Investor-state Arbitration

A leading investor-state arbitration practice

Our global investor-state arbitration team specialises in cross-border, multi-jurisdictional and complex cases under International Investment Agreements. We advise our clients at every stage in the arbitration process – from commencement of proceedings to enforcing arbitral awards or resisting challenges to awards.

We have a strong track record of advising states and state-owned entities, as well as claimant investors. We also have numerous members of our international arbitration team sitting as arbitrators in investor-state disputes. This gives us a unique insight into the operation of the investor-state system, particularly in relation to jurisdictions which have less experience of the regime. We are particularly well known for operating in emerging markets and challenging jurisdictions.

Our breadth and depth of arbitration experience is unparalleled at a global level in the market and we have a vast amount of experience in all major centres and with many of the specialist arbitral institutions, including ICSID and UNCITRAL.

Our experience includes acting on a number of high-profile and often politically sensitive cases that have required careful management to ensure a favourable result for our clients across the globe.

Our Investor-state Arbitration Work

  • All
  • Africa
  • Asia Pacific
  • Latin America
  • Middle East
  • UK & Europe
  • Representing a British investor against the United Mexican States

    Represented an investor in an ICSID arbitration claim lodged against Mexico in relation to a maritime transport services dispute.

    Representing an African investor against the Republic of Gambia

    Representation of an investor in an ICSID arbitration concerning the oil & gas sector.

    Representing an American investor against the Republic of Guyana

    Representing an American investor bringing an ICSID claim against the Republic of Guyana in relation to the withdrawal of the country’s first parking concession in the capital city of Guyana.

    Representing an investor against the Republic of Gambia

    Represented an investor in an ICSID arbitration concerning the oil & gas sector.

    Representing the Republic of Tanzania

    Representation of the Republic of Tanzania and State-owned entity in the ICSID annulment proceedings of an award concerning a project for the construction and operation of a power station.

    Representing the Republic of Yemen

    Represented the Republic of Yemen in an ICSID arbitration involving claims in excess of US$110 million relating to the construction of an airport terminal in the capital city of Yemen.

    Representing Ukraine

    Represented Ukraine in an ICSID arbitration concerning fines imposed on tobacco manufacturers by the State Antimonopoly Committee.

    Successfully representing an investor against the Republic of Gambia

    Successful representation an investor in an ICSID arbitration concerning the mining sector, with US$22 million awarded in compensation. Successful representation in subsequent ICSID annulment proceedings, with application to set aside the award dismissed.

    Successfully representing the Republic of Cameroon

    Successfully defended the Republic of Cameroon by securing the dismissal of a US$1 billion claim brought against the Republic of Cameroon before ICSID concerning the alleged expropriation of an online platform.

    Successfully representing the Republic of Mauritania

    Successfully defended the Republic of Mauritania in its first ICSID arbitration, concerning an iron ore mining project, involving claims running into hundreds of millions of dollars.

  • Successfully representing the Republic of Cameroon

    Successfully defended the Republic of Cameroon by securing the dismissal of a US$1 billion claim brought against the Republic of Cameroon before ICSID concerning the alleged expropriation of an online platform.

    Cameroon

    Representing an African investor against the Republic of Gambia

    Representation of an investor in an ICSID arbitration concerning the oil & gas sector.

    Gambia

    Successfully representing an investor against the Republic of Gambia

    Successful representation an investor in an ICSID arbitration concerning the mining sector, with US$22 million awarded in compensation. Successful representation in subsequent ICSID annulment proceedings, with application to set aside the award dismissed.

    Gambia

    Representing an investor against the Republic of Gambia

    Represented an investor in an ICSID arbitration concerning the oil & gas sector.

    Gambia

    Successfully representing the Republic of Mauritania

    Successfully defended the Republic of Mauritania in its first ICSID arbitration, concerning an iron ore mining project, involving claims running into hundreds of millions of dollars.

    Mauritania

    Representing the Republic of Tanzania

    Representation of the Republic of Tanzania and State-owned entity in the ICSID annulment proceedings of an award concerning a project for the construction and operation of a power station.

    Tanzania

    ICSID Arbitration defending the Republic of Cameroon

    Defended the Republic of Cameroon in investor-state arbitration under the ICSID rules. The Luxembourgish claimant alleged expropriation in the banking sector. The Tribunal dismissed the case with costs.

    Cameroon
  • ICSID Arbitration regarding expropriation

    Acting for a South Asian Government at the International Centre for the Settlement of Investment Disputes (ICSID) in a case involving expropriation, the claim has been brought under the UK-Sri Lanka bilateral investment treaty.

    Sri Lanka
  • Representing an American investor against the Republic of Guyana

    Representing an American investor bringing an ICSID claim against the Republic of Guyana in relation to the withdrawal of the country’s first parking concession in the capital city of Guyana.

    Guyana

    Representing a British investor against the United Mexican States

    Represented an investor in an ICSID arbitration claim lodged against Mexico in relation to a maritime transport services dispute.

    Mexico
  • Representing the Republic of Yemen

    Represented the Republic of Yemen in an ICSID arbitration involving claims in excess of US$110 million relating to the construction of an airport terminal in the capital city of Yemen.

    Yemen

    Yemeni USD 10.9 billion Production Sharing Agreement ICC Arbitration

    Successfully acting on a multi-billion dollar arbitration concerning the Republic of Yemen's national wealth and in relation to a 20-year old Production Sharing Agreement (PSA) regarding the Marib Block 18 oil field in the Yemen. Reported in The American Lawyer as the 2nd largest contract dispute and the largest ICC arbitration in their 2007 Arbitration Scorecard.

    Yemen
  • Successfully representing Ukraine

    Successfully defended Ukraine in legal proceedings in France and Luxembourg, including before the Luxembourg Supreme Court, in claims brought against Ukraine in an attempt to enforce against sovereign assets an SCC award issued against a defunct State-owned entity.

    Ukraine

    Representing Ukraine

    Represented Ukraine in an ICSID arbitration concerning fines imposed on tobacco manufacturers by the State Antimonopoly Committee.

    Ukraine

Our Investor-state Arbitration team

Ivan Urzhumov
Ivan Urzhumov

Partner

Loukas Mistelis
Loukas Mistelis

Partner

Sophie Bayrou
Sophie Bayrou

Counsel

Yaye Diabaté
Yaye Diabaté

Senior Associate

Catherine Wang
Catherine Wang

Senior Associate

Valentin Bourgeois
Valentin Bourgeois

Senior Associate

Constance Malleville
Constance Malleville

Senior Associate

Robin Bandar
Robin Bandar

Associate

Saskia Wolters
Saskia Wolters

Associate

Juan Diego Niño-Vargas
Juan Diego Niño-Vargas

Associate

Dilara Khamitova
Dilara Khamitova

International Arbitration Jurist

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