Microsoft discloses $10 billion in quarterly revenue from OpenAI arrangements, nearly 11% of its $92.3 billion total

Microsoft's regulatory filing shows $10 billion of revenue from its arrangements with OpenAI (including revenue-sharing) in the quarter ended 30 September 2026. That compares with $24.1 billion for the whole of fiscal 2026 and is nearly 11% of Microsoft's $92.3 billion quarterly total. Receivables from OpenAI rose to $7.2 billion from $6 billion in June, and Microsoft's ownership stake fell from about 25% to 24%. The split between revenue-sharing and Azure services was not disclosed.

Investors get a rare hard number on how much of Microsoft's income depends on one customer and partner. Concentration like this matters for anyone judging Microsoft's earnings quality or OpenAI's ability to pay, since receivables are growing alongside revenue. Enterprises and competitors learn little they can act on, because the filing does not show what the money is for. The impact is mostly financial analysis rather than a change in what AI products can do.

The roughly $40 billion annualised figure is TechCrunch's own extrapolation from one quarter, not something in the filing, and one quarter may not be representative. The framing that the two firms are "competing" is background commentary, not a result of these numbers. The coverage also does not link to the filing, so the figures are credible but second-hand until checked against it.

1. 01Microsoft's next quarterly filing (due around late January 2027): whether OpenAI-related revenue stays near $10 billion and whether it is broken out between revenue-sharing and Azure.
2. 02OpenAI receivables against the $7.2 billion reported: continued growth would suggest payment timing or cash strain.
3. 03Any further change to Microsoft's stake in OpenAI beyond 24%, and any revised terms of the revenue-sharing agreement.