Strategic Research Sponsor of the American Bar Association's Section of International Law

William F Cavanaugh

William F Cavanaugh
1133 Avenue of the Americas
New York
New York
+1 212 336 2793
+1 212 336 2394


Who's Who Legal Competition: Lawyers

William F Cavanaugh, Jr is a senior litigation partner and served as co-chair of Patterson Belknap Webb & Tyler LLP from 2007 to 2017. His areas of concentration include antitrust, intellectual property and commercial litigation. Mr Cavanaugh also served in 2009–2010 as deputy assistant attorney general of the United States for civil enforcement in the antitrust division of the Department of Justice.

A skilled trial attorney with extensive experience in both state and federal courts as well as in arbitration, Mr Cavanaugh has served as national and trial counsel in several large multiparty antitrust, fraud and consumer protection litigations in federal and state courts across the US brought by private plaintiffs and state attorneys general. His clients include major pharmaceutical, medical device, food and beverage, and financial services companies.

Recently, Mr Cavanaugh secured summary judgment for a chocolate maker in an antitrust price-fixing case, which was affirmed by the Third Circuit. He also defended a major pharmaceutical company in federal multidistrict class and individual actions, and state class actions, arising from allegedly anti-competitive pricing in the brand name prescription pharmaceutical market. The district court granted summary judgment and the Second Circuit affirmed the decision. He is currently representing financial institutions in antitrust matters involving credit cards, ATM fees and certain financial instruments as well as manufacturers of contact lenses and blood reagents.

Mr Cavanaugh frequently speaks on antitrust topics and writes on antitrust issues. He is a founding contributor to Mr Cavanaugh received his JD from St John's University School of Law and his BS, magna cum laude, from St John’s University. He is a fellow of the American College of Trial Lawyers. 

WWL says: William Cavanaugh is an "amazing" antitrust litigator noted for his exceptional advocacy work before federal and state tribunals.

This biography is an extract from Who's Who Legal: Competition which can be purchased from our Shop.

Other Practice Areas:

Follow us on LinkedIn

Practice Areas


Browse Firms

Search Firms

The Who's Who Legal 100


News & Features

Special Reports



About Us

It is not possible to buy entry into any Who's Who Legal publication

Nominees have been selected based upon comprehensive, independent survey work with both general counsel and private practice lawyers worldwide. Only specialists who have met independent international research criteria are listed.

Copyright © 2018 Law Business Research Ltd. All rights reserved. |

87 Lancaster Road, London, W11 1QQ, UK | Tel: +44 20 7908 1180 / Fax: +44 207 229 6910 |

Law Business Research Ltd

87 Lancaster Road, London
W11 1QQ, UK