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1. Google Backstops Anthropic's Lease at TeraWulf's Kentucky Campus
Google could become a part owner of a data center project developed by bitcoin miner TeraWulf if Anthropic fails to meet its rental obligations, according to agreements disclosed in a TeraWulf filing with the U.S. Securities and Exchange Commission on Wednesday, November 4, 2026. The arrangement stands behind a 20-year, $19 billion lease covering 401 megawatts of computing capacity.
Under the terms, Google agreed to guarantee Anthropic's obligations as tenant at TeraWulf's Kentucky campus. The backstop is intended to help TeraWulf obtain financing for the build-out, since lenders typically want assurance that rent will keep flowing for the life of a project that requires billions of dollars in construction spending.
The unusual part is not the guarantee itself but what Google receives in return for standing behind the tenant. If Anthropic stops paying, the technology company does not merely absorb a loss: it gains rights to take over the lease or, in defined circumstances, to buy into the entity that owns the project.
Capacity is expected to start arriving in late 2027, and TeraWulf expects deliveries to continue through the second quarter of 2028. The agreements themselves were signed on November 4.
The disclosure gives investors an early view of how the risks in large AI data center leases are being divided among the tenant, the landlord and a third-party guarantor.
2. How Could Google Take an Ownership Stake?
Google could acquire an ownership stake only after a default or insolvency event involving Anthropic, and only through a specific route. If Anthropic fails to pay rent or becomes insolvent, Google has the right to step in as the tenant and assume the lease. Under certain conditions, it can instead pay a termination fee and receive an equity interest in Raylan Data, the TeraWulf subsidiary that operates the project.
The size of that interest is set by a formula. The termination fee Google pays is divided by the total cost of the project, a figure that includes land, infrastructure, equipment and financing. A payment equal to 30% of total cost, for example, would translate into a 30% stake in the subsidiary.
This structure ties ownership directly to the amount of money Google puts in. It avoids a negotiated valuation at the moment of distress, since the stake follows mechanically from what Google pays relative to what was spent building the facility.
One point deserves emphasis: any stake Google obtains would be in the project subsidiary, not in publicly traded TeraWulf. Shareholders of the miner would therefore not see Google become an owner of the parent company under this provision.
3. What Conditions Limit Google's Options?
The right to take a stake is not unconditional. For the first six years after Google's support takes effect, Google generally must take over the lease rather than terminate it and buy into the project. That requirement keeps the tenant relationship in place during the period when the facility is newest and the financing is most exposed.
There is one exception. It applies if the Google-built TPU pods installed in the data halls can operate on less than half of the power reserved for the tenant. TPUs are Google's own artificial intelligence chips, and the clause suggests that the hardware in the facility is relevant to how much of the reserved power would remain useful to a replacement occupant.
The guarantee also has an expiry. Google's obligations end if Anthropic, or a parent or subsidiary of Anthropic, holds an investment-grade credit rating for at least three months. In practical terms, once the tenant is judged strong enough by rating agencies, the backstop is no longer needed and Google is released.
Support is phased as well. Google's backing for each of the three leased sections begins only when the final data hall in that section is delivered, so protection arrives in step with the physical build rather than all at once.
4. What Does Step-In Right Mean in a Lease Guarantee?
A step-in right allows a guarantor to take the place of a defaulting party instead of simply paying damages. In this case, Google can become the tenant and continue occupying the capacity under the same lease terms, so the landlord keeps receiving rent and the facility stays in operation without a gap.
This differs from an ordinary guarantee, in which the backer writes a check to cover missed payments and the relationship ends there. A step-in arrangement gives the backer a say in what happens to the asset, and in the Google case it creates an optional route to partial ownership that depends on the termination fee it chooses to pay.
For the tenant, the structure is a form of credit support. Anthropic gains the ability to commit to a very large, long-dated lease because a counterparty with a stronger balance sheet has agreed to cover the downside. For the landlord, it narrows the range of bad outcomes, because the lease continues or is bought out rather than ending in a dispute over a half-built campus.
5. Why Do Lenders and Landlords Want a Credit Backstop?
Data centers built for a single AI tenant concentrate risk. The landlord spends heavily on buildings, power systems and cooling before the first dollar of rent arrives, and the lease is the main asset that supports the loans. If the tenant is a fast-growing AI developer whose finances are still evolving, lenders may demand additional comfort, such as a guarantee from a larger and better-capitalized company.
Google fills that role here. Its obligation to cover Anthropic's lease makes the project easier to finance, and the step-in rights give it a measure of control over the asset it is protecting. For TeraWulf, the arrangement converts a very large lease with a young tenant into one that lenders can underwrite with more confidence.
For Google, the mechanism offers a path into ownership of data center capacity without having built it. Taking over a lease or buying a proportional share of a completed facility would give the company access to power and space that are scarce, since electricity supply and construction timelines are among the main constraints on expanding AI computing.
6. How Large Is the Commitment in Practical Terms?
The 401 megawatts covered by the lease is a measure of the electrical load the facility is designed to supply, and in the data center industry power capacity is the standard way to describe size. Reserved power determines how many chips can be installed and how much computing the tenant can run, which is why the exception tied to the TPU pods refers to power consumption.
At $19 billion over 20 years, the lease implies an average of roughly $950 million per year in rent, a simple division of the stated total by the stated term. Payments of that scale explain why the lenders financing construction would want protection against a missed payment, and why the guarantee covers each of the three leased sections as they come into service.
Because the stake formula divides Google's payment by total project cost, the larger the build, the larger the sum Google would need to pay for any given percentage. A stake equal to the 30% example would require a payment equal to 30% of everything spent on land, infrastructure, equipment and financing.
7. TeraWulf's Shift From Bitcoin Mining to AI Infrastructure
TeraWulf began as a bitcoin miner, a business that converts electricity into digital assets by running specialized computers. Over time the company has moved increasingly toward supplying power and infrastructure to AI companies, whose demand for data center capacity has grown rapidly. The Anthropic agreement is one of the largest contracts in that shift.
The logic of the transition is straightforward. Bitcoin miners already control sites with large power connections, which are hard to obtain. AI developers need exactly those assets, and they are willing to sign long leases at scale. A 20-year commitment worth $19 billion gives TeraWulf a revenue stream that is far more predictable than mining income, which rises and falls with the price of bitcoin and the network's difficulty.
The Google backstop adds to that predictability. It reduces the chance that a tenant default would leave TeraWulf holding a half-empty campus built for a single customer, and it signals to the market that one of the world's largest technology companies is prepared to stand behind the deal.
8. What Should Investors Watch Next?
The first milestones are physical. Delivery of capacity is slated to begin in late 2027 and run through the second quarter of 2028, and Google's support for each of the three leased sections starts only when the last data hall in that section is handed over. Investors can track construction progress against those dates.
The second is Anthropic's credit standing. If the company or its parent obtains an investment-grade rating and holds it for three months, Google's obligations end, which would remove the backstop and the possibility of a Google ownership stake. Until then, the step-in rights remain part of the structure.
Finally, the financing that the guarantee was designed to enable is worth following. TeraWulf has said the arrangement supports project financing, and the terms of any debt raised against the Kentucky campus will show how much value lenders assign to Google's commitment. The disclosure in the SEC filing is the first detailed look at how that protection is built.
Taken together, these checkpoints mean the TeraWulf Anthropic lease will remain a story of construction progress, creditworthiness and financing terms through 2028, with Google's contingent rights sitting in the background as a safeguard that all parties hope never to use.