EDGAR is the Securities & Exchange Commission's (SEC) public website for finding and retrieving required periodic company information filings.
Researchers are often interested in knowing what proportion of a company's stock is held by insiders, large investors, and institutions. Here are some good sources for current information.
The best stock reports are those that contain original, signed narrative analysis and quantitative predictions to go along with the historical financial information.
Conference calls are substantive conversations between company's upper management and investment banking analysts covering topics including:
These are recorded and transcribed, and made available from various sources, including company web sites. Companies don't always keep a backfile of these on their websites, so Factiva can be a good alternative.