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Anthony Mansfield


Washington, D.C.

Mansfield Anthony
Anthony Mansfield


Washington, D.C.

Anthony Mansfield is a member of the investigations and litigation practice. He focuses his practice on commodities, securities and related derivatives litigation, complex commercial litigation and regulatory/enforcement matters. His representations include regulatory advice, compliance, enforcement and litigation matters involving the Commodity Futures Trading Commission (CFTC), the Federal Trade Commission, the Federal Energy Regulatory Commission (FERC), other federal and state regulatory agencies, the UK Financial Conduct Authority and the European Commission. He represents a broad range of market participants, including financial institutions, major oil companies, global trading companies, hedge funds, energy marketers, futures commission merchants and exchanges.

Prior to returning to private practice in 2007, Tony served as a Chief Trial Attorney and Counsel to the Director in the Division of Enforcement of the CFTC. While there, he managed a team of lawyers and investigators focused primarily on manipulation in the commodities markets. He was responsible for the Division’s investigations of numerous energy and power marketing companies relating to price reporting in the natural gas markets. He also played a central role in the Commission’s subpoena enforcement actions against natural gas price index compilers, involving First Amendment “Reporter’s Privilege” issues, and was central in the Commission’s defense of its exercise of jurisdiction over false reporting in the natural gas markets pursuant to the Commodity Exchange Act.

He is also a former member of the CFTC’s Energy and Environmental Markets Advisory Committee, and the Law & Compliance Executive Committee of the Futures Industry Association.

Tony has been recognized by Chambers USA as a stand out in this area. He has also been chosen by his peers for inclusion in The Best Lawyers in America three consecutive years for his high caliber of work in derivatives and futures law, and has been honored by The Legal 500 United States as a leader in energy law and securities litigation. A frequent speaker and author, he has written on commodities and derivatives legal issues.

Related articles

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Publications: 26 October 2020

U.S. Commodity Futures Trading Commission issues final position limits rule

On October 15, 2020, the U.S. Commodity Futures Trading Commission (“CFTC” or “Commission”) voted to approve a final rule on position limits for commodity derivatives (“Final Rule”).

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Publications: 24 April 2020

Covid-19 coronavirus: an overview of U.S. federal legislation phase 4

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Publications: 08 April 2020

Covid-19 coronavirus: an overview of the U.S. CARES Act Paycheck Protection Program

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Publications: 27 March 2020

Covid-19 coronavirus: an overview of U.S. federal legislation phases 1 and 2

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Washington, D.C.

Allen & Overy LLP
1101 New York Avenue, NW
Washington, D.C.

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U.S. Court of Appeals, 1st Circuit

U.S. District Court, District of Massachusetts

U.S. Supreme Court

Commonwealth of Massachusetts

District of Columbia


J.D., cum laude, Vermont Law School

M.S.L., cum laude, Vermont Law School

B.A., cum laude, Bowdoin College

Published work

  • "Insider Trading Enforcement Intensifies Across Markets and Regulators", New York Law Journal, Vol. 261-No. 18 (Jan. 28, 2019), with Eugene Ingoglia and Chelsea Pizzola
  • "Commodity Futures Trading Commission Enforcement", Global Competition Review: The Guide to Energy Market Manipulation (March 2018)
  • "Data Privacy & Transfer in Investigations," Global Investigations Review (November 3, 2017), with Sara Lenet and Jonathan Flynn
  • "Inside the New Forex Market Code of Conduct", Law360 (June 9, 2016), with Gregory Mocek, Jonathan Flynn, and Jorge Pesok
  • "Regulators are Widening the Spoofing Net", Law360 (May 26, 2016), with Gregory Mocek, Paul Pantano, and Jonathan Flynn
  • "Compliance Departments Must Continue to Evolve as Regulators Refine Their Approach to Spoofing", The National Law Review (May 5, 2016), with Gregory Mocek, Paul Pantano, and Jonathan Flyn