IREN stock explained: what it does, how it makes money, and its pivot from bitcoin to AI

The standard $IREN story is "bitcoin miner", and on that story the stock is a leveraged bet on the price of bitcoin. That framing is now out of date, and the company's own numbers say so. In the quarter to June 30, 2026, IREN's AI cloud revenue ($70.5M) passed its bitcoin mining revenue ($66.7M) for the first time, and management says the mining fleet will be largely wound down by the end of 2026.

The more accurate frame: IREN is a power-and-data-center owner that is turning its sites into a GPU cloud, renting NVIDIA hardware to AI labs and hyperscalers, with $MSFT as the anchor customer under a $9.7B contract. That puts it in the same group as the neoclouds rather than the miners, with a different balance sheet and a different risk. This piece walks through what IREN does, how it makes money, where it sits in the AI infrastructure stack, and what the pivot costs. QA figures are as of 2026-10-02 unless noted; live data is on /stocks/iren.

What does IREN do?

IREN builds and operates data centers, and it owns the parts that are hardest to replicate: the land, the buildings and, above all, the grid connections. The company started in 2018 as Iris Energy, a bitcoin miner listed on Nasdaq, and changed its name to IREN as the business moved toward AI.

Its sites fall into two groups:

• Canada: three sites in British Columbia (Canal Flats, Prince George and Mackenzie), about 160 MW in total, powered largely by hydro.
• Texas: Childress (750 MW) and the Sweetwater hub (Sweetwater 1 at 1,400 MW and Sweetwater 2 at 600 MW), about 2,750 MW combined.

In its FY2026 annual report (10-K, filed after the June 30 year-end), IREN lists about 5.6 GW of announced projects, including Kiowa in Oklahoma and early sites in Australia and Spain, and says it holds grid connection agreements for roughly 5 GW. QA's database tracks 2,900 MW of power capacity for the name. The difference is the gap between power that is connected or contracted and power that is still a project on paper.

Inside those buildings, IREN now runs NVIDIA GPU systems (H100, H200, B200, B300 and GB300 per the 10-K, with AMD MI350X and NVIDIA's next generation on order) and rents the compute to customers. In August 2026 it closed the all-share acquisition of Mirantis, a cloud orchestration software company, for about $625M. Mirantis adds the software layer and about 580 staff, so IREN can sell a managed cloud rather than bare racks.

How IREN makes money

IREN reports two revenue lines. For fiscal 2026 (the year to June 30, 2026), per the company's results release:

• Bitcoin mining: $578.2M for the year, but falling fast: $66.7M in Q4 FY26, down about 40% from $111.2M the quarter before, as miners were switched off to free power for GPUs.
• AI cloud services: $128.8M for the year, up roughly eightfold from $16.4M, and $70.5M in Q4 alone.

Total FY26 revenue was $707.0M, which matches the trailing revenue in QA's data. The mining business is the legacy cash flow that funded the build. The AI cloud business is what the market now prices.

The contract book is the core of the AI side. The Microsoft deal, announced in November 2025, is a $9.7B, roughly five-year agreement to deliver NVIDIA GB300 capacity at Childress in four 50 MW phases (the Horizon 1 to 4 buildings), with a 20% customer prepayment and about $1.9B of expected annual run-rate revenue. In August 2026, IREN added a multi-year contract with a frontier AI lab it did not name, and did not disclose the value. QA's database pins contracted backlog at $10B with Microsoft as the anchor customer.

Customer concentration is the headline risk. One customer, Microsoft, is behind most of the contracted revenue, and the 10-K flags "significant customer concentration" as a risk factor. QA's neocloud ranking put Microsoft near 55% of IREN's 2026 revenue, in line with the rest of the group.

Where IREN sits in the AI infrastructure stack

IREN maps onto three QA themes: Neoclouds / GPU-as-a-Service, Compute Capacity and AI Utility. On the bubble side, QA's classifier places it in the Datacenter Power bubble on an extended-tier basis (weight 0.45, correlation 0.46 to the bubble centroid, classified 2026-05-07), not as a core member. That is the honest read: IREN trades partly with the power names and partly with something else.

The something else is the miner-to-AI pivot group. $IREN's tightest correlations in the QA universe over 252 sessions to 2026-10-02 are:

Every name on that list is a former or current bitcoin miner turning powered sites into AI capacity. They move as one group, so holding several of them gives less diversification than it seems.

