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OpenAI IPO Closing Market Cap

icon for OpenAI IPO Closing Market Cap

OpenAI IPO Closing Market Cap

1.5T+ 41.8%

1.25T–1.5T 20%

1T–1.25T 19.3%

No IPO by December 31, 2027 13.4%

Polymarket

$115,993 Vol.

1.5T+ 41.8%

1.25T–1.5T 20%

1T–1.25T 19.3%

No IPO by December 31, 2027 13.4%

Polymarket

$115,993 Vol.

<500B

$8,567 Vol.

<1%

500–750B

$11,074 Vol.

1%

750B–1T

$12,229 Vol.

8%

1T–1.25T

$17,659 Vol.

19%

1.25T–1.5T

$10,900 Vol.

20%

1.5T+

$30,356 Vol.

42%

No IPO by December 31, 2027

$25,210 Vol.

13%

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.OpenAI’s $40 billion annualized revenue run rate—roughly double its December 2025 level—combined with the $122 billion March 2026 funding round that set an $852 billion private valuation, underpins trader consensus for a 2027 IPO at elevated levels. CEO Sam Altman’s reported insistence on a $1 trillion-plus target, reinforced by recent CFO comments that timing could accelerate with sustained growth, has shifted focus from a possible late-2026 listing toward a later debut that could command premium public-market multiples. Heavy compute spending and operating losses remain offset by massive committed capital and strategic backing from Nvidia, Amazon, and SoftBank. Market-implied odds of 41.8% for a closing market cap above $1.5 trillion reflect these expansion dynamics and the precedent of AI peers trading at substantial premiums to private marks, while the 13.4% probability assigned to no IPO by end-2027 signals limited near-term resolution risk.

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.
Volume
$115,993
End Date
Dec 31, 2027
Market Opened
Feb 6, 2026, 6:07 PM ET
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.
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.OpenAI’s $40 billion annualized revenue run rate—roughly double its December 2025 level—combined with the $122 billion March 2026 funding round that set an $852 billion private valuation, underpins trader consensus for a 2027 IPO at elevated levels. CEO Sam Altman’s reported insistence on a $1 trillion-plus target, reinforced by recent CFO comments that timing could accelerate with sustained growth, has shifted focus from a possible late-2026 listing toward a later debut that could command premium public-market multiples. Heavy compute spending and operating losses remain offset by massive committed capital and strategic backing from Nvidia, Amazon, and SoftBank. Market-implied odds of 41.8% for a closing market cap above $1.5 trillion reflect these expansion dynamics and the precedent of AI peers trading at substantial premiums to private marks, while the 13.4% probability assigned to no IPO by end-2027 signals limited near-term resolution risk.

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.
Volume
$115,993
End Date
Dec 31, 2027
Market Opened
Feb 6, 2026, 6:07 PM ET
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.

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Frequently Asked Questions

"OpenAI IPO Closing Market Cap" is a prediction market on Polymarket with 7 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "1.5T+" at 42%, followed by "1.25T–1.5T" at 20%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 42¢ implies that the market collectively assigns a 42% 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" has generated $116K in total trading volume since the market launched on Feb 6, 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," browse the 7 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" is "1.5T+" at 42%, meaning the market assigns a 42% chance to that outcome. The next closest outcome is "1.25T–1.5T" at 20%. 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" 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.