Anthropic's Amended IPO Filing Shows $17 Billion Q3 Revenue and $895 Billion in Compute Commitments

Anthropic filed an amended Form S-1 with the SEC on Monday, adding third-quarter results to the draft prospectus it submitted last week. The update reveals a company growing revenue at a pace rarely seen in enterprise software, while locking in compute obligations that dwarf the GDP of many countries.

The numbers

The headline figures, as reported by CNBC from the filing: revenue of roughly $17 billion in the third quarter, bringing nine-month revenue to $33.24 billion — up about 1,200% from the same period in 2025 [8]. The quarter-over-quarter growth rate slowed to 47%, down from 144% in Q2 and 132% in Q1 [8].

The company reported a net loss of $23.29 billion for Q3 and $104 billion for the nine months [8]. But most of that loss is non-cash. CNBC reports that the bulk of the nine-month loss came from changes in the fair value of convertible notes and derivative liabilities — accounting marks that rise when the company's valuation rises [8]. The operating picture is different: Q3 showed a $567 million operating loss, after a $974 million operating profit in Q2 [7]. Compute and infrastructure expenses rose $14.4 billion (329%) over the nine months [8].

Cash and short-term investments stood at $131.8 billion as of September 30 [6].

What the loss means

The gap between net loss and operating loss is wide and intentional. Anthropic has raised capital through convertible instruments that convert to equity at higher valuations. As the company's private valuation climbed — reportedly to $965 billion [4] — the accounting value of those instruments increased, creating paper losses. No cash left the building for the majority of the $104 billion figure.

The operating loss in Q3 was driven by $5 billion in compute under short-term commitments, which the filing says "costs significantly more than comparable multiyear arrangements" [7]. That distinction matters: short-term compute is expensive, and Anthropic is buying a lot of it.

Compute commitments: $895 billion and counting

The amended filing discloses purchase commitments and lease agreements of about $895.4 billion, "substantially all of which is related to compute and infrastructure" [8]. Of that, approximately $447.5 billion is expected by the end of 2030, with the remaining $447.9 billion between 2031 and 2045 [6]. Nearly $70 billion is due in the next 12 months [6]. The commitments include agreements entered after September 30 and leases not yet commenced [6].

The figure is not directly comparable to the roughly $450 billion cited in the initial draft. The new number includes leases and a broader set of infrastructure agreements. Axios notes the market for capital to support AI infrastructure spend "is starting to dry up" and cites the Financial Times reporting Anthropic may not secure an investment-grade debt rating [6].

Customer concentration and revenue mix

The filing provides more detail on who pays. About 80% of revenue comes from usage-based API and model calls; 20% from subscriptions [4]. In the first half of 2026, roughly 20% of revenue came from just two customers [4]. By Q3, the top five customers accounted for about 21% of quarterly revenue, with no single customer above 10% [4]. As of September, more than 11,900 customers spent over $100,000 annually, and nearly 1,900 spent over $1 million [4]. Net revenue retention was approximately 900% [4] — a figure that reflects expansion within existing accounts, not customer count growth.

Forty-eight percent of first-half revenue flowed through cloud marketplaces (AWS, Google Cloud, Microsoft Azure) [4]. Those same hyperscalers are also compute suppliers, investors, and competitors.

Governance and the Japanese allocation

Anthropic is a public benefit corporation with a dual-class structure. The Long-Term Benefit Trust, which includes former Fed Chair Ben Bernanke [4], will appoint a majority of the board [9]. The founders, through a "Founder LLC," hold Class F shares with 50.1% of voting power [9]. Public shareholders get Class A shares with one vote each but no control.

The amended filing also reveals a plan to raise up to $3.5 billion from Japanese investors in the U.S. IPO, with additional offerings in Australia, Canada, and parts of Europe, according to Reuters reporting [3]; the filing lists offerings in Australia, Canada, certain European Economic Area member states, Japan, Switzerland, and the United Kingdom [9]. Reuters reports the Japan allocation would exceed the $2.2 billion Japanese investors put into SpaceX's IPO in June [3].

What's not known

The filing does not set an IPO date, price range, or share count. The cover page still shows placeholders for the offering price and number of shares [9]. The registration statement becomes effective only when the SEC declares it so, and the company has reserved the right to delay [9]. Existing investors reportedly expect a valuation of $1.5–1.75 trillion, down from $2 trillion-plus discussed in August [4], but that is not in the filing.

The S-1 runs more than 90 pages of risk factors [8], covering political headwinds, its complex infrastructure needs, and the tension between safety and commercial goals [8]. Explainx.ai reports the filing also flags supply-chain dependence on TSMC and Taiwan [1]. The company warns that zero-data-retention requirements from some customers could become "incompatible" with advanced models [6]. It also discloses $2.1 billion in donation-matching expenses this year, 6% of operating expenses, expected to increase [6].

The pattern

Every update to this filing has moved the compute number up: from ~$450 billion in the draft to ~$895 billion in the amendment. The revenue number has also jumped — Q3 alone nearly matched the first half. If you track this story, track the commitments figure first. It tells you how much capacity Anthropic has promised to buy, and therefore how hard it must push revenue per unit of compute.