NYDIG Analyzes $1.26B Off-Exchange IBIT Block as Urgent Exit by Single Holder

A dramatic off-exchange block trade in BlackRock’s spot Bitcoin ETF, IBIT, on May 26 looks less like a technical unwind and more like a single large holder sprinting for the exit, according to NYDIG’s May 29 weekly Bitcoin digest. What happened - At 10:30:34 ET on May 26 a single counterparty sold 29.21 million IBIT shares through FINRA/Nasdaq TRF Carteret — a block worth roughly $1.26 billion. - The shares went for $43.16 each, $1.01 below the prevailing market price of $44.17 — a 2.3% concession equal to about $29.5 million the seller effectively paid for speed and certainty of execution. Why NYDIG thinks this was a fast exit, not a basis unwind - Size: The block exceeded the reported positions of every disclosed March 31, 2026, 13F holder — an unusually large, concentrated trade. - Price concession and trade mechanics: The trade was executed off-exchange, carried a Rule 611 trade-through exemption and was designated as an Intermarket Sweep Order. Those flags point to a privately negotiated block prioritizing execution certainty over price improvement. - Tape and timing: Minutes before the sale there was a burst of activity (IBIT ran from about $43.81 to an intraday high of $44.24 between 10:16–10:28). Two one-minute intervals (10:26–10:27 and 10:27–10:28) printed roughly 822k and 702k shares — three-to-four times normal activity — and a small 20,000-share print seconds before the block printed at $44.17, showing the $43.16 level was specific to the block. - Lack of futures activity: A 29.21 million-share IBIT position implies roughly 18,500 BTC of exposure (about 3,700 CME Bitcoin futures contracts). If the seller were simultaneously unwinding a delta-neutral basis position, futures volume should have spiked. Instead, total CME futures activity in the relevant minutes was tiny — the 10:30–10:31 interval saw only 91 contracts, and 10:30–11:00 accounted for only about 1,070 contracts. NYDIG notes a contemporaneous basis unwind of this size would have been visible and would have represented roughly 43% of daily CME volume. Market backdrop and technical context - The ETF category was already under pressure: spot Bitcoin ETFs entered May 26 following six straight sessions of net outflows that began May 15. Across that stretch the category shed about $1.55 billion, with IBIT contributing roughly $1.1 billion of those outflows. - Bitcoin’s price action had deteriorated after failing to break above its descending 200-day moving average in early May (around $82,000–$82,500). By mid-May BTC pulled below the trendline and the 14-day RSI slid from near 70 into the mid-30s — a technical backdrop that likely contributed to ETF outflows leading into the block trade. Other caveats and market signals - NYDIG warns not to equate IBIT’s reported $720 million of net redemptions over May 26–27 directly with the block trade: ETF creation/redemption reporting can mask simultaneous gross flows, and IBIT’s reported NAVs of $42.955 (May 26) and $42.431 (May 27) were both below the $43.16 block price. - The seller remains unidentified. Public data can’t determine whether the liquidation was forced by redemptions or risk limits, or whether it was a discretionary decision — only that one sophisticated holder was willing to accept a nearly $30 million haircut for speed. Bottom line NYDIG’s analysis points to an urgent, concentrated liquidation of a large IBIT position rather than a coordinated basis-trade unwind. The trade highlights how single large holders can move ETF markets and how off-exchange mechanics and futures activity (or the lack of it) can reveal intent behind massive blocks. At press time BTC was trading near $72,891.