Business Overview: IREN Limited (Nasdaq: IREN)

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Executive Summary

IREN Limited (formerly Iris Energy Ltd) is a vertically integrated data center and compute company that is in the middle of transforming itself from a Bitcoin mining operator into an AI Cloud Services platform. IREN owns and operates the full stack behind its business — the land, power infrastructure, grid connections, data center buildings, and the GPU compute and software layers on top — rather than leasing capacity from third-party colocation providers, a structural choice that increasingly looks like its core competitive advantage as AI compute demand strains global power availability.

IREN matters right now because of the scale and speed of its pivot: as of June 30, 2026 the company still operated roughly 23.2 EH/s (~380MW) of Bitcoin mining capacity but had begun decommissioning those miners, targeting substantial completion of the transition to AI Cloud by December 31, 2026. That pivot was dramatically validated in November 2025 when Microsoft signed a ~$9.7 billion, multi-year AI compute deal with IREN to secure next-generation Nvidia chip capacity — pushing IREN's contracted AI Cloud annual recurring revenue (ARR) to roughly $4 billion and transforming it from a crypto-adjacent miner into a credible, large-scale AI infrastructure provider.

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1. Core Business Model & How They Work

IREN's model is built on vertical integration: it develops its own power and data center infrastructure rather than renting someone else's, then monetizes that infrastructure through two very different businesses that share the same underlying assets (land, power, buildings).

[ Secure Land & Grid Connection ] ➡️ [ Build Power Infrastructure & Data Centers ] ➡️ [ Deploy Compute (GPUs or ASIC Miners) ] ➡️ [ Monetize: AI Cloud (Reserved Capacity Contracts) OR Bitcoin Mining (Sell Mined BTC Daily) ]

Key Operational Drivers

1. Owned, vertically integrated infrastructure: IREN develops its own data centers — including the land, grid connections, and substations — rather than depending primarily on third-party colocation, giving it more control over cost, power availability, and build timelines than a pure cloud reseller.
2. Multi-year reserved-capacity contracts for AI Cloud: AI Cloud Services revenue is generated under bare-metal and managed cloud compute contracts, typically multi-year and reserved-capacity in structure; revenue generally begins only once capacity is delivered, commissioned, and accepted by the customer — meaning today's contracted backlog (ARR) and today's recognized revenue can diverge substantially.
3. A deliberate pivot away from Bitcoin mining: Bitcoin mining revenue has historically funded the company (still $578.2 million in fiscal 2026), but IREN is actively decommissioning that capacity in favor of AI Cloud, converting power and sites originally built for mining into AI data center capacity.
4. Massive, front-loaded capital deployment: IREN ended fiscal 2026 with $5.9 billion in cash (plus $1.7 billion in restricted cash), and states it has cash, committed GPU financing, and prepayments totaling roughly $14 billion — capital raised specifically to build out gigawatt-scale AI infrastructure ahead of contracted demand.

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2. Business Segments

IREN does not report formal reportable segments, but its operations split clearly into two businesses with very different trajectories.

                        ┌───────────────────────────────┐
                        │          IREN Limited           │
                        └────────────────┬────────────────┘
                                          │
            ┌─────────────────────────────┼─────────────────────────────┐
            ▼                                                           ▼
  ┌────────────────────────┐                                ┌────────────────────────┐
  │     AI Cloud Services    │                                │     Bitcoin Mining      │
  │  (~18% of FY26 revenue,  │                                │  (~82% of FY26 revenue, │
  │   strategic priority,    │                                │   being wound down,     │
  │   ~40MW operating,       │                                │   ~23.2 EH/s / ~380MW,  │
  │   ~5GW contracted/LOA)   │                                │   target substantially  │
  │                           │                                │   complete by Dec 2026) │
  └────────────────────────┘                                └────────────────────────┘

AI Cloud Services (the strategic future)

Revenue grew roughly 8x year-over-year to $128.8 million in fiscal 2026 (from $16.4 million in fiscal 2025) — still a small share of total revenue today, but the segment IREN is pouring capital into. Operating capacity stood at roughly 40MW as of fiscal year-end, with ~5GW of total power capacity covered by executed grid connection agreements or letters of agreement across the US, Canada, Spain, and Australia — the pipeline for where AI Cloud capacity will come from over the next several years.

Bitcoin Mining (the legacy business being wound down)

Still the larger revenue contributor in fiscal 2026 at $578.2 million, Bitcoin mining is nonetheless being actively decommissioned. The company typically sells mined Bitcoin daily rather than holding it on the balance sheet (it held none at June 30, 2026), limiting its direct exposure to Bitcoin price swings on existing holdings, though mining economics themselves remain fully exposed to Bitcoin's price and network difficulty.

