R. Brent Wisner

Attorney Profile

Top Rated Class Action & Mass Torts Attorney in Los Angeles, CA

Baum Hedlund Aristei & Goldman, PC
 | 10940 Wilshire Blvd., 17th Floor
Los Angeles, CA 90024
Phone: 310-207-3233
Fax: 310-820-7444
Selected To Rising Stars: 2016 - 2020
Licensed Since: 2011
Practice Areas:
  • Class Action/Mass Torts: Plaintiff (70%),
  • Personal Injury - Products: Plaintiff (20%),
  • Personal Injury - General: Plaintiff (10%)
Languages Spoken:
  • English,
  • Spanish,
  • French
    Attorney Profile

    Brent Wisner is an attorney and partner in the Los Angeles office of Baum, Hedlund, Aristei & Goldman, PC. A Los Angeles native, Brent is driven by a deep-rooted passion for using the law to help those who have been marginalized and hurt by large, and sometimes malicious, corporations. Brent has dedicated his practice to vindicating his client’s rights and holding wrongdoers accountable. He concentrates his practice on pharmaceutical class action litigation, toxic-tort injuries, whistleblower and qui tam claims, and consumer fraud litigation. Brent also oversees the firm’s Medicare Secondary Payer cases, representing Medicare providers who have lost taxpayer funds to pharmaceutical companies and other large defendants.

    Brent is one of Baum Hedlund’s lead trial attorneys and manages a highly-trained team of attorneys on all aspects of the cases in his department. He takes pride in personally working up all facets of litigation—from briefing, expert discovery, through trial and, if needed, appeal.

    Brent Wisner Roundup Cancer Lawyer

    Brent served on the trial teams for all three of the first Roundup cancer lawsuits to proceed to trial. In two of the cases, he served as co-lead trial counsel, delivering the opening and closing arguments and cross-examining many of Monsanto’s experts.

    In the summer of 2018, Brent served as co-lead trial counsel representing groundskeeper Dewayne “Lee” Johnson in the first Roundup cancer lawsuit to go to trial against Monsanto Company. The lawsuit alleged Roundup weed killer caused Mr. Johnson to develop terminal non-Hodgkin lymphoma. At trial, Brent delivered the opening and closing statements, and cross-examined most of Monsanto’s expert witnesses.

    The jury reached a unanimous verdict holding Monsanto accountable for Mr. Johnson’s cancer and ordered the company to pay $289 million ($39.2 million in compensatory damages and $250 million in punitive damages), finding that Monsanto acted with malice, oppression, or fraud and should be punished for its conduct.

    Following the groundbreaking verdict, Brent was named one of California’s Top 100 Lawyers for 2018 by the Daily Journal and the National Law Journal and the Trial Lawyer Magazine named him one of America’s 50 Most Influential Trial Lawyers. The Daily Journal listed the Johnson verdict among its top verdicts of 2018 and Courtroom View Network (CVN) listed it in its Top 10 Most Impressive Plaintiff Verdicts of 2018. Brent is also one of the lawyers recognized by The National Trial Lawyers Top 100 for the 2019 Trial Team of the Year award in the Mass Torts category for two verdicts against Monsanto: the Johnson verdict and the Hardeman verdict.

    In February of 2019, Brent joined the trial team in the second Roundup cancer trial, Hardeman v. Monsanto Company, which resulted in an $80 million verdict in favor of the plaintiff. The day after the Hardeman trial ended, Brent reprised his position as co-lead trial attorney, this time on behalf of a couple in their 70s who alleged their non-Hodgkin lymphoma was caused by years of Roundup exposure. After roughly a month of trial proceedings in Pilliod et al. v. Monsanto Company, the jury returned a historic verdict, awarding Alva and Alberta Pilliod $2.055 billion in damages ($55,206,172.80 in compensatory damages and $2 billion in punitive damages).

    Since obtaining the $2 billion verdict against Monsanto, The Daily Journal chose Brent among 30 lawyers listed as Top Plaintiffs Lawyers in California in 2019 for the Johnson and Pilliod verdicts. The Daily Journal also selected Brent for their 2019 Top 40 Under 40 Attorneys in California and the National Law Journal named him in their Winning Litigators list for 2019, describing the winners as “Masters of the Courtroom.”

    The media in the United States and around the world routinely ask Brent to provide commentary on the Monsanto Roundup litigation, including the New York Times, CNN, CBS News, NBC News, the Wall Street Journal, NPR, CBC News (Canada), The Guardian (UK) Le Monde (France), Der Spiegel (Germany), and countless other programs and publications.

