Anthropic raises $65B and resets the private AI valuation ceiling

Anthropic's May 28 financing is the largest startup-scale AI capital event in the current feed. The company says it raised $65B in a Series H led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, valuing Anthropic at $965B post-money. Axios notes that this pushes Anthropic above OpenAI's most recent reported valuation and makes it the most valuable AI startup. The round includes $15B of previously committed hyperscaler investments, including $5B from Amazon, and adds infrastructure partners Micron, Samsung, and SK hynix. Anthropic also says run-rate revenue crossed $47B earlier in May and points to new compute agreements with Amazon, Google and Broadcom, and SpaceX. The story is not just valuation theater: it shows frontier AI companies becoming capital-intensive infrastructure businesses where cloud capacity, memory supply, and enterprise distribution matter as much as model quality.

Key details: Anthropic, $65B Series H, $965B post-money valuation, May 28, 2026, Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital.

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