LAWYER PROFILE
Constantine Partasides KC

Constantine Partasides KC

Global 2026

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Three Crowns LLP
 Three Crowns LLP

Ranked in 4 practice areas

Arbitration (International)

Global Market Leaders

6 years ranked

International Arbitration

UK

4 years ranked

Energy & Natural Resources: Disputes

UK

12 years ranked

Arbitration (International)

Europe-wide

18 years ranked

Dispute Resolution

Africa-wide

13 years ranked

About

Provided by Three Crowns LLP

Global

Practice Areas

Constantine, one of the founding partners of Three Crowns, has appeared as counsel in some of the largest international arbitrations of the last two decades.

In addition to his counsel work, Constantine appears regularly as arbitrator, including in disputes that involve States and State entities. He has experience acting as Chairman or Sole Arbitrator in cases under the ICC Rules, the LCIA Rules, the SCC Rules, and the UNCITRAL Rules.

Professional Memberships

Constantine is a Member of the ICCA Governing Board and a Director of the LCIA Board.

Publications

Constantine is a co-author of the fourth, fifth, sixth and seventh editions of the leading textbook on international arbitration, Redfern and Hunter on International Arbitration.

Chambers Review

Provided by Chambers

Chambers Global Guide

International Arbitration - UK

Star Individuals
Individual Editorial
Constantine Partasides KC is a highly esteemed arbitration specialist acting for top-echelon clients in complex commercial and investment treaty disputes. He is also recognised for his capabilities as arbitrator.
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Arbitration (International) - Global Market Leaders

Star Individuals
Individual Editorial

Constantine Partasides KC is based in London and is one of the founding partners of the firm. He is highly commended in the international arbitration field and is renowned for his extensive experience representing clients across a range of international arbitration and public international law matters. Areas of strength include excellent knowledge of the energy and natural resources industry, as well as a strong ability to handle ground-breaking investment treaty arbitrations.

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Energy & Natural Resources: Disputes - UK

Band 1
Individual Editorial
Constantine Partasides KC of Three Crowns is held in high regard for his experience representing oil and gas companies in arbitration proceedings. He frequently assists with investment treaty claims against sovereign states, as well as disputes concerning gas purchase and production sharing agreements.
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Arbitration (International) - Europe-wide

Band 1
Individual Editorial

One of Three Crowns' top London-based practitioners, Constantine Partasides KC is a towering figure in the arbitration world, frequently acting for multinational energy companies in highly sensitive investor-state disputes. He is also highly experienced in commercial arbitration.

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Dispute Resolution - Africa-wide

Band 2
Individual Editorial

London-based Constantine Partasides KC is an experienced international arbitration counsel widely regarded as one of the most notable in his field around the world. He is regularly instructed by international corporates operating in Africa as part of his wider global practice. He is notably active on disputes concerning Nigeria, with further experience in a number of other jurisdictions. He is heavily engaged on disputes in the oil and gas sector.

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Strengths

Provided by Chambers

  • Constantine has impeccable advocacy skills; he can react quickly to tribunals and questions.

    International ArbitrationChambers Global Guide

  • Constantine provides excellent, thoughtful, strategic advice.

    International ArbitrationChambers Global Guide

  • Constantine is incredibly eminent and brilliant.

    International ArbitrationChambers Global Guide

  • Constantine is without a doubt one of the best advocates of our age; a great orator who knows exactly how to deliver a case. He's got a very lovely and engaging style.

    International ArbitrationChambers Global Guide

  • He is very attuned to the needs of the client.

    International ArbitrationChambers Global Guide

  • Constantine Partasides is very good. He has a boutique arbitration practice.

    Energy & Natural Resources: DisputesChambers Global Guide

Ranked Individuals at Three Crowns LLP (37)

Africa-wide

Europe-wide

France

Global Market Leaders

Greece

Latin America - International Counsel

Singapore

Spain

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