SEC Investment Adviser Public Disclosure (IAPD) Database

Registered investment advisors (RIAs) and investment firms who manage over $100 million in assets must register with the U.S. Securities and Exchange Commission.
SEC IAPD search

FINRA BrokerCheck Database

FINRA is the investment industry’s self-regulatory organization and it maintains a searchable database of approximately 4,430 brokerage firms and 629,530 registered securities representatives.
FINRA BrokerCheck search

State Securities Regulators

Financial advisors who are not required to register with the SEC are still required to register with their state’s regulatory agency. The North American Securities Administrators Association (NASAA) maintains a list of those agencies with links to their searchable databases.
NASAA list of state regulators