BlackRock's ETF holdings surpassed grey release funds for the first time, according to Arkham data. BlackRock's ETF IBIT and ETHA on-chain holdings just surpassed grey release ETFs GBTC, BTC Mini, ETHE and ETH Mini to become the largest entity among collective holders. BlackRock's ETF holdings were $21,217,107,987, and grey release's ETF holdings were $21,202,480,698.