A. While it's public and free information, insiders' trading activities (buy or sell their companies' shares) could be found at SEC's Edgar database, it's time consuming and nearly impossible for an individual investor to sort through the 200,000 new trades made by insiders annually.
The good news is there are a few websites dedicated to tracking insiders' activities, especially stock buying activities, as Peter Lynch once said: "insiders might sell their shares for any number of reasons, but they buy them for only one: They think the price will rise."
Below is some of the best of such websites. The bad news, all of them require a subscription with different prices and levels of services:
- Insider Monkey: the least expensive, but offers not many ways to play around the data
- J3 Services: more expensive, but offers more ways to slice and dice the data
- Sec Form 4: the most expensive, for institutional investors, but curates data in far more ways and offers up many more predefined lists
- Insider Score: for institutional investors only
- Insider Insights: has a free service with bare bone services