IREN Just Passed Its Biggest AI Test as Microsoft and Nvidia Bet Billions

For months, the bears had a simple story on IREN (IREN). They saw it as a Bitcoin (BTCUSD) miner calling itself an artificial intelligence (AI) company, promising huge cloud contracts while delivering almost none of the revenue. Recent developments have made that argument much weaker.

IREN recently announced that Horizon 1, the first of four data centers it is building for Microsoft (MSFT), has been delivered and formally accepted. Microsoft had a five-day window to test the deployment against agreed standards, and once it signed off, IREN was cleared to start sending monthly invoices to Microsoft. This is the first revenue from a five-year $9.7 billion contract, not another promise about capacity to come.

The validation didn’t stop there. Nvidia (NVDA) tested the site running its GB300 systems and granted it Exemplar Cloud status. This is a certification reserved for providers that meet its performance and reliability bar. For a company that listed in 2021 as a Bitcoin miner, having Nvidia vouch for your AI infrastructure is massive. 

Why This Is Bigger Than It Looks

The context is what makes this interesting. The real question hanging over IREN was never demand, but whether it could keep funding a buildout that cost many times its revenue. Horizon 1 starts to answer that.

IREN already lined up a $3.65 billion debt package backed by the Microsoft deal, rated investment-grade. It covers almost all of the GPU spending…