TL;DR · 30-second read

The Short Version

• Lenders got nervous this week about companies borrowing heavily to build data centers for artificial intelligence.
• Investors now demand about 16.5 percent a year to hold bonds, essentially IOUs, from CoreWeave, a company that rents out computing power for artificial intelligence.
• Rivals whose loans are backed by actual buildings and long rental contracts with big tech firms pay roughly half that.
• That split matters: how cheaply a builder can borrow may now decide how fast these giant computer warehouses get built.

Bonds issued by AI data center companies fell to fresh lows this week, PitchBook reported in an article republished by Morningstar on October 16. CoreWeave’s unsecured notes took the heaviest losses: its 9.75% senior notes due 2031 traded as low as 78 cents on the dollar on October 14, a 16.39% yield, after starting October near 85, while its $1.25 billion of 9.625% notes due 2032 fell to 75, a 16.5% yield, down from 103.625 on June 2. The two issues recovered to 83 and 80, respectively, on October 15.

The trigger was Cipher Digital’s plan for a private offering of $850 million in zero-coupon convertible senior notes due 2032, with an option for initial buyers to take up to $150 million more. JPMorgan analysts then cut Applied Digital’s project finance bonds to Neutral from Overweight, citing a “supply overhang” as the company prepares to borrow billions more; Wall Street analysts estimate it may need another $8 billion in secured project debt. Applied Digital’s $1.59 billion of 7% senior secured notes due 2031 slipped to 94.5, a yield of about 8.44%.

Executive Summary

Data center bonds sank to new lows this week, and the selloff hit CoreWeave hardest, with its unsecured notes trading at yields above 16%. Cipher Digital’s planned $850 million zero-coupon convertible offering revived investor concern that AI infrastructure companies will need to borrow more than the market can comfortably absorb. Reuters framed the rout as a test of the market’s math on the AI buildout.

The more telling detail is how uneven the damage was. Secured notes from Applied Digital, Cipher and CleanSpark, which give lenders a claim on specific assets, fell about a point or less and yielded roughly 7.17% to 8.44%. CoreWeave’s unsecured paper fell several points in days and nearly 29 points on one issue since June. The market is now pricing AI data center debt in two distinct tiers.

For developers, hyperscalers and investors, the cost of financing the next building increasingly depends on the structure of the debt, the quality of the tenant behind it, and how much similar debt is coming to market at the same time. That makes credit terms a pacing factor, alongside power and equipment, in how quickly debt-funded AI capacity gets built.

Two Price Tiers for the Same Buildout

The clearest signal in this week’s trading is not that data center bonds fell, but how unevenly they fell. CoreWeave’s unsecured notes, debt backed only by the company’s general promise to pay, hit yields of 16.39% and 16.5% at their lows. Over the same stretch, secured notes from three other AI data center builders traded far tighter: Cipher Digital’s 7.125% senior secured notes due 2030 at roughly 7.17%, CleanSpark’s 7.875% senior secured green notes at 8.18%, and Applied Digital’s 7% senior secured notes due 2031 at about 8.44%. That is a gap of roughly eight to nine percentage points between companies financing the same kind of infrastructure.

The price moves tell the same story. CoreWeave’s 9.625% notes due 2032 have fallen nearly 29 points since June 2, from 103.625 to a low of 75, and its 9.75% notes due 2031 lost about 7 points in the first two weeks of October. Cipher’s and CleanSpark’s secured bonds each gave up 0.75 points on the news; Applied Digital’s fell 1.125 points. A bond’s price and yield move in opposite directions: a buyer paying $75 for a note that repays $100 collects the coupon plus the $25 discount, which lifts the effective annual return well above the stated interest rate.

The mechanism is collateral. A secured noteholder has a claim on specific assets, such as buildings, equipment and the leases that generate rent, if the borrower fails; an unsecured holder stands in line with other general creditors. Part of CoreWeave’s spread reflects company-specific concern about servicing a large debt load, so structure alone does not explain the whole gap. But any developer deciding how to fund its next building now faces two very different quoted prices for capital, and the unsecured one is roughly double.

