I have created a website allowing retail investors to track insider stock transactions, for both US and european markets. Up until now, nearly all websites focused on SEC forms, while making sense of filings in Europe is sometimes even harder. I cover the US and six major european markets (France, Germany, Switzerland, Spain, Belgium & the Netherlands), with more on the way.

I have created it with Django, nginx and Postgresql. It is hosted on Hetzner, which I couldn't recommend enough.

https://www.insiderscreener.com