CleanSpark

CleanSpark (CLSK), a bitcoin miner that owns and runs its own data centres in Georgia, Tennessee, Mississippi and Wyoming, earning by turning cheap electricity into mined bitcoin. It began as an energy software and microgrid company, sold that business off, and has mined bitcoin since December 2020. In 2025 it began developing sites for AI and high-performance computing hosting as well. CLSK on Robinhood Chain is a Robinhood Stock Token, a tokenised debt security issued by Robinhood Assets (Jersey) Limited and backed by CleanSpark shares held in custody at Alpaca Securities.