According to Lookonchain, #Grayscale currently holds 566,973 $BTC($23.21B), sells ~52,227 $BTC ($2.14B) since the ETF approval.
iShares (BlackRock): 33,431 BTC
Fidelity: 24,857 BTC
Bitwise: 10,152 BTC
ARK21: 7,565 BTC
Invesco Galaxy: 4,619 BTC
VanEck: 2,207 BTC
Valkyrie: 1,737 BTC
Franklin: 1,160 BTC