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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 Financial Technology December 8, 2025

Chambers Recognizes Arnold & Porter as a Leading FinTech Firm Learn more

News Life Sciences Transactions December 1, 2025

Arnold & Porter Grows Life Sciences Transactional Bench with George Jenkins in London Learn More

News Corporate & Finance December 9, 2025

Latinvex Recognizes Valentina Garzon in 2026 ‘Latin America’s Rising Legal Stars’ List Learn more

News Corporate & Finance December 4, 2025

Arnold & Porter Advises Brazil on Two Bond Issuances Totaling US$2.25 Billion Learn More

News Antitrust/Competition December 4, 2025

Global Competition Review Recognizes Arnold & Porter in 2026 ‘Foreign Investment Control’ Guide 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

Webinar White Collar Defense & Investigations December 11, 2025

Close the Year Out With Qui Notes False Claims Act FY25 Year in Review and an Early Look at FY26 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