People

William B. Panlilio is an Associate in the Singapore office of King & Spalding and a member of the firm’s Trial & Global Disputes practice, with a focus on international arbitration. William represents clients in the energy, infrastructure, construction and mining sectors, and in arbitrations involving States and State-owned or affiliated entities. He also has experience in cross-border litigation disputes, including in the enforcement of foreign arbitral awards, foreign sovereign immunities, and discovery in aid of foreign proceedings.

William additionally has significant global transactions experience advising companies regarding, among others, share acquisitions, corporate restructurings, shareholder matters, power purchase agreements, fuel supply agreements, mining agreements, and financing agreements.

Prior to joining King & Spalding, William was an Assistant Legal Counsel at the Permanent Court of Arbitration in The Hague, The Netherlands. While at the court, he assisted arbitral tribunals in treaty and commercial arbitrations involving various combinations of States, State entities, international organizations and private parties. Before The Hague, William was a Litigation Associate at an international law firm in New York,  specializing in complex commercial litigation, financial institutions litigation, and cases involving U.S. foreign relations law, including the Alien Tort Statute.

William graduated with magna cum laude honors from Fordham University School of Law in New York, where he was inducted into the Order of the Coif (national law honors society) and was awarded the Whitmore Gray Prize for Excellence in International Law. He also has a Masters in International Affairs, with a specialization in international law, from Columbia University’s School of International and Public Affairs where he was the recipient of the Robert and Buena Chilstrom Distinguished Fellowship. William finished his undergraduate degree, with honors, from the Ateneo De Manila University in the Philippines.

William is a member of the firm-wide Associates’ Committee and Head of the Singapore Diversity Committee.  He is admitted to practice in New York.

Select Publications

“Claims for Expropriated Property in Cuba Under the Helms-Burton Act," King & Spalding Client Alert, 17 January 2019

"U.S. Supreme Court Clarifies Rules Governing Proof of Foreign Law," King & Spalding Client Alert, 28 June 2018

“Defending Against Alien Tort Statute Cases Post-Kiobel,” The American Law Institute, Seminar on Kiobel: The Supreme Court Redefines Alien Tort Statute Litigation - What's Left?, 12 June 2013 

“The Supreme Court Limits Alien Tort Statute Litigation - But the Door Remains Slightly Ajar,” American Bar Association, Corporate Counsel, 8 July 2013 

Full Bio

Credentials

J.D., Fordham University School of Law, magna cum laude & Order of the Coif

M.A., Columbia University

A.B. Philosophy, Ateneo de Manila University, honors

U.S. District Court for the Eastern District of New York

U.S. District Court for the Southern District of New York

English

Magna cum laude and Order of the Coif


Fordham University School of Law

Whitmore Gray Prize for Excellence in International Law


Fordham University School of Law

Robert and Buena Chilstrom Distinguished Fellow


Columbia University School of International and Public Affairs

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Recognition

Magna cum laude and Order of the Coif


Fordham University School of Law

Whitmore Gray Prize for Excellence in International Law


Fordham University School of Law

Robert and Buena Chilstrom Distinguished Fellow


Columbia University School of International and Public Affairs

Matters

Representative International Arbitration and Litigation Experience

Representing Chevron Corporation in a multi-billion dollar UNCITRAL arbitration under the U.S.-Ecuador Bilateral Investment Treaty concerning the USD 9 billion Lago Agrio environmental judgment issued by the Ecuadorian courts.

Representing a U.S. mining company against a Latin American country in an UNCITRAL arbitration arising from a bilateral free trade agreement. The dispute concerns a copper mining project and poly-metallic smelting operation.

Representing a major South East Asian conglomerate in a SIAC arbitration against a South East Asian company. The dispute is a shareholder dispute concerning business interests valued at more than USD 1 billion, and implicates the laws of a number of jurisdictions.

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Matters

Representative International Arbitration and Litigation Experience

Representing Chevron Corporation in a multi-billion dollar UNCITRAL arbitration under the U.S.-Ecuador Bilateral Investment Treaty concerning the USD 9 billion Lago Agrio environmental judgment issued by the Ecuadorian courts.

Representing a U.S. mining company against a Latin American country in an UNCITRAL arbitration arising from a bilateral free trade agreement. The dispute concerns a copper mining project and poly-metallic smelting operation.

Representing a major South East Asian conglomerate in a SIAC arbitration against a South East Asian company. The dispute is a shareholder dispute concerning business interests valued at more than USD 1 billion, and implicates the laws of a number of jurisdictions.

