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“Mark Arnold sets the gold standard for appellate practice in St. Louis.”

Missouri Supreme Court Justice Richard Teitelman


Mark strives to think outside the box and bring a fresh approach to each case. A litigator for 40 years, Mark is a seasoned debater who is energized by outsmarting his opposition.

Mark puts that competitive nature to work for his clients as he leads them through all phases of complex litigation. His practice focuses on antitrust, securities pension and welfare, toxic tort and product liability matters. He also handles appeals of major cases, interpreting complex federal statutes such as the Employee Retirement Income Security Act (ERISA) and the Racketeer Influenced and Corrupt Organizations Act (RICO).

In addition, Mark has extensive experience defending class actions.

“Mark Arnold sets the gold standard for appellate practice in St. Louis.”

Missouri Supreme Court Justice Richard Teitelman




  • The Best Lawyers in America®, Appellate Practice, Commercial Litigation, 2001-2022
  • Missouri Lawyers Media, POWER List for Appellate Law, 2021
  • Best of CLE Spotlight, MoBar CLE, 2013
  • Missouri & Kansas Super Lawyers, Appellate, 2005-2020; Top 100, 2006; Top 50 St. Louis, 2005-2008
  • Missouri Bar Pro Bono Wall of Fame, 2012
  • The Missouri Bar, W. Oliver Rasch Award for Outstanding Article, 1996


  • J.D., Washington University in St. Louis School of Law
    • Order of the Coif
    • Washington University Law Quarterly, editor-in-chief
  • A.B., Oberlin College


  • Missouri
  • U.S. District Court, Northern District of Florida
  • U.S. District Court, Southern District of Illinois
  • U.S. District Court, Eastern District of Missouri
  • U.S. District Court, Western District of Missouri
  • U.S. Court of Appeals, First Circuit
  • U.S. Court of Appeals, Second Circuit
  • U.S. Court of Appeals, Third Circuit
  • U.S. Court of Appeals, Fourth Circuit
  • U.S. Court of Appeals, Fifth Circuit
  • U.S. Court of Appeals, Sixth Circuit
  • U.S. Court of Appeals, Seventh Circuit
  • U.S. Court of Appeals, Eighth Circuit
  • U.S. Court of Appeals, Ninth Circuit
  • U.S. Court of Appeals, Tenth Circuit
  • U.S. Court of Appeals, Eleventh Circuit
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of Appeals, District of Columbia Circuit
  • U.S. Supreme Court

Professional Memberships and Certifications

  • American Health Lawyers Association
  • American Law Institute, Life Member, 2014-present 
  • The Missouri Bar
  • Missouri Supreme Court, Civil Rules Committee; Ad Hoc Committee on Expert Discovery Rules
Featured Experience

Lender Prevails in Real Estate Class Action Suit

In a case in the U.S. District Court in Minnesota, Mark successfully defeated class certification for borrowers who alleged that the yield spread premium a lender paid a mortgage loan broker constituted illegal kickbacks and fee splitting under the Real Estate Settlement Practices Act (RESPA). In response to the defendants’ motion for reconsideration, the court reversed its earlier decision granting class certification and also granted the defendants’ motions for summary judgment on the liability issues, dismissing the claims with prejudice.

Additional Experience
  • Obtained summary judgment on all claims asserted against client in the mortgage banking industry in complex statewide class action regarding non-judicial foreclosures.
  • Obtained outright reversal in Arkansas Court of Appeals of a million-dollar wrongful death judgment against a mall. A disgruntled ex-employee of a mall tenant killed the manager who had fired him. The court held that a landlord owes no duty to an employee of a tenant.
  • Successfully litigated patents and patent licensing for Bayer seed and other agricultural products.
  • Represented Farm Credit entities, including AgriBank, its predecessors and various production-credit associations, on general litigation matters.
  • Counseled lenders and buyers of farm products on enforceability of liens on agricultural products.
  • Obtained favorable ruling from Eighth Circuit Court of Appeals that affirmed lower court order denying remand and class certification in Class Action Fairness Act (CAFA) lawsuit against Chicago Title Insurance Co.
  • Defeated class certification in major consumer fraud case against national postsecondary education provider in Madison County, Illinois. Client was accused of violating Illinois Consumer Fraud Act and Private Business and Vocational Schools Act by not providing accurate information to prospective students for seven years. Plaintiffs' demand to settle case was more than $20 million. State appeals court denied class certification.
Case Studies
Conagra Brands

