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Paul Hastings LLP

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Kenneth Breen

Work 212-318-6344
Paul Hastings LLP

Work Department

Paul Hastings LLP / Litigation Department


Kenneth Breen is a Partner in the Litigation Department of Paul Hastings and co-coordinator of the firm’s Securities Regulatory Enforcement and White Collar Criminal Defense practice. Mr. Breen represents corporations and individuals in high-stakes regulatory enforcement and white collar criminal investigations and related proceedings. Mr. Breen also conducts internal investigations for companies and their boards and committees, and he handles civil litigation matters for a variety of clients. He has handled a wide array of regulatory enforcement and white collar criminal matters, including those involving allegations of insider trading, corporate and accounting fraud, securities fraud, False Claims Act violations, health care fraud, antitrust violations, tax fraud, Foreign Corrupt Practices Act violations and public corruption. He regularly represents clients in court and before the United States Department of Justice ("DOJ"), the Securities and Exchange Commission ("SEC"), the Commodity Futures Trading Commission ("CFTC"), the New York State Attorney General's Office ("NYAG"), FINRA and other self-regulatory organizations and federal and state agencies. As a defense attorney and former federal prosecutor, Mr. Breen has tried more than 40 cases to verdict, and he has argued on multiple occasions in the U.S. Court of Appeals for the Second Circuit.


U.S. Attorney’s Office for the Eastern District of New York, Assistant U.S. Attorney/Deputy Chief of Business and Securities Fraud Section (1999 - 2005); U.S. Department of Justice, Tax Division, Western Criminal Enforcement Section, Trial Attorney (1995 - 1999)


Mr. Breen is a member of the New York bar and is admitted to practice in the United States District Court for the Southern and Eastern Districts of New York and the U.S. Court of Appeals for the Second Circuit.


Mr. Breen received his B.A. in English, cum laude, from Boston College in 1989, and his J.D. from the Boston College School of Law in 1992, where he was Annotation Editor and Staff Writer for the Uniform Commercial Code Reporter Digest.

United States: Dispute resolution

Corporate investigations and white-collar criminal defense

Within: Corporate investigations and white-collar criminal defense

The 'talented lawyers' at Paul Hastings LLP stand out for their experience in dealing with complex international corporate investigations, and are particularly commended by clients for their teamwork under the 'impressive' stewardship of New York's Kenneth Breen. Alongside Phara Guberman and Jane Yoon, Breen is representing former supervisor of the money market desk at Deutsche Bank in a DOJ prosecution pending in the Southern District of New York relating to allegations of Libor manipulation. 'A most remarkable practitioner', Washington DC-based Robert Luskin (who 'combines the skills of a scholar and a street-wise fighter') is, alongside Kwame Manley, assisting SAP with a number of matters, including an internal investigation related to US sanctions in Iran. Having represented the client throughout its corruption investigation and resolution with the DOJ, Luskin and John Darden continue to represent Braskem through its monitorship. 'Smart, strategic and tireless' Michael Levy is also recommended in Washington DC.

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