OpenAI at $730 Billion: The Fastest Path to an IPO in Tech History

Roughly three years ago, OpenAI was a nonprofit research lab that most people outside Silicon Valley had never heard of. Today it is worth more than ExxonMobil, more than Visa, and is closing in on the kind of valuation that once took companies decades to reach. The numbers are so large they barely feel real, but they are real, and the pace at which they keep changing makes this one of the most important business stories of the decade.

How You Get to $730 Billion

On February 27, 2026, OpenAI closed what Bloomberg confirmed as the largest private financing round in history: $110 billion, at a pre-money valuation of $730 billion. The headline investors were Amazon ($50 billion), Nvidia ($30 billion), and SoftBank ($30 billion). That is not a typo. Three of the most powerful technology and finance players on earth each committed tens of billions in a single round.

The Amazon piece is particularly significant. Of that $50 billion, $35 billion is contingent on OpenAI hitting certain performance and partnership milestones. In exchange, Amazon gets expanded distribution of OpenAI's enterprise tools directly through AWS, and OpenAI gets to lean on Amazon's Trainium chips for two gigawatts of compute. The Nvidia deal similarly locks in dedicated inference capacity of three gigawatts, plus two gigawatts of training on Nvidia's Vera Rubin systems. These are not just financial bets. They are deep infrastructure commitments that make unwinding extremely expensive for both sides.

Revenue That Rewrites the Record Books

The funding would be dramatic on its own, but what makes the OpenAI story genuinely historic is what is happening on the revenue side. By February 2026, OpenAI crossed $25 billion in annualized run-rate revenue. No software company in history has scaled from zero to $25 billion this quickly. To put it in perspective, Salesforce took over a decade to reach $4 billion in annual recurring revenue. OpenAI got there in under two years.

The growth rate is equally staggering. OpenAI has been growing roughly three times per year since 2024, a clip that exceeds even Google's trajectory when it first hit $10 billion. Internal projections suggest revenues could reach $100 billion by 2028, which would represent a 4x jump from where the company is today. Whether or not those targets hold, the underlying momentum is undeniable: ChatGPT crossed 900 million weekly active users by late February 2026, and the enterprise side of the business is accelerating sharply.

The Private Equity Gambit

Just as the $110 billion round was settling, a new development emerged this week that adds another layer to the story. OpenAI is in advanced talks to form a $10 billion joint venture with major private equity firms, specifically TPG, Bain Capital, Brookfield Asset Management, and Advent International. Under the structure being discussed, the PE firms would invest roughly $4 billion at a $10 billion valuation for the venture entity, with TPG acting as anchor investor and all four firms securing board seats.

The strategic logic is clever. Private equity firms collectively control enormous portfolios of operating companies, and those companies need AI infrastructure. By partnering with the PE firms rather than just selling to them, OpenAI creates a direct distribution channel into thousands of businesses that might otherwise turn to a competitor. It is also worth noting that Anthropic is pursuing nearly identical deals with its own set of PE partners, which tells you this is less about any one company's genius and more about a structural shift in how AI gets adopted at scale.

The IPO That Everyone Is Watching

All of this activity is clearly setting up for a public offering. Internal projections, widely reported by Reuters and Bloomberg, point to a filing in the second half of 2026, with a potential listing in 2027 at a valuation of up to $1 trillion. If that target holds, it would be the largest IPO in history, eclipsing Saudi Aramco's 2019 debut.

The path there is not without risk. OpenAI is still burning cash at an enormous rate as it scales compute infrastructure. The company spent nearly $9 billion on compute in 2025 alone, and those costs are not going down. Competitors including Anthropic, Google DeepMind, and a resurgent Meta are each spending aggressively. And the regulatory picture, while friendlier in the United States under the current administration, remains complicated in Europe, where antitrust scrutiny of AI partnerships is intensifying.

Still, the momentum is extraordinary. The $110 billion round gives OpenAI the runway to absorb those costs, the Amazon and Nvidia partnerships give it infrastructure stability, and the PE joint venture gives it a go-to-market machine for enterprise. Each piece reinforces the others.

What a $1 Trillion IPO Would Mean

If OpenAI does list publicly at or near $1 trillion, it would reshape the S&P 500 in ways that ripple outward. At $1 trillion in market cap, OpenAI would be the fifth or sixth largest company in the index depending on where the others sit. The inflows into index funds alone would force trillions of dollars of reallocation.

There is also the symbolic dimension. A $1 trillion public debut for a company that was a nonprofit eight years ago would mark the official moment when artificial intelligence stopped being a technology category and became the defining economic force of the era. Whether you think that is thrilling or terrifying probably says something about where you sit.

What to Watch

The immediate thing to track is whether the private equity joint venture closes and on what terms. A completed deal would be a strong signal that enterprise distribution is locking in ahead of an IPO. Watch for announcements from TPG or Bain Capital confirming their participation.

Longer term, the key question is whether OpenAI's revenue growth can stay close to its current trajectory as competition intensifies. The $100 billion by 2028 projection is achievable, but it requires continued dominance in a market where Google, Anthropic, and Meta are each spending at a scale that would have seemed impossible three years ago. The race is very much still on.