IREN shares initially rallied on news that Microsoft accepted its Horizon 1 facility, while TeraWulf saw modest gains and Cipher Digital declined 5 percent amid sector-wide valuation adjustments.
Former Bitcoin (CRYPTO:BTC) miners pivoting to AI infrastructure saw heightened trading activity Friday morning following a landmark acceptance milestone. IREN (NASDAQ:IREN) initially rallied 6% to $45.26 after Microsoft (NASDAQ:MSFT) formally accepted Horizon 1, the first of four data centers being constructed for the hyperscaler at IREN’s Childress, Texas campus. Within the first hour of trading, however, shares retreated to $42.54, effectively erasing the early gains.
In related moves, TeraWulf (NASDAQ:WULF) advanced 1% to $16.61, while Cipher Digital (NASDAQ:CIFR) diverged, dropping 5% to $16.35. Microsoft remained essentially unchanged at $481.27, and NVIDIA (NASDAQ:NVDA) traded flat at $216.96. The Global X Data Center and Digital Infrastructure ETF (NASDAQ:DTCR) held steady at $28.47.
IREN confirmed that Horizon 1 has been delivered and formally accepted by Microsoft. The hyperscaler utilized a five-day testing window to verify the deployment against agreed-upon standards; upon approval, IREN received authorization to commence monthly billing. This milestone generates the first billable revenue under a five-year, $9.7 billion contract, transitioning the agreement from a committed paper deal to invoiced cash flows. Concurrently, NVIDIA tested the facility using its GB300 systems and awarded Exemplar Cloud status—a designation reserved for operators meeting strict performance and reliability benchmarks.
For IREN, the primary bear thesis has historically focused on financing an AI buildout that costs multiples of current revenue. Today’s acceptance directly addresses that concern. The company has secured a $3.65 billion investment-grade debt facility, fully collateralized by the Microsoft contract, which covers nearly all GPU expenditures associated with the deal. Prior to this financing, IREN carried approximately $1.75 billion in net debt. Beyond the Microsoft agreement, IREN also maintains a separate five-year, $3.4 billion cloud contract with NVIDIA. Despite these developments, more than 25% of IREN’s float remains sold short, with much of that positioning predicated on the assumption that the AI pivot will fail or that debt burdens will overwhelm the business.
In its latest quarterly report, IREN posted total revenue of $144.8 million, a 22% sequential decline, and reported a $0.30 per-share loss versus a consensus estimate of $0.21. AI cloud services revenue surged 94% sequentially, offsetting a sharp contraction in Bitcoin mining revenue. Valued at a $16.17 billion market capitalization, IREN controls five gigawatts of secured power globally and recently completed its acquisition of Mirantis, a cloud infrastructure software and services provider.
TeraWulf operates the Lake Mariner campus in New York, featuring 102 MW of revenue-generating critical IT capacity and 336 MW under construction. The company holds approximately 839 MW of contracted critical IT capacity under long-term leases with clients including Anthropic, Fluidstack, and Core42, supported by a broader development pipeline of roughly 2.1 GW. (We profiled seven key power, cooling, and networking suppliers driving this expansion in a complimentary AI infrastructure report.) TeraWulf’s modest gain today largely reflects positive read-through from IREN’s announcement rather than company-specific catalysts.
Cipher Mining maintains 700 MW of contracted gross HPC capacity across its Black Pearl, Barber Lake, and Stingray campuses, representing approximately $11.4 billion in contracted revenue. The company targets a total portfolio capacity of 5.3 GW by 2030. Among the three names tracked, Cipher Mining exhibited the smallest price movement today, as its contracted capacity is already widely disclosed and no new operational milestones were announced.
Microsoft and NVIDIA served as the validating counterparties for IREN today, yet both stocks remained flat. The contract represents a transformative inflection point for a $16.17 billion enterprise but remains financially immaterial to Microsoft ($3.58 trillion market cap) and NVIDIA ($5.24 trillion market cap).
The Global X Data Center and Digital Infrastructure ETF (DTCR) is a narrowly focused thematic fund heavily weighted toward data center and digital infrastructure equities, exposing investors to sector-concentration risk significantly higher than broad-market technology funds. Its top holdings—Equinix, Digital Realty Trust, and American Tower—create a risk profile distinct from the pure-play AI infrastructure names experiencing volatility today.
On the sell side, Bernstein’s Gautam Chhugani reiterated a Buy rating with a $100 price target for IREN, while Needham’s John Todaro maintained a Hold. Across 15 covering analysts, the consensus stands at Moderate Buy, comprising 11 Strong Buy, three Hold, and one Strong Sell ratings, with a mean price target of $78.64.
Investors should monitor subsequent analyst commentary regarding the timing of IREN’s Horizon 1 revenue ramp, with Microsoft-related revenue projected to begin scaling in Q3 FY2026. Given the stock’s elevated beta of 4.302 and substantial short interest, position sizing should account for heightened volatility as today’s price action faces final settlement at the closing bell.
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