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Fietta LLP

Arbitration (International)

Global Guide 2026 : Global Market Leaders

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Fietta LLP

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About

Provided by Fietta LLP

Fietta LLP is a world-leading boutique law firm dedicated to public international law (PIL) and international arbitration. Our unique team of specialists have acted as counsel on some of the largest and most important PIL disputes of the past two decades. They have won a number of the most substantial or significant victories seen in investment arbitration cases over recent years.

Fietta LLP is renowned for its expertise and experience advising States, international organisations, multinational corporations and private clients across a range of international law matters. The firm also has a busy advisory practice, advising State (and other) clients on some of the most sensitive and important territorial, maritime and other PIL issues of the day.

Chambers Review

Provided by Chambers

Arbitration (International) - Global Market Leaders

Band 5

What the Team is Known For

Fietta is a highly rated London boutique, recognised for its specialist PIL knowledge and background handling major investment treaty arbitrations. The law firm offers:

• Advice for states, international organisations, multinational corporations and private clients across a range of international law matters.

• A wealth of experience in maritime boundary disputes and human rights matters.

• Strength handling investor-state arbitration and providing expert advice on treaty law.

• Well-versed expertise in European, Middle Eastern and Central Asian disputes.

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Strengths

Provided by Chambers

  • Fietta have very good knowledge of public international law and among the best international lawyers in the world.

    Arbitration (International) respondentGlobal

  • Fietta are very professional, have superb knowledge and provide great advice and judgement.

    Arbitration (International) respondentGlobal

  • The people from Fietta are all fast and responsive in addressing complex and sophisticated matters.

    Arbitration (International) respondentGlobal

Notable Practitioners

Provided by Chambers

  • Stephen Fietta
    Stephen Fietta

    Stephen Fietta

    Stephen Fietta KC is a preeminent and highly reputed figure in public international law. He often represents clients in high profile cases and is experienced acting before various major tribunals, including the ICJ, ITLOS, ICSID and the PCA. Areas of expertise include advising sovereign clients and private entities across investment treaty law, maritime law, environmental law and state succession disputes.

    • Stephen is an excellent all-round lawyer with impressive knowledge.

      Arbitration (International) respondentGlobal

    • Stephen is a brilliant public international law lawyer.

      Arbitration (International) respondentGlobal

    • Stephen is a consummate lawyer and professional. He is always a pleasure to work with.

      Arbitration (International) respondentGlobal
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  • Laura Rees-Evans
    Laura Rees-Evans

    Laura Rees-Evans

    Laura Rees-Evans is based in London and is experienced advising across a range of contentious and non-contentious public international law matters. Areas of strength include human rights law, international investment law, sovereignty issues and advising on the Law of the Sea.

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Ranked Individuals at Fietta LLP (3)

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Members

Provided by Fietta LLP

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