Justin W. Lamson

Of Counsel
New York

Justin W. Lamson is an antitrust and competition, and complex commercial litigation attorney with jury trial, appellate, class action, and international arbitration experience. Justin has represented clients in the pharmaceutical, payment card, and mortgage lending industries in matters involving a wide range of claims, including exclusive dealing, monopolization, trade secret misappropriation, and unfair competition. Justin also has provided clients antitrust compliance counseling in a variety of scenarios.


Representative Matters

  • In re Liquid Aluminum Sulfate Antitrust Litigation, (D.N.J.) (in progress) Representing multiple municipalities and water utilities as plaintiffs in multidistrict antitrust litigation claiming that defendants engaged in anticompetitive conduct in connection with the sale of aluminum sulfate, a water treatment chemical
  • Nasdaq, Inc. v. Exch. Traded Managers Grp., 2019 U.S. Dist. LEXIS 270135 (S.D.N.Y. Dec. 20, 2019) Obtained $80 million judgment in favor of Nasdaq after 10 day bench trial on claims that service provider for exchange traded funds misappropriated profits
  • Eisai, Inc. v. Sanofi-Aventis US, LLC, 821 F.3d 394 (3d Cir. 2016) Represented on appeal plaintiff Eisai in antitrust case concerning injectable anticoagulant drugs after the District Court had granted summary judgment against its claims

Professional Highlights

Pro Bono Experience

Justin's pro bono work includes representing a father seeking unpaid child support and custody under a Florida placement order. After suit was brought in New York to enforce placement order, the case settled with an order of custody support in favor of the father. Justin also participates in Ballard Spahr's Wills for Heroes program and the Clemency Project team, which was awarded the 2015 Alan J. Davis award for exemplary public service.

Professional Activities

American Bar Association

New York State Bar Association

Recognition & Accomplishments

New York Super Lawyers "Rising Star," 2015-2019

Speaking Engagements

Speaker, “Joint Conduct 101: Rule of Reason, Quick Look, and Truncated Rule of Reason,” ABA Section of Antitrust Law, November 23, 2015

Panelist, “Back to the Future: A CLE Focused on Antitrust Basics, the Evolution of Antitrust Law, and Ethical Pitfalls,” Ballard Spahr CLE Program, November 16, 2015

Panelist, “Exclusionary Practices Cases: Lessons Learned for Plaintiffs and Defendants,” Ballard Spahr CLE program, December 11, 2014


Contributor, Antitrust Adviser, Chapter on Section 2 of the Sherman Act (5th edition), 2017 (updated 2019)

Contributor, The Federal Antitrust Laws, Basri & Kagan, Corporate Legal Developments, Practicing Law in a Corporation, Practising Law Institute, updated annually, 2010-2019

Co-author, "Recent Federal Enforcement Activity in the Mortgage Lending Arena," Consumer Financial Services Law Report, October 9, 2012

Co-author, "Insurance for Sexual Abuse Claims in Light of Pending Legislation," New York Law Journal, May 20, 2009

Co-author, "Court Orders Joinder of Nonparty Mortgage Brokers in Discriminatory Impact Case," Consumer Financial Services Law Report, April 15, 2009



Fordham University School of Law (J.D. 2008)
Staff Member, Fordham International Law Journal

Savannah College of Art and Design (M.F.A. 2003)
May Olive Keys Lewis Fellow

University of Chicago (B.A. 1996)


New York

U.S. District Courts for the Southern and Eastern Districts of New York

U.S. Court of Appeals for the Second Circuit 

U.S. Court of Appeals for the Third Circuit