A $1.29 billion block trade involving BlackRock's iShares Bitcoin Trust (IBIT) was executed in a dark pool on Tuesday, May 26, 2026. The transaction, which occurred around 10:30 a. m. ET at a price of $43.16 per share, involved roughly 29 million shares. Dark pools are private exchanges that allow institutional investors to conduct large trades discreetly, away from the public market. This helps to minimize potential price disruption that could occur with such a large order on a public exchange.
The massive trade immediately caught the attention of crypto analysts. Galaxy Research's Alex Thorn noted it was the largest IBIT block trade he had ever seen. Bloomberg ETF analysts Eric Balchunas and James Seyffart confirmed the transaction as an intermarket sweep order. While the identity of the seller remains unknown, such a large trade could signify portfolio rebalancing, hedging, or even liquidation.
Interestingly, despite the size of the trade, IBIT closed slightly higher at $42.99 on the day, and Bitcoin's price remained relatively stable around $75,900. However, some analysts suggest the trade may have contributed to a subsequent dip in Bitcoin's price. The U. S. spot Bitcoin ETFs have experienced net outflows for eight consecutive trading days, with over $2 billion exiting the funds since May 14. IBIT itself saw a net outflow of approximately $192 million on Tuesday.
The long-term impact of this dark pool trade remains to be seen. It could represent a significant shift in institutional sentiment towards Bitcoin or simply a one-off portfolio adjustment. Market observers will be closely watching ETF flow data to determine the full implications of this substantial transaction.
