13,285 broker-dealers and registered investment advisers (RIAs) indexed by FINRA. BrokerCheck is presented as a search-UI-only product at brokercheck.finra.org; the backing JSON API isn't documented anywhere. The disclosure_fl=Y flag is the regulatory red-flag tripwire that KYC vendors charge $50k+/yr for. 922 firms flagged.
Every record in this dataset can be traced back to its primary source at https://brokercheck.finra.org/. Underlying content is a US federal government work (public domain under 17 USC §105); our derived data is licensed CC0 1.0.