Philip J.Devenish


London + 44.20.7039.5531

Philip Devenish is a highly rated solicitor with a heavyweight cross-border disputes practice. In recent years he has won billions of dollars for clients in high-profile cases all over the world. Legal directories describe him as "an outstanding lawyer" (Who's Who Legal) who is "widely praised by peers and clients" (Expert Guides), "extremely impressive" (Chambers), "extremely sharp" (International Financial Law Review), and "thorough and unflappable – destined to do great things in the field" (The Legal 500).

Philip has acted for multinational corporations, ultra-high-net-worth individuals (UHNWIs), and sovereign States in some of the largest and most important arbitrations of the past decade, as ranked by The American Lawyer and Global Arbitration Review. Among other successes, he secured a US$1.3 billion damages award for a commercial bank in a landmark arbitration arising out of the Crimea annexation in 2014. He recently represented the Kingdom of Saudi Arabia in a US$2 billion arbitration arising out of the Qatar diplomatic crisis.

Philip also assists and advises clients in connection with regulatory investigations and civil and criminal proceedings brought by foreign government authorities. He regularly acts for corporations and UHNWIs facing allegations of financial wrongdoing, including fraud, money laundering, corruption, and bribery.

Philip is ranked among the world's leading practitioners in global disputes and has received various accolades for his work. He is named in The Legal 500 UK's Arbitration Powerlist of "the finest that London has to offer" and holds Law360's Rising Star award for "top attorneys under 40" whose career accomplishments transcend their age.


  • Major pharmaceutical company arbitrates claims arising out of Chinese investmentsJones Day is representing a major pharmaceutical company in a Hong Kong International Arbitration Centre arbitration arising out of representations and warranties given in respect of the client's investment in a Chinese drug development company whose senior officers and consultants were subsequently prosecuted in the United States for misappropriation of another pharmaceutical company's trade secrets.
  • PTTGC acquires allnex from AdventJones Day advised PTT Global Chemical Public Company Limited in the €4 billion acquisition of allnex Holding GmbH from Advent International.
  • Clients seek advice in connection with criminal investigation and potential criminal and civil claims relating to alleged fraud of over US$1 billionJones Day is advising clients in connection with a criminal investigation and potential criminal and civil claims relating to an alleged fraud of over US$1 billion.
  • Saudi businessman brings investment arbitration proceedings against Middle Eastern stateJones Day represents a Saudi Arabian businessman in investment arbitration proceedings against a Middle Eastern state.
  • Windoor arbitrates ICSID claim against KazakhstanJones Day is representing Estonian construction company AS Windoor in ICSID arbitration proceedings against the Republic of Kazakhstan.
  • U.S. healthcare company arbitrates ICC claim against Middle Eastern hospital proprietorJones Day is representing a Pittsburgh-based international healthcare management and consulting company in an ICC commercial arbitration against an owner of medical centers and clinics in the Middle East.
  • Canadian mining company initiates UNCITRAL arbitration against KazakhstanJones Day represents a Canadian mining company in an UNCITRAL arbitration against the Republic of Kazakhstan.