Martin S. Lessner

p 302.571.6698
f 302.576.3309

Marty Lessner practices in the areas of corporate and commercial litigation, mainly in the Delaware Court of Chancery and Delaware Supreme Court. He has tried and won various complex multi-million dollar cases including corporate stock appraisal, breach of fiduciary duties, expedited mergers and acquisitions disputes, fraud, breach of contract, and books and records. Some of the major cases he has litigated include BVF Partners L.P. v. New Orleans Emples. Ret. Sys. (In re Celera Corp. S'holder Litig.), 59 A.3d 418 (Del. 2012), Montgomery Cellular Holding Co. v. Dobler, 880 A.2d 206 (Del. 2005), Rosenbloom v. Esso V.I., Inc., 766 A.2d 451 (Del. 2000), M.G. Bancorporation v. Le Beau, 737 A.2d 513 (Del. 1999), Dweck v. Nasser, 80 A.3d 959 (Del. 2013), Mannix v. Plasmanet, Inc., 2015 Del. Ch. LEXIS 190; Teamsters Union 25 v. Baiera, Travelport, Orbitz, et al, 119 A.3d 44 (Del. Ch. 2015); WSFS v. Caesars Entertainment Corp., 2015 Del. Ch. LEXIS 62; Nichols v. Markell, 2014 U.S. Dist. LEXIS 52976; Yucaipa v. SBDRE LLC, 2014 Del. Ch. LEXIS 222; ACP Master Ltd vs Sprint Nextel Corp, CA No. 8508-VCL (2014); Aviva Life & Annuity Co. v. Am. Gen. Life Ins. Co., 2014 Del. Ch. LEXIS 60; In re Inc. Shareholder Litigation, Consol. C.A. No. 7988-CS (December 17, 2012), In re Smurfit-Stone Container Corp. S'holder Litig., 2011 Del. Ch. LEXIS 79 (Del. Ch. May 20, 2011), Yucaipa Am. Alliance Fund II, L.P. v. Riggio, 1 A.3d 310 (Del. Ch. 2010), In re Countrywide Corp. S'holders Litig., 2009 Del. Ch. LEXIS 44 (Del. Ch. Mar. 31, 2009), Marie Raymond Revocable Trust v. Mat Five LLC, 980 A.2d 388 (Del. Ch. 2008), Highfields Capital, Ltd. v. AXA Fin., Inc., 939 A.2d 34 (Del. Ch. 2007); W.L. Gore & Assocs. v. Wu, 2006 Del. Ch. LEXIS 176 (Del. Ch. Sept. 15, 2006), Kronenberg v. Katz, 872 A.2d 568 (Del. Ch. 2004), In re MONY Group Inc. S'holder Litig., 853 A.2d 661 (Del. Ch. 2004), Steinman v. Levine, 2002 Del. Ch. LEXIS 132 (Del. Ch. Nov. 27, 2002), In re Pure Res. S'Holders Litig., 808 A.2d 421 (Del. Ch. 2002), RGC Int'l Investors, LDC v. Greka Energy Corp., 2001 Del. Ch. LEXIS 107 (Del. Ch. Aug. 22, 2001), Continental Ins. Co. v. Rutledge & Co., 750 A.2d 1219 (Del. Ch. 2000), and Cantera v. Marriott Senior Living Servs., Inc., 1999 Del. Ch. LEXIS 26 (Del. Ch. Feb. 18, 1999).

Marty is the Chair of Young Conaway's Corporate Counseling and Litigation Section.  He is included in The Best Lawyers in America®, Commercial Litigation. Marty has been invited to speak on issues of Delaware corporate law and Court of Chancery procedure at Harvard Law School, Columbia Law School, and various other forums and panels.

Marty graduated cum laude from the Wharton School of the University of Pennsylvania in 1985. He graduated cum laude from Villanova University School of Law in 1992, where he was the winner of the annual Villanova Moot Court competition and winner of the Herman J. Obert Award for the graduating student attaining the highest grade in Corporation law. Upon graduation from law school, Marty served as the law clerk to the Honorable Carolyn Berger, Vice Chancellor, Court of Chancery of the State of Delaware for the 1992-1993 term. 


  • Chambers USA - America's Leading Lawyers for Business, Chancery, 2013-Present
  • The Best Lawyers in America®, Commercial Litigation, Corporate Law, Litigation - Mergers and Acquisitions, 2009 - Present

Memberships and Affiliations

  • American Bar Association
  • Delaware State Bar Association, Member, Corporate Law, Business Law and Litigation Sections 
  • Rodney Inn of Court, Master
  • Court of Chancery Rules Committee (appointed by Chancellor Andre G. Bouchard to committee composed of highly experienced lawyers who litigate frequently in the Court of Chancery)
  • Board of Advisors of the University of Pennsylvania Institute for Law and Economics, Member  
  • Council on Transportation, Appointed by Governor Jack A. Markell as one of the nine members of the statutory panel that advises and approves the Delaware Department of Transportation’s priorities, annual Capital Improvement Program, highway realignments, and certificates to public carriers.
  • Jewish Community Center of Delaware, President (2012-2014), Board of Directors, Executive Committee 
  • Lincoln Club of Delaware, President (2011-2012), Board of Directors
  • Delaware Greenways, Board of Directors
  • Naamans Little League, Legal Advisor