- Internal Microsoft planning documents from early 2023 showed the company targeting a $92 billion return on its ~$13 billion investment in OpenAI — documents disclosed in the Musk v. OpenAI trial in federal court in Oakland.
- CEO Satya Nadella testified the investments “worked out well because we took the risk,” with Microsoft’s OpenAI stake now valued at ~$135 billion as of October — and OpenAI’s overall valuation hitting $852 billion after its March fundraise.
- As part of OpenAI’s restructuring last year, Microsoft converted its revenue-sharing arrangement into a 27% ownership stake in the company — a shift that has put the two firms increasingly in direct competition.
- Musk’s lawsuit alleges OpenAI co-founders Sam Altman and Greg Brockman abandoned the company’s nonprofit mission by commercializing it with Microsoft’s backing; all defendants deny wrongdoing and call the suit baseless harassment designed to benefit Musk’s own xAI startup.
What Happened?
The Musk v. OpenAI trial in Oakland, California produced a striking disclosure Monday: Microsoft’s internal planning documents from early 2023 showed the company had modeled a $92 billion return target from its early OpenAI investments. CEO Satya Nadella took the stand and defended the bet, calling it a calculated risk that paid off. Microsoft invested roughly $13 billion in OpenAI through early 2023. As of October, its stake was valued at approximately $135 billion — already well above that internal target — and OpenAI’s overall valuation has since climbed to $852 billion following a $122 billion funding round completed in March. Elon Musk, who co-founded OpenAI before falling out with its leadership, filed suit in 2024 alleging the company betrayed its nonprofit origins to enrich itself and its corporate backers.
Why It Matters?
The $92 billion return target, now revealed in open court, reframes the Microsoft-OpenAI relationship as a calculated financial bet rather than a philanthropic partnership. That framing matters enormously for Musk’s legal theory: he argues Microsoft aided OpenAI in abandoning its public-benefit mission. Microsoft and OpenAI counter that commercialization was always necessary to fund frontier AI research, and that Musk’s lawsuit is a competitive tactic designed to handicap a rival to his own xAI. The numbers are now in the public record, and they show Microsoft’s bet on OpenAI is one of the most successful venture investments in corporate history — turning $13 billion into what is already a $135 billion position, with OpenAI still growing rapidly.
What’s Next?
The trial will continue to surface internal communications and strategic documents from both Microsoft and OpenAI, potentially revealing more about how each company viewed the nonprofit-to-commercial transition. The restructuring that gave Microsoft a 27% equity stake — in place of the previous revenue-sharing deal — also severed a financial tie while creating a new ownership relationship, and the terms of that swap are likely to receive scrutiny in court. For investors, the more immediate question is what Microsoft’s evolving relationship with OpenAI means as the two increasingly compete in AI products, with Microsoft building its own Copilot capabilities and OpenAI moving more aggressively into enterprise software.
Source: Bloomberg
