
Chunk 40
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 Rate Notes”) will be issued in an
initial aggregate principal amount of $300,000,000 and will mature on November 6, 2030. From and including the date of issuance, which is expected to be November 6, 2025, interest for each Interest Period (as defined herein) will accrue on
the 2030 Floating Rate Notes at a rate per annum equal to Compounded SOFR (as defined herein) plus a margin of 112 basis points, subject to a minimum interest rate of 0.000%. Interest will be payable quarterly in arrears on February 6,
May 6, August 6 and November 6 of each year (each a “Floating Interest Payment Date”), commencing on February 6, 2026, up to and including November 6, 2030 (the “2030 Floating Rate Notes Maturity
Date”) or any date of earlier redemption; provided, that if any scheduled Floating Interest Payment Date, other than the scheduled 2030 Floating Rate Notes Maturity Date or date of redemption or repayment, would fall on a day that is not a
Business Day, that Floating Interest Payment Date will be postponed to the next succeeding Business Day, except that if that Business Day falls in the next succeeding calendar month, the Floating Interest Payment Date will be the immediately
preceding Business Day. If the 2030 Floating Rate Notes Maturity Date or date of redemption or repayment is not a Business Day, we will pay any interest and principal and/or any amount payable upon redemption of the 2030 Floating Rate Notes, as
applicable, on the next succeeding Business Day, but such final Floating Interest Payment Date will not be postponed and interest on that payment will not accrue from and after the 2030 Floating Rate Notes Maturity Date or date of redemption or
repayment. Interest on the 2030 Floating Rate Notes shall be determined five (5) U.S. Government Securities Business Days (as defined herein) before each Floating Interest Payment Date. Interest will be paid to holders of record of the 2030
Floating Rate Notes in respect of the principal amount thereof outstanding as of the close of business 15 calendar days preceding the relevant Floating Interest Payment Date, whether or not a Business Day.

Each interest period on the 2030 Floating Rate Notes will begin on (and include) a Floating Interest Payment Date (or, in the case of the
first interest period, November 6, 2025) and end on (