Anthropic filed an amended IPO prospectus with the SEC on Monday, putting its third-quarter numbers on the official record for the first time: $16.96 billion in revenue, a $567 million operating loss, and $895.4 billion in purchase and lease commitments, most of it for computing power. Why it matters: this is the first audited look at what it actually costs to run a frontier AI lab at Anthropic’s scale, weeks before a planned listing that could be the biggest IPO on record.
What happened
Anthropic’s original S-1, filed last week, only carried financials through June 30. The amendment filed Monday adds the quarter ended September 30, and the picture is mixed. Revenue keeps climbing fast in absolute terms, but the growth rate cooled and the company swung from an operating profit back into an operating loss.
The quarter in numbers
Third-quarter revenue was $16.96 billion, up from $11.56 billion in the second quarter and $1.38 billion a year earlier. That is growth of 47% quarter over quarter, down sharply from 144% in Q2. For the nine months ended September 30, revenue reached $33.24 billion, up roughly 1,200% from the same period last year.
The bottom lines need unpacking. Anthropic posted a $567 million operating loss in Q3, reversing $974 million of operating income in Q2. Its net loss was $23.29 billion, narrower than the $66.3 billion lost in Q2, but most of that figure is accounting rather than cash burn: about $21.9 billion came from revaluing convertible notes and related instruments upward as the company’s valuation rose. On an adjusted basis, excluding items such as stock-based compensation and charitable contributions, Anthropic reported $2.5 billion of operating profit, up from $2.2 billion in Q2, though its adjusted operating margin slipped to 15% from 19%.
Why the operating line went backwards
The company pointed to two main causes. It spent about $5 billion on computing capacity obtained through costlier short-term commitments instead of cheaper multiyear agreements — in plain terms, it paid a premium for compute it needed quickly. It also booked about $2 billion in noncash charges tied to its donation-matching program. Price cuts and contractual discounts took a further bite, reducing third-quarter revenue by roughly $600 million.
The $895 billion commitment
The disclosure most likely to drive the IPO debate is the commitment total: $895.4 billion in purchase and lease agreements, substantially all for compute and infrastructure, including some deals signed after September 30. About $69.8 billion of that falls due within 12 months of September 30. The amendment still leaves the IPO’s price range and share count blank, and Reuters has reported that some investors are now valuing Anthropic at around $1.5 trillion, down from roughly $2 trillion, after seeing its financial details at a recent investor event.
Why it matters
For anyone who uses Claude or pays for AI tools, this filing is the clearest evidence yet of the industry’s real economics: demand is enormous and still growing, but serving it means buying compute at almost any price, and even a $17 billion quarter does not guarantee an operating profit. Anthropic’s numbers will set the reference point every other AI lab’s IPO gets judged against — and they show why subscription and API prices across the industry face constant upward pressure from the cost of the chips underneath.
Frequently asked questions
What did Anthropic’s amended S-1 disclose?
It added third-quarter financials to the IPO prospectus Anthropic first filed last week: Q3 revenue of $16.96 billion, a $567 million operating loss, a $23.29 billion net loss driven mostly by a convertible-note revaluation charge, and $895.4 billion in purchase and lease commitments.
Why did Anthropic swing to an operating loss?
Mainly because it bought about $5 billion of computing capacity on expensive short-term commitments rather than cheaper multiyear deals, plus roughly $2 billion in noncash charges from its donation-matching program. Price reductions also cut about $600 million from revenue.
Is Anthropic profitable on any measure?
On an adjusted basis that excludes stock-based compensation and charitable contributions, yes: adjusted operating profit was $2.5 billion in Q3, up from $2.2 billion in Q2, though the adjusted margin narrowed to 15% from 19%.
When is Anthropic’s IPO?
The amended filing still leaves the price range and share count blank, so no final date or price is set. The company filed to go public last week and is moving toward a listing that could be among the largest IPOs ever.
Sources: Reuters, CoinDesk, CNBC