When searching for information about companies, it is important to know whether the company you are searching for is a public or private entity. Knowing this will help you get a sense of how much and what kind of information you will be able to find.
In terms of research, the main difference between the two is how much information is available to the public. Public companies are ones that are required to file certain documents and data with the U.S. Securities and Exchange Commission (SEC). When researching public companies, you will be able to find financial information, how they are organized, annual reports, and more. Private companies, on the other hand, are not required to submit the same files to the SEC and usually are required to report very little information to state governments. There is much less publicly available information about these firms especially if they are very small and fall into a niche industry. It is also important to note that information about a private company may not be available because they do not want the public to know much about them.
In general, keep in mind that when you are researching companies (especially private ones) you will likely not find all of the information you want or build a complete picture of the company. The information you need will come from multiple places that you will need to piece together like a puzzle. Think creatively when researching and keep an open mind when exploring resources -- you never know what you might find.
Before you begin searching for information about your chosen company, ask yourself the following questions:
If you are not sure what you are looking for, ask yourself if you already know about or want to find out about the following topics:
Don't hesitate to Contact a Librarian if you are having difficulty finding relevant sources.