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Constantine Partasides KC

Constantine Partasides KC

UK 2026

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Three Crowns LLP
 Three Crowns LLP

Ranked in 4 practice areas

International Arbitration

UK-wide

10 years ranked

Energy & Natural Resources: Disputes

UK-wide

14 years ranked

International Arbitration: Arbitrators

UK-wide

10 years ranked

Public International Law

UK-wide

4 years ranked

About

Provided by Three Crowns LLP

Practice Areas

Constantine, one of the founding partners of Three Crowns, has appeared as lead counsel in some of the largest international arbitrations of the last two decades. He has secured a series of multi-billion dollar awards for his clients, and defended others in ‘bet-the-company’ claims arising in a number of different business sectors.

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.

Constantine is a solicitor-advocate (Higher Courts Civil) and was appointed King’s Counsel in 2014. He was educated at King’s College, London and Cambridge University.

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.

Personal

To read more, visit: https://www.threecrownsllp.com/team/constantine-partasides-kc/

Chambers Review

Provided by Chambers

Chambers Guide to the Legal Profession

International Arbitration - UK-wide

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.
View ranking table

International Arbitration: Arbitrators - UK-wide

Band 1
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.
View ranking table

Energy & Natural Resources: Disputes - UK-wide

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.
View ranking table

Public International Law - UK-wide

Band 3
Individual Editorial
Constantine Partasides KC is a highly esteemed practitioner with vast experience in investor-state arbitrations. He is well known for acting in high-value disputes under bilateral and multilateral investment treaties around the world.
Learn more about this teamView ranking table

Strengths

Provided by Chambers

  • Constantine provides excellent, thoughtful, strategic advice.

    International ArbitrationChambers Guide to the Legal Profession

  • Constantine is incredibly eminent and brilliant.

    International ArbitrationChambers Guide to the Legal Profession

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

    International ArbitrationChambers Guide to the Legal Profession

  • 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 Guide to the Legal Profession

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

    International ArbitrationChambers Guide to the Legal Profession

  • Constantine Partasides is a force of nature.

    Energy & Natural Resources: DisputesChambers Guide to the Legal Profession

Ranked Individuals at Three Crowns LLP (9)

UK-wide

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