The following amicus briefs were submitted to the Court in support of the Petitioner in Costco v. Omega:
- The American Library Association, the Association of College and Research Libraries, and the Association of Research Libraries in Support of Petitioner (PDF)
- The Retail Industry Leaders Association, the National Association of Chain Drug Stores, Amazon.com, Inc., Gamestop Corp., Quality King Distributors, Inc., Sam's West, Inc., and Target Corporation in Support of Petitioner (PDF)
- Public Citizen in Support of Petitioner (PDF)
- The Entertainment Merchants Association, and the National Association of Recording Merchandisers in in Support of Petitioner (PDF)
- Public Knowledge, American Association of Law Libraries, American Free Trade Association, the Electronic Frontier Foundation, Medical Library Association, and the Special Libraries Association in Support of Petitioner (PDF)
- Ebay, Inc., Google, Inc., NetCoalition, the Computer and Communications Industry Association, and the Internet Commerce Coalition in Support of Petitioner (reprint) (PDF)
- Intel Corporation in Support of Petitioner (PDF)