This page includes resources for researching a company. You can use these resources to:
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Public companies have shares of stock or other registered securities that are bought and sold by the public on one of the stock exchanges. The U.S. Securities and Exchange Commission (SEC) requires publicly traded companies to file extensive information with them, which is available online.
Private companies are not traded on any stock exhange. Generally, they do not have to file any documents with the SEC, so it can be more challenging to find information on them.