Anthropic’s original IPO prospectus, filed last week, offered investors financials only through the first half of the year. The amended S-1 filed Monday filled in the missing third quarter—and made the scale of both its momentum and its exposure unmistakable.¹

For the quarter ended Sept. 30, the Claude developer reported roughly $17 billion in revenue, up from $11.6 billion in the prior quarter and more than 12 times the level a year earlier. Revenue for the first nine months reached $33.24 billion, a year-on-year increase of about 1,200%.² That acceleration is the optimistic case for the company: enterprise customers are buying its AI products at a pace that could support an IPO reportedly capable of valuing Anthropic at $2 trillion.³

But the updated filing also shows how expensive that growth has become. Anthropic recorded a $23.29 billion quarterly net loss and disclosed $895.4 billion in purchase commitments and lease agreements, “substantially all” for compute and infrastructure.⁴ About $70 billion falls due within 12 months, while roughly $447.5 billion is expected by the end of 2030.²

The headline nine-month net loss—$104 billion—was largely shaped by non-cash accounting charges tied to convertible notes and derivative liabilities, rather than solely by day-to-day operations.⁴ Still, operating economics worsened in the third quarter: the company swung to a $567 million operating loss after $974 million in operating income in the second quarter, attributing the reversal primarily to $5 billion of costly short-term compute commitments.¹

Anthropic ended September with substantial liquidity, including $131.8 billion in cash and short-term investments.² Yet the filing sharpens the investor dilemma. Revenue is rising fast, but the company’s infrastructure bill is rising faster in absolute terms—and an IPO, even a record-sized one, may not settle the question of who ultimately finances the AI buildout.³