Power before models. That’s the logic behind Anthropic’s decision to lock in 401 megawatts of dedicated critical IT power under a 20-year lease at a former aluminum smelter in Hawesville, Kentucky. According to TeraWulf’s official announcement, Anthropic executed the lease with TeraWulf subsidiary Raylan Data LLC, with the Justified Data campus projected to supply the committed capacity beginning in the second half of 2027. Full capacity is expected by early 2028.
Why it matters
The numbers are large enough to reframe how you think about AI infrastructure timelines. A $19 billion contracted revenue figure over 20 years, with two five-year extension options, isn’t a capacity reservation. It’s a structural bet that Anthropic’s compute requirements will remain at this scale, or grow, for the next two decades. That kind of commitment doesn’t happen when you think model architectures will solve the compute problem; it happens when you’ve decided physical infrastructure is the constraint that won’t go away.
The site choice is deliberate. Former aluminum smelters carry existing high-voltage grid access, the kind of transmission infrastructure that takes years and hundreds of millions of dollars to build from scratch. Securing a site that already connects to high-voltage grid capacity is meaningfully different from announcing a greenfield data center on agricultural land.
One contingency deserves attention. Per TeraWulf’s announcement, the lease’s investment-grade credit support depends on Anthropic selecting its hardware vendor, a decision expected within approximately four months. That’s a material condition: the credit structure isn’t finalized until the hardware vendor is named. Investors and counterparties watching TeraWulf’s balance sheet should track that timeline.
Context
Simultaneously with the Anthropic deal, TeraWulf announced the sale of its 50.1% stake in the Abernathy Joint Venture to Fluidstack for $530 million, per the announcement. The structure is a capital recycling play: monetize a partial stake in one asset to fund wholly owned expansion in a larger one. The Anthropic lease is the larger one. This pattern has appeared in other AI infrastructure financing, the hub covered the Digital Realty/Blackstone data center deal and KKR’s infrastructure positions as part of the same broader capital concentration trend.
TeraWulf’s homepage describes the company as controlling 2.3 gigawatts of power capacity across its portfolio. The Justified Data campus’s 401 MW is a significant slice of that portfolio committed to a single tenant under a single long-term agreement.
What to watch
Anthropic’s hardware vendor selection, expected within four months, is the most operationally significant near-term milestone. The named vendor will reveal which chip architecture Anthropic is betting on for its 2027-2028 training and inference infrastructure. That decision has implications well beyond this single campus: it’s a signal about which hardware ecosystem Anthropic has committed to at scale. Watch also for whether TeraWulf announces additional hyperscaler-level tenants; a company that can sign a $19B deal with one frontier lab is now a different kind of infrastructure asset than it was 90 days ago.
What to Watch
TJS synthesis
The AI infrastructure land grab isn’t a metaphor. Anthropic just locked in 401 megawatts under a 20-year agreement because that power wasn’t going to be available when they needed it if they waited. The part nobody mentions is that this deal, combined with the SpaceXAI Neocloud positioning and the broader data center capital flows, confirms that the competitive moat in frontier AI is shifting from who has the best model to who secured power access before the grid ran out of headroom. The hardware vendor selection in the next four months will tell us which chip ecosystem Anthropic is scaling into. That’s the next signal.
Sources: CNBC, The Wall Street Journal, TeraWulf.