What Buys the Lower Rate: Contracts, Collateral, Completed Megawatts

Applied Digital’s October 7 results release, filed with an 8-K, shows what lenders are paying for in the cheaper tier. The company signed a 210-megawatt, 15-year lease at its Delta Forge 2 campus with what it describes as a tier-one, investment-grade hyperscaler, one of the very large cloud and internet companies, representing about $5.2 billion of base-term contracted revenue. In June it closed $1.59 billion of 7% senior secured notes at par through subsidiary APLD ComputeCo 3 LLC to fund a 150-megawatt third building at its Polaris Forge 1 campus and repay a $300 million bridge loan. Megawatts here measure the electrical load the computing equipment draws, the industry’s standard unit of data center size.

The company is also delivering capacity. On October 1 it brought the second 75 MW phase of Building 2 at Polaris Forge 1 online, taking the campus to 250 MW of fully operational load across two buildings and 10 data halls, and it expects 300 MW across its North Dakota campuses by the end of calendar 2026. Fiscal first-quarter revenue reached $341.9 million, up 322% year over year, alongside a $221.0 million net loss attributable to common stockholders and adjusted EBITDA (earnings before interest, taxes, depreciation and amortization) of $64.4 million, a non-GAAP figure that excludes majority-owned ChronoScale. Secured project lenders lean primarily on the specific asset and its tenant rather than on that consolidated income statement.

Even this tier is not immune. Applied Digital’s 7% notes have slid from around 99 in early August to 94.5. JPMorgan’s downgrade did not question the leases; it cited a looming supply overhang, meaning the expectation of a large volume of similar new debt. Analysts’ estimate of roughly $8 billion in additional secured project borrowing is the point: when buyers expect a wave of new bonds, existing ones tend to cheapen so the new issues can clear. The cheaper tier’s price depends on how much of it the industry tries to sell at once.

Cipher’s Convertible Shifts the Bill to Shareholders

Cipher Digital’s financing shows the other route around expensive unsecured debt. A zero-coupon convertible pays no regular cash interest; instead, holders can convert the notes into shares under set terms. The company preserves cash, but the cost shifts to existing shareholders through potential dilution. Cipher also plans to exchange part of its 1.75% convertible notes due 2030 for common stock, and it pledged part of the proceeds to capped call transactions, a hedge meant to reduce dilution if the shares rise.

Equity investors were not reassured. The stock fell to a six-month low, and Morgan Stanley trimmed its price target to $51.50 from $54.00 while keeping an Overweight rating. Cipher’s secured bondholders, by contrast, barely reacted, with the 7.125% notes due 2030 slipping 0.75 points to 99.875. The pattern is consistent with the two-tier reading: creditors with collateral absorbed little of the shock, while shareholders and unsecured lenders carried most of it. Convertibles are a release valve for builders, but the share-price response shows that valve has a price of its own.

Is Credit Now the Pacing Item?

The pipelines that need funding are large. Beyond its North Dakota campuses, Applied Digital has secured up to about 1 gigawatt of potential power capacity in Finland and signed a power purchase agreement for capacity and energy from an approximately 1,200 MW natural gas plant that Base Electron is to develop in North Dakota. Projects like these require capital well before rent arrives, and a project that works financially at an 8% cost of debt can look very different at 16%.

The evidence supports a narrower conclusion than “credit is closing.” The market remains open: CleanSpark priced $2.276 billion of secured notes last month, Applied Digital closed $1.59 billion at par in June, and Cipher is launching an $850 million offering now. What has changed is selectivity. Lenders are discriminating by collateral, by contracted tenant, and by the volume of issuance in the pipeline. Sentiment also tracks end demand: good news from Meta, a CleanSpark client, including early third-party retention data for its Muse assistant, helped limit CleanSpark’s bond losses.

One week of trading is not a trend, and CoreWeave’s notes recovered several points on October 15. But the groups most exposed are clear: unsecured issuers, developers without signed investment-grade leases, and the hyperscalers that rely on third-party builders for capacity. Whether higher financing costs for the riskier tier pass through to lease rates, slow delivery schedules, or push more borrowers into secured project structures is the question to watch over the coming quarters.

