e.g https://shareseer.com/search?q=BERKSHIRE+HATHAWAY+INC+13F
Perform due diligence before purchasing any stock e.g https://shareseer.com/search?q=gs
Track all institutions by aum https://shareseer.com/aum
Follow insider transactions to generate ideas
https://shareseer.com/weekly/insiders/largest
I encourage you to create an account to get full access to the site at https://shareseer.com/signup