Roundup Waldenström Macroglobulinemia Lawsuit | 2026 Latest Updates

Plaintiffs allege that Roundup, the glyphosate weed killer made by Monsanto, a Bayer subsidiary, causes non-Hodgkin lymphoma. This group of blood cancers includes Waldenström macroglobulinemia (WM). Monsanto denies the claim and any wrongdoing. The claims are pending in MDL No. 2741, a federal multidistrict case based in California. A proposed class settlement of up to $7.25 billion awaits final approval, and its official List of NHL Subtypes names WM. On June 25, 2026, the Supreme Court held in Monsanto Co. v. Durnell that federal law preempts a state-law failure-to-warn claim over Roundup’s label.

Latest Roundup Waldenström Macroglobulinemia Lawsuit Updates

October 1, 2026: JPML Report Lists 1,104 Pending Actions

The Judicial Panel on Multidistrict Litigation (JPML) report listed 1,104 actions pending in MDL No. 2741 on October 1, 2026. The count was 3,925 on September 1, 2026 and 3,932 on August 3, 2026 [1]. MDL No. 2741 centralizes Roundup actions in the Northern District of California before Judge Vince Chhabria. The Panel created it by a transfer order dated October 3, 2016.

September 14, 2026: Fairness Hearing Held on Class Settlement

The Missouri court held the fairness hearing on the proposed class settlement of Roundup claims against Monsanto on September 14, 2026. The court has not yet ruled on final approval. The settlement FAQs say registration and claim submission are unavailable until the court grants final approval. They say it is not known how long the decision will take [2].

July 27, 2026: Supreme Court Issues Durnell Judgment

The Supreme Court issued its judgment and mandate in Monsanto Co. v. Durnell, No. 24-1068, on July 27, 2026, according to the Supreme Court docket [3]. John Durnell sued Monsanto in Missouri state court in 2019. Durnell claimed that about 20 years of using Roundup caused his non-Hodgkin’s lymphoma. After a nine-day trial, a jury awarded him $1.25 million in compensatory damages on a failure-to-warn claim.

June 25, 2026: Supreme Court Decides Durnell 7-2

The Supreme Court decided Monsanto Co. v. Durnell 7-2, reversing the Missouri judgment and remanding. The Court’s opinion holds that FIFRA expressly preempts Durnell’s state-law failure-to-warn claim [4]. The claim would require a cancer warning on Roundup’s label that the EPA has not required. The opinion states that EPA has repeatedly concluded glyphosate is not likely to cause cancer.

June 17, 2026: Federal Judge Remands Class Settlement Case

Federal judge Henry E. Autrey, of the Eastern District of Missouri, sent the class settlement case, King v. Monsanto, back to Missouri state court on June 17, 2026. In a Monsanto statement on Bayer’s website, the company said the order returned jurisdiction over the class settlement to Missouri state court [5].

March 4, 2026: Court Grants Preliminary Approval of Settlement

The Missouri court granted preliminary approval of the class settlement on March 4, 2026, according to the dates posted on the settlement website [6]. The fairness hearing was set for September 14, 2026 at 9:30 a.m. CT. The opt-out and objection deadlines were both June 4, 2026. A person who opted out receives no settlement money, keeps the right to file their own lawsuit and cannot object.

February 17, 2026: Monsanto Announces Class Settlement of up to $7.25 Billion

Monsanto announced a proposed nationwide class settlement of current and future Roundup claims alleging non-Hodgkin lymphoma [7]. Monsanto filed it in the city circuit court in St. Louis, Missouri. Monsanto would fund it with up to $7.25 billion, paid through capped annual payments that decline over up to 21 years. The List of NHL Subtypes filed with it names the lymphoma types it covers [8].

January 16, 2026: Supreme Court Agrees to Hear Durnell

In case No. 24-1068, the Supreme Court granted a petition from Monsanto, Roundup’s maker, for review on January 16, 2026, according to the Supreme Court docket. The Court limited its review to one question: whether FIFRA preempts a label-based failure-to-warn claim where EPA has not required the warning. It answered that question in its June 25, 2026 decision.

