Microsoft said in a regulatory filing on Wednesday that it generated $10 billion in revenue from commercial arrangements with OpenAI in the quarter ended 30 September 2026, including revenue-sharing payments. The figure represents nearly 11% of Microsoft’s total quarterly revenue of $92.3 billion, underlining how financially entwined the two companies remain even as they increasingly compete for the same customers.
The Numbers In The Filing
The quarter ended 30 September 2026 is the first quarter of Microsoft’s fiscal 2027, since its financial year begins in July. For the full 2026 fiscal year, revenue from OpenAI reached $24.1 billion. At the latest quarter’s pace, Microsoft would pull in $40 billion annually from OpenAI-related arrangements, an annualised pace, not a company forecast.
Microsoft also reported $7.2 billion in outstanding receivables from OpenAI at the end of September, up from $6 billion at the end of June. That money represents amounts OpenAI owes for previous transactions, not additional revenue, and it is a reminder that the relationship is not only about income: Microsoft is carrying a balance owed by its largest AI partner.
What the filing does not reveal is the split. It is not clear how much of the $10 billion came from revenue-sharing payments as opposed to Azure cloud computing services, and Microsoft has not specified the breakdown. That distinction matters, because revenue sharing reflects OpenAI’s success while Azure sales reflect its dependence, with different implications for who needs whom.
A Partnership Rewritten, Not Ended
OpenAI reportedly shares 20% of its revenue with Microsoft under a deal where the giant invested more than $13 billion in the AI startup, unconfirmed by either company. Under an April 2026 agreement, OpenAI is on the hook to continue sharing revenue with Microsoft through 2030, subject to a cap, while expanding elsewhere, including an enterprise deal with Oracle.
The companies began loosening their once-exclusive partnership in October 2025, when Microsoft relinquished its hold on OpenAI to give the startup more freedom to partner with other cloud providers. In exchange, OpenAI committed to buying an additional $250 billion in Azure services as part of that agreement, a commitment that helps explain why Azure growth remains central to Microsoft’s results.
Microsoft’s ownership stake in OpenAI has also drifted down, from about 25% in June to 24% in September, continuing a gradual decline from roughly 27% following the October 2025 recapitalisation. Microsoft did not specify what caused the dilution, and the filing leaves open whether further rounds will erode the stake further.
Why It Matters
The disclosure matters because it quantifies a relationship that is discussed in strategic terms. A partner accounting for nearly 11% of quarterly revenue is a concentration few companies of Microsoft’s size report, and it reframes the OpenAI tie from a venture-style bet into a core revenue line. Investors watching for returns on AI spending now have a number to track.
It clarifies the competitive tension at the heart of the partnership. Microsoft sells its own Copilot products, OpenAI sells ChatGPT, and both chase the same enterprise customers, yet Microsoft still books billions from OpenAI’s success. The arrangement works while OpenAI keeps growing, but it leaves Microsoft exposed if that growth slows or if OpenAI’s spending shifts decisively toward rival clouds.
The filing lands alongside Microsoft’s cloud quarter, in which Azure growth helped quiet concerns about AI spending. Together, they show a company whose AI story runs on two tracks: its own cloud expansion, and a revenue stream from the startup it helped create. The $10 billion figure is clear evidence of how large the second track has become.
Background
The Microsoft-OpenAI relationship began as an investment and an exclusive cloud deal, and has evolved into something complicated: a partnership, a supplier contract, a revenue share and a rivalry. The September quarter’s filing does not resolve that tension, but it puts a price on it, and that price will be the benchmark every future quarter is measured against.
Source: TechCrunch report
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