Google backs TeraWulf’s $19 billion Anthropic lease with credit support

TeraWulf built its business mining bitcoin, then began converting capacity at sites like Lake Mariner and now Hawesville, Kentucky into hosting for AI compute, following peers such as Core Scientific and Cipher Mining into the same pivot. Anthropic, needing large-scale compute outside its own balance sheet, became the anchor tenant for a $19 billion lease. Google, which has previously taken equity and warrant positions in miners turning into data-center operators, is now the credit backstop behind the deal.

With Google's AA+ rating standing behind the lease and a third TeraWulf campus, lenders can price debt closer to Google's own cost of capital rather than a bitcoin miner's. That lets TeraWulf raise financing for construction it could not otherwise access on these terms, and lets Anthropic lock in compute without building or owning the data centers itself. Bitcoin-focused shareholders inherit a company whose financial profile now hinges on AI tenant performance, not hashrate.

Google's credit support comes with a right to take a stake in the project if Anthropic defaults, meaning a company that also backs Anthropic is effectively insuring against its own portfolio company's failure while gaining upside in the physical infrastructure either way. It is a reminder that 'AI infrastructure' financing increasingly runs through a handful of hyperscaler balance sheets, with miners supplying sites and credit risk concentrating upstream at Google regardless of how the lease performs.

The near-term marker is delivery at the Justified campus in Hawesville and whether TeraWulf discloses the specific default and conversion terms attached to Google's guarantee in its SEC filings. Completion on schedule would validate the credit-enhancement model for other miners seeking AI tenants; any renegotiation or delay would test how far Google's backing actually protects lenders versus simply shifting risk onto Google's own books.