Anthropic Files for IPO After $65B Raise at $965B Valuation

Anthropic has confidentially filed to launch an IPO in the U.S. after closing a $65 billion Series H funding round at a $965 billion post-money valuation.

Anthropic becomes the most valuable AI company in Silicon Valley. The financing puts its valuation above rival OpenAI, which stood at $852 billion in late March. The round almost triples Anthropic's own valuation from February, when it was worth $380 billion.

Investors back the record round. It was co-led by Altimeter Capital, Dragoneer, Greenoaks and Sequoia Capital. Institutional participants included Baillie Gifford, Blackstone, Brookfield, D.E. Shaw Ventures, DST Global and Fidelity Management & Research, while strategic infrastructure partners Samsung, SK Hynix and Micron also joined.

Revenue run rate reaches $47 billion. The figure crossed that level earlier this month. It is up from a $30 billion run rate earlier this year and $10 billion in annual revenue last year, driven by enterprise adoption of Claude Code.

Claude Opus 4.8 launches the same day. The new model improves capabilities in agentic tasks, advanced coding, honesty and self-correction. Its release coincided with the funding announcement.

Funds target safety, compute and growth. Anthropic plans to advance safety and interpretability research, expand compute to meet demand for Claude, and scale products and partnerships. Fifteen billion dollars of the round consists of previously committed hyperscaler investments, including $5 billion from Amazon announced in April.

IPO timing stays fluid. The round could mark the company's last private fundraising before going public. Anthropic has competed closely with OpenAI on both fundraising and user growth ahead of their respective IPOs.