Company: BCDRF
Filing Date: 2025-07-30
Form Type: 6-K
Source: 0000950103-25-009476
Chunk: 0

Company: Banco Santander, S.A.
Filing Date: 2025-07-30
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 July, 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. (“Banco Santander” or the “Bank”), in compliance with the Securities Market                                                   
 legislation, hereby communicates the following:                                                                                               |
| inside                                                                                                                                        
 information                                                                                                                                   |
| In application                                                                                                                                
 of the Bank’s current shareholder remuneration policy, consisting of a total shareholder remuneration target of c. 50% of the Group’s         
 reported profit (excluding noncash and non-capital ratios), split approximately in equal parts in cash dividend payments and share buybacks,  
 the board of directors  approved to implement a share repurchase programme for an amount equivalent to c. 25% of the Group’s                  
 underlying profit in the first half of 2025 (i.e. a programme of approximately 1,700 million euros). The appropriate regulatory authorization 
 for the new programme has already been obtained and its execution will therefore commence from tomorrow as detailed below.                    |
| First                                                                                                                                         
 Buyback Programme for 2025 results                                                                                                            
 The                                                                                                                                           
 Buyback Programme will be executed pursuant to the resolutions adopted by the general shareholders’ meeting held on 31 March                  
 2023 and will have the following characteristics:                                                                                             
 -	    Purpose                                                                                                                                 
 of the Buyback Programme: to reduce the Bank’s share capital through the redemption of the shares acquired under the Programme                
 in the share capital reduction approved by the 2025 Annual Shareholders' Meeting under item 6ºB of the agenda.                                
 -	    Maximum                                                                                                                                 
 investment: the Buyback Programme will have a maximum monetary amount