Solana ETFs Post Best Month Since Launch as Bitcoin and Ethereum Funds Bleed

US spot Solana ETFs drew $115.34 million in net inflows during May 2026, the strongest monthly haul since the category launched in late October 2025, according to Crypto Briefing. The result stands in sharp contrast to Bitcoin and Ethereum spot funds, which bled hundreds of millions over the same period.

Bitwise BSOL Dominates the Category

Bitwise's BSOL contributed roughly $80 million of May's total inflows, extending its lead across the field. Since launching as the first US spot Solana ETF on October 28, 2025, BSOL has captured 81% of cumulative category flows, or roughly $916 million of the $1.13 billion drawn by all US Solana products since inception, per Crypto Briefing.

The fund's structural edge is its staking component. BSOL stakes 100% of its held SOL and targets roughly 7% in average annual staking rewards, a feature Bitcoin ETFs cannot structurally offer. Bitwise is also waiving its 0.20% management fee on the first $1 billion in assets, a threshold the fund is now approaching, per its SEC filing.

Fidelity's FSOL recorded the month's largest single-day inflow. On May 29, the fund took in $25.19 million, roughly 19.6% of its $128.84 million in assets under management, per TipRanks. The flow came a week after Fidelity's fee waiver expired on May 18, when FSOL's expense ratio moved to 25 basis points plus a 15% staking fee.

May recorded zero net outflow days across all US Solana ETF products, and a peak single-day inflow of $20.77 million on May 6.

Bitcoin ETFs Post Their Worst Outflow Stretch in Years

While Solana funds were absorbing capital, Bitcoin ETFs endured a record nine consecutive trading days of net outflows through the end of May, the longest withdrawal streak since the products launched in January 2024, CoinDesk reported. Over those nine sessions, investors pulled approximately $2.8 billion. Monthly Bitcoin ETF withdrawals reached roughly $2.3 billion. BlackRock's iShares Bitcoin Trust recorded its largest single-day outflow since launch during the streak, driven by a $1.29 billion dark pool transaction, per the same report. Bitcoin's price slid from roughly $80,000 to $73,000 over the outflow period.

The divergence had been building throughout May. In the week ending May 15, CoinDesk reported that Bitcoin ETFs shed $982 million while Solana products drew $55.1 million. James Butterfill, Head of Research at CoinShares, described the split as selective rather than defensive: "Altcoins held up notably well. Investors are looking past Bitcoin and Ethereum for selective exposure."

Ethereum funds lost $249 million in the same week.

$1.13 Billion in Seven Months: What the Cumulative Record Shows

Cumulative net inflows to all US Solana spot ETFs since October 2025 have reached $1.13 billion, per Crypto Briefing. The pace is notable given the headwinds the category launched into: when BSOL debuted, Bitcoin ETFs were simultaneously shedding more than $2 billion in assets and Ethereum funds were down $579 million, according to Decrypt. Bitwise CEO Hunter Horsley noted at the time: "Inflows every day for the last 8 days since its launch. Over $500,000,000 in total. It's clear investors want Solana exposure."

Seven months later, that early momentum has held. Solana ETFs remain modest in absolute scale against Bitcoin's ETF complex, which holds assets in the tens of billions, but the flow direction through May points to Solana being treated as a standalone allocation rather than a satellite position that mirrors Bitcoin sentiment.

Products competing alongside BSOL (Grayscale's SOLZ, VanEck's VSOL, Fidelity's FSOL, and 21Shares' SOL fund) collectively account for the remaining 19% of cumulative category flows. SOLZ logged a single-day outflow of $1.18 million on May 28, a modest redemption against its $96.15 million in AUM. The intra-category dispersion matters: BSOL's dominance is not a rising-tide story where all Solana products benefit equally.

Heading into Q3, the open question is how BSOL's flow share responds once its fee waiver expires after the fund crosses the $1 billion AUM threshold. Whether the staking-yield advantage and first-mover positioning prove durable against a field of competing products with their own fee structures is something the next few months will answer.