Background

Over the past few years, a group of companies has emerged to build and rent out the specialized data centers that AI systems require. CoreWeave is a so-called neocloud, a cloud provider focused on renting out AI computing capacity. Cipher Digital, a former bitcoin miner, and CleanSpark, a bitcoin miner accelerating its transition toward AI data center buildouts, are repositioning toward high-performance computing (HPC) and AI hosting. Applied Digital designs, builds and operates large purpose-built campuses centered on North Dakota, and it consolidates ChronoScale, a majority-owned public company running its historic cloud business, which has announced plans with Microsoft for a 50 MW AI compute deployment.

Much of this buildout is financed with debt, including unsecured corporate bonds, secured project notes tied to specific campuses, and convertible notes, which is repaid over years from rent or compute revenue. That makes the bond market a direct input into how much AI capacity gets built and how quickly, and it is why moves in these companies’ bond prices are closely watched by developers, tenants and investors alike.

Sources

Source: CoreWeave and Data Center Bonds Slide on Capex and Debt Overhang Concerns (Morningstar, originally published by PitchBook), on this week’s selloff in CoreWeave and data center developer bonds. See also Reuters, CoreWeave bond rout tests market’s math on AI buildout.

Primary sources: Applied Digital Reports Fiscal First Quarter 2027 Results (Exhibit 99.1 to Form 8-K, October 7, 2026); Applied Digital Form 8-K, filed October 7, 2026; Applied Digital Form 10-Q for the quarter ended August 31, 2026, filed October 7, 2026.

TL;DR · 30-second read

The Short Version

CleanSpark, a company best known for mining bitcoin, is borrowing about $2.3 billion to finish a huge building full of computers for artificial intelligence. The tenant is a company owned by Meta, the parent of Facebook and Instagram, and Meta itself guarantees 20 years of rent.

Even with that promise, lenders are charging nearly 8% interest, or about $179 million a year.

Why so expensive? The building is not scheduled to start paying rent until late 2027, and lenders are betting it gets finished. That interest rate shows what it costs a bitcoin company to become a landlord for artificial intelligence.

On September 18, 2026, CleanSpark (Nasdaq: CLSK) said in an 8-K that its wholly owned subsidiary CSDC Finance I, LLC had priced $2.276 billion of 7.875% senior secured notes due 2031 at 98.5% of face value. The deal is expected to close on September 25. It is larger than the $2.227 billion CleanSpark proposed a day earlier. The notes were sold privately to large institutional investors under Rule 144A and to non-U.S. buyers under Regulation S.

The proceeds will finish building CleanSpark’s Sandersville Facility, reimburse the company for equity it has already put into the project, and fund debt service reserves. The investor presentation CleanSpark furnished on September 17 describes Sandersville as a 175 MW AI data center campus. It is leased for 20 years to Anviran, LLC, a wholly owned Meta subsidiary, and Meta guarantees the rent and operating expenses. First-phase rent is targeted for Q4 2027.

Executive Summary

CleanSpark has raised project-level debt for its first large AI hosting campus, and the price is specific: a 7.875% coupon, sold at a 1.5-point discount. The notes are secured by first-priority liens on the Sandersville project and the issuer’s equity, a completion guarantee from CleanSpark backs them, and part of the proceeds funds cash reserves for interest payments. Behind all of that sits a 20-year triple-net lease guaranteed by Meta, a company the presentation values at about $1.7 trillion.

The notable feature is the gap between the tenant and the terms. Meta’s credit is not in question. The coupon and the protective package reflect what is still unfinished: a building that is not scheduled to earn rent until late 2027, owned by a sponsor that is moving from bitcoin mining into data center development. For operators trying to turn mining power into AI capacity, this deal is a concrete, disclosed reference point for what that conversion costs to finance.

Meta Signed the Lease. Lenders Still Priced the Build.

On paper, Sandersville is about as strong a credit story as a data center gets. The investor presentation CleanSpark furnished on September 17 describes these terms:

• a 20-year base lease with Anviran, LLC, a Meta subsidiary, plus two five-year extension options;
• Meta itself as guarantor of rent and operating expenses;
• a triple-net structure, meaning the tenant covers taxes, insurance and upkeep;
• a 3% annual rent escalator;
• about $6.6 billion of base-term contract value.

