Claimant Investor
OAO Gazprom v. Republic of Lithuania (I), PCA Case No. 2011-16
OAO Gazprom v. Republic of Lithuania (II), PCA Case No. 2012-13
Rizzani de Eccher S.p.A., Obrascón Huarte Lain S.A. and Trevi S.p.A. v. State of Kuwait, ICSID Case No. ARB/17/8
Occidental Exploration and Production Company v. The Republic of Ecuador, LCIA Case No. UN3467
Occidental Petroleum Corporation and Occidental Exploration and Production Company v. The Republic of Ecuador, ICSID Case No. ARB/06/11
Blue Sea Holding LLC and Oceans Group International SA v. Republic of Panama, PCA Case No. 2022-50
Odebrecht Latinvest S.à.r.l. v. Republic of Peru, ICSID Case No. ARB/20/4
Oded Besserglik v. Republic of Mozambique, ICSID Case No. ARB(AF)/14/2
Odyssey Marine Exploration, Inc. v. United Mexican States, ICSID Case No. UNCT/20/1
OI European Group B.V. (OIEG) v. Bolivarian Republic of Venezuela, ICSID Case No. ARB/11/25
OAO Tatneft v. Ukraine, PCA Case No. 2008-8
OKKV (OKKB) and others v. Kyrgyz Republic
Oko Pankki Oyj, VTB Bank (Deutschland) AG and Sampo Bank Plc v. The Republic of Estonia, ICSID Case No. ARB/04/6 (formerly OKO Osuuspankkien Keskuspankki Oyj and others v. Republic of Estonia)
Olayan Financing Company (Kingdom of Saudi Arabia) v. State of Qatar, PCA Case No. 2023-78
Oļegs Roščins v. Republic of Lithuania, ICSID Case No. ARB/18/37
Oleovest Pte. Ltd. v. Republic of Indonesia, ICSID Case No. ARB/16/26
Eudoro Armando Olguín v. Republic of Paraguay, ICSID Case No. ARB/98/5
Olin Holdings Ltd v. Libya, ICC Case No. 20355/MCP
Olympic Entertainment Group AS (Estonia) v. Republic of Ukraine, PCA Case No. 2019-18
Omega Engineering LLC and Oscar Rivera v. Republic of Panama, ICSID Case No. ARB/16/42
OmniTRAX Enterprises Inc. and Others v Canada
OOO Manolium Processing v. Republic of Belarus, PCA Case No. 2018-06
Jan Oostergetel and Theodora Laurentius v. The Slovak Republic, UNCITRAL
Operadora Portuaria Centroamericana, S.A. de C.V. v. Republic of Honduras, ICSID Case No. ARB/24/33
Optima Ventures LLC and Optima 55 Public Square LLC v. United States of America (II), ICSID Case No. ARB/21/12
Optima Ventures LLC, Optima 7171 LLC and Optima 55 Public Square LLC v. United States of America (I), ICSID Case No. ARB/21/11
Orange S.A. v. Republic of Iraq, ICSID Case No. ARB/20/42
Orange SA v. Hashemite Kingdom of Jordan, ICSID Case No. ARB/15/10
Orascom Telelcom Holding v. Algeria, UNCITRAL
Orascom TMT Investments S.à r.l. v. People's Democratic Republic of Algeria, ICSID Case No. ARB/12/35
Orazul International España Holdings S.L. v. Argentine Republic, ICSID Case No. ARB/19/25
PanAfrican Energy (Tanzania) and Pan African Energy Corporation (Mauritius) v. Tanzania and Tanzania Petroleum Development Corporation (TPDC)
Nationale-Nederlanden Holdinvest B.V. and others v. Argentine Republic, ICSID Case No. ARB/19/11
Orla Mining Ltd. v. Republic of Panama, ICSID Case No. ARB/24/27
The Estate of Julio Miguel Orlandini-Agreda and Compañía Minera Orlandini Ltda. v. Bolivia, PCA Case No. 2018-39
Oschadbank v. Russian Federation, PCA Case No. 2016-14
OTP Bank Plc v. Republic of Croatia, ICSID Case No. ARB/20/43
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
Fábrica de Vidrio Los Andes, C.A. and Owens-Illinois de Venezuela, C.A. v. Bolivarian Republic of Venezuela, ICSID Case No. ARB(AF)/22/3
Oxus Gold v. Republic of Uzbekistan, UNCITRAL
Dieter Emil Schelling and others v. United Republic of Tanzania, PCA Case No 2023-13
Ozkartallar Inşaat Sanayi Ve Ticaret A.S. and Campak Temizlik Bilgi Işlem Otomasyon Saglik Hizmetleri Iletişim Sanayi Ve Ticaret A.S. v. Islamic Republic of Pakistan, ICSID Case No. ARB/22/16
Öztaş Construction, Construction Materials Trading Inc. v. Libya, ICC Arbitration No. 21603/ZF/AYZ