About Us


Human Rights Campaign 2022 Corporate Equality Index

Armstrong Teasdale earned the highest possible score: 100 percent.

Chambers-Ranked Lawyers

Twenty-five Armstrong Teasdale lawyers and eight practice areas were listed.

Leadership Council on Legal Diversity (LCLD) Compass Award 2022

Earned by participating in LCLD programs designed to build a more open and diverse legal profession.

Leadership Council on Legal Diversity (LCLD) Top Performer Award, 2022

Recognizes organizations in the top 20% for participation in LCLD programs and activities.

The Legal 500 U.K.

Ranked by Legal 500 U.K. 2023 as a leading U.K. firm in four London practice areas and three industry sectors. 

U.S. News & World Report list of “Best Law Firms”

Armstrong Teasdale earned 33 first-tier metropolitan rankings in the 2023 edition.

Super Lawyers® and Rising Stars

Sixty-six lawyers were listed in 2022.

The Best Lawyers in America® 2023

More than 130 lawyers identified.

Benchmark Litigation 2018 Missouri Firm of the Year

One firm that has excelled in litigation in the past year is selected per state.

2022 BTI Client Service A-Team

Armstrong Teasdale was ranked a Standout in five of the 17 activities that clients value most, consider most important, and have the most influence on hiring and rate decisions in driving superior client relationships.

Largest Local Intellectual Property Practice

Ranked by the St. Louis Business Journal based on number of local intellectual property and licensed patent lawyers. The firm's IP/patent practice is recognized by Business Journals in markets across the country. 

Contact Us
  • Worldwide
  • Boston, MA
  • Denver, CO
  • Dublin, Ireland
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • Miami, FL
  • New York, NY
  • 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
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
1980 Festival Plaza Drive, Suite 750
One Summerlin
Las Vegas, NV 89135
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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 1250
Coral Gables, FL 33134
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New York, NY
7 Times Square, 44th Floor
New York, NY 10036
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New York City skyline
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.
1050 Connecticut Avenue NW
Suite 500
Washington, DC 20036
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Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
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Wilmington, Delaware