Anthropic delays IPO to November amid market anticipation

Anthropic / Wikimedia Commons (Public domain) Anthropic’s initial public offering (IPO) has been delayed to November, according to a recent report. The San Francisco-based AI company, which recently unveiled its Claude Opus 5.5 model, was initially slated for a September debut. The delay comes amidst high market anticipation, as Anthropic remains the most valuable AI startup following its Series H funding round in May 2026, which valued the company at $965 billion. This news has led to a shift in market sentiment, with a notable decrease in the likelihood of an IPO occurring by September 30, 2026. Key Takeaways The delay of Anthropic’s IPO to November suggests reduced likelihood for a September 30, 2026, listing, consistent with a decrease in YES odds for that timeframe. Market pricing suggests uncertainty around Anthropic’s market cap expectations at IPO, with a moderate decrease in YES odds for a market cap less than $1.25 trillion. The recent developments, including the release of Claude Opus 5.5, indicate Anthropic’s continued focus on advancing AI technology, possibly impacting long-term market expectations. What to Watch Watch for further announcements from Anthropic regardin...