Price history
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Description
OpenAI’s IPO closing market cap on the first trading day will determine the outcome brackets from <500B up to 1.5T+, with a fallback No IPO by December 31, 2026 if no IPO occurs. Market caps are based on the closing price and outstanding shares as listed on the primary exchange’s official page, or a reliable source if needed; ties resolve to the higher bracket. The event resolves only after the first trading day’s closing price is known or, if no IPO, by the end of 2026, per rules.
Event stats
24h volume
Total volume
Liquidity
Markets
7
Market highlights
Top market
24h gainer
24h loser
Highest volume
Top market
24h gainer
24h loser
Highest volume
Related events
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Markets
Outcome | Odds | Spread | 24h Change | 24h Volume | Total Volume | Liquidity | |
|---|---|---|---|---|---|---|---|
| <500B | — | — | — | — | — | — | |
| 500–750B | — | — | — | — | — | — | |
| 750B–1T | — | — | — | — | — | — | |
| 1T–1.25T | — | — | — | — | — | — | |
| 1.25T–1.5T | — | — | — | — | — | — | |
| 1.5T+ | — | — | — | — | — | — | |
| No IPO by December 31, 2026 | — | — | — | — | — | — |
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, 2026, 11:59 PM ET, the market will resolve to "No IPO by December 31, 2026". 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.