Listed Bitcoin (BTC) Miners Cut 75 EH/s of Hash Rate, a $1.5B Rig Withdrawal

A 75 EH/s Withdrawal

Listed Bitcoin (BTC) miners cut 75 exahashes per second of realized hash rate across the first half of 2026, a withdrawal that converts to roughly $1.5 billion in Bitcoin mining hardware at an assumed $20 per terahash. That dollar figure prices equipment, not outcomes: it is neither a booked loss nor the proceeds of a sale, and the conversion carries no claim that the rigs actually changed hands. The territory is the realized hash rate of public miners alone; the wider network is outside the count. Buildings, power and cooling installations and fit-out costs sit outside the conversion as well, so the capital actually committed runs above the headline figure. An exahash is a quintillion hash calculations per second, which makes 75 EH/s a meaningful slice of the Bitcoin mining fleet under corporate management. Reward economics add pressure: after the latest halving, each hash earns less subsidy, and older rigs clear profitability on thinner margins. The pullback tracks deteriorating mining economics and a sector-wide push into AI and high-performance computing hosting, pressures the current Bitcoin (BTC) price has done little to offset. In a proof-of-work system, an exit of this size thins the competing fleet without touching the block subsidy, so surviving operators inherit a larger share of rewards. Balance-sheet stress shows up outside the write-downs too: Bitdeer sold all 292.3 BTC it mined in its latest reported week and holds none, so production is being monetized immediately rather than preserved as a HODL position. Every company named in this piece is among the 12 listed miners whose disclosures underpin the estimate, which deliberately separates equipment value from accounting charges.

Where the Impairments Landed

Inside those 12 companies, the accounting record splits along two lines that should not be merged. Impairment charges and reductions in the fair value of assets held for sale came to roughly $1.1 billion in the first half, an impairment being the charge booked when an asset's carrying value exceeds what it can recover. The $1.5 billion figure is different in kind: a per-unit conversion of withdrawn hash rate into dollar terms. One aggregates corporate accounting items across several companies; the other prices hardware, so the two totals are not designed to reconcile. IREN's investor disclosure states impairment charges of $638.8 million for its fiscal year 2026, which ended June 30, and the company says a substantial portion relates to Bitcoin (BTC) mining rigs, alongside IT and electrical infrastructure and other assets affected while converting datacenters for its AI cloud business. Core Scientific booked a $266.5 million charge in the first quarter of 2026 covering mining equipment and infrastructure, and names deteriorated mining business economics, not the AI transition, as the main cause. Cipher Mining's Black Pearl facility, which began mining in July 2025, recognized losses of roughly $96.1 million on its mining equipment that year, against about $57.9 million of revenue the same equipment generated in 2025; the company notes that two figures alone cannot settle the facility's full return on investment. TeraWulf shows the pivot's cost from the other side of the ledger: $53 million of HPC lease revenue in the first half of 2026, against roughly $131 million paid in cash interest over the same period, a bill the company says it met with cash and other income. Each item sits in its own column: recoverable value from existing rigs, conversion spending, and financing costs incurred before new capacity starts earning.

What the $1.5B Does Not Say

The load-bearing records here are the company disclosures themselves: IREN's filing fixes fiscal-year impairments at $638.8 million, and Core Scientific's first-quarter charge names mining economics, not the AI build-out, as its main cause. Our analysis treats the $1.5 billion as a scale marker for capital leaving the mining fleet and keeps it apart from the $1.1 billion of booked accounting charges. What remains available sits with the operators that converted first: TeraWulf's $53 million of HPC lease revenue is recurring income, arriving in the same half as a $131 million interest bill. Until lease revenue closes that gap, the equipment conversion and the accounting charges stay separate facts. Traders weighing this supply-side shift against market structure can follow it in our Bitcoin technical analysis.