What is a data center lease backed bond? A data center lease backed bond is project level debt secured by a single building and repaid almost entirely from the contracted rent of one creditworthy tenant, rather than from the cash flow of the company that built it. On September 17, 2026, CleanSpark (Nasdaq: CLSK) put that structure in front of the high yield market, announcing that subsidiary CSDC Finance I, LLC intends to sell $2.227 billion of senior secured notes due 2031 backed by a 20-year triple net lease to a Meta Platforms subsidiary. For the broader framework, see our guide to AI CRE finance and capital markets.
Key Takeaways
- CleanSpark is raising $2.227 billion of senior secured notes due 2031 through subsidiary CSDC Finance I, repaid by rent from a single 175 MW data center campus in Sandersville, Georgia.
- The tenant is Anviran, LLC, a wholly owned Meta Platforms subsidiary, on a 20-year triple net lease with a 3% annual escalator and roughly $6.6 billion of contracted base term payments.
- Meta guarantees rent and operating expenses, converting a junk rated sponsor's construction project into what functions like a credit tenant lease financing.
- CleanSpark models roughly $330 million of average annual net operating income and an illustrative 1.275x debt service coverage ratio once amortization begins.
- Bloomberg data indicates this is the first high yield bond tied to a Meta data center, making it a template other landlords will copy rather than a one off.
- The real risk is not occupancy but construction completion, since rent does not begin until November 30, 2027.
What CleanSpark Actually Sold to the Bond Market
CleanSpark sold bondholders a lease, not a company. The notes are issued by CSDC Finance I, LLC, guaranteed by property subsidiary CSRE Properties Sandersville, LLC, and secured by first priority liens on substantially all assets of both entities. Proceeds fund the remaining build out, reimburse CleanSpark for equity already contributed, and fund debt service reserves. The offering was made under Rule 144A and Regulation S, with Morgan Stanley leading and Goldman Sachs and Wells Fargo also underwriting, according to Bloomberg.
The disclosure that moved the story was the tenant. CleanSpark announced the lease on July 14, 2026 and described the counterparty only as a high investment grade global technology company. The September 17 investor presentation named it: Anviran, LLC, a wholly owned Meta Platforms subsidiary, with Meta guaranteeing rent and operating expenses. That single line is what lets a former bitcoin miner with a junk credit profile borrow $2.227 billion against a building that produces no rent until late 2027.
The economics disclosed are unusually specific for a data center deal. The lease covers 175 MW of critical IT load on a 20-year base term with two five year extension options, carries a 3% annual rent escalator, and is expected to produce approximately $6.6 billion of base term payments and roughly $330 million of average annual net operating income. Rent commences November 30, 2027, with construction completion targeted around March 2028.
The Lease Math CRE Investors Should Run
Strip away the AI framing and this is a net lease underwriting problem you already know how to solve. Run four numbers. First, initial rent: $6.6 billion spread over 20 years with a 3% escalator implies a first year rent of roughly $246 million, not the $330 million average, because that average is inflated by two decades of escalation. Underwrite the front, not the mean.
Second, yield on cost. CleanSpark has guided to a landlord build cost of $10 million to $12 million per MW of critical IT load, putting Sandersville at roughly $1.75 billion to $2.1 billion. Against first year rent near $246 million, that is an initial yield on cost of roughly 12% to 14% by our estimate from the disclosed figures. Set that against single tenant net lease retail asking cap rates near 6.60% in Q2 2026 (Source: The Boulder Group) and you can see why capital is stampeding toward powered land.
Third, coverage. CleanSpark's illustrative schedule uses a 1.275x debt service coverage ratio once amortization starts, with lease support coverage near 2.6x to 2.9x in the early years. DSCR is net operating income divided by annual debt service, so 1.275x against early period rent implies annual debt service near $190 million. That is thinner than a $6.6 billion headline suggests.
Fourth, loan to cost. The $2.227 billion raise approximates the entire estimated landlord build cost, because it also reimburses equity CleanSpark already contributed and funds reserves. In plain CRE terms, the sponsor is pulling its equity back out at the construction financing stage on the strength of a signed lease. Our guide to AI credit tenant NNN deal scoring covers how to weigh that tenant credit versus structure tradeoff.
