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  1. Professionals

Eric J. Knapp

Partner

San Francisco

+1 415-591-1425

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  • Overview
  • Experience
  • Credentials
  • Insights & News

An experienced class action litigator, Eric aggressively defends high-stakes, high-exposure class action matters involving alleged product defects, asserting a host of claims, including consumer protection statute violations, breach of warranty, and many more.

Eric represents and counsels some of the most reputable companies worldwide. His clients include automobile manufacturers and distributors, consumer product and appliance manufacturers, the food industry, and more. Eric is results-oriented and committed to achieving the best and most efficient resolution of his clients’ cases.

Eric gets fully involved in every aspect of his cases—formulating strategy, intensive motions practice, oral argument, taking and defending depositions, preparing expert witnesses, and handling mediations and arbitrations. Eric zealously and efficiently litigates his cases in which high exposure—both financial and reputational—is the norm. Most of the class actions Eric has defended have been dismissed at the pleading stage, on summary judgment, or defeated at class certification. He coordinates class actions all over the country for his clients, including multi-district litigations, assuring a consistent approach across all jurisdictions.

Eric also has broad experience in trade secret suits across multiple industries and counsels clients on trade secret matters and risk avoidance.

Key Matters

Some of the experience represented below may have been handled at a previous firm.

  • Defeated class certification in a sprawling nationwide class action spanning over eight years alleging certain types of wheel and tire combinations equipped on vehicles were defectively designed. The court ruled, among other things, that individualized issues of causation defeated predominance.
  • Obtained summary judgment for an automobile distributor in a class action alleging a “safety” defect and asserting an array of warranty and consumer fraud claims. The Court also denied plaintiff’s pending motion for class certification as moot.
  • Defended an automobile distributor in class action asserting breach of warranty, unfair competition, and fraudulent concealment. Class certification was denied for, among other reasons, lack of commonality and the remaining individual case was dismissed with prejudice.
  • Defended one of the nation’s largest automobile manufacturers in one of the first–and still largest–nationwide class actions ever to go to trial, asserting automotive “concealed defect” claims under the Consumers Legal Remedies Act, Unfair Competition Law, and other causes of action
  • Defended a leading U.S. manufacturer of confectionery and related grocery products in an FLSA/California Labor Code opt-in class action alleging the company’s sales representatives were improperly classified as exempt from overtime

  • Recognized in the 2024 edition of The Legal 500 US as a “Key Lawyer” in the area of Dispute Resolution: Product Liability, Mass Tort and Class Action - Defense: Toxic Tort.
  • Recognized in The Best Lawyers in America® for Consumer Law, 2023–2025 
  • Recipient, Global Competition Review (GCR) Awards, “Litigation of the Year – Cartel Defence,” 2021

  • Association of Business Trial Lawyers

Capabilities

Commercial Litigation & Disputes
Class Actions & Group Litigation
Product Liability & Mass Torts
Trade Secrets, Non Competes & Restrictive Covenants
Automotive & Mobility
Food & Beverage

Key Matters

Some of the experience represented below may have been handled at a previous firm.

  • Defeated class certification in a sprawling nationwide class action spanning over eight years alleging certain types of wheel and tire combinations equipped on vehicles were defectively designed. The court ruled, among other things, that individualized issues of causation defeated predominance.
  • Obtained summary judgment for an automobile distributor in a class action alleging a “safety” defect and asserting an array of warranty and consumer fraud claims. The Court also denied plaintiff’s pending motion for class certification as moot.
  • Defended an automobile distributor in class action asserting breach of warranty, unfair competition, and fraudulent concealment. Class certification was denied for, among other reasons, lack of commonality and the remaining individual case was dismissed with prejudice.
  • Defended one of the nation’s largest automobile manufacturers in one of the first–and still largest–nationwide class actions ever to go to trial, asserting automotive “concealed defect” claims under the Consumers Legal Remedies Act, Unfair Competition Law, and other causes of action
  • Defended a leading U.S. manufacturer of confectionery and related grocery products in an FLSA/California Labor Code opt-in class action alleging the company’s sales representatives were improperly classified as exempt from overtime

Credentials

Education

Eric received his J.D., cum laude, from the University of New Mexico in 1998, where he was a member of Order of the Coif and Associate Editor of the New Mexico Law Review. He received his B.S. in Molecular & Cellular Biology from the University of Colorado.

    Admissions
    • California

    Related Insights & News

    • Co-author, “Insurance and Class Actions: How the United States Supreme Court’s 2011 Dukes, Concepcion and Smith Decisions Will Change the Way Insurance Class Actions Are Litigated,” Mealey’s Litigation Report: Class Actions and Mealey’s Emerging Insurance Disputes, May 2012.
    • “Turning Blood into Whine: ‘Fear of AIDS’ as a Cognizable Cause of Action,” 28 N.M.L Rev. 165, 1998.
    • Speaker, “Aggressive Strategies for Defending Class Actions,” Association of Corporate Counsel 2018 Summer CLE, Santa Clara, California, June 7, 2018.
    • Speaker, “One Class Action or 50? Choice of Law Considerations as a Potential Impediment to Nationwide Class Action Settlements in the Wake of in re: Hyundai and Kia Fuel Economy Litigation,” ABA Litigation Section 5thAnnual Western Regional Program on Class Actions and Mass Torts, San Francisco, California, June 22, 2018.
    Blog
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    May 2, 2025

    Recognitions

    Winston Attorneys Recognized in The Best Lawyers in America® 2025

    August 15, 2024

    Recognitions
    Winston & Strawn Recognized in The Legal 500 U.S. 2024

    June 12, 2024

    Pro Bono In Action
    Winston and Toyota Team Up to Support Veterans in Dallas

    November 15, 2023

    Recognitions
    Winston Attorneys Recognized in The Best Lawyers in America® 2024

    August 17, 2023

    Seminar/CLE
    Winston & Strawn’s Product & Mass Torts Summit 2023

    June 14, 2023

    In the Media
    Troy Yoshino and Eric Knapp’s Arrival to Winston’s San Francisco Office Covered in Multiple Media Outlets

    February 2, 2023

    Press Release
    Winston & Strawn Adds Two Prominent Class Action Litigators in San Francisco

    February 1, 2023

    View All Insights & News

    Capabilities

    Commercial Litigation & Disputes
    Class Actions & Group Litigation
    Product Liability & Mass Torts
    Trade Secrets, Non Competes & Restrictive Covenants
    Automotive & Mobility
    Food & Beverage
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