OpenAI restructuring (OpenAI Group PBC)

The OpenAI restructuring was a 2025 recapitalization that reorganized OpenAI into a nonprofit foundation that controls a for-profit public benefit corporation. OpenAI announced the completion on October 28, 2025. The for-profit arm became a Delaware public benefit corporation named OpenAI Group PBC, and the nonprofit that sits above it was renamed the OpenAI Foundation. The Foundation kept formal control and took what OpenAI describes as a 26 percent equity stake in OpenAI Group, worth approximately $130 billion. Microsoft put its own holding at approximately $135 billion, which it described as roughly 27 percent on an as-converted diluted basis inclusive of all owners. Those two percentages are measured on different bases and are not a like-for-like ranking. The deal also reset the terms of the Microsoft partnership and followed a long review by the attorneys general of California and Delaware, which ended in formal non-objection rather than approval. ^[1][2][14]

The change settled a question that had hung over the company for years. OpenAI started as a nonprofit research lab with a charitable mission, then bolted a for-profit subsidiary onto that structure to raise the money needed to train large models. By 2024 the company wanted to raise far more capital and possibly go public, and the old structure made that hard. The recapitalization kept the nonprofit in charge on paper while giving investors a cleaner equity story. ^[3][4]

Background

OpenAI was founded in December 2015 as a nonprofit, OpenAI Inc, with the stated goal of making sure that artificial general intelligence benefits all of humanity. The nonprofit form fit the mission, but it could not easily raise the kind of money that frontier AI research demands. ^[4][5]

In 2019 OpenAI created a hybrid structure. It set up a for-profit entity, OpenAI LP, underneath the nonprofit. The for-profit used a capped-profit design. Early investors and employees could earn returns, but those returns were capped at a fixed multiple of their investment, and anything above the cap flowed back to the nonprofit. OpenAI's own announcement of the structure said that "Returns for our first round of investors are capped at 100x their investment", with the cap negotiated separately for each limited partner and expected to fall in later rounds. Microsoft announced "an investment of $1 billion from Microsoft" in July 2019 and became the lab's main commercial partner and compute provider. ^[4][6][13]

The arrangement also carried an unusual clause. OpenAI's deal with Microsoft said that once OpenAI's board determined the company had reached AGI, that AGI and the systems built on it would sit outside the commercial license granted to Microsoft. In effect the nonprofit board reserved the right to decide when a technology was advanced enough to fall outside the partnership. ^[7][8]

The limits of nonprofit control became national news in November 2023. On November 17, 2023, the OpenAI board fired chief executive Sam Altman, saying he had not been consistently candid in his communications with the board. Employees and investors revolted, Microsoft offered to hire the departing staff, and within about five days Altman returned as chief executive. Most of the directors who had pushed him out left, a new board formed, and Microsoft later gained a board observer seat. The episode showed how much practical power had shifted toward the for-profit side, even though the nonprofit held formal authority. ^[4][9]

In December 2024 OpenAI published a plan to evolve its structure. The proposal would convert the for-profit into a Delaware public benefit corporation and give the nonprofit equity instead of its existing control-through-capped-profit setup. The plan drew immediate scrutiny from regulators and critics who worried that charitable assets were being moved into private hands. Over the course of 2025 the design shifted in response. By the time the deal closed, the nonprofit kept hard control rather than simply taking a passive stake. ^[1][3][10]

What the new structure is

A public benefit corporation, or PBC, is a for-profit company that is legally required to pursue a stated public benefit alongside profit. Directors of a PBC must weigh the mission and the interests of stakeholders, not just shareholder returns. The form exists in Delaware and many other states and is used by companies that want a profit motive without dropping a social purpose. Anthropic is a Delaware public benefit corporation. xAI is often listed alongside it, but that is out of date: xAI incorporated as a Nevada public benefit corporation in 2023 and then terminated the status, and Nevada secretary of state records show the designation was gone as of May 9, 2024. The combined company formed when xAI merged with X kept no PBC structure. ^[2][11][24]