Why a Single Lease Junk Bond Is a Structural First
AI infrastructure debt so far has been either investment grade corporate paper from hyperscalers or pooled securitizations of stabilized portfolios. This deal is neither. It is single asset, pre completion, high yield, and repaid by one lease. According to data compiled by Bloomberg, it is the first junk bond offering tied to a Meta data center.
That matters for three reasons. It proves the high yield market will price 20-year hyperscaler lease risk before a building exists, pulling forward the financing timeline for every developer sitting on powered land. It sets a disclosure standard, because CleanSpark had to reveal the tenant, escalator, NOI, and coverage math to get the deal done. And it confirms the tenant guarantee, not the sponsor balance sheet, is now the pricing variable.
This is also distinct from the two other financing innovations of 2026. It is not tenant equity, where a hyperscaler takes warrants in its landlord, as in the OpenAI and SB Energy warrant arrangement. And it is not pooled issuance, which we covered in our analysis of AI data center debt securitization. It is old fashioned credit tenant lease financing wearing an AI jacket.
The Risks Buried in the Structure
Occupancy risk here is close to zero. Vacancy is not the exposure. Delivery is.
- Completion risk: Rent starts November 30, 2027, and CleanSpark must fund shortfalls under a completion guarantee if note proceeds fall short. Bondholders are lending into a construction site.
- Single tenant concentration: One lease, one guarantor, one campus. No diversification anywhere in the structure.
- Technology obsolescence: A 20-year term on a purpose built AI facility assumes rack density, cooling, and power needs that may not resemble 2036 workloads. Triple net does not solve residual obsolescence.
- Refinancing mismatch: The notes mature in 2031, well inside the 20-year lease. The takeout depends on 2031 capital markets, not on the lease.
- Execution risk today: As of publication the offering had not closed, and CleanSpark stated there is no assurance whether, when, or on what terms it may be completed.
CRE investors who want help stress testing structures like this can reach out to Avi Hacker, J.D. at The AI Consulting Network.
What This Means for Your Underwriting
The supply backdrop explains why lenders are willing. JLL reported North America data center absorption hit a record 25 GW in the first half of 2026, double the prior year, with vacancy sustained at 1% for a third consecutive year and 66 GW under construction that is 95% pre committed. CBRE put primary market vacancy at a record low 1.4%. With effectively no vacancy and near total preleasing, the credit question collapses into tenant quality and delivery certainty.
Three moves follow, even for investors who will never buy a 175 MW campus. Treat guarantor identity as a pricing input, not a diligence footnote. Model rent escalators explicitly instead of accepting average NOI figures, since the gap between $246 million and $330 million here is entirely escalation. And use AI document tools such as Claude, ChatGPT, or Gemini to extract lease terms, coverage ratios, and escalator language across a stack of offering memoranda in minutes. If you want that workflow installed rather than described, The AI Consulting Network builds exactly this.
Frequently Asked Questions
Q: What is CleanSpark financing with the $2.227 billion?
A: The notes fund the remaining build out of the 175 MW Sandersville, Georgia campus, reimburse CleanSpark for equity previously contributed, and fund debt service reserves. The debt sits at subsidiary CSDC Finance I, LLC, not at the parent level.
Q: Why does Meta being the tenant matter so much?
A: Meta Platforms guarantees rent and operating expenses through its subsidiary Anviran, LLC. That guarantee moves the credit question from a junk rated former bitcoin miner to an investment grade technology company, which is what makes a $2.227 billion raise against a single unbuilt asset feasible.
Q: How does DSCR work in a deal like this?
A: DSCR is net operating income divided by annual debt service, expressed as a ratio. CleanSpark's illustrative schedule shows 1.275x once amortization begins, meaning contracted rent covers debt service with roughly 27% of cushion. Anything above 1.0x means income covers debt.
Q: Should CRE investors expect more deals structured this way?
A: Most likely yes. With data center vacancy near 1% and most of the construction pipeline preleased to investment grade tenants, developers holding powered land now have a demonstrated path to project level high yield financing before delivery. Expect this disclosure package to become the market comparable.