About Us


Human Rights Campaign 2022 Corporate Equality Index

Armstrong Teasdale earned the highest possible score: 100 percent.

Chambers-Ranked Attorneys

Twenty Armstrong Teasdale attorneys and eight practice areas were listed.

Benchmark Litigation 2018 Missouri Firm of the Year

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

Leadership Council on Legal Diversity (LCLD) Compass Award 2021

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, 2021

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

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

Armstrong Teasdale earned 36 first-tier metropolitan rankings in the 2022 edition.

Super Lawyers® and Rising Stars

Sixty-five attorneys were listed in 2021.

The Best Lawyers in America® 2021

More than 100 lawyers identified.

The Legal 500 U.K.

Ranked by Legal 500 U.K. 2022 as a leading U.K. firm in seven London practice areas. 

2020 BTI Client Service A-Team

Ranked a Standout in investing in client relationships and in client-facing communications.

2018 Inclusiveness @ Work Award

Presented by the Center for Legal Inclusiveness.

BTI Best at Alternative Fee Arrangements 2016

One of only 22 firms throughout the country recognized.

2018 BTI Brand Elite

For the second year in a row, corporate counsel rank the firm in the top 15 percent of all law firms for using technology in new ways to add value.

Largest Local Intellectual Property Practice

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

National Law Review 2018 Go-To Thought Leadership Award

Recognized for the breadth of our litigation coverage.

Juristat Top Patent Firm 2019

Recognized based on our performance relating to patents for mechanical engineering, manufacturing and products.

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
  • 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,
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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
3770 Howard Hughes Parkway
Suite 200
Las Vegas, NV 89169
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Las Vegas, Nevada
London, England
200 Strand
London, WC2R 1DJ
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Miami, FL
3250 Mary Street
Suite 102
Coconut Grove, FL 33133
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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
201 South Main Street
Suite 750
Salt Lake City, UT 84111
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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
Wilmington, DE
300 Delaware Avenue
Suite 210
Wilmington, DE 19801
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Wilmington, Delaware