Guillaume Buell

Of Counsel


Guillaume Buell is Of Counsel to Labaton Sucharow LLP.  His practice focuses on representing investors and consumers in securities and consumer lawsuits pending in state and federal courts across the country.  Guillaume’s clients include a diverse array of institutional investors and high net worth individual investors in both the United States and throughout the world. 
Guillaume has been recognized as a "Rising Star" in securities litigation by Super Lawyers, a Thomson Reuters publication.
Guillaume is a Partner of Thornton Law Firm.  Prior to joining the firm, Guillaume was an Associate at Labaton Sucharow in New York, where he handled a wide range of securities class actions.  Guillaume was also previously an attorney with Hicks Davis Wynn, P.C. in Houston and Cahill Gordon & Reindel LLP in New York.  During his lengthy career, Guillaume has provided legal counsel to a wide range of Fortune 500 and other corporate clients in the aviation, construction, energy, financial, consumer, pharmaceutical, and insurance sectors in state and federal litigations, government investigations, and internal investigations.
Guillaume is an active member of the National Association of Public Pension Attorneys, the Canadian Pension & Benefits Institute, the Michigan Association of Public Employee Retirement Systems, the National Association of Shareholder and Consumer Attorneys, and the Georgia Association of Public Pension Trustees.
Guillaume received his Juris Doctor from Boston College Law School and was the recipient of the Boston College Law School Award for outstanding contributions to the law school community.  He was also a member of the National Environmental Law Moot Court Team, which advanced to the national quarterfinals and received best oralists recognition.  While in law school, Guillaume was a Judicial Intern with the Honorable Loretta A. Preska, United States District Court for the Southern District of New York, and an Intern with the Government Bureau of the Attorney General of Massachusetts.  He received his Bachelor of Arts, cum laude with departmental honors, from Brandeis University.
Guillaume is fluent in French.


New York

U.S. Court of Appeals

First Circuit 
Second Circuit 
Ninth Circuit 

U.S. District Court

District of Massachusetts
Southern District of New York
Eastern District of New York
Eastern District of Texas
Northern District of Texas
Southern District of Texas
Western District of Texas
District of Colorado

Supreme Court of the United States