OpenAI IPO Closing market cap
Live prediction market odds for OpenAI IPO Closing market cap. Compare prices across Polymarket and Predict.fun.
Traders give No IPO by December 31, 2026 about a 96.8% chance. <500B follows at 0.8%, 750B–1T follows at 0.8%, and 1T–1.25T follows at 0.7%. Compare prices from Polymarket and Predict.fun. The largest cross-platform price difference is 0.5 percentage points.
Polymarket
Predict.funPolymarketPredict.funOfficial settlement criteria, resolution sources, and edge cases across Opinion and Polymarket and Predict.fun.
OpinionThis 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.
PolymarketThis 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.
Predict.funThis 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.
The market resolves based on the final market capitalization of OpenAI as reported at the close of its IPO on January 1, 2027. This figure will determine the outcome of the prediction market.
The closing market cap for OpenAI's IPO will be determined on January 1, 2027. All trades and predictions will be evaluated based on the valuation reported at that time.
Polymarket and PredictIt are currently offering prediction markets on the OpenAI IPO Closing market cap. These platforms provide real-time odds and insights into the expected valuation.
The outcomes listed above show how traders are pricing this question. Compare outcome prices from Polymarket, Predict.fun in one place. Each price reflects the market’s implied probability, not a guaranteed result.
The latest available prices are No IPO by December 31, 2026: 97.0¢ on Polymarket, 96.6¢ on Predict.fun; <500B: 0.8¢ on Polymarket; 750B–1T: 0.8¢ on Polymarket; 1T–1.25T: 0.7¢ on Polymarket. Prices are quoted in cents per $1 share. Check the venue for executable prices and available liquidity.
