Anthropic raises $13 billion at a $183 billion valuation

Background

Anthropic began 2025 with run-rate revenue of about $1 billion. By August 2025 that figure had grown to more than $5 billion ^[1]. Run-rate revenue takes the revenue of a recent period, such as a month or a quarter, and scales it up to a yearly figure; fast-growing private companies often report it because it describes current scale sooner than an audited annual result can.

The round

On 2 September 2025 the company announced a $13 billion Series F at a $183 billion post-money valuation ^[1]. ICONIQ led the round, with Fidelity Management & Research and Lightspeed Venture Partners co-leading ^[1]. A Series F is a late-stage private financing round, and a post-money valuation is calculated after the new money is counted, so the $13 billion sits inside the $183 billion figure rather than on top of it.

Customers

Alongside the financing, Anthropic reported more than 300,000 business customers ^[1]. It also separated out the accounts it defines as large: those generating over $100,000 in run-rate revenue. The number of such accounts grew nearly sevenfold over the year ^[1]. Because the threshold is set in revenue rather than in seats or employees, this measure tracks how much the biggest customers spend rather than how many people work at them.

Claude Code

Anthropic said Claude Code had been generating over $500 million in run-rate revenue, and that developers have made it their tool of choice since its full launch in May 2025 ^[1]. It is the one product named in the announcement as a discrete source of revenue, sitting alongside the broader customer counts.

What the money is for

Anthropic said the Series F investment would expand its capacity to meet growing enterprise demand ^[1]. That framing connects the round to the same business customers described in the operating figures: the money is presented as a way of serving demand the company says already exists, rather than as a bet on a market that has yet to appear.

How to read the numbers

The announcement put financing and operating figures side by side: a round measured in the tens of billions of dollars, revenue measured on an annualised basis, and customer counts with growth multiples attached. Each number is a snapshot taken at a particular point in 2025, and each came from the company itself rather than from an outside audit. A run-rate figure can move quickly in either direction as the months underneath it change, which is why the same metric reads about $1 billion at the start of the year and more than $5 billion by August ^[1]. The valuation, by contrast, is a price agreed between investors and the company on a single day, and it reflects what those investors expect the business to become.