CleanSpark

Originally founded as a computer hardware and software distributor in 1987, CleanSpark pivoted to the energy sector and agreed to acquire a Bitcoin miner in 2020. By March 2026, the company has grown to control roughly 5% of global hashrate, or the share of power that backs Bitcoin. While its stock languished amid the crypto downturn in 2022 and 2023, the Bitcoin miner has enjoyed a recent rush of investor interest after it repurposed some of its mining operations to build AI data centers.