Private companies are not publicly traded and not required to file detailed financial information with the SEC. Finding in-depth information on a private company can be challenging.
Try pulling pieces of information from multiple sources
All 50 states make some level of private business incorporation information available online. In a few instances only limited information (such as name availability) is retrievable.
A company's website can be a great place to find vital information about the company, including the names of their executives, press releases and annual reports if the company is public.
Some additional sources include: