OpenAI's $852B valuation, explained
How OpenAI got to an $852B valuation, what its ~$25B revenue run-rate implies, and why the multiple is the most debated number in private markets.
OpenAI closed its March 2026 round at an $852 billion post-money valuation, the largest single private financing ever recorded. The number is large enough to put OpenAI among the most valuable companies on earth, public or private. It is also the most argued-over figure in the market. Here is how it was built, and what an investor should actually weigh.
Key points
- The $122 billion round closed on March 31, 2026 at an $852B post-money valuation, co-led by SoftBank.
- Annualized revenue reached roughly $25B in early 2026, up from about $20B at the end of 2025.
- That puts the headline multiple near 34 times run-rate revenue, far above public peers like Microsoft and Alphabet.
- A confidential S-1 was filed on June 8, 2026, but the public filing is where the math gets tested.
How the number was built
The round resolves into a few large commitments on different terms. Strategic partners Amazon, Nvidia, and Microsoft participated alongside financial investors including Andreessen Horowitz, D.E. Shaw Ventures, MGX, TPG, and T. Rowe Price-advised accounts. A meaningful share of the headline figure is contingent rather than cash on day one, which is normal for financings of this size but matters when you compare it to a clean public raise.
The valuation also followed a 2025 recapitalization that converted the for-profit into OpenAI Group PBC, controlled by the nonprofit OpenAI Foundation. Microsoft’s stake was aligned to the new structure at roughly 27 percent. That ownership detail is the single most important reason Microsoft trades as the closest public proxy for OpenAI.
What the multiple implies
At about $25B of annualized revenue, an $852B valuation works out to roughly 34 times run-rate. Public software leaders trade closer to 10 to 11 times revenue today. To grow into the price at a public-style multiple, OpenAI would need revenue several times higher than today while moving toward profitability.
Revenue growth has been genuinely fast: from a $2B run-rate in 2023 to about $25B in early 2026. The open question is margin. Inference costs are heavy, the company is not cash-flow positive, and projected burn runs into the tens of billions per year. Bulls argue the consumer franchise and enterprise pipeline justify a premium. Skeptics note the multiple prices in an outcome that has not been proven yet.
Why the public S-1 matters
Everything above rests on reported figures and investor decks rather than audited statements. The confidential S-1 starts the SEC review clock, but the public S-1 is where audited revenue, gross margin, losses, customer concentration, and governance terms finally appear. Reports suggest the listing may slip to 2027 as the company holds out for a valuation above $1 trillion.
Until then, the $852B mark is a private-market data point, not a price you can trade. For exposure today, the most direct routes are public proxies like Microsoft and Nvidia. See our how to invest guide and the live valuation page for the latest figures.