Under the 2025 structure, the nonprofit OpenAI Foundation sits at the top. Below it is OpenAI Group PBC, the operating for-profit that builds and sells products such as ChatGPT and runs the research organization. The Foundation controls OpenAI Group through special voting and governance rights that it alone holds. According to OpenAI, the Foundation appoints every member of the OpenAI Group board of directors and can replace any of them at any time. ^[1][3]

OpenAI framed the result as keeping its mission at the center while removing the fundraising limits of the old model. The company said the mission of ensuring that AGI benefits all of humanity would now be advanced through both the business and the Foundation. Removing the capped-profit ceiling cleared the way for larger raises and a possible public listing. ^[1][3]

The equity split

The recapitalization gave the nonprofit conventional equity for the first time, so all stockholders share proportionally in any rise in the value of OpenAI Group. Neither OpenAI nor Microsoft published a headline valuation in its announcement; press coverage at the closing put OpenAI Group at about $500 billion, which is what a 26 percent stake worth roughly $130 billion implies. The ownership figures published at the closing were as follows. ^{[1][2][3][14]}

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The 26 and the 27 do not sit on the same measuring stick, and a straight comparison of them is misleading. OpenAI states the Foundation's holding as an equity stake in OpenAI Group at the closing. Microsoft states its own holding on an as-converted diluted basis that counts every owner, which is a fully diluted view. Microsoft also gives a third number on a third basis: excluding the effect of OpenAI's recent funding rounds, it says it held 32.5 percent on an as-converted basis in the OpenAI for-profit. Any statement that Microsoft owns more of OpenAI than the Foundation does is comparing figures the two companies did not compute the same way. ^[1][2][14]

OpenAI also said the Foundation holds a warrant that can deliver additional shares if OpenAI Group hits a valuation milestone. In OpenAI's wording, if OpenAI Group's share price "increases greater than tenfold after 15 years", the Foundation receives significant additional equity, which would push its stake higher over time if growth is strong. ^[2]

The Foundation said it would start with a $25 billion commitment to charitable work in two areas. The first is health and curing diseases, with funding aimed at faster diagnostics, better treatments, and cures, including the creation of open-sourced frontier health datasets and funding for scientists. The Foundation's own site now labels that program Life Sciences and Curing Diseases. The second is what OpenAI calls AI resilience, meaning practical technical work to maximize the benefits of AI and minimize its risks. OpenAI described the Foundation as "one of the best resourced philanthropic organizations ever", given the size of its equity. ^[1][12]

The Microsoft agreement

Alongside the restructuring, OpenAI and Microsoft signed a revised partnership on October 28, 2025. Microsoft had invested more than $13 billion in OpenAI since 2019, and its post-recapitalization holding, which it valued at approximately $135 billion, made the deal a large paper gain for the company. Microsoft's own wording is that the holding represents "roughly 27 percent on an as-converted diluted basis, inclusive of all owners", meaning employees, investors and the OpenAI Foundation, and that "excluding the impact of OpenAI's recent funding rounds, Microsoft held a 32.5 percent stake on an as-converted basis in the OpenAI for-profit". ^[14][15]

The new terms changed several points that had defined the relationship. Microsoft's intellectual property rights to OpenAI's models and products were extended through 2032 and now include models developed after a declaration of AGI, with safety guardrails attached. The most watched change concerned the AGI clause itself. Under the revised deal, any claim by OpenAI that it has reached AGI must be verified by an independent expert panel rather than decided by OpenAI's board alone. Microsoft's rights to OpenAI research run until that panel verifies AGI or through 2030, whichever comes first. ^[7][8][14]

