Shares of Riot Platforms (NASDAQ: RIOT) rose after hours following news of a substantial long-term agreement for data center capacity tied to artificial intelligence workloads. The Bitcoin mining firm, which has been expanding into high-performance computing and AI hosting, disclosed a multi-year lease that market reports later linked to Anthropic, the company behind the Claude AI models. Riot Platforms revealed it had entered into a 20-year arrangement to provide 191 megawatts of IT capacity at its Rockdale campus in Texas. The arrangement forms part of Anthropic’s broader efforts to lock in substantial computing resources amid strong demand for its AI systems. Bitcoin miners with access to significant power capacity and land have increasingly found opportunities to repurpose or expand facilities for data center use.