Anthropic, the San Francisco-based AI firm behind Claude, is reportedly preparing to release its IPO prospectus shortly after Labor Day, following a confidential draft Form S-1 submission to the SEC (U.S. securities regulator) in June. The move would place Anthropic alongside OpenAI in the competition to reach public markets and could precede a listing as early as late September or early October. Prediction-market pricing puts the chance of an IPO on September 30, 2026, at 6.5% YES, while the probability of a listing by December 31, 2026, stands at 95.5% YES. Investors will watch for roadshow dates, amended filings and the SEC's response to the S-1, as well as strategic moves by Amazon, Google and Salesforce Ventures. Developments involving OpenAI or changes in AI-sector valuations could also affect market reaction. The report promotes Vera as a source of live prediction-market analysis.