If OpenAI confirms an IPO before Sep 1, 2026, then the market resolves to Yes. An IPO is confirmed if 1) the SEC declares the company's Form S-1 effective OR 2) the IPO is priced OR 3) a securities exchange has assigned a ticker to it. As long as any of those events occur, the market will immediately resolve to Yes, even if the company does not start trading until after Sep 1, 2026. This market will close and expire early if the event occurs.