IREN Limited, the Bitcoin miner turned AI infrastructure provider, delivered Horizon 1, its first 50MW AI data center, to Microsoft under a five-year, $9.7 billion cloud services agreement. Horizon 1 is the first of four planned 50MW deployments at IREN's Childress, Texas campus, with the remaining three Horizon deployments expected to be delivered later this year. IREN also achieved Nvidia's 'Exemplar Cloud' status after Nvidia tested its GB300 NVL72 deployment at Horizon 1, indicating the infrastructure met Nvidia's requirements for supporting demanding AI workloads. IREN stock jumped as much as 7.2% in pre-market trade and was among the top trending tickers on Stocktwits. Daniel Roberts, IREN's co-founder and co-CEO, said delivering Horizon 1 demonstrates the company's vertically integrated model and ability to execute complex AI infrastructure projects. IREN said it remains on track to reach 480MW of gross AI Cloud capacity by the end of 2026, with a longer-term target of 1.2GW in 2027. MSFT stock edged 0.8% higher in morning trade. The company's expansion is part of a broader shift among Bitcoin miners toward AI infrastructure, also pursued by Core Scientific, TeraWulf, and Cipher Mining.