LAWYER PROFILE
William Monahan

William Monahan

USA 2026

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Ranked in 1 practice area

About

Provided by Sullivan & Cromwell LLP

USA

Practice Areas

Litigation; Antitrust; Artificial Intelligence; Corporate Governance Litigation; Criminal Defense & Investigations; Crisis Management; Environmental Litigation; Environmental, Social and Governance (ESG); International Arbitration and Global Dispute Resolution; Media & Telecommunications; Products Liability & Mass Torts; Securities Litigation; Supreme Court and Appellate; Transportation

Career

Bill Monahan is Head of the Firm’s Product Liability & Mass Torts Group and a partner in the Firm’s Litigation Group. He focuses on “bet-the-company,” product liability/mass tort, securities, shareholder/corporate governance, complex commercial, employment, ESG, and M&A litigation, as well as related governmental and internal investigations. For almost 20 years, Bill has represented prominent corporations and individuals in their most challenging cases, including at jury and bench trials, before arbitration panels, and on appeal in federal and state courts across the United States. His corporate clients have included prominent automotive, pharmaceutical, healthcare, telecom, financial services, and computer companies.

Bill is currently spearheading the defense of Koninklijke Philips N.V. and its affiliates in its litigation across the globe relating to the June 2021 recall of certain CPAP, Bi-Level PAP, and mechanical ventilator devices, including consumer class actions, personal injury lawsuits, and shareholder litigation, as well as related regulatory inquiries.

Personal

University of Pennsylvania Law School, J.D., (2003); Cornell University, B.S., (1999); Mr. Monahan clerked for Magistrate Judge Gabriel W. Gorenstein, United States District Court, Southern District of New York, (2003-2004).

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Product Liability & Mass Torts - USA - Nationwide

Band 4
Band 4

Individual Editorial
William Monahan heads Sullivan & Cromwell's products liability and mass torts group. His sector expertise covers consumer class actions and personal injury claims.

Strengths

Provided by Chambers

  • William is a go-to lawyer. He is simply exceptional.

    Product Liability & Mass TortsChambers Guide to the USA

Ranked Individuals at Sullivan & Cromwell LLP (144)

California

California: Los Angeles & Surrounds

California: San Francisco, Silicon Valley & Surrou

District of Columbia

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