IREN Starts First Phase of $9.7 Billion Microsoft AI Deal, Accelerating Shift From Bitcoin Mining
IREN said it completed the first phase of its $9.7 billion cloud services deal with Microsoft, delivering a 50 MW Horizon 1 AI cloud build in Childress, Texas, and starting capacity supply. The project will scale to 200 MW total IT capacity using Nvidia GB300 GPUs, with later phases in 2026. IREN also raised $3.65B debt in June for GPU spending and plans 480 MW AI capacity in 2026 and 1.2 GW by 2027.
How this was made
The 30-second read
Why it matters
The Horizon 1 completion and designation as an Nvidia Exemplar Cloud are execution and performance validation points that can improve confidence in subsequent phase deliveries and related financing needs.
Market read
Traders may re-rate IREN on milestone delivery quality and the credibility of its AI capacity ramp away from crypto mining.
What to watch
Execution risk remains for 2026 staged deliveries, and the article does not quantify pricing, margins, or contract take-or-pay terms for the delivered capacity.
Background
IREN is transitioning from Bitcoin mining to AI infrastructure, with a five-year $9.7B Microsoft cloud services agreement signed in November 2025.
Ticker impact
IREN completed the first 50-megawatt Horizon 1 AI cloud build-out under its $9.7B Microsoft contract and began supplying capacity.
Likely supportive for the stock versus a no-milestone scenario, with follow-through risk tied to Horizon 2-4 delivery schedules.
The article discloses a specific completed build-out, start of capacity supply, and the contract phase structure, which are actionable execution signals even without new financial guidance.
Market effects
Reinforces demand for liquid-cooled, GPU-intensive data center capacity tied to hyperscaler AI workloads.
Texas data center build-out milestone may support local power and infrastructure utilization narratives.
Highlights ongoing hyperscaler capex allocation toward AI compute and the supply-chain shift from crypto mining to AI HPC.
Counterpoint
A single 50-megawatt phase delivery may not materially change earnings until larger Horizon 2-4 capacity comes online.
Key entities
- public_companyIREN
Data center operator completing Horizon 1 AI cloud deployment and supplying capacity to Microsoft under a $9.7B contract.
- public_companyMicrosoft
Hyperscaler customer receiving AI cloud capacity from IREN under the multi-phase agreement.
- public_companyNvidia
GPU provider whose GB300 units are used, and whose Exemplar Cloud designation is cited for Horizon 1.
