Over Half of Anthropic’s $100K Clients Now Use Two Products

Over 50% of Anthropic’s customers with $100,000 or more of trailing twelve-month revenue used both Claude Platform and at least one of its first-party applications in the three months to 30 September 2026, according to the Form S-1 Anthropic filed with the SEC on 26 October 2026. That was up from approximately 30% in the three months to 31 December 2025.

The same filing counts more than 1,900 customers at $1 million or more and approximately 250 at $10 million or more as of 30 September 2026. Its risk factors add that many of its contracts let customers reduce usage or terminate with limited or no notice.

Two Products per Large Customer

The S-1 describes Claude Platform as the layer that gives developers the primitives Anthropic uses itself, and its first-party applications as ready-to-deploy products built on that platform. It presents the overlap as evidence for that design: “We believe the value of this integrated approach is reflected in the increasing number of customers that use both Claude Platform and our first-party applications.”

It ties the move up the revenue tiers to the same behaviour: “In addition, as customers further embed Claude into their most critical workflows and growth initiatives, many rapidly expand their deployments into higher revenue tiers.”

Source: Anthropic, PBC Form S-1, filed with the SEC on 26 October 2026, Prospectus Summary and Management’s Discussion and Analysis. Counts as of 30 September 2026 unless stated. TTM = trailing twelve months.

Where the Revenue Sits

The filing gives the revenue that its $100,000-plus customers bring in. It was approximately $37 million in 2023, $220 million in 2024 and $3.5 billion in 2025, or 90%, 57% and 76% of total revenue. In the first half of 2026 it was $12.0 billion, approximately 74% of the total, against $870 million and approximately 75% a year earlier.

Source: Anthropic, PBC Form S-1, filed with the SEC on 26 October 2026, Prospectus Summary and Management’s Discussion and Analysis. The trailing-twelve-month figure and share to 30 September 2026 are left blank in the filing.

The rest of trailing revenue to 30 September 2026 came from approximately 40 million customers each below $100,000, the S-1 says. On the largest companies, it says: “Despite this growth, our penetration into the largest enterprises remains early.”

What Retention Means in This Filing

The S-1’s retention measure is Net Revenue Retention, approximately 900% as of 30 September 2026, as our NRR piece reported. The filing defines it by comparing a quarter’s revenue from qualified customers with their revenue in the same quarter a year earlier, and excludes Claude Pro and Max subscribers.

The risk factors set out the other side. “Many of our customer contracts allow customers to reduce usage or terminate with limited or no notice.” They add: “Customers are not obligated to renew their subscriptions or contracts with us.” Among the reasons usage could fall, they list “customers developing their own AI capabilities internally”.

Connecting the Coverage

Our NRR piece reported the approximately 900% figure and the customer-tier counts. Our customers piece reported that the top five customers made up about 25% of revenue in the nine months to 30 September 2026. Our S-1 piece covered the headline numbers. What is new here is the multi-product share and how much of revenue the $100,000-plus group carries.

The Structural Read

As we read it, the S-1 offers multi-product use and the climb into higher revenue tiers as its evidence that large customers stay and expand, rather than a gross retention or churn rate.

The revenue split shows where that matters: customers paying $100,000 or more brought in approximately 74% of first-half 2026 revenue, while approximately 40 million smaller customers shared the rest of trailing revenue, by the filing’s account.

As we read it, the contract terms cut the other way: the risk factors say many customers can reduce usage or terminate with limited or no notice and are not obligated to renew, so the expansion the filing reports rests on continued use rather than locked-in commitments.

Three Implications

FOR ENTERPRISE BUYERS The S-1 reports that over half of Anthropic’s $100,000-plus customers buy both the platform and at least one application, and that many contracts allow usage to be reduced or terminated with limited or no notice.

FOR INVESTORS The filing’s retention measure is Net Revenue Retention on a quarterly basis that excludes Claude Pro and Max subscribers; we found no gross retention or churn rate in it.

FOR COMPETITORS The S-1 says over 50% of the Fortune 500 were customers with $100,000 or more of revenue on a TTM basis as of 30 September 2026, and calls its penetration of the largest enterprises early.

The Business Engineer Lens

This story maps onto the Business Engineer framework The Agentic Harness War.

The framework describes Anthropic’s strategy this way: “Anthropic is betting on many harnesses, embedded where work already lives.”

As we read it, the S-1’s multi-product figure is the customer-side count of that bet: more large customers using the platform alongside at least one of Anthropic’s own applications. The framework was published in July 2026 and does not discuss this filing.

What Is Not Established

We found no gross revenue retention, renewal rate or churn rate in the filing; its retention figure is Net Revenue Retention. The multi-product shares cover single quarters, and the passage does not say how many applications each customer uses beyond “at least one”. The filing leaves the trailing-twelve-month revenue from $100,000-plus customers blank. It says its operating metrics “have not been independently verified by third parties”.

The Bottom Line

Anthropic’s S-1 says over 50% of its $100,000-plus customers used Claude Platform and at least one first-party application in the third quarter of 2026, up from approximately 30% at the end of 2025. Those customers brought in approximately 74% of first-half 2026 revenue. The same filing says many of its contracts let customers reduce usage or terminate with limited or no notice.