BlackRock, Fidelity Inject $297.6M into U.S. Spot Bitcoin ETFs

On Aug. 18, 2026, U.S. spot Bitcoin exchange-traded funds recorded $297.56 million in net inflows, reversing three consecutive sessions of net outflows. BlackRock’s IBIT received $160.23 million and Fidelity’s FBTC took in $111.90 million. ARK 21Shares’ ARKB added $14.18 million and Morgan Stanley’s MSBT reported $11.24 million. Trading value across the Bitcoin ETFs for the session reached $2.12 billion and combined net assets closed at $77.41 billion.

Institutional holdings accompanied the inflows. Quantitative trading firm Jane Street disclosed more than $1 billion in U.S. spot Bitcoin ETF holdings as of June 30, including roughly $828 million in IBIT and smaller positions in other products. Harvard Management Company maintained an IBIT position of 3,044,612 shares valued at $101.4 million as of June 30, unchanged from the prior quarter after two earlier reductions.

Ether exchange-traded products also posted inflows of $30.85 million. BlackRock’s ETHA accounted for $25.90 million, Fidelity’s FETH added $4.27 million and Bitwise’s ETHW received about $682,000. No Ether ETF reported a net outflow during the session. Combined trading value across Ether ETFs was $459.73 million and their combined net assets closed at $10.59 billion.

Smaller altcoin-focused ETFs were largely inactive. Solana, XRP and HYPE funds reported no net creations or redemptions for the session, leaving most allocation activity concentrated in Bitcoin and Ether products.