July 20, 2020: Court of Appeal Cuts Johnson Judgment

In Johnson v. Monsanto, the California Court of Appeal reduced the Dewayne Johnson judgment against Monsanto on July 20, 2020. The reduced judgment is $10,253,209.32 in compensatory damages and $10,253,209.32 in punitive damages [9]. A San Francisco Superior Court jury had found for Johnson on failure-to-warn and design-defect theories. It awarded about $39.3 million in compensatory damages and $250 million in punitive damages.

March 27, 2019: Jury Awards Hardeman $80 Million

NPR reported that a San Francisco jury awarded Edwin Hardeman $80 million in damages on his claim that Roundup caused his non-Hodgkin lymphoma [10]. Hardeman, 70, of Sonoma County, was diagnosed in February 2015. According to his lawsuit, he had used Roundup on his 56-acre property for more than two decades. Bayer said it would appeal the verdict.

March 20, 2015: IARC Classifies Glyphosate as Probably Carcinogenic

IARC announced that its Working Group had classified glyphosate as “probably carcinogenic to humans” (Group 2A) [11]. The 17 experts from 11 countries met March 3 to 10, 2015. The classification is based on “limited” evidence in humans for non-Hodgkin lymphoma and “sufficient” evidence in experimental animals. IARC defines limited evidence as a positive association where chance, bias or confounding could not be ruled out.

What Is Waldenström Macroglobulinemia?

According to Dana-Farber Cancer Institute, Waldenström macroglobulinemia (WM) is an uncommon blood cell cancer that starts in malignant B-cells. It is a slow-growing non-Hodgkin lymphoma, with about 2,000 to 3,000 U.S. diagnoses each year [12]. MedlinePlus calls WM a cancer of the B lymphocytes, a type of white blood cell, and says it is very rare [13]. WM matters here because it is a non-Hodgkin lymphoma, the cancer alleged in the Roundup litigation.

Who May Be Affected?

The class settlement covers people exposed to Roundup or other glyphosate “Roundup Products” in the United States before February 17, 2026. They must have been U.S. citizens or living in the U.S. on March 4, 2026. Subclass 1 is people diagnosed with non-Hodgkin lymphoma as of March 4, 2026. Subclass 2 is people not yet diagnosed, who can claim only if diagnosed later. Hodgkin’s lymphoma and multiple myeloma are not covered. The settlement website names “Farmers, Landscapers, Groundskeepers, Gardeners, and Others Exposed to Weed Killers.” Its List of NHL Subtypes names “Lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia.” A legal review looks at each person’s own facts, and being on the list does not by itself mean a person qualifies. For the wider litigation, see the Roundup lawsuit overview.

Reported Injuries or Damages

The Roundup lawsuits allege that glyphosate causes non-Hodgkin lymphoma, which includes WM. The December 2017 EPA human health risk assessment concluded that glyphosate is not likely to be carcinogenic to humans [14]. A 2019 meta-analysis by Zhang and colleagues looked at the highest glyphosate exposure groups. It found a meta-relative risk of non-Hodgkin lymphoma of 1.41 (95% CI 1.13 to 1.75), an increase of 41% [15]. The Agricultural Health Study followed 54,251 pesticide applicators, and 82.8% of them used glyphosate. Andreotti and colleagues reported no statistically significant link to cancer at any site. None was apparent with NHL or its subtypes [16]. The InterLymph pooled analysis by Vajdic and colleagues covered 374 LPL/WM cases and 23,096 controls [17]. It used job titles rather than chemicals such as glyphosate. Forestry work was associated with higher risk (OR 3.17, 95% CI 1.08 to 9.34) on four exposed cases. Other farming or animal-related work and farm residence were not. The settlement list also names diffuse large B-cell lymphoma and chronic lymphocytic leukemia, covered on our Roundup DLBCL lawsuit and Roundup CLL lawsuit pages.

Evidence to Preserve

Keep these records together, because they show the diagnosis and the exposure:

• Medical records showing the WM diagnosis and its date, including bone marrow biopsy and IgM blood test results.
• Treatment history and medical bills, including the dates of each treatment.
• Records of Roundup or other glyphosate product use, such as purchase receipts and photos of containers and labels.
• Job, employer or landscaping records showing herbicide work and the years of exposure.
• Notes on where, how often and how long the product was applied.
• Names of people who saw the product being used.
• Settlement notices and any registration emails.

