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Roberto Lupini

Roberto Lupini

Senior Associate

London Tel +44 (0)20 7786 6261

roberto.lupini@arnoldporter.com vCard

Roberto is a leading practitioner in international investment law and public international law, with over a decade of experience advising sovereign States and private entities on complex, high-stakes matters. His practice spans both contentious and non-contentious work, with a particular focus on investor-State arbitration. He has represented States in dozens of investor-State arbitrations under ICSID and UNCITRAL rules, as well as multiple proceedings before the International Court of Justice (ICJ). Roberto also brings extensive experience in major commercial arbitration, successfully acting for public and private clients in multi-million-dollar disputes.

Beyond arbitration, Roberto has advised on a broad spectrum of public international law issues, including treaty negotiations, investment restructuring, enforcement of arbitral awards, exploitation of natural resources in disputed areas, statehood, land and maritime delimitation, human rights, international humanitarian law, and sovereignty questions.

Roberto has acted for States including Barbados, Croatia, Colombia, Costa Rica, Egypt, El Salvador, Grenada, Nigeria, Peru, Serbia, Slovenia, and Uruguay in investor-State disputes. He has also advised Albania, the Democratic Republic of the Congo, the Dominican Republic, Kenya and the United Arab Emirates on complex public international law matters. In recent years, Roberto has successfully represented investors—including multiple Fortune 500 companies—in multiple billion-dollar investor-State cases.

A frequent speaker at international conferences, Roberto regularly contributes to leading journals on public international law and arbitration. He is recognized in major legal directories, including as a “Thought Leader” by Lexology’s Arbitration Index, and praised by clients in Legal 500 as a “Rising Star” in international arbitration and public international law.

Roberto has multiple nationalities, reflecting his varied cultural background and global perspective. He is fluent in English, Spanish, and Italian.

Focus Areas

Experience

Brookfield Corporation v. Republic of Peru (ICSID Case No. ARB/25/14).
Unión de Cervecerías Peruanas Backus y Johnston S.A.A., Cervecería San Juan S.A. and AB InBev Southern Investment Ltd. v. Republic of Peru (ICSID Case No. ARB/24/53).
Fibranet, Sociedad Anónima v. Republic of El Salvador (ICSID Case No. ARB/25/6).
Gasoducto Sur Peruano S.A. En Liquidación v. Republic of Peru (ICSID Case No. ARB/24/29).
ENAGÁS S.A. (España) and ENAGÁS Internacional S.L.U. (España) v. Republic of Peru (ICSID Case No. ARB/18/26).

Glencore International A.G. v. Republic of Colombia (ICSID Case No. ARB/21/30).
José Alejandro Hernández Contreras v. Republic of Costa Rica (ICSID Case No. ARB(AF)/20/2).
Addiko Bank AG v. Republic of Slovenia (ICSID Case No. ARB/22/9).*
United Group B.V., Adria Serbia Holdco B.V., and Serbia Broadband–srpske kablovske mreže d.o.o. Beograd v. Republic of Serbia (ICSID Case No. ARB/21/5).*
APG SGA SA and D.O.O. za promet i usluge Alma Quattro Beograd v. Republic of Serbia (ICSID Case No. ARB/21/13).*
True Blue Development Limited and others v. Grenada (ICSID Case No. ARB/21/37).*
Koch Minerals Sàrl and Koch Nitrogen International Sàrl v. Bolivarian Republic of Venezuela (ICSID Case No. ARB/11/19) (Annulment phase).*
OI European Group B.V. v. Bolivarian Republic of Venezuela (ICSID Case No. ARB/11/25) (Annulment phase).*
Fábrica de Vidrios Los Andes, C.A. and Owens-Illinois de Venezuela, C.A. v. Bolivarian Republic of Venezuela (ICSID Case No. ARB/12/21) (Annulment phase).*
Fábrica de Vidrios Los Andes, C.A. and Owens-Illinois de Venezuela, C.A. v. Bolivarian Republic of Venezuela (ICSID Case No. ARB/12/21).*
Erste Group Bank AG and others v. Republic of Croatia (ICSID Case No. ARB/17/49).*
Addiko Bank AG and Addiko Bank d.d. (ICSID Case No. ARB/17/37).*
Raiffeisen Bank International AG and Raiffeisenbank Austria d.d. v. Republic of Croatia (ICSID Case No. ARB/17/34).*
UniCredit Bank Austria AG and Zagrebačka Banka d.d. v. Republic of Croatia (ICSID Case No. ARB/16/31).*
Al Jazeera Media Network v. Arab Republic of Egypt (ICSID Case No. ARB/16/1).*
Interocean Oil Development Company and Interocean Oil Exploration Company v. Federal Republic of Nigeria (ICSID Case No. ARB/13/20).*
Peter A. Allard v. The Government of Barbados (PCA Case No. 2012-06).*
An Asian mining company in relation to an investment treaty arbitration.*

*Reflects experience at previous employer.

