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The documentS–1Anthropic, PBC26 OCT 2026 · 421 PP.
01The original SEC filingThe authoritative source, in your browser.SEC · HTML 02Download the saved filingThe complete 421-page document, optimized for downloading.PDF · 46 MB 03Download the full researchFindings, customer examples, calculations, and source references.Markdown

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The information in this preliminary prospectus is not complete and may be changed. These securities may not be sold until 
the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not 
an offer to sell nor does it seek an offer to buy these securities in any jurisdiction where the offer or sale is not permitted. 

Subject To Completion. Dated           .

Class A Common Stock

Shares

Anthropic, PBC

This is an initial public offering of shares of Class A common stock of Anthropic, PBC. We are selling            shares of Class A common stock and 
the selling stockholders identified in this prospectus are selling an additional            shares of Class A common stock. We will not receive any 
proceeds from the sale of shares of our Class A common stock by any of the selling stockholders.
Prior to this offering, there has been no public market for our Class A common stock. It is currently estimated that the initial public offering price 
per share will be between $           and $          . We have applied to list our Class A common stock on the Nasdaq Global Select Market under the 
symbol “ANT.”
We have a novel capital and corporate governance structure. We are incorporated as a public benefit corporation under Delaware law, a structure 
consistent  with  our  commitment  to  artificial  intelligence  (“AI”)  safety  and  responsibility.  As  a  public  benefit  corporation,  we  are  required  to 
balance the pecuniary interests of our stockholders, the best interests of those materially affected by our conduct, and the specific public benefit 
purpose identified in our amended and restated certificate of incorporation: the responsible development and maintenance of advanced AI for 
the long-term benefit of humanity. We created our Long-Term Benefit Trust (the “LTBT”) to help ensure that Anthropic, PBC is managed in a 
manner that responsibly balances its goals as a public benefit corporation. The LTBT is intended to operate as an independent body of financially 
disinterested trustees with expertise in AI safety, national security, public policy, and social enterprise. Through a special class of common stock, 
Class T common stock, the LTBT generally has the authority to elect and remove the Class T directors, who together will constitute a majority of 
the  authorized  members  of  our  board  of  directors.  Our  Class  T  common  stock  does  not  otherwise  have  voting  rights  with  respect  to  matters 
submitted to stockholders generally and has no economic rights. Immediately prior to the completion of this offering, we will also issue a single 
share of Class F common stock, a special class of our common stock, to a limited liability company organized by our co-founders (the “Founder 
LLC”). Dario Amodei, our Chief Executive Officer and a member of our board of directors, and Daniela Amodei, our President and Chairperson of 
our  board  of  directors,  together  with  our  five  other  co-founders,  will  initially  be  the  sole  members  of  the  Founder  LLC.  Our  Class  F  common 
stock, which will be held by the Founder LLC, will be entitled to an aggregate number of votes that equals 50.1% of the total voting power of our 
outstanding shares of capital stock with respect to matters submitted to stockholders generally, including the election of our directors other than 
the Class T directors. Our Class F common stock will not have any economic rights. Upon the completion of this offering, we will also authorize a 
special  class  of  our  common  stock,  Class  E  common  stock,  which  will  be  issued  to  our  employees,  excluding  our  co-founders.  Our  Class  E 
common  stock  will  be  entitled  to  vote  only  on  certain  limited  matters  and  will  not  have  any  economic  rights.  In  addition,  we  have  authorized 
Class A common stock and Class N common stock. The rights of the holders of Class A common stock and Class N common stock are identical, 
except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and shares of Class N common 
stock  have  no  voting  rights,  except  as  otherwise  required  by  law.  The  holders  of  our  Class  N  common  stock  are  primarily  strategic  business 
partners, and shares of Class N common stock will generally convert to Class A common stock upon a sale or transfer to an unaffiliated third 
party.  Our  Class  A  common  stock  is  not  convertible.  See  the  sections  titled  “Risk  Factors—Risks  Related  to  our  Governance  Structure,”  “Our 
Governance Structure and Its Goals,” and “Description of Capital Stock” for more information.
We are considered a “controlled company” within the meaning of the Nasdaq Global Select Market corporate governance requirements. See the 
sections titled “Our Governance Structure and Its Goals,” “Management,” and “Description of Capital Stock” for additional information.
See the section titled “Risk Factors” beginning on page 26 to read about factors you should consider before buying shares of 
our Class A common stock. 

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or 
passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense. 

Initial public offering price
Underwriting discount(1)

Proceeds, before expenses, to Anthropic, PBC

Proceeds, before expenses, to selling stockholders

Per share 
$                     

Total
$                     

$                     

$                     

$                     

$                     

$                     

$                     

______________
(1) See the section titled “Underwriting” for a description of the compensation payable to the underwriters. 

To the extent that the underwriters sell more than            shares of Class A common stock, the underwriters have the option to purchase up to an 
additional            shares of Class A common stock from Anthropic, PBC at the initial public offering price less the underwriting discount. 
The underwriters expect to deliver the shares against payment in New York, New York, on or about           .

Goldman Sachs & Co. LLC
Citigroup
Deutsche Bank Securities

J.P. Morgan
BofA Securities

BMO Capital Markets

BNP PARIBAS

Mizuho

BTIG

MUFG

Cantor

Morgan Stanley

Barclays
RBC Capital Markets

Wells Fargo Securities
UBS Investment Bank

Credit Agricole CIB

Societe Generale

Jefferies

TD Securities

Capital One Securities

Macquarie Capital

Prospectus dated

[Embedded graphic 1 — OCR text]
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  1. Founders’ letterp. 3SEC
  2. Defined termsp. 12SEC
  3. Prospectus summaryp. 16SEC
  4. Risk factorsp. 38SEC
  5. Management’s discussion & analysisp. 144SEC
  6. Businessp. 190SEC
  7. Governancep. 254SEC
  8. Executive compensationp. 275SEC
  9. Related-person transactionsp. 293SEC
  10. Principal & selling stockholdersp. 299SEC
  11. Capital-stock rightsp. 303SEC
  12. Shares eligible for future salep. 318SEC
  13. Underwritingp. 327SEC
  14. Auditor change & expertsp. 345SEC
  15. Financial statements & notesp. 347SEC
  16. Part II & exhibit indexp. 413SEC

How this was made

Read in full.
Kept in context.

A snapshot of the filing dated , rather than a live record of later events.

3primary reviewers
421pages reviewed
43image instances checked

The review

Three primary reviewers read non-overlapping ranges of the complete main filing. All 43 embedded image instances were transcribed and visually reviewed, including the founders’ letter, charts, and customer case studies. Financial tables were also checked visually for dates, units, and column alignment.

A separate reviewer checked the draft’s calculations, accounting interpretations, and customer qualifications. An additional check covered the later merged findings. The result is 62 findings and 21 customer examples.

The boundary

Companion contracts and other exhibits named in the filing’s index are separate documents and were not independently reviewed. Customer outcomes, technical benchmarks, forecasts, and scientific priority claims remain attributed company or customer disclosures.

The numbers

Dollar figures are U.S. dollars. H1 means the six months ended June 30; Q2 means the three months ended June 30. The 2026 interim financial statements are unaudited. Our calculations show their inputs and are labeled separately from reported values.

Blank fields stay undisclosed. Figures with different periods, conditions, or potentially overlapping scopes are kept separate. An earlier tender price is not an IPO price.

What the evidence labels mean
Reported in filing
A company disclosure, with the period and accounting basis retained.
Company estimate / company claim
An estimate or assertion attributed to the company, with its uncertainty preserved.
Our calculation
A derived figure using cited inputs. It is not a separately reported company metric.
Customer example
A selected case study, with its measurement limits. It is not representative ROI.
Proposed / conditional
A status qualifier for an arrangement that is not yet effective or depends on stated conditions.

About updates. This edition is tied to the October 26, 2026 filing. Any later revision should identify its new source date and preserve the basis of earlier claims.

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Anthropic · Form S-1PDF 1

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Filed October 26, 2026. PDF is approximately 46 MB and opens only when requested. Section links may precede the exact cited paragraph.