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U.S. Court of Appeals for the Ninth Circuit

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Ninth Circuit holds that mass‑arbitration batching scheme is substantively unconscionable under California law because it creates likely lengthy delays that chill consumer claims and operate asymmetrically

August 27, 2025

Opinion

U.S. Chamber files amicus brief urging Ninth Circuit to uphold reasonable bellwether arbitration procedures designed to address the threat of extortionate mass arbitrations

January 22, 2025

U.S. Chamber Amicus Brief

Andrew J. Pincus, Archis A. Parasharami, Kevin S. Ranlett, and Jennifer L. Weinberg of Mayer Brown LLP served as outside counsel.

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