Photo of William A. 'Bill' Isaacson

William A. 'Bill' Isaacson

Founding Partner, Dunn Isaacson Rhee

202-240-2902wisaacson@dirllp.com

401 9th Street, NW
Washington, DC 20004

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Bill Isaacson is widely considered one of the preeminent trial lawyers of his generation. Clients have expressed “deep trust and confidence” in Isaacson, commending his “superb intellect” finding he “brings a unique comfort in the courtroom.”

Isaacson has been described as a trial lawyer who “simplifies difficult facts and technologies and makes them understandable to a jury,” and has said that his noteworthy cross-examinations have "changed the court's thinking overnight.” His effectiveness in the courtroom has also caught the attention of the Wall Street Journal, which observed that, following a cross-examination from Isaacson, "there was a distinct feeling in the air that change was coming."

Lawdragon Honors

Honor Year Practice
The 2027 Lawdragon 500 Leading Litigators in America 2027 Complex Litigation, inc. Antitrust, Copyright, International Arbitration
The 2026 Lawdragon 500 Leading Global Litigators 2026 Global Litigation, Antitrust
The 2026 Lawdragon 500 Leading Plaintiff Financial Lawyers 2026 Antitrust
The 2026 Lawdragon 500 Leading Global Antitrust & Competition Lawyers 2026 Complex Litigation, Antitrust, Sports
The 2026 Lawdragon 500 Leading Lawyers in America 2026 Litigation, esp. Antitrust
The 2026 Lawdragon 500 Leading Litigators in America 2026 Complex Litigation, inc. Antitrust, Copyright, International Arbitration
The 2025 Lawdragon 500 Leading Plaintiff Financial Lawyers 2025 Antitrust
The 2025 Lawdragon 500 Leading Global Entertainment, Sports & Media Lawyers 2025 Litigation- Sports, Antitrust, Digital technology
The 2025 Lawdragon 500 Leading Global Antitrust & Competition Lawyers 2025 Complex Litigation, Antitrust, Sports
The 2025 Lawdragon 500 Leading Litigators in America 2025 Complex Litigation, inc. Antitrust, Copyright, International Arbitration
The 2025 Lawdragon 500 Leading Lawyers in America 2025 Litigation, esp. Antitrust
The 2024 Lawdragon 500 Leading Litigators in America 2024 Complex Litigation, inc. Antitrust, Copyright, International Arbitration
The 2024 Lawdragon 500 Leading Plaintiff Financial Lawyers 2024
The 2024 Lawdragon 500 Leading Lawyers in America 2024 Litigation, esp. Antitrust
The 2023 Lawdragon 500 Leading Plaintiff Financial Lawyers 2023 Antitrust Litigation
The 2023 Lawdragon 500 Leading Lawyers in America 2023 Litigation, esp. Antitrust
Lawdragon 500 Leading Litigators in America 2022 Complex Litigation, inc. Antitrust, Copyright, International Arbitration
The 2022 Lawdragon 500 Leading Plaintiff Financial Lawyers 2022 Antitrust Litigation
The 2022 Lawdragon 500 Leading Lawyers in America 2022 Litigation, esp. Antitrust
The 2021 Lawdragon 500 Leading Plaintiff Financial Lawyers 2021 Antitrust Litigation
The 2021 Lawdragon 500 Leading Lawyers in America 2021 Litigation, esp. Antitrust
The 2020 Lawdragon 500 Leading Plaintiff Financial Lawyers 2020 Antitrust Litigation
The 2020 Lawdragon 500 Leading Lawyers in America 2020
Lawdragon 500 Leading Plaintiff Financial Lawyers 2019 Antitrust Litigation
The 2019 Lawdragon 500 Leading Lawyers in America 2019
Lawdragon 500: The Legends (2018) 2018
The 2018 Lawdragon 500 Leading Lawyers in America 2018
The 2017 Lawdragon 500 Leading Lawyers in America 2017
The 2016 Lawdragon 500 Leading Lawyers in America 2016
The 2014-15 Lawdragon 500 Leading Lawyers 2014-2015
The 2013 Lawdragon 500 Leading Lawyers 2013
The 2012 Lawdragon 500 Leading Lawyers 2012

Isaacson has tried cases in a number of areas, including contract, commercial torts, copyright, international arbitration, and antitrust. In antitrust, Isaacson has successfully represented both plaintiffs and defendants in major antitrust litigations and has tried more federal antitrust class actions in this century than any other lawyer, all of which were major victories.

Lawdragon writes that it is “nearly impossible to find a more reliable antitrust litigator than Isaacson, who has successfully handled several of the most high-profile cases in the past two decades.”

Isaacson is also a sought-after speaker at the nation’s top legal conferences, including NYU Law School’s conference on Antitrust and 21st Century Bigness; the American Antitrust Institute; the Sedona Conference; and MLEX Advisory Board; and has conducted mock trials for the Spring and Fall ABA Antitrust Conferences and the ABA Economics Institute for Judges at George Mason University. 

Isaacson is a member and former Chair of the Board for Legal Counsel for the Elderly. In 2015, the group recognized him with its individual Award for Sustained Excellence and Outstanding Commitment. He is also the trustee of the Garry Shandling Charitable Trust (www.garryshandling.com). His pro bono work has been featured in articles in the Washington Post.

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