Amazon to invest an additional $5 billion in Anthropic

Matt Day and Rachel Metz, Bloomberg News on Apr 20, 2026

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Amazon.com Inc. is investing an additional $5 billion in Anthropic PBC, and may inject $20 billion more over time, a deal that deepens the companies’ ties in an increasingly competitive artificial intelligence industry.

Anthropic, which makes the Claude chatbot and coding tool, plans to spend more than $100 billion over the next 10 years on Amazon’s cloud technologies and chips, the companies said in a statement on Monday. Amazon shares gained more than 3% on the news in after-hours trading.

Amazon was already one of Anthropic’s biggest backers, with prior investments totaling $8 billion. For Amazon, the partnership has given its cloud business a leading artificial intelligence model and a major customer for its home-built Trainium line of AI chips. Anthropic, meanwhile, has had access to Amazon’s massive roster of corporate clients. More than 100,000 customers run Claude models on Amazon Web Services, the companies said.

Anthropic PBC, founded in 2021 by several former employees of OpenAI, is widely expected to list shares in an initial public offering as soon as this year. Anthropic has been racing to persuade more businesses to pay for its software to help offset the immense cost of developing AI. The company clinched a $30 billion funding round in February that valued the San Francisco startup at $380 billion, and has since drawn investor offers at a valuation of over $800 billion.

Though the company has been on a winning streak this year with popular products including its Claude Code AI tool, it’s also locked in a dispute with the U.S. government over AI safeguards — a fight that has led to legal action from Anthropic and that the company has said threatens its business.

Amazon says it remains a minority investor, and is not represented on the company’s board or trust. The size of Amazon’s investments are tied to “certain commercial milestones,” Amazon said.