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No Fees Unless We Win 855-948-5098
Nationwide justice Client Focused. Trial Ready. Billions Won.


  • $2.0 Billion Verdict Personal Injury

    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.

  • $289.2 Million Verdict Personal Injury

    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.

  • $265 Million Settlement Fatal Train Crash

    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.

  • $105 Million Settlement Pharmaceutical Settlement

    Wisner Baum obtained $105 million on behalf of multiple clients involved in a pharmaceutical negligence case.

  • $80 Million Verdict Personal Injury

    Wisner Baum attorneys served on the trial team in the case of Hardeman v. Monsanto Company, which resulted in an $80 million jury verdict for the plaintiff, Edwin Hardeman.

  • $63 Million Settlement Paxil Pediatric Class Action

    $63 million pediatric class action re false promotion of Paxil. Judge approves final terms of improved national pediatric paxil class action settlement – consumers get a better deal.

Nationally-Recognized Civil Trial Lawyers

Advocating for Justice Nationwide

For nearly 40 years, Wisner Baum has sought justice for our clients by holding major companies and manufacturers accountable for the harm their products and services have caused. Nationally recognized as a preeminent plaintiff’s law firm, our award-winning attorneys have developed a reputation for breaking new legal ground, holding Fortune 500 companies accountable, influencing public policy, raising public awareness, and improving product safety.

A Powerful Record of Results

Since 1985, our professional legal team has won over $4 billion in historic verdicts and settlements for our clients.

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Get In Touch Contact us or call us at (855) 948-5098 for a free consultation.

Our Areas of focus


When you have been injured, every second matters. Wisner Baum is here to do what it takes to secure the justice you deserve.

Locally & Nationally Recognized

  • Best Law Firms 2023
  • The Truck Safety Coalition
  • California Powerhouse
  • Elite Trial Lawyers
  • Listed in Best Lawyers
  • AV Top Ranked Law Firm
  • Verdicts Hall of Fame
  • Super Lawyers

Recognized as One of America’s Leading Litigation Firms

With a record of winning some of the most significant jury verdicts in recent history – such as the first and third Roundup cases against agrochemical giant Monsanto, which resulted in a combined $2.344 billion verdicts – our attorneys at Wisner Baum are often featured by the media, both here in the United States as well as abroad. Appearing thousands of times in television shows, radio programs, documentaries, newspapers, books, and magazines, our preeminent lawyers are committed to sharing our knowledge and insight with the international legal community – and with the American public we serve.

Because of this approach, we have also received many awards and accolades for our legal advocacy. Wisner Baum has often been recognized by prestigious organizations like Martindale-Hubbell®, Best Lawyers in America®, the Multi-Million Dollar Advocates Forum, Super Lawyers, the National Board of Trial Advocacy, and Trial Lawyer Magazine, among many others. We were also honored to be a Finalist in the 2020 Elite Trial Lawyers Mass Torts "Law Firm of the Year" by The National Law Journal, and to receive the National Trial Lawyers: Top 100 “Trial Team of the Year Award" in 2019.

If you or your loved ones have been injured as a result of another person’s negligence, we can provide the client-focused and trial-ready counsel that you deserve.

a strong voice in worldwide media. Wisner Baum has been recognized by national and international media as one of America’s leading firm

Client-Focused Representation


We believe our track record speaks for itself. But you don’t have to take our word for it. See what our clients have to say about working with us.

    "I Can’t Imagine a Better Law Firm"

    Multiple lawyers recommended Wisner Baum to me and I have been consistently impressed with the quality of their work.

    - Best Law Firms Survey
    "They Are About Changing the Systems..."

    Wisner Baum are not only amazing attorneys but more importantly, they are activists. They are about changing the systems which got us into trouble in the first place. They understand their role in the process of making change.

    - Kim Witczak
    "Top Legal Minds in the Country"

    The Wisner Baum firm has some of the top legal minds in the country; they are driven, determined, trustworthy, ethical and passionate.

