About Mr. Bill Katz

Bill Katz is the Co-Chair of the Antitrust Litigation & Competition Regulation practice. In addition to counseling clients on a variety of antitrust issues, he is a first-chair trial lawyer who represents clients before federal and state trial and appellate courts, arbitration panels, and administrative agencies, including the Federal Trade Commission (FTC) and the U.S. Department of Justice (DOJ). Besides helping clients address complex disputes, Bill also has experience conducting internal investigations, representing audit committees, and designing and implementing compliance and training programs.

Bill is a frequent speaker and author on antitrust, health care, class action, and other complex litigation issues. He has been recognized in the areas of antitrust law and commercial litigation in several legal directories, including Global Competition Review, Lawdragon 500, The Best Lawyers in America and Chambers USA.

Concentrations

•Antitrust
•Commercial litigation
•Arbitration
•Health care
•Energy

Recognition & Leadership

Awards & Accolades

•Listed, Global Competition Review, GCR 100, 2021, 2024-2025
•Listed, The Best Lawyers in America
•Antitrust Law, 2009-2026
•Commercial Litigation, 2009-2026
•Litigation - Antitrust, 2009-2026
•Litigation - Securities, 2009-2025
•Dallas Litigation - Antitrust Lawyer of the Year, 2015, 2021
•Listed, Lawdragon 500
•Leading Antitrust & Global Competition Lawyers, 2025
•Leading Litigators in America, 2023-2026
•Listed, Chambers USA Guide, Texas - Antitrust, 2009-2025
•Listed, D Magazine, Best Lawyers in Dallas, 2021-2025
•Listed, Super Lawyers magazine, Texas Super Lawyers, 2008-2025

 

Awards

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Services

Areas of Law

  • Other 6
    • Antitrust Litigation & Competition Regulation
    • Arbitration & Mediation
    • Health Care & FDA Practice
    • Energy & Natural Resources
    • Retail
    • International Arbitration

