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Last updated: September 2026. Editorial Team — researched using data from SoSoValue, CryptoBriefing, and reporting from 24/7 Wall St. and Solana Compass. See “Sources & Methodology” for our full source list.
Quick Answer
While Bitcoin and Ethereum ETFs still hold the largest total assets, they’ve both seen cumulative inflows decline over the past seven months of 2026, while Solana and XRP ETFs have grown steadily over the same period. Solana ETFs specifically posted their strongest week of 2026 the week ending August 31, pulling in $153 million in net inflows, before that pace collapsed 96% to just $6.18 million the following week — a whiplash pattern that illustrates just how young and sentiment-driven the Solana ETF category still is, even as its underlying assets under management have grown to $1.4-1.5 billion since an October 2025 launch.
The Growth Leaderboard
24/7 Wall St.’s August 2026 analysis lays out the comparative picture precisely: Solana ETFs lead 2026 crypto ETF growth at 33%, while Bitcoin ETFs have shed 5.5% of cumulative inflows amid outflows topping $7 billion. XRP ETFs grew 28% to $1.51 billion over the same measurement period. Despite Bitcoin’s rough year on this specific metric, it’s important to keep the scale in context: Bitcoin ETFs hold nearly $52 billion in cumulative net inflows, more than Ethereum, XRP, and Solana funds combined, with total net assets around $77 billion — meaning the funds now hold about 6% of all Bitcoin in circulation. Bitcoin’s rough year came specifically from January, when the funds posted $1.61 billion in monthly outflows driven by BTC’s falling price, higher volatility, and hawkish Fed rate expectations that made holding a non-yielding asset costlier for leveraged traders.
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Solana’s Record Week
Solana Compass’s tracking documents the specific mechanics of Solana ETFs’ best week of 2026. August 27 produced the week’s single-day peak, $60.91 million in net inflows, the third-highest daily result since the funds’ October 2025 launch, per CryptoBriefing. Combined trading volume for all nine Solana ETF products hit $196.82 million that day. Bitwise’s BSOL staking fund captured $40.2 million of that day’s total — roughly two-thirds — as it crossed $1 billion in assets under management for the first time, with Goldman Sachs disclosed as its largest known institutional holder. By the morning of August 31, SolanaFloor’s ETF tracker confirmed the record explicitly: “U.S. spot Solana ETFs recorded their strongest week of 2026, with over $153 million in net inflows, a new yearly high.”
Bitwise’s BSOL specifically has become the dominant vehicle in the Solana ETF category: it holds approximately 9.3 million SOL and has accumulated between $1.01 billion and $1.03 billion in cumulative net inflows since launch — representing 77 to 80 percent of all capital ever deployed into the nine US spot Solana ETF products, according to CryptoBriefing’s data.
Then the Reversal
The momentum didn’t hold. Yahoo Finance and 24/7 Wall St. both reported the same striking figure: net inflows into Solana ETFs fell 96%, from $153.87 million in the week ending August 28 to just $6.18 million in the week ending September 4, 2026. The funds still recorded a net inflow for the week overall, despite a $5.21 million outflow on September 4 alone that erased much of the earlier week’s gains. Total net assets held roughly steady at $1.41 billion on September 4, down only slightly from $1.43 billion the previous week — a reminder that even a dramatic weekly inflow collapse doesn’t necessarily translate into comparably large asset outflows, since existing holdings don’t disappear just because new money slows.
Solana ETFs’ weekly trading volume told a parallel story, falling from $699.39 million to $350.27 million as inflows collapsed — investors weren’t just contributing less new money, they were trading the funds less actively overall. Ethereum followed a similar pattern, with its own ETF trading volume falling from $6.32 billion to $4.08 billion as its inflows weakened over the same period.
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The On-Chain Catalyst Behind the August Surge
The August wave of Solana ETF activity wasn’t happening in isolation. Solana Compass’s reporting notes it arrived alongside a broader wave of institutional Solana activity: Charles Schwab announced spot SOL trading for its Schwab Crypto platform, reaching roughly 39 million customers. Solana’s Alpenglow upgrade, rolling out August through October according to 24/7 Wall St., aims to slash network finality time from 12.8 seconds to 150 milliseconds — a genuinely significant technical improvement that analysts view as a key demand catalyst, though 24/7 Wall St. is careful to note vote closing on the proposal isn’t the same as shipping, and implementation timelines on Solana proposals have slipped before.
What Would Confirm a Genuine Trend Shift
24/7 Wall St.’s analysis outlines specific, concrete signals worth watching before concluding Solana has genuinely displaced Bitcoin or Ethereum as the market’s preferred crypto ETF exposure: weekly net inflows returning to levels comparable to the $115.34 million recorded in May 2026, with at least three separate products contributing rather than one large inflow concentrated in a single issuer, and Solana’s price holding above key technical levels. Broad participation across multiple funds, rather than concentration in BSOL alone, would represent a more convincing signal than a single strong week driven by one dominant product.
Frequently Asked Questions
Which crypto ETF has grown the most in 2026?
Solana ETFs lead 2026 growth at 33% year-to-date, followed by XRP ETFs at 28%, while Bitcoin ETFs have shed roughly 5.5% of cumulative inflows over the same period, according to 24/7 Wall St.’s analysis.
Why did Solana ETF inflows collapse in September 2026?
Weekly net inflows fell 96%, from $153.87 million to $6.18 million, following the category’s strongest week of 2026, though the funds still recorded a net inflow overall and total assets remained roughly stable near $1.4 billion.
How big are Bitcoin ETFs compared to Solana and XRP ETFs?
Bitcoin ETFs hold nearly $52 billion in cumulative net inflows, more than Ethereum, XRP, and Solana ETFs combined, despite Bitcoin’s weaker relative growth rate in 2026.
What is driving Solana’s ETF momentum?
Institutional access expansion (including Charles Schwab’s spot SOL trading launch) and Solana’s Alpenglow network upgrade, which aims to cut transaction finality time from 12.8 seconds to 150 milliseconds, are cited as key catalysts.
Sources & Methodology
This article draws on data and reporting from: SoSoValue’s crypto ETF flow tracking data; 24/7 Wall St.’s August and September 2026 analyses comparing Bitcoin, Ethereum, XRP, and Solana ETF growth; Solana Compass’s and CryptoBriefing’s tracking of the August 2026 record Solana ETF week; SolanaFloor’s ETF tracker; KuCoin’s Solana ETF coverage; and Yahoo Finance’s September 8, 2026 reporting on the Solana ETF inflow collapse. Figures reflect the most recently published data as of this article’s last-updated date and change daily.
This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency markets are highly volatile.
