Anthropic has delayed its initial public offering from September to November. The San Francisco-based AI company, which recently unveiled its Claude Opus 5.5 model, was valued at $965 billion following its Series H funding round in May 2026, making it the most valuable AI startup in the world. The delay has prompted a shift in market sentiment, with a notable decrease in the likelihood of an IPO occurring before September 30, 2026. Observers are closely watching for further announcements regarding IPO specifics, such as filing updates or roadshow plans.
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