David's practice focuses on complex commercial litigation in the state and federal courts. David has represented public companies and their officers and directors in numerous securities fraud class actions, represented Fortune 50 companies in a wide range of complex commercial litigation matters, including matters involving intellectual property disputes, represented a major telecommunications company in an array of commercial litigation matters, represented companies in sales and use tax disputes, and represented national and local companies in employment controversies, including class-action discrimination lawsuits. As past President of the Federal Bar Association and Lawyer Representative to the Ninth Circuit Judicial Conference, David has developed knowledge and experience in the finer points of prosecuting complex litigation in the federal courts.
Lawyer Profile

David B. Rosenbaum
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Recognized Since:2005
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Recognized in:Bet-the-Company LitigationCommercial Litigation...
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Law School:Georgetown University
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Website:
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Firm's Phone Number:
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Location:The Phoenix Plaza, 21st Floor2929 North Central AvenuePhoenix, AZ 85012-2793
Lawyer Bio
Education:
- Georgetown University , J.D., graduated 1983
- University of Pennsylvania , B.A., graduated 1979
Bar Admissions:
- Arizona, 1984
- District of Columbia, 1985
Named "Lawyer of the Year" by Best Lawyers for:
- 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)
Recognized in The Best Lawyers in America for work in:
- Bet-the-Company Litigation
- Commercial Litigation
- Litigation - Construction
- Litigation - Intellectual Property
- Litigation - Mergers and Acquisitions
- Litigation - Securities
Federal Clerkships:
- United States District Court
Special Focus:
- Civil Litigation
- Class Actions
- Commercial Disputes
- Complex Litigation
- COVID-19
- Defendants
- Intellectual Property
- SEC Enforcement
- Stockholders' Suits
Lawyer Client Comments
"David is a great lawyer. He is very smart, very dedicated to his clients and their success, and he is very easy to work with. He is one of the first lawyers we think of for litigation matters."
"David Rosenbaum is an outstanding litigation attorney that has consistently done an outstanding job of representing our company."
"David is everything that you would want in litigation counsel. His vast intellectual prowess and experience allows him to cost-consciously maneuver through all types of litigation. David's judgment is excellent and his ability to communicate intelligently and concisely, both in court and with his clients, make him a real go-to lawyer."
Kristen Weathersby, Cox Enterprises, Inc., Atlanta
"David is an outstanding trial lawyer with a great business sense. He is very experienced in the federal courts in the Ninth Circuit, as well as in all Arizona tribunals. David has hired and developed outstanding litigation associates, and is not afraid to delegate real work to them, unlike some partners who are fearful of delegating to junior lawyers. He's incredibly responsive any time of the day or night, even though he maintains a very busy schedule and is often out of the office in depositions, trial appearances, hearings, etc."
Robin Sangston, Cox Communications, Inc., Atlanta
Firm Details
Osborn Maledon, P.A.
http://www.omlaw.com
Headquarters
The Phoenix Plaza, 21st Floor
2929 North Central Avenue
Phoenix, AZ 85012-2793
(602) 640.9000