Business information -- such as company histories and financials, market research reports, SWOT analyses, etc. -- is typically written by industry analysts and occasionally by journalists. You may or may not be able to find information on a particular company depending on whether it is public or private, its size or location, and also on its visibility in the news media.
You might use business information:
(Adapted from Temple University's Advertising Campaigns Libguide)
Research on private companies (particularly small private companies) can be challenging, since private companies are not required to make available the same information required of public companies. It is often necessary to search in a number of different sources for any available information, including the company's website and local/regional news sources.
If, after searching in the databases listed in the box above, you are unable to locate any information about your private company, try the following databases.