Jackson E. Warren
Philadelphia Office

1735 Market Street
21st Floor
Philadelphia, PA 19103-7505

P: 215-772-7407
F: 215-772-7620

Wilmington Office

1105 North Market Street
15th floor
Wilmington, DE 19801

P: 302-504-7827
F: 302-504-7820


Jackson Warren is an associate and member of Montgomery McCracken’s Business Litigation practice group. He represents businesses and individuals in a wide variety of commercial disputes, running the gamut from pre-litigation claims assessment, demand letters and ADR, to trial, appeals, and execution. Jackson focuses on Delaware’s state and federal courts and has successfully argued before the internationally recognized Court of Chancery.

Jackson’s practice includes control disputes, fiduciary duty claims, complex contract disputes, and business torts. He specializes in defending fraud and misrepresentation claims, including those involving violations of state and federal statutory and regulatory schemes. In particular, Jackson has defended numerous healthcare clients against fraud and unjust enrichment claims brought by insurers.

Jackson also specializes in antitrust litigation. He has defended clients against Sherman and Clayton Act claims, including price fixing, group boycotts, and illegal mergers, brought by competitors and as consumer class actions. He has also represented clients in obtaining Hart-Scott-Rodino clearance and in FTC, DOJ, and state antitrust investigations.

A member of the firm’s e-Discovery practice group, Jackson frequently leads discovery for complex cases, from ESI preservation and collection, to complex data analytics and large in-house and outsourced document reviews involving multi-jurisdiction litigation.

Prior to joining Montgomery McCracken, Jackson worked for a large national law firm. Prior to his legal career, Jackson was an orchestra conductor and double bassist and has worked for the Cincinnati Symphony, Tucson Symphony, Sarasota Orchestra and Arizona. He also holds a sommelier certification from the Philadelphia Wine School.

*Limited law practice under the Delaware Supreme Court’s emergency temporary Order relating to limited practice privilege (August 12, 2020) due to exceptional circumstances arising from the COVID-19 pandemic.

Selected Representations

  • Representation of specialty compounding pharmacies, pharmacists, doctors and pharmacy management company against major insurer’s claims of fraud, insurance fraud, unjust enrichment, and violations of state workers’ compensation laws and federal compounding regulations.
  • Defense of officers and directors of hospital and surgery center against claims of fraudulent and negligent misrepresentation brought by investors.
  • Defense of vertically integrated payment processing company against antitrust claims brought by competitor challenging mergers under Sherman and Clayton Acts.
  • Representation of movie studio and investment vehicles against claims brought by creditors and investors under the ERISA and RICO statutes and for common law fraud and unjust enrichment.
  • Defense of limited partnership and general partner in statutory partner removal action.
  • Defense of medical supplies distributor against antitrust claims of price fixing and group boycott brought by competitor and nation-wide class of consumers, and in related federal and state investigations.
  • Representation of historic hotel in property dispute litigation against neighboring hotel under construction.
  • Defense of officers and directors of security company in bankruptcy adversarial action alleging breach of fiduciary duties.
  • Defense of individuals in enforcement action brought by judgment creditor alleging common law partnership in real estate ventures.
  • Representation of medical supplies manufacturer in patent litigation with competitor.
  • Defense of urban health club chain in TCPA class action.
  • Defense of steel services company against claims by former executive for breach of contracts and violations of ERISA and state wage laws.
  • Representation of international construction contractor in dispute with supplier.
  • Representation of clothing manufacturer in contract dispute with major convenience store chain.
  • Defense of ambulatory surgery centers against claims of tortious interference with contracts and business relationships and theft of trade secrets brought by competitor.
  • Representation of medical device manufacturer in fraud investigation related to application for FDA approval.
  • Representations of medical device manufacturer in assessment of antitrust violations by competitors.
  • Representation of investor in suit alleging fraud and RICO claims in acquiring automotive franchise.
  • Representation of product manufacturer group as amici in personal jurisdiction appeal.

Selected Publications

Academic Achievements

Jackson received his J.D. degree from the University of Pennsylvania Law School in 2015. During law school, Jackson served as a judicial extern to Chief Judge Larry Alan Burns of the United States District Court for the Southern District of California. Jackson also holds degrees in orchestral conducting and double bass performance.