Arnold & Porter
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Leading firm in USA 2026
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- Global Practice Guides
Overview
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With over 1,000 lawyers in 16 offices, Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues. We offer an integrated approach spanning more than 40 practice areas. Through multidisciplinary collaboration and focused industry experience, we provide innovative and effective solutions to mitigate risks, address challenges, and achieve successful outcomes.
Work & experience
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Arnold & Porter’s U.S. practice advises clients across a broad range of litigation, regulatory, enforcement, and corporate transactional matters. The firm assists clients in navigating complex legal, policy, and business challenges across industries in the U.S. and globally. Core strengths include Antitrust/Competition, Appellate, Bankruptcy, Commercial Litigation, Corporate & Finance, Intellectual Property, Life Sciences, Labor & Employment, Product Liability, and White Collar Defense.
Ranked Offices
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USA - Head office
District of Columbia
601 Massachusetts Avenue, NW , Washington, DC, District of Columbia, USA, 20001-3743, Washington, DC
UK
Greater London
Tower 42, 25 Old Broad Street , London, Greater London, UK, EC2N 1HQ, London
USA
Massachusetts
500 Boylston Street 20th Floor , Boston, Massachusetts, USA, 02116, Boston
Illinois
70 West Madison Street, Suite 4200, Chicago, Illinois, USA, IL 60602-4231, Chicago
Colorado
1144 Fifteenth Street Suite 3100 , Denver, Colorado, USA, CO 80202-2848, Denver
Texas
811 Main Street, Suite 1800 , Houston, Texas, USA, TX 77002-2755, Houston
California
777 South Figueroa Street 44th Floor , Los Angeles, California, USA, CA 90017-5844, Los Angeles
New York
250 West 55th Street , New York, New York, USA, NY 10019-9710, New York
New Jersey
One Gateway Center, Suite 1025, Newark, New Jersey, USA, NJ 07102, Newark
California
3000 El Camino Real, Five Palo Alto Square, Suite 500, Palo Alto, California, USA, Palo Alto
California
4 Embarcadero Center, 14th Floor , San Francisco, California, USA, 94111, San Francisco
Washington
Seattle, Washington, USA, Seattle
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Contributions
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Arnold & Porter
Top figures
16
Offices
1,000
Employees
1946
Established in
Key people
Capabilities
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