Kirby McInerney LLP | Financial Litigation Law Firm | Karen Lerner
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Karen  M. Lerner


Healthcare Fraud


  • The University at  Albany, SUNY (B.A., 1988, summa cum laude, Phi Beta Kappa)
  • University of Pennsylvania School of Law (J.D., 1991)


  • United States Supreme Court
  • U.S. Court of Appeals for the 2nd and 3rd Circuits
  • U.S. Court of Appeals for the District of Columbia
  • U.S. District Court for the Southern and Eastern Districts of New York
  • U.S. District Court for the District of New Jersey
  • New York State Bar
  • New Jersey State Bar
  • District of Columbia Bar
Karen M. Lerner
Tel: 212.371.6600
Fax: 212.751.2540
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Karen M. Lerner is a partner in our New York office focused on antitrust, commodities and healthcare litigation.

Ms. Lerner joined the firm in 2015.

Some of Ms. Lerner’s recent antitrust and Commodities Exchange Act work includes:
  • Special fiduciary representation for the exchange-based class in In re Foreign Exchange Benchmark Rates Antitrust Litigation for a putative class of participants who traded futures and options in the FX market.  The case has already resulted in partial settlements of more than $2.3 billion.
  • Representation of the exchange-based class in In re LIBOR-Based Financial Instruments Antitrust Litigation, an antitrust case alleging that defendant banks colluded to misreport and manipulate LIBOR.  This litigation has resulted in partial settlements totaling approximately $187 million, which collectively represent the largest historical class-wide recovery for a “futures only” settlement class.
  • Representation of exchange-based investors in Shak v. JP Morgan Chase & Co., alleging monopolization and manipulation of the silver futures market in violation of federal antitrust and commodity exchange laws.
  • Representation as counsel for plaintiff on behalf of gold purchasers in In re Commodity Exchange, Inc., Gold Futures and Options Trading Litigation, 14-md-02548 (S.D.N.Y.), a  market manipulation case.
  • Court appointed Executive commmittee member and class counsel in In re Cattle Antitrust Litigation, representing ranchers and live cattle traders alleging a conspiracy among the "Big 4" meatpacking firms to supress prices for fed cattle and commodities manipulation of live cattle futures traded on the Chicago Mercantile Exchange.
  • Counsel in the benchmark rate antitrust litigation Sullivan v. Barclays PLC on behalf of a putative class of investors who traded futures and options contracts on the NYSE LIFFE exchange against global financial institutions responsible for setting the Euro Interbank Offered Rate (“Euribor”).  The case has already resulted in partial settlements of more than $300 million.
  • Court appointed Discovery Committee Co-Chair in In re Effexor XR Antitrust Litigation for a putative class of direct purchasers of brand name and generic equivalents of extended release venlafaxine hydrochloride capsules against drug manufacturers.  Among the claims, Defendants are alleged to have delayed market entry of generic versions and entered into reverse payment settlements.
  • Representation as sole lead counsel in In re North Sea Brent Crude Oil Futures Litigation, No. 13-md-02475 (ALC) (S.D.N.Y.)
  • Representation of a whistleblower in State of New York v. Moody’s Corp., alleging millions of dollars of tax fraud using a sham captive insurance company for over a decade regarding domestic and international transactions.
Prior to joining KM, Ms. Lerner was of counsel at McDonough, Korn & Eichhorn, where she handled cases through trial involving professional liability, negligence, insurance coverage, and products liability. Ms. Lerner also advises individuals, corporations and non-profits regarding business practices and governance, and has served as a member of the Board of Directors for several charitable organizations.

Ms. Lerner is a frequent commentator on commodities, finance, and whistleblower matters. Representative articles include: