Anthropic, PBC filed its Form S-1 with the U.S. Securities and Exchange Commission on October 26, ahead of a listing on the Nasdaq Global Select Market under the ticker ANT. Goldman Sachs and Morgan Stanley are the lead underwriters, and the company has not yet set a price range or a share count.
The document answers the question hanging over enterprise AI: is selling tokens a business or a subsidy? In the first half of 2026 Anthropic booked $16.29 billion in revenue against $2.38 billion in cost of revenue, an implied gross margin of about 85%. A year earlier the same arithmetic produced roughly 12%.
Anthropic confirmed the filing in a statement on its newsroom. The registration statement is public on EDGAR under CIK 0002130357.
The Numbers That Matter, and What They Mean
The income statement is not the most useful page. Adjusted operating income came in at $1.62 billion, a 10% margin, once noncash items are excluded. The reported GAAP loss of about $80 billion comes almost entirely from remeasuring convertible notes. Cash from operations was $3.93 billion against $482 million of capital expenditure.
| Figure in the S-1 | What it means for a buyer |
|---|---|
| H1 2026 revenue $16.29B, from $1.16B | Growth is enterprise-led, not consumer-led |
| Cost of revenue $2.38B, gross margin about 85% | Substantially all of that cost is compute and infrastructure |
| $657B in infrastructure agreements, $498B noncancelable | Costs are locked in whether the capacity is used or not |
| Compute efficiency 2.08 in Q2 2026 | $11.6B of revenue against $5.6B of compute cost, up from 0.69 in Q4 2025 |
| 11,900 customers above $100K a year, from 950 | Expansion happens inside accounts that already bought |
| Net revenue retention around 900% at Sept. 30 | Existing accounts spend nine times more twelve months later |
Why an 85% Margin Does Not Mean Cheaper Tokens
A gross margin tells you what a company keeps, not what it charges. The filing states that substantially all of cost of revenue is compute and infrastructure, and that nine infrastructure agreements total $657 billion, of which 76% — $498 billion — cannot be cancelled. Most run seven years or less: roughly $70 billion a year of fixed cost against revenue that has to keep compounding.
Noncancelable capacity changes the direction of price competition. When a provider’s unit cost is committed years ahead, a price cut is financed out of future margin rather than efficiency gains. That is not a forecast of rising API prices. It is a reason to drop the steep declines of 2023 to 2025 as a default assumption in a 2027 budget.
The mechanism that does push cost down is documented too. Anthropic routes workloads across Nvidia and AMD GPUs, AWS Trainium and Google TPUs as what the filing calls a single fungible pool. It has committed $110 billion to Trainium through 2036 and $114.5 billion to TPUs through 2033. In Q2 2026 revenue reached $11.6 billion against $5.6 billion of compute cost, 2.08 dollars per dollar spent, from 0.69 in Q4 2025.
The 900% Retention Rate Is the Buyer-Side Number
Net revenue retention was around 900% as of September 30. The median public cloud software company was at 108% in January, per Altimeter partner Jamin Ball. Customers spending more than $100,000 a year went from 950 to 11,900, which the filing attributes to workloads multiplying inside existing accounts.
“Our customers’ journey using Claude often begins with a single use case before expanding across departments, applications, and workflows. As our models become more capable, customers often deepen our partnerships.”
Anthropic, Form S-1, as reported by CNBC
For anyone signing a usage-based agreement, this is the line to plan around. Retention at that level is consumption growth, not seat growth. Your 2026 invoice is not a baseline for 2027.
Operational context: if you already pay for inference at scale, start from our breakdown of how to cut token spend without degrading output.
What Technical Teams Should Do Before the Pricing Cycle Turns
- Cost per workflow, not cost per month. A blended invoice hides which agent is burning the budget.
- Set a hard ceiling on usage lines, with alerts at 70% of committed spend rather than 100%.
- Match exit clauses to the vendor’s commitments. If they are locked into seven-year capacity, ask what protects you if the model is deprecated or repriced.
- Model a doubling before renewal. With retention near 900%, the planning case is the current bill times two, with a cap.
- Keep a second provider tested. Multi-vendor routing on your side mirrors their multi-chip routing, and it is the leverage a mid-market team holds.
Two related analyses cover the tactical side: the token cliff that can multiply agent costs at a given context size, and what happens when a large buyer caps AI spend per employee. For vendor choice on output quality, our ranking of AI coding agents uses the same cost-per-task lens.
The Risks That Are Not Financial
The filing carries more than 90 pages of risk factors, some regulatory rather than commercial. Anthropic is still contesting a Pentagon supply chain designation after the D.C. Circuit upheld the label, and warns of material revenue losses from federal actions. The FTC has requested executive testimony in a safety probe.
Verified Sources & Primary Documentation
- Anthropic — statement on filing Form S-1 with the SEC, October 26, 2026
- SEC EDGAR — Anthropic, PBC registration statement, CIK 0002130357, accession 0001628280-26-067168
- CNBC — Anthropic IPO live updates: AI lab’s S-1 filing
- Fortune — Anthropic’s S-1, by the numbers
