About Constantine Cannon LLP · Washington
Constantine Cannon LLP is an internationally recognized U.S. law firm founded in 1994 in New York City, with offices in New York, Washington D.C., and San Francisco. The firm is best known for two flagship practices: antitrust (including two of the top five antitrust settlements in U.S. history) and whistleblower representation, having recovered more than $1 billion for governments and over $450 million in rewards for whistleblower clients. Its Washington D.C. office, located between the U.S. Capitol and the White House at 1001 Pennsylvania Avenue NW, serves clients nationally and internationally in whistleblower, antitrust, government affairs, intellectual property and technology, and complex litigation matters.
Constantine Cannon LLP is one law firm with two internationally renowned practices — antitrust and whistleblower representation — and a strong reputation in litigation, compliance, and intellectual property. Founded in 1994 in New York City, the firm has grown into a coast-to-coast practice with offices in New York, Washington D.C., and San Francisco. Its antitrust team has won some of the largest antitrust judgments in U.S. history, and its whistleblower attorneys have recovered more than $1 billion for federal and state governments plus over $450 million in whistleblower awards for individual clients under statutes including the federal and state False Claims Acts, the SEC and CFTC Whistleblower Programs, the IRS Whistleblower Program, and the Motor Vehicle Safety Whistleblower Act. The Washington D.C. office sits at 1001 Pennsylvania Avenue NW, Suite 1300N, between the U.S. Capitol and the White House, giving it direct proximity to key federal agencies such as the U.S. Department of Justice, the SEC, the IRS, the CFTC, and the U.S. Attorney's Office. From that location, the firm represents whistleblowers, corporations, and trade associations in matters involving corporate fraud, false claims, price-fixing, tax evasion, government contracting, intellectual property, telecommunications, and technology regulation. Attorneys at the firm have taught law, testified before Congress, and are routinely featured in outlets such as the New York Times, Wall Street Journal, Washington Post, NPR, Forbes, CNN, and Bloomberg.
- In business
- Founded 1994 (over 30 years)
- Serves
- Washington D.C. office serves clients nationally and internationally; firm represents clients in federal courts throughout the United States and in matters worldwide; Washington D.C. location serves government agencies including the U.S. Attorney's Office, DOJ, SEC, IRS, CFTC, and U.S. Department of Transportation.
- Rating
- Martindale-Hubbell 5.0/5.0 (5 peer reviews)
About Constantine Cannon
Founded in 1994 in New York City, Constantine Cannon describes itself as 'one law firm with two internationally renowned practices — antitrust and representing whistleblowers,' with additional strength in litigation, compliance, and intellectual property. The firm operates offices in New York, Washington D.C., and San Francisco, allowing its attorneys to work coast-to-coast on antitrust, whistleblower, and complex commercial litigation matters. Its experience in antitrust and unfair-practice litigation is unmatched by its own account, and its whistleblower attorneys have helped clients expose wrongdoing and secure more than $450 million in whistleblower rewards, in addition to the more than $1 billion recovered for federal and state governments.
- Founded in 1994 in New York City
- Three U.S. offices: New York, Washington D.C., San Francisco
- Two flagship practices: antitrust and whistleblower representation
- Additional practices: litigation, compliance, intellectual property
Washington D.C. Office
The Washington D.C. office of Constantine Cannon LLP is located at 1001 Pennsylvania Avenue NW, Suite 1300N, Washington, DC 20004, situated between the U.S. Capitol and the White House. The office serves clients nationally and internationally in practice areas that include Government Affairs, Intellectual Property and Technology, Antitrust Litigation and Counseling, and Whistleblower Representation. The location gives the firm direct access to federal agencies and Congressional offices, and the office is easily accessible by transit. The D.C. team has extensive experience working with the U.S. Attorney's Office, the IRS, the SEC, the DOJ, the U.S. Department of Transportation, and other agencies.
