“No other... practice can claim to have won two of the three largest antitrust settlements in US history.” — Global Competition Review, 2012 Constantine Cannon LLP is an internationally recognized law firm with offices in New York, Washington, D.C., and San Francisco. In addition to having one of the most successful teams of antitrust lawyers in the nation, we are also well known for our work in complex commercial litigation, intellectual property and technology, whistleblower law, government relations and advocacy, securities litigation, corporate compliance, monitoring and investigation, and electronic discovery consulting. We represent both plaintiffs and defendants, from individual entrepreneurs to Fortune 500 companies. On both the plaintiff and defense sides, we have obtained favorable results that include trial verdicts and settlements that rank among the largest of their kind. Our practice includes counseling foreign governments and companies on U.S. law and defending them in U.S. courts. We have successfully represented major corporations in international civil and criminal investigations, international arbitrations and dealings with the United Nations. Our combination of zealous advocacy, creative counseling and unwavering commitment to integrity and ethics has served our clients well, from the courtroom to the boardroom.