Who are the CMA9?
The CMA9 are the nine largest banks and building societies in the UK, by volume of personal and business current accounts. Comprising a combined market share of over 90% of the UK’s consumer and small business bank accounts, they were identified by the CMA as part of the Open Banking initiative to create open-source APIs for the initial rollout of Open Banking in January 2018.
The CMA9 comprise the following banks and building societies:
- AIB Group (UK) plc (trading as First Trust Bank in Northern Ireland)
- Bank of Ireland (UK) plc
- Barclays Bank plc
- HSBC Group
- Lloyds Banking Group plc
- Nationwide Building Society
- Northern Bank Limited (trading as Danske Bank)
- The Royal Bank of Scotland Group plc
- Santander UK plc
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