Guillaume de Rancourt’s practice focuses on domestic and international litigation and arbitration.

He also has extensive experience in global investigations and compliance issues, with a particular emphasis on anti-money laundering, anti-terror financing and anti-corruption matters.

Guillaume joined the firm’s Paris office in 2005 and became counsel in 2018. From 2008 to 2009 and from 2011 to 2012, he was resident in the New York office.

Notable Experience

  • Crédit Lyonnais in lawsuits in New York federal court based upon allegations under the U.S. Anti-Terrorism Act that the bank is responsible for acts of international terrorism because it maintained accounts for a Palestinian charity in France.

  • Telecom Italia in defending annulment proceedings against a favorable award obtained in an ICC arbitration seated in Paris brought by the Opportunity Group.

  • Sanofi in proceedings brought by Rhodia in ad hoc arbitration proceedings governed by French law and related annulment proceedings of the award before the French courts.

  • Nexans S.A. in an ICC arbitration brought by Madeco S.A., a Chilean cable manufacturer, regarding the post-closing purchase price adjustment for Nexans’ purchase of Madeco’s South American cable and wire business.

  • Tatneft in the successful defense of a nine-figure award rendered in favor of Tatneft following an UNCITRAL arbitration against Ukraine under the Russia-Ukraine bilateral investment treaty.

  • The Russian Federation in arbitrations brought by the former majority shareholders of Yukos Oil Company under the Energy Charter Treaty.

See More