Michael A. Weidinger

Mr. Weidinger focuses his practice on fiduciary and commercial litigation in Delaware. His primary work has been litigation in the Delaware Court of Chancery, although he has substantial experience in other Courts in Delaware and in alternative dispute resolution. He has been lead counsel in numerous trials in the Court of Chancery and has argued multiple appeals in the Delaware Supreme Court. His work has included many appraisal and unfair dealing cases arising out of mergers and acquisitions, trust fiduciary litigation, limited liability company dissolution disputes, and class action litigation. He has litigated numerous trust fiduciary cases, been engaged in will contests, filed petitions for instructions, and sought the modification and/or termination of both charitable and non-charitable trusts. He has been appointed by the Court of Chancery as guardian ad litem in numerous trust disputes. He has been listed in Chambers USA for Court of Chancery practice.



  • Corporate & Alternative Entity Litigation
  • Contract Litigation
  • Dissolution Litigation
  • Appraisal and Valuation Litigation
  • Trust Fiduciary Litigation
  • Class Action Litigation
  • Trade Secrets/Noncompetition Litigation
  • Special Litigation Committee Work


  • Counseling Delaware entities and their officers, directors and owners in transactions, including mergers and acquisitions, sales of assets, dissolution and winding up of business affairs.
  • State of Delaware
  • U.S. District Court -- Delaware


  • Delaware State Bar Association
  • American Bar Association
  • Federal Bar Association


  • The George Washington University School of Law, J.D., with high honors, Order of the Coif, 1994.
  • Miami University, Oxford, Ohio, cum laude, 1983.

Representative Matters:

  • Schoon v. Troy, Chancery and Supreme, derivative action;
  • Oliver v. Boston University, Chancery, class action breach of fiduciary duty claims;
  • In re Dr. Pepper Litigation, Chancery, Supreme and Superior, appraisal and unfair dealing fiduciary litigation;
  • Gyneconcepts, Inc. v. Kim, Chancery, breach of fiduciary duty litigation;
  • Wynnefield Partners, Chancery and Supreme, corporate books and records action;
  • The St. Joe Company v. Halliburton Energy Services, Inc., Superior and Federal District Court, breach of duty allegations arising out of BP oil spill;
  • Nichols v. Lewis, Chancery and Supreme, breach of contract;
  • Gore v. Gore, Chancery and Supreme, Court appointed guardian ad litem in trust litigation;
  • Paul v. Delaware Coastal Anesthesia, Chancery, defense of written consent action by LLC members;
  • Emerald Partners v. Berlin, Chancery and Supreme, breach of fiduciary duty case;
  • Estate of DiSabatino, Chancery and Supreme, construction of testamentary trust;
  • Law v. Law, Chancery and Supreme, action for breach of trustees' duties;
  • In re: Kloiber Trust, Chancery, action regarding dynasty trust;
  • NCC Rx, AAA arbitration, proceeding regarding Delaware limited liability company membership interests;
  • In re: Xstelos Holdings, Inc., Chancery, class action shareholder dispute regarding reverse stock split;
  • Other representations include power company corporate advice, sale of all assets of businesses, special committee investigation reports, chemical company supplier contract disputes, and numerous proxy fights and related Section 225 proceedings.

Previous Firm Practice:

  • Morris James, LLP, Associate (1994-2000); Partner (2001-2008).

Speaking Engagements:

  • Speaker, Trust Seminar (Delaware).
  • Speaker, Appraisal Litigation (Delaware).