John P. DiTomo > Morris, Nichols, Arsht & Tunnell LLP > Wilmington, > Lawyer Profile

Morris, Nichols, Arsht & Tunnell LLP

Work Department

Corporate & Commercial Litigation


A partner at Morris Nichols, John’s practice includes representing investors, directors and officers, corporations, limited liability companies and general and limited partnerships in litigation concerning mergers and acquisitions and other complex commercial disputes.

John routinely defends corporate defendants against stockholder lawsuits and has significant experience with takeover litigation. 

He also routinely represents both individual and corporate clients who need to prosecute or defend corporate governance disputes including, for example, contests for board control, demands for appraisal or similar valuation disputes, demands for books and records, advancement and indemnification, requests for dissolution and receiverships, and a broad variety of other corporate governance disputes.  

John’s litigation practice is complimented by his advisory work and he also routinely advises boards of directors and special committees in internal investigations, and stockholder derivative demands.

For more, visit his bio at


John has extensive trial experience and has received the National Institute for Trial Advocacy, Advocate designation awarded to individuals who have devoted substantial time to trial practice continuing education. 

At the invitation of the Honorable Andre G. Bouchard, Chancellor of the Delaware Court of Chancery, John serves on the Delaware Court of Chancery Rules committee, a body charged with regularly reviewing the Court’s rules and practices and working with the Court to ensure that the Court’s rules and practices remain optimal. He also frequently writes and speaks on emerging issues in corporation law both nationally and internationally. Most recently he partnered with the Honorable Randy J. Holland, Justice of the Delaware Supreme Court, and the Taiwan Corporate Governance Association in a project to develop an international corporate law database that will serve as a resource for judges assigned to Taiwan’s newly developed business court. 

In 2015, John was invited to deliver the key note address at the Taiwan Corporate Governance Association’s 2015 International Summit on Corporate Governance, a two-day event focused on strengthening internal and external corporate governance mechanisms. The corporate governance summit was attended by members of Taiwan’s Securities and Futures Exchange, members of Taiwan’s Judicial and Legislative branches and a panel of international corporate governance experts and academics from various countries,including the United States, Japan, South Korea, Hong Kong, Singapore and Australia.


  • Delaware Board of Bar Examiners (appointed by Delaware Supreme Court, 2018-2020)
  • Delaware Court of Chancery Rules Committee
  • Delaware State Bar Association


  • J.D., 2004, University of Pennsylvania Law School
  • Associate, 2002-2003 and Research Editor, 2003-2004, University of Pennsylvania Journal of Constitutional Law
  • Certificate of Study in Business Economics and Public Policy, 2004, University of Pennsylvania
  • B.A., 1997, Richard Stockton College of New Jersey

Lawyer Rankings

United States > Dispute resolution > M&A litigation: defense

Morris, Nichols, Arsht & Tunnell LLP is widely regarded as one of the top Delaware firms and it frequently works alongside top-tier national defense firms on the most challenging and high-stakes cases in the market. ‘The partners and the team are world class – extremely skilled, diligent, and effective in every respect.‘ Practice heads Megan Ward Cascio and Kevin M. Coen lead a deep bench of experienced partners. Cascio and Kenneth J. Nachbar are ‘exceptional in every respect‘. William M. Lafferty is ‘an excellent courtroom lawyer with great instincts‘ and John DiTomo ‘exercises great judgment and is a fierce advocate‘. Thomas Briggs, who is known for his ‘patience and coolness under pressure‘, is active in heavyweight cross-border disputes, while Jon Abramczyk‘s recent case load includes matters in the health care arena.