Armstrong Teasdale’s Complex Commercial Litigation practice is comprised of elite, experienced trial lawyers with uncommon insight into how to navigate and litigate increasingly complex, high-stakes disputes.

Our team has tried hundreds of cases for both plaintiffs and defendants in federal and state courts, as well as regulatory bodies all over the country. Our experience spans every significant category of commercial litigation, including breach of contract, business torts, RICO, consumer fraud, regulatory violations, antitrust, shareholder derivative actions, breach of fiduciary duty, trade secret misappropriation, Lanham Act violations, copyright infringement, unfair competition, class actions and mass torts.

Companies routinely trust Armstrong Teasdale’s lawyers with disputes of such consequence; they could impact their viability or even an entire industry. Our lawyers have managed complex matters in over 30 states, are familiar with appellate and trial courts across the country, and have the breadth and depth to help our clients achieve the best possible outcomes. Our clients have called us “fantastic litigators” and “zealous advocates” in Chambers USA: America's Leading Lawyers in Business, where several of our trial lawyers are ranked for Commercial Litigation.

Our sole, driving purpose when representing a client is to quickly identify and devise a strategy to achieve the client’s goals. In doing so, our lawyers strive to understand all aspects of the dispute and how those issues affect the client’s business. Our lawyers’ extensive trial experience uniquely positions Armstrong Teasdale to nimbly implement virtually any strategy the client desires, from a quick and effective resolution to full-blown trial and appeal, if necessary. Based on their experience, our lawyers possess the vision and understanding of the impact decisions made today will have at trial, several months or years later. With this demonstrated trial experience and forward-thinking vision, our clients receive the most effective representation.

As a firm, we possess the tools and talent to achieve favorable results for clients in the courtroom. Our in-house litigation support department, Lawgical Choice, allows our lawyers to rapidly and proficiently gather, organize, identify and produce gigabytes of our client’s data in a cost-effective manner. And because we are based in smaller, less expensive metropolitan centers, our rates are often substantially less than those of traditional, large litigation practices, which not only allows our clients to save millions of dollars in legal fees, but also empowers them with the flexibility to litigate their disputes so as to reach the optimal result, rather than having to sacrifice potential advantage because realizing those advantages may be cost prohibitive under the rate structures of other firms.

Armstrong Teasdale lawyers work across disciplines to leverage our experience for each client and situation. We also work across a variety of industries, including financial services and banking, technology and manufacturing, consumer products, agribusiness and food, and health care and life sciences.

Contact Us
  • Worldwide
  • Boston, MA
  • Chicago, IL
  • Denver, CO
  • Dublin, Ireland
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • Miami, FL
  • New York, NY
  • Orange County, CA
  • Philadelphia, PA
  • Princeton, NJ
  • Salt Lake City, UT
  • St. Louis, MO
  • Washington, D.C.
  • Wilmington, DE
abstract image of world map
Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
Google Maps
Boston, Massachusetts
Chicago, IL
100 North Riverside Plaza
Suite 1500
Chicago, IL 60606-1520
Google Maps
Chicago, Illinois
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
Google Maps
Denver, Colorado
Dublin, Ireland
Fitzwilliam Hall, Fitzwilliam Place
Dublin 2, Ireland
Google Maps
Edwardsville, IL
115 N. Second St.
Edwardsville, IL 62025
Google Maps
Edwardsville, Illinois
Jefferson City, MO
101 E. High St.
First Floor
Jefferson City, MO 65101
Google Maps
Jefferson City, Missouri
Kansas City, MO
2345 Grand Blvd.
Suite 1500
Kansas City, MO 64108
Google Maps
Kansas City, Missouri
Las Vegas, NV
7160 Rafael Rivera Way
Suite 320
Las Vegas, NV 89113
Google Maps
Las Vegas, Nevada
London, England
Royal College of Surgeons of England
38-43 Lincoln’s Inn Fields
London, WC2A 3PE
Google Maps
Miami, FL
355 Alhambra Circle
Suite 1200
Coral Gables, FL 33134
Google Maps
Photo of Miami, Florida
New York, NY
7 Times Square, 44th Floor
New York, NY 10036
Google Maps
New York City skyline
Orange County, CA
19800 MacArthur Boulevard
Suite 300
Irvine, CA 92612
Google Maps
Philadelphia, PA
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
Google Maps
Philadelphia, Pennsylvania
Princeton, NJ
100 Overlook Center
Second Floor
Princeton, NJ 08540
Google Maps
Princeton, New Jersey
Salt Lake City, UT
222 South Main St.
Suite 1830
Salt Lake City, UT 84101
Google Maps
Salt Lake City, Utah
St. Louis, MO
7700 Forsyth Blvd.
Suite 1800
St. Louis, MO 63105
Google Maps
St. Louis, Missouri
Washington, D.C.
1717 Pennsylvania Avenue NW
Suite 400
Washington, DC 20006
Google Maps
Photo of Washington, D.C. with the Capitol in the foreground and Washington Monument in the background.
Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
Google Maps
Wilmington, Delaware