Firm History

Armstrong Teasdale has a rich history with 120 years of experience counseling clients through their most complex legal challenges. Over the past century, the firm has grown tremendously and now boasts more than 640 lawyers and staff members in 13 offices throughout the U.S. and in the U.K.


Business lawyers Thomas Harper Cobbs (pictured) and John E. Bishop form a law partnership, Bishop and Cobbs, in St. Louis on January 1, 1901.


New partners are added regularly in the early years. In 1927, William Armstrong joins as an associate. He becomes a partner in 1931 and Armstrong is added to the firm name in 1939.


Kenneth Teasdale, a good friend of William Armstrong and well-known St. Louis-based trial lawyer, joins the firm and in 1949 Teasdale is added to the firm name.


William H. Webster joins the firm. After leaving in 1970, he goes on to serve as a judge for the U.S. District Court for the Eastern District of Missouri, the U.S. Court of Appeals for the Eighth Circuit, and is to date the only person to have served as director of both the FBI and the CIA.


Kenneth Teasdale’s son, Kenneth S.F. Teasdale, joins the firm after a distinguished career in Washington, D.C. with the U.S. Department of Justice.


The firm reorganizes, creating the positions of Managing Partner and Chairman, and Executive and Compensation committees. Thomas Remington (pictured) is designated the first chairman and Kenneth S. F. Teasdale as managing partner of the firm.


The firm merges with the St. Louis firm Schlafly, Griesedieck, Toft & Virtel, becoming Armstrong, Teasdale, Kramer, Vaughan & Schlafly. The firm grows to 83 lawyers. By end of the following year, Armstrong Teasdale is the third-largest law firm in the St. Louis area based on the number of attorneys.


The firm becomes the first law firm tenant of the Metropolitan Square building in downtown St. Louis, which was built on the same site as the firm’s first office in 1901.


The firm merges with Kansas City firm Dietrich, Davis, Dicus, Rowlands, Schmitt & Gorman, with the new firm name being Armstrong, Teasdale, Schlafly, Davis & Dicus.


Edwin Noel (pictured) is elected managing partner. Kenneth S.F. Teasdale is elected chairman.


The Jefferson City, Missouri, office opens.


The firm’s Professional Advancement of Women program is established; today called the Women’s Inclusion Network. The program is one of the first of its type at a private firm in the St. Louis region.


Richard Scherrer is elected managing partner.


The firm establishes the Michael C. Tramble Memorial Scholarship Fund at the University of Missouri School of Law, in memory of a promising young African-American associate at the firm who tragically lost his life.


Las Vegas office opens.


Michael Chivell is elected managing partner.


The St. Louis office moves into new, state-of-the-art space in Centene Plaza, a LEED-certified Gold building located in the business suburb of Clayton, Missouri. Centene Corporation is a client of the firm.


The firm is named to the Am Law 200, a list of the 200 largest law firms in the U.S. as ranked by The American Lawyer magazine.


Denver office opens, with the acquisition of Denver-based Steese Evans & Frankel P.C.


John Beulick (pictured) is elected to the role of managing partner. After almost a decade as managing partner, Michael Chivell is elected chairman.


Armstrong Teasdale expands to the East Coast with the opening of its Philadelphia office.


David Braswell is elected managing partner of the firm.


New York office opens with one of the largest real estate practices focusing on cooperative/condominium law in the city. Since 2019, the office has grown to include prominent attorneys in the corporate, white-collar criminal defense, commercial finance and bankruptcy, and intellectual property areas, among others.


Offices open in Boston, Salt Lake City (pictured), and Edwardsville, Illinois.


The firm boasts more than 560 attorneys and staff members across 11 offices in the U.S.


The firm establishes a Diversity, Equity and Inclusion department.


The firm expands its East Coast presence by opening an office in Wilmington, Delaware.


The firm establishes a presence in Europe with the addition of London-based law firm Kerman & Co. The group of over 50 lawyers and staff bolsters Armstrong Teasdale’s roster to over 340 lawyers and over 300 staff professionals around the world.


David Braswell is elected chairman of the firm and Patrick Rasche is elected managing partner. Michael Chivell, who has spent the majority of his career at the firm and served for five years as chairman, assumes the role of chairman emeritus.

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  • Las Vegas, NV
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  • 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
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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New York, NY
919 Third Ave., 37th Floor
New York, NY 10022
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New York City
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