The useful split inside that group is the business model. TeraWulf and Applied Digital mostly lease powered buildings to tenants who bring their own GPUs: a landlord model with lower capital needs and lower revenue per megawatt. IREN does the opposite. It buys the GPUs and sells the compute, which is the model of CoreWeave ($CRWV) and Nebius ($NBIS). The difference from those two is that IREN owns its sites and power outright rather than leasing them, which removes one layer of cost and one layer of counterparty risk.

The numbers

The loss looks large but is mostly accounting for the pivot: $638.8M of impairments in FY26, mainly from writing off bitcoin mining hardware that is being decommissioned. The adjusted EBITDA line ($245.7M for the year, but only $19.2M in Q4) shows the squeeze in the middle of the transition: mining revenue falls before the GPU revenue fully arrives.

The balance sheet is now a financing machine. IREN reported $5.9B of cash and $7.6B of total debt at June 30, 2026, and in August announced GPU financings, including $3.6B of investment-grade debt at a 6.0% average rate for the Microsoft build and a $2.4B facility at 9.0% for Mackenzie. The price-to-sales multiple of 23.3x is set on revenue that is mostly legacy mining. The Street mean target is an average of analyst estimates, not a QA view or a forecast; on a company this early in a pivot, it mostly measures how much of the $4B contracted run-rate the consensus is willing to count.

The bull case

• The revenue mix has already crossed: AI cloud passed bitcoin mining in Q4 FY26, so the pivot is a reported fact rather than a plan.
• Contracted demand ahead of delivery: $4B of contracted run-rate against $1B operating, with management describing 2026 capacity as largely sold out.
• Owned power is the scarce input. Grid connections take years to secure, and IREN holds agreements for about 5 GW.
• Pricing above $20M per MW on recent three-year contracts, about a two-year payback on the GPUs, with customer prepayments of 45% to 55% of GPU cost on recent deals.
• The Microsoft financing is investment grade, which lowers the cost of the largest single build.

The bear case

• Customer concentration. Microsoft is behind most of the contracted book; a delay, renegotiation or capex cut there would hit the whole thesis.
• Execution. Horizon 3 and 4 are targeted for Q4 2026, and the plan calls for 0.3 GW of IT delivered in 2026 and 0.8 GW in 2027. Any slip pushes revenue out while the debt costs keep running.
• Leverage and dilution. Total debt of $7.6B, several convertible note series due 2029 to 2033, and an all-share acquisition that added stock to the float.
• GPU obsolescence. Contracts run three to five years; the hardware ages faster than that, and the residual value of today's GPUs at the end of a contract is unknown.
• Group risk. IREN moves with the miner-to-AI cohort; a sentiment break in AI infrastructure would re-rate the whole group regardless of IREN's own execution.

How to access IREN

IREN trades on the Nasdaq as IREN, a US listing in US dollars, although the company is incorporated in Australia. To trade it from a US-retail account alongside the rest of the neocloud names, see /stack/ibkr.

On the ETF side, QA's data (2026-10-01) shows a 7.65% weight in the Roundhill Neocloud ETF ($NCLD), the most direct fund exposure, explained in our NCLD piece. It is also a 0.07% sliver of the iShares Expanded Tech-Software ETF ($IGV), too small to matter.

The live page at /stocks/iren carries price, ETF holdings, the full peer table and curated levels. Subscribing to the digest on that page sends a free Ticker Teardown Dossier. Bubble-correlation shifts and rule-based alerts on $IREN are part of /pro.

What to watch

• Next earnings (Q1 FY27, the quarter to September 30): expected in November 2026. One data aggregator lists 2026-11-26; IREN had not confirmed a date as of 2026-10-03.
• Horizon 2 to 4 at Childress: delivery of the Microsoft phases on the Q4 2026 target, the largest single driver of operating run-rate.
• The step from $1B operating to $4B contracted run-rate, and whether new contracts keep pricing at or above $20M per MW.
• The end of mining: management aims to substantially complete the transition by 2026-12-31. After that, the bitcoin price stops being a direct revenue input.
• The curated $43 level (marked 2026-04-25) sits about 3% above the 2026-10-02 close of $41.76. It is an observable reference level, not a trade level or a target.

Live data on this ticker: /stocks/iren. Price, ETF holdings, bubble correlation, curated levels, bot positions.

Bubble context: /bubbles/datacenter-power. The cluster this name belongs to and how it's moving.

QuantAbundance is educational research. Nothing here is investment advice. See /disclosures.