Anthropic Announces an IPO
ESTIMATED67% CONFIDENCENothing has been scheduled: this is a "by when" market. November 2026 is the month it prices highest — the ladder rises from 9% before November 1 to 50% before December 1, a 41-point month against 24 for December — and a month-only date takes its last day.[1]
Kalshi
Kalshi
On 20 September 2026 Kalshi’s Anthropic IPO ladder went from a 9% chance of an announcement before November 1 to 50% before December 1, putting 41 points of probability on November 2026 alone — by far the single likeliest month. By April 2027 the market had the announcement at 91%.
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