OpenAI CEO Sam Altman’s September 12 statement ruling out a 2026 IPO, citing AI safety and alignment priorities, has anchored trader sentiment and lifted the probability of no listing by end-2027 to 21.1%. Strong revenue momentum—annualized run rates climbing above $40 billion and reportedly approaching $70 billion by late September—combined with ongoing talks for a $30 billion-plus bridge round at roughly $1.4 trillion valuation, underpins the 55.8% market-implied odds for a closing market cap above $1.5 trillion. These figures build on the March 2026 round at $852 billion post-money and reflect sustained investor appetite for OpenAI’s growth trajectory ahead of any 2027 listing. Key near-term catalysts include completion of the proposed private round and further updates on regulatory or safety milestones that could clarify the IPO timeline.