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Wisner Baum attorneys Michael L. Baum, Bijan Esfandiari, Timothy A. Loranger, and R. Brent Wisner have been honored in the Lawdragon 500. Each attorney received recognition for their outstanding legal work on complex personal injury cases in Los Angeles, California, and nationwide.


Lawdragon is one of the country’s most trusted and popular legal media companies. It reports on important legal news stories and legislative updates. Lawdragon also reviews and appraises attorneys that it believes to be at the top of their practices, who are then curated in its annual 500 Leading Plaintiff Consumer Lawyers list. Peer nominations are used to begin this process, which helps keep it open to any practicing attorney.

In one of its announcements, Lawdragon said this about the attorneys who made the list: “From the opioid epidemic to toxic substances and defective products, truck accidents to wildfires and sexual abuse, these are the lawyers who stand on the front line in individual lawsuits and class actions seeking justice. They relish their role of underdog, taking on the toughest cases and typically only getting paid if they win. Talk about heroes.” 


R. Brent Wisner is Wisner Baum’s managing partner and one of the firm’s lead trial attorneys. Attorney Wisner gained widespread acclaim for his work in the Monsanto Roundup litigation, where he served as co-lead trial counsel in two of the first three cases to go before juries. These trials culminated in jury verdicts worth over $2.3 billion and helped pave the way for settlements with Bayer worth roughly $11 billion. Mr. Wisner is currently Co-Lead Plaintiffs’ Liaison Counsel for the Ranitidine Product Cases, also known as the Ranitidine (Zantac) Judicial Council Coordinated Proceedings (JCCP 5150) in California. Lawdragon 500 has recognized Attorney Wisner for four consecutive years (2019-2023).

Michael L. Baum

Michael Lin Baum is Wisner Baum’s president and senior partner who oversees all of the firm’s class actions and mass tort litigation, including the Zantac cancer litigation and the baby food litigation. He and senior shareholder Bijan Esfandiari are currently spearheading the Gardasil HPV vaccine litigation against Merck. Previous mass torts include pharmaceutical drugs, medical devices, and consumer products like Monsanto’s Roundup. Lawdragon 500 has recognized Attorney Baum for four consecutive years (2019-2023). Read Michael Baum’s Lawdragon Lawyer Limelight article.

Bijan Esfandiari is a pharmaceutical product liability litigation attorney and senior partner at Wisner Baum. He has worked as lead counsel on many of the firm’s cutting-edge major pharmaceutical and medical device cases. His skilled legal advocacy has helped thousands of clients secure full and fair compensation. Attorney Esfandiari’s successes have included many precedent-setting rulings that have helped shape the law for the benefit of those harmed by dangerous drugs and medical devices. He is currently leading the firm’s Gardasil cases. Lawdragon 500 has recognized Attorney Esfandiari since 2022.

Timothy A. Loranger is a senior partner at Wisner Baum. He concentrates his practice on product liability, aviation, and commercial ground transportation accidents. As the head of Wisner Baum’s transportation department, Loranger oversees a team of lawyers handling complex commercial truck, bus, and aviation accident cases. His wealth of experience coupled with a multidisciplinary background in the fields of science and mechanics are vital in identifying and proving causation in accident investigations. Also a veteran of the US Marine Corps, Mr. Loranger is proud to represent military service members and their families in personal injury and wrongful death lawsuits against negligent contractors.  Read Tim Loranger’s Lawdragon Lawyer Limelight article. Lawdragon 500 first recognized Attorney Loranger in 2023.


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  • $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.



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.

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