In the trading week that concluded on October 2, 2026, U.S. spot Bitcoin exchange-traded funds (ETFs) attracted a substantial $241 million in net inflows, marking three consecutive weeks of positive growth.
However, the overall figure masks a significant imbalance within the week. Notably, BlackRock’s iShares Bitcoin Trust (IBIT) alone garnered $450 million, as reported by data primarily sourced from SoSoValue, with supplementary tracking by Farside Investors.
This brings the total for IBIT to an impressive $65.73 billion, solidifying its position as the dominant player in this market segment while significantly exceeding the total net growth for all funds combined this week.
In contrast, ARK 21Shares’ ARKB saw a more moderate increase, securing $25.52 million, raising its cumulative total to $1.4 billion.
On the other hand, Fidelity’s FBTC faced challenges. It recorded the largest outflows of the week, losing $168 million, although it still maintains a solid asset base of $10.9 billion.
A closer look at the numbers reveals a striking trend. Between IBIT and ARKB, the inflows exceeded the week’s overall net total, even after accounting for FBTC’s losses, suggesting that most other funds experienced net outflows.
Total net assets in all spot Bitcoin ETFs reached around $108.89 billion, which represents 6.42% of Bitcoin’s entire market capitalization.
Since the launch of these funds in January 2024, net inflows have now accumulated to about $57.79 billion.
Earlier this year, the sector faced significant redemptions, resulting in a net outflow deficit of approximately $5.8 billion by mid-July. However, a recovery began in August and gained momentum throughout September, with a record inflow of $2.4 billion registered during the week ending September 25, continuing into October.
While $241 million is a decline from that record week, the upward trend is more important than the dollar amount for a market that has recently seen substantial capital exit.
The concentration of inflows in IBIT raises questions about the overall market sentiment. If IBIT continues to capture most fresh capital while other funds experience outflows, it could indicate a more narrow appetite for investment than the headline figures suggest.
With 6.42% of BTC’s market cap held in ETFs, the volume of buying or selling through these investment vehicles has the potential to significantly impact market supply and demand dynamics. Consistent inflows could bolster prices, while a return to hefty outflows could reverse this trend, as evidenced in the first half of the year.
In summary, the current data presents a straightforward narrative. Following a challenging beginning to 2026, investment is returning to spot Bitcoin ETFs, cumulative inflows have rebounded to roughly $57.79 billion, and BlackRock continues to be the primary recipient of this resurgence.