Christopher D. Lonn

Christopher D. Lonn Member

P: 602-262-5829
F: 602-495-2607
L: Phoenix

Christopher D. Lonn’s practice is focused on Arizona commercial litigation, arbitration and administrative law, with a specific concentration on construction law and litigation, securities and investment fraud litigation and arbitration, real estate disputes, business divorces, dental professional representation and employment law and litigation. For over 23 years, Chris has represented clients in a wide array of matters involving:  business disputes, commercial torts, commercial sales contracts, buy-sell agreements, non-competition agreements, non-solicitation agreements, non-disclosure agreements, trade secret litigation, defamation and breaches of fiduciary duty.  

Chris strives to take complex and confusing factual and legal issues and break them down into easily understandable concepts.  Another important aspect of Chris’s representation is to comprehensively evaluate the dispute or business matter from all angles and then select the most cost-effective and practical way to tackle it.

In connection with his securities and investment fraud litigation practice, Chris has experience representing broker-dealers and investors in proceedings before administrative agencies, including the Arizona Securities Division, the Arizona Corporation Commission, the Financial Industry Regulatory Authority (FINRA) and the Securities and Exchange Commission (SEC).  

Areas of Focus 

  • Commercial Litigation
  • Construction Law
  • Securities Litigation and Arbitration
  • Real Estate Litigation
  • Business Torts
  • Corporate governance and shareholder disputes

Representative Engagements

  • Successfully represented public customers against a national broker-dealer in securities fraud case in FINRA arbitration where claims for negligence, negligent supervision, suitability, lack of due diligence, selling away, breaches of fiduciary duty and other claims were also alleged.

  • Successfully obtained a unanimous defense verdict in a securities fraud lawsuit filed against husband and wife business owners.

  • Prosecution and defense of claims alleging all forms of business torts, breaches of contract and breaches of fiduciary duty.

  • Representation of businesses and individuals before the Arizona Corporation Commission.

  • Representation of broker-dealers in securities disputes.

  • Represents clients with regulatory inquiries, investigations, Wells’ responses, examinations under oath and defense of enforcement actions.

  • Represents licensed contractors in commercial litigation matters and before the Arizona Registrar of Contractors (ROC).

  • Represents dental and medical professionals before various administrative agencies.

  • Represented some of Arizona’s largest home builders in all forms of construction litigation and administrative proceedings before the Arizona Registrar of Contractors.

  • Represented legal professionals in business divorce disputes.

  • Represented a woman in a case that received national press coverage where her husband disappeared while on the job. This case appeared on various investigative television programs including “Unsolved Mysteries.” The mystery of this case was not solved because the husband’s body was never found. Ultimately, a judicial finding was entered stating that the widow’s husband was murdered during the course of his employment. This finding allowed the widow collect on various insurance policies and also to collect workman’s compensation benefits.

Articles, Publications and Presentations

  • Debate moderator between candidates running for Maricopa County Attorney (2004)

  • Debate moderator between candidates running for Arizona Attorney General (2003)

Honors, Appointments, and Awards

  • AV® Preeminent™ Peer Review Rated

Professional Affiliations

  • City of Scottsdale
    Judicial Appointments Advisory Board, Board Member, (2004-2010; two terms)
  • Maricopa County Superior Court
    Judge Pro Tem, (2004-2007)
  • Scottsdale Bar Association
    Member, (1997-Present)
    President, (2004-2005)
    Board of Directors, (1998-2006)
    Scottsdale Paiute Neighborhood Center, Volunteer Attorney, (1997-2006)
  • State Bar of Arizona
    Civil Practice and Procedure Committee, Member, (2003-2005)
  • Maricopa County Bar Association
    Member, (1997-Present)
    Ex Officio, Board of Directors, (2004-2005)

Admitted to Practice

  • Arizona, 1993
  • California, 1999

Court Admission

  • U.S. District Court, District of Arizona, 1993
  • U.S. Court of Appeals, Ninth Circuit, 1995
  • U.S. District Court, Northern District of California, 1999
  • U.S. District Court, Central District of California, 2002


  • J.D., University of the Pacific, McGeorge School of Law, 1993
    American Jurisprudence Award Recipient (1990)
    Moot Court Contestant
  • B.S., Arizona State University, Justice Studies, 1988
    magna cum laude