| Name | Country | Region | Address |
|---|---|---|---|
| Otrubyannikova Ksenya Vladimirovna | Russia | Ивановская область | |
| Ott Konstantin Viktorovich | Russia | Orenburg region | |
| Ott O.P. Omskaya oblast | Russia | Omsk region | |
| Ott Viktor Eduardovich | Russia | Irkutsk region | |
| Otverchenko S.I. | Russia | Saratov region | |
| OU OIGUSMAAKLER | Estonia | ||
| Oumar SOW CSE (Senegal) | |||
| OUSC "Planernaia" | Russia | Moscow | |
| Ovada Mihail Petrovich | Russia | Rostov region | |
| Ovalov Ochir Bazyrovich | Russia |