A class action is underway against Amazon , as nearly 300 million consumers seek justice for what they claim are artificially inflated prices caused by Amazon’s anti-discount policy imposed on marketplace merchants.
Class Certification and Consumer Reach Consumers, led by attorneys Steve Berman of Hagens Berman Sobol Shapiro LLP and a coalition including Quinn Emanuel Urquhart & Sullivan LLP and Keller Postman LLC , asked a Washington federal judge to certify a class comprising 288 million customers who made tens
of billions of purchases from over 2.5 million third-party sellers from May 2017 onward. This sprawling class action— De Coster, et al. v. Amazon.com Inc., Case No. 2:21-cv-00693, U.S. District Court for the Western District of Washington —is now recognized as one of the largest ever certified in U.S.
https://www.hbsslaw.com/press/amazoncom-antitrust-de-coster/judge-certifies-largest-class-in-us-history-in-consumer-antitrust-lawsuit-against-amazon.
Judge John Chun unsealed his class-certifying order on September 2, 2025 and commented, The court finds that plaintiffs have met their burden regarding commonality, predominance, and the rule’s other requirements.
Details of the Alleged Amazon Practices Plaintiffs argue Amazon forced an “anti-discount policy” upon third-party sellers, actively monitoring the marketplace and using billions of autogenerated messages to ensure strict price parity…
