Constantine Cannon LLP

About Constantine Cannon LLP

Constantine Cannon LLP is a law firm established in New York City in 1994. Its public materials focus on antitrust work and on representing whistleblowers, and they also describe commercial litigation, intellectual property and technology matters, government relations, and corporate compliance, monitoring, and investigations. The firm says it provides electronic discovery consulting and handles litigation and arbitration disputes for both plaintiffs and defendants.

According to its materials, the firm's clients have included large multinational corporations, emerging companies, industry groups, non-profit organizations, and individuals. Its website lists a New York office at 22 Vanderbilt Avenue, 15th Floor, New York, NY 10017, along with offices in Washington, D.C., and San Francisco, and London. Other published sources also describe the firm as having offices in New York, Washington, D.C., and San Francisco.

Practice areas

Areas of work that Constantine Cannon LLP describes on its own website. They describe the organization as a whole, not the practice of any individual attorney listed below.

Organization profile based on its official website and public sources (reviewed October 29, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with Constantine Cannon LLP.

Registered attorneys

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