Microsoft’s jumbo debt sale draws more than €115 billion in demand

Microsoft asked the debt markets for money. The debt markets responded with something closer to a standing ovation.

The company’s jumbo debt offering pulled in more than €115 billion in investor demand. That is a lot of people wanting to lend to a company that is not, by any reasonable measure, short on cash.

The timing matters. Big Tech is spending at a historic pace to build out AI infrastructure. This deal shows how eager investors are to help pay for it.

The details of the deal

Microsoft is targeting at least $25 billion in this sale. It marks the company’s first investment-grade bond offering in the US since 2017.

The offering is split into as many as 10 tranches. A tranche is simply a slice of the deal with its own maturity date and interest terms, letting investors pick how long they want their money tied up.

Maturities range from 2 years all the way out to 40 years. That includes a potential note that would not mature until 2066.

Wells Fargo, JPMorgan Chase, and UBS are running the issuance. Microsoft says proceeds will go toward general corporate purposes, with capital expenditures called out specifically.

Why Microsoft is borrowing at all

Microsoft carries a AAA credit rating, the highest grade available. Only one other US public company holds that distinction: Johnson & Johnson.

And Microsoft’s reserves are being put to work. In the third quarter of fiscal 2026, the company reported $45.2 billion in data center and equipment capex, including leases.

For the full 2026 fiscal year, total capex is set to exceed $115 billion.

Most of that spending is tied to AI. Training and running large AI models requires enormous data centers, specialized chips, and a great deal of electricity.

A familiar pattern in Big Tech

Microsoft is not the first giant to make this move. Alphabet ran a $25 billion bond sale in August 2026 that attracted around $115 billion in orders.

The parallels are hard to miss. Similar target size, similarly enormous order books, and the same underlying driver: the cost of building AI capacity.

What this means for markets and the AI buildout

Strong reception for both Alphabet and Microsoft could encourage other tech firms to fund their own AI ambitions through debt.

There are risks to keep in view. Capex north of $115 billion a year assumes AI demand keeps growing fast enough to justify the investment.

A AAA rating cushions that risk for Microsoft, but it does not erase it. Less pristine borrowers following Microsoft’s lead would face steeper costs and less margin for error.

How the final pricing lands across each tranche will offer the next clue. Tight spreads would confirm that lenders see Microsoft’s AI spending as a safe bet rather than a speculative one.