Anthropic's market cap be between $2.25T and $2.5T at market close on IPO day priced at 14.5% on Polymarket, up 6 points, on $316K traded

Anthropic valuation contract moves higher

Polymarket traders priced a 14.5% probability that Anthropic’s market capitalization would fall between $2.25T and $2.5T at the close of its IPO day, according to the supplied market update published Oct 21, 2026, at 1:24 AM ET. The contract rose 6 probability points, with $316K traded.

The move concerns a specific closing valuation range, rather than the likelihood of an IPO itself. It also does not establish a broader market consensus about Anthropic’s eventual valuation outside that band.

No fresh catalyst identified

The accompanying news summary reported no significant new platform headline in the preceding 30 minutes. It described search results as recirculating previously handled material, but the summary is incomplete and identifies no specific development behind the repricing.

According to predictionbubbles.net, its movers dashboard compares probabilities over 24 hours and refreshes every 15 minutes using prices from Polymarket and Kalshi. The supplied page records a venue snapshot taken on 21 Oct 2026 at 05:06 UTC.

Predictionbubbles.net also highlighted a separate question about whether Anthropic would have the highest IPO market capitalization in 2026. That is a different outcome from the $2.25T–$2.5T closing-value contract; the supplied page provides no price or move for that separate question.

The dashboard ranks changes by probability points, not relative percentage gains, and treats trading volume as context rather than a ranking input. Its methodology distinguishes price movement from trading activity: neither a large change nor substantial turnover alone establishes why traders revised their expectations.

What it means for prediction markets

• A narrow outcome gained ground: The 14.5% price applies only to Anthropic closing its IPO day within the specified $2.25T–$2.5T range.
• The catalyst remains unverified: The supplied news scan found no significant new platform headline in its 30-minute window, leaving the reason for the 6-point increase unresolved.
• Volume is not liquidity: The reported $316K traded provides activity context, but the supplied material does not establish order-book depth or how much trading drove the move.