Buell web landscape 300x200 300dpi

address: 140 Broadway
New York, NY 10005

Practice Areas

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. 
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. He is an Eagle Scout and actively involved in his hometown's local civic organizations.


2009, Massachusetts
2010, New York
2012, Texas

2014, Supreme Court of the United States

U.S. Court of Appeals
2016, First Circuit
2013, Second Circuit
2020, Ninth Circuit

U.S. District Court
2015, District of Massachusetts
2010, Southern District of New York
2010, Eastern District of New York
2012, Eastern District of Texas
2013, Northern District of Texas
2012, Southern District of Texas
2018, Western District of Texas
2018, District of Colorado