The OpenAI Foundation
The nonprofit. Worth “approximately $130B based on OpenAI Group’s current valuation”, plus a warrant for more if the share price rises more than tenfold in fifteen years.
AI chatbots tower · floor
Who owns ChatGPT: three shares and one set of votes
There is no single name at the end of this question, and the reason is more interesting than a name would be. OpenAI publishes the split itself, so the figures below are the company’s own.
“Microsoft holds roughly 27% of OpenAI Group.” The largest single shareholding — larger
than the nonprofit’s. “The remaining 47% is held by current and former employees and investors.” Not one
owner but many, and no individual named.Microsoft
Everybody else
Read those three together and something stands out immediately: the nonprofit is not the largest shareholder. Microsoft is. The margin is narrow and OpenAI’s own figure for it is hedged — “roughly 27%” against the Foundation’s 26% — so the ranking matters more than the gap. If ownership were only a question of who holds the most stock, the answer here would be Microsoft.
It is not, and OpenAI explains why on the same page.
This is the sentence that makes the percentages misleading on their own. Microsoft holds the
larger stake; the Foundation holds the larger say. Control here does not travel with shares — it
travels through a separate set of rights that only one party has. So the honest answer to who
owns ChatGPT and the honest answer to who controls it are different answers.“Through special voting and governance rights held solely by the OpenAI
Foundation, the OpenAI Foundation appoints all members of the board of directors of OpenAI
Group and can replace directors at any time.”
That distinction — shares in one hand, votes in another — is the whole structure in a sentence, and it is why the ordinary phrasing of this question does not reach the answer. “Owns” asks about stock. What OpenAI documents is that the appointment of every OpenAI Group director sits with one party alone, and that party is not the largest shareholder. A stake and a say are being held separately here, and only one of them is described as controlling anything.
The next thing to be clear about is what kind of company is being controlled, because the label is doing real work.
A public benefit corporation is an ordinary company in most respects — it raises money, issues
stock, pays people — with one legal difference written into what its directors must weigh. The
company describes the two halves as sharing one aim: “OpenAI Foundation and OpenAI Group have
the same mission.”The for-profit is “a public benefit corporation, called OpenAI Group PBC,
which—unlike a conventional corporation—is required to advance its stated mission and
consider the broader interests of all stakeholders”.
It is worth being precise about what that does and does not settle. A public benefit corporation is a legal form, and OpenAI states the obligation it carries. What no page can tell you is how any particular decision was weighed — that is a question about conduct rather than about structure, and structure is all that is documented here.
Three dates, all from the company’s own account.How it got to this shape
One detail in that history is easy to read past. The recapitalisation was not simply announced; by OpenAI’s own account it followed “nearly a year” of dialogue with two state attorneys general. A nonprofit changing the arrangement around a for-profit subsidiary is a matter those offices supervise, and the company names them as part of how the structure was settled.
Who sits on the board. OpenAI names them: the Foundation is governed by independent directors Bret Taylor (Chair), Adam D’Angelo, Dr Sue Desmond-Hellmann, Dr Zico Kolter, retired U.S. Army General Paul M. Nakasone, Adebayo Ogunlesi and Nicole Seligman — “as well as CEO Sam Altman”. All of them also sit on OpenAI Group’s board except Dr Kolter, who is a non-voting observer there and chairs the Safety and Security Committee, a committee of the Foundation covering “the safety and security practices of all of OpenAI”. OpenAI adds that within a year of the recapitalisation a second Foundation director will also move to Foundation-only duty.
The Foundation’s own stake has a second part that the flat percentage hides. Alongside the 26%, OpenAI says it “also holds a warrant that allows it to receive additional shares in OpenAI Group if it hits a valuation milestone” — specifically, “if OpenAI Group’s share price increases greater than tenfold after 15 years”. The company explains the instrument plainly: a warrant “does not dilute existing holders today, and represents the right to buy shares at a set price”, and “the more the share price exceeds this set price at expiration (15 years), the more equity the OpenAI Foundation receives”.
OpenAI draws its own conclusion from that: with the stake and the warrant together, “the Foundation is positioned to be the single largest long-term beneficiary of OpenAI’s success”. That is the company’s characterisation rather than a measured fact, and it depends on a milestone fifteen years away — but it is on the record, and it is the intent the structure is described as serving.
One more thing has been levelled out, and it matters for reading any older account of this. “All equity holders in OpenAI Group now own the same type of traditional stock that participates proportionally and grows in value with OpenAI Group’s success.” OpenAI presents this as a change from what came before, so an older description of how its equity worked may describe an arrangement that has since been replaced.
