R. Brent Wisner: Attorney | Senior 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 senior 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.

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.

One of the Leading Zantac Lawyers in the Country

In 2019, Brent and his colleagues filed lawsuits against the manufacturers of Zantac (ranitidine) alleging the popular heartburn medication contains a cancer-causing chemical (NDMA) at levels over 3,000 times greater than the FDA’s legal limit. The lawsuits were among the first of what will likely be many thousands. “Based on recent scientific findings, the levels of NDMA in Zantac are staggering,” says Wisner. “Considering how many people took Zantac in the U.S. since 1983, we are staring into the face of a public health crisis, and these defendants—in particular GSK and Pfizer—are to blame.”

The judge overseeing the multi-district litigation (MDL No. 2924) (where all of the cases filed in federal courts are consolidated) appointed Brent to the Practices and Procedures Team to help establish the protocols and methodology for litigating tens of thousands of cases in the years to come. Brent also serves as Co-Chair of the Zantac Litigation Group for AAJ – American Association for Justice.

Brent’s Appearances Discussing the Zantac Litigation

  • Lawyer: ‘Real Explosion’ of Lawsuits Predicted Over Zantac – Law.com
  • CA Man Says Zantac Medication Caused His Cancer – Spectrum TV News
  • Zantac Census Plus, Mass Torts Made Perfect Connect webinar, Apr. 2020
  • Zantac: A Major Health Crisis, Mass Torts Made Perfect Connect webinar, Mar. 2020
  • Zantac Litigation, Master of Mass Tort Conference, Feb. 2020
  • Status of the Zantac Litigation, American Association of Justice webinar, Jan. 2020
  • Zantac: Diving into the Science – Harris Martin MDL Conf., Jan. 2020
  • The Science: NDMA, Ranitidine, and the Risk of Cancer – Harris Martin’s Zantac Litigation Conference, Jan. 2020
  • Key New Mass Torts: Zantac – Harris Martin Multi-district Litigation Conf., Dec. 2019
  • Zantac Attack: Over the Counter Carcinogen – Mass Torts Made Perfect Conf., Oct. 2019

Brent Wisner Roundup Cancer Lawyer

Brent Wisner served on all the trial teams for the first three Monsanto Roundup trials. He served as co-lead trial counsel in two of the first three cases, delivering the opening and closing arguments, and cross-examining many of Monsanto’s corporate witnesses.

Brent Wisner in Monsanto Roundup Litigation: 

The juries in the first three trials found that exposure to Monsanto’s Roundup weed killer caused the plaintiffs to develop non-Hodgkin lymphoma, awarding more than $2.424 billion in total damages.

Brent also holds a judge-appointed leadership role as administrator and co-lead counsel for the Roundup Judicial Council Coordination Proceedings (JCCP), which consists of hundreds of Roundup cases consolidated before the California Superior Court for the County of Alameda (state court). He also serves as Liaison Counsel to the Federal MDL-2741 (multi-district litigation) In Re: Roundup Products Liability Litigation for Roundup JCCP 4953 Alameda County.

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.

Following the groundbreaking verdicts in the Monsanto trials, Brent has been honored with numerous awards and accolades in recognition of his skill in the courtroom:

  • 2019 Civil Plaintiff Trial Lawyer of the Year, National Trial Lawyers and ALM
  • Winning Litigators Titans of Industry, 2019, National Law Journal
  • Top 40 Under 40 Attorneys in California 2019, Daily Journal
  • Daily Journal Top Verdicts 2019 (Pilliod et al., v. Monsanto listed #1)
  • 2020 Elite Trial Lawyers Mass Tort Law Firm of the Year Finalist, The National Law Journal and The Trial Lawyer Magazine
  • 2019 Trial Lawyer of the Year Finalist, Consumer Attorneys Association of Los Angeles
  • 2019 Elite Trial Lawyers Mass Tort Trial Team of the Year, The National Law Journal and The Trial Lawyer Magazine
  • America’s 50 Most Influential Trial Lawyers 2019 – Trial Lawyer Magazine and The National Law Journal
  • Top Plaintiffs Lawyers in California 2019, Daily Journal
  • Trial Team of the Year 2019, The National Trial Lawyers Top 100
  • The Round Table: America’s Most Influential Trial Lawyers 2018, National Trial Lawyers
  • Top 100 Lawyers in California 2018, Daily Journal
  • Daily Journal Top Verdicts, 2018
  • Lawdragon 500 Leading Plaintiff Consumer Lawyer
  • Top 10 Verdicts, Personal Injury, 2018

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

  • Member, Practices and Procedures Team, In re Zantac/Ranitidine NDMA Litigation, MDL No. 2924 (U.S. District Court, Southern District of Florida), 2020 –
  • Co-Chair Zantac Litigation Group, AAJ – American Association for Justice, 2020 –
  • 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
  • Co-Chair Zantac Litigation Group, American Association for Justice, 2020 –
  • 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: Zantac Census Plus
    Organization: Mass Torts Made Perfect Connect
    Event: Webinar
    Date: April 8, 2020
  • Topic: Zantac: A Major Health Crisis
    Organization: Mass Torts Made Perfect Connect
    Event: Webinar
    Date: March 26, 2020
  • Topic: Zantac litigation
    Topic: Roundup litigation
    Organization: Masters of Mass Tort
    Event: Conference
    Location: Ritz Carlton, Cancun
    Date: February 27, 2020
  • Topic: Status of the Zantac Litigation
    Organization: AAJ – American Association for Justice
    Event: Rapid Response Webinar
    Date: January 31, 2020
  • Topic: Zantac: Diving into the Science (NDMA, Ranitidine, and the Risk of Cancer)
    Organization: Harris Martin
    Event: Harris Martin’s MDL Conference: Zantac, Sex Trafficking and Emerging Mass Tort Litigation Agenda
    Location: Tampa, Florida
    Date: January 29, 2020
  • 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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