    Pharmaceutical Litigation

    Law360 named Mr. Wisner a “Titan of the Plaintiffs Bar” for, in part, his role as co-lead counsel in a complex trial that resulted in the first multi-million-dollar jury verdict against a brand-name drug-maker, GSK, holding it liable for injuries caused by a generic version of the drug Paxil. The case has been described as groundbreaking and likely to shape the landscape of pharmaceutical litigation for years to come. Also, because of this cutting-edge verdict, The National Law Journal recognized Brent and the firm as 2018 Elite Trial Lawyers and the first place winner in the category of Pharmaceutical Litigation.

    Early Career

    Prior to working at Baum Hedlund, Brent served as a Law Clerk for the Honorable Helen Gillmor in the U.S. District Court for the District of Hawaii for two years. While clerking, he worked on several jury trials, both criminal and civil, and was responsible for aiding the Court in resolving complex pretrial and post-trial motions. In addition, he worked on several cases in other jurisdictions, including the District of Arizona and the Eastern District of California. While clerking, Brent also gained valuable appellate court experience when Judge Gillmor sat on the United States Court of Appeals for the Ninth Circuit in Pasadena, California.

    Brent received his law degree (J.D.) and a Master of Public Policy (M.P.P.) from Georgetown University prior to his clerkship. While at Georgetown on a scholarship, he was recognized for his commitment to public interest law and received a pro bono service award for completing over 750 hours of volunteer legal work.

    During law school, Brent was heavily involved with the Georgetown Law Trial Advocacy Program, where he was one of the most successful mock trial advocates in the history of the school. Some accolades Brent received at various national competitions included “Top Advocate” at the National Ethics Trial Convention — a competition he also won — and “Most Exceptional Advocate” at the National White-Collar Crime Invitational. Because of Brent’s success with mock trial, he volunteered as a coach and instructor of the team and served as the Managing Director of the Trial Advocacy Program during his third year of law school. In addition to his pro bono work and participation in mock trial, Brent also served as the Executive Editor of the Georgetown Public Policy Review—a peer-reviewed publication focusing on important issues in law and public policy.

    Brent also volunteered as a legal intern, during law school, at the Institute on Religion and Public Policy, where he drafted testimony, affidavits, and declarations for legal proceedings that related to human rights. He even wrote a resolution on the imprisonment of Sigma Huda, an outspoken Bangladeshi critic of human trafficking, which passed in the U.S. House of Representatives. During his first summer at law school, Brent worked for the U.S. Attorney’s Office in Los Angeles, within the Civil Fraud Division. It was there that Brent first discovered an interest and passion in whistleblower law. In his second summer of law school, he worked as a Summer Associate at Paul Hastings in the Los Angeles office.

    Prior to starting law and graduate school, Brent participated in the prestigious Coro Fellowship. As a Coro Fellow, Brent worked on a variety of important projects with labor unions, local and national government, Fortune 100 companies, and non-profit organizations. It was a formative experience for Brent where he developed a unique insight into how, through the law, one could genuinely improve society.

    Brent is an outspoken and passionate UCLA Bruin. He received his undergraduate degree, with honors, in Philosophy and Political Science from the University of California, Los Angeles in 2005. At UCLA, Brent was heavily involved with the UCLA Sailing team, serving as a Captain for two years. In addition, Brent was a Captain on the UCLA Mock Trial Team, which during his last two years won back-to-back National Championships. Brent was also personally recognized as an “All-American Attorney” by the American Mock Trial Association.


    Baum Hedlund has taken on the Zantac cancer litigation after the U.S. Food and Drug Administration (FDA) announced that it is investigating Zantac cancer risks after testing of certain Zantac (ranitidine hydrochloride) tablets found the commonly-used heartburn medication contains a cancer-causing chemical up to 3,000 times greater than the FDA’s daily intake limit. The carcinogenic chemical present in Zantac is known as N-nitrosodimethylamine (“NDMA”). Though the FDA has yet to issue an official Zantac recall, CVS and Walgreens have pulled Zantac and Zantac OTC generics from their shelves and Apotex has voluntarily recalled its ranitidine products from Rite-Aid and Walgreens.  


