Wisner Baum

Name

Wisner Baum

Legal name

Wisner Baum LLP

Website

https://wisnerbaum.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

51–100 employees

Ownership category

akta.pro rank

Product category

Plaintiff Mass Tort and Personal Injury Legal Services

NAICS

Offices of Lawyers (541110), Legal Services (5411)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Litigation & Dispute Resolution (BPAHAAAB)

akta.pro secondary industries

Personal Injury & Insurance Defense (BPAHAAAM), Litigation Support & Expert Witness Services (BPAHALAG)

Keywords

• Mass tort litigation
• Personal injury law
• Product liability cases
• Toxic tort lawsuits
• Plaintiff-side representation

Headquarters

HQ city

Los Angeles

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others, Infrastructure

Revenue model

1. Legal Services - Contingency Fees: The firm operates on a contingency fee basis, collecting fees only when cases are won or settled. This aligns the firm's interests with clients and is typical for personal injury and mass tort litigation.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Wisner Baum provides plaintiff-side legal representation in mass tort, personal injury, and consumer protection litigation matters, including pharmaceutical drug lawsuits, toxic tort cases, defective medical device claims, California wildfire litigation, aviation wrongful death actions, and consumer class actions. The firm operates on a contingency fee basis — clients pay no upfront fees and the firm is compensated only through successful verdicts or settlements. Its portfolio spans more than a dozen distinct practice areas, anchored by the Roundup/glyphosate litigation track record.

Product overview

Wisner Baum is a plaintiff-side mass tort and personal injury law firm offering legal representation services across diverse practice areas. The firm operates as a unified legal services practice rather than a technology product company, providing specialized litigation services in pharmaceutical drug liability, toxic torts, defective medical devices, consumer class actions, and wildfire victims' rights. Their portfolio spans over a dozen distinct practice areas including Roundup/glyphosate litigation (with a notable $2.055 billion verdict), GLP-1 drug lawsuits (Ozempic, Wegovy, Mounjaro), Zantac/ranitidine claims, toxic baby food class actions, atrazine and paraquat herbicide litigation, and California wildfire litigation. The firm has recovered over $4 billion for clients and represents over 20,000 families.

Differentiator

Problem solved

Functional benefit

Products and services

• Roundup/Glyphosate Litigation Legal representation for individuals alleging non-Hodgkin lymphoma or other cancers from exposure to Roundup herbicide containing glyphosate. Represented by Wisner Baum across trial and settlement phases; practice includes individual cases and the Roundup class action.
• GLP-1 Drug Litigation (Ozempic, Wegovy, Mounjaro, Rybelsus) Legal representation for individuals filing claims alleging adverse effects from GLP-1 receptor agonist medications used for diabetes and obesity, including Ozempic, Wegovy, Mounjaro, and Rybelsus.
• Toxic Baby Food Litigation Legal representation for families alleging autism and ADHD diagnoses in children caused by exposure to toxic heavy metals in commercial baby food products.
• Zantac (Ranitidine) Cancer Litigation Legal representation for individuals alleging cancer caused by NDMA contamination in Zantac (ranitidine) heartburn and ulcer medications.
• Suboxone Dental Injury Litigation Legal representation for individuals alleging dental injuries caused by Suboxone, a medication used in opioid use disorder treatment.
• Atrazine Herbicide Litigation Legal representation for individuals alleging non-Hodgkin lymphoma and other health effects from exposure to the atrazine herbicide.
• Paraquat Parkinson's Disease Litigation Legal representation for individuals alleging Parkinson's disease caused by occupational or environmental exposure to the paraquat herbicide.
• Chlorpyrifos Pesticide Litigation Legal representation for individuals alleging Parkinson's disease caused by exposure to the chlorpyrifos pesticide.
• Antipsychotic Drug Litigation (Zyprexa, Risperdal, Invega) Legal representation for individuals alleging breast cancer risk or other adverse effects from antipsychotic medications, including Zyprexa, Risperdal, and Invega.
• California Wildfire Litigation Legal representation for individuals and families who suffered property loss, injury, or wrongful death in California wildfires, with negligence claims against utility companies including Southern California Edison and PG&E.
• Port Catheter Injury Litigation Legal representation for individuals injured by defective port catheters used in chemotherapy and long-term IV therapy.
• Spinal Cord Stimulator Injury Litigation Legal representation for individuals injured by defective spinal cord stimulator devices used in chronic pain management.
• Dexcom Continuous Glucose Monitor Class Action Class action representation for individuals harmed by Dexcom G6 and G7 continuous glucose monitoring devices manufactured with allegedly unapproved materials that caused speaker malfunctions and device failures.
• Consumer Class Action Services Consumer class action representation for groups of individuals harmed by defective products and unlawful corporate practices, including the Actos RICO class action and benzoyl peroxide acne products litigation.
• Aviation Wrongful Death and Injury Representation Plaintiff-side legal representation for wrongful death and catastrophic injury claims arising from commercial and regional aviation accidents, including the Bering Air Flight 445 litigation.
• Civil Rights / Excessive Force Litigation Plaintiff-side civil rights litigation seeking accountability for excessive force and other constitutional violations, including individual verdicts against municipal defendants.

