Company: BCDRF
Filing Date: 2025-10-29
Form Type: 6-K
Source: 0000891478-25-000132
Chunk: 25

Company: Banco Santander, S.A.
Filing Date: 2025-10-29
Form: 6-K
Chunk 25
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| CET1 ratio performance |
| %                      |

Note: Phased-in ratios are calculated in accordance with the transitory treatment of the CRR. Does not include any expected impacts from the recently announced inorganic transactions.

1. Capital distribution includes deduction for the accrual of shareholder remuneration and AT1 costs.

2. According to a resolution from Banco de España in October 2024, from 1 October 2025 a countercyclical buffer of 0.50% over the exposures located in Spain will be activated. The impact at the Group level is +12 bps to the countercyclical buffer requirement.

3. Our current ordinary shareholder remuneration policy is to distribute approximately 50% of Group reported profit (excluding non-cash, non-capital ratios impact items), distributed approximately 50% in cash dividend and 50% in share buybacks. Execution of the shareholder remuneration policy is subject to future corporate and regulatory decisions and approvals.

4. Business RWA change net of risk transfer initiatives.

| 20 |     | January- September2025 |

| Significant events    
 Key consolidated data 
 Business model        |     | Group financial information |     | Financial information by segment |     | Sustainability       
 Corporate governance |     | Appendix |     | Index |
|                       |     | Solvency ratios             |     |                                  |     |                      |     |          |     |       |

Stress test

In August, the European Banking Authority (EBA) published the results of its 2025 EU-wide stress test, which involved the major European banks, in coordination with the European Central Bank (ECB) and the European Systemic Risk Board (ESRB).

This exercise assesses the resilience of these banks' main balance sheet and income statement items under two different macroeconomic scenarios (baseline and adverse).

The balance sheets at the end of 2024 were taken as a starting point and the expected behaviours of business models of each of the banks were compared in order to gauge the expected losses and the ability of the balance sheet to withstand such losses without requiring external support.

On this occasion, as with previous exercises, there was no minimum capital threshold to meet. Instead, results will be taken into account when determining the SREP requirements.

The baseline scenario assumes the most likely economic performance according to the models used by the supervisor. The very unlikely adverse scenario assumes a severe deterioration in both macroeconomic and global financial market conditions. This year's adverse scenario assumes a severe global downturn caused by a