    Practice Areas
    • 70%Class Action/Mass Torts: Plaintiff
    • 20%Personal Injury - Products: Plaintiff
    • 10%Personal Injury - General: Plaintiff
    Focus Areas

    Class Actions, Toxic Torts, Pharmaceutical, Products Liability, Personal Injury - Plaintiff, Wrongful Death


    top-imageSelected to Rising Stars for 5 years

    Rising Stars: 2016 - 2020

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    About Brent Wisner

    Admitted: 2011, California

    Professional Webpage: https://www.baumhedlundlaw.com/attorneys/r-brent-wisner/


    • Mr. Wisner was chosen one of America’s 50 Most Influential Trial Lawyers for his success over the past year in obtaining a $289M landmark verdict against Monsanto for causing a groundskeeper's non-Hodgkin lymphoma. Mr. Wisner was selected based on his professional achievements, trial results and ability to affect change in the legal community., The Round Table: America's Most Influential Trial Lawyers, The National Law Journal and Trial Lawyer Magazine, 2019
    • The National Trial Lawyers Top 100 recognized the law firms of Baum, Hedlund, Aristei & Goldman, the Miller Firm and Audet & Partners with the 2019 Trial Team of the Year award (in the Mass Torts category) for their work in the groundbreaking case of Dewayne “Lee” Johnson v. Monsanto Company., Trial Team of the Year, The National Trial Lawyers Top 100, 2019
    • The National Law Journal has recognized the law firm of Baum, Hedlund, Aristei & Goldman in its 2018 Elite Trial Lawyers list for pharmaceutical litigation based on the firm’s work in a high-profile case against drug manufacturer GlaxoSmithKline., Elite Trial Lawyers, The National Law Journal, 2018
    • The Daily Journal stated when it chose Mr. Wisner for The Top 100 Lawyers in California: Wisner led the charge in handing agrochemical giant Monsanto Company a monumental legal defeat earlier this summer. Wisner served as co-lead trial counsel for Dewayne “Lee” Johnson, a former Bay Area groundskeeper who filed suit against Monsanto in 2016, alleging exposure to the company’s glyphosate-based herbicides caused him to develop non-Hodgkin lymphoma. Johnson’s case was the first of thousands of similar lawsuits to proceed to trial., Top 100 Lawyers in California, Daily Journal, 2018
    • Brent Wisner was one of ten attorneys Law360 profiled for earning significant legal victories in 2017. According to Law360, the attorneys on the Titans of the Plaintiffs Bar list not only excel in the courtroom in large-scale litigation, but also take on leadership roles at their firms. These attorneys “strategically shaped outcomes, acted as champions to their clients and nabbed massive settlements. And they perform with passion,” Law360 wrote. Law360 chose Mr. Wisner for the landmark $3M generic Paxil verdict against GSK, holding a brand manufacturer accountable for a death caused by the generic version of its drug., Titan of the Plaintiffs Bar, Law360, 2018
    • Top List: Up-And-Coming-100, Southern California Rising Stars, 2018
    • The National Trial Lawyers Top 40 Under 40
    • Selected to Law360 Titan of the Plaintiffs Bar, 2018
    • Listed, The Bar Register of Preeminent Lawyers™
    • Selected to Southern California Super Lawyers® – Rising Stars - 2016-2018
    • “Top Advocate” at the National Ethics Trial Competition
    • Winner of the National Ethics Trial Competition
    • Semi‐finalist at the National Trial Advocacy Competition
    • UCLA Mock Trial Team, Team Captain, National Champions in 2003 and 2004
    • Pro bono service award
    • “Most Exceptional Advocate” at the National White Collar Crime Invitational
    • Winner of the American Association of Justice Mock Trial Tournament
    • Semi‐finalist at the National Civil Trial Competition
    • UCLA Mock Trial Team, Team Captain, Named “All American Attorney” by the American Mock Trial Association
    • Georgetown Public Policy Review, Executive Editor
    • “Top Gun” at the Top Gun Mock Trial Tournament
    • Mock Trial: Georgetown Law Barristers’ Council, Trial Advocacy, Managing Director
    • Finalist (2nd of 200) at the National Student Trial Advocacy Competition
    • Academic Scholarship, Honors in Philosophy and Political Science, UCLA
    • UCLA Sailing Team, Team Captain

    Bar/Professional Activity:

    • Member: State Bar of California;  Consumer Attorneys of California;  Consumer Attorneys of Los Angeles;  American Association for Justice: Leader’s Forum; American Association for Justice: Products Liability; American Association for Justice: Section on Toxic, Environmental, and Pharmaceutical Torts; American Association for Justice: Talcum Powder/Ovarian Cancer Litigation Group; American Association for Justice: Herbicides and Pesticides Litigation Group; American Association for Justice: Class Action Litigation Group; American Association for Justice: Preemption Law Litigation Group;  Federal Bar Association: Federal Litigation Section - Younger Lawyer Division
    • Court Admissions:California, 2011;  U.S. District Court, Northern District of California, 2012;  U.S. Dist. Court, Central District of California, 2013;  U.S. Dist. Court, Eastern District of California, 2013;  U.S. Dist. Court, Southern District of California, 2013;  U.S. Court of Appeals, First Circuit, 2013;  U.S. Supreme Court, 2014;  U.S. Court of Appeals, Seventh Circuit, 2014;  U.S. Court of Appeals, Ninth Circuit, 2014;  U.S. District Court, Southern District of Indiana, 2015;  U.S. District Court, Western District of Wisconsin, 2016;  U.S. District Court, Northern District of Illinois, 2017

