What Company Owns OpenAI? Ownership Explained

Who owns OpenAI? The short answer

OpenAI is not owned outright by Microsoft or any other single company. Its business arm, OpenAI Group PBC, has several equity holders. The nonprofit OpenAI Foundation holds a major stake and has powers over the company’s board.

Microsoft is the largest single shareholder, with about 27% of the equity. The Foundation holds about 26%. Employees hold roughly 25%, while other investors hold the rest. These figures are rounded and may change as shares are issued or transferred.

So, what company owns OpenAI? No one company owns it alone. If you ask which company owns OpenAI, the accurate answer is that OpenAI Group PBC has multiple shareholders. A stake can offer financial rights, but it does not always bring control.

OpenAI Group PBC is a public benefit corporation, or PBC. It can earn money while working toward a stated public benefit. Its setup combines investment and business activity with nonprofit oversight. It does not mean the nonprofit owns every part of the business.

How OpenAI’s ownership is divided

The OpenAI ownership structure splits equity among the Foundation, Microsoft, employees, and other investors. Equity means a share of ownership in a company. A holder may gain value if the company grows, subject to the rights tied to those shares.

The rough split below reflects figures given after OpenAI’s 2025 restructuring. These are not fixed amounts. Future funding, share sales, or changes to the company could alter the percentages.

Holder	Approximate stake	What the stake means
Microsoft	27%	Largest single equity holder
OpenAI Foundation	26%	Nonprofit holder with governance powers
Employees	25%	Equity that can support hiring and retention
Other investors	22%	Remaining equity, held by other backers

Shareholders do not all have the same role. Board rights and other rules can give one group a say that exceeds its share of the equity. That distinction helps explain why Microsoft’s large investment does not make it the owner of OpenAI.

When people ask who owns the OpenAI company, they may mean who holds shares, who runs the business, or who can guide its board. Those are separate questions. OpenAI Group PBC runs the commercial business, while the Foundation has a distinct governance role.

What the OpenAI Foundation does

The OpenAI Foundation is a nonprofit and a separate entity from OpenAI Group PBC. It holds about 26% of the business, based on the stated split. The Foundation is not owned by Microsoft, and it is not a company that belongs to OpenAI Group in the usual parent-company sense.

Who owns the OpenAI Foundation? It is a nonprofit, not a subsidiary with a corporate owner. Its board and governing rules shape its work. The Foundation also has powers over the PBC’s board, giving it a formal role in oversight.

This is why share size alone does not tell the full story. Microsoft holds a slightly larger stake, yet the Foundation has governance powers. Those powers help keep the company’s stated mission in view as it seeks funds and sells products.

Governance cannot guarantee a certain outcome. The board still has to weigh safety work, costs, growth, and investor needs. The structure sets out who can make key choices, but people must still make them.

Microsoft’s investment and its limits

Microsoft has invested heavily in OpenAI and has close business ties with the firm. It is the largest single shareholder, with about 27% of its equity. That makes Microsoft an important investor, but not the sole owner.

The two firms have worked together on cloud computing and on bringing OpenAI models into Microsoft products. Their business deal can change over time. A supply or partnership deal is not the same as ownership of the other company.

Microsoft does not own ChatGPT. OpenAI makes and runs ChatGPT. Microsoft may offer OpenAI models through its own products, but access to a model does not transfer ownership of that model or service.

Thus, the question “OpenAI owned by which company?” has no single-company answer. Microsoft has a large stake and a commercial partnership. The Foundation and other holders also have stakes, while OpenAI Group PBC runs the business.

How the structure changed over time

OpenAI began in 2015 as a nonprofit research group. In 2019, it formed a capped-profit business structure to draw in more funding. The cap aimed to limit investor returns while allowing the group to raise money for costly research.

In 2025, OpenAI moved its main business into OpenAI Group PBC. A public benefit corporation can pursue profit while naming a public benefit in its charter. The nonprofit Foundation retained a key role in governance under the new structure.

These changes reflect the cost of building advanced AI systems. Training and running them takes computing power, skilled staff, and long-term funding. The newer structure gives the business ways to raise capital while seeking to preserve its mission.

The structure is unusual, but its parts have different jobs. The PBC runs products and seeks funds. Investors hold equity. The Foundation has nonprofit status and board powers. Those roles can overlap in debate, but they are not interchangeable.

What ownership means for AI development

Investment can pay for research, computing capacity, and new products. It can also bring pressure to grow and earn returns. OpenAI’s mix of nonprofit oversight and business funding tries to balance those forces.

Employees hold about a quarter of the equity in the stated split. That stake can help the company hire and keep people in a crowded AI field. It may also give staff a financial reason to share in the company’s growth.

Still, shares do not settle debates about safety, access, or the pace of AI work. Leaders, board members, staff, investors, and partners can all shape decisions. Formal power depends on the company’s rules, not just a shareholder’s percentage.

Questions like “what company owns AI?” are too broad to have one answer. AI is a field, not one firm. Many companies build AI products, and each has its own owners and governance rules.

Cursor AI is a separate company

Cursor is an AI coding tool made by Anysphere. It is not an OpenAI product, and OpenAI does not own it. Anysphere is the company behind Cursor, though Cursor can use models from several providers.

So, which company owns Cursor AI? Anysphere makes and operates Cursor. This is separate from the question of which company owns OpenAI. The products may use related AI models, but a model provider does not thereby own every product that uses its models.

This distinction matters when comparing AI tools. A company can build an app on a model supplied by another firm. The app maker, model provider, and cloud host can be three different businesses.

OpenAI’s value and what may come next

OpenAI’s valuation was reported at about $852 billion after major funding rounds in early 2026. A valuation is an estimate of a company’s worth based on deal terms and investor views. It is not the same as cash in the bank.

A high valuation may help OpenAI attract more funding and skilled workers. It also raises the stakes for the Foundation’s oversight. Investors may seek growth, while the nonprofit must weigh the company’s stated public benefit.

Future funding or new shares could change the ownership split. New board rules could also affect who has formal power. Readers should check the date and source when they see a claim about current stakes.

Conclusion: ownership is not the same as control

OpenAI Group PBC is held by several groups, not owned outright by Microsoft. Microsoft has about 27% of the equity, the Foundation about 26%, and employees about 25%. Other investors hold the remaining shares in the reported split.

The Foundation’s board powers give it a key role beyond its equity stake. Microsoft remains a major investor and partner, but it does not own ChatGPT or control OpenAI alone. The best answer depends on whether you mean shares, day-to-day business, or formal governance.

OpenAI’s structure aims to bring in capital while keeping a nonprofit mission in view. That balance will depend on the choices made by its board and leaders. Ownership figures can shift, so treat any percentage as a dated snapshot.