    - From Best Lawyers® Best Law Firms
    "Diligent & Professional Representation"

    Thanks to your efforts I was able to recover from a tragic experience and turn my life around for the best.

    - W.T.
    "Our Best Interest Was Always Number One on Your List"

    A special thank you to your Spanish-speaking staff for the extra effort put into this case. The language barrier was never a problem, and we are so very thankful to them. Your name holds much respect in our family.

    - G.C. & C.C
    "We Have Never Met a More Wonderful Group of People"

    It is obvious that the people at Wisner Baum believe in what they do. And that you all really care about your clients.

    - The B. Family
    "They Worked Very Hard and Kept in Contact, Which Is Very Important to Me"

    I appreciate that you care about how I feel and that you take time to use your talents to ensure your every contact with me is warmly professional.

    - A.D.B.
    "Your Expertise in This Field Gave Me the Utmost Trust and Confidence"

    I wanted a fair settlement within an appropriate time frame, and without any public scrutiny. With your hard work and dedication, we were able to achieve those goals.

    - T.O.


  • R. Brent  Wisner Photo
    R. Brent Wisner Attorney, Managing Partner

    R. Brent Wisner is the managing partner of Wisner Baum and is based at our San Francisco Bay Area office. 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.

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  • Michael L. Baum Photo
    Michael Baum Attorney, Senior Partner

    Michael L. Baum is a senior partner of Wisner Baum (formerly Baum Hedlund Aristei & Goldman) with nearly 40 years of experience. He was the managing partner of Baum Hedlund from 1993 to 2022 and proudly turned over the reins to R. Brent Wisner in January of 2023.

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  • Bijan  Esfandiari Photo
    Bijan Esfandiari Attorney, Senior Partner

    Bijan Esfandiari is a pharmaceutical product liability litigation attorney and senior partner at Wisner Baum in Los Angeles. Since joining the firm in 2007, Bijan has worked as lead counsel on several cutting-edge pharmaceutical and medical device cases.

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  • Timothy A. Loranger Photo
    Timothy Loranger Attorney, Senior Partner, Pilot, Marine Corps Veteran

    Timothy A. Loranger is an attorney and senior partner at the national mass disaster law firm of Wisner Baum. A consumer attorney, pilot, and avid citizen advocate.

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  • Monique  Alarcon Photo
    Monique Alarcon Attorney, Senior Associate

    Monique Alarcon is an attorney in the Los Angeles office of Wisner Baum where she focuses her practice on the firm’s medical device cases, pharmaceutical drug liability and consumer fraud litigation.

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  • W. Crawford  Appleby IV Photo
    W. Crawford Appleby IV Attorney, Senior Associate

    William Crawford Appleby IV is an attorney in the Los Angeles office of Wisner Baum. He focuses on complex law and motion matters, in-depth legal research and writing, and case strategy.

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  • Pedram  Esfandiary Photo
    Pedram Esfandiary Attorney, Partner

    Pedram Esfandiary is a partner and trial attorney based in the Los Angeles office of Wisner Baum, where he concentrates his practice on toxic tort injuries, pharmaceutical drug liability, class actions, consumer fraud litigation and police misconduct lawsuits.

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  • Adam M. Foster Photo
    Adam Foster Associate, Attorney

    Adam M. Foster is an attorney in the Los Angeles office of Wisner Baum. Adam concentrates his practice on class actions and mass torts particularly those related to pharmaceuticals, consumer products, and products liability, generally.

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  • Matthew P. French Photo
    Matthew French Associate, Attorney

    Matthew P. French is an attorney at Wisner Baum’s Los Angeles office, where he focuses his practice on the firm’s commercial transportation accident cases. Led by a strong desire to help people when they need it most, Matthew’s clients appreciate his empathetic approach to how he handles his cases.

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  • Ari S. Friedman Photo
    Ari Friedman Attorney, Partner

    Ari Friedman is a partner and trial attorney at Wisner Baum where he focuses his practice on complex and multi-district litigation, product liability, and personal injury and wrongful death cases stemming from transportation accidents (including aviation accidents and truck crashes) and other catastrophic injury (including TBI).

