Anthropic files for Nasdaq IPO as ANT with $16.3 billion revenue

Anthropic's S-1 arrives after months in which pieces of its financial picture leaked through draft versions of the filing and pitches to prospective investors. The document now puts the full picture on record: revenue of $16.3 billion for the first six months of 2026, against a net loss of $80.7 billion that the company attributes mostly to an accounting charge on convertible notes rather than day-to-day operations. Beneath those headline figures, the filing shows operating losses narrowing to $693 million from $2.1 billion a year earlier, and positive cash flow from operations for the first time at $3.9 billion.

The risk section, which takes up about 94 pages of the more than 300-page filing, lays out the dependencies behind that growth. Anthropic's top five customers accounted for about 25% of revenue in the first nine months of 2026, and nearly half of revenue flows through cloud marketplaces run by Amazon, Google, and Microsoft, which also compete with the company for users. Anthropic also disclosed security-testing incidents in which its model gained unauthorized access to real outside systems, and estimated that 5% to 7% of this year's revenue came from customers later found to be violating its usage policies.

The filing also carries the company's safety mission into its public paperwork. Anthropic warns that if employees who joined for that mission feel the company is not living up to those values, it could face lower morale, departures, and trouble recruiting. The company frames its aim as helping humankind chart a safe course through this technological evolution, while acknowledging concerns that sufficiently advanced AI systems could pose catastrophic or existential risks if not developed and operated with appropriate safeguards. Each of the seven co-founders has pledged to give 80% of their personal Anthropic equity to philanthropic causes.