Insurers fund CoreWeave's 7% rated debt, but only $2.9 billion is drawn

Investment-grade GPU debt costs CoreWeave about 7%, compared with 9% to 11% for most of its other debt. At June 30, it had drawn only $2.9 billion of that facility, about 8% of $35.6 billion in principal. Insurers helped fund the loan and want more. Customer contracts will determine how much more is available.

CoreWeave's debt carrying value rose 64% in six months, reaching $35.1 billion at June 30. Only $2.9 billion is on the lower-cost rung, priced at about 7%.

Insurers are already lending to CoreWeave. How much more lower-cost debt it can raise depends on contracts with investment-grade customers.

CoreWeave needs cheaper financing. In the same six months, it paid $14.1 billion in cash for property and equipment. Net interest expense reached $640 million in the second quarter alone. The company says it has found a potential source of lower-cost funding.

The FT reports that CoreWeave is pursuing life insurers. Cofounder Brannin McBee described "all the money in the world that sits in the insurance tranche". The same interview carries the limit. McBee said offtakes from customers that are not investment grade, AI labs among them, are not ready for the insurance tranche yet. An offtake is a customer's contract to buy capacity.

Insurance money can back only loans secured by investment-grade customer contracts. Those contracts currently cover a small share of CoreWeave's debt.

Insurers are not new to the rated rung. CoreWeave's 31 March release says the $8.5 billion DDTL 4.0 facility was anchored by Blackstone Credit and Insurance, with insurance investors among the participants. Moody's rated it A3 and DBRS rated it A (low). Initial borrowing was capped at about $7.5 billion, rising to $8.5 billion as the underlying assets stabilise.

CoreWeave is seeking more of this kind of financing. The amount available depends on how many investment-grade contracts it can use to secure new loans.

The price ladder in CoreWeave's 10-Q, its quarterly filing, shows what the rung is worth. The company funds its data centres mostly through delayed draw term loans, or DDTLs, which lenders fund in instalments as equipment arrives. DDTL 4.0 carries an effective interest rate of 7 percent. DDTL 2.1, DDTL 3.0 and the May 2026 DDTL 5.0 are at 9 percent.

Other debt costs more. The 2030 and 2031 senior notes carry 10% rates, while DDTL 2.0 is at 11%. The first loan, DDTL 1.0, is at 15%. The recourse portion of OEM financing from equipment makers also costs 11%.

The 7 percent includes fees and costs. That is why it differs from the 2.25 percentage point spread over SOFR that DDTL 4.0 pays. SOFR is the benchmark short term dollar rate.

The rate difference can add up. A two-point reduction on the full $8.5 billion facility would save $170 million a year, assuming those assets could otherwise be financed at 9%. Net interest expense was $1,176 million over six months, so $170 million equals about 7% of a year's interest at that pace. Only the $2.9 billion already drawn earns the lower rate today.

The rating comes from the loan structure and its contracts. The FT says the loan, backed by Nvidia chips and a long-term Meta offtake contract, was CoreWeave's first chip-backed loan rated investment grade in full. The 10-Q describes the collateral for its delayed-draw loans as the assets under contributed contracts and pledged cash flows, "generally from investment grade counterparties".

Structure explains part of the price gap. The facility is non recourse apart from limited guarantees, so lenders look to the pledged assets and not to CoreWeave. DDTL 5.0 carries a CoreWeave guarantee and sits at 9 percent. The 2 point gap therefore reflects recourse as well as rating.

The senior notes depend on CoreWeave's own credit. The FT says a 2032 bond yielded nearly 15% on Tuesday, up about 1.5 points in a week. CoreWeave shares fell as much as 15% in Wednesday morning trading. The bond yield shows what investors are asking for the unrated debt.

The rated rung is thin. At June 30 CoreWeave had drawn $2.9 billion of the $8.5 billion on DDTL 4.0, split between $1.4 billion floating and $1.5 billion fixed. Against $35.6 billion of total principal, that is 8 percent.

Most of the cheap money is unused. Roughly $5.6 billion, two thirds of the facility, was still undrawn. DDTL 5.0 stood at $1.1 billion of $3.1 billion, which is 36 percent drawn.

Draws follow construction. The 10-Q says DDTL 4.0 borrowing is subject to debt sizing limits tied to the depreciable cost of the equipment. Cheap money therefore arrives as racks are delivered and put into service.

Lenders were not the binding input. Two facilities with billions of committed capital were each about a third drawn after one to three months. The insurers that anchored DDTL 4.0 already had paper available to them.

CoreWeave has $10.6 billion of principal due over the rest of 2026 and 2027, according to its 10-Q. How much can move into rated debt depends on how much of its $103.7 billion unsatisfied contract backlog comes from investment-grade customers. Forty-one percent of the backlog falls within 24 months.

Rated loans therefore favor contracts with investment-grade customers. That creates concentration in a small number of borrowers, and principal repayment starts as sites are delivered. A GPU lessor competing for the same tenants faces the same question: does its contract book include investment-grade customers?

More insurer money is likely to arrive through additional DDTL facilities. CoreWeave's 10-Q for the quarter ended September 30, due around 9 November, will show DDTL 5.0 after its 30 September draw deadline. At June 30, it had drawn $1.1 billion of $3.1 billion. The filing will also update DDTL 4.0, which had $2.9 billion drawn. If DDTL 4.0 remains less than half drawn, deliveries are limiting access to rated debt, not insurer appetite.