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Innovative. Integrated. Industry-Focused.

World-class regulatory, litigation and transactional solutions for your most complex challenges.

Innovative. Integrated. Industry-Focused.

World-class regulatory, litigation and transactional solutions for your most complex challenges.

News October 24, 2025

The Legal 500 Latin America 2026 Recognizes Arnold & Porter Lawyers, Practices Learn more

News Corporate & Finance October 24, 2025

Chambers Brazil 2025 Again Recognizes Arnold & Porter’s Banking and Finance Capabilities Learn more

News Corporate & Finance October 31, 2025

Arnold & Porter Advises Microsoft on Next Chapter of OpenAI Partnership Learn more

News Financial Services October 17, 2025

Arnold & Porter Advises First Citizens Bank in Acquisition of 138 New Branches Learn More

Enforcement Edge: Shining Light on Government Enforcement White Collar Defense & Investigations October 30, 2025

U.S. Department of Commerce to Suspend Enforcement of the 50 Percent Rule for One Year Learn more

News Artificial Intelligence October 23, 2025

BTI Consulting Group Recognizes Arnold & Porter Among Top Litigation Firms in BTI Litigation Outlook 2026 Learn more

Presentation Antitrust/Competition November 12, 2025

Competition Bootcamp For In-House Life Sciences Lawyers Learn more and register

Video Series Inside Litigation

Watch our latest video series where our global litigation group shares brief insights on hot topics in complex litigation. Watch and learn more

Topic Administrative Law & Regulatory Litigation

The Second Trump Administration: Insights on New Executive Actions Learn more

Arnold & Porter by the Numbers

100K+

2024 Total Pro Bono Hours

Offices Worldwide

167

Chambers-Ranked Lawyers