Key Takeaways
- U.S. spot Bitcoin ETF commands $110.68 billion in total net assets, representing 5.91% of Bitcoin’s market cap.
- BlackRock’s BTC ETF holds $58.68 billion in Bitcoin.
- U.S. spot Ethereum ETFs hold $6.31 billion in ETH, or 2.89% of ETH’s market cap.
U.S. spot Bitcoin (BTC) exchange-traded funds (ETFs) have seen mixed results as a majority of funds post outflows, and BlackRock’s fund draws in half a billion.
Meanwhile, all nine Ethereum ETFs posted zero flows either way, marking a rare day of neutrality amid ETH’s ongoing underperformance.
Bitcoin ETFs
According to data from SoSoValue, Bitcoin ETFs have had a strong start to the week and garnered $425.45 million in daily total net inflows on May 5, 2025.
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The last week of April/first week of May wrapped with $1.81 billion in total inflows, and the week prior, funds garnered a gigantic $3.06 billion.
Leading the charge, and the sole gainer, BlackRock’s iShares Bitcoin Trust (IBIT) raked in $531.18 million daily net inflows, raising its cumulative net inflows to a whopping $44.21 billion.
BlackRock’s BTC ETF is also the number one ETF in terms of net assets, commanding $58.68 billion in BTC.
The second-largest BTC ETF, Fidelity Wise Origin Bitcoin Fund (FBTC), posted outflows of $57.82 million, bringing its cumulative net inflows to $11.6 billion and net assets to $18.74 billion.
It’s followed by the Bitwise Bitcoin ETF (BITB), which tallied modest outflows of $22.66 million. The fund has recorded $2.04 billion in cumulative net inflows and commands $3.64 billion in net assets, ranking it fourth and fifth, respectively.
The worst-performing fund, Grayscale’s Bitcoin Trust (GBTC), saw a further $16.37 million in exits from its diminishing fund. To date, GBTC has tallied $22.76 billion in cumulative net outflows, diminishing its net assets to $17.94 billion.
ARK 21Shares’ Bitcoin ETF (ARKB) also posted exits to the tune of $6.14 million. Its cumulative net inflows stand at $2.64 billion, with $4.53 billion in net assets, ranking it third and fourth, respectively.
Finally, Franklin Templeton’s (EZBC) posted minor outflows of $2.74 million, bringing its cumulative net inflows to $259.73 million and net assets to $490.52 million, ranking it eighth and tenth, respectively.
IBIT Dominance
Upon launching, BlackRock’s IBIT fund drew hundreds of millions in net inflows every day all the way through to the end of April 2024.
Since then, it has seen consistently high inflows and low outflow rates, allowing it to dominate and rack up a $58.58 billion portfolio.
In 2025, BlackRock saw its largest rate of outflows, which came as part of a broader market shakeout when BTC tumbled below $90,000. Its largest-ever day of outflows came on Feb. 26, 2025, when investors fled following BTC’s dip below $85,000.
But IBIT investors were resilient, and the fund continued outperforming the competition, maintaining a $40 billion gap between itself and its nearest competitor, FBTC.
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