Three Crowns LLP
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International disputes specialist Three Crowns LLP continues to receive mandates from significant Spanish and Latin American clients, with both sovereigns and multinational corporations calling upon the firm to represent them in investor arbitrations. Due to a strong presence among Spanish-speaking clients, the firm opened a new Madrid office in autumn 2023, headed by Carmen Martinez Lopez, whose expertise spans a variety of industries, including hydrocarbons, electricity, construction, and pharmaceuticals. The new office has resulted in a growing demand from Latin America and has allowed the team to be more responsive to its clients’ needs due to stronger economic and cultural ties. 2024 saw the practice continue to be involved in significant investment treaty arbitrations, such as its representation of the Republic of Chile in an ICSID claim relating to the construction of the Cardones-Polpaico Electricity Transmission line, co-led by Agustin G. Sanz. Beyond investment treaty work, the firm boasts an impressive repertoire of commercial cases in Latin America in significant industries such as aviation and oil and gas. Gaëtan Verhoosel KC, who splits his time between London and Madrid, has been active in representing Sacyr in a treaty claim against the Republic of Panama. Laura França Pereira is a promising, bilingual associate who is qualified to practise in Brazil, New York and Washington DC.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'They're a true team. Their detailed knowledge of all the topics, and especially their timely approach to each case, is always an added value.'
‘I have had the opportunity to work with Three Crowns, and it is an outstanding international law firm. The team at Three Crowns is composed of highly skilled and well-prepared lawyers who consistently demonstrate exceptional technical expertise. The firm's commitment to providing practical and strategic legal solutions sets it apart in the field, making it a trusted partner for complex legal matters.’
Key clients
- Sacyr
- ConocoPhillips
Work highlights
Representing Chevron in its investment treaty arbitration against Ecuador before an arbitral tribunal under the auspices of the Permanent Court of Arbitration concerning a $9.5bn judgment against Chevron issued by Ecuadorian courts.


