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About Aimee Wagstaff

Aimee Wagstaff is the founding partner of Wagstaff Law Firm in Denver and one of the country's most prominent mass tort trial lawyers. A Kansas native raised on her family's working cattle ranch, she has spent more than a decade litigating against agrochemical, pharmaceutical, and medical device companies. Her firm filed one of the first Roundup cases in 2016, and she served for nearly a decade as national co-lead counsel of the federal Roundup litigation. As lead trial counsel in Hardeman v. Monsanto, the only federal Roundup trial to date, she won a unanimous $80,267,634 verdict in 2019; Monsanto has since paid roughly $15 billion to resolve similar claims, including over a billion dollars for her clients.

In 2015 she made MDL history when Judge Kathryn H. Vratil appointed her co-lead counsel of the Ethicon Power Morcellator MDL, the first majority-women plaintiffs' steering committee in an MDL. She also served as national co-lead counsel in transvaginal mesh litigation against Boston Scientific and was part of the trial team that won an $18.5 million verdict for four plaintiffs in the Southern District of West Virginia. She now focuses much of her time on paraquat litigation against Syngenta and Chevron and is set to serve as lead trial counsel in the first paraquat trial nationwide, in Pennsylvania state court. She founded Women En Mass in 2013, received the Colorado Trial Lawyers Association's Access to Justice award, and earned her undergraduate degree in marine science and communications from the University of San Diego, where she played on the women's soccer team, before earning her J.D. from the University of Denver Sturm College of Law.

Proven verdicts and settlements

$25,267,634 judgment ($5,267,634 compensatory plus $20,000,000 punitive after the trial court cut the jury's $75,000,000 punitive award; $80,267,634 jury verdict)Verdict

Edwin Hardeman, 70, sprayed Roundup on his Sonoma County property for about 26 years and was diagnosed with non-Hodgkin lymphoma in 2015. In the first federal Roundup bellwether trial, a unanimous San Francisco jury found in March 2019 that the herbicide was a substantial factor in his cancer and that Monsanto failed to warn, awarding $5,267,634 in compensatory damages and $75 million in punitive damages. Judge Vince Chhabria cut the punitive award to $20 million as constitutionally excessive, leaving a $25,267,634 judgment. The Ninth Circuit affirmed in May 2021 and the U.S. Supreme Court denied Monsanto's petition in June 2022.

U.S. District Court for the Northern District of California, San Francisco · 2019Product LiabilityRead the full story →
View all 2 proven verdicts →

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.

Practice areas

Education

University of Denver Sturm College of Law
J.D.
University of San Diego
Undergraduate

Bar admissions & credentials

State Bar of Colorado, admitted 2005
State Bar of California, admitted 2011
State Bar of Missouri, admitted 2018
State Bar of Pennsylvania, admitted 2025

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