OpenAI CEO Sam Altman ruled out a 2026 IPO in mid-September statements, citing the need to prioritize AI safety and alignment work before scaling frontier large language models amid rapid capability gains. The company confidentially filed an S-1 in June but now views the current environment as ill-advised for public listing, with Altman emphasizing unacceptable risks even at low probabilities of catastrophic outcomes. Strong commercial momentum—annualized revenue approaching $70 billion after 70% growth since July—supports ongoing private fundraising talks targeting at least $30 billion at a $1.4 trillion valuation as bridge capital. Rival Anthropic has advanced further toward its own listing, adding competitive pressure, while upcoming developer updates and any regulatory clarity on AI governance could influence the 2027 timeline traders currently favor.