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The documentS–1Anthropic, PBC26 OCT 2026 · 421 PP.
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intangible  assets.  These  increases  were  partially  offset  by  proceeds  from  sales  and  maturities  of  marketable 
securities.

Net cash used in investing activities for the year ended December 31, 2024 increased by $20 million compared 
to  the  year  ended  December  31,  2023.  The  increase  was  primarily  driven  by  increased  capital  investments  in 
leasehold improvements and purchases of intangible assets. 

Cash used in investing activities was $17.2 billion for the six months ended June 30, 2026 as compared to cash 
used in investing activities of $49 million for the six months ended June 30, 2025, which primarily reflects the 
increased  purchases  of  short-term  investments,  including  commercial  paper,  U.S.  Treasury  and  agency 
securities  and  corporate  debt  securities,  in  addition  to  higher  capital  expenditures  related  to  servers, 
networking  and  infrastructure  equipment.  This  was  partially  offset  by  proceeds  from  sales  and  maturities  of 
marketable securities.

Financing Activities

Net  cash  provided  by  financing  activities  for  the  year  ended  December  31,  2025  increased  by  $12.7  billion 
compared to the year ended December 31, 2024. The increase was primarily driven by increased proceeds from 
the issuance of redeemable convertible preferred stock, net of issuance costs.

Net  cash  provided  by  financing  activities  for  the  year  ended  December  31,  2024  increased  by  $4.9  billion 
compared to the year ended December 31, 2023. The increase was primarily driven by increased proceeds from 
the issuance of convertible notes for cash and increased proceeds from the issuance of redeemable convertible 
preferred stock, net of issuance costs.

Cash provided by financing activities was $110.8 billion for the six months ended June 30, 2026 as compared to 
cash provided by financing activities of $4.7 billion for the six months ended June 30, 2025. Cash inflows from 
financing  activities  primarily  resulted from  proceeds  from  the  issuance  of  redeemable  convertible  preferred 
stock, net of issuance costs.

Off-Balance Sheet Arrangements

Other  than  hosting  services  and  lease  commitments  incurred  in  the  normal  course  of  business, funding 
commitments related to our equity method investments, and guaranty and cost reimbursement arrangements 
with  developers  to  support  data  center  capacity  development  (see  Notes 3,  7  and 13  to  our  consolidated 
financial statements included elsewhere in this prospectus for more information), we did not have during the 
periods  presented,  and  we  do  not  currently  have,  any  off-balance  sheet  financing  arrangements  or  any 
relationships with unconsolidated entities or financial partnerships.

Contractual Obligations

In aggregate, the contractual obligations in the table below plus the short-term and subsequent commitments, 
as  well  as  leases  not  yet  commenced,  each  described  in  the  paragraphs  below  are  approximately  $                   ,  
substantially all of which is related to compute and infrastructure. 

The following table summarizes our contractual obligations as of           :

Total

2026

2027

2028

2029

2030

Thereafter

Payments Due by Year

(in millions)
Operating leases(1)
Finance leases(2)
Purchase 
commitments(3)
Total(4)(5)

______________
(1) Consists of operating leases for corporate offices and compute and infrastructure with a weighted-average remaining lease term 

of            years as of           . See Note 7 to our consolidated financial statements for more information.

(2) Consists of finance leases for compute and infrastructure with a weighted-average remaining lease term of            years as of 

          . See Note 7 to our consolidated financial statements for more information.

169

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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.