R. Brent Wisner

Attorney Profile

Top Rated Class Action & Mass Torts Attorney in Larkspur, CA

Baum, Hedlund, Aristei & Goldman, P.C.
80 E Sir Francis Drake Blvd., Suite 3J
Larkspur, CA 94939
Phone: 310-207-3233
Selected to Rising Stars: 2016 - 2021
Licensed Since: 2011
Practice Areas: Class Action/Mass Torts: Plaintiff (70%), Personal Injury - Products: Plaintiff (20%), Personal Injury - General: Plaintiff (10%)
Languages Spoken: English, French, Spanish
Attorney Profile

Attorney R. Brent Wisner is a senior shareholder and the vice president of Baum Hedlund Aristei & Goldman, a nationwide law firm based in Los Angeles, California. He focuses his practice on holding negligent and sometimes malicious corporations accountable through pharmaceutical product liability, toxic torts and consumer fraud and class action litigation. One of the firm’s leading trial lawyers, Brent oversees the mass tort litigation department. He is actively involved in all litigation stages, from briefing to trial and through the appeal process when necessary.

He is passionate about vindicating the rights of those harmed by corporate wrongdoing. No matter how large the corporation or how much global influence it has, Attorney Wisner never backs down in the face of injustice. He has litigated cases against such companies as Bayer, Eli Lilly, Forest Labs, GlaxoSmithKline, Monsanto and Takeda.

A Key Force in the Monsanto Roundup Cancer Trials
Attorney Wisner’s work on the Monsanto Roundup litigation earned him national acclaim as the youngest United States attorney in history to ever win a multi-billion-dollar jury verdict. In 2019, Brent and his team won a historic $2.055 billion verdict against Bayer (formerly Monsanto) for a California couple that alleged repeated exposure to Roundup weed killer caused them to develop non-Hodgkin’s lymphoma.

A year prior, Brent and his team won the first Roundup case to proceed to trial, a landmark $289 million jury verdict for a California man who developed non-Hodgkin’s lymphoma after years of spraying Roundup as a groundskeeper.

Many major legal organizations have recognized Brent and showered him with numerous awards honoring his achievements in the Roundup cancer litigation. Some of his top awards include, Law360 MVP of the Year 2020, Daily Journal Top 100 Lawyers in California 2020, ALM and the National Trial Lawyers’ 2019 Civil Plaintiff Trial Lawyer of the Year, the National Law Journal’s Winning Litigators Titans of Industry 2019 and Trial Lawyer Magazine America’s 50 Most Influential Trial Lawyers 2019.

A Leading Plaintiff’s Attorney in Pharmaceutical Litigation

Attorney Wisner also served as co-lead counsel in the first multi-million-dollar jury verdict won against a brand name drug manufacturer, GlaxoSmithKline (GSK), over the health risks posed by the generic version of GSK’s antidepressant drug, Paxil (paroxetine).

When the firm learned of a widow whose husband died by suicide while taking the generic version of Paxil, Attorney Wisner and his colleagues at the firm took on GSK for inadequately warning doctors about how the drug could increase the risk of suicidal behavior in adults of all ages. In 2018 the National Law Journal honored Attorney Wisner and his firm as Elite Trial Lawyers for their work in the generic Paxil suicide case and Law360 awarded him Titan of the Plaintiffs Bar.

His work in pharmaceutical litigation does not stop at harmful antidepressant medications. Attorney Wisner is one of the nation’s leading Zantac (ranitidine) attorneys. He represents many thousands of people throughout the country who allege Zantac (ranitidine) contains a cancer-causing ingredient at levels exponentially higher than the U.S. Food and Drug Administration’s (FDA’s) legal limit.

The judge presiding over the Zantac multidistrict litigation (MDL) appointed Brent to the Practices and Procedures Team to establish protocols for handling the thousands of cases to come. Attorney Wisner also serves as the American Association for Justice (AAJ) Zantac Litigation Group Co-Chair.

Awards & Accolades

Often chosen as one of a select group of remarkable trial lawyers with victories in high-stakes matters, Attorney Wisner is grateful for the many awards and accolades he has won in the early stage of his career. Not yet in his 40’s, Brent is viewed by many in the legal community as one of the country’s leading mass tort lawyers. The National Law Journal and VerdictSearch inducted him into the Verdicts Hall of Fame in 2020.

Just a portion of his recognitions from the past few years include the following:

• America’s 50 Most Influential Trial Lawyers 2019, Trial Lawyer Magazine and The National Law Journal
• MVP of the Year 2020, Product Liability, Law360
• Product Liability Practice Group of the Year 2020, Law360
• The Best Lawyers in America© 2021
• The National Trial Lawyers: Top 40 under 40
• Top 40 Under 40 Attorneys in California, 2019, Daily Journal
• Civil Plaintiffs Trial Lawyer of the Year 2019, National Trial Lawyers and ALM
• Top 100 Lawyers in California 2020, Daily Journal
• Top Plaintiffs Lawyers in California, 2019, Daily Journal
• Verdicts Hall of Fame Inductee, The National Law Journal and VerdictSearch
• Elite Trial Lawyers Mass Tort Trial Team of the Year 2019, The National Law Journal and Trial Lawyer Magazine
• Southern California Super Lawyers® Rising Stars, 2016–2020
• Winning Litigators 2019, The National Law Journal
• Titan of the Plaintiffs Bar 2018, Law360
• Avvo.com Superb Score 10 out of 10
• Lawdragon 500 Leading Plaintiff Consumer Lawyer

Early Years

Attorney Wisner earned his bachelor’s degree in philosophy and political science from the University of California, Los Angeles, his master’s degree in public policy from Georgetown McCourt School of Public Policy, Washington, D.C., and his law degree from Georgetown University Law Center, Washington, D.C.

A proud UCLA Bruin, Brent served as captain of UCLA’s Mock Trial Team, which won back-to-back national championships under his leadership.

At Georgetown, Attorney Wisner was a participant in the Coro Fellowship, which proved to be a formative experience. As a fellow, he was able to work on numerous projects aimed at improving communities with the help of labor unions, Fortune 100 companies, non-profits, and local and federal governments. When he returned home for summer breaks, he worked at the U.S. Attorney’s Office in its civil fraud division and as a summer associate at Paul Hastings.

While in law school, Brent interned at the Institute on Religion and Public Policy, where he drafted testimony, affidavits, and declarations for human rights cases. He penned a resolution on the imprisonment of outspoken human trafficking critic Sigma Huda, which passed in the House of Representatives. Brent was also intensely involved in the Georgetown Law Trial Advocacy Program. He earned the title of being one of the institution’s most successful mock trial advocates and ended up serving as its managing director.

Before joining Baum Hedlund Aristei & Goldman, Attorney Wisner clerked for the Honorable Helen Gillmor in the U.S. District Court for the District of Hawaii, where he worked on several criminal and civil jury trials and gained invaluable appellate court experience when the judge sat on the U.S. Court of Appeals for the Ninth Circuit.

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


6 Years Rising Stars
  • Rising Stars: 2016 - 2021

Articles about R. Brent Wisner appearing in Super Lawyers

About R. Brent Wisner

Admitted: 2011, California

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

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  

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


  • 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


  • 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

  • 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; U.S. District Court, District of Colorado, 2016; U.S. Court of Appeals, Eleventh Circuit, 2020; District of Columbia, 2021; The District of Columbia Court of Appeals, 2021

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

80 E Sir Francis Drake Blvd.
Suite 3J
Larkspur, CA 94939

Phone: 310-207-3233

Last Updated: 6/15/2021

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