Obligations of States in respect of Climate Change (Advisory Proceedings), International Court of Justice.*
Maritime Delimitation in the Indian Ocean (Somalia v. Kenya), International Court of Justice.*
Armed Activities on the Territory of the Congo (Democratic Republic of the Congo v. Uganda), International Court of Justice.*
Application of the International Convention on the Elimination of All Forms of Racial Discrimination (Qatar v. United Arab Emirates), International Court of Justice.*
Appeal Relating to the Jurisdiction of the ICAO Council under Article II, Section 2, of the 1944 International Air Services Transit Agreement (Bahrain, Egypt and United Arab Emirates v. Qatar), International Court of Justice.*

*Reflects experience at previous employer.

Representing a State-owned company in a billion U.S. dollar ICC arbitration proceeding concerning the alleged termination of two concession contracts for the exploration and exploitation of two oil & gas blocks.
Representing a State-owned company in an ICC arbitration proceeding concerning the alleged wrongful termination of a contract for the supply of bauxite.*
Representing an African State in an ICC arbitration concerning alleged breaches of a Power Purchase Agreement entered into by a State-owned electricity company.*
Representing a State-owned electricity company in an UNCITRAL arbitration proceeding concerning alleged breaches of a Power Purchase Agreement.*
Representing a State-owned electricity company in an UNCITRAL arbitration proceeding concerning the alleged wrongful termination of a contract.*

Representing an international energy services company in an ICC arbitration proceeding for breaches of a services contract subject to Venezuelan law.*
Representing a U.S. oil company in an ICC arbitration proceeding concerning the breach of two Association Agreements subject to Venezuelan law that resulted in an award of more than USD$66 million.*
Representing a U.S. oil company in two ICC arbitrations that were consolidated and subject to Venezuelan and New York law concerning a contractual dispute over an oil refinery.*
Advising several multinational companies on how to structure their investments to enjoy the protection of bilateral investment treaties.*
Advising a U.S. global corporation on an ICC arbitration.*

*Reflects experience at previous employer.

Advising an Asian State (through its anti-coup elected parliamentary committee) in relation to the international law aspects of the atrocities committed by the military in that country after a coup.*
Advising a Fortune 500 company on investment treaty law matters.*
Advising a Fortune 500 company on enforcement proceedings before the United States District Court for the District of Columbia concerning an ICSID award worth more than USD$400 million.*
Advising a major U.S. manufacturer on its options under investment treaties to respond to Mexico’s measures to confront the COVID-19 pandemic.*
Advising a U.S. manufacturer on a potential arbitration under the ICSID Additional Facility Rules.*

Advising a U.S. manufacturer on an ICC arbitration.*
Advising a Middle Eastern State in relation to the process of joining the International Covenant on Civil and Political Rights.*
Advising a Middle Eastern State in relation to a wide range of public international law matters ranging from territorial disputes to human rights violations.*
Advising a Caribbean State in relation to its trade negotiations and drafting of a new trade agreement with the United Kingdom in light of “Brexit” .*
Advising a State Entity in the Middle East in relation to the public international law framework of the Law of Occupation, Statehood, unitization, and joint development of cross-border oil fields.*
Advising a Middle Eastern State in relation to the drafting of a National Law to reflect principles of public international law and human rights law.*
Advising a major U.S. manufacturer on its options under investment treaties to respond to a Latin American State’s measures to confront the COVID-19 pandemic.*

*Reflects experience at previous employer.

Advising Albania in the case concerning Obligations of States in respect of Climate Change (Advisory Proceedings) before the International Court of Justice.*

*Reflects experience at previous employer.

Perspectives

December 4, 2025

Arnold & Porter Secures Settlement in ICSID Arbitration for Republic of El Salvador

Recognition

Lexology Index

“Future Leader” International Arbitration (2026)

The Legal 500 UK

"Recommended Lawyer" International Arbitration (2026)
"Recommended Lawyer" Public International Law (2026)

Credentials

Education

LL.M., University of Chicago, 2015
LL.B., Andrés Bello Catholic University, 2010

Admissions

Registered Foreign Lawyer (SRA), England & Wales
Venezuela

Languages

English
Spanish
Italian

Overview