OpenAI’s September 2026 decision to defer its IPO until 2027, driven by AI safety and alignment priorities as stated by CEO Sam Altman, has shaped trader sentiment around the company’s closing market capitalization. The firm is advancing a pre-IPO bridge round targeting at least $30 billion at roughly $1.4 trillion valuation, following its March 2026 raise at $852 billion post-money. Surging revenue, now approaching a $70 billion annualized run-rate with enterprise sales more than doubling since July, underpins the 55.5% implied probability for a 1.5T+ outcome at listing. The 23.8% chance assigned to no IPO by December 31, 2027, reflects ongoing safety hurdles and execution risks, while narrower bands capture valuation uncertainty tied to market conditions and regulatory developments.