Company: BCDRF
Filing Date: 2025-07-31
Form Type: 6-K
Source: 0000891478-25-000113
Chunk: 88

Company: Banco Santander, S.A.
Filing Date: 2025-07-31
Form: 6-K
Chunk 88
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5
| Key consolidated data 
 Business model        |     | Group financial information |     | Financial information by segment |     | Sustainability       
 Corporate governance |     | Appendix                     |     | Index |
|                       |     |                             |     |                                  |     |                      |     | Main risks and uncertainties |     |       |

#### Main risks and uncertainties
At the date of preparation of this management report, Grupo Santander considers that the important factors highlighted in the ‘Forward-looking statements’ part of the ‘ Importan t Information ’ section, as well as other unknown or unpredictable factors, could affect our future development and results and could lead to outcomes materially different from what our forward-looking statements anticipate, expect, project or assume.

These are not the only risks that the bank may face. Other unknown risks or those not considered relevant at this time, may materialize in the future.

Our geographic and business diversification protects us, to some extent, from adverse circumstances and enables us to resiliently face them. Although it is difficult to make estimations in the current environment, our strategy and business model are a clear competitive advantage.

#### January - June202595
| Key consolidated data Business model |     | Group financial information |     | Financial information by segment |     | Sustainability Corporate governance |     | Appendix                                        |     | Index |
|                                      |     |                             |     |                                  |     |                                     |     | Other disclosures required by the Bank of Spain |     |       |

#### Other disclosures required by the Bank of Spain
Disclosures required under Bank of Spain Circular 6/2012 on sector and geographic concentration of risk

#### Concentration of risk
The breakdown at 30 June 2025 of the concentration of the Group's risk, by activity and geographic location of counterparties, is as follows:

| Million euros                                                                                                   |     | 30/06/2025 |           |         |       |         |         |                            |         |        |         |         |         |                   |         |         |
|                                                                                                                 |     | Total      |           |         | Spain |         |         | Rest of the European Union |         |        | America |         |         | Rest of the world |         |         |
| Central banks and Credit institutions                                                                           |     |            |           | 347,431 |       |         |  74,023 |                            |         | 66,508 |         |         | 126,319 |                   |         |  80,581 |
|