
When you refer a mass tort case to Wisner Baum, you're partnering with seasoned trial lawyers who have faced down some of the world's largest corporations—and won.
A lot of mass tort law firms think in terms of case volume and settlements. Wisner Baum is different.
Our attorneys only take on litigations that we are prepared to lead. That means handling all aspects of the case through trial. Our knowledge, experience, and trial success has made us the law firm that other firms rely on to get results.
In an era when most firms have never seen the inside of a courtroom in a mass tort, Wisner Baum has secured historic jury verdicts in high-stakes litigation:
These weren't settlements negotiated in a conference room. They were verdicts won in front of juries against a corporation with seemingly unlimited resources and top-notch defense counsel. Our success at trial has translated directly into success in settlement.
In 2020, our firm helped negotiate Roundup settlements worth over $10 billion.
Mass tort litigation lives or dies on the science. Our attorneys don't just hire any experts—we hire the best and brightest in their respective fields. Our attorneys have spent decades building relationships with leading scientists, physicians, and academic researchers who serve as experts in our cases. When your client's case requires credible expert testimony, we have the experts and know-how necessary to support it.
Our attorneys understand the medicine, toxicology, and epidemiology. Decades of experience in pharmaceutical litigation (Paxil, Risperdal, Zyprexa, Zantac), toxic exposure cases (Roundup, toxic baby food, paraquat), and product liability (medical devices, and defective consumer products) have made this depth of knowledge second nature to our legal team.
Mass tort cases against Fortune 500 companies require substantial investment in discovery, expert retention, and trial preparation. Wisner Baum has the resources and staffing to go the distance—whether that means funding years of litigation or staffing trial that last many weeks. Our Los Angeles, San Francisco Bay Area, and Washington D.C. offices give us a national footprint to handle any major litigation nationwide.
When you refer a client to Wisner Baum, your name will always be attached to their experience and case outcome. We treat every referred case with the understanding that two reputations are under the microscope: ours and yours. That means responsive communication, transparent case updates, and the highest level of attention and dedication that every client deserves.
Wisner Baum focuses exclusively on mass tort, class action, and complex product liability litigation. Our current active litigations include:
If you have a potential mass tort or class action case that you are looking to refer, Wisner Baum is here to help. Please contact us directly at (310) 207-3233 or email [email protected] to discuss with our experienced attorneys.
"Wisner Baum gave exceptional attention to all aspects of the case, detailed inquiry, and tenacious overview of all the information submitted. The paralegals are efficient and diligent. I was completely surprised to find an empathic personal message to take care of my own health during the challenging time of being a full-time caretaker.*"
In May of 2019, the jury in the case of Pilliod et al. v, Monsanto Company ordered the agrochemical giant to pay $2.055 billion in damages to the plaintiffs, Alva and Alberta Pilliod, a Bay Area couple in their 70s. R. Brent Wisner served as co-lead trial attorney for the Pilliods, delivering the opening and closing statements and cross-examining several of Monsanto’s experts. Wisner Baum managing shareholder, Michael Baum and attorney Pedram Esfandiary also served on the trial team in the Pilliod case.
The judge later reduced their award to $87M. Monsanto appealed the Pilliod’s verdict which the California Court of Appeal for the First Appellate District denied on August 9, 2021. Monsanto then requested the California Supreme Court review the appeal’s court decision, which the court denied on Nov. 17, 2021. Monsanto (Bayer) then submitted a petition for a writ of certiorari with the U.S. Supreme Court which SCOTUS denied on June 27, 2022, allowing the final judgment of $87M to remain intact.
$289.2 million jury verdict in Monsanto Roundup trial
Wisner Baum co-represented Dewayne “Lee” Johnson in the first Roundup cancer lawsuit to proceed to trial. On Aug. 10, 2018, a San Francisco jury ordered Monsanto to pay $39.25 million in compensatory damages and $250 million in punitive damages to Mr. Johnson, a former groundskeeper who alleged exposure to Monsanto’s herbicides caused him to develop terminal non-Hodgkin lymphoma.
Months after the jury verdict, the judge overseeing the trial reduced the punitive damages to $39.25 million. Mr. Johnson decided to accept the remittitur, bringing the adjusted amount awarded to Mr. Johnson $78.5 million.
Monsanto (Bayer) appealed the verdict and Johnson cross appealed. On July 20, 2020, the First Circuit Court of Appeals upheld the verdict against Monsanto but reduced Mr. Johnson’s award to $20.5 million. The company chose not to take the case to the U.S. Supreme Court, ending the litigation.
In 2016, Wisner Baum attorney Timothy A. Loranger and six other attorneys in the Plaintiffs’ Management Committee were able to secure a $265 million settlement for victims of the 2015 Amtrak 188 derailment in Philadelphia, one of the largest in the U.S. for 2016.