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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 November 12, 2025

New York City Bar Association Honors Sheila Boston with Historic Portrait Unveiling Learn More

News Antitrust/Competition November 12, 2025

Benchmark Litigation US 2026 Recognizes 26 Lawyers and Ranks Six Practices Learn more

News November 12, 2025

Essex County Bar Association Presents Judge Greenaway with ‘Lifetime Achievement’ Award Learn more

News International Arbitration November 5, 2025

Arnold & Porter Achieves Arbitration Win with Panama Canal Expansion Award Learn More

News Corporate & Finance November 10, 2025

Arnold & Porter Advises CNL Healthcare Properties in $1.8B Merger Learn more

News Antitrust/Competition November 10, 2025

‘Best Law Firms’ 2026 Names Arnold & Porter ‘Law Firm of the Year’ for Litigation - Antitrust; Ranks 34 National Practices and 83 Metro Practices Learn more

Webinar Life Sciences & Healthcare Regulatory November 20, 2025

Critical Medical Device Series: Part X Balancing Risk and Innovation: Fraud and Abuse Trends for MedTech 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