Karen L. Eisenstadt | White & Case LLP International Law Firm, Global Law Practice

Karen L. Eisenstadt

Associate, Boston

T +1 617 979 9327

E [email protected]


Karen Eisenstadt focuses her practice on white-collar and securities defense and complex commercial litigation.

Karen regularly represents clients in U.S. criminal and civil regulatory matters, and complex, multi-jurisdictional disputes. Karen has significant experience advising health care companies with respect to government investigations, qui tam actions, and consumer protection lawsuits. She was also a member of the successful trial team in the criminal antitrust prosecution, United States v. Usher et al.

Karen previously served as a law clerk to the Honorable Sandra S. Ikuta of the US Court of Appeals for the Ninth Circuit. While in law school, Karen was an executive editor of the Harvard Law Review and a semi-finalist in the Ames Moot Court Competition.

Bars and Courts

  • Massachusetts State Bar
  • US Court of Appeals for the Second Circuit
  • US Court of Appeals for the Fifth Circuit
  • US District Court for the District of Massachusetts


  • JD, Harvard Law School
  • AB, Harvard College


  • English


Developed legal strategy and drafted motions and proposed jury charge as member of trial team that secured a jury acquittal for UK national in the criminal antitrust prosecution, United States v. Usher et al. (SDNY 2018).

Representation of a global life sciences company in DOJ and SEC investigations of FCPA and revenue recognition issues.  DOJ declined prosecution and SEC settled on terms favorable to client.

Drafted successful motion to dismiss for global food manufacturer in putative class action filed under Massachusetts consumer protection laws.

Drafted successful motion to dismiss for biotech company in qui tam action concerning eligibility for Medicare reimbursement.*

Defended a former hedge fund manager on criminal insider trading charges. The jury acquitted on all counts.*

Represented an international manufacturer in the DOJ Antitrust Division's auto parts price-fixing investigations,* and related civil disputes.

Drafted successful Second Circuit brief affirming a motion to dismiss in a consumer protection class action.*

Member of trial team that secured a jury verdict of invalidity and non-infringement in biotech patent case.*

Member of pro bono trial team that overturned the murder conviction of a Rhode Island state inmate; drafted successful brief to the Rhode Island Supreme Court to uphold grant of post-conviction relief.

Matters prior to joining White & Case.


  • The Crime Fraud Exception in the Wake of Gorski et al., Mass. Lawyers Weekly, (Dec. 4, 2014) , (co-author)