To underline the tenant’s strength, the presentation cites Meta’s $117 billion of first-half 2026 revenue.

Even so, the notes carry a 7.875% coupon, the fixed annual interest rate. They were also sold at 98.5 cents on the dollar, which by rough estimate lifts investors’ effective yield to a little over 8%. Bondholders also received three protections. They hold first-priority liens on substantially all assets of the issuer and its guarantor subsidiary, plus the issuer’s equity. Reserves funded from the proceeds cover debt service. And CleanSpark gives a completion guarantee, a promise to supply more money if the proceeds cannot finish the facility on time. Each protection guards against the same thing. The question is not whether Meta can pay. It is whether the building gets delivered.

The timeline explains why. First-phase rent is targeted for Q4 2027, so interest accrues for more than a year before rent arrives, and the lease pays only once the capacity exists. For a bitcoin miner moving into AI hosting, a lease with a hyperscaler (one of the giant cloud and internet platforms) turns megawatts into something lenders will finance. It does not, on its own, earn the borrowing costs of the investment-grade tenant. Construction and sponsor risk sit in between. In this deal, CleanSpark carries the construction risk directly through its guarantee.

The Per-Megawatt Math Behind $2.276 Billion

The presentation puts development cost at about $11.9 million per megawatt of critical IT load, which is the power delivered to the servers themselves, not counting cooling and building overhead. For 175 MW, that implies roughly $2.1 billion. At 98.5% of face value, $2.276 billion of notes raises about $2.24 billion before fees, which is more than that implied total cost. That fits the stated uses: finishing the build, reimbursing CleanSpark’s prior equity contributions, and funding reserves. In practice, the debt is sized to fund close to the whole project, and CleanSpark recovers part of what it has already spent.

Annual interest on the notes comes to about $179 million, or roughly $1.0 million per megawatt per year. Net operating income (NOI) is rent minus operating expenses, and under a triple-net lease it is nearly all of the rent. CleanSpark projects average NOI of about $330 million a year, or roughly $1.9 million per megawatt. That covers interest about 1.8 times on average. The early years are thinner. The presentation’s schedule shows NOI of about $220 million in 2028, the first full rent year, which covers interest about 1.2 times, before the escalator widens the margin.

The resizing is worth noticing. CleanSpark proposed $2.227 billion on September 17 and priced $2.276 billion the next day. At the 98.5% price, the larger deal raises slightly more than the original principal target. The extra $49 million of face value more than offsets the discount. CleanSpark has not said why it changed the size. Either way, the issuer now pays 7.875% on the larger amount.

What 7.875% Means for Miners Sitting on Megawatts

CleanSpark says it controls more than 1.8 GW of power, land and data centers. Sandersville’s 175 MW of IT load is less than a tenth of that figure. The comparison is only rough, because IT megawatts and grid megawatts are measured differently. The company’s own forward-looking disclaimers list the risks of converting mining sites into data centers: permitting and utility constraints, construction delays, cost overruns, financing, supply chains and tenant performance. Sandersville is where that list first meets billions of dollars of committed capital.

The 2031 maturity matters as much as the coupon. The notes come due about four years after targeted rent start, while the lease runs 20 years. If the campus is delivered and paying rent by then, the construction risk that shaped this coupon will be gone, which could support cheaper refinancing. That outcome still depends on rates and credit markets in 2031. The refinancing risk moves to a later date; it does not disappear.

For other miners pursuing the same path, this is one data point, not a trend. It shows that an investment-grade lease plus secured, project-level debt can fund a full AI build, at this price and with the parent still responsible for completion. Three groups are affected. CleanSpark shareholders get part of their equity back but take on a contingent obligation. Noteholders hold a claim on a single asset. Other operators now have a public benchmark that their own conversions will be compared against.

Background

CleanSpark, based in Las Vegas and listed on Nasdaq as CLSK, built its business on bitcoin mining. It now describes itself as a data center developer that controls more than 1.8 GW of power, land and data centers across the United States. Its investor materials describe an evolving strategy: expanding into data center development, high-performance computing and AI, including by converting some of its bitcoin mining sites into data centers for other uses.

