Is there convenient way to find stocks that track investment performance of certain individuals? Like for example, if I want to track performance of Warren Buffet's investments I would follow BRK stock (either A or B) and in general I can get tracking that's "good enough".

Now, let's say I want to do same thing for David Tapper or Carl Icahn... how would I proceed to find stocks that track their performance? I don't necessarily want to track those two (because from what I understand David Tapper runs private fund so he doesn't have stock that tracks him the way BRK tracks Buffet) - I was just using them as an example.

If there is no definite website/page to help with this, how should I start compiling the list (like 1. Buffet - BRK, 2. Carl Icahn - ???)?