Areas of Practice
  • Brigham Young University, J. Rueben Clark Law School, J.D., summa cum laude, 1990, Order of the Coif, Editor-in-Chief, Brigham Young University Law Review
  • University of Calgary, B.S. in Psychology, 1986
Judicial Clerkships
  • Hon. Justice Clarence Thomas and former Chief Justice Warren E. Burger, US Supreme Court, 1992-1993
  • Hon. John T. Noonan, US Court of Appeals, Ninth Circuit, 1990-1991
Bar & Court Admissions
  • Arizona

Karl M. Tilleman

201 E. Washington Street
Suite 1600
Phoenix AZ 85004
TEL: +1 602 257 5244
FAX: +1 602 257 5299

Karl Tilleman is a seasoned trial lawyer and class action litigator with nearly three decades of experience handling high-stakes cases for many of the nation’s largest financial institutions and corporations.  He has significant experience with litigation (including arbitrations and class claims) involving antitrust, complex contract, insurance bad faith/punitive damages, healthcare, intellectual property, RICO, construction, and environmental disputes.

Mr. Tilleman leads Steptoe’s 120-lawyer Complex Commercial Disputes Group.  He played for the Canadian National Basketball Team in the 1984 and 1988 Olympics, setting a record for three-point shooting in the latter games that has never been broken.

Representative Matters

Recent and Current Matters:

  • Representing State Farm in complex coverage and bad-faith actions
  • Representing The Salt River Project in an antitrust and tort action
  • Represented the Harlem Globetrotters as lead trial counsel in an intellectual property action brought in Federal Court in Phoenix by Meadowlark Lemon, Curly Neal, and other former Globetrotter superstars
  • Represented the University of Southern California and Urban Partners in a multimillion-dollar antitrust and RICO lawsuit in Federal Court in Los Angeles, California
  • Represented AmeriChoice Corporation, and related entities, which collectively constituted one of the nation’s leading health maintenance enterprises specializing in managed healthcare for lower-income communities, in a variety of contract disputes and regulatory matters
  • Represented Western Union and obtained summary judgment or dismissal in contract disputes in Arizona and California, and in a major subpoena enforcement action versus the State of Arizona
  • Represented AIG and affiliated entities in complex insurance disputes in Arizona, Utah, and other jurisdictions
  • Represented Allstate Insurance Company and prevailed on summary judgment in numerous "bad faith" cases in federal and state courts across the country
  • Represented MetLife Bank in MERS foreclosure litigation in federal and state courts in Arizona, California, Nevada, and Utah, including multidistrict litigation in Arizona and putative nationwide and statewide class actions
  • Represented Insurance Company of the State of Pennsylvania (an AIG affiliate) and obtained summary judgment in a complex workers’ compensation and “institutional” bad-faith case
  • Represented a MetLife entity in California state court in a multimillion-dollar action on issues of agency, fraud, negligence, and breach of fiduciary duty arising from the alleged breach of a high-income life insurance policy


  • Legal 500 US, Litigation: Commercial Litigation, 2015, 2017
  • Legal 500 US, Litigation: International Litigation, 2017
  • Legal 500 US, Insurance: Advice to Insurers, 2017
  • Best Lawyers in America, Insurance Law, 2011 - 2018
  • Southwest Super Lawyers, Business Litigation, 2009 - 2017
  • Chambers USA: America’s Leading Business Lawyers, Litigation: General Commercial (Arizona), 2011-2012
  • Arizona's Finest Lawyers, 2011

Select News & Events

Selected Publications

  • Co-author, “Closing the Book on CERCLA Section 107 ‘Joint and Several’ Claims by Liable Parties"
    1999, 18 Va. Envtl. L.J. 160
  • Does the Tenth Amendment Pose Any Judicial Limit on the Commerce Clause After Garcia v. San Antonio Metropolitan Transit Authority and South Carolina v. Baker?
    1989, B.Y.U. L. Rev. 231