Microsoft cites third‑party data‑center delays for $5 billion AI capex shortfall, IREN shares tumble

Microsoft said its AI infrastructure spending was $5 billion below plan because third‑party data‑center capacity was not ready on time. IREN, a cloud provider building GPU sites for Microsoft in Texas, was identified as one of the delayed partners. The news sent IREN’s stock sharply lower across multiple exchanges.

The $5 billion capex gap reduces Microsoft’s quarterly spending outlook and pushes more of its AI‑related outlays into later quarters, which may affect its cash flow timing. IREN’s share price fell between 9% and 20% as investors reassess the timing of revenue from its $9.7 billion contract with Microsoft.

  • 1Microsoft’s capital expenditures were $45.2 billion in the quarter, down $5 billion from its prior plan because some third‑party capacity deliveries were delayed.
  • 2The shortfall of $5 billion represents about 11% of Microsoft’s $45.2 billion quarterly capex.
  • 3Microsoft’s contract with IREN is valued at approximately $9.7 billion through 2031.
  • 4Three undelivered tranches of the IREN contract are worth about $7.3 billion, with Horizon 4 alone about $2.4 billion.
  • 5IREN’s shares fell about 9% to $19.70 after the report linked its delays to Microsoft’s capex shortfall.
  • 6IREN reported quarterly revenue of $228 million and a net loss of $263 million for the quarter ended September.

Sources