Anthropic has put a third quarter on the record. An amended registration statement, filed with the US Securities and Exchange Commission on Monday 2 November, extends the financial disclosures in the S-1 the company released the week before. That first filing, TechCrunch reported, covered results only through 30 June. The update runs to 30 September.
The new numbers point in two directions at once. Revenue is much larger. The share of it going on compute has also grown.
What the update shows
CNBC reported that Anthropic generated $33.24bn in revenue in the nine months ended 30 September, up roughly 1,200% on the same period a year earlier. For the third quarter alone, CNBC put revenue at roughly $17bn, up about 1,127% year on year. Cape Fear Advisors, an analysis newsletter that read the amendment, gives the filed figure of $16,956m.
The net loss is large. CNBC reported a $104bn net loss for the nine months, most of it due to the change in fair value of convertible notes and derivative liabilities. The loss for the same stretch of 2025 was $25.1bn. For the third quarter on its own, CNBC reported a net loss of $23.29bn. Tech Insider reported a separate, much smaller operating loss of $567m for the quarter.
Growth slowed
CNBC reported that third-quarter revenue rose around 47% on the previous quarter, a steep drop from 144% in the second quarter and 132% in the first. Revenue still grew in absolute terms. TechCrunch put the previous quarter's revenue at $11.5bn, so the quarter added several billion dollars on top.
TechCrunch's own reading was that "as long as revenue is growing at nearly 50% a quarter", few investors would worry about high compute costs.
Compute took a bigger share
TechCrunch reported that compute took up 58% of Anthropic's revenue in the quarter, up from 48% the quarter before. A chart in the filing tracks revenue for every dollar spent on compute. As TechCrunch described it, the figure peaked at just over 2x and then fell back to 1.72x.
Anthropic's explanation, as quoted by TechCrunch, is that the quarter included "$5.0 billion of compute under short-term commitments, which currently costs significantly more than comparable compute procured under our multi-year commitments." Cape Fear Advisors said the filing attributes the quarter's $567m operating loss "primarily" to that short-term compute and to $2.0bn of non-cash donation-matching charges. TechCrunch put the quarter's compute bill at about $10bn, and Tech Insider at $9.9bn. CNBC reported that compute and infrastructure expenses rose by $14.4bn over the nine months, up 329% on the same period last year.
TechCrunch read this as demand growing so fast that Anthropic had to pay higher rates for capacity. It also said many indications imply the shift is more of a blip than a long-term problem. That is TechCrunch's judgement, not a figure from the filing. The filing's outlook, as TechCrunch quoted it, speaks to the size of the bill: "We expect compute and infrastructure expenses to increase in absolute dollars and remain our largest operating expense for the foreseeable future as additional committed compute becomes available to us under multi-year arrangements with CSPs, and as we continue to invest in additional compute."
Anthropic's answer to rising costs is its own capacity. TechCrunch reported that the company talks at length about a project it calls "Anthropic Direct". CNBC reported that Anthropic gets much of its capacity from Amazon, Google and SpaceX, and relies on neoclouds for some.
The commitments behind it
CNBC reported that in the amended S-1 Anthropic said it has entered into purchase commitments and lease agreements with an aggregate committed spend of about $895.4bn, "substantially all of which is related to compute and infrastructure." Tech Insider put about $70bn of the total as falling due within a year.
Cape Fear Advisors noted that about $213.8bn of the total "relates to arrangements that are subject to either exercisable termination rights or contingent conditions prior to commencement, such as the counterparty's ability to secure financing, facilities, or regulatory approvals". Cape Fear also quoted a risk factor it said was new to the amendment, saying some compute providers "depend on third-party financing or credit support to acquire chips and develop capacity". It continues that "if such financing or support becomes unavailable or more costly, contracted capacity may be delayed, repriced, reduced, or not delivered."
CNBC placed this against wider market worries. It reported that Wall Street has been concerned that rising interest rates will make debt unaffordable for many data centre developers and neoclouds. It also reported that quarterly reports from Microsoft, Alphabet and Amazon the previous week added to those concerns.
What the filing does not settle
A filing is a step towards a listing, not a listing. In its report on the original 26 October filing, Tech Insider said the company plans to list on the Nasdaq under the ticker ANT. Cape Fear Advisors, reading the amendment on Monday, said the price range was still blank. Tech Insider wrote on 3 November that the sources it reviewed did not confirm a listing date, offering size or price range. It added that the amendment is a disclosure document that can be amended again.
CNBC also reported that OpenAI confidentially filed its prospectus with the SEC in June, and that its executives have signalled they are aiming for a 2027 debut.
My reading is that the cost of growth now matters as much as its pace. A quarter of very fast growth is now on the public record, but so is a sharper picture of what that growth costs to serve. That picture is on the page, in Anthropic's own words, for anyone who reads past the revenue line.
Sources
Brandom, R. (2026) 'Anthropic is still grappling with the economics of compute', TechCrunch, 3 November 2026, available at: https://techcrunch.com/2026/11/03/anthropic-is-still-grappling-with-the-economics-of-compute/ (Accessed: 4 November 2026).
Cape Fear Advisors (2026) 'Anthropic, Amended: The Bridge and the Far Bank', Cape Fear Advisors (Substack), 2 November 2026, available at: https://capefearadvisors.substack.com/p/anthropic-amended-the-bridge-and (Accessed: 4 November 2026).
CNBC (2026) 'Anthropic reports $17 billion in Q3 revenue, purchase commitments of $895.4 billion in revised S-1', CNBC, 2 November 2026, available at: https://www.cnbc.com/2026/11/02/anthropic-ant-s-1-quarter-financials.html (Accessed: 4 November 2026).
Dubois, N. (2026a) 'Anthropic Files for IPO: $80.7B Loss on $16.3B Sales [2026]', Tech Insider, 26 October 2026, available at: https://tech-insider.org/anthropic-ipo-s-1-filing-ant-nasdaq-16-3b-revenue-2026/ (Accessed: 4 November 2026).
Dubois, N. (2026b) 'Anthropic Growth Slows to 47% as $895B Bills Loom [2026]', Tech Insider, 3 November 2026, available at: https://tech-insider.org/anthropic-q3-growth-slows-47-percent-895b-compute-commitments-2026/ (Accessed: 4 November 2026).
