IREN Shares Climb 6% as Microsoft Accepts First Phase of $9.7 Billion Data Center Deal
Key Takeaways
- •IREN's stock gained approximately 16% over two trading sessions following Microsoft's formal acceptance of the Horizon 1 data center phase.
- •Microsoft approved the initial milestone of a $9.7 billion multi-phase agreement without any reported issues, marking it as officially fulfilled.
- •The contract between IREN and Microsoft was signed in November 2025 and ranks among the largest AI infrastructure deals relative to IREN's company size.
- •IREN, formerly Iris Energy, is transitioning its renewable-energy Bitcoin mining infrastructure toward AI cloud computing services as part of a broader industry trend.
- •IREN has not publicly disclosed financial details for Horizon 1 or provided timelines for subsequent phases, leaving execution risk as a key concern for investors.
IREN Limited (IREN) shares rose approximately 6% on Thursday morning, trading near $46 per share. The advance follows a 10% gain on Wednesday, bringing the stock's two-day increase to roughly 16%.
The rally came after IREN announced that Microsoft (MSFT) had formally accepted delivery of Horizon 1, the initial phase of a major data center project between the two companies. Microsoft signed off on the completed phase without any reported issues, according to a press statement released by IREN on Thursday.
The $9.7 billion agreement between IREN and Microsoft was originally signed in November 2025. Horizon 1 represents the first completed milestone under that contract. IREN confirmed in its statement that Microsoft had formally accepted the delivered phase, marking it as officially fulfilled.
No financial breakdown specific to Horizon 1 was disclosed in the announcement. The total contract value across all phases stands at $9.7 billion.
The deal ranks among the largest AI infrastructure contracts relative to IREN's size, and each milestone carries significance for investors monitoring the project's execution. The successful acceptance of Horizon 1 provides tangible evidence that the multi-phase agreement is advancing on track, a key consideration given the contract value far exceeds IREN's own market capitalization.
IREN, formerly known as Iris Energy, is an Australian company that originally focused on Bitcoin mining using renewable energy assets. The company has been repositioning its high-powered computing infrastructure toward AI cloud services, part of a broader industry pattern in which former crypto mining operators have pivoted to meet surging demand for AI compute capacity. The Microsoft agreement has been central to that strategic shift since it was announced in late 2025.
The demand for large-scale AI data center capacity has intensified as major technology companies race to secure infrastructure capable of supporting next-generation AI workloads. Microsoft's acceptance of Horizon 1 reflects the competitive pressure among hyperscalers to lock in operational compute capacity through long-term partnerships rather than building exclusively in-house.
Wednesday's 10% gain followed the initial Horizon 1 announcement. Thursday's further 6% advance indicated continued market reaction as investors processed the details.
With Horizon 1 now accepted, focus shifts to the next stages of the phased rollout. IREN has not publicly provided a specific timeline for subsequent phases. Execution risk will likely remain a focal point for investors, as any delays or performance shortfalls in future phases could materially affect the company's revenue trajectory and its ability to deliver on the full $9.7 billion commitment.
Source: CoinCentral