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3. Product Portfolio

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4. Competitive Landscape

IREN's competitive set has shifted dramatically along with its own business mix — it now names itself alongside AI infrastructure players rather than crypto miners.

• Hyperscalers (Amazon Web Services, Google Cloud, Microsoft Azure, Oracle Cloud): Vastly larger scale and balance sheets, but also, notably, a customer — Microsoft itself signed the ~$9.7 billion AI compute deal with IREN, illustrating that even hyperscalers sometimes need to buy incremental capacity from infrastructure specialists rather than building fast enough on their own.
• Specialized AI cloud/neocloud providers (CoreWeave, Nebius, Crusoe, Lambda, Nscale, SpaceX): IREN's most direct competitive peer group — companies built specifically to provide GPU cloud capacity to AI labs and enterprises, competing on the same axes of secured power, access to next-generation chips, construction speed, and capital access.
• Competitive factors IREN itself names: secured and energized power, access to current- and next-generation compute, construction speed, capital access, and cost — a list that puts IREN's vertically integrated, owned-power model front and center as its differentiator, since power availability has become the binding constraint on AI data center growth industry-wide.

The filing is candid that many competitors have greater financial, technical, or commercial resources — IREN's relative edge is less about size and more about the speed and control it gets from developing its own power and land rather than waiting on third-party colocation capacity.

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5. Strategic Strengths & Risks

Strengths

• Owned power and land, not leased colocation: In an industry where power availability — not chips — is often the binding constraint, IREN's control over its own grid connections and substations across multiple geographies (Texas, Oklahoma, British Columbia, South Australia, Spain) is a real structural advantage over competitors dependent on third-party data centers.
• A validated hyperscaler relationship: The ~$9.7 billion Microsoft deal (announced November 2025) is a powerful signal — a hyperscaler of Microsoft's scale and sophistication chose to contract with IREN for Nvidia chip capacity rather than build or buy elsewhere, materially de-risking the AI Cloud pivot's commercial viability.
• Enormous near-term capital base: $5.9 billion in cash plus roughly $14 billion in total cash, committed GPU financing, and prepayments gives IREN runway to build out gigawatt-scale capacity ahead of demand, a rare position for a company of its size.
• A cash-generative legacy business funding the pivot: Even as it's wound down, Bitcoin mining generated $578.2 million in fiscal 2026 revenue, helping bridge the gap while AI Cloud ramps.

Risks

• Execution risk on a massive buildout: ~5.6GW of announced gross capacity across nine sites is an enormous construction and energization undertaking; delays in any single site (the filing specifically flags Texas ERCOT/SB 6 regulatory changes as a source of energization delay risk) could push back revenue recognition on already-contracted ARR.
• The gap between contracted ARR and recognized revenue: Of the roughly $4 billion in contracted AI Cloud ARR, only about $1 billion was operating as of late August 2026 — a large portion of the company's forward valuation rests on capacity that does not yet generate revenue.
• Massive non-cash impairments and swing to net loss: Fiscal 2026 net loss was $(702.6) million (versus net income of $86.9 million in fiscal 2025), driven by $638.8 million in non-cash asset impairments — a reminder that the pivot away from Bitcoin mining carries real write-off costs on now-obsolete mining infrastructure.
• Customer concentration in AI Cloud: The filing explicitly flags significant concentration in the AI Cloud customer base (Microsoft being the most visible example) and related counterparty credit exposure — the inverse of the Microsoft deal's upside is dependence on a small number of very large relationships.
• Residual Bitcoin price exposure and GPU supply dependence: The remaining mining business still depends on Bitcoin's historically volatile price, while the AI Cloud business depends on a limited number of GPU/equipment suppliers (Nvidia, AMD, Dell, Lenovo, Supermicro) amid rapid hardware obsolescence cycles.

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6. Financial Overview

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7. Summary Conclusion

IREN is executing one of the more dramatic business-model pivots in the current market: a vertically integrated owner of power and data center infrastructure that built its first revenue base on Bitcoin mining and is now redeploying that same infrastructure advantage into AI Cloud Services, validated in dramatic fashion by a roughly $9.7 billion Microsoft compute deal that pushed contracted AI Cloud ARR to roughly $4 billion. The company's real moat is its owned power and land across multiple geographies — a genuine scarce asset in an industry where power, not chips, increasingly gates growth — backed by an enormous ~$14 billion capital base to fund the buildout. But the fiscal 2026 numbers also show the pivot's real cost: a $(702.6) million net loss driven by nearly $640 million in non-cash impairments on the mining assets being retired, and the fact that only about a quarter of contracted AI Cloud ARR was actually operating as of late August 2026. Whether IREN successfully converts its massive capital base and power portfolio into recognized, diversified AI Cloud revenue — without the execution delays and customer-concentration risk the company itself flags — will determine whether this becomes a genuine AI infrastructure success story or an expensive, impairment-laden transition.