TLDR: Microsoft and OpenAI have finalized a significant restructuring of their six-year partnership, transforming OpenAI into a public benefit corporation valued at an astounding $500 billion. Microsoft will maintain a 27% stake, valued at $135 billion, and retain exclusive IP rights until 2032 or until Artificial General Intelligence (AGI) is achieved and verified by an independent panel. OpenAI commits to $250 billion in Azure services but gains autonomy to work with other cloud providers and third parties, signaling a new era of flexibility and growth for the AI pioneer.
On October 28, 2025, a landmark agreement was announced between Microsoft and OpenAI, fundamentally reshaping their six-year collaboration and valuing the artificial intelligence leader at an impressive $500 billion. This transformative deal restructures OpenAI into a public benefit corporation (PBC) named OpenAI Group PBC, which will be overseen by the non-profit OpenAI Foundation.
Under the new terms, Microsoft will hold a 27% stake in the OpenAI Group PBC, a share valued at approximately $135 billion. This represents a nearly tenfold return on Microsoft’s prior investments totaling $13.8 billion. The OpenAI Foundation itself will hold a 26% stake, estimated to be worth around $130 billion, with potential for further growth tied to future valuation milestones.
A key component of the agreement is OpenAI’s commitment to purchase an additional $250 billion in Azure cloud services from Microsoft through 2032. However, a significant shift in the partnership is the termination of Microsoft’s exclusive ‘right of first refusal’ for OpenAI’s compute needs. This grants OpenAI greater flexibility to engage with other cloud providers if desired, while still ensuring a substantial revenue stream for Microsoft.
Microsoft will retain its position as OpenAI’s ‘designated frontier model partner’ and will hold exclusive intellectual property rights, excluding OpenAI’s consumer hardware, and Azure API exclusivity until Artificial General Intelligence (AGI) is achieved. A crucial safeguard introduced in this agreement is that any declaration of AGI by OpenAI will now require verification by an independent expert panel, balancing innovation with robust oversight.
The deal also addresses OpenAI’s ambitions in hardware, with Microsoft waiving any rights to OpenAI’s hardware developments. This comes after OpenAI’s acquisition of Jony Ive’s startup, io Products, for $6.5 billion in March 2025.
For OpenAI, this restructuring resolves long-standing tensions from the 2019 partnership, which had imposed constraints on its intellectual property and operations. The increased autonomy will enable OpenAI to pursue a potential future IPO, raise capital more effectively, and collaborate more freely with third parties and government clients. The transition also paves the way for SoftBank Corp.’s promised $30 billion investment, which was contingent on OpenAI becoming a for-profit entity.
Financially, OpenAI reported $13.5 billion in losses on $4.3 billion in revenue in the first half of 2025, highlighting the significant capital demands of the AI sector. The news was met positively by investors, with Microsoft’s stock rising between 2% and 4% on the day of the announcement. Evercore ISI analyst Kirk Materne noted that the agreement ‘importantly provides [Microsoft] shareholders with upside optionality related to [OpenAI]’s future growth.’
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The restructuring received approval from regulatory authorities, with the attorneys general of Delaware and California greenlighting the transition. California Attorney General Rob Bonta emphasized, ‘We will be keeping a close eye on OpenAI to ensure ongoing adherence to its charitable mission and the protection of the safety of all Californians.’ OpenAI CEO Sam Altman will not receive any equity in the restructured entity.
