IREN plans $2B convertible notes for data center expansion and AI infrastructure

IREN, the company formerly known as Iris Energy, is looking to raise $2 billion through convertible notes to bankroll what might be one of the most ambitious pivots in the crypto-adjacent infrastructure world. The funds will go toward data center expansion, AI infrastructure buildout, debt repayment, and general corporate purposes.

The offering is split into two tranches: $1 billion maturing in 2032 and another $1 billion maturing in 2033. Both carry low coupons in the range of 0% to 1%.

From Bitcoin mining to GPU farms

IREN’s trajectory reads like a case study in strategic reinvention. The company built its name mining Bitcoin, leveraging renewable energy sources to power its operations. Now it’s channeling that same power infrastructure into AI computing at scale.

The centerpiece of that transformation is Sweetwater 1, a facility in Texas targeting a staggering 1.4-gigawatt capacity. IREN plans to deploy over 700,000 GPUs at the site using advanced cooling technologies, turning it into one of the largest AI-ready data center campuses in the country.

IREN has secured a $9.7 billion five-year agreement with Microsoft, providing the kind of revenue certainty that makes capital markets sit up and pay attention. That deal covers a 750-megawatt data center campus, essentially giving IREN a locked-in anchor tenant for a significant chunk of its new capacity.

IREN has also lined up approximately $400 million in annual contracts from its British Columbia site, demonstrating that its revenue base extends beyond any single hyperscaler relationship.

The capital machine behind the pivot

The company has raised approximately $9.2 billion recently through various funding mechanisms to support its extensive capital expenditure needs.

The convertible note structure is telling. By offering notes with conversion premiums and near-zero coupons, IREN is essentially saying: we believe our equity will be worth significantly more by the time these notes mature. Low coupon rates on convertible debt typically signal strong confidence in the issuer’s growth trajectory, because noteholders are accepting minimal interest payments in exchange for the option to convert into equity at a higher price.

This approach also lets IREN avoid the immediate dilution that a straight equity raise would cause. The dilution only happens if and when noteholders convert, which would theoretically occur at a higher share price, softening the blow for existing shareholders.

Why this matters for the broader market

IREN’s renewable energy foundation adds another layer of competitive advantage. As AI workloads face increasing scrutiny over their environmental footprint, data centers powered by clean energy sources carry a premium in contract negotiations with ESG-conscious enterprise customers.

The dual-tranche structure with staggered maturities in 2032 and 2033 also gives IREN flexibility in managing its debt obligations. Rather than facing a single $2 billion maturity wall, the company spreads its refinancing risk across two years.

The risk, of course, is execution. Deploying 700,000 GPUs at a single campus while simultaneously building out gigawatt-scale power capacity requires flawless project management and supply chain coordination. The convertible notes add leverage to the balance sheet, and leverage cuts both ways.

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