Clients around the world seek out Armstrong Teasdale’s Antitrust and Trade Practices lawyers to counsel and protect them in matters involving global antitrust and competition issues. In today’s fast-paced business environment, we provide proactive and practical counsel to help our clients achieve their goals while managing risks and maintaining compliance.

Armstrong Teasdale's lawyers provide commercially focused, competition and regulatory advice and support to the firm’s clients ranging from antitrust compliance and training to cartel and competition law investigations, as well as merger control filings.

Our lawyers advise both public and private companies and have significant experience with premerger filings under the Hart-Scott-Rodino Antitrust Improvements Act, the EU Merger Regulation and the U.K. Enterprise Act.

We work closely with the Federal Trade Commission and Department of Justice in the U.S., the EU Commission and the U.K. Competition and Markets Authority, as well as other government agencies as appropriate on each individual transaction to address and resolve issues.

In addition, our lawyers provide counsel on issues that impact business planning, statutory and regulatory compliance, international trade and sanctions, and the formation and management of business relationships with suppliers, customers, industry associations and competitors.

Through our European offices, we are able to provide seamless advice to clients on global trade and competition laws.

We counsel our clients on a wide variety of matters, including:

  • Antitrust and competition investigations
  • Market conduct and dominance
  • Compliance audits, internal investigations and training
  • U.S. and international merger control, including acquisitions and divestitures
  • Antitrust and competition litigation
  • International trade and sanctions
  • EU product safety and environmental directives
  • Distribution, ecommerce, supply and licensing relationships
  • Marketing and advertising activities
  • Membership and participation in trade associations
  • Pricing arrangements and restrictions
  • Sectoral Regulation (utilities, communications and transport)
  • Public procurement
  • Unfair and deceptive trade practices
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
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Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
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Boston, Massachusetts
Chicago, IL
100 North Riverside Plaza
Suite 1500
Chicago, IL 60606-1520
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Chicago, Illinois
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
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Denver, Colorado
Dublin, Ireland
Fitzwilliam Hall, Fitzwilliam Place
Dublin 2, Ireland
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Edwardsville, IL
115 N. Second St.
Edwardsville, IL 62025
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Edwardsville, Illinois
Jefferson City, MO
101 E. High St.
First Floor
Jefferson City, MO 65101
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Jefferson City, Missouri
Kansas City, MO
2345 Grand Blvd.
Suite 1500
Kansas City, MO 64108
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Kansas City, Missouri
Las Vegas, NV
7160 Rafael Rivera Way
Suite 320
Las Vegas, NV 89113
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Las Vegas, Nevada
London, England
Royal College of Surgeons of England
38-43 Lincoln’s Inn Fields
London, WC2A 3PE
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Miami, FL
355 Alhambra Circle
Suite 1200
Coral Gables, FL 33134
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New York, NY
7 Times Square, 44th Floor
New York, NY 10036
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Orange County, CA
19800 MacArthur Boulevard
Suite 300
Irvine, CA 92612
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Philadelphia, PA
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
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Philadelphia, Pennsylvania
Princeton, NJ
100 Overlook Center
Second Floor
Princeton, NJ 08540
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Princeton, New Jersey
Salt Lake City, UT
222 South Main St.
Suite 1830
Salt Lake City, UT 84101
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Salt Lake City, Utah
St. Louis, MO
7700 Forsyth Blvd.
Suite 1800
St. Louis, MO 63105
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St. Louis, Missouri
Washington, D.C.
1717 Pennsylvania Avenue NW
Suite 400
Washington, DC 20006
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Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
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Wilmington, Delaware