The paper trail

Small print.
Wide open.

A clear path from a claim to the page it came from. Here’s the filing, the research, and how we read it.

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

Page by page

Go straight to the source.

Page references count physical pages in the saved PDF, starting at 1. The printed filing number is shown separately when available.

Enter a page from 1 to 421. No PDF download needed.

From the filing

PDF page 27

Printed filing page 16 · Extracted page text

View on the SEC
Read the page text
Table of Contents

to decline and could result in a loss of all or part of your investment. Additional risks, beyond those summarized 
below or discussed elsewhere in this prospectus, may apply to our business, activities, or operations as currently 
conducted or as we may conduct them in the future and in the markets in which we operate or may in the future 
operate. These risks include the following: 

•

•

•

Our success depends in large part on our ability to continue to develop the most advanced and capable 
AI models, and any failure to do so could adversely affect our business.

If we are unable to secure adequate compute or if we fail to direct our compute effectively across our 
workloads, we may be unable to train models that remain competitive with those of our competitors or 
adequately serve our customers.

Constraints  on  the  critical  inputs  supporting  compute  could  limit  our  ability  to  secure  adequate 
compute.

• We are highly dependent on the continued service of our co-founders, senior management team, and 
key  technical  employees,  and  the  loss  of  any  of  these  individuals  may  adversely  affect  our  business, 
financial condition, and results of operations.

•

Our  company  culture  has  contributed  to  our  success  and,  if  we  cannot  maintain  this  culture  as  we 
grow, our business could be adversely affected.

• We  face  intense  competition,  and  if  we  are  unable  to  compete  effectively,  our  business,  financial 

condition, and results of operations could be adversely affected. 

•

•

•

If  the  market  for  our  models,  platform,  and  applications  develops  more  slowly  than  we  expect  or 
declines, our growth may slow or stall, and our business, financial condition, and results of operations 
could be adversely affected.

If the use of our AI models results in harm, whether through use by malicious actors or misuse by other 
third parties, or if our model guardrails or safeguards fail to prevent such misuse, our reputation and 
brand, business, financial condition, and results of operations could be adversely affected.

Our  AI  models  may  behave  in  unintended,  misaligned,  or  autonomous  ways,  including  by  taking 
harmful actions that no user or third party directed, which could adversely affect our reputation and 
brand, business, financial condition, and results of operations.

• We may be exposed to liability, litigation, and regulatory action arising from harms associated with our 
AI  models,  and  our  contractual  protections  and  insurance  may  be  insufficient,  any  of  which  could 
adversely affect our business, financial condition, and results of operations.

•

A  substantial  portion  of  our  revenue  and  accounts  receivable  is  driven  by  a  limited  number  of 
customers and distribution channels, and the loss of, or a significant reduction in, spend from one or 
more of our top customers or disruption through those channels could adversely affect our prospects, 
business, and financial condition.

• We  have  a  limited  operating  history  in  an  evolving  and  nascent  industry,  which  makes  it  difficult  to 

evaluate our future prospects and may increase the risk that we will not be successful.

• We are at an early stage of our revenue growth, we have experienced rapid growth in recent periods, 
and  our  historical  growth  rates  are  not  indicative  of  future  performance  or  our  ability  to  sustain  or 
forecast future revenue growth.

•

•

Our business is subject to an evolving and uncertain regulatory and political environment, which could 
increase  our  costs,  restrict  our  operations,  or  adversely  affect  demand  for  our  models,  platform,  and 
applications.

Our reliance on a limited number of CSPs and suppliers, some of which have strategic and investment 
relationships with us and are our customers, creates complex dynamics that could give rise to conflicts 
of interest and adversely affect our access to compute.

16

Text is provided for reference. Check the original for tables, images, and exact formatting.

Find a section 16 starting points

Section links may begin before the exact paragraph cited in a finding. PDF numbers below use physical pages.

  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.

The footnotes are only the beginning.Explore the findings Read the story
The original, in context

Open the footnote.

A closer look at the filing

Anthropic · Form S-1PDF 1

Opening page 1…

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