    Pro bono/Community Service:

    • Coro Fellowship

    Scholarly Lectures/Writings:

    • Topic: Cymbalta Withdrawal Litigation In re: Cymbalta (Duloxetine) Products Liability Litigation; Organization: American Association for Justice; Event: AAJ Education’s Plaintiff-Only Hot Topics and Trends in Litigation Seminar; Location: Charleston, South Carolina; Date: December 3, 2014
    • “Politics of Enforcement: How the Department of Justice Enforces the Civil False Claims Act,” 17 GEO. PUB. POL’Y REV. 43-60, 2012, Author
    • “Judicial Activism? The Roberts Court in the Coming Term,” GEO. PUB. POL’Y REV., Dec. 31, 2009, Author
    • “Asylum Denied: Seeking Asylum in the Age of Terrorism,” 12 GEO. PUB. POL’Y REV. 21, 2007, Author
    • “Expressing the Sense of the House of Representatives Regarding the Violation of the Human Rights of United Nations Special Rapporteur on Trafficking in Persons, Sigma Huda, and Others, by the Caretaker Government of Bangladesh,” H. R. 761, 110th Cong., 2007, Author
    • Topic: Monsanto Roundup Litigation; Organization: Mass Torts Made Perfect; Event: MTMP Spectacular Fall Conference; Location: Las Vegas, Nevada; Date: October 19, 2017  
    • Topic: Roundup Class Action; Organization: HarrisMartin; EventHarrisMartin’s Roundup® Litigation Conference AgendaLocation: Chicago, Illinois; Date: June 29, 2017  


    • Dewayne Johnson v. Monsanto Company (case no. CGC-16-550128) Unanimous $289.2 million jury verdict against Monsanto Company This was a groundbreaking $289.2 million jury verdict in San Francisco Superior Court against Monsanto for causing Dewayne "Lee" Johnson's non-Hodgkin lymphoma due to exposure to a Monsanto glyphosate-based herbicide called Roundup. The jury ordered Monsanto to pay $39.2 million in compensatory damages and $250 million in punitive damages for failing to warn consumers that exposure to Roundup weed killer causes cancer. This verdict is on appeal., 2018. Mr. Johnson is represented by The Miller Firm, LLC, Baum Hedlund Aristei & Goldman, PC and Audet & Partners LLP., 2018
    • Dolin v. SmithKline Beecham Corp. et al., case number 1:12-cv-06403, in the U.S. District Court for the Northern District of Illinois. On April 20, 2017 a federal jury awarded $3 million to Wendy Dolin, resolving allegations in the trial of Dolin v. Smithkline Beecham Corp. (D/B/A GlaxoSmithKline-GSK) over the (generic Paxil) paroxetine-induced wrongful death of Wendy Dolin’s late husband, Stewart Dolin, who was a partner at the Chicago law firm Reed Smith when he took his own life in 2010. Dolin is represented by Baum Hedlund Aristei & Goldman and Rapoport Law Offices. This verdict is on appeal., 2017

    Other Outstanding Achievements:

    • Government Service: Law Clerk, Hon. Helen Gillmor, United States District Court, Honolulu, Hawaii, 2010 – 2012;  Judicial Extern, Hon. Marian Blank Horn, United States Court of Federal Claims, Washington, D.C., 2009;  Summer Extern, United States Attorney’s Office, Civil Fraud Division, Los Angeles, California, 2008;  Brian Ohleyer Legislative Intern, Office of United States Senator Barbara Boxer, Washington, D.C., 2004 – 2005


    Educational Background:

    • University of California, Los Angeles, Bachelor of Arts in Philosophy and Political Science
    • Georgetown McCourt School of Public Policy, Washington, D.C., Master of Public Policy

    Industry Groups

    • Catastrophic Injury
    • Complex And Multi-District Litigation
    • Mass Disaster Litigation
    • Medical Device
    • Personal Injury
    • Pharmaceutical Drug Product Liability
    • Product Liability
    • Qui Tam Claims
    • Toxic Torts
    • Whistleblower Protection
    • Wrongful Death Law
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    Office Location for R. Brent Wisner

    10940 Wilshire Blvd.
    17th Floor
    Los Angeles, CA 90024

    Phone: 310-207-3233

    Fax: 310-820-7444

    R. Brent Wisner:

    Last Updated: 10/27/2020

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