David B. Rosenbaum
Awarded Practice Areas
Biography
Valued by clients for his ability to analyze and respond to complicated commercial litigation, David has built a strong practice representing Fortune 50 companies in state and federal courts. He focuses on a wide range of complex litigation, including securities and intellectual property litigation, class action claims, as well as other large commercial disputes. He has provided regular counsel to large public companies facing lawsuits in Arizona who value his ability to advocate both in oral and written arguments.
David’s practice includes representation of both local and national companies and their officers and directors, naturally adapting his experience across industries, including aerospace, telecommunications, and healthcare. He graduated with honors from Georgetown University Law School and completed mediation training at the Strauss Institute for Dispute Resolution at Pepperdine University School of Law. He is a past President of the Federal Bar Association and Lawyer Representative to the Ninth Circuit Judicial Conference. He currently serves on the Arizona State Bar Board of Governors and the Board of Directors at the Arizona Foundation for Legal Services and Education. He has been recognized in America’s Leading Lawyers for Business by Chambers USA and has been named multiple times as Lawyer of the Year for Phoenix in Best Lawyers® and as a Top 100 Lawyer in Arizona by AZ Business Magazine.
Overview
- Georgetown University, J.D., graduated 1983
- University of Pennsylvania, B.A., graduated 1979
- Arizona, 1984
- District of Columbia, 1985
- U.S. Supreme Court
- U.S. Tax Court
- U.S. Court of Appeals, Ninth Circuit
- U.S. District Court, District of Arizona
- Arizona Supreme Court
- U.S. Court of Appeals, District of Columbia Circuit
- United States District Court
- Arizona, 1984
- District of Columbia, 1985
- Georgetown University, J.D., graduated 1983
- University of Pennsylvania, B.A., graduated 1979
- U.S. Supreme Court
- U.S. Tax Court
- U.S. Court of Appeals, Ninth Circuit
- U.S. District Court, District of Arizona
- Arizona Supreme Court
- U.S. Court of Appeals, District of Columbia Circuit
- United States District Court
Client Testimonials
Awards & Focus

- Litigation - Intellectual Property, Phoenix (2024)
- Litigation - Securities, Phoenix (2024)
- Litigation - Securities, Phoenix (2021)
- Litigation - Intellectual Property, Phoenix (2020)
- Bet-the-Company Litigation, Phoenix (2016)
- Litigation - Securities, Phoenix (2014)
- Bet-the-Company Litigation, Phoenix (2011)
- Bet-the-Company Litigation
- Commercial Litigation
- Litigation - Construction
- Litigation - Intellectual Property
- Litigation - Mergers and Acquisitions
- Litigation - Securities
- Civil Litigation
- Class Actions
- Commercial Disputes
- Complex Litigation
- COVID-19
- Defendants
- Intellectual Property
- SEC Enforcement
- Stockholders' Suits
Thomson Reuters, Stand-Out Lawyer, 2025
Chambers USA, America’s Leading Lawyers for Business, Litigation: General Commercial, 2005-2025
Best Lawyers®, Bet-the-Company Litigation; Commercial Litigation; Construction Litigation; Intellectual Property Litigation; Mergers & Acquisitions Litigation; Securities Litigation, 2005-2026
AZ Business Magazine, “Top 100 Lawyers in Arizona”, 2020, 2021, 2024
Lawdragon’s “100 Lawyers You Need to Know in Securities Litigation”, 2008
Benchmark Litigation Star, 2024-2025
Benchmark Litigation, Arizona “Local Litigation Star”, 2010-2022
Southwest Super Lawyers, “Top 50 Arizona Attorneys”, 2010, 2012, 2014-2024
Southwest Super Lawyers in Business Litigation, Securities Litigation, 2007-2025
PHOENIX magazine, Top Lawyers, Commercial Litigation, 2025
Judicial Branch Distinguished Service Award, Awarded by Arizona Supreme Court Chief Justice Rebecca Berch for Outstanding Service and Contribution to the Arizona Judicial Branch, 2011
BTI Client Service All-Star Team, 2011
Arizona’s Finest Lawyers
Judge Learned Hand Award for Community Service, Arizona Chapter of American Jewish Committee, 2006
President’s Award, State Bar of Arizona, 2006
Top 50 Pro Bono Attorneys, 2001
News & Media
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