Anthropic · 2026-06-01 · major
Anthropic Confidentially Submits Draft S-1 to the SEC — Files for a 2026 IPO Less Than a Week After Closing Its $65B Series H at a $965B Valuation
Anthropic, PBC tells the SEC it has confidentially submitted a draft Form S-1 for a potential IPO. Share count and price are still TBD. The filing comes four days after the Series H closed.
Anthropic puts an IPO on the table — confidential S-1 filed under Rule 135, with the number of shares and the price still to be set.
Key specs
| Valuation post series h | $965B |
|---|---|
| Series h raised | $65B |
| Filing type | confidential draft S-1 |
What is it?
A short Rule 135 announcement that Anthropic has handed the SEC a confidential draft registration statement on Form S-1. That is the document a company files when it wants the option to sell stock to the public. Confidential means the SEC reviews it privately; the IPO itself only happens later if Anthropic chooses to flip the filing public and price the deal.
How does it work?
Under the JOBS Act, an emerging-growth company can submit an S-1 confidentially, iterate with SEC staff on disclosure, and only make the document public roughly 15 days before a road show. Anthropic explicitly says the number of shares and offering price have not been determined, and that the announcement is not itself an offer to sell securities. Any sale would happen via a future prospectus filed under the Securities Act.
Why does it matter?
Anthropic is the second frontier-AI lab to formally start the IPO process — OpenAI is targeting late 2026/2027 — and it does so just days after closing a $65B Series H at a $965B post-money valuation. A public Anthropic would be the largest AI-lab listing ever and would put quarterly disclosure of Claude revenue, gross margin, and compute spend on the record for the first time.