Institutions Fuel Surge in Bitcoin, Ethereum ETFs in October
- Bitcoin and Ethereum ETFs posted some of their highest October inflow totals in 2025.
- BlackRock’s IBIT and ETHA drove most allocations, outpacing the rival ETF issuers.
- SEC received 31 crypto ETF filings in two months as institutional demand increased.
Bitcoin and Ethereum ETFs have had increased capital flow in early October 2025, according to data from SoSoValue and Coinglass. Spot ETFs tied to both assets recorded one of their strongest weeks since launch as institutional allocations increased across major issuers. The activity followed a volatile period in broader crypto markets, but did not stop asset managers or investors.
Bitcoin ETF Inflows Strengthen
From October 6 to October 10, spot Bitcoin ETFs posted a combined net inflow of $2.71 billion, based on SoSoValue data. BlackRock’s iShares Bitcoin Trust (IBIT) accounted for $2.63 billion of that total, extending its streak as the highest-volume product.
Coinglass reported that total net inflows, as of 13th October, into Bitcoin ETFs now amount to 650,050 BTC, while daily flows at the time of writing showed a minor outflow of 37.02 BTC. The recent inflow trend has broken from the quieter conditions seen in late summer.
Broader Market Appetite Emerges
Compared to August and September, when buying and selling were more evenly balanced, early October flows showed consistent accumulation. Trading volume across Bitcoin ETFs reached $9.78 billion, while total net assets measured $161.19 billion.
This renewed interest comes as the application numbers increase. Over the past two months, 31 crypto ETF filings reached the U.S. Securities and Exchange Commission. Twenty-one of those submissions arrived within the first eight days of October. Bloomberg analyst James Seyffart noted in August that nearly 100 crypto-linked products were still awaiting decisions, indicating how demand for regulated access continues to build.
Ethereum ETF Activity Increases
Ethereum-focused products also saw sizable allocations. Spot Ethereum ETFs had a net weekly inflow of $488 million during the same October 6 to October 10 period, according to SoSoValue. BlackRock’s ETHA led in inflows, reflecting strong investor confidence.
Analysts point to the combined flows in both Bitcoin and Ethereum products as part of a broader allocation shift among institutions. While short-term volatility persists, the regulated nature of ETFs continues to attract investors managing large portfolios.
Related: Bitcoin ETFs Surpass $70B as Institutions Flow In, IBIT Leads
Competitive Sector Changes
BlackRock’s dominance in both Bitcoin and Ethereum products has influenced other issuers. Fidelity’s FBTC holds $24.19 billion in assets and remains the second-largest Bitcoin ETF, while firms including Ark, 21Shares, and Grayscale have adjusted strategies to capture allocations.
The appeal of established issuers has been on liquidity, scale, and management fees. IBIT’s 0.25% fee and market depth continue to rank it among the most actively used vehicles. Consistent inflows into IBIT since launch show how traditional finance participants have adopted ETFs as a preferred route to gain Bitcoin exposure without handling the asset directly.
Large inflows often limit sell pressure during periods of volatility. This dynamic has aligned with price stability in recent weeks as investors positioned around potential policy developments and macroeconomic changes.
The rise in ETF demand has coincided with broader regulatory interest. The growing number of applications before the SEC suggests further product launches may arrive in the coming months. Meanwhile, Bitcoin and Ethereum ETF inflows in early October show one of the most active periods of 2025. If inflows hold, competition among ETF providers may increase as the year moves on.
