Bill Katz

• Represented several health care providers in litigation involving claims for alleged violations of Sections 1 and 2 of the Sherman Act, state antitrust violations, breach of contract, and tortious interference.°
• Represented several health care providers in connection with a lawsuit involving alleged monopolization, price fixing, and anti-competitive mergers.°
• Represented a hospital and physician group in a lawsuit involving claims of monopolization and attempted monopolization.°
• Represented an international petroleum company in a lawsuit involving alleged Sherman Act violations and claims for breach of contract, misappropriation of trade secrets, fraud, and business disparagement.°
• Represented several opt-out plaintiffs in public and non-public price-fixing matters.°
• Represented a hospital system and staffing agency in a lawsuit involving claims under the Sherman Act and 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 and 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 and 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 and advised clients regarding mergers, joint ventures, clinically integrated networks, pricing issues, and other antitrust matters.°

• Represented an international mining company’s affiliate in an American Arbitration Association (AAA) arbitration and related confirmation proceeding.°
• Represented the general partner of a partnership in a lawsuit involving claims for breach of fiduciary duty and breach of contract.°
• Represented an international energy company and its affiliate in an International Centre for Dispute Resolution (ICDR) arbitration involving claims for breach of contract, fraud and 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 and its affiliates in an ICDR arbitration involving claims for breach of contract and 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 and declaratory relief.°
• Represented an international energy company in an ICDR arbitration involving claims for breach of contract and declaratory relief.°
• Represented two international energy companies in an ICDR arbitration involving claims for declaratory relief regarding the interpretation of an oil and gas contract.°
• Represented an international energy company’s affiliates in connection with the confirmation of an ICDR arbitration award.°
• Represented a luxury retailer and its board of an ICDR arbitration award.°
• Represented an international energy company’s affiliates in an ICDR arbitration involving claims for breach of contract and other relief.°
• Represented an independent energy company in a AAA arbitration involving the breach of a purchase and sale agreement for certain oil and gas assets.°
• Represented a large electronics manufacturing services company in a AAA arbitration involving claims for breach of contract and unjust enrichment.°

• Represented a health care provider in a lawsuit involving claims under the False Claims Act (FCA).°
• Represented an international mining company’s affiliate in a lawsuit involving claims for breach of contract and deceptive trade practices.°
• Represented a trustee in connection with potential litigation involving a trust and trust administration matters.°
• Represented a publicly traded real estate investment trust (REIT) in state tax litigation.°
• Represented an individual and related entity in litigation involving claims for breach of fiduciary duty and breach of contract arising from a partnership dispute.°
• Represented an international energy company and its affiliates in a lawsuit involving claims for fraud, breach of fiduciary duty, breach of contract and statutory violations.°
• Represented a hospital system in a lawsuit involving alleged contractual breaches and 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, and conspiracy.°
• Represented an oilfield services company in a lawsuit involving claims for breach of contract, fraud, and 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 and other relief.°
• Represented an international energy company’s affiliate in a lawsuit involving claims for indemnification and 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 and promissory estoppel.°
• Represented a major transportation company in a class action lawsuit involving claims for negligence, breach of contract, and 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, and conspiracy.°
• Represented a publicly traded REIT in a lawsuit involving claims for trespass.°
• Represented several former officers and directors of a fiber-optic manufacturer in a jury trial involving the defense of a claim under the Computer Fraud and Abuse Act (CFAA) and the prosecution of a defamation counterclaim.°
• Represented the former president of an international franchisor in a jury trial involving claims for fraud and breach of contract.°
• Represented clients challenging the issuance and scope of several IRS summonses.°

• Represented a limited partner and officer in a lawsuit involving claims for breach of fiduciary duty and breach of contract.°
• Represented the general partner of a partnership in a lawsuit involving claims for breach of fiduciary duty and breach of contract.°
• Represented a shareholder in a lawsuit to enjoin a proposed merger in the financial services industry.°
• Represented a technology company and several of its officers and directors in a class action lawsuit involving alleged violations of federal securities laws.°
• Represented a corporation and two shareholders in a jury trial involving the prosecution of claims against a publicly traded medical device manufacturer and its officers and directors for securities fraud, breach of fiduciary duty, and breach of contract.°
• Represented a technology company and its officers and directors in a lawsuit involving claims for breach of fiduciary duty, fraud, misrepresentation, tortious interference and breach of contract.°
• Represented an energy company and its board of directors in a class action lawsuit involving claims for breach of fiduciary duty in connection with a merger and acquisition.°
• Represented a luxury retailer and its board of directors in a class action lawsuit involving claims for breach of fiduciary duty in connection with a merger and 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 handled by Mr. Katz prior to his joining Greenberg Traurig, LLP.

• Listed, Global Competition Review, GCR 100, 2021, 2024-2025
• Listed, The Best Lawyers in America
  • Antitrust Law, 2009-2025
  • Commercial Litigation, 2009-2025
  • Litigation – Antitrust, 2009-2025
  • 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, 2023-2025
• Listed, Chambers USA Guide, 2009-2024
• Listed, D Magazine, Best Lawyers in Dallas, 2021-2025
• Listed, Super Lawyers magazine, Texas Super Lawyers, 2008-2024

• 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