Core Scientific plans to exit Bitcoin mining by the end of 2026

Shareholders and bondholders now hold stock in a company that mines almost no Bitcoin: colocation leases to AI customers already supply nearly all its revenue. Selling off its Bitcoin treasury this year to fund construction means the firm forgoes future exposure to its own former product, converting crypto holdings into data center buildouts. Miners and technicians tied to the shutting fleet face reassignment or layoffs, while one AI tenant now accounts for most incoming cash.

A Bitcoin miner abandoning mining to become a landlord for AI workloads tests what these companies actually are now. Relying on a single customer for most revenue swaps one kind of volatility, crypto prices, for another, contract renewal risk, and critics will note that is not obviously safer. It also feeds a broader shift of hash rate and infrastructure away from dedicated mining toward AI, raising fair questions about who still secures the Bitcoin network as former miners exit.

The company's own Q4 2026 deadline for shutting down its remaining mining fleet is the date that will confirm whether this pivot is complete or partial. Disclosures on customer concentration, whether that dominant AI tenant diversifies or renews on different terms, will show if the new revenue base is durable. Watch also whether other miners set similar wind-down dates, which would mark a broader industry-wide handoff from mining to AI hosting.

The move was larger before the first headline than after. That is an observation, not an explanation: the market also moves on things nobody publishes.