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OpenAI IPO Closing Market Cap
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Choose a market to analyze 7 open questions · Evidence required
24h volume$284.6
Total volume$409.3K
Liquidity$113.4K
Event end date · UTCJan 1, 2028
Price history
Market probabilityLoading price history…
Polymarket · UTC
Sampled market observations, not AI forecasts. Lines connect available observations. Legend values are current provider quotes; chart points may be older.
Outcomes & resolution rules
7 marketsThese are market-implied probabilities, not AI forecasts. A displayed quote may differ from the price available for your order.
<500BAccepting ordersMarket odds0.85%
Will OpenAI’s market cap be less than $500B at market close on IPO day by December 31, 2027?
Yes0.85%Polymarket estimate
No99.2%Polymarket estimate
- Liquidity
- $12.8K
- Deadline · UTC
- Jan 1, 2028
- Yes bid / ask
- 0.7¢ / 1.0¢
- Trading fees
- Enabled · verify on Polymarket
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Resolution rules
This market will resolve based on OpenAI's market capitalization at the closing price on its first day of trading. If no IPO occurs by December 31, 2027, 11:59 PM ET, the market will resolve to "No IPO by December 31, 2027". Market capitalization expresses the monetary value of a company’s outstanding shares, stated in its pricing currency. It is calculated as the number of shares outstanding multiplied by the closing share price on the first trading day. If the relevant value falls exactly between two brackets, then this market will resolve to the higher range bracket. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In the event of an interruption in the course of the normal trading session on OpenAI’s first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.