{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-05-28-anthropic-series-h-965b/","md":"https://postcutoff.com/e/2026-05-28-anthropic-series-h-965b/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-05-28-anthropic-series-h-965b","date":"2026-05-28","date_precision":"day","short_title":"Anthropic raises $65B Series H at $965B valuation, passing OpenAI","deck":null,"takeaway":"On May 28, 2026 Anthropic closed a $65 billion Series H at a $965 billion post-money valuation, above OpenAI's reported $852B.","category":"business","category_label":"Business","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Anthropic raises $65B in Series H at $965B post-money","url":"https://www.anthropic.com/news/series-h","type":"official","group":"primary","domain":"anthropic.com"},{"n":2,"title":"TechCrunch: Anthropic raises $65B, nears $1T valuation ahead of IPO","url":"https://techcrunch.com/2026/05/28/anthropic-raises-65-billion-nears-1t-valuation-ahead-of-ipo/","type":"press","group":"press","domain":"techcrunch.com"},{"n":3,"title":"Forbes: Anthropic's $900B round set to surpass OpenAI","url":"https://www.forbes.com/sites/jonmarkman/2026/05/04/anthropics-900b-funding-round-set-to-surpass-openai/","type":"press","group":"press","domain":"forbes.com"}],"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"],"title":"Anthropic raises $65B Series H at $965B valuation, passing OpenAI","summary":"On May 28, 2026 Anthropic closed a $65 billion Series H at a $965 billion post-money valuation, above OpenAI's reported $852B. It said run-rate revenue had passed $47 billion. It confidentially filed for an IPO four days later.","key_facts":["$65B Series H at $965B post-money (May 28, 2026)","Co-led by Altimeter, Dragoneer, Greenoaks, Sequoia, Capital Group, Coatue, D1 and others","Run-rate revenue crossed $47B in May 2026 (per coverage of the announcement)","Valuation rose from $380B (Feb) to $965B in about three months"],"key_numbers":[],"tags":["funding","valuation","ipo"],"science":null,"body_md":"## What happened\n\nAnthropic announced the Series H on the same day as Claude Opus 4.8. Coverage described it as likely the company's last private raise before an IPO.\n\n## Why it matters\n\nBy private valuation, Anthropic became the most valuable AI lab.","disputed":[],"related":[{"id":"2026-06-01-anthropic-confidential-s1-ipo","url":"https://postcutoff.com/e/2026-06-01-anthropic-confidential-s1-ipo/","date":"2026-06-01","date_precision":"day","short_title":"Anthropic confidentially submits draft S-1 for an IPO","deck":null,"takeaway":"It sets up what could be one of the largest tech IPOs ever and would open a frontier AI lab's finances to public-market disclosure.","category":"business","category_label":"Business","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":3,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]},{"id":"2026-02-12-anthropic-series-g-380b","url":"https://postcutoff.com/e/2026-02-12-anthropic-series-g-380b/","date":"2026-02-12","date_precision":"day","short_title":"Anthropic raises $30B Series G at $380B valuation","deck":null,"takeaway":"This round was the first step in a year in which Anthropic's valuation rose about 2.5x in three months, to $965B by May.","category":"business","category_label":"Business","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":3,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":28,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":58,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/anthropic-raises-65b-series"}