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

To continue to grow our business, we will need to continue to expand internationally, and our 
non-U.S.  operations  and  sales  to  customers  outside  of  the  United  States  expose  us  to  risks 
inherent in international expansion, sales, and operations.

We are a U.S.-headquartered company with extensive U.S. operations, as well as subsidiaries and operations in 
several other countries and regions, including the UK, the EU, Canada, and Asia-Pacific, and we expect that our 
future  growth  will  depend  in  part  on  expanding  our  operations,  customer  base,  and  market  presence  in 
additional 
jurisdictions. Operating  in  non-U.S.  markets  requires  significant  resources  and  management 
attention and subjects us to regulatory, economic, and political risks that are different from those in the United 
States. As we continue to expand internationally, we have faced and will continue to face risks in doing business 
internationally that could adversely affect our business, including:

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the need to localize and adapt our models, platform, and applications for specific countries, including 
translation into foreign languages and associated expenses;

privacy laws, export controls, sanctions, and other national security regulations that impose different 
and  potentially  conflicting  obligations  with  respect  to  how  personal  data  is  processed  or  require  that 
customer data be stored in a designated territory;

laws in certain jurisdictions that may compel our personnel, vendors, or facility operators to provide 
governmental authorities with access to our systems, data, or other information, in some cases without 
notice to us and with limited means of recourse;

national  security-driven  data  security  regulations.  For  example,  the  Department  of  Justice  issued  a 
final  rule,  effective  in  April  2025,  that  places  limitations,  and  in  some  cases  prohibitions,  on  certain 
transfers of covered data to partners, service providers, and vendors, employees, and investors located 
in China or with other specified links to China (and other designated countries). We may be required to 
re-examine  current  contracts  or  engage  in  new  contract  negotiations  with  third  parties  that  aid  in 
processing data on our behalf or otherwise have access to covered data. These rules also may broadly 
require us to extract promises from other third-party service providers that they will not transfer data 
we share with them onward to parties linked to countries of concern;

import regulations, including U.S. and non-U.S. governments’ restrictive trade policies, customs duties 
and other parallel regulations, tariffs and counter-measures;

AI, data-related, cybersecurity and digital service laws and regulations (such as the EU AI Act, NIS2, 
the  EU  Digital  Services  Act,  the  UK  Online  Safety  Act  2023,  and  the  EU  Data  Act)  that  are  rapidly 
evolving,  require  continuous  monitoring  to  ensure  constant  compliance  maturity  level,  and  often 
provide for substantial penalties in the event of a violation;

difficulties  in  staffing  and  managing  non-U.S.  operations,  including  the  complexity  of  engaging  in 
various  employer-of-record  arrangements  that  are  geographically  dispersed,  and  the  risk  that  these 
arrangements,  or  any  failure  to  establish  local  employing  entities  on  a  timely  basis,  may  not  comply 
with  local  employment,  labor,  or  tax  laws,  exposing  us  to  fines,  penalties,  reclassification  or  back-
payment claims;

difficulties of maintaining our culture across various jurisdictions;

regulatory  and  other  delays  and  difficulties  in  setting  up  non-U.S.  operations,  including  delays  in 
forming,  registering,  and  obtaining  governmental  approvals  for  local  subsidiaries,  delays  in 
establishing  local  banking,  payroll,  and  benefits  arrangements,  and  difficulties  relating  to  safety  of 
personnel and information, any of which could delay local hiring efforts;

the potential need for reviews by the U.S. government or non-U.S. governments of certain transactions 
with non-U.S. entities;

different  pricing  environments,  longer  sales  cycles,  longer  accounts  receivable  payment  cycles,  and 
collections issues;

101

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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.