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  1. Capabilities

Class Actions & Group Litigation

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  • Overview
  • Experience
  • Related Insights & News
  • Key Contacts

    Samantha LernerThomas B. Walsh
    View Our Full Team

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    Class Action Insider

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    Winston has developed a consistent record of success handling class action cases in state and federal courts. The practice is anchored by seasoned class action lawyers, many of whom have been recognized by Chambers USA and other ranking organizations as being top practitioners in their field. Our clients rely on us to steer them through class action matters by drawing on the firm’s significant experience in resolving complex litigation using creative and aggressive arguments, across a broad range of class, collective, coordinated, and mass actions, as well multidistrict litigation. We also have succeeded at trial in several class actions—a rare occurrence.

    Key Contacts

    Samantha LernerThomas B. Walsh
    View Our Full Team

    Brands across key sectors turn to our litigators to defend their reputations in advertising class actions. With litigators based in United States’ busiest jurisdictions—including courts in California, Florida, Illinois, New York, and Texas—we have deep experience handling some of the most high-profile and business-critical advertising cases in recent history. These disputes have involved claims of false advertising; unfair competition, unfair business practices, and unjust enrichment; and copyright, trade name, and service mark infringement, as well as alleged consumer-protection and Lanham Act violations. Our team closely monitors and assesses advertising class action trends to ensure that we can provide clients with current best practices, including how to combat newly emerging allegations of false advertising as it pertains to the presence of microplastics.

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    Our nationally recognized, global Antitrust/Competition attorneys help clients in myriad industries resolve antitrust class actions and multidistrict litigation involving claims of unfair competition, monopolization, price fixing, or other types of fraud. Clients turn to us to defend them against claims brought under federal and state antitrust and consumer-protection laws.

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    Winston’s eDiscovery team leverages years of real-world experience and knowledge for class action clients to control costs, minimize risks, and streamline document retention and management protocols.

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    We have a distinguished reputation for defending financial services and banking institutions against consumer-initiated class actions involving the Truth in Lending Act, Equal Credit Opportunity Act, Fair Debt Collection Practices Act, Fair Credit Reporting Act, Civil Rights Act, Racketeer Influenced and Corrupt Organizations Act, unfair competition laws, and other state and federal consumer-protection statutes.

    Our Labor & Employment Practice is one of the largest and most experienced practices among the United States’ multi-disciplined law firms, representing employers of all types and sizes, ranging from the Fortune 100 to privately held startups. We regularly defend against major class and collective actions, including wage-and-hour matters involving misclassification, seating, off-the-clock work, and discrimination allegations.

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    Data privacy litigation, including defending against statutory and common law claims, is a core strength of our Class Actions & Group Litigation Practice. We regularly advise and represent the world’s largest companies in complex and highly sensitive class action litigation and remediation efforts stemming from privacy laws containing private rights of action, data breaches, and ransomware incidents. Few firms can rival our in-depth, sophisticated, and integrated approach in this field. Our team combines compliance counselors, transactional lawyers, former government regulators and federal prosecutors, seasoned investigators, and experienced trial lawyers to deliver cutting-edge class action advice for privacy and data-security litigation needs across all venues. By utilizing a pragmatic business approach with technical forensic expertise, our lawyers understand the composition of our clients’ various complex data issues, as well as how to navigate the class action landscape.

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    In today’s markets, where corporate-control transactions, public offerings, activist shareholders, the use of complex derivatives and other financial instruments, bad news impacting stock performance, regulatory inquiries and investigations, and insurance coverage are often intertwined, strategic and tactical litigation decisions can have a wide-ranging impact not only on the success of a given transaction, but on companies, their boards, senior management, and those who advise them. We defend public companies, directors and officers, board committees, underwriters, auditors, and others in “stock-drop” and other class actions (and individual suits) brought by shareholders and other interested parties, alleging securities fraud and related claims.

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    State Consumer-Protection Statutes

    We have deep experience with state consumer-protection statutes in class action hubs across the United States, including:

    • UCL (California’s Unfair Competition Law), FAL (False Advertising Law), and CLRA (Consumer Legal Remedies Act);
    • FDUTPA (Florida’s Deceptive and Unfair Trade Practices Act) (Fla. Stat. 501 et seq.);
    • ICFA (Illinois’s Consumer Fraud and Deceptive Business Practices Act) (815 ILCS 505/1 et seq);
    • New York’s Gen. Business Law §§ 349-50; and
    • DTPA (Texas’s Deceptive Trade Practices Act) (Tex. Bus. & Comm. Code §§ 17.41 et seq.).

    The graphic depicts the number of statutes per state.

    Related Capabilities

    Antitrust/Competition
    Copyright-Infringement Litigation
    eDiscovery & Information Governance
    ERISA Litigation
    Financial Services Litigation
    Intellectual Property
    Litigation/Trials
    Privacy & Data Security
    Product Liability & Mass Torts
    Securities, M&A & Corporate Governance Litigation
    Automotive & Mobility
    Food & Beverage
    Healthcare
    Life Sciences
    Retail & Luxury
    Technology, Media & Telecommunications

    Recent Experience

    An Am Law LOTW Shout Out-Worthy Gold Medal Victory In $Jenner
    Won Rare Denial of Class Certification for Medtronic in Securities Fraud Litigation
    Winston Resolves Class Action Involving Automotive Navigation Software Advertising Claims
    First-of-its-Kind Slack-Fill Class Action Dismissed, Affirmed on Appeal
    Winston Obtains Dismissal of Déjà Vu Consumer Fraud Class Action

