🔍 Read the full analysis: Could Book Piracy Claims Complicate Anthropic’s IPO Plans? on ThorstenMeyerAI.com
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TL;DR
Anthropic filed to go public one day before a new wave of attention to claims that it used pirated books in developing Claude. A 2025 judge found that training on books could be fair use but ruled that keeping pirated copies was not; a $1.5 billion settlement resolved claims by a group of authors, while separate lawsuits remain pending. The company’s S-1 describes AI-related risks, but does not say Claude is sentient or will blackmail people.
Anthropic filed to go public on October 27, 2026, as fresh attention focused on book-piracy claims tied to Claude and new lawsuits from authors. A prior federal ruling found that downloading and retaining pirated books was unlawful, while finding that training on books could qualify as fair use; the newer claims have not been decided and could add legal and reputational scrutiny as investors assess the company.
The claims have different procedural status. In Bartz v. Anthropic, U.S. District Judge William Alsup ruled in June 2025 that Anthropic’s use of books to train Claude was fair use, but that downloading millions of pirated copies and keeping them in a permanent library was not. His order described approximately 196,640 Books3 titles, at least five million copies from Library Genesis and at least two million from Pirate Library Mirror. The pirated-copy findings were made at summary judgment, before a trial on remaining issues; the case later settled.
Anthropic agreed to a $1.5 billion settlement, finally approved in July 2026, for owners of roughly 500,000 registered books. The amount works out to about $3,000 per book before fees. The agreement covers specified past conduct, requires destruction of the downloaded collections subject to legal obligations, and does not release claims about Claude’s outputs. Anthropic has denied wrongdoing and represented to the settlement court that the LibGen and PiLiMi datasets, or portions of them, were not in the training corpus of any commercially released model.
Separate opt-out authors have filed lawsuits, including Kwon et al. v. Anthropic. Those cases raise claims that have not been ruled on. The source account says a motion-to-dismiss hearing is scheduled for December 17, 2026. A Stanford Daily report named authors including Tobias Wolff and Chang-rae Lee; the source account says Lee appears as a plaintiff in one new suit but could not verify Wolff’s name on the plaintiff lists it reviewed as of August 2026.
From download to IPO
Five years, one ruling, no trial
The piracy happened in 2021 and 2022. The only ruling came in 2025. The new lawsuits are years away from a verdict.
- Jun 2021 · Jul 2022DownloadsAt least 5 million copies from LibGen (2021), at least 2 million from PiLiMi (2022); 196,640 from Books3 earlier.
- Aug 2024Bartz v. Anthropic filedThree authors sue Anthropic, on behalf of a class of book owners.
- 23 Jun 2025Judge Alsup's orderTraining on books: fair use. Scanning bought books: fair use. Pirated library copies: not fair use, to trial.
- Sep 2025$1.5 billion settlementNo trial. Anthropic denies wrongdoing; release covers conduct up to 25 Aug 2025 only.
- 13 + 15 May 2026Opt-out suitsCruz (28 plaintiffs) and Kwon (incl. Chang-rae Lee) join Cambronne and two publisher suits.
- Jul 2026Final approvalSettlement approved. Anthropic: no opt-out deal "above the Bartz claim value".
- 24 Sep 2026Motion to dismissAnthropic: claims too late, no infringing output shown, many works already released.
- 26–27 Oct 2026NowS-1 and the headlineIPO filing cites Bartz as a risk; The Stanford Daily names Stanford authors.
- 17 Dec 2026ScheduledHearingCourt hears the motion to dismiss.
- May 2027 · Jan 2028ScheduledDiscovery, then trial settingFact discovery closes 13 May 2027; trial-setting conference 11 Jan 2028.
Sources: Bartz v. Anthropic, order of 23 June 2025; settlement FAQ; joint case statement, 27 Aug 2026; Anthropic letter, 27 Jul 2026; case management order, 14 Sep 2026; Anthropic S-1, 26 Oct 2026; The Stanford Daily, 27 Oct 2026. Scheduled dates can move.
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Why Open Copyright Claims Matter
The distinction between the settled case and the new suits matters to investors because copyright exposure is not resolved across all authors or all conduct. The settlement establishes a large financial cost for one group of claims, but it is not a general license to use copyrighted books, nor does it settle the newer plaintiffs’ allegations. The pending cases could produce further costs or affect how Anthropic obtains training material, depending on their outcomes.
