Ownership profile
Who owns OpenAI?
OpenAI's consumer products (including ChatGPT) are operated by OpenAI Group PBC, a Delaware public benefit corporation controlled by the OpenAI Foundation, a 501(c)(3) nonprofit; no private equity firm holds an ownership stake in OpenAI itself, though PE firms have invested in a separate enterprise joint venture (OpenAI Deployment Company) that OpenAI majority-owns.
Ownership profile
OpenAI
OpenAI Foundation (nonprofit, EIN 81-0861541) controlling OpenAI Group PBC (Delaware Public Benefit Corporation)
Evidence (11)
OpenAI launched a separate enterprise joint venture called OpenAI Deployment Company (DeployCo), majority-owned and controlled by OpenAI, backed by PE firms including TPG, Bain Capital, Advent International, and Brookfield Asset Management — but this is a subsidiary JV, not PE ownership of OpenAI itself.
https://pitchbook.com/news/articles/openai-unveils-pe-backed-joint-venture-to-accelerate-ai-adoptionDeployCo is structured as a Delaware LLC majority-owned by OpenAI with super-voting share arrangements to maintain OpenAI's control; PE firms are minority investors in the JV, not in OpenAI Group PBC.
https://www.privateequitywire.co.uk/openai-to-commit-up-to-1-5bn-to-pe-linked-venture/The restructuring received regulatory approval from the attorneys general of California and Delaware following nearly a year of dialogue.
https://www.eweek.com/news/openai-restructure-for-profit/OpenAI completed a corporate restructuring on October 28, 2025: the nonprofit is now called the OpenAI Foundation, and the for-profit operating arm is now OpenAI Group PBC, a Delaware Public Benefit Corporation.
https://openai.com/our-structure/The OpenAI Foundation continues to control OpenAI Group PBC and holds conventional equity in it; the Foundation holds roughly 26% of the for-profit arm.
https://www.cnbc.com/2025/10/28/open-ai-for-profit-microsoft.htmlMicrosoft holds approximately 27% of OpenAI Group PBC (on an as-converted diluted basis), making it the single largest external shareholder; it is a corporation, not a PE fund.
https://www.cnbc.com/2025/10/28/open-ai-for-profit-microsoft.htmlOpenAI was founded in 2015 as a nonprofit and has been a tax-exempt 501(c)(3) organisation since 2016.
https://capitalresearch.org/article/profits-and-nonprofits-the-odd-evolution-of-openai/OpenAI confidentially filed for an IPO as of mid-2026, targeting a valuation above $1 trillion; it remains a private company with no public ticker as of the investigation date.
https://tradeflock.com/who-owns-openai/OpenAI has raised large VC-style rounds; SoftBank led a $40 billion investment in 2025 and OpenAI raised $122 billion in early 2026 from investors including Amazon, SoftBank, and Nvidia — these are strategic/corporate/VC investors, not PE buyout firms taking control.
https://aifundingtracker.com/who-owns-openai/The remaining ~47% of OpenAI Group PBC is held by current and former employees and investors (VC-backed funding rounds from firms including Thrive Capital, SoftBank, Sequoia, a16z, and others — not PE buyout funds holding equity in OpenAI itself).
https://penchan.co/en/market/ai/openai/investors-and-partners/The OpenAI Foundation's nonprofit status is EIN 81-0861541, registered as a 501(c)(3) organisation with Form 990 filings from 2016–2023.
https://commons.wikimedia.org/wiki/File:OpenAI_corporate_structure.svgWhat's uncertain
- Structure classification is complex: 'nonprofit' is used here because the OpenAI Foundation (a 501(c)(3)) holds mission control and board appointment rights over OpenAI Group PBC; however the consumer-facing operating entity is technically a for-profit public benefit corporation. A 'corporate' or hybrid label would also be defensible.
- pe_involvement is scored 'none' because no PE buyout firm holds equity in OpenAI Group PBC itself. However, PE firms (TPG, Bain Capital, Advent, Brookfield) are minority investors in the OpenAI Deployment Company JV, a subsidiary majority-controlled by OpenAI — this is not the same as PE ownership of OpenAI.
- The complete post-2026-round cap table has not been publicly disclosed by OpenAI; percentage stakes for all investors other than the Foundation (~26%) and Microsoft (~27%) are estimates.
- An IPO filing was reportedly made confidentially in mid-2026; if completed, the structure classification would change to 'public'.
- SoftBank is categorised here as a strategic/corporate investor rather than a PE firm in the traditional buyout sense, though it operates both VC and PE vehicles.
- All percentage figures are based on the October 2025 recapitalisation disclosure; the March 2026 $122 billion round will have caused dilution, and updated percentages have not been officially published.