Name

Armstrong Teasdale

Legal name

Armstrong Teasdale LLP

Website

https://armstrongteasdale.com

Company type

Private

Founded year

1901

Operating status

Operating

Headcount range

501–1,000 employees

Ownership category

akta.pro rank

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Legal Services Fees: Armstrong Teasdale generates revenue by providing a comprehensive range of legal services to enterprise, mid-market, and smaller clients. Services span corporate law, litigation, intellectual property, employment, real estate, tax, securities, bankruptcy, and regulatory matters. Revenue is derived from client fees for legal representation, counsel, and advisory services.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Armstrong Teasdale is a full-service law firm that delivers legal representation, counsel, and advisory services across more than 50 practice areas (corporate, litigation, intellectual property, employment and labor, M&A, real estate, tax, securities, bankruptcy, technology transactions, government contracts, data privacy) and 10 industry verticals (technology, financial services and banking, healthcare and life sciences, manufacturing, energy and utilities, consumer products, etc.). Services are sold on a per-matter basis to corporations, government entities, mid-market companies, and emerging growth companies.

Product overview

Armstrong Teasdale LLP is a full-service law firm providing legal services across multiple practice areas including Corporate, Litigation, Intellectual Property, Employment and Labor, Mergers and Acquisitions, Real Estate, Tax, Technology Transactions, and Government Contracts. The firm serves clients across key industries such as Technology, Financial Services and Banking, Health Care and Life Sciences, Manufacturing and Innovation, Energy and Utilities, and Consumer Products. The firm operates through two subsidiaries: AT Government Strategies, LLC (government relations and strategic counsel) and ATGS Adviser Compliance (compliance services for Registered Investment Advisers). With over 200 lawyers across 11 offices nationwide, the firm provides both specialized legal services and integrated client teams combining multiple practice areas.

Differentiator

Problem solved

Functional benefit

Products and services

• Corporate Legal Services Comprehensive corporate legal representation spanning corporate law, securities, mergers and acquisitions, business formation, governance, and financing for corporations and emerging companies.
• Intellectual Property Services Full intellectual property services including patent prosecution and litigation, trademark, copyright, post-grant proceedings, and IP portfolio strategy for technology, biotech, and manufacturing clients. Delivered through 100+ IP professionals.
• Litigation Services Complex commercial litigation, class action litigation, asbestos litigation, product liability, white-collar criminal defense, and appellate representation delivered by 125+ experienced litigators across 11 offices.
• Employment and Labor Legal Services Employment and labor advisory, disputes, wage-and-hour, discrimination, and HR-related regulatory representation for employers across all industries.
• Data Innovation, Security and Privacy Legal Services Legal services addressing data security, privacy regulations including GDPR and CCPA, cybersecurity compliance, breach response, and data governance for corporate clients.
• E-Discovery Services Electronic discovery services supporting litigation, including document review, evidence management, and litigation readiness for complex matters.
• Artificial Intelligence Legal Services Legal advisory and representation addressing AI-related regulatory, transactional, and litigation matters for technology and defense-sector clients.
• AT Government Strategies, LLC (ATGS) Government relations and strategic counsel subsidiary; bipartisan team of lawyers, lobbyists, and political consultants shaping public policy, legislation, and regulations at federal, state, and local levels.
• ATGS Adviser Compliance Dedicated compliance services for independent Registered Investment Advisers (RIAs), handling routine compliance issues and providing support for sensitive regulatory matters.

Quantifiable outcome

• 120 lawyers named to Best Lawyers in America 2026 — approximately 60% of the firm's 200-lawyer headcount
• +3 more outcomes

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Five partnerships are on record, tiered core and minor.

• ATGS Adviser CompliancecoreStrategic or Co-development PartnerATGS Adviser Compliance offers dedicated compliance services to independent Registered Investment Advisers (RIAs), handling routine compliance issues and providing support for sensitive regulatory matters. Contact: Lori Neidel or Matt Kitzi.
• Alliuris Group (Alliance of International Business Lawyers)coreStrategic or Co-development PartnerArmstrong Teasdale is a member of Alliuris Group, a global network of law firms with offices in 36 cities around the world. Alliuris members are independent law firms with particular focus on European and international law. Partnership provides clients assurance of comprehensive cross-border case support.
• United States Law Firm GroupminorStrategic or Co-development PartnerAs a member of United States Law Firm Group with 6,000 lawyers practicing in 19 firms, Armstrong Teasdale can refer clients to firms across the country that meet specific geographic requirements.
• State Law Resources, Inc. (SLR)minorStrategic or Co-development PartnerArmstrong Teasdale is the Missouri member of State Law Resources, Inc., a national network of 46 independent law firms with unique experience in administrative, regulatory, and government relations at state and federal levels. Partner Sherry L. Doctorian previously served as chair of the SLR board.
• Cousins Allied Strategic Advisors, LLC (CASA)minorStrategic or Co-development PartnerCASA provides high-level strategic advice to companies doing business across the country. Contact: President and CEO Steven Cousins. Steve Cousins was the firm's first African-American partner (joined 1987, retired 2018).

Scale indicators17 records

Recent moves18 records

Expansion highlights5 records

Broad incumbents

• McGuireWoods LLP: Larger Am Law full-service firm with strong litigation, M&A, and regulatory practices competing with Armstrong Teasdale on enterprise and government-facing engagements nationally.
• Hogan Lovells US LLP: Global Am Law top-tier firm with deep IP, regulatory, and litigation practices that competes with Armstrong Teasdale in patent prosecution, trademarks, and complex corporate matters, especially through Alliuris-referred cross-border deals.

Direct peers

• Lathrop GPM LLP: Mid-sized full-service firm with comparable practice breadth and a Midwest-plus-Denver footprint, competing for similar enterprise and mid-market transactional and litigation mandates.
• Spencer Fane LLP: Full-service firm with comparable size and a similarly Midwest-anchored but nationally distributed footprint, offering corporate, litigation, IP, and government services to overlapping client segments.
• Bryan Cave Leighton Paisner LLP: Cross-Atlantic full-service firm sharing St. Louis origins with Armstrong Teasdale and competing directly for corporate, real estate, IP, and litigation work with a larger international footprint.
• Faegre Drinker Biddle & Reath LLP: Full-service firm of comparable scale with overlapping corporate, IP, litigation, and regulatory capabilities, formed through a 2020 merger mirroring Armstrong Teasdale's growth-by-combination strategy.
• Husch Blackwell LLP: Kansas City-based full-service firm of similar scale, competing for the same corporate, energy, real estate, and litigation mandates across the Midwest and Mountain West.
• Thompson Coburn LLP: St. Louis-headquartered full-service law firm of comparable size, similarly serving enterprise and mid-market clients across corporate, litigation, IP, and regulatory matters. Direct competitor for talent and clients in the Midwest.
• Polsinelli PC: Am Law 200 full-service firm with Kansas City roots and similar breadth across corporate, litigation, IP, and healthcare regulatory work. Closest comparable by headcount, geography, and practice-mix structure.
• Stinson LLP: Am Law-tier full-service firm with comparable headcount and similar corporate, finance, litigation, and government contracts practices. Overlaps significantly in commercial litigation and financial services representation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/at_law
• Facebookfacebook.com/armstrongteasdalellp
• LinkedInlinkedin.com/company/armstrongteasdale

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A3 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Armstrong Teasdale