The move follows a wider pattern. Bitcoin miners hold what AI developers most need: land with large grid connections already in place. Turning a mining site into an AI data center, however, takes a different class of building, with heavier cooling, redundant power and stricter uptime requirements. It also takes financing on a different scale. That is why Sandersville’s financing terms draw attention well beyond CleanSpark itself.

Sources

Source: Is CleanSpark (CLSK) Undervalued On Its New 7.875% Notes And Expansion Plans? (Yahoo Finance), coverage of CleanSpark’s new senior secured notes and data center expansion.

Primary sources: CleanSpark Form 8-K filed September 18, 2026; CleanSpark, Inc. Announces Pricing of $2.276 Billion of Senior Secured Notes (Exhibit 99.1); CleanSpark Form 8-K filed September 17, 2026; Sandersville Investor Presentation, September 2026 (Exhibit 99.1); CleanSpark, Inc. Announces Proposed Offering of $2.227 Billion of Senior Secured Notes (Exhibit 99.2).

TL;DR · 30-second read

The Short Version

Hut 8, a company that used to make most of its money mining bitcoin, has reportedly signed a $9.8 billion, 15-year deal to rent out a giant Texas building complex for artificial intelligence computers.

The surprise is the price. Measured per unit of electricity, it pays about the same as a similar deal a rival, CleanSpark, signed with Facebook’s parent company Meta.

If landlords like these all charge roughly the same rent, the winners will be whoever builds cheapest and borrows cheapest. That matters for the investors, towns and power grids hosting them.

StocksToTrade reported on September 18, 2026 that Hut 8 Corp. (Nasdaq: HUT) has signed a second 15-year lease worth about $9.8 billion for 352 megawatts (MW) of IT capacity at Beacon Point, its 1-gigawatt AI data center campus in Texas, with an investment-grade tenant. The lease fully commercializes the campus, doubles contracted capacity there to 704 MW and brings Hut 8’s contracted IT capacity across two campuses to 949 MW. The same report said Wells Fargo initiated coverage with an Overweight rating and a $175 price target, and that the shares rose 8.15% on the day.

The deal lands the same week CleanSpark priced $2.276 billion of 7.875% senior secured notes due 2031 to finish its Sandersville, Georgia campus, a 175 MW facility leased to a wholly owned Meta subsidiary, according to CleanSpark’s 8-K filings of September 17 and 18.

Executive Summary

Hut 8’s second Beacon Point lease is, at $9.8 billion, one of the largest contracts yet signed by a former bitcoin miner converting power and land into AI data center capacity. Its significance is less the headline total than what it implies about price: spread over 15 years and 352 MW, the lease works out to roughly $1.86 million per megawatt per year, almost exactly the rate implied by CleanSpark’s Meta-guaranteed Sandersville lease.

If long-term AI capacity from miners is clearing at a similar rent per megawatt, the lever that separates one landlord’s returns from another’s shifts from pricing to cost: what it takes to build each megawatt, and what it costs to borrow the money. CleanSpark’s filings put numbers on both for Sandersville, roughly $11.9 million of development cost per IT megawatt financed with 7.875% secured notes, which gives the industry a public benchmark against which Hut 8’s still-undisclosed build and financing terms will be judged.

Two Leases, One Price per Megawatt

Data center leases for AI are usually quoted by total contract value, which makes deals of different sizes and lengths hard to compare. Normalising them to dollars per megawatt of IT capacity per year (a megawatt is roughly enough power for several hundred homes; IT capacity is the power available to the servers themselves, excluding cooling and other overhead) puts them on the same footing.

Hut 8’s lease, at $9.8 billion over 15 years, implies about $653 million a year; divided across 352 MW, that is about $1.86 million per megawatt-year. CleanSpark’s September 17 investor presentation, filed as an exhibit to its 8-K, describes Sandersville as 175 MW of critical IT load under a 20-year base term with about $6.6 billion of contracted base-term value and about $330 million of average annual net operating income on a triple-net basis. That is about $1.89 million per megawatt-year. The two figures are within roughly 2% of each other.

