Traders expect Anthropic's market debut most likely in the week from 16 November
Polymarket prices give about 55 percent for the window from 16 to 20 November. Anthropic itself names no date.
On Polymarket, prices on 4 November 2026 give a chance of about 55 percent that Anthropic shares will trade for the first time between 16 and 20 November. By 30 November the value is 84 percent.
For a valuation at the offering price between $1.50tn and $1.75tn, the price stood at 64.8 percent. The Wall Street Journal reported on investors proposing $1.5tn to $1.6tn.
Anthropic filed an amended prospectus on 2 November. Price and date remain open in it. The prices are traders' bets and not statements by the company.
Source: FourWeekMBA, as of 4 November 2026. More dates under Dates.