The challenge focuses on a $611 million verdict granted to three people who claim that exposure to the company’s herbicide Roundup caused them to develop cancer. Bayer had appealed the verdict to the Court, arguing that it should be overturned because the 2023 trial for Anderson v. Montano Co. made several errors, including an assertion that the state claims should be dismissed because they were preempted by the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA). By refusing to hear Bayer’s appeal, the Missouri Supreme Court declined to rule on the question of preemption or to alter the amount of damages awarded to the plaintiff. Bayer remains involved in numerous ongoing legal proceedings of a similar nature across the United States. The question of whether FIFRA preempts the state law, claims often raised by plaintiffs in such cases, has been appealed to the United States Supreme Court, who has yet to decide whether the high court will hear the matter.