Practice Details

  • Firm Information
    Position
    Shareholder
    Firm Name
    Greenberg Traurig, LLP
  • Representative Cases & Transactions
    Cases
    Experience: Antitrust: Representing a distributor
    retailer in multiple class action lawsuits involving an alleged conspiracy to fix prices.
    Representing an international petroleum company in a lawsuit involving alleged Sherman Act violations
    claims for breach of contract, misappropriation of trade secrets, fraud,
    business disparagement.
    Representing a health care provider in connection with a lawsuit involving alleged monopolization, price fixing,
    anti-competitive mergers.
    Represented several health care providers in litigation involving claims for alleged violations of Sections 1
    2 of the Sherman Act, state antitrust violations, breach of contract,
    tortious interference.
    Represented a hospital
    physician group in a lawsuit involving claims of monopolization
    attempted monopolization.
    Represented several opt-out plaintiffs in public
    non-public price-fixing matters.
    Represented a hospital system
    staffing agency in a lawsuit involving claims under the Sherman Act
    the False Claims Act.
    Represented a manufacturer in multiple class action lawsuits involving an alleged conspiracy to fix prices.
    Represented a manufacturer in a lawsuit involving claims of monopolization
    attempted monopolization.
    Represented an insurance company in a lawsuit involving price-fixing allegations.
    Represented a manufacturer in an adjudicatory proceeding before the FTC involving price-fixing allegations.
    Represented a group of physicians in an adjudicatory proceeding before the FTC involving price-fixing allegations.
    Represented an international offshore drilling company in a class action lawsuit alleging a conspiracy among drilling companies to fix the wages
    benefits paid to their offshore workers.
    Represented several charitable organizations in a nationwide class action lawsuit alleging a conspiracy to fix the rates of return for charitable gift annuities.
    Counseled
    advised clients regarding mergers, joint ventures, clinically integrated networks, pricing issues,
    other antitrust matters.
    Arbitration: Representing an international mining company's affiliate in connection with the enforcement of an arbitration agreement.
    Represented an international mining company's affiliate in an American Arbitration Association (AAA) arbitration
    related confirmation proceeding.
    Represented an international energy company
    its affiliate in an International Centre for Dispute Resolution (ICDR) arbitration involving claims for breach of contract, fraud
    statutory violations.
    Represented a borrower in an AAA arbitration involving claims for breach of a loan agreement.
    Represented a bank acting as the independent administrator of an estate in an ad hoc arbitration involving the enforceability of a premarital agreement.
    Represented an international energy company
    its affiliates in an ICDR arbitration involving claims for breach of contract
    fraud.
    Represented an international energy company's affiliate in an AAA arbitration involving claims for breach of contract.
    Represented a health care provider in an AAA arbitration involving claims for breach of contract related to a stock purchase agreement.
    Represented a large transportation company in a proceeding to vacate an arbitration award.
    Represented an international energy company in an International Chamber of Commerce (ICC) arbitration involving claims for breach of contract
    declaratory relief.
    Represented an international energy company in an ICDR arbitration involving claims for breach of contract
    declaratory relief.
    Represented two international energy companies in an ICDR arbitration involving claims for declaratory relief regarding the interpretation of an oil
    gas contract.
    Represented an international energy company's affiliates in connection with the confirmation of an ICDR arbitration award.
    Represented an international energy company's affiliates in an ICDR arbitration involving claims for breach of contract
    other relief.
    Represented an independent energy company in a AAA arbitration involving the breach of a purchase
    sale agreement for certain oil
    gas assets.
    Represented a large electronics manufacturing services company in a AAA arbitration involving claims for breach of contract
    unjust enrichment.
    Complex Business Issues: Representing an international mining company's affiliates in a lawsuit involving claims for breach of contract
    declaratory relief.
    Representing an international mining company's affiliate in a lawsuit involving claims for indemnification.
    Representing a health care provider in a lawsuit involving claims under the False Claims Act (FCA).
    Representing an international mining company's affiliate in a lawsuit involving claims for breach of contract
    deceptive trade practices.
    Representing a trustee in connection with potential litigation involving a trust
    trust administration matters.
    Represented a publicly traded real estate investment trust (REIT) in state tax litigation.
    Represented an individual
    related entity in litigation involving claims for breach of fiduciary duty
    breach of contract arising from a partnership dispute.
    Represented an international energy company
    its affiliates in a lawsuit involving claims for fraud, breach of fiduciary duty, breach of contract
    statutory violations.
    Represented a hospital system in a lawsuit involving alleged contractual breaches
    violations of the Texas Deceptive Trade Practices Act (DTPA).
    Represented several hospitals in class action lawsuits involving alleged violations of the DTPA.
    Represented an international energy company in federal income tax litigation.
    Represented a publicly traded REIT in a lawsuit involving claims for breach of contract, tortious interference,
    conspiracy.
    Represented an oilfield services company in a lawsuit involving claims for breach of contract, fraud,
    conspiracy.
    Represented a business trust in a class action lawsuit.
    Represented a medical device manufacturer in a lawsuit involving claims under the FCA.
    Represented a hospital in a class action lawsuit alleging statutory billing violations.
    Represented an international energy company's affiliate in a class action lawsuit involving the alleged failure to pay royalties owed on flared natural gas.
    Represented a hospital in a lawsuit involving claims under the FCA.
    Represented an international energy company's affiliate in a lawsuit involving claims under the FCA.
    Represented an international energy company's affiliates in a lawsuit involving claims for breach of contract
    other relief.
    Represented an international energy company's affiliate in a lawsuit involving claims for indemnification
    other equitable relief.
    Represented an international energy company in a lawsuit involving claims for breach of contract.
    Represented a master limited partnership in a lawsuit involving claims for breach of contract.
    Represented an international energy company in a lawsuit involving claims for breach of fiduciary duty, fraud
    promissory estoppel.
    Represented a major transportation company in a class action lawsuit involving claims for negligence, breach of contract,
    breach of fiduciary duty arising from the tax treatment of a special dividend.
    Represented a publicly traded REIT in a lawsuit involving claims for tortious interference, misappropriation of trade secrets,
    conspiracy.
    Represented a publicly traded REIT in a lawsuit involving claims for trespass.
    Represented several former officers
    directors of a fiber-optic manufacturer in a jury trial involving the defense of a claim under the Computer Fraud
    Abuse Act (CFAA)
    the prosecution of a defamation counterclaim.
    Represented the former president of an international franchisor in a jury trial involving claims for fraud
    breach of contract.
    Represented clients challenging the issuance
    scope of several IRS summonses.
    Securities
    Corporate Governance: Represented the general partner of a partnership in a lawsuit involving claims for breach of fiduciary duty
    breach of contract.
    Represented a limited partner
    officer in a lawsuit involving claims for breach of fiduciary duty
    breach of contract.
    Represented the general partner of a partnership in a lawsuit involving claims for breach of fiduciary duty
    breach of contract.
    Represented a shareholder in a lawsuit to enjoin a proposed merger in the financial services industry.
    Represented a technology company
    several of its officers
    directors in a class action lawsuit involving alleged violations of federal securities laws.
    Represented a corporation
    two shareholders in a jury trial involving the prosecution of claims against a publicly traded medical device manufacturer
    its officers
    directors for securities fraud, breach of fiduciary duty,
    breach of contract.
    Represented a technology company
    its officers
    directors in a lawsuit involving claims for breach of fiduciary duty, fraud, misrepresentation, tortious interference
    breach of contract.
    Represented an energy company
    its board of directors in a class action lawsuit involving claims for breach of fiduciary duty in connection with a merger
    acquisition.
    Represented a luxury retailer
    its board of directors in a class action lawsuit involving claims for breach of fiduciary duty in connection with a merger
    acquisition.
    Represented the audit committee of a large technology outsourcing company in connection with internal investigation of issues raised by the Sarbanes-Oxley Act of 2002.
    The above representations were h
    led by Mr. Katz prior to his joining Greenberg Traurig, LLP.
  • Additional Links