On compute, OpenAI committed to purchase an incremental $250 billion of Microsoft Azure services. At the same time, Microsoft gave up its right of first refusal to serve as OpenAI's cloud provider, which freed OpenAI to buy capacity elsewhere. The two companies said they would keep working together on data center capacity, next-generation chips, and AI security. Reporting also described a revenue-sharing arrangement that continues for a defined period. ^[14][15][16]

Attorneys general and the memoranda of understanding

Because OpenAI's nonprofit holds charitable assets, state charity regulators had standing to review the conversion. Delaware Attorney General Kathy Jennings opened a review on October 9, 2024, after OpenAI's plan to convert the nonprofit into a for-profit PBC became public. Her office retained independent counsel and an independent financial advisor, Moelis and Company, to assess whether the terms were fair to the nonprofit. The office coordinated with California Attorney General Rob Bonta, since OpenAI operates in California and holds assets there. ^[10][17][18]

The review ended in non-objection, not approval, and the distinction matters. Delaware issued a Statement of No Objection on October 28, 2025, which Attorney General Jennings conditioned on a list of governance commitments. California worked through a memorandum of understanding with OpenAI signed on October 27, 2025, in which the attorney general agreed, subject to the accuracy of OpenAI's representations and to board approval of the deal, that he "shall not object to the Recapitalization". Neither office endorsed or signed off on the transaction. OpenAI's own description is that the recapitalization "was completed after nearly a year of engaging in constructive dialogue with the offices of the Attorneys General of California and Delaware". Under the conditions, the nonprofit's safety mission keeps priority across the enterprise. The Safety and Security Committee remains a committee of the OpenAI Foundation rather than the for-profit, and it keeps authority to require mitigation measures up to and including halting the release of a model or system. The committee chair gained the right to observe all OpenAI Group board and committee meetings. The attorneys general positioned themselves as ongoing watchdogs with continuing oversight of how OpenAI honors the commitments. ^[10][17][19]

Criticism

The restructuring drew sustained criticism, much of it focused on whether nonprofit control is real or mostly formal. Elon Musk, who helped fund OpenAI in its early years and later founded the rival lab xAI, was the most prominent critic. He had sued Altman and OpenAI in February 2024 in the case known as Musk v. Altman, accusing them of abandoning the founding charitable mission for private profit. Musk asked the court to unwind the conversion of the for-profit into a public benefit corporation and to remove Altman and co-founder Greg Brockman from their roles. He framed the change as executives taking control of a charity. OpenAI rejected the account and published its own version of the early history. In 2026 a jury in California ruled against Musk, finding that he had filed his core claims too late under the statute of limitations. Musk called the outcome a calendar technicality and said he would appeal. ^[20][21][22]

Other critics came from the nonprofit and consumer advocacy world rather than from competitors. Several groups argued during the review that moving control and assets out of the original nonprofit amounted to converting a charity into a commercial enterprise, and that the public would lose the protections that came with the original form. Some legal observers questioned how meaningful the Foundation's control would be in practice, given that the people running the nonprofit and the for-profit overlap and that investors now hold a large majority of the equity. Supporters of the deal countered that the Foundation's hard governance rights, the attorney general conditions, and the safety committee's authority preserve the mission better than the old capped-profit structure did. ^[3][19][23]

Significance for AI governance

The recapitalization matters beyond OpenAI's own balance sheet because it tested how a charitable mission can survive contact with the capital needs of frontier AI. Training and running large models costs tens of billions of dollars, and the firms doing that work have looked for structures that attract investment without fully abandoning a public-interest story. OpenAI's answer, a nonprofit that controls a public benefit corporation, became a reference point for that debate. ^[3][11]

The outcome also showed the reach and the limits of state oversight. Two attorneys general extracted binding commitments on safety governance and on the primacy of the mission, which is more leverage than regulators usually have over a private company. At the same time, the deal cleared OpenAI to raise far more money and to head toward a possible public offering, which is what the company wanted from the start. Whether the Foundation's control proves durable, and whether the safety commitments hold as the commercial stakes grow, will be the measure of the new structure over the coming years. ^[1][3][19]

