Anthropic's Amended IPO Filing Shows Revenue Surge and Huge Loss

How fast can an AI company grow while losing this much? Anthropic's amended S-1 filing adds results through September 30 and shows nine-month revenue of $33.24 billion, up nearly 1,200%. The net loss reached $104 billion, compared with $25.1 billion a year earlier, mainly because of valuation adjustments on convertible notes and derivatives.

Third-quarter revenue was about $17 billion, but quarter-on-quarter growth slowed to 47% from 144% in the second quarter. That deceleration may draw close attention from investors even though the absolute numbers remain enormous. The filing also lists purchase and lease commitments of roughly $895.4 billion, mostly for compute and infrastructure.

The scale of those obligations highlights how much capital frontier AI developers need before profits arrive. Because much of the loss stems from accounting adjustments rather than operations, analysts will separate paper charges from cash burn. The filing offers an unusually detailed look at the economics behind one of the industry's most valuable private companies.