What did IREN's $3.65 billion financing deal achieve?

IREN secured $3.65 billion in debt financing to fund GPUs for its Microsoft AI cloud contract. Combined with a $1.94 billion prepayment from Microsoft, the company covered about 96% of its $5.81 billion GPU investment without issuing new shares.

Why is IREN's financing deal unusual?

Many bitcoin mining and AI infrastructure companies have historically raised capital by selling new shares, which dilutes existing shareholders. IREN instead secured investment-grade debt financing, allowing it to expand without reducing shareholder ownership.

How did Microsoft help IREN obtain low-cost financing?

The financing is backed by Microsoft's contracted payments under a long-term AI cloud agreement. Because lenders view Microsoft's credit quality as exceptionally strong, IREN was able to secure funding at a borrowing cost of around 6%.

What does it mean that the customer is the collateral?

Rather than relying solely on IREN's balance sheet, lenders are lending against the future cash flows expected from Microsoft's contract. In effect, Microsoft's creditworthiness played a major role in supporting the financing structure.

Why did the financing receive an investment-grade rating?

The facility received an A rating from Fitch and an A (low) rating from DBRS because the debt is secured by Microsoft-backed contractual payments. The ratings agencies focused heavily on the strength of Microsoft's credit profile rather than IREN's standalone financial position.

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IREN taps Microsoft credit for $3.65B debt

Written by Isaac FrancisPublished Jun 15, 2026, 8:07 AM

IREN has secured a $3.65 billion debt facility backed by its AI cloud agreement with Microsoft, allowing the company to finance 96% of a $5.81 billion GPU deployment without issuing new equity.

The financing, arranged by Goldman Sachs and JPMorgan, carries a blended borrowing cost of 6.00%, while Microsoft also provided a $1.94 billion prepayment under a five-year contract valued at $9.7 billion.

“Essentially got the GPUs for next to nothing,”

IREN management said of the financing structure, although the company’s stated 3.31% all-in cost assumes Microsoft’s prepayment functions as cost-free capital.

The facility received an A rating from Fitch and an A (low) rating from DBRS because lenders are primarily relying on contracted Microsoft payments rather than IREN’s standalone credit profile, effectively allowing the company to borrow against the strength of Microsoft’s balance sheet.

The investment-grade ratings open access to large pools of pension and insurance capital that are generally restricted from holding speculative-grade debt, reducing financing costs compared with private-credit markets, and following the financing IREN shares were unchanged.

The deal follows a similar $8.5 billion GPU-backed financing completed by CoreWeave earlier this year, highlighting a growing trend of AI infrastructure providers using long-term hyperscaler contracts to secure low-cost funding for data centre expansion.

Analysts expect other infrastructure operators including TeraWulf, Cipher Mining, Applied Digital, Core Scientific and Hut 8 to pursue similar structures as competition intensifies to secure investment-grade counterparties and lower-cost capital.