Robinhood is a FINRA-regulated broker-dealer, registered with the U.S. Securities and Exchange Commission, and is a member of the Securities Investor Protection Corporation.[5][3] The company's revenue comes from three main sources: interest earned on customers' cash balances, selling order information to high-frequency traders (a practice for which the SEC opened an investigation into the company in September 2020)[6] and margin lending.[5][8] As of 2020, Robinhood had 13 million users.[9][10]