PolymarketAI / TechDevelopingUpdated 14m ago

Will Anthropic IPO by October 31, 2026?

As of Oct 26, 2026, 10:32 AM ET, Polymarket priced this market at 0.6% (little changed over 24 hours). It had $127.4K traded in the past 24 hours, $75K of order-book liquidity and a bid-ask spread of 0.2 pts. probcast.co rates the support behind this price as strong.

Market probability
0.6%
Little changed over 24 hours
Resolving soon

Deep, easy-to-trade market — though most recent trading came from one account.

Price historyPolymarket

Source: Polymarket price history

How credible was the move?

Methodology →

Move validity

Strong

Consensus stability

Stable

Contract clarity

High

Can you trust this price?

Two different questions: how hard the price is to move, and whose trading set it.

Market capacity

How hard is it to move this price?

DeepTight spread

Order-book liquidity

$75K

Bid-ask spread

0.2 pts

24h volume

$127.4K

Total volume

$1.4M

It would take roughly $762.1 of buying to move the price up by ~5 pts.

Lots of money on the book and a tight spread — a single ordinary order can't move this price much.

Who's trading

Whose opinion is this price?

One account dominates
64%of the traded money came from the single largest account

Accounts

154

Trades

200

over 5 days

Largest order

$353.4

$551.8 traded across these 200 trades (last 5 days).

One account did most of the recent trading — the price reflects that account's view more than a crowd's.

Recent trade activity$551.8 traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

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 r…

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution 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.

What could move this market next?

  • The market's deadline arrivesOctober 31, 2026 at 11:59 PM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Oct 26, 10:46 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Probability by deadline

The same event, priced across deadline contracts on this venue.

Extending the deadline from Nov 30 to Dec 31 adds about 3.5 percentage points of implied probability.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: high · expected error ±11 pts.

Quote-drivenLegacy movement classifier: watch

What's happening

medium classifier confidence
Quote-driven

A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.

  • Tight spread on a liquid, calm market

The latest price is a usable but caveated read — weigh it with the market state.

More details — reliability score, dynamics, durability
Reliability score
61Medium
Where the price path tends to go next324 observed
  • Stable consensus95%
  • Choppy / mean-reverting3%
  • Trend continuation1%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life ~2d
PredictabilityStable

Secondary read: leaning toward Trading normally.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Change (pts)1H+0.46H+0.624H+0.37D+0.3

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