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Christopher Michael Viapiano


Christopher Michael Viapiano

Washington, D.C. +1-202-956-7500+1-202-956-7500 +1-202-293-6330+1-202-293-6330
[email protected]

Christopher Michael Viapiano is a partner in the Firm’s Litigation Group. Mr. Viapiano represents U.S. and non-U.S. companies and financial institutions in complex antitrust, commodities, securities and shareholder derivative litigation, criminal and regulatory enforcement matters and corporate internal investigations. He has represented clients under investigation by the U.S. Department of Justice, the U.S. Securities and Exchange Commission, the U.S. Commodity Futures Trading Commission, the Office of the Comptroller of the Currency, the Federal Reserve, the U.S. Internal Revenue Service and state attorneys general. Mr. Viapiano clerked for the Honorable Donald F. Parsons, Jr. of the Delaware Court of Chancery (2005-2006).

Mr. Viapiano was named a Client Service All-Star by BTI in 2019.


  • Represents JPMorgan Chase in securities and bankruptcy litigation arising out of the bankruptcy of Millennium Health, a drug testing company.
  • Represents MUFG Bank, Ltd. in government investigations by the U.S. Department of Justice, Antitrust Division, and U.S. Commodity Futures Trading Commission, and in antitrust, commodities and RICO litigation arising out of allegations of the manipulation of the London Interbank Offered Rate (Libor), the Tokyo Interbank Offered Rate (Tibor) and the Singapore Interbank Offered Rate (Sibor).
  • Represents Wells Fargo & Co. in multiple securities fraud and shareholder derivative actions arising out of allegations of improper sales practices in its Community Bank and the forced placement of auto insurance.
  • Successfully represented one of the largest ocean container shipping companies in a U.S. Department of Justice criminal cartel investigation.
  • Successfully represented MUFG Bank, Ltd, in obtaining a motion to quash a post-judgment citation and subpoenas. The citation and subpoenas purportedly required MUFG, which operates hundreds of branches in more than 40 countries around the world, to conduct a worldwide search for Iranian assets and, if it found such assets, to freeze them and produce documents and information about them.
  • Represented JPMorgan Chase in consolidated securities fraud, shareholder derivative and ERISA litigation arising out of the bank’s 2012 so-called “London Whale” trading losses.
  • Represented BP p.l.c. in Norex Petroleum Ltd. v. Access Industries, Inc. et al., a $1 billion RICO and tort litigation in both federal and state court in New York relating to BP’s joint venture interests in Russia.
  • Successfully defended Thomas W. Weisel in a qui tam action brought on behalf of the U.S. government by former professional cyclist Floyd Landis in connection with the doping scandal surrounding Lance Armstrong and the United States Postal Service Cycling Team.