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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 Services Transactions January 30, 2026

LatinFinance Recognizes Arnold & Porter for Advising Republic of Colombia and Republic of El Salvador Learn More

News Tax January 27, 2026

Washingtonian Names Cara Koss and Thomas Richardson to 2026 ‘Top Financial Adviser’ List Learn more

News Appellate & Supreme Court January 28, 2026

Arnold & Porter Secures Unanimous Supreme Court Victory in Berk v. Choy Learn more

Inside Litigation Commercial Litigation January 22, 2026

Patent Protection in a Borderless World Learn More

Media Mention Global Life Sciences January 27, 2026

Dan Kracov, Derek Stoldt Discuss Life Sciences Deal Trends at the 2026 J.P. Morgan Healthcare Conference Learn more

Advocacy and Policy Legislative & Public Policy January 7, 2026

Congressional Kickoff Learn More

Seminar/Conference Global Life Sciences March 3, 2026

New Date: Arnold & Porter’s 2026 Life Sciences Future Forum Learn more and register

Advisory Life Sciences & Healthcare Regulatory January 21, 2026

FDA “Cuts Red Tape” on Clinical Decision Support Software and Wearable Products for General Wellness 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

Further Reading

Arnold & Porter by the Numbers

107K+

2025 Total Pro Bono Hours

16

Offices Worldwide

166

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