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

Exclusively active in international disputes, Three Crowns LLP‘s London office acts for corporations in heavyweight investor-state proceedings brought against states, including matters that are not treaty-based. The team also defends states against claims. The practice is co-led by the ‘extremely sharp and convincing’ Constantine Partasides KC, who regularly obtains multibillion-dollar awards and is increasingly involved in arbitration-related litigation; and Gaëtan Verhoosel, who has a strong track record in complex investment treaty cases. The team further showcases Middle Eastern disputes specialist Reza Mohtashami KC, who acts for oil supermajors, construction firms, sovereign states and state entities; Manish Aggarwal, an expert in investor-state arbitrations under both UNCITRAL and ICSID rules; and Leilah Bruton, who ‘has amazing attention to detail’. Other names to note are energy disputes practitioner Hamid Abdulkareem; Farouk El-Hosseny, a specialist in commercial and investor-state disputes in the telecoms and oil and gas sectors; and Ridhi Kabra, who acts in investment treaty arbitrations in relation to taxation, infrastructure, telecoms, joint ventures, and oil and gas disputes. Carmen Martinez Lopez relocated to the firm’s Madrid office in October 2023.

Three Crowns LLP is consistently mandated to act in the market’s most significant commercial, investment and inter-state arbitral cases, as well as arbitration-related litigation. The firm also fields sector specialists in pharmaceuticals, aerospace, energy, construction, telecoms, and financial services. Following Russia’s invasion of Ukraine in February 2022, the practice was instructed by numerous energy-sector clients in high-value commercial disputes that concerned their exits from Russia. A ‘real star in commercial arbitration’, Constantine Partasides KC routinely obtains mega-value awards on behalf of major clients. Gaëtan Verhoosel KC is an expert in commercial and treaty arbitrations involving power, renewables, banking, infrastructure, and oil and gas. The practice also comprises Middle East disputes specialist Reza Mohtashami KC, who is a ‘very competent arbitration lawyer’, highly regarded commercial arbitration expert Manish Aggarwal, and Leilah Bruton, who ‘excels at both witness examination and delivering impactful closing arguments’. Other experienced arbitration practitioners are Jonathan Fernandes, who acts in international commercial and investment treaty arbitrations across a range of sectors, and Richard Trinick, who focuses on energy, M&A, telecoms and technology disputes. Carmen Martinez Lopez relocated to the firm’s Madrid office in October 2023, while Maanas Jain and Vee Vian Thien left the firm in September 2023 and June 2024, respectively.