Harrison Hull & MUMM PLLC

Since 1993, Harrison Hull & Mumm PLLC has served with distinction the defense litigation needs of insurance companies and corporate clients throughout Texas, Oklahoma, and New Mexico.

The firm is dedicated to helping businesses and individuals win disputes and effectively plan to prevent them. Client relationships are prized. Open and honest communication is paramount. Cost-effective representation is the objective.


Representative Clients

  • AIG
  • America First Insurance
  • American Fidelity Assurance Company
  • American Management Corporation
  • American Mercury Insurance Group
  • American Underwriting Managers
  • Bituminous Insurance Company
  • Cambridge Integrated Services
  • Equity Fire & Casualty Insurance Company
  • Essex Insurance Company
  • Federated Mutual Insurance
  • GEICO Direct
  • Germania Insurance
  • Golden Eagle Insurance
  • HARCO National Insurance Company
  • Lumberman’s Underwriting
  • Mid-Continent Group
  • National American Insurance Company
  • Occidental Fire & Casualty Company
  • Prudential Insurance
  • Republic Insurance
  • Scottsdale Insurance Company
  • Southern Trust Insurance Company
  • Texas Municipal League Intergovernmental Risk Pool
  • Texas Mutual Insurance Company
  • Texas Property and Casualty Insurance Guaranty Association
  • Wausau Insurance
  • Western Guaranty Fund
  • Club Corp.
  • EGL, Inc.
  • Gully Transportation
  • Henkels & McCoy
  • Mastec, Inc.
  • McCoy’s Building Supply
  • MRB Construction
  • Schutt Sports
  • Sta-Dri Company, Inc.
  • Star Transportation
  • Total Petroleum, Inc.
  • UtiliQuest, L.L.C.
  • Verizon Communications
  • BJC Management, Inc.
  • CalHar Construction
  • Camino Construction
  • Douglass Distributing, Inc.
  • JCM Contracting
  • Landstar
  • Magni-Fab Southwest
  • Magni-Power Company
  • Rushing Paving
  • Salon at Eaton Court
  • TGR Constructors
  • City of McKinney
  • City of Frisco

Awards + Accolades






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Cave v. Cardenas: Defense Verdict for Harrison + Hull

On November 13, 2015, Harrison + Hull attorneys Richard Harrison and Matthew Mumm went to trial in the 17th Judicial District Court of Tarrant...

Sparks v. Windal: Defendant Not Negligent

In this case, Plaintiff Sparks sued Defendants Brian and Bethany Windal and made a demand of $75,000. Harrison + Hull attorneys Richard Harrison and...

Luttrell v. Leddy-Weaver: Jury Deliberated for Just 2 Hours

It only took two hours for the jury to render a verdict in the case of Luttrell v. Leddy-Weaver. The Plaintiff sought approximately $40,000 in...

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