Spot Bitcoin ETFs Pull In Nearly $1 Billion on Monday
BlackRock’s IBIT, Ark’s ARKB, and Fidelity’s FBTC brought in the most capital. The inflows followed Bitcoin’s rise to its highest level since January.
Key Takeaways
- U.S. spot Bitcoin ETFs pulled in a net $998.95 million on Monday, the biggest inflow since October 6, 2025.
- BlackRock's IBIT led with $381.37 million, followed by Ark's ARKB with $289.12 million and Fidelity's FBTC with $238.84 million.
- Assets under management across all U.S. spot Bitcoin ETFs stood at $103 billion on September 18, with $55.1 billion in net inflows since launch.
Spot Bitcoin ETFs in the United States pulled in nearly $1 billion (€0.9 billion) in fresh money on Monday, while Bitcoin kept climbing to its highest level since January. The net inflow of $998.95 million (€869 million) was the biggest since October 6, 2025, and the ninth-largest since the funds started trading on January 11, 2024.
BlackRock Leads the Inflows
The inflows were led by BlackRock's IBIT, which brought in $381.37 million (€332 million). It was followed by Ark's ARKB with $289.12 million (€252 million) and Fidelity's FBTC with $238.84 million (€208 million). Together, those three funds show that demand was broad enough not to rely on just one provider.
The strong day fits into a stretch of more interest in the products. For the week through September 5, 2026, there had already been $3.8 billion (€3.3 billion) in inflows over three weeks, the strongest period of 2026 up to that point. The overall market has also grown a lot by now: on September 18, assets under management across all U.S. spot Bitcoin ETFs stood at $103 billion (€89.6 billion), with $55.1 billion (€48 billion) in net inflows since launch.
More Confidence After Headwinds
Monday's inflow was the first three-day winning streak in two weeks. It came shortly after Bitcoin took a hit from a failed cloture vote in the Senate on the Clarity Act and a rate hike by the Fed. The numbers suggest that institutional investors have not, for now, let those shocks spill over into their demand for Bitcoin.
IBIT remains the biggest player here. According to the latest figures, the fund holds about 773,000 BTC and had $62.7 billion (€54.6 billion) in assets under management on September 18. That highlights how strong the spot Bitcoin ETF market has become since launch in early 2024.
Earlier, the failed CLARITY vote had already triggered a heavy outflow from Bitcoin and Ethereum ETFs. The move back to nearly $1 billion (€0.9 billion) in inflows shows how quickly sentiment in this market can turn.
What This Means for Investors
For European crypto followers, this is especially relevant because U.S. spot Bitcoin ETFs have become an important gauge of institutional demand. When funds like these pull in billions again in a short time, it says something about Bitcoin's role as an investment asset in broader portfolios. It also shows that the Bitcoin market is not only driven by spot trading on crypto exchanges, but increasingly by regulated funds.
