OpenAI filed its S-1 confidentially with the SEC on May 22, 2026. Goldman Sachs and Morgan Stanley are leading the offering. Q4 2026 is the target window for a public listing at a valuation the reporting places between $852 billion and $1 trillion.

The company has 50 million consumer subscribers and 9 million business users. It hit a $25 billion annualized revenue run rate by March 2026. Enterprise contracts account for more than 40% of revenue. Those are real numbers and they reflect a real business.

Also real: per pre-IPO financial reporting, OpenAI ran a -122% non-GAAP operating margin in Q1 2026. For every dollar it earned, it lost $1.22. Inference compute costs are projected to reach $14.1 billion in 2026. Cash-flow breakeven is not expected before 2029.

A $1 trillion valuation on that math is an audacious bet. It is also, in a specific way I want to think through, a bet that's coherent — if some things go right.

Source spread

• CNBC — hype. Frames the filing as a historic milestone; leads with the $1T target and the banks involved.
• Quartz — skeptic. Notes the confidential structure keeps the actual numbers sealed; raises questions about how investors price something they can't read yet.
• Fortune — skeptic. Lists the unanswered questions the S-1 will eventually have to address.
• Sacra — builder. Data-forward breakdown of revenue composition, enterprise share, and growth trajectory.

The math that has to work out

The $1T valuation is not irrational on a 7-10 year basis. Here's the version where it makes sense.

Revenue is growing fast — from roughly $3B ARR in early 2023 to $25B ARR by March 2026. That's consistent, compound growth. If it sustains at even 50% annually for another two years, you're at $55B ARR. At 25x ARR for a dominant platform company with durable enterprise relationships, that's a $1.4T market cap. Fine, on paper.

The problem is the bridge between the revenue line and the margin line. At $14.1B in projected 2026 compute costs against $25B in revenue, gross margins are somewhere in the 30-35% range. Software companies that trade at $1T need gross margins above 70%, eventually. Getting there requires inference costs to fall as hardware matures (possible, 5-year view), or prices to go up (directly affects builders), or the mix to shift decisively toward high-margin enterprise. Probably all three, probably in that order.

That's a coherent thesis. Each part has to work. At once. On schedule.

What's genuinely strong, and what's uncomfortable

The case for the valuation

• Revenue growth is consistent — $3B to $25B ARR in roughly 30 months is not luck, it's compounding distribution
• Enterprise at 40%+ of revenue is the margin-improvement story, and enterprise is the segment growing fastest
• The API is genuinely sticky at scale: 15 billion tokens per minute through OpenAI's infrastructure is hard to replicate quickly
• If inference hardware costs fall 50% by 2028-29 (plausible, given the GB200 and Blackwell roadmap), the margin picture changes materially

The case for caution

• -122% operating margin means the company needs the world to cooperate on multiple variables simultaneously — hardware, pricing, and competitive position all have to move in the right direction
• The S-1 is sealed until roughly 15 days before the roadshow — investors bidding at $1T right now are pricing on estimates and prior reporting, not audited financials
• Compute costs at $14.1B/year are likely to grow with usage before they fall — the next hardware generation is not here yet
• Anthropic, Google Gemini, and capable open-weight models all create pricing pressure from below; OpenAI cannot raise API prices as freely as it could 18 months ago

Further reading

• CNBC — OpenAI to confidentially file for IPO as soon as Friday — primary news report on the filing
• Quartz — OpenAI confidentially filing for IPO — skeptic framing on the confidential structure
• Fortune — The big questions OpenAI's trillion-dollar IPO filing may finally answer — what the disclosure will need to address
• Sacra — OpenAI revenue, valuation & funding — best independent financial picture available pre-IPO
• RoboRhythms — OpenAI Just Filed for IPO and the 2026 Math Is Brutal — names the operating margin problem directly