Quantifiable outcome

• Over $4 billion in verdicts and settlements recovered for clients
• +2 more outcomes

Named customers3 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• JOTO PR Disruptors™supportingGTM or Marketing Partner · 19 November 2025JOTO PR Disruptors™ partnered with Wisner Baum LLP to promote its anti-PR strategy and support the firm's legal campaigns for corporate accountability. The partnership focuses on transparency and justice initiatives.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Morgan & Morgan: Largest U.S. plaintiff personal injury firm with national advertising scale. Competes for mass tort plaintiffs and wildfire/civil rights matters, though it operates a much broader volume-driven model than Wisner Baum's boutique trial approach.
• Robins Kaplan: Established national firm with significant plaintiff mass tort and class action practice. Overlaps with Wisner Baum in pharmaceutical and consumer class actions, though it also operates a robust defense-side practice.

Direct peers

• Weitz & Luxenberg: New York plaintiff mass tort firm with deep pharmaceutical, medical device, and toxic exposure practices. Direct peer in drug (Zantac, GLP-1) and environmental litigation.
• Baron & Budd: Texas-based plaintiff mass tort firm focused on environmental, pharmaceutical, and product liability litigation. Directly comparable in toxic tort (Roundup, atrazine, paraquat) and consumer class action work.
• Keller Postman: National plaintiff class action and mass tort firm with product liability and consumer protection focus. Comparable in class action MDL leadership and consumer product cases like baby food and CGM devices.
• Seeger Weiss: National plaintiff mass tort and class action firm with strong pharmaceutical and medical device practices. Closely comparable in GLP-1, medical device, and consumer class action work.
• Simmons Hanly Conroy: Illinois-based plaintiff mass tort firm with national reach in asbestos, pharmaceutical, and Roundup litigation. Competes for bellwether trial slots in the same MDLs Wisner Baum litigates.
• Levin Papantonio Rafferty: Florida-based plaintiff mass tort firm with pharmaceutical, medical device, and consumer class action practices. Direct peer in mass tort trial work.
• Lieff Cabraser Heimann & Bernstein: San Francisco-based plaintiff mass tort and class action firm with parallel product liability, pharmaceutical, and consumer cases. Direct competitor for lead counsel roles in MDLs like Roundup and consumer class actions.
• Napoli Shkolnik: Plaintiff mass tort firm with parallel pharmaceutical, opioid, and environmental toxic exposure cases. Comparable mid-sized boutique plaintiff practice.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/WisnerBaum
• Facebookfacebook.com/BaumHedlund

Revenue estimate

Valuation estimate

Number of profiles

Profiles16 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Wisner Baum