Anthropic’s IPO Filing Reveals How It Keeps Big Customers Coming Back

Anthropic, a company behind the AI system Claude, has officially filed paperwork to go public on the Nasdaq stock exchange under the ticker symbol ANT. The filing, known as an S-1, was made public on October 26, 2026. It offers a detailed look at how Anthropic has grown its business and how it plans to keep its large enterprise customers loyal.

The company’s revenue has soared dramatically in recent years. From just $41 million in 2023, Anthropic’s revenue jumped to $4.6 billion in 2025, and then to an astounding $16.3 billion in the first half of 2026 alone. This rapid growth shows how much demand there is for AI tools in business.

One key to this growth is Anthropic’s strategy of offering multiple products that work together. More than half of the company’s customers spending $100,000 or more a year use both its Claude Platform—which lets businesses build their own AI applications—and at least one of its first-party applications, such as Claude Code for coding help or Claude Cowork for general knowledge work. This is up from about 30% a year earlier.

This approach is similar to how big tech companies like Amazon and Uber expand their services to keep customers using more of their products. A business might start by using the Claude API, then add Claude Code for their developers, and later adopt Cowork for other teams. Having multiple products in one account makes customers less likely to switch to competitors.

Anthropic also supports customers with Applied AI teams that help integrate Claude into existing systems. They recently launched Ode with Anthropic, a venture with private equity firms that embeds engineers directly into client companies to develop custom AI tools. This hands-on approach helps customers get more value from Claude and encourages deeper adoption.

Distribution is another important part of Anthropic’s plan. The company sells Claude through cloud marketplaces run by Amazon Web Services, Google Cloud, and Microsoft Azure. Anthropic keeps the direct relationship with customers and pays these cloud providers a fee, which allows it to control pricing and avoid conflicts. Nearly half of Anthropic’s revenue in the first half of 2026 came through these cloud marketplaces.

Despite the impressive growth, the filing also highlights some risks. Anthropic depends heavily on a handful of large customers and cloud providers. Losing a major customer or facing difficulties in securing computing resources from its cloud partners could hurt the business. The company also warns that its cloud providers, who are also competitors, might prioritise their own needs or those of other companies they invest in.

Anthropic’s governance structure is unusual as well. The company’s seven co-founders will keep control after the IPO through a special voting arrangement, holding 50.1% of voting power. This is designed to keep the company focused on its stated mission of developing AI safely for the long-term benefit of humanity, but it means public shareholders will have limited influence.

The IPO is a major step for Anthropic, coming as AI technologies become more central to businesses worldwide. While the company has not yet set the share price or the size of the offering, its strong customer base and innovative product strategy could make it an important player in the AI industry going forward.