Increasing institutional interest and investment in spot Bitcoin ETFs

As of mid-August 2025:

BlackRock's IBIT spot Bitcoin ETF holds over 700,000 BTC, representing approximately 4% of the total Bitcoin supply.
The Blackrock spot Bitcoin fund manages over $91 billion in assets.

Fidelity's FBTC spot Bitcoin ETF holds over 200,000 BTC, representing approximately 2% of the total Bitcoin supply.
The Fidelity spot Bitcoin ETF manages over $24 billion in Bitcoin assets.

In summary, BlackRock's IBIT and Fidelity's FBTC together hold a significant portion of the total Bitcoin supply, highlighting the increasing institutional interest and investment in spot Bitcoin through ETFs.