OpenAI Closes a $122 Billion Round at an $852 Billion Valuation
The largest private funding round ever raised valued the company at $852 billion in late March, as annualized revenue doubled to roughly $40 billion and enterprise sales approached parity with consumer.
OpenAI closed a funding round of roughly $122 billion in late March, valuing the company at about $852 billion — the largest private financing ever completed, by a wide margin.
The company's annualized revenue reached approximately $40 billion by mid-year, roughly double the level at the end of 2025. Enterprise sales now account for more than 40% of the mix and are on track to reach parity with consumer revenue.
Why the numbers are this large
Frontier AI development has a cost structure unlike anything in software. Training runs consume compute at a scale measured in gigawatt-hours. Serving models to hundreds of millions of users consumes more. And the hardware required is priced by a supplier whose own margins are the subject of a separate national conversation.
A company in this position raises capital not because it wants optionality but because the next model requires it. That dynamic is what has driven private rounds to sizes that would have been considered implausible for an initial public offering five years ago.
The competitive picture
The valuation was the highest in the private market for about eight weeks. In late May, Anthropic closed a round at a post-money valuation near $965 billion on a revenue run rate that had grown faster.
Both companies are competing for the same three scarce inputs: researchers, compute and enterprise contracts. The third is where the economics are decided, because business customers pay for reliability and integration rather than for benchmark scores.
The public-market question
At these valuations, the private funding market is doing a job public markets used to do — supplying capital at a scale that would once have required a listing. That has consequences for who participates in the returns, and it concentrates enormous exposure in sovereign funds, crossover investors and a small number of strategic partners.
It has also raised a governance question that is becoming harder to postpone: companies of this size and consequence operating outside the disclosure regime that applies to public companies of a fraction of their scale.
