Aloysius Llamzon

King & Spalding LLP

Aloysius (Louie) Llamzon is a senior associate at King & Spalding’s Washington, D.C. and New York offices and a member of its International Arbitration practice group. His practice centers on the representation of corporate and sovereign clients in commercial, investment, and public international arbitrations.

He has appeared before tribunals under the ICC, ICSID, UNCITRAL, SIAC, and CRCICA rules in cases seated throughout the world, involving natural resources, energy, infrastructure, manufacturing, shareholder, and financial services disputes in Southeast and South Asia, the Middle East, Latin America, Africa, and Europe. He has also sat as arbitrator.

Prior to joining King & Spalding, Dr. Llamzon was Legal Counsel and then Senior Legal Counsel at the Permanent Court of Arbitration, the Peace Palace, The Hague. His duties included acting as Registrar and Tribunal Secretary in inter-State, investment, and commercial arbitrations involving States. He has considerable experience with cases in public international law, including the Abyei Arbitration, the Indus Waters Kishenganga Arbitration, and the Bay of Bengal Maritime Boundary Arbitration. He has advised numerous States Parties to the 1899 and 1907 Hague Conventions on the procedural aspects of international dispute settlement, including under the UN Convention on the Law of the Sea, various bilateral and multilateral investment treaties, and the UNCITRAL and PCA Arbitration Rules. He also assisted the former Chief Justice of the Netherlands in his capacity as Appointing Authority to the Iran-United States Claims Tribunal.

Louie was previously a corporate associate at Skadden, Arps, Slate, Meagher & Flom in Hong Kong and at Romulo, Mabanta, Buenaventura, Sayoc & de los Angeles in Manila. He is admitted to practice in New York and the Philippines, giving him familiarity with civil and common law systems. Louie was named in the inaugural edition of Who’s Who Legal Future Leaders – Arbitration 2017, a publication focused on outstanding practitioners aged 45 or under, which described him as a “star” and praised his “fantastic Asia practice.”

Dr. Llamzon holds A.B. and J.D. degrees from the Ateneo de Manila University, and LL.M. and J.S.D. degrees from Yale Law School. He has published widely on international law and arbitration, and is a former faculty member and adjunct lecturer at various law schools in Manila and The Hague. He has developed particular expertise on issues of corruption, fraud, and other forms of party wrongdoing in international arbitration. His book “Corruption in International Investment Arbitration” is an update of his J.S.D. dissertation, which won Yale’s Ambrose Gherini Prize for best work in international law. His article “Investor Wrongdoing in Investment Arbitration” won the 2017 Smit-Lowenfeld Prize as the best article in the field of international arbitration.

Louie is a frequent speaker on international dispute settlement and public international law matters, and has addressed the biennial congress of the International Council for Commercial Arbitration (ICCA) and the annual meetings of the American Society of International Law (ASIL) and the International Chamber of Commerce (ICC) Institute of World Business Law. He co-chaired the 2017 Annual Meeting of the American Society of International Law, and is a member of ASIL’s Nominating Committee.


  • J.S.D., Yale Law School
  • LL.M., Yale Law School
  • J.D., Ateneo de Manila University


  • District of Columbia
  • Hong Kong Registered Foreign Lawyer
  • New York
  • Phillippines


  • American Society of International Law
  • Integrated Bar of the Philippines
  • International Chamber of Commerce Young Arbitrators Forum (ICC YAF)
  • International Council for Commercial Arbitration; Young ICCA


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King & Spalding LLP can handle cases related to laws concerning Securities & Investment Fraud, International Law. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
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