Artificial intelligence company Anthropic has raised another $13 billion in funding, valuing it at $183 billion, nearly tripling its valuation in March.
The Series F round was led by San Francisco-headquartered investment management firm ICONIQ, whose investment portfolio includes AI audio company ElevenLabs, Tencent Music Entertainment, Airbnb, Alibaba, Canva, Uber and Zoom.
Fidelity Management & Research Company and Lightspeed Venture Partners served as co-leads, while other investors include affiliated funds of BlackRock, Blackstone, Singaporean sovereign wealth fund GIC, Growth Equity at Goldman Sachs Alternatives, TPG, T. Rowe Price Associates, Inc. and T. Rowe Price Investment Management, among others.
Anthropic’s valuation has grown from $61.5 billion following a $3.5 billion funding round in March.
The startup, which developed large language model Claude, also counts Alphabet and Amazon among its biggest backers. In July, the Financial Times reported that Amazon is considering another multibillion-dollar investment in Anthropic.
Krishna Rao, Chief Financial Officer of Anthropic said in a blog post on Wednesday (September 3): “From Fortune 500 companies to AI-native startups, our customers rely on Anthropic’s frontier models and platform products for their most important, mission-critical work.”
“From Fortune 500 companies to AI-native startups, our customers rely on Anthropic’s frontier models and platform products for their most important, mission-critical work.”
Krishna Rao, Anthropic
“We are seeing exponential growth in demand across our entire customer base. This financing demonstrates investors’ extraordinary confidence in our financial performance and the strength of their collaboration with us to continue fueling our unprecedented growth.”
Since launching Claude in March 2023, Anthropic says its run-rate revenue had surged to about $1 billion. By August 2025, its run-rate revenue hit over $5 billion, the startup said.
Claude is Anthropic’s flagship LLM that competes directly with OpenAI’s ChatGPT and Alphabet’s Gemini. The company says it now serves over 300,000 business customers, with large accounts representing more than $100,000 in annual revenue growing nearly seven-fold over the past year.
In May 2025, the company launched Claude Code, a tool for developers. Since its launch, Claude Code has generated over $500 million in run-rate revenue with usage increasing more than ten-fold in three months, Anthropic said.
“Anthropic is on an exceptional trajectory, combining research excellence, technological leadership, and relentless focus on customers.”
Divesh Makan, ICONIQ
Divesh Makan, Partner at ICONIQ, said: “Anthropic is on an exceptional trajectory, combining research excellence, technological leadership, and relentless focus on customers.”
“We’re honored to partner with Dario and the team, and our lead investment in their Series F reflects our belief in their values and their ability to shape the future of responsible AI.”
“Enterprise leaders tell us what we’re seeing firsthand—Claude is reliable, built on a trustworthy foundation, and guided by leaders truly focused on the long term.”
The funding announcement comes as Anthropic faces legal challenges over its training data practices. The company recently settled a class-action lawsuit with authors who accused it of using copyrighted books without permission to train Claude.
During the authors’ lawsuit, Judge William Alsup found that Anthropic torrented 5 million files from the pirate online library LibGen, 2 million files from Pirate Library Mirror (PiLiMi), and nearly 200,000 records in the Books3 collection.
The resolution could influence ongoing litigation from Universal Music Group, Concord, and ABKCO, who are pursuing their own copyright case against Anthropic. The music publishers allege that Claude reproduces copyrighted lyrics without authorization.
Last month, they asked Judge Eumi K. Lee for leave to amend their complaint against Anthropic to include new allegations that Anthropic hid the fact that it used BitTorrent to pirate copyrighted lyrics.
Following its latest financing round, Anthropic said it will expand its capacity “to meet growing enterprise demand, deepen our safety research, and support international expansion.”
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