Anthropic IPO Probability Falls on Polymarket Ahead of October Deadlines

PPP prediction market tool monitoring shows that Anthropic's probability of going public on Polymarket fell to 6% before October 15, 2026, down 51% for the week, and to 60% before October 31, 2026, down 29% for the week. According to Odaily, the market settles as Yes if Anthropic formally lists on a public exchange and begins trading by 11:59 p.m. Eastern Time on the specified date, and as No if it is acquired by a listed company. Reuters previously reported, citing sources, that Anthropic planned to begin IPO roadshows as early as mid-October and aimed to list before the U.S. midterm elections in November. U.S. President Donald Trump's science and technology adviser, David Sacks, called for Anthropic's IPO to be paused until an investigation into related whistleblower claims is completed.