ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins88% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or betterin 21 days
Estimated: this is a listing-date market, which is separate from the earlier IPO announcement. Polymarket[1][2] resolves Yes only once shares are listed and open for trading, so the first strike at or above 50% is November 19, 2026 (52%). Prices read on 27 October 2026 from the exchange's public API; event volume US$5,906,665 is as reported by Polymarket. Polymarket
On 27 October 2026 Polymarket put Anthropic shares listed and open for trading by November 19, 2026 at 52%, on US$5,906,665 of event volume. That strike is the first to pass even odds, so it marks the market's expected first day of trading.