Two leases do not make a market index, and the comparison has limits: CleanSpark discloses a 3% annual rent escalator, while Hut 8’s escalator, if any, has not been published, and both totals are nominal. Still, two investment-grade AI tenants contracting miner-built capacity at near-identical unit rents in the same month is a useful signal. It suggests tenants are paying for megawatts of ready capacity at something close to a going rate, rather than awarding premium pricing to any one developer.

When Rent Is Fixed, Capital Cost Is the Margin

Once rent per megawatt is set by the market, a landlord’s return is determined by what sits underneath it. CleanSpark’s presentation gives a rare public breakdown: about $11.9 million of development cost per IT megawatt, which at roughly $1.89 million of annual net operating income per megawatt implies a yield on cost of around 16% before financing. It then priced its notes at 98.5% of face value with a 7.875% coupon, so the effective borrowing cost is slightly above the coupon. The spread between those two figures is the project’s economic engine.

That arithmetic shows why build cost matters so much at a fixed rent. At the same $1.86 million per megawatt-year, every extra $1 million of build cost per megawatt lowers yield on cost by more than a percentage point, and across 352 MW it adds about $352 million of capital to be raised. Term length matters too: Hut 8’s 15-year term gives it five fewer years of contracted rent than CleanSpark’s 20-year base term to recover a comparable investment, making renewal options and the facility’s residual value more important to its returns.

Hut 8 starts from a leveraged position. StocksToTrade’s report cited roughly $7.4 billion of long-term debt, trailing revenue of about $235.1 million and a recent quarterly net loss of about $150.2 million. Contracted rent from an investment-grade tenant is exactly the collateral lenders want for project-level bonds like CleanSpark’s, but the price Hut 8 pays for that money, and the build cost it must fund, will determine whether the Beacon Point rent translates into margin.

From Mining Sites to Contracted Backlog

The broader shift is that bitcoin miners’ most valuable asset has turned out to be their grid connections and land, not their mining machines. Power interconnections for large loads can take years to secure, and miners already hold them. Hut 8 reports 949 MW of contracted IT capacity across two campuses, which by subtraction leaves 245 MW at the campus outside Beacon Point. CleanSpark says it controls about 1.8 GW of power, land and data centers across the United States.

For AI tenants and the cloud providers serving them, this cohort widens the pool of sites that can be delivered faster than a greenfield project. For the miners, long-term leases replace revenue tied to bitcoin prices with contracted rent from creditworthy counterparties, which is why an analyst like Wells Fargo can point to backlog and tenant quality rather than coin prices. StocksToTrade also linked Hut 8 to hosting hardware for Anthropic’s reported $35 billion compute arrangement with Lambda; Hut 8 has not published the terms of that role.

Execution Risk Moves to Power, Permits and Delivery Dates

Contracted rent only turns into cash once a facility is energised and handed over. CleanSpark targets initial rent commencement at Sandersville in Q4 2027 and has promised a completion guarantee to fund any shortfall if note proceeds prove insufficient, which shows how much of the risk remains with the developer until delivery. A 1-gigawatt campus in Texas carries the same exposure at larger scale: power delivery, equipment lead times for transformers and switchgear, and construction labour all have to line up on schedule.

Policy is a further variable. The StocksToTrade report noted a Massachusetts executive order requiring community approval, stricter environmental rules and clean energy or payments into a protection fund for new data centers. Hut 8’s growth is in Texas, but states are increasingly attaching conditions to large AI loads, and those conditions add cost to developers whose rent is already fixed for 15 or 20 years.

Background

Hut 8 Corp., listed on Nasdaq as HUT, built its business on bitcoin mining and has been repositioning its power and land portfolio toward AI data centers. Beacon Point, its 1-gigawatt campus in Texas, is now fully leased across two 15-year contracts, and the company counts 949 MW of contracted IT capacity across two campuses.

Hut 8 is part of a wider group of public miners converting their sites into AI capacity. CleanSpark, which describes itself as a data center developer controlling more than 1.8 GW of power, land and data centers, is building its 175 MW Sandersville campus in Georgia for a Meta subsidiary and financing it with $2.276 billion of project-level secured notes. Both companies are betting that grid-connected sites, not mining machines, are their most valuable assets.

