Core Sciences, once the largest bitcoin miner, plans to completely shut down bitcoin mining by the fourth quarter of 2026 Core Sciences, once the world's largest bitcoin mining company, announced during its third quarter earnings call that it is accelerating the shutdown of its proprietary bitcoin mining operations. The number of active miners on its network has fallen by nearly 50% compared to the end of 2025, with plans to completely shut down its mining business in the fourth quarter of 2026 and operate solely as a high-performance computing (HPC) provider from 2027. In the third quarter, the company's revenues from colocation reached $215 million (an increase of almost 60% compared to the quarter), and its EBITDA margin increased to 57%. - Link.