Insights

Strong Reputation Armstrong Teasdale is part of the top 200 largest law firms in the U.S., indicating a well-established reputation that can facilitate premium service offerings and high-value contracts.

Diversity Recognition The firm received the Equality 100 award in the 2025 Corporate Equality Index, highlighting a commitment to diversity and inclusion that can appeal to clients prioritizing ESG and corporate social responsibility.

Mid-Market Segment With annual revenues between $100 million and $250 million and around 613 employees, Armstrong Teasdale operates in the mid-market legal segment, representing potential upsell opportunities for specialized legal tech or consulting solutions.

Growth Potential As a long-standing firm with over a century of history, Armstrong Teasdale may be seeking innovative legal technologies, practice management solutions, or consulting services to sustain and accelerate growth.

Geographic Focus Located in St. Louis with a significant regional presence, the firm might be interested in localized legal solutions, regional compliance services, or community-focused corporate offerings.

Similar companies to Armstrong Teasdale

Armstrong Teasdale Tech Stack

Armstrong Teasdale's Email Address Formats

Armstrong Teasdale uses at least 2 format(s):
Armstrong Teasdale Email FormatsExamplePercentage
FLast@armstrongteasdale.comJDoe@armstrongteasdale.com
95%
FirstLast@armstrongteasdale.comJohnDoe@armstrongteasdale.com
2%
Last@armstrongteasdale.comDoe@armstrongteasdale.com
1%
FMiddleLast@armstrongteasdale.comJMichaelDoe@armstrongteasdale.com
1%
First_Last@armstrongteasdale.comJohn_Doe@armstrongteasdale.com
1%
FLast@atllp.comJDoe@atllp.com
95%
Last@atllp.comDoe@atllp.com
3%
FMiddleLast@atllp.comJMichaelDoe@atllp.com
1%
FiLast@atllp.comJoDoe@atllp.com
1%

Frequently Asked Questions

Where is Armstrong Teasdale's headquarters located?

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Armstrong Teasdale's main headquarters is located at 7700 Forsyth Boulevard Suite 1800 St. Louis, Missouri 63105 United States. The company has employees across 3 continents, including North AmericaEuropeAsia.

What is Armstrong Teasdale's phone number?

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You can contact Armstrong Teasdale's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Armstrong Teasdale's official website and social media links?

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Armstrong Teasdale's official website is atllp.com and has social profiles on LinkedIn.

What is Armstrong Teasdale's NAICS code?

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Armstrong Teasdale's NAICS code is 54111 - Offices of Lawyers.

How many employees does Armstrong Teasdale have currently?

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As of March 2026, Armstrong Teasdale has approximately 612 employees across 3 continents, including North AmericaEuropeAsia. Key team members include Chief Diversity Officer: K. S.Partner: J. D.Partner: J. S.. Explore Armstrong Teasdale's employee directory with LeadIQ.

What industry does Armstrong Teasdale belong to?

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Armstrong Teasdale operates in the Law Practice industry.

What is Armstrong Teasdale's email format?

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Armstrong Teasdale's email format typically follows the pattern of FLast@armstrongteasdale.com. Find more Armstrong Teasdale email formats with LeadIQ.

When was Armstrong Teasdale founded?

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Armstrong Teasdale was founded in 1901.

Armstrong Teasdale

Law PracticeMissouri, United States501-1000 Employees

For more than a century, Armstrong Teasdale has forged long-term relationships with clients large and small around the globe. Since our founding in 1901, we have grown to be one of the 200 largest law firms in the U.S.

The information on this platform has been prepared by Armstrong Teasdale LLP for informational purposes only and is not legal advice or a solicitation to provide legal services. Past results afford no guarantee of future results. Every case is different and must be judged on its own merits. THE CHOICE OF A LAWYER IS AN IMPORTANT DECISION AND SHOULD NOT BE BASED SOLELY UPON ADVERTISEMENTS. Although we attempt to ensure that the information on this site is complete, accurate, and up-to-date, we assume no responsibility for its completeness, accuracy or timeliness. The information on this site is not intended to create, and receipt of it does not constitute, a lawyer-client relationship. Please review Armstrong Teasdale LLP’s Website Disclaimer (https://www.armstrongteasdale.com/disclaimer/) and International Legal Notices (https://www.armstrongteasdale.com/legal-notices/), which extend to its associated social media profiles. Please read our Global Privacy Policy (https://www.armstrongteasdale.com/privacy/) to find out how Armstrong Teasdale LLP and its subsidiaries process personal information. Your engagement on this platform is subject to the privacy policy and practices of LinkedIn.  

NOTE: We will never ask any applicant to pay to apply or supply credit card or bank account information to obtain a job with our firm. A legitimate email from Armstrong Teasdale LLP will always come from an email ending in armstrongteasdale.com or atllp.com. To confirm any communication about a potential job with Armstrong Teasdale, please contact our main office at 314-621-5070.

Section iconCompany Overview

Headquarters
7700 Forsyth Boulevard Suite 1800 St. Louis, Missouri 63105 United States
Phone number
Website
atllp.com
NAICS Code
54111 - Offices of Lawyers
Founded
1901
Employees
501-1000

Section iconFunding & Financials

  • $100M$250M

    Armstrong Teasdale's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $100M$250M

    Armstrong Teasdale's revenue is estimated to be in the range of $100M$250M

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