Cox Communications, Inc. v. Sony Music Entertainment

Docket Number: 24-171
Citation: 607/2
Term: October Term 2025
Argued: December 1, 2025
Decided: March 25, 2026
Lower Court: United States Court of Appeals for the Fourth Circuit
Author: Associate Justice Clarence Thomas
Concurring: Clarence Thomas, John G. Roberts, Jr., Samuel A. Alito, Jr., Elena Kagan, Neil M. Gorsuch, Brett M. Kavanaugh, Amy Coney Barrett, Sonia Sotomayor, Ketanji Brown Jackson

AI-Generated Summary

Case Name: Cox Communications, Inc., et al. v. Sony Music Entertainment et al.
Docket Number: No. 24–171
Dates: Argued December 1, 2025—Decided March 25, 2026
Lower Court: United States Court of Appeals for the Fourth Circuit

Sony Music Entertainment and other music copyright owners used MarkMonitor to detect illegal uploads/downloads of copyrighted works and trace them to IP addresses associated with Cox subscribers. Over roughly two years, MarkMonitor sent Cox 163,148 notices identifying infringing IP addresses.
Cox prohibited copyright infringement in its subscriber agreements and implemented a system issuing warnings, suspending service, and terminating accounts after repeated notices (e.g., termination after 13 notices), though it terminated only 32 subscribers for infringement during the period.
Sony sued Cox in the U.S. District Court for the Eastern District of Virginia, alleging contributory and vicarious liability for users' infringement. A jury found for Sony on both theories, deemed the infringement willful, and awarded $1 billion in statutory damages. The District Court denied Cox's motion for judgment as a matter of law.
The Fourth Circuit affirmed contributory liability (holding that providing service with knowledge of infringement suffices), reversed vicarious liability, vacated damages, and remanded. The Supreme Court granted certiorari solely on contributory liability and denied Sony's cross-petition on vicarious liability.

Whether an Internet service provider (ISP) like Cox is contributorily liable under the Copyright Act for subscribers' copyright infringement by continuing to provide service to IP addresses known to be associated with such infringement.
The case involves judicial interpretation of secondary (contributory) liability under the Copyright Act (17 U.S.C. §501(a)), as the Act does not expressly provide for it; draws from common-law principles and precedents like Sony (1984) and Grokster (2005).
Sony's main arguments: Cox's knowledge of infringement via notices, combined with continued service provision despite inadequate response, establishes contributory intent; Digital Millennium Copyright Act (DMCA) safe harbor implies baseline liability for serving known infringers.
Cox's main arguments: Contributory liability requires affirmative inducement of infringement or a service tailored to it (not general Internet access); mere knowledge is insufficient, and Cox actively discouraged infringement.

Author & Type: Justice Thomas, for the Majority (joined by Chief Justice Roberts, Justices Alito, Kagan, Gorsuch, Kavanaugh, and Barrett).
Holding: A service provider is contributorily liable for a user's infringement only if it intended the service to be used for infringement, shown exclusively by (1) affirmative inducement or (2) providing a service tailored to infringement (i.e., not capable of substantial or commercially significant noninfringing uses). Cox met neither criterion and thus is not liable.
Legal Reasoning: The Copyright Act imposes no express secondary liability; courts recognize only precedent-based forms (Sony, Grokster, Kalem); mere knowledge of potential misuse is insufficient (Sony, 464 U.S. at 439; Grokster, 545 U.S. at 939 n.12); inducement requires active encouragement (e.g., Grokster's promotion of infringing software); tailoring tracks patent law (§§271(b)–(c)) and Sony's Betamax holding (capable of time-shifting TV). Cox's general Internet service has substantial noninfringing uses and included anti-infringement measures; Fourth Circuit erred in creating a "knowledge-plus-supply" theory. DMCA safe harbors provide defenses but do not create liability (§512(l)).
Disposition: Judgment of the Fourth Circuit reversed and case remanded (93 F. 4th 222).

Justice Sotomayor (joined by Justice Jackson), concurring in the judgment.
Agrees Cox is not liable but rejects majority's limitation of contributory liability to two theories; precedents (Sony, Grokster) preserve other common-law secondary liability (e.g., aiding and abetting).
Applies aiding-and-abetting principles (Twitter v. Taamneh, Smith & Wesson): requires intent to facilitate wrongdoing, often inferred from substantial-certainty knowledge of specific unlawful acts. Cox lacks such intent—IP notices identify connections, not individual users; service to multi-user accounts (e.g., households, regional ISPs) shows no culpable participation; mere indifference insufficient.
Criticizes majority for undermining DMCA's balance (incentivizing ISPs to police infringement via safe harbor) and rendering it obsolete.

Reinforces strict limits on expanding secondary copyright liability beyond inducement or tailored-service theories, rejecting "knowledge of infringement plus provision of service" as sufficient; emphasizes that general-purpose technologies (e.g., Internet access) with substantial noninfringing uses cannot support contributory claims based solely on user misuse.
Clarifies DMCA safe harbors as affirmative defenses, not implying baseline liability for ISPs serving known infringers; may reduce ISP exposure to suits over user conduct while preserving incentives for anti-infringement policies.
Resolves circuit split (e.g., Fourth Circuit's broader view in BMG v. Cox) and guides future cases on online platforms' secondary liability in copyright disputes.

This summary was generated by AI and may contain inaccuracies. Refer to the official source document for the authoritative text.

Key terms: Copyright Infringement, Internet Service Providers, Online Piracy