← Polymarket

OpenAI IPO Closing Market Cap

Openone winner

Selected outcome

No IPO by December 31, 2026

96%

No IPO by December 31, 2026 · 96%

Stored quote · checking the venue

Scheduled end
Dec 31, 2026 ET

Price

Loading price history.

Markets

  • <500B

    Will OpenAI’s market cap be less than $500B at market close on IPO day?

    1%

    Open · $104 24h · $324k vol

    Bid 0.6¢ · Ask 1.2¢

    Open full market view →
  • 500–750B

    Will OpenAI’s market cap be between $500B and $750B at market close on IPO day?

    <1%

    Open · $59 24h · $176k vol

    Bid 0.2¢ · Ask 0.6¢

    Open full market view →
  • 750B–1T

    Will OpenAI’s market cap be between $750B and $1T at market close on IPO day?

    1%

    Open · $90 24h · $187k vol

    Bid 0.5¢ · Ask 0.7¢

    Open full market view →
  • 1T–1.25T

    Will OpenAI’s market cap be between $1T and $1.25T at market close on IPO day?

    <1%

    Open · $181 24h · $228k vol

    Bid 0.3¢ · Ask 0.5¢

    Open full market view →
  • 1.25T–1.5T

    Will OpenAI’s market cap be between $1.25T and $1.5T at market close on IPO day?

    <1%

    Open · $103 24h · $536k vol

    Bid 0.2¢ · Ask 0.5¢

    Open full market view →
  • 1.5T+

    Will OpenAI’s market cap be $1.5T or greater at market close on IPO day?

    1%

    Open · $102 24h · $163k vol

    Bid 0.8¢ · Ask 1.1¢

    Open full market view →
  • No IPO by December 31, 2026

    Will OpenAI not IPO by December 31, 2026?

    96%

    Open · $9 24h · $823k vol

    Bid 96.1¢ · Ask 96.4¢

    Open full market view →
Event statistics
24h vol
$646
Volume
$2.4M
Liquidity
$175k
Open int.
—

How this resolves

One winner.

Scheduled end
Dec 31, 2026 ET
  1. Trading
  2. Closed
  3. In review
  4. Resolved
Rules text

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.

View on Polymarket