BlackRock continues to assert dominance over the cryptocurrency ETF landscape, with fresh data showing the asset manager deployed well over $1 billion into Bitcoin and Ethereum on October 6, 2025.
According to Lookonchain ETF flow data reviewed by Finbold, BlackRock added 6,447 BTC ($805 million) in a single day through its iShares Bitcoin Trust (IBIT), lifting total Bitcoin holdings to 783,768 BTC worth around $97.9 billion.
On the Ethereum side, the iShares Ethereum Trust (ETHA) recorded inflows of 45,672 ETH ($212.9 million), bringing total Ethereum holdings to 3,933,864 ETH, valued at over $18.3 billion. Combined, BlackRock’s single-day accumulation topped $1 billion, reinforcing its increasingly aggressive stance in digital assets.
BlackRock outpaces competitors
Across all Bitcoin ETFs, the total daily net inflow on October 6 was 7,553 BTC ($943.3 million). Of this, BlackRock’s IBIT accounted for 85% of flows. Its nearest rival, Fidelity’s FBTC, saw just 567 BTC enter on the same day, while ARK’s ARKB added 289 BTC.
Ethereum ETFs told a similar story. The group as a whole absorbed 51,653 ETH ($240.8 million) in daily inflows, but BlackRock captured nearly 88% of the total. Fidelity’s FETH ranked a distant second with 1,248 ETH, followed by Grayscale’s ETHE with 832 ETH.
Weekly flows confirm leadership
Zooming out to the past seven days, Bitcoin ETFs collectively added 26,526 BTC ($3.31 billion). BlackRock’s IBIT alone brought in 15,097 BTC (≈ $1.89 billion), representing more than half of the entire market’s inflows.
Ethereum ETFs posted a weekly net inflow of 298,921 ETH ($1.39 billion), with BlackRock’s ETHA contributing 158,794 ETH ($739 million), again over 50% of the total.
BlackRock’s growing crypto war chest
Since July 1, BlackRock’s total crypto portfolio has swelled by $22.46 billion, rising from $79.63 billion to $102.09 billion, according to Finbold’s Q3 2025 Cryptocurrency Market Report.
Its Bitcoin allocation grew by $10.99 billion(+14.6%), while Ethereum holdings exploded by $11.46 billion (+262%).