Representing a South East Asian mining company in a SIAC arbitration against its joint venture partner. The dispute relates to a gold and copper mining project valued at more than USD 300 million, and implicates issues of public policy and parallel domestic court proceedings.

Representing investors in proceedings before U.S. federal courts to enforce a USD 500 million arbitral award against the Republic of Kazakhstan arising out of an arbitration under the Energy Charter Treaty.

Representing investors in proceedings before U.S. federal court commenced by the Republic of Kazakhstan under the Racketeer Influenced and Corrupt Organizations Act pertaining to a USD 500 million arbitral award under the Energy Charter Treaty.

Representing investors in proceedings commenced by the Republic of Kazakhstan before U.S. federal court on discovery in aid of foreign proceedings. The case involves the laws on enforcement of foreign arbitral awards of at least four jurisdictions.

Represented investment company in proceedings before U.S. federal court on discovery in aid of foreign proceedings. The case involves the laws of four different jurisdictions, including civil, criminal, bankruptcy, corporate, and contract law, before five separate international legal fora.

Represented a private consortium in the transportation sector in an UNCITRAL arbitration against a South East Asian government.

Represented a Korean contractor in an UNCITRAL arbitration in Singapore concerning claims of approximately AU$ 1 billion stemming from the design and construction of an iron ore mine in Western Australia.

Represented one of the largest North Asian oil refining companies in a SIAC arbitration against a North American oil exploration and production company pertaining to a share purchase agreement governed by Japanese law.

Represented a joint venture between two major South East Asian conglomerates in pre-arbitration proceedings against a South East Asian government. The dispute pertains to a transportation-related concession agreement.

Advised a South East Asian power utility in respect of a potential dispute against a South East Asian independent power producer. The matter involved one of the largest power projects in South East Asia.

Represented Chinese state-affiliated Sinopec in a USD 5 billion Alien Tort Statute action in the United States District Court for the Central District of California. The dispute involved questions of foreign sovereign immunity, liabilities of corporations for international law violations, and extra-territorial application of U.S. foreign relations law.

Advised a European investment company on risk management issues arising from an Alien Tort Statute case against one of the largest power generation companies in the world.

Representative Global Transactions Experience

Represented Sarawak Energy Berhad on all transactional work related to the implementation of the Sarawak Corridor of Renewable Energy (SCORE) Program, one of the five economic corridors established by the Federal Government of Malaysia,  including advise on international joint ventures to develop coal mine operations and transportation logistics, including a portfolio of coal-fired, gas-fired, and hydropower projects of over 6000 MW.

Represented SN Aboitiz Power-Benguet, Inc., a joint venture between SN Power AS of Norway and Aboitiz Power Corporation of the Philippines, with respect to the USD 400 Million refinancing for the 145 MW Ambuklao-Binga Hydropower Project.

Represented SN Aboitiz Power-Magat, Inc.,  a joint venture between SN Power AS of Norway and Aboitiz Power Corporation of the Philippines, with respect to the development and financing of the 8.5 MW Maris Main Canal 1 Hydropower Project.

Represented The AES Corporation in the USD 525 Million financing of its 335 MW Masinloc coal-fired expansion project.

Represented The AES Corporation in its purchase of IFC's stake in the Masinloc power project and associated back-to-back holding company share issuance to EGCO.

Matters

Representative International Arbitration and Litigation Experience

Representing Chevron Corporation in a multi-billion dollar UNCITRAL arbitration under the U.S.-Ecuador Bilateral Investment Treaty concerning the USD 9 billion Lago Agrio environmental judgment issued by the Ecuadorian courts.

Representing a U.S. mining company against a Latin American country in an UNCITRAL arbitration arising from a bilateral free trade agreement. The dispute concerns a copper mining project and poly-metallic smelting operation.

Representing a major South East Asian conglomerate in a SIAC arbitration against a South East Asian company. The dispute is a shareholder dispute concerning business interests valued at more than USD 1 billion, and implicates the laws of a number of jurisdictions.

See more
Icon close

Close

Matters

Representative International Arbitration and Litigation Experience

Representing Chevron Corporation in a multi-billion dollar UNCITRAL arbitration under the U.S.-Ecuador Bilateral Investment Treaty concerning the USD 9 billion Lago Agrio environmental judgment issued by the Ecuadorian courts.

