Microsoft pulls in $10 billion from OpenAI as partnership yields record quarterly revenue

Microsoft disclosed in a regulatory filing on Wednesday that commercial arrangements with OpenAI generated $10 billion in revenue for the quarter ended September 30. That figure accounts for roughly 11% of Microsoft's $92.3 billion in total quarterly revenue, up from an average of about $6 billion per quarter during the previous fiscal year, when OpenAI generated $24.1 billion overall. The haul surpassed several of Microsoft's long-standing divisions, including Xbox at $5.4 billion, search and advertising at $6.6 billion, and device and Windows licensing sales at $3.6 billion. [1][2]

The $10 billion total includes revenue-sharing arrangements as well as OpenAI's spending on Azure computing capacity to train and run artificial intelligence models, though Microsoft did not provide a specific breakdown between the two. The company reported $7.2 billion in outstanding receivables owed by OpenAI at the end of September. Microsoft also stated that its ownership stake in OpenAI dipped to roughly 24%, down from about 25% in June, and that it has funded $12.0 billion of a promised $13.0 billion investment. [1][2]

The financial milestone comes as the two companies gradually loosen their partnership. Although OpenAI agreed to purchase an additional $250 billion in Azure services and continue sharing revenue through 2030, an agreement in April 2026 gave the startup freedom to use competing cloud providers. In its quarterly filing, Microsoft expanded warnings regarding risks tied to outside AI partners, citing limited visibility and control over model design and testing, as well as the risk that key partners could alter their computing purchases. [1][2]