News 01 Oct. 2026
Once again, Curtis has been recognized as a Leading Firm across multiple practice areas by Legal 500 UK in its 2027 edition. The International Arbitration, Commercial Litigation, Public International Law, and Oil & Gas groups were ranked, with numerous individual recognitions also received, as attested by this year's research.
Consistently recognized for representing sovereign nations in investor-state arbitrations before international tribunals, the team's experience spans maritime delimitation, state immunity, and international humanitarian law. Heading the 'market-leading' team, Charles Buderi and Luciana Ricart, both advise on PIL issues as well as investment arbitrations, primarily acting for sovereign states and state entities.
As well as partners Charles Buderi and Luciana Ricart, Lise Johnson is also recognized as a Recommended Lawyer by Legal 500, whose practice encompasses human rights and business, climate change, and international investment law. Counsel Salah Malas and Associate Belén María Ibañez are also listed as Recommended Lawyers in the Guide.
Key client testimonials:
The Oil & Gas group are known for their long-standing representation of governments, national oil companies, and regulators in the sector. Marc Hammerson, ranked as Leading Partner, focuses on M&A, project development, and restructuring in the oil and gas industry. Juan Carlos Boué, a key transactional specialist, and Walid El Nabal, who specialises energy disputes, are also recommended in the Guide.
Known for representing sovereigns in investor-state and inter-state disputes, the London team also acts for multinational corporations in international commercial arbitrations. Partners Charles Buderi, Luciana Ricart and Justin Jacinto are recognized for their arbitration practices in the Guide, as well as Counsel Claudia King.
The London commercial disputes team represents a range of international and domestic clients, including sovereign states and governments.
Heading the team, William Hampson is listed as a Recommended Lawyer, as well as Partners Luciana Ricart, Walid El Nabal and Thomas Francis.
The full editorial is available here.
Public International Law
Energy (Oil & Gas)
Commercial Disputes - Litigation
International Arbitration
Commercial Disputes - Arbitration
Charles L. O. Buderi
Partner
Luciana Teresa Ricart
Lise Johnson
Marc Hammerson
Walid El Nabal
Juan Carlos Boué
Justin M. Jacinto
William Hampson
Thomas Francis
Claudia King
Counsel
Salah Malas
Belén María Ibañez
Associate
London
+44 20 3430 3000
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