References

1. ^OpenAI. "Built to benefit everyone." October 28, 2025. openai.com/...built-to-benefit-everyone
2. ^OpenAI. "Our structure." openai.com/our-structure
3. ^Field, Hayden. "OpenAI completes restructure, solidifying Microsoft as a major shareholder." CNBC, October 28, 2025. cnbc.com/...open-ai-for-profit-microsoft
4. ^"OpenAI." Wikipedia. en.wikipedia.org/...OpenAI
5. ^Allyn, Bobby. "How OpenAI's origins explain the Sam Altman drama." NPR, November 24, 2023. npr.org/...chatgpt-openai-sam-altman-fired-explained
6. ^OpenAI. "OpenAI LP." March 11, 2019. openai.com/...openai-lp
7. ^Willison, Simon. "Tracking the history of the now-deceased OpenAI Microsoft AGI clause." April 27, 2026. simonwillison.net/...now-deceased-agi-clause
8. ^"Microsoft says 'once AGI is declared by OpenAI' it will be verified by independent experts." TechRadar. techradar.com/...xperts-heres-why-thats-a-big-deal
9. ^"Musk v. Altman." Wikipedia. en.wikipedia.org/...Musk_v._Altman
10. ^State of Delaware. "AG Jennings completes review of OpenAI recapitalization." October 28, 2025. news.delaware.gov/...ew-of-openai-recapitalization
11. ^"OpenAI's Public Benefit Corporation Plan (PBC) Explained." Bloomberg, October 29, 2025. bloomberg.com/...it-corporation-plan-pbc-explained
12. ^OpenAI Foundation. "OpenAI Foundation." openai.com/foundation
13. ^Microsoft. "OpenAI forms exclusive computing partnership with Microsoft to build new Azure AI supercomputing technologies." July 22, 2019. news.microsoft.com/...-supercomputing-technologies
14. ^Microsoft. "The next chapter of the Microsoft and OpenAI partnership." October 28, 2025. blogs.microsoft.com/...icrosoft-openai-partnership
15. ^"Microsoft and OpenAI reach new deal valuing OpenAI at $500 billion." NBC News, October 28, 2025. nbcnews.com/...luing-openai-500-billion-rcna240255
16. ^"Microsoft loses IP exclusivity rights and sees revenue payments capped in updated OpenAI deal." Data Center Dynamics. datacenterdynamics.com/...d-in-updated-openai-deal
17. ^California Department of Justice. "Final Executed MOU Between OpenAI and California AG." October 27, 2025. oag.ca.gov/...enAI)%20(Signed%20by%20CA%20DOJ).pdf
18. ^"Delaware reaches agreement with Open AI." Delaware Business Now. delawarebusinessnow.com/...-agreement-with-open-ai
19. ^"Delaware and California AGs to act as OpenAI's watchdogs as company restructures." Delaware Public Media, November 3, 2025. delawarepublic.org/...dogs-as-company-restructures
20. ^"Here's why Elon Musk lost his suit against OpenAI." MIT Technology Review, May 18, 2026. technologyreview.com/...n-musk-suit-openai-verdict
21. ^"Jury sides with OpenAI, saying Elon Musk's lawsuit was not filed on time." PBS News, 2026. pbs.org/...lon-musks-lawsuit-was-not-filed-on-time
22. ^"Musk slams Altman trial verdict as a 'technicality,' vows to appeal." CNBC, May 18, 2026. cnbc.com/...musk-altman-openai-trial-verdict
23. ^Sharma, Shubham. "OpenAI restructures into public-benefit firm, Microsoft takes 27% stake." Al Jazeera, October 28, 2025. aljazeera.com/...fit-firm-microsoft-takes-27-stake
24. ^"Elon Musk's xAI secretly dropped its benefit corporation status while fighting OpenAI." CNBC, August 25, 2025. cnbc.com/...efit-corp-status-while-fighting-openai