David B. Rosenbaum

Bet-the-Company Litigation

5.0 (1 reviews)

Phoenix, Arizona

42+ years experience

Osborn Maledon PA

Updated: Jan 03, 2026

Contact Information

602-640-9000

https://www.omlaw.com/drosenbaum/

The Phoenix Plaza, 2929 North Central Avenue, Suite 2000, Phoenix, AZ 85012-2793

Create an account to contact this attorney

Bio

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.

Practice Areas

Bet-the-Company Litigation

Awards & Recognition

Lawyer of the Year: Litigation - Intellectual Property, Phoenix (2024)
Lawyer of the Year: Litigation - Securities, Phoenix (2024)
Lawyer of the Year: Litigation - Securities, Phoenix (2021)
Lawyer of the Year: Litigation - Intellectual Property, Phoenix (2020)
Lawyer of the Year: Bet-the-Company Litigation, Phoenix (2016)
Lawyer of the Year: Litigation - Securities, Phoenix (2014)
Lawyer of the Year: Bet-the-Company Litigation, Phoenix (2011)
Recognized: Bet-the-Company Litigation
Recognized: Commercial Litigation
Recognized: Litigation - Construction
Recognized: Litigation - Intellectual Property
Recognized: Litigation - Mergers and Acquisitions
Recognized: Litigation - Securities
Special Focus: Civil Litigation
Special Focus: Class Actions
Special Focus: Commercial Disputes
Special Focus: Complex Litigation
Special Focus: COVID-19
Special Focus: Defendants
Special Focus: Intellectual Property
Special Focus: SEC Enforcement
Special Focus: Stockholders' Suits

Recognized in Best Lawyers since 2005

Education

Georgetown University, J.D., graduated 1983
University of Pennsylvania, B.A., graduated 1979

Get Directions on Google Maps

Reviews

Paul Anderson

2 weeks ago

A Master Strategist in Complex Commercial Litigation

When our company faced a challenging securities-related lawsuit, we turned to David Rosenbaum. His 40+ years of experience, particularly his deep knowledge of securities litigation, was immediately evident. He guided our board through the complexities with a calm, strategic approach that inspired confidence. His recent recognition as Lawyer of the Year was no surprise; his expertise is profound. David and his team at Osborn Maledon crafted a brilliant defense that led to a highly favorable resolution. He is not just a superb legal mind but also a trusted advisor. We are profoundly grateful for his exceptional service and outstanding result.