Experience

  • Bar Admission & Memberships
    Admissions
    California
    District of Columbia
    New York
    Texas
    U.S. Court of Appeals for the First Circuit
    U.S. Court of Appeals for the Second Circuit
    U.S. Court of Appeals for the Fifth Circuit
    U.S. Court of Appeals for the Eighth Circuit
    Supreme Court of the United States
    U.S. District Court for the Central District of California
    U.S. District Court for the Eastern District of California
    U.S. District Court for the Northern District of California
    U.S. District Court for the Southern District of California
    U.S. District Court for the District of Colorado
    U.S. District Court for the District of Columbia
    U.S. District Court for the Western District of Michigan
    U.S. District Court for the Eastern District of New York
    U.S. District Court for the Northern District of New York
    U.S. District Court for the Southern District of New York
    U.S. District Court for the Northern District of Oklahoma
    U.S. District Court for the Eastern District of Tennessee
    U.S. District Court for the Middle District of Tennessee
    U.S. District Court for the Eastern District of Texas
    U.S. District Court for the Northern District of Texas
    U.S. District Court for the Southern District of Texas
    U.S. District Court for the Western District of Texas
    U.S. District Court for the Western District of Wisconsin
    Memberships

    Professional & Community Involvement

    •American Bar Association, Antitrust Section
    •Co-Chair, Trial Practice Committee, 2022-Present
    •Vice Chair, Trial Practice Committee, 2014-2016, 2019-2022
    •Vice Chair, Transportation and Energy Committee, 2011-2014
    •Co-Chair, Insurance and Financial services Committee, 2009-2011
    •Chair, Insurance Industry Committee, 2007-2009
    •Vice Chair, 2003-2007
    •State Bar of Texas, Antitrust and Business Litigation Section
    •Chair, 2008-2009
    •Chair-Elect, 2007-2008
    •Secretary-Treasurer, 2006-2007
    •Council Member, 2001-2009
    •Dallas Bar Association, Antitrust and Trade Regulation Section
    •Chair, 2008
    •Vice Chair, 2007
    •Member, Law360 International Arbitration Editorial Advisory Board, 2016-2017
    •Contributing Editor, Texas Business Litigation Journal, 2000-2016
    •Member, State Bar of California, Antitrust and Unfair Competition Law Section
    Litigation Section
    •Member, District of Columbia Bar, Antitrust Section
    •Member, New York State Bar Association
    •Member, American Health Lawyers Association
    •Interviewer, Georgetown University Alumni Admissions Program
    •fellow, American Bar Foundation
    •fellow, Texas Bar Foundation
    •fellow, Dallas Bar Foundation

    Bar Fellowship
    Texas Bar Foundation; Dallas Bar Foundation; American Bar Foundation.
  • Education & Certifications
    Law School
    Georgetown University Law Center
    J.D.
    Other Education
    Georgetown University
    B.S.
    magna cum laude

Activity

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Attorneys FAQs

  • Is this attorney admitted to the bar in more than one state?
    Yes, Mr. Bill Katz is admitted to practice in California, District of Columbia, New York and Texas.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Mr. Bill Katz is admitted to practice before the United States Court of Appeals for the Eighth Circuit, United States Court of Appeals for the Fifth Circuit, United States Court of Appeals for the First Circuit, United States Court of Appeals for the Second Circuit, United States District Court for the Central District of California, United States District Court for the District of Colorado, United States District Court for the District of Columbia, United States District Court for the Eastern District of California, United States District Court for the Eastern District of New York, United States District Court for the Eastern District of Tennessee, United States District Court for the Eastern District of Texas, United States District Court for the Middle District of Tennessee, United States District Court for the Northern District of California, United States District Court for the Northern District of New York, United States District Court for the Northern District of Texas, United States District Court for the Southern District of California, United States District Court for the Southern District of New York, United States District Court for the Southern District of Texas, United States District Court for the Western District of Michigan, United States District Court for the Western District of Texas, United States District Court for the Western District of Wisconsin and United States Supreme Court.
  • Is this attorney Martindale-Hubbell Peer Review rated?
    Yes, Mr. Bill Katz has a 4.9 Peer Rating from Martindale-Hubbell.
  • How many attorneys are in this law firm?
    Greenberg Traurig, LLP has 2750 attorneys at this location.
  • What law school did this attorney attend?
    Mr. Bill Katz attended Georgetown University Law Center.