Company: BCDRF
Filing Date: 2025-02-13
Form Type: 6-K
Source: 0000950103-25-001941
Chunk: 0

Company: Banco Santander, S.A.
Filing Date: 2025-02-13
Form: 6-K
Chunk 0
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<div align='center'>FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of February, 2025

Commission File Number: 001-12518

Banco Santander, S.A.

(Exact name of registrant as specified in its charter)

Ciudad Grupo Santander

28660 Boadilla del Monte (Madrid) Spain

(Address of principal executive office)</div>

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

| Form 20-F | X |     | Form 40-F |

<div align='center'>Banco Santander, S.A.

TABLE OF CONTENTS</div>

Item 1

Banco Santander, S.A., (“Santander”
or the “Offeror”) in accordance with the provisions of the securities market legislation, communicates the following:

<div align='center'>OTHER RELEVANT INFORMATION</div>

Further to the communication made on
6 February 2025 (registered under number 2585) regarding the invitation by Santander to holders of its outstanding €1,500,000,000
3.250 per cent. Subordinated Instruments due April 2026 (ISIN: XS1384064587) (the "EUR 2026 Notes") and €1,000,000,000
3.125 per cent. Subordinated Instruments due January 2027 (ISIN: XS1548444816) (the "EUR 2027 Notes" and, together with
the EUR 2026 Notes, the "Notes" and each a “Series”) to tender any and all of such Notes for purchase
by the Offeror for cash, in accordance with the terms of the tender offer memorandum dated 6 February 2025 (the "Tender Offer Memorandum") (the "Offers"), the Offeror now announces the results of the Offers.

Capitalised terms used but not otherwise
defined in this announcement shall have the meaning given to them in the Tender Offer Memorandum.

The Expiration Time for the Offers was
5.00 p.m. (CET) on 12 February 2025.

The Offeror hereby announces that it
will accept for purchase in accordance with the terms and subject