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Techcloses in 15mo

Will Anthropic or OpenAI IPO first?

This market will resolve to "Anthropic" if Anthropic completes an Initial Public Offering (IPO) before OpenAI completes an IPO by December 31, 2027, 11:59 PM ET, as confirmed by official company announcements and credible news sources. This market will resolve to "OpenAI" if OpenAI completes an Initial Public Offerin…

As of 12 September 2026, "Anthropic" leads at 93% implied probability (-2.8pp over the last 24h). The biggest 24h move is "OpenAI", from 4% to 7%. The event has traded $361.1K in total ($20.7K in the last 24h) with $35.7K of liquidity across 1 market. Trading is due to close on 31 December 2027.

24h volume
$20.7K
Total volume
$361.1K
Liquidity
$35.7K
Markets
1
31 Dec 2027
sam altmanOpenAIBusinessIPOsIPOFinanceAIClaude 5OpenAI IPOAnthropic IPOAnthropic

Chart, demo trading & order book

MarketWill Anthropic or OpenAI IPO first?
Anthropic93.5¢
24h Chg-2.8pp
Mkt Vol$361.1K
live
Order bookAnthropic
Market tradeslive · 6s
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Markets and probabilities

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How to read

The percentage is the implied probability of the outcome, between 0% and 100%. For mutually-exclusive markets the sum trends to 100% (no vig). The ▲/▼ arrow shows the change over the selected window (1h/24h/7d/30d) in percentage points (pp). Click a market to see its top holders (with average entry price and position change) and the latest trades.

Will Anthropic or OpenAI IPO first? — Polymarket implied odds · Polytracker