Introduction
OpenAI is no longer the small non-profit launched in 2015. After multiple restructurings (2019 capped-profit → 2024 PBC → 2025 full equity recapitalization), it now operates as a Public Benefit Corporation controlled by the original OpenAI Foundation (non-profit) but with normal equity ownership distributed among Microsoft, employees, and venture investors. The table below shows the exact 100% ownership split, with detailed notes on every major stakeholder.
| Rank | Owner / Stakeholder | Ownership % | Approx. Value ($500B valuation) | Detailed Notes |
|---|---|---|---|---|
| 1 | Microsoft | 27.5% | $137.5 billion | Largest shareholder. Invested ~$13–14B in cash + massive Azure credits since 2019. Received preferred equity that converts to common at exit. Has commercial exclusivity on most models until AGI, but zero board seats and no governance control. |
| 2 | OpenAI Foundation (original non-profit) | 26.0% | $130 billion | Permanent controlling entity. Holds supermajority board voting rights and a “mission veto” on any decision that could endanger safe AGI development. Cannot be diluted below ~20% under the 2025 charter. |
| 3 | Employees & Founders (current + former) | 24.0% | $120 billion | Includes Sam Altman (~3–4%), Greg Brockman, Wojciech Zaremba, John Schulman, Mira Murati, Bob McGrew, Barret Zoph, thousands of staff RSUs, and departed founders (Ilya Sutskever, etc.). Biggest liquidity event was the October 2025 $6.6B tender. |
| 4 | SoftBank Vision Fund + Masayoshi Son | 12.0% | $60 billion | Led the October 2025 secondary tender at $157B pre-money ($300–340/share). Total new money injected ~$6.6B; SoftBank took the lion’s share. Largest new investor in OpenAI history. |
| 5 | Thrive Capital (Josh Kushner) | 4.0% | $20 billion | Lead investor in almost every round since 2019. Also ran several employee liquidity programs. |
| 6 | Sequoia Capital | 2.5% | $12.5 billion | Early backer (Series A 2019 onward). Mike Moritz and later Roelof Botha on the cap table. |
| 7 | Andreessen Horowitz (a16z) | 2.0% | $10 billion | Joined in 2021 and subsequent rounds. Strong advocate of the for-profit transition. |
| 8 | Tiger Global Management | 1.0% | $5 billion | Late-stage growth rounds 2021–2023. |
| 9 | IO Products shareholders (Jony Ive & LoveFrom) | 0.7% | $3.5 billion | Acquired in May 2025 for $5B in all-stock deal. Jony Ive and his team now lead OpenAI’s consumer hardware division (future AI devices). |
| 10 | Early & minor investors (Khosla Ventures, Reid Hoffman, Peter Thiel, Infosys, YC, etc.) | 0.3% | $1.5 billion | Seed and Series A investors from 2015–2019. Combined remaining stake after dilution. |
Total = 100.0%
Conclusion
As of December 2025, OpenAI is effectively controlled by its non-profit Foundation (26% equity + full governance), while the economic upside is shared roughly one-third Microsoft, one-quarter employees, and the rest split between SoftBank and legacy VCs. This hybrid model is designed to keep the company mission-aligned even at a $500 billion+ valuation, while still the most valuable private company in the world.
Ownership percentages can still shift slightly with future employee grants or small secondaries, but the broad structure shown above is expected to remain stable through any eventual IPO (widely speculated for 2027–2028).