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IREN Limited (NASDAQ: IREN) disclosed its Q1 2026 operational update this week, revealing a company that has materially completed its pivot from Bitcoin mining to AI infrastructure — and is now expanding into Europe.

The headline numbers: $3.1 billion in annual recurring revenue already under contract, with a target of $3.7 billion by the end of calendar 2026. The 480MW build-out to operational capacity by year-end remains on track. Beyond that, 1,210MW of 2027 capacity is now actively under construction across multiple sites.

What Is Already Contracted

IREN’s 2026 capacity is fully contracted. The $3.1B ARR figure represents locked, multi-year agreements — not pipeline — covering the operational GPU farms that will be online by December. The Microsoft deal (a $9.7 billion contract covering Childress Horizons 1-4) anchors the largest portion; the separately announced five-year, $3.4 billion AI cloud contract with NVIDIA covers additional capacity at Childress with Blackwell GPUs ramping from early 2027.

Cash on hand was $2.6 billion at the end of April, providing capital for the construction schedule without requiring near-term external financing.

European Entry: Nostrum Acquisition

The most significant strategic move in the update is the Nostrum acquisition. Nostrum adds 490MW of data center capacity in Spain and a development pipeline exceeding 1 gigawatt across Europe. The deal gives IREN a non-US regulatory and power environment for the first time — relevant both for customers who need European data residency and for geographic diversification of the construction pipeline.

IREN’s stated target is 5 gigawatts of secured power across North America, Europe, and Asia-Pacific. Nostrum is the European component of that plan. Sites at Sweetwater and Kiowa extend the US portion, with capacity from those sites expected to ramp from 2028.

Software Buildout: Mirantis Acquisition

The Mirantis acquisition addresses a gap that pure-play data center operators typically have: the software layer. Mirantis provides orchestration, deployment management, and operational tooling for GPU-heavy workloads. The acquisition is intended to broaden what IREN can deliver to customers — from raw compute and power to managed infrastructure — and to reduce reliance on third-party software stacks as the fleet scales toward multi-gigawatt capacity.

The Bitcoin Mining Context

IREN was, two years ago, primarily a Bitcoin mining operation. The transition to AI infrastructure is now structural rather than transitional. The company is deploying Blackwell GPUs, signing hyperscaler contracts, acquiring European land and power rights, and building software capabilities. The mining business — running ASIC hardware — is being actively converted to GPU workloads as each facility comes up for redevelopment.

The build pipeline reflects this: Childress Horizons 5 and 6, additional air-cooled Childress capacity, and Sweetwater 1 are all under active construction for 2027 delivery, with none of that capacity allocated to cryptocurrency mining.

Competitive Context

IREN sits below CoreWeave (which disclosed $99.4 billion in backlog and $2.08 billion in Q1 revenue) in scale but is executing a similar strategy: lock hyperscaler and major enterprise contracts at the capacity-planning stage, then build. The Nostrum acquisition differentiates IREN by adding European footprint that CoreWeave does not currently have at comparable scale.

Management’s public characterization of the AI infrastructure market — “structurally short compute, with the bottleneck at delivered data centre and GPU capacity” — is the same thesis that has driven CoreWeave, Fluidstack, and Lambda to similar capital raises in the same quarter. The difference is IREN’s unique combination of low-cost legacy power infrastructure (converted mining sites) and the new NVIDIA partnership providing GPU access and commercial validation.