Anthropic Just Filed for an IPO. Here Is the Full Story

You may have heard of Claude.

Maybe you have used it to draft an email, summarise a report, or debug a piece of code. Maybe someone forwarded you something Claude wrote. 

Either way, the company behind it is about to become one of the most talked-about IPOs in the history of technology.

Anthropic: the AI research lab that built Claude, confidentially filed for its IPO on June 1 2026. The Nasdaq listing is planned for October 2026. The filing landed less than a week after a $65 billion funding round that pushed Anthropic’s valuation to $965 billion, past OpenAI’s $852 billion for the first time, making it the world’s most valuable startup.

Nearly $1 trillion. For a company that did not exist five years ago.

Here is everything worth understanding about it.

From $1.5 Billion to Nearly $1 Trillion — in Four Years

Anthropic’s valuation trajectory is the steepest in enterprise software history. The company went from $1.5 billion in 2022 to $965 billion in May 2026, a 643-fold increase in four years. Anthropic IPO guide

To put that in context, it took Amazon 23 years to reach a $1 trillion valuation. Anthropic is knocking on that door in four.

The fundraising timeline tells the story of how fast this space has moved:

March 2025: Series E at $61.5 billion.
September 2025: Series F at $183 billion.
February 2026: Series G at $380 billion.
May 2026: Series H at $965 billion. Anthropic IPO date

Each round was a different order of magnitude from the one before it.

How Anthropic Actually Makes Money?

Most people know Anthropic as the company that makes Claude but the business underneath is more interesting than the product.

Anthropic describes itself as a research lab. But what it has built around that research is a layered commercial ecosystem.

It starts with the AI models. Then there is the Claude Platform which lets businesses and developers build their own products using those models. Then come ready-made applications; Claude Code for software development, Claude Cowork for professional tasks like research and analysis.

The more businesses build on Claude; the more deeply it gets embedded into their operations. The more embedded it gets, the more they spend. The more they spend, the more Anthropic can invest in making Claude better. Better Claude attracts more businesses. The cycle accelerates.

Revenue flows in two ways. Usage-based where customers pay per token of information Claude processes. And subscriptions recurring fees for defined levels of access.

The numbers are extraordinary.
FY25 revenue — $4.5 billion. Growth — over 1,000% year on year. By May 2026 — revenue run rate crossed $47 billion. First half of FY26 — $16 billion. A 1,300% increase on the same period a year earlier.

80% usage-based. 20% subscriptions.

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Why the Numbers Look Scary?

Anthropic is not profitable. 

In FY25; operating loss was $8 billion. Net loss was $41 billion.

In the first half of FY26, operating loss narrowed to $693 million. But net loss ballooned to $80 billion. Almost twice the full-year FY25 loss in just six months.

Before abandoning the idea entirely; the context matters enormously.
The $80 billion net loss is not $80 billion of cash leaving the company.

A significant portion: $72 billion in the first half of FY26 is an accounting adjustment. Over the years, investors put money into Anthropic through contracts that convert into shares at a future date. When those contracts were signed, Anthropic was worth much less. 

As the valuation has risen, the shares those investors will eventually receive have become dramatically more valuable. Accounting rules require Anthropic to record that increase as an expense even though not a single rupee leaves the building.

Remove the adjustment — and the $693 million operating loss in H1 FY26 is significantly better than the $2 billion operating loss in the same period a year earlier.

The business is still burning nearly $9 billion on computing infrastructure alone. But the trajectory is moving in the right direction.

Three Risks Nobody Is Talking About

You would own shares but not much control.

Anthropic is incorporated as a Public Benefit Corporation; a governance structure that gives shareholders significantly less control than they might expect.

Anthropic’s seven co-founders including CEO Dario Amodei and President Daniela Amodei have created an entity called Founder LLC. That entity will hold 50.1% of the voting power on shareholder matters.

Public shareholders get the remaining 49.9%.

Anthropic’s rationale; they want to focus on long-term AI safety without being pressured into short-term financial decisions by public market investors. A reasonable argument. But it also means that if the founders make decisions shareholders disagree with, the tools to challenge them are limited.

Two customers account for a quarter of revenue.

Revenue concentration at this level is a meaningful risk. If either relationship changes, the impact on revenue could be immediate and significant.

Nearly half of Anthropic’s revenue in the first half of FY26 came through cloud marketplaces — many of which belong to investors including Amazon, Google and Microsoft. The same companies also supply the computing power Anthropic needs to run its models.

Its biggest investors are also its biggest suppliers.

Amazon, Google and Microsoft have financial stakes in Anthropic. They also supply the chips and computing infrastructure Anthropic runs on. When computing capacity is scarce, they could prioritise their own AI products. In fact, Anthropic has already acknowledged that it has requested more computing capacity than some partners were willing to provide.

The Bigger Picture

Anthropic’s filing lands in the most concentrated AI IPO season in market history. Cerebras debuted on Nasdaq surging 90% on day one. SpaceX targeted $1.75 trillion. OpenAI is expected to follow.

The AI capital cycle has entered a new phase.

For years, the extraordinary valuations of AI companies were private market numbers. Theoretical. Analyst-estimated. Debated in boardrooms and newsletters.

When Anthropic lists, those numbers become real. A daily market price. A live valuation that everyone can see and trade.

Whether that price reflects the genuine long-term value of what Anthropic is building or whether it reflects the peak of an extraordinary capital cycle is perhaps the most important investment debate of the next decade.

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