R. Brent Wisner: Attorney | Partner | Vice President


  • Georgetown University Law Center, Washington, D.C. (Juris Doctor)
  • Georgetown McCourt School of Public Policy, Washington, D.C. (Master of Public Policy)
  • University of California, Los Angeles (Bachelor of Arts in Philosophy and Political Science
  • Georgetown Public Policy Review, Executive Editor
  • Mock Trial: Georgetown Law Barristers’ Council, Trial Advocacy, Managing Director

wisner awards

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.

Featured in the New York Times – Attorneys Brent Wisner and Michael Baum in Brussels with clients John Barton and Teri McCall before important EU glyphosate vote, bringing a face to the Roundup lawsuits and to focus on the Monsanto Papers.

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.

R. Brent Wisner in the News

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

Video Center: R. Brent Wisner

  • Liaison Counsel to Federal MDL-2741 In Re: Roundup Products Liability Litigation for Roundup JCCP 4953 Alameda 2018 – present
  • Trial Co-Lead Counsel, Pilliod et al. v. Monsanto.Company (3rd Roundup cancer lawsuit trial), Oakland, California, 2019
  • Trial Counsel, Hardeman vs. Monsanto Company (2nd Roundup cancer lawsuit trial), San Francisco, California, 2019
  • Trial Co-Lead Counsel, Dewayne “Lee” Johnson vs Monsanto Company (1st Roundup cancer lawsuit trial), San Francisco, California, 2018
  • Plaintiffs’ Steering Committee, Administrator and Co-Lead Counsel for the Roundup Products Cases, known as the Roundup Judicial Council Coordinated Proceedings (JCCP 4953), California Superior Court for the County of Alameda, California, 2018 – present
  • Trial Co-Lead Counsel, Wendy B. Dolin vs GlaxoSmithKline LLC (generic Paxil suicide lawsuit), Chicago, Illinois, 2017
  • Plaintiffs’ Steering Committee / Liaison Counsel for the Cymbalta Drug Cases JCCP 4825 Los Angeles 2015 – present
  • Trial Co-Lead Counsel, Hagen-Brown vs Eli Lilly (Cymbalta withdrawal lawsuit), Richmond, Virginia, 2015
  • State Bar of California
  • Consumer Attorneys of California
  • Consumer Attorneys of Los Angeles
  • San Francisco Trial Lawyers Association
  • American Association for Justice: Leader’s Forum; Products Liability; Section on Toxic, Environmental, and Pharmaceutical Torts; Talcum Powder/Ovarian Cancer Litigation Group; Herbicides and Pesticides Litigation Group; Class Action Litigation Group; Preemption Law Litigation Group
  • Federal Bar Association; Federal Litigation Section; Younger Lawyer Division
  • 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
  • Briefing before Parliament of Canada’s Green Party of Canada about the $289M Monsanto Roundup cancer verdict and the Monsanto Papers at Parliament Hill, Ottawa, January 30, 2019
  • Topic: The Science: NDMA, Ranitidine, and the Risk of Cancer
    Topic: Moderator – Class Actions for Consumers & TPPs (Third-Party Payors)
    Organization: Harris Martin
    Event: Harris Martin’s Zantac Litigation Conference
    Location: Miami Beach, Florida
    Date: January 8, 2020
  • Topic: Key New Mass Torts: Zantac, Paragard, and HIV Drugs
    : Anatomy of a Roundup Trial and the Upcoming Docket
    Organization: Harris Martin
    Event: MDL Conference
    Location: Austin, Texas
    Date: December 4, 2019
  • Topic: Zantac Attack: Over the Counter Carcinogen
    Organization: Mass Torts Made Perfect
    Event: Seminar
    Location: The Bellagio, Las Vegas, Nevada
    Date: October 23, 2019
  • Topic: $289M Monsanto Roundup Verdict – Life After the Daubert Ruling and Johnson Trial
    Speech Title: The Johnson Trial and JCCP ( Judicial Council Coordination Proceedings)
    Organization: Harris Martin Publishing
    Event: Half-Day Roundup CLE (Continuing Legal Education)
    Location: Loews Santa Monica Beach Hotel, Santa Monica, California
    Date: October 24, 2018
  • Topic: Recent $289M Monsanto Verdict
    Organization: Harvard University
    Event: Notable torts case discussion with Professor Jon Hanson’s Tort Law Class
    Location: Harvard Law School, Cambridge, Massachusetts
    Date: September 28, 2018
  • Topic: Monsanto Roundup Litigation
    Organization: Mass Torts Made Perfect
    Event: MTMP Spectacular Fall Conference
    Location: Las Vegas, Nevada
    Date: October 19, 2017
  • 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
  • Judicial Activism? The Roberts Court in the Coming Term, GEO. PUB. POL’Y REV., Dec. 31, 2009
  • Asylum Denied: Seeking Asylum in the Age of Terrorism, 12 GEO. PUB. POL’Y REV. 21, 2007
  • 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


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