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 October, 2020

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)

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  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ☐            No  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes  ☐            No  ☒

Banco Santander, S.A.

TABLE OF CONTENTS

Item 1

Banco Santander, S.A. (“Banco Santander” or the “Bank” or “Santander”), pursuant to the provisions of the Spanish Securities Market Act (Ley del Mercado de Valores), hereby announces the following:

OTHER RELEVANT INFORMATION

At the general meeting held today, shareholders passed a resolution to increase share capital against reserves (hereinafter, the ‘Capital Increase’). If approved by the Bank’s Executive Committee, the Capital Increase will be used to pay out approximately 0.10 euros per share in the form of newly issued shares as announced on 29 July 2020. The timeline for the Capital Increase is as follows:

Boadilla del Monte (Madrid), 27 October, 2020

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.