Constantine | Cannon LLP




Our national reputation for excellence is based on successes in numerous high-profile antitrust cases. We were founded in 1994 as a boutique antitrust firm by Lloyd Constantine, the former Chief of the Antitrust Bureau of the Office of the Attorney General of New York, and maintain our commitment to antitrust today.

We have developed expertise in industries including payment systems (credit and debit cards), telecommunications, health care, high technology, advertising, and the airline industry. Many of our attorneys developed their antitrust expertise through past careers as antitrust enforcement officials with state and federal agencies. Our attorneys have taught antitrust law, testified before Congress on antitrust and international trade issues, made presentations or given speeches at seminars, industry forums, and various educational programs, and have authored books and countless articles on a variety of issues dealing with antitrust law and compliance.

We also serve clients in matters of commercial litigation; employment and employee benefits; intellectual property and technology; government relations; government agency advocacy; trusts and estates; environmental litigation and counseling; corporate compliance, monitoring and investigation; and electronic discovery consulting.

We remain best known for our record-breaking accomplishments on behalf of plaintiffs. We nonetheless have substantial experience representing defendants — from Fortune 500 companies to small, family firms — in antitrust and commercial litigation.



Our billing rates and total fees are significantly less than those charged by larger firms. We are nonetheless proud to deliver a quality of work that exceeds those firms'.

Constantine Cannon's work is "uniformly excellent, and thus it is no surprise that it has led the effort that produced the largest antitrust settlement ever."

The Honorable John Gleeson, United States District Court
for the Eastern District of New York, In re Visa Check / MasterMoney Antitrust Litigation, No. 96 CV 5238 (JG), Memorandum and Order, Dec. 19, 2004, at 34.




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