The offering's size, price range and listing date are not in the reported details. Valuations are also moving. Some current and prospective investors now value Anthropic at about $1.5 trillion, down from roughly $2 trillion a week earlier, after the company disclosed some financial details at an investor event. The broader market is weak. CoreWeave and Nebius have lost more than 30% of their value in October, raising doubts about whether AI infrastructure spending will pay off. The filing warns that ongoing issues with the Trump administration and the U.S. Department of Defense could cause "material revenue losses or business disruptions." It also warns that if Anthropic's models cause extreme harm, liability could exceed what its insurance covers.
For attorneys, the filing starts the offering clock and gives investors their first audited view of a leading frontier AI lab. Watch the risk factors on government dependence, customer concentration, compute commitments and product liability, since these are the areas most likely to draw scrutiny from underwriters, regulators and plaintiffs. Track any amendments to the S-1 and any further valuation changes, because both will shape the terms and the disclosure record.