OpenAI's $852B Valuation, Explained (2026 Update)
OpenAI is valued at $852B after its March 2026 round. How it was built, why the revenue multiple fell from ~34x to ~12x, and what is still unknown.
Updated November 8, 2026 with revenue figures through September 2026.
OpenAI closed its March 2026 round at an $852 billion post-money valuation, the largest single private financing on record. It is still the last valuation set in a closed deal. What has changed since is the revenue underneath it: OpenAI’s annualized run-rate has nearly tripled, so the same price now tells a different story. Here is how the number was built, what it implies today, and what it still leaves open.
Key points
- The $122 billion round closed on March 31, 2026 at an $852B post-money valuation, co-led by SoftBank.
- Annualized revenue was about $25B in February 2026, around the time the round was priced, and approached $70B at the end of September, according to Axios figures reported by Bloomberg.
- On the same $852B, the revenue multiple has fallen from about 34 times run-rate to about 12 times.
- OpenAI is reported to be negotiating a new round at a higher valuation, but none has closed. Its revenue figures are not audited until a public S-1.
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. At least $35B of the headline figure is contingent rather than cash on day one, Bloomberg reported. That is normal for financings of this size, but it matters when you compare the round with 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 main reason Microsoft is seen as the closest listed proxy for OpenAI.
From 34 times revenue to 12 times
The $852B price has stayed fixed while the annualized revenue under it moved. The multiple is $852B divided by the run-rate:
| As of | Run-rate | Multiple |
|---|---|---|
| Feb 2026 | ~$25B | ~34x |
| End Jul 2026 | ~$40B | ~21x |
| End Sep 2026 | ~$70B | ~12x |
When this article was first published in June, the question was whether OpenAI could grow into its price. At about 34 times run-rate, the valuation assumed revenue several times higher than the company was earning, which put it far above the revenue multiples of listed software companies. Much of that growth has since arrived. At about 12 times, the price is carried mostly by revenue OpenAI reports now, not by revenue it still has to reach.
The comparison with its closest private rival has flipped too. On Sacra’s figures, Anthropic was valued at $965B on a $65B run-rate at the end of July, about 15 times. On the latest numbers, OpenAI is the one priced at the lower multiple of revenue.
What the lower multiple does not settle
A falling multiple on an old price does not make the company cheap. Three things limit what the 12x figure says:
- The price is from March. $852B is what investors agreed to seven months before the latest revenue figure. Bloomberg reported in September that OpenAI was seeking about $30B at roughly $1.4 trillion, and in October CNBC reported terms of up to $1.25 trillion before the new money, led by Coatue and UAE investors. That would be about 18 times the current run-rate. Until a round closes, $852B stays the last closed valuation.
- Run-rate is not annual revenue. A run-rate annualizes the most recent month. For a company growing this fast, it sits well above what was actually booked over the past twelve months. These figures also come from press reports of internal numbers, not from audited accounts.
- Revenue is not profit. A revenue multiple says nothing about margins. OpenAI cut API prices by more than half in September, which tends to raise volume and lower revenue per unit of compute. It has not published audited figures on gross margin or cash flow.
Why the public S-1 still matters
Everything above rests on reported figures and investor materials rather than audited statements. OpenAI confidentially filed a draft S-1 on June 8, 2026, which started the SEC review. Only the public S-1 shows audited revenue, gross margin, losses, customer concentration and governance terms. In September Sam Altman said OpenAI would not go public this year, and in November Greg Brockman said the company could be IPO-ready in 2027.
Until then, $852B is a private-market data point, not a price you can trade. OpenAI shares are not listed. Our investors page lists the listed companies with a stake in OpenAI or close ties to it, our how to buy guide covers what access exists today, and the valuation page carries the latest figures.
This is analysis, not investment advice. See our disclaimer.