The UK conduct regulator for banks, payment firms, asset managers and crypto-asset firms — sets the post-Brexit UK rulebook for market integrity and consumer protection.
The Financial Conduct Authority (FCA) is the UK conduct regulator for around 50,000 financial firms — banks, payment institutions, e-money issuers, asset managers, insurers, and registered crypto-asset firms — and the prudential supervisor for the smaller firms not covered by the Prudential Regulation Authority (PRA). It administers the FCA Handbook, including the Senior Managers and Certification Regime (SMCR), MAR-equivalent rules on market abuse, and the consumer-duty framework.
The UK retained EU financial-services rules at the moment of Brexit and has since selectively diverged — most notably with the Edinburgh Reforms, the Future Regulatory Framework and a distinct UK MiFIR/MAR codification. European institutions with UK passport holders or UK branches must track FCA rules in parallel with EU rules, with the FCA Handbook as the operative source of truth.
Marengo MAR-supervision and Bucephalus sanctions/AML rule sets can be configured for FCA-handbook-aligned UK supervision in parallel with EU-rule operation.
