Will Anthropic IPO by October 31, 2026?
Yes at 0% on 29 Oct 2026, unchanged over the previous 7 days. 1 big jump since 29 Sep 2026, listed below.
Data from Polymarket. Numbered dots are the jumps explained below.
Context
This market asks whether artificial intelligence startup Anthropic will complete its initial public offering and begin trading on a public securities exchange by October 31, 2026. The market resolves to "Yes" if shares are listed and open for trading by the deadline, and "No" otherwise, including if the company is acquired by an already public firm.
Recent reports indicate that Anthropic has officially filed its S-1 prospectus to go public, sparking widespread discussion regarding its valuation, finances, and retail investor access. While the IPO filing has generated significant market attention, some reports note that the company could begin marketing its IPO as late as the week of November 9, well past the current market's October deadline.
Sources: Musings on Markets: The Anthropic Prospectus Arrives: My (but not the) IPO valuation!, Yahoo Finance: Anthropic to offer IPO shares to UK retail investors with RetailBook, CNBC: Anthropic filed to go public—what retail investors should weigh before its IPO, Built In: Anthropic IPO Filing: Valuation, Finances and Key Details, Yahoo Finance: Anthropic Could Begin Marketing Its IPO the Week of Nov. 9
Written by AI from the linked news sources and checked automatically, not by a person.
What could move it next
No upcoming events listed for this market yet.
Price jumps explained
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29 Sep 2026
Anthropic IPO Probability Drops Despite S-1 Prospectus Leak
The chance of Anthropic completing an IPO by October 31, 2026, dropped significantly after news emerged regarding its massive financial losses and huge infrastructure costs. Reports indicated that the company lost $42 billion in 2025 alongside warnings about existential risks and legal uncertainties related to AI agents. These financial disclosures and risk warnings caused market sentiment to shift during the trading day.
Sources: Fortune: Anthropic $2 trillion IPO S-1 prospectus has leaked—and it shows steep losses, Reuters: EXCLUSIVE: Anthropic says rogue AI agents pose uncertain legal risk for the company, The Motley Fool: Anthropic Reportedly Generated $4.6 Billion in Revenue and Lost $42 Billion in 2025. Will This Impact Its Targeted $2 Trillion Valuation?, Yahoo Finance: Market Chatter: Anthropic Lost $42 Billion in 2025 as Future Infrastructure Costs Reach $518 Billion, Diari ARA: Anthropic warns before making the leap to the stock market that AI can pose "existential risks to humanity", Investing.com South Africa: Anthropic prospectus shows $2 trln IPO ambition despite huge loss, Reuters reports By Investing.com, This is Money: AI giant Anthropic warns of 'existential risks to humanity' as it targets $2trn stock market debut, BigGo Finance: US Stock Futures Edge Higher Premarket as Chip Stocks Rebound; Anthropic IPO Filing Reveals Massive Losses
After 24 h: held. After 7 days: held.
Written by AI from the linked news sources and checked automatically, not by a person.
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Questions about this market
What are the odds for “Will Anthropic IPO by October 31, 2026”?
On 29 Oct 2026, Polymarket traders priced Yes at 0%, which means they saw about a 0 in 100 chance. That was unchanged over the previous 7 days. The live price is shown in the chart at the top of this page.
Why did the odds move recently?
The latest explained move was on 29 Sep 2026, from 15% to 4%: Anthropic IPO Probability Drops Despite S-1 Prospectus Leak. The chance of Anthropic completing an IPO by October 31, 2026, dropped significantly after news emerged regarding its massive financial losses and huge infrastructure costs. Every big move is listed under “Price jumps explained” (this one is number 1).
Do big jumps in this market usually hold?
Of the 1 big jump old enough to check, 1 held after 24 hours (kept at least 70% of the move).
How does this market resolve?
This market will resolve to "Yes" if Anthropic shares are listed on a public securities exchange and open for trading by 11:59 PM ET on the listed date. Otherwise, this market will resolve to "No." If Anthropic is acquired by another company that is already public, this market will immediately resolve to "No." The full Polymarket rules are at the bottom of this page.
When does this market end?
Polymarket lists 1 Nov 2026 as the end date. It can settle earlier or later if the rules say so, for example when an official result comes in.
Can I bet on this market on predictionwave?
No. predictionwave only explains the odds. The market itself runs on Polymarket, and trading there is not allowed in every country.
How this market resolves (Polymarket rules)
This market will resolve to "Yes" if Anthropic shares are listed on a public securities exchange and open for trading by 11:59 PM ET on the listed date. Otherwise, this market will resolve to "No." If Anthropic is acquired by another company that is already public, this market will immediately resolve to "No." The primary resolution source for this market is official filings and announcements from Anthropic and the relevant securities exchange on which the shares are listed, including SEC filings (e.g., Form S-1, Form 8-A), exchange listing confirmations, and official press releases from Anthropic; however a consensus of credible reporting may also be used.