OpenAI files confidentially for an IPO, a week after Anthropic

On 8 June 2026, OpenAI posted on X that it had confidentially filed a draft S-1 — the first formal step toward a public listing, about a week after Anthropic filed its own (1 June, at a reported ~$965B). The filing is confidential, meaning the detailed financials stay private for now; that is standard SEC procedure. OpenAI's statement was unusually direct: 'We expect it to leak so we're just announcing it. We have not decided on timing yet; it may be a while.' Two of the most valuable private companies in AI are now in the queue within eight days of each other.

Reported target valuation: ~$730B–$850B, with some outlets reaching toward ~$1T. The range is wide because the filing is private and figures come from sources, not disclosures. The most defensible anchor: OpenAI's March 2026 funding round ($122B raised) valued it at $852B — and, per reporting, CFO Sarah Friar has said that would rank it among the 15 largest S&P 500 companies. Lead underwriters are reported as Goldman Sachs and Morgan Stanley; JPMorgan is also named. Debut window: Sept–Nov 2026, though 'may be a while' is the company's own language.