Skip to main content

Innovative. Integrated. Industry-Focused.

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

  • Regulatory

    Sector-specific expertise to support virtually every aspect of your regulated business activities.

  • Litigation

    Combining creative litigation strategies with business practicality to resolve high-stakes disputes.

  • Transactional

    Trusted advisors for our clients' most complex transactions.

Innovative. Integrated. Industry-Focused.

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

  • Regulatory

    Sector-specific expertise to support virtually every aspect of your regulated business activities.

  • Litigation

    Combining creative litigation strategies with business practicality to resolve high-stakes disputes.

  • Transactional

    Trusted advisors for our clients' most complex transactions.

News International Arbitration January 9, 2026

Arnold & Porter Secures Resolution of Investment Treaty Arbitration for the Kingdom of Thailand Learn more

News Real Estate January 6, 2026

Arnold & Porter Continues West Coast Growth, Adds Real Estate Partner Katherine Wax and Counsel Katie McHenry Learn More

Media Mention Appellate & Supreme Court January 7, 2026

Arnold & Porter Lawyers Featured in Law360 2025 Recap and 2026 Outlook Coverage Learn more

Advocacy and Policy Legislative & Public Policy January 7, 2026

Congressional Kickoff Learn More

News Legislative & Public Policy December 16, 2025

The Hill Names Eugenia Pierson and Kevin O’Neill to ‘Top Lobbyists 2025’ List Learn more

Blog Administrative Law & Regulatory Litigation Major Questions

Read our latest blog series for insights on federal and state administrative law, including agency rulemaking, executive orders, litigation, and compliance Learn more

Seminar/Conference Global Life Sciences January 28, 2026

Arnold & Porter’s 2026 Life Sciences Future Forum 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

Further Reading

Arnold & Porter by the Numbers

100K+

2024 Total Pro Bono Hours

16

Offices Worldwide

166

Chambers-Ranked Lawyers