It is more difficult to do research on a private company since private companies are not required to make public financial filings with the SEC. But it's not impossible. The easiest way to get your hands on private company research is to sign up for a business information service that specializes in private company research. These services have their own editorial and investigative staff to gain financial and business information about private companies. You can then pay the service for its own private company research, either by the month or by the specific download.