- Address: 1001 Pennsylvania Ave, NW, Suite 1300N, Washington, DC 20004
- Phone: 202.204.3500 | Fax: 202.204.3501
- Email: [email protected]
- Practice areas in D.C.: Government Affairs, Intellectual Property & Technology, Antitrust Litigation & Counseling, Whistleblower Representation
- Toll-free whistleblower intake: 347-417-2192
Whistleblower Practice
During the last two decades, Constantine Cannon's whistleblower lawyers have recovered more than $450 million in awards for whistleblowers. The firm represents clients under the False Claims Act and whistleblower laws covering the IRS, SEC, CFTC, and a range of state statutes and other programs. Clients come from a wide spectrum — from minimum-wage earners to senior management — and from industries including healthcare, government contracting, pharmaceuticals, education, financial services, securities, commodities, telecommunications, transportation, insurance, and technology. Constantine Cannon represented whistleblowers in several of the largest industry-specific recoveries to date, including cases against major hospital systems, banks, and government contractors.
- Federal and state False Claims Act / qui tam representation
- SEC Whistleblower Program (Dodd-Frank)
- CFTC Whistleblower Program (Dodd-Frank)
- IRS Whistleblower Program (tax fraud)
- Motor Vehicle Safety Whistleblower Act
- Anti-money laundering and sanctions whistleblower programs
- Confidential intake via encrypted online form or toll-free 347-417-2192
Whistleblower Team (Washington D.C.)
Constantine Cannon's Whistleblower Team has extensive experience under the wide array of whistleblower rewards statutes and programs. The team is described as having the resources to commit to any kind of matter regardless of how long or complex, and is prepared to take cases through trial and any appeals. Attorneys on the team have taught law, testified before Congress, and are routinely interviewed by leading media outlets.
- Gordon Schnell (firm's co-chair of the Whistleblower practice)
- Marlene Koury
- Hendrik Lammers — Washington D.C.
- Ginger Buck
- Alysia A. Solow
- Additional team members listed on the Whistleblower Team page
Antitrust and Complex Litigation
Constantine Cannon is internationally recognized for its antitrust practice and has been responsible for two of the top five antitrust settlements in U.S. history. In total, the firm has recovered more than $5 billion in damages and tens of billions of additional dollars in injunctive relief for its clients, on top of its whistleblower recoveries. The antitrust team litigates price-fixing, monopolization, and unfair-competition matters, and counsels clients on trade regulation and competition issues.
- Two of the top five antitrust settlements in U.S. history
- More than $5 billion in damages recovered for clients
- Tens of billions of dollars in additional injunctive relief
- Trade regulation counseling
Government Affairs and Other D.C. Practices
The Washington D.C. office practices before Congress and federal agencies in government affairs, legislative affairs, and regulatory matters. The office also handles intellectual property and technology, telecommunications, securities, and transportation law. Attorneys have held prominent government positions and bring insider knowledge of agencies and courts to client matters.
- Government affairs and legislative affairs
- Intellectual property and technology
- Telecommunications law
- Securities law
- Transportation law
Record of Success
Constantine Cannon's whistleblower representations have led to more than $1 billion in government and whistleblower recoveries, including several of the largest industry-specific recoveries to date. Notable results include representing a whistleblower in a case against affiliates of Oakland-based Kaiser Permanente over invalid diagnosis codes submitted for Medicare Advantage patients, and an Illinois False Claims Act case against eight of the nation's largest banks — including Bank of America, Barclays, Citigroup, JPMorgan Chase, Morgan Stanley, Fifth Third, and BMO. The firm finalized four blockbuster whistleblower settlements in 2020 and had a banner year in 2021.
- Kaiser Permanente Medicare Advantage False Claims Act case
- Illinois False Claims Act case against eight major banks
- Four blockbuster whistleblower settlements finalized in 2020
- Historic whistleblower successes in 2021
Contacting the Washington D.C. Whistleblower Lawyers
To speak confidentially with a whistleblower attorney in Washington D.C., prospective clients can call the toll-free whistleblower line at 347-417-2192 or complete an encrypted contact form on the firm's website. The firm's site notes that submission of the form does not itself create an attorney-client relationship, but that all submissions and follow-up communications are privileged and confidential and will not be shared or used without permission.
- Toll-free: 347-417-2192
- Encrypted contact form on constantinecannon.com
- Submissions are privileged and confidential
- Office: 1001 Pennsylvania Ave, NW, Suite 1300N, Washington, DC 20004