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 334

Printed filing page 323 · Extracted page text

View on the SEC
Read the page text
Table of Contents

Our founders have agreed with the underwriters that all of the lock-up securities owned by them, other than any 
shares of Class A common stock to be sold by them in this offering pursuant to the underwriting agreement, are 
subject to the restrictions described above until the earlier to occur of (x) 6:00 AM Eastern Time on the second 
full trading day immediately following the Q3 Earnings Release Date, or (y) immediately after the close of the 
trading  day  on  the  365th  day  after  the  date  of  this  prospectus.  Notwithstanding  the  foregoing,  each  founder, 
together  with  any  other  signatories  to  such  founder’s  lock-up  agreement,  may  Transfer  up  to  29%  of  the 
aggregate number of lock-up securities held by them (as allocated among them) as of the last day of the month 
preceding the month of the date of this prospectus beginning upon the earlier to occur of (x) 6:00 AM Eastern 
Time on the second full trading day immediately following the Q1 Earnings Release Date, and (y) immediately 
after the close of the trading day on the 180th Day.

For  purposes  of  the  foregoing,  (i)  if  the  180th  Day  or  the  365th  day  after  the  date  of  this  prospectus  is  not  a 
trading  day,  references  to  the  close  of  the  trading  day  on  such  day  refer  to  the  close  of  the  last  trading  day 
immediately  preceding  such  day,  and  (ii)  if  any  day  that  is  a  specified  number  of  days  after  the  date  of  this 
prospectus, the FY26 Earnings Release Date, the Q1 Earnings Release Date, or the Q2 Earnings Release Date is 
not a trading day, the applicable Transfer may be made beginning at 6:00 AM Eastern Time on the next trading 
day.

The representatives, in their joint discretion, may release the lock-up securities described above in whole or in 
part  at  any  time.  In  certain  circumstances,  the  release  of  lock-up  securities  from  the  lock-up  restrictions 
described above will trigger a pro rata release of lock-up securities held by certain other holders.

See the section titled “Shares Eligible for Future Sale” for additional information regarding when shares of our 
Class  A  common  stock  will  be  available  for  sale  in  the  public  market  as  a  result  of  the  lock-up  and  market 
standoff agreements described above.

We, the selling stockholders, and the underwriters will agree to indemnify each other against certain liabilities, 
including liabilities under the Securities Act.

A prospectus in electronic format may be made available on websites maintained by one or more underwriters, 
or  selling  group  members,  if  any,  participating  in  this  offering.  The  representatives  may  agree  to  allocate  a 
number  of  shares  of  our  Class  A  common  stock  to  underwriters  for  sale  to  their  online  brokerage  account 
holders.  Internet  distributions  will  be  allocated  by  the  representatives  to  the  underwriters  that  may  make 
internet distributions on the same basis as other allocations.

We have applied to list our Class A common stock on the Nasdaq Global Select Market under the symbol “ANT.” 

Prior to the offering, there has been no public market for our Class A common stock. The initial public offering 
price will be determined by negotiations among us, the selling stockholders, and the representatives. Among the 
factors  to  be  considered  in  determining  the  initial  public  offering  price,  in  addition  to  prevailing  market 
conditions,  will  be  our  historical  performance,  estimates  of  our  and  our  industry’s  business  potential  and 
earnings prospects, an assessment of our management, and the consideration of the above factors in relation to 
market valuation of companies in related businesses.

In  order  to  facilitate  the  offering  of  our  Class  A  common  stock,  Morgan  Stanley  &  Co.  LLC,  acting  as 
stabilization  agent  on  behalf  of  the  underwriters,  may  engage  in  transactions  that  stabilize,  maintain,  or 
otherwise affect the price of our Class A common stock. Specifically, the underwriter may sell more shares of 
Class  A  common  stock  than  the  underwriters  are  obligated  to  purchase  under  the  underwriting  agreement, 
creating a short position. A short sale is covered if the short position is no greater than the number of shares 
available for purchase under the over-allotment option. The underwriter can close out a covered short sale by 
exercising  the  over-allotment  option  or  purchasing  shares  in  the  open  market.  In  determining  the  source  of 
shares  to  close  out  a  covered  short  sale,  the  underwriter  will  consider,  among  other  things,  the  open  market 
price  of  our  Class  A  common  stock  compared  to  the  price  available  under  the  over-allotment  option.  The 
underwriter  may  also  sell  shares  of  Class  A  common  stock  in  excess  of  the  over-allotment  option,  creating  a 
naked short position. The underwriter must close out any naked short position by purchasing shares of Class A 
common  stock  in  the  open  market.  A  naked  short  position  is  more  likely  to  be  created  if  the  underwriter  is 
concerned that there may be downward pressure on the price of our Class A common stock in the open market 
after pricing that could adversely affect investors who purchase shares of Class A common stock in this offering. 

323

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.