Guillaume Buell

  • Of Counsel at Thornton Law Firm LLP (20 Attorneys)
  • One Lincoln Street, 25th Floor, Boston, MA 02111
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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. He also practices in the firm’s consumer protection group, assisting consumers who have been ripped off by corporate wrongdoing. Mr. Buell has, in his career, advised leading pension funds and other institutional investors in the United States and Canada on issues related to corporate fraud in the U.S. securities markets. He has also advised foundations and endowment funds on monitoring the well-being of their investments. Mr. Buell has helped investors recover losses from securities fraud in courts throughout the country. He was part of the team that secured a $48 million recovery in the securities fraud action against the nation’s largest pharmacy retail chain, CVS Caremark. He also played an integral role in the $9 million recovery secured for investors against Vocera Communications, the leading provider of mobile communication solutions.

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 received his J.D. from Boston College Law School and was the recipient of the 2009 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, Mr. Buell was a judicial intern with the Honorable Loretta A. Preska, United States District Court for the Southern District of New York. He spent his third year of law school as an intern with the Government Bureau of the Attorney General of Massachusetts. He received his B.A., cum laude with departmental honors, from Brandeis University. He is an Eagle Scout and is fluent in French. Mr. Buell is admitted to practice in Massachusetts, New York, and Texas, the United States Courts of Appeals for the First and Second 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.

Areas of Practice (1)

  • Securities Litigation

Education & Credentials

Contact Information:
877-329-8531  Phone
(212) 883-7073  Fax
Year of First Admission:
2010, U.S. District Court, Eastern District of New York; 2013, U.S. District Court, Northern District of Texas; 2016, U.S. Court of Appeals, First Circuit; 2010, U.S. District Court, Southern District of New York; 2012, U.S. District Court, Eastern District of Texas; 2012, U.S. District Court, Southern District of Texas; 2014, U.S. Court of Appeals, Second Circuit; 2009, Massachusetts; 2010, New York; 2014, U.S. Supreme Court
Reported Cases:

Medoff v. CVS Caremark Corporation, et al., Case No. 09-cv-554-JNL-PAS (United States District Court, District of Rhode Island) ($48 million settlement reached against the nation’s largest pharmacy retail chain)

In re Vocera Communications, Inc. Securities Litigation, Master File No. 3:13-cv-03567 EMC (United States District Court, Northern District of California) ($9 million recovery secured for investors against a leading provider of mobile communication solutions)

In re Nu Skin Enterprises, Inc. Securities Litigation, Case No. 2:14-cv-00033-JNP-BCW (United States District Court, District of Utah) ($47 million settlement reached in securities class action involving Nu Skin’s business conduct in China)

In re Genworth Financial, Inc. Securities Litigation, Case No. 14-cv-2392 (AKH) (United States District Court, Southern District of New York) ($20 million settlement reached with provider of insurance and wealth management services)

In re Castlight Health, Inc. Shareholder Litigation, Lead Case No. CIV533203 (Superior Court of the State of California, County of San Mateo) ($9.5 million settlement with Castlight Inc, in a case alleging that the company’s IPO offering documents were false and misleading because they omitted material information, including significant obstacles and delays faced by customers during the implementation of Castlight’s technology, resulting in low customer renewal rates and negatively impacting the company’s gross margins)

Noppen v. Innerworkings, Inc., et al., Case No. 14-cv-1416 (United States District Court, Northern District of Illinois, Eastern Division) ($6.025 million settlement in case alleging misleading statements and omissions regarding accounting improprieties)

Hall v. Rent-A-Center, Inc., et al., No. 16-cv-0978 (United States District Court, Eastern District of Texas) (securities class action against Rent-A-Center, Inc., its former CEO Robert D. Davis, and former CFO Guy J. Constant alleging defendants made material misstatements and omissions in violation of the federal securities laws concerning, among other things, the risks and benefits of a new point-of-sale (POS) system that Rent-A-Center began implementing in early 2015)
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Boston, Massachusetts

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