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The documentS–1Anthropic, PBC26 OCT 2026 · 421 PP.
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Table of Contents

Public Benefit Corporation Status

Consistent with our long-term commitment to AI safety and responsibility, we are incorporated as a PBC under 
Delaware law. PBCs are a class of corporations that are intended to produce a public benefit and operate in a 
responsible  and  sustainable  manner.  Under  Delaware  law,  a  PBC  is  required  to  identify  in  its  certificate  of 
incorporation the public benefit or benefits it will promote, and its directors have a duty to manage the affairs of 
the  corporation  in  a  manner  that  balances  the  pecuniary  interests  of  the  corporation’s  stockholders,  the  best 
interests  of  those  materially  affected  by  the  corporation’s  conduct,  and  the  specific  public  benefit  purpose 
identified in the corporation’s certificate of incorporation. As provided in our amended and restated certificate 
of incorporation, the public benefit that we promote, which we must always consider in the management of our 
company, is the Company Purpose. 

Long-Term Benefit Trust

In 2023, we implemented an innovative governance structure featuring the LTBT, which is designed to ensure 
that  we  are  managed  in  a  manner  that  responsibly  balances  our  tripartite  goals  as  a  PBC:  the  pecuniary 
interests of our stockholders, the best interests of those materially affected by our conduct, and the Company 
Purpose.  The  LTBT  is  intended  to  operate  as  an  independent  body  of  five  financially  disinterested  voting 
trustees (“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  on  matters  submitted  to 
stockholders generally. 

Founder Voting Structure

We believe that our seven co-founders, Dario Amodei, Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, 
Sam  McCandlish,  and  Christopher  Olah,  as  a  group,  are  distinctly  equipped  to  be  stewards  of  our  mission. 
Immediately  prior  to  the  completion  of  this  offering,  we  will  issue  a  single  share  of  Class  F  common  stock,  a 
special class of our common stock, to a limited liability company of which our seven co-founders will initially be 
the sole members (the “Founder LLC”). 

Our Class F common stock 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. 

Board Governance

Decisions  regarding  our  business  and  affairs  are  made  by  our  board  of  directors. Immediately  prior  to  the 
completion of this offering, we will enter into a stockholders’ agreement (the “Stockholders’ Agreement”) with 
the LTBT and the Founder LLC, under which they will agree to vote their shares and take other actions to give 
effect  to  the  board  composition,  director  nomination,  and  director  removal  provisions  described  in  our 
governing documents. Collectively, the LTBT and the Founder LLC will have the ability to elect all members of 
our board of directors. Regardless of the class or classes of stock by which a director is elected, there is no limit 
to the number of terms a director may serve. 

While the LTBT has significant influence over our board of directors through its ability to generally elect and 
remove a majority of the authorized members of our board of directors, neither the LTBT nor the Trustees have 
decision-making authority in the day-to-day management or strategy setting of the company. The LTBT’s role is 
to select directors who are well-equipped to make decisions in furtherance of the responsible balancing of the 
pecuniary interests of our stockholders, the best interests of those materially affected by our conduct, and the 
Company Purpose, and to support our management’s decision-making through advice and guidance.

The Founder LLC will also have significant influence over our business and affairs through its ability to vote our 
Class F common stock, which is 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.

13

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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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A closer look at the filing

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.