Constantine Partasides KC > Three Crowns LLP > London, England > Lawyer Profile

Three Crowns LLP
New Fetter Place
8-10 New Fetter Lane

Work Department

International Arbitration


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.

He is also listed in the “Hall of Fame” for international arbitration in The Legal 500.


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 co-author of the fourth, fifth, and sixth editions of the leading textbook on international arbitration, Redfern and Hunter on International Arbitration. He is a Member of the ICCA Governing Board and a Director of the LCIA Board.


English, French, Greek


BA (Hons), Kings College London

MPhil, Cambridge University

Lawyer Rankings

London > Dispute resolution > International arbitration

(Hall of Fame)

Constantine Partasides KCThree Crowns LLP

The leading international arbitration boutique by far, Three Crowns LLP only accepts instructions for international disputes. The firm’s current commercial and investor-state caseload covers some of the highest-profile disputes in the world; and its industry expertise incorporates aerospace, energy, construction, telecoms, financial services, and Pharma. Experienced in obtaining multi-billion-dollar awards, Constantine Partasides KC has a growing arbitration-related litigation practice; and Gaëtan Verhoosel KC acts in commercial and treaty arbitrations across the power, banking, infrastructure, renewables, and oil and gas sectors. Also integral to the group, Reza Mohtashami KC is a Middle East disputes expert; Carmen Martinez Lopez is triple-qualified in England, New York and Spain; and Manish Aggarwal and Leilah Bruton act in investor-state and commercial cases. At counsel level, Hamid Abdulkareem is ‘an excellent lawyer‘ and Jonathan Fernandes acts under all major arbitration rules. Maanas JainRichard TrinickFarouk El-Hosseny and Vee Vian Thien are experienced senior associates.

London > Dispute resolution > Public international law

(Hall of Fame)

Constantine Partasides KCThree Crowns LLP

Three Crowns LLP‘s esteemed track record includes representing both states and corporations in business-critical investor-state disputes, including a sizeable number of treaty cases. The London group is also increasingly active in state-to-state cases and related disputes that feature challenging international law points. Constantine Partasides KC‘s recent experience comprises the attainment of mega-value awards, and has a growing arbitration-related litigation practice; and Gaëtan Verhoosel acts in high-value treaty arbitrations across all continents, in relation to the power, oil and gas, renewables, banking and infrastructure sectors. Other key practitioners are Middle Eastern and African disputes expert Reza Mohtashami KCCarmen Martinez Lopez, who routinely acts in heavyweight Latin American investor-state cases; investor-state arbitration specialist Manish Aggarwal; and Leilah Bruton, who acts in treaty disputes. Counsel Hamid Abdulkareem leads the firm’s African practice, while senior associate Farouk El-Hosseny‘s practice incorporates telecoms and oil and gas sector-related investor-state claims.