What this page will not tell you is what any of it is worth to you as a user. Ownership and governance describe who decides; they do not describe what will be decided. The floors below take the questions that do have documented answers — what the service says it keeps, what it says it is safe for, and what it cannot do.
Where to start
Three ways in, and the second is the one the percentages do not answer.
- “Just tell me the shareholders.”
- The three figures are at the top — then the shares
- “So Microsoft owns it?”
- Not quite. Read the votes
- “What does a public benefit corporation mean?”
- That is the company itself
The shares
Three holdings, one warrant, and one type of stock for everybody. All of it published by the company, and none of it adding up to a single owner.
Is ChatGPT safe?Four different questions wear that word. The two OpenAI documents, quoted, and the two it cannot answer.Open this floor →
Deleting your historyWhat archiving and deleting actually do, the thirty-day window, and the connected-app trap.Open this floor →
AI for codingWhat these tools are genuinely good at in a codebase, and where the failure is expensive.Open this floor →
The votes
Control runs through board appointment rights held by one party alone, not through the shareholding. It is the part that makes the ordinary question the wrong question.
AI detectorsThe whole tower on tools that claim to identify machine writing, and what their own makers publish.Open this floor →
Are they accurateWhat the vendors publish about their own error rates, quoted rather than summarised.Open this floor →
False positivesWho gets wrongly flagged, and what the published research says about who most often.Open this floor →
The company itself
A public benefit corporation controlled by a nonprofit foundation, settled with two state attorneys general. The structure is documented; the conduct is not.
Is using ChatGPT cheatingThe question has an answer, and it is not the one either side of the argument gives.Open this floor →
Business softwareThe tools a small business actually needs, and the order to add them in.Open this floor →
Keeping recordsHow long a tax authority says to keep what, quoted from its own guidance.Open this floor →
What this tower will not do
It will not name one owner. OpenAI publishes three holdings and none of them is a majority, so a single name would be an invention rather than a simplification.
It will not say Microsoft controls OpenAI. It holds the largest stake and OpenAI states that the appointment of every OpenAI Group director rests solely with the Foundation.
And it will not judge whether the structure works as described. That would need evidence about decisions rather than about arrangements, and no such evidence is published. What holds instead is simple: the three equity holdings and their percentages, the Foundation’s warrant and its fifteen-year tenfold milestone, the special voting and governance rights held solely by the Foundation, the description of OpenAI Group as a public benefit corporation required to advance its stated mission, the 2015 and 2019 history, the 28 October 2025 recapitalisation and the dialogue with the Attorneys General of California and Delaware, the named directors, the Safety and Security Committee and the note that all equity holders now hold the same type of stock are quoted from OpenAI’s own published account of its structure, listed below.
Where this page got its facts
- OpenAI, Our structure (that OpenAI was founded in 2015 as a nonprofit with the mission of ensuring that artificial general intelligence benefits all of humanity; that a for-profit subsidiary was created in 2019 and has always been governed and controlled by the nonprofit; the updated structure announced on 28 October 2025, under which the nonprofit is the OpenAI Foundation and the for-profit is a public benefit corporation called OpenAI Group PBC, required unlike a conventional corporation to advance its stated mission and consider the broader interests of all stakeholders; that the Foundation continues to control OpenAI Group and now holds conventional equity in it, with all stockholders participating proportionally; that the recapitalisation was completed after nearly a year of dialogue with the offices of the Attorneys General of California and Delaware; the named Foundation directors Bret Taylor as chair, Adam D’Angelo, Dr Sue Desmond-Hellmann, Dr Zico Kolter, retired U.S. Army General Paul M. Nakasone, Adebayo Ogunlesi and Nicole Seligman, as well as CEO Sam Altman; that through special voting and governance rights held solely by the Foundation it appoints all members of the OpenAI Group board and can replace directors at any time; that the Safety and Security Committee remains a committee of the Foundation chaired by Dr Kolter, who serves exclusively on the Foundation board and as a non-voting observer to the Group board, with a second Foundation director to transition within one year; that at the closing of the recapitalisation the Foundation holds a 26 per cent equity stake worth approximately $130B at the then-current valuation, together with a warrant granting additional shares if the share price increases greater than tenfold after fifteen years, positioning the Foundation as the single largest long-term beneficiary; the explanation of how warrants work; that all equity holders now own the same type of traditional stock; and that Microsoft holds roughly 27 per cent of OpenAI Group with the remaining 47 per cent held by current and former employees and investors) — openai.com, read 22 August 2026.
Written by Alberto Gulotta
Founder and editor of AI Tools Primer, writing from Palermo, Italy. Thirty-five years of taking computers apart, starting with a Commodore 64 — the long version is on the about page.
Something wrong on this page? Write to aitoolsprimer@gmail.com and it gets fixed.
Written on 22 August 2026.
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