Lathrop B. Nelson, III
Philadelphia Office

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

P: 215-772-7473
F: 215-731-3708


Lathrop B. Nelson, III is co-chair of Montgomery McCracken’s White Collar and Government Investigations practice. He concentrates on complex commercial litigation and white collar and government investigations. He has particular experience handling civil and criminal matters involving alleged fraudulent conduct, including alleged violations of the False Claims Act, as well as health care fraud, public corruption, antitrust and collusive behavior, environmental crimes, tax fraud, securities fraud, the Foreign Corrupt Practices Act, and other financial crimes. He represents individuals and corporate entities in all phases of civil and criminal litigation, including internal investigations.

Lathrop has argued civil and criminal matters before the United States Court of Appeals for the Third and Fourth Circuits, Pennsylvania Commonwealth and Superior Courts and federal and state trial courts. He is a former member of the Pennsylvania Supreme Court’s Appellate Rules Committee, which makes formal recommendations to the Court to refine the appellate rules.

Prior to joining Montgomery McCracken, Lathrop was a law clerk for the Honorable Eduardo C. Robreno of the United States District Court for the Eastern District of Pennsylvania.

Selected Representations

Lathrop has represented clients in criminal matters, civil False Claims Act proceedings, and related enforcement actions involving a wide range of alleged offenses, including:

  • Successfully defended U.S. Army BG Jeffrey Sinclair as part of trial team in court-martial in which court imposed no jail sentence and no dismissal from service; drafted and argued motion to dismiss for unlawful command influence, which the court granted, finding unlawful command influence in connection with offer to plead
  • Medical device company in an investigation regarding alleged violations of the Food Drug & Cosmetic Act
  • Individuals and physician practices in investigations involving allegations of Medicaid and insurance fraud, illegal kickbacks, and other statutory and regulatory violations
  • Pharmaceutical company in a False Claims Act investigation involving donations to patient assistance programs
  • Mortgage foreclosure services entities in a False Claims Act civil action alleging fraudulent claims submitted to Fannie Mae, Freddie Mac, and the Federal Housing Authority
  • Executive of a public corporation in a Foreign Corrupt Practices Act investigation by the Department of Justice and Securities and Exchange Commission
  • Individuals and entities in investigations by the Antitrust Division of the Department of Justice regarding bid-rigging in public finance, Superfund contracting, and municipal tax lien industries
  • Individuals and entities in criminal tax investigations and prosecutions
  • Nonprofit entity in an investigation by the Environmental and Natural Resources Division of the Department of Justice

Lathrop has also represented companies and individuals in a wide range of commercial disputes in state and federal court. He frequently represents clients in matters involving fraud, breach of fiduciary duties, and business torts, as well as intellectual property, breach of contract and other commercial matters, including:

  • Creditors’ Committees in the Energy Future Holdings and Specialty Products Holding Corp. (Bondex) bankruptcies involving claims alleging fraudulent transfers and breach of fiduciary duties
  • Corporate entity investigating and pursing claims arising out of a multimillion dollar theft by employees
  • Pharmaceutical companies in civil actions relating to pricing and marketing disputes
  • Clients in matters involving allegations of tortious interference with contract, fraud, breach of fiduciary duty, theft of trade secrets, non-competition disputes, and other business tort claims
  • Major software manufacturer in federal copyright and trademark infringement litigation in Pennsylvania and New Jersey

Selected Publications

Selected Speaking Engagements

Community Involvement

  • Board of Directors, Washington & Lee University Alumni Association
  • Secretary, The Haverford School Alumni Executive Council
  • Former President, Washington & Lee University Alumni Association’s Philadelphia Chapter
  • Former Chairman, Chi Psi Fraternity’s National Executive Council
  • Former Chairman, Chi Psi Fraternity’s national housing corporation (Spencer Properties, LLC)
  • Leadership Philadelphia’s Core Class (2015)
  • Former Board of Directors, Committee of Seventy
  • Former Rector’s Warden, Vestry of St. Peter’s Church of Philadelphia

Honors & Awards

  • The Best Lawyers in America© – Appellate Practice; Criminal Defense: White-Collar, 2022
  • Pennsylvania Super Lawyers Rising Stars, 2006, 2010-2015

No aspect of these advertisements have been approved by the highest court of any state. See Awards Methodology

Professional Activities & Achievements

  • American Bar Association
  • Philadelphia Bar Association
  • Former Member, Appellate Court Procedural Rules Committee of the Supreme Court of Pennsylvania
  • Former co-chair, Philadelphia Young Lawyers Division of the American Bar Association’s White Collar Crime Committee

Academic Achievements

Lathrop received his J.D. degree in 2001 from the University of Virginia School of Law, where he served as Chief Justice of the William Minor Lile Moot Court Board and a member of the Editorial Board of the Virginia Law Review. He graduated, cum laude, from Washington and Lee University in 1997 with a Bachelor of Arts degree in History and Politics.