Polymarket traders now assign 80% odds that OpenAI will reach a $1.5 trillion valuation at its IPO by the end of 2027, up from just 35% earlier this year. OpenAI raised funds in March 2026 at a post-money valuation of $852 billion before filing a confidential S-1 with the SEC on June 8, 2026. The company now generates approximately $25 billion in annualized revenue from ChatGPT subscriptions and enterprise API contracts. A $1.5 trillion valuation would represent a price-to-sales multiple of 60 times, which assumes continued growth and a resolution of OpenAI’s current GAAP losses. OpenAI restructured its governance in 2025 from a capped-profit model to a public benefit corporation to meet public market requirements.
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