Anthropic Just Signed a 20-Year Lease With a Former Bitcoin Miner. Read the Fine Print, Not the Press Release.

The bitcoin miners who spent the last four years losing money to halvings and price crashes just found the customer of a lifetime: AI labs that need more electricity than most countries and don't want to build the plumbing themselves.

On July 6, TeraWulf signed a 20-year lease with Anthropic for a 401-megawatt campus in Hawesville, Kentucky, built on the site of a former aluminum smelter. The deal is expected to generate roughly $19 billion in contracted revenue. TeraWulf's own investment: $3 billion to $4 billion, or less than a fifth of what it collects over the lease term. Initial capacity goes live in the second half of 2027, ramping to full scale by early 2028. TeraWulf also sold its majority stake in a separate joint venture to a Fluidstack-led group for roughly $450 million, freeing up cash to plow into more of this exact trade.

TeraWulf isn't the only miner running this playbook. Hut 8 has locked in nearly $16.8 billion in long-term AI and HPC leasing revenue, including a $9.8 billion, 15-year lease signed in May and a $7 billion deal backed by a Google financial guarantee. Cipher Digital has secured $11.4 billion of its own contracted lease revenue. CoinShares now estimates that public bitcoin miners could pull up to 70% of their revenue from AI and HPC leasing by the end of this year, versus roughly 30% a year ago. Contract sizes have grown from 20-to-50-megawatt pilots to 200-to-600-megawatt hyperscale commitments in the same stretch.

What's actually being financed here isn't bitcoin mining infrastructure repurposed for AI. It's a specific asset bitcoin mining happened to accumulate by accident: grid interconnection rights, transmission capacity, and industrial sites already zoned and wired for extreme power draw. That combination takes years to permit and build from scratch. Miners already had it, sitting half-idle as bitcoin economics soured. AI labs needed it yesterday. The lease is the mechanism that lets one side's stranded asset become the other side's bypass around the multi-year queue for new power.

Read against the headline number everyone's been quoting this month — OpenAI and Anthropic capturing 43% of a record $510 billion in H1 venture funding — these lease deals are the part of the AI buildout that never shows up in that statistic. Venture capital funds the labs. It doesn't fund the concrete, the transformers, or the two decades of committed power draw underneath them. That capital is coming from public equity and credit markets, wrapped in the language of commercial real estate, priced off the credit quality of whichever AI company signs as tenant. It's a larger, quieter pool of capital than the funding-round headlines suggest, and almost none of it appears on any lab's cap table.

The framing that should give an investor pause isn't the size of these numbers. It's the duration. A 20-year lease assumes both counterparties look roughly the same, financially, in 2046 as they do today. Bitcoin miners are underwriting that assumption with their entire balance sheet, on the credit of AI labs whose current revenue run rates are impressive but whose 20-year survivability is, definitionally, unproven at this stage of the industry. If AI infrastructure demand ever plateaus or a major lab's economics falter, the miner on the other side of that lease is left holding several hundred megawatts of liquid-cooled, single-purpose real estate built on a former smelter site — an asset with exactly one type of customer in the world.

None of that makes the trade irrational today. Investment-grade credit backing, decades of contracted revenue, and a tenant whose compute demand is currently unlimited is a genuinely attractive proposition for a miner that spent years at the mercy of bitcoin's price. But it's worth naming what this financing structure actually is: AI labs renting their way around equity dilution by pushing 20-year concentration risk onto companies whose main qualification is that they already owned the power hookup. Whether that's smart capital structure or simply relocated risk depends entirely on a timeline nobody currently underwriting these deals can actually see.