TL;DR
Anthropic announced a $65 billion Series H round at a $965 billion post-money valuation on May 28, 2026, according to the source material. The key issue is not only the valuation, but the company’s push to secure more than 10 gigawatts of compute capacity with major chip and cloud partners.
Anthropic announced Thursday, May 28, 2026, that it has closed a $65 billion Series H round at a $965 billion post-money valuation, a financing that the source material describes as the largest private round in history and a major bet on securing compute capacity for AI growth.
The round would place Anthropic ahead of OpenAI’s reported March 2026 valuation of $852 billion, according to the source material, making Anthropic the most valuable private company cited in the report. The company’s valuation has risen from $61.5 billion in March 2025 to $965 billion in May 2026, a 15.7-fold increase over roughly 14 months.
The company’s reported run-rate revenue reached $47 billion as of May 2026, up from $14 billion in February 2026, according to the same material. That revenue growth means the reported revenue multiple fell from about 27 times at the February Series G round to about 20.5 times in the Series H, even as the valuation more than doubled.
The most material detail in the announcement may be infrastructure. Anthropic named Micron, Samsung and SK hynix as strategic infrastructure partners and cited more than 10 gigawatts of compute commitments. The source material says the company has more than $200 billion in announced compute spending across multi-year contracts.
Why It Matters
The financing matters because it shows how frontier AI companies are raising capital not only to fund research and hiring, but to secure the physical infrastructure needed to train and serve large models. Anthropic’s announcement links equity financing to access to chips, memory, data centers and power capacity.
If the reported revenue figures hold, Anthropic is growing faster than any normal enterprise software comparison. But the cost side is also large. The company’s compute commitments appear to make future growth dependent on whether enough paying demand arrives as new capacity comes online.
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Background
Anthropic’s prior Series G round in February 2026 reportedly valued the company at $380 billion and raised $30 billion. The May Series H more than doubles that valuation within three months, while reported run-rate revenue rises from $14 billion to $47 billion over the same period.
The company’s cloud and infrastructure relationships span Amazon, Google, Broadcom, Microsoft, Nvidia, SpaceX and Fluidstack, according to the source material. The addition of major memory chipmakers points to a supply-chain issue: the limiting factor may be access to hardware and power rather than customer interest alone.
The source material also frames the OpenAI comparison as part of the story. Anthropic’s reported valuation would pass OpenAI’s March 2026 valuation, but the long-term test is whether the company can turn capacity commitments into durable revenue and profit.
“strategic infrastructure partners”
— Anthropic, according to the source material
“This is a capacity round dressed as a funding round.”
— Thorsten Meyer AI source material
“would make him bankrupt”
— Dario Amodei, as cited in the source material
Data Center Electrical Design: high-performance computing (HPC) facilities
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What Remains Unclear
Several details remain unclear from the source material. It does not identify all investors in the Series H, specify the exact terms of the compute contracts, or state how much of the reported revenue is net revenue rather than cloud-reseller pass-through revenue.
Profitability is also unresolved. The source material says profitability is still about two years away, while the company is committing to large infrastructure spending. It is not yet clear how quickly the added compute capacity will become available or whether customer demand will match it.
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What’s Next
The next test is execution over the next 18 to 24 months, as the committed compute capacity comes online. Investors, customers and competitors will be watching whether Anthropic can convert that infrastructure into paid usage, improve margins and keep growth ahead of its capital needs.
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Key Questions
What did Anthropic announce?
Anthropic announced a $65 billion Series H financing at a $965 billion post-money valuation on May 28, 2026, according to the source material.
Why is the round being described as a compute bet?
The announcement names major memory chipmakers and cites more than 10 gigawatts of compute commitments, suggesting the capital is tied closely to securing AI infrastructure capacity.
How does Anthropic compare with OpenAI in the source material?
The source material says Anthropic’s $965 billion valuation would exceed OpenAI’s reported March 2026 valuation of $852 billion.
What remains unclear?
The exact investor list, contract terms, net revenue profile, profitability timeline and pace of capacity deployment are not fully detailed in the provided material.
Source: Thorsten Meyer AI
