The crypto ETF market has entered September 2026 with strong institutional demand, although the picture is not the same across every digital asset. Bitcoin remains far ahead of other crypto assets by ETF size, while Ethereum has built a large second tier. Solana also has a notable ETF market, but recent flows show less strength.
The latest available data gives investors a useful view of the largest funds, their assets, fees and recent money flows. As of September 4, U.S. spot Bitcoin ETFs had about $99.394 billion in assets under management, while Ethereum ETFs had about $15.46 billion. Solana ETFs had about $1.189 billion.
The list below focuses on the 10 largest major U.S. spot crypto ETFs by assets from the latest available data. The ranking uses the September 4 AUM figures because that is the latest full ETF dataset available for the comparison.
Bitcoin Still Leads the Crypto ETF Market
Bitcoin remains the clear leader in the U.S. crypto ETF market. Its funds have attracted billions of dollars from investors who want exposure to BTC through a normal brokerage account.
The total Bitcoin ETF market reached about $99.394 billion in AUM on September 4. Daily net flow for the Bitcoin group was $174.6 million that day. Ethereum had $25.9 million of daily inflow, while Solana had a $5.2 million outflow.
The latest weekly data also show strong demand. U.S. spot Bitcoin ETFs received about $986.9 million during the week ended September 4. That was the third straight week of net inflows and brought the three-week total to about $3.82 billion.
This backdrop makes large Bitcoin funds the main choices for investors who want crypto exposure through an ETF.
1. iShares Bitcoin Trust — IBIT
BlackRock’s IBIT remains the biggest crypto ETF by a wide margin. Its AUM stood at about $61.435 billion on September 4, according to the latest ETF data. Its daily volume was about $2.362 billion, which also shows the depth of its market.
Blockworks’ September 8 tracker showed IBIT at about $60.55 billion in ETF AUM, with a 0.25% fee and about $2.35 billion in 24-hour volume. Small differences between sources can occur because of different calculation times.
IBIT has also been the strongest fund for recent Bitcoin flows. About $691.5 million went into IBIT during the week ended September 4. That represented roughly 70% of the total Bitcoin ETF inflow for that period.
2. Fidelity Wise Origin Bitcoin Fund — FBTC
Fidelity’s FBTC is the second-largest Bitcoin ETF on the latest list. It had about $13.866 billion in AUM on September 4.
The fund recorded about $57.2 million in daily inflow on that date. Its trading volume was about $242.76 million.
Blockworks listed the fund at about $13.54 billion in AUM on September 8 and showed a 0.25% fee.
FBTC gives investors a major alternative to BlackRock’s product. Its large asset base and strong trading activity make it one of the key funds in the Bitcoin ETF market.
3. Grayscale Bitcoin Trust — GBTC
Grayscale’s GBTC held about $10.294 billion in AUM on September 4. Its daily trading volume stood at about $134.91 million.
GBTC has a long history in the crypto investment market. It was one of the best-known ways for investors to gain Bitcoin exposure before the arrival of the U.S. spot Bitcoin ETF market.
Its main drawback is cost. Blockworks lists a 1.50% fee, far above the 0.25% rate shown for IBIT and FBTC.
For a long-term investor, this difference deserves close attention because fund costs can have a major effect over many years.
4. iShares Ethereum Trust — ETHA
BlackRock’s ETHA is the largest Ethereum ETF in the latest data. It had about $8.626 billion in AUM on September 4.
The fund also received about $57.8 million in daily inflows, while its trading volume reached roughly $611.68 million.
Ethereum ETFs have shown strong demand in recent weeks. U.S. spot Ether ETFs brought in about $218 million during the week ended September 4, which marked their third straight positive week.
ETHA therefore stands out as the main large-scale choice for investors who want Ethereum rather than Bitcoin.
5. Grayscale Bitcoin Mini Trust — BTC
The Grayscale Bitcoin Mini Trust, with the ticker BTC, had about $4.873 billion in AUM on September 4. Its daily trading volume was about $39.68 million.
This fund is much smaller than GBTC, but its cost structure is more attractive. Blockworks lists its fee at 0.15%.
That lower cost can make the Mini Trust worth a closer look for investors who want Bitcoin exposure but do not want to pay the higher GBTC fee.
6. Bitwise Bitcoin ETF — BITB
Bitwise’s BITB had approximately $2.976 billion in AUM on September 4. Its daily trading volume was about $52.65 million.
