Respondent State
OAO Gazprom v. The Republic of Lithuania, UNCITRAL
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
OI European Group B.V. v. Bolivarian Republic of Venezuela, ICSID Case No. ARB/11/25
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)
Eudoro Armando Olguín v. Republic of Paraguay, ICSID Case No. ARB/98/5
Jan Oostergetel and Theodora Laurentius v. The Slovak Republic, UNCITRAL
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