**Anthropic’s confidential SEC filing on June 1, 2026, ahead of OpenAI’s June 8 filing, has solidified trader consensus that it will reach public markets first, reflected in the 75.5% implied probability.** The company’s $65 billion Series H round at a $965 billion valuation in late May provided fresh capital and momentum, while earlier steps such as retaining Wilson Sonsini for IPO preparations positioned it to move faster. Reports indicate Anthropic is explicitly targeting a potential listing as soon as fall 2026, possibly October, giving it a timing edge. OpenAI has engaged banks and signaled flexibility for a September or late-2026 debut at up to $1 trillion valuation, but its later filing and statements about preferring to remain private longer have kept its odds lower. Key upcoming catalysts include any public S-1 disclosures or confirmed roadshow timelines that could shift the race, though current developments favor Anthropic’s lead in this closely watched AI IPO contest.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAnthropic
$159,534 Vol.
$159,534 Vol.
Dec 31, 2027
Anthropic
$159,534 Vol.
$159,534 Vol.
Dec 31, 2027
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 Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.**Anthropic’s confidential SEC filing on June 1, 2026, ahead of OpenAI’s June 8 filing, has solidified trader consensus that it will reach public markets first, reflected in the 75.5% implied probability.**
The company’s $65 billion Series H round at a $965 billion valuation in late May provided fresh capital and momentum, while earlier steps such as retaining Wilson Sonsini for IPO preparations positioned it to move faster. Reports indicate Anthropic is explicitly targeting a potential listing as soon as fall 2026, possibly October, giving it a timing edge.
OpenAI has engaged banks and signaled flexibility for a September or late-2026 debut at up to $1 trillion valuation, but its later filing and statements about preferring to remain private longer have kept its odds lower. Key upcoming catalysts include any public S-1 disclosures or confirmed roadshow timelines that could shift the race, though current developments favor Anthropic’s lead in this closely watched AI IPO contest.
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 Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.
This market will resolve to "OpenAI" if OpenAI completes an Initial Public Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.
Market Opened: Jan 30, 2026, 5:43 PM ET
Volume
$159,534End Date
Dec 31, 2027Market Opened
Jan 30, 2026, 5:43 PM ETResolver
0x65070BE91...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 Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.**Anthropic’s confidential SEC filing on June 1, 2026, ahead of OpenAI’s June 8 filing, has solidified trader consensus that it will reach public markets first, reflected in the 75.5% implied probability.**
The company’s $65 billion Series H round at a $965 billion valuation in late May provided fresh capital and momentum, while earlier steps such as retaining Wilson Sonsini for IPO preparations positioned it to move faster. Reports indicate Anthropic is explicitly targeting a potential listing as soon as fall 2026, possibly October, giving it a timing edge.
OpenAI has engaged banks and signaled flexibility for a September or late-2026 debut at up to $1 trillion valuation, but its later filing and statements about preferring to remain private longer have kept its odds lower. Key upcoming catalysts include any public S-1 disclosures or confirmed roadshow timelines that could shift the race, though current developments favor Anthropic’s lead in this closely watched AI IPO contest.
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 Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.
This market will resolve to "OpenAI" if OpenAI completes an Initial Public Offering (IPO) before Anthropic 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 50-50 if:
- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;
- Both companies complete an IPO on the same calendar date (ET); or
- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.
The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.
The resolution source for this market is a consensus of credible reporting.
Volume
$159,534End Date
Dec 31, 2027Market Opened
Jan 30, 2026, 5:43 PM ETResolver
0x65070BE91...**Anthropic’s confidential SEC filing on June 1, 2026, ahead of OpenAI’s June 8 filing, has solidified trader consensus that it will reach public markets first, reflected in the 75.5% implied probability.** The company’s $65 billion Series H round at a $965 billion valuation in late May provided fresh capital and momentum, while earlier steps such as retaining Wilson Sonsini for IPO preparations positioned it to move faster. Reports indicate Anthropic is explicitly targeting a potential listing as soon as fall 2026, possibly October, giving it a timing edge. OpenAI has engaged banks and signaled flexibility for a September or late-2026 debut at up to $1 trillion valuation, but its later filing and statements about preferring to remain private longer have kept its odds lower. Key upcoming catalysts include any public S-1 disclosures or confirmed roadshow timelines that could shift the race, though current developments favor Anthropic’s lead in this closely watched AI IPO contest.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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