Sources

Source: HUT Stock Powers Higher On $9.8B AI Data Center Deal And Bullish Wall Street Call (StocksToTrade), reporting Hut 8’s second Beacon Point lease, contracted capacity and Wells Fargo’s coverage initiation.

Primary sources: CleanSpark 8-K filed 2026-09-18; CleanSpark, Inc. Announces Pricing of $2.276 Billion of Senior Secured Notes (Exhibit 99.1, 2026-09-18); CleanSpark 8-K filed 2026-09-17; Sandersville Investor Presentation, September 2026 (Exhibit 99.1, 2026-09-17); CleanSpark, Inc. Announces Proposed Offering of $2.227 Billion of Senior Secured Notes (Exhibit 99.2, 2026-09-17).

TL;DR · 30-second read

The Short Version

CleanSpark, a company best known for mining bitcoin, wants to borrow about $2.2 billion to finish a huge building full of computers for artificial intelligence in Sandersville, Georgia.

Meta, the owner of Facebook and Instagram, has agreed to rent the building for 20 years and has promised the rent will be paid. That promise, not bitcoin, is what lenders are really betting on.

The site is due to start earning rent in late 2027. Its computers are built to use as much electricity as well over 100,000 homes.

On September 17, 2026, CleanSpark (Nasdaq: CLSK) said in an 8-K filing and accompanying press release that its wholly owned subsidiary CSDC Finance I, LLC intends to offer $2.227 billion of senior secured notes due 2031. The notes will be sold privately to large institutional investors under Rule 144A and to non-US investors under Regulation S. Proceeds will pay the remaining build-out cost of CleanSpark’s Sandersville, Georgia data center, reimburse CleanSpark for earlier equity it put into the project, and fund debt service reserves. The offering is subject to market conditions, and the interest rate has not yet been set.

An investor presentation filed with the 8-K describes Sandersville as a 175-megawatt AI campus leased for 20 years to Anviran, LLC, a Meta subsidiary, with Meta guaranteeing rent and operating expenses. Several financial outlets characterized the deal as a junk, or high-yield, bond. Blockonomi reported that CleanSpark shares rose 4.73% on Thursday to close near $13.40.

Executive Summary

CleanSpark is raising $2.227 billion of debt against one building, not against the company. The notes sit in a special-purpose subsidiary, are secured by first-priority liens on that subsidiary’s assets and the Sandersville property company, and are backed by a 20-year lease whose rent Meta guarantees. According to the investor presentation, the lease carries about $6.6 billion of base-term contract value, a 3% annual rent escalator and roughly $330 million of average annual net operating income (rent left after operating costs).

That structure matters because it lets a company whose core business is mining bitcoin borrow on the strength of a trillion-dollar tenant’s promise to pay rent. It also shows where the risk actually sits: before rent begins, which is targeted for the fourth quarter of 2027, lenders are exposed to construction, and CleanSpark’s completion guarantee is the backstop. After that, the main question becomes refinancing the notes in 2031, well before the lease ends.

For the wider AI infrastructure market, the deal is a working example of how a miner with power and land can turn a signed hyperscale lease (a lease with one of the giant cloud and AI companies) into construction financing without issuing new shares.

The Collateral Is Meta’s Rent Check, Not Bitcoin

Read the 8-K and its exhibits together and the credit story is clear: bondholders are lending against a lease. The issuer, CSDC Finance I, is a ring-fenced subsidiary. The notes are guaranteed by CSRE Properties Sandersville, which holds the facility, and secured by first-priority liens on substantially all assets of both entities plus a pledge of the issuer’s equity held by its parent, CSDC Holdings I. The tenant, Anviran, LLC, is a wholly owned Meta subsidiary, and the investor presentation names Meta as guarantor of both rent and operating expenses. The lease is described as roughly 100% triple-net, meaning the tenant bears the building’s operating costs, so almost all rent flows through to the landlord.

