Whale Wisdom https://whalewisdom.com is a free website that allows the public to see who holds and owns stock of a publicly traded corporation.  It is useful for research in that you are able to create an account for free and put in the ticker symbol and research any stock and see who owns it and who sold shares recently.  Much of this information is located in different areas such as the corporate website or the SEC but Whale Wisdom makes it easy to have it all in one place.  Type in the company you are interested in and it will show which hedge funds own the stock and what percentage of total outstanding shares they own.  You can then use this information to find out more about what funds you trust and use that information to help you invest.