According to Odaily, data from Dune indicates that BlackRock's IBIT holds approximately 284,027 Bitcoin (BTC), accounting for about 33.7% of its holdings. In comparison, Grayscale's GBTC holds around 288,084 BTC, which makes up approximately 34.2% of its holdings. The difference between the two is a mere 4,057 BTC.
These figures highlight the significant role that both BlackRock and Grayscale play in the Bitcoin market. With such substantial holdings, these two entities have a considerable influence on the market dynamics of Bitcoin.
It's important to note that these figures are based on the data available at the time of reporting. The actual holdings of these entities may vary due to market fluctuations and trading activities.