Business Context and Reporting Period
This Form 6-K filing by Banco Santander, S.A. is dated April 14, 2026, and covers the month of April 2026. The report discloses "Other Relevant Information" regarding a formal notification from Banco de España concerning new binding Minimum Requirement for Own Funds and Eligible Liabilities (MREL) for the Resolution Group. The Resolution Group includes Banco Santander and key subsidiaries such as Santander Consumer Finance, Open Bank, and Santander Totta.
Key Financial Metrics and Regulatory Requirements
The filing details updated MREL requirements expressed as percentages of Total Risk-Weighted Assets (TREA) and Leverage Ratio Exposure (LRE). As of December 31, 2025, the Resolution Group's TREA was EUR 425,530 million, and LRE was EUR 1,108,944 million. The filing confirms that the group's capital structure met both Total and Subordinated MREL requirements as of that date.
| Requirement Type | New Requirement | Prior Requirement | Actual (Dec 31, 2025) |
|---|---|---|---|
| Total MREL (TREA) | 31.17% | 31.92% | 39.73% |
| Subordinated MREL (TREA) | 11.56% | 10.95% | 34.04% |
| Total MREL (LRE) | 11.86% | 12.75% | 15.25% |
| Subordinated MREL (LRE) | 6.11% | 6.27% | 13.06% |
The Combined Buffer Requirement applicable to TREA is 4.42%, bringing the Total MREL plus Combined Capital Buffer to 35.59%.
Material Changes Versus Prior Period
The new MREL notification supersedes the previous notification announced on May 7, 2025. Key changes include:
- Reduction in Requirements: The Total MREL requirement in terms of TREA decreased from 31.92% to 31.17%, and Subordinated MREL increased slightly from 10.95% to 11.56%.
- Strategic Drivers: The adjustment incorporates the completion of the sale of 49% of Santander Bank Polska S.A. to Erste Group Bank AG. It also reflects a 20% downward adjustment of the market confidence charge and an adjusted regime for eligible liabilities in Banco Santander México.
Guidance, Outlook, and Risks
The filing does not provide forward-looking financial guidance, revenue forecasts, or profit outlooks. It explicitly states that past performance is not indicative of future results and that the document does not constitute a profit forecast. The primary risk disclosed relates to regulatory compliance, though the company confirms it currently meets the new binding requirements. The filing includes standard disclaimers regarding non-IFRS financial indicators and third-party information.
Investor Verification Checklist
- Verify the impact of the 49% stake sale in Santander Bank Polska on the group's overall risk-weighted assets.
- Confirm the continued compliance with the new Subordinated MREL requirement of 11.56% (TREA) in upcoming quarterly reports.
- Review the 2025 Annual Report (published February 25, 2026) for detailed reconciliations of Alternative Performance Measures (APMs) mentioned in the filing.
- Monitor future notifications from the Single Resolution Board (SRB) regarding the Multiple Point of Entry (MPE) resolution strategy.