OpenAI Confidentially Files for September IPO at ~$852B Valuation
What Happened
Reports indicate OpenAI has submitted a confidential prospectus aiming for a September 2026 public offering at an approximate $852B valuation. The filing slots between SpaceX's planned June listing and Anthropic's expected October debut, creating an unprecedented three-month window in which the largest frontier-AI players all hit public markets.
My Take
Three frontier AI IPOs in six months will create a real-time market test of how investors value the category — and the comparables are going to be brutal. SpaceX has Starlink cash flow, Anthropic has profitability, OpenAI has ChatGPT consumer scale but the messiest cap table and governance story in tech. If OpenAI prices well, the bubble talk fades; if it stumbles, Anthropic's October window slams shut and the whole capex thesis wobbles. This is the most consequential IPO sequence since the dotcom era.
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