Publicly-traded companies must file financial statements with the Securities and Exchange Commission (SEC), the body that oversees all U.S. stock exchanges. The most useful is the 10-K, an official audited document that includes similar information from a prospectus or annual report, but provides additional updated financial information on corporate activities. Filings can be found at the SEC's Edgar Database.
Other commonly-sought filings include:
These filings collectively are the source material for available financial statements and other factual data in our various subscription databases and many other free web company information sources.