OpenAI submitted a confidential draft S-1 to the Securities and Exchange Commission on Monday, disclosing the filing itself in a Rule 135 notice that read more like a shrug than a milestone. “we expect it to leak so we’re just announcing it,” the company said, with Goldman Sachs and Morgan Stanley leading the process, according to Bloomberg. At a post-money valuation of $852 billion, OpenAI would slot in around the 15th-largest company in the S&P 500, a ranking CFO Sarah Friar floated to the Associated Press back in April.
It’s the third major frontier-AI developer to file with the SEC in a week. Anthropic submitted its own confidential prospectus on June 1 at a $965 billion valuation, per The Washington Post. Bankers are simultaneously pitching SpaceX, freshly merged with xAI earlier this year, at $135 a share for a $75 billion raise, implying a roughly $1.77 trillion valuation. Bloomberg pegs the combined AI-related IPO pipeline at $3.6 trillion.
That number is the story. Three private companies, each individually larger than most national stock exchanges, are queuing up for public markets inside a single calendar week. The last time a single sector tried to absorb listings of this scale in this compressed a window was the 1999–2000 dot-com IPO surge, and the structural lesson there was about saturation, not skepticism: the market clears the first few names at headline multiples and then runs out of marginal buyers.
OpenAI’s own language hedges accordingly. The filing, the company said, preserves “things we want to do that are likely easier as a private company” while it “gives us the option to go public sooner if that ends up being best.” The Wall Street Journal, cited by the Post, has flagged a possible fall window. Friar called the exercise “good hygiene” in April, telling CNBC it was time for OpenAI to “look and feel and act” like a public company. Sam Altman, in a separate post Monday, framed the moment as a “third phase” and offered the broader read: “the economy is beginning to reshape around AI.”
The legal runway is also newly clear. Last year’s reorganization into a public benefit corporation survived a jury trial in May against co-founder Elon Musk, who’d sued to unwind it. ChatGPT now claims 900 million weekly active users, a distribution figure Google would’ve envied at the same age.
The competitive read is less triumphant. “OpenAI doesn’t have a lot of other places to look for the enormous capital required to support its costs,” Emarketer analyst Nate Elliott told Fortune, calling it a “precarious moment.” A confidential S-1 isn’t a victory lap. It’s a company telling its investors, and its rivals, that the private markets have finally run out of room.
Sources
- https://openai.com/index/openai-submits-confidential-s-1/
- https://www.bloomberg.com/news/articles/2026-06-08/openai-filed-confidentially-for-ipo-as-rivals-race-to-market
- https://www.cnbc.com/2026/06/08/openai-confidentially-files-for-ipo-prepping-wall-street-for-ai-debut.html
- https://fortune.com/2026/06/09/openai-files-confidential-s-1-sec-ipo/
- https://www.washingtonpost.com/business/2026/06/08/openai-ipo-chatgpt/e7573db2-6384-11f1-bdd4-805ebb99a693_story.html