We’re a different kind of law firm. At Constantine Cannon, we listen. We apply our extensive legal knowledge and decades of experience. We work tirelessly for you from beginning to end. And together, we get results.Learn More
Our attorneys are both experts in antitrust law and seasoned litigators. Our approach to every case, whether on the plaintiff’s side or the defense, is to be prepared to take the case to trial.
The Constantine Cannon Whistleblower Lawyer Team has extensive experience representing whistleblowers under the qui tam provisions of the False Claims Act, the Dodd-Frank Act, the IRS Whistleblower Law, and the wide array of other federal and state whistleblower reward laws.
Constantine Cannon has broad experience representing plaintiffs and defendants in complex commercial litigations and arbitrations. Our reputation is built upon our central philosophy of aggressively and sensibly representing clients in all areas of commercial dispute.
We formed the Art and Cultural Property Law Group to make a total commitment to the art world. We pride ourselves in our knowledge of the art market, our legal expertise, our effectiveness, and our entrepreneurial spirit, which we share with many of our clients.
Constantine Cannon conducts efficient and effective internal reviews and investigations for its clients. We provide critical value by establishing the independence of investigations, a key issue both in seeking reduced penalties in criminal actions and in minimizing civil litigation exposure.
Our e-discovery practice group, comprised of a dedicated team of attorneys, project managers, and legal technology specialists is at the forefront of e-discovery theory and practice. We work closely with our clients to tailor creative and flexible discovery plans that mitigate both costs and litigation risk.
From our London office, we offer a full range of EU and UK antitrust counseling, merger control, cartel and litigation services, as well as compliance programs and advice on discrete areas of EU law, such as financial services and aviation law.
Constantine Cannon has extensive experience representing clients before numerous federal and state agencies, including the Department of Justice, the Federal Trade Commission, the Federal Communications Commission, the Federal Reserve Bank, and the Attorney General of every state active in antitrust enforcement.
We represent high technology companies in the consumer electronics, software, internet, webcasting, retail, and reprographics industries in a variety of matters involving copyright, trademark, trade secret, and patent law. We regularly practice before federal district courts and courts of appeals, as well as arbitrations, administrative agencies and tribunals.
Partner Ankur Kapoor was quoted in the Law360 article, After Ceasefire With Apple, Qualcomm's War Continues. Click here to read more.Read More
Partner Ankur Kapoor was quoted in the Law360 article, What’s At Stake In The Apple, Qualcomm Antitrust Trial. Click here to read more.Read More
Constantine Cannon “can claim to have won two of the three largest antitrust settlements in U.S. history.” – Global Competition Review, 2012
Athanasios Kalliris has been nominated by Concurrences for this year’s Antitrust Writing Awards, for the article he co-authored with Richard Pike on ‘The Role of the European Commission as an...Read More
Constantine Cannon Named National Tier-1 “Best Law Firm” for Antitrust Law and Antitrust Litigation – U.S. News Best Lawyers 2019
Partner Mary Inman was quoted in the Bloomberg article, UK's FCA Spent More on CEO Pay Than Aiding Whistle-Blowers. Click here to read the article.Read More