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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 Investment Management May 8, 2026

Aron Estaver Returns to Arnold & Porter as Investment Management Partner in San Francisco Learn More

News Antitrust/Competition Litigation May 5, 2026

Arnold & Porter Expands European Antitrust Litigation Team with Addition of Partner Nicola Chesaites Learn More

News May 8, 2026

San Francisco Business Times Recognizes Ellen Kaye Fleishhacker as a Most Influential Woman in Bay Area Business Learn More

Featured Topic

The GENIUS Act and Stablecoin Regulation Resource Center Understand The Future Of Digital Currency Policy — Learn More

Presentation Global Life Sciences June 16, 2026

Part I: Biotech Deals — Creating Optimal Licensing and Partnering Arrangements Learn More and Register

News Corporate & Finance May 4, 2026

Arnold & Porter Advises Brazil on Landmark €5B Global Bond Offering, Largest Ever and First Euro Issuance Since 2014 Learn More

News Emerging Companies & Venture Capital May 5, 2026

Arnold & Porter Advises D. E. Shaw Ventures on OpenAI, Anthropic Investments Learn More

News Life Sciences & Healthcare Regulatory May 7, 2026

Food and Drug Law Institute Recognizes Elizabeth Trentacost as a Rising Star Learn More

Featured Topic

Middle East Crisis: Navigating the Conflict with Iran Learn More About Our Strategic Advisory and Counsel Services

Further Reading

Arnold & Porter by the Numbers

107K+

2025 Total Pro Bono Hours

16

Offices Worldwide

164

Chambers-Ranked Lawyers