Anthropic lawsuits and legal matters, as it discloses them
14 legal matters involving Anthropic: 2 it brought, 1 settled, the rest pending, each with court, status and the exact sentence from the filing that discloses it.
- Matters disclosed
- 14
- as the company lists them
- Brought by the company
- 2
- as plaintiff or petitioner
- Settled
- 1
- Bartz
- Largest settlement
- $1.5B
- approved by the court
Government actions
2Anthropic PBC v. Department of War, et al.
Brought by the company · U.S. District Court, Northern District of California · filed 2026
StatusSummary judgment largely for Anthropic on August 27, 2026; the defendants appealed the preliminary injunction
Anthropic sued after the federal government ordered agencies to stop using its technology and the Department of War labeled it a supply-chain risk. The court ruled the actions were retaliation for protected speech.
Other side: U.S. Department of War · other federal agencies
Exact text in the source (3)
“The court ruled that the Challenged Actions were retaliatory acts meant to punish us for speech protected under the First Amendment to the United States Constitution and violated our rights under the Due Process Clause of the Fifth Amendment to the United States Constitution.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Business, Legal Proceedings
“we subsequently, on August 27, 2026, obtained an order from the United States District Court for the Northern District of California that largely granted summary judgment in our favor.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Business, Legal Proceedings
“We vigorously challenged the Challenged Actions in Anthropic PBC v. Department of War, et al. (N.D. Cal.) and Anthropic PBC v. Department of War, et al. (D.C. Cir.).”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Business, Legal Proceedings
Anthropic PBC v. Department of War, et al.
Brought by the company · U.S. Court of Appeals, D.C. Circuit · filed 2026
StatusPanel denied the petition 2-1 on September 25, 2026; Anthropic asked for rehearing by the full court
Anthropic challenged the Section 4713 supply-chain risk designation. A divided panel upheld the designation.
Other side: U.S. Department of War
Exact text in the source (2)
“We filed a petition for rehearing en banc asking the full D.C. Circuit to review the panel’s decision.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Business, Legal Proceedings
“On September 25, 2026, in a 2-1 split decision, the D.C. Circuit Court of Appeals denied our petition for review, ruling that the Department of War’s Section 4713 supply-chain risk designation was proper, and that our rights under the First Amendment and Due Process Clause of the Fifth Amendment were not violated.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Business, Legal Proceedings
Copyright
8Bartz, et al. v. Anthropic
Against the company · U.S. District Court, Northern District of California · filed Aug 2024
StatusSettled for $1.5 billion; the court approved the settlement in July 2026
Authors' class action over books used to train Claude. Anthropic disputes wrongdoing but settled.
Other side: Authors (class action)
Exact text in the source (2)
“The Company reached a settlement in the amount of $1.5 billion and the interest earned thereon, which was approved by the district court in July 2026.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
“In August 2024, various authors filed suit against the Company alleging infringement of copyrighted books in the case of Bartz, et al. v. Anthropic in the U.S. District Court for the Northern District of California (“Bartz”).”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Bartz opt-out suits
Against the company · Various courts
StatusIn various stages
Authors and publishers who opted out of the Bartz settlement sued individually.
Other side: Authors and publishers
Exact text in the source
“Various authors and publishers have opted out of the class action and settlement reached in Bartz and filed individual suits against the Company, generally alleging claims of direct copyright infringement, contributory copyright infringement, and removal of copyright management information related to the use of literary works used in the training of the Company’s large language models.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Concord Music Group et al. v. Anthropic (Concord I)
Against the company · Filed in the Middle District of Tennessee; moved to the Northern District of California · filed Oct 2023
StatusBoth sides moved for summary judgment; hearing held October 21, 2026
Music publishers say Claude copied and reproduced song lyrics.
Other side: Concord Music Group · music publishers
Exact text in the source (2)
“The case was later transferred to the Northern District of California. Both parties filed motions for summary judgment and the court held a hearing on October 21, 2026.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
“In October 2023, Concord Music Group et al. filed a complaint against the Company in the U.S. District Court for the Middle District of Tennessee (“Concord I”).”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Music Publisher Matters
Against the company · U.S. District Court, Northern District of California · filed 2026
StatusPreliminary stages; some complaints also name two Anthropic executives
Several music publishers filed new complaints over lyrics and compositions in training data and outputs.
Other side: Concord Music Group · Universal Music Publishing Group · ABKCO Music · BMG Rights Management (US) LLC · Round Hill Music LP · Sony Music Publishing (US) LLC · Warner Chappell Music, Inc.
Exact text in the source (2)
“These matters are in preliminary stages.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
“Between January and October 2026, several complaints were filed against the Company in the U.S. District Court for the Northern District of California by various music publishers and their affiliated entities, including Concord Music Group, Universal Music Publishing Group, ABKCO Music, BMG Rights Management (US) LLC, Round Hill Music LP, Sony Music Publishing (US) LLC, Warner Chappell Music, Inc., and others (collectively, the “Music Publisher Matters”).”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
MacKinnon (Canadian authors class action)
Against the company · British Columbia, Canada · filed 2025
StatusPutative class action pending
On behalf of all Canadian authors, over books used for training.
