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Guillaume Buell

Guillaume Buell

  • Securities Law, Consumer Law
  • Massachusetts, New York, Texas
Claimed Lawyer Profile

Guillaume Buell is Of Counsel to the Firm and principally litigates securities and consumer fraud class actions. Mr. Buell’s securities practice assists institutional investors and individuals in recovering their investment losses caused by violations of the state and federal securities laws. As co-chair of the Firm’s securities litigation practice, Mr. Buell is currently serving as co-Lead Counsel in the federal securities class action pending against Flex Ltd. in the United States District Court for the Northern District of California alleging violations of the Exchange Act of 1934. The Firm and Mr. Buell are also serving as counsel in a securities class action against Veeco Instruments, Inc. pending in California state court alleging violations of the Securities Act of 1933.

Before joining the Thornton Law Firm, Mr. Buell was a senior associate with primary responsibility for litigating a portfolio of securities fraud class actions for Labaton Sucharow in New York City. Before joining Labaton, he was a litigation associate at Cahill Gordon & Reindel LLP, where he represented major corporations and their officers and directors in the financial, consumer, pharmaceutical, and insurance sectors in commercial and securities litigations and consumer class actions in state and federal courts, state and federal government investigations, and internal investigations.

Mr. Buell Mr. Buell is admitted to practice in Massachusetts, New York, and Texas, the United States Courts of Appeals for the 1st and 2nd Circuits, and the United States District Courts for the District of Massachusetts, the Southern and Eastern Districts of New York, and the Eastern, Northern, Southern, and Western Districts of Texas.

Practice Areas
  • Securities Law
  • Consumer Law
  • Free Consultation
  • Contingent Fees
Jurisdictions Admitted to Practice
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New York
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1st Circuit
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2nd Circuit
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  • English: Spoken, Written
  • French: Spoken, Written
Professional Experience
Senior Associate
Labaton Sucharow LLP
Cahill Gordon & Reindel LLP
Boston College Law School
J.D. (2009) | Law
Honors: Recipient of Graduate Student Association 2009 Law School Award
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Brandeis University
B.A. (2006)
Honors: cum laude, with departmental honors
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Rising Star
Super Lawyers
Top Rated Securities Litigation Attorney in Boston, MA
2009 Boston College Law School Award
Boston College Law School
Professional Associations
Massachusetts Bar Association
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State Bar of Massachusetts  # 676566
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Websites & Blogs
Contact & Map
Thornton Law Firm LLP
One Lincoln Street
Boston, MA 02111
Telephone: (617) 720-1333