According to Trader T statistics, three sets of data are used to summarize the institutional holders of spot bitcoin ETFs in the second quarter. 1. BlackRock's IBIT: 582 institutional holders, up 34% from Quarter 1 (up QoQ); 118 million, excluding options, up 47% QoQ. 2. Fidelity's FBTC: 303 institutional holders, up 25% QoQ; 50.40 million, excluding options, up 35% QoQ. 3. Bitwise's BITB: 139 institutional holders, up 35% QoQ; 14.70 million, excluding options, up 50% QoQ.