Insights

Diversity Recognition Armstrong Teasdale’s Equality 100 award in the Corporate Equality Index signals a strong commitment to diversity and workplace inclusion, presenting an opportunity to position services that support ESG reporting, DEI program development, and compliance advisory for clients with similar values.

Mid-Market Reach With 501-1000 employees and revenues in the 100–250 million range, the firm sits in the robust mid-market segment, suggesting a sales focus on corporate legal needs such as M&A, regulatory compliance, contracts, and industry-specific advisory for mid-sized companies seeking scalable legal support.

Global Clientele Longstanding global client relationships imply capacity for cross-border and multi-jurisdictional matters, offering sales opportunities to firms seeking international legal coverage, 24/7 response needs, and integrated global service delivery.

Security and Privacy Given the emphasis on privacy policies and legal notices, there is potential to offer cybersecurity, data privacy, and risk assessment services to clients who require strong information governance and regulatory compliance frameworks.

Public Market Position Being among the 200 largest U.S. law firms and recognized in Equality initiatives provides a platform to pitch premium advisory services for growth, talent management, and branding-focused initiatives to prospective corporate clients seeking established, reputable partners.

Similar companies to Armstrong Teasdale

Armstrong Teasdale's Email Address Formats

Armstrong Teasdale uses at least 2 format(s):
Armstrong Teasdale Email FormatsExamplePercentage
FLast@armstrongteasdale.comJDoe@armstrongteasdale.com
96%
FirstLast@armstrongteasdale.comJohnDoe@armstrongteasdale.com
2%
Last@armstrongteasdale.comDoe@armstrongteasdale.com
2%
FLast@atllp.comJDoe@atllp.com
94%
Last@atllp.comDoe@atllp.com
4%
FMiddleLast@atllp.comJMichaelDoe@atllp.com
1%
FiLast@atllp.comJoDoe@atllp.com
1%

Frequently Asked Questions

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.

How much revenue does Armstrong Teasdale generate?

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As of August 2026, Armstrong Teasdale's annual revenue is estimated to be $100M - $250M.

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 August 2026, Armstrong Teasdale has approximately 609 employees across 3 continents, including North AmericaEuropeAsia. Key team members include Chief Financial Officer - Cpa: A. D. S.Chief Growth Officer: C. D.Partner: J. E. T.. 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 logo

Armstrong Teasdale

Law PracticeMissouri, United States501-1000 Employees

Armstrong Teasdale LLP is a law practice headquartered in St. Louis, Missouri, serving clients around the globe. Founded in 1901, the firm has grown to be one of the 200 largest law firms in the United States. With a 125-year history, it has developed long-term relationships with a diverse client base.

The firm operates within the law practice industry and serves both large and small clients across a broad range of matters. In January 2025, Armstrong Teasdale was recognized with an Equality 100 award in the Human Rights Campaign Foundation's Corporate Equality Index.

Section iconCompany Overview

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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