Department profile
Volterra Fietta

International Arbitration: Investor-State Arbitration

UK Guide 2026 : UK-wide


Volterra Fietta

Rankings

About

Provided by Volterra Fietta

Volterra Fietta has one of the world’s largest investor-State arbitration practices.  It represents States and foreign investors in investment treaty arbitrations before ICSID and other arbitral institutions.  In addition, the firm regularly represents governments in State-to-State arbitrations under the PCA and UNCLOS Annex VII rules as well as private and public entities in commercial arbitrations before the ICC, the LCIA and other arbitration centres. 

In two ICSID arbitrations against Venezuela, Volterra Fietta recently secured a USD 455 million award for OI European Group and a USD 370 million award for Koch Minerals and Koch Nitrogen International. Led by Robert Volterra and Álvaro Nistal, the firm then successfully represented OI European Group in ICSID annulment proceedings initiated by Venezuela.  The annulment application was rejected in its entirety and Venezuela was ordered to bear the entirety of the proceedings’ costs.

Equally, led by Robert Volterra and Graham Coop, the firm successfully represented Barbados in an UNCITRAL arbitration brought by a Canadian investor. The firm achieved the complete dismissal of all claims and USD 3 million in costs to Barbados.

The firm is currently representing Croatia in five ICSID arbitrations.  Among other clients, the firm also is representing Egypt, Nigeria and subsidiaries of Koch Industries in multiple high-profile arbitrations and annulment proceedings.

Clients (8)

  • The Arab Republic of Egypt
  • Barbados
  • The Republic of Croatia
  • The Dominican Republic
  • Koch Industries Inc., United States
  • The Federal Republic of Nigeria
  • The Republic of Lithuania
  • Owens-Illinois Inc., United States

Industries (15)

  • Hydrocarbon concessions
  • Energy and natural resources
  • Telecoms
  • Power and electricity
  • Shipping
  • Heavy and light manufacturing
  • Petrochemicals
  • Banking and financial services
  • Tourism
  • Lotteries and gaming
  • Water and sewerage concessions
  • Construction
  • Agriculture
  • Food production and distribution
  • Sovereign debt

Chambers Review

Provided by Chambers

International Arbitration: Investor-State Arbitration - UK-wide

Band 3

Band 3


What the Team is Known For
Volterra Fietta is a formidable boutique specialising in PIL and investor-state arbitrations. It regularly represents international corporations and sovereign states in oil and gas BIT disputes. The firm also provides advice on treaty interpretation and state responsibility.

Work Highlights

Provided by Chambers

  • Volterra Fietta continued to represent the Republic of Croatia in an ICSID arbitration concerning the legislative measures enacted by Croatia to contain the fallout of the financial crises in Croatian housing and consumer credit.

Strengths

Provided by Chambers

  • Volterra Fietta continuously adapts and provides creative solutions to overcome roadblocks and unforeseen hurdles.

    International Arbitration: Investor-State Arbitration respondentUK

Notable Practitioners

Provided by Chambers

  • Band 1Robert Volterra
    Band 1Robert Volterra

    Robert Volterra

    Robert Volterra is a formidable arbitration specialist with long-standing expertise in investor-state arbitration. He attracts an impressive international client base with a broad caseload of complex investment treaty claims, and is experienced in acting as both counsel and arbitrator.
    • Robert is an exceptional lawyer.

      International Arbitration: Investor-State Arbitration respondentUK

Ranked Individuals at Volterra Fietta (2)

UK-wide

Members

Provided by Volterra Fietta

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