The numbers line up with that reading. The $2.227 billion of notes equals about a third of the roughly $6.6 billion of base-term contract value, and a little under seven times the roughly $330 million of average annual net operating income CleanSpark projects. Bitcoin’s price, mining difficulty and the halving cycle, which dominate CleanSpark’s mining economics, do not appear in that rent stream. For a high-yield investor, the relevant credit once the building is operating is Meta’s, which the presentation frames with a roughly $1.7 trillion market capitalization and $117 billion of first-half 2026 revenue.

That is the sense in which the bond rests on the lease rather than the miner. It is an inference from the structure, not a rating: the filings disclose no credit rating or coupon, and those will determine how much credit investors actually give the Meta guarantee.

The Risk Lenders Still Carry: Getting to Rent Day

A lease guarantee only pays once there is something to lease. The presentation targets Phase I rent commencement in the fourth quarter of 2027, and its own cash-flow schedule shows negligible income before 2028. Until then, bondholders are exposed to exactly the risks the presentation lists: permitting and utility constraints, construction delays, cost overruns and supply-chain problems. The proceeds include debt service reserves, which cover interest payments during that gap.

The backstop for construction is CleanSpark itself. The company will provide a customary completion guarantee, meaning it must fund the project if the note proceeds run short. During construction, then, the parent’s financial strength, which still depends heavily on bitcoin mining, matters to bondholders. The presentation cites a development cost of about $11.9 million per IT megawatt, which implies roughly $2.08 billion for 175 megawatts. The notes are sized above that because they also reimburse CleanSpark’s prior equity and fund reserves, so if the deal completes on these terms, much of the project’s cost ends up financed by debt and some of CleanSpark’s own cash comes back to the parent.

A 2031 Maturity on a 20-Year Lease

The notes mature in 2031, a little over three years after targeted rent commencement, while the base lease runs 20 years with two five-year extension options. That mismatch is common in construction-stage project financing: borrow while the asset is unproven, then refinance once it is built and paying rent. The trade-off is that CleanSpark will need to refinance about $2.2 billion around 2031, with interest rates and credit conditions at that time unknown.

A stabilized, fully leased facility with roughly 16 years of Meta-guaranteed rent remaining should be a much easier asset to refinance than a construction site. But how easy depends on the delivery date holding and on markets in 2031, neither of which the offering can lock in today.

A Template for Miners Turning Landlords

CleanSpark now describes itself as a “market-leading data center developer” controlling more than 1.8 gigawatts of power, land and data centers. Sandersville, at 175 megawatts, is a small slice of that. The structure matters more than the site: sign a lease with a highly rated tenant, ring-fence the project, borrow against the lease, and recover equity for the next site. Because the notes are straight secured debt rather than convertible securities, the announced terms involve no new shares.

One offering does not prove that high-yield markets will fund every miner’s move into AI. Few miners will bring a Meta-guaranteed lease to the table, and the pricing of this deal will show how much the tenant’s credit actually offsets the sponsor’s. For utilities, construction firms and other miners with power portfolios, the signal is narrower but concrete: the lease, not the megawatts, is what gets financed.

Background

CleanSpark, headquartered in Las Vegas, built its business mining bitcoin, using large amounts of cheap electricity to run specialized computers. It now calls itself a data center developer and says it controls more than 1.8 gigawatts of power, land and data centers across the United States. Blockonomi also reported that the company mined 593 bitcoin in August 2026 and held 13,703 bitcoin at month-end, so mining remains a large part of its business as it moves into AI hosting.

Bitcoin miners have become candidates for AI data center development because they already hold what AI builders most need: large grid connections and land zoned for industrial power use. Hyperscalers such as Meta, which reports 3.56 billion daily active people across its apps, increasingly lease that capacity instead of building every site themselves, creating long-term leases that developers can finance.

Sources

Source: CleanSpark (CLSK) Stock Surges 5% on $2.2B Debt Offering for Georgia Data Center (Blockonomi) — coverage of CleanSpark’s proposed $2.227 billion notes offering for its Sandersville, Georgia data center.

Primary sources: CleanSpark, Inc. Form 8-K filed September 17, 2026 (SEC EDGAR); Exhibit 99.1: Sandersville Investor Presentation, September 2026; Exhibit 99.2: CleanSpark, Inc. Announces Proposed Offering of $2.227 Billion of Senior Secured Notes.