European Central Bank publishes banking union O-SII scores under enhanced floor methodology

The European Central Bank has published other systemically important institution scores from a banking union perspective under its enhanced floor methodology for assessing O-SII buffer levels notified by national authorities. The scores are based on data as at the end of 2024 and reflect the methodological change introduced in December 2024, which added a banking union perspective alongside the national perspective used since 2016. The publication lists O-SIIs at the highest level of consolidation within the banking union and assigns them to buckets under the ECB floor methodology. BNP Paribas recorded the highest score at 911 basis points and fell into bucket 8. Deutsche Bank AG and Groupe Crédit Agricole followed with scores of 693 and 677 in bucket 6, while Banco Santander, S.A. and Société Générale scored 573 and 498 in bucket 5. The O-SII buffer forms part of the combined buffer requirement alongside the capital conservation buffer, countercyclical capital buffer, systemic risk buffer and the buffer for global or other systemically important institutions. Scores are shown in descending order and rounded to the nearest integer. Two O-SIIs were excluded because M&A transactions in 2025 meant their scores were no longer representative of their systemic importance. The ECB said the banking union perspective O-SII scores will be published annually.