Anthropic confidentially files for IPO at $965B; closes $65B Series H funding
Anthropic announced June 1 that it filed a confidential S-1 with the SEC for an initial public offering, targeting a Nasdaq listing in October 2026. The filing came days after the Claude maker closed a $65 billion Series H funding round, pushing its post-money valuation to $965 billion—up from $380 billion in March. The IPO filing makes Anthropic the first pure AI lab to publicly announce its intent to go public, beating rival OpenAI (which filed confidentially June 8 at an $852 billion private valuation) and signaling a race to capital markets.
Anthropic's public financials paint a rosy picture: annualized revenue surged to $47 billion in May 2026, a 5x increase from $9 billion in January, driven primarily by API sales and its agentic Claude Code tool. The company is projecting quarterly profitability. The IPO is expected to be one of the largest in history, with proceeds potentially exceeding $60 billion, underwritten by Goldman Sachs, JPMorgan, and Morgan Stanley.
For practitioners, Anthropic's market entry ahead of OpenAI signals confidence in unit economics and a race to scale on agentic workflows. The timing matters: both companies are preparing IPOs amid $600+ billion in annual hyperscaler capex, forcing frontier labs to demonstrate that API revenue and derivatives (Claude Code, enterprise SaaS) can actually offset training costs. Wall Street will scrutinize burn rates, customer concentration (what percentage of revenue comes from Meta, Google, or other single customers), and whether $47B annualized ARR is sustainable or a Q2 spike. Q3 and Q4 results—and the timing of any model delays—could reshape investor appetite.
Sources
- Primary source
- informedclearly.com
“Anthropic, the AI safety company behind the Claude model family, confidentially filed its S-1 with the SEC on June 1, 2026, targeting a Nasdaq listing in October. The company raised $65 billion in Series H just days before filing, pushing its valuation to $965 billion — up from $380 billion in March. Annualized revenue surged to $47 billion in May, a 5x increase from $9 billion in January, driven primarily by API sales and its agentic coding assistant, Claude Code.”
- techcrunch.com
“OpenAI, which was last valued at $852 billion post-money, submitted a draft registration statement to the U.S. Securities and Exchange Commission for a proposed IPO. The filing comes a little more than a week after its main rival, Anthropic, also filed to go public.”
- cnbc.com
“CEOs including OpenAI's Sam Altman, Anthropic's Dario Amodei, Google DeepMind's Demis Hassabis, alongside around a dozen other tech leaders, will take part in a lunch meeting at the summit in Evian. Frontier AI risks, infrastructure and sovereignty are all expected to be discussed.”