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  • Harrison E. James Photo
    Harrison James Associate, Attorney

    Harrison E. James is an attorney in the Los Angeles office of Wisner Baum, where he focuses his practice on the firm’s pharmaceutical drug liability, class action, and consumer fraud litigation.

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  • Mayra  Maturana Photo
    Mayra Maturana Associate, Attorney

    Mayra Maturana is an attorney in the Los Angeles office of Wisner Baum where she concentrates her practice on toxic tort injuries. She is part of firm’s legal team handling the toxic baby food litigation.

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  • Clay  Robbins III Photo
    Clay Robbins III Attorney, Partner

    Clay Robbins III is an attorney and partner in the Los Angeles office of Wisner Baum. A third-generation California lawyer, Clay concentrates his practice on commercial transportation accident litigation and mass disasters.

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  • Stephanie B. Sherman Photo
    Stephanie Sherman Attorney, Partner

    Stephanie B. Sherman is a multiple award-winning trial lawyer and partner at Wisner Baum. With over 20 years of experience, she has helped thousands of clients in serious personal injury, wrongful death, product liability, chemical exposure, and dangerous pharmaceutical cases.

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  • Helen E. Tokar Photo
    Helen Tokar Attorney, Senior Associate

    Helen E. Tokar is an attorney in the Los Angeles office of Wisner Baum where she focuses her practice on the firm’s Zantac cancer litigation.

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  • Cara J. Luther Photo
    Cara Luther Attorney of Counsel

    Cara J. Luther is of counsel to Wisner Baum, focusing on the firm’s mass disaster cases and commercial transportation accident cases. She worked for 31 years as a full-time attorney at the firm until 2022.

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  • Frances M. Phares Photo
    Frances Phares Attorney of Counsel

    Frances M. Phares is of counsel to Wisner Baum, where she focuses her practice on personal injury and wrongful death litigation stemming from major transportation disasters, pharmaceutical product liability cases and toxic exposure across the nation.

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  • Mark H. Schlein Photo
    Mark Schlein Attorney of Counsel

    Mark H. Schlein transitioned to ”of counsel” status to Wisner Baum in 2022 and continues to focus on the firm’s whistleblower qui tam cases. For 11 years he worked full time as the firm’s top whistleblower attorney, handling dozens of whistleblower cases.

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  • Ronald L. M. Goldman Photo
    Ronald L. Goldman Pilot, Attorney of Counsel, Retired

    Ronald L. M. Goldman retired after 60 years in the practice of law on January 10, 2023. He held the positions of vice president and senior trial attorney at Baum Hedlund & Aristei & Goldman (now Wisner Baum) and was a pillar of Baum Hedlund for 19 years.

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  • Paul J. Hedlund Photo
    Paul Hedlund Senior Shareholder, Mechanical Engineer, Retired

    Paul J. Hedlund was an attorney for 45 years and a member of our team at Baum Hedlund Aristei & Goldman for 30 of those years. He served as one of the firm’s senior shareholders for more than 20 years, overseeing the firm’s major transportation accident cases.

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  • J. Clark  Aristei Photo
    J. Clark Aristei Senior Shareholder, Deceased

    J. Clark Aristei was an attorney for nearly 40 years and a member of our team at Wisner Baum for 26 of those years. Clark served as a senior shareholder for more than two decades and then semi-retired while also acting as Of Counsel to our firm.

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Why Choose Wisner Baum?

  • Proven Track Record

    Wisner Baum has recovered over $4 billion for our clients. We know what it takes to win big cases against big companies.

  • Award-Winning Law Firm

    Recognized as one of U.S. News – Best Lawyers® “Best Law Firms,” we have won the National Trial Lawyers’ Mass Tort Trial Team of the Year award multiple times.

  • No Fees Unless We Win
    Our team offers free consultations and operates on contingency, meaning there are no fees unless we win.
  • National Reach & Recognition
    Wisner Baum is proud to be one of the leading trial firms in America. We have what it takes to advocate for you.


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