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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

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Table of Contents

Quarterly Consolidated Statements of Operations, as a Percentage of Revenue

Revenue

Operating expenses:
Compute and 
infrastructure 

Personnel

Bartz settlement
Sales, marketing, and 
partnerships
Other operating and 
administrative

Total operating 
expenses

Operating income (loss)

Interest income
Change in fair value of 
convertible notes, 
derivative liabilities, 
and SAFEs
Other income 
(expense), net

Total other income 
(expense), net
Loss before provision for 
income taxes

Provision for income taxes

Net loss

Three Months Ended

March 31,
2025

June 30,
2025

September 30,
2025

December 31,
2025

March 31,
2026

June 30,
2026

100 %

100 %

100 %

100 %

100 %

100 %

251

58

—

6

33

349

(249)

14

177

41

—

12

23

252

(152)

8

148

35

109

15

17

324

(224)

9

144

40

—

12

43

239

(139)

9

72

27

—

22

14

135

(35)

7

(1,516)

(666)

(663)

(696)

(270)

—

—

—

—

(7)

48

16

—

18

9

92

8

7

(516)

(73)

(1,503)

(658)

(654)

(687)

(270)

(582)

(1,751)

2
(1,753)%

(810)

—
(810)%

(878)

—
(878)%

(826)

—
(826)%

(305)

—
(305)%

(574)

—
(574)%

______________
Note: Totals of percentage of revenue may not foot due to rounding.

Quarterly Trends

Revenue

Revenue  increased  sequentially  in  each  of  the  quarters  presented,  from $376  million  for  the three  months 
ended March 31, 2025 to $11.6 billion for the three months ended June 30, 2026. The increases in each quarter 
were  driven  by  successive  model  and  product  releases  that  drove  higher  usage,  expansion,  and  broader 
adoption  across  our  offerings,  with  both  consumption-based  and  subscription-based  revenue  contributing. 
Growth in customers generating meaningful revenue contributed across the periods: customers with $100,000 
or more of revenue on a TTM basis grew from approximately 400 as of March 31, 2025 to more than 6,000 as 
of June 30, 2026.

Operating Expenses

Compute and Infrastructure

Compute  and  infrastructure  expenses  increased  sequentially  in  each  of  the  quarters  presented,  from $944 
million for the three months ended March 31, 2025  to $5.6 billion for the three months ended June 30, 2026, 
driven  by  the  delivery  of  committed  compute  under  our  multi-year  CSP  arrangements.  Because  we  typically 
procure compute 12 to 18 months in advance of availability, these expenses are generally fixed in the near term 
and  increased  as  committed  compute  became  available  to  us  rather  than  in  response  to  in-period  demand. 

158

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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.