BITB has become one of the more established alternatives to the largest Bitcoin funds.
Bitwise has a long focus on digital-asset products, so the fund may appeal to investors who prefer an asset manager with a strong crypto background.
7. ARK 21Shares Bitcoin ETF — ARKB
The ARKB fund had about $2.684 billion in AUM on September 4. Its daily volume was about $63.09 million.
The fund combines the ARK Invest and 21Shares brands and gives investors another major route to Bitcoin exposure.
ARKB also received strong attention during the latest period of institutional demand. Along with IBIT, it accounted for a large share of recent Bitcoin ETF purchases.
For investors who compare several Bitcoin ETFs rather than choose only by size, ARKB remains an important fund to examine.
8. Grayscale Ethereum Mini Trust — ETH
The Grayscale Ethereum Mini Trust, ticker ETH, had about $2.208 billion in AUM on September 4. Its daily trading volume stood near $87.86 million.
The product gives investors another route to Ethereum exposure through the ETF market.
Its position is much smaller than ETHA, but its asset base remains large enough to place it among the biggest Ethereum funds in the U.S.
9. Grayscale Ethereum Trust — ETHE
Grayscale’s ETHE had approximately $1.89 billion in AUM on September 4, with about $41.56 million in daily trading volume.
ETHE has an important place in the history of Ethereum investment products. However, cost is a major issue for investors who compare it with newer products.
The fund’s fee is listed at 2.50%, which is considerably higher than many newer Ethereum products.
That does not automatically make ETHE unsuitable, but the cost gap is important for anyone who plans to hold the fund for a long period.
10. Fidelity Ethereum Fund — FETH
Fidelity’s FETH had about $1.354 billion in AUM on September 4. Its daily trading volume was close to $29.79 million.
The fund also recorded a $48.3 million outflow on September 4. That was a notable move compared with the broader positive trend across Ethereum ETFs.
Even with that outflow, FETH remains one of the largest Ethereum ETFs and gives investors another established choice from a major financial company.
Solana ETFs Deserve Attention
Solana has a much smaller ETF market than Bitcoin and Ethereum, but it is worth watching.
The Solana ETF group had about $1.189 billion in AUM on September 4. However, it recorded a $5.2 million daily outflow. Bitwise’s BSOL accounted for about $982.82 million of that AUM and had a $2.8 million outflow on the same day.
Recent reports also show that Solana ETF inflows fell sharply during the latest week. The weekly inflow dropped to about $6.2 million, down 96% from the prior week’s level.
That makes Solana a more speculative part of the crypto ETF market than Bitcoin or Ethereum at present.
September Macro Risks Matter
Crypto ETFs do not exist in isolation. Their performance remains closely tied to the wider financial market.
Bitcoin was around $78,298 on September 8, after it had reached about $82,164 the previous week. Investors are focused on the Federal Reserve’s September 16 decision, while markets have placed a high probability on a rate increase.
Oil prices and Middle East tensions have also added pressure to broader markets. Higher oil prices can raise inflation concerns and make the Federal Reserve’s policy decision more difficult.
This means September could remain volatile for crypto ETFs even if institutional demand stays strong.
The Best Funds Depend on the Goal
For pure Bitcoin exposure, IBIT stands out because of its enormous AUM, strong liquidity and recent flow strength. FBTC is another major choice, while BTC, BITB and ARKB give investors additional products to compare.
For Ethereum exposure, ETHA is the clear leader by assets. ETH, ETHE and FETH are other large choices, although their fees, flows and fund structures differ.
The latest figures show that institutional demand has returned to Bitcoin in a meaningful way. Nearly $987 million entered U.S. spot Bitcoin ETFs during the week ended September 4, while the three-week total reached about $3.82 billion.
At the same time, the market is not risk-free. Crypto prices can move sharply, ETF flows can reverse, and macroeconomic news can change investor sentiment very quickly.
For September 2026, IBIT, FBTC, ETHA, BTC, BITB, ARKB, ETH, ETHE, FETH and HODL form a useful large-fund watchlist. The strongest starting point for research is not simply the fund with the biggest AUM. Investors should also compare fees, liquidity, recent flows and the asset behind each ETF before making a decision.
Also Read – 10 Crypto Investment Red Flags You Should Never Ignore
