OpenAI may reach a valuation above $1 trillion before public investors get a chance to buy its shares. With another private funding round under discussion and Sam Altman signaling that an IPO will wait, the company has given prediction markets little reason to expect a listing this year.
Polymarket puts the chance of an OpenAI IPO before the end of 2026 at roughly 5%. The more interesting question is becoming how far into 2027 investors might have to wait.
OpenAI IPO Launch Date Projection
Altman made the company’s current thinking clearer in a September 12 interview with Fortune. He said OpenAI would not go public in 2026, pointing to AI safety concerns and the work still ahead. His comments suggest that management sees more urgent priorities than getting shares onto an exchange.
The funding news adds another reason to believe OpenAI could take its time. The company has held early discussions about a private round that could value it above $1.2 trillion, following its $122 billion financing in March at an $852 billion valuation. A deal has not been completed.
If fresh funding comes through, it could give OpenAI more freedom to choose when it lists. The company would have another source of capital to support its expansion while it works through the issues Altman highlighted.
Altman’s comments already make a 2026 IPO look unlikely. Additional private money could also reduce the pressure to move quickly on an IPO once the calendar turns to 2027.
Polymarket puts an IPO by the end of March 2027 at about 25%, rising to roughly 57% by the end of June 2027. Those later markets have attracted very little trading, so the numbers deserve caution. Still, they frame the next question: will OpenAI arrive on the stock market in the first half of next year, or keep investors waiting longer?
The Trade
My favorite position is No on an OpenAI IPO by December 31, 2026, at 95.5 cents.
Altman has said an IPO will wait, and another private funding round could make that decision easier to stick with. For this position to lose, OpenAI would need to completely change course and complete a listing before the end of the year, very unlikely.