Representing a U.S. mining company against a Latin American country in an UNCITRAL arbitration arising from a bilateral free trade agreement. The dispute concerns a copper mining project and poly-metallic smelting operation.

Representing a major South East Asian conglomerate in a SIAC arbitration against a South East Asian company. The dispute is a shareholder dispute concerning business interests valued at more than USD 1 billion, and implicates the laws of a number of jurisdictions.

Representing a South East Asian mining company in a SIAC arbitration against its joint venture partner. The dispute relates to a gold and copper mining project valued at more than USD 300 million, and implicates issues of public policy and parallel domestic court proceedings.

Representing investors in proceedings before U.S. federal courts to enforce a USD 500 million arbitral award against the Republic of Kazakhstan arising out of an arbitration under the Energy Charter Treaty.

Representing investors in proceedings before U.S. federal court commenced by the Republic of Kazakhstan under the Racketeer Influenced and Corrupt Organizations Act pertaining to a USD 500 million arbitral award under the Energy Charter Treaty.

Representing investors in proceedings commenced by the Republic of Kazakhstan before U.S. federal court on discovery in aid of foreign proceedings. The case involves the laws on enforcement of foreign arbitral awards of at least four jurisdictions.

Represented investment company in proceedings before U.S. federal court on discovery in aid of foreign proceedings. The case involves the laws of four different jurisdictions, including civil, criminal, bankruptcy, corporate, and contract law, before five separate international legal fora.

Represented a private consortium in the transportation sector in an UNCITRAL arbitration against a South East Asian government.

Represented a Korean contractor in an UNCITRAL arbitration in Singapore concerning claims of approximately AU$ 1 billion stemming from the design and construction of an iron ore mine in Western Australia.

Represented one of the largest North Asian oil refining companies in a SIAC arbitration against a North American oil exploration and production company pertaining to a share purchase agreement governed by Japanese law.

Represented a joint venture between two major South East Asian conglomerates in pre-arbitration proceedings against a South East Asian government. The dispute pertains to a transportation-related concession agreement.

Advised a South East Asian power utility in respect of a potential dispute against a South East Asian independent power producer. The matter involved one of the largest power projects in South East Asia.

Represented Chinese state-affiliated Sinopec in a USD 5 billion Alien Tort Statute action in the United States District Court for the Central District of California. The dispute involved questions of foreign sovereign immunity, liabilities of corporations for international law violations, and extra-territorial application of U.S. foreign relations law.

Advised a European investment company on risk management issues arising from an Alien Tort Statute case against one of the largest power generation companies in the world.

Representative Global Transactions Experience

Represented Sarawak Energy Berhad on all transactional work related to the implementation of the Sarawak Corridor of Renewable Energy (SCORE) Program, one of the five economic corridors established by the Federal Government of Malaysia,  including advise on international joint ventures to develop coal mine operations and transportation logistics, including a portfolio of coal-fired, gas-fired, and hydropower projects of over 6000 MW.

Represented SN Aboitiz Power-Benguet, Inc., a joint venture between SN Power AS of Norway and Aboitiz Power Corporation of the Philippines, with respect to the USD 400 Million refinancing for the 145 MW Ambuklao-Binga Hydropower Project.

Represented SN Aboitiz Power-Magat, Inc.,  a joint venture between SN Power AS of Norway and Aboitiz Power Corporation of the Philippines, with respect to the development and financing of the 8.5 MW Maris Main Canal 1 Hydropower Project.

Represented The AES Corporation in the USD 525 Million financing of its 335 MW Masinloc coal-fired expansion project.

Represented The AES Corporation in its purchase of IFC's stake in the Masinloc power project and associated back-to-back holding company share issuance to EGCO.

Credentials

J.D., Fordham University School of Law, magna cum laude & Order of the Coif

M.A., Columbia University

A.B. Philosophy, Ateneo de Manila University, honors

U.S. District Court for the Eastern District of New York

U.S. District Court for the Southern District of New York

English

Magna cum laude and Order of the Coif


Fordham University School of Law

Whitmore Gray Prize for Excellence in International Law


Fordham University School of Law

Robert and Buena Chilstrom Distinguished Fellow


Columbia University School of International and Public Affairs

Icon close

Close

Recognition

Magna cum laude and Order of the Coif


Fordham University School of Law

Whitmore Gray Prize for Excellence in International Law


Fordham University School of Law

Robert and Buena Chilstrom Distinguished Fellow


Columbia University School of International and Public Affairs