Polymarket data indicates that Anthropic's IPO is most likely to occur in October, with an implied probability of 63%, despite reports of a delayed roadshow. The roadshow is not expected to begin before mid-October, partly due to delays in negotiating a $15 billion revolving credit facility and filing the public prospectus. Underwriters Morgan Stanley, JPMorgan Chase, and Goldman Sachs are reportedly aiming for a listing before the US midterm elections on November 3.