OpenAI Files for IPO: What We Know About the S-1, Valuation, and Timeline
OpenAI reportedly filed confidentially in June and its public S-1 is expected mid-to-late August, with a listing possibly by mid-September at a $1T+ valuation. What we know.
OpenAI Files for IPO: What We Know About the S-1, Valuation, and Timeline
OpenAI Files for IPO: What We Know About the S-1, Valuation, and Timeline
OpenAI is moving toward one of the largest technology IPOs ever. Here is a factual rundown of where things stand as of mid-August 2026 — and what is still unconfirmed.
The filing
OpenAI reportedly completed a confidential S-1 filing with the SEC on June 8, 2026. A confidential filing lets a company begin the IPO process privately; the public prospectus is expected to appear on SEC EDGAR in mid-to-late August 2026, which would be the first time OpenAI's full financials are disclosed. As of early August, that public S-1 had not yet posted.
Valuation
OpenAI carries a reported ~$852 billion valuation as of August 2026, following a roughly $7 billion employee tender offer. Reports suggest a public listing could target a valuation above $1 trillion, though no offering price, share count, exchange, or ticker has been set. For context, rival Anthropic reportedly reached a ~$965B private valuation earlier in the year.
Timeline
No listing date is confirmed. Based on current reporting, the earliest realistic window is a public filing in late August and a listing around mid-September 2026 — but IPO timelines slip routinely, and OpenAI has not committed to dates.
Why it matters
- First look at the financials. The public S-1 will reveal OpenAI's revenue, losses, compute costs, and its relationship with Microsoft — numbers the market has only guessed at.
- A milestone for the AI market. A trillion-dollar-scale AI IPO would be a signal of how public investors value the sector, and a benchmark for the next wave of AI companies weighing listings.
- Product stakes. OpenAI's consumer product, ChatGPT, reportedly crossed ~1 billion weekly active users this month — the scale story underpinning the valuation.
What is still unknown
Offering price, number of shares, the exchange, the ticker, the exact timeline, and how much of the financial picture the S-1 will reveal. Treat every figure here as reported and provisional until the official prospectus posts on EDGAR.
This is a developing story based on third-party reporting; we will update as the official S-1 is published. Nothing here is investment advice.