This report assesses the types of unmanned aerial vehicles (UAVs) platforms marketed in the United States and the finances of U.S.-headquartered UAV companies. It finds that most companies develop small UAVs, and only a handful develop more complex military systems. The report also finds that most drone manufacturers are privately held, venture-backed companies, many of which were founded after 2010, and investment activity is concentrated around firms that produce smaller UAVs.