What was the Supreme Court's ruling on Roundup lawsuits and what legal reasoning did it use?

The Supreme Court ruled 7–2 to block thousands of state-court lawsuits alleging Bayer failed to warn consumers that Roundup could cause cancer, holding that federal law preempts state failure-to-warn claims because the Environmental Protection Agency has determined glyphosate is not likely to cause cancer when used as directed and has approved a label without a cancer warning; the Court stated that states cannot impose additional or different labeling requirements under federal law.

How does the ruling affect John Durnell’s case and other similar lawsuits?

The ruling effectively prevents cases like that of Missouri resident John Durnell — who was awarded $1.25 million by a jury after developing non-Hodgkin’s lymphoma from long-term Roundup use but never received the money due to appeal — from proceeding in state courts, and Durnell himself acknowledged that 'thousands of cases that are like mine will not see court now.'

US Supreme Court Blocks Thousands of Lawsuits Against Bayer Over Roundup Weedkiller

Jun 26, 2026

The US Supreme Court ruled that federal law preempts state warning label requirements for Roundup, blocking thousands of lawsuits against Bayer. Despite the victory, Bayer plans to proceed with a proposed $7.25 billion class-action settlement while glyphosate safety debates continue.

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