
International Arbitration: Investor-State Arbitration
UK Guide 2026 : UK-wide
Rankings

Ranked Individuals
Ranked Individuals
About
Provided by Debevoise & Plimpton LLP
Debevoise has been present in Europe for over 60 years, giving our practice a depth of institutional knowledge and market awareness that few firms can match. Today, the European disputes team includes lawyers who are both civil- and common-law qualified, speak over 35 languages, and are recognized as leaders in their field.
Our European disputes practice is advocacy-led. Our versatile trial lawyers, arbitration specialists and regulatory experts together cover the full range of contentious proceedings: arbitration before every major arbitral institution; arbitration-related court proceedings for interim measures, emergency injunctions, anti-suit relief, award challenge and enforcement; regulatory investigations and national court litigation — all handled seamlessly across jurisdictions. We take matters through every stage, from initial risk assessment through hearing, settlement, or enforcement, providing a continuity and quality of service that is unmatched in the market.
Debevoise partners hold leadership positions in leading arbitral institutions and professional bodies and lead proceedings in English, French, German, Italian, Portuguese, and Spanish. Building on our lockstep, collaborative culture, our team works seamlessly across offices and practice groups to ensure that whatever the scale or complexity of a matter, clients have access to the right combination of skills and experience.
Chambers Review
Provided by Chambers
Work Highlights
Provided by Chambers
Debevoise represented Suomi Power Networks, Supernova and AMF, shareholders in Caruna, Finland's largest electricity distribution company, in an ICSID arbitration against The Republic of Finland under the Energy Charter Treaty.
Strengths
Provided by Chambers
They are very responsive, collaborative and creative.
International Arbitration: Investor-State Arbitration respondentUKDebevoise demonstrate outstanding experience in international commercial disputes, client focus and risk appetite in pursuing complex claims in onerous jurisdictions.
International Arbitration: Investor-State Arbitration respondentUKThey are very dedicated to the details of all causes, as well as being extremely organised and attentive.
International Arbitration: Investor-State Arbitration respondentUKThey are incredibly responsive and good listeners.
International Arbitration: Investor-State Arbitration respondentUK
Notable Practitioners
Provided by Chambers
Band 1 
Band 1 
Jeffrey Sullivan
Jeffrey Sullivan KC is co-chair of Debevoise's arbitration group in Europe. He is particularly known for his expert handling of claims brought under the ECT, which forms part of his extensive investor-state arbitration practice. He demonstrates strength across the energy and infrastructure sectors. Jefferey is extremely clear and sees any issues straight away.
International Arbitration: Investor-State Arbitration respondentUKJeffrey has an excellent technical skill set.
International Arbitration: Investor-State Arbitration respondentUKJeff is always available, delivers straightforward practical advice and is great at handling clients.
International Arbitration: Investor-State Arbitration respondentUKJeffrey is an excellent operator with extensive experience, sensible judgement and measured advice.
International Arbitration: Investor-State Arbitration respondentUKJeffrey provides excellent support.
International Arbitration: Investor-State Arbitration respondentUK
Band 3 
Band 3 
Patrick Taylor
Patrick Taylor has a broad arbitration practice with expertise spanning the oil and gas, energy and telecoms sectors. He often acts under LCIA, ICC and ICSID rules and handles disputes seated across the globe. Patrick Taylor is technically excellent, and his cerebral, smooth advocacy style delivers results for his clients.
International Arbitration: Investor-State Arbitration respondentUKPatrick provides strong advice and works cohesively with the Debevoise team to provide clear and consistent advice.
International Arbitration: Investor-State Arbitration respondentUKPatrick is very practical yet provides a wide variety of approaches and options.
International Arbitration: Investor-State Arbitration respondentUKPatrick is extremely engaged and committed to the case, with a broad view of the dossier.
International Arbitration: Investor-State Arbitration respondentUKPatrick is very clever and savvy.
International Arbitration: Investor-State Arbitration respondentUK
Band 4 
Band 4 
Samantha Rowe
Samantha Rowe boasts an impressive client list, which includes sovereign states and renowned international organisations such as those in the oil and gas sector. She regularly handles disputes under ICC, ICSID and UNCITRAL rules. Samantha is extremely engaged and committed to the case.
International Arbitration: Investor-State Arbitration respondentUKSamantha is always strategic and provides high-quality advice.
International Arbitration: Investor-State Arbitration respondentUKSamantha knows her area of law inside out, and we like to work with her. She is technically brilliant.
International Arbitration: Investor-State Arbitration respondentUK
Band 6 
Band 6 
Conway Blake
Conway Blake regularly advises and acts for clients in both investor-state and commercial disputes, as well as in challenges to arbitral awards.
Conway is an accomplished, brilliant young partner.
International Arbitration: Investor-State Arbitration respondentUKHe is very strategic and achieves a good result for the clients.
International Arbitration: Investor-State Arbitration respondentUK
Ranked Individuals at Debevoise & Plimpton LLP (4)
Members
Provided by Debevoise & Plimpton LLP

Tony Dymond

David W. Rivkin

Aimee-Jane Lee

Samantha J. Rowe

Peter Goldsmith
Head of Department

Samantha Rowe
View profile of Samantha Rowe
Patrick Taylor
View profile of Patrick Taylor
Jeffrey Sullivan
View profile of Jeffrey Sullivan
Conway Blake
View profile of Conway Blake
Debevoise & Plimpton LLP has rankings in the following guides
Band 1 Brazil 2025
Practice area: International Arbitration
Location: Brazil
View department profile for Brazil 2025Band 1 Global 2026
Practice area: International Arbitration
Location: Brazil
View department profile for Global 2026Band 1 Latin America 2026
Practice area: International Arbitration
Location: International Counsel
View department profile for Latin America 2026
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