Start by examining what the company says about itself on its website, in its annual report, SEC filings and press releases. Look at the latest Conference Call (or Earnings Call) transcript on the company's Investor Relations page.
In the company's 10-K report pay particular attention to the “Business Overview” section (Item 1) where companies discuss their competitive environment and the “MD&A” section (Item 7) where they discuss their financial condition and the risk factors that might affect company performance.
The following databases offer profiles and data on public companies, both U.S. and international.
Trade journals, magazines written for practitioners in an industry, cover news and offer analysis from industry insiders.