The IPO also puts renewed attention on how the company describes legal and product risks to prospective investors. Anthropic’s S-1 discusses risks associated with its models and the possibility of regulation, according to the source account. That does not mean the filing admits that Claude is sentient or predicts that it will blackmail users. The account says the filing refers to model behavior “resembling blackmail” in a staged safety test, debate over possible AI sentience, and concerns others have described as existential. Those are risk disclosures, not findings that such outcomes have occurred in ordinary use.
For readers, the immediate point is that the settled piracy dispute and the pending lawsuits are separate. Headlines that say a court ruled in May 2026 that Anthropic illegally trained Claude collapse the timeline and the legal issues: the cited ruling was issued in June 2025, and it distinguished training from retaining pirated copies.
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The Ruling Behind the Settlement
The 2025 case began when three authors sued Anthropic in August 2024. Judge Alsup’s June 23, 2025 order treated two practices differently: buying print books and scanning them for training was fair use, while downloading pirated books and retaining them was not. He described the training as transformative, but found the acquisition and permanent storage of pirated copies could not be excused on that basis. The court did not hold that every use of copyrighted material for AI training is lawful or unlawful.
The distinction remained important after the settlement. The court record described pirated collections and training use, while Anthropic’s settlement representation said those collections were not in the training corpus of commercially released models. The source account says the settlement resolved the claims without a jury deciding damages. It also reports that the agreement releases only specified past conduct through August 25, 2025, leaving other kinds of claims outside its scope.
Recent coverage has brought the older ruling and newer litigation together. The Stanford Daily reported that books by Stanford-affiliated writers were among the pirated copies, but the source account says it did not independently check the reported book list against the settlement database. It also identifies an error in the paper’s description of a May 2026 ruling: the relevant order was from a different case in June 2025.
““neither the LibGen or PiLiMi datasets, nor any portions of those datasets, were in the training corpus of any of its commercially released large language models.””
— Anthropic, in its representation to the settlement court
What the New Suits Could Establish
No court has ruled on the claims in the newer author lawsuits, and the pending motion to dismiss could determine which allegations proceed. The source account does not provide a complete account of each complaint, the number of works at issue across all actions, or the potential damages sought. Those details should not be inferred from the settlement’s $1.5 billion figure, which relates to a distinct group of registered books and claims.
There is also a factual dispute in how the record is being summarized. The 2025 order addressed training and pirated copies separately, while Anthropic’s settlement representation concerns whether LibGen and PiLiMi material was in commercially released models’ training corpora. The source account describes court-record evidence of copying and training use involving portions of pirated collections, but Anthropic’s statement is narrower. The exact relationship between those collections, particular training runs and released models remains contested in the material provided.
The Stanford Daily’s reported list of affected books has not been independently verified against the settlement database in the source account. Nor does the account establish that every named writer is a plaintiff in the new cases. The IPO filing’s full terms, investor response and any eventual effect of the lawsuits on the offering are also not specified.
Court Hearing and IPO Disclosure
The next stated legal milestone is the December 17, 2026 hearing on Anthropic’s motion to dismiss. A decision could narrow or allow parts of the newer authors’ claims to proceed, but the hearing itself will not decide the entire dispute. Further filings or court orders would clarify which authors, books and alleged uses remain at issue.
Investors and readers can also look to the IPO process for additional detail on how Anthropic describes litigation, potential liabilities and model-related risks in its public disclosures. The source material does not say when the offering will be completed or whether the company will amend its filing. Until more court and filing information becomes available, the confirmed picture is a settled 2025 case with a substantial payment and separate, unresolved claims.
Key Questions
Did a judge rule that all Claude training on books was illegal?
No. In June 2025, Judge William Alsup found that training Claude on books was fair use in the case before him. He separately ruled that downloading and retaining pirated copies was not excused by fair use.
What does the $1.5 billion settlement cover?
The settlement covers claims for owners of roughly 500,000 registered books associated with specified LibGen and PiLiMi downloads. It does not resolve every copyright claim against Anthropic or authorize unrestricted training on copyrighted books.
Have the newer author lawsuits been decided?
No. The claims described in the source material remain pending. A hearing on Anthropic’s motion to dismiss is scheduled for December 17, 2026.
Does Anthropic’s IPO filing say Claude is sentient or will blackmail people?
Not according to the source account. It says the S-1 discusses behavior “resembling blackmail” in a staged safety test, debate about possible AI sentience and concerns others have called existential. These are risk disclosures, not statements that Claude is sentient or will blackmail users.
Source: ThorstenMeyerAI.com
