BlackRock’s iShares Bitcoin Trust Holds 3.3% of Total Bitcoin Supply

BlackRock’s iShares Bitcoin Trust (IBIT) has amassed a substantial holding of approximately 696,874 BTC, valued at around $74 billion as of July 1, 2025. This holding represents roughly 3.3% of the total Bitcoin supply, positioning IBIT as the largest institutional holder among U.S. spot Bitcoin ETFs. This significant reserve highlights BlackRock’s aggressive strategy and strong belief in Bitcoin’s potential as a long-term store of value. It also reflects the growing institutional interest in regulated, exchange-traded exposure to crypto assets.

IBIT continues to lead the spot Bitcoin ETF market, controlling more than half of the U.S. market share and recording over $3.7 billion in new inflows in June 2025 alone. Institutions are drawn to IBIT for its transparency, regulatory compliance, and ease of access to Bitcoin. The ETF benefits from deep market liquidity and real-time tracking of Bitcoin prices, with its assets securely custodied by Coinbase Prime. This provides large investors and portfolio managers with the assurance of crypto exposure without the complexities of managing private keys or wallets.

With nearly 697,000 BTC under management, BlackRock’s holdings represent a significant portion of the circulating Bitcoin supply. When combined with other ETFs, institutional players now hold over 6% of the total supply. This concentration of holdings could intensify the supply squeeze, potentially affecting market dynamics and price movements. As major funds lock up more of the fixed Bitcoin supply, price sensitivity to ETF flows could increase, supporting the overall market stability and growth.

BlackRock’s continued expansion in BTC holdings further legitimizes Bitcoin in the eyes of traditional finance. The rapid growth of IBIT’s assets under management (AUM) to $70 billion outpaces most ETFs in history, underscoring the institutional validation of Bitcoin as a viable investment asset. This trend is likely to continue as more institutions seek regulated and transparent ways to gain exposure to the crypto market.