    Resources

    Class Action Insider

    Webinar

    Listen Here

    Notable

    Ranked Tier 1 Nationally in General Commercial Litigation

    Benchmark Litigation US 2024

    Ranked Tier 1 Nationally in Mass Tort Litigation/Class Actions – Defendants

    Best Law Firms 2025®

    Ranked in Litigation: General Commercial: Highly Regarded

    Chambers USA 2024
    Benchmark Litigation US 2024

    Ranked Tier 1 Nationally in General Commercial Litigation

    Best Law Firms 2025®

    Ranked Tier 1 Nationally in Mass Tort Litigation/Class Actions – Defendants

    Chambers USA 2024

    Ranked in Litigation: General Commercial: Highly Regarded

    INDUSTRY FOCUSAutomotive

    We regularly represent clients in all segments of the automotive industry, including manufacturers, OEMs, part manufacturers, rental companies, dealerships, electric vehicles, battery/lithium manufacturers, and financial service providers. We have secured numerous favorable rulings and early resolutions for clients defending against class action and multi-district litigation involving claims of false advertising and product liability in connection with alleged manufacturing defects. 

    Learn More About Our Capabilities
    INDUSTRY FOCUSAutomotive

    We regularly represent clients in all segments of the automotive industry, including manufacturers, OEMs, part manufacturers, rental companies, dealerships, electric vehicles, battery/lithium manufacturers, and financial service providers. We have secured numerous favorable rulings and early resolutions for clients defending against class action and multi-district litigation involving claims of false advertising and product liability in connection with alleged manufacturing defects. 

    Learn More About Our Capabilities
    Client SuccessWinston Negotiates Very Favorable Resolution of Consumer Class Actions Involving Multi-function Ingredient Labeling Claims for T. Marzetti
    We represented Lancaster Colony Corp. and its subsidiary T. Marzetti Co. in two nearly identical consumer class actions, both of which alleged that the use of citric acid in Marzetti’s Texas Toast products rendered the statement “no preservatives” on the front of the packaging false and/or misleading, regardless of whether the ingredient is included for preservative purposes.
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    Client SuccessWinston Negotiates Very Favorable Resolution of Consumer Class Actions Involving Multi-function Ingredient Labeling Claims for T. Marzetti
    We represented Lancaster Colony Corp. and its subsidiary T. Marzetti Co. in two nearly identical consumer class actions, both of which alleged that the use of citric acid in Marzetti’s Texas Toast products rendered the statement “no preservatives” on the front of the packaging false and/or misleading, regardless of whether the ingredient is included for preservative purposes.
    Read More

    Related Insights & News

    View All Insights & News
    Blog
    Direct Seller Defeats Class Certification in Misclassification Case

    September 23, 2025

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    June 24, 2025

    Recognitions

    Winston & Strawn Recognized in The Legal 500 U.S. 2025

    June 12, 2025

    Blog
    Toxic Tort Takedown: Court Demands Biologically Plausible Causation in Uniform Chemical Case

    May 30, 2025

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    Winston Team Led by Jeffrey Steinfeld Featured in Litigator of the Week

    May 16, 2025

    Article
    Justices' Labcorp Questions Explore Class Cert. Tensions

    May 8, 2025

    Blog
    Song–Beverly Act Reforms – Rebalancing Consumer Rights and OEM Responsibilities?

    May 2, 2025

    Blog
    The Supreme Court to Soon Resolve Divide over Certification Where Some Class Members Lack Standing

    April 3, 2025

    Blog
    A Natural Solution: Court Dumps Microplastic Suit for Lack of Scientific Evidence

    March 27, 2025

    In the Media

    Sean Wieber Discusses Growth of Privacy Class Actions Involving Biometrics and Genetics with Law.com

    March 12, 2025

    Webinar
    Privacy Problems Webinar Series

    February 18, 2025

    Speaking Engagement
    Troy Yoshino Speaks at the Bar of Quebec’s National Class Action Seminar

    November 27, 2024

    Blog
    Direct Seller Defeats Class Certification in Misclassification Case
    September 23, 2025
    Blog
    FDCA Preemption Has Teeth for Benzene Failure-to-Warn Claims
    June 24, 2025
    Recognitions

    Winston & Strawn Recognized in The Legal 500 U.S. 2025

    June 12, 2025
    Blog
    Toxic Tort Takedown: Court Demands Biologically Plausible Causation in Uniform Chemical Case
    May 30, 2025
    Recognitions
    Winston Team Led by Jeffrey Steinfeld Featured in Litigator of the Week
    May 16, 2025
    Article
    Justices' Labcorp Questions Explore Class Cert. Tensions
    May 8, 2025
    Blog
    Song–Beverly Act Reforms – Rebalancing Consumer Rights and OEM Responsibilities?
    May 2, 2025
    Blog
    The Supreme Court to Soon Resolve Divide over Certification Where Some Class Members Lack Standing
    April 3, 2025
    Blog
    A Natural Solution: Court Dumps Microplastic Suit for Lack of Scientific Evidence
    March 27, 2025
    In the Media

    Sean Wieber Discusses Growth of Privacy Class Actions Involving Biometrics and Genetics with Law.com

    March 12, 2025
    Webinar
    Privacy Problems Webinar Series
    February 18, 2025
    Speaking Engagement
    Troy Yoshino Speaks at the Bar of Quebec’s National Class Action Seminar
    November 27, 2024
    View All Insights & News
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