Workers from Conagra’s Russellville, Arkansas facility filed a wage-and-hour class and collective action lawsuit alleging violations of the Fair Labor Standards Act (FLSA) and the Arkansas Minimum Wage Act (AMWA), claiming that they should have been paid for time spent donning and doffing before and after shifts.

Blog | September 03, 2021
Kansas Ag-Gag Law Update - September 2021
Blog | August 11, 2021
Arkansas Ag Gag Update
Blog | August 09, 2021
Update on Cattle Checkoff
Blog | June 29, 2021
Update on Union Access to Property
Blog | April 08, 2021
Kansas Ag-Gag Update
Blog | December 09, 2020
Meatless Meat Update XII
Blog | November 11, 2020
Meatless Meat Update XI
Blog | October 21, 2020
Meatless Meat Regulatory Update
Blog | October 08, 2020
Update on Meatless Meat
Blog | October 08, 2020
Update on Minnesota Farm Winery
Blog | June 19, 2020
North Carolina Ag-Gag Law Update
Blog | June 12, 2020
Ag-Gag Law Update (June 2020)
Blog | June 04, 2020
Meatless Meat Update X
Blog | April 20, 2020
Update on Checkoff Dues
Blog | April 14, 2020
Meatless Meat Update IX
Blog | February 27, 2020
Meatless Meat Update VIII
Blog | February 05, 2020
Ag-Gag Law Update VIII
Blog | February 04, 2020
Meatless Meat Update VII
Blog | January 03, 2020
Latest Iowa "Ag Gag" Law Update
Blog | December 04, 2019
Proposition 12 Update
Blog | November 07, 2019
Meatless Meat Update VI
Blog | October 21, 2019
Update on California Proposition 12
Blog | October 15, 2019
Update on Meatless Meet Negotiations
Blog | September 16, 2019
Meatless Meat Update IV
Blog | July 30, 2019
Minnesota Wine Update
Blog | July 10, 2019
Update: Meatless Meat
Blog | July 03, 2019
July Iowa "Ag Gag" Law Update
Blog | July 03, 2019
Udder Nonsense Update
Blog | July 01, 2019
Tennessee Alcohol Update
Blog | May 09, 2019
Minnesota Wine Regulation
Blog | April 24, 2019
Iowa "Ag Gag" Law Update
Blog | March 27, 2019
Update: Ag-Gag Law
Blog | March 12, 2019
New Ag-Gag Law Update
Blog | January 17, 2019
Update on California Egg Law
Blog | January 16, 2019
The Latest Ag-Gag Law Update
Blog | January 10, 2019
The Latest Foie Gras Update
Blog | January 02, 2019
Packers & Stockyard Act Update
Blog | December 27, 2018
Meatless Meat Update
Blog | December 27, 2018
California Foie Gras/Egg Update
Blog | November 28, 2018
Dusky Frog Update III
Blog | November 13, 2018
Ag-Gag Update
Blog | November 05, 2018
Compelled Speech
News Releases | August 15, 2019
Husch Blackwell Places 143 Lawyers in 2020 BL Rankings' Best Lawyers in America®

The firm has eight "Lawyers of the Year" and 11 attorneys appearing on the list for the first time.

News Releases | November 14, 2018
Thomson Reuters' Missouri & Kansas Super Lawyers and Rising Stars 2018 Names 58 Husch Blackwell Attorneys

Husch Blackwell has 58 attorneys in the 2018 edition of Missouri & Kansas Super Lawyers and Rising Stars.

Outside the Office

Mark is an avid Major League Baseball fan. He takes in as many St. Louis Cardinals games as he can.

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