AI data center firm IREN delayed some infrastructure deliveries for Microsoft and laid out another $15 billion in spending, even as a rout in AI stocks puts the sector's massive buildout under pressure. Australia-based IREN also beat quarterly revenue estimates on strong growth in its AI cloud business, lifting its shares 4 per cent in extended trading; the stock closed down about 17 per cent during a broader selloff. IREN said the delay to infrastructure being built for Microsoft would not result in financial penalties as it stemmed from the software giant requesting network-design changes. However, the company pushed the timeline for making operational its more than $4 billion annualized run-rate revenue target to January from year-end, and said the timing could extend to the end of February. IREN, valued at some $7 billion, is building 200 megawatts of data-center capacity for Microsoft in Texas. The company said it would keep investing significantly in computing equipment and infrastructure as it expands its AI cloud business, estimating about $15 billion in capital expenditure over the rest of its fiscal year. Its quarterly filing showed capital commitments of $18.95 billion at the end of September, up from $13.81 billion three months earlier, while GPU hardware on its balance sheet nearly tripled to $5.82 billion from $2.04 billion. Construction in progress stood at about $4.61 billion. IREN's AI cloud revenue in the first quarter rose to $200 million from $71 million in the