Arnold & Porter

Firm Profile

Rankings

Global

Awarded leading firm in Global 2026

Chambers and Partners

Ranked Departments:

Chambers and Partners

Ranked Individuals:

Overview

Provided by Arnold & Porter

Co-Chairs: Michael D Daneker, Ellen Kaye Fleishhacker

Number of lawyers: Over 1,000 across 11 domestic and five international offices

Firm Overview: With over 1,000 lawyers across 16 offices worldwide, Arnold & Porter is renowned for its sophisticated regulatory, litigation, and transactional capabilities across multiple industries, including over half of the Fortune 100. Drawing on its deep experience and insider perspectives from both the government and the private sector, Arnold & Porter provides practical, forward-looking solutions to its clients’ most sophisticated U.S., international, and cross-border needs. Its firmwide interdisciplinary collaboration is integral to its understanding of the legal and policy frameworks in which complex business and legal issues arise.

Ranked Offices

Provided by Arnold & Porter

Address (A-Z)

USA - Head office

District of Columbia

601 Massachusetts Avenue, NW , Washington, DC, District of Columbia, USA, 20001-3743, Washington, DC

www.arnoldporter.com

+1 202 942 5000

Belgium

Brussels Capital Region

1, Rue du Marquis, Markiesstraat, 1, Brussels, Brussels Capital Region, Belgium, B-1000, Brussels

China

Shanghai

Suites 3806-3811, CITIC Square 1168 Nanjing Xi Rd , Shanghai, Shanghai, China, 200041, Shanghai

South Korea

Seoul

Seoul Finance Center, Floor 21, 136 Sejong-Daero, Jung-Gu, Seoul, Seoul, South Korea, 04520, Seoul

UK

Greater London

Tower 42, 25 Old Broad Street, London, Greater London, UK, EC2N 1HQ, London

USA

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


New York

250 West 55th Street , New York, New York, USA, NY 10019-9710, New York


California

Three Embarcadero Center, Seventh Floor, San Francisco, California, USA, CA 94111-4024, San Francisco

Chambers Laurel

Ranked Departments

Band
Chambers Laurel

Ranked Individuals

Band

Contributions

Latest contributions provided by Arnold & Porter

Global Practice Guide
Anthony Raglani
David F. Freeman, Jr
Michael A. Mancusi
Amber A. Hay
Authored by
Anthony Raglani, David F. Freeman, Jr, Michael A. Mancusi, Amber A. Hay
Article • Oct 2025
Global Practice Guide
Erik Walsh
James P. Bergin
Richard M. Alexander
Kevin M. Toomey
Authored by
Erik Walsh, James P. Bergin, Richard M. Alexander, Kevin M. Toomey
Article • Oct 2025
Global Practice Guide
Daniel Kracov
David Marsh
Alice Ho
Authored by
Daniel Kracov, David Marsh, Alice Ho
Article • Mar 2025

All contributions provided by Arnold & Porter

Sort by - Most recent
Title and authorsContent typePublication dateMedia type
Life Sciences 2025 | UK | Law and Practice
Authored by: Adela Williams, Ewan Townsend, Jackie Mulryne, Libby Amos-Stone
Global Practice Guide Mar 2025 Article

Arnold & Porter