Does sec.gov show an effective S-1?
The amendment is public and was not effective on 11 November 2026.
Checked 11 November 2026. Anthropic has filed for an IPO, and the registration statement is not effective. The registration statement is not effective, so the filing range is the reference until the offer prices.
Searches for Anthropic IPO prospectus S-1 September 2026, Anthropic IPO S-1 September 2026, Anthropic S-1 IPO September 2026, sec.gov Anthropic IPO S-1 2026 sec.gov, sec.gov Anthropic IPO S-1 Anthropic PBC sec.gov and Anthropic S-1 IPO filing September 2026 do not create a September effective date. The public amendment is dated 10 November 2026 and was not effective on 11 November.
The regulator for this filing is the US Securities and Exchange Commission. This site is not reproducing the prospectus. This is Nasdaq filing. The SCA does not approve this US registration statement.
On 26 October 2026 the company said the number of shares and the price range were not yet set. On 10 November 2026 the amendment set out 825 million Class A shares and a preliminary range. The cover still says the information is not complete and may change. An amendment is not a declaration that the filing is effective.
An S-1 is the US registration statement for a first sale of shares to the public. Read the EDGAR text rather than a search snippet. IPO date
Figures move. If a later amendment changes the range, the share count or the status, the filing replaces what is written here.
The amendment is public and was not effective on 11 November 2026.
One short form starts the process, then the deposit step opens access.
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