Skip to main content

William Baer Biography, Single-Firm Conduct Hearings, May 2007

Arnold & Porter LLP

William Baer's photo William Baer
Washington, DC Office

Areas of Expertise

  • Antitrust/Competition and Trade Regulation
  • Litigation
  • Consumer Protection
  • White Collar Defense

Scope of Practice

Bill heads the firm’s antitrust group, and represents a broad range of companies in US and international cartel investigations, mergers and acquisition reviews by antitrust enforcers (FTC, DOJ and European Commission), and antitrust litigation. He divides his time between the firm’s Washington, DC and Brussels offices.

Representative Engagements

  • Micron Technology Inc., in price-fixing investigations and follow-on litigation
  • General Electric Company, including mergers & acquisitions, class action litigation, and securing acquittal on criminal price fixing charges
  • Pfizer, in its $60 billion acquisition of Pharmacia Corporation
  • Cisco Systems, in mergers & acquisitions
  • SAP, in mergers & acquisitions and other matters
  • Visa, in class action litigation

Government Experience

  • Director, Bureau of Competition, Federal Trade Commission
  • Assistant General Counsel & Director of Congressional Relations, FTC
  • Attorney Advisor to the Chairman, FTC


  • Named to The Best Lawyers in America® 2007 for Antitrust Law
  • Named to Euromoney's Expert Guides to the World's Leading Lawyers "Best of the Best 2006" for Antitrust
  • International Who's Who of Business Lawyers (2006) named William Baer the leading competition lawyer in the world
  • LawDragon500, one of the “Top Leading Litigators in America” (2006)
  • Legal Times Leading Lawyers in Antitrust 2005
  • Chambers USA: America’s Leading Lawyers for Business. Leading Antitrust/Competition Attorney (2005-2006)
  • Practical Law Company, Which Lawyer? Leading Competition Attorney in Washington, D.C. (2005-06)


  • Cartel Prosecution Around the World, Practical Law Company Competition Cross-Boarder Handbook, co-authored with Tim Frazer and Luc Gyselen (2005-06)
  • Taking Stock: Recent Trends in U.S. Merger Enforcement, Antitrust, co-authored with Deborah L. Feinstein and Randal M. Shaheen (Spring 2004)
  • Fixing the Problem: Recent Developments in US Merger Remedies, Global Competition Review "The Antitrust Review of the Americas 2004," co-authored with Deborah L. Feinstein and Matthew D. Meisner (2004)


  • Insight International Competition Law Conference, Real World Issues and Strategies for Success, “Transborder Merger Developments,” Toronto, Canada (upcoming in Spring 2006)
  • ABA Section of Antitrust Law 54th Annual Spring Meeting, “An Evaluation of the Antitrust and Consumer Protection Remedies Available to the FTC, Their Effectiveness, Recent Remedies Sought and What More the FTC Could be Doing,” Washington, DC (March 2006)
  • ABA, Section of Antitrust Law & IBA 2006 International Cartel Workshop, “Demonstration: Making the Decision – Whether to Seek Amnesty/Cooperate,” London, UK (February 2006)
  • ABA Section of Antitrust Law Fall Forum, Efficiencies, Entry and Economics: “What Role, If Any, Do They Have in Merger Analysis Today?,” Washington, DC (November 2005)
  • Transactions in the Life Sciences Sector Conference, “Current Issues in US Enforcement,” London, UK (April 2005)


  • District of Columbia
  • Wisconsin
  • Supreme Court of the United States
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. District Court for the District of Columbia

Published Articles

  • Merger Remedies Policy In The EU and USA, William Baer and Luc Gyselen - appeared in the October 2006 issue of Practical Law Company's Cross-border Competition Handbook 2006/07.
  • Cartel Prosecution Around the World, William Baer, Tim Frazer and Luc Gyselen - appeared in the 2005/2006 issue of Competition Handbook, Practical Law Company 2006.
  • International Leniency Coordination, William Baer, Tim Frazer, Luc Gyselen and Franklin Liss - appeared in the September 2006 issue of The Antitrust Review of the Americas 2007, Global Competition Review.

    Additional Publications


  • J.D., Stanford Law School, 1975
  • B.A., Lawrence University, 1972
Updated November 1, 2016