US Supreme Court Limits Roundup Cancer Lawsuits Against Bayer

By EC Assets · Published 25 June 2026

The U.S. Supreme Court has reduced the scope of state court lawsuits against Bayer regarding its Roundup weedkiller. The ruling impacts thousands of cases accusing Bayer of failing to adequately warn users that Roundup's active ingredient causes cancer. This decision reportedly caused Bayer shares to jump by 18%. The Supreme Court overturned a Missouri jury verdict that had awarded $1.25 million to a man. This individual claimed he developed non-Hodgkin's lymphoma after years of using Roundup. The Court sided against the Missouri man who alleged the herbicide caused his cancer, backing an argument from the product's manufacturer. The Court's decision stated that users who developed cancer cannot sue under state laws claiming Roundup is dangerously unlabeled. This is due to existing warnings required by the Environmental Protection Agency (EPA). The ruling specified that states cannot have differing labeling warning rules than those mandated by federal law. The decision was reached in a 7-2 vote. More than 100,000 lawsuits concerning glyphosate, the pesticide used in Roundup, have been won, with payouts exceeding $11 billion. A federal judge previously returned Bayer's proposed $7.25 billion settlement of Roundup lawsuits to Missouri state court, overruling objections from some cancer patients. This article is intended for informational purposes only. It does not constitute investment advice.