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As filed with the Securities and Exchange Commission on October 26, 2026. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Anthropic, PBC (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 7372 (Primary Standard Industrial Classification Code Number) 86-1696045 (I.R.S. Employer Identification Number) 548 Market Street PMB 90375 San Francisco, California 94104 (415) 326-6303 (Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices) Dario Amodei, Chief Executive Officer and Co-Founder Daniela Amodei, President and Co-Founder Anthropic, PBC 548 Market Street PMB 90375 San Francisco, California 94104 (415) 326-6303 (Name, address, including zip code, and telephone number, including area code, of agent for service) Rezwan D. Pavri Allison B. Spinner Lang Liu Colin G. Conklin Jonie I. Kondracki Lester Ang Shannon R. Delahaye Wilson Sonsini Goodrich & Rosati, P.C. 650 Page Mill Road Palo Alto, California 94304 (650) 493-9300 Copies to: Brian Israel Elena Leichty Patrick Ekeruo Scott Booth Anthropic, PBC 548 Market Street PMB 90375 San Francisco, California 94104 (415) 326-6303 Sarah K. Solum Calise Y. Cheng Phillip S. Stoup Freshfields US LLP 855 Main Street Redwood City, California 94063 (650) 618-9250 Approximate date of commencement of proposed sale to the public: As soon as practicable after this registration statement becomes effective. If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box. If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer ☐ Non-accelerated filer ☒ Accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.
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