Roundup Cancer Settlement Opt-Out Deadline Is June 4 — A New Legal Fight Could Change Everything

Bayer’s proposed $7.25 billion settlement of Roundup cancer lawsuits is moving toward a final approval hearing on July 9, 2026. But for the thousands of people who say exposure to the weedkiller caused their non-Hodgkin lymphoma, there is a decision that must be made well before then — and the deadline is less than two weeks away.

Anyone who believes they qualify for this settlement must decide by June 4, 2026 whether to stay in the settlement or opt out. Opting out means giving up any share of the settlement fund in exchange for keeping the right to pursue your own independent case against Bayer. Staying in means accepting whatever the settlement pays — and giving up the right to sue separately later.

What Roundup Is and Why It Matters

Roundup is a weedkiller made by Monsanto, which was acquired by Bayer in 2018. Its active ingredient is glyphosate. For years, the company marketed Roundup as safe — but studies have linked long-term exposure to glyphosate with non-Hodgkin lymphoma (NHL), a type of blood cancer.

Hundreds of thousands of people have filed lawsuits against Bayer, arguing that Roundup caused their NHL and that Monsanto knew about the risk and hid it from consumers. Bayer denies that Roundup causes cancer.

The $7.25 billion settlement is designed to resolve both current lawsuits and future claims — meaning it would cover people who are diagnosed with NHL in the future as a result of past Roundup exposure.

The Problem: You Must Decide Before the Supreme Court Weighs In

Here is what makes the June 4 deadline so complicated for Roundup cancer patients: the United States Supreme Court is expected to issue a ruling on a related legal question — and that ruling is not expected until after the opt-out window closes.

The Supreme Court case involves whether Bayer can be shielded from state-level failure-to-warn lawsuits by federal law. If the Supreme Court rules in favor of cancer patients, it would strengthen individual lawsuits against Bayer enormously. If it rules in Bayer’s favor, many individual cases could be harder to win.

Because the opt-out deadline comes before that Supreme Court ruling, people with Roundup-related NHL are being asked to make a permanent legal decision without knowing a critical piece of information that could affect what their case is worth if they go it alone.

A New Challenge Filed This Week

On May 22, 2026 — just days ago — a new legal filing was submitted claiming that the structure of the Roundup settlement violates the United States Constitution. The challenge argues that the way the settlement is designed unfairly restricts the rights of people who have not yet been diagnosed with NHL to pursue future cases.

This legal challenge could delay or even derail the settlement if a court agrees. For people who are weighing whether to opt out, this adds another layer of uncertainty: the settlement they would be staying in may itself face significant legal obstacles before it ever pays out.

Who May Qualify

You may be covered by the Roundup settlement if:

• You used Roundup or another glyphosate-based weedkiller, whether in a home garden, on a farm, or in the course of a job like landscaping or groundskeeping
• You were later diagnosed with non-Hodgkin lymphoma (NHL)
• Or you are a family member of someone who died from NHL after prolonged Roundup exposure

The settlement is intended to cover both people who have already filed lawsuits and people who have not yet filed but meet the exposure and diagnosis criteria.

Stay In or Opt Out — What Is the Difference?

If you stay in the settlement: You would receive a share of the settlement fund if the settlement receives final court approval. The amount you receive would depend on your medical history, how long you were exposed, and other factors. You would give up the right to pursue a separate, individual case against Bayer forever.

If you opt out: You keep the right to pursue your own case independently. You would not receive any payment from the class settlement, but you could potentially recover more — or less — depending on how your individual case plays out. Opting out is generally advisable for people who already have an attorney representing them individually in a Roundup case.

This decision is not something to make without getting legal advice first, especially given the amount of money at stake and the approaching Supreme Court ruling.