Company: BCDRF
Filing Date: 2025-10-31
Form Type: 424B5
Source: 0001193125-25-260533
Chunk: 9

Company: Banco Santander, S.A.
Filing Date: 2025-10-31
Form: 424B5
Chunk 9
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 July 31, 2025
(Accession No. 0000891478-25-000113); (iii) Report on Form 6-K filed with the SEC on October 29, 2025
(Accession No. 0000891478-25-000132) and (iv)
Report on Form 6-K filed with the SEC on October 29, 2025(Accession
No. 0000891478-25-000138).

We also incorporate by
reference all subsequent annual reports of the Group filed on Form 20-F and any future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, and
certain reports on Form 6-K, if they state that they are incorporated by reference into the registration statement of which this prospectus supplement forms a part, that we furnish to the SEC after the date of
this prospectus supplement and until the Underwriters sell all of the Notes.

Upon written or oral request, we will provide free of charge
a copy of any or all of the documents that we incorporate by reference into this prospectus supplement, other than exhibits which are not specifically incorporated by reference into this prospectus supplement. To obtain copies you should contact us
at Investor Relations, Ciudad Grupo Santander, Avenida de Cantabria s/n, 28660 Boadilla del Monte, Madrid, Spain (telephone: (011)
34-91-259-6520).

FORWARD-LOOKING STATEMENTS

From time to time, we may make statements, both written and oral, regarding assumptions, projections, expectations, intentions or beliefs
about future events. These statements constitute “forward-looking statements” for purposes of the Private Securities Litigation Reform Act of 1995. We caution that these statements may and often do vary materially from actual results.
Accordingly, we cannot assure you that actual results will not differ materially from those expressed or implied by the forward-looking statements. You should read the sections entitled “Risk Factors” in this prospectus supplement and
the accompanying prospectus, and “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” in our Annual Report on Form 20-F for the year ended December 31,
2024, and in Part 2 of the Group’s Report on Form 6-K filed with the SEC on July 31, 2025 (Accession