OpenAI’s decision to delay any public listing until 2027, driven by CEO Sam Altman’s September emphasis on prioritizing AI safety work ahead of an IPO, remains the dominant factor shaping trader views on the timing. The company confidentially filed its S-1 in June and has since accelerated a private round—now scaled to roughly $20 billion at a $1.25 trillion valuation—to fund infrastructure for its large language models and strengthen its balance sheet before market conditions potentially worsen. Rival Anthropic’s mid-November debut could test AI investor appetite and influence OpenAI’s path, while revenue momentum from recent model releases supports long-term positioning but has not altered the explicit 2026 exclusion.