According to the #Grayscale website, #Grayscale currently holds 566,973 $BTC($23.21B), decreasing ~52,227 $BTC ($2.14B) since the ETF was passed.

And iShares(Blackrock) holds 33,431 $BTC($1.37B), Fidelity holds 24,857 $BTC($1.02B), Bitwise holds 10,152 $BTC($415.6M).