Company: BCDRF
Filing Date: 2025-02-28
Form Type: 6-K
Source: 0000950103-25-002673
Chunk: 0

Company: Banco Santander, S.A.
Filing Date: 2025-02-28
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. (the “Bank”or “Banco Santander”), in compliance with the Securities Market legislation, hereby communicates the following:

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

In accordance with the provisions of
the Spanish Companies Law, Banco Santander hereby attaches the full text of the notice of call to the ordinary general shareholders’
meeting of the Bank to be held on an exclusively remote basis, on 3 April 2025 at 12:30 p.m. (CEST), on first call, or on 4 April 2025,
at the same time, on second call. The meeting is expected to be held on second call.

The proposed resolutions, the
required reports on the items of the agenda and the remaining documentation relating to the meeting shall be available as from this date
on the corporate website (www.santander.com).

Boadilla del Monte (Madrid), 28 February 2025

BANCO SANTANDER, S.A.

Call to ordinary general shareholders’
meeting

The board of directors has resolved to call the shareholders
to an ordinary general meeting to be held on an exclusively remote basis,

i.e. without the physical attendance of shareholders, their proxies or
guests, on 4 April 2025, at 12:30 p.m. (CEST), on second call, if the required quorum has not been reached to be able to hold
the meeting on first call, which this notice also calls to be held, also