OpenAI IPO by...?

Polymarket Finance › IPOs & deals Closes Jun 30, 2027 · $1.3K today · $3.1M traded · $135K at stake · prices read 27 min ago

The odds

40%June 30, 2027

December 31, 20264%
March 31, 202721%▲ 1
June 30, 202740%▲ 3

How the odds have moved

December 31, 2026: 5% on Oct 20, 4% now.

Each outcome's chance over time on Polymarket. The dots along the bottom are headlines about its subject: point at one to read it.

Every outcome

Outcome	Chance	Day	Bid	Ask	Pays	Traded
December 31, 2025	<1%			0¢		$496K
June 30, 2026	<1%			0¢		$957K
July 31, 2026	<1%			0¢		$184K
August 31, 2026	<1%			0¢		$207K
September 30, 2026	<1%			0¢		$151K
December 31, 2026	4%		3¢	4¢	$26.32	$1.1M
March 31, 2027	21%	▲ 1	20¢	21¢	$4.76	$6.7K
June 30, 2027	40%	▲ 3	39¢	40¢	$2.50	$8.8K

"Pays" is what a $1 stake returns if that outcome happens, at the price shown (before any fees). Bid and ask are the best prices to sell and buy "Yes".

The news: OpenAI, ChatGPT, OpenAI IPO

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UK commits £100M to AI biosecurity lab with OpenAI, Anthropic, DeepMindCrypto Briefing · 30 h agoEstefano Gomez is an editor at Crypto Briefing specializing in blockchain analysis, DeFi, and the intersection of crypto and digital art. He previously served as Editor in Chief at Interesante for over three years, where he covered…
OpenAI trims valuation target to $1.25 trillion after investor resistanceCrypto Briefing · 39 h agoEstefano Gomez is an editor at Crypto Briefing specializing in blockchain analysis, DeFi, and the intersection of crypto and digital art. He previously served as Editor in Chief at Interesante for over three years, where he covered…
Texas Sues OpenAI, Altman Over ChatGPT Safety Claims@law360 · 31 h agoThe Texas attorney general's office sued OpenAI and its chief executive Sam Altman in state court Friday, alleging the company breached consumer protection laws by unleashing a chatbot that often gives harmful advice and is addictive to…
Texas Attorney General Ken Paxton sues ChatGPT-maker OpenAI@kbtxnews · 32 h agoTEXAS (The Texas Tribune) - Attorney General Ken Paxton is suing OpenAI, the maker of ChatGPT, for allegedly deceiving and harming Texans. This is the latest in a flurry of lawsuits filed against Big Tech companies and private corporations…
Sweden's Government Offices Block ChatGPT and Claude, Keep Microsoft CopilotDecrypt · 9 h agoSweden's Government Offices—the administrative body supporting the prime minister and cabinet—will block ChatGPT and Claude on staff computers from Monday, directing civil servants to Microsoft's Copilot as the only approved AI tool…
Texas AG Ken Paxton sues OpenAI over ChatGPT safety claimsHouston Chronicle · 31 h agoTexas Attorney General Ken Paxton is suing technology company OpenAI for allegedly failing to protect Texans from the harms of using ChatGPT. Paxton speaks during a news conference with U.S. Energy Secretary Chris Wright in Houston on…
Will the Anthropic and OpenAI IPOs follow SpaceX in upending the underwriting market?The Globe and Mail · 5 days agoShould Anthropic and OpenAI insist on most of their shares being allocated to buy-and-hold investors and are aggressive in negotiating a low gross spread, the profitability of the IPO business for the major underwriters will be under…
OpenAI Opens ChatGPT Advertising to Nigerian BusinessesProduct Reviews · 2 days agoThe rollout introduces conversational monetization to one of Africa’s most vibrant digital economies, granting local organizations direct access to a rapidly expanding user base that relies on generative AI for daily productivity…
Fired OpenAI researchers say independent safety audits aren't going wellNPR · 31 h agoIn their first interview since being fired, OpenAI safety researchers Mikita Balesni and Tomek Korbak say they were terminated for prioritizing safety over the short-term interests of the company. Fired OpenAI researchers say independent…
Texas Attorney General Ken Paxton sues OpenAI and Sam Altman over ChatGPT safety claimsCrypto Briefing · 32 h agoThe Collin County lawsuit alleges OpenAI misled users about ChatGPT's risks and failed to protect children from harm OpenAI / Wikimedia Commons (Public domain) Texas Attorney General Ken Paxton has sued OpenAI and its CEO Sam Altman. He…
Texas becomes the latest state to sue OpenAI.The Verge · 33 h agoSimilar to the lawsuits filed by Arizona, West Virginia, Iowa, and several others, Texas Attorney General Ken Paxton accuses OpenAI of misleading users about the safety of ChatGPT, allegedly exposing children and other users to a “litany…
OpenAI takes ChatGPT models to Google Cloudthehansindia.com · 3 days agoOpenAI is expanding its cloud reach with Google, giving businesses more flexibility while Microsoft remains its primary cloud partner. OpenAI is making its artificial intelligence models widely available by bringing ChatGPT technology to…

