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icon for OpenAI IPO closing market cap above ___ ?
Finance·IPOs

OpenAI IPO closing market cap above ___ ?

icon for OpenAI IPO closing market cap above ___ ?
Finance·IPOs

OpenAI IPO closing market cap above ___ ?

Polymarket

$1,541,475 Vol.

Polymarket

$1,541,475 Vol.

$800B

$115,897 Vol.

82%

$1T

$1,052,364 Vol.

79%

$1.2T

$250,252 Vol.

72%

$1.4T

$70,870 Vol.

65%

$1.6T

$52,092 Vol.

65%

This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. 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.OpenAI's confidential IPO filing in June 2026 and subsequent shift to a 2027 timeline, driven by CEO Sam Altman's emphasis on AI safety priorities over near-term listing, represent the core factor shaping market-implied odds for its closing market capitalization. The company last raised capital at an $852 billion post-money valuation in March 2026 and has explored a potential pre-IPO round near $1.2 trillion amid accelerating revenue, with annualized run rates exceeding $40 billion following GPT-5.6 and Astra model releases. Traders weigh these fundamentals against broader AI equity multiples, competitive pressures from Anthropic's higher valuation, and historical post-IPO performance of peers like SpaceX, while monitoring upcoming earnings trends and regulatory developments for shifts in sentiment.

This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”.

If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”.

Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day.

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.This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. 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.
Volume
$1,541,475
End Date
Jan 1, 2028
Market Opened
Jan 30, 2026, 7:25 PM ET

Resolver

0x65070BE91...
This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. 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.OpenAI's confidential IPO filing in June 2026 and subsequent shift to a 2027 timeline, driven by CEO Sam Altman's emphasis on AI safety priorities over near-term listing, represent the core factor shaping market-implied odds for its closing market capitalization. The company last raised capital at an $852 billion post-money valuation in March 2026 and has explored a potential pre-IPO round near $1.2 trillion amid accelerating revenue, with annualized run rates exceeding $40 billion following GPT-5.6 and Astra model releases. Traders weigh these fundamentals against broader AI equity multiples, competitive pressures from Anthropic's higher valuation, and historical post-IPO performance of peers like SpaceX, while monitoring upcoming earnings trends and regulatory developments for shifts in sentiment.

This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”.

If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”.

Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day.

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.This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. 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.
Volume
$1,541,475
End Date
Jan 1, 2028
Market Opened
Jan 30, 2026, 7:25 PM ET

Resolver

0x65070BE91...

Related

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Frequently Asked Questions

"OpenAI IPO closing market cap above ___ ?" is a prediction market on Polymarket with 5 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "$800B" at 82%, followed by "$1T" at 79%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 82¢ implies that the market collectively assigns a 82% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "OpenAI IPO closing market cap above ___ ?" has generated $1.5 million in total trading volume since the market launched on Jan 30, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "OpenAI IPO closing market cap above ___ ?," browse the 5 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "OpenAI IPO closing market cap above ___ ?" is "$800B" at 82%, meaning the market assigns a 82% chance to that outcome. The next closest outcome is "$1T" at 79%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "OpenAI IPO closing market cap above ___ ?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.