Anthropic $30B Series G closes at $900B+ valuation — Sequoia, Dragoneer, Altimeter, Greenoaks co-lead, Microsoft, NVIDIA also participate, last private round before October 2026 IPO
Anthropic closed its $30 billion Series G at a $900 billion+ valuation — co-led by Sequoia Capital, Dragoneer, Altimeter, and Greenoaks, with Microsoft, NVIDIA, Founders Fund, and General Catalyst also participating. The round is expected to be Anthropic's last private capital raise before its October 2026 IPO. The valuation places the lab in the same tier as the largest pure-play AI companies and signals the most aggressive pre-IPO positioning of the AI infrastructure decade.
The capital-stack composition is the strategic piece. Co-leads spanning Sequoia, Dragoneer, Altimeter, and Greenoaks is the marquee growth-capital syndicate; participation from Microsoft and NVIDIA brings the two compute-platform anchors directly into the lab's equity structure ahead of IPO; Founders Fund and General Catalyst add depth. The combined investor mix gives Anthropic relationships across the entire AI value chain — chip vendor, cloud-platform partner, growth-capital syndicate, classic venture — before the public-markets transition. That breadth is what the October 2026 IPO needs to absorb at $900B-plus valuation.
The ARR trajectory is the financial-substance piece. Anthropic's ARR went from $9B at end of 2025 to $30B by May 2026, with 1000+ customers each spending $1M+/year and the customer base doubling in less than two months. That growth rate is what justifies the $900B valuation in equity-research terms — annualized revenue tripling over a five-month window with retention metrics consistent with enterprise SaaS. Combined with OpenAI's parallel $122B round at $852B valuation as the largest private venture raise in history, the AI-lab pre-IPO landscape has rewritten the pre-public valuation ceiling for any technology category.
WSJ — Anthropic $30B Series G close at $900B valuation May 2026 → · PitchBook — Anthropic Series G investor syndicate and pre-IPO trajectory → · Reuters — Anthropic IPO October 2026 expected timeline →