A lot of my stocks have what I call an "insider margin of safety".  These are stocks where insiders, especially high-ranking officers like the CEO or Chairman, have purchased unusually large amounts of shares in the open market.  For an explanation of why I like these stocks, click here.

All insider information is submitted directly to the SEC.  Searching through the SEC can be quite tedious, however.  Fortunately, there are many websites that aggregate this information for you.  Most of them charge money, but here are two excellent free sites: