OpenAI reportedly discussed participation in a potential upcoming IPO with Citi and JPMorgan, adding to earlier reports that Goldman Sachs and Morgan Stanley were assisting with confidential IPO filing preparations. The new report says listing preparations could begin as early as September, providing a more defined possible timeline than previously disclosed. On Polymarket, odds of an OpenAI listing stood at 29% by the end of September and 70% by year-end, reflecting elevated market expectations, though no formal IPO, valuation, deal size, underwriting mandates, or listing venue were confirmed.