$IREN
What happened
Shares of IREN Limited (NASDAQ: IREN) closed at $46.15 on September 24, up 22.2% from the December 31, 2025 close of $37.77.
The direct business explanation is the company’s move from Bitcoin mining toward contracted AI cloud capacity. Large customer agreements, financing and the first Horizon facility delivery made that transition more credible during 2026.
The decisive number is less settled. At the August results, management reported $4 billion of contracted AI Cloud annual recurring revenue for 2026 capacity, but only $1 billion was operating.
That gap is the investment case in one line: demand has been contracted, while most of the physical capacity still has to be finished, switched on and turned into recognized revenue.
The move in numbers
Dividing the September 24 close by the December 31 close and subtracting one gives 22.2%. The calculation uses the same ordinary shares and U.S. dollar raw closing-price field at both endpoints, with no dividend reinvestment.
Nasdaq reports the same endpoints at $37.77 and $46.15, matching Yahoo to the displayed cent. Yahoo returned no split event in the period, so there is no identified corporate-action break in the comparison.
The September 25 regular session was still open when this article was prepared. September 24 is therefore the latest completed session rather than a stale or intraday endpoint.
The operating comparison is $1 billion divided by $4 billion, or 25%. Put differently, 75% of contracted AI Cloud ARR was not yet operating at the August report.
ARR is management’s annualized run-rate measure. It is useful for judging contracted scale, but it is not the same as revenue already recognized under accounting rules.
How the business works
IREN Limited (NASDAQ: IREN) owns the land, power access, data centers, computing hardware and software used to deliver AI cloud services. Customers can rent dedicated GPU capacity for model training and inference through bare-metal or managed-cloud products.
The model starts with scarce power. The company reported a 5-gigawatt global power pipeline and 40 megawatts of operating AI Cloud capacity at June 30. Owning the infrastructure can give it more control over construction and energy costs, but it also leaves the company carrying more capital and delivery risk.
CoreWeave, Inc. (NASDAQ: CRWV) and Nebius Group N.V. (NASDAQ: NBIS) are among the specialized AI-cloud competitors named in the annual filing. They compete for GPUs, customers, financing and software talent. Hyperscale cloud providers add another layer of pressure through broader software ecosystems and customer relationships.
IREN Limited (NASDAQ: IREN) still entered this transition from Bitcoin mining. Fiscal 2026 AI Cloud Services revenue was $128.8 million, while Bitcoin Mining revenue was $578.2 million. Management says it intends to be substantially out of Bitcoin mining by December 31, 2026.
The broader demand backdrop is real but should not be mistaken for a revenue forecast. The International Energy Agency expects data-center electricity use to rise from about 485 terawatt-hours in 2025 to 950 terawatt-hours in 2030, while warning that grid and equipment bottlenecks can slow projects.
What changed in 2026
On May 7, IREN Limited (NASDAQ: IREN) announced a five-year, $3.4 billion AI cloud contract with NVIDIA Corporation (NASDAQ: NVDA) and a broader 5-gigawatt partnership. The agreement gave the strategy a large customer and a defined path for new capacity.
On July 20, the company disclosed another $2.8 billion of customer contracts and said roughly 85% of its planned 2026 AI Cloud ARR was under contract. Customer prepayments were expected to cover about 45% of the related GPU spending, reducing the amount that had to be funded upfront.
The August 27 results moved the story from contracts toward delivery. Horizon 1 had been handed over to its customer, Horizon 2 was being commissioned, and Horizon 3 and Horizon 4 were in late-stage construction for targeted fourth-quarter delivery.
Management also said recent three-year contracts carried more than $20 million of revenue per megawatt and an estimated two-year payback. Those are company estimates, not guarantees. Utilization, uptime, financing expense and future GPU prices will determine the actual return.
The transition is expensive. Fiscal 2026 produced $707.0 million of revenue but a $702.6 million net loss, including a $638.8 million noncash impairment. Adjusted EBITDA fell to $245.7 million from $269.7 million as staffing and platform costs arrived before much of the new AI revenue.
Explain the financial terms
A fiscal quarter is a three-month period in the company's reporting year.
The risks
The strongest counterargument is simple: contracted demand is ahead of operating capacity. Delays in power, networking, construction or GPU delivery would postpone revenue while financing and depreciation continue.
Customer concentration matters too. A few large contracts can make the backlog look secure, but a customer delay or renegotiation can affect a large share of the expected economics. GPUs can also lose value quickly as newer hardware arrives.
The funding package reduces some upfront cash pressure without removing the cost. Management said customer prepayments should cover 45% to 55% of GPU capital spending and $2.8 billion of GPU financing should cover about 90% of associated hardware costs.
The Bitcoin exit adds another timing risk. Mining still supplied most fiscal 2026 revenue, so shutting capacity before AI services scale could create a temporary earnings gap.
A strong data-center market can coexist with a weak investment if construction slips, pricing falls, hardware ages faster than expected or repeated debt and share issuance dilute the economics per share.
What's next
The next observable test is delivery, not another contract headline. Horizon 2 through Horizon 4 are supposed to move into service around the fourth quarter of 2026.
Watch operating AI Cloud ARR, recognized AI Cloud Services revenue, adjusted EBITDA and cash generation together. The case strengthens if the 25% operating share rises while margins and financing remain disciplined.
It weakens if contracted ARR stays far ahead of live capacity, customer timelines move or capital needs grow faster than operating cash. The Bitcoin wind-down also cannot remove earnings faster than AI services replace them.
The 22.2% share gain shows that the market has rewarded progress. The next financial reports have to show that contracted demand can become operating, profitable and durable capacity.
Explain the financial terms
A fiscal quarter is a three-month period in the company's reporting year.