Data centre ABS: follow the pool and the waterfall

Define the securitised perimeter

Identify the issuing entity, asset owners, leases and contracts contributing cash. Determine what is excluded and whether assets can enter or leave the pool. A platform-wide operating presentation may cover more sites than the securitisation. Reconcile the financed perimeter before comparing occupancy, customer concentration or cash generation.

Separate the payment modes

Trace normal payments, trapped-cash periods and rapid amortisation separately. Record which expenses rank ahead of interest and principal, and what happens to distributions after a trigger. A reserve can bridge a temporary shortfall, but it does not correct an uneconomic lease or permanently replace a lost customer.

Distinguish expected and final repayment

An anticipated repayment date may precede legal final maturity. Establish any step-up, cash sweep or other consequence after the expected date. Test the refinance balance and available cash then; do not present the legal tail as a committed refinancing. Notes issued in different classes may have different priorities and rate exposures.

Use public examples within their limits

Aligned and Yondr disclose securitisation transactions in the register. These announcements support selected transaction facts, not a reconstructed investor waterfall. Before using a trigger level or debt-service threshold as market evidence, obtain the actual definition, dated test and affected tranche. Missing legal terms remain missing rather than defaulting to a standard structure.

Why owners securitise

• Cost. Senior notes are typically rated A- (sf), which prices well inside bank or high-yield debt for the same assets.
• Recycling capital. Owners securitise stabilised buildings and use the proceeds to fund new construction.
• Scale. Master trusts let an owner keep issuing against the same platform without renegotiating the whole deal.

The US market began with Vantage's 2018-1 issue. By 2026 most large US operators (Vantage, STACK, Aligned, Compass, CyrusOne, Switch, Sabey, DataBank, Flexential and others) had repeat programmes. Europe followed with Vantage's GBP600m Cardiff issue in May 2024, the first EMEA data centre ABS, and Vantage's €640m German deal in June 2025.

The structure step by step

1. Asset entities. Each data centre sits in its own entity, owned by the issuer.
2. Issuer and co-issuer. Bankruptcy-remote companies that issue the notes and grant security over the asset entities, their leases and accounts.
3. Master indenture. Sets the common terms: security, waterfall, triggers, covenants and conditions for adding assets.
4. Series supplements. Each new issue has its own supplement setting the size, coupon, rating, ARD and rated final date. STACK's Series 2021-1 supplement, for example, sets US$400m of Class A-2 notes at 1.877%, rated A- (sf), with an ARD in March 2026 and a rated final date in March 2046.
5. Manager. The sponsor manages the properties under a management agreement for a fee. A back-up manager stands ready to take over.
6. Accounts and reserves. Rent goes to a collection account controlled by the trustee; reserves cover liquidity, capex and specific tenant risks.

Note classes and the VFN

Deals usually include:

• Class A term notes (the bulk, fixed rate, A- (sf) or similar);
• Class A variable funding notes (VFNs), a revolving tranche the issuer can draw and repay, priced as a floating rate loan; and
• Class B or C notes, subordinated, rated lower.

Aligned's 2026-1 presale shows a typical mix: Class A-1 L/C notes (US$37m), a US$250m Class A-1-V VFN and US$789m of Class A-2 term notes, all A- (sf), plus US$116m of Class B notes rated BBB (sf). Vantage Cardiff's VFN pays SONIA + 2.75%.

Reserves

Typical reserves include a liquidity reserve (US$36.9m in Aligned 2026-1; GBP10.4m in Vantage Cardiff; US$24.8m reported for Sabey 2025-2), a cash trap reserve that fills when a trigger is hit, and specific reserves tied to large tenant leases.

Triggers

There are no maintenance covenants in the loan sense. Instead, a DSCR ladder diverts cash as performance weakens: a cash trap at about 1.30x to 1.35x and amortisation at about 1.20x in the public documents reviewed. See data centre ABS triggers for the deal-by-deal table.

Due diligence and disclosure

Rule 144A deals are not publicly registered, so offering documents are generally private. Two useful public windows exist:

• Form ABS-15G reports filed with the SEC summarise the accountants' agreed-upon procedures on the lease data tape and often name the structuring agents and initial purchasers. Sabey's 2025-2 ABS-15G is one example.
• Sponsor filings. Where a sponsor has public reporting obligations, the master indenture and series supplements may be filed, as with STACK (through Blue Owl Digital Infrastructure Trust) and Centersquare and Compass (through the Csquare S-1).

ABS or CMBS?

What to check

1. Closing DSCR and LTV against the trigger levels.
2. Tenant concentration and the share of investment-grade tenants.
3. Conditions for adding or releasing assets.
4. Reserve sizing, especially for large single-tenant leases.
5. The post-ARD step-up and how cash is applied after the ARD.