https://robintrack.net/symbol/BNTX
You can track ownership by stock in Robinhood accounts. Useful for seeing where retail investors' heads are at. They've been very very right in the past two months - Robinhooders piled into airlines etc at the bottom - and now giving back some of those gains. If you don't want to be in names most exposed to retail traders, or if you do, this tool is helpful.