Filing Deadlines

State law sets the deadlines for an individual legal claim. They differ with where you live and when the exposure, illness and diagnosis occurred. Some states count from the diagnosis date. Missing a deadline can end a WM claim, however strong the facts are. Anyone weighing a claim should talk to a lawyer soon. The class settlement has its own claim dates, separate from state deadlines. People diagnosed as of March 4, 2026 register within 180 days after final approval. They file a claim within 180 days after any appeals are resolved.

Potential Compensation

A successful claim may lead to damages for medical expenses, lost income, and pain and suffering. Compensation amounts vary by case. Past results do not guarantee future outcomes. Potential compensation reflects each person’s diagnosis and exposure records.

Frequently Asked Questions

Is Waldenström Macroglobulinemia Curable?

Dana-Farber says Waldenström macroglobulinemia “is incurable and will return despite treatment.” Many people lead active lives and may go years without symptoms. Not every patient needs treatment right away, and Dana-Farber says some benefit from a “watchful waiting” approach.

What Causes Waldenström Macroglobulinemia?

The exact cause of Waldenström macroglobulinemia is unknown, according to MedlinePlus. It says hepatitis C may increase the risk. Dana-Farber lists male sex, age, Ashkenazi Jewish heritage and family history as risk factors.

What Does the Research Say About Roundup and Waldenström Macroglobulinemia?

On Roundup and Waldenström macroglobulinemia, no study measures glyphosate exposure in people with WM. EPA is updating its glyphosate human health risk assessment and anticipates finishing in late 2026. In August 2026 EPA released an open-literature search for comment through September 24, 2026.

Is Waldenström Macroglobulinemia Covered by the Roundup Settlement?

Waldenström macroglobulinemia is named in the proposed Roundup settlement’s List of NHL Subtypes. Covered conditions also include follicular lymphoma, hairy cell leukemia and any leukemia with “lymphoma,” “lymphocytic” or “prolymphocytic” in its WHO name.

Did the Supreme Court End Roundup Cancer Lawsuits?

The Supreme Court’s Durnell ruling did not decide whether Roundup causes cancer. Justice Kavanaugh wrote the 7-2 opinion, and Justice Jackson dissented, joined by Justice Gorsuch. The Court decided only whether federal law preempts a label-based warning claim.

References

1. https://www.jpml.uscourts.gov/sites/jpml/files/Pending_MDL_Dockets_By_Actions_Pending-October-1-2026.pdf
2. https://www.weedkillerclass.com/Home/FAQs
3. https://www.supremecourt.gov/docket/docketfiles/html/public/24-1068.html
4. https://www.supremecourt.gov/opinions/25pdf/24-1068_n7ip.pdf
5. https://www.bayer.com/media/en-us/federal-judge-remands-monsanto-class-settlement-case–back-to-missouri-state-court/
6. https://www.weedkillerclass.com/
7. https://www.bayer.com/media/download/845805d7-83cd-4432-be57-26bba5a14bdf/2026-0034e.pdf
8. https://www.weedkillerclass.com/Docs/List_of_NHL_Subtypes.pdf
9. https://www.courts.ca.gov/opinions/archive/A155940.PDF
10. https://www.npr.org/2019/03/27/707439575/jury-awards-80-million-in-damages-in-roundup-weed-killer-cancer-trial
11. https://www.iarc.who.int/featured-news/media-centre-iarc-news-glyphosate/
12. https://www.dana-farber.org/cancer-care/types/waldenstroms-macroglobulinemia
13. https://nlm.nih.gov/medlineplus/ency/article/000588.htm
14. https://www.epa.gov/ingredients-used-pesticide-products/glyphosate
15. https://pmc.ncbi.nlm.nih.gov/articles/PMC6706269
16. https://pubmed.ncbi.nlm.nih.gov/29136183/
17. https://pmc.ncbi.nlm.nih.gov/articles/PMC4155457