Anthropic IPO by December 15, 2026 priced at 91.5% on Polymarket, down 1.5 points, on $319K traded

Polymarket’s contract on whether Anthropic will complete an IPO by December 15, 2026 stood at a market-implied probability of 91.5%, down 1.5 percentage points, with $319K traded. The snapshot was published on Oct 29, 2026 at 8:54 PM ET.

The price still heavily favored an IPO before the deadline, despite the decline. It represents traders’ assessment of the outcome, not confirmation of a listing or its timing.

No fresh catalyst identified

The accompanying news summary identified no significant new platform headline in the preceding 30 minutes. It described search results as recirculating previously encountered material, leaving no fresh reported development in the supplied information to explain the move.

The provided source also contains no Anthropic-specific reporting on IPO preparations. The available material therefore supports a price update, but not a conclusion about what caused traders to lower the probability.

Reading the snapshot

According to predictionbubbles.net, its finance-market data refreshes every 15 minutes, while trading on the underlying venues continues between updates. The site defines probability changes as percentage-point moves over the previous 24 hours and volume as total trading reported by the venue.

PredictionBubbles aggregates markets from Polymarket and Kalshi, but cautions that related contracts can have different wording and resolution rules. Its supplied finance overview does not include the detailed settlement criteria for the Anthropic contract.

What it means for prediction markets

• A strong expectation, not a settled outcome: The 91.5% price heavily favors an IPO by December 15, 2026, while leaving room for the deadline to pass without a qualifying event.
• The catalyst remains unclear: The 1.5-point decline cannot be tied to a new Anthropic development from the reporting provided.
• Volume is cumulative: The $319K traded should not be read as money exchanged during the latest move or the preceding 30 minutes.
• Contract terms matter: Without the detailed resolution rules, the supplied material does not establish exactly what milestone would qualify as an IPO.