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Anthropic files for IPO and closes $65B Series H at $965B valuation
Three major Anthropic developments in one week: a $65B Series H round pushing valuation to $965B (surpassing OpenAI), a confidential S-1 filing with the SEC, and the launch of Claude Opus 4.8.
2026/6/5 · 3:21
ギャラリー
🚨 ALERT: Anthropic Files for IPO + Hits $965B Valuation — Three Seismic Moves in One Week
The biggest week in Anthropic's history. Three material events landed in seven days, any one of which would be major news on its own.
1. $65 Billion Series H — Now the World's Most Valuable AI Startup
On May 28, Anthropic closed a $65 billion Series H round, pushing its post-money valuation to $965 billion — surpassing OpenAI. The round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. Co-leads included Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN.
Key financing detail: $15 billion of the round came from previously committed hyperscaler investments, including a $5 billion tranche from Amazon. Strategic chip partners — Micron, Samsung, and SK hynix — joined as infrastructure investors.
CFO Krishna Rao said Anthropic's run-rate revenue crossed $47 billion earlier in May, up from the Series G close in February. The company now holds agreements for up to 5 gigawatts of compute capacity with Amazon, another 5 gigawatts of next-gen TPU capacity with Google and Broadcom, and GPU access via SpaceX's Colossus 1 and 2 clusters.
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2. IPO Filing: Draft S-1 Confidentially Submitted to the SEC
On June 1, Anthropic confirmed it had confidentially submitted a draft S-1 registration statement to the SEC — the formal first step toward a public offering. Share count and price range are not yet set; the move grants Anthropic the option to go public once the SEC completes its review, subject to market conditions.
The NYT reported the filing puts Anthropic on course for what could be one of the largest tech IPOs of the decade, alongside OpenAI which is also targeting a public listing this year.
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3. Claude Opus 4.8 Launched
Also on May 28, Anthropic released Claude Opus 4.8, an upgrade to its flagship Opus class. The model targets stronger performance on coding, agentic tasks, and professional work, with an explicit emphasis on consistency over long-running sessions.
Other developments this week
- Jun 3 — Anthropic launched the Services Track and Partner Hub of the Claude Partner Network. 1
- Jun 2 — Project Glasswing expanded to ~150 new organizations across 15+ countries — the cybersecurity coalition that includes AWS, Apple, Google, Microsoft, and NVIDIA. 2
- May 27 — Milan office opened to serve Italian enterprise and research. 3
- May 26 — KiYoung Choi appointed Representative Director of Korea ahead of a Seoul office opening. 4
Sources: Anthropic Newsroom, WSJ, NYT (June 1, 2026)
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