New York University School of Law
JD, MA, 1989

Editor in Chief, New York University Law Review

St. Lawrence University
BA, 1984, Valedictorian, summa cum laude, Fulbright French Government Teaching Assistant



New York

US District Court, Massachusetts

US Court of Appeals, First & Third Circuits


Honorable Amalya L. Kearse, US Court of Appeals, Second Circuit

Publications & Events

Chambers USA 2017 Recognizes Choate Lawyers and Practices

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 30 Attorneys

Diana Lloyd and Sara Frank on Crime-Fraud Exceptions

Choate Has 52 Attorneys Selected for 2016 Best Lawyers in America

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 27 Attorneys

Diana Lloyd and Kevin Ma on Anti-Shredding Fish Ruling

Diana Lloyd and Kevin Ma on Improper "Anti-Shredding" Conviction

Diana Lloyd and Kevin Ma on Obstructing an Investigation

Diana Lloyd on Becoming a Whistleblower

Diana Lloyd on the DOJ's New Stance on False Statements in Law360

Diana Lloyd and Jacqueline Mantica on Binding Corporate Plea Agreements in Law360

Diana Lloyd on the SEC's Admissions Policy in Law360

Diana Lloyd Speaks on Healthcare Fraud

Diana Lloyd Profiled in White Collar Law360

2012 Top Massachusetts Super Lawyers

Diana Lloyd, Michael Gass, Jack Cinquegrana and Stuart Glass on Whistleblower Trends in Law360

2013 Best Lawyers in America

Diana Lloyd Speaks on Recent SEC and DOJ Developments

Diana Lloyd Quoted on Dodd-Frank Clawback Rules in Mass Lawyers Weekly

Diana Lloyd and Rebecca Wilsker on Increased Enforcement of Executive Compensation Clawbacks in Law360

2011 Top Massachusetts Super Lawyers

Diana Lloyd Co-Moderates Program on Responding to Subpoenas and Search Warrants

Diana Lloyd on the SEC's New Whistle-Blower Rule

Jack Cinquegrana and Diana Lloyd on Executive Liability

2010 Top Massachusetts Super Lawyers

Diana Lloyd Speaks on What Board Members Need to Know

Diana Lloyd on Internal Investigations

Diana Lloyd and Husband Named Legal Power Couple

Choate Co-Sponsors Conference on Pharmaceutical Legal, Regulatory and Compliance Matters

Over one-third of Choate attorneys selected Massachusetts Super Lawyers 2009

First Settlement in New York Pay-to-Play Pension Cases is Likely to Change Placement Agent Practice

Diana Lloyd Speaks on Representing Corporate Clients Subject to Government Investigations

Jack Cinquegrana and Diana Lloyd on Off-Label Promotion in Pharmaceutical Executive

Diana K. Lloyd

Practice Group Leader

t 617-248-5163   f 617-248-4000

“is widely esteemed for her ability in the courtroom and is much admired for her governmental enforcement, internal investigation and securities-focused practice … a fabulous white-collar lawyer”

Chambers USA

Diana Lloyd is co-chair of the firm’s Government Enforcement & Compliance Practice Group.  She has over 25 years of experience in federal and state government enforcement matters, internal investigations and related business and securities litigation.  An experienced trial and appellate attorney, Ms. Lloyd has also had considerable success dissuading governmental agencies from pursuing any enforcement or criminal action against her clients.  As an Assistant US Attorney in Boston, she received numerous awards for excellence from the US Attorney and various federal law enforcement agencies.  Ms. Lloyd has been ranked among the top 50 women and top 100 Massachusetts Super Lawyers, has been recognized as a Massachusetts Super Lawyer since 2005 and is listed in Chambers USA and Best Lawyers in America.  She has been selected for inclusion in The International Who’s Who of Business Crime Lawyers each year since 2010.

Practice Focus

Government Enforcement & Compliance:  extensive experience representing companies and individuals subjected to government investigations and prosecutions or in need of representation in connection with internal corporate investigations.  

Complex Financial Litigation & Securities Litigation:  handle private and SEC securities litigation, represent individuals and corporate clients before the SEC and FINRA.

Previous Experience

Prosecutorial:  Assistant US Attorney, Boston in Major Crimes and Economic Crimes Units; Special Assistant District Attorney, Suffolk County District Attorney's Office.

Private Practice:  Sullivan & Cromwell, New York; Skadden, Arps, Slate, Meagher & Flom, Boston. 

Representative Engagements

  • Defense of corporations, investment advisers and individuals in securities-related investigations, including whistleblower investigations, involving variety of civil and potentially criminal allegations.
  • Representation of major pharmaceutical companies in federal investigations into sales and marketing practices.
  • Representation of educational institutions in internal investigations and government investigations.
  • Representation of healthcare-related entities in government investigations.
  • Provide FCPA advice to entities in connection with internal and government investigations.
  • Representation of medical device company in qui tam whistleblower investigation.
  • Obtained reversal of federal criminal conviction for multi-year conspiracy involved alleged environmental fraud.
  • Successful representation of individuals and entities investigated in federal public corruption investigations.
  • Special Counsel to the Massachusetts Supreme Judicial Court, for the purpose of conducting an independent inquiry regarding the Massachusetts District Courts and the Boston Municipal Court.
  • Defense of former executive of major medical device manufacturer who was acquitted of conspiracy to defraud the US after a lengthy trial.
  • Representation of senior executives accused of sophisticated financial fraud.
  • Successful representation of numerous individuals in federal healthcare fraud investigations.

Publications and Presentations

Professional and Community Involvement

Ms. Lloyd serves as President-Elect of the Boston Bar Foundation and is also a member of its Executive Committee.  She is a prior member of the Boston Bar Association Council and Executive Committee.  Ms. Lloyd served as co-chair of the Steering Committee for the Criminal Section of the Boston Bar Association from 2008-2010 and has also served on the Board of Trustees of the Women’s Bar Foundation.  For six years, Ms. Lloyd was a member of the Federal Criminal Justice Act panel, accepting court appointments to represent indigent defendants in federal criminal cases. She is a Trustee of Gann Academy, is active in Combined Jewish Philanthropies, and previously served on various committees for the South Area Solomon Schechter Day School.  She has taught in the Citizen Schools Trial Advocacy Program, an after-school enrichment program for Boston public school students.  Ms. Lloyd is co-chair of Choate's Hiring Committee, a current member of its Diversity & Inclusion Committee and a former member of the firm's Executive and Associates Committees.


Thank you for reaching out to contact Choate. Before you send your message, we wanted to make sure you are aware of the following. Please do not send any confidential information in response to this link. Sending an e-mail to Choate does not give rise to an attorney-client relationship, and will not be deemed to disqualify Choate from undertaking any engagement for a current or future client.  Before any attorney-client engagement may be formed, Choate will need to check for possible conflicts of interest, you will need to consider whether you wish to retain Choate as counsel, and we will need to consider whether we wish to accept the potential engagement. In the meantime, Choate reserves the right to represent parties with interests adverse to you.