Three Crowns maintained a leading ranking for International Arbitration in The Legal 500 – Latin America 2021 edition. Gaëtan Verhoosel, Constantine Partasides QC, Carmen Martinez Lopez, and Agustín G. Sanz are recognised individually.


In once again naming Three Crowns a leading practice, The Legal 500 highlights the firm’s “impressive reputation for international arbitration . . . in Latin America.” The publication also notes, “Leveraging its deep sector expertise, it is a popular choice among leading companies in the energy, construction, utilities, financial services and mining sectors in both commercial and investment treaty arbitration across the region.”

According to one client, Three Crowns’ “compact team . . . stands out above the rest,” with the lawyers being “more friendly, close and efficient,” and another client noting the team sets itself apart with its “high dedication and passion for the work.”


Gaëtan Verhoosel

Verhoosel is once again named a “Leading Individual,” with The Legal 500 highlighting his “strong reputation for Latin American disputes.” Verhoosel has served as advocate and as arbitrator in numerous commercial and investment treaty arbitrations where significant financial recoveries were at stake or novel legal issues raised.

Constantine Partasides QC

Partasides repeats in the rankings for 2021 as a “Recommended Lawyer.” Partasides has appeared as counsel in some of the largest commercial arbitrations of the past decades and his broad practice includes inter-State and investment treaty disputes. He has published extensively on international arbitration and international law.

Carmen Martinez Lopez

Martinez Lopez is named a “Leading Individual” in the 2021 rankings. As a Spanish and Latin America expert, she has appeared as advocate in numerous investment treaty and commercial arbitrations, both under the rules of the major arbitral institutions and ad hoc, across a variety of jurisdictions.

Agustín G. Sanz

Sanz repeats in the rankings for 2021 as a “Rising Star.” He has extensive experience of both international commercial and investment treaty arbitrations involving disputes in a broad range of sectors, including infrastructure and highway concession agreements, oil and gas, energy, water treatment, technology, public works, sovereign debt, and agribusiness, while also regularly advising international clients in connection with local administrative and court proceedings in Latin America.


Three Crowns is a firm committed to excellence in international arbitration and international law. Founded by practice leaders with decades of experience across many different international firms, it is recognised as one of the premier arbitration practices in the world. Its clients—including Fortune 500 companies and sovereign States—entrust the firm with their most important disputes.

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