Anthropic files S-1 for Nasdaq IPO under ticker ANT

Anthropic had already taken the first step toward a public listing on June 1, 2026, when it announced a confidential draft registration statement with the SEC. That route let the company prepare without disclosing detailed financials, risks, or other internal matters. Filing the S-1 makes those details public, including its financial condition, legal issues, risks, and the breakdown of its largest voting shareholders.

The S-1 also reveals the scale of Anthropic's losses: a net loss of more than $80 billion for the first half of 2026, compared with $13 billion a year earlier. The filing attributes most of that loss to fair value accounting charges on financial instruments such as convertible bonds, which were marked up as Anthropic's valuation rose. That explanation suggests the loss figure is shaped by valuation gains rather than solely by operating results, though the filing does not break out the two.

In the filing's overview, Anthropic argues that intelligence has become something humans can produce at scale, and that abundant AI could transform every sector of the world economy. The company describes Claude's growth as driven by an 'improvement loop' that advances the model and an 'investment loop' that funds frontier AI research. The listing, if completed, would give Anthropic access to public markets to fund that research, but the filing notes the registration statement has not yet become effective and no shares can be sold until it does.