# EDGAR Filing Document

**Accession Number:** 0000891478
**File Stem:** 0000950103-25-010833
**Filing Date:** 2025-8
**Character Count:** 5788
**Document Hash:** 62b60032ff345cb82c1ba519723ef764
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-25-010833.hdr.sgml**: 20250828

**ACCESSION NUMBER**: 0000950103-25-010833

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250828

**FILED AS OF DATE**: 20250828

**DATE AS OF CHANGE**: 20250828

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Banco Santander, S.A.
- **CENTRAL INDEX KEY:** 0000891478
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMMERCIAL BANKS, NEC [6029]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 132617929
- **STATE OF INCORPORATION:** U3
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-12518
- **FILM NUMBER:** 251267337

**BUSINESS ADDRESS:**
- **STREET 1:** CIUDAD GRUPO SANTANDER
- **STREET 2:** BOADILLA DEL MONTE
- **CITY:** MADRID
- **STATE:** U3
- **ZIP:** 28660
- **BUSINESS PHONE:** 34 91 289 32 80

**MAIL ADDRESS:**
- **STREET 1:** CIUDAD GRUPO SANTANDER
- **STREET 2:** BOADILLA DEL MONTE
- **CITY:** MADRID
- **STATE:** U3
- **ZIP:** 28660

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER SA
- **DATE OF NAME CHANGE:** 20070925

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER CENTRAL HISPANO SA
- **DATE OF NAME CHANGE:** 19990512

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER S A
- **DATE OF NAME CHANGE:** 19931201

**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 August, 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)*

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 <u> X</u> Form 40-F  

**Banco Santander, S.A.**

**TABLE OF CONTENTS**

---

| | |
|:---|:---|
| **Item**  |  |
| 1 | Report of Other Relevant Information dated August 28, 2025 |

---

![](image_001.jpg)

**Item 1**

**Banco Santander, S.A.** (the "**Bank**" or "**Banco Santander**"), in compliance with the Securities Market legislation, hereby communicates the following:

**<u>OTHER RELEVANT INFORMATION</u>**

Reference is made to our notice of inside information of 30 July 2025 (official registry number 2844) (the "**Buyback Commencement Communication**"), relating to the buyback programme of own shares (the "**Buyback Programme**") approved by the Board of Directors of Banco Santander.

Pursuant to article 5 of Regulation (EU) no. 596/2014 on Market Abuse of 16 April 2014, and articles 2.2 and 2.3 of Commission Delegated Regulation (EU) 2016/1052, of 8 March 2016, the Bank informs of the transactions carried out over its own shares between 21 and 27 August 2025 (both inclusive).

The cash amount of the shares purchased to 27 August 2025 as a result of the execution of the Buyback Programme amounts to 297,730,065 Euros, which represents approximately 17.5% of the maximum investment amount of the Buyback Programme. The programme was announced together with its other characteristics through the Buyback Commencement Communication. With these purchases, the Bank has repurchased approximately 14.4% of its outstanding shares as of 2021.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| Date | Security | Transaction | Trading venue | Number of shares | Weighted average<br> price (€) |
| 21/08/ 2025 | SAN | Purchase | XMAD | 560044 | 8.1698 |
| 21/08/ 2025 | SAN | Purchase | CEUX | 112245 | 8.1609 |
| 21/08/ 2025 | SAN | Purchase | TQEX | 36964 | 8.1640 |
| 21/08/ 2025 | SAN | Purchase | AQEU | 40747 | 8.1571 |
| 22/08/ 2025 | SAN | Purchase | XMAD | 200000 | 8.2500 |
| 25/08/ 2025 | SAN | Purchase | XMAD | 851650 | 8.2911 |
| 25/08/ 2025 | SAN | Purchase | CEUX | 75694 | 8.2907 |
| 25/08/ 2025 | SAN | Purchase | TQEX | 30275 | 8.2930 |
| 25/08/ 2025 | SAN | Purchase | AQEU | 42381 | 8.2936 |
| 26/08/ 2025 | SAN | Purchase | XMAD | 1569141 | 8.1363 |
| 26/08/ 2025 | SAN | Purchase | CEUX | 80380 | 8.1356 |
| 26/08/ 2025 | SAN | Purchase | TQEX | 15096 | 8.1396 |
| 26/08/ 2025 | SAN | Purchase | AQEU | 35383 | 8.1401 |
| 27/08/ 2025 | SAN | Purchase | XMAD | 1365019 | 8.0585 |
| 27/08/ 2025 | SAN | Purchase | CEUX | 80181 | 8.0604 |
| 27/08/ 2025 | SAN | Purchase | TQEX | 36377 | 8.0819 |
| 27/08/ 2025 | SAN | Purchase | AQEU | 44988 | 8.0628 |
|  |  |  | **TOTAL** | **5176565** |  |

---

![](image_001.jpg)

**Issuer name**: Banco Santander, S.A. - LEI 5493006QMFDDMYWIAM13

**Reference of the financial instrument**: ordinary shares - Code ISIN ES0113900J37

Detailed information of the transactions carried out within the referred period is attached as Annex I.

Boadilla del Monte (Madrid), 28 August 2025

![](image_001.jpg)

**ANNEX I**

<u>Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 21/08/2025 and 27/08/2025 (both inclusive)</u>

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-21-a-27-ago-2025.pdf)

**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.

---

| | | | | |
|:---|:---|:---|:---|:---|
| | | **Banco Santander, S.A.** | **Banco Santander, S.A.** | **Banco Santander, S.A.** |
| Date: | August 28, 2025 | By: | /s/ Pedro de Mingo Kaminouchi | /s/ Pedro de Mingo Kaminouchi |
|  |  |  | Name: | Pedro de Mingo Kaminouchi |
|  |  |  | Title: | Head of Corporate Compliance |

---