Company: BCDRF
Filing Date: 2025-10-29
Form Type: 6-K
Source: 0000891478-25-000132
Chunk: 34

Company: Banco Santander, S.A.
Filing Date: 2025-10-29
Form: 6-K
Chunk 34
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) and in Poland. Q3 2025 was characterized by a moderate global economic slowdown. Financial markets are reaching new all-time highs, supported by several factors such as expectations of further interest

rate cuts, declining inflation in most of the countries where Santander operates, and optimism around productivity gains from the use of artificial intelligence. However, concerns persist over geopolitical and trade tensions, though easing slightly compared to previous quarters, and over the sustainability of fiscal policies in certain countries. In this context, equity markets performed well with widespread gains. As at 30 September 2025, Santander’s share price had increased by 98.8%, significantly outperforming the performance of both the sector and the broader European market. In the banking sector, the Eurostoxx Banks, the eurozone's main index, increased 59.9% year to date, while the DJ Stoxx Banks rose 46.5% and the MSCI World Banks increased 34.9%. The other main indices also closed up in the quarter, but rose by less (Ibex 35 +33.5% and DJ Stoxx 50 +7.5%).

| Share price       |     |                   |
| START31/12/2024   |     | END30/09/2025     |
| €4.465            |     | €8.874            |
| Maximum30/09/2025 |     | Minimum02/01/2025 |
| €8.882            |     | €4.255            |

| Comparative share performance |

| 26 |     | January- September2025 |

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

Market capitalization and trading As at 30 September 2025, Santander’s market capitalization of EUR 132,092 million was the largest in the eurozone and the 16 th largest in the world among financial institutions. The share’s weighting in the Stoxx Europe 600 Banks index was 8.5% and 13.5% in the Euro Stoxx Banks. In the domestic market, its weight in the Ibex 35 was 16.7% as at 30 September 2025. A total of 5,961 million shares