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Anthropic IPO Closing Market Cap

29%$1.75–$2.0T

$1.75–$2.0T29%▲ 2
$2.0–$2.25T20%▼ 2
$1.5–$1.75T18%▼ 3

7 more

$2.25–$2.5T10%▼ 1
$1.25–$1.5T9%▲ 4
<$1.25T5%▲ 1
$2.5–$2.75T3%▲ 1
$3.0T+3%
No IPO by December 31, 20272%
$2.75–$3.0T1%

Finance › IPOs & deals

What will OpenAI's IPO valuation be?

$1.49Tmedian

$750B$2.75T

Median $1.49TMiddle half $994.14B – $1.86T

Finance › IPOs & deals

Anthropic IPO by __?

Nov 27, 2026even chance by

October 31, 2026<1%
November 15, 20262%
November 30, 202664%▲ 5

2 more

December 15, 202674%
December 31, 202677%▼ 5

Finance › IPOs & deals

Largest IPO by market cap in 2026?

64%SpaceX

SpaceX64%▼ 6
Anthropic31%▲ 6
OpenAI<1%

9 more

Stripe<1%
ByteDance<1%
Databricks<1%
SHEIN<1%
Waymo<1%
Revolut<1%
Discord<1%
Perplexity AI<1%
Kraken<1%

Finance › IPOs & deals

What will Anthropic's public ticker be?

48%$ANT

$ANT48%▼ 10
$ANTH29%▲ 7
$AAI8%▲ 3

6 more

$ANAI5%▲ 5
$APBC4%▼ 1
$CLDE4%▼ 1
$ARPC1%
$CLD1%
$CLAU<1%

Finance › IPOs & deals

When will Anthropic officially announce an IPO?

Nov 24, 2026even chance by

Before Nov 1, 20261%
Before Dec 1, 202668%▼ 1
Before Jan 1, 202779%▼ 5

3 more

Before Feb 1, 202789%▲ 1
Before Mar 1, 202792%
Before Apr 1, 202792%

Odds are traders' prices on Kalshi, Polymarket, ForecastEx and Crypto.com, not forecasts by 4Search. Prices read from the venues just now. Prices may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts. Not betting or investment advice.

About this market

VenuePolymarket

Trading closesJun 30, 2027 11:59 PM ET

Traded$3.1M

Today$1.3K

This week$35.8K

At stake$135K

In the news125 headlines today, 1,799 this week

Followed here sinceOct 19, 2026

The rules

This market will resolve to "Yes" if OpenAI completes an Initial Public Offering (IPO) by the listed date ET, as confirmed by official company announcements and credible news sources. Otherwise, this market will resolve to "No". The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange. If OpenAI is acquired by another company that is already public, this market will immediately resolve to "No." The resolution source for this market is a consensus of credible reporting.

The full rules are on the market's page at Polymarket.

Reading the odds

A prediction market trades contracts that pay $1 if something happens. Its price is the market's chance: a contract at 62¢ means traders give it 62%. Each number here is the midpoint between the best bid and offer, or the last trade when they are more than ten cents apart.

For a question with many answers (who wins, which range a number lands in), the chances are scaled to add up to 100%. A price ladder ("above 4.25%, above 4.50% ...") gives a whole distribution: its median is where traders see an even chance either way.

Kalshi is a U.S. exchange regulated by the CFTC; its money is counted in contracts, shown here as dollars at their price. Polymarket counts dollars. ForecastEx is Interactive Brokers' exchange, regulated by the CFTC; its contracts too are shown as dollars at their price. Crypto.com lists its markets on Crypto.com | Derivatives North America, a U.S. exchange regulated by the CFTC; it reports the dollars traded. Where more than one asks the same question, each is shown, never averaged.

Prefer betting odds? Switch to American (+150) or decimal (2.50) odds at the top of the page.

Prediction-market prices are what traders pay for each outcome on Kalshi, Polymarket, ForecastEx and Crypto.com, read as the market's implied chance. They are not forecasts by 4Search, can move fast and can be wrong; they are read every few minutes and may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts at their price. News comes from the 4Search index; prices of stocks, rates and coins from 4Search Finance. Nothing here is betting, financial or investment advice. Terms of use.