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The documentS–1Anthropic, PBC26 OCT 2026 · 421 PP.
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tenured  and  early  employees,  whose  equity  holdings  may  represent  a  significant  portion  of  their  personal 
wealth. As a result, it may be difficult for us to continue to retain and motivate these employees, and the value 
of their holdings could affect their decisions about whether or not they continue to work for us.

Historically, our ability to successfully attract, retain, and motivate our personnel has in large part been due to 
our company culture and commitment to safety and responsible scaling and development. If we are unable to 
maintain  our  culture,  if  we  make  decisions  as  a  company  that  our  employees  do  not  believe  align  with  our 
values,  or  if  events  take  place,  regardless  of  fault,  that  call  into  question  whether  we  have  operated  in 
accordance with our values, our ability to attract, retain, and motivate our personnel may be adversely affected. 
Rapid growth has also created workforce-planning and execution challenges, including limitations in our ability 
to  accurately  forecast  headcount  needs,  periods  of  accelerated  hiring  followed  by  corrective  actions  that  may 
disrupt  operations  or  reduce  morale,  and  increased  reliance  on  managers  operating  at  greater  scale  than  in 
their  prior  experience,  which  introduces  additional  operational,  legal,  reputational,  and  execution  risk  as  the 
organization continues to expand. If we move into new geographies, we will need to attract and recruit skilled 
personnel  in  those  geographic  areas,  but  it  may  be  challenging  for  us  to  compete  with  traditional  local 
employers  in  these  regions  for  talent.  If  we  fail  to  attract  new  personnel  or  fail  to  retain  and  motivate  our 
current  personnel  who  are  capable  of  meeting  our  growing  technical,  operational,  and  managerial 
requirements, our business may be adversely affected. 

In addition, heightened public attention on AI has increased physical and informational security risks, and we 
have experienced threats to employee safety and attempts to obtain confidential information through physical 
or  digital  means,  which,  despite  the  security  measures  we  have  implemented  at  certain  facilities,  may  be 
exacerbated  by  our  global  and  flexible  working  arrangements  and  could  adversely  affect  employee  morale, 
productivity, and our ability to attract, retain, and motivate highly skilled personnel. Addressing these risks also 
requires us to attract and retain additional specialized security personnel, and difficulties in recruiting qualified 
security engineers could further exacerbate these challenges.

Further,  changes  to  immigration  policies  that  restrain  the  flow  of  professional  and  technical  talent,  including 
but  not  limited  to  U.S.  immigration  policies,  may  inhibit  our  ability  to  recruit  and  retain  highly  qualified 
employees.  If  we  are  unable  to  effectively  manage  the  foregoing  risks,  our  prospects,  business,  financial 
condition, and results of operations could be adversely affected.

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  were  founded  in  2021  and  launched  our  first  commercial  product,  Claude,  publicly  in  the  first  quarter  of 
2023. During this time, our business has grown rapidly. We operate in an industry characterized by rapid and 
unpredictable  technological  change,  evolving  safety  and  regulatory  expectations,  significant  capital  and 
compute  requirements,  and  uncertain  commercial  adoption  patterns.  Our  limited  operating  history  and  our 
evolving and nascent business and industry make it difficult to evaluate our future prospects and the risks and 
challenges we may encounter. These risks and challenges include our ability to: 

•

•

•

•

•

develop and release new models and products on a timely and cost-effective basis;

accurately  forecast  our  revenue,  operating  expenses,  and  compute  requirements  in  an  environment 
characterized  by  rapid  technological  change  and  usage  patterns  that  may  scale  in  nonlinear  or 
exponential ways;

secure access to sufficient compute to meet the needs of all our workloads and manage the risks related 
to securing compute;

effectively manage our growth, including our cash flows and capital needs;

accurately predict customer demands, expectations, or requirements; 

• maintain and enhance our brand and reputation;

•

attract, retain, utilize, and motivate our highly skilled personnel;

61

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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.

The footnotes are only the beginning.Explore the findings Read the story
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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.