Other side: Canadian authors (putative class)
Exact text in the source
“In May and July 2025, two putative class actions were filed on behalf of purported classes of Canadian authors - one in British Columbia (“MacKinnon”) on behalf of all Canadian authors, and one in Québec (“Grescoe”) on behalf of all Québec authors - each alleging violations of Canada’s Copyright Act based on the Company’s copying and use of copyrighted books to train its large language models.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Grescoe (Québec authors class action)
Against the company · Québec, Canada · filed 2025
StatusStayed until MacKinnon reaches final judgment
On behalf of all Québec authors; paused while MacKinnon runs.
Other side: Québec authors (putative class)
Exact text in the source
“Grescoe has been stayed pending a final judgment in MacKinnon.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
La Presse Inc. v. Anthropic
Against the company · Québec Superior Court · filed Jul 2026
StatusPending
A Québec news publisher says its journalism was copied into training data.
Other side: La Presse Inc.
Exact text in the source
“In July 2026, La Presse Inc., a Québec news publisher, filed a copyright infringement action against the Company in the Québec Superior Court alleging that the Company reproduced its journalistic works in the data used to train the Company’s models.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Canadian news publishers v. Anthropic
Against the company · Ontario Superior Court of Justice · filed Oct 2026
StatusPending
Publishers say their websites were copied in breach of terms and protections.
Other side: Canadian news publishers
Exact text in the source (2)
“The plaintiffs allege the Company copied their content from their websites to develop its Claude models. They further allege the Company breached the websites’ terms of service and circumvented technological protection measures.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
“In October 2026, a group of Canadian news publishers filed a claim against the Company in the Ontario Superior Court of Justice.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Patent
1University of Tennessee Research Foundation v. Anthropic PBC
Against the company · U.S. District Court, District of Delaware (1:26-cv-00887) · filed Jul 2026
StatusComplaint filed with a jury demand; no ruling found as of 30 October 2026
The foundation that licenses the University of Tennessee's patents says Anthropic's AI systems infringe two of its patents on neuroscience-inspired machine learning, and asks for damages and an order to stop. Reported as the first patent case against Anthropic. Not among the matters this file took from the S-1.
Other side: University of Tennessee Research Foundation
Exact text in the source (4)
“It asked the court for an unspecified amount of monetary damages and an order blocking Anthropic from infringing its patents.”
Anthropic sued for infringing neural network technology patents (Reuters, via The Star), 21 Jul 2026 ↗ · Reuters, paragraph 5
“The University of Tennessee Research Foundation's complaint, filed on Monday and made public on Tuesday, said that Anthropic's AI systems violate its patents on machine-learning technology inspired by neuroscience.”
Anthropic sued for infringing neural network technology patents (Reuters, via The Star), 21 Jul 2026 ↗ · Reuters, paragraph 2
“Bloomberg Law reported that the asserted patents are numbered 10,019,470 and 10,095,718, and that the complaint singles out Claude Code, Anthropic’s agentic coding tool, along with its underlying software architecture.”
University of Tennessee sues Anthropic over neural network patents, 22 Jul 2026 ↗ · The Next Web
“COMPLAINT filed with Jury Demand against Anthropic PBC”
University of Tennessee Research Foundation v. Anthropic PBC, 1:26-cv-00887, 21 Jul 2026 ↗ · Docket entry, Jul 21, 2026
Contract and data
1Reddit, Inc. v. Anthropic
Against the company · California state court · filed Jun 2025
StatusNarrowed in September 2026 to breach of contract, interference with contract and unfair competition
Reddit alleges breach of contract and other claims over Anthropic's use of Reddit data to build and run its models.
Other side: Reddit, Inc.
Exact text in the source (2)
“In September 2026, the state court narrowed the case to Reddit’s breach of contract, interference with contract, and unfair competition claims.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
“In June 2025, Reddit, Inc. filed suit against the Company in California state court alleging various claims, including breach of contract and trespass to chattels, stemming from allegations about the Company’s use of Reddit data in building and operating its models.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Consumer
1Claude subscription advertising class actions
Against the company · Various courts
StatusEarly stages
Putative class actions over how Claude subscription plans are advertised and sold.
Other side: Consumers (putative classes)
Exact text in the source
“The Company is subject to several putative class action complaints alleging that it markets and sells subscription plans for Claude through false, misleading, and deceptive advertising practices.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
Regulatory inquiries
1Government inquiries (FTC, state attorneys general and others)
Inquiry · Federal, state and foreign authorities
StatusFrom time to time
Inquiries, investigations and subpoenas on consumer protection, privacy and product safety.
Other side: U.S. Federal Trade Commission · State attorneys general
Exact text in the source
“From time to time, the Company is subject to inquiries, investigations, subpoenas and requests for information from federal, state, and foreign governmental authorities, including the U.S. Federal Trade Commission and state attorneys general, regarding, among other things, consumer protection, data protection and privacy, and the safety and security of the Company’s products.”
Anthropic, PBC, Form S-1 registration statement, 26 Oct 2026 ↗ · Notes to Consolidated Financial Statements, Legal Matters
As the company describes each matter in its own filing. Claims are allegations, and the company disputes wrongdoing where it says so. Court dockets, with every filing and ruling, come next from public court records.
Every figure on this page comes from a named document with the exact sentence it was taken from; open “Exact text in the source” under any line. People appear in public roles from the company's own filings and pages. Not investment advice.