Thomson Reuters Casetext Acquisition Antitrust Class Action

The Rubin Law Office filed a purported antitrust class action alleging that Thomson Reuters acquired lower-priced legal research competitor Casetext and integrated it into Westlaw, increasing costs for Casetext users and reducing competition. The complaint seeks class certification, damages, and structural relief, and the matter was filed in the U.S. District Court for the Northern District of California on October 1, 2026.