Wu said that Arkham data showed that BlackRock's two funds (IBIT and ETHA) have a combined assets under management (AUM) of $21.6 billion, slightly higher than the $21.3 billion held by Grayscale's four funds (GBTC, BTC Mini, ETHE and ETH mini). BlackRock's crypto ETF is now the largest in terms of holdings among all providers. Nate Geraci, president of ETF Store, pointed out that BlackRock's IBIT spot Bitcoin ETF has only seen net outflows in one day since its launch.