Bloomberg's May 29, 2026 report directly supports that OpenAI discussed IPO participation with Citigroup and JPMorgan. Multiple secondary outlets (Stocktwits/Yahoo, CryptoBriefing) corroborate the bank lineup and a September 2026 listing target. Polymarket odds align with the claim's reference to prediction markets indicating higher chances by year-end. The only minor nuance: 'listing preparations possibly starting in September' is slightly inaccurate—September is the targeted listing month, with confidential filing expected within weeks of the report—but the core claim is well supported.