Anthropic Locks In 401 MW, $19 Billion Data Center Lease With TeraWulf in Kentucky

Anthropic has signed a 20-year lease with TeraWulf Inc. for a purpose-built 401-megawatt data center campus in Hawesville, Kentucky, generating approximately $19 billion in contracted revenue for the infrastructure company. The deal, announced Monday, is one of the largest long-term AI infrastructure commitments in history and signals a decisive shift: frontier AI labs are no longer content to rent compute by the hour from hyperscalers. They want to own the room.

The campus, called Justified Data Campus, sits about an hour southwest of Louisville in Hancock County. TeraWulf — a company that made its name in Bitcoin mining before pivoting aggressively toward AI infrastructure in 2024 — will build out the facility in multiple phases. Initial capacity is expected to come online in the second half of 2027, with the full 401 megawatts operational by early 2028.

A Deal That Moved Markets

The announcement sent TeraWulf’s stock soaring more than 16% in premarket trading. Alongside the Anthropic lease, TeraWulf also disclosed the sale of a majority interest in its Abernathy joint venture to Fluidstack — a deal worth approximately $530 million — signaling that the company is sharply refocusing its portfolio around the long-term AI opportunity rather than spreading its bets across legacy assets.

“The Anthropic lease validates our strategy and establishes a long-duration revenue stream with one of the world’s leading AI companies,” said Paul Prager, TeraWulf’s CEO. The lease is expected to be backed by investment-grade credit from Anthropic — a requirement that carries weight. For Anthropic to backstop $950 million in annual lease obligations (the average annualized value of the $19 billion deal), it must present as a financially durable, going-concern business well into the 2040s.

The Infrastructure Arms Race Reaches AI Labs

Until recently, the capital-intensive buildout of data center infrastructure was the exclusive domain of hyperscalers: Microsoft, Google, Amazon, and Meta. AI labs trained on rented cloud capacity and inference flowed through third-party providers. That model is changing fast.

Microsoft has committed more than $80 billion to AI infrastructure in fiscal 2026. Google guided $75 billion in capital expenditure for the same year. Amazon continues its multi-year buildout at undisclosed but comparable scale. Now Anthropic — with a valuation exceeding $60 billion and growing enterprise revenue — is joining this tier.

At 401 megawatts, the Justified Data Campus would rank among the largest single-tenant AI compute facilities in the United States. A typical hyperscale data center runs between 20 and 100 megawatts; a facility north of 400MW is the kind of infrastructure usually associated with national-scale deployments or the biggest cloud regions. For an AI lab to own that much dedicated capacity represents a genuine step change in compute ambition.

The dedicated campus model also offers something cloud rental cannot: predictability. Long-term leases at known rates decouple Anthropic’s infrastructure cost from the volatile spot market for GPU cloud capacity, where demand spikes and supply constraints can double or triple prices overnight.

Why Kentucky?

Kentucky has quietly become one of the most attractive states for large-scale data center development in the United States. The state offers competitive electricity rates — particularly for industrial customers drawing hundreds of megawatts — a relatively cool climate that cuts cooling costs, and proximity to the fiber backbone running through the Ohio Valley corridor.

Hawesville itself, in Hancock County along the Ohio River, has an industrial heritage in aluminum smelting and heavy manufacturing. As traditional manufacturing footprints have contracted across the Rust Belt, counties like Hancock have actively courted data center development as a replacement anchor industry — offering tax incentives and fast-tracking permitting for large infrastructure projects.

TeraWulf’s background in high-density power infrastructure gives it a specific edge here. Bitcoin mining at scale requires exactly the same capabilities as AI data centers: bulk power procurement, high-density cooling, and around-the-clock reliability engineering. The company knows how to negotiate with utilities, manage large transformer deployments, and build out the physical layer that AI compute requires.

The $19 Billion Question

Averaging $19 billion over 20 years yields roughly $950 million per year — or approximately $2.37 per watt of installed capacity annually. That’s a meaningful premium above typical co-location pricing and reflects both the scarcity of purpose-built, large-scale AI facilities and Anthropic’s willingness to pay for guaranteed availability over the long term.

The investment-grade credit backing is the most financially interesting detail in the disclosure. Credit-backed long-term leases are the structure that institutional real estate investors use to finance mission-critical infrastructure. TeraWulf has indicated it will explore financing options using the Anthropic lease as collateral — potentially unlocking significant additional capital to fund expansion to new campuses. In effect, Anthropic’s creditworthiness becomes the engine for TeraWulf’s next phase of growth.

Strategic Context for Anthropic

The timing of the deal — July 2026 — comes as Anthropic is navigating a pivotal moment. Claude Sonnet 5 launched in late June as the most capable mid-tier agentic model the company has built. Fable 5, its frontier model, was restored to full global availability on July 1 after a brief export control restriction. Enterprise revenue has reportedly surged, with multiple reports indicating Anthropic is growing faster than OpenAI on a percentage basis.

Building a 401MW dedicated data center is a statement of intent about what comes next. Anthropic is not positioning itself as a research lab with commercial products bolted on. It is investing like a company that expects to train multiple future generations of frontier models at ever-larger scale and run inference for tens of millions of enterprise users simultaneously.

The Justified Data Campus will not be online until 2027. The models that will run there are not yet built. That is precisely the point: at the frontier of AI development, the infrastructure bets made today determine competitive position three years from now.

What Comes Next

Ground preparation at Justified Data Campus will begin in the coming months. The multi-phase buildout means Anthropic will be ramping into the facility over approximately 18 months, reaching full 401 MW by Q1 2028.

TeraWulf, buoyed by the lease announcement and the Abernathy sale proceeds, is expected to announce additional campus development plans later this year. The company has previously indicated interest in sites in the Southwest and Southeast, where power costs are low and land is abundant.

For the broader AI infrastructure market, the Anthropic-TeraWulf deal is a data point about the new normal. Frontier AI labs now operate on timelines and at scales that require generational infrastructure commitments. The race to build the physical backbone of AI is no longer a hyperscaler story — it belongs to the entire industry.