Major Investment Giant, BlackRock, Now Owns $100 Billion Worth of Cryptocurrency with Bitcoin and Ethereum Taking the Lead in Its Portfolio
BlackRock, the world's largest asset manager, has seen a significant expansion in its cryptocurrency portfolio since early 2024. The portfolio, which primarily consists of Bitcoin and Ethereum, has shown notable growth in both assets and market value.
Bitcoin Holdings
At the start of 2025, BlackRock held approximately 552,000 Bitcoin. By June 10, 2025, this number had increased to around 662,600 Bitcoin, representing around 3.3% of the circulating Bitcoin supply. Over the first eight months of 2025, BlackRock's Bitcoin holdings grew by roughly 34%.
The BlackRock iShares Bitcoin Trust (IBIT), launched on January 11, 2024, rapidly accumulated Bitcoin and became a dominant institutional holding. By August 2025, IBIT commanded about 78% market share with $91.06 billion Assets Under Management (AUM).
The rise of BlackRock’s BTC holdings and the ETF’s institutional infrastructure (custody, liquidity) helped reduce Bitcoin volatility, positioning it closer to traditional tech stocks in risk profile. This, in turn, fostered wider corporate and institutional adoption, with over 70 corporations allocating 1-2% of their assets to Bitcoin.
Ethereum Holdings
Starting 2025, BlackRock held about 1.1 million Ethereum. Ethereum exposure expanded even faster than Bitcoin, with ETH holdings increasing by 190% in volume and 309% in dollar terms by August 2025. Though Bitcoin accounts for over 85% of BlackRock’s crypto portfolio, Ethereum is the fastest-growing crypto holding in terms of both volume and market value.
Other Cryptocurrencies
Reports primarily focus on Bitcoin and Ethereum, with no detailed data indicating significant holdings of other cryptocurrencies within BlackRock’s portfolio as of mid-2025.
Portfolio Valuation and Trends
At the beginning of 2025, BlackRock’s crypto portfolio was valued around $54 billion. It experienced a dip to about $46 billion in early April 2025, followed by a surge to more than 124% growth from April 7 to August 2025, driven by rising Bitcoin and Ethereum prices and accumulations.
The Bitcoin ETF vehicles, chiefly BlackRock’s IBIT, have transformed Bitcoin from a speculative asset to an institutional inflation hedge accessible to pension funds and corporations via regulated, custody-secured ETFs.
Since early 2024 and notably through 2025, BlackRock has aggressively grown its Bitcoin and Ethereum holdings via spot ETFs. This evolution reflects institutionalization trends, liquidity improvements, and regulatory embrace, underpinning BlackRock's leading role in crypto asset management. Other cryptocurrencies remain a minor or negligible part of its portfolio based on available data.
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